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INTERNATIONAL DRAFTDRAFT
ESBI Workshop on OC October 9th-10th 2000
Presenters John Kennedy & Meadhbh Flynn
INTERNATIONAL DRAFTDRAFT
ESBI Workshop on OC October 2000
Agenda for the next two days
Using the User Guide to Grid Code we will make presentations covering
General Conditions Connection Conditions Planning Conditions and Planning Code Appendix Operating Codes 1-13 Special Dispatch Codes1-3 and Appendix Glossary
INTERNATIONAL DRAFTDRAFT
ESBI Workshop on OC October 2000
The Format of the Presentations
Users Guide
Construct Flowchart of actions and events
“Breakout Groups” - to discuss issues and make changes
Use of flipcharts to capture unanswered questions and suggested changes
Role play of events to achieve better understanding
Plenty of time for Questions and Answers
A short post-workshop report will issue to tie-up outstanding issues
INTERNATIONAL DRAFTDRAFT
HTSO DSOTransmission Owner (PPC)
Suppliers CDGUs Non CDGUSmall Scale
Generators
Special Units
External System Operator
GC General Conditions b b b b b b b b r
CC Connection Conditions b b b r b b b b r
PC Planning Code b b b b b b b b r
OC1 Safety Co-ordination b b b b b b b b r
OC2 Information Exchange b b b r b b b b r
OC3 Metering Code b b b b b b b b bOC4 Demand Forecasts b b r b b r r b r
OC5 Demand Control b b r b r r r r r
OC6 System Services b b r b b >2MW r b r
OC7 Interconnector Management b b b b b r r b bOC8 Generator Maintenance Scheduling b b r b b r r b r
OC9 Transmission Maintenance Scheduling b r b r r r r r r
OC10 Monitoring, Testing and Investigation b b b b b >10MW b b r
OC11 Operational Testing b b b r b >2MW r b r
OC12 Emergency Control & Power System Restoration b b b r b >2MW r b r
OC13 Small Scale Generator Conditions b r r r r b b b r
SDC1 Generator Scheduling b b r b r r r b bSDC2 Generator Dispatch b b r b r r r b bSDC3 Special Scheduling Provisions b r r r r r r b r
Glossary b b b b b b b b b
Code
INTERNATIONAL DRAFTDRAFT
Purpose of Operating Code
Fundamentally a technical document containing the Rules governing the Operation, Maintenance, and development of the Transmission System
Gives Users an understanding of the Rules and provides for equitable treatment for all.
It refers to documents that are not part of the Operating Code e.g. transmission planning criteria, operating policies, interconnection
It does not address commercial issues
- penalties
-violations
-failure of services These are dealt with in other agreements
INTERNATIONAL DRAFTDRAFT
Hierarchy of documents
SafetyRules
UCTEStandards
GreekStandards
Standards
TransmissionPlanningCriteria
Reserve Policy
Policies
Operating CodeCompliance
Test
Power SystemRestorationProcedure
Procedures
Otherdocumentation
OperatingCode
Licences
Legislation
AncillaryServices
Agreements
PowerExchange
Code
INTERNATIONAL DRAFTDRAFT
Precedence of Definitions
Importance of common understanding Hence a Glossary is included If a Term is Defined in the Operating Code it will take
precedence over the definition in the Glossary
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Governance
The Operating Code is a “living” document - it is subject to changes
Approved by RAE -brings it into being
Modifications, Updates, Derogation requests, will be approved by REA - keeping it alive
INTERNATIONAL DRAFTDRAFT
General Conditions
Makes provision for rules of a more general nature making a cohesive document allowing the operation of the transmission System for the benefit of all
Requirement of HTSO to establish and maintain the OCRP Allows derogation rather than changes to design specifications General Conditions requires users to comply with the”letter &
spirit” of the code and provides HTSO with its rights HTSO will act reasonably - “Prudent Utility Practice” It should be
noted that if there a conflict between Operating Code and any other agreement the provisions of the Operating Code will prevail
If parts of the Operating Code unlawful/invalid the validity of all remaining provisions will not be affected
INTERNATIONAL DRAFTDRAFT
Connection Conditions
To protect plant certain minimum criteria are met
- technical
- design
- operational These are defined in Connection Conditions This is to allow stable, secure operation of the transmission
system Compliance required from all users Performance of the transmission system at the connection point
to enable new users to design their equipment For existing plant derogation will be through REA
INTERNATIONAL DRAFTDRAFT
CC Overall Structure
T ran sm iss ionS ys te m P e rfo rm a n ce
H T S OC C .8
T ra n sm iss ionC o m p ou nd
C C .4
P la n tD e s ig na tio ns
C C .5
G e ne ra ls ta n da rds
C C .6
C C 7 .1 -2E a rth in g ,L o ck in g ,
D e s ig n , C a b ling / w iring G rid C o nn e c te d Tra fos
C C 7 .3G e n era to rs
M in . p e rfom an ce sta n da rdsR e serve , R e a ctive po w e r, e tc.
