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Distributed Static Compensator (DSTATCOM) is a widely used custom power device in distributed network to perform the power quality improvement tasks like harmonics reduction, power factor correction and maintain reduces constant dc bus voltage. This paper investigates a new topology based on a Distributed Static Compensator (DSTATCOM) coupled with a supercapacitor for power quality enhancement. The...
Power Quality Issues are the main challenging issues in a distributed power system due to the integration of renewable energy sources into the grid and huge utilization of semiconductor-based devices. In this paper, a supercapacitor based distributed static compensator (DSTATCOM)is presented to mitigate the power quality problems. The compensator (Supercapacitor based DSTATCOM) mainly focused on harmonics...
Distributed static compensator (DSTATCOM) is an important power device for mitigation of harmonics, power factor correction and voltage regulation in a distributed network. This paper describes the conception and simulation of a three-phase VSC based DSTATCOM for a three phase ac mains feeding to linear and nonlinear loads. The operation of DSTATCOM is governed by a novel control technique known as...
This paper introduces a single-stage active power factor correction (PFC) AC-DC converter which provides almost unity power factor and minimizes the THD to 7.4 %. For a constant DC output voltage a single phase diode bridge rectifier with a large output capacitor is considered in this paper. This standard topology has a shortcoming of introducing lower order harmonics and become cause of poor power...
In this paper, a novel hybrid control approach has been considered which includes an artificial neural network (ANN), a zig-zag transformer and hysteresis current controllers (HCC) for a distributed static compensator (DSTATCOM). The hybrid controller is used for reduction of line current harmonics and for improvement of power factor in the system. The proposed controller pushes the source current...
Due to the increase in load and use of heavy machines in the industries, the demand for multilevel inverter has been increased to a large extent. This paper investigates the effect of increase in Levels from 3 to 33 levels, using a simplified technique in Separate Source Cascaded Multilevel Inverter (CMlI) on the Total Harmonic Distortion (THD) for 1-Phase and 3-Phase Inverter without using any filters,...
This paper exhibits a relative investigation of different governing methods on a shunt active power filter for harmonics and VAR compensation for a balanced three phase system connected to a composite load. Three techniques, namely, instantaneous active and reactive power method, instantaneous active and reactive current control method and unit vector template method are used for the source current...
In past few years, multilevel inverters have shown considerable advantages over traditional two-level inverters in a majority of the high power high voltage and medium voltage industrial applications. As a consequence, the cascaded multilevel inverter (CMI) configuration has grabbed tremendous interest in the power industry. Now-a-days, with the increasing usage of power electronic devices by industrial,...
This paper presents a novel approach for optimal compensation of current harmonics produced due to the presence of nonlinear loads in power systems by the implementation of Active power filter (APF). This is because optimizing the power system networks using conventional mathematical modelling based linearized approaches is quite difficult due to the complex, nonlinear and non-stationary nature of...
Shunt active power filter (APF) has been proven as an effective method to overcome various power quality issues such as reactive power unbalance, unbalanced source currents and large harmonic and neutral currents resulted due to the proliferation of nonlinear loads. Optimizing the performance of APF using conventional mathematical modeling based linearized approaches is quite difficult because of...
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