LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage
The renewable power gathering system often presents the characteristics of a weak AC grid. And the voltage fluctuates greatly during the failure process. The problem of renewable units being turned-off due to low voltage and transient overvoltage is prominent. This paper establishes the voltage-curr...
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State Grid Energy Research Institute
2022-02-01
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| Series: | Zhongguo dianli |
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| Online Access: | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202111041 |
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| author | Hui LIU Kuo WANG |
| author_facet | Hui LIU Kuo WANG |
| author_sort | Hui LIU |
| collection | DOAJ |
| description | The renewable power gathering system often presents the characteristics of a weak AC grid. And the voltage fluctuates greatly during the failure process. The problem of renewable units being turned-off due to low voltage and transient overvoltage is prominent. This paper establishes the voltage-current relationship of the renewable power gathering system. Considering the safety constraints of low voltage and transient overvoltage, we gives the LVRT reactive current index requirements for the renewable units through theoretical derivation. Then, the renewable power gathering system is classified according to the short circuit ratio (SCR), and for systems with different SCRs, differentiated LVRT reactive current index requirements are given. |
| format | Article |
| id | doaj-art-2d475d7644be42e7a8c6653ebaa25e02 |
| institution | DOAJ |
| issn | 1004-9649 |
| language | zho |
| publishDate | 2022-02-01 |
| publisher | State Grid Energy Research Institute |
| record_format | Article |
| series | Zhongguo dianli |
| spelling | doaj-art-2d475d7644be42e7a8c6653ebaa25e022025-08-20T02:47:49ZzhoState Grid Energy Research InstituteZhongguo dianli1004-96492022-02-0155215215810.11930/j.issn.1004-9649.202111041zgdl-55-3-liuhuiLVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient VoltageHui LIU0Kuo WANG1State Grid Jibei Electric Power Research Institute, Beijing 100045, ChinaPeking University, Beijing 100191, ChinaThe renewable power gathering system often presents the characteristics of a weak AC grid. And the voltage fluctuates greatly during the failure process. The problem of renewable units being turned-off due to low voltage and transient overvoltage is prominent. This paper establishes the voltage-current relationship of the renewable power gathering system. Considering the safety constraints of low voltage and transient overvoltage, we gives the LVRT reactive current index requirements for the renewable units through theoretical derivation. Then, the renewable power gathering system is classified according to the short circuit ratio (SCR), and for systems with different SCRs, differentiated LVRT reactive current index requirements are given.https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202111041renewable power gathering systemlow voltage ride throughtransient overvoltageshort-circuit ratio |
| spellingShingle | Hui LIU Kuo WANG LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage Zhongguo dianli renewable power gathering system low voltage ride through transient overvoltage short-circuit ratio |
| title | LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage |
| title_full | LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage |
| title_fullStr | LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage |
| title_full_unstemmed | LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage |
| title_short | LVRT Reactive Current Index of Renewable Units Based on the Constraints of Transient Voltage |
| title_sort | lvrt reactive current index of renewable units based on the constraints of transient voltage |
| topic | renewable power gathering system low voltage ride through transient overvoltage short-circuit ratio |
| url | https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202111041 |
| work_keys_str_mv | AT huiliu lvrtreactivecurrentindexofrenewableunitsbasedontheconstraintsoftransientvoltage AT kuowang lvrtreactivecurrentindexofrenewableunitsbasedontheconstraintsoftransientvoltage |