In order to solve the safety problems caused by the continuous improvement of train speed and the continuous growth of railway scale, it is inevitable to apply wireless sensor network (WSN) to train operation environment monitoring. In order to prolong the survival time of wireless monitoring network, the game theory is used to construct a distributed topology model. In order to solve the problem of network lifetime shortening caused by uneven energy consumption of nodes, the Theil index is introduced to improve the energy consumption balance of nodes, and a topology control algorithm for energy consumption balance (EBTCA) is proposed. Experiments show that the algorithm has good results in terms of network lifetime and energy balance.

The access of large-scale wind power seriously threatens the safe and stable operation of the power system. In this paper, a novel energy function based transient stability analysis approach is proposed for the power system integrated with Double Fed Induction Generator (DFIG). First, the network structure-preserving model of power system integrated with DFIG is established, where generators adopt 3th order electromechanical model, and its energy function is deduced. Next, the energy function of post-fault system is approximately calculated by trapezoidal integral path, and energy function based transient stability criteria are put forward to access the stability of the post-fault system. Finally, the New England-39 bus system integrated with DFIG is used as test system to investigate the validity of the proposed approach.

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With the proportion of automobile industry in people's work and life increasing year by year, the automotive intelligent terminal market has ushered in a huge development prospect. On-board information system is a set of control system used to collect, store and display all kinds of information status in the process of automobile running. Controller Area Network (CAN) is a serial communication field bus network that effectively supports distributed monitoring or real-time control. Through the CAN bus technology, the vehicle-mounted intelligent terminal can easily interact with other devices in the automobile, so as to master the running status of the vehicle. The vehicle-mounted 3D acquisition system continuously acquires the traveling position of the measuring vehicle through GPS, and provides geographic coordinates for the 3D spatial images acquired by the measuring vehicle, thus realizing the 3D scene with spatial geographic coordinates. Relying on CAN bus and GPS technology, the vehicle-mounted intelligent terminal can conveniently obtain the surrounding road condition information and send its own vehicle data to the remote control center.

Using the respective characteristics of ZigBee and GPRS technology, it shows its reliability and security in data transmission. At the same time, the combination of the two communication modes brings complementary advantages. This paper studies the railway communication network test and credible defense based on ZigBee and GPRS. This system adopts the communication mode of waking up module when star topology and requirement are adopted, which effectively reduces the power consumption of each sensor node and the probability of collision between sensor nodes when reporting data to sink node. Using GPRS network to transmit data of sink node has changed the limitation of traditional wireless sensor networks that need to rely on wired public network for data transmission. The system scheme of low cost and low power wireless sensor network based on ZigBee technology and GPRS network proposed in this paper has broad application prospects in environmental monitoring, military, medical health, home intelligent monitoring and wireless meter reading system.