Bad Power Quality arise from power system's interaction with power surge and harmonic distortion. If a power system is susceptible at a point, possibilities of power quality tripping, resonance, and cmv failures, are limitless and are as dynamic as the fluctuations in power system impedance along with its load demands and harmonic distortions.
An electrical power system at the threshold of a resonance condition is as like a stormy sea, unpredictable, strikes at any moment causing vast damages in plant and machineries, and passes out as fast as it arrives. Fortunately, power quality resonance conditions can be avoided, if diagnosed appropriately, and a stable and improved quality of power at the susceptible point of the electrical power system, could be ensured.
With Encon, you are 100% certain about the success of your plant's total power quality mitigation project. Followings are examples for few Power quality problems those we resolve routinely by appropriately tuning our harmonic filters. Power quality resonance and common mode voltage (cmv) problem are unique, and we frequently encounter fresh problem with new challenges and difficulties from industries for which you can rely on Encon tuned harmonic filter solutions and it delivers.
Voltage fluctuation/ sag tripping, equipment failure, and Software corruption: Solves equipment tripping, its consequential damages, and failure, due to momentary voltage fluctuations/ sags, which happen due to power system resonance that originates either from the external grid/utility or the internal power system. Heavy and steep voltage fluctuations/ sags in association with its resulting earth fault, could even trip at the UPS output supplied equipment like data center servers, process instruments and supervisory control systems. Encon tuned harmonic filters, working as like an electrical fly wheel with appropriate storage energy, locks-on to those momentary voltage fluctuations/ sags, and prevents sensitive and continuous process equipment and solar photovoltaic power modules from tripping due to the tripping of its associated drives and/or controls like vfd/dc drives, solar inverters, HMI etc. If the software with the PLC/SCADA/IPC gets corrupted after a momentary voltage fluctuations/sags, the system reboots or hangs. Sometimes it works after a simple reset/reboot. But at times the software is required to be reloaded and/or reconfigured.
Sudden Spurt in Noise & Vibrations in Bus Bars and Power Transformers, and Large Motor Failures: Solves incidents of sudden spurt in bus bar noise & vibrations due to power quality resonance. The bus bars overheat visibly red hot, vibrate audibly loud loosening its nuts & bolts and wear-out the affected bus bar plates. Prevents sudden flash over involving bus bars and/or with its earthing path due to power quality resonance and cmv issues. It causes pitting alone the bus bars, could flash/blast connected switchgears, and bus bar edges could blast out flames, causing bullet like holes at panel covers. Avoids sudden spurt in transformer noise & vibrations due to PQ resonance. It could cause transformer HT winding insulation failures- burn/ flash/ blast/ winding-dislodge, burn/flash at OLTC/ OFTC terminals, and even burn/blacken the sturdy transformer LT winding insulation, as shown in caption picture. Eliminates sudden spurt in HT Circuit Breaker noise & vibrations due to power quality harmonic resonance. Eliminates sudden electrical stress on large motor and prevents its winding insulation failure/burning.
Failures at Grid and HT Switchyards: Solves electrical flash/blast involving Disc-insulators, Coupling-Capacitors (for hot line telephone communications), Lightning Arrestors, CTs, PTs, and Metering Kiosk Isolators/Switches.
HT Capacitor and inductor/reactor failures: Solves incidents of HT capacitor bulging/blasting and HT inductor burning/blasting due to power system series harmonic resonance.
HT Cable insulation puncture: Solves incidents of sudden HT cable insulation puncture which happens due to power quality resonance.
Power plant Tripping/Blackout, damages, and failures: Solves power plant tripping/black-out issues, due to power quality harmonics resonance, that causes protective relay tripping due to a combination of earth faults (EF), instantaneous non-directional over current (NOC) fault, higher Negative phase sequence currents (NPS), under voltage (UV), or differential fault at the alternator/ transformer. Prevents excessive stress on the power plant equipment due to resonance that could damage turbine/gear-box/bearing lining. Eliminates flash/blast in rotating-diodes at the alternator exciter circuit, as shown in caption picture.