Kranthi Kumar - Academia.edu (original) (raw)
Papers by Kranthi Kumar
2016 International Conference on Signal Processing, Communication, Power and Embedded System (SCOPES), 2016
Non-linear loads induce harmonics in to the distribution system and causes disturbance in operati... more Non-linear loads induce harmonics in to the distribution system and causes disturbance in operation for other loads connected to the same distribution system. Also, use of fossil fuels creates pollution problems which are not acceptable globally now-a-days. This paper addresses the two mentioned issues utilizing renewable energy source for power generation at distribution level and using APF for harmonic mitigation in distribution system. Integrating renewable energy source generating active power requires a voltage source converter. The voltage source converter acts as an integrating converter and the same converter is used to mitigate harmonics in the distribution system acting as APF. APF is controlled by instantaneous active and reactive power (IARP) theory. PV system is considered in this paper as renewable source for power generation. Results were presented for the proposed work with and without integration of distributed generation for fixed and variable load conditions. The proposed work has been carried out using MATLAB/SIMULINK software.
—Out of various motors BLDC drive is mostly preferred because of its efficiency and high power de... more —Out of various motors BLDC drive is mostly preferred because of its efficiency and high power density now a day's BLDC motor is preformed for low voltage fan application, a 3-phase voltage source inverter is used as electronic commutator connected to the stator winding of the BLDC motor, since the input side requires low voltage dc normally the household fan application single-phase AC is converted into DC to feed the BLDC motor to convert the available single-phase AC supply into low voltage DC we need a DC-DC converter, a SEPIC converter is used for convection into low voltage DC this paper mainly proposes a PV cell integrated SEPIC converter feeding a low voltage BLDC motor. A closed loop speed control for controlling the speed of the motor, Matlab/Simulink based model is developed and simulation results are presented.
Power quality is the major problem in the electrical distribution network, out of various power q... more Power quality is the major problem in the electrical distribution network, out of various power quality problems; harmonics problem is major in distribution network. Various FACTS controllers are proposed for mitigation of power quality problem in the distribution network for harmonic compensation Active power filter is proposed. Another major problem in the power system network is increasing load demand day by day to meet the increasing in load demands renewable energy sources (RES's) are inter connected to the distribution network. For integrating any type of renewable energy sources (RES's) we need a voltage source converter (VSC) one for power quality improvement, another for integration of DG. This work proposes a fuzzy controlled SRF theory based APF with DG integration In the proposed system the fuzzy control circuit will perform the function of harmonic elimination, so that the need for an APF (Active Power Filter). Implementation of a fuzzy logic controller by using voltage as feedback for significantly improving the dynamic performance of proposed APF module with good stability factor is to be achieved. The system of DG integration with APF controlled by Fuzzy is modeled using MATLAB\Simulink. The operating conditions are demonstrated to improve the power quality is simulated using MATLAB/SIMULINK.
Renewable energy sources (RES's) is the major source of electrical energy in future, the availabl... more Renewable energy sources (RES's) is the major source of electrical energy in future, the available renewable energy systems are solar, wind, fuel cell out of these solar system is most popularly used because this source hugely available in nature, this renewable energy source (RES) is most in demand for agricultural, industrial applications. In the agricultural field renewable energy source (RES) is feeding the motor, to have high efficiency for the motor. Motor is design for high voltage, where as to have high efficiency for solar system it is designed for low voltage. SO we need low voltage to high voltage converter. Various high voltage gain dc-dc converters are proposed in the literature out of those hybrid boost converter is chosen because of its simplicity and high voltage gain. This paper mainly proposes the integration of PV system with dc-dc converter and dc-ac inverter feeding an induction motor drive. The converter is controlled on closed loop to maintain output voltage constant. Even inputs sun radiations are varying. A Matlab/ Simulink models are developed for high gain dc-dc converter drive applications.
Wind Farms (WF) employing squirrel cage induction generator (SCIG) directly connected to the grid... more Wind Farms (WF) employing squirrel cage induction generator (SCIG) directly connected to the grid; represent a large percentage of the wind energy conversion systems around the world. In facilities with moderated power generation, the WF is connected through medium voltage (MV) distribution headlines. In this scheme, the power generated is comparable to the transport capacity of the grid. This case is known as Wind Farm to Weak Grid Connection, and its main problem is the poor voltage regulation at the point of common coupling (PCC). Thus, the combination of weak grids, wind power fluctuation and system load changes produce disturbances in the PCC voltage, worsening the Power Quality and WF stability. This situation can be improved using control methods at generator level, or compensation techniques at PCC. In case of wind farms based on SCIG directly connected to the grid, is necessary to employ the last alternative. Custom power devices technology (CUPS) results are very useful for this kind of application. In this paper is proposed a compensation strategy based on a particular CUPS device, the Unified Power Quality Compensator (UPQC). A customized internal control scheme of the UPQC device was developed to regulate the voltage in the WF terminals, and to mitigate voltage fluctuations at grid side. The internal control strategy is based on the management of active and reactive power in the series and shunt converters of the UPQC, and the exchange of power between converters through UPQC DC– Link. This approach increases the compensation capability of the UPQC with respect to other custom strategies that use reactive power only. MATLAB/Simulink ® Simulations results show the effectiveness of the proposed compensation strategy for the enhancement of Power Quality and Wind Farm stability.
