scispace - formally typeset
Proceedings ArticleDOI

MPP tracking of PV based low voltage DC microgrid system with adaptive droop algorithm

14 Jun 2015-pp 1-4
TL;DR: This paper proposes an adaptive droop based MPP tracking and load sharing of PV based dc microgrid with proportional droop index (PDI) algorithm, which is a function of normalized current sharing difference and losses in the output side of the converters.
Abstract: Several control methods are available in the literature for maximum power point (MPP) tracking, load sharing etc. in a photovoltaic (PV) based microgrid system. This paper proposes an adaptive droop based MPP tracking and load sharing of PV based dc microgrid. For this, proportional droop index (PDI) algorithm is introduced, which is a function of normalized current sharing difference and losses in the output side of the converters. This proposed control method calculates adaptive virtual resistance Rdroop, and allows the converter to operate at MPP. By fine tuning Rdroop values, the proposed method also eliminates poor voltage regulation issues of the conventional droop method. The detailed analysis and design procedure are explained and the effectiveness of proposed method is verified by detailed simulation analysis.
Topics: Voltage droop (67%), Maximum power point tracking (56%), Microgrid (56%), Voltage regulation (54%), Voltage regulator (51%)
Citations
More filters

Journal ArticleDOI
TL;DR: A decentralized coordination control strategy that applies the droop concept to cooperate multiple PV sources in a dc microgrid and enables PV sources to regulate the dc bus voltage and share their output power in an expected proportion is developed.
Abstract: DC microgrids provide a coordinated paradigm to facilitate the penetration of photovoltaic (PV) sources due to their direct current essence. Along with the sustained growth of PV penetration, there is an increasing demand on PV sources to participate in dc bus voltage regulating, especially in small-sized or islanded dc microgrids. This paper develops a decentralized coordination control strategy that applies $V$ – $I$ droop concept to cooperate multiple PV sources in a dc microgrid. The proposed method enables PV sources to regulate the dc bus voltage and share their output power in an expected proportion. Furthermore, the maximum power point tracking (MPPT) function is unified in the suggested control method with a $dp/dv$ regulator, which means multiple PV sources can work in the MPPT mode when they are grid-connected or shift with load demands in an coordinated way while keeping the dc bus voltage without switching the control configuration. Hardware-in-loop tests for different scenarios are conducted to validate the feasibility and effectiveness of the proposed control strategy.

24 citations


Cites methods from "MPP tracking of PV based low voltag..."

  • ...propose a modified droop algorithm for control of a PV-based low-voltage dc microgrid system [17], [18]....

    [...]


Proceedings ArticleDOI
01 Nov 2019-
TL;DR: The integrated MPPT algorithm with droop control algorithm based on modified P&O algorithm operates the system not only in power sharing mode but also in MPPT mode to obtain the maximum power.
Abstract: Ensuring a proportional power sharing algorithm for parallel connected sources in a microgrid system makes them more efficient and prevents their overloading. For this purpose, the droop control technique is one of the widely used methods. However, this technique is generally insufficient to obtain maximum power from intermittent sources such as photovoltaic (PV) systems and wind turbines. Therefore, this paper presents the integration of MPPT algorithm with droop control algorithm of a PV system. Thus, the droop control method based on modified P&O algorithm operates the system not only in power sharing mode but also in MPPT mode to obtain the maximum power. The developed algorithm is compared with conventional droop control methods and satisfying results are obtained.

3 citations


Cites methods from "MPP tracking of PV based low voltag..."

  • ...Droop control methods have been also integrated with MPPT algorithms to increase the efficiency of intermittent energy sources like PVs and wind turbines [8,14,15,16]....

    [...]


Proceedings ArticleDOI
28 Sep 2020-
Abstract: The coordinated and efficient operation of Solar PV system combined with battery storage systems makes a standalone DC Community Grid stable and reliable. The accurate power sharing between the distributed renewable energy sources of a DC community grid according to the available source and load demand is managed through droop control algorithm and droop resistance adaptable to the variations in the sources (Uncertainties in Solar Power). This paper presents an adaptive droop control algorithm developed based on the existing source converted as the reference current for operating the converters to meet the demand. The changes in the output potential of each converter is controlled and is maintained constant throughout the operation of DC community grid and makes it stable. The proposed control algorithm is implemented to the system individually to make it a communication less control. The adaptive droop control algorithm relies on the local measurement data from each converter like, output voltage, current, rated load current and DC Bus voltage. The control strategy is applied to a simple DC microgrid representing a local community grid with solar PV as the source and battery as the support system on standalone mode of operation developed using MATLAB-Simulink® and is validated for three different power sharing scenarios.

Cites methods from "MPP tracking of PV based low voltag..."

  • ...The boost converter generates a constant output voltage by adopting Proportional Integral based control algorithm to generate PWM signals for triggering the converters [10]....

    [...]


