| 可以起到良好的限制电压互感器铁磁谐振的效果 |
| 添加时间：2019/10/22 15:44:01 浏览次数： |
| 一次消谐器，是安装在6～35kV PT一次绕组Y0接线中性点与地之间的高容量非线性元件，起阻尼与限流的作用。该消谐装置完全符合现行电力部标准DL/T 620—1997《交流电气装置的过电压保护和绝缘配合》第4.1.5 条中的规定，可以起到良好的限制电压互感器铁磁谐振的效果。 The primary harmonic eliminator is a high-capacity non-linear element installed between the neutral point of Y0 connection of primary winding of 6-35kV Pt and the ground, which plays the role of damping and current limiting. The harmonic elimination device fully conforms to the provisions of article 4.1.5 of current Ministry of electric power standard DL / T 620-1997 "overvoltage protection and insulation coordination of AC electrical equipment", which can play a good role in limiting ferroresonance of voltage transformer. 其本质是一种高容量非线性电阻器，起阻尼与限流的作用。可以起到良好的限制电压互感器铁磁谐振的效果。 如果6～35kV电网中性点不接地，母线上Y0接线的PT一次绕组，成为该电网对地唯一金属性通道。电网对地电容通过PT一次绕组有一个充放电的过渡过程。试验测得此时常常有最高幅值达数安培的工频半波涌流通过PT，此电流有可能将PT高压熔丝熔断。而安装了消谐器后，这种涌流将得到有效抑制，高压熔丝不再因为这种涌流而熔断。 Its essence is a kind of high capacity nonlinear resistor, which plays the role of damping and current limiting. It can limit the ferroresonance of voltage transformer. If the neutral point of 6-35kV power grid is not grounded, the primary winding of Pt connected on the bus Y0 becomes the only metallic channel to the ground. There is a transition process of charging and discharging for the grid to ground capacitance through Pt primary winding. The test shows that there is usually a half wave inrush current with the highest amplitude of several amperes passing through Pt, which may fuse the PT high-voltage fuse. After the harmonic eliminator is installed, the inrush current will be effectively suppressed, and the high-voltage fuse will not be fused due to the inrush current. |
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