OLTC和OXL的动态特性对电力系统长期电压稳定性的影响研究  

作　　者：范海利[1] 卢志刚[1] 欧家祥 

机构地区：[1]贵州大学电气工程学院,贵州贵阳550003 [2]贵州电力试验研究院,贵州贵阳550003

出　　处：《中国西部科技》2011年第5期7-9,共3页Science and Technology of West China

摘　　要：在MATLAB/SIMULINK环境下,通过考虑慢动装置(有载分接头变压器OLTC、过励限制器OXL)的动态特性来研究一个简单电力系统长期动态电压稳定性。经过研究发现:对于某些干扰,系统可能不会遭遇短期电压稳定性问题,但是由于发电机过励限制器等的作用,却会遭遇长期电压稳定性问题。同时还发现:向负荷节点提供大量无功功率可以提高系统的长期和短期电压稳定极限。Under the MATLAB/SIMULINK environment,this paper investigated the long-term dynamic voltage stability of a simple power systemby considering the dynamic performance of slow-acting devices（on-load tap changer,over excitation limiter）. We observed that for some disturbances,the system may not face any voltage instability problem in short-term but it may suffer fromvoltage instability problem in long-term because of the activation of generator over excitation limiters.It was also observed that both the short-term and long-term voltage stability limits can be improved by providing adequate reactive power support at load buses.

关 键 词：长期电压稳定性 动态电压稳定性 电压崩溃 OXL OLTC 

分 类 号：TM712[电气工程—电力系统及自动化]