Flexible simulation test platform for electric power system transformer protection devices

Abstract

The invention discloses a flexible simulation test platform for electric power system transformer protection devices. The flexible simulation test platform comprises an RTDS (Real Time Digital Simulator) system and a power amplifier, wherein a transformer protection test system model constructed by the RTDS system comprises a primary system model, a failure setting subsystem model and a breaker control subsystem model; the failure setting subsystem model and the breaker control subsystem model are respectively connected with the primary system model; the failure setting subsystem model is used for providing failure signals; the breaker control subsystem model is used for providing tripping and closing signals; the primary system model is used for outputting electric capacity signals to a transformer protection device to be tested through the power amplifier; and the transformer protection device to be tested is used for feeding protection action signals back to the breaker control subsystem. According to the flexible simulation test platform, a uniform detection platform with favorable adaptability to the transformer protection products of different factories, different types and different principles is constructed; and through the platform, comprehensive and complete detection can be carried out on the transformer protection devices, and the operation of the detection of the transformer protection devices can be simplified and more standardized.

Description

technical field [0001] The invention relates to a simulation test platform, in particular to a flexible simulation test platform for a power system transformer protection device. Background technique [0002] The power transformer is an important electrical equipment in the power system, and its safe operation is related to whether the entire power system can work continuously and stably. With the continuous development of the national economy and the rapid growth of electricity demand, the rapid development of my country's electric power industry has realized the AC and DC interconnection of the national power grid, gradually developing from 220kV as the backbone grid structure to 500kV as the backbone grid structure. The high-voltage direct current transmission system has been completed and plays an important role in networking and power transmission. The series compensation line has been gradually used. The 750kV demonstration project has been completed and put into operat...

AI Technical Summary

Problems solved by technology

[0009] 1. The component model of the power system is single, and the parameter adjustment range is limited;

[0010] 2. The simulation scale is limited, the accuracy is not high, and the scalability and compatibility are poor;

[0011] 3. The construction investment is large and the cycle is long;

[0012] 4. It is inconvenient to build the model, and the detection of the transformer protection device is limited by the severity and duration of the simulated fault, so it is impossible to simulate a variety of complex and harsh working conditions

[0016] 1. The relay protection tester is an open-loop test, and the result of the protection action is not returned to the system, so it is impossible to assess the impact of the system disturbance on the protection device after the first action of the transformer protection;

[0017] 2. The function is simple, and it is difficult to simulate various complex faults and working conditions in the actual system;

[0018] 3. The test mode and data are relatively fixed, the parameter adjustment range is limited, and there is no flexibility

[0021] 1. Its test environment and test items are difficult to apply to transformer protection products of different manufacturers, different types, and different principles;

[0022] 2. The complete digital closed-loop test platform lacks systematicness, and it is difficult to form a complete detection system for comprehensive detection of transformer protection devices;

[0023] 3. The operability and standardization of transformer protection device detection are poor;

[0024] 4. For the simulation of some special working conditions such as system excitation inrush current, the simulation method and system parameters are relatively random and irreproducible, and many important parameters in special working conditions cannot be controlled, which is difficult to meet the requirements of transformer protection. Special requirements for device testing;

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