Unified Power Quality Compensator
Solving high and low voltage issues
The UPQC device can effectively deal with high and low voltage problems in Taiwan. It can play an important role in the common line voltage fluctuation scenarios in rural power grids to avoid damage to electrical equipment caused by excessively high or low voltages.
Automatically stabilize output voltage
The device has a fully automated control function that detects grid voltage data in real time. After comparing it with the set output voltage, it flexibly controls the compensation voltage to ensure stable output voltage and the output voltage accuracy can reach ≤±3%.
Unified Power Quality Compensator
Solving high and low voltage issues
The UPQC device can effectively deal with high and low voltage problems in Taiwan. It can play an important role in the common line voltage fluctuation scenarios in rural power grids to avoid damage to electrical equipment caused by excessively high or low voltages.
Automatically stabilize output voltage
The device has a fully automated control function that detects grid voltage data in real time. After comparing it with the set output voltage, it flexibly controls the compensation voltage to ensure stable output voltage and the output voltage accuracy can reach ≤±3%.
Product Composition
How it works:
The UPQC is connected in series between the distribution transformer and the JP cabinet through the coupling transformer system side. It is fully automated and controlled. It detects the grid voltage data in real time and compares it with the set output voltage. The voltage that needs to be compensated is flexibly controlled through the converter part, and the output voltage is flexibly set. The inverter output voltage is coupled to the system through the coupling transformer, that is, only the difference part needs to be compensated to achieve the minimum compensation power.
Product Features
The system has high efficiency and fast response: it can continuously compensate for three-phase voltage, the response time is ≤5ms, and the overall efficiency reaches 98%.
High reliability: multi-level protection, simple circuit, high reliability, and low maintenance requirements; product switching frequency >100kHz, small output ripple current, better management effect, lower loss, and longer product life.
Modular design: Modular design makes maintenance easy, effectively reducing the workload of operation and maintenance personnel and reducing operation and maintenance costs.
Special process treatment: The module adopts advanced potting technology inside, with high protection level; more suitable for harsh environments.
Independent design: Use outdoor independent installation to facilitate on-site construction.
Multifunctional design: It can reduce the operation and maintenance workload (no need to adjust the transformer), stepless voltage regulation, reactive power compensation, optional harmonic control, and optional three-phase unbalance.
Application Scope
Seasonal load variation distribution area
In power distribution areas with obvious seasonal load changes, such as tourist attractions and agricultural production areas, the load peaks and valleys vary greatly, resulting in severe voltage fluctuations. UPQC can detect and adjust voltage in real time to ensure stable power supply.
Small hydropower access to distribution area
The connection of small hydropower will cause the grid voltage to fluctuate due to the instability of hydropower output. UPQC can effectively deal with this kind of fluctuation, ensure voltage quality and improve power supply reliability.
Long distance power supply and distribution area
Long-distance power supply lines have large resistance and high voltage loss, and the terminal voltage is prone to deviation. UPQC can perform stepless voltage adjustment, compensate for voltage differences, and ensure that end-user voltage is qualified.
Photovoltaic new energy access to power distribution area
Photovoltaic new energy power generation is affected by factors such as light, and the power output is unstable, which will cause voltage fluctuations. UPQC can flexibly control the compensation voltage and stabilize the voltage in the station area.
Data Sheet
| Electrical Parameters | |
| Wiring method | Three-phase four-wire |
| Input voltage | AC240~460V |
| Operating frequency | 50Hz±5% |
| Product specifications | 100kVA, 160kVA, 200kVA, 320kVA, 400kVA |
| Noise | ＜65dB |
| Technical Features | |
| Switching devices | IGBT |
| Heat dissipation methods | Intelligent air cooling |
| Heat dissipation control | Adaptive fan speed adjustment |
| Protection functions | Fault bypass, overcurrent, overheat, and overvoltage protection |
| Product Performance | |
| Voltage resolution accuracy | ≤±1% |
| Overall efficiency | ＞98.5% |
| Full response time | ＜5ms |
| Output voltage adjustment range | 100kVA: ±20%, 160kVA: ±20%, 200kVA: ±15%, 320kVA: ±10%, 400kVA: ±8% ; Other pressure regulation ranges can be customized. |
| Display Interface | |
| Display screen | APP/Remote Control |
| Language | Chinese, English, customizable language |
| Battery display | Parameter control, system time log, voltage event log, event recording and data recording |
| Communication interface and protocol type | RS485, Modbus protocol; 4G/WiFi |
| Environmental Conditions | |
| Operating temperature | -25℃~+45℃ |
| Relative humidity | ≤95%, no condensation |
| Altitude | ＜2000m |
| Others | |
| Protection level | IP44, other ratings can be customized. |
| Installation method | Outdoor single pole/ground pole/H-pole |
Q&A
What are the challenges facing new power systems?
The problem of high and low voltages is prominent. Low voltage causes electrical equipment to fail to function normally and increases losses. High voltage endangers equipment safety. According to GB/T12325-2008 "Permissible Deviation of Power Supply for Power Quality" and "Power Supply Business Rules", the user voltage quality standard stipulates that the allowable deviation of three-phase power supply voltage of 20kV and below is ±7% of the nominal voltage of the system.
The higher the photovoltaic penetration rate, the higher the probability that the terminal voltage will exceed the limit!
The distribution line is too long, causing low voltage at the end!
The access of photovoltaics causes the low-voltage power supply voltage to be high and low as the load changes. It is a common phenomenon that the high voltage is 260V and the low voltage is 160V.
UPQC has become a rigid requirement, and high and low voltage issues involve power grid assessment.
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