S p e c if ics ta n da rds
C C .7
C C 1 0 .1 -8 C C 1 0 .9G e n era to rs
C C 10 .10D S O
C C 10 .11G C C
C C 1 0.1 -11U se r P ro te c tion
C C 10 .12Q u a lity
P ro tec tio n / Q u a lityC C .10
S ig n a ls
C C .12
P o w er S u pp lies
C C .13
S tan d ardsfo r Users ' Plant
M eter ingC C .9 a n d M ete ring
C o de
C o m m un icationC C .1 1 a n d O C .2
S afe tyC C .14 an d O C 11
C o m m iss ion ingC C .15
C O N N EC TIO N C O N D ITIO N S
INTERNATIONAL DRAFTDRAFT
Planning Code
Planning code is necessary to allow development of the transmission system
- demand growth
- new connection
- development of existing facilities
Planning code allows HTSO/User interaction covers
- performance impacts on either side
- information requirements of HTSO to allow
it plan according to criteria and standards
- Prepare Forecast statement
INTERNATIONAL DRAFTDRAFT
Planning Code- Outline of application procedure
Complex Connection?
User applies to HTSO for connection
HTSO sends Connection Offer to User
HTSO requests more data from User
User sends Preliminary
Project Planning Data to HTSO
HTSO carries out further analyses
HTSO sends revised Connection Offer to User
User accepts offer?
User sends Committed Project Planning Data to HTSO within 60 days
HTSO and User signs Connection Agreement
Yes
HTSO publishes Forecast Statement and Use of System Tariffs
Yes
Connection Offer lapses if unaccepted
by User before Connection Offer
Expiry Date
No
No
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Operating Codes (OC)
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OC1 Safety Co-Ordination
“Safety First” and so it is with the Operating Code OC1
Establishes the requirement of HMSO (or agents) as well as users ( or agents) to operate in accordance with approved Safety Rules. It is assumed that PPC’s will apply to everyone
Other rules allowable if complying with all national/international and legal requirements
Applies to interconnected systems
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OC2 Information Exchange
This Code deals with
- notification of event and event reporting
- operational communication an data retention
Pre-connection communication is covered under Connection Conditions
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OC2- Overall structure
N o tif ica tionO C 2.1 .5
F o rmo f N o tif ica tion
O C 2.1 .6
R e cord ingO C 2.1 .7
T im in gO C 2.1 .8
O p e ra tio nsO C 2.1 .4 -8
N o tif ica tionO C 2.1 .9
F o rm o f N o tifica t ion
O C 2.1 .10
P ro v is iono f fu rth e r
In fo rm ationO C 2.1 .11
R e cord ingO C 2.1 .12
T im in gO C 2.1 .13
E v en tsO C 7.1 .4 ;
O C 2.1 .9 -13
N o tifica tio n ofE ven ts & E ven t R ep o rting
O C 2 .1
H T S OO C2.2.4.1
G e n era to rsO C2.2.4.2
G ridC o nn ec tedC u s to m e rs
O C2.2.4.3
D S O
O C2.2.4.4
C o n ta c t Lo ca tio nsO C 2.2 .4
C o m m u n ica tionF a c ilit ie sO C 2.2 .5
C o m m u n ica tionb e tw e en
H T S O & U serO C 2.2 .6
D a ta & N o ticesO C 2.2 .7
D a ta R e te n tionO C 2.2 .8
O p era tion a l C o m m un ica tion& D ata R e ten tion
O C 2 .2
O C 2 IN FO R M ATIO N EXC H AN G E
All Users
Generators
DSO
Grid Connected Customer
HTSO
INTERNATIONAL DRAFTDRAFT
OC3 Metering Code
For settlement purposes imported and exported MWh and MVArh are measured at defined points
OC3 specifies the minimum technical, design and operational criteria for metering and data collection
The Settlement System provides for payments due Metering is provided by HTSO and DSO and will be
registered in an appropriate system
INTERNATIONAL DRAFTDRAFT
OC 4 Demand Forecasting
Demand forecasting will be required over different time scales
