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1.河海大学能源与电气学院,江苏省南京市 211100
2.国网辽宁省电力有限公司电力科学研究院,辽宁省沈阳市 110006
Received:14 July 2020,
Revised:2021-05-06,
Published Online:06 July 2021,
Published:10 October 2021
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俞文帅,黄蔓云,卫志农等.基于动态分区和多估计准则的电力系统自适应鲁棒状态估计[J].电力系统自动化,2021,45(19):173-180.
YU Wenshuai,HUANG Manyun,WEI Zhinong,et al.Adaptive Robust State Estimation for Power System Based on Dynamic Partitioning and Multiple Estimation Criteria[J].Automation of Electric Power Systems,2021,45(19):173-180.
俞文帅,黄蔓云,卫志农等.基于动态分区和多估计准则的电力系统自适应鲁棒状态估计[J].电力系统自动化,2021,45(19):173-180. DOI: 10.7500/AEPS20200714001.
YU Wenshuai,HUANG Manyun,WEI Zhinong,et al.Adaptive Robust State Estimation for Power System Based on Dynamic Partitioning and Multiple Estimation Criteria[J].Automation of Electric Power Systems,2021,45(19):173-180. DOI: 10.7500/AEPS20200714001.
随着当前智能电网技术的高速发展,电力系统的组成和运行方式愈发复杂,对状态估计的鲁棒性和实时性也产生了更高的需求。为此,提出一种基于动态分区和多估计准则的电力系统自适应鲁棒状态估计。通过模糊
c
均值聚类筛选出系统中的可疑量测集,进而根据可疑量测的空间分布实现系统动态分区。考虑到不同估计器各自的特点和适应性,针对可疑量测区域和正常量测区域自适应选取不同的估计准则,在保证估计精度的同时兼顾计算效率。为了保证边界节点信息和联络线传输功率的一致性,引入边界协调信息作为等式约束,并基于交替方向乘子法进行求解。通过IEEE标准系统进行测试,结果表明所提方法具有较好的估计精度和鲁棒性,并且其估计效率较加权最小绝对值估计法有明显提升。
With the rapid development of current smart grid technology
the composition and operation mode of power systems are becoming more and more complex
and higher demand for the robustness and real-time performance of the state estimation is also generated. An adaptive robust state estimation based on dynamic partitioning and multiple estimation criteria is proposed. It screens out the suspicious measurement by fuzzy
c
-means clustering
and then realizes the dynamic partition of the system according to the location of suspicious measurement. Considering the characteristics and adaptability of different estimators
different estimation criteria are adaptively selected for the suspicious and normal measurement regions to ensure the estimation accuracy and the calculation efficiency at the same time. In order to ensure the consistency of the boundary bus information and the power flow of the tie line
the boundary coordination information is introduced as equality constraints and solved by alternating direction method of multipliers. Numerical simulations in IEEE systems show that the proposed method has ideal estimation accuracy and robustness
and its estimation efficiency is significantly improved compared with weighted least absolute value estimation.
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