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In this paper, the rooftop Solar Photo Voltaic system emphasizes another of source of generation because these can be placed near to the load centers when compared with other non-conventional energy sources of generation. The rooftop Photovoltaic system that is grid connected will support on load and the off grid load with battery backup. The design system should follow that the total utilization...
Generating DC and AC voltage from a single DC input, through single stage conversion is cardinal for nanogrid applications. A boost derived hybrid converter is one of the topology used for nanogrid application, which works well in continuous mode of operation rendering both the dc and ac load simultaneously. Despite of this converters successful performance in continuous conduction mode, undesirable...
This paper brings forward a hybrid converter derived from the Split-Pi converter, which can provide simultaneous ac as well as dc outputs from the same dc input. The proposed converter can work both as a step up and step down converter, whereas most of the available hybrid topologies work in step up mode only. The inbuilt property of shoot through protection in inversion stage, makes this converter...
Commonly used 3-leg inverter interfaces in a microgrid are not capable of maintaining balanced and sinusoidal voltage at their terminals with unbalanced and nonlinear loads. Additional compensating circuits are required to take care of such loads. Simulation and experimental results of 4-leg inverter with nonlinear and unbalanced load justify its use from power quality improvement point of view in...
This report looks into the network challenges that can be observed in simulation of dutch distributuin grid. The analysis has been performed in two different consideration, first considering network as it is currently. Thus, report analyses the relative critical nodes and suggest testing plan for INCREASE Project. Second, four different types of DR programs has been applied to the network. Preliminary...
This work focuses on micro-grid, containing various alternative energy resources (wind and photovoltaic) and super-capacitor energy storage system which performs in stand-alone as well as in grid-connected modes. Various non-isolated converters are used to control the proposed micro-grid. A classical-based supervisory control scheme is designed to perform energy management in order to satisfy the...
The concept of transformerless inverters has become a future trend for single phase photovoltaic grid — tied systems. The major factor to be considered while employing transformerless inverters in such applications is the leakage currents. The lack of transformers in inverters, implemented between PV panel and grid results in a galvanic connection and thus there arises problems due to leakage currents...
This paper proposes a solution to voltage rise and/or sag in single-phase unbalanced distribution systems using photovoltaic (PV) arrays with reactive power capability. The PV is controlled to inject maximum power using Maximum Power Point Tracker (MPPT) to supply local loads when the solar power is available. The reactive power capability of the PV inverters regulates the bus voltages in transient...
One of the value attributes of photovoltaic distributed generation (PV-DG) is the offset of feeder currents which in turn reduces the overall feeder loading. In addition, for remote nodes at the end of the distribution network with high voltage unbalance tendency, PV-DG can be used to reduce this unbalance factor and its associated adverse impacts. This paper discusses the impact of distributed PVs...
This paper presents a suitable output voltage control approach for parallel distributed generation (DG) units working in standalone operating mode. Indeed, an Adaptive Multi Resonant controller with weighted State Feedbacks is optimally designed for the voltage control loop while a Proportional regulator is proposed for the inner current loop. Thankful to its frequency adjusting ability, the proposed...
Nowadays, the increase in nonlinear loads has contributed to the generation of harmonics in the source current which in turn causes low power factor and disturbance in the power system. Active power filters (APFs) are known to provide one of the solutions to this harmonic related issue. Various types and configurations of APFs and control have been reported in literature. This paper proposes the integration...
In this study, an optimized design of a PV-diesel hybrid renewable energy system has been proposed to electrify remote locations in the eastern part of Malaysia, which are located far away from the grid. First, a brief review of energy status in the eastern part of Malaysia has been conducted, and then an illustration of the various electrification plans for remote locations in Sarawak has also been...
Impact of integration of distributed generation (DG) sources on large power networks cannot be studied accurately using computer simulations since building of accurate models of a variety of DG sources and their controls is challenging. Power hardware in the loop (PHIL) simulations help realistic integration studies as they allow interfacing of physical DG systems with well-established power grid...
For clean and economical energy, renewable energy resources are widely used for providing electric supply to the consumers. But renewable resources produce dc supply, so multilevel inverters are required for conversion from dc to ac supply as the output voltage generated by multilevel inverters contain less harmonics as compared to conventional two level inverters. In this paper, a new asymmetrical...
All Solar Farms contain inverter as an essential part of it to convert DC power generated from PV (photo voltaic) modules into AC power. This paper presents a strategy of PV solar farm inverter control as a dynamic reactive power compensator- static synchronous compensator (STATCOM) when large Wind Farm is connected to a feeder and also load at the feeder end changes significantly. Using this control...
If microgrid is connected with main grid, there will be no problem of stability. But after islanding, stability issues occurs. For stability analysis of microgrid the effect of control strategy used in inverters is necessary to study. Load and network parameters also affects on stability of system. The controller of inverter, load and network should sense the signals accurately and quickly because...
This paper proposes a non-linear control strategy to curb for the non-linearities and parameter uncertainties for a grid connected system. Since the conventional techniques performance rely highly on the tuned controller gains prior to grid impedance, its performance deteriorates over time. To incorporate these non-linearities, an adaptive backstepping control strategy has been used subjecting to...
In this paper, Design and development of control circuit algorithm of 3-Φ Voltage Source Inverter (VSI) using Unipolar Sinusoidal Pulse Width Modulation (SPWM) techniques is proposed using STM32F407VGTx discovery board interfaced with MATLAB Simulink Environment. For implementing 3-Φ VSI, this method is most useful as it will eliminate complexity of control circuit algorithm occurred due to analog...
This paper presents Paralleling of inverters with dynamic load sharing. The inverters with lesser power handling capability are paralleled to support the required load instead of going for one inverter with high power handling capability. This reduces the cost of installation and increases reliability of system. In this paper active paralleling technique with VSI inverters is implemented. The RMS...
This paper concentrates on the control of power flow in single stage photovoltaic energy conversion system. The conversion structure has a twofold requirement that consists in ensuring that the current injected to both load and grid obeys to the grid connection standards and sets the DC bus voltage similar to the reference voltage given by the MPPT algorithm. The advanced functions that can be added...
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