- Operational Planning
- Programming
- Control
- Post Control Exact HTSO responsibilities yet to be determined Anyway will require typical profiles from DSO for defined
categories of day type. HTSO will define these day types Unnecessary duplication can be avoided by using information
delivered under SD1 for centrally dispatched and embedded generation
Pumped storage generation treated as negative generation Possible agreements required with external TSOs
INTERNATIONAL DRAFTDRAFT
OC4 Summary of information needed
Phase Programming Control Post ControlTime relative to Dispatch Dayfor which information required
Year ahead (Year +1) 2 weeks - 8 weeks ahead 2 days -12 days ahead 1 day ahead Day following dispatch day
Time for submitting information Week 22 of Year 0 10.00 each Tuesday 11.00 each Thursday 10.00 each day 08.00 each dayDSO
Demand at Supply points Hourly Hourly Hourly Hourly HourlyAnticpated demand control >10MW Hourly Hourly Hourly Hourly HourlyMW profiles for embeddedgeneration units > 10MW Daily Hourly Hourly Hourly HourlyMW profiles for embedded generation sites > 5MW Weekly Daily Daily Hourly HourlyMW profiles for criticalembedded generation sites >2MW Weekly Daily Daily Hourly Hourly
Suppliers:Demand at Supply points Hourly Hourly Hourly Hourly HourlyAnticpated demand control >10MW Hourly Hourly Hourly Hourly Hourly
Interconnector HourlyGenerators Hourly
Operational Planning
INTERNATIONAL DRAFTDRAFT
OC4 Information for Demand Forecast
Operational Planning PhaseUser Information
Post Control PhaseUser Information
HTSO conductsdemand forecasting
Historic Data
Userinformation
Transmission losses
System Events
Otherinformation
Programming PhaseUser Information
Control PhaseUser Information
INTERNATIONAL DRAFTDRAFT
OC5 Demand Control
Operator must feel comfortable with methods employed in Demand Control - Empowered to act
The operator should have extensive knowledge of control methods and act quickly in emergencies and if necessary break the rules if needed
Mainly DSO will act on behalf TSO - contact between suppliers and customers will need to reflect the necessity of demand control
There may be tariff arrangement that allow for a higher risk of disconnection
Exemptions - need arrangements in place
INTERNATIONAL DRAFTDRAFT
OC5 Overall structure
Rota LoadShedding Plan
(If suffic ientnotice)
AlternativePlan
(If insufficientnotice)
ESBNG InstructedDem andControlOC5.4
Autom atic LowFrequency Dem and
DisconnectionOC5.5
Autom aticFrequancy
RestorationOC5.6
Autom atic LowVoltage Dem andDisconnection
OC5.7
Dem and Control
INTERNATIONAL DRAFTDRAFT
OC5 Demand Control
Provision will be made for
- Customer Demand reduction instructed by HTSO
- Automatic low frequency demand disconnection
- Automatic low voltage demand reduction
- Automatic Demand Restoration
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OC6 System Services
System services for network control and operation now more formalised (payments and measurements)
HTSO will manage these services and will specify what services will be provided and by whom
Generator licences must have a requirement to provide certain services on reasonable terms
Services include - Frequency control Voltage control Network control Operating Margin and Power System Restoration
INTERNATIONAL DRAFTDRAFT
OC7 Interconector Management
Interconnector management is part of prudent system control
OC 7 facilitates secure trading with neighbouring utilities
Trading planned over three day time frame requiring posting of Available Transmission Capacity (ATC) and then allowing Independent and Franchise sectors access
