Modelling and investigation of clean power wind energy systems by using UPQC

K, Venkata Rami Reddy; T, Gowri Manohar

doi:10.1002/er.3624

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…Hecnce, with the above investigateion, it concludes that the proposed controlling scheme is robust and applies to various situations. The complete parameters list can be found in [22]. …”

Section: Resultsmentioning

confidence: 99%

Advance Technology in Application of Four Leg Inverters to UPQC

Reddy¹,

Manohar²,

Sekhar³

2016

IJPEDS

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This article presents a novel application of four leg inverter with conventional Sinusoidal Pulse Width Modulation (SPWM) Scheme to Unified Power Quality Conditioner (UPQC). The Power Quality problem became burning issues since the starting of high voltage AC transmission system. Hence, in this article it has been discussed to mitigate the PQ issues in high voltage AC systems through a three phase Unified Power Quality Conditioner (UPQC) under various conditions, such as harmonic mitigation scheme, non linear loads, sag and swell conditions as well. Also, it proposes to control harmoincs with various artificial intelligent techniques. Thus application of these control technique such as Artifical Neural Networks, Fuzzy Logic makes the system performance in par with the standards and also compared with existing system. The simulation results based on MATLAB/SIMULINK<sup>TM </sup>are discussed in detail to support the concept developed in the paper.

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“…Hecnce, with the above investigateion, it concludes that the proposed controlling scheme is robust and applies to various situations. The complete parameters list can be found in [22]. …”

Section: Resultsmentioning

confidence: 99%

Advance Technology in Application of Four Leg Inverters to UPQC

Reddy¹,

Manohar²,

Sekhar³

2016

IJPEDS

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A Lyapunov function theory‐based nonlinear control strategy for NPC ‐type three‐level unified power quality conditioner

Zhou

Mao

et al. 2020

Int Trans Electr Energ Syst

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Summary Classic control methods commonly used for a unified power quality conditioner (UPQC) include the following: proportional integral (PI) control, proportional resonance (PR) control, and repetitive control. Generally, the main weaknesses of these control methods are poor compensation accuracy and low response speed. In this article, in order to enhance the overall performance of the system, we introduce an innovative nonlinear control strategy based on the Lyapunov function for the three‐phase three‐wire neutral‐point clamp (NPC) type three‐level UPQC. We first develop the mathematical UPQC model, then obtain from the model the control law which we use to construct the switching function by creating the Lyapunov function, thus avoiding the introduction of closed‐loop feedback. The suggested strategy also achieves system stability and dynamic performance by selecting appropriate parameters, after which a carrier‐based pulse width modulation control method based on the injected zero‐sequence component is applied to maintain the stability and balance of the DC‐side capacitor voltage. In addition, both numerical simulation and comparison of experimental results using traditional PI control, passivity‐based control methods, and sliding mode control shows that the proposed nonlinear control strategy for three‐phase three‐wire NPC type three‐level UPQC has an excellent response speed and compensation efficiency.

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