prefabricated compact substation with up to 420KV
Descriptions
prefabricated compact substation with up to 420KV is a highly integrated substation solution that integrates transformers, switchgear, protection equipment, and control devices into a single unit, typically housed in a box. It has the characteristics of small size, easy installation, and simple maintenance. This substation is widely used in urban power supply transformation, construction site power supply, mine sites, and other special occasions, as well as in various occasions of new energy power generation fields.
The design of prefabricated compact substation with up to 420KV emphasizes space utilization and functionality, and they usually have good ventilation design to effectively control the temperature rise of transformers. At the same time, they have rich solutions and are easy to meet customers' different customized needs. For example, ABB's compact outdoor operating box-type substation is designed to meet GB and IEC standards, and has passed the IAC-AB internal arc fault test to ensure the safety of people and equipment.
In addition, the automation system integration of compact substations can be divided into interval level and substation level, by optimizing the function distribution, achieving function layered processing, and improving the reliability and economy of substations. GB/T 40823-2021 national standard specifies the conditions of use, rated values, design and structure, testing and selection guidelines for compact integrated substation equipment (CEADS), and is applicable to 36 kV-40.5 kV AC rated voltage high-voltage side distribution substations. In terms of specific products, for example, YBM(P)29-12/0.4 high-voltage/low-voltage prefabricated substation, it is a compact integrated power distribution device that is suitable for various locations and has the characteristics of strong integration, small size, and compact structure. Compared with traditional on-site substations, it can significantly reduce design workload and construction volume, and reduce construction costs.
With the advantages of space saving, quick installation, and easy maintenance, prefabricated compact substation with up to 420KV is playing an important role in modern power systems, and their application scope and market share will continue to expand as technology advances.
Working condition
►Altitude: ≤1000m.
►Ambient temperature: -30 °~ +40°C;
►Outdoor wind speed: no more than 35m/s;
►Relative humidity: Daily average 95%, monthly average 90%,
►Seismic restraint capacity:
►horizontal earthquake acceleration: below 0.4m/s2
►vertical earthquake acceleration below 0.15m/s2
►Installation location: there should be no violent impact, severe pollution, chemical corrosion, conductive dust, flammable and explosive ►hazardous articles which are harmful to metal and insulator
►Please consult us when the normal conditions for use can't be met.
Product structure Characteristics
Compact prefabricated substations, commonly referred to as box-type substations, are a highly integrated form of electrical power equipment. They possess the following main features and structural characteristics:
1. **High degree of integration**: Prefabricated compact substations integrate high-voltage switchgear, distribution transformers, and low-voltage distribution devices within one or several enclosures. This results in a compact layout with a small footprint, typically occupying only 1/10 to 1/5 of the area required by conventional substations.
2. **Compact structure**: Substations are typically divided into three functional compartments: high-voltage chamber, transformer chamber, and low-voltage chamber-each equipped with comprehensive functionalities. The high-voltage side can be configured for various supply modes such as ring-main unit (RMU) supply, terminal supply, or dual-source supply.
3. **High level of automation**: These substations employ intelligent design and are equipped with microcomputer-based comprehensive automation systems that enable remote telemetry, telecontrol, teleprotection functions.
4. **Factory prefabrication**: Major equipment components are installed and tested within assembly plants before being deployed on-site directly-a practice that reduces construction periods and minimizes on-site workload.
5. **Safety and reliability**: The enclosure materials used in these substations exhibit corrosion resistance while ensuring that internal operations remain unaffected by external environmental factors-thus enabling adaptability to diverse environmental conditions.
6. **Flexible combination methods**: Each enclosure constitutes an independent system which allows for flexible combinations based on specific requirements.
7. **Economic viability**: In comparison to conventional stations of similar scale, compact prefabricated substations offer significant cost reductions along with reduced land occupation.
8. **Strong adaptability**: Different structural forms and materials can be selected according to varying usage environments and conditions in order to meet distinct operational requirements.
9 .**Diverse technical parameters**: A range of rated voltages,capacities,and currents is provided,to cater for different application scenarios.
10.**Environmental integration:** The exterior design seamlessly blends into its surrounding environment, such as landscape painting style or ancient architectural style
Main Technical Parameters
|
Name |
Items |
Unit |
Parameter |
||
|
High Voltage Unit |
Rated frequency |
HZ |
50 |
||
|
Rated voltage |
KV |
6 |
10 |
35 |
|
|
Maximum operating voltage |
KV |
6.9 |
11.5 |
40.5 |
|
|
Rated current |
A |
440, 630, 1250 |
|||
|
Transfer current |
A |
1200-3150. |
|||
|
Power frequency withstand voltage to ground and interphase/isolation fracture |
KV |
42/48 |
|||
|
Lightning impulse withstand voltage to ground and interphase/isolation fracture |
KV |
75/85 |
|||
|
Rated short circuit breaking current (current limiting fuse) |
KA |
31.5 |
|||
|
Transformer Unit |
Rated voltage |
KV |
6, 10, 35 |
||
|
Rated capacity |
KVA |
30-2000 |
|||
|
Tap range |
% |
±2x2.5%, ±5% |
|||
|
Connection Symbol |
Yyn0, Dyn11 |
||||
|
Impedance voltage |
% |
4, 4.5, 6, 8 |
|||
|
Low Voltage Unit |
Rated voltage |
V |
220, 380, 690, 800 |
||
|
Main loop rated current |
A |
50-4000. |
|||
|
Branch current |
A |
5-800. |
|||
|
Outer Shell |
IP Grade (regular products) |
High pressure chamber IP33, Transformer room IP23, Low voltage room IP33 |
|||
|
Noise level |
dB |
≤50 |
|||
A variety of appearances are available
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