Reserve sharing and restoration services should be covered by bilateral agreements
INTERNATIONAL DRAFTDRAFT
OC7 Summary of procedure
USER
HTSO
ATC determinationCalculate Total
Transfer Capabilityand TransmissionReliability Margin
before 16.00(in consultation with
relevant ExternalSystem Operator
Independent sectoraccess
Submit request forinterconnector access
before 11.00
Franchise sectoraccess
Remaining Capacitymay be used to
trading on behalf ofGreek franchise
market
ExternalSystem
Operator
Independentsector access
Process allpreviously
granted requestsfor
interconnectoraccess
D-2D-3 D-1
ATC postingPost TotalTransfer
Capability andTransmission
Reliability Marginon web before
17.00
Independentsector access
Respond torequest for
interconnectoraccess before
14.00
Independent sectortrading
Submit schedules forinterconnector trades to
HTSO before 10.00
Independent sectortrading
Process interconnectortrades received before
14.00
Independentsector trading
Prepareinterconnector
transferschedule
InterchangeScheduleManage
interchangeschedule so thatinterconnector
transfer scheduleis met ahead of
franchise markettrading
InterchangeSchedule
Co-ordinatewith External
SystemOperator insetting finalinterchange
schedule
SDC1 andSDC2
Schedulingand
dispatch
Userfollows
schedulingand
dispatchinstructions
INTERNATIONAL DRAFTDRAFT
OC8 Generator Maintenance Scheduling
The role of HTSO not clear yet in the new environment
- will still have to produce a Transmission outage
Programme
- maintain capacity adequacy
- ensure system security
- Areas of special constraints
- produce timely information to market participants
INTERNATIONAL DRAFTDRAFT
OC8 Generator Maintenance Scheduling
Schedule time frames 1- 5 years
- Indicative Outage Programme (4 -5 years)
- Provisional Outage Programme (2 - 3 years)
- Committed Outage Programme (year 1)
HTSO approves outages from a security point of view Obligation on Generators to move outages Need to develop mechanisms for dispute resolution
INTERNATIONAL DRAFTDRAFT
OC8 Summary
C o m m itted O u ta ge P ro g ram m eY e a r 1
P ro vis io na l O u ta ge P ro g ram m eY e a rs 2 -3
In d ica tive O uta g e P rog ram m eY e a rs 4 -5
Generator Outage Program meYears 1-5
INTERNATIONAL DRAFTDRAFT
OC8- Procedure when HTSO requests change to COP
HTSO requests Generator to change COP
Amend COP COP not amended
Generator agrees Generator has reasonable case for declining request
HTSO accepts conditions
HTSO does not accept conditions
Generator agrees subject to conditions
INTERNATIONAL DRAFTDRAFT
OC8- Procedure when Generator requests change to COP
Amend COP
Cap
acity
ad
equ
acy
OK
No
amen
dmen
t to
G
ener
ator
's
prop
osal
HTSO evaluates effect on Capacity
Adequacy
Capacity adequacy not
OK
Generator prepares new proposal for change to COPGenerator requests change to COP
Generator takes forced
outage for unit
HTSO and Generator discuss modification
to Generators proposal
HTSO informs Generator
COP not amendedGenerator makes
change to Declaration of
Availability
INTERNATIONAL DRAFTDRAFT
OC9 Transmission Maintenance Scheduling
Maintenance year runs from July 1st- June 30th Schedule time frames 1- 5 years
- Indicative Transmission Outage Schedule (3 -5 years)
- Provisional Transmission Outage Schedule (year 2)
- Committed Transmission Outage Schedule (year 1)
INTERNATIONAL DRAFTDRAFT
OC9 Transmission Maintenance Scheduling First Business Day of July, TO gives HTSO:
– the CMPR for Maintenance Year 1 (MY+1)– the PMPR for Year MY+2– the IMPR for MY+3 to MY+5.– the start date and time and the duration of each Outage.
