Alarms and Events - Processing and Logging Project Mentors Suneel Kumar Venugopal Vanga

Components of Alarm and Event Detection System  Value Generation (Simulation of field values)  Alarm and Event Monitoring  Alarm and Event Limit Check (Control)  Alarm and Event Reporting  GUI or Interface  Database and Data Logging

Field Values Simulation Values are generated by a random generator program (a simulator for the RTU). It generates random values according to the following format.  V_055_IIIT_001_24/02/2004_11:50 V,ICan be V/I etc V → Voltage I → Current 055Voltage level (55 KV here) IIITSubstation name 001Unique identifier 24/02/2004Date 11:50Time

Categorization of alarms/events: Depending on the value we can prioritize the alarm. Alarm levels of severity or Priority Level 0 Alarms → Audible + Onscreen Display in Red Level 1 Alarms → Onscreen Display in Blue Level 2 Alarms → Onscreen Display in Green Red Very Very High Alarm Very Very Low Alarm Blue Very High Alarm Very Low Alarm Green High Alarm Low Alarm

Display of alarms

Storage structure of Alarms in database Alarm Date and Time Acknowledgement Date and Time Message Value Alarm Type Alarm Id Device Name or ID Alarm status (Acknowledge / Unacknowledged) Name of the acceptor

Storage structure of Alarms in database Alarm Date and Time Acknowledgement Date and Time Message Value Alarm Type Alarm Id Device Name or ID Alarm status (Acknowledge / Unacknowledged) Name of the acceptor

Storage structure of Events in database Event Date Event Time Message Value Event Type Device Name or ID Event Id

Format of the file storing limits The file will have several lines of data. Each line would be of the form Scada Point Name Voltage/ Current etc. Alarm/EventLimitPriority of substation Priority for the alarm

Alarm/Event Monitoring The monitor program checks for alarms/events after every 2 seconds. It transfers the value to the Limit Check module.

Alarm/Event Limit Checks Checks for the limits associated with alarms/events. Depending on weather and other parameters limit checks are performed. If it is an alarm/event message is given to the GUI to display it

Alarm/Event Reporting Automatically report alarms/events in the interface. Automatically updates the interface. Maintaining the log report or record of the Events and Alarms of past days or weeks. The name of the operator who accepted the alarm along with date and time of clearance.

Alarm and Event Control System Functionalities or conditions for occurrences of Alarms and Events are defined, to detect the Alarm The alarm may be enabled or disabled for a particular time period or scheduled.

GUI: Display alarms/events according to priority and time as and when they arrive with their values. Allow user to acknowledge specific or all alarms. Allow user to attach messages or comment with each alarm/event he acknowledges or the alarms/events previously present into the database. Allow users to display the events for various time periods, by a particular SCADA point, priority etc. Allow users to sort alarms/events according to a category. Allow users to update the limits and store it in a file. Online help will be provided. User can search for alarms and events depending on their type.

Example of Sample Interfaces for Displaying Alarm

Database and Data Logging The database acts as a repository of each generated values and timestamp is fixed to each entry in database and these values are later analyzed and displayed for decision making mechanisms. The data coming from field is analog and stored in the database as both analog and digital with their type defined. Storage of Events related data in user defined format in database in minute, hourly, daily, weekly basis with its status The common practice for record keeping is to capture the Pre selected datasets at periodic intervals

PROCESSING: Login and Password Authentication Accept the username and password and validate it. Start the alarm/event simulator. Alarm/Event monitoring system collects the data from the Alarm/Event generator system after every 2 seconds. Limit Check module then checks the values and send it to GUI and logged into the database depending upon the range. GUI shows current alarms and events by getting values every two seconds. User acknowledges alarms and attaches messages to events and alarms. The following things can be done after the above steps  User edits limits and stores them back to the file  User searches for alarms and events.  User can update information already present

Tools Used: GUI: VC++ 6 Programming: C++ Database: MS Access

Thank you Group 16 Arvind Tiwary Ashutosh Parida L. Jagannathan Nitin Gupta