CN102487245A - Simulation system of microcomputer relay protection logical test signal system - Google Patents

Abstract

The invention relates to a microcomputer relay protection simulation system, and in particular relates to a simulation system of a microcomputer relay protection logical test signal system. The simulation system of the microcomputer relay protection logical test signal system comprises a comprehensive protector, a switch which is connected with the comprehensive protector to form a circuit and a secondary circuit signal system of the switch, and the simulation system of the microcomputer relay protection logical test signal system also comprises a signal power supply, wherein the signal power supply, the switch and the secondary circuit signal system of the switch are connected with the comprehensive protector in parallel. The simulation system provided by the invention can realize simulation on working conditions, a control loop and a secondary signal environment of the switch in a relay protection secondary circuit, thus an application logical program test of the comprehensive protector can be changed into a laboratory simulation test from field measurement.

Description

Microcomputer type relay protection logic testing signal system analogue system

Technical field

The present invention relates to the microcomputer type relay protection analogue system, relate in particular to a kind of analogue system of microcomputer type relay protection signal system.

Background technology

Relaying protection plays important effect in power supply-distribution system, undertaking the warning when working as system's generation irregular operating and fault or sending the function of trip command.The relaying protection secondary circuit is a complicated loop with multiple function, generally comprises the functions such as control, signal, relaying protection and automatics, operating power, measurement and supervision to all kinds of electric equipments or circuit.

General secondary circuit all adopts pure hardware such as auxiliary relay, the time relay to build, and realizes various secondary logics and condition locking.Electric personnel must be at the scene; Through to switch one action condition; As test position, working position, ground connection cutter, and higher level's mains switch on/off switch position, relevant secondary singal, operating power etc. are carried out realistic simulation; According to the contact action situation of auxiliary relay, the time relay etc., judge the correctness and the integrality of relaying protection secondary logical circuit again.

But whether the secondary programming in logic rationally, correctly needs us to go test and affirmation equally in the complex protection device.If adopt above-mentioned conventional method, carry out the realistic simulation of switch one action condition, secondary singal and operating power etc. in the complex protection device erecting bed, need the primary equipment of operation site equally, the secondary singal of simulated field.These have very high requirement to contact, secure scheme and technical scheme, need long interruption duration, when some specific function does not satisfy in external condition, also can't carry out comprehensive logic testing.

Summary of the invention

The present invention is intended to address the above problem, and a kind of microcomputer type relay protection logic testing signal system analogue system is provided.The present invention realizes condition of work, the control loop to switch in the relaying protection secondary circuit, the emulation of secondary singal environment, thereby makes the applied logic program test of comprehensive protection device can transfer laboratory's emulation testing to by field measurement.

For addressing the above problem; The present invention is achieved in that a kind of microcomputer type relay protection logic testing signal system analogue system; It comprises: comprehensive protector and be connected to the switch and the secondary circuit signal system thereof in loop with it; It also comprises signal power source, and it is with switch and secondary circuit signal system thereof and insert said comprehensive protector.

Described microcomputer type relay protection logic testing signal system analogue system; Said switch and secondary circuit signal system thereof comprise man-machine interactive system and the PLC that transmitted in both directions links together, and said man-machine interactive system has the template of signal circuit figure, control loop figure and high-voltage switch gear schematic diagram; Described PLC is used for analog switch combined floodgate logic and separating brake logical program, and the DI/DO signal of its input/output terminal and said comprehensive protector carries out transmitted in both directions and is connected.

Described microcomputer type relay protection logic testing signal system analogue system, said signal circuit figure template comprises the template of a major loop; Said control loop figure template comprises: the divide-shut brake circuit theory figure template of position, the test position of switch/operation schematic diagram template a, distant place/on the spot; Said high-voltage switch gear schematic diagram template comprises the allocation plan paper matrix plate of the digital input port (DI) of switch cubicle inside and extraneous signal and microcomputer type protective device.

Described microcomputer type relay protection logic testing signal system analogue system; Said PLC divides circuit breaker and contactor to work out signal list for two kinds according to the characteristic of the position of switch in power supply-distribution system and institute charged gas equipment, and each variable in each schematic diagram template is carried out signal configures and definition.

The present invention has mixed physical simulation on the basis of Digital Simulation; Output dry contact like PLC is connected through signal power source (like DC110V) and comprehensive protector; The displacement of PLC output contact state; Then complex protection device DI incoming level changes, and has really simulated the various signals and the level height thereof of on-the-spot switch.Through to switch condition of work, secondary singal environment in the microcomputer type relay protection logic testing signal system; The branch of switch, the simulation of combined floodgate, emulation; Make the microcomputer type relay protection logic testing in laboratory, can accomplish; Littler than on-the-spot actual test risk, can improve testing efficiency again, guarantee test mass.

Description of drawings

Below in conjunction with embodiment the present invention is further described:

Fig. 1 is principle of the invention figure.

Embodiment

As shown in Figure 1: a kind of microcomputer type relay protection logic testing signal system analogue system; It comprises:comprehensive protector 1 and be connected to the switch and the secondarycircuit signal system 2 thereof in loop with it; It also comprisessignal power source 3, and it is with switch and secondarycircuit signal system 2 thereof and insert saidcomprehensive protector 1.

