IPC增强互联系统稳定性控制策略研究

基于相间功率控制器IPC(Interphase Power Contmller)互联系统，比较了保证电网互联的IPC同步策略。从暂态振荡能量函数角度分析了联络线功率振荡的机理．提出通过调节联络线功率不断削减互联系统暂态振荡能量．从而达到阻尼联络线振荡的IPC参数控制策略。设计了IPC自适应模糊控制器，选择联络线两端电压相位差与联络线功率作为控制信号．对增益系数进行自适应模糊调节。以4机双区域测试系统为例，分多种情况进行了暂态时域数值仿真。仿真结果表明：该控制器能够保证互联系统同步，并有效阻尼联络线功率振荡，联络线传输功率和关键节点电压等指标也可得到保证．

Enhancing stability of interconnected power system with IPC

The strategies of controllable IPC(Interphase Power Controller) to enhance the synchroni-zation of interconnection system are compared.The mechanism of tie-link power oscillation is ana-lyzed from the view of transient oscillation energy function.By regulating the tie-link power to mitigate the transient oscillation energy of interconnected system,the damping control strategy of IPC parameters is achieved.An adaptive fuzzy controller is designed,which selects the power and the phase difference of both ends of tie-link as control signals and deals with the gain coefficient in adaptive fuzzy regulation.With a four-machine two-area system as an example,the transient time -domain digital simulation is carried out under different conditions.Results show that the proposed controller makes the interconnected system synchronized and damps the tielink oscillation effectively,at the same time the transmission power through tie-link and voltages of key nodes are ensured.