文章摘要
刘皓明,任秋业,张占奎,等.双馈风机等效惯性时间常数计算及转差率反馈惯量控制策略[J].电力系统自动化. DOI: 10.7500/AEPS20171009001.
LIU Haoming,REN Qiuye,ZHANG Zhankui, et al.Calculation of Equivalent Inertia Time Constant of Doubly-fed Induction Generators and Slip-feedback Inertia Control Strategy[J].Automation of Electric Power Systems. DOI: 10.7500/AEPS20171009001.
双馈风机等效惯性时间常数计算及转差率反馈惯量控制策略
Calculation of Equivalent Inertia Time Constant of Doubly-fed Induction Generators and Slip-feedback Inertia Control Strategy
DOI:10.7500/AEPS20171009001
关键词: 双馈风电机组  惯量控制  等效惯性时间常数  转差率反馈
KeyWords: doubly-fed induction generators  inertia control  equivalent inertia time constant  slip feedback
上网日期:2018-08-07
基金项目:新能源与储能运行控制国家重点实验室开放基金资助项目(NYB51201700672);国家自然科学基金资助项目(51607058);中央高校基本科研业务费专项资金资助项目(2016B07014)。
作者单位E-mail
刘皓明 河海大学 能源与电气学院 liuhaom@hhu.edu.cn 
任秋业 河海大学 能源与电气学院 rqystep@163.com 
张占奎 中国电力科学研究院新能源与储能运行控制国家重点实验室 zkzhang@epri.sgcc.com.cn 
李琰 中国电力科学研究院新能源与储能运行控制国家重点实验室 liyan@epri.sgcc.com.cn 
许波峰 河海大学 能源与电气学院 bfxu1985@hhu.edu.cn 
摘要:
      通过对并网的双馈风电机组实施惯量控制可以使其在电网频率变化时提供有功功率短时支撑,以改善电网频率偏差。在分析双馈风电机组的数学模型及其控制策略的基础上,建立了含惯量控制的双馈风电机组的简化数学模型,通过计算等效惯性时间常数,对双馈风电机组惯量响应能力进行定量表征,提出将转差率控制应用于矢量控制框架的基于转差率反馈的双馈风电机组惯量控制方法。基于DIgSILENT搭建仿真模型,仿真对比分析表明转差率反馈惯量控制环节能够在电网负荷波动时减小频率偏差,且转速恢复快,不造成频率的二次跌落。
Abstract:
      Gird frequency deviation can be improved through short-term frequency support from grid connected doubly-fed induction generators (DFIGs) with inertia control. Based on the analysis of mathematical model and control strategy of DFIG, a simplified model of DFIG incorporating the inertia control is developed. Through the quantitative definition of equivalent inertia time constant, the ability of wind turbines to provide inertial response can be evaluated. Considering applying the slip control strategy to control rotor electromagnetic torque in the vector control frame, the slip-feedback inertia control strategy which uses generator slip as a control variable, is put forward and is verified on DIgSILENT. Simulation results show that the proposed strategy can significantly reduce the frequency deviation caused by load fluctuation, with the advantage of accelerating the speed of recovering and mitigating the adverse impact of speed recovery on gird frequency.
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