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分析了煤矿供电系统中无功和谐波电流带来的危害,设计出基于动态无功补偿装置STATCOM的补偿方案,在传统的基于瞬时功率的补偿电流检测方法的基础上,提出了基于基波正序电压检波器的p-q检测法,此种方法能在电网不平衡、畸变等恶劣情况下快速、准确地检测出负载侧的谐波和无功电流分量,电流跟踪采用滞环比较控制,有效地解决了煤矿供电系统复杂的问题。
The harm of reactive power and harmonic current in coal mine power supply system is analyzed and a compensation scheme based on STATCOM is designed. Based on the traditional detection method of instantaneous power compensation current, Positive sequence voltage detector pq detection method, this method can quickly and accurately detect the load side of the harmonic and reactive current components in the power grid imbalance, distortion and other adverse conditions, the current tracking control using hysteresis, effective To solve the complex problem of coal mine power supply system.