| 引用本文: | 舒展,张伟晨,王光,等.特高压直流接入江西电网后的故障影响分析及其应对措施[J].电力系统保护与控制,2019,47(20):163-170.[点击复制] |
| SHU Zhan,ZHANG Weichen,WANG Guang,et al.Fault analysis and its countermeasures of Jiangxi Provincial Grid after UHVDC line connection[J].Power System Protection and Control,2019,47(20):163-170[点击复制] |
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| 摘要: |
| 江西电网计划于2020年建成首条±800 kV特高压直流输电工程，西南电网大容量清洁能源将通过特高压直流输入江西电网，同时江西受端系统安全稳定性将面临挑战。为研究受端系统故障对交直流混联系统暂态稳定性的影响，提出了一套离线仿真的分析方法。该方法涵盖了交直流混联系统可能存在的换相失败、闭锁以及连续换相失败后闭锁的运行风险分析，并基于分析结果提出相应的安全控制措施。以雅中—江西±800 kV特高压直流输电工程为例，分析了直流阀直接闭锁和连续换相失败后闭锁两类故障，对比两类故障对江西电网安全稳定运行造成的影响，提出了配套的应对措施。仿真研究表明，所提评估分析方法能有效指导电网运行与控制，所提安全稳定控制措施能有效提高电力系统应对紧急事故的能力。 |
| 关键词: 特高压直流输电 直流闭锁 换相失败 安控措施 |
| DOI：10.19783/j.cnki.pspc.181459 |
| 投稿时间：2018-11-21修订日期：2019-02-20 |
| 基金项目:国家自然科学基金项目资助(51577075) |
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| Fault analysis and its countermeasures of Jiangxi Provincial Grid after UHVDC line connection |
| SHU Zhan,ZHANG Weichen,WANG Guang,XIONG Yongxin,YAO Wei,WEN Jinyu,YANG Yue,TAO Xiang |
| (Electric Power Research Institute of State Grid Jiangxi Electric Power Company, Nanchang 330096, China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology, Wuhan 430074, China;State Grid Jiangxi Electric Power Co., Ltd., Nanchang 330096, China) |
| Abstract: |
| The first ±800 kV UHVDC transmission project of Jiangxi Power Grid is planning to be built in 2020. The large scale of renewable energy in Southwest China will be input into Jiangxi Power Grid through UHVDC, thus, the safety and stability of Jiangxi Power Grid will face challenges. In order to study the influence of receiving side AC system’s fault on the transient stability of AC/DC hybrid system, this paper proposes an offline simulation analysis method, which covers the influence analysis of possible commutation failure, blocking and continuous commutation failure of AC/DC hybrid system. Moreover, the appropriate safety and stability control measures are proposed based on the analysis. Taking the Yazhong-Jiangxi ±800 kV UHVDC transmission project as an example, the two types of faults of DC valve direct locking and continuous commutation failure are analyzed. The effects of two types of faults on the safe and stable operation of Jiangxi Power Grid are compared. The corresponding response measures are proposed. Simulation results show that the proposed method in this paper can effectively guide the operation and control of the power grid, and the proposed safety and stability control measures can effectively improve the ability of the power system to respond to emergencies. This work is supported by National Natural Science Foundation of China (No. 51577075). |
| Key words: HVDC DC blocking commutation failure security measures |
