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Why are some toroidal transformers designed as on-load voltage regulators?

On-Load Tap Changer (OLTC) is a specially designed toroidal transformer. Its main function is to regulate and control the voltage during the operation of the transformer. OLTC can adjust the output voltage by changing the steering ratio of the transformer according to actual needs to adapt to changes in the power grid or load.

Here are a few reasons why some toroidal transformers need to be designed as on-load regulators:

1. Load changes: Grid loads change with time and demand. By using an on-load voltage regulator, the transformer can adjust the output voltage according to the load conditions to meet the load requirements. This prevents voltage fluctuations from affecting the normal operation of load equipment.

2. Grid regulation: Grid voltage sometimes fluctuates or becomes unstable. Through the on-load voltage regulator, the transformer can adjust in real time when the voltage fluctuates, maintaining a stable output voltage and ensuring the normal operation of the load equipment.

3. Grid Connectivity: In some cases, the transformer may need to be connected to a different grid, which may have different voltage requirements. The on-load voltage regulator can switch between power grids and make corresponding voltage adjustments as needed to ensure the connectivity and matching of the transformer with different power grids.

4. Coordinate voltage: In some complex power systems, multiple transformers may be required to work together to meet load demands. By using an on-load voltage regulator, voltage coordination between multiple transformers can be achieved to ensure that the voltage output by each transformer is uniform and stable.