scholarly journals Estimating the Cost of Solar Generation Uncertainty and the Impact of Collocated Energy Storage: The Case of Korea

2019 ◽  
Vol 11 (5) ◽  
pp. 1389 ◽  
Author(s):  
Wooyoung Jeon ◽  
Chul-Yong Lee
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Optimal Power Flow ◽  
Greenhouse Gas Emission ◽  
Operating Cost ◽  
Lithium Ion ◽  
Current Level ◽  
Renewable Generation ◽  
The Impact ◽  
Solar Generation

As a major option for reducing greenhouse gas emission and sustainable development, renewable generation is rapidly expanding in the power sector. However, the variability and uncertainty of renewable generation undermine the reliability of the power system, requiring additional reserve capacities. This study estimates the costs induced by additional reserve capacities to reduce the uncertainty of solar generation in the Korean power system and analyzes the effectiveness of the Energy Storage System (ESS) in reducing these costs, using the stochastic form of multi-period security-constraint optimal power flow. To determine the input of stochastic solar generation, an ARMAX model and Monte Carlo method are applied for representative solar farms. The results indicate solar power generation by 2029 would increase the required reserve by 56.2% over the current level but coupling a 10 GWh of lithium-ion ESS would reduce it by 61.1% compared to increased reserve level for 2029. The operating cost reduction (benefit) by ESS would be 80.8% higher in 2029 compared to the current level and cover 89.9% of its installation cost. The benefit of ESS will be improved when (1) offer prices of reserves correctly reflect the true opportunity cost of providing reserve services and (2) more variable renewable energies are deployed.

scholarly journals Nanoscale electrochemical response of lithium-ion cathodes: a combined study using C-AFM and SIMS

2018 ◽  
Vol 9 ◽  
pp. 1623-1628 ◽  
Author(s):  
Jonathan Op de Beeck ◽  
Nouha Labyedh ◽  
Alfonso Sepúlveda ◽  
Valentina Spampinato ◽  
Alexis Franquet ◽  
...  
Keyword(s):  
Energy Storage ◽  
Solid State ◽  
Lithium Ion ◽  
Chemical Information ◽  
Battery Cell ◽  
Individual Layer ◽  
Analysis Techniques ◽  
Starting Point ◽  
Li Ion ◽  
The Impact

The continuous demand for improved performance in energy storage is driving the evolution of Li-ion battery technology toward emerging battery architectures such as 3D all-solid-state microbatteries (ASB). Being based on solid-state ionic processes in thin films, these new energy storage devices require adequate materials analysis techniques to study ionic and electronic phenomena. This is key to facilitate their commercial introduction. For example, in the case of cathode materials, structural, electrical and chemical information must be probed at the nanoscale and in the same area, to identify the ionic processes occurring inside each individual layer and understand the impact on the entire battery cell. In this work, we pursue this objective by using two well established nanoscale analysis techniques namely conductive atomic force microscopy (C-AFM) and secondary ion mass spectrometry (SIMS). We present a platform to study Li-ion composites with nanometer resolution that allows one to sense a multitude of key characteristics including structural, electrical and chemical information. First, we demonstrate the capability of a biased AFM tip to perform field-induced ionic migration in thin (cathode) films and its diagnosis through the observation of the local resistance change. The latter is ascribed to the internal rearrangement of Li-ions under the effect of a strong and localized electric field. Second, the combination of C-AFM and SIMS is used to correlate electrical conductivity and local chemistry in different cathodes for application in ASB. Finally, a promising starting point towards quantitative electrochemical information starting from C-AFM is indicated.

scholarly journals The HTS Cable Under Fault Conditions in a Power System

10.29007/13mm ◽  
2018 ◽  
Author(s):  
Tarun Patel ◽  
Anuradha Deshpande
Keyword(s):  
Power System ◽  
Electric Power ◽  
Current Level ◽  
Fault Current ◽  
Power System Protection ◽  
Power Demand ◽  
System Protection ◽  
Different Types ◽  
Increasing Demand ◽  
The Impact

In today’s world electric power demand is increase steadily. In order to meet this increasing demand superconducting cable can be use instead of conventional AC cable in the power system. The Superconducting cable has some different characteristic than conventional AC cable. If this cable is installed in the power system, then there are some effects introduced on the fault current level. These effects on the fault current level can further have an impact on the power system protection. So there is a need to analyze the impact of a superconducting cable on power system protection and determine its impedance under a fault condition. This paper presents the impacts of the fault current level on a superconducting cable under fault condition in power system. Different types of fault are present in this paper like LG fault, LL fault, LLG fault, LLL fault.

scholarly journals Optimal Sizing and Spatial Allocation of Storage Units in a High-Resolution Power System Model

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3365 ◽  
Author(s):  
Lukas Wienholt ◽  
Ulf Müller ◽  
Julian Bartels
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Power System ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Power Transmission ◽  
Renewable Generation ◽  
Large Power ◽  
Transmission Grid ◽  
Storage Units