References
More filters

Journal ArticleDOI
Abstract: The many different techniques for maximum power point tracking of photovoltaic (PV) arrays are discussed. The techniques are taken from the literature dating back to the earliest methods. It is shown that at least 19 distinct methods have been introduced in the literature, with many variations on implementation. This paper should serve as a convenient reference for future work in PV power generation.

4,654 citations


11


"MPP tracking of PV based low voltag..." refers background in this paper

  • ...A comparative study on MPPT techniques for photovoltaic (PV) power systems is reported in [1] and [3]....

    [...]

  • ...INTRODUCTION Photovoltaic (PV) energy is emerging as an alternative solution due to the increasing demand on electricity [1]....

    [...]


Journal ArticleDOI
01 Nov 2009-
TL;DR: The hierarchical control derived from ISA-95 and electrical dispatching standards to endow smartness and flexibility to MGs is presented and results are provided to show the feasibility of the proposed approach.
Abstract: DC and AC Microgrids are key elements to integrate renewable and distributed energy resources as well as distributed energy storage systems. In the last years, efforts toward the standardization of these Microgrids have been made. In this sense, this paper present the hierarchical control derived from ISA-95 and electrical dispatching standards to endow smartness and flexibility to microgrids. The hierarchical control proposed consist of three levels: i) the primary control is based on the droop method, including an output impedance virtual loop; ii) the secondary control allows restoring the deviations produced by the primary control; and iii) the tertiary control manage the power flow between the microgrid and the external electrical distribution system. Results from a hierarchical-controlled microgrid are provided to show the feasibility of the proposed approach.

3,466 citations


"MPP tracking of PV based low voltag..." refers background or methods in this paper

  • ...The droop control method is widely using for load sharing by placing a virtual output impedance on each converter [13]....

    [...]

  • ...Virtual impedance method [13] is used to implement Rdroop and is shown in Fig....

    [...]

  • ...In order to control load sharing, two major control strategies, active current sharing [12] and droop control [13] methods are explained in the literature....

    [...]


Journal ArticleDOI
Abstract: This paper provides a comprehensive review of the maximum power point tracking (MPPT) techniques applied to photovoltaic (PV) power system available until January, 2012. A good number of publications report on different MPPT techniques for a PV system together with implementation. But, confusion lies while selecting a MPPT as every technique has its own merits and demerits. Hence, a proper review of these techniques is essential. Unfortunately, very few attempts have been made in this regard, excepting two latest reviews on MPPT [Salas, 2006], [Esram and Chapman, 2007]. Since, MPPT is an essential part of a PV system, extensive research has been revealed in recent years in this field and many new techniques have been reported to the list since then. In this paper, a detailed description and then classification of the MPPT techniques have made based on features, such as number of control variables involved, types of control strategies employed, types of circuitry used suitably for PV system and practical/commercial applications. This paper is intended to serve as a convenient reference for future MPPT users in PV systems.

1,331 citations


"MPP tracking of PV based low voltag..." refers background in this paper

  • ...A comparative study on MPPT techniques for photovoltaic (PV) power systems is reported in [1] and [3]....

    [...]


Journal ArticleDOI
TL;DR: A modified variable step size INC MPPT algorithm is proposed, which automatically adjusts the step size to track the PV array maximum power point and can effectively improve the MPPT speed and accuracy simultaneously.
Abstract: Maximum power point tracking (MPPT) techniques are employed in photovoltaic (PV) systems to make full utilization of PV array output power which depends on solar irradiation and ambient temperature. Among all the MPPT strategies, the incremental conductance (INC) algorithm is widely used due to the high tracking accuracy at steady state and good adaptability to the rapidly changing atmospheric conditions. In this paper, a modified variable step size INC MPPT algorithm is proposed, which automatically adjusts the step size to track the PV array maximum power point. Compared with the conventional fixed step size method, the proposed approach can effectively improve the MPPT speed and accuracy simultaneously. Furthermore, it is simple and can be easily implemented in digital signal processors. A theoretical analysis and the design principle of the proposed method are provided and its feasibility is also verified by simulation and experimental results.

1,108 citations


9


"MPP tracking of PV based low voltag..." refers methods in this paper

  • ...By using incremental conductance method [7]–[9] MPP can be tracked by comparing the instantaneous conductance ( I V ) to the incremental conductance ( ΔI ΔV ) based on the fact that slope of the PV array power is zero at MPP....

    [...]


Journal ArticleDOI
Abstract: Detailed theoretical and experimental analyses are presented for the comparison of two simple fast and reliable maximum power point tracking (MPPT) techniques for photovoltaic systems (PV): the voltage-based (VMPPT) and the current-based (CMPPT) approaches. A microprocessor-controlled tracker capable of online voltage and current measurements and programmed with both VMPPT and CMPPT algorithms is constructed. The load of the solar system is either a water pump or a resistance. Simulink facilities are used for simulation and modeling of the novel trackers. The main advantage of this new MPPT, as compared with present trackers, is the elimination of reference (dummy) cells, which results in a more efficient, less expensive, and more reliable PV system.

719 citations


Performance
Metrics
No. of citations received by the Paper in previous years
YearCitations
20201
20191
20181