VVR real-time dynamic voltage controller
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Product Description
Introduction to voltage sag
With the rapid development of the modern power industry and major changes in the power load structure of the system, the dependence of factory and office automation on electronic equipment has rapidly increased. For power users, voltage sags are becoming a major problem. The entire process of electricity generation to use spans a wide geographic area. Among them, the entire transmission system generally encounters accidents such as lightning, heavy rain, strong wind, construction, and personnel misoperations, causing voltage sags caused by short-circuit failures, and some are enough to affect To the normal operation of sensitive equipment.
At present, most of the voltage problems in the power grid are voltage sags/swells, and voltage sags/swells are common voltage problems. Abnormal increase in the effective value of the voltage will directly damage the equipment. The mains voltage sag, which can cause electrical equipment failures or shutdowns, has occurred more than 10 times more than the complete main grid outage. According to authoritative data from EPRI (American Electric Power Research Institute), more than 92% of power quality events are voltage sags and swells, and other power quality events account for less than 8%. Voltage sag has been determined by many international research institutions as the most common event in the power system. Therefore, it is particularly important to protect sensitive equipment from voltage sags (swells).
Introduction to VVR
VVR adopts power electronic technology. When the system voltage suddenly drops, VVR can realize rapid voltage regulation, eliminate voltage three-phase imbalance, and has regulation voltage deviation, ensuring seamless connection of output voltage to the rated value and protecting normal load run.
Advantages of VVR
High reliability, specially designed for industrial loads
High system efficiency and fast response speed
Superior rectifier performance, no harmonic injection
DSP-based full digital control technology, high reliability
Advanced parallel expansion function, modular design
Multi-function panel with graphic TFT true color display
Completely maintenance-free, low operating costs
No cooling equipment required
Compact structure design, small footprint
overall benefit
Through the protection of voltage sags and swells, it can prevent serious failures and shutdown losses, and avoid waste of raw materials and damage to production equipment. Avoid using low-quality power for equipment, reduce plant maintenance costs, and protect product quality.
Avoid accidents caused by data and control system disturbances caused by voltage sags.
Compared with traditional online UPS systems, the self-consumption of VVR equipment is only one tenth of that, which greatly saves users' electricity bills. It saves the user considerable maintenance and battery replacement costs, and at the same time eliminates the disposal of used batteries to avoid pollution to the environment. The work efficiency is extremely high, the equipment itself does not generate heat, and there is no need for heat dissipation and cooling systems such as air conditioners, which saves the hardware investment and usage fees of the air conditioner.
No harmonics are injected into the grid, and no additional filtering equipment investment required by traditional UPS.
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