Research on Inverter Integrated Reactive Power Control Strategy in the Grid-Connected PV Systems

Li, Hua; Wen, Che; Chao, Kuei‐Hsiang

doi:10.3390/en10070912

Cited by 28 publications

(17 citation statements)

References 26 publications

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“…Possibly, reactive power supply even in periods of low or no irradiance, i.e., no active power generation (nighttime mode or var at night mode) could be of benefit to the distribution power system. Several examples of such inverter topologies and control schemes can be found (e.g., [16][17][18][19][20][21][22]). To cover power losses during reactive power supply, the inverter has to absorb active power from the grid or from an internal energy storage.…”

Section: Analysis Of Reactive Power Compensation By Pv Invertersmentioning

confidence: 99%

“…One PV source per each feeder is considered to be the case of medium PV dispersion rate (8.5 MVA total peak power). Although different control schemes are proposed for finding the optimum level of reactive power generation (e.g., [2,11,22,[26][27][28]), in this research, uniform reactive power generation of individual PV sources is assumed. In fact, the focus of the research was to investigate reactive power generation influence on the overall system behavior.…”

Section: One Pv Source Per Each Feedermentioning

confidence: 99%

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Reactive Power Compensation with PV Inverters for System Loss Reduction

Vlahinić

Franković

Komen³

et al. 2019

Energies

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Photovoltaic (PV) system inverters usually operate at unitary power factor, injecting only active power into the system. Recently, many studies have been done analyzing potential benefits of reactive power provisioning, such as voltage regulation, congestion mitigation and loss reduction. This article analyzes possibilities for loss reduction in a typical medium voltage distribution system. Losses in the system are compared to the losses in the PV inverters. Different load conditions and PV penetration levels are considered and for each scenario various active power generation by PV inverters are taken into account, together with allowable levels of reactive power provisioning. As far as loss reduction is considered, there is very small number of PV inverters operating conditions for which positive energy balance exists. For low and medium load levels, there is no practical possibility for loss reduction. For high loading levels and higher PV penetration specific reactive savings, due to reactive power provisioning, increase and become bigger than additional losses in PV inverters, but for a very limited range of power factors.

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Section: Analysis Of Reactive Power Compensation By Pv Invertersmentioning

confidence: 99%

Section: One Pv Source Per Each Feedermentioning

confidence: 99%

Reactive Power Compensation with PV Inverters for System Loss Reduction

Vlahinić

Franković

Komen³

et al. 2019

Energies

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“…If the compensator voltage magnitude is smaller than the voltage at the connection point, reactive power will be consumed by the STATCOM. On the other hand, if the situation is opposite, reactive power will be delivered to the grid . This principle is presented in the Figure .…”

Section: Reactive Power Compensationmentioning

confidence: 99%

Coordinated reactive power strategy using static synchronous compensator for photovoltaic inverters

Fatama

Khan

Kurukuru

et al. 2020

Int Trans Electr Energ Syst

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Summary Large photovoltaic (PV) penetrations into the electric grid resulted in new challenges such as reverse power flow and violation of voltage profile. The traditional methods for voltage regulation in a grid‐connected PV system are hardly adaptable to these changes as they only contain the local information which is used without the knowledge of how the control action affects the overall system. To address this problem, this paper extends the reactive power control capability of solar PV inverters by combining them with static power electronic devices for regulating voltage during grid faults. For efficient identification of grid faults, a support vector machine‐based fault classification mechanism is developed. The proposed method prioritizes the reactive power control using PV inverter by adapting a predefined hierarchical control structure. The complete methodology is realized by testing it with a two‐stage single‐phase grid‐connected PV system. The experimental results verify the accuracy of the classification algorithm and depict the effectiveness of the proposed controller in both under and overvoltage situations.

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“…They need to connect to the grid to function, and they can send excess power generated back to the grid when the energy consumption of the building or facility is low. Moreover, these systems are characterized by low costs, high efficiency, strong scalability and high reliability [52][53][54][55][56][57].…”

Section: Popular Pv Inverter Technologies and Systems In Hungarymentioning

confidence: 99%

Economic Analysis of Grid-Connected PV System Regulations: A Hungarian Case Study

et al. 2019

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The energy demand of mankind is constantly growing, thus the utilization of various renewable energy sources, which also reduces negative environmental effects, is becoming more and more important. Because of the achievement of climate protection targets, photovoltaic (PV) energy has an increasing role in the global energy mix. This paper presents the technical and economic aspects of different photovoltaic system configurations designed to suit the Hungarian renewable energy regulations. In this study, five alternative PV configurations were examined for systems with a capacity from 50 kW to 500 kW, related to low- and medium-voltage installations. This article also introduces and explains the Hungarian economic PV and Feed-in-Tariff (FiT) regulations, where three different investment alternatives are analyzed with the help of economic indicators. This study could help stakeholders in the market (e.g., the Hungarian industry sector and local governments) understand the possible directions of technical and economic PV development. According to the results, the payback periods in all the studied economic-technical cases were below 10 years. The experimental results show that each investment option may be a good decision from an economic and technical point of view under the Hungarian regulations in force in 2019.

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Research on Inverter Integrated Reactive Power Control Strategy in the Grid-Connected PV Systems

Cited by 28 publications

References 26 publications

Reactive Power Compensation with PV Inverters for System Loss Reduction

Reactive Power Compensation with PV Inverters for System Loss Reduction

Coordinated reactive power strategy using static synchronous compensator for photovoltaic inverters

Economic Analysis of Grid-Connected PV System Regulations: A Hungarian Case Study

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