Protection settings transmitted over SCTP protocol in intelligent substations

Usually, MMS packets are used to encapsulate the information of protection settings and TCP is the suite of protocols used to transmit the MMS packets in smart substations. Since TCP's own mechanism, such as vulnerability to Head-of-Line (HoL) blocking attacks, the protection settings of TCP transmission often fail to meet the high reliability requirements of important power information. A new method of SCTP protection setting and transmission based on IEC61850 intelligent substation information structure is proposed in this paper. To realize seamless handover of double MMS network during failure time, the SCTP's multi host function is optimized. To avoid HoL blocking attacks, the multi stream mechanism is used. This paper further studies the realization method and implementation process of SCTP transmission with protection setting in detail.