A GUIDE TO DATA REQUIREMENTS FOR AUSTRALIAN WIND ENERGY FORECASTING SYSTEM (AWEFS)

Transcription

1 A GUIDE TO DATA REQUIREMENTS FOR AUSTRALIAN WIND ENERGY FORECASTING PREPARED BY: Operational Forecasting VERSION: 0.4 DATE: 11 February 2016 FINAL Australian Energy Market Operator Ltd ABN NEW SOUTH WALES QUEENSLAND SOUTH AUSTRALIA VICTORIA AUSTRALIAN CAPITAL TERRITORY TASMANIA

2 Contents Overview... 1 Data supply requirements for wind farms Step 1: Wind farm and Cluster standing data Step 2: Wind farm SCADA to AEMO Step 3: Wind farm plant availability to AEMO... 3 Appendix A - Rules relating to AWEFS modelling requirements... 1

3 Version Release History VERSION DATE BY CHANGES /05/2014 Abraham Yohannan First Draft /05/2014 Abraham Yohannan Tjaart Vanderwalt /05/2014 Abraham Yohannan Tjaart Vanderwalt Catherine Sage Changes made following review. Final review changes /02/2016 Jack Fox Fix broken links and clarify availability submission.

4 Glossary a) In this document, a word or phrase in this style has the same meaning as given to that term in the National Electricity Rules. b) In this document, capitalised words or phrases or acronyms have the meaning set out opposite those words, phrases, or acronyms in the table below. c) Unless the context otherwise requires, this document will be interpreted in accordance with Schedule 2 of the National Electricity Law. Table 1 Glossary Term 5MPD AWEFS ECM EMMS ESOO MTPASA MW NEM NEMDE NER PASA POE SCADA SDC STPASA UIGF Meaning 5 minute Pre-dispatch Australian Wind Energy Forecasting System Energy conversion model Electricity Market Management Systems Electricity Statement of Opportunities Medium-term Projected Assessment of System Adequacy Megawatts National Electricity Market NEM Dispatch Engine National Electricity Rules Projected Assessment of System Adequacy Probability of Exceedance Supervisory Control and Data Acquisition Semi-dispatch Cap Short term Projected Assessment of System Adequacy Unconstrained Intermittent Generation Forecast

5 Overview This document details the wind farm data that AEMO requires to prepare the Australian Wind Energy Forecasting System (AWEFS) for new or existing wind farms. It supplements AEMO s Energy Conversion Model Guidelines. Under National Electricity Rules (NER) Rule Clause 3.7B(a) 1, AEMO is required to prepare forecasts of the available capacity of semi-scheduled generators to schedule sufficient generation in the Dispatch process. AEMO is also required to prepare Unconstrained Intermittent Generation Forecasts (UIGF) 2 to be used in PASA processes for reserve assessment purposes. To meet these requirements, the AWEFS was designed to produce wind generation forecasts for all semischeduled and non-scheduled wind farms for all market system processes (Dispatch, 5MPD, Predispatch, Short term PASA and Medium Term PASA). Data supply requirements for wind farms 2.1 Step 1: Wind farm and Cluster standing data As per Rule Clause (c) (2), all wind generators connecting to the National Electricity Market (NEM) are required to submit 3 to AEMO, an Energy conversion model consisting of the wind farm details, historical meteorological measurements and attributes of individual clusters 4. The static data and historical measurements provided as part of the Energy conversion model assist AEMO in choosing and developing forecasting models for wind farms. Energy conversion model validation is a mandatory step for all new wind farms before Registration in the NEM is approved. The following guidelines may assist in ensuring a satisfactory and timely validation of the Energy conversion model: (1) All data items identified as mandatory need to be completed/provided. Incomplete data would result in delays with validation. (2) The Cluster definition guidelines 5 need to be considered while grouping clusters. (3) The Energy conversion model should contain a separate Cluster Standing Data section for each cluster. Energy conversion model validation is a time-consuming process taking four to six weeks. To avoid further delays, AEMO recommends that the first draft of the Energy conversion model be submitted to AEMO at least three months before applying for Registration. 2.2 Step 2: Wind farm SCADA to AEMO Table 3 below lists all remote monitoring (SCADA) parameters required for modelling wind farms in AWEFS. 1 Refer Appendix A - Rules relating to AWEFS modelling requirements 2 Unconstrained Intermittent Generation Forecasts (UIGF) is the forecast generation output of wind farms without considering network limitations, economical decisions or the dispatch optimisation process. 3 Energy Conversion Models can be submitted for validation via ECMValidations@aemo.com.au 4 A cluster corresponds to a group of wind turbines of similar type (same manufacturer model) and within a reasonable geographic area. 5 Cluster Definition Guidelines are provided in the Energy Conversion Model Doc Ref: v February 2016 Page 1

6 SCADA item Table 2 Remote monitoring (SCADA) parameters for modelling wind farms in AWEFS Measured from Refresh Rate Wind farm SCADA Timeline of Procurement Mandatory? Active Power (MW) Connection Point 24 hours prior to first turbine energisation Wind farm control system setpoint (MW Setpoint) Wind farm control system 24 hours prior to first turbine energisation 6 Number of turbines ON (actively generating) Wind farm control system 24 hours prior to first turbine energisation Number of turbines available for generation Wind farm control system 24 hours prior to first turbine energisation Meteorological SCADA Wind-speed (m/sec) Anemometer in Turbine Nacelle (AND) Meteorological mast or 1 minute average After first turbine is energised (Nacelle measurement) & After met mast is commissioned (for met mast measurement) Wind direction (Degrees) Anemometer in Turbine Nacelle (AND) Meteorological mast or 1 minute average After first turbine is energised (Nacelle measurement) & After met mast is commissioned (for met mast measurement) Ambient Temperature Anemometer in Turbine Nacelle (AND) Meteorological mast After first turbine is energised (Nacelle measurement) & After met mast is commissioned (for met mast measurement) The remote monitoring data is used to generateg forecasts in the Dispatch and 5 minute Pre-dispatch (5MPD) timeframes. Wind farms need to consider the following points when designing SCADA parameters: (1) Wind farm control system set-point (MW Setpoint): I. Under normal conditions, when a wind farm is not constrained off or down-regulated, the MW setpoint SCADA should reflect a value above the wind farm's registered maximum capacity, but below 250% of it. 6 Following consultation in Market/Open/Amendment-to-the-Energy-Conversion-Model-Guidelines Doc Ref: v February 2016 Page 2

