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The grid-connected photovoltaic generation system is the most important one in the field of photovoltaic application. In this paper, a model of photovoltaic has been constructed based on the main circuit of single phase grid-connected generation system using MATLAB/simulink to program it. The double closed loop control structure is adopted and forward-feed compensation method is employed to the system...
The objective of this paper is to demonstrate a fully digital controller for interleaving DC/DC converter. In this paper, a new adaptive control method is proposed to improve the dynamic performance in rapid load current slew rate requirement. This control architecture is according to PID controller with Gain Scheduling architecture and based on pole-zero cancellation method to build the parameters...
The paper reviews new power saving and efficiency regulations applied to server and telecom power supplies. It discusses aspects of system architectures with AC and DC uninterruptible bus on facility level, and then focuses on zero-voltage switching (ZVS), phase-shifted full-bridge DC/DC converter as a good candidate in such applications. The paper describes a new control strategy demonstrating power...
This paper deals with an isolated wind-hydro hybrid generation system employing a Squirrel Cage Induction Generator (SCIG) driven by hydro turbine and a Permanent Magnet Synchronous Generator (PMSG) driven by a variable speed wind turbine feeding three-phase four-wire local loads. The proposed system utilizes two back to back connected Pulse Width Modulated (PWM) Insulated Gate Bipolar Transistors...
From depletion of energy resources and consideration to natural environment, introduction of renewable energy facilities has been increasing annually. Moreover, introduction of photovoltaics has increased on the demand side. However, due to the fluctuating power from renewable energy sources, frequency and voltage fluctuations of power systems become problematic. At the same time, there has been a...
This paper discusses the design of a low tip-speed ratio, drag type vertical axis wind turbine which is incorporated with permanent magnet synchronous generator with maximum power point tracking (MPPT) strategy of control system to acquire the optimal performance. By using two dimensional large eddy simulations (LES) method as fluid dynamic model, the calculated power coefficient for this multi-blade...
In recent years, the increase of non-linear loads in electrical power system has sparked the research in power quality issue. The shunt active power filter (SAPF) is a power electronic device which has been developed to improve power quality. The current control of shunt power filters is critical since poor control can reinforce existing harmonic problems. Various control strategies have been proposed...
We explore the passivity-based control (PBC) for robust UPFC controller design. Under this framework, the dynamical model of UPFC will be represented by a Euler-Lagrangian (EL) system with a set of EL parameters. The energy-dissipative properties of system model are fully retained. The proposed nonlinear UPFC controller consists of two feedback loops. In the inner loop, the so-called passivity controller...
This paper proposes a novel UPFC damping control scheme using fuzzy controllers working on local signals. The design of controller is based on the time-domain analysis of the system transient energy function (TEF) and implemented by using fuzzy controllers to damp low frequency electromechanical power oscillations. The detailed design procedure of fuzzy based damping controllers is firstly addressed...
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