Peace Wind Power Quality Evaluation And Management

Wind energy is inexhaustible green energy.It is one of the most promising new energy sources.After rapid development in recent years,China has ranked second in the world in wind power installed capacity.With the continuous expansion of wind power capacity,the impact of wind power on power quality is becoming more and more large,becoming one of the obstacles that restrict the large-scale use of wind power.Power quality is affected by wind turbine operating characteristics and output power,such as voltage deviation,voltage fluctuations,harmonics and flicker.The decline in power quality will not only affect people’s demand for electricity,but also cause great economic losses.Therefore,in order to ensure the safe and stable operation of the power grid.It is necessary to study the power quality of wind farms.With the increasing number of wind farms and grid-connected units,the power quality of the wind farms has an important impact on the quality of wind power equipment and the power quality of wind power access.This paper first analyzes the indicator system of power quality,reasonably selects the indicators of power quality,and the main indicators of the comprehensive assessment of power quality include voltage deviation,voltage fluctuation,flicker,frequency deviation,harmonics,unbalanced three-phase voltage and so on.Then,the comprehensive evaluation of wind power quality.Based on the traditional analytic hierarchy process,the coefficient of variation is introduced to solve the weight coefficient of the objective weighting method.Improve the absolute objectivity of the coefficient of AHP method.Finally,based on the improved analytic hierarchy process(AHP),the gray relational analysis(AHP)is used to carry out weight analysis of wind power quality indicators,and an improved AHP is proposed to provide a more reasonable method for comprehensive evaluation of power quality.Finally,according to the actual reactive power of wind farms,the static var compensator(SVC)is used to adjust the reactive power compensation of the wind farm.Based on this,the SVC pre-test of static var compensator is analyzed.The test results show that the safe operation of SVC in wind farms has better final regulation ability.According to the development of Peace Wind Farm,the specific methods and ideas for the quality management of Peace Wind Farm will be given a better guide to the quality management of wind farms.Therefore,to ensure the safe and stable operation of power grid and wind farm is of great significance.