CN201514473U - Error positioning device of high-voltage electric power metering device - Google Patents

Abstract

The invention discloses an error positioning device of a high-voltage electric power metering device, which comprises a high-voltage high-current test power source, a reference electric power metering device, a high-voltage electric power metering device, a test power source stability control circuit, an overall error checking device, a transformer checking device, a monitoring device and a low-voltage electric power meter checking device, which are connected with each other. After checking the overall error of the high-voltage electric power metering device, if the error is too large, the error positioning device switches to the transformer checking mode and the low-voltage electric power meter checking mode and performs the full-automatic check of a voltage transformer, a current transformer and a low-voltage electric power meter and displays the error of the voltage transformer, the error of the current transformer, the composite error of the transformers and the error of the low-voltage electric power meter respectively, therefore, the reason of excessive overall error is positioned and relevant problem is solved.

Description

High-voltage electric-energy meter error location device

Technical field

The utility model relates to a kind of power equipment calibration equipment, particularly be a kind of can be to the accurate device of location of high-voltage electric-energy meter each several part error.

Background technology

Existing high-voltage electric-energy meter comprises that mainly electric metering box, metering cabinet and combined instrument transformer add electric energy meter etc., and its ingredient all is voltage transformer (VT), current transformer and voltage power table.Therefore, the method for calibration of conventional high-tension electric power meter is by checking the secondary voltage drop of voltage transformer (VT), current transformer, low-voltage electric energy table and voltage transformer (VT) respectively, then according to the composition error of the error calculating device of each several part.

The applicant's the applying date is that August 31, the patent No. in 2006 are that ZL200620098741.9 and name are called the high-voltage electric energy meter calibration equipment, and it comprises low voltage voltage current signal generation device, stepup transformer, current lifting device, standard electric energy meter, by school high-voltage electric energy meter test product platform, high-tension current inductor, high voltage potential transformer and twin check display device; The output terminal of low voltage voltage current signal generation device connects stepup transformer and current lifting device, the output terminal of stepup transformer and current lifting device is connected by school high-voltage electric energy meter, high-tension current inductor and high voltage potential transformer, high-tension current inductor, high voltage potential transformer are exported to standard electric energy meter, are all linked to each other with the twin check display device with standard electric energy meter by the school high-voltage electric energy meter.

In addition, the applicant's the applying date is a kind of electric-power metering cabinet global error on-site calibration device that March 14, the patent No. in 2008 are ZL200820008299.5, it comprises the power supply signal generation unit, three-phase voltage increasing device, current lifting device, standard high-voltage current transformer group, standard high-voltage voltage transformer (VT) group, standard electric energy meter and comparison display instrument.The power supply signal generation unit connects the three-phase voltage increasing device, current lifting device produces the required high-voltage great-current of field-checking, and connection standard high-voltage voltage transformer (VT), standard high-voltage current transformer and electric-power metering cabinet, the output terminal of standard mutual inductor connects standard electric energy meter, relatively display instrument connects the output terminal of standard electric energy meter and electric-power metering cabinet respectively, accept both electric power signal, and show verify error.

Above-mentioned two patents also provide the on-site calibrating method of metering cabinet global error for the verification of high-voltage electric-energy meter provides the method for global error verification.If satisfy the accuracy class requirement, do not have problem for the verification of global error.If but global error is overproof, just can't accurately locate for the problem of device so.Therefore need to seek new method can accurately detect voltage transformer (VT), current transformer and electric energy meter each several part under the overproof situation of global error error.

The utility model content

In view of this, it is a kind of under the overproof situation of global error that the technical problems to be solved in the utility model is to provide, high-voltage electric-energy meter error by each several part errors such as accurate detection voltage transformer (VT), current transformer and electric energy meters, thereby accurately the whole overproof reason in location is dealt with problems targetedly.

