Design Of Backup Power Supply For MRD Control System Based On Super-capacitor Hybrid Energy Storage

As a semi-active vibration control device,MRD(magnetorheological damper)is widely used in the vibration control of cable-stayed bridge because of its fast output response,low energy consumption and stable operation.The cable-stayed bridge in the coastal area is often affected by extreme weather such as typhoon,which leads to frequent power failure.Therefore,in order to ensure the normal operation of the MRD vibration control system,it is necessary to configure a reliable backup power supply.In order to improve the fast response of the backup power output and the stability of the mechanical properties of the MRD,the load voltage and the load voltage under the disturbance of the pulse power are used to improve the performance of the MRD damping control system in the complex environment for the high performance backup power supply in the complex environment.The output current of the lead-acid battery is the goal,the research on the backup power supply design of the MRD damping control system based on the super capacitor hybrid energy storage includes the following aspects:First of all,the design of hybrid energy storage backup power of the overall program,and carry out super capacitor charge and discharge performance simulation and experimental research.Based on the analysis of MRD damping control system and existing power supply mode,a hybrid hybrid energy storage reserve power scheme is proposed.By analyzing the supercapacitor mechanism and structural features and comparing the three equivalent circuit modeling methods,the PLECS Power Electronics The superconducting bidirectional charge and discharge circuit was designed and the charge and discharge simulation was carried out.The super capacitor constant current charge and discharge test platform was set up and the rated capacity 16 V 500F super capacitor module was charged and discharged.The results show that the ESR-EPR equivalent circuit model is simple and the parameter measurement is easy to obtain.It can simulate the charging and discharging process of the super capacitor,and provide the basic basis for the further design of the hybrid energy storage system circuit.Secondly,the study of super capacitor-lead acid battery hybrid energy storage system modeling and circuit design and simulation.Based on the comprehensive analysis and comparison of the performance of the electrochemical energy storage element and the mixed energy storage scheme,and considering the MRD vibration control system for the fast power and continuity requirement of the backup power supply,the converter-inductively coupled super capacitor-lead acid battery hybrid storage And the equivalent mathematical model of each part of the converter is established by using the AC small signal modeling method.The parameters of the analog PID controller are set by the dynamic response method.The PLECS and PROTUES simulation are carried out by using the BUCK-BOOST topology bidirectional coupling converter.Design software for circuit simulation.The results show that the output energy rise time tr = 0.98 ms,the mixed energy storage system tr = 0.08 ms at 9V to 5ohm load output,and the single storage under the action of peak current 2A,f = 500 Hz pulse current source disturbance The output voltage fluctuation rate of the hybrid energy storage system is reduced to 5%,and the output current fluctuation rate of the battery is reduced to 16%.In contrast,the hybrid system will have a voltage fluctuation rate of 22%,the battery output current fluctuation rate will reach 50% The rapid response of the output response significantly improved,under the action of the load voltage and battery output current fluctuations significantly reduced.Once again,the design of DC UPS and carry out the main power supply power switch case MRD vibration control system mechanical stability test.The design problem of DC UPS(uninterruptible power supply)module is studied.The circuit design method is given and the corresponding test platform is built.The mechanical performance test of the damper is carried out under the condition of simulating the power failure of the main power supply.The results show that the output current rise time can be reduced to 0.8ms by using the lead acid battery as the UPS energy storage unit,the voltage is further reduced to 0.5ms when the super capacitor is the energy storage unit,the output voltage of the load side is kept constant,The mechanical properties of the damper are protected from power failure.The traditional AC uninterruptible power supply simple relay switching action that need more than 1ms,compared to the DC UPS design to improve the backup power switching speed,to protect the switching process MRD vibration control system performance stability.Finally,the output step response test and the pulsed power disturbance response test of the hybrid energy storage system are carried out.The output response test platform of the hybrid energy storage system is designed and built.The step response test of the hybrid energy storage system and the response performance test under the impulse load superposition disturbance are carried out.The results show that the dynamic value of the current step response of the hybrid energy storage system is mainly provided by the supercapacitor instantaneous output component under the condition of stable load power.The steady-state value is finally maintained by the battery.When the stable load power is superimposed on Imax =1A\f = 1Hz pulse perturbation power,the super capacitor can quickly compensate for more than 75% of the power pulse,and the battery output current,load terminal voltage fluctuation rate maintained at 10%,the test results and simulation conclusions are basically the same,the backup power supply design To achieve design goals.