Operation Characteristics and Security Control Measures of UHV Loop Network with Multi-Hierarchical DC Infeed after Breaking
The operation of a provincial UHV AC loop network provides conditions for hierarchical access and full power accommodation of multiple UHV DC systems, and also increases the coupling strength between UHV AC and UHV DC, and between 1000 kV/500 kV AC power grids at the receiving end. To ensure the rel...
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| Format: | Article |
| Language: | zho |
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State Grid Energy Research Institute
2020-10-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201909024 |
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| author | Shuaitao BAI Dezhi CHEN Shiying MA Qing DONG Wei TANG Ping JI Cheng YANG Xikai JIANG |
| author_facet | Shuaitao BAI Dezhi CHEN Shiying MA Qing DONG Wei TANG Ping JI Cheng YANG Xikai JIANG |
| author_sort | Shuaitao BAI |
| collection | DOAJ |
| description | The operation of a provincial UHV AC loop network provides conditions for hierarchical access and full power accommodation of multiple UHV DC systems, and also increases the coupling strength between UHV AC and UHV DC, and between 1000 kV/500 kV AC power grids at the receiving end. To ensure the reliable operation of UHV AC/DC power grids after line fault occurs, simulation is used to analyze the voltage stability characteristics of the coupled AC and DC systems after breaking of the 1000 kV UHV loop network, and the thermal stability characteristics of the power system when large power transfers to the 500 kV power grid after breaking, and the causes for voltage stability and thermo-stability problems are studied. In order to reduce the amount of security control measures, a unified multi-resource co-control optimization model is established for controlling the two operational problems, with consideration of the sensitivity and priority of multiple control methods such as DC modulation and load shedding. And a control-cost-based heuristic optimization method of constant-step gradient descent is proposed to obtain the co-control measures. It is verified through simulation of an actual power grid that the proposed controlling method can effectively reduce the amount of prevention and control measures. |
| format | Article |
| id | doaj-art-97a5f599d9954c3fbf0669f2e1c30b74 |
| institution | DOAJ |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2020-10-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-97a5f599d9954c3fbf0669f2e1c30b742025-08-20T02:59:19ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492020-10-01531020621410.11930/j.issn.1004-9649.201909024zgdl-53-7-baishuaitaoOperation Characteristics and Security Control Measures of UHV Loop Network with Multi-Hierarchical DC Infeed after BreakingShuaitao BAI0Dezhi CHEN1Shiying MA2Qing DONG3Wei TANG4Ping JI5Cheng YANG6Xikai JIANG7Electrical and Electronic Engineering College of North China Electric Power University, Baoding 071003, ChinaChina Electric Power Research Institute, Beijing 100192, ChinaChina Electric Power Research Institute, Beijing 100192, ChinaElectrical and Electronic Engineering College of North China Electric Power University, Baoding 071003, ChinaState Grid Anhui Electric Power Co., Ltd., Hefei 230061, ChinaChina Electric Power Research Institute, Beijing 100192, ChinaState Grid Anhui Electric Power Co., Ltd., Hefei 230061, ChinaState Grid Shenyang Electric Power Supply Company, Shenyang 110021, ChinaThe operation of a provincial UHV AC loop network provides conditions for hierarchical access and full power accommodation of multiple UHV DC systems, and also increases the coupling strength between UHV AC and UHV DC, and between 1000 kV/500 kV AC power grids at the receiving end. To ensure the reliable operation of UHV AC/DC power grids after line fault occurs, simulation is used to analyze the voltage stability characteristics of the coupled AC and DC systems after breaking of the 1000 kV UHV loop network, and the thermal stability characteristics of the power system when large power transfers to the 500 kV power grid after breaking, and the causes for voltage stability and thermo-stability problems are studied. In order to reduce the amount of security control measures, a unified multi-resource co-control optimization model is established for controlling the two operational problems, with consideration of the sensitivity and priority of multiple control methods such as DC modulation and load shedding. And a control-cost-based heuristic optimization method of constant-step gradient descent is proposed to obtain the co-control measures. It is verified through simulation of an actual power grid that the proposed controlling method can effectively reduce the amount of prevention and control measures.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201909024uhvacloop network structureuhvdcthermal stabilityvoltage stabilitycoupling characteristicscoordinated control |
| spellingShingle | Shuaitao BAI Dezhi CHEN Shiying MA Qing DONG Wei TANG Ping JI Cheng YANG Xikai JIANG Operation Characteristics and Security Control Measures of UHV Loop Network with Multi-Hierarchical DC Infeed after Breaking Zhongguo dianli uhvac loop network structure uhvdc thermal stability voltage stability coupling characteristics coordinated control |
| title | Operation Characteristics and Security Control Measures of UHV Loop Network with Multi-Hierarchical DC Infeed after Breaking |
| title_full | Operation Characteristics and Security Control Measures of UHV Loop Network with Multi-Hierarchical DC Infeed after Breaking |
| title_fullStr | Operation Characteristics and Security Control Measures of UHV Loop Network with Multi-Hierarchical DC Infeed after Breaking |
| title_full_unstemmed | Operation Characteristics and Security Control Measures of UHV Loop Network with Multi-Hierarchical DC Infeed after Breaking |
| title_short | Operation Characteristics and Security Control Measures of UHV Loop Network with Multi-Hierarchical DC Infeed after Breaking |
| title_sort | operation characteristics and security control measures of uhv loop network with multi hierarchical dc infeed after breaking |
| topic | uhvac loop network structure uhvdc thermal stability voltage stability coupling characteristics coordinated control |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.201909024 |
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