Electromagnetic hybrid device and method for synergetic compensation of high-speed railway multi-station electric energy quality

Abstract

The invention discloses an electromagnetic hybrid device and a method for synergetic compensation of the high-speed railway multi-station electric energy quality. Active power three-phase transfer of a multi-station traction power supply system is achieved by the aid of an RPC (railway power conditioner), reactive power of designated capacity is outputted for compensation, bus negative sequence components are further reduced with power factor guaranteed, and an MSVC (magnetic-control static var compensator) outputs reactive power to compensate residual bus negative sequence current. By the aid of multi-station synergetic optimum compensation and RPC power transfer characteristics, installed capacity of the MSVC is effectively saved, local dynamic response speed is increased, manufacture cost of the whole device are reduced, and running reliability of the whole device is improved. The device and the method can be used for compensating the electric energy quality of the electrified railway traction power supply system and particularly used for negative sequence compensation, reactive compensation and harmonic wave filtering, and have good application prospect on the occasions that high-speed railways are extremely unbalanced in load.

Description

technical field [0001] The invention belongs to the technical field of power quality analysis and control of electrified railways, and in particular relates to an electromagnetic hybrid high-speed railway multi-site power quality collaborative compensation device and method. Background technique [0002] Electrified railway has become one of the transportation modes that my country has focused on in recent years due to its advantages of high passenger capacity, large transportation capacity, high speed, safety and energy saving. From the perspective of the operating characteristics of electrified railway locomotives, they can be divided into two categories: conventional electrified railway locomotives and high-speed railway locomotives. Among them, the conventional electrified railway locomotive mainly adopts the AC-direct transmission mode. Our country has relatively mature research in this technical field, but the power of the DC motor is proportional to the volume, which ...

AI Technical Summary

Problems solved by technology

[0005] 1) The dynamic response is poor, and the dynamic response of the TCR SVC device cannot meet the rapidly changing load requirements of high-speed railway locomotives;

[0006] 2) The harmonic content is large, and the harmonic content of the TCR type SVC device is very large, which can reach 15%, and the low-order harmonic content is relatively large, which has a great impact on the high-speed railway power supply system;

[0007] 3) The TCR type SVC device occupies a large area, has high noise, high cost and large loss

However, due to the limited capacity of power electronic devices, complex manufacturing process, and expensive device cost, it is obviously unrealistic to use RPC to compensate for the huge locomotive load of high-speed railways.

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