Research On Information Detection Technology Of Distribution Network In Gaochun Area With Distributed Photovoltaic Grid Connected

Because the traditional energy shortage,environmental pollution concerns,including solar and other renewable energy has become the traditional fossil energy alternative energy,has been widely used recently Photovoltaic power generation is one of the main ways of scientific and rational utilization of solar energy.With the large-scale access of photovoltaic power grid,in order to system safe and stable operation,it is important to study the real time monitoring and information collection of the power grid.The main research contents of this paper are as follows:(1)A brief analysis of the advantages and disadvantages of distribution network in different communication methods,analyzed the distributed photovoltaic power generation real-time monitoring and information acquisition system design principles,including photovoltaic power station scheduling division principle,monitoring and information acquisition principle,communication principle,data channel principle and equipment screen(cabinet)scheme in principle with the characteristics of distributed photovoltaic power generation.It provides the basis for the design of the monitoring and information collection system.(2)Followed by the analysis of the typical design scheme of small-scale photovoltaic power plants and large and medium-sized PV grid connected power station and includes both the construction scale,an electrical main wiring structure and function demand,secondary equipment configuration and the overall design diagram;based on,combined with Gaochun hotel area photovoltaic power plant the actual situation,gives the real-time monitoring and information acquisition system design examples are given,and the test results show that the information acquisition system is running well,the measurement result is accurate(3)Analysis of the distributed photovoltaic power distribution grid of power quality effects,respectively from the harmonic detecting,DC bias magnetic detection,voltage flash,voltage deviation,frequency deviation of rapid detection method.Then we study the rapid detection method,is proposed for photovoltaic properties of electrical energy quality detection system design,including monitoring system function,performance parameters and detection device.Finally,the paper puts forward the method to improve the quality of electric energy,contains harmonic suppression,improve the voltage and frequency of the scheme.(4)Based on the deep research on the causes and characteristics of the island effect,this method is put forward,which is based on the electric capacity of the two ends of the circuit breaker,and the simulation results are verified.Secondly,the non planned island detection device is developed,and the two ends electrical quantity based on the circuit breaker is used as the criterion for the detection of the isolated island.Then islanding detection device to run,running results show that the at both ends of the breaker electrical quantity of islanding detection method based on correctness.