基于功率注入法的UPFC潮流控制研究

目前对灵活交流输电系统技术 (FACTS)在稳态方面的作用缺乏深入的研究。采用基于功率注入法的统一潮流控制器 (U PFC)稳态模型 ,通过合理简化后 ,形象地分析了 U PFC在电力系统中的潮流控制特性 ,显示了功率注入法在 UPFC建模中的优越性。通过该模型 ,UPFC的潮流控制问题可以使用优化来解决 ,并可充分考虑系统中以及U PFC本身存在的约束条件。最后 ,用 IEEE的两个标准系统来研究 U PFC在提高线路传输功率中的作用。仿真结果表明 :UPFC对于区域性的运行目标具有强大的控制能力 ,特别适合长距离的互联传输系统。该结论可以为 U PFC的选址提供一定的参考

Power flow control characteristics of UPFC based on the power injected method

Further research is still needed for the steady state characteristics of flexible AC transmission systems (FACTS). A steady state model for the unified power flow controller (UPFC) based on the power injected method is introduced with several reasonable simplifications, and the control scope of the UPFC for power flow is displayed figuratively. With this model, the UPFC power flow control problem can be optimized including the constraints existing in the power system and the UPFC devices themselves. Two IEEE standard systems are studied with the line transmission power taken as the optimization object. The simulation results show that UPFC has excellent control ability in local power flow control, especially in long distance interconnected systems.