Fault diagnosis of three-parallel voltage-source converter for a high-power wind turbine

Considering the rapid development of high temperature superconducting (HTS) materials, superconducting power applications have attracted more and more attention in the power industry, particularly for electrical systems including renewable energy. This paper conducts experimental tests on a voltage compensation type active superconducting fault current limiter (SFCL) prototype and explores the SFCL’s application in a permanent-magnet synchronous generator- (PMSG-) based wind turbine system. The SFCL prototype is composed of a three-phase air-core superconducting transformer and a voltage source converter (VSC) integrated with supercapacitor energy storage. According to the commissioning test and the current-limiting test, the SFCL prototype can automatically suppress the fault current and offer a highly controlled compensation voltage in series with the 132 V electrical test system. To expand the application of the active SFCL in a 10 kW class PMSG-based wind turbine system, digital simulations under different fault cases are performed in MATLAB/Simulink. From the demonstrated simulation results, using the active SFCL can help to maintain the power balance, mitigate the voltage-current fluctuation, and improve the wind energy efficiency. The active SFCL can be regarded as a feasible solution to assist the PMSG-based wind turbine system to achieve low-voltage ride-through (LVRT) operation.

Download Full-text

A Fault Diagnosis Method in VSC-HVDC Simulation System Based on BRBP Neural Networks

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.860-863.2269 ◽

2013 ◽

Vol 860-863 ◽

pp. 2269-2274

Author(s):

Hao Yang Cui ◽

Yong Peng Xu ◽

Jun Jie Yang ◽

Jun Dong Zeng ◽

Zhong Tang

Keyword(s):

Neural Networks ◽

Fault Diagnosis ◽

Back Propagation ◽

Voltage Source ◽

Voltage Source Converter ◽

Hvdc System ◽

High Voltage Direct Current ◽

Current Transmission ◽

Diagnosis Method ◽

Dc Current

As the feature of faulty signal in high voltage direct current transmission technology based on voltage source converter (VSC-HVDC) system is complicated to extract and its difficult to carry on the fault diagnosis. On the basis of the PSCAD simulation model of VSC-HVDC system, the DC current faulty signal is analyzed. Then, the wavelet analysis method was adopted to extract the eigenvector of faulty signal, and combined with method of Bayesian regularization back-propagation (BRBP) neural networks, the system fault was identified. The simulation results show that the method is more efficiently and more rapidly than the adding momentum BP neural network on the VSC-HVDC system faults diagnosing.

Download Full-text

Inner phase angle control of voltage source converter in high power applications

PESC '91 Record 22nd Annual IEEE Power Electronics Specialists Conference ◽

10.1109/pesc.1991.162691 ◽

2002 ◽

Cited By ~ 9

Author(s):

L. Angquist ◽

L. Lindberg

Keyword(s):

Phase Angle ◽

High Power ◽

Voltage Source ◽

Voltage Source Converter

Download Full-text

A new control algorithm of voltage source converter systems for medium- and high-power applications

2017 6th International Conference on Clean Electrical Power (ICCEP) ◽

10.1109/iccep.2017.8004752 ◽

2017 ◽

Cited By ~ 1

Author(s):

Y. S. Lo ◽

C. S. Lee ◽

W. S. Wang ◽

K. L. Lian

Keyword(s):

High Power ◽

Control Algorithm ◽

Voltage Source ◽

Voltage Source Converter

Download Full-text

Field-Test of Wind Turbine by Voltage Source Converter

10.5194/wes-2018-37 ◽

2018 ◽

Author(s):

Nicolás Espinoza ◽

Ola Carlson

Keyword(s):

Wind Turbine ◽

Wind Turbines ◽

Design Criterion ◽

Testing Equipment ◽

Voltage Source ◽

Voltage Source Converter ◽

Technical Requirements ◽

Main Challenge ◽

Grid Codes ◽

Wind Energy Development

Abstract. One of the main challenge for the wind energy development is to make the wind turbines efficient in respect of costs while maintaining a safe and reliable operation. An important design criterion is the fulfilment of Grid Codes given by transmission system operators (TSO). The Grid Codes state how wind turbines/farms must behave when connected to the grid in normal and abnormal conditions. In this regard, it is well known that not all the technical requirements can be tested by using the actual impedance-based testing equipment. For this reason, a new type of testing equipment which comprises the use of fully-rated Voltage Source Converter (VSC) in back-to-back configuration is proposed. Thanks to the full controllability of the applied voltage in terms of magnitude, phase and frequency, the use of VSC-based testing equipment, provides more flexibility as compared with actual testing systems. In addition, the AC grid is decoupled from the tested object when performing the test; meaning that the strength of the grid is not a major limitation. Finally, test results of a 4 MW wind turbine and an 8 MW test equipment, located in Gothenburg, Sweden, are shown in order to validate the investigated grid code testing methodology.

Download Full-text

Induction drive system with DSTATCOM based asymmetric twin converter

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v11.i4.pp1826-1834 ◽

2020 ◽

Vol 11 (4) ◽

pp. 1826

Author(s):

P Anusha ◽

B V Rajanna

Keyword(s):

High Power ◽

Harmonic Distortion ◽

Control Technique ◽

Voltage Source ◽

Voltage Source Converter ◽

Switching Frequency ◽

Power Electronics Converters ◽

Drive Control ◽

In Series ◽

Output Module

High power demands are usually met by advanced power electronics converters in several large utility and electric drives applications. Applications from high power drives commonly uses solution based multi pulse and multilevel converters. A common DC link with atleast one voltage source converter (VSC) working with almost fundamental switching frequency are used in converters of multipulse type, and each output module is connected with the multipulse transformer in series. When compared to that of solution with single-VSC, Several VSCs generating different triggering pulses are adjused in order to achieve current injected with low specified total harmonic distortion (THD) with losses of abridged switching. Huge structure in complexity and expensive cost expenditure of the multipulse transformer is the major limitation of this scheme. DC link split capacitors in addition are eliminated by modifying the topology of the circuit. Thus, the independent voltages of the DC capacitor are controlled and decreased in number and the flow of third harmonic current component in the transformer is eliminated. The scheme of the designed controller is depending on the derived mathematical system model. Simulaion observation is used to check the scheme performance and efficiency in a detailed way with drive control technique.

Download Full-text