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The appearance of the power frequency overvoltage in the transmission network

机译:电网中工频过电压的出现

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Highvoltage transmission network in Bosnia and Herzegovina registered significant values of power frequency overvoltages which lasted quite long. This paper identified levels of temporary overvoltages on the basis of measurement results in an annual period during 2010 in specific points of 220 kV and 400 kV network. Measurements were made that exceeded upper voltage limits in relation to referential voltages and their duration for the considered measurement time. In order to indicate the problem of overvoltages in the transmission network additional voltage measurements were made during 2011 in a specific point Mostar 4, on the 440 kV side and in a point Prijedor 2, on the 220 kV side. For specific 220 kV and 400 kV overhead lines overvoltage calculations were made by using ATP-EMTP. Comparison with the measured values indicated good correlation of the measurement results and the calculation. The paper indicates the need for new methods of implementation in order to reduce overvoltages since the existing methods are not sufficient.
机译:波斯尼亚和黑塞哥维那的高压输电网络记录了很长的工频过电压值。本文根据2010年全年220 kV和400 kV电网特定点的测量结果确定了临时过电压的水平。进行的测量在参考的测量时间内超过了相对于参考电压及其持续时间的电压上限。为了指示传输网络中的过电压问题,2011年期间在440 kV侧的Mostar 4点和220 kV侧的Prijedor 2点进行了额外的电压测量。对于特定的220 kV和400 kV架空线,使用ATP-EMTP进行了过电压计算。与测量值的比较表明测量结果与计算具有良好的相关性。本文指出,由于现有方法不足,因此需要新的实施方法以减少过电压。

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