For solving the problems of the technologies described above, the technical solution of the utility model is achieved in that a kind of high-voltage electric-energy meter error location device, and it comprises the high-voltage great-current experiment power supply, is used to provide the high-voltage great-current test signal of safety and stability; The benchmark device for measurement of electrical energy is used to obtain described high-voltage great-current test signal, is converted into standard energy value, standard potential transformer signal or standard current transformer signal; High-voltage electric-energy meter is used for the described high-voltage great-current test signal of acquisition, generates check energy value or mutual inductor measuring value; Experiment power supply degree of stability control circuit is used to detect the voltage of described high-voltage great-current test signal, the amplitude and the phase place of electric current; The global error calibration equipment, the described standard energy value and the described detection energy value that are used for obtaining compare; The transducer check device, the described standard potential transformer signal or the standard current transformer signal that are used for obtaining compare, and draw the error and the resultant error of mutual inductor;

Supervising device is provided with the program of Interventions Requested, and according to the benchmark device for measurement of electrical energy described Interventions Requested is carried out the setting of correlation parameter, and the assay of obtaining is stored, and controls the output state of described high-voltage great-current test unit simultaneously; Low-voltage electric energy table calibration equipment is used for the low-voltage electric energy table is carried out error checking, and the signal and the standard electric power signal of the low-voltage electric energy table surveyed compared, and obtains the error of low-voltage electric energy table and the result is sent to described supervising device to store.

The technique effect that the utility model reaches is as follows:

1, error location device of the present utility model is applicable to the global error verification of conventional high-tension electric power meter, also is applicable to the error checking of voltage transformer (VT), current transformer, mutual inductor resultant error and low-voltage electric energy table.This error location device is after carrying out the global error verification to high-voltage electric-energy meter, if error is overproof, then can change to transducer check pattern and low-voltage electric energy table checking mode, voltage transformer (VT) and current transformer and low-voltage electric energy table are carried out full-automatic verification, and difference display voltage mutual inductor, current transformer, the resultant error of mutual inductor and the error of low-voltage electric energy table, with location global error overproof reason, and solve according to corresponding problem.

2, error location device of the present utility model not only can be used for the delivery test detection of high-voltage electric-energy meter, can also be used for the field-checking of electric-power metering cabinet.Solve the problem of parts error location after global error directly detects, can realize the direct detection of global error and fractional error.Under the overproof situation of global error, can accurately locate the error of parts, and determine overproof reason, and improve targetedly according to the situation of each parts error.The direct resultant error of measuring voltage mutual inductor summation current transformer, and according to the suitable low-voltage electric energy table of this resultant error pairing.

3, in the field-checking of metering cabinet, owing to can directly measure the error of global error, mutual inductor resultant error and the low-voltage electric energy table of metering cabinet, deduct the error of mutual inductor resultant error and low-voltage electric energy table by global error, just can draw the caused error of transformer secondary voltage drop, thereby determine whether to need to improve the secondary connection of mutual inductor.

Description of drawings

Fig. 1 is the structured flowchart of the utility model high-voltage electric-energy meter error location device.

Embodiment

As shown in Figure 1, be the structured flowchart of high-voltage electric-energy meter error location device, it comprises high-voltage great-current experiment power supply 1, is used to provide the high-voltage great-current test signal of safety and stability;

Benchmark device for measurement of electrical energy 2 is used to obtain described high-voltage great-current test signal, is converted into standard energy value, standard potential transformer signal or standard current transformer signal;

High-voltage electric-energy meter 3 is used for the described high-voltage great-current test signal of acquisition, generates check energy value or mutual inductor measuring value;

Experiment power supply degree of stability control circuit 4 is used to detect the voltage of described high-voltage great-current test signal, the amplitude and the phase place of electric current;

Global error calibration equipment 5, the described standard energy value and the described detection energy value that are used for obtaining compare;

Transducer check device 6, the described standard potential transformer signal or the standard current transformer signal that are used for obtaining compare, and draw the error and the resultant error of mutual inductor;

Supervising device 7 is provided with the program of Interventions Requested, and according to the benchmark device for measurement of electrical energy described Interventions Requested is carried out the setting of correlation parameter, and the assay of obtaining is stored, and controls the output state of described high-voltage great-current test unit simultaneously; And

Low-voltage electric energy table calibration equipment 8, be used for the low-voltage electric energy table is carried out error checking, and the signal and the standard electric power signal of the low-voltage electric energy table surveyed compared, obtain the error of low-voltage electric energy table and the result be sent to described supervising device to show, store.

