The Function of the Distribution System

566 Words Feb 2nd, 2018 2 Pages
The present work emphasizes the compensation principle and different control strategies used here are based on PI, FUZZY & Neuro-Fuzzy controller of the MC- UPQC in detail. Using MC-UPQC utility side the voltage and current harmonics are compensated caused by non-linear load and to compensate the supply voltage and load current imperfections such as sags, swells, interruptions by using the control algorithm, which is based on the d-q method and p-q Theory are observed. 1.1 POWER QUALITY IN DISTRIBUTION SYSTEM

The term “electric power quality” broadly refers to maintaining a near sinusoidal power distribution bus voltage at rated magnitude and frequency. In addition, the energy supplied to a customer must be uninterrupted from the reliability point of view. It is to be noted that even though power quality (PQ) is mainly a distribution problem, power transmission systems may also have an impact on the quality of power.
These can be divided into two categories.
Natural Causes: Faults or lightning strokes on transmission lines or distribution feeders, falling of trees or branches on distribution feeders during stormy conditions, equipment failure etc.
Due to Load or Transmission Line/Feeder operation: Transformer energization, capacitor or feeder switching, power electronic loads (UPS, ASD,…