A da protection method for smart distribution network
A technology of intelligent distribution network and protection function, which is applied in the field of DA protection and fault handling of intelligent distribution network in terms of power supply and safety, and can solve the problems that cannot be separated from the main station to automatically handle faults, protection schemes that cannot distinguish fault types, and multi-point faults Problems such as existing problems in the handling of problems, to achieve the effect of good exception handling, solving the difficulties of system annual maintenance, and easy to understand
Active Publication Date: 2011-12-28
烟台科大正信电气有限公司
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[0004] The intelligent distribution network protection scheme is the key point of the distribution network automation technology. In addition, the intelligent distribution network protection scheme currently popular in the market has many shortcomings. The protection scheme cannot distinguish the fault type; Processing mode, all power supply lines are processed in a uni...
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[0021] exist figure 1 Among them, it is a DA protection method for intelligent distribution network. DA protection function is set between different power points. The fault information is uploaded to the DA controller with DA controller function or the distribution network master station. According to the processing of the DA controller, fault detection, location, isolation and recovery control are realized. When a fault occurs in the distribution network, the distribution network terminal monitors the fault current or line loss and overvoltage information, forms a fault information report, and uploads it to the DA controller or master station with the DA controller function. The DA controller or master station locates the location of the fault according to multiple fault information reports within a certain period of time combined with network topology analysis; the power distribution master station or DA controller locates the switches on both sides of the fault according t...
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The invention relates to the field of protection of an intelligent distribution network of an electric power system, in particular to a digital-analog (DA) protection method for the intelligent distribution network in the aspects of power supply, fault processing and safety. A DA protection function is set between different power supply points and can be used for determining the corresponding fault according to fault detection information of voltage and current of a terminal of the distribution network between the power supply points and uploading the fault information to a DA controller witha DA controller function or a distribution network master station, and the key of the intelligent distribution network is fault recognition, fault positioning, fault isolation and non-fault area power supply restoration, so the protection method for the intelligent distribution network is established on the basis of the core to remove faults through the fault recognition of the automatic terminalof the distribution network; a fault point is positioned according to the uploading position of the fault information; after the fault point is positioned, switches or circuit breakers at the two ends of the fault are tripped, so a fault area is isolated; and an interconnection switch is turned on, the power supply of a non-fault area is restored, and the practical process of the fault processingof the distribution network is promoted.
Description
technical field [0001] The invention relates to the protection field of an intelligent distribution network of a power system, in particular to a DA protection method for an intelligent distribution network in terms of power supply, fault handling and safety. Background technique [0002] Distribution automation is an inevitable trend in the modernization of the power system. It is the application of modern electronic technology, communication technology, computer and network technology to securely integrate real-time information, offline information, user information, grid structure parameters, and geographic information of the distribution network to form a The complete automation and management system realizes the monitoring, protection, control and power distribution management system in the normal operation of the distribution network and in case of accidents. The significance lies in monitoring distribution network faults or abnormal operation conditions, quickly detec...
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Inventor 任建福
Owner 烟台科大正信电气有限公司
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