Power quality measurement and analysis of offshore wind farm based on PSCAD/EMTDC models

The measurement and analysis of power quality for grid-connected offshore wind farm is one of the key issues. This paper attempts to address this technical challenge through a simulation-based study by the use of PSCAD/EMTDC models. We consider an equivalent model with 50MW capacity for offshore wind farm consisting of 10 doubly fed induction generators (DFIGs) to analyze the power quality at the grid-connected point. A set of indices, including voltage unbalance, harmonics, voltage fluctuation and flicker are discussed. Also, the wavelet transform is adopted to analyze the voltage fluctuation and flicker. Based on the findings and the national power quality standard, we suggest some measures to improve the power quality.

[1]  Minxiao Han,et al.  Voltage fluctuation and flicker assessment of a weak system integrated wind farm , 2011, 2011 IEEE Power and Energy Society General Meeting.

[2]  Yuancheng Miao.  The impact of large-scale offshore wind farm on the power system , 2010, CICED 2010 Proceedings.

[3]  Nand Kishor,et al.  Power quality disturbance detection in grid-connected wind energy system using wavelet and S-transform , 2010, 2010 International Conference on Power, Control and Embedded Systems.

[4]  Yu Chen,et al.  Measurement of voltage fluctuation and flicker in electric power system based on wavelet transform , 2007, 2007 International Conference on Wavelet Analysis and Pattern Recognition.

[5]  P. Latha,et al.  Analysis of power quality problems in grid connected wind power plant , 2011, 2011 INTERNATIONAL CONFERENCE ON RECENT ADVANCEMENTS IN ELECTRICAL, ELECTRONICS AND CONTROL ENGINEERING.

[6]  James Yu,et al.  Offshore wind development in China and its future with the existing renewable policy , 2011 .

[7]  A. Testa,et al.  IEEE Recommended Practice— Adoption of IEC 61000-4-15:2010, Electromagnetic compatibility (EMC)—Testing and measurement techniques—Flickermeter— Functional and design specifications , 2011 .

[8]  N. T. Linh.  Power quality investigation of grid connected wind turbines , 2009, 2009 4th IEEE Conference on Industrial Electronics and Applications.

[9]  S. R. Samantaray,et al.  Detection of power quality disturbances in presence of DFIG wind farm using wavelet transform based energy function , 2011, 2011 International Conference on Power and Energy Systems.

[10]  Yao Zhang,et al.  The impact of Nan’ao wind farm integration on power quality of Shantou Power Grid , 2008, 2008 International Conference on Electrical Machines and Systems.

[11]  E. Vilchez,et al.  Wind energy integration into 110 kV system - impact on power quality of MV and LV networks , 2008, 2008 IEEE/PES Transmission and Distribution Conference and Exposition: Latin America.

[12]  Hanshan Li,et al.  Analysis and testing of wind farm power quality in Inner Mongolia , 2011, 2011 International Conference on Electrical and Control Engineering.

[13]  Xiang Yu Lv,et al.  Research on Detection Method of Power Quality for Wind Power Connected to Grid , 2013 .

[14]  A. Abrantes,et al.  Overview of power quality aspects in wind generation , 2012, 2012 North American Power Symposium (NAPS).