Reactive power compensation is now a method that many enterprises choose to improve the efficiency of power consumption, and use compensation technology to assist the power grid system to save energy and reduce consumption.
Under the action of reactive power compensation technology, low-voltage capacitors not only improve the power factor, control the active power consumption, but also optimize the power quality and improve the power supply quality of the power grid system. This is the value of reactive power compensation of low-voltage capacitors and the future power trend.
How does reactive power compensation save energy and reduce power consumption? Today we will have a detailed understanding of the reactive power compensation of capacitors. After reading it, you will understand.
First, the reactive compensation method is divided into two categories:
1. Local compensation. The reactive power compensation method adopts a parallel connection mode, and the low voltage capacitor is connected in parallel to the line of the electric equipment to control the running electric charge, provide power compensation, and ensure the high quality of the electric energy by controlling the electric equipment;
2. Centralized compensation, centralized compensation and local compensation. The obvious non-energization is that the low-voltage capacitor needs to be connected to the bus system of the power grid. The reactive power compensation is completed within the scope of the power supply of the power grid, which reflects the centralized compensation characteristics, but cannot provide large Reactive compensation of the area.
Second, the requirements of low voltage capacitor reactive power compensation technology
1. Maintain the same amount of relationship in low-voltage capacitors, strictly control the reactive power compensation application of low-voltage capacitors, and make them meet the requirements of grid power control;
2. Control the rated state of the low-voltage capacitor to ensure that the parameter variation of the capacitor can be maintained within the rated range;
3. Optimize the performance of low-voltage capacitors to meet the operational needs of reactive power compensation technology;
4. Standardized charge closing to prevent residual charge in the operation of the capacitor and improve the closing efficiency, thus ensuring the standardization of reactive power compensation technology and the practicality of reactive power compensation.
Third, the control of reactive power compensation technology of low voltage capacitors
1. Avoid harmonic hazards
When a voltage containing power harmonics is applied across the capacitor, the harmonic impedance of the capacitor is small, and the harmonic current is superimposed on the fundamental wave of the capacitor, causing the capacitor current to increase, the temperature to rise, and the life to be shortened, causing the capacitor to pass. The load may even explode, and the harmonics may also cause power harmonic resonance in the grid together with the capacitor, which will aggravate the fault.
In the process of reactive power compensation of low-voltage capacitors, attention should be paid to the avoidance of harmonic hazards. The reactor can be installed in the line to assist the operation of the low-voltage capacitor, and the reactor can be connected in series to control the harmonic phenomenon.
Reactors should account for 4.5% of the ratio. If the harmonics in the reactive compensation of low-voltage capacitors are not strong, the ratio can be controlled at 0.5%, thus perfecting the application of reactive power compensation of low-voltage capacitors in the power grid.
2, optimize the switching method
For the reactive power compensation of low-voltage capacitors in the power grid, it is necessary to optimize the switching mode and improve the application efficiency of reactive power compensation technology. The low-voltage capacitors can be divided into manual and automatic types. According to the requirements of reactive power compensation technology, accurate switching methods are designed. It is conducive to perfecting the reactive power compensation device and ensuring the accuracy of the switching of the low voltage capacitor.
In the power grid system, the staff should strengthen the application of reactive power compensation for low-voltage capacitors, actively improve the power factor in the power grid system, implement the application of reactive power compensation technology, reduce the reactive power in the grid operation, and improve the power quality of the power grid system. To regulate the operation of the grid system to avoid quality problems.