Design And Implementation Of Secondary Circuit For Substation Relay Protection And Research On Related Issues

With the support of computer technology,modern communication technology and electronic technology,substation began to carry out comprehensive self-renovation to realize the comprehensive automation development of power system.In the comprehensive self-renovation process,the design of relay protection secondary circuit in substation shows many deficiencies,such as unreasonable screen assembly mode and unscientific equipment layout,which affect the function of secondary circuit.In intelligent substation,the design scheme and equipment composition of relay protection secondary circuit have changed.Electric power enterprises need to clarify the difference between integrated substation and traditional substation in secondary circuit,adopt innovative methods to design and implement secondary circuit,ensure the reliable operation of secondary circuit,play its role in protecting electric equipment and improving power supply reliability.The academic research on secondary circuit of substation relay protection mostly takes traditional substation as the research object,and lacks analysis on intelligent substation.At the same time,the research on the secondary circuit of relay protection by researchers mostly focuses on the on-line state monitoring of the secondary circuit and troubleshooting of hidden troubles,and lacks all-round analysis on the design,debugging and application of the secondary equipment of relay protection in intelligent substations.Based on this,this topic will take the secondary circuit of substation relay protection as the research object,starting from four aspects of concept,design,implementation and testing,to clarify the effective implementation measures of the secondary circuit.In terms of the concept analysis of the secondary circuit of relay protection,the definition,function and type of the secondary circuit of relay protection are clearly defined,so that power enterprises realize the importance of the secondary circuit of relay protection.In the aspect of relay protection secondary circuit design,the main points of secondary circuit design are elaborated,and the design methods of conventional control module,conventional signal module,AC current and voltage module and computer monitoring module are defined,which provide guidance for technical personnel to carry out design work.Regarding the implementation of the secondary circuit of relay protection,taking the newly-built substation project carried out by Xing 'an Power Supply Company of the State Grid as an example,the implementation points of the secondary circuit of relay protection are summarized.Technical personnel shall specify the screen assembly scheme,equipment layout scheme and station power system scheme of the secondary circuit,and do a good job in the layout,installation and debugging of power equipment.In the secondary circuit test of relay protection,the above-mentioned implemented secondary circuit of relay protection is selected,and the control circuit,open-in circuit and open-out circuit are comprehensively tested to ensure accurate installation of the secondary circuit and provide conditions for reliable operation.Finally,taking the intelligent substation of Xing 'an Power Supply Company of the State Grid as an example,the characteristics of the secondary circuit are elaborated,the differences between the intelligent substation and the traditional substation are clarified,the key points of debugging and inspection of the intelligent substation are analyzed,and the visual type of the secondary circuit is elaborated,which provides reference for the design,implementation and use of the relay protection secondary circuit in power enterprises.Through the research of this topic,we can provide power supply enterprises with experience in the construction of relay protection secondary circuit,enrich the theoretical research content of secondary circuit,and fill in the research gaps.