Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a flowchart of a correction coefficient calculating method based on a three-phase three-wire metering device according to an embodiment of the present invention, where, as shown in fig. 1, the calculating method includes:
and S101, detecting a three-phase voltage vector and a two-phase current vector of the three-phase three-wire metering device under any wiring.
It can be understood that fig. 2 is a schematic diagram of a connection mode of a three-phase three-wire metering device according to an embodiment of the present invention, wherein the three-phase three-wire metering device is electrically connected to a three-phase access line ABC, and the electric quantity metering of the three-phase three-wire metering device is composed of a voltage transformer TV1, a voltage transformer TV2, a current transformer TA1, a current transformer TA2, and a three-phase three-wire basic metering unit 100, and when the three-phase three-wire metering device is correctly connected, the a-phase voltage is a phase voltageSplicing jointB-phase voltageGrounded and connected in parallel toC-phase voltageSplicing jointPhase A current feedSplicing jointC phase current feedThe connection is carried out,AndA first element is formed and is arranged to be a first element,AndA second element is formed, at this time, satisfyingHowever, when a three-phase three-wire metering device is in a wrong connection or disconnected connection, the above equations are not satisfied at the same time, i.e. the voltage or current connected to the first element and the second element is not necessarily the correct voltage or current. Thus, by detecting the three-phase voltage vector of the three-phase three-wire metering device under any wiringAndTwo-phase current vectorAndThe problem of wiring errors, particularly the problem of phase failure caused by disconnection of the wiring, of the three-phase three-wire metering device can be determined through further judging and analyzing.
S102, determining the actual wiring phase sequence and the phase failure position of the three-phase three-wire metering device according to the three-phase voltage vector and the two-phase current vector.
Specifically, referring to fig. 2, in the case of correct wiring of the three-phase three-wire metering device, the detected three-phase voltage vectorAndShould correspond to respectivelyAndWherein, theIs set to zero in the voltage amplitude of (a),AndIs the same as the voltage of the two phasesAndRespectively correspond toAndAnd is also provided withAndIncluded angle between andAndThe included angles are the same, once the three-phase voltage vectors are actually detectedAndTwo-phase current vectorAndThe relationship in the case of incorrect wiring can be obtained by directly observing the voltage values, or by three-phase voltage vectorsAndTwo-phase current vectorAndThe obtained voltage-current vector relation diagram determines the actual wiring phase sequence and the phase failure position of the three-phase three-wire metering device. It should be noted that, when determining the actual wiring phase sequence and the phase failure position of the three-phase three-wire metering device according to the voltage-current vector relation diagram, further determination can be performed according to the fact that the included angle between the two-phase current vectors is 120 degrees, so as to accurately determine the phase failure position.
S103, calculating the actual active power value according to a first preset rule according to the phase failure position.
The first preset rule may be a preset calculation model of electric quantity measurement in the three-phase three-wire measuring device, for example, a calculation formula of actual voltage, etc., and it is understood that the first preset rule may be different according to different phase failure positions, and the embodiment of the present invention is not limited herein specifically.
It will be appreciated that with reference to fig. 2, in the case of a correct connection of the three-phase three-wire metering device, the power P1 measured by the first element isWherein Uab is the line voltage amplitude, Ia is the a-phase current value,An included angle between Uab and Ia, and a power P2 measured by the second element ofWherein Ucb is the line voltage amplitude, Ic is the c-phase current value,Is the angle between Ucb and Ic. Therefore, the actual active power value P of the three-phase three-wire metering device is p=p1+P2.
Therefore, after the specific phase failure position of the connecting line of the three-phase three-wire metering device is determined, the parameters such as actual measured voltage, current and the like can be determined according to the corresponding calculation formula, and then the actual active power value is further calculated.
S104, determining a correction coefficient according to the actual active power value and the theoretical active power value.
