Performance evaluation of a transformerless multiphase electric submersible pump system

The Journal of Engineering

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[1] Department of Electrical Engineering, Alexandria University, Alexandria, Egypt;Department of Electrical Engineering, Alexandria University, Alexandria, Egypt;Electrical Department, Qatar University, Doha, Qatar;ECEN Department, Texas A&M University at Qatar, Doha, Qatar;

关键词: pumps;    variable speed drives;    overvoltage;    invertors;    asynchronous machines;    machine windings;    transformerless multiphase electric submersible pump system;    low-voltage variable-frequency drive;    step-up transformer;    overvoltage problems;    travelling wave phenomenon;    filter networks;    boost-inverter;    filter-less operation;    sinusoidal output voltage;    voltage boosting capability;    five-phase modular winding induction machine;   

DOI  :  10.1049/joe.2014.0148

来源: publisher

【 摘 要 】

Using of low-voltage variable-frequency drive followed by a step-up transformer is the most preferable way to feed an electrical submersible pump motor. The existence of long feeder between the motor and drive systems usually causes over-voltage problems because of the travelling wave phenomenon, which makes the employment of filter networks on the motor or inverter terminals mandatory. The so-called boost-inverter inherently can solve this problem with filter-less operation as it offers a direct sinusoidal output voltage. As boost inverters have voltage boosting capability, it can provide a transformer-less operation as well. This study investigates the performance of a five-phase modular winding induction machine fed from a boost-inverter through a long feeder. A simulation study using a 1000 Hp system and experimental investigation on a 1 Hp prototype machine are used to support the presented approach.

【 授权许可】

CC BY