scholarly journals Optimization of the power flow of photovoltaic generators in electrical networks by MPPT algorithm and parallel active filters

2021 ◽  
Vol 7 ◽  
pp. 491-505
Author(s):  
Kitmo ◽  
Répélé Djidimbélé ◽  
Dieudonné Kaoga Kidmo ◽  
Guy Bertrand Tchaya ◽  
Noël Djongyang
Keyword(s):  
Power Flow ◽  
Active Filters ◽  
Electrical Networks ◽  
Photovoltaic Generators

scholarly journals Towards more resilient electrical networks in urban areas

2018 ◽  
Vol 61 ◽  
pp. 00015
Author(s):  
Anna Palau-Mayo ◽  
Mikel de Prada ◽  
José Luís Domínguez-García
Keyword(s):  
Urban Areas ◽  
Power Flow ◽  
Renewable Energy Sources ◽  
Decisive Role ◽  
Extreme Weather Events ◽  
Self Healing ◽  
Electrical Networks ◽  
Distribution Grid ◽  
System Operator ◽  
And Control

The requirement of system decarbonisation fixed by the EU 2050 plan is leading to an increased establishment of renewable energy sources. Additionally, the emergence of power electronics and ICT technologies has played a decisive role towards a novel distribution electric grid allowing new monitoring, operation and control. In parallel to the energetic transition, an increasing occurrence of extreme weather events and a reinforced concern on climate change leads to the concept of resilience, which is the capacity to adapt and recover from disruptive events in a coordinated procedure. After a fault event, assuming the objective of the system operator is to minimize the load unsupplied, the present study aims at outlining an early research state on the concept of self-healing through the development of a power flow optimization algorithm within a meshed network. Moreover, the effects of integrating Distributed Energy Resources (DER) in order to increase distribution grid resilience as well as to ensure and secure power supply to the system leads to the clusterization of the power system. With controllable technologies, the on-outaged areas are able to disconnect from the main grid, creating islanded microgrids (MGs) which can work autonomously and consequently, increase grid resilience.

scholarly journals Fault Ride through Capability Analysis (FRT) in Wind Power Plants with Doubly Fed Induction Generators for Smart Grid Technologies

Energies ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 4260 ◽  
Author(s):  
Aphrodis Nduwamungu ◽  
Etienne Ntagwirumugara ◽  
Francis Mulolani ◽  
Waqar Bashir
Keyword(s):  
Power Flow ◽  
Power Plants ◽  
Electrical Networks ◽  
Energy Technologies ◽  
Induction Generators ◽  
Fault Ride Through ◽  
Clearing Time ◽  
Voltage Swell ◽  
Doubly Fed ◽  
Automation Strategies

Faults in electrical networks are among the key factors and sources of network disturbances. Control and automation strategies are among the key fault clearing techniques responsible for the safe operation of the system. Several researchers have revealed various constraints of control and automation strategies such as a slow dynamic response, the inability to switch the network on and off remotely, a high fault clearing time and loss minimization. For a system with wind energy technologies, if the power flow of a wind turbine is perturbed by a fault, the intermediate circuit voltage between the machine side converter and line side converter will rise to unacceptably high values due to the accumulation of energy in the DC link capacitor. To overcome the aforementioned issues, this paper used MATLAB simulations and experiments to analyze and validate the results. The results revealed that fault ride through capability with Supervisory Control and Data Acquisition (SCADA) viewer software, Active Servo software and wind sim packages are more adaptable to the variations of voltage sag, voltage swell and wind speed and avoid loss of synchronism and improve power quality. Furthermore, for protection purposes, a DC chopper and a crowbar should be incorporated into the management of excess energy during faults and a ferrite device included for the reduction of the electromagnetic field.

scholarly journals ON THE SIMULATION OF MODES ОF ELECTRIC POWER SYSTEMS WITH FACTS

2017 ◽  
Vol 60 (4) ◽  
pp. 341-351
Author(s):  
E. D. Halilov
Keyword(s):  
Power Systems ◽  
Power System ◽  
Electric Power ◽  
Power Flow ◽  
Power Transmission ◽  
Electric Power Systems ◽  
Active Power ◽  
Operating Conditions ◽  
Electrical Networks ◽  
Facts Devices

Power flow control is an important task of development of electric power systems. It is necessary to reduce the power loss, improve the reliability and quality of power supply and increase the power transmission. Currently, on the basis of modern power electronics effective FАСТS devices for flexible control of power system operation modes have been developed. FАСТS devices are able to simultaneously influence the voltage, the reactance, the angle between the voltages. As it is known, the calculations of the established modes of electric systems are the most frequently performed tasks at all the territorial and time levels of control and planning operations. These calculations are significant by themselves, being also an integral part of software systems of calculation of losses of power and energy in electrical networks, calculation of optimal modes and also sustainability. The need for multiple mode calculation imposes high requirements to the methods of calculation of the established modes in real time in terms of performance and reliability of the results of the solution being obtained under operating conditions of electric power systems. In traditional calculations of the established modes of electrical networks, shunt reactors, current-limiting reactors, capacitor banks, longitudinal compensation devices were accounted in the simulation as passive elements. In regard with the introduction of FACTS devices in power systems, there is an arising need to develop appropriate algorithms and implement them in the form of software for analyzing and controlling the established modes of power systems. The methodology and software for calculation of the established modes of electric networks with consideration of FACTS devices have been developed. The software makes it possible to obtain practically acceptable solutions in three outer iterations. Based on the results of numerical simulation of modes of the power system of the “Azerenergy” JSC it was determined that the application of FACTS devices can significantly increase the transmission line active power, improve voltage levels and reduce losses of active power. The dependences of flows and power losses on the control parameter of FACTS devices have been derived. 

Optimum Location of Spvg to Enhance Voltage Stability Using Static Techniques

2020 ◽  
Vol 23 (2) ◽  
pp. 49-58
Author(s):  
Melat K. Abdulla ◽  
Lokman H. Hassan
Keyword(s):  
Power Systems ◽  
New England ◽  
Power Flow ◽  
Voltage Stability ◽  
Load Condition ◽  
Vital Role ◽  
Heavy Load ◽  
The Stability ◽  
The Impact ◽  
Photovoltaic Generators

Solar Photovoltaic Generators (SPVGs) play a great and vital role in providing clean and enough energy to meet power loads. However, SPVGs integration on power systems increase power grid problems. It will lead to different problems including disturbance of the grid, instability of the voltage and swings of the power. The impact of SPVG on the voltage stability of the system is studied in this paper. The best location of SPVG is obtained using three static techniques. Power flow and the Q-V curve techniques are used to identify the weakest buses and test the stability of the system under nominal load condition respectively. On other hand, Continuation Power Flow (CPF) and the Q-V curve techniques are used to identify the weakest buses and test the stability of the system under heavy load condition respectively. The proposed techniques are apllied to the New England 39-bus standard system under various loading conditions. The results reveal that choosing a proper location for the SPVG will improve the voltage stability of the system. In addition, connecting the SPVG at the nearest bus to the weakest bus provides better performance than when it connected to the weakest bus.

scholarly journals Optimization of power flow through facts in electrical networks

2020 ◽  
Vol 883 ◽  
pp. 012128
Author(s):  
Sh Khamidov ◽  
B Normuratov ◽  
B Pulatov ◽  
O Kilichov
Keyword(s):  
Power Flow ◽  
Electrical Networks ◽  
Flow Through
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