谐波对供电系统及其供用电设备的影响

The harmonics bring influences to the power system and the power consuming equipments

谐波对供电系统及其供用电设备的影响主要表现为引起电气设备(电机、变压器和电容器等)附加损耗和发热:使同步发电机的额定输出功率降低,转矩降低,变压器温度升高,效率降低,绝缘加速老化,缩短使用寿命,甚至损坏;降低继电保护、控制、以及检测装置的工作精度和可靠性等。

It is through the following aspects that the harmonics bring influences to the power system and the power consuming equipments in the way of causing appended heat and waste to electric devices （such as motor, transformer, capacitor etc）： make the power output of the synchronous generator decreased, the torque reduced; the temperature of the transformer rises, efficiency is reduced, insulator is spoiled more quickly even more is damaged; reduce the relay protection, control and measure devices working precision and their dependability of etc.