The main functions of reactors include isolating circuits, balancing voltage, enhancing current, limiting current, storing electrical energy, limiting and filtering current, reactive power compensation, improving the performance of motors and frequency converters, protecting motors and power grids, and enhancing equipment stability and reliability.
1. Isolation circuit: The reactor can isolate the circuit, divert the electrons in the circuit, avoid the accumulation of a large number of electrons in the circuit, reduce the circuit load, and ensure the normal operation of the circuit.
2. Balanced voltage: In the power system, reactors can be used to balance voltage, minimize voltage differences between phases, and prevent line overload faults from occurring.
Enhance current and limit current: Reactors can enhance current to the desired value, while also limiting the flow of current and protecting other components in the circuit from damage caused by current overload.
3. Storage of electrical energy: When the circuit requires a certain degree of energy reserve, the reactor can store a certain amount of energy.
4. Current limiting and filtering: Reactors can reduce short-circuit currents and maintain the voltage of the system at the moment of short-circuit. At the same time, installing damping reactors in capacitor circuits can suppress the filtering effect of inrush currents and various harmonics.
5. Reactive power compensation: The reactor plays a role in stabilizing the voltage of the power system, effectively compensating for the reactive power coefficient of the power system, and suppressing voltage fluctuations in the reactive power compensation device.
6. Improve the working performance of electric motors and frequency converters: The main purpose of the electric motor side reactor is to improve the working performance of the electric motor at low frequencies, reduce current peaks, and improve motor efficiency; The power grid side reactor is designed to improve the impact of the frequency converter on the power grid during operation and reduce the high-order harmonic components in the power grid.
7. Protecting the motor and power grid: By adding appropriate reactors, the load on the motor can be reduced, the peak current can be reduced, the motor efficiency can be improved, the motor service life can be extended, and the frequency of maintenance and replacement can be reduced; Simultaneously protecting the power grid and other electrical equipment, reducing the harmonic content in the power grid, and ensuring the normal operation of the power grid and other equipment.
9. Improve the stability and reliability of equipment operation: By adding reactors to stabilize current and voltage, the stability and reliability of equipment operation can be improved.
In summary, reactors play multiple roles in circuits, from simple current control to complex power system stability and protection, all of which play indispensable roles.