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

Patent metadata

Field	Value
Publication number	US-11796194-B2
Application number	US-201716327164-A
Country	US
Kind code	B2
Filing date	Apr 18, 2017
Priority date	Sep 21, 2016
Publication date	Oct 24, 2023
Grant date	Oct 24, 2023

Abstract

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.

First claim

What is claimed is:

1. A controller for a photovoltaic air conditioner, comprising
a grid-connected power receiving port, a preset parameter receiving port, and a control parameter transmitting port, wherein the controller performs steps of:
the grid-connected power receiving port receiving a real-time grid-connected power;
determining a real-time inductance parameter of a controlled object of the controller according to the real-time grid-connected power of the photovoltaic air conditioner;
substituting the real-time inductance parameter into the controlled object of the controller to calculate a basic control parameter of the controller;
presenting a plurality of adjustment parameters corresponding to different grid-connected power ranges respectively;
the preset parameter receiving port receiving the plurality of the adjustment parameters inputted by a user;
when the real-time grid-connected power is matched with one of the grid-connected power ranges, selecting an adjustment parameter corresponding to the matched grid-connected power range to adjust the basic control parameter to obtain a target control parameter;
and
a control parameter transmitting port connecting to a proportional integral control assembly of the controlled object of the controller and transmitting the target control parameter to the proportional integral control assembly;
wherein the real-time inductance parameter is a dynamic parameter;
the substituting the real-time inductance parameter into the controlled object of the controller to calculate the basic control parameter of the controller comprises: calculating the basic control parameter of the controller according to a mathematical model including the dynamic parameter of the controlled object.

2. The controller for the photovoltaic air conditioner of claim 1 , wherein, the determining the real-time inductance parameter of a controlled object of the controller according to the real-time grid-connected power of the photovoltaic air conditioner comprises:
acquiring the real-time grid-connected power of the photovoltaic air conditioner;
calculating a real-time grid-connected current of the photovoltaic air conditioner according to the real-time grid-connected power;
determining the real-time inductance parameter according to the real-time grid-connected current.

3. The controller for the photovoltaic air conditioner of claim 1 , wherein, the determining the real-time inductance parameter according to the real-time grid-connected current comprises: determining the real-time inductance parameter from an inductance current relation curve of a reactor in the controlled object according to the real-time grid-connected current.

Assignees

• Gree Electric Appliances Inc Zhuhai

Inventors

• Li Jianhua
• Lou Hewei
• Liu Keqin
• Ni Weitao
• Wang Jing

Classifications

• F24F5/0046 Primary

  using natural energy, e.g. solar energy, energy from the ground · CPC title

• F24F11/46

  Improving electric energy efficiency or saving · CPC title

• F24F11/62 Primary

  characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values · CPC title

• F24F11/63

  Electronic processing · CPC title

• F24F11/64

  using pre-stored data · CPC title