文章摘要
王紫琪,和敬涵,张大海.双目标递进式断面过载保护控制协调优化策略[J].电力系统自动化. DOI: 10.7500/AEPS20180813004.
WANG Ziqi,HE Jinghan,ZHANG Dahai.Double-objective Progressive Coordinated Optimization Strategy for Protection and Control of Transmission Section Overload[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20180813004.
双目标递进式断面过载保护控制协调优化策略
Double-objective Progressive Coordinated Optimization Strategy for Protection and Control of Transmission Section Overload
DOI:10.7500/AEPS20180813004
关键词: 紧急控制  过负荷保护  输电断面  潮流追踪
KeyWords: emergency control  overload protection  transmission section  power flow tracing method
上网日期:2019-07-12
基金项目:国家重点研发计划
作者单位E-mail
王紫琪 北京交通大学 电气工程学院 jieziqiqiqi@qq.com 
和敬涵 北京交通大学 电气工程学院 jhhe@bjtu.edu.cn 
张大海 北京交通大学 电气工程学院 dhzhang1@bjtu.edu.cn 
摘要:
      输电断面过载易引发大规模连锁性事故。利用合理有效的保护控制措施降低断面功率输送压力,可以避免恶性事故的发生,对于电力系统的安全运行具有重要意义。针对输电断面过载问题,提出一种双目标递进式保护控制优化模型及相应的协调策略。将过负荷保护作为网络结构控制手段,与控制资源进行协调配合,以获得更优的断面过载调整效果。首先基于潮流追踪算法,剥离电力系统中的源荷输电路径。将源荷路径作为基本调整单元,引入过负荷保护动作量作为待优化参数,构建两层优化目标:以降低负荷损失量为第一层目标,以提高系统安全裕度为第二层目标,通过嵌套式寻优算法进行逐层求解。本文所提策略在潮流不越限基础上,优化发电机、负荷调整方式及过负荷保护动作变量。算例结果验证了该方法的有效性。
Abstract:
      Large-scale cascading accidents can be caused by overload of transmission section. Using reasonable and effective pro-tection and control measures to reduce the power pressure of transmission section can avoid the occurrence of malig-nant accidents, which has important sense to the safe operation of power system. Aiming at the overload of transmis-sion section, a double-objective progressive protection and control optimization model and the corresponding coordi-nation strategy are proposed in this paper. The overload protection can be used as a kind of mean to change network structure. It is cooperated with the emergency control resources to obtain a better adjustment effect. Firstly, based on the power flow tracking method, the source-load transmission paths in the power system are found. The source-load paths are taken as the basic adjustment units, and the operations of overload protections are introduced as adjustment parameters. Two-layer optimization objectives are constructed: reducing the load shedding amount is the objective in the first layer, and improving the security of the system is the objective in the second layer. The nested optimization algorithm is used to solve the problem gradually. On the premise of power within safety constraints, the strategy pro-posed in this paper can optimize the adjustments of generators and loads and the operation conditions of overload protections. Results of simulation can verify the effectiveness of the proposed method.
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