基于EXI的配网信息模型交换格式研究

Research of model exchange format for distribution network based on EXI

为了实现配网信息模型的数据结构共享和信息交换,针对常用CIM/XML在实际应用中存在的性能问题,给出一种基于EXI格式的配网信息模型的数据交换方法。利用EXI对CIM/XML进行编码,通过编码事件流、预压缩及压缩三个步骤,得到基于EXI的CIM模型,并对CIM/XML、CIM/E和EXI三种数据交换格式的性能指标进行对比分析。测试结果表明,基于EXI的信息模型在内存消耗与解析耗时方面较XML更有优势,提高了配电网信息模型数据交换效率,对实现智能配电网的信息集成具有重要参考意义。

Aiming at solving the practical performance problems of CIM/XML which result in the incontinency of the data-structure sharing and the information exchange of the distribution network information model,a specific method of data exchange based on the EXI format utilized in the distribution network information model is presented in order to realize the convenience of the data-structure sharing and the information exchange.In this method,the EXI format is used to encode the CIM/XML.And the CIM model based on the EXI is obtained through three steps:event stream,pre-compression and compression.Furthermore,the performance indexes of the three data-exchange formats:CIM/XML,CIM/E and EXI are also compared and analyzed based on the analysis.The test results show that the EXI information model is much better at reducing the memory consumption and analyzing time consuming than the XML one.Obviously,the EXI model highly improves the data-exchange efficiency of the distribution network information model.Therefore,the EXI information model has the referential significance to the realization of the smart distribution grid information integration.