Reduction of Various Harmonic Resonances in a Power Distribution System by Current Control Method

2020 ◽  
Author(s):  
Sayali Suryawanshi ◽  
S.K. Mahajan
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Control Method ◽  
Current Control ◽  
Power Distribution System

Based on STATCOM in Power Distribution System Design and Simulation

2012 ◽  
Vol 220-223 ◽  
pp. 1249-1253 ◽  
Author(s):  
Qi Chao Zhang
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Control Method ◽  
Effective Means ◽  
Fast Response ◽  
Current Control ◽  
Power Distribution System ◽  
Line Loss ◽  
Node Voltage

The basic role of the STATCOM are continuous and rapid control of reactive power, fast response, issued or absorb reactive power to control the transmission system it is connected to the node voltage, inhibition of harmonic pollution, reduce line loss. The development of STATCOM is to solve the problem of voltage stability and effective means, is the main development direction of DFACTS technology. According to the direct current control method to design compensation device, emphatically introduces the device main circuit design step and process, and use MATLAB software simulation, the feasibility of the design is proved.

A Novel Control Strategy for Three-Phase Four-Wire STATCOM

2012 ◽  
Vol 516-517 ◽  
pp. 1722-1727 ◽  
Author(s):  
Wei Jun Yun ◽  
Gang Yao ◽  
Li Dan Zhou ◽  
Chen Chen ◽  
Jun Min Pan
Keyword(s):  
Control Strategy ◽  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Control Method ◽  
Loop Control ◽  
Power Distribution System ◽  
Imbalance Problem ◽  
Three Phase ◽  
Close Loop Control

Nowadays Static Synchronous Compensator (STATCOM) has gradually become one of the representative techniques in the field of dynamic reactive power compensation in the power distribution system. This paper analyzed the topology and the voltage imbalance problem of the up and down capacitors on DC side of the three-phase four-wire STATCOM. In allusion to the imbalance problem of neutral point, a novel control strategy based on the control of zero-sequence current was proposed. By the triple close-loop control strategy, the STATCOM can achieve great control accuracy and dynamic performance. Simulation result proves that the proposed control method is effective.

scholarly journals Resonance Propagation and Elimination in Integrated and Islanded Microgrids

2018 ◽  
Vol 9 (3) ◽  
pp. 1445
Author(s):  
K. V. Siva Reddy ◽  
SK. Moulali ◽  
K. Harinadha Reddy ◽  
Ch. Rami Reddy ◽  
B. V. RajannaRajanna ◽  
...  
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Control Method ◽  
Short Circuit ◽  
Open Circuit ◽  
Propagation Model ◽  
Power Distribution System ◽  
Micro Grid ◽  
Virtual Impedance ◽  
Resonance Propagation

In this paper, a micro grid resonance propagation model is investigated. To actively mitigate the resonance using DG units, an enhanced DG unit control scheme that uses the concept of virtual impedance is proposed. It can be seen that a conventional voltage-controlled DG unit with an LC filter has a short-circuit feature at the chosen harmonic frequencies, whereas a current-controlled DG unit presents an open-circuit characteristic. The application of underground cables and shunt capacitor banks may introduce power distribution system resonances. This paper additionally focuses on developing a voltage-controlled DG unit-based active harmonic damping technique for grid-connected and islanding micro grid systems. An improved virtual impedance control method with a virtual damping resistor and a nonlinear virtual capacitor is proposed. The nonlinear virtual capacitor is used to compensate the harmonic dip on the grid-side inductor of a DG unit LCL filter. The virtual resistance is principally answerable for micro grid resonance damping. The effectiveness of the proposed damping method is examined using each a single DG unit and multiple parallel DG units<strong>.</strong>

Model predictive current controller for performance enhancement of grid-integrated single-phase photovoltaic distributed generation plants

2016 ◽  
Vol 40 (3) ◽  
pp. 762-775 ◽  
Author(s):  
Aditi Chatterjee ◽  
Kanungobarada Mohanty ◽  
Vinaya Sagar Kommukuri ◽  
Kishor Thakre
Keyword(s):  
Distributed Generation ◽  
Power Distribution ◽  
Distribution System ◽  
Single Phase ◽  
Current Control ◽  
Operating Conditions ◽  
Control Technique ◽  
Voltage Source ◽  
Power Distribution System ◽  
Current Controller

Acknowledgement of renewable sources of energy as substitute energy sources for power production has expanded the number of distributed generation plants being incorporated into the conventional power distribution system. The single-phase voltage source inverter allying the photovoltaic plant with the grid has to address various issues identified with the quality of current injected into the grid, output power factor and power exchange between the plant and the grid. This paper concentrates on the investigation, design and implementation of a digital predictive current control technique known as the model predictive current controller for the control of single-phase photovoltaic distributed generation plants. The performance of the controller is evaluated under varied operating conditions. The proposed current controller is compared with the conventional proportional–integral controller in terms of its design methodology, steady state and dynamic response. The simulation and experimental results validates the effectiveness of the proposed model predictive current controller.

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