This calibration equipment carries out after the global error verification in that high-voltage electric-energy meter is passed through global error calibration equipment 5, if error is overproof, then the error location device can be switched to transducer check pattern and low-voltage electric energy table checking mode.By transducer check device 6 and low-voltage electric energy table verifying attachment 8, voltage transformer (VT), current transformer and low-voltage electric energy table are carried out full-automatic verification, and difference display voltage mutual inductor, current transformer, the resultant error of mutual inductor and the error of low-voltage electric energy table, determine the overproof concrete reason of global error to locate, thereby can deal with problems targetedly.

Wherein, the flow process of transducer check is: by supervising device 7 the transducer check program is set, and testing process, trial voltage, electric current and the power factor of corresponding needs be set, and send to the processor of high-voltage great-current experiment power supply 1, and detect the amplitude of high-voltage great-current signal voltage, electric current and the result of phase place according to experiment power supply degree of stability control circuit 4 automatically, high-voltage great-current experiment power supply 1 is adjusted, made 1 output of high-voltage great-current experiment power supply satisfy the test signal of test stability and reliability requirement; Also the correlation parameter by 7 pairs of benchmark device for measurement of electrical energy 2 of supervising device is provided with simultaneously, measure signal by high-voltage electric-energy meter 3 output mutual inductors, compare and obtain the error of voltage transformer (VT), the error of current transformer and the resultant error of mutual inductor by transducer check device 6, and the result is sent to supervising device 7 show and preserve.Verification for the low-voltage electric energy table, low-voltage electric energy table calibration equipment 8, be used for the low-voltage electric energy table is carried out error checking, and the signal and the standard electric power signal of the low-voltage electric energy table surveyed compared, obtain the error of low-voltage electric energy table, and the result is sent to supervising device 7 shows and store.

The above is preferred embodiment of the present utility model only, is not to be used to limit protection domain of the present utility model.

Claims (2)

1. high-voltage electric-energy meter error location device is characterized in that it comprises:

The high-voltage great-current experiment power supply is used to provide the high-voltage great-current test signal of safety and stability;

The benchmark device for measurement of electrical energy is used to obtain described high-voltage great-current test signal, is converted into standard energy value, standard potential transformer signal or standard current transformer signal;

High-voltage electric-energy meter is used for the described high-voltage great-current test signal of acquisition, generates check energy value or mutual inductor measuring value;

Experiment power supply degree of stability control circuit is used to detect the voltage of described high-voltage great-current test signal, the amplitude and the phase place of electric current;

The global error calibration equipment, the described standard energy value and the described detection energy value that are used for obtaining compare;

The transducer check device, the described standard potential transformer signal or the standard current transformer signal that are used for obtaining compare, and draw the error and the resultant error of mutual inductor;

Supervising device is provided with the program of Interventions Requested, and according to the benchmark device for measurement of electrical energy described Interventions Requested is carried out the setting of correlation parameter, and the assay of obtaining is stored, and controls the output state of described high-voltage great-current test unit simultaneously; And

Low-voltage electric energy table calibration equipment, be used for the low-voltage electric energy table is carried out error checking, and the signal and the standard electric power signal of the low-voltage electric energy table surveyed compared, obtain the error of low-voltage electric energy table and the result be sent to described supervising device to show and store.

2. high-voltage electric-energy meter error location device as claimed in claim 1 is characterized in that, the Interventions Requested of described supervising device are inspection process, voltage, electric current or function factor.

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