Power Generaion

Transformers play a vital role in the power generation industry, and their solutions need to cover multiple links such as power generation, transmission and distribution, grid connection and intelligent management. The following are specific application scenarios and technical solutions for the power generation industry:

Ⅰ.Core solutions for power generation

1. Step-up transformer

- Function: Boost the medium voltage output by the generator to high voltage to reduce long-distance transmission losses.

- Technical features: High short-circuit capacity, low no-load loss, optimized design using amorphous alloy core or silicon steel sheet, adaptable to frequent start and stop.

- Case: A large thermal power plant is equipped with a 500kV main transformer at the outlet, and offshore wind power is connected to the grid by boosting 66kV to 220kV.

2. Auxiliary system transformers

- Plant power transformer: Provides low-voltage power to the internal equipment of the power plant and must have anti-harmonic capabilities.

- Island operation support: Diesel generator matching transformer to ensure power supply to key loads in the plant when the power grid fails.

Ⅱ.Key technologies for renewable energy grid connection

1. Fluctuating power source adaptation

- Dual-winding/three-winding transformer: compatible with multiple inverter outputs of wind farms or photovoltaic power stations to balance power fluctuations.

- Dynamic voltage regulation capability: integrated on-load voltage regulator or static reactive power compensation to cope with voltage flicker.

2. Offshore wind power special solution

- Compact design: Use gas-insulated transformers to reduce platform space occupation and withstand salt spray corrosion.

- DC collection system: With converter transformers, high-voltage DC transmission is realized in offshore wind farms.

Ⅲ.Intelligent and digital innovation

1. Condition monitoring and predictive maintenance

- Sensor integration: real-time monitoring of oil temperature, partial discharge, vibration and other parameters, and analysis of degradation trends through the platform.

- Digital twin model: combining historical data with AI algorithms to predict transformer life and optimize maintenance cycles.

2. Adaptive grid interaction

- Intelligent on-load voltage regulation: the system automatically adjusts the tap to support grid frequency regulation and black start.

- Virtual synchronous machine technology: enables the transformer-inverter system to simulate the inertia of the synchronous generator and enhance the stability of the weak grid.

IV. Solutions for special scenarios

1. Safety requirements of nuclear power plants

- Redundant design: 1+1 backup transformers are configured to meet nuclear safety certification and withstand earthquakes and interference.

- Low noise design: noise-reducing housing is used to reduce the impact on the nuclear island control room.

2. Energy storage system integration

- Bidirectional energy flow management: Equipped with a dedicated energy storage transformer to support rapid switching of battery charging and discharging modes.

- Cascade utilization adaptation: Compatible with the non-balanced charging and discharging characteristics of retired power batteries, and designed with a wide voltage range winding.

V. Green transformation and emerging technologies

1. Application of environmentally friendly materials

- Natural ester insulating oil: high ignition point, biodegradable, replaces mineral oil for use in ecologically sensitive areas such as hydropower stations.

- SF6-free design: uses dry air or fluoroketone as insulating medium to reduce greenhouse gas emissions.

2. Superconducting transformer

- High-temperature superconducting coil: achieves more than 98% efficiency, increases capacity by 3-5 times, and is suitable for future high-density renewable energy grid connection.

VI. Global Grid Interconnection Trends

1. Cross-border/inter-regional power transmission

-UHV DC converter: supports voltage levels of ±800kV and above, enabling thousands of kilometers of power transmission (such as the China-Laos interconnection project).

-Frequency conversion transformer: connects heterogeneous power grids such as Japan's East-West power grid interconnection.

Summary

The innovation direction of transformers in the power generation industry focuses on high efficiency, intelligence, reliability and environmental protection. It needs to be customized according to the specific power generation types such as thermal power, wind power, photovoltaic power, etc., and integrate digital technology to meet the challenges of energy transformation. Future trends include deep integration with emerging systems such as energy storage and hydrogen energy, as well as the development of ultra-high voltage equipment for the global energy Internet.