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the solution of voltage sag,swell,short-term interruption
LDVR0.4-300-A
Floor standing
Sanhe
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LDVR series Low voltage dynamic voltage restorer adopts high-power power electronic technology and digital processing technology.The generalized second-order complex vector algorithm is used to quickly detect the voltage transient process of the power system. When the voltage has a sag, swell, short-term interruption, the μs-level response will be used in the isolation transformer power supply. At the same time, the energy stored in the supercapacitor will feed back to the primary load to ensure that the production is proceeded.
LDVR adopts intelligent control mode, and flexibly sets the control logic according to the actual working conditions .It is widely used in petrochemicals, electronics, semiconductors, precision manufacturing, automobiles, pharmaceutical, hospital, metallurgy, and mechanical processing industries .
Standard
GB/T 18481 "Power Quality Temporary Overvoltage and Transient Overvoltage"
GB/T 30137 "Power Quality Voltage Dips and Short
Interruptions"
DL/T 1194 "Power Quality Terminology"
Model Guid
Model | Voltage | Capacity | Compensation |
LDVR0.4-300-A | 400V | 300kVA | AC Parallel |
LDVR0.6-800-A | 690V | 800kVA | AC Parallel |
LDVR0.4-030-D | 400V | 30kVA | DC Parallel |
Dynamic Voltage Restorer-Parallel&Series Compensation
DVR type | Voltage Restore Work Range | Price | Application(Load) | Remark |
AC parallel compensation | 0～0.8p.u. and 1.2p.u.～1.8p.u. | middle | Precision equipment with large voltage fluctuations |
Parallel Compensation(Switch Power Supply) |
DC parallel compensation | 0.2～1.8p.u. | low | DC bus bar, VFD etc. | |
AC series Parallel compensation | 0.6p.u.～1.4p.u. | middle | Heavy-duty equipment with frequent overloads |
Series Compensation (Voltage Superposition) |
Series ¶llel comprehensive cross-energy acquisition | 0～1.8p.u. | high | compensating in 2 busbars, sharing a set of super capacitor modules/cabinet | |
AC Series& Parallel compensation | 0～1.8p.u. | high | Combination of communication parallel complement and series complement,Wide range of voltage compensation |
Grid voltage normal |
Easy maintenance, modular strcture design, easy power expansion
Meet N+X requirements and improve redundancy
Cales connection:top in and top out, side in and top out
Technical data
Basic Parameter | Rated Voltage | 208V | 400V | 690V |
Rated Capacity | 10-2000kVA | |||
Compensation Range | 0%-130% | |||
Compensation Time | 0-10s(customized) | |||
Grid Side | Frequency | 50Hz | ||
Efficiency | 99.2% | |||
Overload Capacity | over load 150%，;ast 60s；over load 500%，last 1s | |||
Wiring | 3P3W/3P4W | |||
LDVR Output | Overcompenstion Voltage protection | ok | ||
Frequency | 50Hz | |||
Full Response | <2ms | |||
Accuracy | <1% | |||
Storage | Life | 15 years(25℃) | ||
Cycle times | >1000000 | |||
Principle - system composition & control method
Each phase is independent, and the amplitude and phase of the output voltage are controlled separately, which is convenient for control.
Has the advantage of fast response and simple control
Provides more precise control results
Instantaneously and accurately detect the amplitude and phase of the three-phase voltage
Drop, undervoltage compensation strategy, with good tracking performance, can adapt to the rapid change of compensation target
Overvoltage compensation strategy, the output voltage vector is perpendicular to the load current
The voltage fully recovers to the load voltage level before the voltage dip
Main material
 | Static Switch When the power grid is normal, the power supply is turned on, and the load and power system are quickly isolated when the voltage fluctuates to prevent energy backflow |
 | Bidirection Converter The core device adopts high-power power electronic technology, precise control, high-speed response, and realizes rectification charging and inverter discharging functions |
 | DSP High-speed sampling analysis, instant processing, guaranteed switching time |
 | Isolation Transformer Electromagnetically isolate the AC and DC busbars to ensure the continuity of the TN-S system and prevent neutral point drift |
 | Energy Storage Unit High power density with supercapacitors, especially suitable for dynamic voltage stabilization |
 | IGBT The heart of the product has the advantages of high speed, good stability, high withstand voltage and high current |
Application
Semiconductor: Factory exhaust system, PCW process cooling water system, lithography machine, ion implanter, control system, etc.
Fiber: Textile equipment, condensation equipment, tension control equipment, winding machines, etc.
Automobile: Welding robots, painting equipment, cleaning machines, etc.
Pharmaceutical: Freeze dryer, concentrator, etc.
