The Analysis Of The Influence Of Photovoltaic Power Generation Of Harmonics In Distribution Network

In recent years, every country in the world pays more attention to develop the green and renewable energies. Solar energy with its unique advantages is popular in the world. Among them, photovoltaic power generation gets the world’s attention. With the lower price of the photovoltaic component as well as the development of photovoltaic technology, the capacity of the solar photovoltaic power generation system and the efficiency of the transformation equipment conversion increase ceaselessly. Solar photovoltaic system will be regarded as a kind of alternative energy sources in the future rather than an added energy at present. With the building of the intelligent distribution network, people have an increasing demand on the power quality of the low voltage distribution network.Based on this fact, in order to reduce the effects of the photovoltaic power generation system on distribution network, this paper takes the power quality of the photovoltaic powqr system power grid as the research target, and tries to research a harmonic source detecting scheme, which has significance in the grid pollution control. This paper also takes a complete PV grid-connected generation system as the research object, and focuses on the following aspects to make the detailed analysis and simulation studies:Firstly, the paper introduces the distribution network harmonic sources, and according to the dispatching rules, it also gives some detailed grid-connected photovoltaic system requirements. Meanwhile, combined with the fact, the paper elaborates the harmonic effects on distribution networks.Secondly, this paper does a theory analysis of the photovoltaic system solar cell modeling. As the simulation model is established, the writer analysis the output characteristics of the common component of photovoltaic. According to the model, this paper gives a detailed analysis about the mechanism of the influence of the photovoltaic power generation system on the voltage, frequency, and harmonic in the distribution network.Finally, based on the theory of the harmonic source detection, the writer does a detailed analysis of the data on the influence of harmony after the parallel operation of the Hangneng’s6MW photovoltaic system and110kV Yuqiao Substation’s10kV, and meanwhile, the data analysis is validated by simulation.