To ensure the safe,reliable and economic operation of high-speed railway,a multi-dimensional control method for the power supply operation energy of high-speed railway cophase power supply system is proposed. The composition structure and power supply process of the power supply system are analyzed,and a power flow controller is used to compensate the power of the system,thus ensuring its stable operation. Combined with indicators such as three-phase imbalance degree and distortion of voltage and current waveforms,the optimal load model of operation energy is constructed to minimize the loss of transmission energy. Through the active and reactive power compensation for current in two power supply arms,the negative-sequence current is eliminated. A control strategy for the railway power conditioner is formulated,and the changes in the step-down transformer are obtained to ensure a stable DC-side voltage. Afterwards,a proportional integral controller is used to obtain the ideal value of current and get the control signal,thus realizing the multi-dimensional control of power supply operation energy. Simulation results show that the proposed multi-dimensional control method can improve the three-phase current balance degree and achieve an effect of voltage sharing stability.
关键词
高速铁路/同相供电系统/运行能量/多维控制/铁路功率调节器
Key words
High-speed railway/cophase power supply system/operation energy/multi-dimensional control/railway power conditioner(RPC)
维普
万方数据