CN107508265B - 小电阻接地系统高阻接地保护方法和系统 - Google Patents
小电阻接地系统高阻接地保护方法和系统 Download PDFInfo
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- CN107508265B CN107508265B CN201710729658.XA CN201710729658A CN107508265B CN 107508265 B CN107508265 B CN 107508265B CN 201710729658 A CN201710729658 A CN 201710729658A CN 107508265 B CN107508265 B CN 107508265B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000007704 transition Effects 0.000 claims abstract description 29
- 230000007935 neutral effect Effects 0.000 claims description 20
- 238000002955 isolation Methods 0.000 claims description 4
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 238000004364 calculation method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
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- 101100499229 Mus musculus Dhrsx gene Proteins 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
R<sub>g</sub>(Ω) | 线路1 | 线路2 | 线路3 | 线路4 |
100 | 1.33e-3 | 4.21e-4 | 2.24e-3 | 4.81 |
200 | 3.74e-4 | 1.18e-4 | 6.27e-4 | 1.35 |
400 | 9.91e-5 | 3.13e-5 | 1.66e-4 | 0.358 |
600 | 4.49e-5 | 1.42e-5 | 7.54e-5 | 0.162 |
800 | 2.55e-5 | 8.05e-6 | 4.28e-5 | 0.0921 |
1000 | 1.64e-5 | 5.18e-6 | 2.76e-5 | 0.0592 |
R<sub>g</sub>(Ω) | 线路1 | 线路2 | 线路3 | 线路4 |
100 | 0.0248 | 0.0115 | 0.0608 | 3.31 |
200 | 7.11e-3 | 3.29e-3 | 0.0175 | 0.951 |
400 | 1.91e-3 | 8.84e-4 | 4.69e-3 | 0.255 |
600 | 8.70e-4 | 4.03e-4 | 2.13e-3 | 0.116 |
800 | 4.95e-4 | 2.29e-4 | 1.22e-3 | 0.0662 |
1000 | 3.19e-4 | 1.48e-4 | 7.83e-4 | 0.0427 |
R<sub>g</sub>(Ω) | 线路1 | 线路2 | 线路3 | 线路4 |
100 | 0.458 | 0.353 | 0.618 | 2.12 |
200 | 0.131 | 0.101 | 0.177 | 0.609 |
400 | 0.0353 | 0.0273 | 0.0477 | 0.164 |
600 | 0.0161 | 0.0124 | 0.0217 | 0.0745 |
800 | 9.15e-3 | 7.06e-3 | 0.0124 | 0.0424 |
1000 | 5.90e-3 | 4.55e-3 | 7.96e-3 | 0.0273 |
Claims (8)
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CN201710729658.XA CN107508265B (zh) | 2017-08-23 | 2017-08-23 | 小电阻接地系统高阻接地保护方法和系统 |
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CN107508265A CN107508265A (zh) | 2017-12-22 |
CN107508265B true CN107508265B (zh) | 2019-08-09 |
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Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108548986B (zh) * | 2018-06-01 | 2023-11-21 | 南京南瑞继保电气有限公司 | 一种小电流接地系统的高阻接地检测系统、装置及方法 |
CN109444657B (zh) * | 2018-10-23 | 2021-06-15 | 中国南方电网有限责任公司 | 一种配电网高阻接地故障区段定位方法 |
CN109728568B (zh) * | 2018-12-17 | 2020-11-27 | 广东电网有限责任公司广州供电局 | 小电阻接地系统高阻接地保护的启动方法和装置 |
CN111474494B (zh) * | 2020-03-20 | 2022-08-26 | 南京南瑞继保工程技术有限公司 | 一种小电阻接地系统的高阻接地故障检测方法、装置 |
CN113746069B (zh) * | 2020-05-28 | 2024-06-18 | 中国南方电网有限责任公司 | 一种接地变压器接地故障的保护方法 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103529316A (zh) * | 2013-08-15 | 2014-01-22 | 国家电网公司 | 一种电力系统高阻接地故障的综合检测方法 |
CN106980069A (zh) * | 2017-05-05 | 2017-07-25 | 国网山东省电力公司电力科学研究院 | 基于暂态电流投影系数差值比较的高阻接地故障定位方法 |
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- 2017-08-23 CN CN201710729658.XA patent/CN107508265B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103529316A (zh) * | 2013-08-15 | 2014-01-22 | 国家电网公司 | 一种电力系统高阻接地故障的综合检测方法 |
CN106980069A (zh) * | 2017-05-05 | 2017-07-25 | 国网山东省电力公司电力科学研究院 | 基于暂态电流投影系数差值比较的高阻接地故障定位方法 |
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Effective date of registration: 20190111 Address after: 510620 No. 2 Tianhe two road, Tianhe District, Guangzhou, Guangdong Applicant after: Guangzhou Power Supply Bureau Applicant after: Nanjing Nari-Relays Engineering Technology Co., Ltd. Address before: 510620 No. 2 Tianhe two road, Tianhe District, Guangzhou, Guangdong Applicant before: Guangzhou Power Supply Bureau Applicant before: Nanrui Relay Protection Electricity Co., Ltd., Nanjing |
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Effective date of registration: 20210401 Address after: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Patentee after: NR ENGINEERING Co.,Ltd. Address before: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. Patentee before: NR ENGINEERING Co.,Ltd. |