强地磁暴期间超、特高压交流电网主导节点电压设定值校正方法  被引量:1

Correction for Voltage Setting Value of Pilot Node in EHV and UHV AC Power Grid During Strong Geomagnetic Storm

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作  者:辛文凯 刘春明[2] 王泽忠[1] 李宇妍 XIN Wenkai;LIU Chunming;WANG Zezhong;LI Yuyan(Beijing Key Laboratory of High Voltage and EMC(North China Electric Power University),Changping District,Beijing 102206,China;School of Electrical and Electronic Engineering,North China Electric Power University,Changping District,Beijing 102206,China)

机构地区:[1]高电压与电磁兼容北京市重点实验室(华北电力大学),北京市昌平区102206 [2]华北电力大学电气与电子工程学院,北京市昌平区102206

出  处:《电网技术》2023年第10期4284-4290,共7页Power System Technology

基  金:国家自然科学基金项目(52177081)。

摘  要:当电网遭受地磁暴侵害时,电网中感生的地磁感应电流(geomagnetically induced current,GIC)会使变压器铁心偏磁饱和,变压器无功损耗增大,引发整个电网的无功不足与电压波动。超、特高压电网由于其特殊的电气特性更容易受到地磁暴的侵害,群发性、突发性的无功扰动易使电网电压跌落至不合格区间。针对这种情况,在确定超、特高压电网主导节点电压设定值时,须考虑地磁暴衍生的无功扰动对系统电压的影响。通过分析地磁暴期间电压波动的机理和模拟电网对强地磁暴的响应,该文提出了强地磁暴期间超、特高压电网主导节点电压设定值和电压控制区域校正方法。该研究适用于强地磁暴期间超、特高压电网电压控制,保证在遭受地磁暴侵害情况下各电压等级电网电压仍可保持在合格区间。When the power grid is impacted by geomagnetic storms,the geomagnetic induced current(GIC)in the power grid may saturate the transformers core,increasing the transformer’s reactive power loss and causing the reactive power shortage and the voltage fluctuation of the whole power grid.The extra-high voltage(EHV)and the ultra-high voltage(UHV)power grids are proved to be more vulnerable to such geomagnetic storms due to their special electrical characteristics.The mass and sudden reactive power disturbances may drop the power grid voltage to some unqualified range.In view of this situation,the influence of the reactive power disturbance derived from the geomagnetic storm on the system voltage should be investigated when determining the voltage setting value of the pilot node in the EHV and the UHV power grids.By analyzing the mechanism of the voltage fluctuation during the geomagnetic storm and simulating the response of the power grid to the strong geomagnetic storm,a method is proposed in this paper to correct the voltage setting value and control area during the strong geomagnetic storms.This method is applicable to the voltage control of the EHV and the UHV power grids.It ensures that the voltage at each voltage level of the system is in the qualified range in the case of strong geomagnetic storms.

关 键 词:地磁暴 地磁感应电流 主导节点 电压校正 电压控制区域 

分 类 号:TM721[电气工程—电力系统及自动化]

 

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