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Microgrids with increased penetration of renewables experience serious challenges due to large frequency excursions under power system disturbances. An energy storage system can provide frequency regulation, but the effectiveness depends on whether it is configured for the grid-forming or grid-following mode of operation. For this purpose, two critical parameters are studied for frequency regulation...
This paper presents a nonlinear control design method for interconnected power systems with induction motors as dynamic loads. To design the controller, a feedback linearization technique is used. The control law is applied through the excitation system of the synchronous generator. The designed controller can provide a stable operation of the systems over a wide range of operating region. In this...
The analysis of distributed generation systems is a very important part of the overall development of future power systems. However, when researchers analyze full scale dynamic behavior of a synchronous generator connected to a distributed generation system, they face many complex tasks such as huge computational time. This paper presents a new modeling approach for distributed generation using Root-Mean-Square...
It is expected that increasing amounts of new generation technologies will be connected to electrical power systems in the near future. Most of these technologies are of considerably smaller scale than conventional synchronous generators and are therefore connected to distribution grids, as the DFIG-based wind farm. When connected in small amounts, the impact of wind farm on power system transient...
This paper presents a tool, which is implemented on the MATLAB/Simulink environment realizing a user friendly GUI system with object oriented configuration, to analyze the dynamical behavior of industrial electrical power system with a customerpsilas gas turbine power plant. A model consisting of a gas turbine system including the steam flow, a synchronous generator with mechanical and electrical...
In this paper, robust stabilizing controllers for the synchronous generator speed, series power flows, voltage magnitude and DC link voltage are designed for a power system with FACTS device (UPFC). To design these controllers, a combined Super-twisting sliding mode (SM) and block control (BC) technique is implemented. The block control approach is used to design linear and nonlinear sliding manifolds...
The objective of this paper to demonstrate the validity of a new concept in dynamic stability enhancement of a synchronous generator connected to the grid via an AC transmission line, using a small power parallel DC link. Superior ability of rapid modulation of power in a DC transmission line is used to damp the oscillations in order to enhance the stability as well as to increase the power transfer...
Nowadays penetration level of distributed generation in type of small synchronous generators is considerable in power systems. Without accounting for uncertainty factor in dynamic parameters of small synchronous generators, stability assessment of these generators in wide-area power system is uncertain and time consuming by itself. So, regarding small generators in medium voltage level, stability...
In this paper, effects of both Thyristor Switched Reactor-based Static VAr Compensator (TSR-based SVC) and Thyristor Controlled Reactor-based Static VAr Compensator (TCR-based SVC), which are two of shunt Flexible AC Transmission Systems (FACTS) devices, on load voltage in a single-machine infinite bus (SMIB) system are investigated. The modeling and simulation of TSR-based SVC and TCR-based SVC are...
This paper discusses the application of a shunt active power filter with energy storage, for voltage and power improvements within a local power supply network (micro-grid) in presence of distributed generation. Theoretical analysis investigates the control the shunt active power filter in response to voltage sag. The shunt active filter operates over a short period of time, and is coordinated with...
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