A Refined HVDC Control System

Ekström, Å.; Liss, Gote

doi:10.1109/tpas.1970.292626

Cited by 62 publications

(12 citation statements)

References 3 publications

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“…The thyristors in the converter circuit are commutated with the help of the supply voltage in the rectifying mode of operation and are known as "Line commutated converter". The same circuit while operating in the inverter mode requires load side counter emf for commutation which is referred to as the "Load commutated inverter" [5][6].…”

Section: Introductionmentioning

confidence: 99%

A Paper of Determination of Controlling Characteristics of the Monopolar HVDC System

Roy¹,

Amin²

2014

IJHIT

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Due to cost effectiveness and less electrical fault hazards, the HVDC transmission is more suitable for long distance power transmission than that for the conventional AC transmission system. Moreover the utilization of power electronics has made HVDC technology competitive and reliable in comparison to HVAC system. The controlling mechanism of the DC link (either monopolar or bipolar) is the major concern for HVDC technology. Determination of control loop for system operation needs to commensurate with the conduction period of the semiconductor switching device. Generally IGBT and MOSFET are widely used as switching device whose delay angle, advance angle and extinction angle need to be matched with the controlling mechanism of the converter and inverter section. In this paper, the controlling characteristics of a monopolar HVDC system are determined by using MATLAB/Simulink. The Simpower tool box is used for designing the controlling blocks of the HVDC system. The controlling characteristics of the monopolar HVDC system can be determined from the simulation results of the gate currents of IGBT, output voltages of converter and inverter and modulation index.

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Section: Introductionmentioning

confidence: 99%

A Paper of Determination of Controlling Characteristics of the Monopolar HVDC System

Roy¹,

Amin²

2014

IJHIT

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“…It is possible to take advantage of this unique characteristic of the HVDC link to augment the transient stability of the ac systems. In the past, numerous investigations have been carried out to improve transient stability of power system, ranging from theoretical studies to advanced control devices [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…A proper design of the HVDC controls is essential to ensure satisfactory performance of overall AC/DC system [5][6]. The control strategy, traditionally employed for a two-terminal HVDC transmission system is the current margin method, where the rectifier is in current control, and the inverter is in constant extinction angle (CEA) control [4]. Both ends of the dc system rely on PI controllers to provide fast robust control.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Power System Stability Using Self−Organized Neuro−Fuzzy Based HVDC Controls

Bhookya¹

2013

EPES

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This paper presents an affective neuro -fuzzy controller (NFC) to improve the transient stability of multimachine system with HVDC link. Fuzzy rules are used as neurons in artificial neural network (ANN) model. Excellent learning capability of ANN and heuristic fuzzy rules and input/output membership functions of fuzzy logic technique are optimally tuned from training examples by back propagation algorithm (BPA). Considerable time required for fuzzy inference system to match rules is saved using NFC. To illustrate the performance of NFC, transient stability study is carried out on a multi machine system and results are compared with conventional controller as well as fuzzy logic controller.

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“…The control strategy traditionally employed for a twoterminal HVDC transmission system is the current margin method, whereby the rectifier is in current control (Ekstron and Liiss, 1970). Both ends of the dc system rely on PI controllers to provide a fast control.…”

Section: Introductionmentioning

confidence: 99%

Enhancing the step response curve for rectifier current of HVDC system based on artificial neural network controller

Jabban

Alali

Mansoor

et al. 2012

Journal of King Saud University - Engineering Sciences

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An artificial neural network (ANN) based current controller for a high voltage direct current (HVDC) transmission link, composed of an ANN trained off-line in parallel with a robust PI controller, is described in this paper. Different ANN architectures are investigated for this ANN controller. Comparisons between the responses obtained with the PI and ANN controllers for the rectifier of a HVDC transmission system are made for various system ANN parameters (learning rate and momentum term) contingencies and it is shown that the later has many attractive features.

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A Refined HVDC Control System

Cited by 62 publications

References 3 publications

A Paper of Determination of Controlling Characteristics of the Monopolar HVDC System

A Paper of Determination of Controlling Characteristics of the Monopolar HVDC System

Enhancement of Power System Stability Using Self−Organized Neuro−Fuzzy Based HVDC Controls

Enhancing the step response curve for rectifier current of HVDC system based on artificial neural network controller

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