Specifically, the correction coefficient refers to the correction coefficient of the wrong wiring, and is the power value to be measured under the condition of the correct wiring of the electric energy meter under the same power factor, namely the ratio of the theoretical active power value to the actual active power value measured by the wrong wiring. Further, after determining the correction coefficient, the electric quantity and the electric charge and the like which need to be supplemented can be obtained according to the calculation of the correction coefficient.
In this embodiment, by detecting the three-phase voltage vector and the two-phase current vector of the three-phase three-wire metering device under any wiring, the actual wiring phase sequence and the phase failure position of the three-phase three-wire metering device can be determined by analysis processing, then the actual active power value can be calculated according to the determined phase failure position and the first preset rule, and then the correction coefficient is determined according to the actual active power value and the theoretical active power value. Therefore, the calculation efficiency and accuracy of correction coefficients of the three-phase three-wire metering device are improved, and particularly the analysis processing efficiency and accuracy of the three-phase three-wire metering device under the condition of phase failure are improved, so that loss and safety accidents are avoided.
Optionally, fig. 3 is a flowchart of another correction coefficient calculating method based on a three-phase three-wire metering device according to an embodiment of the present invention, as shown in fig. 3, the determining an actual wiring phase sequence and a phase interruption position of the three-phase three-wire metering device according to a three-phase voltage vector and a two-phase current vector includes determining a reference voltage vector and a phase voltage vector corresponding to an actual ground of the three-phase three-wire metering device according to the three-phase voltage vector, wherein an amplitude of the reference voltage vector is equal to a phase voltage amplitude measured by the three-phase three-wire metering device when the three-phase three-wire metering device is correctly wired, detecting an included angle between the two-phase current vector and the reference voltage vector, determining a line voltage vector corresponding to the reference voltage vector according to the reference voltage vector and the phase voltage vector corresponding to the actual ground of the three-phase three-wire metering device, determining a voltage current vector parameter map according to an included angle between the two-phase current vector and the reference voltage vector, and determining an actual wiring phase sequence and a phase interruption position of the three-phase three-wire metering device when the voltage current vector parameter map meets a second preset rule. Therefore, the correction coefficient calculation method includes the steps of:
and S301, detecting a three-phase voltage vector and a two-phase current vector of the three-phase three-wire metering device under any wiring.
S302, determining a reference voltage vector and a phase voltage vector corresponding to the actual grounding of the three-phase three-wire metering device according to the three-phase voltage vector, wherein the amplitude of the reference voltage vector is equal to the amplitude of the phase voltage measured by the three-phase three-wire metering device when the three-phase three-wire metering device is correctly connected.
Specifically, the detected three-phase voltage vectorAndThe medium amplitude value is compared with the theoretical voltage amplitude value (namely the phase voltage amplitude value measured by the three-phase three-wire metering device in correct wiring), and the three-phase voltage vector is calculatedAndThe phase voltage vector with the medium amplitude equal to the theoretical voltage amplitude is the reference voltage vector. At the same time, three-phase voltage vectors can be also usedAndThe phase voltage vector with a median value equal to zero is determined as the actual ground phase in the three-phase three-wire metering device, i.e. phase b in fig. 2.
S303, detecting included angles between the two-phase current vectors and the reference voltage vector respectively.
Specifically, after the reference voltage vector is determined, the two-phase current vector can be further detectedAndIncluded angles with the reference voltage vector, respectively.
S304, determining a line voltage vector corresponding to the reference voltage vector according to the reference voltage vector and a phase voltage vector corresponding to the actual grounding of the three-phase three-wire metering device.
Specifically, since the reference voltage vector corresponds to the voltage of the phase connection line to the ground, after the phase voltage vector corresponding to the actual ground of the three-phase three-wire metering device is determined, the line voltage vector formed by the reference voltage vector and the actual ground phase can be obtained.
