Concept of reactive power The instantaneous product of voltage and current is the 0 power flow;however,only the in-phase part can be used to do work(for example 0.010.020.030.040.050.060.070.080.09 0.1 current overcome friction in a motor, voltage or heat an element) the portion of power flow that is temporarily stored in the 2 form of magnetic or electric fields,due to inductive and 0 0.010.02 0.030.040.050.060.070.080.09 0.1 Im capacitive network elements, and then returned to source, is known as reactive power. 电力集镜广城测量与控制四川省重点实脸室 家电电力系统广域测量与控制四川省重点实验室 Concept of reactive power  The instantaneous product of voltage and current is the power flow; however, only the in-phase part can be used to do work (for example overcome friction in a motor, or heat an element)  the portion of power flow that is temporarily stored in the form of magnetic or electric fields, due to inductive and capacitive network elements, and then returned to source, is known as reactive power. 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 -4 -2 0 2 4 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1 -4 -2 0 2 4 current voltage