AVC-RTS
Product features
Features:
1, 0-100% residual voltage to 100% rated voltage perfect compensation
2. Strong over-voltage regulation ability, rated voltage can be set between -15% and +15%
3. Quick switching time is less than 100us and full response time is less than 5ms
4. High reliability
5. No maintenance, no duty
Product application effect
Avc-rts output side governing effect diagram of three-phase grid phase voltage falling from 220V to 0V
When the network voltage temporarily drops to 0V, it can quickly stabilize the voltage at the set value of 220V after compensation by avc-rts of huasheng
AVC-RTS output side control effect diagram of partial voltage sag of power grid
When the partial voltage sag of the grid occurs, after compensation by avc-rts of huasheng, the voltage can be stabilized at 220V quickly.
What is a voltage sag?
IEEE standards and national standards for the voltage sag and short supply interruption of power quality (GB/T30137-2013) provides for voltage sag definition: voltage sag refers to a certain point in the power system of power frequency voltage RMS temporarily reduced up to 10% - 90% of the rated voltage (that is, the amplitude of 0.1 to 0.9 p.u.), and lasts 10 ms - 1 min, during this period the system frequency is still the nominal value, and then returned to normal phenomenon. The voltage sag is measured as the percentage of the remaining voltage. Short interruption refers to the instantaneous reduction of the one-phase or multiphase voltage below 0.1p.u. and the duration is 10ms-1min.
Cause of voltage sag
Cause of voltage sag
Voltage sag is usually caused by the failure of the power grid, substation facilities or sudden large changes in load. During the long distance transmission of electric energy, it is inevitable to encounter many situations such as power system failure, lightning strike, large motor start, capacitor switching and other events in the transmission and distribution system.
1. Natural causes: lightning strikes, lightning, heavy rain, strong winds and snow.
2. Power system reasons: short circuit fault, large motor start, line switching, transformer and capacitor switching, power distribution device fault induction motor (high power) start, etc.;
3. Unpredictable and accidental events: traffic accidents, transmission line damage caused by construction, human error and some small animals entering the distribution room, etc.
Hazard of voltage sag
The harm caused by voltage sag is related to industry nature and load. The following table shows the voltage sensitivity of some devices:
Impact on production: affect the normal operation of equipment, product quality decline; Damage of precision products and scrap of raw materials; Automatic device stop or misoperation, frequency conversion governor stop; Causes contactor tripping or low voltage protection to start, which causes motor and elevator to stop, and causes high temperature light source (iodine tungsten lamp) to go out, etc.; A disorderly start that disrupts or interrupts the production line and falls behind is much more damaging and damaging than a planned orderly recovery after a power outage, delaying delivery times.
Damage to electrical equipment: computer system failure, data loss, motor shutdown on the production line, inverter voltage loss protection action, programmable logic controller (PLC) failure, etc. Computer controlled brain surgery, cardiovascular surgery, eye surgery and other operations in the hospital, voltage drop caused by the equipment can not work properly, causing serious consequences; Shorten or even damage the life of electrical equipment.
Impact on company finances: reduce plant efficiency by 1-2%; Reduce the utilization rate of labor hours; Low return on equipment investment; Increase maintenance costs; Increase additional spares expenditure.
Application industry
At present, the voltage sag problem has caused several billion yuan of annual economic loss to the domestic petrochemical, semiconductor, paper, chemical, pharmaceutical, textile and other industries, and the indirect loss is incalculable. Huasheng avc-rts provides the ultimate sag solution for voltage sag sensitive industries, escorting the safe and stable operation of equipment.
