A study of economic feasibility of Smart Community. - calculation of profit of Community Operator considering introduction of battery and co-generation systems
The idea of smart community which is expected to achieve effective utilization of energy at customer side, and contribute to stable operation of power system, for example peak shaving, et. is introduced recently. Since the smart community would optimize the local operation of the community that might affect the stable operation of distribution power system and whole power system, the development of cooperative operation method between community and power system is important. In order to develop the operation method of the community considering cooperation with power system, development of smart community model that is economically feasible is necessary. This report develops the economical evaluation model of smart community for arbitrary condition such as electricity price, purchasing price of generated power of PV, wheeling charge, et. and evaluate the economic efficiency of smart community. According to the evaluation results, a community operator can get benefit by operating community under the condition such as the lower penetration rate of PV, and higher rate of residential area that includes low voltage customers, in which the community operator can sell much electricity with expensive price to low voltage customers. By introducing co-generation system and utilizing exhaust heat for industrial area, the economic efficiency would increase and the community operator can get benefit from dealing with electricity transaction and selling exhaust heat to industrial customer. This paper also considers the Business Continuity Plan (BCP) and evaluates the maximum storage capacity under the condition that the community operator can get benefit, where the battery would be used for back-up power supply when the disaster occurred.
Smart energy community: A systematic review with metanalysis
Abstract Smart energy community, energy community or many other variants of this name has been researched since the 70s but has gained more prominence in the last decade. In order to better understand the concept of energy community and analyze the main research trends in this subject, it was performed a systematic literature review using six databases and a set of carefully chosen keywords obtained after preliminary analysis of energy community concept and its many variations. As a result, the literature review shows that there are many concepts and overlapping of definitions, which creates confusion between researches and readers and the need to standardize the terminology used. Results also highlight the need to analyze the synergistic improvement in multi-purpose energy communities and to research energy islands as smart communities in a way to simulate, create and implement solutions that can be adapt in land communities.
Development of Autonomous Demand Area Power System -Operation and control for regulation of system voltage-
In 6.6 kV power distribution system of Japan, the introduction of many distributed power generations (DGs) is expected. Under such circumstances, power flow congestion and voltage fluctuation on distribution lines caused by varied output of the DGs will occur. This will result in a failure to maintain power quality and supply reliability by conventional power system management. In this paper, we have proposed a new power supply system referred to as the Autonomous Demand Area Power System (ADAPS). ADAPS may be in the loop formation, in addition to the conventional tree branch form. We try to establish network technology and operation management technology of ADAPS, and identify its effectiveness. Using real scale experimental equipments, we performed reducing the voltage fluctuation caused by changing load and output of DGs, and regulating the system voltage by collecting system information via Supply and Demand Interfaces and controlling Loop Power Flow Controllers. Therefore, we checked that the operation method (by Operation Control System) of ADAPS was effective in the viewpoint of voltage regulation. Moreover, we studied on suitable voltage regulation method (control voltage rise of DG, SVC control and LPC control) according to interconnection rate of DG by computer simulation about regulating system voltage in residential and commercial area models. (4 pages)