Research On Advanced-disposal System Of Power Supply Equipment In Coal Mine Underground

The transition from device scheduled inspection to device failure advance-disposal in underground Substation is necessity to achieve the security of power supply in the situation of there is no personnel on duty in the underground coal mine. This paper carries on research of the problems existing in the process of implementation of failure advance-disposal of underground power supply equipments, to provide a technical support for automation and reducing people and improving efficiency in coal mine.The failure advance-disposal system of underground power supply equipments designed in this paper has following characteristics. It is supported by a wireless network. During of routine inspection of the staffs or once receiving malfunction alarm of the equipment, the system will act expeditiously.In the process of movement and on-site inspection disposal,the system receives dynamically the relevant information about the devices, such as the development trend of equipment abnormal state, thus guarantee the safety of personnel and the treatment of equipment abnormal state efficiently. Meanwhile,the system tracks behaviors of working-staffs, so as to ensure the disposal of equipment abnormal state timely and correctly.First, the coupling and scattering of electromagnetic field both inside and outside of the high voltage switchgear were studied. On the bases of the method of Green’s function and the method of transmission line, the equivalent source model and circuit model of a High Voltage Switchgear gap were set up, the calculation method of transmission performance was given. Influence of transmission performance from the frequency of electromagnetic waves, the shape parameters of the high voltage switchgear and the gap, and the position of the source point and the field point were Analysed.After resolving the problems of wireless transmission of data from the high-pressure cabinet, the distributed robust routing algorithm are designed and realized from the macroscopic directional and micro randomly angles. The transmission probability of the algorithm is obtained by solving nonlinear optimization mathematical problem with the goal of the maximum throughput of the entire network; reliability of communication is achieved, thus ensuring the reliable delivery of data to the disposal staff.In order to solve the problem of imbalance data in transmission network, the paper applys the theory of compression perception in the process of data transmission. In accordance of demands of high compression ratio of image-powered devices,an improved algorithm based on the ISD is proposed. The algorithm shows good reconstruction property for high compression ratio data, thus ensuring that the disposal staffs receive the relevant data and important video information timely in case of limited bandwidth.In order to solve the problem ofunderground personnel positioning based on wireless network, the paper uses the unitarily invariant norm, the upperlimit of error based on the maximum likelihood positioning method for the intensity of electromagnetic signal is derived. The positioning algorithm which can improve the positioning accuracy based on the upperlimit of erroris proposed, thereby at the technical level to monitor walking path of the disposal staffs more sophisticatedly, to urge the disposal staffs disposing in right place, to guarantee timely disposal of abnormal equipment of power supply.