Offshore wind farms integration and frequency support control utilizing hybrid multi-terminal HVDC transmission
Offshore wind farms integration and frequency support control utilizing hybrid multi-terminal HVDC transmission
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DOI：
10.1109/ias.2013.6682484
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发表时间：
2013-12
期刊：
影响因子：
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通讯作者：
Chenghao Li;P. Zhan;J. Wen;M. Yao;Naihu Li;Weijen Lee
中科院分区：
文献类型：
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作者：
Chenghao Li;P. Zhan;J. Wen;M. Yao;Naihu Li;Weijen Lee
本文提出了一种混合多端高压直流输电（MTDC）系统，将多个分布式海上风电场整合到陆上电网。并设计了陆上电网综合频率支持算法。描述了典型4终端系统的配置和操作原理。针对风电场侧VSC（WFVSC）和电网侧LCC（GSLCC）提出了系统控制策略。为了获得平稳运行，WFVSC被控制为电压源，自动吸收风电场产生的电力，并为风力涡轮机建立稳定的交流电压。直流电压电流下垂控制专为 GSLCC 设计，用于维持直流电压并在两个陆上电网之间分配电力。设计并测试了一种无需辅助电源的市电黑启动过程。 PSCAD/EMTDC 中的仿真结果展示了陆上电网黑启动、换流器断开和频率变化期间的系统性能。
This paper proposed a hybrid multi-terminal HVDC (MTDC) system to integrate several distributed offshore wind farms to onshore power grids. And a comprehensive frequency support algorithm for onshore grid was designed. The configuration and operation principles of a typical 4 terminals system are described. A system control strategies are proposed for both wind farm side VSCs (WFVSCs) and grid side LCCs (GSLCCs). To obtain smooth operation, the WFVSCs are controlled as a voltage source that automatically absorbs power generated by the wind farm and establish a stable AC voltage for wind turbines. DC voltage-current droop control is designed for GSLCCs to maintain the DC voltage and distribute power between two onshore girds. A utility black start-up process without auxiliary power supply was designed and tested. The simulation results in PSCAD/EMTDC were presented to demonstrate the system performance during black starting-up, converter disconnection and frequency variation of one onshore power grid.