GE Wind Energy

Overview of Windfarm CommunicationsUsing DNP3

NRELNovember 17, 2003

GE Company Confidential

Next Gen SCADA & Automation Program

Windfarm High Level Communications Requirements• Acquire quality and reliable real time and historical data on turbine and windfarm

operations• Integrating all windfarm assets’ data (substation, met mast, relays, meters…)

data into the system so one integrated homogeneous database for all windfarm assets

• Integrated data for remote monitoring and diagnostics, asset management, advanced diagnostics, condition based maintenance

• Allow for choosing “best-in-class” software and hardware• Optimize system maintenance & configuration processes and costs• Improved functional reliability… improved availability • Improved secure real time access to data… anyone, anywhere, anytime• Ability to reduce project configuration time• Support advanced security technologies

Windfarm High Level Communications Requirements• Acquire quality and reliable real time and historical data on turbine and windfarm

operations• Integrating all windfarm assets’ data (substation, met mast, relays, meters…)

data into the system so one integrated homogeneous database for all windfarm assets

• Integrated data for remote monitoring and diagnostics, asset management, advanced diagnostics, condition based maintenance

• Allow for choosing “best-in-class” software and hardware• Optimize system maintenance & configuration processes and costs• Improved functional reliability… improved availability • Improved secure real time access to data… anyone, anywhere, anytime• Ability to reduce project configuration time• Support advanced security technologies

GE Company Confidential

Next Gen SCADA & Automation Program

Windfarm LAN Protocol Requirements• Flexible polling schemes, ability to poll by device, by class, by database points,

unsolicited (report by exceptions)• Multimedia: seamless integration across multiple physical media: Ethernet, serial,

radio licenses / unlicensed RF, phone, …• Seamless integration across corporate LAN / WAN and Intranets / Internet• Supported by multiple vendors, open, well documented, deployed in the field• No significant processor requirements on slave devices (low overhead)

Windfarm LAN Protocol Requirements• Flexible polling schemes, ability to poll by device, by class, by database points,

unsolicited (report by exceptions)• Multimedia: seamless integration across multiple physical media: Ethernet, serial,

radio licenses / unlicensed RF, phone, …• Seamless integration across corporate LAN / WAN and Intranets / Internet• Supported by multiple vendors, open, well documented, deployed in the field• No significant processor requirements on slave devices (low overhead)

SCADAnet

Intranet

Historian User

Historian Server

Remote User

EMS

Router

Operations Control Center

SCADAControl

Ethe

rnet

Backup

Radio

GE Company Confidential

Next Gen SCADA & Automation Program

Future Protocol Requirements• Self description, auto-configuration• Device based object models• Access security: encryption• Peer to Peer communications

What to Watch Out for..• Still a lot of low bandwidth systems… the “last mile” scenario• Cost of implementation, learn from experiences of electric utilities with UCA, IEC 68150, millions of $$

have been and still not widely adopted by the industry• Is the protocol stack too heavy for simple devices… processor requirements, $$• Size, complexity and licensing issues of the protocol stack• The learning curve for a complex protocol for windfarm implmentors

Future Protocol Requirements• Self description, auto-configuration• Device based object models• Access security: encryption• Peer to Peer communications

What to Watch Out for..• Still a lot of low bandwidth systems… the “last mile” scenario• Cost of implementation, learn from experiences of electric utilities with UCA, IEC 68150, millions of $$

have been and still not widely adopted by the industry• Is the protocol stack too heavy for simple devices… processor requirements, $$• Size, complexity and licensing issues of the protocol stack• The learning curve for a complex protocol for windfarm implmentors

GE Company Confidential

Next Gen SCADA & Automation Program

GE Wind Energy’s Implementation of DNP3

• GEWE required a windfarm LAN protocol that was already deployed, well documented and supported by companies (source code, OPC drivers, test sets, defined subets, etc…)

• DNP3 met these requirements, today

• Promised migration path for future enhancements

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Next Gen SCADA & Automation Program

History of DNP3• Distributed Network Protocol, completely open protocol, extremely well documented and supported, has reached a

level of maturity that makes deployment risk-free

• Based on early parts of IEC 870-5

• Turned over to Users Group in 1993

• DNP and IEC 870-5-101 have been specified in IEEE P1379Recommended Practice for Data Communications Between Intelligent Electronic Devices and Remote Terminal

Unit

DNP3 protocol is now the most popular protocol in use by global electric utilities

DNP LAN implementation leads the way for use by both North American and international utilities.

