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城市轨道交通接入系统会对公用电网造成一定的谐波污染,因此有必要对城市轨道交通接入电网后的谐波进行估算及分析。结合石家庄市城市轨道交通1号线工程实际对其接入电网进行了谐波估算,分别给出了主变电所正常运行、单电源及故障运行方式下注入公共连接点谐波电流及在公共连接点产生的谐波电压畸变,并针对故障及检修方式下其注入电网的谐波电流超标现象提出了谐波治理方案建议。
Urban rail transit access system will cause some harmonic pollution to the public power grid, so it is necessary to estimate and analyze the harmonics after the urban rail transit is connected to the power grid. Combined with the actual project of Shijiazhuang Urban Rail Transit Line 1, the harmonics of the access grid were estimated. The normal operation of the main substation, the injection of common connection point harmonic current under single power supply and fault operation mode, The harmonic voltage distortion caused by the connection point is proposed, and the harmonic control scheme suggestion is put forward for the phenomenon that the harmonic current injected into the power grid is over-regulated under the fault and maintenance mode.