Synchronous Condenser’s Loss of Excitation and its Impact on the Performance of UHVDC
The synchronous condenser (SC) has a broad application prospect in ultra-high-voltage direct current (UHVDC) systems. The SC’s loss of excitation (LOE) is an important grid-related fault that may cause damage to the UHVDC. However, as the premise of the scientific protection configuration, knowledge...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2020-09-01
|
Series: | Energies |
Subjects: | |
Online Access: | https://www.mdpi.com/1996-1073/13/18/4926 |
id |
doaj-4815729be0e64a31ae71771ecf800d0c |
---|---|
record_format |
Article |
spelling |
doaj-4815729be0e64a31ae71771ecf800d0c2020-11-25T03:22:01ZengMDPI AGEnergies1996-10732020-09-01134926492610.3390/en13184926Synchronous Condenser’s Loss of Excitation and its Impact on the Performance of UHVDCZhilin Guo0Liangliang Hao1Junyong Wu2Xingguo Wang3Hong Cao4Guang Wang5School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China, 18117006@bjtu.edu.cn (Z.G.), wujy@bjtu.edu.cn (J.W.)School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China, 18117006@bjtu.edu.cn (Z.G.), wujy@bjtu.edu.cn (J.W.)School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China, 18117006@bjtu.edu.cn (Z.G.), wujy@bjtu.edu.cn (J.W.)State Key Laboratory for Power Grid Safety and Energy Conservation (China Electric Power Research Institute), Beijing 100192, ChinaState Key Laboratory for Power Grid Safety and Energy Conservation (China Electric Power Research Institute), Beijing 100192, ChinaNari Electric Co., Ltd., Nanjing 211102, ChinaThe synchronous condenser (SC) has a broad application prospect in ultra-high-voltage direct current (UHVDC) systems. The SC’s loss of excitation (LOE) is an important grid-related fault that may cause damage to the UHVDC. However, as the premise of the scientific protection configuration, knowledge of the SC’s LOE feature and its impact on UHVDC is still missing. This article first analyzes the SC’s LOE feature, offering a basic cognition of this fault. Secondly, the LOE SC’s reactive power response to system voltage variation is studied in the single-machine infinite-bus system. This lends a foundation for transient UHVDC research. Finally, the LOE SC’s impacts on steady and transient UHVDC are evaluated, respectively, considering different AC strengths and system faults through PSCAD/EMTDC (V4.6, Manitoba HVDC Research Center, Winnipeg, MB, Canada) simulations. The results show that: 1) LOE the SC absorbs reactive power while maintaining synchronous operation, its excitation current declines monotonically; 2) the LOE SC has an insignificant effect on steady-state UHVDC; 3) the LOE SC can restrain the overvoltage and benefit the rectifier’s transient stability; and 4) to reduce the inverter’s commutation failure, keeping LOE SC is more effective than separating it beforehand, while separating the LOE SC after the system voltage drop performs best. These conclusions could provide insights for the protection’s criterion and operation mode selections.https://www.mdpi.com/1996-1073/13/18/4926UHVDCdynamic reactive powersynchronous condenserloss of excitationcommutation failure |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhilin Guo Liangliang Hao Junyong Wu Xingguo Wang Hong Cao Guang Wang |
spellingShingle |
Zhilin Guo Liangliang Hao Junyong Wu Xingguo Wang Hong Cao Guang Wang Synchronous Condenser’s Loss of Excitation and its Impact on the Performance of UHVDC Energies UHVDC dynamic reactive power synchronous condenser loss of excitation commutation failure |
author_facet |
Zhilin Guo Liangliang Hao Junyong Wu Xingguo Wang Hong Cao Guang Wang |
author_sort |
Zhilin Guo |
title |
Synchronous Condenser’s Loss of Excitation and its Impact on the Performance of UHVDC |
title_short |
Synchronous Condenser’s Loss of Excitation and its Impact on the Performance of UHVDC |
title_full |
Synchronous Condenser’s Loss of Excitation and its Impact on the Performance of UHVDC |
title_fullStr |
Synchronous Condenser’s Loss of Excitation and its Impact on the Performance of UHVDC |
title_full_unstemmed |
Synchronous Condenser’s Loss of Excitation and its Impact on the Performance of UHVDC |
title_sort |
synchronous condenser’s loss of excitation and its impact on the performance of uhvdc |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2020-09-01 |
description |
The synchronous condenser (SC) has a broad application prospect in ultra-high-voltage direct current (UHVDC) systems. The SC’s loss of excitation (LOE) is an important grid-related fault that may cause damage to the UHVDC. However, as the premise of the scientific protection configuration, knowledge of the SC’s LOE feature and its impact on UHVDC is still missing. This article first analyzes the SC’s LOE feature, offering a basic cognition of this fault. Secondly, the LOE SC’s reactive power response to system voltage variation is studied in the single-machine infinite-bus system. This lends a foundation for transient UHVDC research. Finally, the LOE SC’s impacts on steady and transient UHVDC are evaluated, respectively, considering different AC strengths and system faults through PSCAD/EMTDC (V4.6, Manitoba HVDC Research Center, Winnipeg, MB, Canada) simulations. The results show that: 1) LOE the SC absorbs reactive power while maintaining synchronous operation, its excitation current declines monotonically; 2) the LOE SC has an insignificant effect on steady-state UHVDC; 3) the LOE SC can restrain the overvoltage and benefit the rectifier’s transient stability; and 4) to reduce the inverter’s commutation failure, keeping LOE SC is more effective than separating it beforehand, while separating the LOE SC after the system voltage drop performs best. These conclusions could provide insights for the protection’s criterion and operation mode selections. |
topic |
UHVDC dynamic reactive power synchronous condenser loss of excitation commutation failure |
url |
https://www.mdpi.com/1996-1073/13/18/4926 |
work_keys_str_mv |
AT zhilinguo synchronouscondenserslossofexcitationanditsimpactontheperformanceofuhvdc AT lianglianghao synchronouscondenserslossofexcitationanditsimpactontheperformanceofuhvdc AT junyongwu synchronouscondenserslossofexcitationanditsimpactontheperformanceofuhvdc AT xingguowang synchronouscondenserslossofexcitationanditsimpactontheperformanceofuhvdc AT hongcao synchronouscondenserslossofexcitationanditsimpactontheperformanceofuhvdc AT guangwang synchronouscondenserslossofexcitationanditsimpactontheperformanceofuhvdc |
_version_ |
1724611745012514816 |