What happens without capacitive compensation?

As long as the capacity of the transformers and cables is sufficient, it has no impact on the equipment listed below. However, the power factor decreases (moving in a lagging direction), the reactive current increases, resulting in wasted electrical energy in the grid. Since the real power remains unchanged while the reactive power increases (due to the lack of compensation), the apparent power also increases, thereby increasing the load on the transformer (cable) at the higher level!

Agree with what was said above. The function of a capacitive compensation device (reactive power compensation device) is to compensate for the reactive power required by electrical equipment. Reduce the reactive load on cables and power supply transformers, increase the active load, improve the loading capacity, and reduce losses.

In ordinary factories, where there are many inductive loads, using capacitive compensation can improve voltage, reduce line losses, lower electricity costs, and save energy.

What was said upstairs is already very comprehensive; a capacitive compensation screen can be understood as a power source that provides reactive power on-site. If your factory has many resistive loads or frequency converters are widely used, and the power factor of the power grid is already above 0.9, it may not be necessary to use it either.

Reply to 5# luweidong: Why is capacitor compensation not needed once frequency converters become widespread? The inverter is equipped with a motor, but isn’t the motor still an inductive load?

There won’t be any problems; it’s just that the power factor doesn’t increase, which leads to significant waste of electrical energy. Sometimes, electricity regulatory authorities impose fines for this

Since the DC section of commonly used AC-DC-AC inverters already contains large internal capacitors, the power factor of the loads connected to these inverters is very high.

This post was last edited by zhaohh3211 on 2011-8-31 16:27. It’s not that a fine might be imposed sometimes; rather, a fine is definitely imposed. Unless you are a small business owner. For large-scale industries, if the value is below 0.9, it’s time to pay up. There is a reward for values above 0.9.

The power factor will decrease, and the most direct consequence is fines imposed by the electricity supply company; we have already been fined over 1 million. . .

cosφ = real power / apparent power. To understand the role of reactive power compensation capacitors, it is necessary to start with reactive power. A portion of the energy in electricity is used to create magnetic fields, which serve as a means for exchanging energy; these magnetic fields do no work on the external circuit. The energy is converted from electrical energy into magnetic field energy, and then back again from magnetic field energy into electrical energy, in a continuous cycle without any loss. This portion of energy is known as reactive power. Reactive power is not useless; without it, an induced magnetic field cannot be created, and devices such as motors and transformers cannot operate. In addition to the reactive power required by the load, it is also needed for line inductance, transformer inductance, etc. The specific benefits are numerous: for example, compensating for reactive power can raise voltage levels, reduce line losses, lower electricity costs, save energy, increase the active capacity transmission in the power grid, and improve the efficiency of equipment usage