摘要
选取系统潮流雅可比矩阵的最小奇异值作为电力系统稳定裕度的相对量度，利用奇异值分解法分析与评价二级电压控制对电力系统稳定性的影响。对两机系统在负荷微增、接地短路故障以及重负荷微小扰动下分别进行了时域仿真，结果表明，二级电压控制通过重新配置区域无功，使系统结构得到一定改善，增大了潮流雅可比矩阵的最小奇异值，也即增加了系统的稳定裕度，从而提高了系统的稳定性。因此，二级电压控制是延缓电力系统电压崩溃的有效手段。
In this paper⒙the m inim um singular value of the load flow Jacobian m atrix is used as the com parative index ofstability m argin to analyze the effects of secondary voltage control ⒉ S V C⒕on the stability of a 2 generator system . Thesim ulation and analysis are carried out on the conditions of load increm ent⒙earth faults⒙and sm alldisturbances w ith a heavyload respectively. Sim ulation results show that secondary voltage controlcan enlarge the stability m argin of a pow er systemby increasing the m inim um singular value ofthe load flow Jacobian m atrix⒙and sequentially im prove the stability of the pow ersystem by rearranging the reactive pow er in the w hole region. It also show s that secondary voltage control is a feasiblem ethod to put offthe voltage collapse in pow er system s.
出处
《电力系统自动化》
EI
CSCD
北大核心
1999年第18期1-4,8,共5页
Automation of Electric Power Systems
关键词
电力系统
电压稳定
二级电压控制
奇异值分解法
pow er system s voltage stability secondary voltage control⒉ S V C⒕ m inim um singular value
