DL/T 5153-2002 in English

1.0.1 This Rule is suitable for the newly-built or expanded condensing power station with 125MW steam turbine generators capacity or above, it is also suitable for the design of the thermal plants with 50MW and above heat supply type units. The design of power plant reconstruction project with installing forementioned units and design of power plant adopting cleaning electric power generation can refer to use.

1.0.2 Foreign projects will take the country of supply party or buyer into consideration. This Rule is referred to in combination with the physical circumstance of the project.

1 Scope
2. Normative Refernces
3 General principles
4 Auxiliary Power Connection
4.1 Auxiliary power voltage
4.2 The earthing mode for auxiliary power system neutral point
4.3 The mode of connection for auxiliary power bus bar
4.4 Auxiliary power operation power supply
4.5 Auxiliary power standby, start/standby power supply
4.6 AC security power supply and uninterrupted power supply (UPS)
4.7 The auxiliary power supply load connection and power supply mode
4.8 Low voltage repair supply network
5. The auxiliary transformer and reactor selection and voltage verification at the time of motor starting
5.1 Load calculation
5.2 Capacity selection
5.3 Voltage regulation
5.4 The voltage verification at the time of motor normal starting
5.5 The auxiliary power bus bar voltage verification at the time of grouping motor self-starting
5.6 Impedance selection
6 Auxiliary Power Motor
6.1 Type selection
6.2 The voltage selection and capacity verification
7. Short-circuit Current Calculation and Selection of Electric Appliance and Conductor
7.1 The high-voltage auxiliary power system short-circuit current calculation
7.2 High-voltage auxiliary power equipment type selection
7.3 Low-voltage auxiliary power system short-circuit current calculation
7.4 Low-voltage apparatus selection
7.5 Low-voltage apparatus combination
8 Auxiliary Electric Equipment Collocation
8.1 Auxiliary switchgear collocation
8.2 The auxiliary transformer and miscellaneous auxiliary electric equipment collocation
8.3 Requirements for buildings
8.4 Requirements for ventilation
9 Auxiliary Power Relaying Protection Device
9.1 General requirements for auxiliary power relay protection
9.2 Single-phase earthing protection for neutral point non- direct earthing auxiliary power system
9.3 Auxiliary power working and standby reactor return circuit protection
9.4 High-voltage auxiliary transformer protection
9.5 Low-voltage auxiliary transformer protection
9.6 High-voltage auxiliary power motor protection
9.7 Low-voltage auxiliary motor protection
9.8 Auxiliary circuit protection
9.9 Diesel generator protection
10 Auxiliary Power Control, Signal, Measure and Automatic Device
10.1 Auxiliary power control and signal
10.2 Auxiliary electric equipment measuring instrument
10.3 Auxiliary power automatic device
10.4 Diesel generator control, signal, measure and automatic device
Annex A (Informative) Estimation Method for Fossil Fuel Power Plants Auxiliary Power Consumption Rate (Approximate Calculation)
Annex B (Informative) SN Common Auxiliary Power Load Characteristics
Annex C (Informative) The High-voltage Auxiliary Power System Neutral Point Earthing Equipment Selection
Annex D (Informative) Diesel Generator Units Selection
Annex E (Informative) Pulverized Coal Delivery Distribution Box Power Automatic Switching Connection (See Figure E1)
Annex F (Informative) Repair Distribution Box Installing Place and Quantity
Annex G (Informative) Auxiliary Power Load Calculation
Annex H (Normative) Auxiliary Power Voltage Regulation Calculation
Annex J (Normative) The Voltage Calculation at the Time of Motor Normal Starting
Annex K (Normative) The Auxiliary Power Bus-bar Voltage Verification at the Time of Grouping Motor Self-starting
Annex L (Informative) Starting Temperature Rise Calculation of Motor
Annex M (Informative) Calculation of Short-circuit Current in High-voltage Auxiliary Power System
Annex N (Informative) Practical Method for Calculation of Short-circuit Current of 380V Power Center
Annex P (Normative) Calculation Curve of Short-circuit Current in 380V System
Annex Q (Normative) Selection of Fuse Cutout and Breaker
Annex R (Informative) Combination Table of 380V Low-voltage Equipment
Annex S (Informative) Calculation of Continuous Working Current in 380V Power Supply Circuit
Annex T (Normative) Measuring Instrument of Auxiliary Electric Equipment
Annex U (Normative) Wording Explanation