Research On Optimization And Function Of Integrated Power Quality Manager For Three-phase Four-wire System

Since the development of the power industry,the emergence of various new types of electrical equipment has brought about a reduction in the power quality of the entire power network and an increase in losses,especially the distribution network.In addition to harmonic pollution and low power factor,power quality issues are becoming more and more serious with three-phase load imbalance,and it also has a greater impact on the loss of the distribution network.The power quality integrated manager proposed in this paper has a significant effect on improving power quality and reducing power loss in the distribution network.The main research contents are as follows:This article first introduces the research background of the subject and the current research status of power quality management and distribution network loss reduction at home and abroad,and introduces the power quality problems and loss problems existing in the distribution network,and explains the solutions to such problems.necessity.Then,the existing three-phase four-wire power quality integrated manager was introduced and performance tested,which verified its role in improving power quality.Then analyze the effect of the three-phase unbalance treatment on reducing the loss of the distribution network: firstly,the concept of three-phase unbalance degree is introduced,and the calculation model of the additional loss of the 10 k V distribution network caused by the three-phase unbalance is established,and then combined with the equipment Regarding the three-phase unbalanced governance capability,it is calculated that the equipment reduces the additional loss of the three-phase unbalance under the condition of different unbalance degrees.Finally,the equipment was connected to the grid,and a series of problems appeared in the process: insufficient dynamic response performance,insufficient consideration of compensation current limiting strategy,poor LCD monitor effect,small normal working AC voltage range,and difficulty in simulating common loads Actual working conditions.Then,targeted optimization and improvement were made to these problems,and the equipment before and after optimization was compared through Simulink simulation and grid-connected experiments to verify the feasibility and effectiveness of the optimization.