Summary
Read more on ELECTRALV AC auxiliary system provides essential power supplies for the auxiliary equipment such as pulverised coal feeders, forced draft fans, lubricating oil pumps, seal oil pumps for hydrogen cooled generators, protective devices, etc. This technical brochure addresses key design elements, aspects affecting system reliability, and a brief introduction of new developments in the field of AC auxiliary power systems.
Table of content
1. Overview
1.1. LV AC auxiliary power systems
1.2. Characteristics of LV AC auxiliary power systems
2. Design of LV AC Auxiliary Power Systems in Power Plants
2.1. Introduction
2.2. Design of LV AC auxiliary power systems in thermal power plants
2.3. Design of LV AC auxiliary power systems in hydropower plants
3. Design of LV AC Auxiliary Power Systems in Substations and Converter Stations
3.1. Introduction
3.2. Design of LV AC auxiliary power systems in substations
3.3. Design of LV AC auxiliary power systems in converter stations
4. Main Equipment of LV AC Auxiliary System
4.1. LV station service transformers
4.2. Transfer switches
4.3. LV panelboards
4.4. LV AC circuit breakers
4.5. LV AC cables
4.6. Metering, monitoring and alarms
5. System Reliability Analysis
5.1. Maintenance – the influence of neutral connection on system reliability
5.2. Verification, testing, commissioning and maintenance
5.3. Influence of emergency power supply on system reliability
5.4. Influence of UPS on system reliability
5.5. Update of single auxiliary power supply of substations
5.6. Application of four pole circuit breakers
5.7. Effect of undervoltage trip unit on system reliability
5.8. Influences of voltage sag on reliability of thermal power plants
6. Analysis of Standardization of LV AC Auxiliary Power Systems
6.1. Standardization work status
6.2. Research on standardization system structure of LV AC auxiliary system
6.3. Demand analysis of standards for LV AC auxiliary system
7. Concluding Remarks
Appendix A Definitions, abbreviations and symbols
A.1. General terms
A.2. Specific terms
A.3. Abbrieviations
Appendix B Links and references
Appendix C LV loads commonly seen in thermal power plants
Appendix D Classification table of main auxiliary loads in substations
Appendix E Classification table of main station loads in converter stations
Appendix F Design of AC auxiliary power systems of hydropower stations
Appendix G Influences of voltage sag on reliability of LV AC auxiliary systems on the reliable operation of thermal power plants
G.1. Cause for voltage sags of LV AC auxiliary power system for power plant
G.2. Operating principle of frequency converter and the influence of voltage sag on it
G.3. Analysis of influence of voltage sag on auxiliary machine operation state
G.4. Treatment methods of LV ride through and their engineering application
Appendix H Tables of IEC relevant standards of AC auxiliary power systems
Additional informations
| Publication type | Technical Brochures |
|---|---|
| Reference | 834 |
| Publication year | |
| Publisher | CIGRE |
| ISBN | 978-2-85873-539-6 |
| Study committees | |
| Working groups | WG B3.42 |
| File size | 6 MB |
| Pages number | 142 |
| Price for non member | 260 € |
| Price for member | Free |
Authors
J. FAN, Convenor (CN), C.J. ROY, Secretary (IE)
M. RIDGLEY (AU), Y. CHEN (CN), A. RIDLEY (UK), A. BURGOS MELGUIZO (ES), K. CHEN (CN), C. OBERTHUER (DE), M. ZIELIŃSKI (PL), H. ABDULLA (SA), J. LI (CN), H.R. SHARIFNIA (US), Y. LUO (CN), J. PIŁAT (PL), J.J. PLACID (CA), M. ARRAMBIDE (BE)
Keywords
AC Auxiliary Power Systems, Substation Auxiliary Power Supply, Low Voltage Electrical Installation Design, Power Plant Auxiliary Systems, Station Service Transformer, Automatic Transfer Switching Equipment, ATSE, Uninterruptible Power Supply, UPS Configuration, TN Earthing System, Circuit Breaker Coordination Protection, Emergency Power Supply Reliability, Voltage Sag Ride-Through, Converter Station Auxiliary Power
