Currently, the power electronics-based devices, includinglarge-scale non-synchronized generators and reactivepower compensators, are widely used in power grids. This helpsintroduce the coupling interactions between th...Currently, the power electronics-based devices, includinglarge-scale non-synchronized generators and reactivepower compensators, are widely used in power grids. This helpsintroduce the coupling interactions between the devices andthe power grid, resulting in a new sub-synchronous oscillationphenomenon. It is a critical element for the stability operation ofthe power grid and its devices. In this paper, the sub-synchronousoscillation phenomenon of the power grid connected with largescalewind power generation is analyzed in detail. Then, inorder to damp the sub-synchronous oscillation, a coordinateddamping optimization control strategy for wind power generatorsand their reactive power compensators is proposed. The proposedcoordinated control strategy tracks the sub-synchronousoscillation current signal to correct the corresponding controlsignal, which increases the damping of power electronics. Theresponse characteristics of the proposed control strategy areanalyzed, and a self-optimization parameter tuning method basedon sensitivity analysis is proposed. The simulation results validatethe effectiveness and the availability of the proposed controlstrategy.展开更多
针对TORA(Translational oscillator with rotating actuator)系统的镇定控制问题,提出一种基于θ-D方法的非线性最优控制方案.应用拉格朗日方程建立TORA系统的数学模型,为保证状态空间形式的TORA系统数学模型中状态向量系数矩阵A(x)能...针对TORA(Translational oscillator with rotating actuator)系统的镇定控制问题,提出一种基于θ-D方法的非线性最优控制方案.应用拉格朗日方程建立TORA系统的数学模型,为保证状态空间形式的TORA系统数学模型中状态向量系数矩阵A(x)能够分离出常值矩阵,且其能与控制位置矩阵构成可控对,采用不同于传统形式的解耦坐标变换对TORA系统进行了处理,以此为基础为TORA系统设计基于θ-D方法的非线性最优控制器,该控制方案可离线得到控制输入的显示表达式.通过数值仿真以及与基于局部线性化的线性最优控制方案进行比较,验证了所提非线性最优控制方案所具有的良好瞬态性能.展开更多
基金the NationalNatural Science Foundation of China under Grant No.51577174.
文摘Currently, the power electronics-based devices, includinglarge-scale non-synchronized generators and reactivepower compensators, are widely used in power grids. This helpsintroduce the coupling interactions between the devices andthe power grid, resulting in a new sub-synchronous oscillationphenomenon. It is a critical element for the stability operation ofthe power grid and its devices. In this paper, the sub-synchronousoscillation phenomenon of the power grid connected with largescalewind power generation is analyzed in detail. Then, inorder to damp the sub-synchronous oscillation, a coordinateddamping optimization control strategy for wind power generatorsand their reactive power compensators is proposed. The proposedcoordinated control strategy tracks the sub-synchronousoscillation current signal to correct the corresponding controlsignal, which increases the damping of power electronics. Theresponse characteristics of the proposed control strategy areanalyzed, and a self-optimization parameter tuning method basedon sensitivity analysis is proposed. The simulation results validatethe effectiveness and the availability of the proposed controlstrategy.
文摘针对TORA(Translational oscillator with rotating actuator)系统的镇定控制问题,提出一种基于θ-D方法的非线性最优控制方案.应用拉格朗日方程建立TORA系统的数学模型,为保证状态空间形式的TORA系统数学模型中状态向量系数矩阵A(x)能够分离出常值矩阵,且其能与控制位置矩阵构成可控对,采用不同于传统形式的解耦坐标变换对TORA系统进行了处理,以此为基础为TORA系统设计基于θ-D方法的非线性最优控制器,该控制方案可离线得到控制输入的显示表达式.通过数值仿真以及与基于局部线性化的线性最优控制方案进行比较,验证了所提非线性最优控制方案所具有的良好瞬态性能.