兼具STATCOM功能的混合型直流融冰电源

Hybrid Ice-melting Power Supply with STATCOM Function

针对融冰电源性价比较低、装置使用具有较强周期性的问题,提出了一种兼具静止同步补偿器(STATCOM)功能的混合型大功率直流融冰电源。在对拓扑工作原理及拓扑工作切换过程进行分析的基础上,推导了STATCOM和直流融冰两种应用工况下,功率单元和系统主电路的等效电路和数学模型。对STATCOM和直流融冰两种工作模式下的调制策略、单元工作模式及其控制方法进行了研究与分析,提出了一种模块均衡控制方法。仿真和试验结果表明,所提出的混合型大功率直流融冰电源具有较好的直流融冰和无功补偿效果。仿真和试验与分析结果一致,验证了拓扑结构和控制方法的正确性。

In light of the lower performance-price ratio of the ice-melting device and the relatively strong periodicity in its application, a hybrid high power DC ice-melting source with static synchronous compensator （STATCOM） function is put forward. Based on analysis of topology operation principle and operation switching process, the equivalent circuit and mathematical model of power unit and main circuit are deduced on the condition of STATCOM and DC ice-melting application. Modulation strategy, unit operation mode and control method are studied under STATCOM and DC ice melting mode, and a new way for the unit balance is given. Simulation and test results show that this hybrid high power DC ice-melting source has better reactive power compensation and DC ice-melting effects. Consistent with the analysis, the results also verify the correctness of topology and control method.