Synchrophasors-Assisted IPII-Based Intelligent Relaying for Transmission Lines Including UPFC

2015 ◽  
Vol 16 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Manas Kumar Jena ◽  
S. R. Samantaray
Keyword(s):  
Data Mining ◽  
Decision Tree ◽  
Transmission Lines ◽  
Power Flow ◽  
Unified Power Flow Controller ◽  
Phasor Measurements ◽  
Real Time Digital Simulator ◽  
Mining Model ◽  
Power Flow Controller ◽  
Instantaneous Voltage

Abstract This paper proposes a synchrophasors-assisted intelligent relaying scheme for transmission lines compensated by Unified Power Flow Controller (UPFC). The algorithm uses a new relaying signal termed as imaginary part of integrated impedance (IPII). The synchronized phasor measurements at both ends of the transmission line are used to extract voltage and current phasors from instantaneous voltage and current signals. The voltage and current phasors are utilized to derive IPII of each phase. Further, IPII of each phase is used as input to a data-mining model termed as decision tree (DT) which provides the final relaying decision. The proposed algorithm is validated on real-time digital simulator (RTDS) platform, and the results obtained indicate that the proposed scheme is both dependable and secure in protecting transmission system compensated by UPFC.

Impact of Distributed Power Flow Controller to Improve Line Flow Based on PWM Control with PI Technique

2016 ◽  
Vol 4 (1) ◽  
pp. 57
Author(s):  
Subramani C ◽  
S. S. Dash ◽  
Vimala C ◽  
Uma Mageshwari
Keyword(s):  
Transmission Lines ◽  
Power Flow ◽  
Single Phase ◽  
Unified Power Flow Controller ◽  
Distributed Power ◽  
Flexible Ac Transmission System ◽  
Flow Controller ◽  
Ac Transmission ◽  
Distributed Power Flow ◽  
Power Flow Controller

<p>In this paper we presents a new component within the flexible ac-transmission system (FACTS) family, called Distributed Power-Flow Controller (DPFC). The DPFC is derived from the unified power-flow controller (UPFC). The DPFC can be considered as a UPFC with an eliminated common dc link. The active power exchange between the shunt and series converters, which is through the common dc link in the UPFC, is now through the transmission lines at the third-harmonic frequency. The DPFC employs the distributed FACTS (DFACTS) concept, which is to use multiple small-size single-phase converters instead of the one large-size three-phase series converter in the UPFC. The large number of series converters provides redundancy, thereby increasing the system reliability. As the D-FACTS converters are single-phase and floating with respect to the ground, there is no high-voltage isolation required between the phases. Accordingly, the cost of the DPFC system is lower than the UPFC. The DPFC has the same control capability as the UPFC, which comprises the adjustment of the line impedance, the transmission angle, and the bus voltage. The controller is designed to achieve the most appropriate operating point based on the real power priority.</p>

scholarly journals Performance of Distributed Power Flow Controller in Transmission System based on Fuzzy Logic Controller

2019 ◽  
Vol 8 (3) ◽  
pp. 2039-2043
Keyword(s):  
Transmission Lines ◽  
Power Flow ◽  
Fuzzy Logic Controller ◽  
Reactive Power ◽  
Unified Power Flow Controller ◽  
Distributed Power ◽  
Reactive Power Flow ◽  
Flow Controller ◽  
Distributed Power Flow ◽  
Power Flow Controller

Many of the Power Flow Controlling Devices are mostly used in the Transmission Lines in order to monitor the real as well as reactive power-flow variations. In this work provide an innovative power flow controlling device such as Distributed Power Flow Controller, this device also belongs to the FACTS family. This device is emerged from the Unified Power Flow Controller, there is a small differentiation between both these devices that is the common dc-link. In case of DPFC there is no existence of the dc link which connects both the converters. By design a DPFC device in MATLAB/Simulink to analyze the transmission line parameters

scholarly journals Power Quality Improvement using Three Phase Unified Power Flow Controller (PI-Fuzzy-ANN)

2019 ◽  
Vol 8 (6S2) ◽  
pp. 133-137
Keyword(s):  
Transmission Lines ◽  
Power Flow ◽  
Fuzzy Inference ◽  
Neural System ◽  
Unified Power Flow Controller ◽  
Control Instrument ◽  
Three Phase ◽  
Power Quality Improvement ◽  
The Impact ◽  
Power Flow Controller

Realities gadgets are utilized to control the power stream, to expand the transmission limit and to upgrade the strength of the power framework.. The controller utilized in the control instrument significantly affects controlling the power stream. As indicated by this, the capacity of UPFC is seen by utilizing distinctive control methodologies dependent on PI, fluffy rationale controllers (FLC) and fake neural system controllers in this investigation. Fluffy rationale controller is structured dependent on Mamdani's Fuzzy Inference Method while ANN depends on weighted normal method.This paper investigations the impact of controllers on execution of UPFC on the transmission lines that is liable to control quality aggravations, for example, waveform contortion and DC balance.

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