22878 version 1
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Operate and monitor a hydrogen cooled generator and systems in a
thermal power station
Level
4
Credits
6
Purpose
People credited with this standard are able to: demonstrate knowledge of
hydrogen cooled generator associated systems and controls; operate and
monitor hydrogen cooled generator and associated systems; and identify and
respond to deviations in the normal operation of a hydrogen cooled generator
and associated systems.
Subfield
Electricity Supply
Domain
Electricity Supply - Thermal Operations and Control
Status
Registered
Status date
20 June 2006
Date version published
20 June 2006
Planned review date
31 December 2011
Entry information
Prerequisites: Unit 17400, Operate cooling water
systems in a thermal electricity generation power station;
Unit 17403, Operate nitrogen and carbon dioxide
systems in a thermal electricity generation power station;
and Unit 22876, Operate and monitor a generator and
associated systems in a thermal power station; 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 within the unit standard can be applied according to industry
specific equipment, procedures, and processes.
 New Zealand Qualifications Authority 2016
22878 version 1
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2
Safety of personnel and plant must be a priority throughout the assessment. If the
safety requirements are not met the assessment must stop and the candidate will be
assessed as not yet competent.
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; 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,
Hamilton.
4
This unit standard excludes standby and emergency generators.
5
‘Industry requirements’ include all industry and workplace documented policies,
procedures, specifications, business, and quality management requirements relevant
to the workplace in which assessment is carried out.
6
The term ‘associated systems’ includes generator cooling systems and seal oil
systems. The term ‘generator’ refers to main system generators.
7
The term ‘operate’ is defined as manual operation and testing of thermal electricity
generation plant including plant adjustments, isolations, and restorations.
Elements and performance criteria
Element 1
Demonstrate knowledge of hydrogen cooled generator associated systems and controls.
Performance criteria
1.1
Generator gas cooling systems are described in accordance with industry
requirements.
Range
1.2
The location, operation, and components of generator gas cooling systems are
described in accordance with industry requirements.
Range
1.3
includes but is not limited to – design, theory, principles,
advantages, gas properties, purpose.
includes but is not limited to – gas properties, hydrogen storage,
hydrogen supply, gas cooling, generator purging, gas drier.
The location, operation, and components of generator water cooling systems
are described in accordance with industry requirements.
Range
includes but is not limited to – generator water cooling, water
quality, layout, principles, gas trapping, pumps.
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1.4
The location, operation, and components of seal oil systems are described in
accordance with industry requirements.
Range
1.5
Controls are described in accordance with industry requirements.
Range
1.6
includes but is not limited to – control and indication, differential
pressure control, temperature control.
Operating parameters are identified in accordance with industry requirements.
Range
1.7
includes but is not limited to – supply, pumps, DC supply, layout,
pressure control, seal construction, gas detraining.
includes but is not limited to – dew point, differential pressure,
purity, conductivity, flow, temperature, pressure.
Safety rules and regulations relevant for the operation of a hydrogen cooled
generator and associated systems are identified and explained in accordance
with industry requirements.
Element 2
Operate and monitor hydrogen cooled generator and associated systems.
Performance criteria
2.1
Operations are carried out in accordance with industry requirements.
Range
includes but is not limited to – isolations, restorations, plant
changeover, routine testing, leak detection, gassing, degassing,
pressure and temperature adjustments.
2.2
Operating and monitoring actions are logged in accordance with industry
requirements.
2.3
Operating decisions are determined in accordance with plant status and
industry requirements.
Range
2.4
may include but is not limited to – plant availability and service
condition, resource consent and loading limits, impact on
operations, market conditions.
Plant and equipment are monitored in accordance with industry requirements.
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22878 version 1
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Element 3
Identify and respond to deviations in the normal operation of a hydrogen cooled generator
and associated systems.
Performance criteria
3.1
Deviations from normal operating conditions are identified, logged, and acted
upon in accordance with industry requirements.
Range
3.2
may include but is not limited to – major leaks, loss of seal oil,
purity, loss of cooling medium, liquid in casing and dew point, gas
in coolant.
Plant safety, fire, and emergency procedures are followed in accordance with
industry requirements.
Range
includes but is not limited to – emergency degas; fire protection
systems; spill response, containment, clean up and disposal.
Please note
Providers must be accredited by the Qualifications Authority, 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 the Qualifications Authority 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.
Comments on this unit standard
Please contact the Electricity Supply Industry Training Organisation info@attto.org.nz if
you wish to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016