便携式户外消谐器带电短接装置的研制

Development of portable short connection device for outdoor harmonic eliminator

变电站系统容性电流现有测试方法为电压互感器开口三角绕组异频信号注入法,使用该方法测量户外中性点非有效接地系统母线容性电流时,首先需要将母线电压互感器转为检修状态,再采用人工短接的方式将其高压侧中性点所接消谐器退出运行。当系统主接线为单母分段或双母线时,该方法测试所需停电步骤大幅增加,导致测试效率严重降低。针对上述问题,研制了一款便携式户外消谐器带电短接装置,实现在设备不停电状态下测试母线容性电流。该装置的使用,从根本上避免了户外母线容性电流测试过程中频繁的倒闸操作,使测试步骤大幅度降低,极大地提高了现场测试效率,该装置具有广泛的推广价值。

The open delta winding different-frequency signal injection method of the voltage transformer is the current test for the capacitance current of the substation system.When the bus capacitance current of the outdoor neutral point non-effective grounding system was measured by the mentioned method,firstly the bus voltage transformer need transform into maintenance state condition,then the harmonic eliminator connected with the high voltage side neutral point should be out of service by the way of the artificial short.When the main wiring of the system is single bus section or double bus,the test steps will be greatly increased,resulting in a serious decrease in test efficiency.In view of the above problems,a portable outdoor resonance eliminator live short-circuit device was developed to test the capacitance current of the busbar without power failure.The use of this device fundamentally avoids frequent switching operations during the bus capacitance current test,greatly reduces the test steps,and improves the efficiency of on-site testing.The device has extensive promotion value.