The Typical Motion Analysis And Optimization Of Integrated Automation System For500kV Substation In Fuzhou

The so-called integrated substation automation is generally refers to: the use ofadvanced communication technology, DSP technology, computer technology,electronic technology, automation of substation in operation of operating equipment,an important power transmission line. Mainly include: control, monitoring,scheduling, protection, measurement. Due to power demand increases greatly, thetraditional substation forms has to meet the demand for capacity of power grid cannow power system. The integrated substation automation because of its high degreeof automation, the accident treatment response capability, allowing access toequipment capacity and faster promotion. In the substation automation system,ensure the stable operation of power grids, the decisive factor is the integratedautomation system protection, it can detect the fault signal and the accurate fault, toavoid accident scope and influence power supply reliability.500kV substation due tothe high voltage, transformer capacity, line and the complex structure, reliable actionof the protection is becoming more and more important.500kV substation protection system in accordance with the different ways canbe divided into different types. In view of protected objects, can be divided intotransmission and distribution line protection and main equipment protection(transformer, bus, capacitors, etc.). Aiming at the protection function, can be dividedinto short circuit protection or non-electricity protection. Short circuit protection isthe main protection, backup protection, assistance and protection etc.. Non electricalabnormal protection mainly has overload protection, loss of excitation protection,frequency more protection and non-protection phase running. According to the signalto divide, can is divided into analog and digital relay protection. Such as crystalcatheter type, rectifier and integrated circuit protection devices are directly reflect thecontinuous signal input signal, the analog type protection; if the protection devicesusing ARM and computer, the analog information through sampling and analogdigital conversion, is a digital protection. The action principle to points, can bedivided into the current, voltage, distance, direction, differential, zero sequence protection. These protection according to different principles from the quantity ofelectricity and other aspects of equipment for monitoring, and ensure the normaloperation of the500kV substation.Although the500kV transformer substation supposes the equipment to protectcomprehensively, may carry on the surveillance from each aspect to the equipment.But, as a result of the synthesis automation technology complexity, each kind ofprotection and the signal coordination is extremely difficult, an equipment or thetransformer substation two wiring have certain malpractices, in its protectionsynthesis automation unavoidably appears the place which some are unsatisfactory,the movement personnel to protects first floor principle grasping to be also few.Atthe same time, follows three volumes of five big footsteps, the Jiangxi500kVtransformer substation nobody duty pattern also basically determined that, as a resultof the monitoring report responsibility change, the500kV transformer substationsynthesis automated system also needs to make the corresponding adjustment tomeet the new monitoring need, has mainly completed following work in view ofabove question this article:(1) The500kV substation protection of the typical causes of actionWhen a substation equipment or lines when needed by the internal or externalfault removal and protection measured its electrical capacity and internal analyses, ifthe tripping conditions will give device circuit breaker tripping signal, failure toreliably cut off, to avoid accidents to expand. Microcomputer-based protectionprocedures prepared by the manufacturer, however, power failure occurs during theproduction run can only find brief messages from protector, failure causes andprinciples could not be immediately learned, have seriously affected the speed ofprocessing.500kV transformer substation in this paper a typical mathematical modelanalysis of protection action, and calculated using examples, the production has a lotof experience.(2)Improve the protection reliability in order for electric power system canremain stableSo if there is no relay protection, any electrical equipment that is unsafe forrunning, performance gains on relay protection facilities, can greatly enhance network security. Electrical devices may not function properly if the situation arises,signal abnormal operation signal sent in a timely manner, so as to ensure timelyprocessed. Automatic safety device in power system can be recovered in the fastesttime power system, effectively preventing a widespread blackout, if the stability ofthe power system frequency control, they are very easy to make voltage collapse. Atpresent, the substation integrated automation technology has yet to be promoted, sothat protected part of the mating process will inevitably be dead zones, this paperdiscusses the history of500,000volts transformer substation of Fuzhou fault analysis,analysis of movements, an analysis of the gaps, put forward reasonable proposals,improve the protection reliability.(3)Explore the500,000-volt substations in the unattended mode ofmasterstation optimization as the country’s power grid,"three-five" systemimplementation of the500kV transformer substation in unattended mode had beenlaunched in Jiangxi province.Original substation monitoring, operations were transferred to the provincetransferred the rights monitor. In order to accomplish monitoring the transfer of theright to, and ensure the normal operation of the monitoring system,500kV substationintegrated automation system needs to be a corresponding transformation.