Decentralized Coordination Power Control for Islanding Microgrid Based on PV/BES-VSG

Mao, Meiqin; Qian, Cheng; Ding, Yong

doi:10.24295/cpsstpea.2018.00002

Cited by 63 publications

(27 citation statements)

References 17 publications

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“…Picking up the PV system in the above typical PV micro-grid as an important research target, it is desirable for the PV system to achieve friendly access through the application of VSG technology. In a general way, in related works [19,20], a PV-VSG control strategy installed with an energy storage battery on the DC side was adopted, as shown in Figure 2. For traditional PV-VSG control, since PV output power is particularly influenced by environmental factors such as light intensity and temperature [13], the energy storage battery is primarily responsible for balancing power through a DC/DC converter so as to match the required power.…”

Section: Overview Of Fundamental Problemsmentioning

confidence: 99%

“…Secondly, the energy storage configuration of PV-VSG will greatly increase the expenses of investment, operation and maintenance [23,28]. The traditional PV-VSG (photovoltaic-virtual synchronous generator) control oriented for the energy storage battery [19,20].…”

Section: Overview Of Fundamental Problemsmentioning

confidence: 99%

“…Whether in off-grid mode or grid-connected mode, no matter when the power demand changes or the light intensity changes, PV power can operate in a stable area to adjust adaptively, and PV-VSG can provide the most effective output power matching under different load/dispatching power requirements, guaranteeing system stability in conditions of insufficient PV power. Accordingly, compared with traditional two-stage PV-VSG equipped with additional energy storage on the DC bus [19][20][21][22], the proposed control method reduces the cost of investment and operation on account of not configuring energy storage.…”

Section: (2) Variation Of Pv Maximum Output Powermentioning

confidence: 99%

“…This type of PV-VSG research ignores the potential impact of PV dynamic characteristics on VSG control, hence limiting the development of PV-VSG. For this reason, the cooperative operation mode of PV and energy storage is discussed in [19][20][21][22], which is referred to as a PV-storage system for short, in which the PV system adds a bidirectional energy storage device at the DC side to stabilize the DC bus voltage and realizes VSG function through the inverter. In the above PV-storage system, the output power of energy storage compensates for the deficiency of the PV dynamic characteristics and the variations of the load or dispatching requirements.…”

Section: Introductionmentioning

confidence: 99%

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Adaptive-MPPT-Based Control of Improved Photovoltaic Virtual Synchronous Generators

Yan

Zhao

et al. 2018

Energies

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The lack of inertia and damping mechanism of photovoltaic (PV) grid-connected systems controlled by maximum power point tracking (MPPT) poses a challenge for the safety and stability of the grid. Virtual synchronous generator (VSG) technology has attracted wide attention, since it can make PV grid-connected inverter present the external characteristics of a synchronous generator (SG). Nevertheless, traditional PV-VSG is generally equipped with an energy storage device, which leads to many problems, such as increased costs, space occupation, and post-maintenance. Thus, this paper proposes a two-stage improved PV-VSG control method based on an adaptive-MPPT algorithm. When PV power is adequate, the adaptive-MPPT allows the PV to change the operating point within a stable operation area to actualize system supply-demand, matching in accordance to the load or dispatching power demand; when PV power is insufficient, PV achieves traditional MPPT control to reduce power shortage; simultaneously, improved VSG control prevents the DC bus voltage from falling continuously to ensure its stability. The proposed control approach enables the two-stage PV-VSG to supply power to loads or connect to the grid without adding additional energy storage devices, the effectiveness of which in off-grid and grid-connected modes is demonstrated by typical simulation conditions.

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Section: Overview Of Fundamental Problemsmentioning

confidence: 99%

Section: Overview Of Fundamental Problemsmentioning

confidence: 99%

Section: (2) Variation Of Pv Maximum Output Powermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adaptive-MPPT-Based Control of Improved Photovoltaic Virtual Synchronous Generators

Yan

Zhao

et al. 2018

Energies

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“…For this reason, the PV-VSG has been proposed by scholars as a way to apply virtual synchronous machine control to photovoltaic inverters to cause them to have better inertia and damping [18][19][20][21]. However, most of existing studies mainly simulate different PV-VSG control strategies and do not analyze the PV-VSG grid-connected system from the perspective of system stability.…”

Section: Introductionmentioning

confidence: 99%

Small-Signal Modeling and Parameter Optimization Design for Photovoltaic Virtual Synchronous Generator

Deng¹,

Xia²,

Yin³

et al. 2020

Energies

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With the continuous proliferation of renewable energy generation, distributed photovoltaic inverters operating at a maximum power point reduce the inertia of power systems, degrading system frequency stability and potentially causing severe oscillations in systems after being disturbed. The virtual synchronous generator (VSG) control method, which causes photovoltaic inverters to possess inertia and damping, now plays an important role in the field of distributed generation. However, while introducing the advantages of synchronous machines, problems with oscillations are also introduced and the stochastic fluctuation characteristic of photovoltaics results in the stochastic drifting of the operating point. This paper presents an adaptive controller parameter design method for a photovoltaic-VSG (PV-VSG) integrated power system. Firstly, a small-signal model of the PV-VSG is built and a state space model is deduced. Then, the small-signal stability and low frequency oscillation characteristics of the photovoltaic power generation system are analyzed. Finally, considering the limitations of system oscillations and the stochastic drifting of the operating point, a global optimization design method for controller parameters used to improve system stability is proposed. The time domain simulation shows that an optimized PV-VSG could provide sufficient damping in the case of photovoltaic power output changes across a wider range.

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PV–BES Microgrid System with LQR-Tuned CC–CVF-Based Control Algorithm

Pandey

Singh

2021

J. Inst. Eng. India Ser. B

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Decentralized Coordination Power Control for Islanding Microgrid Based on PV/BES-VSG

Cited by 63 publications

References 17 publications

Adaptive-MPPT-Based Control of Improved Photovoltaic Virtual Synchronous Generators

Adaptive-MPPT-Based Control of Improved Photovoltaic Virtual Synchronous Generators

Small-Signal Modeling and Parameter Optimization Design for Photovoltaic Virtual Synchronous Generator

PV–BES Microgrid System with LQR-Tuned CC–CVF-Based Control Algorithm

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