Induction motor reactive compensation
The electric motor is a large number of electrical equipment in the factory, and it is also the main inductive electrical equipment in the low-voltage power grid. When the motor is working, the reactive power loss due to electromagnetic conversion accounts for more than 70% of the reactive power loss in the low voltage electric arc. In order to reduce the reactive power loss and improve the motor power factor, the state has issued a mandatory national standard for economic operation of three-phase asynchronous motors. Enterprises should reasonably configure reactive power compensation devices to achieve a power factor of more than 90%. After the reasonable implementation of the reactive power compensation device. Enterprises can obtain significant economic benefits.
Second, the benefits of reactive power compensation
1. Save energy and reduce electricity expenses. For example, a company uses a 315KVA distribution transformer. The comprehensive power factor of the enterprise is 0.8. The power rate adjustment fee should be increased by 2.5%; if it is increased to above 0.96, the electricity fee should be reduced by 1.1%. Obviously, after the power solid number is increased, the electricity bill will be reduced by about 3.6%.
2. Improve the load capacity of power supply equipment and save power supply stickers. Still taking the 315KVA transformer as an example, in the case of a power factor of 0.8, it can only carry 252KW of active load. If the production plan is expanded. Transformer capacity is becoming increasingly inadequate. If 40KW of new equipment is put into production, a distribution transformer of 50KVA must be added. Only the power supply cost is up to 20,000 yuan, plus equipment purchase fee and installation fee. The enterprise investment will reach 4 to 50,000. yuan. If you can configure Ankerui's ARC power factor controller (with self-healing capacitor capacity 20KVAR), the power factor can be increased to more than 0.92, and the original transformer can carry a work load of 290KW, which basically meets the needs of new equipment. The purchase and installation fee of the reactive power compensation device is less than 10,000 yuan. Can save a lot of money for the company.
3. Reduce line voltage drop, improve power supply quality and extend the service life of electrical appliances. After adopting the ARC power factor controller, the motor distribution line current can generally be reduced by 10-20%, and the equipment terminal voltage can be increased by about 5%, which has obvious benefits for the service life and product quality improvement.
Third, the results of practice
Practice has proved that the selection of ARC power factor controller is not only a new energy-saving and easy-to-implement technology, but also can improve the power factor of the enterprise, reduce the reactive current of the distribution line, reduce the loss and improve the quality of the power supply. Improve the efficiency of the motor and the output of the power supply equipment. It should be promoted as soon as possible in the factory.