Exemplary, the reference voltage vector isThe actual grounding phase of the three-phase three-wire metering device is b-phase, so the line voltage vector corresponding to the reference voltage vector isAt uncertainty ofIn the case of the actual a-phase or c-phase,May beOr alternatively
Therefore, according to the reference voltage vector and the phase voltage vector corresponding to the actual ground of the three-phase three-wire metering device, the line voltage vector corresponding to the reference voltage vector is determined, and meanwhile, in combination with the analysis of the actual situation, the line voltage vector may be one line voltage vector which is determined, or may be two line voltage vectors which are not determined, and when the specific line voltage vector is not determined, the analysis determination can be performed through a further voltage-current vector relation diagram.
S305, determining a voltage-current vector parameter diagram according to the line voltage vector, the two-phase current vector and the included angle between the two-phase current vector and the reference voltage vector, which correspond to the reference voltage vector.
Specifically, all the line voltage vectors corresponding to the reference voltage vectors can be listed one by one, and then according to different line voltage vectors, two-phase current vectors and included angles between the two-phase current vectors and the reference voltage vectors, a plurality of voltage current vector parameter diagrams can be obtained. After determining the line voltage vector corresponding to the reference voltage vector, the included angles between the two phase current vectors and the reference voltage vector are the included angles between the two phase current vectors and the line voltage vector, respectively.
It can be appreciated that when determining the voltage-current vector parameter diagram, it is also necessary to determine whether the phase sequence of the voltage is the positive phase sequence or the negative phase sequence in advance, so as to determine the two-phase-current vector in the voltage-current vector parameter diagram more accuratelyAndAnd the included angles with the reference voltage vector respectively avoid errors in the voltage-current vector parameter diagram, thereby influencing further analysis and processing.
And S306, determining the actual wiring phase sequence and the phase failure position of the three-phase three-wire metering device when the voltage and current vector parameter diagram meets a second preset rule.
Optionally, the second preset rule includes that current polarities of two phase current vectors in the voltage-current vector parameter diagram are the same and an included angle is 120 degrees, and an included angle between the voltage vector and the current vector of the same phase is smaller than 60 degrees. It can be understood that the second preset rule further includes that the magnitudes of the two-phase current vectors are equal, which is not described herein, and a person skilled in the art can determine that the correct voltage-current vector parameter map satisfies all the second preset rules according to the rule that the voltage-current vector parameter map must satisfy, further determine that the line voltage vector corresponding to the voltage-current vector parameter map is correct, and then determine the actual phase voltage vector according to the reference voltage vector, that is, one phase that is not broken, so as to determine that the other phase is the one phase that is broken. In addition, whether the actual wiring phase sequence is correct at the moment can be determined according to the voltage-current vector parameter diagram.
S307, calculating the actual active power value according to the phase failure position and the first preset rule.
S308, determining a correction coefficient according to the actual active power value and the theoretical active power value.
The following describes, with a specific example, the detected three-phase voltage vectorAndThe corresponding amplitudes are 26V, 0V and 100V, respectively. It is known that three-phase three-wire metering devices read a voltage of 100V in the case of correct wiring, so thatFurther measuring the two-phase current vector as the reference voltage vectorAndRespectively withIncluded angles of 110 deg. and 350 deg., respectively. Due toThe amplitude of (2) is 0V, which shows thatNamely the actual grounding phase b of the three-phase three-wire metering device, and further can be determinedAt this time, the liquid crystal display device,May beOr alternativelyAssume thatTwo-phase current vectorAndRespectively withThe included angle of (2) is 110 DEG and 350 DEG, and a two-phase current vector can be obtainedAndIs actually relative toThe corresponding voltage-current vector parameter diagram is shown in fig. 4. Again assume thatTwo-phase current vectorAndRespectively withThe included angle of (2) is 110 DEG and 350 DEG, and a two-phase current vector can be obtainedAndIs actually relative toThe corresponding voltage-current vector parameter diagram is shown in fig. 5. With further reference to fig. 4 and 5, assume thatDue to the phase current vector in the voltage-current vector parameter diagram of fig. 4And (3) withIncluded angle of more than 60 degrees and phase current vectorAnd (3) withThe included angle of (2) is larger than 60 degrees, and the second preset rule is not satisfied. Whereas the phase current vector in the voltage-current vector parameter diagram of fig. 5And (3) withIncluded angle of less than 60 degrees and phase current vectorAnd (3) withIs smaller than 60 degrees, can be determinedI.e. the actual c-phase, and can then be determinedThe actual a phase is the open phase.
