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电力大数据:2018,21(1):-
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110kV系统优化后备保护的研究
牛静,何进进
(贵州电网有限责任公司电力调度控制中心,贵阳市建筑设计院有限公司 贵州 贵阳)
110kV system optimized backup protection research
Niu Jing and He JinJin
(Guizhou ElectricSPowerSDispatch control center,Guiyang architectural design institute co LTD)
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投稿时间:2018-01-05    修订日期:2018-01-08
中文摘要: 继电保护的配置、选型与整定,应遵循“强化主保护、简化后备保护”的原则。随着电网建设加快,地区电网的规模日益扩大,现有的线路保护配置和整定原则难以适应目前工程建设的速度和运行方式的变化,还带来定值管理和执行难的问题。本文提出了110kV 线路保护简化配置和整定方案,充分考虑保护配置情况、系统的运行要求和设备的安全需求,通过强化主保护即配置双重化光纤电流差动保护,从而达到简化后备保护的目的即取消保护装置交流电压回路,取消距离保护功能、方向元件,以不带方向的两段或三段式零序过流保护和相间过流保护构成线路后备保护,有效地减轻了工作量并精简二次回路,提高整定计算的工作效率,对运行方式的安排也提高了灵活性。
Abstract:Configuration,selection and setting of the relay protection should follow the principle of enhancing primary protection and simplifying back -up protection.With speed up power grid construction, increasing the scale of district power grid,the existing line protection configuration and setting principle is difficult to adapt to the current engineering construction speed and the change of operation mode, the difficulty of setting value management and execution. 110 kV line protection is proposed in this paper to simplify the configuration and setting scheme, give full consideration to the protection configuration, system operation and equipment safety requirements, through strengthen the main protection configuration dual optical fiber current differential protection, so as to achieve the purpose of simplify backup protection is cancelled, the ac voltage circuit to cancel the distance protection function, direction element, with two or three without direction and zero sequence over current protection and over current protection circuit backup protection, effectively reduce the workload and reduce the secondary loop, improve the work efficiency of setting calculation, arrangements for operation mode also improves flexibility.
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