CAJ | 학술논문

大规模风电并网改变了原来电网的潮流分布、线路传输功率以及电网故障时的暂态特性。将统一潮流控制器（UPFC）应用于异步风电机组并网的环形输电网络模型中，研究 UPFC 改善风电并网的性能。通过设计 UPFC 并联侧的双闭环反馈控制，设置风电输出线路三相短路故障来研究 UPFC 提高风电场低电压穿越能力。再建立 UPFC 串联侧有功与无功的独立控制系统，向输电线路输出补偿电压，研究其优化风电并网系统的潮流分布能力。在 Matlab/Simulink 软件中建立模型，仿真结果表明基于 UPFC 强大的无功补偿能力与潮流控制能力，UPFC 能够显著提高风电并网的低电压穿越能力和优化潮流分布。
대규모풍전병망개변료원래전망적조류분포、선로전수공솔이급전망고장시적잠태특성。장통일조류공제기（UPFC）응용우이보풍전궤조병망적배형수전망락모형중，연구 UPFC 개선풍전병망적성능。통과설계 UPFC 병련측적쌍폐배반궤공제，설치풍전수출선로삼상단로고장래연구 UPFC 제고풍전장저전압천월능력。재건립 UPFC 천련측유공여무공적독립공제계통，향수전선로수출보상전압，연구기우화풍전병망계통적조류분포능력。재 Matlab/Simulink 연건중건립모형，방진결과표명기우 UPFC 강대적무공보상능력여조류공제능력，UPFC 능구현저제고풍전병망적저전압천월능력화우화조류분포。
Large-scale wind power integration changes the power flow distribution, line transmission power and transient characteristics of the original power grid. This paper applies unified power flow controller (UPFC) to the wind farm interconnected to circular transmission network model and studies the performance of the wind power grid improved by UPFC. The double closed loop feedback control of UPFC shunt-side converter is used to improve the low voltage ride through capability during three phase short circuit fault of wind power output line. The active and reactive power independent control system of UPFC series-side converter is used to output offset voltage to transmission lines to study the power flow optimization of the wind power integration. The model is built by Matlab/Simulink and the simulation result verifies the improvement of the LVRT capability and the optimization of the power flow based on the reactive power compensation and power flow control ability of UPFC.