电网电压不对称下双馈感应发电机(doubly fedinduction generator DFIG)转子侧变流器(rotor side converter,RSC)和网侧变流器(grid-side converter,GSC)的有效控制对风电场并网运行有着重要意义。提出了基于预测电流的DFIG系统优化控...电网电压不对称下双馈感应发电机(doubly fedinduction generator DFIG)转子侧变流器(rotor side converter,RSC)和网侧变流器(grid-side converter,GSC)的有效控制对风电场并网运行有着重要意义。提出了基于预测电流的DFIG系统优化控制策略:针对DFIG,构建了电网电压不对称下预测电流控制模型;对GSC,在常规预测电流模型上进行改进;分析了RSC和GSC优化控制目标。在实时数字仿真(real time digital simulator,RTDS)平台上搭建了一台2MW DFIG风电系统完整仿真模型,验证了上述控制策略的正确性和有效性。展开更多
Under unbalanced source voltage supply, considerable output second harmonics and input low-order harmonics in 3-phase PWM current-source converters (PWM-CSC) are generated. This paper proposes a new deadbeat controlle...Under unbalanced source voltage supply, considerable output second harmonics and input low-order harmonics in 3-phase PWM current-source converters (PWM-CSC) are generated. This paper proposes a new deadbeat controller based on compensation for unbalanced source voltage and current. With the proposed scheme, the second harmonics of the output current are eliminated and low-order harmonics of the source current are reduced effectively. Simulation and experimental results con- firmed the feasibility of the proposed method.展开更多
文摘电网电压不对称下双馈感应发电机(doubly fedinduction generator DFIG)转子侧变流器(rotor side converter,RSC)和网侧变流器(grid-side converter,GSC)的有效控制对风电场并网运行有着重要意义。提出了基于预测电流的DFIG系统优化控制策略:针对DFIG,构建了电网电压不对称下预测电流控制模型;对GSC,在常规预测电流模型上进行改进;分析了RSC和GSC优化控制目标。在实时数字仿真(real time digital simulator,RTDS)平台上搭建了一台2MW DFIG风电系统完整仿真模型,验证了上述控制策略的正确性和有效性。
基金Project (No. 50477033) supported by the National Nature ScienceFoundation of China
文摘Under unbalanced source voltage supply, considerable output second harmonics and input low-order harmonics in 3-phase PWM current-source converters (PWM-CSC) are generated. This paper proposes a new deadbeat controller based on compensation for unbalanced source voltage and current. With the proposed scheme, the second harmonics of the output current are eliminated and low-order harmonics of the source current are reduced effectively. Simulation and experimental results con- firmed the feasibility of the proposed method.