Versatile power transfer strategies of PV-battery hybrid system for residential use with energy management system

Choi, Seong-Chon; Sin, Min-ho; Kim, Dong-Rak; Won, Chung-Yuen; Jung, Yong-Chae

doi:10.1109/ipec.2014.6869615

Cited by 11 publications

(3 citation statements)

References 6 publications

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“…To manage DC power sources, hybrid systems have also been proposed. [23] proposed the optimal energy management system for hybrid power supply systems with PV and a battery, which uses power flow management to balance power streams between storage battery, PV panel and power load in gridconnected mode. In [24], on the other hand, optimal power flow management model is proposed for solar battery power supply system for off-grid application.…”

Section: Managing Methods Of Distributed Power Sources and Implemmentioning

confidence: 99%

Cooperative distributed control implementation of the power flow coloring over a nano-grid with fluctuating power loads

Javaid

Kurose

Kato

et al. 2017

2017 IEEE Manchester PowerTech

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To realize efficient and versatile energy management systems for future homes, buildings, and local communities, Nano-grid (NG) finds possibility for integrating distributed energy resources. This paper implements the power flow coloring, which gives a unique ID to each power flow between a specific power source and a specific power load. It enables us to design versatile power flow patterns between distributed power sources and loads taking into account energy availability, cost, and carbon dioxide emission. To implement the power flow coloring, this paper proposes a cooperative distributed control method, where a master-slave role assignment scheme of power sources and a time-slot based feedback control are introduced to cope with power fluctuations while keeping the voltage stability of the NG. Experimental results show the practical feasibility of our proposed method in managing distributed power sources and fluctuating loads.

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Section: Managing Methods Of Distributed Power Sources and Implemmentioning

confidence: 99%

Cooperative distributed control implementation of the power flow coloring over a nano-grid with fluctuating power loads

Javaid

Kurose

Kato

et al. 2017

2017 IEEE Manchester PowerTech

View full text Add to dashboard Cite

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“…To account for the impact of high penetrations of ES applications, the load profile changes established in Munson's research was applied to the typical profile [4]. These profile augmentations align with changes produced by hybrid PV and ES systems that are utilized to improve grid stability and customer participation [21][22][23][24]. Utilizing time-of-use practices by utility companies such as Pacific Gas & Electric in California that incentivize customers to charge during the period between 11pm and 7am, the impact of EV charging was applied to the typical load profile [25].…”

Section: Historical Profile Vs Flattened Profilementioning

confidence: 99%

Demand Side Management Effects on Substation Transformer Capacity Limits

2019

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In high penetrations, demand side management (DMS) applications augment a substation power transformer’s load profile, which can ultimately affect the unit’s capacity limits. Energy storage (ES) applications reduce the evening peaking demand, while time-of-use rates incentivize end-users to charge electric vehicles overnight. The daily load profile is further augmented by high penetrations of photovoltaic (PV) systems, which reduce the midday demand. The resulting load profile exhibits a more flattened characteristic when compared to the historical cyclic profile. Although the initial impact of PV and ES applications may reduce a unit’s peak demand, long-term system planning and emergency conditions may require operation near or above the nameplate rating. Researchers have already determined that a flattened load profile excessively ages a unit’s dielectrics more rapidly. The focus of this research was to identify an approach for establishing new transformer capacity limits for units serving flattened load profiles with a high harmonic content. The analysis utilizes IEEE standards C57.91 and C57.110 to develop an aging model of a 50 MVA SPX Waukesha transformer. The results establish a guideline for determining transformer capacity limits for normal operation, long-term emergency operation, and short-term emergency operation when serving systems with high penetrations of DSM applications.

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“…The charging/discharging rate of the battery is controlled based on the frequency droop characteristic. In [16], the authors propose a power transfer strategy (PTS) by which, through a specific EMS, output fluctuation of renewable energy, load demand, state of the grid, peak load period and state of charge (SOC) of the battery are taken into account to effectively operate the grid-connected hybrid system. Numerous models are developed by considering multiple sources of power [17][18][19].…”

mentioning

confidence: 99%

Combined Operation of Electrical Loads, Air Conditioning and Photovoltaic-Battery Systems in Smart Houses

et al. 2017

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In this paper, a novel Energy Management System (EMS) is proposed for a hybrid energy system with photovoltaic (PV) and energy storage system for a smart house. The EMS is designed to control the shiftable loads, the air conditioning and the electric storage system. The aim is to reduce the electrical energy consumption cost without compromising the end-user comfort. Monte Carlo Simulation (MCS) is used to estimate the optimal size of the hybrid system considering energy saving and investment costs. Simulations results confirm the effectiveness of the proposed EMS in decreasing the electrical energy consumption and costs. The proposed method for the sizing of the hybrid system is also able to select the best size of the PV-battery system in smart houses. Some studies focus on the characteristics of the converters in the micro-grid systems with the aim of improving the conversion efficiency. In [7], a hybrid system consisting of a PV array and rechargeable battery integrated to the distribution grid is presented. The system performs load sharing with the distribution grid by controlling the voltage source inverter (VSI), the boost and the buck-boost converters. The cost-benefits problem of solar PV technology is analyzed in [8,9]. In [8], the authors propose a system with given PV modules and EES based on bank capacities to solve the daily energy flow control problem. Furthermore, in order to facilitate intensive penetration of PV production into the grid, a method is proposed in [9]. Peak shaving is realized with the minimal cost and power fluctuations on the grid are reduced by using a power supervisor based on a predictive power scheduling algorithm. A basic analysis study of stand-alone solar PV micro-grid power system is presented in [10]. The system is designed on the basis of residential load profile and solar exposure level in a particular area. In order to improve the integration of PV and energy storage systems, a power management strategy is designed to manage power flows between PV systems and an ultra-capacitor (UC) [11].A numerical model that computes an optimized capacity of energy consumption is proposed in [12]. This model is based on weekly forecast with the aim of providing a stable energy that is insulated from the instability of weather change. The system is able to increase the energy consumption in normal days while maintaining minimum stable energy in bad weather conditions.To increase the use of PV energy in the residential applications, some researchers suggest a control of power flow and a selection of MPPT parameters for grid-connected PV systems with battery storage [13]. Other works discuss these issues in terms of innovative converter features for PV-battery systems [14]; a reconfigurable solar converter (RSC) is presented to perform dc/ac and dc/dc operations, by using a single-stage three phase grid-tie solar PV converter.A control method for the power electronic converters is discussed in [15]: the potential of utilizing battery energy storage for participating in primary frequenc...

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Versatile power transfer strategies of PV-battery hybrid system for residential use with energy management system

Cited by 11 publications

References 6 publications

Cooperative distributed control implementation of the power flow coloring over a nano-grid with fluctuating power loads

Cooperative distributed control implementation of the power flow coloring over a nano-grid with fluctuating power loads

Demand Side Management Effects on Substation Transformer Capacity Limits

Combined Operation of Electrical Loads, Air Conditioning and Photovoltaic-Battery Systems in Smart Houses

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