Research On Voltage Stabilization Control Of On-board Power Take-off Generating Set Regulation System

When the power grid is severely damaged or in places where is no power grid in the wild,mobile power equipment is very important,so the in-vehicle and take-off power generation system has a very important position.Because this system is non-linear and extremely complex,the work requirements of the in-vehicle and take-off power generation system are first to ensure work safety and output high-quality power.This research is of great significance in the field of engineering.In recent years,in-vehicle applications and take-off power generation systems have expanded widely,and the used cases have become more and more complex.The application environment has become more difficult.Whether it is parking or driving power generation,stable power supplied is still the most important question.This article studies the structure of a vehicle with two generators.The parking model uses an electric excitation generator.The driving model adopts permanent magnet excitation generator.The in-vehicle and take-off power generation system has the following characteristics: complex structure and high control accuracy,which enormously escalation the adversity of system implementation.When the substantive working circumstances are discombobulated,so as to enhance the firmness of the system working manner,this dissertation carries out discuss on high-ranking control theories and methods for in-vehicle and take-off power generation systems.The main work has the following three aspects:(1)Research on diesel engine speed governing control of parking power systemUnder special conditions,the stable voltage of the synchronous generator is heavily dependent on the analytical connection of compression-ignition engine,and then authorize the deliver function model in accordance with each unit of the speed control system.On the foundation,a Fuzzy PID-Smith conditioner pattern is put forward.Fuzzy majorization of the three PID criterions and successive regulation is fulfilled to the control demands.At the same time,the Smith controller is used to compensate for the pure lag problem of the diesel engine system.Finally,in the Simulink environment,the simulations under the load sudden increase and abrupt reduce circumstances were enforced.From the simulation conclusions,Fuzzy PID-Smith command has a prosperity submission influence in this system and can fulfill the command requirements under extraordinary working circumstance.The system control effect of Fuzzy PID-Smith controller is better.(2)Research on generator excitation control of parking power systemUnder special conditions,the stable voltage of the synchronous generator is heavily dependent on third-order pattern of contemporaneous generator and the exciterx pattern with saturation characteristics.Then,a fourth-order space condition equation is put forward.A forecast pattern of the MPC is obtained by the model of linear discretization according to the state equation.Add the ending punishment extremity and the ending inequality region to the cost effect of the MPC rolling majorization section,and carry out feedback correction to acquire the linearization command rule.Finally,in the Simulink environment,the load rapid enhance and rapid reduce state separately are simulated.From the imitation conclusions,it can be seen that it is feasible to introduce the designed model predictive controller introduced into the system.Compared with the traditional controller system,the introduction of the model predictive regulator has a beneficial influence on the system.(3)Research on sensorless current vector compound control of driving power generation systemIn order to ensure that the in-vehicle synchronous generator can output a stable voltage when the driving speed changes,a command summary combining field weakening vector modus and modus without transducer is utilized.When the speed change interval of the diesel engine is relatively wide or the load change range is relatively large.A mathematical model of a permanent magnet synchronous generator is established,and the direct-axis and quadrature-axis currents of the voltage stabilization control are determined by the stator current vector trajectory,and then the air gap magnetic field of the generator is adjusted for voltage stabilization control;The model reference adaptive system(MRAS)is used to estimate the rotor position and speed information,derive the adaptive law,and replace the use of mechanical sensors with sensorless control.The simulation of acceleration reduction and load change is carried out through Simulink software.The simulation results show that the designed control strategy can make PMSG respond quickly to the change of speed and load when there is no sensor,and output a stable voltage,which verifies the effectiveness of the control strategy.This paper has 43 pictures,12 tables,and 62 references.