摘要
基于轨迹的凹凸性几何特征分析可知,不稳定的相轨迹斜率随角度逐步变大,欲使不稳定的轨迹向稳定的轨迹变化,施加的控制需要满足轨迹的斜率在功率平衡点前持续变小。据此提出了一种基于切机时刻相轨迹斜率和功率平衡点角度的最小切机量近似计算方法,并且给出了根据实测信息计算等值功率平衡点的近似计算方法。以单机无穷大系统和某联网电网系统为例,验证了理论的有效性。
The geometric analysis of trajectory convexity shows the slope of unstable phase trajectory increases gradually along with the angle. In order to stabilize the unstable trajectory,its slope should be controlled to become continuously smaller before the power balance point. A method is proposed to approximately calculate the minimum control quantity based on the phase trajectory slope of control point and the angle of power balance point. The equivalent power balance point is calculated approximately based on the measurements. A single machine infinite bus system and an interconnected system are taken as the examples to verify the validity of the introduced theory.
出处
《电力自动化设备》
EI
CSCD
北大核心
2014年第12期1-5,共5页
Electric Power Automation Equipment
基金
国家电网公司大电网重大专项资助项目课题(SGCCMPLG030-2012)~~
关键词
电力系统
暂态
稳定性
相轨迹凹凸性
相轨迹斜率
控制量
闭环控制
electric power systems
transients
stability
phase trajectory convexity
phase trajectory slope
control quantity
closed-loop control