摘要
提出了一种分级电压控制条件下静态电压稳定裕度的计算模型,所计算出的稳定裕度代表一次三次电压控制周期内系统由初始点到达临界点所能增加的最大负荷。该模型通过引入先导节点电压和区域无功水平的相关等式约束来反映分级电压控制作用,并引入互补约束来处理由发电机无功出力达到极限所引起的发电机节点与先导节点的节点类型转换问题。对该模型运用预测校正原对偶内点法求解,分别计算了IEEE39节点系统在三种负荷增长模式下实施分级电压控制前后的稳定裕度,并分析了实施分级电压控制的一种特定情况下临界点时系统各先导节点的状况,计算分析结果表明了该模型的合理性。
This paper proposes a novel model of static voltage stability margin calculation under hierarchical voltage control.This margin obtained represents the maximum loads increment from the base point to the critical point in a particular tertiary voltage control circle.The function of hierarchical voltage control is considered by introducing the equality constraints associated with pilot bus voltages and area reactive power levels to the model.Also,the complementarity constraints is introduced to handle the bus type transformation problem caused by generators reaching their reactive power limits.Furthermore,static voltage stability margins of IEEE 39-bus system in three loads ramping modes with and without hierarchical voltage control are solved respectively using predictor-corrector primal-dual interior point method,while the profiles of the pilot buses at the critical point corresponding to a particular situation under hierarchical voltage control are analysed.These results justify the rationality of the proposed model.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2011年第12期31-36,47,共7页
Power System Protection and Control
基金
国家自然科学基金项目(50777021)
中央高校基本科研业务费专项资金资助项目(2011ZM0021)~~
关键词
分级电压控制
电压稳定裕度
互补约束
非线性规划
hierarchical voltage control
voltage static stability margin
complementarity constraints
nonlinear programming
