Transformer substations (TBA) have several key technical parameters that affect performance and operational efficiency. Here are the main ones:
1. Rated Capacity
- Measured in kVA or MVA, indicating the power transmission capability of the substation.
- Common capacities: 100 kVA, 250 kVA, 500 kVA, 1000 kVA, 2500 kVA, 5000 kVA.
2. Rated Voltage
- Input and output voltage levels of the substation, including:
- Low-voltage transformer substation: 22/0.4 kV
- Medium-voltage transformer substation: 35/22 kV
- High-voltage transformer substation: 110/35 kV, 220/110 kV
3. Rated Current
- Calculated based on power and voltage, influencing the system's load capacity.
4. Winding Connection Configuration
- Specifies the connection method of transformer windings, with common types including Dyn11, Yyn0, Yd11.
5. Efficiency and Losses
- Efficiency typically ranges from 95% - 99%, depending on the manufacturing technology.
- No-load losses and short-circuit losses impact the system's energy consumption.
6. Power Factor (cosφ)
- Indicates the effective utilization of electrical power, usually ranging from 0.8 - 0.95.
7. Short-Circuit Withstand Capability
- Measured in kA, showing the ability to endure high currents during faults.
Some of the world's most renowned transformer substation manufacturers include:
DaQo Group is a company specializing in electrical equipment manufacturing, including transformer substations (TBA) and energy solutions. The company operates multiple production facilities in China, focusing on products such as transformers, switchgear, and high-voltage power systems.
- Additionally, DaQo New Energy, a subsidiary of the group, invests heavily in the production of silicon materials for the renewable energy sector. One of its major projects is a polysilicon manufacturing plant in Xinjiang, China, with a total investment of $2 billion.
- Siemens (Germany) – Offers advanced substation solutions with cutting-edge technology.
- ABB (Switzerland) – Specializes in power systems and automation, known for digital substations.
- General Electric (GE) (USA) – Produces high-performance substations serving various industries.
- Schneider Electric (France) – Provides smart substation solutions that optimize energy efficiency.
- Mitsubishi Electric (Japan) – Focuses on high-capacity substations for national grid applications.
- Hitachi Energy (Japan) – Develops integrated substation solutions for renewable energy integration.