Grid Code - Operational Planning Code

Operational Planning Code

2nd Edition, 2008

Prishtina

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TABLE OF CONTENTS

1Introduction......

2Outage Planning Code......

2.1Introduction......

2.2Objective......

2.3Scope......

2.4Overview......

2.5Transmission System Maintenance Standards......

2.6Procedure for Outages Affecting the Transmission System......

2.6.1General Description......

2.6.2Timescales......

2.6.3Initial Proposals

2.6.4Preliminary Outage Schedule......

2.6.5Final Outage Schedule......

2.7Transmission and User System Outages......

2.7.1Planned Outages......

2.7.2Unplanned Outages......

2.7.3Changes Requested by TSMO......

2.7.4Changes Requested by Users......

2.7.5Emergency Situations......

2.7.6Notification of Forced and Fault User and TSMO Outages......

3System Assessment Code......

3.1Introduction

3.2Objective......

3.3Scope......

3.4TSMO Forecasts......

3.4.1General

3.4.2Demand Forecasts

3.4.3Transmission System Constraints

3.4.4Publication of Forecasts

3.5Information to be provided to the TSMO

3.5.1General......

3.5.2Monthly......

3.5.3Weekly......

3.5.4Every Day......

3.6Generation Forecasts......

3.6.1General

3.6.2Monthly

3.6.3Weekly

3.6.4Every Day

3.7Day-ahead Demand Forecast

3.7.2Contents of Day-ahead Demand Forecast

3.7.3Demand Forecast Updates

3.7.4System Operator Reporting

3.8Reserve Requirements......

3.9Interconnector Capacity......

3.10Ad-hoc

3.11Security Assessment......

3.11.1General

3.11.2Process

3.11.3Information Collection

3.11.4Information Analysis

3.11.5Confidentiality

3.11.6Publication

3.12Power System Security Assessments (PSSAs)

3.12.1Monthly PSSA

3.12.2Seasonal PSSA

3.12.3Weekly PSSA

3.12.4General

4Scheduling Code......

4.1Introduction......

4.2Objective......

4.3Scope......

4.4Submissions by Trading Parties......

4.4.1General......

4.4.2Physical Notifications (PN)......

4.4.3Dynamic Data Parameters......

4.4.4Checking and Approving Submissions

4.4.5Treatment of Invalid Submissions

4.4.6Bids and Offers......

4.4.7Suspension of Electricity Market......

4.4.8Ancillary Services......

4.4.9Communications......

4.4.10Schedule Format......

4.4.11Non-Working Days......

4.4.12Emergency Amendments of Approved Schedules......

5Appendix 1 – Dynamic Data Parameters......

5.1.1General

5.1.2Availability Data

5.1.3Ramp Rate Data

5.1.4Operational Limits

5.1.5Notice Requirements

5.1.6Other Generating Unit Information

5.1.7Demand-Side Scheduling and Dispatch Parameters (DSP)......

Grid Code – Operational Planning Code

1

Chapter 5: Operational Planning Code

1Introduction

1.1.1.1This operational planning code covers the period from one year ahead up to the real time balancing stage. It covers outage planning, system assessment and day ahead scheduling.

1.1.1.2This operational planning code is not a single entity but is made up of the following sub-codes (hereafter referred to as code):

• Outage planning code
• System assessment code
• Scheduling code

1.1.1.3To carry out its responsibilities under this operational planning code the TSMO requires information from users within Kosovo. These users are legally bound to provide this information fully in the required format and to meet the required timescales. The TSMO also requires information from interconnected parties. However these interconnected parties are not bound by the requirements of this grid code but by other bi-lateral or multi-lateral agreements. Therefore wherever this grid code refers to information from interconnected parties the supply of this information is subject to the above caveat.