TO should avoid a situation arising in which the TO is obliged to schedule an Outage at short notice
In rolling over the Transmission Outage Programme Requirements from one year to the next TO shall not be constrained in making any submission by any previous IMPR.
1 July - 31 August of MY, HTSO does security analysis of MY+1 to MY+5 in light of proposed Outages and other relevant matters including Outages of Generation Units, Interconnection and load growth.
HTSO will highlight any concerns with the Transmission Outage Programme Requirements to TO by the end August in MY.
31 Aug - 30 Sept: HTSO and TO discuss any concerns
INTERNATIONAL DRAFTDRAFT
OC9 Transmission Maintenance Scheduling
The HTSO shall issue to TO a Transmission Outage Schedule for Maintenance Year MY+1 to Maintenance Year MY+5 by the fifth (5th) Business Day of November in Maintenance Year MY, comprising
– the Committed Transmission Outage Schedule (CTOS) for Maintenance Year MY+1
– the Provisional Outage Schedule (POS) for Maintenance Year MY+2
– the Indicative Outage Schedules (IOS) for Maintenance Years MY+3 to MY+5.
INTERNATIONAL DRAFTDRAFT
OC9 Overview
C o m m itted T ran sm iss ion O uta g e S che d u leY e a r 1
P ro v isio n a l T ra nsm issio n O u ta ge S che d u leY e a rs 2
In d ica tive T ran sm iss io n O uta g e S che d u leY e a rs 3 -5
Transm ission Outage SchedlueYears 1-5
INTERNATIONAL DRAFTDRAFT
OC9 Outline procedure
TO SubmitsMaintenanceProgrammeRequirements
HTSO MonitorRequirements
HTSO studyrequirements Feasible
ScheduleAvailable
Produce firmschedule
HTSOPropose
Alternatives
ScheduleAdministrator
Yes
No
TO ReviewSchedule
TO agreesschedule
CloseAgreement
TO does notagree
schedule
TO RevisesRequirements
Agree
Disagree
Arbitration possible following first iteration
Next Page
INTERNATIONAL DRAFTDRAFT
OC9 Outline procedure
Previous
Page
HTSOProposealternatives
Presentalternatives to
TO
TO judgesalternativesare feasible
Agree andClose
TO judgeSalternatives
are infeasible
TO ProposesAlternatives
HTSOReceivesproposal
HTSOevaluatesproposal
Accept TOproposed
alternatives
TO proposedalternatives
not acceptable
HTSOPropose
AlternativesSuggest to
TO
TO Accept Close and end
TO proposealternatives
HTSO imposesolution
HTSOevaluatesProposal
INTERNATIONAL DRAFTDRAFT
OC10 Monitoring Testing and Investigating
For HTSO to discharge its duties for safe secure and economic operation there is a need to carry out monitoring testing and Investigation of User’s Plant
HTSO is to ensure compliance with Operating Code and needs to establish agreed procedures separate from the Operating Code
OC10 does not apply to Operational testing but check that users are within their design, operating and connection requirements
Methods to deal with disputes are required
INTERNATIONAL DRAFTDRAFT
OC11 Operational Testing
Covers responsibilities and procedures to arrange and carry out Operational Tests - these test can affect HTSO and Users
Central co-ordination required since there will be implications foe security quality continuity and economic operation
Tests required by HTSO or Users
- Requesting
- Evaluation
- Approval
- Scheduling
- Dispatching
- Reporting
- Disputes
INTERNATIONAL DRAFTDRAFT
OC11 Summary part 1 of 2
TESTPROPOSER
HTSO
OPERATIONALLYAFFECTED
USERS
RAE
OC11.6 Request Operational TestSubmit proposal to HTSO in line with OC2
OC11.7 Evaluaterequest for
operational testAdvise Operationally
Affected Users
OC11.7.2 Request for OperationalTest
Assess impact on system and users
OC 11.8 Approval forOperational TestReject or accept
Accept
OC11.5 Test required by User Draw up Test Proposal
OC11.4 Test requiredby HTSO
Draw up test proposal
OC11.7.2 Evaluate request foroperational testAssess impact
Reject
INTERNATIONAL DRAFTDRAFT
OC11 Summary Part 2 of 2
