基于动态潮流的非线性规划法求解电压稳定裕度  

Voltage stability margin's solution using nonlinear programming method based on dynamic power flow

作　　者：孙辉[1] 李峻[1] 胡姝博 周玮[1] 陈晓东 金晓明 刘淼 李春平 

机构地区：[1]大连理工大学电气工程学院,辽宁大连116024 [2]辽宁电力调度控制中心,辽宁沈阳110006 [3]大连市供电公司,辽宁大连116001

出　　处：《电力系统保护与控制》2014年第18期32-37,共6页Power System Protection and Control

基　　金：国家海洋局海洋可再生能源专项资金项目(GHME2011CL01);辽宁省博士启动基金计划(20121023);辽宁省电力有限公司2012年科技项目(2012YF-7)

摘　　要：电力系统电压稳定裕度是评估电力系统安全稳定性的重要指标。鉴于常规非线性规划法求解电压稳定裕度时,未计及负荷增长过程中各发电机组有功出力的增长方式,计算结果过于理想。结合动态潮流思想,提出一种考虑发电机有功出力增长方式约束的动态非线性规划法模型。在模型中,以结合实际选定的发电机有功出力增长方式来分担系统全部有功不平衡功率,使得利用动态非线性规划法求得的电力系统负荷裕度结果更加贴近实际,不受平衡点选择的影响。IEEE-30节点测试系统和辽宁电网实际系统的算例结果表明,利用动态非线性规划法计算的电力系统电压稳定裕度结果较常规非线性规划法更具合理性和实用性。Voltage stability margin is an important index to evaluate the security and stability of power system. In view that voltage stability margin＇s solution using normal nonlinear programming method does not consider the growth mode of generators＇ active power outputs, the results of load margin are too ideal. A dynamic nonlinear programming method model considering the growth mode of generators＇ active power outputs is proposed based on dynamic power flow. In the model, the unbalanced active power is distributed by the growth mode of generators＇ active power outputs which is based on the actual situation. So the results of load margin calculated by the dynamic nonlinear programming method are more practical and not affected by the selection of slack node. Tests on IEEE-30 system and Liaoning power system show that results of voltage stability margin calculated by dynamic nonlinear programming method are more reasonable and practical than normal nonlinear programming method.

关 键 词：电压稳定 非线性规划 动态潮流 负荷裕度 辽宁电网 

分 类 号：TM712[电气工程—电力系统及自动化]