ZEMCH 2019 International Conference Proceedings April.2020 | Page 427
1. Introduction
Recently, as there is a need for a new concept energy storage system for power supply expansion,
some large consumers are adopting monitoring/control systems for power management, power
demand management, and renewable energy supply in the long run to solve the issue of power
shortage in Korea [1‐3].
When applying a power management system, energy can be saved at levels of least 10 %, and even
up to 30% per year, nationwide, and households to which progressive tariffs are applied can decrease
electricity costs dramatically [3‐5].
However, for small and medium‐sized consumers, accounting for about 50‐60% of the total
electricity demand, it is not practical or feasible to introduce an expensive power management system,
which are tailored for large‐scale users; indeed, it is reported that only 5% of consumers have used a
power management system. Therefore, it is necessary to develop technology for a low‐cost energy
storage system [6].
Accordingly, in this paper, through an analysis of solar power generation patterns in small and
medium sized buildings, an attempt has been made to create an ESS management pattern algorithm.
2. Trends
In Korea, because of supply‐focusing policies, power supply issues occur when the demand for
power increases. The government has established power IT measures to select intelligent power grid
projects and to develop technologies. To enter the overseas market, it is promoting the establishment
of an EMS‐based complex for energy savings in Jeju. Overseas, in addition to introducing and
implementing EMS installation subsidy programs to save energy, power companies support
installation costs and promote measures to curb electricity demand for homes as well as small and
medium‐sized buildings [7‐10].
3. System Design
3.1. ESS Operational Method Design according to Solar Power Generation Pattern
ESS operation, according to photovoltaic power generation patterns, is designed to use ESS energy
when renewable energy generation is impossible and to change to use renewable energy when
renewable energy is available.
When renewable energy cannot be generated and ESS energy is not available, system can
accommodate the power of power supplies (KEPCO or other power exchanges). When renewable
energy is generated while it uses energy of power exchanges, it will change its energy source to
renewable energy.
Figure 1. Power Demand Method Conversion Flowchart
Development of ESS Management Pattern Algorithm for Energy Conservation
through the Amount of Solar photovoltaic Power Generation Estimation
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