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This paper presents economic dispatch of the grid-connected microgrid that contains multiple energy storage systems as its only controllable distributed energy resources. Daily control schedules of distributed energy resources are achieved by solving the economic dispatch problem. The main objective of economic dispatch is maximizing the profit from the power trade with the grid. The economic dispatch...
IoT smart energy management is to maximize energy efficiency through energy information collection, energy DR management and energy sharing/trading by developing IoT-based smart energy platform technology. IoT smart energy management services provide energy efficiency enhancement, energy sharing and trading services through interconnection and integration of energy supply-transfer-utilization energy...
The present paper allows to hybrid energy management for community energy system facilities. Energy management system is enabled cost savings through efficient use of energy. Active initiatives for energy management begin from the baseline of energy use. Given the vast amount of data and comparable systematized information gathered from greenhouse gas and energy IT systems, it is possible to reduce...
This paper analyzes energy cost reduction from peak demand shaving when a CES provider adopts ESS for the CHP-based CES microgrid site in Seoul, Korea. The simulation results show that about 9% of peak shaving can be realized when a 270kWh ESS is used for three thousand CES households. When two or three ESSs are adopted, peak demand shaving increases at most into 12% or 14%, which concludes that ESS...
This paper proposes energy management in smart home with solar renewable energy using smart plug and inverter. Through the smart plug, information on all loads in the home is monitored and collected to an energy management center. Load profiles are managed, and the loads are classified dynamically based on the profiles in the center. When a power failure occurs, the multimode solar inverter supplies...
The present paper allows to energy information collecting agent for IoT BigData system. Energy management system (EMS) is computer-based platform to monitor and control energy usage at a smart home and building. There are several model EMS — centralized and distributed. This paper suggested hybrid architecture of EMS for efficiently energy management.
As the IoT environment, in which all objects are connected and information is shared, is being expanded, new services are being applied to the traditional energy services gradually. In this paper, the PhotoVoltaic(PV) monitoring system, which is required to develop efficient management service for Solar power generation system, was developed by applying IoT technology and it shows that it is possible...
This paper proposes a three-phase microgrid which consists of two renewable energy sources, an energy storage, and a power conditioning system (PCS). The renewable energy generated from the photovoltaic arrays is provided to a load and the storage through an inverter and a charger, respectively. The PCS coordinates the energy flow from the sources such as a utility grid and the renewable energy sources...
Internet of Things (IoT) has been prevailing to offer advanced connectivity of devices, systems, and services. As connected IoT devices have enhanced smart home, connected smart homes are expected to grow into smart community. However, several previous studies about smart community require a remote central server and do not consider local collaboration based on local direct communication networks...
This paper analyses the economic feasibility of PV installation for a CES apartment complex in Seoul, Korea. PV installation cost is estimated based on the real PV installation for a building in the complex. PV power generation amount of the complex is estimated based on the real PV power generation data from ETRI, Korea. Real power consumption data for the CES from year 2015∼2016 is used for the...
Photovoltaic (PV) is an attractive renewable energy source and the global cumulative PV capacity is growing steadily. Implementation of a cost-effective wireless PV monitoring system at panel level is required in order to apply it commercially to the massive number of PV panels and to enhance convenience of maintenance of PV systems. This paper proposes an implementation method for cost-effective...
This paper presents the application of vanadium redox flow battery (VRFB) to grid connected microgrid energy management. The application of an energy storage system could enhance the economic feasibility of the microgrid. VRFB as a microgrid energy storage system has an advantage of low capital cost. However, the efficiency of VRFB is comparatively lower than other energy storage systems. Characteristics...
This paper proposes single-phase power conditioning system which is capable of connecting a microgrid to an utility grid seamlessly through slew-rate control. The power conditioning system is composed of a single-phase phase-locked loop using an inverse Park transformation to detect the grid phase, a phase synchronizer using the slew-rate control, and isolated bidirectional inverter which transfers...
Energy usage optimization in homes is an important issue because over 30% of the energy consumption of the world occurs in the residential sector. One of key points for home energy management is energy monitoring and control through low-power and low-cost wireless communication. The block-coded group PPM (BC-GPPM) is a scheme with low complexity typically proportional to power and cost because the...
As growing up wireless network based Internet over Thing (IoT) platforms and services, security has been very important issue at wireless data transfer area. This paper introduce security implementation cases and technologies at PhotoVoltaic (PV) monitoring system which is based on the IEEE 802.15.4g Smart Utility Network (SUN). Because PV monitoring system consist of embedded devices which has insufficient...
This paper proposes a closed transition transfer switch (CTTS) based on a photovoltaic inverter which is capable of transition between grid-connected and island modes. The proposed system consists of the CTTS, utility grid and photovoltaic inverter connected to each input, respectively, an active load with power factor correction, and a system controller. According to the grid condition, the system...
This paper proposes a single-phase microgrid based on a power conditioning system with dual photovoltaic array and an energy storage. A grid-connected inverter and battery charger are adopted for energy conversion from the two arrays of different construction. The power conditioning system based on a bidirectional inverter delivers power among grid, load, and storage using the grid-connected mode...
This paper shows an implementation of a smart office energy management system that use Bluetooth Low Energy (BLE) beacons, smart plugs, and a mobile app, which provides the location-aware energy-saving service without user intervention. Moreover, this paper provides a reasonable realtime energy-saving estimation method by which more effective feedback for motivation can be conveyed to the occupant...
This paper describes a smart office energy management system (SOEMS) that can reduce the energy consumption of PCs, monitors, and lights in an office environment through the use of a mobile app and Bluetooth Low Energy based Beacons (BLE Beacons). BLE Beacons placed at several places in an office and a mobile app are used to determine whether a user enters or exits the office to change the power saving...
This paper describes energy application services for energy management technology. To save energy, walking commute and using stairs are considered. Various sensors are used to measure the distance of walking and the saved energy is calculated using the measured data. Using the proposed mechanism, users can easily recognize the saved energy by energy saving action, and result in energy cost saving.
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