Petrochemical: Inverter, motor, etc.
LDVR series Low voltage dynamic voltage restorer adopts high-power power electronic technology and digital processing technology.The generalized second-order complex vector algorithm is used to quickly detect the voltage transient process of the power system. When the voltage has a sag, swell, short-term interruption, the μs-level response will be used in the isolation transformer power supply. At the same time, the energy stored in the supercapacitor will feed back to the primary load to ensure that the production is proceeded.
LDVR adopts intelligent control mode, and flexibly sets the control logic according to the actual working conditions .It is widely used in petrochemicals, electronics, semiconductors, precision manufacturing, automobiles, pharmaceutical, hospital, metallurgy, and mechanical processing industries .
Standard
GB/T 18481 "Power Quality Temporary Overvoltage and Transient Overvoltage"
GB/T 30137 "Power Quality Voltage Dips and Short
Interruptions"
DL/T 1194 "Power Quality Terminology"
Model Guid
Model | Voltage | Capacity | Compensation |
LDVR0.4-300-A | 400V | 300kVA | AC Parallel |
LDVR0.6-800-A | 690V | 800kVA | AC Parallel |
LDVR0.4-030-D | 400V | 30kVA | DC Parallel |
Dynamic Voltage Restorer-Parallel&Series Compensation
DVR type | Voltage Restore Work Range | Price | Application(Load) | Remark |
AC parallel compensation | 0～0.8p.u. and 1.2p.u.～1.8p.u. | middle | Precision equipment with large voltage fluctuations |
Parallel Compensation(Switch Power Supply) |
DC parallel compensation | 0.2～1.8p.u. | low | DC bus bar, VFD etc. | |
AC series Parallel compensation | 0.6p.u.～1.4p.u. | middle | Heavy-duty equipment with frequent overloads |
Series Compensation (Voltage Superposition) |
Series ¶llel comprehensive cross-energy acquisition | 0～1.8p.u. | high | compensating in 2 busbars, sharing a set of super capacitor modules/cabinet | |
AC Series& Parallel compensation | 0～1.8p.u. | high | Combination of communication parallel complement and series complement,Wide range of voltage compensation |
Grid voltage normal |
Easy maintenance, modular strcture design, easy power expansion
Meet N+X requirements and improve redundancy
Cales connection:top in and top out, side in and top out
Technical data
Basic Parameter | Rated Voltage | 208V | 400V | 690V |
Rated Capacity | 10-2000kVA | |||
Compensation Range | 0%-130% | |||
Compensation Time | 0-10s(customized) | |||
Grid Side | Frequency | 50Hz | ||
Efficiency | 99.2% | |||
Overload Capacity | over load 150%，;ast 60s；over load 500%，last 1s | |||
Wiring | 3P3W/3P4W | |||
LDVR Output | Overcompenstion Voltage protection | ok | ||
Frequency | 50Hz | |||
Full Response | <2ms | |||
Accuracy | <1% | |||
Storage | Life | 15 years(25℃) | ||
Cycle times | >1000000 | |||
Principle - system composition & control method
Each phase is independent, and the amplitude and phase of the output voltage are controlled separately, which is convenient for control.
Has the advantage of fast response and simple control
Provides more precise control results
Instantaneously and accurately detect the amplitude and phase of the three-phase voltage
Drop, undervoltage compensation strategy, with good tracking performance, can adapt to the rapid change of compensation target
Overvoltage compensation strategy, the output voltage vector is perpendicular to the load current
The voltage fully recovers to the load voltage level before the voltage dip
Main material
| Static Switch When the power grid is normal, the power supply is turned on, and the load and power system are quickly isolated when the voltage fluctuates to prevent energy backflow |
| Bidirection Converter The core device adopts high-power power electronic technology, precise control, high-speed response, and realizes rectification charging and inverter discharging functions |
| DSP High-speed sampling analysis, instant processing, guaranteed switching time |
| Isolation Transformer Electromagnetically isolate the AC and DC busbars to ensure the continuity of the TN-S system and prevent neutral point drift |
| Energy Storage Unit High power density with supercapacitors, especially suitable for dynamic voltage stabilization |
| IGBT The heart of the product has the advantages of high speed, good stability, high withstand voltage and high current |
Application
Semiconductor: Factory exhaust system, PCW process cooling water system, lithography machine, ion implanter, control system, etc.
Fiber: Textile equipment, condensation equipment, tension control equipment, winding machines, etc.
Automobile: Welding robots, painting equipment, cleaning machines, etc.
Pharmaceutical: Freeze dryer, concentrator, etc.
Petrochemical: Inverter, motor, etc.
