Design And Research Of 220kV Smart Substation Digital Relay Protection System

At present,with the continuous progress of science and technology,in the field of substation,intelligent,networked new substation development is becoming the mainstream.More and more technologies,such as mechanical and electronic engineering technology and Internet technology,have been applied in intelligent substation system.Especially,the new substation adopts the method of optical fiber to transmit signals through the network.As a result,the development of substation has entered a new era.According to the IEC61850 standard,the secondary intelligent device and primary equipment can complete communication and modeling according to the standard platform.At the same time,the digital relay protection system can be achieved.Compared with the existing secondary equipment of relay protection,digital relay protection has changed the configuration mode of equipment to a certain extent.Because of the special characteristics of smart grid,the application of relay protection is limited to some extent.Therefore,the research and analysis of the relay protection technology of 220 kV Smart Substation Based on IEC61850 standard plays a very important role in promoting the wide application of smart grid.This paper first introduces the research background and significance of relay protection technology in 220 kV smart substation,and combs the current research status briefly.At the same time,it also introduces some excellent research results,and points out the main work of this paper and the structure of the paper.This paper focuses on the working principle of intelligent substation and the actual functions of each part,as well as the role played by the protection device of intelligent substation.The centralized networking scheme is based on the combination of MMS,GOOSE and IEC61850,while the process layer network is based on the combination of IEC61850,GOOSE and SMV.The characteristics of various equipments in 220 kV intelligent substation and their influence on relay protection technology are analyzed.This paper mainly studies the characteristics of electronic sensors,and analyses theimportant role of electronic sensors in the protection of equipment under the condition of new substation.Based on the working principle of 220 kV new type substation,the working mode of each equipment in intelligent substation,especially the working principle of communication,is studied,and the influence of the application of intelligent substation on the development of substation equipment in China is analyzed.The intelligent substation in a city is discussed in depth,and the distance analysis of some parts which need to be optimized is carried out.Analysis of the impact of intelligent substation in real life,and this paper needs to optimize the part.The construction of intelligent substation should consider the long-term stable operation of equipment,and ensure that the system can be upgraded in time to continuously adapt to new technology.