Optionally, fig. 6 is a flowchart of another correction coefficient calculating method based on a three-phase three-wire metering device according to an embodiment of the present invention, as shown in fig. 6, calculating an actual active power value according to a first preset rule according to a phase failure position, including determining a voltage equivalent circuit according to a basic metering unit in the three-phase three-wire metering device, determining an actual voltage value measured by a first element in the basic metering unit and an actual voltage value measured by a second element according to the voltage equivalent circuit and the phase failure position, and calculating the actual active power value by an active power calculation formula according to the actual voltage value measured by the first element, the actual voltage value measured by the second element and a two-phase current vector. Therefore, the correction coefficient calculation method includes the steps of:
And S601, detecting a three-phase voltage vector and a two-phase current vector of the three-phase three-wire metering device under any wiring.
S602, determining the actual wiring phase sequence and the phase failure position of the three-phase three-wire metering device according to the three-phase voltage vector and the two-phase current vector.
And S603, determining a voltage equivalent circuit according to a basic metering unit in the three-phase three-wire metering device.
Specifically, fig. 7 is a voltage equivalent circuit diagram of a basic metering unit in a three-phase three-wire metering device according to an embodiment of the present invention, as shown in fig. 7, the voltage equivalent circuit includes a, b and c three-phase voltage input terminals, a first resistor R1 connected in parallel between the a-phase and b-phase voltage input terminals, a second resistor R2 and a third resistor R3 connected in parallel between the b-phase and c-phase voltage input terminals, and a fourth resistor R4 connected in parallel between the a-phase and c-phase voltage input terminals, where the resistance values of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are the same, and in the case that the three-phase three-wire metering device is wired correctly, and the voltage provided by the access line ABC is balanced, the voltage values between each two phases are the same, for example, 100V.
S604, determining an actual voltage value measured by a first element and an actual voltage value measured by a second element in the basic metering unit according to the voltage equivalent circuit and the phase failure position.
With continued reference to fig. 2, the phase interruption position includes a primary side of the voltage transformer or a secondary side of the voltage transformer, where the primary side of the voltage transformer is a side electrically connected to the access line, and the secondary side of the voltage transformer is a side electrically connected to the basic metering unit.
The open-phase position is exemplified as the A phase of the secondary side of the voltage transformer, and according to the voltage equivalent circuit shown in FIG. 7, it can be determined that the actual voltage value Uab measured by the first element in the three-phase three-wire metering device should beThe actual voltage value measured by the second element Ucb is Ucb＝U0, where U0 is the voltage value between each two phases with the three-phase three-wire metering device properly wired and the voltage provided by the access line ABC balanced. Or the open-phase position is the B phase of the secondary side of the voltage transformer, the actual voltage value Uab measured by the first element isThe actual voltage value Ucb measured by the second element is
In addition, taking the situation that the three-phase three-wire metering device is correctly wired and the voltage provided by the access line ABC is balanced as an example, if a certain phase fuse tube on the primary side of the voltage transformer is fused, the voltage value on the secondary side is correspondingly changed, and the change range is generally 0V, 50V or 100V. For example, when the primary side phase a is out of phase, Uab＝0V,Ucb＝Uca = 100V, and when the primary side phase B is out of phase, this corresponds to a single phase 100V power supply added between the AC phases, so Uab＝Ucb = 50V. It can be understood that, according to the voltage value between each two phases of the three-phase three-wire metering device under the condition of correct wiring and balanced voltage provided by the access line ABC, the voltage equivalent circuit is utilized to determine the actual voltage value measured by the first element and the actual voltage value measured by the second element when the voltage of any one phase is out of phase, which is not illustrated in the examples of the present invention.
