A Novel Sensorless Photovoltaic Power Reserve Control With Simple Real-Time MPP Estimation

Li, Xingshuo; Wen, Huiqing; Zhu, Yinxiao; Jiang, Lin; Hu, Yihua; Xiao, Weidong

doi:10.1109/tpel.2018.2880461

Cited by 77 publications

(42 citation statements)

References 46 publications

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“…In [22] and [23], a small PV module was added to measure the open-circuit voltage (or short-circuit current), which requires additional hardware and increases the cost and complexity. In [24], the short-circuit current was estimated by the sampled current and voltage, but it required PV array parameters and solved the complex Lambert-W function to calculate MAP. Furthermore, compromised by the inevitable deviations of actual PV array parameters from data sheet values, the accuracy of MAP estimates will be affected.…”

Section: Introductionmentioning

confidence: 99%

A Novel Frequency Regulation Strategy for a PV System Based on the Curtailment Power-Current Curve Tracking Algorithm

2020

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The challenges of modern power systems with a high level of renewable generation penetration will impose increased ancillary service on Photovoltaic (PV) systems, including frequency regulation. In this paper, a frequency regulation strategy for PV systems without energy storage is proposed. The proposed strategy is divided into two layers: the frequency regulation layer and the power reserve control layer. In the power reserve control layer, a novel power reserve control is proposed as the core element and novel feature. The existing power reserve control for PV systems must estimate the maximum available power, which is difficult because of the variation in environmental conditions and complex modeling of PV systems. Instead, a power tracking control method based on a curtailment power-current curve is proposed. It can automatically track a given reserve ratio under any environmental condition without an irradiance sensor. In the frequency regulation layer, the combination of droop control and virtual inertia control is used to adjust the given power reserve ratio. Simulation results show that the proposed strategy offers good accuracy and tracking speed and can significantly improve the frequency response of the power system. INDEX TERMS PV system, power reserve control, frequency response, voltage tracking.

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Section: Introductionmentioning

confidence: 99%

A Novel Frequency Regulation Strategy for a PV System Based on the Curtailment Power-Current Curve Tracking Algorithm

2020

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“…However, unlike conventional generators, PV systems have no natural inertia and must reserve some of the available power to participate in the system frequency response [8][9][10]. In principle, there is two methods for implementing the power reserve: (i) installation of an energy storage device, such as a battery or a supercapacitor, which has the disadvantage of increasing the system maintenance costs and complexity [5,8,[11][12][13][14][15]; (ii) operation of PV systems at a suboptimal power point to reserve partial frequency regulation power, which is simple and costeffective [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31]. This study is focused on the latter method.…”

Section: Introductionmentioning

confidence: 99%

“…In [24], an additional small PV module is used to measure the short‐circuit current, and an off‐line fitting function of the short‐circuit current and the maximum power is used to estimate MAP. In [25], the PV operates in the constant current region. The measurement PV array current is used to estimate the short‐circuit current to further estimate the maximum power point (MPP) current and the MPP power.…”

Section: Introductionmentioning

confidence: 99%

Flexible power‐point‐tracking‐based frequency regulation strategy for PV system

Zhong

Zhou

Zhang

et al. 2020

IET Renewable Power Generation

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This study proposes a novel frequency regulation strategy based on a power reserve control method. Unlike existing strategies, irradiance information and complex model estimation are not required, except for the maximum power curve. The suboptimal power point at any irradiance and reserve ratio can be automatically converged with the proposed tracking method. Furthermore, an adaptive step-size tracking method is proposed to improve the output power fluctuation around the suboptimal power point. The simulation results with several scenarios are used to verify that the proposed strategy can quickly and robustly track a given power reserve ratio under the irradiance and reserve ratio variation conditions. The proposed strategy can significantly improve the frequency response of power systems with photovoltaic (PV) generation.

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“…Entretanto, a operação descarregada também acarreta na redução da receita proveniente da venda de energia (Dreidy, Mokhlis e Mekhilef, 2017). Todavia, do ponto de vista do operador do sistema elétrico, a operação descarregada das unidades renováveis é uma alternativa mais barata para a manutenção da frequência do sistema quando comparada à instalação de banco de baterias ou à operação das unidades síncronas convencionais em níveis mínimos de potência (Liu et al, 2018;Li et al, 2019). Ademais, a perda de receita atrelada à redução da geração pode ser compensada pela renda obtida na prestação de serviços ancilares (Rajan e Fernandez, 2019).…”

Section: Introductionunclassified

Controle Inercial e de Frequência para Sistemas com Dominância da Geração Eólica e Fotovoltaica Centralizada

Tessaro

Oliveira

Feldmann

2020

Anais Do Simpósio Brasileiro De Sistemas Elétricos 2020

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A geração renovável intermitente e centralizada, representada principalmente pelas fazendas eólicas e fotovoltaicas, tem apresentado percentuais de inserção significativos e crescentes nos sistemas de potência. Acompanhado dessa expansão, surgem problemas operacionais atrelados à resposta inercial e à margem de potência dos sistemas de potência. Nesse contexto, este trabalho avalia a capacidade da geração eólica e fotovoltaica em fornecer resposta inercial, operar com margem de potência e participar do controle da frequência, bem como o impacto dessa estratégia operacional sobre a frequência do sistema. Os resultados obtidos mostram que a estratégia operacional e de controle melhora significativamente a resposta da frequência do sistema ao mesmo tempo que minimiza o impacto das variações da velocidade de vento e irradiância solar na frequência.

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A Novel Sensorless Photovoltaic Power Reserve Control With Simple Real-Time MPP Estimation

Cited by 77 publications

References 46 publications

A Novel Frequency Regulation Strategy for a PV System Based on the Curtailment Power-Current Curve Tracking Algorithm

A Novel Frequency Regulation Strategy for a PV System Based on the Curtailment Power-Current Curve Tracking Algorithm

Flexible power‐point‐tracking‐based frequency regulation strategy for PV system

Controle Inercial e de Frequência para Sistemas com Dominância da Geração Eólica e Fotovoltaica Centralizada

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