Overheat protection device and method of inverter

An overheating protection and inverter technology, applied in emergency protection circuit devices, output power conversion devices, electrical components, etc., can solve problems such as undervoltage and overheating shutdown, avoid large fluctuations in output power, and prolong grid-connected power generation time Effect
CN102710112AActive Publication Date: 2012-10-03SUNGROW POWER SUPPLY CO LTD
3 Cites 21 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SUNGROW POWER SUPPLY CO LTD
Publication Date
2012-10-03

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to an overheat protection device and method of an inverter. The overheat protection method comprises the following steps of: detecting real-time temperature of a power device of the inverter in the operation process; judging whether the real-time temperature is greater than a first preset temperature; and if so, boosting the maximum power tracking output voltage to the right side of a maximum power point of a P-V curve, carrying out amplitude-limiting on active current giving and reducing the active current giving, wherein the output power of the inverter is reduced by reduction of the active current giving so that the temperature of the power device is reduced. The overheat protection device and method disclosed by the invention have the advantages of capabilities of carrying out rapid control on the temperature in real time, avoiding larger fluctuation of the output power of the inverter, controlling the output power of the inverter to be zero without poweroff and effectively prolonging the grid-connected generation time of the inverter.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of electrical equipment control, in particular to an inverter overheat protection device and an overheat protection method thereof. Background technique

[0002] There are two main methods of inverter overheating protection:

[0003] Method 1. According to the thermal test, a temperature threshold T is determined under the condition of ensuring the safety of the power device. The inverter detects the temperature of the power device during operation. If the detected temperature exceeds the temperature threshold T, the inverter Turn off to avoid overheating and damage to the inverter power device;

[0004] Method 2, according to the thermal test, two temperature thresholds T1 and T2 are determined under the condition of ensuring the safety of power devices, and T1 is less than T2, such as figure 1 shown. The inverter detects the temperature of the power device during operation. When the detected temperature exceeds t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More