交直流互联系统节点PV曲线的求取

针对交直流互联系统电压稳定性的计算问题，给出了交直流互联系统各节点PV曲线的求取方法。该算法采用基于统一迭代法的连续潮流法，在临界点附近采取缩小步长的策略，可以精确求出整个PV曲线并得到精确临界点。研究了负荷和发电机出力的不同变化方式及各种直流控制方式对PV曲线的影响等问题，并做了系统实例计算。计算结果表明，文中提出的算法能快速完整地得到交直流互联系统PV曲线。

Seeking PV Curve of AC/DC Hybrid Power System

To calculate voltage stability of AC/DC hybrid power system, a method to seek PV curve at each node of AC/DC hybrid power system is presented. By use of continuation power flow method based on unified iteration, the step length around the critical point is reduced, so that whole PV curve and accurate critical point can be obtained. The impacts of different variations of load and generator output and various DC control modes on PV curve are researched. Results of calculation example show that using the proposed algorithm the PV curve of AC/DC hybrid power system can be obtained quickly and completely.