CoEpo DVR adopts power electronics technology, when the system voltage drops suddenly, the DVR can realize the fast regulation of the voltage, at the same time eliminate the voltage three-phase imbalance, and have the adjustment voltage deviation, ensure the seamless connection of the output voltage to the rated value, and protect the normal operation of the load.
CoEpo DVR Basic Parameters
Input Voltage: 208V/400V/480V/10KV，Or Customize Voltage Level;
Single capacity range: 30KVA~4000KVA；
Fast voltage sag correction, response time up to 2 bệnh đa xơ cứng；
Low energy consumption (less than 1%), high efficiency, small area；
Độ tin cậy cao；
Eliminate voltage three-phase imbalance at the same time；
Control voltage fluctuation, eliminate flicker；
Phase angle error correction;
Easy installation, no maintenance;
Excellent voltage regulation accuracy, single machine capacity.
Voltage sag is the most important power quality problem in industry. The factory can not predict the occurrence of a voltage sag accident in advance!
Voltage sag is also called voltage drop, voltage sag, and dangle, vân vân. refers to the sudden drop in the effective value of the voltage, and then suddenly returns to normal.
According to authoritative data EPRI( the American Academy of Electrical Sciences), more than 92% of power quality events are voltage sags and swells, and less than 8% of other power quality events. The International Association of Electrical and Electronic Engineers (IEEE) defines it as falling to 90 ĐẾN 10 per cent of the rating with a typical duration of 0.1~1 s.
The Reasons for Voltage SagThere are many causes of voltage sag, when short-circuit faults, lightning strikes, and large-scale motor start-up events in transmission and distribution systems, which may cause voltage sag. Vì thế, voltage sag can not be avoided.
-Weather reasons
-Accidental events
-Other faults
CoEpo DVR adopts power electronics technology, when the system voltage drops suddenly, the DVR can realize the fast regulation of the voltage, at the same time eliminate the voltage three-phase imbalance, and have the adjustment voltage deviation, ensure the seamless connection of the output voltage to the rated value, and protect the normal operation of the load.
Input Voltage: 208V/400V/480V/10KV，Or Customize Voltage Level;
Single capacity range: 30KVA~4000KVA;
Fast voltage sag correction, response time up to 2 bệnh đa xơ cứng;
Low energy consumption (less than 1%), high efficiency, small area;
Độ tin cậy cao;
Eliminate voltage three-phase imbalance at the same time;
Control voltage fluctuation, eliminate flicker;
Phase angle error correction;
Easy installation, no maintenance.
Excellent voltage regulation accuracy, single machine capacity.
DVR in series between the supply and the protected load will continuously monitor the input side supply voltage. Once it is found that the supply voltage deviates from the rated voltage level, DVR will produce a suitable compensation voltage injection system by an IGBT inverter system, which ensures that the output side (i.e., the load side) voltage is stable and that the protected load is not affected by voltage changes.
Grid voltage within limits: When the grid is supplying the load (in online mode), the inverter sleeps but remains in sync with the grid voltage for immediate action in case of grid disturbance.
Occurrence of voltage sag: When the power occurs in the power grid, the double reverse switch quickly shuts off, thus isolating the load from the power grid, from the inverter to the load power supply.
Voltage re-stabilized: DVR the double reverse switch on, the inverter circuit is closed, the load will be supplied by the power grid again, and the rectifier circuit re-charges the energy storage capacitor.
Fault safety bypass operation: In the case of DVR failure or maintenance, the load current will be automatically transferred to the fault safety bypass. That is, the current will be directly supplied to the load through the contactor or bypass switch connected in parallel to the thyristor.
CoEpo DVR Working principle of high voltage products of the dynamic voltage restorer
1. Độ tin cậy cao, designed for industrial load
Multi-stage protection, simple circuit, high reliability, maintenance-free.
2. High system efficiency and fast response speed
Efficiency up to 99.2%; the protection switching time is not more than 2 bệnh đa xơ cứng; single phase, two phase, three phase drops to 0% can be managed.
3. Superior rectifier performance, no harmonic injection
Adopt fourth-generation insulated gate bipolar transistor (IGBT) power device, and multiple protection technologies are used to ensure the absolute reliability of the equipment, advanced IGBT green rectifier technology, no harmonic injection pollution, and improve the power utilization.
4. All digital control technology based on DSP, high reliability
Using a 32-bit state-of-the-art digital signal processor, which enables DVR to achieve extremely high performance and reliability through advanced, flexible logic algorithms.
5. Advanced Parallel Expansion Function, Modular Design
Parallel expansion function increases the capacity of the DVR system and redundant backups, which improves the reliability of the power supply.
6. A multifunctional panel with graphics, TFT true color displays
DVR multifunctional panel is equipped with an 8-inch graphics TFT display. With a graphical display and interface-friendly menu operating system, users can easily browse input, output, load, and run parameters.
7. Total maintenance-free, low operating costs
Độ tin cậy cao, no breakable parts, minimal self-consumption, and 20 20-year design life of energy storage devices.
8. No cooling equipment required
Self-consumption is only 0.8% without a forced cooling heat dissipation system.
1. Through the protection of voltage sag, temporary rise, to prevent serious fault shutdown loss, to avoid waste of raw materials, and production equipment damage. Avoid using inferior electricity, reduce factory maintenance costs, and protect product quality.
2. Avoid accidents caused by data and control system disturbance caused by voltage sag.
3. Compared with the traditional online UPS system, the CoEpo DVR equipment uses only a fraction of its power consumption, which greatly saves users’ electricity. It saves users considerable cost of maintenance and replacement of batteries, at the same time, eliminates the problem of disposal of used batteries, and avoids pollution to the environment. The work efficiency is extremely high, the equipment itself does not have heat, does not need air conditioning, and so on heat dissipation cooling system, saving the air conditioning hardware investment and the usage fee.
4. Harmonic-free injection into the grid without the need for traditional UPS or additional filter equipment investment.
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