Selection Of Voltage Regulator Capacity

The capacity selection of Dynamic Voltage Regulator (DVR) should be based on the power demand of the equipment, the voltage fluctuation range of the power grid, the type and quantity of equipment, and a certain safety factor. ‌
*First, the capacity of the voltage stabilizer should be able to meet the total power demand of the power equipment load. And fully consider the power factor. For example, if the load power factor is 0.8 (i.e. cosφ=0.8, the voltage stabilizer capacity should be multiplied by 1.25). ‌In addition, it is recommended to choose a slightly larger capacity to leave a certain margin, at least 20% margin is preferred, to ensure the stability of the voltage stabilizer under high load, and to cope with the additional power equipment load that may be added in the future. ‌
*Secondly, consider the peak power demand of the equipment. Most power equipment will far exceed the rated power, i.e. peak power, when starting. Ensuring that the voltage stabilizer is sufficient to cope with the instantaneous current when the power equipment starts, so that the line voltage drop is a very important consideration. ‌
*The voltage fluctuation range of the power grid is also an important factor. ‌The voltage fluctuation range of power grids in different regions may be different, so when choosing the size of the voltage stabilizer, you should understand the local voltage fluctuation. ‌If the voltage fluctuation of the power grid is large, then choosing a voltage stabilizer with a larger capacity can better resist the voltage fluctuation of the power grid and maintain a more stable power supply (such as if the voltage is often 20% lower than the rated voltage, the capacity should be increased by 20% accordingly). ‌
*The type and quantity of equipment will also affect the choice of voltage stabilizer. ‌Different types of equipment have different requirements for voltage stability. ‌Some equipment is more sensitive to voltage fluctuations and requires a more stable power supply. ‌And some ordinary equipment has a strong adaptability to voltage fluctuations. ‌Therefore, it is necessary to determine the required capacity according to the type and quantity of equipment.
*Finally, consider the reliability and life of the voltage stabilizer. ‌Choose a three-phase separately regulated voltage stabilizer with high reliability, high efficiency and long life. When the voltage of any phase of phase A, B or C changes, it can be adjusted back immediately, which can greatly reduce the failure rate of the equipment. This type of voltage stabilizer can be applied to all types of loads such as resistive, inductive, and capacitive, without waveform distortion, and reduces the cost of use. In addition, when choosing, it is recommended to choose a professional company that produces voltage-stabilized power supplies and a company with a long history.