SY/T 0033-2020 in English
VALIDSpecification for design of oil-gas field electrical power substation and distribution
- Issued on:2020-10-23
- Implemented on:2021-02-01
- File Format:PDF
- Delivery:Via email within 10 business days
$941.00
Introduction
Interpretation of the core content of the standard
| Technical module | 2009 version | Main revision points of the 2020 version |
|---|---|---|
| Load classification | Three-level classification system | Added the definition of particularly important loads, and refined the classification of natural gas liquefaction plants |
| Power supply system | Basic requirements for dual circuits | Clearly define the dual power supply configuration plan (Appendix A) and T-connection conditions for the public grid |
| Substation design | Conventional substation | New technical requirements for prefabricated substations (Article 6.1.3) |
Key technical requirements
1. Load classification management
The standard divides oil and gas field loads into three levels, among which emergency shut-off valves and automatic control systems are listed as particularly important loads, with the following requirements:
- Level 1 load: Dual power supply + emergency power supply must be used (Article 3.2.1)
- Level 2 load: T-connection to the public grid is allowed (Article 3.2.2)
- Natural gas liquefaction plant: Classification according to processing volume (Article 3.1.10)
2. Power supply and distribution system design
Typical case: A 500×10⁴m³/d natural gas purification plant uses a 35kV dual power supply line and is equipped with two on-load tap-changing transformers (Article 5.2.9). After reactive power compensation, the power factor reaches 0.95 (Article 5.4.2).
Allowable voltage deviation:
- Electric motor: ±5% (+5%~-10% in special cases)
- Lighting: ±5% in general places, +5%~-10% in remote areas
3. Substation configuration
It is recommended to use prefabricated substation (Article 6.1.3), requirements:
- The comprehensive automation rate of stations of 35kV and above is 100%
- Transformer load rate is 60%-85% (oil pump transformer ≥30%)
- Oil-free circuit breakers are used for high-voltage equipment (Article 6.5.3)
Implementation suggestions
Precautions in the design stage
| Phase | Work focus |
|---|---|
| Feasibility study | Load classification confirmation, power supply scheme comparison |
| Construction drawing design | Single-phase load conversion (Article 4.2.3), harmonic control |
New energy application
Solar power generation can be used in remote well sites (Article 3.2.2), and the supporting battery capacity is calculated based on 4h accident discharge (Article 6.6.1).
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