基于节点电流注入法的UPFC潮流控制新方法研究

提出了一种基于节点电流注入法的改进的统一潮流控制器潮流控制的新方法:串联侧基于电流预测法实现对线路有功、无功功率的控制,并联侧用无功注入电流控制母线电压。利用电力系统综合程序(PSASP)的用户程序接口(UPI)功能,用C++语言编写了UPFC潮流控制模型的用户程序,与潮流程序交替求解,实现UPFC的控制功能。通过算例验证了该方法的正确性及有效性。所建模型无需改变UPFC两侧接入点的节点类型,控制灵活;基于节点电流注入法的思想对柔性交流输电系统控制器与其他商业软件的接口有借鉴意义。

Study on novel power flow control method of UPFC based on bus current-injection

A novel UPFC control method based on current-injection method is proposed. In the series side the active and reactive power control of the transmission line is realized based on current prediction, and the reactive injected current of the shunt side is used to control the bus voltage. Based on the user program interface (UPI) function of power system analysis software package (PSASP), the power flow control model of UPFC is established by user program, written in C++ language, which runs alternatively with load flow (LF) program in order to activate the control of UPFC. The accuracy and validity of the proposed model are verified through case-study. No change of the bus type is needed in the proposed model, which makes the control flexible. Furthermore, the concept of current injection is instructive for the access of flexible AC transmission system (FACTS) controllers to other business software.