Dynamic performance of a unified power flow controller for stabilizing AC transmission systems

2003 ◽  
Author(s):  
H. Fujita ◽  
H. Akagi ◽  
Y. Watanabe
Keyword(s):  
Power Flow ◽  
Dynamic Performance ◽  
Unified Power Flow Controller ◽  
Transmission Systems ◽  
Flow Controller ◽  
Ac Transmission ◽  
Power Flow Controller

scholarly journals Control of a Modular Multilevel Matrix Converter for Unified Power Flow Controller Applications

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 953 ◽  
Author(s):  
Alberto Duran ◽  
Efrain Ibaceta ◽  
Matias Diaz ◽  
Felix Rojas ◽  
Roberto Cardenas ◽  
...  
Keyword(s):  
Power Flow ◽  
Matrix Converter ◽  
Unified Power Flow Controller ◽  
Flexible Ac Transmission Systems ◽  
Transmission Systems ◽  
Feeding Mode ◽  
Flexible Ac Transmission ◽  
Flow Controller ◽  
Ac Transmission ◽  
Power Flow Controller

The modular multilevel matrix converter has been proposed as a suitable option for high power applications such as flexible AC transmission systems. Among flexible AC transmission systems, the unified power flow controller stands out as the most versatile device. However, the application of the modular multilevel matrix converter has not been thoroughly analyzed for unified power flow controller applications due to the sophisticated control systems that are needed when its ports operate at equal frequencies. In this context, this paper presents a cascaded control structure for a modular multilevel matrix converter based unified power flow controller. The control is implemented in a decoupled reference frame, and it features proportional-integral external controllers and internal proportional multi-resonant controllers. Additionally, the input port of the modular multilevel matrix converter is regulated in grid-feeding mode, and the output port is regulated in grid-forming mode to provide power flow compensation. The effectiveness of the proposed vector control system is demonstrated through simulation studies and experimental validation tests conducted with a 27-cell 5 kW prototype.

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>

Stability Improvement in Power Systems Using Unified Power Flow Controller (UPFC)

2013 ◽  
Vol 768 ◽  
pp. 392-397 ◽  
Author(s):  
B. Gopinath ◽  
S. Suresh Kumar ◽  
Juvan Michael
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Short Circuit ◽  
Electric Energy ◽  
System Response ◽  
Unified Power Flow Controller ◽  
Flow Controller ◽  
Ac Transmission ◽  
Power Flow Controller ◽  
Bus System

Flexible AC transmission system (FACTS) is a system composed of static equipments used for ac transmission of electric energy to improve the power transfer capability and to enhance controllability of interconnected network. Unified Power Flow Controller (UPFC) is the most widely used FACTS device for providing fast acting reactive power compensation on high voltage electricity transmission network. This paper deals with the designing of Adaptive Neuro Fuzzy Inference controller (ANFIC) and fuzzy based Particle Swarm Optimization (PSO) controller for the performance analysis of UPFC. The controller have been designed and tested for controlling the real and reactive power of UPFC. Fuzzy-PI controller is used to control the shunt part of UPFC. The system response under high short circuit level is tested on 5-bus system and 118-bus system. Computer simulation by MATLAB/SIMULINK has been used to verify proposed control strategies.

scholarly journals Wavelet based performance analysis of AC transmission systems with unified power flow controller under power quality issues

2019 ◽  
Vol 8 (3) ◽  
pp. 299
Author(s):  
M. Nagaraju ◽  
V. V. K. Reddy ◽  
M. Sushama
Keyword(s):  
Power Quality ◽  
Power Flow ◽  
Reactive Power ◽  
Research Work ◽  
Unified Power Flow Controller ◽  
New Device ◽  
Quality Issues ◽  
Flow Controller ◽  
Ac Transmission ◽  
Power Flow Controller

The developments in power quality are fast and difficult to predict. The majority of power quality issues experienced by industrial customers can be attributed to momentary interruptions, voltage sags or swells, transients, harmonic distortion, electrical noise, and flickering lights, among others. A new device may be invented tomorrow solving power quality problems. The FACTS devices could provide fast control of active and reactive power through a transmission line. The unified power-flow controller (UPFC) is a member of the FACTS family with very attractive features. This device can independently control many parameters, so it is the combination of the properties of a static synchronous compensator (STATCOM) and static synchronous series compensator (SSSC).The performance of AC Transmission system with Unified power flow controller under various power quality problems analysis described. The proposed system is formulated and research work is done by wavelet multi resolution analysis using Bior1.5 mother wavelet with MATLAB/SIMULINK software. It is observed that the effectiveness of AC power transmission through Unified power flow controller under power quality problems of sag, swell, transient, temporary faults and capacitive switching.

scholarly journals Research on AC transmission line fault ride-through control strategy of MMC-based unified power flow controller

2017 ◽  
Vol 2017 (13) ◽  
pp. 1580-1583 ◽  
Author(s):  
Jianqing Tang ◽  
Huan Ma ◽  
Xiaomei Yang ◽  
Xinhe Liu ◽  
Xianwei Wang ◽  
...  
Keyword(s):  
Transmission Line ◽  
Control Strategy ◽  
Power Flow ◽  
Unified Power Flow Controller ◽  
Fault Ride Through ◽  
Flow Controller ◽  
Ac Transmission ◽  
Power Flow Controller
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