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This paper present, a grid connected central-type photovoltaic inverter based on the interleaved flyback converter topology. The interleaved flyback converter used to maximize the power level, which can reduce current ripple, reduce the size of the passive component and reduce the overall cost. The existing system the flyback topology used in microinverter at very low power. The main aim of this paper...
The grounding system requires for maintaining safety of operators and apparatus and ensuring reliable working of power network. A grounding of substation connects electrical apparatus and the metallic structures to the common ground. Grounding system of substation should be such that it should limit the potential gradients with in and around substation during normal and fault condition. Ground Fault...
This paper presents a new control strategy for grid integrated PV solar farm so that it can operate as STATCOM, for increasing grid power transfer capacity. Solar plants produce active power during day and are totally inactive in nights. The whole ratings of PV Farm remain inactive during night, which are utilized with the help of voltage and damping control to increase power transfer capacity. The...
As electrical power transformer serve major role in power system, for gradation of voltage level without changing supply frequency. Quite highly expensive component in the electrical network. With the modernization in power electronic controlling devices in the distribution power systems, the deterministic effect of harmonics are major problem at consumer and utility level. Therefore in distribution...
In most industries compressed air is used for running a simple air tool or for complicated tasks such as pneumatic controls. Air power is provided by the air compressor only so it is key equipment to provide air power. one of the big problem associated with compressor system is pressure fluctuation. In order to reduce the energy consumption and obtain safe running, A PLC with touch screen is used...
This paper proposes an eight-switch converter based integrated power conditioner is substitute to conventional nine-switch converter based power conditioner for improving power quality. The nine switch converter has many applications investigated, but as a tradeoff, some limitations in the total attainable amplitude at its output. But it has worked favorably by suitably designed control schemes. The...
The single phase multilevel inverter with a battery balance unit strategy is presented. Every input of inverters which are in system is directly connected to battery. And the output of all batteries that is unification of all batteries voltage can controlled battery voltage to fulfil battery balancing intent. In this topology the inverter is design as well as fulfilled to operate as a battery balancing...
Net metering mechanism provides usages of a bidirectional meter which has facility to record both import and export energy values. In net metering, prime focus is on utilizing self produced electricity by renewable energy sources and excess or surplus is sold to utilities or grid. It results into reduction of electricity bills. Solar photovoltaic system is used significantly in net metering. This...
In this paper we compare various methods to improve the transient stability of wind farm and HVDC. Mainly it considered for fault recovery problem associated with doubly fed induction generator (DFIG) based wind farm and a static synchronous compensator (STATCOM) with high voltage direct current (HVDC) transmission.
The three phase system is undergoing major PQ problems because of various loads present in system and also due to unplanned expansion of the network. Most of AC loads consumes reactive power that result in poor power quality in power system. The paper proposes distribution static compensator for improvement of power quality using PV cell. Dstatcom is used for reducing the reactive power that resulted...
The use of small size wind turbines for electricity generation at house hold level is becoming a trend. Different types of load in houses causes harmonics in that system which affects the performance of that system. Although several researchers had designed methods to overcome this problem but power quality problem still exists. This paper discus a design by using power converters, injecting transformer...
Now a day's power quality is serious problem in power network. To overcome this problem an innovative device D-STATCOM is used. D-STATCOM (distribution static compensator) is facts device used to solve all power quality problems which connected in parallel with system. The main function of D-STATCOM is, it generates or absorbs the reactive power at point of common coupling (PCC), so that power quality...
An switched capacitor multi-level inverter gives higher voltages than the input dc voltage with help of series-parallel conversion operation. In this paper we are finding out from the various methods of multi-level inverters to reduce total harmonic distortion (THD) voltage in bus output of inverter as well as reduction of switching frequency ultimately overall improvement in efficiency of inverter...
The penetration level of wind power plant has increased now a day. Doubly-Fed Induction Generators (DFIG) based wind turbine system has become a more popular because of their advantages over the fixed speed wind turbine. To ensure the power system stabilitya special grid codes provided by several utility to wind farm producers. All these grid code requirements, specifically fault ride through (FRT)...
The Phasor Measurement Unit (PMU) is very important tool for monitoring and control of the power system. PMUs give real time, synchronized measurements of voltages at the buses and also current phase values which are incident to those buses where these PMUs are located. It is unnecessary and impossible to place PMU at each bus to estimate the states because the PMUs and communication facilities are...
The economic dispatch problem deals with minimization of cost of producing electrical power demanded by power system. The penetration of wind power in power systems is increasing worldwide due to environmental constraints and fossil fuel depletion. The main difficulty, however, is accurate prediction of wind power which otherwise may lead to situation in network operation. For more safe and reliable...
In this paper a new optimization technique has been implemented to solve the economic dispatch (ED) problem. A Modified Artificial Bee Colony (MABC) algorithm is applied. A more judicious ED problem formulation considering valve point effect, ramp rate limits and prohibited operating zones utilized. The performance of the method is verified by implementation on three test systems. The overall cost...
The economic load dispatch (ELD) to meet the system load demand in an optimal manner is discussed in this paper by considering wind power in power system. The generation scheduling for overall system comprising coal based units and wind farm is derived by solving an objective function using plant growth simulation algorithm (PGSA). Uncertain nature of wind power is included in study by using weibull...
An economic load dispatch problem (ELD) for power system consisting of thermal generators integrated with wind farm is solved. Wind speed which is essentially a random variable is characterized by weibull probability density function (pdf). Apart from classic economic dispatch term in an objective function, the terms such as direct cost, overestimation and underestimation of available wind power are...
This paper deals with scheduling of thermal generating units in wind integrated power system to meet the requirements of minimum emission. An emission due to thermal plants is considered as constraint while minimizing the overall cost of operation. The stochastic nature of wind power is characterized by weibull probability distribution function. The terms like overestimation and underestimation of...
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