Monitor electricity supply power network system

Transcription

1 Page 1 of 5 Monitor electricity supply power network system Level 4 Credits 10 Purpose People credited with this unit standard are able to: continuously monitor power supply trends, communication, and security systems; respond to alarms; and determine changes in the status, condition, and performance of power system components. Subfield Domain Status Electricity Supply Electricity Supply - Power System Management Registered Status date 16 April 2010 Date version published 16 April 2010 Planned review date 31 December 2014 Entry information Accreditation Standard setting body (SSB) Prerequisites: Unit 16276, Respond to electricity supply external system operations communications; and Unit 16275, Implement electricity supply power network asset owner s load management policy; or demonstrate equivalent knowledge and skills. Evaluation of documentation and visit by NZQA and industry. Electricity Supply Industry Training Organisation Accreditation and Moderation Action Plan (AMAP) reference 0120 This AMAP can be accessed at Special notes 1 This unit standard can be assessed against in a workplace environment, or in a training or educational environment if simulated equipment response and examples are able to be provided, or in a combination of both environments.

2 Page 2 of 5 2 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 Electricity supply industry codes of practice and documented industry procedures include 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 The phrase in accordance with industry requirements is implicit in all elements and performance criteria in this unit standard. 4 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. 5 Reference to terms, procedures, and specifications in this unit standard may be taken as including industry documented procedures and specifications relevant to the workplace in which assessment is carried out. 6 The following terms and abbreviations relate to this unit standard: Asset owner refers to the owner of an electricity supply network that takes its point of supply from Transpower NZ and delivers electricity to industrial, commercial, and residential customers. Integrity is the ability of an asset owner to maintain or integrate the unity of the sum total of components in an electrical power system to deliver electricity to its customers. Status refers to the operational condition or state of any or all of the components of an electrical power system relative to its expected or required performance level. Data refers to information in a written or numerical form. The latter may include summary statistics, information in tables, and numbers displayed in a variety of graphs. The terms power network and power system have the same meaning. CCTV closed circuit television. SCADA Supervisory Control and Data Acquisition system used for control, indication, and monitoring purposes. Elements and performance criteria Element 1 Continuously monitor power supply trends, communication, and security systems. 1.1 Trends in electricity power supply are monitored and documented. may include but is not limited to documentation such as load graphs, data logging, SCADA archive system.

3 1.2 Status of substation security system is monitored and documented version 4 Page 3 of 5 may include but is not limited to door security, bunding, CCTV systems, entry access. 1.3 Status of communication system is monitored and documented. may include but is not limited to radio, phone. 1.4 Integrity of power system is monitored for effectiveness of delivery of power to customers. may include but is not limited to SCADA indications, metering summation, total load. 1.5 Abnormalities in power supply, communication, and security systems are noted and immediately reported to supervising officer. may include but is not limited to over or under voltage, overcurrent, loss of signal. 1.6 Data is collated and analysed to establish causes of variations in performance levels of power supply, communication, and security systems. may include but is not limited to analysis of voltage levels, determine priority, asset owner procedures. Element 2 Respond to alarms. 2.1 Network alarms are immediately acknowledged with investigative or corrective action being initiated. may include but is not limited to documenting time, location, alarm type, indication signals, possible cause, related operations documented, circuit breaker tripping, review of electronic logging. 2.2 Circuit breaker trippings and relay flag operations, or other indicating devices, are assessed for priority for restoration and investigation action. may include but is not limited to checking for circuits with overcurrent flags, earth fault flags, other fault or protection indications, distance protection operations, differential protection.

4 Page 4 of Relay codes, protection codes, and abbreviations are used and comply with operating standards and terminology used by asset owner. may include but is not limited to industry list of approved abbreviations. 2.4 Contractor is engaged to carry out remedial work in accordance with, and within an agreed timeframe as required by, the asset owner. may include but is not limited to job specification, approval procedures, time for entry to equipment. 2.5 Alarms are reset. Element 3 Determine changes in the status, condition, and performance of power system components. 3.1 Condition of power system components is inspected and reported on at agreed intervals. may include but is not limited to condition of lines, cables, switchgear, SCADA. 3.2 Changes and/or modifications that affect the operation of power system components are documented. may include but is not limited to abnormal circuits, re-close blocks, circuit interruptions, relay indications. 3.3 Status, condition, and performance of power system components are updated in report to supervising officer at agreed intervals. may include but is not limited to timely reporting, situation update, media release information. 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.

5 Page 5 of 5 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@esito.org.nz if you wish to suggest changes to the content of this unit standard.