高压开关柜内监测装置电源的研究与设计

Research and Design of Power Supply for Monitoring Device in High Voltage Switchboard

《智能电网关键设备(系统)研制规划》中提出要研制能适应恶劣气候环境、高度集成、高传输可靠、遵循标准通信规约的在线监测装置。高压开关柜中由于其器件老化或接触电阻过大,采用封闭式结构,散热效果差,容易由于过高温升导致火灾事故,故有必要在高压开关柜中装设监测装置。因高压环境下监测装置提供电源不方便的缘故,设计一种高压开关柜内监测装置用电源。电源装置包含取电模块和电能调理模块,取电模块根据电磁感应原理将一次母线中电能取出,经过电能调理模块后得到稳定直流电压,且利用超级电容保证在一次电流短时间不足时监测装置仍不断电。

It is proposed in ＂Smart grid key equipment（system） development plan＂ that on-line monitoring devices that are highly integrated, can adapt to harsh climate environment, have high transmission reliability and follow the standard communication protocol must be developed. Fire accidents are likely to happen in high-voltage switchgear due to high temperature rise which are caused by the aging or high contact resistance of the device, the use of closed structure and the poor heat dissipation effect. Therefore, it is necessary to install monitoring device in the high-voltage switchgear. However, the power supply of the monitoring device operating in high-voltage environment is not readily available, so a kind of power supply for the monitoring device in high-voltage switch cabinet has been designed. The power supply device comprises a power taking module and a power conditioning module. The power taking module takes out the power of a bus according to the principle of electromagnetic induction, and after the power goes through the power conditioning module, stable DC voltage is obtained. And the device is also equipped with a supercapacitor to ensure that the device is still powered when there is insufficient primary current within a short time.