Research And Application Of Online Five-prevention System In Substation

Threatening the safe operation of power equipment and electrical misoperation, it may lead to a large area power outage, power equipment damage, the oscillation of the system collapse, and even accidents occurred. In order to realize the safe and reliable operation of power equipment, prevent the occurrence of electrical misoperation, the electricity sector impose high voltage switch equipment must be anti misoperation device installation, in order to achieve the "five anti" requirements, namely: to prevent the error separation and combination of circuit breaker; prevent the load points, isolating switch; prevent mistakenly charged interval; prevent charged hang the ground; prevent with grounding wire switching.In this paper, a comprehensive summary of the anti misoperation locking system is currently widely used in substation, introduces the development process of anti misoperation locking system, the study of various anti maloperation system principle and realization process of the anti misoperation, analysis of each kind of anti misoperation system advantages and existing problems, and based on this, points out that the anti maloperation system should be the network system, the realization of online electromagnetic lock detection and automatic control of the direction of development, combined with 110 k V an Pu substation online five prevention examples of the application of engineering technology, the online five prevention communication technology; online five prevention system design; the station control layer Online five prevention technology; interlayer online five prevention technology; process layer online five anti technology in-depth analysis, and summarizes its should continue to improve in the power system application process in place, online five prevention structure of each layer consists of the following:The station control layer online five prevention main monitoring machine, distributed network equipment, responsible for the entire online five prevention system of command and operation. Its core technology is online five prevention software system, the establishment of editors and five anti logic library the system responsible for the operation of the interface.Interlayer online five prevention is mainly control, protection of transformer substation apparatus judging function through its own five anti logic control in electrical series controlled equipment in the operating circuit five preventing lock points, so as to achieve the purpose of controlling the false operation of device. Spacer devices in accordance with the IEC 61850 standard construction, the use of GOOSE to implement device and protection of each measurement and control device is arranged between the five locking information transmission, the use of MMS to achieve the control of the five anti blocking node.The process layer will be in the circuit breaker, isolating switch, the traditional local actuator(such as control cabinet) five latching node, automatic air switch and online five prevention special locks to achieve real-time transmission of five anti channeling information into two circuits in electrical, achieve true online five prevention functionAt the end of the paper 110 k V an Pu substation online five prevention operation data technology three years are analyzed and summarized, proved that online anti misoperation system has high safety, it with the seamless integrated substation automation system, all data on the same platform, the system is simple and clear, and can use the interlayer anti misoperation prevention is realized error system at multiple levels, even if all the fault control layer computer stations, still can achieve real-time anti misoperation locking device level depend on the control layer of the device, is a very stable and reliable anti misoperation system, provides an important guarantee for the whole power grid security, also have very good scalability and interoperability, laid a solid foundation for the development of power grid, to meet the needs of the future advanced substation management.