Download unified power quality conditioner introduction

UNIFIED POWER QUALITY
CONDITIONER
INTRODUCTION
 Unified power quality conditioners (UPQCs) allow the mitigation
of voltage and current disturbances that could affect sensitive
electrical loads while compensating the load reactive power.
 It aims at the integration of series-active and shunt-active power
filters.
 The main purpose of a UPQC is to compensate for voltage
imbalance, reactive power, negative-sequence current and
harmonics.
BLOCK DIAGRAM 1
BLOCK DIAGRAM
SHUNT ACTIVE FILTER
CONTROL STRATEGY
Cont…….
 This theory, also known as instantaneous reactive power theory.
 The p-q theory consists of an algebraic transformation (Clarke
transformation) of the three-phase voltages and currents in the a-bc coordinates to the α-β-0 coordinates, followed by the calculation
of the p-q theory instantaneous power components:
Cont…….
 p0 = v0 ⋅ i0
instantaneous zero-sequence power.
 p = vα ⋅ iα + vβ ⋅ iβ instantaneous real
power
 q = vα ⋅ iβ − vβ ⋅ iα instantaneous imaginary power
 The power components p and q are related to the same α-β
voltages and currents, and can be written together.
 These quantities are illustrated in Fig. 4 for an electrical system
represented in a-b-c coordinates and have the
SO FAR…
Simulation of upqc in matlab
Block description
 GRID
 Filter control block
Filter block
SIMULATION RESULTS
SIMULATION RESULTS
Simulation results
WHAT TO DO………………
 Design and simulation of series active filter.
 Simulation of UPQC.
CONCLUSION
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