SUBSTATION AUTOMATION DESIGN SPECIFICATION
Server based software
The Server based software user interface is based on customary windows technology, which enables to navigate in the familiar Windows environment both when configuring the system and during operation. The Server based software Power Automation and Tele-control System set a new trend in the area of Tele-control and substation automation systems. Server based software is clearly structured and reliable, open, fully documented and tested system. Major functionality of server based software is to take the data from IEDs, monitoring the Ethernet switches in the network and monitor all the active devices in the network. i.e. Controller/Gateway is having IEC 104 Slave, and IEC 61850 drivers.
The Human-Machine Interface (HMI) for the Server based software and IEC 61850 devices. The proposed HMI system has redundant HMI in Switchyard control room for the purpose of monitoring and control of all substation devices. The redundant configuration of the HMI ensures that on failure of one server, the second server remains operational. The system remains smoothly in operation. After repair/replacement of the defective server, it again starts its workplace and synchronizes itself automatically as the standby server.
HMI comprises the following components:
- Graphic object library
- Alarm system extension
- Server based software wizard
- HMI functions
- HMI Normalization DLL
- Server based software channel DLL and IEC channel DLL
HMI software runs on MS windows operating System. The functionality of the HMI System includes collection of data available from the Server based software and depicts the same in a user-friendly manner to the operator. The offered HMI system provides real time, high resolution and interactive graphics display of the collected information, trending of logged analog parameters, creation of chronological event list, alarm list. HMI computer clock will be time synchronized by GPS Time server over SNTP.
HMI Software has extensive security features. Different level of access having a separate username and password authentication are provided to avoid any unauthorized activity. User will be able to generate hardcopy prints for alarms, events, reports, and trends on connected printer. The self-diagnostic feature of all the numerical relays i.e. IED’s is reported on HMI.
HMI offers standard function modules for the supervisory control and monitoring, real time indication of status, alarm processing, archiving and logging.
A large amount of information is required to be displayed for effective real time monitoring. This is done in the process visualization system HMI, which allows the distributed architecture facilities to achieve required smooth processing of real time monitoring of large substation data.
The operator on HMI communicates to various HMI displays which include Substation overview, voltage level overviews, communication connectivity, individual feeder displays, alarm list, event list, reports, trending.
The following are available from the HMI:
- Single-line diagram displaying the switchgear status and measured values.
- Control dialogues with interlocking or blocking information details. This control dialogue will tell the operator whether the device operation is permitted or blocked. Device is subjected to control blocking would be visible with a small square mark.
- Measurement dialogues
- Alarm list, station / bay-oriented
- Event list, station / bay-oriented
- System status
The status of all data points will be clearly visible in the HMI switched objects, as well as in a dialog box.
The HMI doesn’t consider the individual data-points, but the technological objects. That is the basic principle for the picture and data modelling, because a considerable simplification of the project’s planning procedures is thereby achieved and a repetition effect is reached through the use of the predefined models.
The status of all data points will be clearly visible in the HMI switched objects, as well as in a dialog box:
- HMI OK / NOT OK
- Not Topical
- Bay blocked
- Tele-control Blocked
Power fail auto restart facility with automatic time synchronization to GPS is provided in substation controllers and operator workstations. The process status of switchyards in terms of actual values of current, voltage, frequency, active and reactive power, as well as position of isolators , circuit breakers shall be displayed on station single line diagram.
Disturbance Monitoring and Analysis
Disturbance records shall be handled by DR software, which is a special view of fault analyzer. It will be loaded in DFR cum OES PC. The DR software accesses the fault record in COMTRADE format. All binary and analogue channels configured in the protection relays shall be displayed. Fault record archives store the fault records provided by the protection devices of a Server based software station. Each Server based software station will generate a fault record archive, and will update it at cyclic intervals from disturbance recorder and makes it available to DR software.
DR Software includes the following components:
- Fault analyzer serves for the display and evaluation of fault records
- DR Software accesses the archive and provides an overview of the network events.
Relay Configuration software
Relay configuration software originally launched as MS-DOS software. It was developed to become a convenient tool for setting numerical protection relays under MS Windows. Relay configuration software are the logical innovation for easy-to-use and user-friendly setting, commissioning and operation of all protection relays respectively. With a PC or Notebook, setting the relays via one of the interfaces and read out and visualize fault data is possible. Because of its modular design, Relay configuration software can be used economically depending on the respective requirements.
The relay configuration software professional has the following functions:
- Setting parameters and routing.
- Human-machine interface.
- Commissioning, controlling and testing.
- Communication via a direct connection.
- For creating and modifying default and single-line diagrams display editor are used.
- Add on software – for visualizing and evaluating fault records
- Relay configuration software remote – for remote controlling of relays via a modem connection
- CFC – for creating new functionality or for changing the predefined interlock condition.
- The downloading setting to IED’s restricted with password.
The HMI/Engineering PC will be connected to the same network of server based software. All the IEC 61850 relays can be accessed through Ethernet LAN connectivity.
Add on software for evaluating fault records
The Add on software application program supports the analysis of the fault records in the network. It offers a graphic display of the information recorded during the fault event and uses the values measured to calculate further variables, like impedances, outputs or R.M.S. values, which make it easier for operator/Engineer to research the fault record.
Parameters defining the fault record display are often saved permanently within the sort of User Profiles such as the distribution of signals to specific diagram views and tables, colour, line and font styles, etc. Additionally to the graphical representation, the values of individual signal at an outlined instant during a table also because the current positions also can be seen.
Following are the capability of EWS cum DR Workstation:
- Automatic upload, archive, review and graphical analysis of digital fault data available from BCU/BPU