Arc-suppression coil based on transformer with controlled load

Tian, Jing; Chen, Qianjie; Lu, Cheng; Zhang, Y.

doi:10.1049/iet-epa.2010.0093

Cited by 34 publications

(12 citation statements)

References 10 publications

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“…With the wide application of wind turbines, the impact of wind power fluctuations and the operational characteristics of wind turbines have become increasingly important for grid safety and reliability. Improving the safety, stability, grid-connected characteristics of wind turbines are the most urgent problems to be solved [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Engineering modelling of wind turbine applied in real‐time simulation with hardware‐in‐loop and optimising control

Tian

Liu

Shu

et al. 2018

IET Power Electronics

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In order to constantly improve the output characteristics of wind turbines, the HIL (Hardware In the Loop) experimental platform of wind turbines is built to optimize control. According to the product parameters of 1.5 MW direct-drive PMSG (Permanent Magnet Synchronous wind Generator) of Dongfang Electric Corporation (DEC), the simulation model of wind turbine is built in RTDS (Real Time Digital Simulator), and optimised by comparing with the wind speed-power curve of products, the simulation model of wind turbine with engineering accuracy can be obtained. Base on the engineering model and actual controller of products, the HIL experimental platform of wind turbines is built to optimise control. In the case of unbalanced or asymmetrical grid voltage, in order to make the wind turbine output be stable, the DDSOGI-PLL (direct Decoupling Double Second-Order Generalized Integral Phase-Locked Loop) is proposed to improve the performance of PLL, the active/reactive current decoupling algorithm based on positive and negative sequence voltage orientation respectively is proposed to eliminate the negative sequence current to maintain a constant output power. The effectiveness of algorithm is verified by the HIL experimental platform, the active power output of wind turbine remains constant, the grid-connected adaptability of wind turbines is improved significantly.

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Section: Introductionmentioning

confidence: 99%

Engineering modelling of wind turbine applied in real‐time simulation with hardware‐in‐loop and optimising control

Tian

Liu

Shu

et al. 2018

IET Power Electronics

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“…The variable reactance is widely used in the following field: (i) reactive power compensation field [4][5][6][7][8], in which the equivalent variable reactance can be adjusted between inductive reactance and capacitive reactance; (ii) the arc-suppression coil (ASC) [9][10][11], also known as Petersen coil, is used to compensate the capacitive earth fault currents supplied by outgoing feeders at a substation; (iii) AC induction motor starter [12]; and (iv) various flexible ac transmission system (FACTS) controllers [2,[13][14][15][16][17][18][19], such as APF (active power filter), thyristor controlled series capacitor, unified power flow controller, FCL (fault current limiter), static synchronous series compensator, and interlined power flow controller.…”

Section: Introductionmentioning

confidence: 99%

“…These variable impedances can realise multiple functions by adopting appropriate control strategy. The typical applications are as follows: (i) improve the system stability in multiple parallel grid-tied converters in the light of the impedance-based stability criterion by applying an active impedance [24]; (ii) realise multiple power quality control by combing the above functions of the active reactance and resistance [15]; (iii) the interface control of the grid-tied inverters (as we know, the impedance characteristic of transmission line is predominately inductive in high voltage level and basically resistive in low voltage level, a variable impedance with positive reactance and negative resistance is also needed to realise equivalent droop control); and (iv) the requirement of the neutral grounding in medium-voltage system is changing because of the applications of a growing number of cable in many big cities, in which ASC and low grounding resistance are simultaneously needed in order to satisfy the all-purpose requirement [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Novel four‐quadrant variable impedance and its application

Song

Xue-li³

et al. 2017

IET Power Electronics

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The variable impedance can be applied in many fields of power system. A novel four-quadrant variable impedance based on voltage-sourced inverter control is proposed in the study. The schematic diagram of the novel variable impedance is presented, and its principle and transient characteristic are addressed. The system stability of the variable impedance when it is connected in series with a resistive and inductive load is described. Based on the developed variable impedance, a novel shunt power quality controller (SPQC) is proposed. In the SPQC, the fundamental equivalent impedance of the primary winding is a variable impedance, which can be used to compensate the fundamental reactive power. The equivalent impedance of the primary winding for nth order harmonics is short-circuit impedance, which is very low impedance and the harmonics produced by loads will be short-circuited in primary winding. The control strategy is also analysed. Two sets of single-phase prototypes have been constructed. One is for the demonstration of the variable impedance, the other is for the demonstration of the SPQC. The validity of the novel variable impedance and the SPQC has also been verified through experimental results.

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“…Arc suppression coils (ASCs) are usually installed in the neutral points so that the nonpermanent faults at ground point will be self-extinguished without breaking operations (Zeng et al, 2010;Tian et al, 2010;Sagastabeitia et al, 2011;Burgess and Ahfock, 2011;Gustavsen and Walseth, 2003).…”

Section: Introductionmentioning

confidence: 99%

A multi-valve controlled saturable reactor and its harmonic optimization

Wang

Chen²

2014

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering

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Purpose -As arc suppression coils (ASCs), magnetically controlled reactors (MCRs) are usually operated in the single-phase mode. Due to the lack of a third order harmonic compensation circuit, the current harmonics are high. The purpose of this paper is to propose a novel structure of MCR and a genetic algorithm (GA) to determine the parameters which will result in minimum total harmonics. Design/methodology/approach -This paper proposes the structure and the working principle of the multi-valve controlled saturable reactor (MCSR). There are several sorts of magnetic valves in the iron cores of the MCSR. The saturation degree of each magnetic valve is different when the same direct component of the magnetic flux is generated in the iron core, therefore current harmonics of different phases emerging, i.e. the total harmonics can be reduced. The magnetization characteristics and the mathematical model of the current harmonics of the MCSR are presented by introducing three parameters. The optimal values of the parameters that result in the smallest total harmonic distortion in the output current are calculated by a GA. Findings -The simulation and experimental results are coincident with the theoretical analyses, which prove the effectiveness of the proposed method on harmonic suppression. Practical implications -The method proposed in this paper can successfully reduce the current harmonics of the conventional MCR, including but not limited to the ASC. A prototype MCSR (540 kVA/10 kV) has been designed and constructed. Originality/value -In this paper, a MCSR is proposed. The mathematical model of the MCSR for harmonic analysis is developed. The optimal parameters that result in the smallest THD in the output current are calculated. The mathematical model can be also used for the harmonic analysis of conventional MCRs.

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Arc-suppression coil based on transformer with controlled load

Cited by 34 publications

References 10 publications

Engineering modelling of wind turbine applied in real‐time simulation with hardware‐in‐loop and optimising control

Engineering modelling of wind turbine applied in real‐time simulation with hardware‐in‐loop and optimising control

Novel four‐quadrant variable impedance and its application

A multi-valve controlled saturable reactor and its harmonic optimization

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