1 Scope
This specification specifies the requirements for power supply design of petrochemical enterprises (including oil refining, chemical and coal chemical enterprises).
This specification is applicable to the power supply design of newly constructed, renovated or expanded petrochemical enterprises (including oil refining, chemical and coal chemical enterprises).
2 Normative references
The following documents are indispensable for the application of this specification. For dated references, only the edition cited applies. For undated reference, the latest edition (including any amendments) applies.
GB 50052 Code for design electric power supply systems
GB 50060 Code for design of high voltage electrical installation (3~110kV)
GB/T 12325 Power quality - Deviation of supply voltage
GB/T 14549 Quality of electric energy supply - Harmonics in public supply network
GB/T 12326 Power quality - Voltage fluctuation and flicker
GB/T 15543 Power quality - Three-phase voltage unbalance
GB/T 50062 Code for design of relaying protection and automatic device of electric power installation
GB 50160 Fire prevention code of petrochemical enterprise design
GB 50049 Code for design of small fossil fired power plant
GB/T 13730 Dispatching automation systems for district power networks
DL 5003 Specifications for the design of dispatch automation in electric power systems
DL/T 620 Overvoltage protection and insulation coordination for AC electrical installations
SH 3038 Code for electric power design in petrochemical plants
3 Classification of electrical load in enterprises and its requirements for power supply system
3.1 Classification of electrical load in enterprises
3.1.1 The electrical load in an enterprise shall be classified according to the electrical load of each production device within the enterprise.
3.1.2 The production links between enterprises shall be considered for the classification of electrical load in joint petrochemical enterprises.
3.1.3 The electrical load in petrochemical enterprises is classified as follows:
a) Primary electrical load in enterprises refers to the electrical load of the important or main production devices and utilities that ensure their normal operation;
b) The electrical load in joint and large petrochemical enterprises shall be classified as primary electrical load in enterprises;
c) Secondary electrical load in enterprises refers to most of electrical load of main production devices and corresponding utilities in enterprises.
3.1.4 For the classification of electrical load in enterprises, the particularly important load in the primary electrical load of the production device may not be considered.
3.1.5 For determining the level of the electrical load in enterprises, the total electrical load shall be calculated, and the primary and secondary electrical loads of production devices shall be counted respectively.
3.1.6 See Annex A for the example of electrical load level of each production device in enterprises.
3.2 Requirements of each level of electrical load in enterprises for power supply system
3.2.1 The enterprise shall determine the power supply mode according to the regional power supply conditions, which shall comply with GB 50052. When the regional power supply conditions are sufficient, the power supply mode based on external power supply shall be adopted; when the regional power supply conditions are poor, the comprehensive power supply mode of external power supply and self-generation may be adopted; for joint enterprises, the power supply mode based on self-generation should be adopted.
3.2.2 The primary electrical load in enterprises shall be powered by dual power supplies, which shall meet one of the following conditions:
a) The dual power supplies come from the same-level voltage busbars of different substations respectively;
b) The dual power supplies come from same-level voltage busbars of the same substation, whose circuits may not be connected or are not closely connected during operation;
c) The dual power supplies come from same-level voltage busbars connected in a circuit in the same substation. When one power supply fails, the other shall work and maintain the voltage level for normal operation, so as to meet the requirements of restarting the motor group of the production device.
Foreword i
1 Scope
2 Normative references
3 Classification of electrical load in enterprises and its requirements for power supply system
3.1 Classification of electrical load in enterprises
3.2 Requirements of each level of electrical load in enterprises for power supply system
4 Power supply system of enterprise
4.1 Voltage of power supply system
4.2 Voltage regulation of power supply system
4.3 Power supply system composition
4.4 Main electrical connection of power supply system
4.5 Earthing methods of power supply system
4.6 Power factor and improvement measures
5 Main substation (distribution station)
5.1 Station site selection and overall arrangement
5.2 Selection and model selection of main electrical equipment
5.3 Arrangement of distribution equipment
5.4 Relay protection and automatic device
5.5 Self power supply and operational power supply
5.6 Overvoltage protection of electrical equipment
5.7 Buildings, structures and auxiliary facilities
5.8 Main substation (distribution station) fire prevention design
6 Power dispatching automation system and substation automation system
6.1 General requirements
6.2 Software requirements
6.3 Hardware requirements
6.4 Setting principles of power dispatching automation system
6.5 Design principles of substation automation system
6.6 Substation automation system structure and communication network
6.7 System clock
6.8 Power supply setting
7 Power supply and distribution lines and factory lighting
7.1 Power supply and distribution lines
7.2 Factory communications and signal lines
7.3 Factory lightning
8 Private station
8.1 Setting principles of private station
8.2 Model selection of generator sets
8.3 Voltage selection of generator set of private station
8.4 Main electrical connection of private station
8.5 Private station connection to power supply system
Annex A (Informative) Example of electrical load class in production device
Explanation of wording in this specification
