| As a coastal emerging industrial city, with the rapid development of regional economy, rapid growth of all kinds of nonlinear loads, power system harmonics,flicker and other power quality problems are becoming increasingly serious in Yantai power grid. It has been a great threat to the safe and economic operation of regional power system and the daily production and life of the people. Many problems need to be solved.On the basis of fully understanding the principle and relevant standards of power quality as well as the comprehensive inspection and analysis of power quality in Yantai, this paper puts forward a concrete design scheme of power quality data analysis platform, which is suitable for Yantai area, which is based on the system structure plan, selection criteria, network connection scheme, specific functional requirements. In three years, it plans to build a fully covered power quality real-time monitoring, comprehensive analysis platform system, which is extended to the whole are, with a view to comprehensively improve the quality of power quality monitoring and management in Yantai.At the same time, the power quality problem in the power supply area of Dajijia is analyzed, and the damage caused by the power quality problems such as flicker and harmonics is analyzed in detail. Combined with the actual situation, this paper presents the changing Dajijia substation power supply mode resonance isolation source, the transformation of main transformer cooling system adding anti vibration measures to improve equipment performance, in the harmonic source user side mounted filter effectively suppress the harmonic of power quality comprehensive technical scheme.Finally, this paper makes a comprehensive evaluation of the power quality comprehensive control effect of Dajijia station by field test, data comparison, engineering simulation, and so on. |
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