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The paper presents a comprehensive Power Quality (PQ) solution to improve grid current harmonics and light intensity flickers in large scale LED lighting networks. Low cost and low power LED lamps exhibit current harmonic contents due to their nonlinear characteristics. A large scale lighting network requires tens to hundreds LED lamps installation, the resultant harmonic currents pollute the grid...
Unified power quality conditioner (UPQC) is a custom power device which is used intended for mitigation of voltage and current associated power quality problems in power distribution system. The considered topology to take a reduced dc-link voltage which enables the UPQC deprived of conceding its compensation capability. Active power filter mainly classified based on converter used i.e. constructed...
The traditional unified power quality controller (UPQC) topology based on modular cascade structure usually requires line transformer to effectively isolate the DC bus of each subunit when used in high voltage applications. The line transformer may bring various problems such as increased cost, magnetic saturation, surge current, phase shift and so on. In this paper, a new type of UPQC based on DC...
The unified power quality conditioner (UPQC) is a power conditioning device, which is a integration of back to back connected shunt active power filter (APF) and series APF to a common DC link voltage. For improvement of power quality (PQ) problems in a three-phase four-wire distribution system, two topologies are proposed in this paper. A comparative analysis of these topologies along with the most...
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