Application of Phase-Shifting Rectifier Transformers in the New Energy Sector
Time：2025-07-30 Auther：ZTelec-www.ztelectransformer.com
The phase-shifting rectifier transformer offers outstanding benefits such as high efficiency, energy savings, low loss, noise reduction, strong overload capacity, and excellent resistance to electrical shock and short circuits. These advantages have led to its widespread use across various industries, particularly in the rapidly growing new energy sector. This article explores the practical applications and technical strengths of phase-shifting rectifier transformers in photovoltaic, wind power, and energy storage systems.
Core Functions of Phase-Shifting Rectifier Transformers
1. Multi-Pulse Rectification Technology:
The phase-shifting rectifier transformer employs multiple secondary windings (e.g., 12 or 24), often configured in a delta connection to produce shifted voltage phases. This enables 24-pulse rectification, significantly reducing harmonic content in the input current and minimizing electromagnetic pollution on the power grid.
2. Electrical Isolation and Series Voltage Boost:
Each power unit is electrically isolated by the transformer to prevent interference. Additionally, by configuring voltages in series, the phase-shifting rectifier transformer increases overall DC output voltage, enabling compatibility with high-voltage DC transmission and high-power motor drive systems.
Typical Applications in the New Energy Sector
1. Photovoltaic Power Generation
Application Scenario:
In utility-scale solar power stations, phase-shifting rectifier transformers are used to convert AC output from inverters into high-voltage DC for long-distance transmission. Their ability to reduce harmonics and increase transmission efficiency makes them essential in PV systems.
Technical Advantages:
– Minimizes harmonic output from inverters, improving power grid compatibility;
– Supports high-voltage DC transmission, reducing losses by 30%–50% compared to AC transmission;
– Multi-winding structure supports distributed PV input and parallel operation, enhancing flexibility.
2. Wind Power Generation
Application Scenario:
In doubly-fed or direct-drive wind turbines, the phase-shifting rectifier transformer provides rectified power to the inverter, decoupling motor speed from grid frequency. For example, it converts variable-frequency AC into stable DC using 12-pulse rectification, which is then inverted to 50Hz AC for grid connection.
Technical Advantages:
– Improves system power factor, reducing reactive losses;
– Suppresses low-order harmonics (5th, 7th), meeting grid compliance standards;
– Supports low-voltage ride-through (LVRT), enhancing wind farm stability during faults.
3. Energy Storage Systems (ESS)
Application Scenario:
In modern battery energy storage systems, the phase-shifting rectifier transformer serves as a bidirectional converter interface. It transforms AC into DC during charging, and vice versa during discharging, ensuring smooth power exchange with the grid.
Technical Advantages:
– High power density improves overall energy conversion efficiency;
– Phase-shifted soft switching reduces switching loss by 5%–10%;
– Supports wide input voltage range, enhancing compatibility with various ESS configurations.
Thanks to its advanced design and technical superiority, the phase-shifting rectifier transformer plays a critical role in enabling high-efficiency, low-loss energy conversion and transmission in the new energy sector. Whether in solar PV plants, wind farms, or energy storage stations, it supports stable grid integration, reduces power quality issues, and contributes to sustainable energy infrastructure development. For future-ready energy systems, the phase-shifting rectifier transformer is an indispensable solution.
