| Electrified railway load with a single-phase, nonlinearity, randomness and volatility can cause supply voltage fluctuations, harmonics, negative sequence and so on, Especially in recent years, a large number of high-speed rail line havebeen operated, the impact on power of high-speed rail load should not be underestimated, It is possible to make the security and reliability of grid operation and other users and railway decreased.This paper analyzes the problem of harmonic power quality, which is generated by highspeed rail load, comprehensive theoretical analysis and simulation of the Kunshan South traction power supply in Shanghai-Nanjing intercity high-speed railway line are done. First, based on the research object as traction load CRH80 models,analyzes its traction drive system and mechanism of harmonic generation, reference to the actual locomotive electrical performance and measured current data, complete simulation and the related verification. Establish the simulation analysis model, including traction load model and power supply system, Under different traction load, Count the size and distortion of each Harmonic currents, Analyze total harmonic voltage distortion, Elaborate harmonic characteristics which are injected by high-speed rail traction load. Currently, traction substations often used passive harmonic compensation, which isthe way of cooperating Single-tuning mode compensation filter and a high pass filter on the feeder, paper carry parametric design according to the harmonic characteristics of high-speed rail load, simulate to verify its compensation effect. |
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