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发明公开
CN106374523A 一种抑制随机性电源直流分量注入电网的方法和装置 无效 - 驳回

一种抑制随机性电源直流分量注入电网的方法和装置
摘要：
本发明涉及一种抑制随机性电源直流分量注入电网的方法和装置，包括如下步骤：(1)读取三相电压控制指令；(2)将三相电压控制指令中的三相分别进行n个电网电压周期的均值处理，得到三相电压控制指令均值，其中n为正整数；叠加到三相电压控制指令上对三相电压控制指令进行纠偏；(4)将纠偏后的三相电压控制指令作为输入调制波输入SPWM模块，控制功率器件工作。本发明提供的技术方案，通过采集电压控制指令信号对三相坐标系的三相电压进行纠偏，由于没有直接提取三相交流电流中的直流分量，所以避免了直流分量提取不准确的问题。(3)以上述三相电压控制指令的均值为纠偏量，
摘要（英）：

The invention relates to a method and an apparatus for suppressing a direct current component of a random power supply from injecting into a power grid. The method comprises the following steps of (1) reading a three-phase voltage control instruction; (2) performing average value processing within n power grid voltage periods on the three phases in the three-phase voltage control instruction to obtain a three-phase voltage control instruction average value, wherein n is a positive integer; (3) taking the three-phase voltage control instruction average value as deviation-correcting amount, and enabling the deviation-correcting amount to be overlaid to the three-phase voltage control instruction to perform deviation correction on the three-phase voltage control instruction; and (4) taking the deviation-corrected three-phase voltage control instruction as an input modulation wave to be input into an SPWM module so as to control the operation of a power device. By adoption of the technical scheme provided by the invention, the three-phase voltage in a three-phase coordinate system is subjected to deviation correction by collecting a voltage control instruction signal; and the direct current component in the three-phase alternating current is not directly extracted, so that the problem of inaccurate direct current component extraction is avoided.

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