With the increasing complexity of networked power systems, traditional control schemes are difficult to meet the actual needs. Bandwidth constraints, network security and actuator saturation have become important factors affecting the stability of power systems. An improved event trigger mechanism was introduced to improve the utilization rate of bandwidth resources for the problem of bandwidth resource limitation, and a new mathematical model of power system under deception attack and actuator saturation was constructed. Based on this number model, the sufficient conditions for the asymptotic stability of the power system were obtained by Lyapunov theory, and the design scheme of the security controller was given by using linear matrix inequality technique. Finally, an example of power system was given to illustrate the effectiveness of the proposed scheme.

The oxidation state in the process of the fire flooding is very important index factor to judge the efficiency of oil combustion. In this paper, the insufficiency applicability of the method of judging combustion state in the process of ordinary heavy oil fire flooding is studied. First of all, the thermal weight experiment of Du 66 crude oil in Shuguang oil field was studied to determine the relationship between the oxidation temperature and the quality of the reaction stage, and the different stages of the reaction characteristics were obtained. Subsequently, the high temperature and low temperature oxidation experiments were stimulated in order to determine the oxygen utilization ratio, N ₂/CO ₂ molar ratio, H/C atomic ratio and gas value of crude oil sample. The results show that these indicators can be used to judge the calibration value of the oxidation reaction state, so as to guide the field to judge the state of oxidation.