scholarly journals Future Directions for Power System Interconnection from Korea’s Perspective

2021 ◽  
pp. 48-53
Author(s):  
J. Yoon ◽  
S. Song
Keyword(s):  
Power System ◽  
Energy Security ◽  
Green Energy ◽  
Energy Utilization ◽  
Stable Operation ◽  
Interconnected System ◽  
Future Directions ◽  
System Interconnection ◽  
Term Energy ◽  
Northeast Asian

The power system interconnection between Northeast Asian countries has been discussed since 2000 but has not been realized to date due to various obstacles. This paper specifies the expected future energy policy, long-term energy supply plan, and necessity of power interconnection from the Korean viewpoint, including the climate change agreement. There are very many interconnection scenarios presented by various institutes in NEA countries now. These studies contain the overall preliminary feasibility results but do not consider the environmental effects, energy security, and market reforms. Do these existing studies show how we could interconnect specific countries? This paper discusses the trading potentials for green energy utilization between countries and some obstacles to be removed to promote the energy interconnection projects from technical, economic, marketable, and energy security standpoints. Especially, energy security in terms of politics, as well as vulnerability characteristics of renewable energy, could cause the interconnected system blackouts. These could be a serious obstacle to realization and continuous stable operation of these interconnection projects. Finally, this paper will specify the future directions and possible scenarios for power system interconnection by integrating these issues comprehensively from Korea's perspective.

Switching to Clean Energy: A Milestone for Energy Security and Economic Advantage for Nepal

2018 ◽  
Vol 1 (1) ◽  
pp. 20-23
Author(s):  
Chet Narayan Acharya
Keyword(s):  
Energy Security ◽  
Alternative Energy ◽  
Renewable Energy Sources ◽  
Clean Energy ◽  
Green Energy ◽  
Energy Utilization ◽  
Living Standard ◽  
Energy Sources ◽  
Alternative Energy Sources ◽  
Development Agenda

With the world-wide wave of economic development and improved traditional living standard of people, consumption of fuel has also increased significantly. Exponential growth in use of fossil fuel and its impacts compelled to search for alternative energy sources. Green energy is that source of energy that is naturally restocked. Nepal is rich enough country for renewable energy sources even though, could not accelerate growth and development agenda.  Appropriate policy and planning of green energy would help to give a big push to break development hazards and would contribute for economic freedom and energy security.  This paper attempts to scrutinize and understand the green energy utilization, proper management and exploring the capacity of the Nepalese economy.

Research on Short-Circuit Current of Wind Power System and its Impact on Relay Protection

2014 ◽  
Vol 1070-1072 ◽  
pp. 258-263
Author(s):  
Hua Bo Shi ◽  
Zhi Chen ◽  
Gan Li ◽  
Bo Zhou
Keyword(s):  
Power System ◽  
Wind Power ◽  
Short Circuit ◽  
Relay Protection ◽  
Short Circuit Current ◽  
Green Energy ◽  
Stable Operation ◽  
Technical Problems ◽  
Wind Power System ◽  
The Impact

Wind energy is clean and renewable energy with rich resources. As one of the most promising green energy, wind power has become an important part of the electricity supply. But there are still many technical problems to be solved related to wind power generation and integration, because it may have significant impact on safe and stable operation of the power grid. Therefore, the doubly-fed wind generator and direct-driven permanent-magnet wind power generator are studied. Their models are built in PSCAD/EMTDC for electromagnetic transient simulation, in order to study the characteristics of their short circuit fault current, as well as the impact on the relay protection of the wind power system. The research outcomes provide a reference and basis to wind power failure characteristics research.

scholarly journals Renewables Expansion in Northeast Asian Power Grid

2020 ◽  
Vol 209 ◽  
pp. 04003
Author(s):  
Sergei Podkovalnikov ◽  
Lyudmila Chudinova
Keyword(s):  
Power Systems ◽  
Power System ◽  
Co2 Emission ◽  
Fossil Fuel ◽  
Northeast Asia ◽  
Economic Incentive ◽  
Emission Tax ◽  
The World ◽  
System Interconnection ◽  
Northeast Asian

