基于无功补偿的电力弹簧有效运行范围分析

为了确保电力弹簧(Electric Spring, ES)工作在有效运行范围内,实现关键性负载电压稳定及电力供需平衡,结合相量图法对纯无功补偿的ES运行原理进行分析,获得了ES的有效运行范围,探讨了线路阻抗等参数对该范围的影响。针对现有扩大ES有效运行范围的方法需要引入有功补偿的情况,提出一种自适应调整关键性负载电压目标值的算法,仅需通过无功补偿就可以扩大ES的有效运行范围。详细分析了调整步长对网侧电压有效运行轨迹的影响。最后,通过在Simulink中建立仿真模型验证了分析结果及所提算法的正确性。

Analysis of the effective operating range of electric spring based on reactive power compensation

In order to ensure the Electric Spring (ES) works within the effective operating range to achieve critical load voltage stability and power balance between supply and demand, the operating principle of ES for pure reactive power compensation is analyzed with the vector diagram method, the effective operating range of ES is obtained, and the effects of line impedance and other parameters on the range are discussed. An algorithm for adaptively adjusting the critical load voltage target value is proposed since expanding the effective operation range need to introduce active power compensation in existing methods. This algorithm can expand the effective operation range of ES only by reactive power compensation. The effect of the adjustment step length on the effective operation locus of line voltage is analyzed in detail. Finally, the simulation model in Simulink is established to validate the analysis results and the proposed algorithm. This work is supported by National Natural Science Foundation of China (No. 51467012).