电力系统自动化
電力繫統自動化
전력계통자동화
AUTOMATION OF ELECTRIC POWER SYSTEMS
2015年
3期
30-35,109
,共7页
张学广%陈辉%马彦%马红兵%徐殿国
張學廣%陳輝%馬彥%馬紅兵%徐殿國
장학엄%진휘%마언%마홍병%서전국
双馈风力发电机%定子电流观测器%模型参考自适应%故障诊断%容错控制
雙饋風力髮電機%定子電流觀測器%模型參攷自適應%故障診斷%容錯控製
쌍궤풍력발전궤%정자전류관측기%모형삼고자괄응%고장진단%용착공제
doubly-fed induction generator wind turbine%stator current observer%model reference self-adaptiveness%fault detection%fault tolerant control
为提高双馈风力发电机运行可靠性，提出了一种定子电流传感器故障检测及容错控制方法。在电网电压矢量定向同步坐标系下，根据双馈风力发电机动态模型，建立了基于模型参考自适应方法的定子电流冗余在线观测器。通过建立参考模型和可调模型，使定子电流观测值实时跟随实际电流。在αβ坐标系下通过定子电流检测值和观测值的比较残差实现传感器故障的自诊断。在故障后以定子电流观测值为控制对象实现无定子电流传感器运行。所设计观测器准确度不依赖于定子电流测量值且对电机参数变化具有较好的鲁棒性。文中方法能够在定子电流传感器故障条件下及时判断出故障的来源，并实现故障后的容错控制。在双馈风力发电机实验机组上，对所提出理论的正确性和可行性进行了实验验证。
為提高雙饋風力髮電機運行可靠性，提齣瞭一種定子電流傳感器故障檢測及容錯控製方法。在電網電壓矢量定嚮同步坐標繫下，根據雙饋風力髮電機動態模型，建立瞭基于模型參攷自適應方法的定子電流冗餘在線觀測器。通過建立參攷模型和可調模型，使定子電流觀測值實時跟隨實際電流。在αβ坐標繫下通過定子電流檢測值和觀測值的比較殘差實現傳感器故障的自診斷。在故障後以定子電流觀測值為控製對象實現無定子電流傳感器運行。所設計觀測器準確度不依賴于定子電流測量值且對電機參數變化具有較好的魯棒性。文中方法能夠在定子電流傳感器故障條件下及時判斷齣故障的來源，併實現故障後的容錯控製。在雙饋風力髮電機實驗機組上，對所提齣理論的正確性和可行性進行瞭實驗驗證。
위제고쌍궤풍력발전궤운행가고성，제출료일충정자전류전감기고장검측급용착공제방법。재전망전압시량정향동보좌표계하，근거쌍궤풍력발전궤동태모형，건립료기우모형삼고자괄응방법적정자전류용여재선관측기。통과건립삼고모형화가조모형，사정자전류관측치실시근수실제전류。재αβ좌표계하통과정자전류검측치화관측치적비교잔차실현전감기고장적자진단。재고장후이정자전류관측치위공제대상실현무정자전류전감기운행。소설계관측기준학도불의뢰우정자전류측량치차대전궤삼수변화구유교호적로봉성。문중방법능구재정자전류전감기고장조건하급시판단출고장적래원，병실현고장후적용착공제。재쌍궤풍력발전궤실험궤조상，대소제출이론적정학성화가행성진행료실험험증。
To improve the reliability of doubly-fed induction generator(DFIG)wind turbines,a method of stator current sensor fault detection and reconfiguration is proposed.In the synchronous coordinate system with grid voltage oriented control,a stator current observer is established to estimate the actual stator current based on the dynamic model of DFIG and model reference self-adaptive method.By constructing the reference model and the adaptive model,the observed value of stator current can track the actual one in time.In static αβ coordinate system,residual value can be obtained by calculating the difference between the measured and the observed stator current to realize the stator current sensor fault diagnosis.The observed value of stator current can be used in control system to realize stator current sensorless control in case of sensor failure.The observer proposed is independent from the measured stator currents and is robust to the variation of generator parameters.The proposed method can identify the specific source of sensor failure in time when stator current sensor fault occurs and realize fault tolerant control.The correctness and feasibility of the proposed method is validated on a DFIG laboratory platform.
