| 引用本文: | 詹 锦,陈 波,熊永新,等.利用调相机提升送端双馈风机高电压穿越能力的协调控制[J].电力系统保护与控制,2020,48(18):59-68.[点击复制] |
| ZHAN Jin,CHEN Bo,XIONG Yongxin,et al.Coordinated control for improving the HVRT capability of a DFIG wind farm using a synchronous condenser[J].Power System Protection and Control,2020,48(18):59-68[点击复制] |
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| 摘要: |
| 提出了一种利用同步调相机提升送端双馈风电场高电压穿越能力的无功协调控制策略，以避免风电场大规模脱网。大容量同步调相机由于其动态无功支撑和短时过载能力强，现已广泛应用于直流输电系统中，然而由于同步调相机的响应时间有限，其故障时无功出力会出现滞后。在分析了双馈风机和调相机的无功出力特性后，提出了一种无功协调控制策略。在部署同步调相机的同时，通过在故障暂态期间控制风电场参与无功调节，可以优化电网电压骤升期间的无功补偿。并在故障后稳态期间控制风电场退出无功调节，使得故障恢复后风电场能更快进入正常运行。在系统发生直流闭锁、小无功扰动或连续换相失败等故障下的仿真结果表明，协调控制方法可以在故障期间有效降低风机峰值端电压，加快系统电压恢复。 |
| 关键词: 高电压穿越 双馈风机 直流输电 同步调相机 协调控制 |
| DOI：DOI: 10.19783/j.cnki.pspc.191375 |
| 投稿时间：2019-11-04修订日期：2020-02-05 |
| 基金项目:国家自然科学基金项目资助(51577075)；国家电网江西省电力公司科技项目资助“江西电网二、三道防线的配置原则及协调控制技术研究” |
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| Coordinated control for improving the HVRT capability of a DFIG wind farm using a synchronous condenser |
| ZHAN Jin,CHEN Bo,XIONG Yongxin,CHENG Simeng,YAO Wei,TAO Xiang,WEN Jinyu |
| (1. School of Electric and Electronic Engineering, Huazhong University of Science and Technology (State Key
Laboratory of Advanced Electromagnetic Engineering and Technology), Wuhan 430074, China;
2. State Grid Jiangxi Electric Power Research Institute, Nanchang 330096, China) |
| Abstract: |
| This paper proposes a coordinated reactive power control strategy using a synchronous condenser to improve the High-Voltage Ride-Through (HVRT) ability of a Doubly-Fed Induction Generators (DFIG) wind farm and thus avoids tripping off of wind turbines. Because of its dynamic reactive power support and strong short-time overload capacity, the large capacity synchronous condenser has now been widely deployed in HVDC systems. However, the reactive power support of a synchronous condenser lags because of its response time limit when the grid fails. Based on the reactive power characteristics of a DFIG and synchronous condensers, a coordinated reactive power control strategy is proposed to optimize the reactive power flow during grid voltage swell. With the synchronous condenser deployed, the DFIG wind farm is controlled to participate in reactive power compensation during fault transients. The wind farm stops reactive power compensation during the steady-state period after a fault, so that the wind farm can enter normal operation more quickly after fault recovery. The simulation results in the case of DC-link block, small reactive power disturbance and continuous commutation failure show that the proposed strategy can effectively reduce the peak terminal voltage of wind turbines and accelerate system voltage recovery.
This work is supported by National Natural Science Foundation of China (No. 51577075) and Science and Technology Project of State Grid Jiangxi Electric Power Company “Research on Configuration Principles and Coordinated Control Technology of Second and Third Defense Lines in Jiangxi Power Grid”. |
| Key words: HVRT DFIG HVDC synchronous condenser coordinated control |