S605, calculating the actual active power value by using an active power calculation formula according to the actual voltage value measured by the first element, the actual voltage value measured by the second element and the two-phase current vector.
Specifically, fig. 8 is a voltage-current vector parameter diagram under the correct three-phase three-wire connection provided by the embodiment of the present invention, and referring to fig. 2 and 8, the actual voltage value measured by the first element is Uab, the actual voltage value measured by the second element is Ucb, the current values corresponding to the two-phase current vectors are Ia and Ic respectively, and then the actual active power value P is calculated by using an active power calculation formula:
Wherein Ia is a phase current value, Ic is a phase current value,Is the included angle between Uab and Ia,Is the angle between Ucb and Ic.
It will be appreciated that, when the load electrically connected to the access line ABC is a balanced load,AndCan be unified with the same included angleAnd (3) representing.
S606, determining a correction coefficient according to the actual active power value and the theoretical active power value.
Wherein, the correction coefficient is determined according to the actual active power value and the theoretical active power value, and the correction coefficient K can be determined according to the following formula:
Wherein P0 is the theoretical active power value, P is the actual active power value, U is the phase voltage amplitude, I is the phase voltage amplitude, Uab is the line voltage amplitude, Ucb is the line voltage amplitude, Ia is the a-phase current value, Ic is the c-phase current value,Is the included angle between Uab and Ia,Is the included angle between Ucb and Ic,Is the included angle between U and I.
Optionally, fig. 9 is a flowchart of another correction coefficient calculating method based on a three-phase three-wire metering device according to an embodiment of the present invention, as shown in fig. 9, after determining the correction coefficient according to the actual active power value and the theoretical active power value, the method further includes obtaining an error electric energy value when the three-phase three-wire metering device is out of phase, and determining the additional electric quantity and the additional expense according to the correction coefficient and the error electric energy value. Therefore, the correction coefficient calculation method includes the steps of:
And S901, detecting a three-phase voltage vector and a two-phase current vector of the three-phase three-wire metering device under any wiring.
S902, determining the actual wiring phase sequence and the phase failure position of the three-phase three-wire metering device according to the three-phase voltage vector and the two-phase current vector.
S903, calculating an actual active power value according to a first preset rule according to the phase failure position.
S904, determining a correction coefficient according to the actual active power value and the theoretical active power value.
S905, obtaining an error electric energy value when the three-phase three-wire metering device is out of phase.
S906, determining the additional electric quantity and the compensation withdrawal cost according to the correction coefficient and the error electric energy value.
Specifically, the purpose of calculating the correction coefficient of the three-phase three-wire metering device is to calculate the correction coefficient and the error electric energy value when the three-phase three-wire metering device is out of phase to obtain the additional electric quantity, and refund more or less electric charges to reduce the loss of enterprises or power grid companies. The calculation formula of the additional electric quantity DeltaW is shown as DeltaW= (K-1) We, wherein We is an error electric energy value when the three-phase three-wire metering device is out of phase.
Based on the same inventive concept, the embodiment of the invention also provides a correction coefficient calculating device based on a three-phase three-wire metering device, fig. 10 is a schematic structural diagram of the correction coefficient calculating device based on the three-phase three-wire metering device, and is combined with fig. 2 and 10 to show that the three-phase three-wire metering device is electrically connected with a three-phase access line ABC.
