中国电机工程学报Issue(34)：6021-6031,11.DOI:10.13334/j.0258-8013.pcsee.2014.34.002
提高电力系统惯性水平的风电场和VSC-HVDC协同控制策略
Coordinated Control of Wind Farms and VSC-HVDC to Improve Inertia Level of Power System
摘要
Abstract
Based on the technical solution of large-scale offshore wind farm integrating into onshore grid by voltage source converter based HVDC (VSC-HVDC) transmission, this paper proposed a new coordinated control strategy. The strategy used electrical energy stored in HVDC capacitors and kinetic energy stored in wind turbine generator rotors to emulate the inertia of the synchronous generator (SG). The HVDC link capacitors released or absorbed energy by the proposed droop DC voltage control of the grid side VSC (GSVSC). No remote communication was needed since the artificial coupling of the frequency of the two-side AC systems was obtained through the variable frequency control of the wind farm VSC (WFVSC). The rotor speed of the wind turbine generator changed with the power reference of its power controller in response to the frequency change of the WFVSC. As a result, the wind turbine generators were utilized to keep the grid frequency stable. Within the permissible variations of the wind turbine generator rotor speed and the DC voltage, the proposed coordinated control strategy can provide a wide range of inertia time constants, which improves the overall stability of the system. Simulation results of three operation conditions, i.e. sudden load changes, variations of wind speeds, and AC system faults, validate the effectiveness of the proposed control strategy.关键词
风电机组/风电场/柔性直流输电/双馈感应发电机/惯量模拟/频率调节Key words
wind turbine generator/wind farm/voltage source converter based HVDC (VSC-HVDC)/doubly fed induction generator/inertia emulation/frequency regulation分类
信息技术与安全科学引用本文复制引用
李宇骏,杨勇,李颖毅,刘高任,徐政..提高电力系统惯性水平的风电场和VSC-HVDC协同控制策略[J].中国电机工程学报,2014,(34):6021-6031,11.基金项目
国家高技术研究发展计划项目(863计划)(2012AA051704)；国网浙江省电力公司重点科技项目(ZDAVC-13011)。The National High Technology Research and Development of China (863 Program)(2012AA051704) （863计划）
Key Project of Zhejiang Provincial Electric Power Company (ZDAVC-13011) （ZDAVC-13011）
