基于预测电流控制的SEIG电压稳定研究
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摘要
针对自励异步发电机(SEIG)加载出现的机端电压跌落问题,设计了一种采用静止同步补偿器(STATCOM)并联无功补偿的稳压系统,以维持加载运行情况下机端电压的稳定。为实现指令电流良好的动态响应和更快的指令跟踪控制,对电流内环控制器采用了预测电流控制(PCC)方法,最终实现机端电压暂态调节性能和控制系统自适应能力的提高。仿真结果表明,所采用的预测电流控制方法与传统的比例-积分(PI)控制比较,能更有效提高SEIG的带载能力和电流跟踪能力,机端电压在加载瞬间表现出更好的鲁棒性和调节能力。仿真结果验证了预测电流控制方法的有效性和可行性。
To deal with the voltage sag problem of the stand-alone self-excited induction generator(SEIG)when loading, a voltage regulation system based on the static synchronous compensator(STATCOM) is designed to maintain a constant terminal voltage of SEIG under loading conditions. In order to improve the transient performance and adaptation ability of the voltage regulation system, a predictive current control(PCC)method is proposed to design inner loop current controllers so that the transient performance and adaptation ability of the voltage regulation system will ultimately improve. Simulation results show that the proposed approach can improve the loading capacity and current tracking capabilities of SEIG very well compared with the classical methods. Terminal voltage performs well in robustness and regulation when loading. It has been shown that the proposed control method works very effectively.
To deal with the voltage sag problem of the stand-alone self-excited induction generator(SEIG)when loading, a voltage regulation system based on the static synchronous compensator(STATCOM) is designed to maintain a constant terminal voltage of SEIG under loading conditions. In order to improve the transient performance and adaptation ability of the voltage regulation system, a predictive current control(PCC)method is proposed to design inner loop current controllers so that the transient performance and adaptation ability of the voltage regulation system will ultimately improve. Simulation results show that the proposed approach can improve the loading capacity and current tracking capabilities of SEIG very well compared with the classical methods. Terminal voltage performs well in robustness and regulation when loading. It has been shown that the proposed control method works very effectively.
引文
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[2]Chauhan Y K,Yadav V K,Singh B.Optimum Utilisation of Self-excited Induction Generator[J].IET Electric Power Applications,2013,7(9):680-692.
[3]胡育文,黄文新,张兰红.异步发电机起动/发电系统的研究[J].电工技术学报,2006,21(5):7-13.Hu Y W,Huang W X,Zhang L H,Research on Employing Starter/Generator System[J].Transactions of China Electrotechnical Society,2006,21(5):7-13.
[4]刘天璋,吴新振.并联补偿电容对自励异步发电机运行性能的影响[J].电网技术,2005,29(6):53-57.Liu T Z,Wu X Z.Influence of Shunt Compensation Capacitors on Performance of Self-excited Induction Generator[J].Power System Technology,2005,29(6):53-57.
[5]Wang L,Su J.Dynamic Performances of an Isolated Self-Excited Induction Generator Under Various Loading Conditions[J].IEEETransactions on Energy Conversion,1999,14(1):93-99.
[6]Wang L,Lee D.Coordination Control of an AC-to-DC Converter and a Switched Excitation Capacitor Bank for an Autonomous Self-Excited Induction Generator in Renewable-Energy Systems[J].IEEETransactions on Industry Applications,2014,50(4):2828-2836.
[7]Chilipi R R,Singh B,Murthy S S.Performance of a Self-Excited Induction Generator with DSTATCOM-DTC Drive-Based Voltage and Frequency Controller[J].IEEE Transactions on Energy Conversion,2014,29(3):545-557.
[8]Chilipi R R,Singh B,Murthy S S,et al.Design and Implementation of Dynamic Electronic Load Controller for Three-phase Self-excited Induction Generator in Remote Small-hydro Power Generation[Z].2013,8(3):269-280.
[9]Singh B,Murthy S S,Gupta S.STATCOM-Based Voltage Regulator for Self-Excited Induction Generator Feeding Nonlinear Loads[J].IEEE Transactions on Industrial Electronics,2006,53(5):1437-1452.
[10]钟炎平,张勋,陈耀军.三相PWM整流器基于电容能量的电压控制策略[J].控制工程学报,2014,21(3):223-225.ZHONG Y P,ZHANG X,CHEN Y J.Research on Fast Transient Response Control of PWM Rectifier[J].Control Engineering of China,2014,21(3):223-225.
[11]席裕庚,李德伟,林姝.模型预测控制--现状与挑战[J].自动化学报,2013,39(3):222-236.Xi Y G,Li D W,Lin S.Model Predictive Control-status and Challenges[J].Acta Automatica Sinica,2013,39(3):222-236.
[12]Zhang Y,Lin H.Simplified model predictive current control method of voltage-source inverter[C].IEEE International Conference on Power Electronics&Ecce Asia.IEEE,2011.
[13]Bolognani S,Peretti L,et al.Design and Implementation of Model Predictive Control for Electrical Motor Drives[J].IEEE Transactions on Industrial Electronics,2009,56(6):1925-1936.
[14]Rodriguez J,Pontt J,Silva C A,et al.Predictive Current Control of a Voltage Source Inverter[J].IEEE Transactions on Industrial Electronics,2007,54(1):495-503.
[15]Muller S,Ammann U,Rees S.New modulation strategy for a matrix converter with a very small mains filter[C].IEEE Power Electronics Specialist Conference.IEEE,2003.