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Stand-alone power system

About: Stand-alone power system is a research topic. Over the lifetime, 8650 publications have been published within this topic receiving 192397 citations. The topic is also known as: Stand-alone photovoltaic power system.


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Journal ArticleDOI
TL;DR: In this article, the authors proposed a near-optimal storage control algorithm for residential PV-based energy generation and controllable energy storage devices for peak shaving on their power demand profile, thereby minimizing their electricity bill.
Abstract: Integrating residential photovoltaic (PV) power generation and energy storage systems into the Smart Grid is an effective way of reducing fossil fuel consumptions. This has become a particularly interesting problem with the introduction of dynamic electricity energy pricing, since consumers can use their PV-based energy generation and controllable energy storage devices for peak shaving on their power demand profile, thereby minimizing their electricity bill. A realistic electricity pricing function is considered with billing period of a month, comprising both an energy price component and a demand price component. Due to the characteristics of electricity price function and energy storage capacity limitation, the residential storage control algorithm should 1)utilize PV power generation and load power consumption predictions and 2)account for various energy loss components during system operation, including energy loss components due to rate capacity effect in the storage system and power dissipation of the power conversion circuitry. A near-optimal storage control algorithm is proposed accounting for these aspects. The near-optimal algorithm, which controls the charging/discharging of the storage system, is effectively implemented by solving a convex optimization problem at the beginning of each day with polynomial time complexity. For further improvement, the reinforcement learning technique is adopted to adaptively determine the residual energy in the storage system at the end of each day in a billing period.

110 citations

Journal ArticleDOI
TL;DR: In this article, a comparative analysis is performed between the electricity load curve for a typical year and a typical day and statistical data for wind speed and solar irradiation, showing that correlations exist and renewable energy can help support regional temporal demand in the existing electricity grid.
Abstract: The objective of this research is to analyze the effectiveness of wind power and solar energy to supply electricity to the grid during peak demand periods in the Northeast of Brazil. To achieve this objective, a comparative analysis is performed between the electricity load curve for a typical year and a typical day and statistical data for wind speed and solar irradiation. The results obtained indicate that correlations exist and renewable energy can help support regional temporal demand in the existing electricity grid in an efficient and more environmentally friendly manner than fossil fuel power plants. Another interesting finding was the complementarity between hydroelectricity (the region's main energy resource) and wind and solar energy. That is, in the months of the dry season (when the cost of energy is more expensive) there is a greater availability of wind and solar energy. This makes investments in these two renewable sources more economically viable and also helps to diversify the electricity grid power supply, securing it against the effects of droughts.

109 citations

Journal ArticleDOI
01 Feb 2014-Energy
TL;DR: In this article, the authors present high renewable electricity penetration scenarios in the United States using detailed capacity expansion modeling that is designed to properly account for the variability and uncertainty of wind and solar resources.

109 citations

01 Jan 2012
TL;DR: In this article, an improved optimal sizing method for hybrid wind-solar-battery power system, considering the system working in both stand-alone and grid-connected modes, was proposed.
Abstract: Compared with separate photovoltaic or wind power generation,the hybrid wind-solar power generation system can achieve a less fluctuation of output power due to the complementary characteristics of wind and solar resources.A reasonable capacity of wind/solar/battery can not only improve the power supply reliability,but also reduce the total cost of the system.This paper proposed an improved optimal sizing method for hybrid wind-solar-battery power system,considering the system working in both stand-alone and grid-connected modes.The proposed method took full advantage of the complementary characteristics of wind and solar,which could achieve a high power supply reliability while require less battery capacity in stand-alone mode.Moreover,the depth of discharge and charge/discharge cycles of the battery was reduced.And the sub-period optimization strategy was further utilized to calculate the optimal battery capacity,which could ensure both the load demand and fluctuation of power injected into the grid to meet the requirements in grid-connected mode.A case study was presented to verify the advantages of the improved optimal sizing method.

109 citations

Proceedings ArticleDOI
22 May 2016
TL;DR: In this paper, the domestic and foreign standards for interconnecting distributed resources with electric power systems, and compares the contents of power quality, response to abnormal conditions, power control, voltage regulation and the ability of fault ride-through in some typical standards.
Abstract: This paper introduces the domestic and foreign standards for interconnecting distributed resources with electric power systems, and compares the contents of power quality, response to abnormal conditions, power control, voltage regulation and the ability of fault ride-through in some typical standards. Some items in wind power generation and photovoltaic power generation standards are concretely introduced. The cause of the difference between the standards is analyzed, and the development trend of the future standards for interconnecting distributed resources with electric power systems is discussed. This paper provides reference for the further improvement of the standards for grid-integration of distributed resources.

109 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202388
2022188
20213
20208
20196
201843