Gree Electric Appliances, Inc. of Zhuhai

Weitao Ni

Jing Wang

Jianhua Li

Hewei Lou

Shiyong Jiang

Xuefen Zhang

Keqin Liu

Disclosed is a control parameter determining method for a photovoltaic air conditioning system, specifically including: determining a real-time inductance parameter of a controlled object of the photovoltaic air conditioning system according to real-time grid-connected power of the photovoltaic air conditioning system; substituting the real-time inductance parameter into the controlled object of the control system to calculate a basic control parameter of the control system; presetting a plurality of adjustment parameters corresponding to different grid-connected power respectively; when the real-time grid-connected power is matched with one of the grid-connected power, selecting an adjustment parameter corresponding to the matched grid-connected power to modify the basic control parameter, to obtain a target control parameter. The present disclosure further disclosed a control parameter determining apparatus and a control system for a photovoltaic air conditioning system.

Control parameter determining method and apparatus, and control system for photovoltaic air conditioning system

Disclosed are a method and device for processing a voltage drop, a grid interconnection method and device for processing an electrical apparatus, and a system. The method includes: acquiring a drop amplitude of a first voltage for each phase in a three-phase alternating current (S); and under a condition in which the first voltage for any phase in the three-phase alternating current drops, performing reactive power compensation according to a drop amplitude of the first voltage for a phase in which the first voltage drops (S). Therefore, the electrical apparatus has a low voltage ride-through function, thereby solving the technical problem of a large deviation of voltage drop amplitude determination arising from an asymmetrical drop of three phases.

Method and device for processing voltage drop, grid interconnection processing method and device for electrical apparatus, and system

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Zhuhai, China

Weitao Ni