A voltage sag source location system based on power grid equipment topology
A voltage sag source, voltage sag technology, used in electrical components, circuit devices, AC network circuits, etc.
Active Publication Date: 2019-11-29
STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +3
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Problems solved by technology
[0008] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a voltage sag source location system based on the topology of power grid equipment, which solves the problems of accurate location of voltage sag source, classification of system-side voltage sag causes and user-side voltage sag Technical problems such as the classification of the cause of the drop
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[0044] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention, but the examples cited are not intended to limit the present invention.
[0045] Such as figure 1 As shown, a voltage sag source location system of power grid equipment topology, including voltage sag event merger model, voltage sag event power grid equipment propagation model, voltage sag source identification model, system side voltage sag cause classification model And the user-side voltage sag cause classification model.
[0046] Such as figure 2 , 3 As shown, the voltage sag event merger model merges multiple voltage sag records into one voltage sag event. The specific steps are as follows:
[0047] S01: Start with a certain voltage sag record, search for a voltage sag record within a period of time t0 before and after t...
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The invention discloses a power grid equipment topology-based voltage sag source positioning system, and aims to solve the technical problems of accurate positioning of a voltage sag source, reason classification and the like. On the basis of power grid equipment and voltage sat record, voltage sag event combination and voltage sag event power grid equipment spreading modeling are respectively performed on voltage sag source identification, a power grid equipment topological mode and a voltage sag source identification flow are designed on the basis of the model, system-side voltage sag reasonclassification modeling is performed according to power grid fault data and power grid lightning data, a system-side voltage sag reason classification flow under an instantaneous fault and a permanent fault is proposed, and a large-user voltage sag reason classification flow is proposed according to a user-side load constituent and a load rule. By the power grid equipment topology-based voltage sag source positioning system, the problems of accurate positioning of the voltage sag source, system-side voltage sag reason classification and user-side voltage sag reason classification are solved.
Description
Technical field [0001] The invention relates to a voltage sag source positioning system based on power grid equipment topology, belonging to the technical field of power quality monitoring. Background technique [0002] With the continuous development of modern communication technology, storage technology and system integration technology, a huge voltage sag monitoring network is gradually constructed and improved, which brings strong data support for power quality analysis and governance, and improves the reliability and safety of power grid operation. In terms of sex and economic benefits, it has an irreplaceable role. [0003] In the process of understanding voltage sags in China, the terms used successively include: "voltage sag", "voltage sag" and "voltage sag". Since 2009, the term has been unified as "voltage sag". In December 2013, the national standard GB / T 30137-2013 "Power Quality Voltage Sag and Short-term Interruption" was promulgated, and the voltage sag (voltage sa...
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IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 李斌郭雅娟宗海峰张军史明明李志刘玉林陈锦铭陈兵范忠孙德鹏邓洁清何剑
Owner STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST