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Sampling calculation method, device and air conditioner for DC voltage of photovoltaic air conditioner

A DC voltage, sampling and calculation technology, applied in the direction of measuring current/voltage, only measuring voltage, measuring devices, etc., can solve problems such as large fluctuations in photovoltaic DC voltage, excessive deviation, and excessive photovoltaic voltage protection

Active Publication Date: 2022-07-26
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0005] The invention provides a sampling calculation method and device for the DC voltage of a photovoltaic air conditioner, and an air conditioner, which can solve the problems of excessive photovoltaic voltage protection due to excessive deviation between the DC voltage sampled and calculated and the actual DC voltage, and large fluctuations in the photovoltaic DC voltage

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  • Sampling calculation method, device and air conditioner for DC voltage of photovoltaic air conditioner
  • Sampling calculation method, device and air conditioner for DC voltage of photovoltaic air conditioner
  • Sampling calculation method, device and air conditioner for DC voltage of photovoltaic air conditioner

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[0023] As used herein, the terms "first," "second," etc. may be used to describe elements in an exemplary embodiment of the present invention. These terms are only used to distinguish one element from another, and the inherent characteristics or order of the corresponding elements are not limited by the terms. Unless otherwise defined, all terms (including technical or scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Those terms as defined in common dictionaries are to be interpreted as having the same meanings as contextual meanings in the relevant technical fields, and are not to be interpreted as having ideal or overly formal meanings unless explicitly defined as having such meanings in the present invention meaning.

[0024]Those skilled in the art will understand that the apparatus and methods of the present invention described herein and illustrated in the accompanying drawing...

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Abstract

Provided are a method, a device and an air conditioner for sampling and calculating the DC voltage of a photovoltaic air conditioner. The method includes: determining a photovoltaic DC voltage V after sampling and calculation in the air conditioner. 采 with the actual output PV DC voltage V 实 Whether there is a deviation; if there is a deviation, the loop calculates V 采 ‑V mppt， V mppt is the maximum power point voltage of the photovoltaic device in the air conditioner; wherein each cycle changes the V according to preset conditions 采 ;Record the first V during the loop calculation 采 ‑V mppt The number of cycles at which the sign change occurred, and the PV DC voltage V according to the number of cycles and the number of cycles 采当前 The photovoltaic DC voltage V of the previous cycle times is collected from the previous time to determine the final photovoltaic DC voltage V collected finally. According to the scheme of the present invention, the accuracy of the DC voltage after sampling and calculation is improved; the number of false protections for the over-high photovoltaic DC voltage protection is reduced, so that the photovoltaic panel can generate electricity normally.

Description

technical field [0001] The invention relates to the field of intelligent control, and more particularly to a method and device for sampling and calculating the DC voltage of a photovoltaic air conditioner, and an air conditioner. Background technique [0002] Photovoltaic air conditioner refers to the photovoltaic direct drive variable frequency air conditioning system. The photovoltaic direct current can be directly merged into the DC bus of the on-board inverter of the variable frequency air conditioner after being rectified by the voltage stabilizer unit (DC / DC) to realize the inversion of direct current and alternating current. Unit or grid power supply. According to the photovoltaic power generation, the system can switch 5 operating modes in real time to ensure that the system can run stably under any energy changes. [0003] For air conditioners with photovoltaic functions, due to the accuracy or parasitic parameters of the components of the photovoltaic DC voltage s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
CPCG01R19/0084
Inventor 赖海龙梁景梅陆信平李肇刚胡展萌
Owner GREE ELECTRIC APPLIANCES INC
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