Automatic Temperature and Humidity Control System Using Air-Conditioning in Transformer Substation

Power supply system in Shanghai area is an important part of the country. JinShan power supply company has responded to the call of energy-saving, and is active in energy-reducing actions. In order to improve energy-efficient power transmission, JinShan power supply company made efforts to design the energy saving units and promote fine environment management by using air-conditioning. According to statistics of China´s total building energy consumption increased year by year, the total air-conditioning usage in the proportion from 9% at late 1970s up to 23.5% in recent years. The cooling and heating air conditioning energy consumption can account for 35% of the total state energy use. In hope of designing an automatic control equipment to use in the substation, the method and centralized management system of the air conditioning and ventilation system by using Programmable Logic Controller (PLC) was introduced.