H-BRIDGE VSC WITH A T-CONNECTED TRANSFORMER BASED
THREE-PHASE FOUR-WIRE DSTATCOM FOR POWER QUALITY
IMPROVEMENT


I. INTRODUCTION


THE present day ac power distribution systems is
suffering from severe power quality problems. These
power quality problems include high reactive power
burden, harmonics currents, load unbalance, excessive
neutral current etc. . The power quality at the point
of common coupling (PCC) with the utility grid is
governe ....etc

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Power Distribution
 Reactive power
 Apparent power
 Active power
Problems in power distribution
 High Reactive Power Burden
 High harmonic currents
 Unbalanced loads
 Excessive neutral currents
Shunt compensation
Principle of shunt compensation
 Vs = v1+j i1 x/2
 V2 = vr+j i2 x/2
 Ps = I Vs I. I V1 I.sin $/2 /x/2
 PR = I VR I. I V2 I.sin $/2 /x/2
 In mid point, V1= V2
Phasor diagram
Shunt compensators
 Thyristor controlled r ....etc

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This article is presented by:
PENDLI AGAIAH
SUMAN DONTHARABOINA
INTER LINE UNIFIED POWER QUALITY CONDITIONER

ABSRACT

To improve the power quality of two feeders in a distribution system.

INTRODUCTION
It is a new connection for a Unified Power Quality Conditioner (UPQC) .
The device (IUPQC) is connected between two feeders coming from different substations.
It is used for improving the power quality.


FACTORS AFFECTING P ....etc

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Abstract
DSTATCOM (Distribution STATic COMpensator) isused for compensation of reactive power and unbalance caused by II. SYSTEM CONFIGURATIONvarious loads in distribution system. This paper evaluates three Fig. 1 shows the basic circuit diagram of the DSTATCOMdifferent methods of determining the compensating current for a system with lagging power factor loads connected to 3-phase,DSTATCOM. The methods compared, are the instantaneous 3-wire distribution system. The lagging power-factor load isreactive power theory, synchronous referen ....etc

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PRESENTED BY
THUSHARA.K.P


POWER QUALITY ENHANCEMENT BY COMPENSATING CUSTOM POWER DEVICES
INTRODUCTION
 The term power quality refers to maintaining a sinusoidal waveform of bus voltage at rated voltage and frequency.
 Over the last 20 years the number of PQ problems are experienced in industrial and commercial sites are increased dramatically.
 The waveform of electric power at generation stage is purely sinusoidal and free from any distortions. There are many devices the distort the waveform tha ....etc

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Abstract
DSTATCOM (Distribution STATic COMpensator) isused for compensation of reactive power and unbalance caused by II. SYSTEM CONFIGURATIONvarious loads in distribution system. This paper evaluates three Fig. 1 shows the basic circuit diagram of the DSTATCOMdifferent methods of determining the compensating current for a system with lagging power factor loads connected to 3-phase,DSTATCOM. The methods compared, are the instantaneous 3-wire distribution system. The lagging power-factor load isreactive power theory, synchronous referen ....etc

[:=Read Full Message Here=:]

Power Distribution
 Reactive power
 Apparent power
 Active power
Problems in power distribution
 High Reactive Power Burden
 High harmonic currents
 Unbalanced loads
 Excessive neutral currents
Shunt compensation
Principle of shunt compensation
 Vs = v1+j i1 x/2
 V2 = vr+j i2 x/2
 Ps = I Vs I. I V1 I.sin $/2 /x/2
 PR = I VR I. I V2 I.sin $/2 /x/2
 In mid point, V1= V2
Phasor diagram
Shunt compensators
 Thyristor controlled r ....etc

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what is the difference between statcom and D-statcom ....etc

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a. Programmable active power factor improvement scheme for single phase switch mode boost rectifiers
b. SVPWM Techniques and Applications in HTS PMSM Machines Control
c. Space vector pulse width modulation of three level inverter extending operation into over modulation region
d. Impact of Reactive Power in Power Evacuation from Wind Turbines
e. Transient Fault Response of Grid Connected Wind Electric Generators
f. PMSM Speed Sensor less Direct Torque Control Based on EKF
g. Zbus Transmission Network Cost Allocation
h. Electromagn ....etc

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Seminar on
APPLICAION OF ANN CONTROLLER IN A FACTS DEVICE : D-STATCOM

Under the guidance of Presented By
ANIL K.DAHIYA PROFFESOR G.SIVA VIKRAM YADAV
Dept of Electrical Engineering MTECH P.E.D - 208249
National Institute of Technology Kurukshetra Dept of Electrical Engineering,
Haryana-136119, India N.I.T. KUKUKS


Power Quality
The ideal quality of power supply is characterized by electric power energy with perfect sinusoidal waveform at constant frequency of specified constant voltage with least amount of inte ....etc

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Abstract—
In this paper, the method of triangular carrier
switching control of two-level inverters is extended to cascaded
multilevel inverters using phase-shifted multicarrier unipolar
pulsewidth modulation (PWM). The condition for smooth modulation
is obtained using the Bessel’s function representation of
the PWM output and the switching condition of the multilevelinverter-
controlled system. A method is proposed for the determination
of the minimum amplitude of the triangular carrier
for smooth modulation at fixed switch ....etc

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Operation and Control of Single Phase Micro-
Sources in a Utility Connected Grid



Ritwik Majumder, Student Member, IEEE, Arindam Ghosh, Fellow, IEEE,
Gerard Ledwich, Senior Member, IEEE and Firuz Zare, Senior Member, IEEE



ABSTRACT: This paper proposes operation and control of
converter based single phase distributed generators (DG) in a
utility connected grid. A common utility practice is to distribute
the household single-phase loads evenly between the three phases.
The voltage unbalance between ....etc

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Operation and Control of Single Phase Micro-
Sources in a Utility Connected Grid



Ritwik Majumder, Student Member, IEEE, Arindam Ghosh, Fellow, IEEE,
Gerard Ledwich, Senior Member, IEEE and Firuz Zare, Senior Member, IEEE



ABSTRACT: This paper proposes operation and control of
converter based single phase distributed generators (DG) in a
utility connected grid. A common utility practice is to distribute
the household single-phase loads evenly between the three phases.
The voltage unbalance between ....etc

[:=Read Full Message Here=:]