The paper considers effectiveness of a penetration of renewables into potential Northeast Asia power system interconnection. Renewables are currently in the mainstream of expansion of energy sector in the world and in Northeast Asia, particularly. Formation of NEA power interconnection will increase utilization of variable and poorly predictable renewable generation. Economic incentive for penetration of renewables, like CO2 emission tax, is studied. The study revealed that quite significant tax is needed to be imposed to induce non-fossil fuel generation capacities, including renewable ones, to be added to power systems.

scholarly journals Optimal Placement and Sizing of an Energy Storage System Using a Power Sensitivity Analysis in a Practical Stand-Alone Microgrid

Electronics ◽  
2021 ◽  
Vol 10 (13) ◽  
pp. 1598
Author(s):  
Dongmin Kim ◽  
Kipo Yoon ◽  
Soo Hyoung Lee ◽  
Jung-Wook Park
Keyword(s):  
Sensitivity Analysis ◽  
Energy Storage ◽  
Power System ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Energy Storage System ◽  
Optimization Techniques ◽  
Optimal Placement ◽  
Stable Operation ◽  
Analytical Approaches

The energy storage system (ESS) is developing into a very important element for the stable operation of power systems. An ESS is characterized by rapid control, free charging, and discharging. Because of these characteristics, it can efficiently respond to sudden events that affect the power system and can help to resolve congested lines caused by the excessive output of distributed generators (DGs) using renewable energy sources (RESs). In order to efficiently and economically install new ESSs in the power system, the following two factors must be considered: the optimal installation placements and the optimal sizes of ESSs. Many studies have explored the optimal installation placement and the sizing of ESSs by using analytical approaches, mathematical optimization techniques, and artificial intelligence. This paper presents an algorithm to determine the optimal installation placement and sizing of ESSs for a virtual multi-slack (VMS) operation based on a power sensitivity analysis in a stand-alone microgrid. Through the proposed algorithm, the optimal installation placement can be determined by a simple calculation based on a power sensitivity matrix, and the optimal sizing of the ESS for the determined placement can be obtained at the same time. The algorithm is verified through several case studies in a stand-alone microgrid based on practical power system data. The results of the proposed algorithm show that installing ESSs in the optimal placement could improve the voltage stability of the microgrid. The sizing of the newly installed ESS was also properly determined.

scholarly journals Potential utilization of renewable energy resources for electricity generation in Bosnia and Herzegovina

2005 ◽  
Vol 9 (3) ◽  
pp. 15-23 ◽  
Author(s):  
Fajik Begic ◽  
Anes Kazagic
Keyword(s):  
Renewable Energy ◽  
Power System ◽  
Bosnia And Herzegovina ◽  
Electricity Market ◽  
Renewable Resources ◽  
Electricity Generation ◽  
Power Plants ◽  
Energy Resources ◽  
Energy Utilization ◽  
Renewable Energy Resources

Along with the current processes of restructuring of Energy power system of Bosnia and Herzegovina, liberalization of the electricity market, and modernization of the existing power plants, Bosnia and Herzegovina must turn to the utilization of renewable resources in reason able dynamics as well. Respecting this policy, the initial Valuation of the potential of renewable erg resources in Bosnia and Herzegovina is per formed. The methodology of evaluation of wind energy utilization is presented in this paper, as well as some other aspects of utilization of the renewable energy resources in Bosnia and Herzegovina. Implementation of selected projects should improve sustainability of energy power production in Bosnia and Herzegovina, by reducing the total emission of carbon dioxide originated from energy power system of Bosnia and Herzegovina.

scholarly journals Capacity Market and (the Lack of) New Investments: Evidence from Poland

Energies ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7843
Author(s):  
Przemysław Kaszyński ◽  
Aleksandra Komorowska ◽  
Krzysztof Zamasz ◽  
Grzegorz Kinelski ◽  
Jacek Kamiński
Keyword(s):  
Power Generation ◽  
Energy Security ◽  
Financial Support ◽  
Investment Decisions ◽  
Market Mechanism ◽  
Demand Side ◽  
Capacity Market ◽  
Term Energy ◽  
Demand Side Response

