2021 electrician Cup - high speed rail traction power supply system operation data analysis and equivalent modeling ideas + code

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official account ： Linshen alley

China has the longest mileage of electrified railways in the world 、 The models of electric locomotives in service are the most 、 The busiest countries . By 2020 end of the year , The annual electricity consumption of China's railways is about 800 Million kilowatt hour , It accounts for about% of the total annual power generation of the Three Gorges 80%. chart 1 It is the schematic diagram of traction power supply system of high-speed railway , It mainly includes traction substation 、 Traction network and multiple units . The traction substation will 220kV The three-phase voltage is converted to meet the operation of electric locomotive 27.5kV Single phase voltage , Its core component is traction transformer . The traction network consists of feeders 、 Catenary 、 Rail 、 Return line, etc , Complete the power transmission task of electric locomotive . High speed EMUs will consume a lot of electric energy during operation , And its power varies with the operating conditions of the EMU And change , EMU operation will also bring regional grid voltage 、 Current imbalance and harmonic problem , Worsen electricity Energy quality , Bring adverse effects to the operation and control of the power grid . thus , How to deal with the regional electricity with high-speed railway traction load Network power quality evaluation , It is particularly important to formulate energy-saving and consumption reduction strategies and accurately predict the traction load . Regarding this , Please combine the above background knowledge with the relevant measured data provided in the appendix , Solve the following problems .