TESTPROPOSER
HTSO
OPERATIONALLYAFFECTED USERS
RAE
OC 11.8.3 Approvalfor Operational Test
Send proposeddispatch procedure
and schedule for testto test proposer and
operationally affectedusers
OC11.8.3.1Approval forOperational
TestAccept or reject
proposeddispatch
procedure &schedule for test
OC 11.8.3.3Approval forOperational
TestNotify
operationallyaffected users ofacceptance bytest proposer
OC11.8.3.1Approval forOperational
TestNotify HTSO
of acceptance
Accept
OC11.9Schedule
OperationalTest
Send offer toHTSO for test
in line withSDC1
OC11.10Dispatch
OperationalTest
Follow dispatchinstructions fortest ( SDC2)
OC11.10Dispatch
OperationalTest
Dispatchinstructions totest proposerfor test in line
with SDC2
OC11.11Test
ReportingSend toHTSO
OC11.10.3 DispatchOperational Test
Cancellation of test forsystem reasons by HTSO
OC 11.8.3.4Approval for
Operational TestAssess impact-
appeal to HTSO ifunacceptable
OC 11.8.3.4 Approval for OperationalTest
Assess if operationally affected usershave reasonable grounds for rejection of
proposed test
OC11.12 Approval forOperational Test
Appeal to RAE
OC11.12 Disputesresolution
Reject
No
OC 11.8.4Approval
forOperational
TestReject Test& notify Test
ProposerYes
Reject(from Fig 13)
OC 11.8.4 Approval forOperational Test
Amend proposal or appeal to RAE
App
eal t
o R
AE
Amend
OC 11.8.3.3Approval for
Operational TestDiscuss alternative
with HTSO
Reject
OC11.10.3 DispatchOperational Test
Discuss revised Test with TestProposer
Accept(from Fig 13)
INTERNATIONAL DRAFTDRAFT
OC12 Emergency Control and Power System Restoration
OC12 is to ensure that after a partial or total system collapse normal supply is restored to all customers quickly and safely
Generator licences include a provision to offer black start capability to HTSO ( this can be tested under OC10)
Various proposed System Alerts are presented
An up to date Power System Restoration Plan is Required
INTERNATIONAL DRAFTDRAFT
OC12 Emergency Control and Power System Restoration
A m b er R ed B lue
S ys te m A le rtsO C 1 2 .4
P o w e r S ys temR e s tora tion
O C 1 2 .5
D e -e ne rg isa tiono f U se r's P la n t
b y H T S OO C 1 2 .6
E m erg en cy C on trol& Po w er S ys tem
R esto rationO C 12
INTERNATIONAL DRAFTDRAFT
OC13 Small Scale Generator Conditions
Small scale generation is defined by HTSO as less than 5MW for a single site
Some sections of Operating Code do not apply Some important codes still apply like OC8
Operational Planning. Here the HTSO needs information like seasonal load factors and running patterns.
OC13 deals with– Outage Scheduling - Changes to the Committed
programme - information to be notified – Network control
INTERNATIONAL DRAFTDRAFT
Scheduling and Dispatch Codes
SDC Codes
INTERNATIONAL DRAFTDRAFT
SDC1 Generation Scheduling
HTSO obligation to to schedule and dispatch generation
HTSO requires accurate and timely information relating to generation and supply
SDC1 specifies procedures for issuing a generation schedule for a trading day and Demand forecast
Thus generator receive an indicative dispatch for the following day and thus be available for operation
HTSO maintains an operating margin desired flows on interconnections
INTERNATIONAL DRAFTDRAFT
SDC1 Generation Scheduling
General Requirements
- Demand Forecast
- Declarations by Generators
- Daily Nominations
- Communication of Declarations
- Communication of Daily Nominations
- ATC for interconnections
- Production of Generation Schedule (GS)
- Procedure in absence of a daily nomination
INTERNATIONAL DRAFTDRAFT
SDC1 Generation Scheduling
SDC1.4
The HTSO publishesdemand forecast for next
dispatch day by 11.00
SDC1.5-1.6Generators
sendDeclarations
and DailyOffers for nextDispatch Day by 12.00
SDC1.8Exporting
Purchaserssend
Nominationsfor next
Dispatch Dayby 12.00.
