Solution of harmonic control by special filter compensation device of single crystal furnace
The single crystal furnace is a kind of equipment which can be used in the inert gas environment to melt the polycrystalline materials such as polycrystalline silicon by using the direct pulling method. With the rapid growth of China's economy, the application of single crystal furnace will become more and more common. The problem of reactive power compensation can be solved by harmonic control of single crystal furnace.
Single crystal furnace application is very wide, single crystal silicon, single crystal germanium, single crystal GaAs and so many products are the electronics industry and other high-tech industry is extremely important raw materials. The single crystal furnace power 150KW, 190kw, 200kW three, users of a main transformer with multiple silicon rectifier transformer, turns ratio is generally 380V/60, circuit is mainly include: three-phase fully controlled bridge thyristor tube rectifier circuit, three-phase synchronous transformer, the main circuit protection fast fuse, a thyristor tube protection circuit of the current transformer and etc.. Three phase full control bridge thyristor rectifier circuit will produce a larger 5, 7, 11 harmonic into the grid, resulting in power grid harmonic pollution, power quality decline, the power factor is low, with an average of 0.60 ~ 0.70.
As one of the important branches of industrial furnace, single crystal furnace consumes a large amount of energy, the high cost of electricity spending, harmonic pollution caused by the decline in product quality has become the heart of many single crystal furnace users pain. Faced with a large number of domestic and foreign single crystal furnace user's urgent need for environmental protection and energy saving, many manufacturers have done a lot of useful efforts and try. Some try to system protection transient and surge, harmonic suppression products on the system of single crystal furnace technological transformation, but the practical application of that: single crystal furnace harmonic number is 5, 7, 11 times harmonic (among them 5 times the maximum harmonic content reached 40%, 7 times 20% and 11 11%, the total distortion rate reached 40-50%, and power factor general only 0.4 ~ 0.7). So can not be ignored the harmonic control equipment, energy saving effect is far from satisfactory. More serious is the harmonic current greatly exceeded the scope of electrical equipment to withstand, long-term use is easy to damage, accidents frequently, influence on the production of normal, resulting in waste of resources, so that users very upset.
Solution: we design a set of DFC-T-F single crystal furnace special filter compensation device for this kind of equipment to solve the problem effectively.
The main features of filter compensation device for single crystal furnace:
1, the filter device input power quality can be improved significantly, can improve the impact load caused by the current impact, reduce voltage fluctuation and suppress voltage flicker, improve voltage stability, improve the quality of voltage. Power factor can be increased to 0.95, allowing users to reduce line losses can improve the distribution transformer load efficiency and economic benefits obvious.
2, for the user's system specialized design and manufacture, eliminating the harmonic characteristics such as 5, 7, 11, 13 second-class, filtering effect significantly.
3, both harmonic control and reactive power compensation, harmonic currents to meet the national standard after treatment, depending on the load can be different from the average power savings of about 7-30%, to avoid reactive fines and can be rewarded accordingly.
Using the device in capacitor branch series of fixed rate of reactance reactor (such as 5.5%, 6%, 13%) method to avoid damage the capacitor, harmonic control and reactive power compensation. The reactive cabinet in normal operation. The device adopts modularized structure, intelligent control, compensate fundamental reactive power based, harmonic control for the times, after the compensation of the power factor is greater than or equal to 0.95 and harmonic suppression effect and energy saving effect is obvious. General three months to recover the cost.
Single crystal furnace application is very wide, single crystal silicon, single crystal germanium, single crystal GaAs and so many products are the electronics industry and other high-tech industry is extremely important raw materials. The single crystal furnace power 150KW, 190kw, 200kW three, users of a main transformer with multiple silicon rectifier transformer, turns ratio is generally 380V/60, circuit is mainly include: three-phase fully controlled bridge thyristor tube rectifier circuit, three-phase synchronous transformer, the main circuit protection fast fuse, a thyristor tube protection circuit of the current transformer and etc.. Three phase full control bridge thyristor rectifier circuit will produce a larger 5, 7, 11 harmonic into the grid, resulting in power grid harmonic pollution, power quality decline, the power factor is low, with an average of 0.60 ~ 0.70.
As one of the important branches of industrial furnace, single crystal furnace consumes a large amount of energy, the high cost of electricity spending, harmonic pollution caused by the decline in product quality has become the heart of many single crystal furnace users pain. Faced with a large number of domestic and foreign single crystal furnace user's urgent need for environmental protection and energy saving, many manufacturers have done a lot of useful efforts and try. Some try to system protection transient and surge, harmonic suppression products on the system of single crystal furnace technological transformation, but the practical application of that: single crystal furnace harmonic number is 5, 7, 11 times harmonic (among them 5 times the maximum harmonic content reached 40%, 7 times 20% and 11 11%, the total distortion rate reached 40-50%, and power factor general only 0.4 ~ 0.7). So can not be ignored the harmonic control equipment, energy saving effect is far from satisfactory. More serious is the harmonic current greatly exceeded the scope of electrical equipment to withstand, long-term use is easy to damage, accidents frequently, influence on the production of normal, resulting in waste of resources, so that users very upset.
Solution: we design a set of DFC-T-F single crystal furnace special filter compensation device for this kind of equipment to solve the problem effectively.
The main features of filter compensation device for single crystal furnace:
1, the filter device input power quality can be improved significantly, can improve the impact load caused by the current impact, reduce voltage fluctuation and suppress voltage flicker, improve voltage stability, improve the quality of voltage. Power factor can be increased to 0.95, allowing users to reduce line losses can improve the distribution transformer load efficiency and economic benefits obvious.
2, for the user's system specialized design and manufacture, eliminating the harmonic characteristics such as 5, 7, 11, 13 second-class, filtering effect significantly.
3, both harmonic control and reactive power compensation, harmonic currents to meet the national standard after treatment, depending on the load can be different from the average power savings of about 7-30%, to avoid reactive fines and can be rewarded accordingly.
Using the device in capacitor branch series of fixed rate of reactance reactor (such as 5.5%, 6%, 13%) method to avoid damage the capacitor, harmonic control and reactive power compensation. The reactive cabinet in normal operation. The device adopts modularized structure, intelligent control, compensate fundamental reactive power based, harmonic control for the times, after the compensation of the power factor is greater than or equal to 0.95 and harmonic suppression effect and energy saving effect is obvious. General three months to recover the cost.
| Datetime：2016.03.29 From：the site Views：