| 引用本文: | 王茂海,齐霞.输电线路电阻参数误差对无功状态估计结果的影响分析[J].电力系统保护与控制,2015,43(23):143-147.[点击复制] |
| WANG Maohai,QI Xia.Analysis of transmission line resistance parameter’s impacts on reactive power estimation results[J].Power System Protection and Control,2015,43(23):143-147[点击复制] |
|
| 摘要: |
| 电力系统状态估计是调度自动化各项高级应用功能的基础，电网参数作为一种静态基础数据，其准确程度对状态估计结果有着持续的影响。针对调度运行单位在状态估计日常运行维护中经常出现的无功电压状态估计结果偏差的问题，详细分析了线路电阻参数对无功状态估计结果的影响。在其他参数不变的情况下，改变输电线路电阻的大小会改变线路两端的无功潮流分布，电阻值变化对线路两端无功潮流大小的影响数值相同，符号相反。给出了电网无功量测数据与状态估计结果相矛盾时的解决方向，并结合生产实际中的算例验证了分析结果的准确性。 |
| 关键词: 电网参数 状态估计 无功功率 |
| DOI：10.7667/j.issn.1674-3415.2015.23.022 |
| 投稿时间：2015-02-05 |
| 基金项目: |
|
| Analysis of transmission line resistance parameter’s impacts on reactive power estimation results |
| WANG Maohai,QI Xia |
| (North China Branch of State Grid Power Dispatch & Control Center, Beijing 100053, China;State Grid JIBEI Electric Economic Research Institute, Beijing 100005, China) |
| Abstract: |
| Power system state estimation is the basis of advanced power application functions. As static fundamental data, network parameters have a lasting impact on the credibility of state estimation results. Presently, experiences from daily state estimation maintenance show that, the accuracy of reactive power and voltage estimation results is usually worse than the accuracy of active power estimation results. Based on detailed analysis of transmission line resistance parameter’s impacts on reactive power estimation results, this paper points out that, if only resistance parameter is changed, transmission line’s reactive power injection of both sides should be changed with same amount in opposite direction. Furthermore, this paper proposes a solution when reactive power measurements contradict to the state estimation results. Examples in actual power system are given to demonstrate the accuracy of the analysis conclusion proposed by this paper. |
| Key words: power system parameters state estimation reactive power |
