Project ReferenceUpper Kotmale Hydro power plant

Substations Automation Systems

The entire project covers an area of approximately 540 km2 and is developed in five phases.

One special feature of this project is that the line protections for Main 1 and Main 2 are from different manufacturers.

In Upper Kotmale substation the protection panels are located 800 meters underground, whereas the station level equipment is located above ground.

SolutionABB has been commissioned with supplying the IEDs, providing the engineering know-how, training the Colombo Electricity Board (CEB) engineers, and with providing remote support during commissioning. The company has delivered the protection and monitoring system of the substations Kotmale and Upper Kotmale.

The Upper Kotmale Hydro-Power Project (UKHP), in Talawakele in Central Sri Lanka is the third largest hydroelectric dam and the first station with IEC 61850 in Sri Lanka. Via the Gampola substation in the Atabage area a total capacity of 150 MW will be transmitted to the national grid.

ProjectThe Upper Kotmale Dam (also known as the Upper Kotmale Hydro-Power Project, or UKHP), located in Talawakele in the Nuwara Eliya District in the Central Province of Sri Lanka, is the third largest hydroelectric dam in the country. It is the first station with IEC 61850 in Sri Lanka. A total capacity of 150 MW will be transmitted to the national grid via the substation Gampola located in the Atabage area.

LocalIndustrial Computer

Public telephone network

Desktop Master Workstation(DMW)

GPSGlobal Position System clock

MEINBERGNTP Server

Managed Ethernet Switch

Laser colorprinter

Laptop Local Workstation (LLW)

Desktop Remote Workstation(DRW)

2 x 220kVLine

Protection

RED670

1 x 220kVCoupler & BBP

Protection

REB500CU

REB500 BUSys

REB500 BUSys

REB500 BU

REB500 BU

IEC61850-8

7SA5221

REB500 BU

To PMS Kotmale P/S

Disturbance Fault Recorder Desktop

Disturbance fault Recorder (Main)

SNTP-IRIGB Protocol Converter

UPPER GROUND

UNDER GROUND

REB500 BU Disturbance fault Recorder

(Remote-1)

Disturbance fault Recorder

(Remote-2)

Local & Master Workstation (LMW)

NSTP for MELCO SCADAIP Router

Modem

Modem Modem

Modem

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The solution for both stations consists of a MicroSCADA Pro system defined as Protection Monitoring System (PMS), communicating with the protection units via a IEC 61850 ring. A remote station communicating with both stations is installed in the Colombo Central Headquarters of the Ceylon Electricity Board.

Customer benefitThis is the first IEC 61850-based system in the country with remote monitoring from the protection head office in Colombo.

It features proven high-end technology for the line protection and bus bar protection systems fully compliant with the new global standard IEC 61850.

The CEB engineers were trained at ABB University in Baden, so that the customer can now on their own properly operate and maintain the protection system of the hydro power plants.

Scope of SupplyABB has delivered the line protection and bus bar protection cubicles and protection monitoring systems for two 220 kV line switchgears in the Upper Kotmale and Kotmale Hydro Power Plant stations consisting of Relion® and 3rd party devices:

Device Function

RED 670 Line differential protection

REL 670 Distance protection

REC 670 Autorecloser

REB500 Bus bar and breaker protection

REB500Sys Bus bar, breaker protection and cable differential

protection

7SA52 Relays (distance back-up protection)

Apart from that, ABB has delivered two Substation Automation Systems (SAS) for monitoring purpose consisting of one MicroSCADA Pro server with Master Local Workstation and Remote Workstation, Laptop Local Workstation, Satellite GPS receiver and Fiber Optic Ethernet Switches for the IEC 61850 network.

For more information please contact:

ABB Switzerland Ltd Power SystemsBruggerstrasse 72 CH-5400 Baden, Switzerland Phone: +41 58 585 77 44 Fax: +41 58 585 55 77 E-Mail: substation.automation@ch.abb.com www.abb.com/substationautomation

System Overview

Substation at the hydro plant