| With the rapid development of modern communication technology and network technology in our country,more and more data are connected to substation system.Between users and power plant substation,the data exchange frequency increases,poses a great threat to these two systems the safety of substation,and puts forward new requirements for the safe and stable operation of two substation secondary system.Firstly,the substation secondary system is analyzed,and the reliability evaluation index is proposed according to the substation secondary system structure characteristics.Because of the diversity of the two systems in the substation,the reliability evaluation of the system is difficult,so the two system security evaluation model of substation is established by using the least path set of fault tree.Then,in view of the requirements of security protection,a 110 kV substation safety zone is divided,and the technical measures and key technologies of the two system security protection are analyzed.At the same time,some key equipment used in the safety protection scheme are also described.Then,according to the related algorithm theory,the two system security of the 110 Kv substation is calculated,which are calculated from the equipment availability,the two circuits of the digital transmission line and the different networking methods,and the existing problems are analyzed according to the calculation knot,and the corresponding solutions and ideas are given at the same time.Finally,this paper analyzes the specific implementation of the two system security protection scheme of a 110 kV substation,including the implementation content of different stages,the implementation of the safeguard measures and the effect of the implementation of the final plan.The research results show that the two system security protection scheme of a 110 kV substation designed in this paper can play its expected effect and realize the safety protection of the two system of a certain substation. |
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