scholarly journals Power Systems, Energy Markets and Renewable Energy Sources in South-Eastern Europe

2016 ◽  
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Eastern Europe ◽  
Renewable Energy Sources ◽  
Energy Markets ◽  
Energy Sources ◽  
South Eastern ◽  
South Eastern Europe

Preface to Special Issue: Renewable Energy in South-Eastern Europe

2013 ◽  
Vol 5 (4) ◽  
pp. 041701
Author(s):  
Viorel Badescu ◽  
Zoran V. Popović ◽  
Laurentiu Fara ◽  
Milorad Bojić
Keyword(s):  
Renewable Energy ◽  
Eastern Europe ◽  
Special Issue ◽  
South Eastern ◽  
South Eastern Europe

scholarly journals An Adaptive Load Frequency Control for Power Systems with Renewable Energy Sources

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 573
Author(s):  
Mohamed Mokhtar ◽  
Mostafa I. Marei ◽  
Mariam A. Sameh ◽  
Mahmoud A. Attia
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
System Performance ◽  
Frequency Control ◽  
Renewable Energy Sources ◽  
Adaptive Controller ◽  
Load Frequency Control ◽  
Energy Sources ◽  
Load Variations

The frequency of power systems is very sensitive to load variations. Additionally, with the increased penetration of renewable energy sources in electrical grids, stabilizing the system frequency becomes more challenging. Therefore, Load Frequency Control (LFC) is used to keep the frequency within its acceptable limits. In this paper, an adaptive controller is proposed to enhance the system performance under load variations. Moreover, the proposed controller overcomes the disturbances resulting from the natural operation of the renewable energy sources such as Wave Energy Conversion System (WECS) and Photovoltaic (PV) system. The superiority of the proposed controller compared to the classical LFC schemes is that it has auto tuned parameters. The validation of the proposed controller is carried out through four case studies. The first case study is dedicated to a two-area LFC system under load variations. The WECS is considered as a disturbance for the second case study. Moreover, to demonstrate the superiority of the proposed controller, the dynamic performance is compared with previous work based on an optimized controller in the third case study. Finally in the fourth case study, a sensitivity analysis is carried out through parameters variations in the nonlinear PV-thermal hybrid system. The novel application of the adaptive controller into the LFC leads to enhance the system performance under disturbance of different sources of renewable energy. Moreover, a robustness test is presented to validate the reliability of the proposed controller.

scholarly journals Converter-driven Stability Analysis of Power Systems Integrated with Hybrid Renewable Energy Sources

2021 ◽  
Author(s):  
Jianqiang Luo ◽  
Yiqing Zou ◽  
Siqi Bu
Keyword(s):  
Renewable Energy ◽  
Stability Analysis ◽  
Power Systems ◽  
Power System ◽  
Dynamic Models ◽  
Renewable Energy Sources ◽  
Energy Sources ◽  
Power Electronic ◽  
Modal Interaction ◽  
Hybrid Renewable Energy

Various renewable energy sources such as wind power and photovoltaic (PV) have been increasingly integrated into the power system through power electronic converters in recent years. However, power electronic converter-driven stability issues under specific circumstances, for instance, modal resonances might deteriorate the dynamic performance of the power systems or even threaten the overall stability. In this paper, the integration impact of a hybrid renewable energy source (HRES) system on modal interaction and converter-driven stability is investigated in an IEEE 16-machine 68-bus power system. Firstly, an HRES system is introduced, which consists of full converter-based wind power generation (FCWG) and full converter-based photovoltaic generation (FCPV). The equivalent dynamic models of FCWG and FCPV are then established, followed by the linearized state-space modeling. On this basis, converter-driven stability analyses are performed to reveal the modal resonance mechanisms of the interconnected power systems and the modal interaction phenomenon. Additionally, time-domain simulations are conducted to verify effectiveness of dynamic models and support the converter-driven stability analysis results. To avoid detrimental modal resonances, an optimization strategy is further proposed by retuning the controller parameters of the HRES system. The overall results demonstrate the modal interaction effect between external AC power system and the HRES system and its various impacts on converter-driven stability.

scholarly journals On Strategic Tasks of the Use of Renewable Energy Sources and the Development of Legal Regulation

2021 ◽  
Vol 4 ◽  
pp. 84-89
Author(s):  
Viktoria V. Romanova ◽  
Keyword(s):  
Renewable Energy ◽  
Power Systems ◽  
Russian Federation ◽  
Renewable Energy Sources ◽  
Legal Regulation ◽  
Power Industry ◽  
Energy Sources ◽  
Technological Basis ◽  
The Russian Federation ◽  
Further Development

The development of the national scientific and technological potential, creation and application of advanced technologies in the power industry, including the technologies related to the use of renewable energy sources, are defined in the Energy Security Doctrine of the Russian Federation as the main tasks of ensuring technological independence and raising competitiveness of the fuel and energy complex. Renewable energy sources and energy storage units are referred to breakthrough technologies that may trigger structural and technological changes in the management and functioning of power systems and facilitate the transition of the power industry to a new technological basis (the so called “energy transition”). The above-mentioned strategic tasks of the further development of the power industry of the Russian Federation require financial support and due legal regulation. The paper brings forward proposals for the further development of the legal regulation of renewable energy sources on the legislative level enabling to fill in the gaps in the current legal regulation.

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