Load current control for three-phase power converter SVPWM with current-regulation

A single processor controls a three phase silicon controlled rectifier (SCR) power converter. An inexpensive, dual optoisolator interface to the power line provides noise rejection and an improved measure of the zero crossing. A dynamic digital phase-locked loop (PLL) algorithm implemented in an Intel 87C196KD-20 processor achieves frequency tracking, dynamically changing characteristics for improved performance. Dynamically modifying the PLL characteristics permits independent capture and locked dynamics. A feedforward method provides command tracking for improved response without loss of performance. This three-component design (processor, optoisolator, and SCR gate drivers) represents a minimal implementation with potential for closed loop voltage and current control. High speed input and output resources included on the 87C196KD processor make an efficient single-device implementation possible. The processor is less than 1% utilized allowing for additional functions to be added in the future. This system operates on both 50 Hz and 60 Hz power systems without modification or loss of performance.

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State Feedback Current Control of the Three-Phase Grid Connected Power Inverter for the Regenerative Loads

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.647.935 ◽

2013 ◽

Vol 647 ◽

pp. 935-938

Author(s):

Marian Gaiceanu ◽

Adriana Burlibasa ◽

Cristian Eni ◽

Mihaita Coman

Keyword(s):

Steady State ◽

Power Quality ◽

State Feedback ◽

Power Converters ◽

Power Converter ◽

Current Control ◽

Current Loop ◽

Three Phase ◽

Simulation Results

Grid-connected power converters are controlled by the current loop, the voltage being delivered by the grid. The proposed state feedback current control has three components: the state feedback, the forcing component to achieve the desired state x1 and the compensating feed forward of the perturbation. Moreover, the control of the power converter, through the external DC-link voltage loop, and internal current loop, assures zero steady state error, and power quality performances. In order to prove the quality of the proposed control, a regenerative load has been used, and the corresponding simulation results are provided.

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The Application of BP Algorithm in Electronic Load Current Control

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.846-847.185 ◽

2013 ◽

Vol 846-847 ◽

pp. 185-189

Author(s):

Gui Xiu Jiang ◽

Shu Jie

Keyword(s):

Control Method ◽

Sampling Frequency ◽

Current Control ◽

Bp Algorithm ◽

Load Current ◽

Hysteresis Current Control ◽

Three Phase ◽

Simulation Results ◽

The Difference ◽

Electronic Load

The current control method based on double hysteresis current control and space vector is taken, so that the current tracing control of three phase VSR can realized. The predictive current control based on BP algorithm is presented, and the drawback that there is beat during the control of SVPWM based on hysteresis can be made up, which has serious influence on the current tracing when the difference value changed violently. Without the rise of sampling frequency, the reference offset current of next time is predicted using of historical current. The simulation results show that the predictive current control based on BP algorithm is correct and valid. The deadbeat control of SVPWM based on hysteresis is realized, less harmonic current and better tracing are got.

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New Three-Phase Current Control Methods Using Quasi-Current-Error for AC Motor Drives

IEEJ Transactions on Industry Applications ◽

10.1541/ieejias.134.821 ◽

2014 ◽

Vol 134 (9) ◽

pp. 821-832 ◽

Cited By ~ 3

Author(s):

Shinji Shinnaka

Keyword(s):

Current Control ◽

Motor Drives ◽

Control Methods ◽

Phase Current ◽

Ac Motor ◽

Three Phase ◽

Ac Motor Drives ◽

Current Error

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Inductor Saturation Compensation in Three-Phase Three-Wire Voltage-Source Converters via Inverse System Dynamics-I

10.36227/techrxiv.12378371 ◽

2020 ◽

Author(s):

Ziya Özkan ◽

Ahmet Masum Hava

Keyword(s):