7 II. During periods of down-regulation or when a wind farm is constrained off, the MW set-point SCADA should reflect the setpoint applied in the wind farm's control system to limit (down regulate) its output to at or below the level required by AEMO or the NSP. The set-point could either be AEMO s or the Wind farm s setpoint value. (2) Number of turbines ON (actively generating): This should indicate the number of wind turbines that are actively generating at the wind farm at any given time. (3) Number of turbines available for generation: This should indicate the number of turbines that are available to generate at the wind farm. This includes: I. turbines that are actively generating. II. III. turbines available to generate, but not operating due to ambient conditions (high/low wind speed, high temperature). turbines available to generate, but paused due to down-regulation (constrained off). However, it should not include turbines under maintenance, repair, damage or being manufactured. The number of turbines available for generation SCADA should always indicate a value that is equal to or greater than the number of turbines ON (actively generating). The following guidelines may assist in ensuring compliance with AEMO s remote monitoring requirements: (1) Meteorological SCADA (listed in Table 2) needs to be provided from the turbine nacelle (measured from the nacelle of a turbine that reasonably represents the location of the wind farm) and meteorological masts. (2) All SCADA parameters need to be tested (in co-ordination with AEMO/TNSP/DNSP) prior to commissioning, to ensure communication with AEMO s Energy Management System is functional. (3) All SCADA parameters should be functional based on the Timeline of Procurement listed in Table 2. AEMO may not provide approval to commence commissioning tests without sufficient SCADA visibility. (4) Compliance with the Power System Data Communications Standard is required at all times. (5) The MW setpoint SCADA should be designed to update automatically rather than manually. 2.3 Step 3: Wind farm plant availability to AEMO Rule Clause 3.7B (b) requires wind farms to advise AEMO of their plant availability information. This information is used to generate the forecasts for Pre-dispatch, Short term PASA and Medium term PASA processes. The plant availability information is submitted via AEMO s Electricity Market Management Systems Web Portal. The following table summarises the data that needs to be submitted via the web portal. Data Items Number of turbines unavailable in each Cluster Table 3 Wind farm plant availability data Description This information is used by AWEFS to determine the generation capability of the wind farm. Upper MW Limit Any MW restriction (or limit) that would prevent the wind farm from generating to its capability. The restriction could either be an internal wind farm limitation or a limitation applied on the wind farm (by AEMO or the NSP) due to network limitations. The Turbines Unavailable and Upper MW Limit entered via AEMO s EMMS Web Portal do not apply to the Dispatch and 5 minute Pre-dispatch timeframes; to manage local limits in the Dispatch and 5 Doc Ref: v February 2016 Page 3

8 minute Pre-dispatch timeframes refer to the Guide to Intermittent Generation document on the AEMO website. A Guide to submitting the above information via the Web Portal is available at: Guide to Intermittent Generation. Doc Ref: v February 2016 Page 4

9 Appendix A - Rules relating to AWEFS modelling requirements This section details the various rule requirements to be met by wind farm proponents, to enable AEMO to model the wind farm in AWEFS. Rule Clause Table 1 Rules relating to modelling wind farms in AWEFS Requirement 3.7B (a) AEMO must prepare a forecast of the available capacity of each semischeduled generating unit (to be known as an unconstrained intermittent generation forecast) in accordance with this rule 3.7B for the purposes of: (1) the projected assessment of system adequacy process; (2) dispatch; and (3) pre-dispatch (c) AEMO must approve a request for classification as a semi-scheduled generating unit if it is satisfied that the output of the generating unit is intermittent and that the person: (2) has submitted an energy conversion model which contains the information described in the guidelines referred to in paragraph (d); (3) has adequate communications and telemetry to support the issuing of dispatch instructions and the audit of responses. S The remote monitoring quantities referred to under paragraph (a) that AEMO may request include: (b)(2)(iv) active power and reactive power for the generating system; (b)(5) in respect of a wind farm type of generating system: (i) wind speed; (ii) wind direction; (iii) ambient temperature; and (b)(6) any other quantity that AEMO reasonably requires to discharge its market and power system security functions as set out in Chapters 3 and 4. (b)(8) if a wind farm type of generating system: (i) number of units operating; (ii) wind speed; and (iii) wind direction, 3.7B (b) A Semi-Scheduled Generator must: (1) submit to AEMO, in accordance with the timetable, the plant availability for each semi-scheduled generating unit for the purpose of paragraph (a) as soon as the Semi-Scheduled Generator becomes aware that the plant availability of the unit is at least 6MW below or above the nameplate rating of the unit; and (2) where the Semi-Scheduled Generator has submitted plant availability in accordance with subparagraph (1), notify AEMO in accordance with the timetable as soon as the Semi-Scheduled Generator becomes aware of any changes to the plant availability of that semi-scheduled generating unit until such time as the plant availability of that semi-scheduled generating unit is no longer at least 6MW below or above the nameplate rating of the unit. Doc Ref: v February 2016 Page 1