引用本文: | 王紫琪,和敬涵,王小君,等.考虑温度因素的特高压并联电容器双桥差不平衡电流保护整定方法[J].电力系统保护与控制,2016,44(22):77-83.[点击复制] |
WANG Ziqi,HE Jinghan,WANG Xiaojun,et al.Double-bridge unbalance current protection setting method for EHV shunt capacitor banks considering temperature influence[J].Power System Protection and Control,2016,44(22):77-83[点击复制] |
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摘要: |
特高压并联电容器规模庞大,元件数量众多,各元件工作条件和工作环境存在明显差异。环境条件可改变电容器自身参数,进而影响桥差保护的可靠性与灵敏性。在现行双桥差不平衡电流保护的基础上,对温度因素的影响进行深入讨论。通过理论分析,得到考虑温度因素的不平衡电流值计算方法,并进行简化处理,制定出切实可行的保护整定方案。根据实际工程参数,利用PSCAD搭建仿真模型并对所提方法进行论证,具有理论价值和实际工程意义。 |
关键词: 外界因素 温度 内熔丝 双桥差不平衡电流保护 并联电容器组 整定计算 |
DOI:10.7667/PSPC151997 |
投稿时间:2015-11-14修订日期:2016-02-05 |
基金项目:国家自然科学基金项目(51277009) |
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Double-bridge unbalance current protection setting method for EHV shunt capacitor banks considering temperature influence |
WANG Ziqi,HE Jinghan,WANG Xiaojun,LUO Guomin |
(School of Electrical Engineering, Beijing Jiao Tong University, Beijing 100044, China) |
Abstract: |
There are a large number of capacitor units within a capacitor bank. The working environment is obvious different among these units. The capacitance values can be influenced by temperature, thus affecting the unbalance current protection’s reliability and sensitivity. The influence of temperature is discussed, which is based on double-bridge unbalance current protection. The theoretical analysis is carried out, and the calculation formula of the unbalance current due to temperature variation is obtained. The work in this paper also contains the simplification of the theory and practical protection setting scheme. The results are demonstrated by simulation with PSCAD. This method has important value both on theory and practical application. This work is supported by National Natural Science Foundation of China (No. 51277009). |
Key words: external factors temperature internal fuse double-bridge unbalance current protection shunt capacitor setting calculation |