高速铁路电能质量调节装置低压试验模型研究

针对高速铁路牵引供电系统给电网带来的负序、谐波等电能质量问题,研制出一种高速铁路电能质量调节装置低压试验模型,深入研究了负序谐波补偿原理、试验模型主电路拓扑结构和控制方法。试验模型主电路由3个单相背靠背H桥构成,然后通过单相变压器接入牵引网。模型的一个交流侧采用定直流电压控制策略,另外一侧采用定有功功率输出控制策略,对所提出试验模型进行了仿真和试验研究。仿真和试验结果表明,所提出的主电路结构及控制方法是有效的,试验模型能够实现负序和谐波的综合补偿。

Research on Low-voltage Power Quality Conditioning Test Model for High Speed Railway

For the negative sequence and harmonics brought to the power grid by traction power supply system of high-speed railway,this paper develops a low-voltage test model for these power quality problem,and in-depth studies the principle of the negative sequence and harmonics compensation,the topology and control methods of the test model.The test model converter consists of three back-to-back single-phase H-bridges converter,and then access trac-tion system through single-phase transformer.One side of the converter uses fixed DC voltage control strategy and the other side uses fixed active power output control strategy.Simulation and experimental results showes that the proposed structure of the model and control methods are effective,the model achieves comprehensive compensation for negative sequence and harmonic.