• Vendor Products

- >100 vendors, +250 DNP products and services, global

• Utilities/Industrials

- used by >300 utilities and industrials worldwide

• Countries

- used in over 32 countries. National standard in many

• Total Industry

- $250 Million / year of DNP products and services

• Industries

- Electric, Oil & Gas, Water and Industrial

• DNP Users Group: >300 active members, controlsthe protocol and migration, support web site, active Technical Committee, evolving documentation, technical bulletins

www.dnp.org

GE Company Confidential

Next Gen SCADA & Automation Program

PowerLink Client

GUITelephone Co.Dial Up Network

SCADA/EMS Masters

Ethernet LAN

IED at circuit breaker

Fibre Optic Cables

Bridge/Router

Outdoor Locations

Server/Gateway

RemoteCommunications

Controller

D25

I/O

I/O

To Enterprise

GUI

WANGPS Receiver

GUI

SLIP/PPP

PowerLink Clients

Redundant PowerLink Server

I/O

IED's forProtection

IED’s

I/O

DigitalFault

Recorder

I/OI/O

Controls

Analogs

AC inputs

DistributedI/O

Status

Remote SER/DFR Master or Maintenance

Computer

DNP3 in Substation LAN

Deployed in many hundreds of substations around the world by many vendors

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Next Gen SCADA & Automation Program

MET Tower

Wind Turbines with “Turbine Communications Server”

Switch / Router

Turbine Communications

Server

Bachmann Controller

Converter

• Embedded PC platform… no hard drive or fan• Linux operation system, embedded web server• Real time interrupt driven database manager• Polls data from wind turbine intelligent devices (Controller, meters, intelligent

sensors, etc.)• Secondary data processing, compression, alarming• SQL database for local data archiving• DNP3 server for real time mission critical data• ODBC server for historical data• OPC client or server for interface to other devices

Substation

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Next Gen SCADA & Automation Program

Wind Farm Operations Center

SCADA Master / Server

Web Access, Remote

Configuration, File Transfer, ODBC

Web Access, Remote

Configuration, File Transfer, ODBC

Pager, Email or SMS Operator Alarms / Reports /

Notification

Pager, Email or SMS Operator Alarms / Reports /

Notification

User interface, trending, alarming, reports, SQL server

GPS Time Sync

WAN / Internet / Dial-In

Backup Access

• Graphical User Interface Screens•Park / Turbine overview: animated•Annunciator•Communications network overview, alarms•Configuration screens

• SQL Database

• Report Generation

• Real Time or Historical Trending

• Alarm Management•Email, SMS, voice, fax

• Remote User Interface

• Communications to Windfarm•DNP3 for real time mission critical data•ODBC for historical data•High configurable and “tunable”

SCADA Master Station

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Next Gen SCADA & Automation Program

485.6 AMPS

Utility Gateway

Utility SCADA / EMS / RTA / ISO….

(Multiple)

Utility SCADA / EMS / RTA / ISO….

(Multiple)

10/100 Mbit LAN – DNP3/TCP/IP - ODBC

Substation

Substation Meters, Relays,..

Wind Farm Operations Center

Scada Protocols•DNP3•IEC 60870-5-101•UCA•Others

MET Tow er

Wind Turbines with “Turbine Communications Server”

SCADA Master / Server

Web Access, Remote

Configuration, File Transfer, ODBC

Web Access, Remote

Configuration, File Transfer, ODBC

Pager, Email or SMS Operator Alarms / Reports /

Notification

Pager, Email or SMS Operator Alarms / Reports /

Notification

485.6 AMPS

User interface, trending, alarming, reports, SQL server

GPS Time Sync

Switch / Router

Turbine Communications

Server

Bachmann Controller

Converter

WAN / Internet / Dial-In

RCC Gateway

GEWE Remote Control Center

GEWE Remote Control Center

Backup Access

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Next Gen SCADA & Automation Program

DNP3 and IEC 61400-25

• Many members of the DNP Technical Committee also on IEC 61850 committee

• Many discussions ongoing regarding migration / melding of DNP3 and 61850

• 61400-25 can leverage from these activities, many similarities and much larger focus ($$) associated with 61850 activities and years of work

• DNP3 and 61400-25 can run concurrently on the same physical LAN, an ideal migration strategy

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Next Gen SCADA & Automation Program

Substation Automation after IEC 61850

Bay Controller

CTs PTs Primary Equipment Monitors

Self-Configuring Web Server

Firewall/ Router

Browser Laptop

HMI HMI withPower-Assisted Configuration

To WAN

To Legacy Masters

CTs PTs

CTs PTs

Bay Controller

Sampled Values

Interlocking/ Tripping

Gateway/ Coordinator

Client/ Server