珠海发电厂循环水供水系统水力瞬变的控制

Control of hydraulic transient of the circulating water supply system in Zhuhai power station

文章根据珠海发电厂循环水供水系统工程布置的特点,研究了事故断电条件下水力瞬变引起的液柱分离现象及其防止措施,提出了求解空气阀瞬变过程的新模型。计算研究表明,可以采用沿线布置空气阀防止瞬变液柱分离破坏。分析了现行凝汽器数学模型与水柱分离及再弥合判断条件存在安全裕度较大等问题。

According to the characteristics of the project layout of the circulating water supply system in Zhuhai Power Station,this paper analyzes the liquid-column separation phenomenon caused by hydraulic transient under the condistion of power off and it＇s preventive measures,puts forward the new model to solve the transient process of air valve.Calculation and study shows that air valve can be arranged along the line to prevent the separation and damage of transient liquid-column.This paper also analyzes the problem of larger safety margin of judging condition of the current condenser mathematical model separating from water column and re-bridge with it.