| 引用本文: | 张伟晨,熊永新,李程昊,等.基于改进VDCOL的多馈入直流系统连续换相失败抑制及协调恢复[J].电力系统保护与控制,2020,48(13):63-72.[点击复制] |
| ZHANG Weichen,XIONG Yongxin,LI Chenghao,et al.Continuous commutation failure suppression and coordinated recovery of multi-infeed DC system based on improved VDCOL[J].Power System Protection and Control,2020,48(13):63-72[点击复制] |
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| 摘要: |
| 为提高特高压直流多馈入系统连续换相失败抑制及恢复能力，分析了直流控制系统模块中低压限流环节(Voltage Dependent Current Order Limiter, VDCOL)的交流电压和直流电压这两种输入方式对于不同系统故障的控制效果。针对两种不同输入方式的VDCOL各自的优势，提出了一种改进的VDCOL模块。该模块通过设计合理的输入信号转换控制策略可有效抑制多馈入直流系统连续换相失败并提升其协调恢复速度。以某实际电网的特高压直流多馈入系统为例进行仿真研究，基于PSCAD/EMTDC仿真结果表明，所提方法可有效减少逆变阀组的连续换相失败次数、缩短系统故障恢复时间。 |
| 关键词: 特高压直流输电 直流多馈入系统 换相失败 VDCOL 协调恢复 |
| DOI：10.19783/j.cnki.pspc.190895 |
| 投稿时间：2019-07-25修订日期：2019-09-18 |
| 基金项目:国家自然科学基金项目资助(51577075);国家电网有限公司科技项目资助“电化学储能电站群在特高压交直流混联受端电网应用关键技术研究及示范” |
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| Continuous commutation failure suppression and coordinated recovery of multi-infeed DC system based on improved VDCOL |
| ZHANG Weichen,XIONG Yongxin,LI Chenghao,YAO Wei,WEN Jinyu,GAO Dongxue |
| (State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;Electric Power Research Institute of State Grid Henan Electric Power Company, Zhengzhou 450052, China;State Grid Hunan Electric Power Company, Zhengzhou 450000, China) |
| Abstract: |
| In order to improve the continuous commutation failure suppression and recovery capability of a UHV DC multi-feed system, this paper analyzes the two input methods of AC voltage and DC voltage of Voltage Dependent Current Limit Order (VDCOL) in a DC control system module on the control effects for different system failures. Given the advantages of VDCOL with two different input modes, an improved VDCOL module is proposed. By designing a reasonable input signal conversion control strategy, the module effectively suppresses the continuous commutation failure of a multi-infeed DC system and improves its coordinated recovery speed. Taking the UHV DC multi-feed system of an actual power grid as an example, the simulation results in PSCAD/EMTDC show that the proposed method can effectively reduce the number of consecutive commutation failures and shorten the system failure recovery time of the inverter valve group. This work is supported by National Natural Science Foundation of China (No. 51577075) and Science and Technology Project of State Grid Corporation of China “Application Key Technologies and Demonstration of Electrochemical Energy Storage Power Station Group in UHV AC/DC Hybrid Receiving-end Power Grid”. |
| Key words: UHVDC DC multi-infeed system commutation failure VDCOL coordinated recovery |
