摘要
本文主要研究电力系统发生低频振荡后的实时稳定性控制,分析了计及随机性的情况下概率阻尼比分布的变化,在半不变量法的基础上推导了计算方法。基于概率阻尼比以及阻尼比灵敏度,对控制措施进行量化,以确定最优控制措施,包括控制选址和控制量的确定。在两区四机系统中进行了仿真,验证了实时修正控制的有效性,与传统低频振荡控制措施相比,所提出的方法考虑了随机性,并且对控制措施进行了量化。这种方法能有效抑制系统的振荡模态。
The main research of this paper is the real-time stability of the system with low frequency oscillation in power system. This paper analyzes the change of the probability distribution of the damping ratio in the case of the randomness, and the calculation method is derived. Based on probability damping ratio and damping ratio sensitivity, control measures have been quantified, in order to determining the optimal control measures, which include control location and amount. The simulation was carried out in two area four machine system, in which the validity of the real time correction control is verified. The method proposed in this paper can effectively suppress the oscillation mode of the system, in which the randomness is considered compared with traditional control measures.
出处
《电气技术》
2017年第2期25-30,共6页
Electrical Engineering
基金
国家自然科学基金项目(51277029)
关键词
半不变量法
概率分析
低频振荡
阻尼比灵敏度
cumulant
probability analysis
low frequency oscillation
characteristic root sensitivity
