Rapid dynamic response synchronous phase modifier stepped external cold water temperature control method

Abstract

Aiming at a phase modifier external cold water cooling system which is provided with three cooling towers and each cooling tower is provided with a frequency conversion cooling fan, the invention provides a rapid dynamic response synchronous phase modifier stepped external cold water temperature control method, and the method can be directly realized in various distributed control systems (DCS) through a configuration mode. After the method is used, three fans are started in sequence, a single-machine mode is changed into a sequential mode, the temperature fluctuation of external cold water can be controlled in a safety interval of -1 DEG C to 1 DEG C, accidental interference generated by simultaneous starting of the cooling fans is effectively restrained, the control precision of the temperature of the external cold water is improved, disturbance to a stator coil, a rotor coil, a stator iron core and a lubricating oil system is restrained, the action frequency of a temperature adjusting valve is slowed down, and the service life of the temperature adjusting valve is prolonged.

Description

technical field [0001] The invention belongs to the technical field of thermal automatic control, and in particular relates to a step-type external cooling water temperature control method for a fast dynamic response synchronous condenser. Background technique [0002] In recent years, UHV transmission systems have caused changes in grid characteristics. Due to the slow response speed of conventional electric power and electronic equipment, it cannot quickly provide sufficient reactive power support for the system during a fault, resulting in a decrease in system voltage stability. The inherent reactive power output characteristics of the condenser can just make up for this shortcoming. Therefore, the condenser was reactivated in the era of "big power grid". The conventional control strategy of the condenser system requires professional operation and maintenance teams and more human resources, while the power grid has relatively insufficient technical reserves for rotating ...

AI Technical Summary

Problems solved by technology

When the condenser is operating in high temperature weather in summer, the temperature of the external cooling water will most likely enter the range of 30-35°C, and the conventional control method will generate a large frequency of fan start-up and stop internal disturbances, which is not conducive to the stable operation of related equipment

Moreover, under the conventional control mode, the fan starts and stops at the same time, which is not conducive to the polling backup management of the fan, and causes a lot of inconvenience to the normal maintenance during operation.

Images