Abstract ▼ AI-Helper

The purpose of this paper is to derive the optimal combination of renewable energy and Energy Storage System(ESS) for power system stabilization.
In this study, to solve the problems of the distributed power source including the renewable energy source and to stabilize the power system, the powe...

The purpose of this paper is to derive the optimal combination of renewable energy and Energy Storage System(ESS) for power system stabilization.
In this study, to solve the problems of the distributed power source including the renewable energy source and to stabilize the power system, the power planning models for the power system optimal power configuration that links the renewable energy power source and Energy Storage System(ESS). We analyzed the optimization problem considering economics according to each situation and constraint factors. In addition, for the flexible power structure, various constraints such as load supply and demand, energy usage by each power source, facility capacity in the first year were reviewed and formulated.
Recently, the power system stabilization program has been emerging due to the increase of various new renewable power sources in accordance with the policy of expanding renewable energy. Renewable energy generation has the advantage of using clean energy, but it is difficult to forecast and it is difficult to produce stable electric power, so there is a disadvantage that additional reserve power of capacity corresponding to new renewable energy source is required. Especially, many distributed power sources including new and renewable energy sources connected to power distribution system act as voltage imbalance and frequency fluctuation factors, which may interfere with maintaining stable electric quality.
In order to construct an optimal power portfolio, a case study was carried out through a scenario-specific simulation considering the rate of increase in the construction cost of wind power and solar power generation among renewable power sources. In the meantime, we conducted a mid-to long - term prediction of power generation considering the renewable energy sources while varying the fuel cost inflation rate of the coal-fired power and LNG combined power, which are responsible for the peak load from the base of the power system.
A case study combining wind power and Energy Storage System(ESS) was conducted assuming a system that includes a wind farm and an Energy Storage System(ESS) in a model system similar to a real power system. As a result of comparing the reliability index according to the maximum capacity change of the energy storage device(ESS) according to the capacity of the wind power source in the power system, it was found that an appropriate Energy Storage System(ESS) capacity exists according to the capacity of the wind power source.
Through these results, the composition ratio and power generation characteristics of the Energy Storage System(ESS) were analyzed. It is found that Multi-ESS is more effective than Single-ESS in terms of reliability when each ESS is installed in a wind turbine.
This study has difficulties in deriving detailed results due to limitations of short - term studies. It is expected that more detailed results will be obtained through more continuous and systematic research in the future and contribute to stabilization of power system.

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