NZQA registered unit standard
24692 version 2
Page 1 of 4
Title
Demonstrate knowledge of water turbine governors for hydro-electric
power plant
Level
4
Credits
10
Purpose
People credited with this unit standard are able to: describe the
purpose and operation of a water turbine governor for hydroelectric power plant, and describe different types of water
turbine governors for hydro-electric power plant. They are also
able to identify and describe the components, and describe the
function, of a pressure oil supply system for a water turbine
governor for hydro-electric power plant.
Classification
Electricity Supply > Electricity Supply - Power System
Management
Available grade
Achieved
Explanatory 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 enterprise
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.
3
Performance and work practices in relation to the outcomes and evidence
requirements 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 current version of the Safety Manual – Electricity Industry
(SM-EI) (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 outcomes and
evidence requirements 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, business, and quality management requirements
relevant to the workplace in which assessment is carried out.
Electricity Supply Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
24692 version 2
Page 2 of 4
6
Assessment against this unit standard includes the whole water turbine
governor/hydro-electric turbine governor system, from the speed sensing device out
to, and including the main servo motor/s.
7
The following rules are referred to in this unit standard:
Electricity Industry Participation Code (Wellington: Electricity Authority, 2010)
available at: http://www.ea.govt.nz/act-code-regs/code-regs/the-code/.
Outcomes and evidence requirements
Outcome 1
Describe the purpose of a water turbine governor for hydro-electric power plant.
Range
output power, permanent speed droop, stability, frequency, load change.
Evidence requirements
1.1
The purpose is described with reference to automatic control systems.
Range
1.2
Reference is made to accuracy and reliability of supply.
Range
1.3
start up, synchronising, power regulation, shut down, supplying
isolated network.
Electricity Industry Participation Code: part 8 – Common quality.
The relationship between turbine and load characteristics is described.
Outcome 2
Describe different types of water turbine governors for hydro-electric power plant.
Range
may include – mechanical, electronic, analog or digital governors;
evidence of two different types of water turbine governors is required.
Evidence requirements
2.1
Water turbine governor components are described.
2.2
Labelled block diagrams are produced describing all components.
Electricity Supply Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
24692 version 2
Page 3 of 4
Outcome 3
Describe the operation of a water turbine governor for hydro-electric power plant.
Evidence requirements
3.1
The function of components is described.
Range
3.2
pilot valve, main distributing valve, dither, speed sensing,
servomotors, return motion/feedback, gate limiter, protection shut
down device, penstock pressure rise limiting devices, control
power amplification.
Governor operation in response to changes in load and required power output is
explained with the aid of diagrams.
Range
permanent speed droop, temporary speed droop and dashpot
time, Proportional Integral Derivative regulation, protection
shutdown.
Outcome 4
Identify and describe the components, and describe the function, of a pressure oil supply
system for a water turbine governor for hydro-electric power plant.
Range
accumulator tank and oil and air level regulation, pressure relief valve, sump
tank, oil pump/s, unloader valve/s, non-return valve/s, oil level indication, oil
pressure indication, oil filtration, oil coolers.
Evidence requirements
4.1
Components of a pressure oil supply system are identified and described by
means of diagrams.
4.2
The function of the pressure oil supply system is described by means of
diagrams.
Planned review date
31 December 2013
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
19 May 2008
N/A
Revision
2
15 September 2011
N/A
Consent and Moderation Requirements (CMR) reference
0120
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Electricity Supply Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
24692 version 2
Page 4 of 4
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR 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@esito.org.nz if
you wish to suggest changes to the content of this unit standard.
Electricity Supply Industry Training Organisation
SSB Code 101813
 New Zealand Qualifications Authority 2016