The AVR or automatic voltage regulator is used to control the voltage. It takes the fluctuating voltage and turns them into a constant voltage. The inconstancy in the voltage mainly occurs due to the variation in load on the supply system. The distinction in voltage damages the equipment of the power system. The variation in the voltage can be regulated by installing the voltage control equipment at several places like near the transformers, generator, feeders, etc. The AVR is implemented at more than one point in the power system for managing the voltage variations. In the DC supply system, the voltage can be controlled by using over compound generators in the case of feeders of the same length, but in the case of feeders of different lengths, the voltage at the end of each feeder is retained constant using a feeder booster. In an AC system, the voltage can be controlled by using different methods likes booster transformers, induction regulators, shunt condensers, etc. The three-phase AVR is a large-scale voltage auxiliary power supply developed and designed for 380V industrial power. The general three-phase AVR is at least 10KVA to thousands of KVA. Among them, the three-phase AVR and the line access are all three-phase electricity, and it is not a neutral line of a three-phase live wire.
What is a generator automatic voltage regulator(AVR)?
An automatic voltage regulator (AVR) is a solid-state electronic device for automatically maintaining generator output terminal voltage at a fixed value. It will work and do this as the generator load or operating temperature shifts. The AVR is part of the alternator’s excitation system. It controls output by sensing the voltage from the generator terminals and comparing it to a steady reference. The error signal is then used to control the field current by increasing or decreasing the current flow to an exciter stator, which in turn will lead to a lower or higher voltage at the primary stator terminals.
Use of the automatic voltage regulator
The key functions of an AVR are as follows-
It controls the voltage of the system and has the operation of the machine nearer to the steady-state durability.
It separates the reactive load between the alternators operating in parallel.
The automatic voltage regulators decrease the overvoltages which occur because of the sudden loss of load on the system.
It enhances the excitation of the system under fault situations so that the highest synchronizing power endures at the time of clearance of the fault.
AVR can be divided into industrial AVR and household AVR according to their various applications. According to voltage, they can be divided into three-phase AVR and single-phase AVR. With the advancement of science and technology, power companies remain to develop their funds, use voltage stabilizers to improve and upgrade electrical equipment, and the electrical background has gradually become stable and safe. The Automatic Voltage Regulator (AVR) can automatically adjust the input voltage into the desired output voltage required by the appliance. This three-phase AVR is implemented with isolation transformers in a delta-star configuration. This provides and clear, isolated supply to the load with a ‘new’ neutral connection. The AVR is made up of three identical single-phase regulator units. Each of these monitors its output voltage and regulates for variations in mains supply voltage to control an output voltage within close limits. When the AVS function is applied, the outputs from the regulator are connected through a contactor to the load. The contactor is managed by a three-phase Automatic Voltage Switcher PCB which controls the AVR outputs. This connects the load only when all the phase voltages are within adequate limits. There is a delay function in the AVS to prevent repeated switching of the load. For three-phase loads, it is normally more cost-effective to use a three-phase AVR. A three-phase automatic voltage regulator might control all three phases concurrently or it might control each phase separately, depending on the configuration of the AVR. The three-phase AVR is based on a three-phase voltage selector system that is a quality, low-cost system that automatically controls the selected phase voltage while providing a continuous power supply to be delivered to the load. The system is created and advanced using elements such as autotransformers that produce voltage regulation and high-power relays that complete the task of switching between steps.
RightPower is a trusted AVR supplier in Malaysia. We want to assure customers can buy the best voltage protection device for their appliances. Right Power Technology now has the superior distinction of being a significant player in the industry, education, and commercial fields and we provide the full range of heavy-duty and high-performance Industrial Automatic Voltage Regulators (AVRs), ranging from 800VA to 10,00KVA. To know more about us, visit our official website.