Application Research Of AVC System Based On Hybrid Optimization Algorithm In Baiyin District Power Grid

With the development of society,people have put forward higher requirements for power quality.Voltage is particularly important as one of the three major indicators to measure power quality.The instability of voltage will affect the use and life of electrical equipment,affect product quality,and cause unnecessary economic losses.Automatic voltage control(Automatic Voltage Control—AVC)technology is to coordinate the unified control of each reactive power equipment through running sporadically in the entire power grid,so that the voltage and reactive power tracking can be set in advance or the generated target according to a certain strategy can be intelligent automatic adjustment to achieve safe and economic operation of the power grid.Based on the actual operation of the Baiyin regional power grid,based on the analysis of basic data such as system links,power distribution,and the pivotal position of the Baiyin power grid in the system,a three-level voltage control system based on "soft zoning" is proposed as the general idea of the automatic voltage control architecture at Baiyin regional power grid.First of all,according to the actual situation of AVC based on DF8003 S system in the silver grid in recent years,and since the existing AVC system has frequent adjustment of the main transformer tap-changer,which resulted to the failure of reactive power compensation,parallel operation of transformers,reactive power reverse transmission,etc.These questions provide a basis for the work of this article.Then,based on the basic principles of voltage and reactive power regulation,the relationship between load and reactive power,substation voltage and reactive power conversion is discussed.With the goal of high voltage quality and minimum network loss,comprehensive application of switching capacitors and regulating main Transformer tap changer and power plant,user coordination and other means to improve the quality of reactive voltage.From the perspective of multi-constrained and multi-variable mixed nonlinear optimization,a hybrid reactive power optimization algorithm combining original dual interior point method and improved genetic algorithm is proposed.At the same time,sensitivity analysis is performed,and a fuzzy expert system based on sensitivity analysis is used to perform voltage correction.Finally,the AVC system based on the hybrid reactive power optimization algorithm applied to Baiyin Power Grid is designed and implemented.In the view of overall system structure,the control relationships among the dispatchers at various levels of provinces,prefectures and counties,power plants,substations and users are sorted out.The voltage and reactive power adjustment strategy has designed a smart grid AVC system that covers the entire process of reactive power voltage control including optimization,adjustment,and protection,including system operation,parameter setting,strategy adjustment,and limit input.Analyzing the stability of the system through actual operating conditions to achieve the expected control goals.