Power Capacitor as the Key Power in the Electric Power System

In modern power systems, power capacitors play a vital role, like a silent hero behind the scenes, for the stable transmission and efficient use of electricity.

Popular knowledge of power capacitors

1. Principle of operation

Power capacitor is a passive electronic components used to store electrical energy. It is based on the principle of electric field energy storage, by filling the insulating medium between the two electrode plates, when the voltage is applied to the electrode plate, the electrode plate will accumulate charge, thus storing electric energy. The amount of charge stored is proportional to the voltage applied, proportional to the area of the electrode plates, and inversely proportional to the distance between the electrode plates. This characteristic enables power capacitors to play a variety of important roles in power systems.

2. Main Functions

- Reactive power compensation

In the power system, due to the existence of a large number of inductive loads (such as motors, transformers, etc.), they will consume reactive power, resulting in a decrease in the power factor, which affects the efficiency of the power system and the quality of power. Power capacitors can provide reactive power to compensate for the reactive power required by inductive loads, improve the power factor, reduce line losses, and improve the stability and economy of the power system.

For example, in a factory power distribution system, after installing suitable power capacitors for reactive power compensation, the efficiency of power transmission is significantly improved and the monthly electricity bill may be reduced.

- Filtering

There are various harmonic disturbances in the power system, and these harmonics can affect the normal operation of the power equipment or even damage the equipment. Power capacitors can cooperate with other filtering devices to shunt and filter harmonic currents and reduce the harm of harmonics on the power system.

For example, in some electronic equipment concentrated places, power capacitor filtering function can protect electronic equipment from harmonic interference, stable operation, prolong the service life of the equipment.

- Improvement of voltage quality

When the load changes in the power system, it will cause voltage fluctuations. Power capacitors can quickly respond to load changes, stabilise the system voltage by releasing or absorbing electrical energy, and ensure that the power equipment operates at the appropriate voltage.

In the power supply system of residential areas, power capacitors can effectively alleviate the problem of voltage drop during the peak of power consumption, and ensure the normal use of electrical appliances in residents' homes.

3. Application fields

- Power system

In power plants and substations, they are used to improve power factor, improve voltage quality and stabilise system operation.

In transmission lines, series compensation capacitors can improve the transmission capacity of transmission lines and reduce line losses.

- Industrial field

Power capacitors are needed for reactive power compensation and filtering of motor drive systems, electric furnaces and other equipment in factories to improve productivity, reduce energy consumption and ensure normal operation of the equipment.

In the chemical industry, for example, the stable operation of power capacitors is essential to ensure the continuity of the production process and product quality.

- Construction

Power capacitors are indispensable in the power distribution systems of commercial buildings and residential communities to ensure the stability of power supply and power quality, and to meet the power needs of various electrical equipment.

- New Energy

In solar photovoltaic power generation and wind power generation systems, power capacitors are used to smooth out power fluctuations, improve power quality, and ensure the stable integration of new energy power into the power grid.

Power Capacitor Products

Zhiyue has an excellent product line in the field of power capacitors, and its Power Capacitor category covers a wide range of high-quality products to meet the needs of different customers.

1. Low Voltage Power Capacitor

* Features

Adopting advanced film technology and unique design structure, they have the advantages of small size, light weight and low loss.

With good self-healing performance, when partial discharge occurs inside the capacitor, it can automatically repair the insulation and prolong the service life of the capacitor.

Wide operating temperature range, suitable for a variety of different environmental conditions, whether in the hot summer or cold winter, can work stably and reliably.

* Application Scenarios

Widely used in low-voltage power distribution systems, such as lighting systems and air-conditioning systems in commercial buildings, as well as production equipment in small factories.

In some occasions where space is limited, its compact size is especially advantageous, and it can be conveniently installed in the distribution cabinet without taking up too much space.

2. High Voltage Power Capacitor

* Features

With high voltage resistance performance, can withstand higher voltage levels, to ensure safe and stable operation in high-voltage power systems.

Adopting high-quality insulating materials and strict production process, it has good insulation and heat dissipation performance, which effectively reduces the failure rate of the capacitor.

With high precision, it can accurately provide the required reactive power compensation and improve the power factor and power quality of the power system.

* Application Scenario

Mainly used in high-voltage substations, power transmission lines and other high-voltage power occasions, it is an important part to ensure the stable operation of high-voltage power system.

In the high-voltage motor drive system of large industrial enterprises, high-voltage power capacitors also play a key role in providing reactive power support for high-power equipment and improving the operating efficiency of the equipment.

3. Capacitor bank

* Characteristics

Combined with multiple capacitor units, the capacitor capacity and number of banks can be flexibly configured according to different application requirements.

Equipped with perfect protection devices, such as over-voltage protection, over-current protection, temperature protection, etc., to ensure the safety and reliability of the capacitor bank during operation.

With good consistency and stability, each capacitor unit can work together to achieve efficient reactive power compensation and power quality improvement.

* Application Scenarios

Suitable for large industrial plants, commercial complexes and other places with large demand for reactive power compensation, capable of providing a large amount of reactive power centrally to meet the needs of the entire system.

In the reactive power compensation station of the power system, capacitor bank is one of the core equipments, which is used for centralised reactive power compensation of the power grid to improve the power factor and voltage stability of the power grid.

4. Capacitor Switch

* Features

With fast switching capability, it can accurately control the input and removal of capacitors in a short time to achieve dynamic compensation of reactive power.

With high operating precision and high reliability, it can effectively avoid the impact on capacitor and power system caused by misoperation and frequent action.

With intelligent control function, it can automatically adjust the capacitor casting and cutting strategy according to the real-time operation status of the power system, so as to improve the effect and efficiency of reactive power compensation.

* Application Scenarios

Often used in occasions of fast reactive power changes, such as some industrial production lines with large intermittent loads, through the fast response of the capacitor switch, it can track the load changes in a timely manner and keep the power factor of the power system stable.

In the construction of smart grid, the intelligent control function of capacitor switch cooperates with other intelligent devices to achieve the fine management and optimal operation of the power system.

In conclusion

With its advanced technology, excellent performance and wide range of application scenarios, Zhiyue's Power Capacitor products provide strong support for the stable operation of power systems and the improvement of power quality. Zhiyue's products have demonstrated strong competitiveness and adaptability in both the traditional power field and the emerging new energy field, and have become the trusted choice of customers. Choosing Zhiyue's Power Capacitor products is choosing an efficient and reliable power solution, injecting strong power into your power system and helping your business to flourish.