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,2019,43(19):140-148. DOI: 10.7500/AEPS20180813004.
WANG Ziqi,HE Jinghan,ZHANG Dahai.Bi-objective Progressive Coordinated Optimization Strategy for Protection and Control of Transmission Section Overload[J].Automation of Electric Power Systems,2019,43(19):140-148. DOI: 10.7500/AEPS20180813004.
双目标递进式断面过载保护控制协调优化策略
Bi-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  协调优化
KeyWords: emergency control  overload protection  transmission section  power flow tracking  coordinated optimization
上网日期:2019-07-12
基金项目:国家重点研发计划资助项目(2016YFB0900600)
作者单位E-mail
王紫琪 北京交通大学电气工程学院, 北京市 100044  
和敬涵 北京交通大学电气工程学院, 北京市 100044  
张大海 北京交通大学电气工程学院, 北京市 100044 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。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 the overload of transmission sections. The occurrence of malignant accidents can be avoided by using reasonable and effective protection and control measures to reduce the power pressure of transmission section, which is important to the safe operation of power system. Aiming at the overload of transmission section, a bi-objective progressive protection and control optimization model and the corresponding coordination strategy are proposed. The overload protection can be used as a control method to change the network structure. It is cooperated with the emergency control resources to obtain a better adjustment effect for the transmission section overload. Firstly, based on the power flow tracking method, the source-load transmission paths in power system are found. By taking source-load paths as the basic adjustment units, the operation conditions of overload protection are introduced as parameters to be optimized. Two-layer optimization objectives are constructed, i. e. reducing the load shedding amount is the objective on the first layer, and improving the security of the system is the objective on the second layer. The nested optimization algorithm is used to solve the problem layer by layer. On the premise of power within safety constraints, the proposed strategy can optimize the adjustment of generators and loads, and the operation conditions of overload protection. Effectiveness of the proposed method is verified by the simulation results.
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