| 过电压是指工频下交流电压均方根值升高 |
| 添加时间：2018/3/26 16:53:29 浏览次数： |
| 过电压是指工频下交流电压均方根值升高，超过额定值的10%，并且持续时间大于1分钟的长时间电压变动现象；过电压的出现通常是负荷投切的结果，例如：切断某一大容量负荷或向电容器组增能（无功补偿过剩导致的过电压）。 Overvoltage refers to AC voltage frequency of RMS value increased, exceeding the rated value of 10%, and lasted for more than 1 minutes long time voltage change phenomenon; over-voltage is usually the result of load switching, for example: cut off a large capacity load or to the capacitor reactive power compensation can increase (excess overvoltage caused). 电力系统在特定条件下所出现的超过工作电压的异常电压升高，属于电力系统中的一种电磁扰动现象。电工设备的绝缘长期耐受着工作电压，同时还必须能够承受一定幅度的过电压，这样才能保证电力系统安全可靠地运行。研究各种过电压的起因，预测其幅值，并采取措施加以限制，是确定电力系统绝缘配合的前提，对于电工设备制造和电力系统运行都具有重要意义。 The rise of the abnormal voltage over the working voltage of the power system under certain conditions is a kind of electromagnetic disturbance in the power system. The insulation of electrical equipment is long enough to withstand the working voltage, and at the same time, it must withstand a certain range of overvoltages, so as to ensure the safe and reliable operation of the power system. Studying the causes of various overvoltages, predicting their amplitudes and taking measures to limit them is the premise for determining the insulation coordination of power systems, and is of great significance for the manufacture of electrical equipment and the operation of power systems. |
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