引用本文:杜治,苏 宇,彭昌勇,等.基于多层次启发式动态规划算法的电力系统动态等值[J].电力系统保护与控制,2016,44(17):1-9.
DU Zhi,SU Yu,PENG Changyong,et al.Dynamic equivalent of power system based on global representation heuristic dynamic programming algorithm[J].Power System Protection and Control,2016,44(17):1-9
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基于多层次启发式动态规划算法的电力系统动态等值
杜治1,苏 宇2,彭昌勇1,姚 伟2,徐敬友1,刘 巨2,文劲宇2
(1.国网湖北省电力公司经济技术研究院，湖北 武汉 430077;
2..强电磁工程与新技术国家重点实验室(华中科技大学)，湖北 武汉 430074)
摘要:
针对电力系统运行工况变化后动态等值系统响应精度不够的问题，提出一种基于多层次启发式动态规划(Global representation heuristic dynamic programming，GrHDP)算法的动态等值方法。该方法在基于同调等值得到的模型的基础上，在等值边界上加入基于GrHDP算法的动态补偿环节，实时补偿同调等值系统与原系统间动态特性的差额，从而实现精确跟踪原系统的动态特性。以10机39节点系统为例进行仿真研究，结果表明:在不同运行工况、故障方式和故障地点下，基于所提算法的动态等值系统相比传统的同调等值能更精确地跟踪原系统的动态特性。
关键词:  电力系统  动态等值  同调等值法  多层次启发式动态规划  动态特性
DOI：10.7667/PSPC151627
分类号:
基金项目:国家自然科学基金项目(51529701)
Dynamic equivalent of power system based on global representation heuristic dynamic programming algorithm
DU Zhi1,SU Yu2,PENG Changyong1,YAO Wei2,XU Jingyou1,LIU Ju2,WEN Jinyu2
(1. State Grid HBEPC Economic &Technology Research Institute, Wuhan 430077, China;
;2. State Key Laboratory of Advanced Electromagnetic Engineering and Technology
(Huazhong University of Science and Technology), Wuhan 430074, China)
Abstract:
To solve the problem of insufficient response accuracy for dynamic equivalence system after power system operating conditions change, this paper proposes a global representation heuristic dynamic programming (GrHDP)-based dynamic equivalence method. Based on the model obtained by coherency equivalents method, a dynamic compensation block based on GrHDP is added to the boundary of the equivalent model, which can compensate the dynamic response difference between the equivalent system and the original system. Therefore, it can accurately track the original system dynamic characteristics. Case study is undertaken on a 10-machine 39-bus power system. Simulation results show that the equivalent model obtained by proposed dynamic equivalence method can more accurately track the original system dynamic characteristics than that obtained by the coherency equivalents method under different operating conditions and fault locations. This work is supported by National Natural Science Foundation of China (No. 51529701).
Key words:  power system  dynamic equivalents  coherency equivalents method  GrHDP  dynamic characteristic
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