摘要
目前,阀冷系统的内冷与外冷控制系统在距离上分布较远,普遍采用通信光纤进行连接和数据通信。为防止因设备故障、外力破坏等因素造成内外冷控制系统之间通信中断,进而导致换流阀因阀冷系统失去冷却能力而闭锁的严重故障,给出一种适用于内外冷控制系统之间通信故障的优化解决方案。其在外冷控制系统中设置通信故障检测回路和快速响应控制回路,并通过PLC软件对通信状态进行实时检测与控制。当通信故障检测回路检测到内外冷控制系统通信中断时,可通过快速响应控制回路迅速作出响应,进而控制中间继电器启动外冷系统的换热设备。该方案不仅能够保持阀冷系统的正常冷却能力,还可有效提高阀冷系统的可靠性。
At present,the internal cooling and external cooling control systems of the valve cooling system are far apart in the distance,communication fibers are commonly used for connection and data communication.In order to prevent communication interruption between internal and external cooling control systems due to equipment failure and external force damage,in turn causes the converter valve to be severely blocked because of the loss of cooling capacity of the valve cooling system;an optimization solution for communication between internal and external cooling control systems is given.It sets up communication fault detection loop and fast response control loop in the external cooling control system,and detects and controls the communication status in real time through PLC software.When the communication fault detection loop detects the communication interruption of the internal and external cooling control systems,it can respond quickly through the fast response control loop,and then control the intermediate relay to start the heat exchange equipment of the external cooling system.With this scheme,not only the normal cooling capacity of the valve cooling system can be maintained,but also the reliability of the valve cooling system can be effectively improved.
作者
张琳琳
马根坡
罗永金
ZHANG Linlin;MA Genpo;LUO Yongjin(Xuchang XJJR Science & Technology Co. ,Ltd. ,Xuchang 461000,China)
出处
《自动化仪表》
CAS
2019年第9期66-69,共4页
Process Automation Instrumentation
关键词
高压直流输电
阀冷系统
光纤通信
通信中断
通信故障检测
HVDC transmission
Valve cooling system
Fiber optic communication
Communication interruption
Communication fault detection
