Centralized Disturbance Monitoring for Power System

Prasanth GopalakrishnaniPCGRID Workshop 2015

Automated Disturbance/Fault Record Collection, Monitoring & Analysis - Use Cases

DR Collection – Retrieve disturbance data from multiple vendor IEDs using a single / integrated retrieval system.

Common Configuration I/F - for all IED Tools

Data Conversion & File format support – Convert the vendor DR format to COMTRADE. Support IED formats from SEL, ABB, Siemens, Alstom and standard formats like IEC 103 DR Format and support for conversion of proprietary formats to COMTRADE

Centralized DR repository – Collect Disturbance data in COMTRADE format at the central server, on scheduled intervals as well as on exception basis

Application Interface – Provide for data exchange with applications for future analysis

Simultaneous Access – Transparent / Pass-through channel support for accessing the ports simultaneously for configuration and DR collection.

Device Management – Ability to manage large number of IEDs; monitoring and retrieving data through IP network without impacting the existing Utility IP Network Configurations.

Security - Communication interfaces should comply with security requirements like NERC/CIP as well as specific requirements like Data Diode support – to prevent any spurious writes to the IEDs

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1 Multiple vendor IEDs – Multiple protocols

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2 Dedicated device interfaces to manage disturbance collection

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3 Configuration Management from central system is very difficult and error prone

Conventional DR Architecture

SYNC DR Architecture

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1 Redundant Concentrators supporting all protocols

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2 Dedicated Terminal server – Optional restriction of Front port access only for the configuration

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3 Central software for managing the parameterization & configuration

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4 Secure VPN tunnels through which disturbance collection & configuration happens.

SYNC S/S Capabilities

At the substation, terminal servers and communication gateways are configured to connect to the IED's over serial or network protocols. The terminal servers provide network access to the serial ports. The gateways provide protocol driver support to retrieve the data from the IED's

The gateways are configured to poll the IED's at frequent intervals or on demand from the central system. The gateways and terminal servers also collect diagnostic information from the devices and IED's including availability of the IED's, the link status, the disturbance collection errors if any etc.,

The gateway also provide for conversion of proprietary data to COMTRADE format where-ever possible to be done in the gateway environment. The processed data is then transmitted to the Central System. If redundancy is required, the network at the S/S is configured for the same.

Security is provided by VPN between the gateway at the S/S and the central system

SYNC3000/SYNC2000 Transparent / Pass-through channel functionality provides data collection and relay management can be done through the same physical interface channel.

Simultaneous Data Access

Device Management

IP Management Schemes – IP Management for scalability with a private network & VPN

Healthcheck of gateways and terminal servers over SNMP

Configurable points, devices, ports and network equipments over SNMP

NERC/CIP Compliance

Audit Trail / Log

TLS based security as per IEC 62351

SSL VPN for device access

Redundancy Switchover Schemes – Hot Standby / Hot-Hot and Externally triggered switch over

SYNC – DR Central System Architecture

Ethernet

VPN Client Interface

Web ClientMonitoring Interface

IED ConfigFiles

Active PSES Web Server

Time SyncPSES HSB

Identification

Windows ClientConfiguration Interface

Events and AlarmsDisplay

User Managmnt

Active PSES DB

Active PSES Files

Extn SFTPClient

Interface

PSES ODBC Interface

Substation and IEDNavigation

IED Tools

VCOMInterface

TempRouting

TCPData

Serial Data

User Managmnt

PSES HSBIdentification

PSES DB Interface

Component Details – Contd...

Provides Tools' based Configuration Management Provides access to remote (serial and TCP) devices through TCP network User definable, Hierarchical representation of any System & User Custumizable view over the Web. Fully Featured User Management Supports Windows and Web Clients. Server applications on Windows & Linux. Inbuilt GIS Interface integrated with Google Maps Provides NMS info through SNMP Audit Trail - Provides entire list of User Activities in a searchable manner Configurable Alarm Categories in Web Interface DR Files download option from Web Interface

Configuration features (contd)

Configuration Management

• Configuration (parametrisation and protection configuration) of substaion IEDs from the central location

• Software supports multiple versions of the configuration tools of various vendor relays so that the same can be easily managed from the central system.

• Software has a database for storing the latest configuration files which are automatically uploaded from the specific relay.

• Supports version management of configuration files of IED's

• It also has a DR viewer and analysis system associated with the same which uses the COMTRADE files retrieved from the SYNC3000 and stored in the central DB.

• Automatic generation of Fault summary and intimation to concerned persons

• Do a centralized analysis

• Analyze Protection Relay operations (sequence, time, pickup)

• Analyze device operation anomalies (opening time mismatch)

• Verify correct operation of Protection schemes (Auto reclose, carrier aided)

• Maintains a centralized store of Faults, detailed offline analysis, Report generation

• Presents the Report in Standardized format

Fault Analysis Functions using DR Data

SYNC – DR Central System Capabilities

Control center supports a scalable data storage, network management and application development environment

Data Management & Alarms– Data storage / processing and retrieval– Device status information– Version Management of Config files

Application Server for hosting applications– Application Development Environment that enable users to build new applications

that work on the IED Data– Web applications for Configuration / User Management / Device Management

Virtual Environment for hosting proprietary configuration toolsDevice Management

– Device configuration– Device status information– Configuration Information– Network diagnostics, Alarms and Logs

Network Front End – NERC CIP support– SSL VPN– Configurable data transfer direction control

SYNC DR UI

Outage AnalysisOutage Analysis

Alarm AnalysisAlarm Analysis

Asset MonitoringAsset Monitoring

EDP & REN - PortugalPilots done in REN & EDP – Portugal's transmission and Distribution network

– EDP Pilot involved SYNC2000 communication with SPA, Courier, IEC61850 and GE Modbus relays and transferring the same to central system over GPRS.

– Loop impedance calculations for EDP – Loop impedance is calculated in SYNC3000 from COMTRADE files and values are transferred to central NMS System. By correlating this loop impedance with the network topology, fault is located.

– Qenergia & EDP presented a paper based on phase-1 project - FAST AND SECURE AUTOMATIC RETRIEVAL OF DATA FROM MULTI-VENDOR DEVICES-THE PORTUGUESE EXPERIENCE – for C I R E D, 22nd International Conference on Electricity Distribution, Stockholm, 10-13 June 2013

– REN Pilot involved redundant SYNC3000 architecture similar to PGCIL with relays from ABB, Alstom, Siemens and GE.

•The project involves around 200EHV substations, and more than 3000 relays / IEDs involving around 60 different relay models, and is the largest such asset monitoring project executed in the country's transmission network and is the largest such asset monitoring project executed in the country's transmission network.

•PGCIL, one of the largest transmission utility company in the world, with more than 95,000km Transmission network, set up a Remote Access and Automatic Fault Analysis System from each of its substation spread across an area of 2.5Mn sq.kms.

•The main functionalities of the system will include the automatic remote collection of the Disturbance Recording (DR) files, as well as Event Logs (EL) from the various devices / IEDs in the substations, and subsequent download to a central National Transmission Management Center, through five Regional Asset Management Centers spread across the country.

•The Utility will be able to remotely view, configure devices, collect disturbance and event data – hence, making it possible for the substations to be un-manned and operated / maintained remotely.

PGCIL, NTAMC - INDIA

National Transmission Asset Management Center (NTAMC) under PGCIL

Config InterfaceWindows based configuration and Monitoring interface

Monitoring InterfaceWeb Interface used mainly for monitoring

prasanthg@ase-systems.com