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Condensation suppression method and system for equipment and photovoltaic igbt device cabinet

An equipment and condensation technology, applied in control/regulation systems, instruments, non-electric variable control, etc., can solve problems such as dew point temperature rise, waste of energy, and difficulty in measuring air dew point temperature, so as to improve accuracy and improve efficiency. sexual effect

Active Publication Date: 2017-12-15
BEIJING ETECHWIN ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, some schemes only judge the temperature of the air inside and outside the cabinet is not equal, then start the heater to heat and dehumidify. Maybe the surface temperature of the cabinet at this time is still far from the dew point temperature of the environment at this time (which can be understood as the critical temperature for condensation). No need for heating, energy is wasted
On the contrary, due to frequent heating (if the heater power is not selected properly), the air temperature rises and the dew point temperature rises, which makes the inner wall of the cabinet more prone to condensation
There are also some solutions that forcibly heat the air in the cabinet continuously before starting up or for a certain period of time. This solution also has the risk of condensation reoccurring, wasting energy, and the condensation suppression efficiency is low.
[0003] The reason for the low efficiency of the above-mentioned extensive control methods is that it is difficult to measure the air dew point temperature in practice, and the dew point temperature calculated according to the theoretical model has limitations in the temperature range and conditions, and the dew point temperature is not accurate, resulting in ineffective condensation suppression. good

Method used

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  • Condensation suppression method and system for equipment and photovoltaic igbt device cabinet
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  • Condensation suppression method and system for equipment and photovoltaic igbt device cabinet

Examples

Experimental program
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Effect test

Embodiment 1

[0025] figure 1 It is a flow chart showing the condensation suppression method of the device according to Embodiment 1 of the present invention. refer to figure 1 , the method includes:

[0026] S110, receiving the detected air temperature and relative humidity in the equipment, and according to the preset corresponding relationship between air temperature and air moisture content (see image 3 Shown curve), determine the air saturation water content Hb corresponding to the detected air temperature;

[0027] It should be noted image 3 The shown curve is actually the corresponding relationship between air temperature and air saturated water content, so the corresponding air saturated water content corresponding to the detected air temperature obtained in S110 according to the corresponding relationship;

[0028] S112, calculating the absolute moisture content of the air in the device according to the relative humidity and the corresponding saturated moisture content of the...

Embodiment 2

[0035] figure 2 It is a flow chart showing the condensation suppression method of the device according to Embodiment 2 of the present invention, and the embodiment can be regarded as figure 1 Another specific implementation scheme of . refer to figure 2 , the condensation suppression method includes:

[0036] S210, the temperature and humidity sensing device (such as a temperature and humidity sensor) detects the air temperature T2 and relative humidity RH% in the device.

[0037] S212, the controller calculates and determines the dew point temperature T, and the specific operation corresponds to the operation of S110-S114; what needs to be explained here is that the corresponding relationship between the preset air temperature and the air moisture content can be queried from the relevant manual, as follows image 3 shown. Since this curve cannot be represented by a unified formula, it is implemented in a segmented manner (such as 10°C as a segment) to fit and express the ...

Embodiment 3

[0053] Based on the same technical idea, Figure 5 is a structural block diagram showing the condensation suppression system of the device according to the third embodiment of the present invention. figure 1 The explanations can be applied to this embodiment, refer to Figure 5 , the system consists of:

[0054] The temperature and humidity sensing device 51 is used to detect the air temperature and relative humidity in the equipment;

[0055] The controller 52 is connected with the temperature and humidity sensing device 51, and the controller 52 is used to determine the saturated air moisture content corresponding to the detected air temperature according to the preset corresponding relationship between the air temperature and the air moisture content; and according to the relative humidity and The corresponding air saturated water content is calculated to obtain the absolute water content of the air in the equipment, and according to the corresponding relationship, the te...

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Abstract

An embodiment of the invention provides a condensation inhibition method and system for equipment and a photovoltaic IGBT device cabinet body. The method includes the steps of: receiving air temperature and relative humidity inside equipment which are obtained by detection; according to a preset corresponding relation between air temperature and water content of air, determining saturation water content of air corresponding to the air temperature obtained by detection; calculating to obtain absolute water content of air inside the equipment according to the relative humidity and the corresponding saturation water content of air, determining a temperature value corresponding to the absolute water content of air inside the equipment according to the preset corresponding relation between the air temperature and the water content of air, and the temperature value being the dew point temperature of the equipment; controlling heating of the air inside the equipment according to the dew point temperature to inhibit condensation. By adoption of the condensation inhibition method, the accuracy of the dew point temperature is improved from two dimensionalities of real-time performance and stability, thereby improving effectiveness of inhibition of condensation inside a photovoltaic IGBT device cabinet body.

Description

technical field [0001] The invention relates to condensation suppression technology, in particular to a condensation suppression method and system for equipment and a photovoltaic IGBT cabinet. Background technique [0002] At present, for power electronic equipment, such as photovoltaic IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), when the application environment is relatively harsh, when the ambient humidity is high and the temperature difference between day and night is large, it is bound to be Condensation will occur. Condensation will not only accelerate the corrosion and rust of metal materials in the cabinet, cause the circuit board to work abnormally, and cause the disorder and failure of the control function of the whole system, but also the water droplets attached to the surface of the insulating material will greatly reduce the insulation inside the equipment. In severe cases, it can cause insulation breakdown between devices and s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D27/02
CPCG05D27/02
Inventor 李俊峰凌晨董玉坡
Owner BEIJING ETECHWIN ELECTRIC