国家能源局公告

前　　言

1　总　　则

2　术　　语

3　厂用电接线

• 3.1　厂用电负荷分类

• 3.2　厂用电电压等级

• 3.3　厂用电的电能质量

• 3.4　厂用电系统中性点的接地方式

• 3.5　厂用母线的接线方式

• 3.6　厂用工作电源

• 3.7　厂用备用、启动/备用电源

• 3.8　交流保安电源

• 3.9　交流不间断电源

• 3.10　厂用电负荷的连接和供电方式

• 3.11　低压检修供电网络

4　厂用变压器和电抗器的选择及电动机起动时的电压校验

• 4.1　负荷统计

• 4.2　容量选择

• 4.3　电压调整及调压方式

• 4.4　阻抗选择

• 4.5　电动机正常起动时的电压校验

• 4.6　成组电动机自起动时厂用母线电压的校验

• 4.7　谐波抑制

5　厂用电动机

• 5.1　型式选择

• 5.2　电压选择及容量校验

6　短路电流计算及电器和导体的选择

• 6.1　高压厂用电系统短路电流计算

• 6.2　高压厂用设备的选型

• 6.3　低压厂用电系统短路电流计算

• 6.4　低压电器的选择

• 6.5　低压电器的组合

7　厂用电气设备的布置

• 7.1　厂用变压器

• 7.2　厂用配电装置

• 7.3　对建（构）筑物和通风的要求

8　厂用电继电保护装置

• 8.1　一般规定

• 8.2　厂用电系统的单相接地保护

• 8.3　厂用工作及备用电抗器回路的保护

• 8.4　高压厂用变压器的保护

• 8.5　低压厂用变压器的保护

• 8.6　高压厂用电动机的保护

• 8.7　低压厂用电动机的保护

• 8.8　厂用线路的保护

• 8.9　柴油发电机的保护

9　厂用电控制、信号、测量及自动装置

• 9.1　厂用电的控制和信号

• 9.2　厂用电气设备的测量仪表

• 9.3　厂用电的自动装置

• 9.4　柴油发电机的控制、信号、测量及自动装置

附录A　火力发电厂设计厂用电率估算方法

附录B　火力发电厂常用厂用负荷特性参考表

附录C　高压厂用电系统中性点接地设备的选择

附录D　柴油发电机组的选择

附录E　检修配电箱装设地点及数量

附录F　厂用电的负荷计算

附录G　厂用电电压调整计算

附录H　电动机正常起动时的电压计算

附录J　成组电动机自起动时厂用母线电压的计算

附录K　电动机起动温升计算

附录L　高压厂用电系统短路电流实用计算法

附录M　380V动力中心短路电流实用计算法

附录N　380V系统短路电流计算曲线

• N.1　附　　图

• N.2　附图使用注意事项

附录P　熔断器及断路器的选择

附录Q　380V低压设备组合表

附录R　380V供电回路持续工作电流计算

附录S　厂用电气设备的测量仪表

本标准用词说明

引用标准名录

1　General provisons

2　Terms

3　Auxiliary power system wiring

• 3.1　Load classification

• 3.2　Auxiliary power system voltage class

• 3.3　Electrical energy quality

• 3.4　Grounding modes of neutral point of auxiliary power system

• 3.5　Wiring modes of auxiliary power buses

• 3.6　Auxiliary operating power supply

• 3.7　Auxiliary standby and startup/standby power supply

• 3.8　AC emergency power supply

• 3.9　Uninterruptible power supply

• 3.10　Wiring and supply modes of auxiliary loads

• 3.11　LV maintenance power supply network

4　Selection of auxiliary transformer/reactor，check of motor voltage during startup　　　　　

• 4.1　Load capacity calculation

• 4.2　Transformer/reactor sizing

• 4.3　Voltage regulation and regulating modes

• 4.4　Short-circuit impedance selection

• 4.5　Check of voltage of auxiliary buses and motors during normal starting

• 4.6　Check of voltage of auxiliary buses during grouped motors self-starting

• 4.7　Harmonic restraining

5　Motor

• 5.1　Type selection

• 5.2　Rating of voltage and check of capacity

6　Short-circuit current calculation and electrical equipment and conductor selection

• 6.1　Short-circuit current calculation in MV auxiliary power system

• 6.2　MV electrical equipment selection

• 6.3　Short-circuit current calculation in LV auxiliary power system

• 6.4　LV electrical equipment selection

• 6.5　LV electrical equipment coordination

7　Arrangement of auxiliary electrical equipment

• 7.1　Auxiliary transformer

• 7.2　Auxiliary switchgear

• 7.3　Requirement on buildings and ventilation

8　Relay protection devices of auxiliary power system

• 8.1　General requirements

• 8.2　Single-phase earthing fault protection in auxiliary power system

• 8.3　Operating and backup reactor protection

• 8.4　MV auxiliary transformer protection

• 8.5　LV auxiliary transformer protection

• 8.6　MV auxiliary motor protection

• 8.7　LV auxiliary motor protection

• 8.8　Auxiliary feeder-line protection

• 8.9　Desiel generator protection

9　Control，signaling，instrumentation and automatic devices of auxiliary power system

• 9.1　Control and signaling of auxiliary power system

• 9.2　Instrumentation of auxiliary electrical equipment

• 9.3　Automatic devices of auxiliary power system

• 9.4　Control，signaling，instrumentation and automatic devices of desiel generator

Appendix A　Design auxiliary power rate estimation

Appendix B　Load characteristic for reference

Appendix C　Selection of neutral point grounding device in MV auxiliary power system

Appendix D　Selection of desiel generator set

Appendix E　Location and quantity of maintenance power distribution cabinets

Appendix F　Load capacity calculation

Appendix G　Voltage-regulation calculation

Appendix H　Voltage calculation during normal starting of motor

Appendix J　Voltage calculation during self-starting of grouped motors

Appendix K　Temperature-rise calculation of motor during starting

Appendix L　Practical calculation of short-circuit current in MV auxiliary power system

Appendix M　Practical calculation of short-circuit current in 380V power centers

Appendix N　Calculation curve of short-circuit current in 380V power system

Appendix P　LV fuse and circuit-breaker selection

Appendix Q　380V LV electrical equipment coordination form

Appendix R　Calculation of continuous operating current in 380V circuit

Appendix S　Instruments of auxiliary electrical equipment

Explanation of wording in this code

List of quoted standards