scholarly journals A Feasibility Study of Frequency Regulation Energy Storage System Installation in a Power Plant

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5365
Author(s):  
Lateef Onaadepo Ibrahim ◽  
Youl-Moon Sung ◽  
Doosoo Hyun ◽  
Minhan Yoon
Keyword(s):  
Energy Storage ◽  
Power Plant ◽  
Power System ◽  
Short Circuit ◽  
Storage System ◽  
Peak Load ◽  
Load Condition ◽  
Energy Storage System ◽  
Frequency Regulation ◽  
Relay Coordination

The aim of this work is to analyze and stabilize the power system when connecting an energy storage system (ESS) to replace the traditional power reserve of a power plant. Thus, it is necessary to validate and simulate the power facility protection system using a relay coordination approach. The input feasibility of the generator for the frequency regulation (FR) of the operational ESS is also validated through detailed analysis studies including power flow, short circuit and relay coordination analysis. The case scenarios for ESS installation are categorized based on its operation mode and location in the power system. These studies are carried out on the power system at the peak load condition specified for both grids. With the electrical transient analyzer program (ETAP), an analysis is performed to study the implementation of the ESS in a large, integrated power system to determine which location best fits the installation of ESS considering the load flow, short circuit and relay coordination results in each case scenario. Cost evaluation was performed for the choice of locations under study.

scholarly journals Advantages of using a DC power system on board ship

2016 ◽  
Vol 52 (1) ◽  
pp. 83-97 ◽  
Author(s):  
Rene Prenc ◽  
Aleksandar Cuculić ◽  
Ivan Baumgartner
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Short Circuit ◽  
Storage System ◽  
Energy Storage System ◽  
Unity Power Factor ◽  
Dc Power ◽  
Ac Power ◽  
Lower Transmission ◽  
Ship Power System

This article is structured to present an overview of a DC ship power system. The main DC grid configurations will be presented and a difference to the AC system configuration will be highlighted. Compared to the AC power system used on board ships, DC has some obvious benefits which will be explored in this paper. These benefits include: improvement of prime mover efficiency and reduction of fuel costs, weight and space savings, unity power factor operation of generators, lower transmission losses, faster and simpler parallel connection of generators and simpler implementation of energy storage. Finally, some of the challenges introduced with the DC technology will also be explored. These include: high short-circuit currents, DC protection concept and expensive and possibly non-profitable energy storage system solutions.

scholarly journals Characterization of a Fast Battery Energy Storage System for Primary Frequency Response

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3358 ◽  
Author(s):  
Karl Stein ◽  
Moe Tun ◽  
Marc Matsuura ◽  
Richard Rocheleau
Keyword(s):  
Energy Storage ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Peak Load ◽  
Energy Storage System ◽  
Electric Utility ◽  
Frequency Regulation ◽  
Battery Energy Storage ◽  
Utility Company ◽  
Battery Energy

In response to increasing integration of renewable energy sources on electric grid systems, battery energy storage systems (BESSs) are being deployed world-wide to provide grid services, including fast frequency regulation. Without mitigating technologies, such as BESSs, highly variable renewables can cause operational and reliability problems on isolated grids. Prior to the deployment of a BESS, an electric utility company will typically perform modeling to estimate cost benefits and determine grid impacts. While there may be a comparison of grid operations before and after BESS installation, passive monitoring typically does not provide information needed to tune the BESS such that the desired services are maintained, while also minimizing the cycling of the BESS. This paper presents the results of testing from a live grid using a method that systematically characterizes the performance of a BESS. The method is sensitive enough to discern how changes in tuning parameters effect both grid service and the cycling of the BESS. This paper discusses the application of this methodology to a 1 MW BESS regulating the entire island of Hawaii (180 MW peak load) in-situ. Significant mitigation of renewable volatility was demonstrated while minimizing BESS cycling.

scholarly journals Utilization of Energy Storage System for Frequency Regulation in Large-Scale Transmission System

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3898 ◽  
Author(s):  
Minhan Yoon ◽  
Jaehyeong Lee ◽  
Sungyoon Song ◽  
Yeontae Yoo ◽  
Gilsoo Jang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Large Scale ◽  
Storage System ◽  
Energy Storage System ◽  
Rate Of Change ◽  
Frequency Regulation ◽  
Renewable Energy Resources ◽  
Response Characteristics ◽  
Inertia Response

As the penetration rate of renewable enery resources (RES) in the power system increases, uncertainty and variability in system operation increase. The application of energy storage systems (ESS) in the power system has been increased to compensate for the characteristics of renewable energy resources. Since ESS is a controllable and highly responsive power resource, primary frequency response and inertia response are possible in case of system contingency, so it can be utilized for frequency regulation (FR) purposes. In frequency regulation, reduction of the Rate of Change of Frequency (RoCoF) and increase the frequency nadir by improving the response characteristics are important factors to secure frequency stability. Therefore, it is important to control ESS with proper parameters according to changing system situation. In this paper, we propose a method to calculate and apply a frequency droop, which is basically required according to the power system condition based on swing equation and effective inertia assessment. In addition, a method to estimate RoCoF droop according to the correlation with frequency by estimating the systematic inertia in the current situation is proposed. The case study for verification of the proposed method was performed through dynamic simulation using actual Korean power system data. The results show that the proposed method is more effective than the governor-free of the conventional thermal generator and conventional droop control-based FR-ESS.

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