22878 Operate and Monitor a Hydrogen Cooled Generator and Systems in a Thermal Power Station

22878 version 1 Page 1 of 4

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.

Ó New Zealand Qualifications Authority 2018 22878 version 1 Page 2 of 4

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 includes but is not limited to – design, theory, principles, advantages, gas properties, purpose.

1.2 The location, operation, and components of generator gas cooling systems are described in accordance with industry requirements.

Range includes but is not limited to – gas properties, hydrogen storage, hydrogen supply, gas cooling, generator purging, gas drier.

1.3 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.

1.4 The location, operation, and components of seal oil systems are described in accordance with industry requirements.

Range includes but is not limited to – supply, pumps, DC supply, layout, pressure control, seal construction, gas detraining.

1.5 Controls are described in accordance with industry requirements.

Range includes but is not limited to – control and indication, differential pressure control, temperature control.

1.6 Operating parameters are identified in accordance with industry requirements.

Range includes but is not limited to – dew point, differential pressure, purity, conductivity, flow, temperature, pressure.

1.7 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.

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 may include but is not limited to – plant availability and service condition, resource consent and loading limits, impact on operations, market conditions.

2.4 Plant and equipment are monitored in accordance with industry requirements.

Element 3

Identify and respond to deviations in the normal operation of a hydrogen cooled generator and associated systems.

3.1 Deviations from normal operating conditions are identified, logged, and acted upon in accordance with industry requirements.

Range 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.

3.2 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 [email protected] if you wish to suggest changes to the content of this unit standard.

Ó New Zealand Qualifications Authority 2018