scholarly journals Is the Large-Scale Development of Wind-PV with Hydro-Pumped Storage Economically Feasible in Greece?

2021 ◽  
Vol 11 (5) ◽  
pp. 2368
Author(s):  
Anna Dianellou ◽  
Theofanis Christakopoulos ◽  
George Caralis ◽  
Vassiliki Kotroni ◽  
Konstantinos Lagouvardos ◽  
...  
Keyword(s):  
Power System ◽  
Large Scale ◽  
Low Cost ◽  
Potential Contribution ◽  
Gradual Development ◽  
Large Scale Integration ◽  
Pumped Storage ◽  
Steady State Simulation ◽  
Scale Integration ◽  
Pv Generation

The achievement of the long-term national energy targets in Greece for large-scale integration of wind and solar energy may be facilitated by the development of hydro-pumped storage projects. In light of the above, technical aspects related with the operation of the Greek power system and its ability to absorb renewable energy are analyzed in connection with the role of hydro-pumped storage and relative economic aspects. The aim of this work is to assess the potential contribution of hydro-pumped storage projects and estimate the capacity magnitude order to support large-scale wind and photovoltaic (PV) integration in Greece. For this purpose, scenarios for the Greek power system with focus on Wind and PV development, in conjunction with hydro-pumped storage capacity, are developed, and results for current situation and reference years 2030 and 2050 are presented. For the simulation, among others, high resolution mesoscale wind data for a typical year in the whole Greek territory are used for the steady state simulation of the Greek power system, in order to better estimate the power that could be generated from installed wind turbines, taking into consideration technical characteristics of a typical commercial wind turbine. Results indicate the need of gradual development of hydro-pumped storage in parallel with the large-scale integration of wind and PV capacity into the Greek power system. In addition, the feasibility of the examined scenarios is supported from the low cost of wind and PV generation. In the case of Greece, thanks to the complex morphology and hydraulic conditions of the country, hydro-pumped storage composes an efficient and low-cost storage solution.

scholarly journals Flexible Modern Power System: Real-Time Power Balancing through Load and Wind Power

Energies ◽  
2019 ◽  
Vol 12 (9) ◽  
pp. 1710 ◽  
Author(s):  
Abdul Basit ◽  
Tanvir Ahmad ◽  
Asfand Yar Ali ◽  
Kaleem Ullah ◽  
Gussan Mufti ◽  
...  
Keyword(s):  
Power System ◽  
Real Time ◽  
Wind Power ◽  
Power Plants ◽  
Large Scale ◽  
Power Requirement ◽  
Wind Power Plants ◽  
Large Scale Integration ◽  
Flexible Load ◽  
Scale Integration

Increasing large-scale integration of renewables in conventional power system has led to an increase in reserve power requirement owing to the forecasting error. Innovative operating strategies are required for maintaining balance between load and generation in real time, while keeping the reserve power requirement at its minimum. This research work proposes a control strategy for active power balance control without compromising power system security, emphasizing the integration of wind power and flexible load in automatic generation control. Simulations were performed in DIgSILENT for forecasting the modern Danish power system with bulk wind power integration. A high wind day of year 2020 was selected for analysis when wind power plants were contributing 76.7% of the total electricity production. Conventional power plants and power exchange with interconnected power systems utilize an hour-ahead power regulation schedule, while real-time series are used for wind power plants and load demand. Analysis showed that flexible load units along with wind power plants can actively help in reducing real-time power imbalances introduced due to large-scale integration of wind power, thus increasing power system reliability without enhancing the reserve power requirement from conventional power plants.

Low-Temperature Polycrystalline Silicon Thin-Film Transist or Technologies for System-on-Glass Displays

MRS Bulletin ◽  
2002 ◽  
Vol 27 (11) ◽  
pp. 881-886 ◽  
Author(s):  
Shuichi Uchikoga
Keyword(s):  
Thin Film ◽  
Low Temperature ◽  
Polycrystalline Silicon ◽  
Large Scale ◽  
Low Cost ◽  
Silicon Thin Film ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Large Scale Integration ◽  
Scale Integration

AbstractThe elimination of conventional peripheral LSI (large-scale integration) drivers is considered essential to the development of future low-cost, energy-efficient, lightweight, and thin displays. System-on-glass (SOG) displays are a type of display with various functional circuits integrated on a glass substrate. Low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) make the integration of circuits possible because they can be assembled into complex, high-current driver circuits. Furthermore, LTPS TFTs are attracting attention for driving organic light-emitting devices (OLEDs). This article introduces present and future LTPS TFT technologies for SOG displays.

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