2Outage Planning Code

2.1Introduction

2.1.1.1This code sets out the procedures for the following:-

• The co-ordination and approval of planned outages of generating units;
• The co-ordination of planned outages on the transmission system and of plant and apparatus directly connected to the transmission system;
• The necessary exchange of information between the TSMO and users for drawing up the outage schedules for the transmission system;
• Information exchange with other TSOswith regard to outages that affect interstate interconnections[1];
• The steps to be followed by the TSMO in dealing with unplanned outages:

2.2Objective

2.2.1.1The objective of this outage planning code is to seek to ensure that planned outages of all generating units, users directly connected to the transmission system and outages on the transmission system are approved and co-ordinated. Co-ordination is required to ensure that the security and quality of supply standards on the transmission system are met and as far as is possible the number and effect of constraints on the transmission system are kept to a minimum.

2.2.1.2This outage planning code should seek to ensure that the appropriate procedures are in place to allow coordination between the TSMO and neighbouring TSOs with regard to outages that affect interconnector power flows.

2.3Scope

2.3.1.1This outage planning code applies to the following:

• TSMO;
• Generators who own generating units connected to the transmission system;
• DSOs;
• other users directly connected to the transmission network:

2.4Overview

2.4.1.1The aim of this outageplanning code is to ensure that users provide the information that is needed for the following:

• The safe and secure operation of the transmission system;
• To allow the TSMO to complete calculations on the effect outages have to power flows in the interconnections:

2.4.1.2 The extent of this information is dependent upon the size, location and nature of the user's installation and whether or not the information provided at any stage confirms previously supplied data.

2.5Transmission System Maintenance Standards

2.5.1.1The TSMO shall maintain the transmission system according to the current standards for maintenance, inspections, repair and replacement of transmission facilities. These standards will provide for high quality, safe and reliable service and shall take into account cost, local geography and weather, the applicable standards for security and quality of supply, national electric industry practice, sound engineering judgement and experience.

2.5.1.2The maintenance and repair system shall provide for work to be carried out at certain periods and under a definite procedure. Both of these are aimed at keeping the transmission system equipment operating reliably and efficiently with the optimum labour and material input.

2.5.1.3The work to be carried out shall include:

• Equipment maintenance;
• Scheduled and preventive equipment repairs:

2.5.1.4A system of maintenance and scheduled preventive repairs of the transmission network equipment shall be arranged by the TSMO and users in accordance with the prevailing requirements and this grid code and taking into account specific local conditions.

2.5.1.5The responsibility for maintenance and repairs and the updating and refurbishing of transmissionsystem facilities shall be borne by the TSMO.

2.6Procedure for Outages Affecting the Transmission System

2.6.1General Description

2.6.1.1The TSMO shall be responsible for the co-ordination of the planned transmission outages with the planned outages of generating units and other users directly connected to the transmission system. It is essential that all individual annual outage schedules are co-ordinated in order to ensure the security and stability of operation of the entire power system. In order to achieve this overall aim the TSMO shall do the following:

• Review and co-ordinate the tentative dates for planned outages for transmission, generation, distribution and other users;
• Communicate with submitting parties to assist in attempting to minimise anticipated constrained operations;
• Recommend adjustments to the planned outages throughout the year in order to improve the co-ordination in the planned outage schedule:
• Timescales

2.6.2.1The annual outage programme consists of the individual annual outage schedules of the respective user’s plant and apparatus. It also contains transmission system and distribution systemoutages. The dates by which the various actions must be carried out are summarised in the following table:

2.6.2.2The planned annual outage schedule will be prepared using a two-stage process following the submission of information to the TSMO. Firstthe TSMO will consider the proposed transmission system outages and outages of interconnectors and distribution equipment that could impact on the transmission system. The information to permit this exercise to be carried out must be available by July.

2.6.2.3The TSMO in preparing this first draft schedule will act in a non-discriminatory way giving priority to users on a rolling basis. The TSMO will discuss any contentions with the parties involved. The second stage will be undertaken after all the information on outages of generating units becomes available in [beginning of September]. If there are any conflicts the TSMO will discuss them with the parties involved. If no solution can be achieved by agreement then the TSMO will take the final decision and issue outage plan proposal [end of September], which shall be communicated to the regulator.

2.6.2.4The final stage in the process is to harmonise the outage plan proposal with regard to the outage schedules for the interconnectors with the neighbouring states. After this has been agreed by [middle of October] the TSMO will apply any necessary corrections and issue the final approved outage plan by the [middle of November].

