双馈风电场的次同步振荡分析与抑制
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摘要
针对现有的风电串补系统次同步振荡的抑制措施缺乏对次同步振荡的机理研究以及参数的动态优化,物理意义大都不太明确且抑制效果受到了很大的局限性,本文建立了双馈风机串补并网系统的模型,通过数学推导详细分析了风机次同步振荡的机理并通过时域仿真分析了次同步振荡的影响因素。在此基础上,通过在转子侧附加基于遗传粒子群算法进行参数寻优的改进阻尼控制器抑制双馈风机串补并网的次同步振荡。时域仿真结果表明:与固定参数的抑制方法相比,此方法对风电串补系统的次同步振荡抑制效果更好。
In view of the lack of the mechanism of subsynchronous oscillation and the dynamic optimization of the parameter,most of the existing suppression measures for SSO of the wind power series compensation system lack the clear physical meaning and the inhibition effect has been greatly limited.In this paper,the model of DFIG connected to the grid by series compensation is established.Besides,through mathematical deduction,the mechanism of SSO is analyzed in detail,and the influencing factors are analyzed through time domain simulation.Based on that,an improved damping controller based on genetic particle swarm optimization is added to the rotor side to suppress the sub-synchronous oscillation of DFIG.The time domain simulation results show that the proposed method is more effective than the fixed parameter suppression method in suppressing SSO of the wind power series compensation system.
In view of the lack of the mechanism of subsynchronous oscillation and the dynamic optimization of the parameter,most of the existing suppression measures for SSO of the wind power series compensation system lack the clear physical meaning and the inhibition effect has been greatly limited.In this paper,the model of DFIG connected to the grid by series compensation is established.Besides,through mathematical deduction,the mechanism of SSO is analyzed in detail,and the influencing factors are analyzed through time domain simulation.Based on that,an improved damping controller based on genetic particle swarm optimization is added to the rotor side to suppress the sub-synchronous oscillation of DFIG.The time domain simulation results show that the proposed method is more effective than the fixed parameter suppression method in suppressing SSO of the wind power series compensation system.
引文
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[3] 徐政,罗惠群,祝瑞金.电力系统次同步振荡问题的分析方法概述[J].电网技术,1999,23(6):36-39.
[4] 栗然,卢云,刘会兰,等.双馈风电场经串补并网引起同步振荡机理分析[J].电网技术,2013,37(1):3073-3079.
[5] Suriyaarachchi DHR,Annakkage U D,Karawita C,et al.A procedure to study subsynchronous interactions in wind integrated power systems[J].IEEE Transactions on power systems,2012,28(1):377-384.
[6] Zhixin Miao,Impedance-Model-Based SSR Analysis for Type 3 Wind Generator and Series-Compensated Network[J].IEEETransactions on power systems,2012,27(4):984-991.
[7] Huakun Liu,Xiaorong Xie,Yu Li.A small-signal impedance method for analyzing the SSR of series-compensated DFIG-based wind farms[C].Power & Energy Society General Meeting,2015 IEEE,2015.
[8] 董晓亮,田旭,张勇,等.沽源风电场串补输电系统次同步谐振典型事件及影响因素分析[J].高电压技术,201743(1):321-328.
[2] Adams J,Carter C,Shun Hsien Huang.ERCOT experience with sub-synchronous control interaction and proposed remediation[C].Transmission and Distribution Conference and Exposition (T&D),2012 IEEE PES,2012:1-5.
[3] 徐政,罗惠群,祝瑞金.电力系统次同步振荡问题的分析方法概述[J].电网技术,1999,23(6):36-39.
[4] 栗然,卢云,刘会兰,等.双馈风电场经串补并网引起同步振荡机理分析[J].电网技术,2013,37(1):3073-3079.
[5] Suriyaarachchi DHR,Annakkage U D,Karawita C,et al.A procedure to study subsynchronous interactions in wind integrated power systems[J].IEEE Transactions on power systems,2012,28(1):377-384.
[6] Zhixin Miao,Impedance-Model-Based SSR Analysis for Type 3 Wind Generator and Series-Compensated Network[J].IEEETransactions on power systems,2012,27(4):984-991.
[7] Huakun Liu,Xiaorong Xie,Yu Li.A small-signal impedance method for analyzing the SSR of series-compensated DFIG-based wind farms[C].Power & Energy Society General Meeting,2015 IEEE,2015.
[8] 董晓亮,田旭,张勇,等.沽源风电场串补输电系统次同步谐振典型事件及影响因素分析[J].高电压技术,201743(1):321-328.