Research And Design Of Load-specific Controller For Diesel Generator Testing System

The diesel generator testing system plays an important role in ensuring the stable operation of the generator,and the load controller,as the core part of the testing system,determines the accuracy of the test results to a certain extent.However,the imbalance between the various load levels,which is particularly prominent in testing systems with a large number of load levels,affects the durability and reliability of the testing system.Therefore,to ensure the long-term reliable operation of the testing system,the balanced configuration and utilization of each load level is particularly important.This thesis focuses on the load controller of the diesel generator set testing system and designs a specialized controller for the balanced utilization of the load gears.Firstly,the architecture of the diesel generator set testing system and the load control model of the load controller were introduced.The main types of load controllers were analyzed and the use of a single-chip microcontroller as the load controller for the testing system was established.The existing problems in load balancing and load monitoring using load controllers were discussed,and a complete design scheme for a load-specific controller was proposed.Secondly,to address the issue of balancing the use of load gears,a load control model with a decay coefficient was proposed based on the traditional knapsack problem model.A load balancing control strategy was designed based on expert systems and random optimization algorithms.An algorithm simulation model was built,and simulation experiments comparing the load control model and the two control strategies were conducted using the expert system with a decay coefficient and the combination of the expert system and the random optimization algorithm.The feasibility of the load control model and control strategies for load balancing control in the testing system was verified.Next,based on the analysis of the load control model and control strategies,the thesis designs the hardware and software components of the specialized load controller.The hardware components include the minimum system,power supply,and relay driver circuit modules,which mainly control load switching.The software components include control programs and upper computer software,with the upper computer software used for load monitoring and control.Finally,the diesel generator set loading test experiment and load balancing control validation experiment were designed and conducted to verify the load-specific controller experimental platform.The experimental results show that the load-specific controller can effectively control the load accurately,and the power of the load combination meets the set requirements.Under different control strategies,the control strategy combining expert systems and random optimization algorithms proposed in this thesis is superior to traditional control methods and control strategies that only use expert systems.The maximum difference in value ratios between different load gears is only 0.104%,while it is 6.804% and 4.370% for traditional control methods and control strategies that only use expert systems,respectively.The load balancing use effect was basically achieved,verifying the feasibility of the load balancing control strategy proposed in this thesis and the rationality of the load-specific controller design.