In the ubiquitous electric internet of things, the traffic load of the process-level in smart substations, which is responsible for uploading operation status and issuing control instructions in smart substations, will be increased sharply. High-availability Seamless Redundancy (HSR) topology configuration method in traditional IEC61850 standard protocol has the disadvantage of poor real-time transmission of information due to the extra traffic and corresponding transmission delay caused by data replicas circulating in the rings. Therefore, a seamless configuration method based on greedy traffic optimization scheduling algorithm for process-level network is proposed. Firstly, two kinds of HSR configuration schemes are proposed:Cross-Links (CLs) scheme and Four-Connected Rings (FCRs) scheme. Secondly, in order to avoid congestion in process-level network, which leads to poor transmission timeliness, a traffic scheduling strategy based on greedy algorithm is proposed. Finally, a substation simulation example based on Opnet shows that, compared with the traditional network topology configuration scheme, the average data transmission hops of the proposed scheme are 50% lower than those of the traditional network topology scheme. In addition, the recession of the transmission delay, packet loss rate and throughput of the process-level network using proposed greedy algorithm are reduced by 32.7%, 63.5% and 33.3% respectively compared with the traditional scheduling algorithms in congestion situation. Therefore, the proposed scheme can significantly improve the performance of process-level network in smart substation. This work is supported by Project of State Grid Chongqing Electric Power Company and National Key Research and Development Program of China (No. 2017YFB0902800) “Key Techniques Research on Intelligent Distribution Network Operation based on Micro Synchronization Phasor Measurement”.