矿热炉混合无功补偿系统优化协调控制研究

为解决矿热炉给电网中其他用户带来的电能质量问题,尤其是电压跌落和电压闪变,提出了一种由FC、SVC和STATCOM组成的混合无功补偿系统。其中FC负责低层低成本无功补偿;SVC负责跟踪补偿无功功率变化,改善三相不平衡;STATCOM则通过快速响应来补偿SVC由于响应速度慢而导致的补偿误差,从而提高整个混合补偿系统的补偿精度。三者通过系统规则判断进行协调控制。对混合无功补偿系统进行仿真试验,分析对比了系统投入前后的电压波形,证明其补偿效果等效于等容量的STATCOM。

The Research of Optimization of Coordinated Control in Submerged Arc Furnace Mixed Reactive Power Compensation System

Voltage drop and voltage flicker caused by electric arc-furnace have been a major concern for customers in the field of power quality. To solve the problem, a mixed dynamic reactive power compensation system with fixed capacitors（FC）, static var compensator（SVC） and static synchronous compensator（STATCOM） is proposed. In the system, FC responsible for the reactive power compensation of the low cost,SVC responsible for the tracking changes of compensation of reactive power, which is to improve phase imbalance and STATCOM is used to compensate for the reactive power error of SVC and improve the accuracy of the compensation system of compensation. The three things is coordinated control by system rules judge. Test simulation for mixed reactive power compensation system, comparative analysis system into voltage waveforms before and after, which prove its compensation effect can be equivalent to the same volume of STATCOM.