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This paper proposes a frequency observer based control of a solar energy conversion system (SECS). The proposed control eliminates the DC offset and harmonics current and provides fundamental component of load current. The mathematical analysis of the control is corroborated and discussed in terms of filtering capabilities. Besides, capability of maximum power extraction, it integrates maximum extracted...
The appearance of harmonics in the grid voltage is an issue for the generation systems and grid connected consumers. This paper presents the basic control strategy to be implemented in Synchronous Power Control (SPC) based power converters, which contributes to reduce the harmonic content in the voltage by means of injecting different harmonic current to the grid using a separated virtual admittance...
This study presents a robust estimation control technique of single stage grid connected solar PV (Photovoltaic) energy conversion system with distribution static synchronous compensator (DSTATCOM) capabilities. The estimated perturb and observe (EPO) based maximum power point tracking (MPPT) algorithm is used to obtain crest power from solar PV array under varying atmospheric conditions. The proposed...
In this paper, a self-adaptive resonance frequency tracking method is presented. The resonance frequency tracking is used in a LCL-filter-based active power filter to adapt the frequency of the notch filter applied for active resonance damping. By determining the resonance frequency of the LCL-filter and adapting the notch filter frequency, the bandwidth of the notch filter can be decreased, whereby...
In this paper, a novel supply voltage harmonic mitigation method using a simple DVR without harmonic detection is proposed. In contrast to the conventional DVRs control methods, the proposed method realizes two independent control objectives at fundamental and harmonic frequencies without couplings, with the adoption of the proposed voltage controller with two independent inputs focusing on different...
The shore to ship power (shore power) is an efïective solution to substantially reduces air-pollutant emissions in port area. With the establishment of emission control area of China, to control ship emissions in port. In order to improve frequency stability of shore power and make which is controlled by Power Management System (PMS), this study presents an improved droop control strategy of shore...
Automatic Generation Control (AGC) used in secondary frequency control requires manual tuning to maintain a balance between reaction speed and stability. This task becomes increasingly difficult due to the rising number of inverter-coupled devices and High-Voltage Direct Current (HVDC) links, and the resulting reduction of available inertia. In this paper, we propose a tuningless Load-Frequency Control...
In the distributed generation systems, three-phase inverters are the basement because they are used as power electronics interface between the generators and the grid. Cascaded multi-level H-bridge inverters are widely used for industrial application due to the simple topology and good power quality. However, unbalanced power source problem will easily happen in such an application. In this paper,...
The aim of this paper is to explain a novel technique to improve voltage and frequency profiles on microgrids controlled using the droop control scheme. The method consists on retuning the controller according to the present load scenario by adjusting the droop coefficients in a way that is proportional to the load changes. The proposed technique is tested through numerical simulations and the results...
Periodic signal controllers like repetitive and resonant controllers have demonstrated much potential in the control of power electronic converters, where periodic signals (e.g., ac voltages and currents) can be precisely regulated to follow references. Beyond the control of periodic signals, ac signal processing (e.g., in synchronization and pre-filtering) is also very important for power converter...
The application of energy storage technology in high penetration renewable energy systems are reviewed in this paper. Firstly, the characteristics of power system with high penetration renewable energy are analyzed. Secondly, the research direction and research status of domestic and international energy storage technology in high penetration renewable energy system are introduced. Then the application...
This paper focuses on improving the dynamic behaviour of a microgrid (MG) supplied by a self-excited induction generator (SEIG) when feeding mainly induction motors (IMs) of significant power. In order to sustain the MG during the transitory regime induced by the IMs connection, a short-term energy storage system based on a supercapacitor (SC) is added to the MG control system. Also, a stepped capacitor...
The use of wind turbine as electricity source is growing globally and as consequence the grid codes are becoming more restrict. The restrictions depends on the country that the system is installed and basically limits the system disconnections during determined faults and demands the injection or absorption of active or reactive power during those faults to ensure a fast return of the system to its...
In this paper a comparison between grid-feeding and grid-supporting inverters is shown based on simulation and measurement of inverter output impedances. The output impedance of a grid-feeding inverter with current control shows capacitive behavior compared to inductive behavior of a grid-supporting inverter with voltage control.
Now a days with elevation of Technology, electrical power requirement is grow exponentially rate. So many instruments require quality power for their operation run continuously. The consumer appliances are demand for quality power. But due to some inner components and outer components the quality power distribution is pretentious to consumer's side. Difference in current, voltage and frequency quality...
This paper presents an adaptive back propagation learning scheme for three phase four wire grid integrated solar PV - battery microgrid feeding three phase and single phase nonlinear loads simultaneously. The proposed power quality improved 3 phase 4 wire solar PV - battery micogrid is capable of delivering highly non-sinusoidal currents to nonlinear and unbalance loads of different types such that...
This paper presents the sliding reinforced competitive learning (SR-CL) algorithm for power quality improvement and its implementation for voltage and frequency regulation of diesel engine driven standalone single phase self excited induction generator (SEIG) using digital signal processor (DSP) and a two leg voltage source converter (VSC) bridge. The proposed control algorithm iterates continuously...
This paper presents the operation of a control algorithm that requires only one voltage sensor. The control algorithm can be used in various applications of voltage source converter. For the sake of control algorithm verification, the case of Active Power Filter (APF) is explained here. Operation with a single voltage sensor is accomplished by using the fact that only phase angle or zero crossing...
For more than 30 years, Lebanon has suffered from insufficient electric production. While the world is shifting towards total dependency on renewable energy, Lebanon is still facing the disastrous situation in its electricity sector. This paper suggests a plan of building diesel power plants and engaging them to the public grid. To achieve this, a supervisory control method (SCM) including a frequency...
This paper presents an implementation and control of a hybrid standalone power generating system (HSPGS) based on a wind turbine (WT) and a solar-photovoltaic (PV) array. A squirrel cage induction generator (SCIG) is coupled with a WT for electromechanical energy conversion. The frequency and amplitude of voltage at AC bus, as well as, power quality improvement at the point common coupling (PCC) are...
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