A reform was conducted in view of the frequent internal disturbance and poor valve performance of the automatic water-level control system for No.4 boiler drum in Maoming Cogeneration Power Plant.

• 茂名热电厂4号炉汽包水位自动调节系统存在内扰动频繁、阀门特性差等问题，为此对其进行了改造。