Design of the equipment control strategies in central refrigerating station

Based on scientific and safe aspects, the equipment control strategies of the air-condition water system in central refrigerating station was mainly researched and designed, and the rational and advanced control schemes were set up in this paper. The schemes included the strategies of power distribution control with low voltage and the automatic control of the equipments. In the forward strategies refer to the control of starting high-power electromotor, the means of soft start-up, Star-Triangle start-up and frequency conversion start-up were designed respectively. By changing the starting voltage and resistance, the starting current and the starting torque of the electromotor can be decreased and changed, then the impulsion of the starting current to the electric net also can be decreased. In the latter strategies the communicate interface between automatic control of the equipments which was based on the power distribution system with low voltage and the equipments with low voltage distribution was built up, and the accurate communication agreements among all kinds of equipments were set up. At the same time, the start up and stop of the equipments can be controlled in remote, and the messages of running condition and the alarm messages of the equipment failures can be transferred timely to the operation control center, this way the water system in central refrigerating station could be run in good condition and each designing functions of central refrigerating station could be realized, and the aims of safe, effective and saving power could be reached.