Real-Time Control Systems – Essential Market Support

Ing. Miroslav Konečný

Ing. Jiří MackůControl Systems Division

OSC, a.s.

Presentation for ISTI FORUM 2007

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Division of Division of EElectricity lectricity MMarket arket PParticipantsarticipants

Subjects of settlementthey are responsible for deviation against Electricity Market Operator caused by themselves or by their partners

The othersthey are not responsible for deviation against Electricity Market Operator, the deviation is a subject of the contract with their partner

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Division of Electricity Market MembersDivision of Electricity Market Members

Subjects of settlement:

settlement of deviations carried out directly by Electricity Market Operator

payment for deviation (power delivered or consumed beyond the terms of contract) – according to deviation settlement price

additional expenditures share for purchase of power for ensurance of grid balance

possibility of transferring responsibility for deviation to another subject of deviation settlement

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Division of Electricity Market MembersDivision of Electricity Market Members

The others:

they are not responsible for deviation against Electricity Market Operator (EMO)

consumption/delivery terms of contract

typically, bigger consumptions are monitored for a quarter-hour maximum

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Average Price of Power in Intra-Day Market (Average Price of Power in Intra-Day Market (EMOEMO))

daily averages in 2005daily averages in 2005(working days)(working days)

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Average Price In Spot Market (EEX)Average Price In Spot Market (EEX)

hour contractshour contractsin 2006in 2006

(September - December)(September - December)

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Active Approach to Power Flow ControlActive Approach to Power Flow Control

active approach to control of production/consumption (power flow) is a means of costs reduction

effective work with deviation – deviation payment reduction

overview of potentialities and immediate production/consumption status – reserve utilization possibility

conditions of implementation : technological: capabilities and equipment of production/distribution

technology

control: immediate overview of operation, obligations, potentialities, trade decision support

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Power Process MonitoringPower Process Monitoring

real-time data acquisition from power production/consumption

typical intervals of evaluation:

¼ hour, 1 hour, 1 day

maximal data acquisition scan

1 minute

trade period result prediction

is essential for well-timed

reaction

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Period Result / Deviation Prediction (1)Period Result / Deviation Prediction (1)

timely detection of low (on the left) or high (on the right) consumption/production

small power correction cancels out the deviation at the end of the period

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Prediction of Period Result – Deviations (2)Prediction of Period Result – Deviations (2)

timely prediction – large available target area – large deviation correction area

late reaction to deviation - deviation can not be eliminated

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Deviation Elimination Within the Trade Hour - an exampleDeviation Elimination Within the Trade Hour - an example

0 900 1800 2700 3600 4500 5400145

150

155

160

165

170

175

180

185

Time (s)

Pow

er

(MW

)Automatic power outage elimination

Scheduled powerPower setpointPower output

power balance restoration

trade period (hour)

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Process Data – Control Essential Process Data – Control Essential

control cycle:operation scheduling

production control

operation assessment

basis:

reliable, verified process data

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Means for Production/Consumption Control by OSCMeans for Production/Consumption Control by OSC

superordinate to individual SCADA systems

connected to: enterprise-level IT systems operation scheduling system authorities (EMO, TSO etc.)

basic parts: monitoring and production control

(OSCALC) balance, overview, market support

(OSCVANTAGE) process data acquisition

(TELE, DIGRAST)

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Example of Use for Power Production and DistributionExample of Use for Power Production and Distribution

OSCALCCentral System of Power & Ancillary Services Production Control

TELEPower Plant Terminal – Distributed Real-Time Unit

OSCVANTAGECentral Power Production Information System

DIGRASTPower Flow Management System

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Basic SBasic Syystem Functionsstem Functions

TELE, DIGRAST data acquisition, receiving commands from authorities, data for operation

assessment

OSCALC operation schedule handling operation monitoring, data aggregation prediction of trade period balance, automatic corrective intervention resource optimization (cost, dynamics, amortization,...)

OSCVANTAGE calculations, balances, overviews, analysis of technical indices operation assessment indices data exchange with control authorities (EMO etc.) analysis of technical scenarios, reserves, potentialities

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OSCVANTAGE – Power Production Information SystemOSCVANTAGE – Power Production Information System

Connections to other systems:

Serial communication:IEC 870, TG 809, Modbus, ...

Database access:

OLE DB, ODBC, JDBC, …

Data exchange: SOAP, XML, CSV, ...

User interface: Web, e-mail, files, ...

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Installations of OSC Systems in Central EuropeInstallations of OSC Systems in Central Europe

Real-Time Control Systems – Real-Time Control Systems – Essential Market SupportEssential Market Support

Thank you for your attentionThank you for your attention

Ing. Miroslav Konečný, Ing. Jiří MackůOSC, a.s.

Control Systems Divisiontel.: 541 643 130fax: 541 643 109

e-mail: konecnym@osc.cz, mackuj@osc.czwww.osc.cz