Ground Fault Location of Large Generator and External Components
A fault location method is proposed to distinguish the ground faults of large generators and their external components. It divides the generator and its external components into four regions: the generator, the high-voltage winding of excitation transformer, the high voltage winding of unit auxiliar...
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| Format: | Article |
| Language: | zho |
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State Grid Energy Research Institute
2020-03-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201910051 |
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| author | Siteng ZHAO Lin GUI Qixue ZHANG Xiangheng WANG |
| author_facet | Siteng ZHAO Lin GUI Qixue ZHANG Xiangheng WANG |
| author_sort | Siteng ZHAO |
| collection | DOAJ |
| description | A fault location method is proposed to distinguish the ground faults of large generators and their external components. It divides the generator and its external components into four regions: the generator, the high-voltage winding of excitation transformer, the high voltage winding of unit auxiliary transformer, and the remaining external components. According to the zero-sequence direction discrimination principle, the exclusion method is used to check and determine the location of the fault. The key to this location method is to measure the zero-sequence current of generator terminal and high-voltage side of excitation transformer/unit auxiliary transformer. It’s necessary to select the TA according to different regions where the fault occurs. The location method was verified by a series of real fault cases, which proved that the method can accurately locate the ground fault of the generator and its external components, with shortened troubleshooting time and in-time power recovery of the generator. The proposed fault location method has the value of popularization and application. |
| format | Article |
| id | doaj-art-aaba84e2b10247fdb7ce50ca3433b3c7 |
| institution | OA Journals |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2020-03-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-aaba84e2b10247fdb7ce50ca3433b3c72025-08-20T02:06:21ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492020-03-0153311912510.11930/j.issn.1004-9649.201910051zgdl-53-4-zhaositengGround Fault Location of Large Generator and External ComponentsSiteng ZHAO0Lin GUI1Qixue ZHANG2Xiangheng WANG3State Key Laboratory of Control and Simulation of Power System and Generation Equipments (Department of Electrical Engineering, Tsinghua University), Beijing 100084, ChinaState Key Laboratory of Control and Simulation of Power System and Generation Equipments (Department of Electrical Engineering, Tsinghua University), Beijing 100084, ChinaNR Electric Co., Ltd., Nanjing 211102, ChinaState Key Laboratory of Control and Simulation of Power System and Generation Equipments (Department of Electrical Engineering, Tsinghua University), Beijing 100084, ChinaA fault location method is proposed to distinguish the ground faults of large generators and their external components. It divides the generator and its external components into four regions: the generator, the high-voltage winding of excitation transformer, the high voltage winding of unit auxiliary transformer, and the remaining external components. According to the zero-sequence direction discrimination principle, the exclusion method is used to check and determine the location of the fault. The key to this location method is to measure the zero-sequence current of generator terminal and high-voltage side of excitation transformer/unit auxiliary transformer. It’s necessary to select the TA according to different regions where the fault occurs. The location method was verified by a series of real fault cases, which proved that the method can accurately locate the ground fault of the generator and its external components, with shortened troubleshooting time and in-time power recovery of the generator. The proposed fault location method has the value of popularization and application.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201910051generator; external componentsground fault locationzero-sequence direction discriminationexclusion method |
| spellingShingle | Siteng ZHAO Lin GUI Qixue ZHANG Xiangheng WANG Ground Fault Location of Large Generator and External Components Zhongguo dianli generator; external components ground fault location zero-sequence direction discrimination exclusion method |
| title | Ground Fault Location of Large Generator and External Components |
| title_full | Ground Fault Location of Large Generator and External Components |
| title_fullStr | Ground Fault Location of Large Generator and External Components |
| title_full_unstemmed | Ground Fault Location of Large Generator and External Components |
| title_short | Ground Fault Location of Large Generator and External Components |
| title_sort | ground fault location of large generator and external components |
| topic | generator; external components ground fault location zero-sequence direction discrimination exclusion method |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201910051 |
| work_keys_str_mv | AT sitengzhao groundfaultlocationoflargegeneratorandexternalcomponents AT lingui groundfaultlocationoflargegeneratorandexternalcomponents AT qixuezhang groundfaultlocationoflargegeneratorandexternalcomponents AT xianghengwang groundfaultlocationoflargegeneratorandexternalcomponents |