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Overheat protection device and method of inverter

An overheat protection and inverter technology, applied in emergency protection circuit devices, output power conversion devices, electrical components, etc., can solve problems such as undervoltage and thermal shutdown, avoid large fluctuations in output power, and prolong grid-connected power generation time. Effect

Active Publication Date: 2014-07-16
SUNGROW POWER SUPPLY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In view of this, it is necessary to provide an inverter overheating protection device and its overheating protection method, which solves the technical problem that undervoltage or overheating shutdown may occur when the inverter is overheated in the prior art

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  • Overheat protection device and method of inverter
  • Overheat protection device and method of inverter

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Embodiment Construction

[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0042] see Figure 4 , which is a block diagram of the inverter overheat protection device provided in the preferred embodiment of the present invention. The inverter overheat protection device includes a detection module 41 , a first judging module 42 , a second judging module 43 , a third judging module 44 , a voltage boosting module 45 , a limiting module 46 and a closing module 47 .

[0043] The detection module 41 is used to detect the real-time temperature of the power devices of the inverter during the operation of the inverter. The first judging module 42 is used for judging whether the r...

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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. When a first judgment module judge that the real-time temperature is less than the first preset temperature, the detection module continues detect. 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.

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

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32H02H7/122
Inventor 王航傅立秦吴田进汪洪亮余鸿倪华
Owner SUNGROW POWER SUPPLY CO LTD
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