Design And Practice Of High Voltage Transmission Line Monitoring Based On Ground Wire Pumping

High voltage transmission line is the most important link in the power transmission.The normal operation of transmission line is closely connected with the whole power grid.The normal operation of the transmission line is related to the safety and efficiency of the whole power grid.In the current power grid operation and maintenance of transmission lines often occur in aging,weather,environment and human factors caused by high voltage tower and high-voltage line is severely damaged,this situation has not been prevention and treatment will greatly affect the reliability of power grid operation so as to hinder China's economic construction and stability in a timely manner.At present the techniques used in high-voltage tower operation environment monitoring equipment such as precision,unstable power supply,transmission mode,the old economic investment is too large and other defects are the main content of this thesis is to study and solve the direction.Based on the establishment of on-line monitoring system for high-voltage transmission line,the two key technologies of power and non power collection and analysis,and terminal equipment power supply on tower are studied respectively.First of all,the factors that affect the operation of transmission lines are discussed,and a special collection and research method is formulated according to the main influencing factors.After analyzing the collected data,a state parameter calculation algorithm is formulated.Aiming at the requirement of high-voltage transmission line with high collection accuracy and wide acquisition range,this paper puts forward the design idea of independent high precision sensor and decision decision circuit,and analyzes leakage current,conductor temperature and insulator and ground tilt angle.The research shows that high precision and low power consumption can be realized by electronic current mutual inductance,optical fiber voltage sensing and dual axis acceleration sensing.Next,we discuss the way of power collection for terminal equipment and transmission equipment of tower,it put forward the innovative application technology of using wire to extract energy from complex grounding line after gro unding.The technology of TLPS power acquisition and existing photovoltaic lithium battery technology are studied.By testing and testing under different insulation section and day light intensity,the two technologies can achieve stable power in the range of more than 5.4~125.9VA by designing charging and discharging management circuit.The results show that this method can actually run in the power grid and meet the operation requirements of the power supply N+1 standby at the same time.In this paper the realization of power supply system,terminal for online monitoring system of signal transmission and sensor devices for the corresponding design,experiment with electricity in solar panels and transformer wire through the BQ24600 chip and the protection circuit control makes two kinds of power supply scheme can achieve the desired results,the acquisition by experiment design analysis of algorithm and sensor circuit makes the acquisition accuracy has been improved,the power supply module,measurement module.communication module to coordinate the work with the control of the main control chip STM32F103 in the software design,the system has already passed the application in the construction of the pilot construction of transmission line engineering,there will be a broader and better future for the future.