The paradigm shift of large power systems to renewable and decentralized generation raises the question of future transmission and flexibility requirements. In this work, the German power system is brought to focus through a power transmission grid model in a high spatial resolution considering the high voltage (110 kV) level. The fundamental questions of location, type, and size of future storage units are addressed through a linear optimal power flow using today’s power grid capacities and a generation portfolio allowing a 66% generation share of renewable energy. The results of the optimization indicate that for reaching a renewable energy generation share of 53% with this set-up, a few central storage units with a relatively low overall additional storage capacity of around 1.6 GW are required. By adding a constraint of achieving a renewable generation share of at least 66%, storage capacities increase to almost eight times the original capacity. A comparison with the German grid development plan, which provided the basis for the power generation data, showed that despite the non-consideration of transmission grid extension, moderate additional storage capacities lead to a feasible power system. However, the achievement of a comparable renewable generation share provokes a significant investment in additional storage capacities.

The Overview of Energy Storage Technology

2014 ◽  
Vol 940 ◽  
pp. 336-338 ◽  
Author(s):  
You Jie Ma ◽  
Hong Kun Lu ◽  
Xue Song Zhou
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Magnetic Energy ◽  
Lithium Ion ◽  
Development Trend ◽  
Super Capacitor ◽  
Advantages And Disadvantages ◽  
Storage Technology ◽  
The Stability ◽  
Battery Technology

Power storage technology serves to cut the peak and fill valley, regulate the power frequency, improve the stability, and raise the utilization coefficient of the grid in the power system. This paper introduces various types of storage technology such as superconducting magnetic energy storage, super capacitor energy storage, sodium sulfur battery, lithium ion, flow battery technology, and discusses their advantages and disadvantages. The development trend and the different applications of storage technology in the power system are also summarized.

Investigating the Impact of Hybrid Energy Storage System on Isolated Power System

2013 ◽  
Vol 397-400 ◽  
pp. 1923-1929
Author(s):  
Xin Zhi Wang ◽  
Li Xia ◽  
Chao Zhang
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Compensation Effect ◽  
Storage System ◽  
Energy Storage System ◽  
System Stability ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System ◽  
The Impact

Based on new ship isolated power system, the models of power station, loads and hybrid energy storage system (HESS) are built. Fuzzy control theory is adopted to control different energy storage modules (ESM) coordinately, effectively level the fluctuation of loads and improve system stability. Simulations in Matlab/Simulink investigate the impact of different control filter parameters on compensation effect of HESS, and the impact of ESMs performance on HESS compensation.

scholarly journals Security constrained optimal power flow in a power system based on energy storage system with high wind penetration

2020 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Hossein Ebrahimi ◽  
Mehdi Abapour ◽  
Behnam Mohammadi-Ivatloo ◽  
Sajjad Golshannavaz
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Storage System ◽  
Energy Storage System ◽  
High Wind ◽  
Optimal Power

scholarly journals Utility Scale Storage: Sleeping Giant or Mirage?

2021 ◽  
Author(s):  
Keyword(s):  
Saudi Arabia ◽  
Energy Storage ◽  
Power System ◽  
Renewable Generation ◽  
Power Sector ◽  
Kingdom Of Saudi Arabia ◽  
Storage Technology ◽  
Energy Storage Technology ◽  
Utility Scale ◽  
High Share

The Kingdom of Saudi Arabia, among other countries, has ambitious plans to install a significant amount of renewable capacity by 2040. A high share of renewable generation in the power system can, however, result in grid instabilities. Energy storage technology is one option that could address these challenges, being an enabler of increased renewable generation in the power sector.

scholarly journals Optimal Allocation of Static Var Compensators in Electric Power Systems

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3219 ◽  
Author(s):  
Martin Ćalasan ◽  
Tatjana Konjić ◽  
Katarina Kecojević ◽  
Lazar Nikitović
Keyword(s):  
Power Systems ◽  
Power System ◽  
Optimal Power Flow ◽  
Optimal Allocation ◽  
Reactive Power ◽  
Dynamic Performance ◽  
Variable Load ◽  
Power Losses ◽  
Facts Devices ◽  
The Impact

In the current age, power systems contain many modern elements, one example being Flexible AC Transmission System (FACTS) devices, which play an important role in enhancing the static and dynamic performance of the systems. However, due to the high costs of FACTS devices, the location, type, and value of the reactive power of these devices must be optimized to maximize their resulting benefits. In this paper, the problem of optimal power flow for the minimization of power losses is considered for a power system with or without a FACTS controller, such as a Static Var Compensator (SVC) device The impact of location and SVC reactive power values on power system losses are considered in power systems with and without the presence of wind power. Furthermore, constant and variable load are considered. The mentioned investigation is realized on both IEEE 9 and IEEE 30 test bus systems. Optimal SVC allocation are performed in program GAMS using CONOPT solver. For constant load data, the obtained results of an optimal SVC allocation and the minimal value of power losses are compared with known solutions from the literature. It is shown that the CONOPT solver is useful for finding the optimal location of SVC devices in a power system with or without the presence of wind energy. The comparison of results obtained using CONOPT solver and four metaheuristic method for minimization of power system losses are also investigated and presented.

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