What are the methods of reactive power compensation for low-voltage power grids?

Low-voltage centralized compensation method reduces energy efficiency

The low-voltage centralized compensation method is mainly to perform centralized compensation on the 380V side of the distribution transformer, through the use of a low-voltage parallel capacitor cabinet controlled by a microcomputer. This compensation method has the following effects:

(1) The compensation capacity is relatively large and can be used for thousands of containers;

(2) The tracking performance is better, and the corresponding amount of compensation can be made according to the fluctuation of the user's compliance level, and the supply is balanced;

(3) Compensation is economical. This compensation method can help the loss of the power distribution process to a certain extent, and the investment and maintenance costs are borne by the dedicated transformer users, reducing the cost input of the power supply company.

2. Intermediate synchronization or static compensation to maintain smooth compensation

In the actual operation process, the following aspects should be paid attention to:

(1) Choose a reasonable regulation point, that is, the voltage support point of the transmission grid and the junction point between the voltage regulation transmission grid and the first-level voltage grid of the power receiving area to design the reactive power compensation device;

(2) Determine a reasonable compensation adjustment range to reduce the influence of external forces;

(3) Continuous tracking and maintenance. Although this compensation has a high automation program, some problems such as being affected by bad weather will also occur. You should pay attention to observe at any time and correct abnormal situations in time.

Distributed compensation for user terminals to improve voltage utilization

Users are the final link in the power transmission process. If distributed compensation can be performed at the user terminal, not only can the voltage utilization rate be improved, but also the user's electrical equipment can always be kept within a certain voltage regulation value, reducing the occurrence of damage.

In short, in the reactive power compensation of low-voltage power grids, not only the specific characteristics of low-voltage lines should be analyzed, but also the specific characteristics of low-voltage lines should be analyzed in reactive power compensation. An energy-saving mode that conforms to voltage operation will definitely improve the operating efficiency of the low-voltage power grid.