中国电机工程学报2018，Vol.38Issue(9)：2561-2570,10.DOI:10.13334/j.0258-8013.pcsee.171161
考虑线路温度的电网状态估计方法
An Algorithm for Power System State Estimation Considering Line Temperature
于学良 1张恒旭 1王孟夏1
作者信息
- 1. 电网智能化调度与控制教育部重点实验室(山东大学),山东省 济南市 250061
- 折叠
摘要
Abstract
The accuracy of transmission line parameters has a great influence on power system state estimation results. Based on the theory of electro-thermal coupling, a two-step state estimation algorithm was proposed by integrating the heat balance equation into the conventional state estimation model. The correction of the line resistance according to line temperature was considered in the proposed algorithm. The algorithm used the inner loop to modify electrical quantity, and the outer loop to correct line temperature and resistance, which can achieve more precise estimation results of electrical quantity and line temperatures. Furthermore, heat balance equation was introduced as the pseudo measurement and line temperature was introduced into the state vector. Joint state estimation model considering line temperature was established. Partial deviation of SCADA and PMU measurements to line temperature was derived and pseudo measurements were solved with a larger weight. The validity and efficiency of the proposed algorithm are verified by IEEE 14-bus, 39-bus and 118-bus case. The simulation results show that the estimation error is obviously decreased with the proposed model.关键词
状态估计/热平衡方程/电热关联/线路温度/线路参数Key words
state estimation/heat balance equation/electro-thermal coupling/line temperature/line parameters分类
信息技术与安全科学引用本文复制引用
于学良,张恒旭,王孟夏..考虑线路温度的电网状态估计方法[J].中国电机工程学报,2018,38(9):2561-2570,10.
