Adaptive current differential protection for active distribution networks accommodating high levels of PV integration
The large-scale integration of photovoltaic （PV） sources into distribution networks alters the differential current and braking current of line differential protection， leading to a risk of maloperation in traditional ratio restraint differential protection. This study analyzes the changes in the fu...
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| Format: | Article |
| Language: | zho |
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zhejiang electric power
2025-01-01
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| Series: | Zhejiang dianli |
| Subjects: | |
| Online Access: | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=49bd86b4-b8a1-41c5-b353-ea738b004836 |
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| _version_ | 1823857065000435712 |
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| author | CHEN Shuiyao XU Feng PAN Wulue LI Yuehui WU Jizeng LIU Sumei |
| author_facet | CHEN Shuiyao XU Feng PAN Wulue LI Yuehui WU Jizeng LIU Sumei |
| author_sort | CHEN Shuiyao |
| collection | DOAJ |
| description | The large-scale integration of photovoltaic （PV） sources into distribution networks alters the differential current and braking current of line differential protection， leading to a risk of maloperation in traditional ratio restraint differential protection. This study analyzes the changes in the fundamental-frequency current amplitude and phase angle on both sides of the line connected to the PV source， highlighting the subsequent issues with traditional current differential protection. By deriving the mathematical relationship between the ratio restraint coefficient and the phase angles of the currents on either side， as reflected in the critical operation curve of differential protection， the paper proposes an improved adaptive current differential protection criterion for adjusting the ratio restraint coefficient. A simulation model of distribution networks with PV stations is developed using PSCAD/EMTDC to test the proposed protection strategy， demonstrating its effectiveness and reliability under high levels of PV integration. |
| format | Article |
| id | doaj-art-6d1aded8dc4b49228e9d3709cf497225 |
| institution | Kabale University |
| issn | 1007-1881 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | zhejiang electric power |
| record_format | Article |
| series | Zhejiang dianli |
| spelling | doaj-art-6d1aded8dc4b49228e9d3709cf4972252025-02-12T00:54:58Zzhozhejiang electric powerZhejiang dianli1007-18812025-01-01441344310.19585/j.zjdl.2025010041007-1881（2025）01-0034-10Adaptive current differential protection for active distribution networks accommodating high levels of PV integrationCHEN Shuiyao0XU Feng1PAN Wulue2LI Yuehui3WU Jizeng4LIU Sumei5State Grid Zhejiang Electric Power Co.， Ltd.， Hangzhou 310007， ChinaState Grid Jinhua Power Supply Company， Jinhua， Zhejiang 321000， ChinaState Grid Zhejiang Electric Power Co.， Ltd.， Hangzhou 310007， ChinaState Grid Jinhua Power Supply Company， Jinhua， Zhejiang 321000， ChinaBeijing Forestry University， Beijing 100083， ChinaBeijing Forestry University， Beijing 100083， ChinaThe large-scale integration of photovoltaic （PV） sources into distribution networks alters the differential current and braking current of line differential protection， leading to a risk of maloperation in traditional ratio restraint differential protection. This study analyzes the changes in the fundamental-frequency current amplitude and phase angle on both sides of the line connected to the PV source， highlighting the subsequent issues with traditional current differential protection. By deriving the mathematical relationship between the ratio restraint coefficient and the phase angles of the currents on either side， as reflected in the critical operation curve of differential protection， the paper proposes an improved adaptive current differential protection criterion for adjusting the ratio restraint coefficient. A simulation model of distribution networks with PV stations is developed using PSCAD/EMTDC to test the proposed protection strategy， demonstrating its effectiveness and reliability under high levels of PV integration.https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=49bd86b4-b8a1-41c5-b353-ea738b004836adaptive current differential protectionratio restraint coefficientprotection adaptabilityhigh levels of pv station integrationline protection |
| spellingShingle | CHEN Shuiyao XU Feng PAN Wulue LI Yuehui WU Jizeng LIU Sumei Adaptive current differential protection for active distribution networks accommodating high levels of PV integration Zhejiang dianli adaptive current differential protection ratio restraint coefficient protection adaptability high levels of pv station integration line protection |
| title | Adaptive current differential protection for active distribution networks accommodating high levels of PV integration |
| title_full | Adaptive current differential protection for active distribution networks accommodating high levels of PV integration |
| title_fullStr | Adaptive current differential protection for active distribution networks accommodating high levels of PV integration |
| title_full_unstemmed | Adaptive current differential protection for active distribution networks accommodating high levels of PV integration |
| title_short | Adaptive current differential protection for active distribution networks accommodating high levels of PV integration |
| title_sort | adaptive current differential protection for active distribution networks accommodating high levels of pv integration |
| topic | adaptive current differential protection ratio restraint coefficient protection adaptability high levels of pv station integration line protection |
| url | https://zjdl.cbpt.cnki.net/WKE3/WebPublication/paperDigest.aspx?paperID=49bd86b4-b8a1-41c5-b353-ea738b004836 |
| work_keys_str_mv | AT chenshuiyao adaptivecurrentdifferentialprotectionforactivedistributionnetworksaccommodatinghighlevelsofpvintegration AT xufeng adaptivecurrentdifferentialprotectionforactivedistributionnetworksaccommodatinghighlevelsofpvintegration AT panwulue adaptivecurrentdifferentialprotectionforactivedistributionnetworksaccommodatinghighlevelsofpvintegration AT liyuehui adaptivecurrentdifferentialprotectionforactivedistributionnetworksaccommodatinghighlevelsofpvintegration AT wujizeng adaptivecurrentdifferentialprotectionforactivedistributionnetworksaccommodatinghighlevelsofpvintegration AT liusumei adaptivecurrentdifferentialprotectionforactivedistributionnetworksaccommodatinghighlevelsofpvintegration |