An Integrated Supervisory Control Alarm System Based On Distributed

With the great process of urbanization,with the quickly growth of network,with the fast development of computer science,the subway play an important role in modern traffic field.And from then on,the SCADA has become the most popular way to detective the problem in urban rail transit.As we all know,alarm system is one of the most important part of SCADA,which try to keep the operator safe,make sure that public device work smoothly.It is important to find an efficient and accurate way to find the fault device and deal the problem in time.The alarm system of SCADA is based on the open hierarchial distributed system which use the theory of alarm management lifecycle.The alarm system has been designed with user requirement and national standards.In the process of developing the alarm system,we get the matured experiences by talking with the experts.Then we have the required document,we deal the logic part with c/c++,design the human machine interface with Qt,and we use the custom protocol,the unified framework to complete this system.The alarm system have been divide into three part,the real-time alarm management module,the alarm display module and the alarm save module.These modules are connected and communicated.The real-time alarm management module handles all alarm information caused by the change of the device signal.After receiving the change signal,the module judges whether the signal is alarm information and displays the alarm information to the human-machine interface,which requires the operator to pay attention,the real-time alarm management module updates the status information of the device in time when the operator send the command or confirm the alarm,the real-time alarm management module is the host-standby redundancy module,and the host synchronizes all the alarm information to the standby machine.The alarm display module is the human-machine in interface,which provides alarm information list,graph,sound and so on.The operator can view the alarm information which generated by the real-time alarm management module and response through the human-machine interface,with this module,you can flexibly configure an alarm message whether the alarm,whether the graph,whether the voice,whether displayed in the alarm list.The alarm save module save the alarm information which displayed in the alarm list,these information send the storage request,then the module responds to the request and stores the alarm information.When the real-time alarm management module synchronize the alarm information from the host machine to the standby machine,the alarm save module responds the alarm information query requests.