A method for realizing load switching based on a single temperature and humidity sensor in a control cabinet

Abstract

The invention relates to a method for achieving load switching based on a single temperature and humidity sensor in a control cubicle. The method is characterized by comprising threshold switching, slope switching and period switching, wherein according to the threshold switching, temperature and humidity thresholds are set in advance by corresponding to a high-temperature low-humidity mode or a low-temperature high-humidity mode, and corresponding loads are switched when the temperature and humidity reach the corresponding thresholds; according to the slope switching, temperature and humidity change slope values are set in advance, and corresponding loads are switched when temperature and humidity change slope values are higher or lower than the corresponding preset temperature and humidity change slope values; and according to the period switching, required periods and loads are set, and corresponding loads are switched forcefully when the set periods are reached. Multiple independent load switching methods are adopted and combined freely, the load switching of single temperature and humidity sensor is optimized, a control strategy can better meet variation characteristics of condensation in the outdoor control cubicle, and the condensation problem is solved more effectively.

Description

technical field [0001] The invention relates to a power transformation technology in a power system, in particular to a method for realizing load switching in a control cabinet based on a single temperature and humidity sensor. Background technique [0002] The traditional technical solution basically uses a set of temperature and humidity sensors, or 2 sets of humidity sensors, and very few sets of 3 sets of temperature and humidity sensors; the matching load is divided into heating type, cooling type or dehumidification type, and the number of load groups is 1 group, 2 groups or 3 groups. The distribution of temperature and humidity sensors is relatively random, and there is no clear distribution plan and matching switching strategy. The outdoor central control cabinet of the substation is generally larger in size and takes up a lot of space. The loads used are basically all heating loads (the size and power are different, and the number is also different), and a small n...

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Problems solved by technology

[0010] Solution 1 sets up a pair of temperature and humidity sensors. In the case of a large outdoor cabinet, the distribution of temperature and humidity inside the cabinet is uneven. Switching will also be affected, which in turn will affect subsequent discrimination and switching, which is related to the probability of condensation

[0011] The 3-way load load in solution 2 includes 3-way heating load and 3-way fan load. The load situation is more complicated, and the load configuration and switching load strategy are more complicated.

The starting priority between the load and the load is directly limited by the distribution of the matching temperature and humidity sensor and the threshold value set, which affects its sensitivity, and the switching time of the load is directly related to the power consumption, which in turn affects the cabinet. The uniform distribution of internal temperature and humidity and the prevention of hidden dangers of condensation

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