SDC1.10
The HTSO producesschedule between 13.00 and16.00 for next dispatch day
SDC1.10
The HTSO issuesprovisional running orders and
publishes forecast systemmarginal price for each dispatch
hour of next dispatch day
INTERNATIONAL DRAFTDRAFT
SDC2 Generation Dispatching
HTSO licence obligation to dispatch generation to meet demand
A structured process is required SDC2 details the process to be used by HTSO
decides the generation dispatch using the generation scheduled provided
HTSO procedure for communicating dispatch instructions - some details will depend on Market protocols
INTERNATIONAL DRAFTDRAFT
SDC2 Summary
The HTSO forecasts Demand, sets reserve level and agrees ATC on interconnectors with External System Operators. HTSO issues dispatch instructions up to real time
The HTSO issues dispatch instructions up to real time
Accepted by
Gen?
Inform HTSO-must be for safety or
emergency reasons
Yes
No
Synchronising, desynchronising
times
Active Power Dispatch
System Alerts
Instruction in line with
operating characteristics? Inform HTSO
No
Revise
instruction
Reactive Power
Dispatch
System Emergency Conditions
Operating Mode
Dispatch
INTERNATIONAL DRAFTDRAFT
SDC2 Dispatch Instructions: Synchronise/ desynchronise
Yes
Synchronising , desynchronising times
Can synchronise within 10 mins.
instructed time?
Synchronise
Effective redeclaration
Can synchronise between 10 mins.
& 4 hrs. instructed time?
Issue redeclaration Yes
No
No
INTERNATIONAL DRAFTDRAFT
SDC2 Dispatch Instructions: Active power, reactive power and operating mode dispatch
Active Power Dispatch
Achieve dispatch level within allowable tolerance
consistent with Declarations
Inform HTSO without delay if problem arises
Reactive Power Dispatch Operating Mode Dispatch
Change operating mode consistent with Declarations
INTERNATIONAL DRAFTDRAFT
SDC2 Dispatch Instructions: Emergency
Emergency Instruction
Instruction may be outside Declared characteristics. Generator must comply
except for safety reasons
Inform HTSO without delay if problem arises
INTERNATIONAL DRAFTDRAFT
SDC3 Special Scheduling Provisions
SDC3 is to describe procedures to be adhered to by Users in defined special cases. – Congestion relief– Irrigation constraints– Minimum demand provisions– Renewable generation– Indigenous generation units– Hydro dispatch groups
Process for issuing instructions pursuant to SDC3 shall be in accordance with the provisions of SDC1 and SDC2.
Provisions of SDC3 do not supersede the provisions in SDC1 and SDC2.
INTERNATIONAL DRAFTDRAFT
SDC3 Irrigation Constraints
Unconditional must-run output for each dispatch hour
Availability for each dispatch hour
Generator givesnotice of constraintsby 10.00 day ahead
of dispatch day and specify::
IRRIGATIONCONSTRAINTS
Maximum and minimum available energy for dispatch day
Schedule and dispatch - SDC1 & SDC2
INTERNATIONAL DRAFTDRAFT
SDC3 Hydro Dispatch Groups
Unconditional must-run output for each dispatch hour
Availability for each dispatch hour
Generator givesnotice of constraintsby 10.00 day ahead
of dispatch day and specify::
HYDRO DISPATCH GROUPCONSTRAINTS
Maximum and minimum available energy for dispatch day
Schedule and dispatch - SDC1 & SDC2
Generator must meet certain constraints to qualify as Hydro Dispatch Group
INTERNATIONAL DRAFTDRAFT
THE END
Thank you from Meadhbh & John
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