2016 International Conference on Signal Processing, Communication, Power and Embedded System (SCOPES), 2016
Non-linear loads induce harmonics in to the distribution system and causes disturbance in operati... more Non-linear loads induce harmonics in to the distribution system and causes disturbance in operation for other loads connected to the same distribution system. Also, use of fossil fuels creates pollution problems which are not acceptable globally now-a-days. This paper addresses the two mentioned issues utilizing renewable energy source for power generation at distribution level and using APF for harmonic mitigation in distribution system. Integrating renewable energy source generating active power requires a voltage source converter. The voltage source converter acts as an integrating converter and the same converter is used to mitigate harmonics in the distribution system acting as APF. APF is controlled by instantaneous active and reactive power (IARP) theory. PV system is considered in this paper as renewable source for power generation. Results were presented for the proposed work with and without integration of distributed generation for fixed and variable load conditions. The proposed work has been carried out using MATLAB/SIMULINK software.
—Out of various motors BLDC drive is mostly preferred because of its efficiency and high power de... more —Out of various motors BLDC drive is mostly preferred because of its efficiency and high power density now a day's BLDC motor is preformed for low voltage fan application, a 3-phase voltage source inverter is used as electronic commutator connected to the stator winding of the BLDC motor, since the input side requires low voltage dc normally the household fan application single-phase AC is converted into DC to feed the BLDC motor to convert the available single-phase AC supply into low voltage DC we need a DC-DC converter, a SEPIC converter is used for convection into low voltage DC this paper mainly proposes a PV cell integrated SEPIC converter feeding a low voltage BLDC motor. A closed loop speed control for controlling the speed of the motor, Matlab/Simulink based model is developed and simulation results are presented.
Power quality is the major problem in the electrical distribution network, out of various power q... more Power quality is the major problem in the electrical distribution network, out of various power quality problems; harmonics problem is major in distribution network. Various FACTS controllers are proposed for mitigation of power quality problem in the distribution network for harmonic compensation Active power filter is proposed. Another major problem in the power system network is increasing load demand day by day to meet the increasing in load demands renewable energy sources (RES's) are inter connected to the distribution network. For integrating any type of renewable energy sources (RES's) we need a voltage source converter (VSC) one for power quality improvement, another for integration of DG. This work proposes a fuzzy controlled SRF theory based APF with DG integration In the proposed system the fuzzy control circuit will perform the function of harmonic elimination, so that the need for an APF (Active Power Filter). Implementation of a fuzzy logic controller by using voltage as feedback for significantly improving the dynamic performance of proposed APF module with good stability factor is to be achieved. The system of DG integration with APF controlled by Fuzzy is modeled using MATLAB\Simulink. The operating conditions are demonstrated to improve the power quality is simulated using MATLAB/SIMULINK.
Renewable energy sources (RES's) is the major source of electrical energy in future, the availabl... more Renewable energy sources (RES's) is the major source of electrical energy in future, the available renewable energy systems are solar, wind, fuel cell out of these solar system is most popularly used because this source hugely available in nature, this renewable energy source (RES) is most in demand for agricultural, industrial applications. In the agricultural field renewable energy source (RES) is feeding the motor, to have high efficiency for the motor. Motor is design for high voltage, where as to have high efficiency for solar system it is designed for low voltage. SO we need low voltage to high voltage converter. Various high voltage gain dc-dc converters are proposed in the literature out of those hybrid boost converter is chosen because of its simplicity and high voltage gain. This paper mainly proposes the integration of PV system with dc-dc converter and dc-ac inverter feeding an induction motor drive. The converter is controlled on closed loop to maintain output voltage constant. Even inputs sun radiations are varying. A Matlab/ Simulink models are developed for high gain dc-dc converter drive applications.
Wind Farms (WF) employing squirrel cage induction generator (SCIG) directly connected to the grid... more Wind Farms (WF) employing squirrel cage induction generator (SCIG) directly connected to the grid; represent a large percentage of the wind energy conversion systems around the world. In facilities with moderated power generation, the WF is connected through medium voltage (MV) distribution headlines. In this scheme, the power generated is comparable to the transport capacity of the grid. This case is known as Wind Farm to Weak Grid Connection, and its main problem is the poor voltage regulation at the point of common coupling (PCC). Thus, the combination of weak grids, wind power fluctuation and system load changes produce disturbances in the PCC voltage, worsening the Power Quality and WF stability. This situation can be improved using control methods at generator level, or compensation techniques at PCC. In case of wind farms based on SCIG directly connected to the grid, is necessary to employ the last alternative. Custom power devices technology (CUPS) results are very useful for this kind of application. In this paper is proposed a compensation strategy based on a particular CUPS device, the Unified Power Quality Compensator (UPQC). A customized internal control scheme of the UPQC device was developed to regulate the voltage in the WF terminals, and to mitigate voltage fluctuations at grid side. The internal control strategy is based on the management of active and reactive power in the series and shunt converters of the UPQC, and the exchange of power between converters through UPQC DC– Link. This approach increases the compensation capability of the UPQC with respect to other custom strategies that use reactive power only. MATLAB/Simulink ® Simulations results show the effectiveness of the proposed compensation strategy for the enhancement of Power Quality and Wind Farm stability.