Electric railway unbalance collaboration compensation method based on immune multi-agent system

Abstract

The invention discloses an electric railway unbalance collaboration compensation method based on an immune multi-agent system. The method includes the steps that when the degree of unbalance of a whole traction power supply network or a single traction station exceeds the standard, the three-phase power supply load condition is seen as an antigen, an RPC in a hybrid active negative sequence compensation system is seen as a T cell agent, an MCR type SVC in the hybrid active negative sequence compensation system is seen as a B cell agent, output values, capable of offsetting the antigen, of the T cell agent and the B cell agent are seen as antibodies, and eventually the antigen, corresponding antibody information and control parameters are stored to a knowledge base. By the adoption of the electric railway unbalance collaboration compensation method, the dynamic response speed of a whole device can be increased, the compensation capacity of equipment is reduced, manufacturing cost of the whole device is reduced, operating reliability of the whole device is improved, and the method has considerable market prospect in the field of electric railway electric energy quality comprehensive treatment.

Description

technical field [0001] The invention belongs to the technical field of electrified railway power quality, and in particular relates to a negative sequence unbalance cooperative compensation method for electrified railway traction substations based on an immune multi-agent system. Background technique [0002] With the rapid development of railway technology, electric traction locomotives are gradually replacing traditional diesel locomotives and becoming the development direction of railway traction technology due to their advantages of high horsepower, high speed, low energy consumption and high efficiency. As a special user of the power system, the electrified railway has the characteristics of "four non-" - nonlinearity (high-power rectifier equipment), non-sinusoidal (waveform distortion), asymmetry (single-phase high-power load), and non-linearity (single-phase high-power load). Continuity (serious impact of active and reactive power, large voltage fluctuation). Its ha...

AI Technical Summary

Problems solved by technology

At present, the conventional power quality management methods generally adopt the following methods for a single traction station: 1. Install a static var compensator SVC to compensate the negative sequence and reactive power problems of the system, but it cannot solve the harmonic problem, and needs Large compensation capacity

2. Add a new three-phase static synchronous compensator (distribution static synchronous compensator, DSTATCOM) to comprehensively compensate negative sequence, harmonics and reactive power, but the three-phase voltage is generally as high as 110 or 220 kV, which increases the engineering complexity Difficulty and Complexity

3. Install a railway power conditioner (Railway Power Conditioner, RPC) for comprehensive compensation, but it is an active device and the cost is relatively high

At the same time, these methods are all aimed at a single traction station, without considering the power quality of other stations and buses, and lack of a global view. However, this patent adopts the multi-station electromagnetic hybrid collaborative compensation based on the immune multi-agent model to overcome the existing electrification Insufficiency of railway negative sequence compensation method in terms of harmonics, input capacity, dynamic response speed, cost, etc.

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