Delta Electronics (Shanghai) Co., Ltd

Xi'an Jiaotong University

Zeng Liu

Jinjun Liu

Teng Wu

Shike Wang

Baojin Liu

Yong Tao

A method and an apparatus for decoupling output power of an inverter are provided. The method comprises: obtaining voltage amplitude instruction E* and voltage phase instruction &#x3b8;* according to an output voltage and an output current of the inverter; obtaining an amplitude feedforward amount Eand a phase feedforward amount &#x3b4;according to an amplitude U of a grid voltage of the power grid, an amplitude E of the output voltage of the inverter, and a phase difference &#x3b4; between the output voltage of the inverterand the grid voltage; obtaining a reference voltage amplitude Eaccording to the voltage amplitude instruction E* and the amplitude feedforward amount E, and obtaining a reference voltage phase &#x3b8;according to the voltage phase instruction &#x3b8;* and the phase feedforward amount &#x3b4;; and regulating the output power of the inverter using the reference voltage amplitude Eand the reference voltage phase &#x3b8;.

Method and apparatus for decoupling the power of grid-connected inverter

The present invention discloses a secondary control method and apparatus of parallel inverters in a micro grid, comprising: generating frequency and amplitude of fundamental voltage in the voltage instruction of inverter by droop control according to output voltage and output current of inverter to obtain a fundamental voltage instruction value; extracting voltage values and current values of a first and second AC signals from output voltage and output current of inverter, generating frequency instruction values of the first and second AC signals by droop control to obtain voltage instruction values of the first and second AC signals; regulating the output voltage of inverter according to the voltage instruction value of the first AC signal, the voltage instruction value of the second AC signal and the fundamental voltage instruction value.

Secondary control method and apparatus of parallel inverters in micro grid

Growing community of inventors

Shaanxi, China

Zeng Liu