A guide to the basics of Single-Phase Step-Voltage Regulators
Background
In remote rural areas, the distribution lines are generally too long. Whenever the electricity consumption peaks, the voltage cannot meet the electricity demand. Therefore, in order to solve this problem, our company has developed a Single-Phase Step-Voltage Regulators, which can not only change the voltage level, but also change the power distribution of the system. Make the output voltage of the substation meet the predetermined requirements.
The adjustment basis of the single-phase step voltage regulator is based on the substation busbar, that is, the voltage level of the busbar is limited to a predetermined range to meet the voltage deviation requirements within a certain output radius based on the busbar. However, the voltage requirements at the end of the long-distance power supply line cannot be met, and the substation busbar will have several outgoing lines, each of which has a different load curve and voltage drop, so it cannot be guaranteed that the voltage of all lines meets the requirements. Therefore, this voltage regulation method is less flexible and targeted. When the feeder is complex, the voltage close to the substation is often higher, while the voltage far away from the substation is lower. Moreover, many main transformers of 35KV or 66KV small substations in rural or remote areas do not have the ability to adjust the voltage on load. The investment in transforming them into on-load voltage-adjusting transformers is relatively large, which also limits the application of this voltage regulation method.
What is a step voltage regulator?
Step voltage regulator: A device that provides a constant voltage output under varying input voltage and load current. The voltage regulation range can be divided into ±10% voltage and ±15% voltage. There are 33 steps in total; each tap is 5/8% voltage. There are 16 steps in the rising direction, 16 steps in the falling direction, and a neutral position.
Principle and use of step voltage regulator
The step voltage regulator is composed of a specially designed on-load voltage regulator and an autotransformer, which can automatically “monitor” and smoothly adjust its output voltage to keep its output voltage within the required voltage range. 32-step voltage regulation: The amplitude of each step voltage regulation is 0.625% of the line voltage.
Three basic components of a single-phase step voltage regulator
- Autotransformer – a transformer in which a portion of one winding is common to both the primary and secondary windings
- Load tap changer – a switch designed to operate under load to change the configuration of the transformer coils
- Voltage regulator control – a control that senses the system and automatically controls the tap changer. You can choose between Strong Power’s controller or SEL’s controller.
Used to solve voltage drop problems and voltage instability problems.
