Rightsizing Generators Through Harmonic Mitigation Realizes Energy, Emissions, and Infrastructure Reductions

Hoevenaars, A. H.; McGraw, M.G.; Alexander, J.

doi:10.1109/tia.2016.2603143

Cited by 4 publications

(3 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, it is not eliminated by a sine-filter, which is usually designed to cancel phase-to-phase harmonics only. A common-mode quantity is mathematically expressed as shown in (17):…”

Section: Common-mode Voltage Harmonicsmentioning

confidence: 99%

“…Therefore, these issues must be addressed promptly to guarantee maximum performance and safety in the workplace. VFD voltage harmonics result from the modulation process utilized for controlling the power switches [16,17]. Figure 3 illustrates ESP systems' common root cause failures resulting from poor power quality related to VFDs, including high-voltage stresses, repetitive voltage transients, reflected waves, common-mode harmonics, arcing currents, bearing currents, and pulsating torques [16].…”

mentioning

confidence: 99%

“…They create high-voltage stresses superposed to the regular system voltage along the cable and at the motor terminals. As a result, they can threaten the equipment insulation in a very short time [17]. It is crucial to take necessary precautions to minimize the voltage and current harmonics generated by VFD topologies, as they combine in the machine's air gap, producing oscillating torque components, some of which may have high magnitudes [18].…”

mentioning

confidence: 99%

See 2 more Smart Citations

A Power Quality Assessment of Electric Submersible Pumps Fed by Variable Frequency Drives under Normal and Failure Modes

et al. 2023

View full text Add to dashboard Cite

This paper proposed a simplified modeling approach for a power quality (PQ) assessment of Electric Submersible Pumps (ESP) systems supplied by the two-level, the neutral-point-clamped three-level, and the cascaded H-bridge (CHB) multilevel inverter VFD topologies. The VFD switching function models and their analytical expressions are proposed to understand how they can create high-frequency components that might excite the resonance mode in a transmission cable or a rotating shaft system. Voltage, current, and motor airgap torque harmonics induced by each VFD topology in a balanced operation mode are derived and correlated to the PWM carrier and motor operating frequencies. The motor airgap harmonics are calculated based on Concordia’s transformation of voltages and currents in αβ-plan. These harmonic components are represented in the form of Campbell diagrams. An analysis of harmonics under unbalanced conditions was also conducted in a CHB VFD topology-powered ESP system with failed and bypassed cells. The investigated modulation technique is a neutral-shift PWM method that enables the system to operate balanced line-line voltages even if the line-neutral voltages are unbalanced. The effects of modifying the electrical spectrum using the neutral-shift PWM method on electrical and mechanical spectra are analyzed. The results of the Matlab/Simulink-based simulation show that the proposed full ESP system model is highly accurate in both normal and failure modes. The results are consistent with theoretical predictions and are graphically shown in the time and frequency domains for easy analysis. Hybrid experimental–numerical results on a reduced-scale laboratory setup are also discussed to confirm the correctness of the suggested developments.

show abstract

“…Also, it is not eliminated by a sine-filter, which is usually designed to cancel phase-to-phase harmonics only. A common-mode quantity is mathematically expressed as shown in (17):…”

Section: Common-mode Voltage Harmonicsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation