IEC TS 62257-2:20 15（E）提出了一种建立和开展社会经济研究的方法，作为分散农村电气化项目框架的一部分。它面向项目组，特别是负责国际项目社会经济研究的专家。本技术规范还提供了一些结构作为技术解决方案，可以根据定性和定量的能源需求，根据客户的需求和财务状况进行推荐。与上一版相比，主要技术变化如下: -将最大AC电压从500V重新定义为1000V，将最大DC电压从750V重新定义为1500V； -取消100千伏安系统规模的限制。 本出版物应与IEC 62257系列一起阅读。

IEC TS 62257-2:2015(E) proposes a methodological approach for the setting up and carrying out of socio-economic studies as part of the framework of decentralized rural electrification projects. It is addressed to project teams and in particular to experts in charge of socio-economic studies in international projects. This technical specification also provides some structures as technical solutions that could be recommended, depending on the qualitative and quantitative energy demands, consistent with the needs and financial situation of the customers. The main technical changes with regard to the previous edition are as follows:
- redefine the maximum AC voltage from 500 V to 1 000 V, the maximum DC voltage from 750 V to 1 500 V;
- removal of the limitation of 100 kVA system size.

This publication is to be read in conjunction with IEC 62257 series.