Research On Key Technologies Of Partial Porous Externally Pressurized Gas Bearing

With the depletion of traditional fossil energy and the rapid development of society and economy,the traditional large-scale power grid distribution form gradually fails to meet the requirements of efficient energy use and clean energy production.Distributed power supplies have many advantages such as high environmental friendliness,flexible configuration,improved power supply quality,enhanced power supply reliability,and compliance with sustainable development requirements.They have gradually become complementary and perfect means for centralized power generation.Due to some natural characteristics of distributed power,its access to the distribution network has changed the latter’s system flow and operation mode,which will have unavoidable impacts in many aspects,such as network loss,relay protection measures,and power supply reliability.Therefore,the rational planning and configuration of distributed power in the distribution network is of great theoretical value and practical significance for the healthy operation of the distribution network.This article first summarizes the background of the distributed power planning and configuration topic,its research purpose and significance,and starts from three aspects of distributed power planning and configuration model,planning uncertainty,and model solving algorithm.It introduces the subject at home and abroad.Research the current situation and future development direction.Then it introduces the common distributed power and then describes the impact of the distributed power access to the distribution network on the latter in different aspects,which plays a fundamental role in the establishment of the planning and configuration model described later.Secondly,the traditional particle swarm algorithm is improved,and the three-dimensional particle swarm algorithm is obtained by introducing the height parameter,which expands the dimension of the algorithm search space and changes the operation logic and iterative principle of the algorithm.The simulation verification of standard test functions proves that the 3D particle swarm algorithm has good computing performance.Then,in order to avoid the disadvantages of the traditional network loss micro-increase rate method at the end of the feeder and the high sensitivity in the heavy load area,the concept of comprehensive network loss micro-increase rate is used to select the access points of the distributed power supply in the distribution network.Considering that distributed power access to the distribution network has the advantages of reducing network losses,supplementing large power grids,and reducing pollutant emissions,this paper establishes a multi-objective,multi-constraint,and non-linear planning and configuration model that takes into account economics,national policies,and the environment Benefits in three aspects,and normalize all aspects from the economic level,in order to achieve the purpose of the smallest comprehensive annual cost of distributed power planning and configuration,the lowest network loss,and the highest environmental friendliness.Finally,taking the IEEE33 node standard test model as an example,the three-dimensional particle swarm algorithm and inertial weighted particle swarm algorithm are used to solve the distributed power planning configuration model.Through analysis and comparison of the planning results,some conclusions are obtained and the three-dimensional particles are verified.The feasibility and superiority of swarm algorithm in distributed power planning and configuration problems.