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发明公开
CN109274283A 基于动态分层排序的控制MMC电容电压平衡的方法及系统 无效 - 驳回

基于动态分层排序的控制MMC电容电压平衡的方法及系统
摘要：
本发明公开了一种基于动态分层排序的控制MMC电容电压平衡的方法及系统，属于电力系统数字仿真技术领域。本发明方法具体流程包括：计算阀臂各层电压高；计算阀臂中每个子模块所属层号，并根据每个子模块所属层号，统计各层子模块数目；根据阀臂投入子模块数目，确定排序层号及排序层投入子模块数目；根据电容电压平衡控制排序算法确定排序层的子模块投入或切除状态；根据阀臂电流方向，确定其他层子模块投入或切除状态。本发明仅需对某一层子模块电容电压进行排序，与传统的基于排序算法的电容电压平衡控制方法需对单个阀臂所有子模块电容电压进行排序相比，不影响传统的基于排序算法的电容电压平衡控制方法的控制效果的前提下，可大幅提升计算效率。
摘要（英）：

The invention discloses a method and a system for controlling MMC capacitor voltage balance based on dynamic hierarchical sorting, belonging to the technical field of power system digital simulation.The method of the invention comprises the following steps of: calculating the high voltage of each layer of the valve arm; Calculating the layer number of each sub-module in the valve arm, and counting the number of sub-modules of each layer according to the layer number of each sub-module; Determining a sorting layer number and a number of sorting layer input sub-modules according to the number of the valve arm input sub-modules; Determining the input or output state of the sub-modules of the sorting layer according to the sorting algorithm of the capacitor voltage balance control; Accordingto the current direction of the valve arm, determine the input or output state of the other sub-modules. The invention only need to sort the capacitance voltages of a certain lay sub-module, Comparedwith the traditional sorting algorithm based capacitor voltage balance control method which needs to sort the capacitor voltage of all sub-modules of a single valve arm, the traditional sorting algorithm based capacitor voltage balance control method can greatly improve the computational efficiency under the premise of not affecting the control effect of the traditional sorting algorithm.

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