引用本文: | 孙仲民,顾乔根,张晓宇,等.分接开关可控移相变压器保护配置及故障特征分析[J].电力系统保护与控制,2024,52(14):121-131.[点击复制] |
SUN Zhongmin,GU Qiaogen,ZHANG Xiaoyu,et al.Protection configuration and fault characteristics analysis of a tap-changercontrollable phase-shifting transformer[J].Power System Protection and Control,2024,52(14):121-131[点击复制] |
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摘要: |
移相变压器是一种经济型的潮流调节设备,可提高电网运行的安全性和经济性。为了实现分接开关可控移相变压器工程化应用,首先,针对电流电压互感器配置情况,提出了移相变压器的主保护配置方案,并分析了各保护元件的保护范围。其次,提出了基于控保协同的差动计算自适应调整策略,可根据分接开关的实时档位实现移相变压器差动保护计算的自适应调整。接着,给出了基于移相变压器差动平衡的各侧电流校验方法,可用于校验电流互感器的接入极性和参数。最后,通过仿真和实际波形,分析了不同故障下和空充时的波形特征以及保护的适应性,并证明了所提方法和保护配置的有效性。 |
关键词: 移相变压器 继电保护 差动保护 保护配置 故障特征 |
DOI:10.19783/j.cnki.pspc.240092 |
投稿时间:2024-01-11修订日期:2024-01-11 |
基金项目:国家重点研发计划项目资助(2021YFB2401000) |
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Protection configuration and fault characteristics analysis of a tap-changercontrollable phase-shifting transformer |
SUN Zhongmin,GU Qiaogen,ZHANG Xiaoyu,ZHENG Chao,MO Pinhao,WANG Bo |
(NR Electric Co., Ltd., Nanjing 211102, China) |
Abstract: |
The phase-shifting transformer is a piece of economical power flow regulation equipment. It can improve the safety and economy of power grid operation. To realize the engineering application of a tap-changer controllable phase-shifting transformer, first, a main protection configuration scheme of a phase-shifting transformer is proposed from the configuration of current and voltage transformers, and the protection range of each protection element is analyzed. Secondly, a differential adaptive adjustment strategy based on the coordination of control and protection devices is proposed. This can provide that the differential protection calculation of the phase-shifting transformer can be adjusted adaptively according to the real-time tap position of the tap-changer. Then, a current calibration method based on the differential balance of the phase-shifting transformer is presented. This can be used to verify the polarity and parameter of each current transformer. Finally, the waveform characteristics and the adaptability of protection with different fault types and no-load switch-on scenario are analyzed by simulation and real waveform, and the effectiveness of the proposed methods and protection configuration are proved. |
Key words: phase-shifting transformer relay protection differential protection protection configuration fault characteristics |