Zhejiang Huaqi is eager to use frequency conversion technology and began to widely promote

In order to ease the use of voltage and improve the efficiency of energy applications, a technology called "high-voltage frequency conversion" began to be used in Zhejiang chemical companies since the first half of this year. In an interview with Juhua Group, Zhejiang's largest chemical company, the reporter learned that three high-voltage motors with powers of 1600 kW, 355 kW, and 280 kW, respectively, currently use frequency conversion technology, resulting in energy-saving efficiency of 30% to 40%. Not only can the company save about 3 million yuan in electricity bills for the whole year, but also the total investment of 3.3 million yuan in frequency conversion equipment can be fully recovered in one and a half years. In the first half of the year, Juhua passed various energy-saving technological reforms and other measures, saving 262 million kWh and saving 22.53 million tons of water.
High-voltage frequency conversion technology is mainly used in pumping stations, fans and other equipment of high-energy-consuming enterprises such as chemical, cement, steel, tap water, and thermoelectricity. Because in the engineering design, pump stations, fans and other equipment generally leave 30% of surplus power, there is a "big horse-drawn car" phenomenon in operation. Inverter high-voltage equipment, according to the actual needs of the production process, to adjust the high-frequency motor speed frequency, thus saving power. Juhua Group currently has more than 200 high-voltage motors. The average load of these motors is 400 kilowatts (400 kilowatt hours per hour). According to the industrial electricity consumption of 0.53 yuan per hour, the electricity cost is nearly 1 million yuan per day. According to calculations by the provincial power department, Zhenhai Refinery, Jiangshan Chemical, Xin'anjiang Chemical and Jiaxing Chemical have an average of more than 50 high-voltage motors, and only high-voltage motors in the chemical industry exceed 2,500, with an average annual power consumption of 7.6 billion kWh, and a power saving potential of approximately 23%. Billion degrees.
Since Chaoyang Rubber Co., Ltd. of Hangzhou used the “frequency conversion power-saving control technology for large-capacity cooling towers”, it has saved 260,000 kilowatt-hours of electricity and has an average electricity saving rate of 42.2%. In Cixi, injection molding machine companies use the frequency conversion technology to save electricity. At present, Cixi has more than 300 companies have adopted variable frequency technology, annual electricity savings of up to 40 million kwh, the annual energy savings created by about 30 million yuan.
According to the relevant personnel of the Department of Resource Conservation and Comprehensive Utilization of the Zhejiang Economic and Trade Commission, there are currently more than 5,000 units of high-voltage inverters that can be installed in enterprises across the province, but the total amount of ownership is not high at present.

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