scholarly journals Intelligent Assessment of Active and Reactive Power Flow with Satisfying Accuracy for N - k1 - k2 Cascading Outages

2021 ◽  
Vol 9 (5) ◽  
pp. 986-999
Author(s):  
Yusheng Xue ◽  
Yun Liu
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Cascading Outages ◽  
Active And Reactive Power ◽  
Reactive Power Flow

scholarly journals Real and Reactive Power Control by using 48-pulse Series Connected Three-level NPC Converter for UPFC

2011 ◽  
pp. 1-5
Author(s):  
A. Naveena ◽  
M.Venkateswara Rao
Keyword(s):  
Transmission Line ◽  
Power Flow ◽  
Reactive Power ◽  
System Stability ◽  
Unified Power Flow Controller ◽  
Control Mechanisms ◽  
Active And Reactive Power ◽  
Reactive Power Flow ◽  
Flow Controller ◽  
Power Flow Controller

The equipments based on the power electronics have been improved under the name of Flexible Alternating Current Transmission Systems (FACTS) in the last years. Unified Power Flow Controller (UPFC) is the most widely used FACTS device to control the power flow and to optimize the system stability in the transmission line. UPFC is a FACTS devices that can control active and reactive power flow in transmission line by means of injection controllable series voltage to the transmission line. This paper proposes a new connection for a Unified Power Flow Controller (UPFC) to control the active and reactive power flow control in two sides of a transmission line independently and it regulates bus voltage in the same transmission line, furthermore it is possible to balance line current too. This connection of the UPFC will be called an center node UPFC (C_UPFC). It is one of the newest devices within the FACTS technology. The structure and capability of the C_UPFC is discussed and its control scheme is based on the d-q orthogonal coordinates. According to this, the performance of UPFC for several modes of operations using different control mechanisms based on Proportional-Integral (PI) and PID based controllers has been studied. The obtained simulation results from Matlab/simulink confirm the effective features.

scholarly journals Demodulation of Three-Phase AC Power Transients in the Presence of Harmonic Distortion

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2341
Author(s):  
Benjamin T. Gwynn ◽  
Raymond de Callafon
Keyword(s):  
Power Systems ◽  
Power Flow ◽  
Reactive Power ◽  
Harmonic Distortion ◽  
Transient Effects ◽  
Active And Reactive Power ◽  
Reactive Power Flow ◽  
Ac Power ◽  
Rlc Circuit ◽  
Smart Inverters

Load switches in power systems may cause oscillations in active and reactive power flow. Such oscillations can be damped by synthetic inertia provided by smart inverters providing power from DC sources such as photovoltaic or battery storage. However, AC current provided by inverters is inherently non-sinusoidal, making measurements of active and reactive power subject to harmonic distortion. As a result, transient effects due to load switching can be obscured by harmonic distortion. An RLC circuit serves as a reference load. The oscillation caused by switching in the load presents as a dual-sideband suppressed-carrier signal. The carrier frequency is available via voltage data but the phase is not. Given a group of candidate signals formed from phase voltages, an algorithm based on Costas Loop that can quickly quantify the phase difference between each candidate and carrier (thus identifying the best signal for demodulation) is presented. Algorithm functionality is demonstrated in the presence of inverter-induced distortion.

scholarly journals Grid-tie Three-phase Inverter With Active And Reactive Power Flow Control Capability

2014 ◽  
Vol 19 (4) ◽  
pp. 397-405
Author(s):  
Leonardo Poltronieri Sampaio ◽  
Moacyr Aureliano Gomes de Brito ◽  
Guilherme de Azevedo e Melo ◽  
Carlos Alberto Canesin
Keyword(s):  
Flow Control ◽  
Power Flow ◽  
Reactive Power ◽  
Power Flow Control ◽  
Phase Inverter ◽  
Active And Reactive Power ◽  
Reactive Power Flow ◽  
Three Phase ◽  
Control Capability ◽  
Three Phase Inverter

scholarly journals Power flow control in parallel transmission lines based on UPFC

2020 ◽  
Vol 9 (5) ◽  
pp. 1755-1765
Author(s):  
Mohammed Y. Suliman ◽  
Mahmood T. Al-Khayyat
Keyword(s):  
Power Systems ◽  
Flow Control ◽  
Transmission Lines ◽  
Power Flow ◽  
Reactive Power ◽  
Unified Power Flow Controller ◽  
Parallel Transmission ◽  
Power Flow Control ◽  
Active And Reactive Power ◽  
Reactive Power Flow

The power flow controlled in the electric power network is one of the main factors that affected the modern power systems development. The unified power flow controller (UPFC) is a FACTS powerful device that can control both active and reactive power flow of parallel transmission lines branches. In this paper, modelling and simulation of active and reactive power flow control in parallel transmission lines using UPFC with adaptive neuro-fuzzy logic is proposed. The mathematical model of UPFC in power flow is also proposed. The results show the ability of UPFC to control the flow of powers components "active and reactive power" in the controlled line and thus the overall power regulated between lines.

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