CN105092996A - EMTP (Electro-Magnetic Transient Program)-based relay protection tester compound fault real-time simulation system - Google Patents

Abstract

The invention aims at improving a relay protection tester simulation system. The improvement is based on applications and is carried out in a simulation system EMTP in power system electromagnetic transient analysis. According to the improvement method, an EMTP element model library is used for building a common power system fault model. A user only needs to select a circuit fault model in a relay protection tester upper computer operation interface, element parameters are inputted and confirmed, the protection tester simulation system automatically operates an embedded EMTP calculation module, data are generated and automatically converted into a comtrade-format standard file, and the comtrade-format standard file is sent to a lower computer. The improved simulation system can carry out real-time information transfer with the actual protection device, compound fault model simulation analysis which can not be completed by the traditional simulation system can be realized, and higher cost performance is achieved compared with RTDS.

Description

Based on the relay-protection tester combined failure real-time emulation system of EMTP

Technical field

The present invention relates to a kind of improving one's methods to relay-protection tester real-time emulation system, be mainly used in the EM transient calculation of relay-protection tester for electric power system fault situation.

Background technology

Traditional relay-protection tester emulation testing process can be divided into following seven steps:

One) test module is selected;

Two) protection feature parameter is defined;

Three) define method of testing, comprise variable, variation range, the test parameterss such as test failure type, add test event;

Four) hardware configuration editor wiring diagram is contrasted;

Five) test report needed for customization;

Six) open Parameter File at the scene, start executive routine;

Seven) generate test report, print filing.

Wherein, step 6,7 needs tester to complete at the scene.Whether program process, by the simulation calculation of host computer, is sent to slave computer by generation information by interface, by the action of slave computer feedback protection, and by result feedback to host computer, determine related data subsequent treatment.The simulation calculation principle of traditional relay protection tester host computer, based on manual calculations principle, can only carry out simple failed shorted calculating by formula, such as single-phase earthing, two phase ground, line to line fault and three phase short circuit fault.Be characterized in model and formula simply, be not suitable for compound electric power system fault and calculate.Such as, circuit two place short-circuit conditions simultaneously; One place short circuit simultaneously between place's open circuit conditions or transformer lock failure condition etc. all can not adopt traditional relay protection tester analogue system.

Summary of the invention

For solving the problems of the technologies described above, the invention provides a kind of improving one's methods to relay-protection tester real-time emulation system.

The present invention is that following technical scheme realizes: a kind of improving one's methods to relay-protection tester real-time emulation system, comprises the analogue system of use and improves one's methods.

The analogue system EMTP(Electro-MagneticTransientProgram of Electromagnetic Transient Analysis of Power System), relay-protection tester function software the analogue system used is:.

Improve one's methods for: utilize EMTP component models storehouse, build various common line fault model.By the rewriting under DOS environment, EMTP computing module is embedded in relay-protection tester analogue system.User only need select electric power system fault model under relay-protection tester operation interface; then input and confirm component parameters; relay-protection tester analogue system just runs the EMTP computing module of embedding automatically; generate data and be automatically converted to comtrade format standard file, delivering to slave computer.By the whether action of slave computer feedback protection, and by result feedback to host computer, determine related data subsequent treatment.

Data in file are exported with the form of comtrade standard format, is convenient to playback and utilizes other equipment to carry out automatic analysis, test, calculating and electric system simulation, or carry out the checking of protection scheme under fault, disturbed conditions.Also directly can form line fault waveform in plotter program and on other equipment, carry out reading and analyze.

Benefit of the present invention is: the analogue system after improvement can be carried out traditional relay protection tester and be emulated the imponderable composite electric system failure.Such as there is open circuit fault in circuit generation ground short circuit simultaneously.These combined failures because cannot extrapolate precise calculation, therefore cannot carry out accurate simulation calculating in traditional simulation system.But under improvement post-simulation system, only need find out corresponding failure model for fault, just can carry out simulation analysis to this fault.This analogue system is installed in the host computer of relay-protection tester, cooperatively interacts, realize the optimal design of relay-protection tester with the relay-protection tester slave computer after improving.

Analogue system after improvement has good real-time electromagnetic transient analysis ability, abundant electric system software library and more l-G simulation test type.It is exclusively used in reaying protection test, and is responsible for computing by PC, and the DSP of the RTDS that compares calculates does not exist node problems, therefore improves post-simulation system in real-time, has good guarantee.And although RTDS version is numerous, be not exclusively used in relay protection check test, and computing is relatively time-consuming, cost is higher.

Analogue system after improvement is special with reaying protection test simulation calculation, reduce the gap with RTDS, and price is obviously cheap relative to RTDS in relay protection test direction.The best price/performance ratio of relay-protection tester is realized in industrial applicibility.

Accompanying drawing explanation

The illustraton of model of C phase ground short circuit fault while that Fig. 1 being circuit generation A phase open circuit.

Embodiment

Below in conjunction with accompanying drawing and enforcement example, the present invention is further described.

As shown in Figure 1, circuit A phase open circuit C phase ground short circuit simultaneously.Simulation operations process is as follows:

One) user opens relay-protection tester Simulation System Interface, selects the electric power system fault model identical with physical fault.

Two) related elements parameter is inserted in a model according to electric system actual conditions and requirement.

Three) after confirming that parameter is correct, click OK button, analogue system can run the computing module based on EMTP program of embedded system inside automatically.

Four) simulation result is automatically converted to the output of comtrade standard format files.

Claims (1)

1. improving one's methods to relay-protection tester real-time emulation system, is characterized in that: comprise the analogue system of use and improve one's methods;

The analogue system EMTP(Electro-MagneticTransientProgram of Electromagnetic Transient Analysis of Power System), relay-protection tester function software the analogue system used is:;

The method of operating improved is:

One) user opens relay-protection tester Simulation System Interface, selects the electric power system fault model identical with physical fault;

Two) related elements parameter is inserted in a model according to electric system actual conditions and requirement;

Three) after confirming that parameter is correct, click OK button, analogue system can run the computing module based on EMTP program of embedded system inside automatically;

Four) simulation result is automatically converted to the output of comtrade standard format files.