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为解决V/v牵引供电所功率因数低、负序及谐波含量大、电压波动大等问题,提出了一种由多重化背靠背双向变流器和非对称无源补偿滤波支路构成的低成本大容量动态综合补偿系统。有源部件实现两供电臂有功功率平衡和无功功率动态补偿,无源补偿滤波支路实现无功功率补偿和谐波治理。分析了系统非对称补偿原理,推导了容量设计方法,降低了有源部件容量和装置总成本。补偿功率给定值的综合优化计算能够减少系统损耗,提高装置长期运行能力。将该系统投入运行,对比分析投运前后电能质量参数,验证了所提方法的可行性和有效性。
In order to solve the problems of low power factor, negative sequence and harmonic content, large voltage fluctuation and so on in V / V traction power supply, a low back-to-back bi-directional converter and asymmetric passive compensation filter branch are proposed. Cost large-capacity dynamic integrated compensation system. The active component realizes the active power balance and the reactive power dynamic compensation of the two power supply arms, and the passive compensation filter branch realizes reactive power compensation and harmonic control. The principle of asymmetric compensation is analyzed, and the capacity design method is deduced, which can reduce the capacity of active components and the total cost of the device. The comprehensive optimization calculation of the compensation power setpoint can reduce the system loss and improve the long-term operation capability of the device. Putting the system into operation and comparing the power quality parameters before and after commissioning verify the feasibility and effectiveness of the proposed method.