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随着矿井提升系统、井下绞车、通风系统以及运输系统采用变频器驱动后,煤矿电网出现大量的高次谐波,造成电力系统电压、电流波形畸变,电能质量下降,对电力系统的安全、经济运行产生重大危害。为改善煤矿电力系统的电能质量来保证煤炭生产的正常进行,采用统一电能质量控制器(UPQC)来补偿电网侧的电压、电流畸变。最后利用MATLAB仿真验证了UPQC的补偿效果。
With the mine hoist system, downhole winch, ventilation system and transportation system driven by frequency converter, a large number of high-order harmonics appear in the coal mine power grid, causing the power system voltage and current waveform distortion, power quality decline, power system safety and economy Operation has a significant risk. To improve the power quality of coal mine power system to ensure the normal progress of coal production, a unified power quality controller (UPQC) is used to compensate for voltage and current distortion on the grid side. Finally, using MATLAB simulation to verify the UPQC compensation effect.