抑制用电负载噪声的低压断路器装置设计与应用

Design and application of low-voltage circuit breaker device to suppress noise of power load

针对低压台区电力线载波信道易受居民用电负载接入噪声干扰,导致部分台区难以满足新型电力系统“源-网-荷”高效互动所需的实时载波通信需求的问题,提出一种抑制用电负载噪声的断路器装置设计与应用方法。首先对用电负载接入噪声特性及其对载波通信影响进行了分析;然后设计了抑制用电负载噪声的断路器装置,对断路器装置电路的原理和参数进行了详细设计,该装置在电表外置断路器基础上增加了低通滤波、阻抗匹配、载波信号旁路电路,在抑制居民用电负载噪声的同时构建连通户内电器和电表之间的载波信号旁路通道;最后结合典型案例台区对文中断路器装置的使用效果进行了分析。应用结果表明,该断路器装置可有效提升台区电力线载波通信的成功率和网络性能,减少现场维护工作量,为建设新型电力系统的高效本地通信网络提供技术支持。

In view of the fact that the power line carrier channel in low-voltage substation area is susceptible to the disturbance of the noise of residential power load access,which makes it difficult for some substation areas to meet the real-time carrier communication requirements for the efficient interaction of"supply-grid-load"of new-type power system,a design and application of circuit breaker device to suppress the noise of power load is proposed.The characteristics of noise of power load access and its impact on carrier communication are analyzed.A circuit breaker device to suppress the noise of power load is designed,and the circuit principles and parameters of the circuit breaker device are designed in detail.For this device,the low-pass filtering,impedance matching and carrier signal bypass circuit are added on the basis of the external circuit breaker of the electricity meter,which constructs a carrier signal bypass channel connecting indoor appliances and electricity meters while suppressing the noise of residential power load.The application effect of the designed circuit breaker device is analyzed in combination with typical cases of the substation area.The application results show that this circuit breaker device can effectively improve the success rate and network performance of the power line carrier communication in the low-voltage substation area,and reduce the workload of on-site maintenance.Therefore,it can provide technical support for the construction of efficient local communication network for the new-type power system.