Capacity remuneration mechanisms operate in many European countries. In 2018, Poland implemented a centralized capacity market to ensure appropriate funding for the existing and new power generation units to improve long-term energy security. One of the declarations made while the mechanism was deployed was its beneficial influence on incentives for investments in new units. In this context, this paper aims to analyze the effects of the capacity mechanism adopted for investments in new power generation units that may be financed under the capacity market mechanism in Poland. The analysis is conducted for four types of capacity market units, the existing, refurbishing, planned, and demand-side response types, and includes the final results of capacity auctions. The results prove that the primary beneficiaries of the capacity market in Poland have been the existing units (including the refurbishing ones) responsible for more than 80% of capacity obligation volumes contracted for 2021–2025. Moreover, during the implementation of the capacity market in Poland, the planned units that signed long-term capacity contracts with a total share of 12% of the whole market were already at the advanced phases of construction, and the investment decisions were made long before the implementation of the capacity market mechanism. Therefore, they were not associated with the financial support from the capacity market. The study indicates that the capacity market did not bring incentives for investments in new power generation units in the investigated period.

scholarly journals The North-South Gas Corridor in the Context of Poland’s Gas Transmission System—A Perfect Opportunity to Diversify Gas Resources

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7188
Author(s):  
Wiktor Hebda
Keyword(s):  
Energy Security ◽  
Field Research ◽  
Green Energy ◽  
Coal Production ◽  
The North ◽  
System A ◽  
State Of Affairs ◽  
High Level ◽  
Huge Challenge ◽  
Gas Supply

The energy sector in Poland is currently calling for dynamic redevelopment and cleaner energy. This country is world famous for its high level of coal production, from which it does not want to retreat in the next two decades. For this reason, it is safer to gradually reduce the use of coal while increasing the consumption of gas and simultaneously developing green energy. However, the Polish gas sector is still dependent on Russian gas supplied through the Yamal gas pipeline. Taking into consideration Polish geopolitics, this state of affairs poses a huge challenge and a threat to Poland’s energy security. That is why the concept of the North-South Gas Corridor was introduced. It is intended to be a network of gas pipelines that connect the countries of Central and South Europe to two gas terminals (in Poland and Croatia), which will supply gas from a chosen source. This article presents the current condition of the gas sector in Poland. It focuses on the North-South Gas Corridor project and its impact on the energy security of Poland. An analysis of documents and field research shows that the North-South Gas Corridor provides Poland with an opportunity to diversify the sources and directions of gas supply over the next few years.

scholarly journals An extensive review of energy storage system for the residential renewable energy system

2020 ◽  
Vol 18 (1) ◽  
pp. 242
Author(s):  
M. S. A. Mustaza ◽  
M. A. M. Ariff ◽  
Sofia Najwa Ramli
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Power System ◽  
Storage System ◽  
Energy Condition ◽  
Energy System ◽  
Energy Storage System ◽  
Energy Utilization ◽  
Constant Current ◽  
Battery Management System

Energy storage system (ESS) plays a prominent role in renewable energy (RE) to overcome the intermittent of RE energy condition and improve energy utilization in the power system. However, ESS for residential applications requires specific and different configuration. Hence, this review paper aims to provide information for system builders to decide the best setup configuration of ESS for residential application. In this paper, the aim is to provide an insight into the critical elements of the energy storage technology for residential application. The update on ESS technology, battery chemistry, battery charging, and monitoring system and power inverter technology are reviewed. Then, the operation, the pro, and cons of each variant of these technologies are comprehensively studied. This paper suggested that the ESS for residential ESS requires NMC battery chemistry because it delivers an all-rounded performance as compared to other battery chemistries. The four-stages constant current (FCC) charging technique is recommended because of the fast charging capability and safer than other charging techniques reviewed. Next, the battery management system (BMS) is recommended to adapt in advance machine learning method to estimate the state of charge (SOC), state of health (SOH) and internal temperature (IT) to increase the safety and prolong the lifespan of the batteries. Finally, these recommendations and solutions aimed to improve the utilization of RE energy in power system, especially in residential ESS application and offer the best option that is available on the shelf for the residential ESS application in the future.

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