10kV载波线路频率切换的最优化研究

为了获取较高的通信质量,文章提出一种10 kV电力线载波通信的最优化策略.该策略基于统计方法,比较当前频点的通信质量与期望阈值,根据比较结果决定是否改变通信频点.当期望阈值小于最高期望阈值且在该频点通信达到规定的一段时间时,升高期望阈值,可以使系统跳变到通信质量更高的频点上.为验证本策略的有效性,首先在实验室模拟现场实验.通过分析模拟实验结果,证明通信策略得到优化,实现自动频率切换的优化目的.现该策略已用于山西某示范电网中,并根据数据分析结果选取最高期望值为0.5.

Research on the Optimization of Switching Frequencies for 10 kV Powerline Carrier

In order to obtain better communication quality,this paper represents the optimal strategy for 10 kV powerline carrier communication protocol.The strategy is based on statistical methods to compare the current communication quality and expected threshold at certain frequency.Whether to change the communication frequency is decided according to the comparison results.When continuous frequency-hopping through all frequency points happened,the expected threshold will be reduced.The maximum expected threshold can be determined according to the specific field applications.The minimum expected threshold is set to 0.1.When the current expected threshold is less than the maximum expected threshold and the communication in the frequency lasts a certain period time,the expected threshold will be increased,so that the system can hop to the frequency point of higher communication quality.To verify the effectiveness of this strategy,firstly field experiments was simulated in the laboratory,by using signal generator to simulate white noise and add to the communication line.By analyzing the simulation results,it is shown that the communication strategy has been optimized to achieve the purpose of automatic frequency-hopping.The strategy has been used for a demonstration powerline network in Shanxi province,and the maximum expected threshold is set to 0.5 according to the analysis results.