what is the imp of reactive power in power system?

Question

there are active and reactive power in power system.
active power supports the load and do the useful work
then ehy we need reactive power

Answer 1

Optimum allocation of reactive power for voltage stability improvement in AC-DC power systems
The dependence of the system voltage stability on reactive power distribution forms the basis for reactive power optimisation. The technique attempts to utilise fully the reactive power sources in the system to improve the voltage stability and profile as well as meeting the reactive power requirements at the AC-DC terminals to facilitate the smooth operation of DC links. The method involves successive solution of steady-state power flows and optimisation of reactive power control variables using linear programming techniques

Answer 2

Reactive power provides the important function of regulating voltage. For example assume two persons traveling on a Bi-cycle. One is cycling and the other just sits behind him. If the second person suddenly got moved/bends aside while traveling (same as that of power fluctuations), then the first person will automatically bends in the opposite direction of second person to balance the bi-cycle. Here 1st person - Reactive Power & 2nd person - Active Power.

So, it is not possible to push the power demanded by loads without reactive power. That is why few people call it as compensating power.

Disclaimer: The above example is to show up the very purpose of reactive power. Two persons traveling on a bicycle is a mandate assumption in the above case.

Reactive power is used for magnetising the core for resistive load lik iron box, heater reactive power component is zero bcoz it oly does useful work but never stores any energy lik inductor or capacitor...

https://www.electrikals.com/

Answer 3

The IMPORTANCE of reactive power depends on the validity of the catalyst that triggered the reaction, and its scale in reference to the power demands and grid capacities. Often, capacitance built into such systems buffer the overload or transformers can change characteristics, assuming phase is the same. Active and reactive power are the same stuff, it's the potential energy available to a system that is of importance when the grid is going to be stressed that is critical. The catalysts are usually within the scope of predermined stress capacities of the network.