Research on Distributed Reactive Power Compensation Technology and Application of Bidirectional Converter in Rail Transit Power Supply System
In the construction of urban rail transit,such modes as setting reactive power compensation devices in the new main substation is generally adopted for reactive power compensation.The installation capacity of the compensation device at early stage shall not be too large due to such influence as installation site,environmental control ventilation and reactive power characteristics of power supply lines.In this paper,the principle and control strategy of decentralized reactive power compensation in bidirectional converter based on the system characteristics and application of high power controllable bidirectional converter are described and studied in combination with the system characteristics and application of high power bidirectional converter.The reactive power situation of rail transit power supply system is analyzed in combination with practical engineering cases and,at the same time,such aspects as feasibility and its system access as well as capacity selection of using bidirectional converter to disperse reactive power compensation are analyzed.The field test data shows that the bidirectional converter can compensate capacitive reactive power generated in the medium voltage network of subway power supply system and can be used as reference for the design of similar line.
reactive power compensationbidirectional converter devicedecentralized compensationcapacitive reactive power
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