What is reactance? What is the role of the reactor

Reactance

Similar to the hindering effect of resistance on the current in a DC circuit, in an AC circuit (such as a series RLC circuit), capacitance and inductance will also hinder the current, which is called reactance (Reactance), and its unit of measurement is also called ohm. In AC circuit analysis, reactance is represented by X, which is the imaginary part of complex impedance, and is used to represent the resistance of inductance and capacitance to current. Reactance varies with the frequency of an AC circuit and causes a phase change in the circuit current and voltage.

What is a reactor? The so-called reactor, also known as an inductor, is widely used in circuits. There should be a certain inductance in the circuit because of the effect of battery induction, and the reactor can play a role The effect of preventing the change of current.

The role of the reactor: the main function of the reactor is to convert electric energy into magnetic energy and store it. Currently, the more common reactors include series reactors and shunt reactors. Among them, the series reactor is mainly used to limit the short-circuit current. Protection, while the shunt reactor is used to adjust the operating voltage.

The addition of the incoming line series reactor is mainly to suppress the grid-side harmonics of the incoming power supply, which will increase the short-circuit impedance of the main circuit of the incoming power supply. Consider whether to use this inverter based on flexibility.

The main function of the outgoing line series reactor is to balance the distributed capacitive load of the outgoing cable and increase the short-circuit impedance of the main circuit of the outgoing line; it can also suppress the harmonics output by the frequency converter and reduce the noise of the frequency converter; more than two frequency converters When running in parallel, it also plays a role in limiting commutation circulation and load balancing. The former considers the length of the cable to determine whether to use it, while the latter must be used.