Described microcomputer type relay protection logic testing signal system analogue system; Said switch and secondary circuit signal system thereof comprise man-machine interactive system and the PLC that transmitted in both directions links together, and said man-machine interactive system has the template of signal circuit figure, control loop figure and high-voltage switch gear schematic diagram; Described PLC is used for analog switch combined floodgate logic and separating brake logical program, and the DI/DO signal of its input/output terminal and said comprehensive protector carries out transmitted in both directions and is connected.

Described microcomputer type relay protection logic testing signal system analogue system, said signal circuit figure template comprises the template of a major loop; Said control loop figure template comprises: the divide-shut brake circuit theory figure template of position, the test position of switch/operation schematic diagram template a, distant place/on the spot; Said high-voltage switch gear schematic diagram template comprises the allocation plan paper matrix plate of the digital input port (DI) of switch cubicle inside and extraneous signal and microcomputer type protective device.

Utilize input (the IN)/output (OUT) and the program capability of PLC execution unit, and with the communication function of HMI supervisory control system, realize one action condition, secondary singal environment, and the branch of switch, the simulation of closing a floodgate, emulation to switch.

The concrete introduction as follows:

HMI: all inlets that the inner secondary logic simulation of comprehensive protector test function is provided.The drawing template that shows and store various switches---both high-voltage switch gear schematic diagram, signal circuit figure, control loop figure; All signal condition pictures, logical program and management information etc.Through operation interface can the simulated high-pressure switch close, separating brake, force or revise the signal condition of high-voltage switch gear schematic diagram, control loop figure and signal circuit; With the PLC real time communication, carry out the transmitted in both directions of signal, can show each I/O state of PLC execution unit in real time.

PLC: analog switch combined floodgate logic and separating brake logical program, and carry out transmitted in both directions with the DI/DO signal of HMI monitoring, comprehensive protector.The input of PLC, output directly are connected with the DI/DO of comprehensive protector through the external power source circuit, thereby the required switch of comprehensive protector internal application logic testing and the coherent signal of secondary circuit are provided, and realize the object of the invention.

In the process that the foregoing invention general thought realizes, following three key technologies are arranged:

Establishment switch quadratic diagram template

For realizing the foregoing invention purpose; Need be from traditional secondary wiring drawing; Sum up and make three types of drawing templates that are used to realize the logic testing of microcomputer protecting device internal application; These drawing templates are one action condition, secondary singal environment and branch, the closing circuit of reactive switches comprehensively.

Table 1. traditional secondary wiring drawing

Analyze above-mentioned drawing, corresponding the object of the invention has been summed up the three type drawing templates relevant with goal of the invention, and drawing template (to one type of switch and institute's carrying device) has versatility.

The three type drawing templates relevant that table 2. is confirmed with goal of the invention

Confirm the universal signal table

After having worked out the quadratic diagram template, again according to the position of switch in power supply-distribution system with the characteristic of charged gas equipment, worked out the universal signal table, be used for each variable among the template figure being carried out signal configures and definition in the invention process.

For example: send the switch of transformer can carry out the establishment of universal signal table by table 3 mode, switch divides two kinds in circuit breaker and contactor.

Table 3. send the switch universal signal table of transformer

Along with the application scenario is different, the signal in the table 3 can be augmented according to the physical device situation.

Formulate the general combined floodgate and the separating brake logic of switch

In implementation process of the present invention; To come the combined floodgate logic and the separating brake logic of analog switch with PLC; Must according to actual switch once with secondary hardware device, and its branch, closing locking condition; The general soft logic of establishment one cover, thus reach purpose to the emulation of microcomputer type relay protection logic testing signal system.Same, also can work out general branch, combined floodgate logical program to contactor.

Claims (3)

1. microcomputer type relay protection logic testing signal system analogue system; It comprises: comprehensive protector and be connected to the switch and the secondary circuit signal system thereof in loop with it; It is characterized in that; It also comprises signal power source, and it is with switch and secondary circuit signal system thereof and insert said comprehensive protector.

2. microcomputer type relay protection logic testing signal system analogue system according to claim 1; It is characterized in that; Said switch and secondary circuit signal system thereof comprise man-machine interactive system and the PLC that transmitted in both directions links together, and said man-machine interactive system has the template of signal circuit figure, control loop figure and high-voltage switch gear schematic diagram; Described PLC is used for analog switch combined floodgate logic and separating brake logical program, and the DI/DO signal of its input/output terminal and said comprehensive protector carries out transmitted in both directions and is connected.

3. microcomputer type relay protection logic testing signal system analogue system according to claim 2 is characterized in that said signal circuit figure template comprises the template of a major loop; Said control loop figure template comprises: the divide-shut brake circuit theory figure template of position, the test position of switch/operation schematic diagram template a, distant place/on the spot; Said high-voltage switch gear schematic diagram template comprises the allocation plan paper matrix plate of the digital input port (DI) of switch cubicle inside and extraneous signal and microcomputer type protective device; And divide circuit breaker and contactor to work out signal list for two kinds according to the characteristic of the position of switch in power supply-distribution system and institute charged gas equipment, each variable in each schematic diagram template is carried out signal configures and definition.

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