110kv电力线路悬空绝缘状态的运行控制

E. Andreenkov, S. Shunaev, R. Solopov
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引用次数: 0

摘要

通过对110千伏输电线路的损坏统计和现行监管文件的分析,得出了现代综合设施中电网组织对悬空绝缘状态进行遥测监测的必要性。考虑选择改变绝缘子上的电压分布作为诊断准则,并以此为基础构建控制系统。阐述了对电压传感器的主要要求。考虑了基于电容分压器的电压传感器设计和参数的选择。利用悬挂式绝缘管柱的基本等效电路、拟定的传感器设计方案和沿管柱电场分布的数学模型,对传感器参数进行了计算。计算证实了通过改变沿绝缘子串的电压分布来记录链串中缺陷元件外观的可能性。在Multisim环境下的计算机模型上验证了计算结果。实验部分的工作代表了实验室测量的结果玻璃板绝缘子(PS-70E型)的电容,包括新的和损坏的。所得数据证实了计算中电容值的正确性。还建立了绝缘体电击穿时被破坏的玻璃片的晶粒尺寸、其电容和剩余电强度之间的相关性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Operational Control of the Suspended Insulations Condition of 110 kV Power Lines
Based on the damage statistics of 110 kV power transmission lines and the analysis of the current regulatory documentation, a conclusion is made about the need for electric grid organizations in a modern complex for telemetric monitoring of the suspended insulations condition. The choice of changing the voltage distribution on insulators as a diagnostic criterion is considered, on the basis of which the control system is being built. The main requirements for the voltage sensor are formulated. The choice of voltage sensors design and parameters a based on a capacitive divider using the existing component base is considered. The calculation of the sensor parameters was made using the basic equivalent circuit of the suspended insulation string, the developed design scheme of the sensor and mathematical models of the electrics field distribution along the string. Calculations confirm the possibility of registering the appearance of a defective element in a chain-string by changing the voltage distribution along the insulators string. The calculation results were verified on a computer model in the Multisim environment. The experimental part of the work represents the results of laboratory measurements of the glass plate insulators (type PS-70E) capacitances, both new and damaged. The data obtained confirm the correctness of the capacitance values adopted in the calculations. A correlation has also been established between the grain size of a glass piece destroyed during an electrical breakdown of an insulator, its capacitance and residual electrical strength.
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