A Power Loss Ride Through Control Strategy for Variable Speed Drives based on the Modular Multilevel Matrix Converter

The power loss analysis of matrix converter based on RB-IGBT is discussed in this paper. The on-state performance and switching process of RB-IGBT are tested; the on-state curve is obtained by the mathematical fit of the experimental data; On the basis, a method of power loss calculation for matrix converter under the input line-to-line voltage control strategy and four-step commutation strategy is investigated; Finally, the simulation result obtained by MATLAB/Simulink verifies the correctness and validity of the proposed method.

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The Variable Speed Direct Drive Permanent Magnet Synchronous Wind Power System Used on Matrix Converter

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.7569 ◽

2011 ◽

Vol 383-390 ◽

pp. 7569-7575

Author(s):

Bo Yang ◽

Guang Zeng ◽

Yan Ru Zhong

Keyword(s):

Wind Speed ◽

Power System ◽

Permanent Magnet ◽

Wind Power ◽

Control Strategy ◽

Matrix Converter ◽

Variable Speed ◽

Direct Drive ◽

Capture Range ◽

Wind Power System

A voltage control strategy of the converter inverter-stage is proposed for the variable speed direct drive wind power system which consists with the two stage matrix converter (TSMC) and the permanent magnet synchronous generator (PMSG). In this control strategy, the inverter-stage voltage is controlled by the adjusted of inverter-stage modulation ratio M. For two cases, which is strong wind speed and weak wind speed, the ways that is decrease M and increase M are used and obtain the wide wind speed capture range. The resulted of simulation and experiment show that this way can make the voltage stabled. The performance of the converter implement this control strategy is still as same as the dual PWM converter and the wind power system preserve the feature of the wide wind speed capture range. So this way is effective and feasible to some extent.

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The Harmonics Effect of Variable Speed Drives on Generator Performance

Current Journal: International Journal Applied Technology Research ◽

10.35313/ijatr.v1i2.34 ◽

2020 ◽

Vol 1 (2) ◽

pp. 112-119

Author(s):

Ignatius Riyadi Mardiyanto

Keyword(s):

Power Plant ◽

Power Loss ◽

Power Plants ◽

Power Transfer ◽

Variable Speed ◽

Synchronous Generators ◽

Variable Speed Drives ◽

Variable Speed Drive ◽

Small Capacity ◽

Generator Performance

Large motors often burden synchronous generators as power plants in factories. This motor is commonly using to regulate rotation using Variable Speed Drive (VSD). From the load side, VSD, as a regulator of motor rotation, can reduce power loss. On the generator side as a power plant, this load with VSD affects the waveform of the generator. The experiments on a small capacity generator (6 kVA) with a VSD as regulating the motor rotation with a load of about 1.1 kW shows effectiveness power transfer is about 40.7% with VSD, and without VSD, efficiency is approximately 39.6%. The motor losses by installing VSD interpreted as transferring losses to the generator with savings is about 1 %. The experiments also showed that generator performance decreases when loaded with VSD at around 6%, and a generator temperature increases at 20 0C higher than without VSD.

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