In this embodiment, the detection module 10 detects the three-phase voltage vector and the two-phase current vector of the three-phase three-wire metering device under any connection, the judgment module 20 performs analysis processing to determine the actual connection phase sequence and the phase failure position of the three-phase three-wire metering device, and the calculation module 30 calculates the actual active power value according to the determined phase failure position and the first preset rule, and determines the correction coefficient according to the actual active power value and the theoretical active power value. Therefore, the correction coefficient calculating device can improve the calculation efficiency and accuracy of the correction coefficient of the three-phase three-wire metering device, particularly the analysis processing efficiency and accuracy of the three-phase three-wire metering device under the condition of phase failure, and loss and safety accidents are avoided.
The three-phase three-wire metering device comprises a primary side of the voltage transformer or a secondary side of the voltage transformer, wherein the primary side of the voltage transformer is the side electrically connected with the access line, and the secondary side of the voltage transformer is the side electrically connected with the basic metering unit.
An embodiment of the present invention further provides an electronic device, and fig. 11 is a schematic structural diagram of an electronic device provided by the embodiment of the present invention, where, as shown in fig. 11, the electronic device includes a display terminal 100, the display terminal includes at least one processor 101, and a memory 102 communicatively connected to the at least one processor 101, where the memory 102 stores a computer program executable by the at least one processor 101, and the computer program is executed by the at least one processor 101, so that the at least one processor 101 can execute the correction coefficient calculating method based on the three-phase three-wire metering device in any of the foregoing embodiments.
Specifically, the electronic device may further comprise an input device 103 and an output device 104.
The processor 101, memory 102, input device 103, and output device 104 in the electronic device may be connected by a bus or other means, for example by a bus connection in fig. 11.
The memory 102 in the electronic device is used as a computer readable storage medium for storing one or more programs, which may be software programs, computer executable programs and modules, such as program instructions/modules corresponding to the correction coefficient calculating method based on the three-phase three-wire metering device provided in the embodiment of the present invention. The processor 101 executes software programs, instructions and modules stored in the memory 102 to perform various functional applications and data processing of the electronic device, i.e., to implement the correction coefficient calculation method based on the three-phase three-wire metering device in the above-described method embodiment.
The memory 102 may include a storage program area that may store an operating system, application programs required for at least one function, and a storage data area that may store data created according to the use of the electronic device, etc. In addition, memory 102 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage device. In some examples, memory 102 may further include memory located remotely from processor 101, which may be connected to the device via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input means 103 may be used to receive entered numeric or character information and to generate key signal inputs related to user settings and function control of the electronic device. The output device 104 may include a display device such as a display screen.
And, when one or more programs included in the above-described electronic device are executed by the one or more processors 101, the programs perform the operations of:
detecting a three-phase voltage vector and a two-phase current vector of the three-phase three-wire metering device under any wiring;
determining the actual wiring phase sequence and the phase failure position of the three-phase three-wire metering device according to the three-phase voltage vector and the two-phase current vector;
Calculating an actual active power value according to a first preset rule according to the phase failure position;
and determining a correction coefficient according to the actual active power value and the theoretical active power value.
Of course, it will be appreciated by those skilled in the art that the program may also perform the relevant operations of the correction coefficient calculation method based on the three-phase three-wire metering device provided in any embodiment of the present invention when the one or more programs included in the electronic device are executed by the one or more processors 101.
The embodiment of the invention also provides a computer readable storage medium, on which a computer program is stored, the program being executed by a processor to perform a correction coefficient calculation method based on a three-phase three-wire metering device, the method comprising:
detecting a three-phase voltage vector and a two-phase current vector of the three-phase three-wire metering device under any wiring;
determining the actual wiring phase sequence and the phase failure position of the three-phase three-wire metering device according to the three-phase voltage vector and the two-phase current vector;
Calculating an actual active power value according to a first preset rule according to the phase failure position;
and determining a correction coefficient according to the actual active power value and the theoretical active power value.
The computer storage media of embodiments of the invention may take the form of any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the computer-readable storage medium include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access Memory (Random Access Memory, RAM), a Read Only Memory (ROM), an erasable programmable Read Only Memory (Erasable Programmable Read Only Memory, EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, radio frequency (RadioFrequency, RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.