Modeling and Analysis of Synchronous Machines

Masoum, Mohammad A. S.; Fuchs, E.F.

doi:10.1016/b978-0-12-800782-2.00004-x

Cited by 2 publications

(5 citation statements)

References 57 publications

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“…Poor VFD output power quality is the cause of many electrical failures in ESP systems [11,[47][48][49]. Therefore, attention is paid to the quality of voltages and current delivered downhole to the ESP motor.…”

Section: Key Parameters To Characterize the Quality Of Power In Esp S...mentioning

confidence: 99%

“…However, newer IGBTs have been designed with a lower rise time (about 0.1 µs), which may be found in most new VFDs for ESP applications [48]. In calculating dv/dt, refer to NEMA Standard MG1 [49]. The rise time may be in enced by the switching characteristics of the VFD power switches (such as IGBTs MOSFETs) and other related components.…”

Section: Maximum Dv/dtmentioning

confidence: 99%

“…Some of th devices can still be found in installed ESP systems. However, newer IGBTs have been signed with a lower rise time (about 0.1 μs), which may be found in most new VFDs ESP applications [49].…”

Section: Maximum Dv/dtmentioning

confidence: 99%

“…As described in section 3, the harmonic frequen of a voltage or current are frequency components in the signal at an integer multipl the frequency of the fundamental component (baseband components), and compon that are the combination of switching and fundamental frequencies, called sidebands monics or inter-harmonics. THD is defined as [49]:…”

Section: Voltage and Current Total Harmonic Distortionmentioning

confidence: 99%

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

et al. 2023

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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.

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Section: Key Parameters To Characterize the Quality Of Power In Esp S...mentioning

confidence: 99%

Section: Maximum Dv/dtmentioning

confidence: 99%

Section: Maximum Dv/dtmentioning

confidence: 99%

Section: Voltage and Current Total Harmonic Distortionmentioning

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

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“…The majority of equipment can withstand unbalances of up to 2%, however, if they exceed 2%, the result can be motor and transformer overheating. This is caused by the current unbalance at the terminals fluctuating as a cube of the voltage unbalance [1], [2]. The type of connecting can either improve or make the voltage unbalance factor (VUF) worse.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Voltage Profiles, Unbalance Voltages and Phase Balance Optimization of Single-Phase Customer and Photovoltaic Connection at Real Low Voltage Feeder

Ostojić,

Bosović

2023

B&H Electrical Engineering

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Voltage unbalance is common issue encountered in low voltage distribution networks, caused by uneven allocation of single-phase customers among phases. This paper analyses part of real low voltage distribution network in Bosnia and Herzegovina. The impact of single-phase customers and single-phase connected micro photovoltaic power plants (MPPP-s) were analysed. To reduce unbalance and improve voltage profiles, Phase Balance Optimization toolbox in DIgSILENT PowerFactory software was performed in six scenarios with different distribution of customers and different percentage of penetration of MPPS-s. The aim was to find method with least number of changes in customer and photovoltaic phase connection that fits within defined limits of voltage variations and voltage unbalance of European standard for power quality (EN 50160). Conclusion is that MPPP-s cause voltage increases in the network, as well as an increase in voltage unbalance, but these effects can be mitigated by proper distribution of customer loads and MPPS-s among phases.

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Modeling and Analysis of Synchronous Machines

Cited by 2 publications

References 57 publications

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

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

Analysis of Voltage Profiles, Unbalance Voltages and Phase Balance Optimization of Single-Phase Customer and Photovoltaic Connection at Real Low Voltage Feeder

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