Even-order harmonics are current and voltage components at even multiples of the fundamental frequency — the 2nd, 4th, 6th and higher orders — that appear as asymmetric distortion in a three-phase power system. They behave differently from the familiar 3rd, 5th and 7th odd harmonics: balanced six-pulse rectifiers do not generate them, but asymmetry does. Half-controlled bridges, DC-off...
Poor power quality rarely appears as its own line on an electricity bill, but it can raise the charges a facility already pays by increasing current, losses and power-factor or demand penalties. When a bill climbs the tariff is blamed first — yet low power factor, harmonic distortion and voltage imbalance make a plant draw more current than the useful work it produces requires. This article ...
Harmonics are extra currents and voltages at integer multiples of the supply frequency that non-linear loads draw on top of the fundamental sine wave. Their effect is costly: transformers, motors and neutral conductors overheat, relays mis-trip, and equipment life shortens even below rated load. This guide covers measurement at the point of common coupling (PCC) and how to compare the main mitigat...
Power Factor and Reactive Power: The Hidden Cost on Your Electricity Bill Your electricity bill may be higher than it needs to be — not because you use more energy, but because of how you use it. The culprit is power factor, and it's one of the most overlooked opportunities in energy management. Active, Reactive and Apparent Power To understand power factor...
YT Electric (Shanghai Yingtong Electric Co., Ltd) is a Shanghai-headquartered manufacturer of power quality equipment — active harmonic filters (AHF), static var generators (SVG and ASVG), hybrid reactive power compensation, medium-voltage STATCOMs and energy storage systems — serving industrial plants, data centres, commercial buildings, hospitals, rail and renewable-energy projects. ...
When a PV plant reaches MW scale, inverter control stops being the same thing as grid code compliance. Compliance is judged at the point of common coupling (PCC), where the utility measures voltage and current quality — not at the inverter terminals. A plant with well-behaved inverters can still fail its connection test for that reason, and a medium-voltage STATCOM is usually the device that...
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