单相智能电能表内置负荷开关优化控制技术研究

Study on optimal control technology of single-phase smart meter built-in load switch

智能电能表内置负荷开关是实现智能电网"全费控"目标的重要保障。现有智能电能表内置负荷开关控制方式仅依据用户缴费情况,未考虑用户负载实际情况。若负荷开关断开瞬间触头通过大电流,极易拉弧而引发触点熔焊或烧毁。文中提出了一种综合考虑"全费控"功能实现、负载电流、负载功率因数等因素的单相智能电能表内置负荷开关优化控制机制,并通过对比测试验证了采用该控制机制可显著提升负荷开关使用电寿命,保障电力系统的安全、稳定运行。

Built-in load switch of smart meter is an important guarantee to achieve the target of complete fee control in smart grid.The existing control method of smart meter built-in load switch is only based on the payment situation of users,while doesn91 consider the actual situation of the load of users.If high current passes through contacts in the moment of the load switch breaking,itJ s extremely easy to cause arc which may trigger contacts welding or even burning.This paper proposes an optimal control mechanism of single-phase smart meter built-in load switch which takes the realization of the function of complete fee control,load current and load power factor of users into account.Through comparison test,it is proved that the optimal control mechanism can significantly improve the electrical life of load switch and ensure the safety as well as the stability of power system.