台区用电环境对高速载波功率余量的影响分析

Analysis of the Influence of Electrical Environment on High Speed Carrier Power Margin in Power Supplying District

为响应国家电网对建设智能电网所提出的绿色低碳和节能减排的倡议要求,针对低压电力集抄台区日益显现的用电信息采集终端通信模块功耗高、温升大等潜在的危险因素,提出一种基于Homeplug规范的高速载波功率余量最大化算法。在保证台区集中器与智能电能表通信实时性的前提下,通过限定集抄通信速率、降低载波芯片功耗门槛以及自适应分配子载波发送功率,实现了高速载波功率余量的最大化。结合低压电力集抄台区用电环境的特性,分析了其对高速载波功率余量的影响,并针对性地提出了解决思路。实验数据表明:在用电信息采集终端通信模块的目标传输速率为2 000 kbps时,所提算法的载波功率余量性能最佳,可有效降低通信模块的功率消耗和表面温升。台区用电环境中电力电缆的传输衰减对载波功率余量的削弱作用最明显。

In response to the proposal of the State Grid for green,low-carbon and energy-saving emission reduction for building smart grids,a high speed carrier power margin maximization algorithm based on Homeplug specification is proposed in view of the potential risk factors of high power consumption and large temperature rise in the information collection terminal communication module of the low-voltage power supplying district.On the premise of ensuring the real-time communication between the centralizer and the intelligent electric energy meter,the maximization of the high speed carrier power is realized by limiting the communication rate,reducing the power threshold of the carrier chip and the adaptive distribution of the transmission power of the subcarrier.Combined with the characteristics of the power consumption environment in the low voltage power meter reading area,the influence of the power consumption on the high speed carrier power margin is analyzed,and the solutions are put forward accordingly.The experimental data show that when the target transmission rate of the terminal communication module is 2000 kbps,the performance of the proposed algorithm is the best,which can effectively reduce the power consumption and the surface temperature rise of the communication module.The transmission attenuation of power cable in power supplying district weakens the carrier power margin obviously.