An improved algorithm for direct computation of optimal voltage and frequency for induction motors

Sruthi, M.P.; Nagamani, C.; Ilango, G. Saravana

doi:10.1016/j.jestch.2017.11.007

Cited by 14 publications

(9 citation statements)

References 17 publications

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“…Many control schemes were presented to regulate the frequency and voltage of SEIG; for example, an analog control scheme was proposed in [12], digital signal processor (DSP) based ELCs in [34,35], the current control scheme in [15], a feedforward control scheme for ELC in [25,36,37], and P, PI, and PID based control schemes in [38][39][40][41][42]. For MHPPs using asynchronous generators, a PI-based frequency and voltage control technique is proposed in [31,43,44], PI-based power control technique is proposed in [30,33], deadbeat control schemes in [45], PLL based integrated ELC in [46][47][48] and optimization-based control methods in [49][50][51]. Control schemes for SG were also proposed in the literature.…”

Section: Voltage and Frequency Control Of Standalone Mhppmentioning

confidence: 99%

Control Methods for Standalone and Grid Connected Micro-Hydro Power Plants With Synthetic Inertia Frequency Support: A Comprehensive Review

et al. 2020

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The penetration of renewable energy sources on a large scale in conventional electric networks increases exponentially for environmental preservation. However, the increase in RESs leads to some technical problems that include (a) fluctuations in power production, (b) less or no generation units for power balancing, (c) reduced inertia due to RESs decoupling from the conventional grid using converters. Micro-hydro power plants (MHPPs) are emerging as a mature balancing technology and a great alternative to large hydropower plants as they encounter population displacement and many environmental problems. Modern pump storage MHPPs uses a power converter between the grid and machine to control the consumption of power during pumping mode. This power electronic interface loses the ability of the rotating mass of the machine to contribute to the grid inertia by making it independent of the grid frequency. This problem is solved through the control of power converters in such a way that the inertia effect is synthesized termed as synthetic inertia. MHPPs can also be operated in a standalone mode where they are not connected to the grid. This paper reviews control schemes applied in literature for the frequency, voltage, and inertia control, in both the grid-connected and standalone modes. This study starts with the standalone MHPPs, covering the literature review and control structure for voltage and frequency control of standalone MHPPs. Then it presents a detailed operation, control principle, synthetic inertia concepts, and architecture of grid-connected MHPPs. The mathematical formulation of the grid, permanent magnet synchronous generator, synthetic inertia inclusion, and control structures, including direct torque control, virtual synchronous machine, and model predictive control, is also presented. Finally, the paper presents the concluding remarks with the comparative analysis of various control structures to include synthetic inertia, its suitability, and future scope for MHPPs.

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Section: Voltage and Frequency Control Of Standalone Mhppmentioning

confidence: 99%

Control Methods for Standalone and Grid Connected Micro-Hydro Power Plants With Synthetic Inertia Frequency Support: A Comprehensive Review

et al. 2020

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“…The optimal frequency and voltage for the motor found by some studies [18], [20] offer simulation models based on the complicated mathematical calculations and elaborate the design of models using MATLAB/SIMULINK software. Also, induction motor [18] was tested in laboratory conditions that cannot be compared to real conditions of the compound operating motor system with VFD. The proposed model [20] requires additional testing and VFD settings correction in order to use it in real life industrial systems.…”

Section: Introductionmentioning

confidence: 99%

Optimization of VFD Operations for Transporting Equipment of Packages

Urmonienė

Dikun

Janutėnienė

2021

ELEKTRON ELEKTROTECH

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This study is focused on the efficiency of automated transferring system of packages equipped by variable-frequency drive (VFD) and servo drive motor. It was found that rotation frequency of induction motors and linear speed of servo drive decisively affected the unit efficiency that operates in the periodic mode. The system duty cycle was divided in two separate parts taking into account time spans needed to complete the specific tasks by each separate equipment of the system. In order to reduce the power usage of the system, the duration of each part of cycle was extended. Lowered electricity consumption leads to the extension of each cycle’s stage operating times. Frequencies of motors and linear speed of servo drive motors were optimized depending on cycle stages duration. Optimized frequency and linear speed values were calculated and loaded into motors controllers, and the efficiency of each separate equipment was measured, as well as total efficiency of the system. Experimental system debugging using optimized parameters proved that system efficiency increases up to 60 %, and that is closely matched with calculated values.

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“…During the last decades, induction motor (IM) drives are becoming more and more popular in industrial applications as well as in home appliances, thanks to their reliability, low cost, robustness, ease of maintenance, and simplicity of control [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…For indirect control of the IM speed, it uses a threephase voltage source inverter (VSI) controlled by a pulse width modulation (PWM) technique. However, despite its simplicity of implementation, scalar control methods cannot achieve best performances during transients, which is considered as a major disadvantage [1,7,8].…”

Section: Introductionmentioning

confidence: 99%

Real-Time Low-Cost Speed Monitoring and Control of Three-Phase Induction Motor via a Voltage/Frequency Control Approach

Hmidet

Boubaker

2020

Mathematical Problems in Engineering

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In this paper, a new design of a real-time low-cost speed monitoring and closed-loop control of the three-phase induction motor (IM) is proposed. The proposed solution is based on a voltage/frequency (V/F) control approach and a PI antiwindup regulator. It uses the Waijung Blockset which considerably alleviates the heaviness and the difficulty of the microcontroller’s programming task incessantly crucial for the implementation and the management of such complex applications. Indeed, it automatically generates C codes for many types of microcontrollers like the STM32F4 family, also used in this application. Furthermore, it offers a cost-effective design reducing the system components and increasing its efficiency. To prove the efficiency of the suggested design, not only simulation results are carried out for a wide range of variations in load and reference speed but also experimental assessment. The real-time closed-loop control performances are proved using the aMG SQLite Data Server via the UART port board, whereas Waijung WebPage Designer (W2D) is used for the web monitoring task. Experimental results prove the accuracy and robustness of the proposed solution.

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An improved algorithm for direct computation of optimal voltage and frequency for induction motors

Cited by 14 publications

References 17 publications

Control Methods for Standalone and Grid Connected Micro-Hydro Power Plants With Synthetic Inertia Frequency Support: A Comprehensive Review

Control Methods for Standalone and Grid Connected Micro-Hydro Power Plants With Synthetic Inertia Frequency Support: A Comprehensive Review

Optimization of VFD Operations for Transporting Equipment of Packages

Real-Time Low-Cost Speed Monitoring and Control of Three-Phase Induction Motor via a Voltage/Frequency Control Approach

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