
消弧线圈补偿成套装置作用,接地变压器作用,系统接地电容电流大怎么解决,安装消弧线圈成套装置可以消除系统接地电容电流。
The function of the complete set of arc suppression coil compensation device, the function of the grounding transformer, and how to solve the problem of high system grounding capacitance current. Installing the complete set of arc suppression coil device can eliminate the system grounding capacitance current.
对于不同电压等级的电力系统,其中性点的接地方式是不同的,根据我国国情,我国6~66KV配电系统中主要采用小电流接地运行方式。为了有效防止系统弧光接地,消除接地故障,提高供电质量,按照国家对过电压保护设计规范新规程规定,电网电容电流超过10A时,均应安装消弧线圈装置。由于中性点经消弧线圈接地的电力系统接地电流小,其对附近的通信干扰小也是这种接地方式的一个优点。
For power systems with different voltage levels, the grounding method for neutral points is different. According to China's national conditions, the small current grounding operation mode is mainly used in the 6-66KV distribution system in China. In order to effectively prevent system arc grounding, eliminate grounding faults, and improve power supply quality, according to the new regulations of the national overvoltage protection design standards, arc suppression coil devices should be installed when the grid capacitance current exceeds 10A. One advantage of this grounding method is that the grounding current of the power system with the neutral point grounded through the arc suppression coil is small, and it causes less interference to nearby communication.
以前我国电网普遍采用手动调匝式消弧线圈,由于不能实时监测电网的电容电流,其主要缺陷表现在以下两个方面:
Previously, China's power grid commonly used manual turn controlled arc suppression coils. Due to the inability to monitor the capacitance current of the power grid in real time, its main defects were manifested in the following two aspects:
(1)调节不方便,需要装置退出运行才能进行调节。
(1) Adjustment is inconvenient and requires the device to be shut down before it can be adjusted.
(2)判断困难,无法对系统运行状态做出准确判断,因此很难保证失谐度和中性点位移电压满足要求。
(2) It is difficult to make accurate judgments on the operating status of the system, making it difficult to ensure that the detuning and neutral point displacement voltage meet the requirements.
调匝式消弧线圈装置,该成套装置采用标准的工业级计算机系统,总线式结构,多层电路板设计,大屏幕触摸液晶屏,全汉字显示。具有运行稳定可靠、显示直观、操作方便,抗干扰能力强等特点,同时系统具有完善的参数设置及信息查询功能。该系统克服了以前各消弧线圈装置调节范围小的缺陷,能够进行全面调节。
The adjustable turn arc suppression coil device adopts a standard industrial grade computer system, bus structure, multi-layer circuit board design, large screen touch LCD screen, and full Chinese character display. It has the characteristics of stable and reliable operation, intuitive display, convenient operation, and strong anti-interference ability. At the same time, the system has complete parameter settings and information query functions. This system overcomes the limitation of small adjustment range of previous arc suppression coil devices and is capable of comprehensive adjustment.
该装置采用残流增量法和有功功率法等算法,对高压接地线路进行选线,选线准确、迅速。
The device adopts algorithms such as residual current increment method and active power method to select high-voltage grounding lines accurately and quickly.