2.6.2.5 In preparing this schedule, the TSMO will seek, as far as is reasonably possible, to satisfy the requirements of all parties plus the requirements of the transmission network development plan (TNDP). However the TSMO has an absolute responsibility for the maintenance of the security and quality of supply standards and this will be the first priority in establishing the outage positioning within the schedule. Where the TSMO determines, in its reasonable judgement, that proposed outages would lead to the standards of security and/or quality of supply being infringed, the TSMO will make the necessary changes to outage proposals to rectify the situation. In making this judgement the TSMO will consider all factors and will act in a non-discriminatory way.

2.6.2.6 Second to the security and quality criteria, the TSMO shall seek to minimise transmission constraint costs incurred in outage situations. However generators or other users shall not be obliged to agree to changes to their outage proposals solely for this reason. They will, however, in the interests of the overall economic management of the Kosovan Power System be required to consider proposals made by the TSMO for this reason.

At all stages of the process the TSMO shall act as a reasonable and prudent operator.

2.6.3Initial Proposals

When submitting proposals for outages the user should base their request on the following information:

• The repair and maintenance requirements of the transmission network plant and apparatus;
• The repair and maintenance requirements of the user plant and apparatus and equipment used for the connection to the transmission network;
• Analysis of the actual technical conditions of plant and apparatus and associated equipment and defect checking from previous repairs:

2.6.3.1The request will as a minimum contain the following information:

• Name of the transmission plant and apparatus concerned;
• Name of the generating unit and/or the power plant equipment concerned;
• Name of the distribution plant and apparatus concerned;
• Name of the directly connected power consumer plant and apparatus concerned;
• MW or capacity concerned;
• Required duration of the outage;
• Minimum return to service time (this can be different at different stages of the outage);
• Preferred start date and start time or range of start dates and start times:
• Preliminary Outage Schedule

2.6.4.1 The TSMO will prepare the initial annual outage schedule by [end of July] to include only transmission systemoutages. Once preliminary agreement has been reached the TSMO will further refine it after incorporating outages of generating units and interconnectors for the next calendar year to produce the preliminary outage schedule. The TSMO will issue to all the transmission systemusers the relevant part of the preliminary annual outage schedule not later than [middle of October] of the current calendar year. The preliminary annual outage schedule is based on the following:

• Annual outage schedules of the users and the TSMO;
• Annual outage schedule for interconnectors upon agreement with neighbouring TSOs;
• Annual demand forecast as per this grid code;
• Maintaining the security and quality standards for the Kosovan Power System;
• Minimising constraints;
• Final Outage Schedule

2.6.5.1The TSMO will issue to all transmission networkusers and the regulator the relevant part of the final annual outage schedule for the next calendar year not later than [middle of November] of the current calendar year. As of this date the outage dates as specified in the final annual outage plan are binding on all users and may only be changed in the following exceptional circumstances:

• In case of dangerous operational conditions or the security and stability of a power plant;
• Where there would otherwise be insufficient generating capacity to meet forecast demand and maintain the security and quality standards for the Kosovan Power System;
• In case of serious constraints in the regional interconnected transmission grid;
• In the event of mutual agreement between the TSMO and the other party;
• Force majeure:

2.7Transmission and User System Outages

2.7.1Planned Outages

2.7.1.1In order to maintain the continuity and viability of the annual planned outage schedule, all users shall submit to the TSMO, no later than the [15th] of the month an application in respect of any outage planned to start at any time during the following month.

2.7.1.2The application will contain the following information:

• Details of the works and/or tests to be carried out;
• Any necessary pre-work;
• Confirmation that all contracts etc are in place;
• Project plan for the work and any risks;
• Emergency restoration time and relevant restoration plan, if applicable[2];
• Confirmation that all quality control and safety procedures have been or will be carried out:
• List and contacts of responsible personnel:

2.7.1.3 Subsequently all users will confirm outage requirements at least [seven] days in advance of the planned outage start date.

