It is designed according to the nature of the load and is suitable for situations where the load is stable and the switch is not frequent. HN-MSC series low-voltage intelligent reactive power compensation devices include HN-MSC/A series and HN-MSC/B series. The former is used for three-phase balance compensation and the latter is used for three-phase imbalance compensation. The device adopts HN-I low-voltage intelligent reactive power compensation controller and special contactor with current limiting resistance to automatically switch the power capacitor bank. HN-MSC series devices can increase the power factor of power lines from about 0.65 to over 0.95, increase the transmission capacity of transformers and lines by over 15 ~ 30%, and reduce the line loss by 25 ~ 50%. The device is economical, practical and cost-effective. It has achieved good effects of stabilizing voltage, improving power quality and saving electricity.
Second, HN-MTC (Mechanical Thyristor Capacitor) intelligent compound switch switching series.
Zero-crossing switching, real-time dynamic compensation, suitable for most industrial occasions. This product consists of intelligent compound switch, HN-Ⅱ distribution monitor and other important components. Intelligent compound switch is the best choice switch for a new generation of switching power capacitors. Through the parallel operation of thyristor switch and magnetic latching relay switch, zero-crossing switching and relay operation without power consumption can be realized. That is, it is operated by SCR during switching and by magnetic latching relay during operation. The zero-crossing switching of silicon controlled rectifier not only eliminates the influence of surge current and overvoltage generated in the switching process of traditional devices on power capacitors and power equipment, but also has the advantages of no power consumption and no temperature rise during the operation of magnetic latching relay. Compared with similar products, the technology is advanced. High efficiency and low consumption, environmental protection and energy saving, greatly extending the service life of power capacitors and power equipment. In June 2002, the product passed the testing of the quality testing center of the complete reactive power compensation device of the Ministry of Electric Power Industry.
Three. HN-TSC thyristor switching capacitor series
It integrates harmonic control and reactive power compensation, and is suitable for situations where the load changes rapidly. HN-TSC series adopts Israeli elspec technology, which is the only contactless dynamic reactive power compensation device in China that can really switch all capacitor banks within 5-20 ms, with excellent quality of real-time and no transient, and remarkable energy-saving effect. The specific inductance in the system can prevent harmonic amplification, effectively absorb most harmonic current, and achieve the purpose of harmonic control; Accurate zero-crossing switching fundamentally eliminates inrush current, greatly improves the service life of the device, and the average life of the capacitor is as long as 10 year. The technology and performance are ahead of many "quasi-real-time dynamic compensation devices", and the products are favored by users, especially those with rapidly changing loads.
According to the response speed, the products are divided into EQ type (5 ~ 20 ms), that is, all capacitor segments are cut off in 5 ~ 20 ms; AR type (1 ~ 3s), that is, 1~3S cuts all capacitor segments (typical use). AR series standard products with 7% reactance are suitable for most industrial occasions because of their excellent cost performance.
Iv. HN-GY 1 contactor control type
HN-GY 1 series high-voltage automatic reactive power compensation devices are suitable for centralized or decentralized compensation of 6-35kV lines and substations. Using the comprehensive indexes of reactive power and voltage of power grid, the automatic switching of capacitor banks by stages is realized through the special vacuum contactor for capacitors with independent intellectual property rights. Effectively improve the overall power factor of the power grid, reduce the line loss, and achieve the purpose of saving energy, reducing consumption and stabilizing the power grid voltage.
HN-GY2 SCR controllable reactor+fixed capacitor type (TCR+FC)
In recent years, large-scale power electronic equipment has been widely used in power system, and nonlinear components in electronic equipment will cause system voltage waveform distortion, thus forming higher harmonics. On the one hand, higher harmonics increase the energy consumption of power system and various loads, and at the same time reduce the natural power factor of the system, and even cause damage to various electronic equipment including reactive power compensation devices and capacitor explosions.
In addition, when the large impact load (such as rolling mill, electric arc furnace, etc. ), it will cause voltage fluctuation and flicker of the power supply system, further worsen the power quality of the system, cause the lighting equipment to flicker, and other precision equipment connected to the system cannot work normally.
With the maturity of high voltage thyristor technology and the continuous decline of manufacturing cost, more and more users use thyristor to control reactors and fixed capacitors, that is, TCR+FC dynamic reactive power compensation device to improve power quality. It mainly has four functions: restraining voltage fluctuation, improving power factor, absorbing power grid harmonics and reducing power loss.
Six, HN-GY3 power system filter
With the wide application of high-power electric ballast, nonlinear electric load (such as electric arc furnace) and a large number of household appliances, the higher harmonics in the power supply system are becoming more and more serious, which constitutes "electric energy pollution" to the power supply system and a large number of electrical equipment. It makes the control and protection equipment of power system malfunction, and even produces parallel resonance overvoltage, which threatens the safe operation of power system. For example, the heating of high-voltage cable increases and the loss increases; The power capacitor explodes and bulges due to overvoltage; Higher harmonic interference reduces the communication quality; Electronic equipment such as computers can't work normally or even be damaged.
The main function of the filter is to compensate the reactive power of the power supply system on the one hand and control the harmonics of the power grid on the other. The high and low voltage harmonic control device jointly developed by our company and China University of Science and Technology has the characteristics of advanced technology and excellent performance, such as on-line harmonic test of power supply system, theoretical analysis and automatic design of filter parameters by computer software. It can purify power supply, reduce power loss and improve power quality. Widely used in metallurgy, chemical industry and electrified railways.
Seven, HN-2000 electrical automation monitoring system
HN-2000 electrical automation monitoring system is constantly developing on the basis of many years of operating experience of electrical automation system, combined with new technologies and protocols. It consists of three levels: interval layer protection measurement and control equipment, intermediate communication layer and background monitoring system. It integrates measurement, protection, communication and control, with perfect functions, reliable operation, flexible configuration and friendly interface. In 2005, it won the second prize of Anhui Science and Technology Progress Award.
Eight, HN-2000 series microcomputer protection measurement and control device
HN-2000 series microcomputer protection measurement and control devices are mainly used in power plants and station systems with voltage levels of 35KV and below, and realize protection, measurement, control, communication monitoring and other functions.
Nine, Hw series microcomputer comprehensive protection device
Hw series microcomputer comprehensive protection device is a relay protection product integrating single chip microcomputer technology, analog electronic technology and relay protection technology. Our company has nearly ten years of experience in producing and operating this series of products, and has independent patent anti-interference technology. This series of products can provide complete sets of comprehensive protection for motors, transformers, capacitors, feeders and bus PT. , has been widely used in electric power, metallurgy, energy, chemical industry, light industry, municipal and other national key projects. And obtained 1998 national key new products.
X.HN-2400 series under-voltage protection measurement and control device
HN-2400V series devices are mainly suitable for distribution systems below 400V. They have the functions of protection, measurement and control, support fieldbus, and can be networked to form an automation system.