YGCB遍电缆在电力系统的负

The first type: resistive load, voltage and current in phase, that is, their phase is 0, power P = I * U * Cos0 = I * U * 1 = IU (W)

第二种: 电感性负载，在交流电压正半周时充磁，吸收能量，在交流电压负半周时，产生感应电流，向电网释放能量。电流滞后电压90度相位角，

The second kind: inductance load, when the AC voltage is positive half-cycle magnetization, absorb energy, in the AC voltage negative half-cycle, produce induction current, release energy to the grid. Current hysteresis voltage 90 degree phase angle.

功率P=I*U*Cos90=I*U*0=0（W）

Power P=I*U*Cos90=I*U*0=0 (W)

第三种: 电容性负载，在交流电压正半周时充电，吸收能量，在交流电压负半周时放电，向电网释放能量。电流超前电压90度相位角，YGCB遍电缆在电力系统的负

The third type: capacitive load, in the AC voltage half a cycle charge, absorb energy, in the AC voltage half a cycle discharge, release energy to the grid. The current leads to a 90 degree phase angle.

功率P=I*U*Cos（-90）=I*U*0=0（W）

Power P=I*U*Cos (-90) =I*U*0=0 (W)

电感性负载与电容性负载，虽有电流，但是相位角是正或负90度，均不会消耗电网的功率。我们就把流过电感或电容的电流与电压的乘积，称为无功功率。对应的电阻性负载消耗的功率就叫做有功功率。

Inductive load and capacitive load, although there is current, but the phase angle is positive or negative 90 degrees, will not consume power grid. We refer to the product of the current and voltage flowing through the inductor or capacitor, which is called reactive power. The power consumed by the corresponding resistive load is called active power.

在电力系统里，存在大量的电感性负载，如变压器、马达等，它虽然不消耗电网的有功功率，但是却会使电网的电流增大，从而使线损、变损增大。电感性负载的电流与电容性负载的电流，相位角刚好相差180度，可以利用这一特性，在变压器低压侧并联电容器，来抵消电感性负载消耗的无功功率YGCB遍电缆在电力系统的负

In the power system, there are a lot of inductance loads, such as transformers, motors and so on. Although it does not consume the active power of the grid, it will increase the current of the grid, so that the line loss and loss increase. The phase angle between the current of inductance load and that of capacitance load is 180 degrees. This characteristic can be used to compensate the reactive power consumed by inductance load by shunting capacitors on the low voltage side of transformer.