Photovoltaic transformers are the core step-up equipment in distributed and centralized photovoltaic power plants. Their operating conditions differ from conventional distribution transformers, possessing unique technical characteristics:
1. Adaptability to intermittent power generation: Photovoltaic output fluctuates with sunlight, operating at full capacity during the day and under no-load conditions at night. Frequent start-ups and shutdowns and large load fluctuations necessitate transformers with extremely low no-load losses and strong adaptability to various operating conditions.
2. Strong harmonic suppression capability: Photovoltaic inverters generate harmonics. Photovoltaic transformers require optimized electromagnetic design to possess excellent harmonic suppression capabilities, avoiding… 3. Precise voltage boosting and stable grid connection: Standard 0.4kV low-voltage boosting to 10kV grid connection requires high voltage accuracy to ensure grid connection safety;
4. Strong outdoor weather resistance: Mountain, rooftop, and agricultural-photovoltaic complementary power stations are mostly installed outdoors. Equipment must be moisture-proof, corrosion-proof, sun-proof, and anti-aging. A fully sealed structure eliminates leakage and moisture-related failures;
5. Low-loss requirement: Transformers operate under no-load for extended periods at night when there is no sunlight. Ultra-low no-load loss significantly reduces power station operation and maintenance energy consumption, improving the overall profitability of photovoltaic projects.
