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Manage electricity generation dispatch
Level
6
Credits
10
Purpose
People credited with this unit standard are able to: demonstrate knowledge of
principles of power system operation; identify generation and transmission
status; implement generation dispatch; provide feedback to system operator
on constraints; manage abnormal generation dispatch events; and report on
generation dispatch management.
Subfield
Electricity Supply
Domain
Electricity Supply - Power System Management
Status
Registered
Status date
11 December 2009
Date version published
11 December 2009
Planned review date
31 December 2014
Entry information
Recommended: Unit 15574, Demonstrate knowledge of
the New Zealand electricity market operation and
regulation, or demonstrate equivalent knowledge and
skills.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Electricity Supply Industry Training Organisation
Accreditation and Moderation Action Plan (AMAP) reference
0120
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
1
This unit standard is intended for, but not restricted to, workplace assessment. The
range statements across the unit standard can be applied according to industry
specific equipment, procedures, and processes.
2
Safety of personnel and plant must be a priority throughout the assessment. If the
safety requirements are not met the assessment must stop.
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3
Performance and work practices in relation to the elements and performance criteria
must comply with all current legislation, especially the Electricity Act 1992, and any
regulations and codes of practice recognised under that statute; the Health and
Safety in Employment Act 1992; Electricity Governance Regulations and Rules
(EGRs); and the Resource Management Act 1991. Electricity supply industry codes
of practice and documented industry procedures include the Safety Manual –
Electricity Industry (SM-EI) (2004) Wellington: Electricity Engineers’ Association. A
full list of current legislation and industry codes is available from the Electricity Supply
Industry Training Organisation, PO Box 1245, Waikato Mail Centre, Hamilton 3240.
4
The phrase in accordance with industry requirements is implicit in all elements and
performance criteria in this unit standard.
5
Industry requirements include all asset owner requirements; manufacturers’
specifications; and enterprise requirements which cover the documented workplace
policies, procedures, specifications, and business and quality management
requirements relevant to the workplace in which assessment is carried out.
Elements and performance criteria
Element 1
Demonstrate knowledge of principles of power system operation.
Range
may include but is not limited to – power balances and frequency maintenance,
transmission theory, voltages, generating plant, generation security, losses,
load sharing, load control systems, reactive power generation and
compensation, network circuit and plant protection, communications and
System Control and Data Acquisition (SCADA) systems, computerised
monitoring and control systems, system reliability and security, planning.
Performance criteria
1.1
Theory of electrical power and energy is described in terms of active and
reactive power.
1.2
The principles of electrical power systems are described.
1.3
Theory of generation control and dispatch is described.
Range
1.4
may include but is not limited to – fuel values, offers, Electricity
Governance Regulations and Rules (EGRs), ramp rates, start
times, schedule compiling.
Responsibilities of generation dispatcher are defined.
Range
may include but is not limited to – reliability and security of system
and supply, response to emergency events, transmission circuit
and plant loading limits, sudden transmission constraints,
islanding, maintenance of contracted voltage values at network
nodes, developing and issuing dispatch instructions, monitoring
performance.
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Element 2
Identify generation and transmission status.
Range
may include but is not limited to – transmission circuit and plant loading, on-line
generating plant and other generating plant availability, indications and alarms,
system and network node voltages.
Performance criteria
2.1
Generation and transmission status is determined.
2.2
Planned events that impact on status are identified and their impact determined
and recorded.
2.3
Controller handover procedures are completed ensuring that all relevant
information is transferred to the new controller.
Element 3
Implement generation dispatch.
Range
may include but is not limited to – generation dispatched as per dispatch
schedule, active and reactive power balances maintained, frequency, time error,
maintenance of contracted network node voltage values.
Performance criteria
3.1
Dispatch decisions are determined in accordance with schedule requirements,
plant status, and local knowledge ensuring that load and system security
requirements are met.
Range
3.2
may include but is not limited to – offered and accepted plant,
plant availability, load following station or group, spinning reserve,
options, alternatives, frequency keeper selection, dispatch
management tool.
Dispatch is carried out using the latest dispatch schedule.
Range
may include but is not limited to – dispatch instruction viewer,
scheduling pricing of dispatch software, communication of
dispatch instructions.
3.3
Generation controllers are kept up-to-date with dispatch requirements in a
manner and timeframe which reflects the urgency of the requirements.
3.4
The plant is operated within legislative and resource consent parameter
requirements to meet system demand and reserve requirements.
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3.5
When system requirements are not met by generation schedule, optimisation
tools are used to allocate active power demand to available generating plant.
Range
3.6
Grid security is determined.
Range
3.7
may include but is not limited to – available plant, offered plant and
acceptance, power balances, reserves, transmission constraints,
resource consents.
may include but is not limited to – frequency disturbance, reserve
assessment tool.
Developed generation dispatch plans are clear and concise.
Element 4
Provide feedback to system operator on constraints.
Range
may include but is not limited to – generation unavailability, transmission
constraints, bona fide, re-offers.
Performance criteria
4.1
Unplanned constraints and events are notified to the system operator.
4.2
Incorrectly scheduled generation activities are notified to the system operator.
Element 5
Manage abnormal generation dispatch events.
Range
emergency, unscheduled, abnormal condition, alarms.
Performance criteria
5.1
System is stabilised.
Range
5.2
The event, and cause of event, is identified using all available resources.
Range
5.3
may include but is not limited to – system frequency and or voltage
excursions, system stable when dynamic parameters are back
within the limits defined as normal.
may include but is not limited to – plant and equipment status
indications, protection operation, SCADA, reports, local
knowledge, defect notification, logging, reports.
The event is acknowledged.
Range
may include but is not limited to – alarms and protection flaggings
acknowledged, logging, reports, time sequence, SCADA.
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5.4
Impact of event on the transmission network, its circuits and plant, public safety,
customer service, and the environment is determined and responded to.
Range
5.5
The event is analysed to identify options to remedy or mitigate undesired
conditions and identify future actions using established analysis tools and
products.
Range
5.6
may include but is not limited to – integrity of system, security of
supply, local control, remaining transmission circuit and plant
loading limits, local control over SCADA, hazardous condition,
contamination, Civil Defence.
may include but is not limited to – restoration planning,
contingency analysis tools, notification of defect to initiate repair,
SCADA, Energy Management System tools.
The event reporting is conducted.
Range
may include but is not limited to – electronic mail, oral
communication, logging, debriefing, publishing market information,
reporting, manual event logging tool.
Element 6
Report on generation dispatch management.
Range
may include but is not limited to – logging, reports.
Performance criteria
6.1
Recorded information is accurate, complete, concise, and legible.
6.2
Generation dispatch information is recorded in the required format and filed.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
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Comments on this unit standard
Please contact the Electricity Supply Industry Training Organisation info@esito.org.nz if
you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016