| 一次消谐阻尼器较适用于JDZJ等型号 |
| 添加时间：2019/9/10 14:58:34 浏览次数： |
| 该装置具有消除TV饱和谐振和限制涌流2种功能,但在应用中存在局限性:①中性点为半绝缘结构,只能直接接地安装的TV无法使用;②只能限制本TV不发生谐振,对电网中的其他TV无效(仅一对一有效;)③当发生单相接地故障时, TV零序电压U0的测量值有误差, The device has two functions: eliminating saturated resonance of TV and limiting inrush current, but there are limitations in its application: 1) the neutral point is semi-insulated structure, and the TV installed directly can not be used; 2) it can only restrict the TV without resonance and is ineffective for other TV in power grid (only one-to-one effect); 3) when single-phase grounding fault occurs, TV zero-sequence electricity There is an error in the measurement of pressure U0. 因此不适宜使用在对U0幅值和角度精度要求较高的场合(如微机接地选线装置);④装置自身的热容量有限,即使选用热容量相对较大的以LXQ型一次消谐阻尼器,在持续时间较长的间歇电弧接地过电压激发下,仍可损坏装置。一次消谐阻尼器较适用于JDZJ等型号中性点全绝缘TV的消谐改造。 Therefore, it is not suitable to use in situations requiring high accuracy of U0 amplitude and angle (such as micro-computer grounding line selection device). Fourthly, the thermal capacity of the device itself is limited. Even if the LXQ primary harmonic elimination damper with relatively large thermal capacity is selected, the device can still be damaged under the excitation of long-lasting intermittent arc grounding overvoltage. The primary harmonic elimination damper is more suitable for the harmonic elimination modification of JDZJ neutral point fully insulated TV. |
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