FC harmonic elimination capacitor compensation device
Product overview
JHFC series intelligent capacitors take two (△ type) or one (Y type) low-voltage power capacitors as the main body, and adopt microelectronic software and hardware technology, micro sensing technology, micro network technology and electrical manufacturing technology to make them intelligent, miniaturized and modular. It is a major breakthrough in low-voltage power reactive power automatic compensation technology. It can be flexibly used in various occasions of low-voltage reactive power compensation, changing the structural mode of traditional reactive power automatic compensation equipment. It has many advantages, such as simple structure, simple production, low cost, improved performance, simple maintenance and so on.
Action principle of each component
1. MCU intelligent measurement and control part
All electronic components in the intelligent measurement and control module adopt wide temperature type and industrial grade, which can adapt to the harsh environment with large temperature changes and serious electromagnetic interference, and can work reliably for a long time without interruption, with a high degree of intelligence and stable control performance.
2. Zero crossing switching synchronous switch technology based on mechanical contact
The company summarized the characteristics and disadvantages of mechanical contactors, contactless thyristors and composite switches, and combined with years of development and practical operation experience, independently developed a new generation, using microelectronic software and hardware technology to control the contacts of mechanical electromagnetic relays; Realize the zero crossing switching synchronous switching technology of low-voltage power capacitor based on mechanical contact, so that the AC current at both ends of the contact is zero, and the AC voltage at both ends is zero when the contact is closed. Avoid the impact of inrush current generated when the capacitor is put into operation on the system voltage. Reduce equipment losses and improve the service life of capacitors.
3. Low voltage power capacitor
The low-voltage power capacitor in the product adopts the self-healing low-voltage parallel compensation capacitor, and the progressive thickened zinc aluminum metallized polypropylene film is used as the dielectric in the capacitor, which has high stability and reliability. Among capacitors of the same brand, the larger a single capacitor is, the longer its core element is and the thicker its diameter is. The length of the element leads to the increase of resistance loss. If the element is thick, the area of the end conductive layer is large and the temperature difference between the inside and outside of the element is increased, which makes the conductive layer easier to separate from the electrode plate. Therefore, the reliability of using a single high-capacity capacitor in parallel is not as high as using a small capacity capacitor, and the switching stages of the capacitor can also be effectively increased. At the same time, the built-in temperature sensor of the capacitor reflects the internal heating degree of the capacitor under the conditions of overvoltage, over harmonic, large leakage flow and high ambient temperature, so as to realize over-temperature protection.
Product features
It realizes the combination of measurement and control technology and synchronous switch, controls the movement speed of the switch, improves the service life, tracks and corrects the closing phase angle, and realizes the service life of the switch for millions of times. Compared with the existing similar intelligent power capacitors, they have many advantages, such as high reliability, low fault, low power consumption, long life and so on.
There is no inrush current when closing, realizing capacitor voltage zero crossing input and current zero crossing removal. Synchronous switching can avoid switching overvoltage, no overvoltage breakdown, no arcing and reignition.
It can be compensated in an appropriate way, with perfect control functions, complete functions and good performance. It can also be configured with a variety of peripherals to meet different customer needs.
The product has complete measurement and protection functions, including temperature in the control room, harmonic content of the power grid, open phase, three-phase imbalance, etc.
The product can be used by multiple building blocks. When in use, the main machine is automatically generated, and the rest are slaves, forming a reactive power automatic control system. Individual faults automatically exit from the slave machine, which does not affect the work of other machines. If the host fails, it will automatically exit, generate a new host, form a new system, and work with a high degree of intelligence.
The single capacitor shows the working condition of the product and the condition of the electrical circuit, and the man-machine dialogue is simple and intuitive.
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