Dynamic Model ◽

Dynamic Performance ◽

Current Control ◽

Inverse System ◽

Voltage Source ◽

Voltage Source Converter ◽

Two Phase ◽

Inverse Dynamic ◽

Three Phase ◽

Steady State Current

In three-phase three-wire (3P3W) voltage-source converter (VSC) systems, utilization of filter inductors with deep saturation characteristics is often advantageous due to the improved size, cost, and efficiency. However, with the use of conventional synchronous frame current control (CSCC) methods, the inductor saturation results in significant dynamic performance loss and poor steady-state current waveform quality. This paper proposes an inverse dynamic model based compensation (IDMBC) method to overcome these performance issues. Accordingly, a review of inductor saturation and core materials is performed, and the motivation on the use of saturable inductors is clarified. Then, two-phase exact modelling of the 3P3W VSC control system is obtained and the drawbacks of CSCC have been demonstrated analytically. Based on the exact modelling, the inverse system dynamic model of the nonlinear system is obtained and employed such that the nonlinear plant is converted to a fictitious linear inductor system for linear current regulators to perform satisfactorily.

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Resonant BLDC Motor Drive System for Medical Applications

Current Signal Transduction Therapy ◽

10.2174/1574362414666191016153727 ◽

2019 ◽

Vol 14 ◽

Author(s):

C. Vidhya ◽

V. Ravikumar ◽

S. Muralidha

Keyword(s):

High Frequency ◽

Pulse Width Modulation ◽

Power Converter ◽

Low Power Consumption ◽

Motor Drive ◽

Medical Applications ◽

Bldc Motor ◽

Three Phase ◽

High Frequency Ac ◽

Motor Drive System

: The objective of this paper is to implement an ac link universal power converter controlled BLDC motor for medical applications. The ac link universal power converter is a soft switched high frequency ac link converter, created using the parallel combination of an inductor and a capacitor. The parallel ac link converter handle the ac voltages and currents with low reactive ratings at the link and offers improved power factor, low power consumption, more efficiency and less weight on comparison with the traditional dc link converter. Because of the high throughput, BLDC motors are preferred widely medical applications. A modulation technique called Space Vector Pulse Width Modulation (SVPWM) is used to generate the three phase power for the BLDC motors from the input DC supply. To validate the proposed system, simulations are performed in MATLAB – Simulink and an experimental prototype is constructed to supplement the simulation results.

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Model-Free Predictive Current Control for Three-Phase Power Converters With LCL Filter

2020 IEEE Energy Conversion Congress and Exposition (ECCE) ◽

10.1109/ecce44975.2020.9236083 ◽

2020 ◽

Author(s):

Xiang Liu ◽

Yongchang Zhang ◽

Haitao Yang ◽

Jose Rodriguez

Keyword(s):

Power Converters ◽

Current Control ◽

Lcl Filter ◽

Model Free ◽

Three Phase

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Attenuation of DC-Link Pulsation of a Four-Wire Inverter during Phase Unbalanced Current Operation

Applied Sciences ◽

10.3390/app11031322 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1322

Author(s):

Dariusz Zieliński ◽

Karol Fatyga

Keyword(s):

Energy Storage ◽

Control Algorithm ◽

Reactive Power ◽

Lithium Ion ◽

Power Converter ◽

Dual Active Bridge ◽

Three Phase ◽

Ion Storage ◽

Energy Store ◽

Phase Converter

This paper proposes a control algorithm for a hybrid power electronic AC/DC converter for prosumer applications operating under deep phase current asymmetry. The proposed system allows independent control of active and reactive power for each phase of the power converter without current pulsation on the DC link connected to an energy store. The system and its algorithm are based on a three-phase converter in four-wire topology (AC/DC 3p-4w) with two dual-active bridge (DC/DC) converters, interfaced with a supercapacitor and an energy storage. The control algorithm tests were carried out in a Hardware in the Loop environment. Obtained results indicate that operation with deep unbalances and powers of opposite signs in individual phases leads to current oscillations in the DC link. This phenomenon significantly limits energy storage utilization due to safety and durability reasons. The proposed algorithm significantly reduces the level of pulsation in the DC link which increases safety and reduces strain on lithium-ion storage technology, enabling their application in four-wire converter applications.

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