混合电力系统送端暂态稳定分析及控制  

Analysis on Hybrid System's Transient Stability at Sending End and Its Control

作　　者：贺洋[1] 李兴源[1] 唐长春[2] 吴华坚[1] 

机构地区：[1]四川大学电气信息学院,成都610065 [2]四川省电力公司眉山公司,眉山620010

出　　处：《电力系统及其自动化学报》2009年第6期6-10,共5页Proceedings of the CSU-EPSA

基　　金：国家科技支撑计划项目(2008BAA13B01);国家自然科学基金资助项目(50877050)

摘　　要：采用故障临界切除时间为指标,对交直流混合系统的送端进行了暂态稳定性分析,并提出采用最优变目标的控制策略来提高其暂态稳定性。这种控制策略考虑了直流控制与其送端临近发电机励磁控制的协调,即首先将系统驱动到按最大稳定域选择的人工中间平衡点,然后再驱动系统到所希望的平衡点。通过NE-TOMAC对一个典型交直流并联系统进行数字仿真,结果表明这种控制可以较大增加故障临界切除时间,提高交直流互联系统的暂态稳定性。Some analysis focusing on the transient stability at the sending end of AC/DC hybrid system taking critical fault clearing time （tcr） as the inductoris are made and an Optimal Variable Aim Control （OVAC） strategy is proposed to improve its transient stability. This strategy considers coordinated between HVDC and its nearhy generator excitation control,which drives the system to artificial media equilibrium at first, and then the promising equilibrium. The simulation results of NETOMAC on a typical AC/DC parallel model show the proposed comtrol strategy can increase tcr and improve AC/DC hybrid system＇s transient stability.

关 键 词：混合电力系统 暂态稳定 故障临界切除时间 最优变目标控制 

分 类 号：TM743[电气工程—电力系统及自动化]