2.7.2Unplanned Outages

2.7.2.1In the event of an unplanned outage the TSMO will use the following priority ranking:

(i)Forced and fault (emergency) outages, these include overruns of planned outages where it is not possible to restore the plant to service;

(ii)Overruns of planned outages where it is possible but economically unacceptable to restore the plant to service;

(iii)Under an emergency or an unplanned situation the above types of outages take priority over planned outages;

(iv)Outages not included in the planned annual outage schedule but fulfilling the notice periods in paragraph 2.7.1;

(v)Outages not included in the planned annual outage schedule and not fulfilling the notice periods in paragraph 2.7.1 - these outages will only be granted in exceptional circumstances:

2.7.2.2 In certain circumstances the TSMO may agree outages with users that could give rise to overloads, as a consequence of a fault on the system. Accordingly to enable the TSMO to manage the system it will be necessary for the user to agree post fault actions to secure the system. In the absence of such provisions the TSMO may not allow the outage to take place.

2.7.2.3The TSMO must take all reasonable steps to allow planned outages to take place, bearing in mind possibly significant costs to the parties of the cancellation of an outage. In making decisions to cancel or postpone an outage, and where there are options, the TSMO will discuss priorities with the users concerned and any other relevant parties and will come to the best solution in the circumstances. In all cases the final decision rests with the TSMO.

2.7.3Changes Requested by TSMO

2.7.3.1When actual or anticipated system conditions change such that the TSMO considers that the rescheduling of a planned outage for economic reasons is advisable, the TSMO shall inform the other party of the situation. They shall consider the impact of proceeding with the outage and may either proceed or postpone the outage.

2.7.4Changes Requested by Users

2.7.4.1Following the issue of the final annual outage schedule users may request changes. These will be considered by the TSMO (where time permits) but will not be permitted if agreement would lead to security and/or quality of supply standards being infringed or additional constraint costs being incurred.

2.7.4.2In considering such requests, the TSMO will attempt to make outages possible by system re-configuration or by the re-negotiation of other outages with the parties involved. Consistent with the foregoing, the TSMO shall permit or deny transmission outages based on the following:

• The TSMO shall co-ordinate and make every effort to approve all outage requests consistent with secure, reliable and economic system operation, and shall co-ordinate the actions necessary to maintain the security and quality of supply standards;
• The TSMO may deny any unplanned outage or outage change even if it does not impact on security and quality of supply standards and/or constraint costs but if its anticipated duration is greater than [one] working day;
• The TSMO may deny any unplanned outage or outage change if the TSMO determines, at its sole discretion, that agreement to the outage would lead to constraint costs:

2.7.4.3It must be fully understood that the development of an integrated outage schedule over a period of several months is a complex iterative process and that subsequent changes will generally be difficult to achieve, especially taking into account the need to co-ordinate outages of interconnectors on a regional level as per UCTE OH P4. This will be particularly true in the peak outage period. All parties should, whenever possible, avoid requests to change outage schedules following the issue of the final planned annual outage schedule.

2.7.5Emergency Situations

2.7.5.1The electricity system is always subject to fault and ‘force majeure’ outages of transmission and distribution equipment and generating units. In these cases it may be necessary for the TSMO to cancel or postpone planned outages at short notice, where security and/or quality of supply standards might otherwise be compromised.

2.7.5.2 In the following emergency situations the TSMO may take the following action:

• Postpone or cancel any transmission outage when, in the judgement of the TSMO, the operation of the Kosovan Power System, to the required security and/or quality of supply standards may be jeopardised. The TSMO must immediately notify all the parties involved in the outage and must use reasonable endeavours to re-schedule the outage at the earliest possible time suitable to all the parties;
• Order the cessation of work and the return to service of an item, or items, of plant where the TSMO judges that the continuation of the outage, or outages, may lead to the infringement of the security and/or quality of supply standards. Where time permits, the TSMO will discuss the implications of any such decisions, and possible alternatives, with the parties involved:

2.7.5.3 Upon the request of the party and/or the regulator, the TSMO shall submit a written report justifying the reasons for cancellation or postponement of a planned outage.