牵引变电所无功谐波综合补偿方案研究

针对牵引供电系统的特点,提出了一种利用混合补偿器进行牵引变电所无功和谐波综合补偿的新方案.混合补偿器由有源滤波器、无源滤波器及一种新型的可调无功补偿装置构成,其特点是有固定的滤波通道且初期投资较少.分析了该可调无功补偿装置的工作原理,讨论了谐波及无功电流检测方法与混合补偿器的控制策略.以某实际的牵引变电所为对象,利用MATLAB提供的Simulink仿真平台建立了仿真模型,仿真结果表明所提出的综合补偿方案有良好的无功、谐波补偿效果.

STRUCTURE OF HYBRID POWER FILTER FOR REACTIVE POWER AND HARMONIC CURRENTS IN TRACTION SUBSTATION

To compensate the harmonic current and reactive power of the traction substations, according to the specific property of traction supply system a novel structure of hybrid power filter is proposed. The hybrid power filter is composed of passive power filter, active power filter and switchable reactive power compensation device. The hybrid power filter has two features, it is a stationary harmonic filtering channel and has less initial investment. The working principle of the switchable reactive power compensation device is analyzed, the detecting method for harmonic current and reactive current is proposed and the control strategy of the hybrid power filter is given. A simulation model for a certain traction substation is established on the Simulink flat in MATLAB. The simulation results show that the performance in the compensation of harmonic current and reactive power of the proposed hybrid power filter is satisfactory.