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Power distribution system reliability evaluation method and system considering instantaneous power failure event

A power distribution system and reliability technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of not considering the reliability of the power distribution system and the inability to establish a general model for the reliability evaluation of active power distribution systems. To achieve the effect of standardizing reliability management

Pending Publication Date: 2022-06-28
SHANGHAI MUNICIPAL ELECTRIC POWER CO +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method does not consider the impact of instantaneous power outages on the reliability of the distribution system, and does not take into account the impact of distributed power supply / microgrid access on the reliability of the distribution system, so it is impossible to establish a general model to meet the reliability of active distribution systems. assessment requirements

Method used

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  • Power distribution system reliability evaluation method and system considering instantaneous power failure event
  • Power distribution system reliability evaluation method and system considering instantaneous power failure event
  • Power distribution system reliability evaluation method and system considering instantaneous power failure event

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Embodiment 1

[0059] In the present embodiment, a method for evaluating the reliability of a power distribution system considering an instantaneous power failure event, the method includes the following steps:

[0060] (1) Based on the historical data of the power distribution system, describe the graph network model of the power distribution system; each component in the power distribution system is regarded as an object, and its attributes are expressed as the attributes of the components. Components representing protection devices have features such as device type (i.e. fuses, circuit breakers, reclosers, sectionalizers / section switches, etc.), fault outage / isolating device identifiers, normally open / normally closed status, device operating / switching times , fault clearing time, fault information statistics and other attributes. Assuming that the distribution network is radial, this fault has been cleared / repaired before the next fault occurs. Components representing busbars and lines h...

Embodiment 2

[0143] A power distribution system reliability assessment system considering instantaneous power failure events in this embodiment includes a pre-stage data processing module, a load point reliability analysis module, and a power distribution system reliability analysis module, wherein:

[0144] The early data processing module is used to describe the graph network model of the power distribution system according to the historical data of the power distribution system; each component in the power distribution system is regarded as an object, and its attributes are represented as attributes of the components. Components representing protection devices have features such as device type (i.e. fuses, circuit breakers, reclosers, sectionalizers / section switches, etc.), fault outage / isolating device identifiers, normally open / normally closed status, device operating / switching times , fault clearing time, fault information statistics and other attributes. Assuming that the distributi...

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Abstract

The invention discloses a power distribution system reliability evaluation method considering an instantaneous power failure event, and the method comprises the steps: depicting a graph network model of a power distribution system based on the historical data of the power distribution system; setting a fault type of the power distribution system, and obtaining a fault occurrence probability of the corresponding fault type; analyzing the influence of the fault type on each load node, and respectively obtaining a load node set which has the influence on each fault type; evaluating the reliability of each load node under the reliability event considering the instantaneous power failure event; and performing reliability evaluation on the power distribution system according to the reliability evaluation result of the reliability event of each load node. The load node reliability and the power distribution system reliability in different fault scenes are fully considered by considering the instantaneous power failure condition, thereby being beneficial to mastering the reliability level of power consumers, analyzing weak links of the power distribution system and standardizing the reliability management of the power distribution system. And scientific and reasonable guidance of formulation of a novel power system planning and design scheme and a reward incentive mechanism is facilitated.

Description

technical field [0001] The invention relates to reliability evaluation of distribution network, in particular to a method and system for reliability evaluation of distribution system taking into account instantaneous power failure events. Background technique [0002] With the massive access of power electronic equipment on the demand side, the problems of voltage sag and instantaneous power failure have received more and more attention in the reliable operation of new power distribution systems. However, at present, the indicators used by power regulators and power supply companies to evaluate the reliability of power distribution systems are mostly the average power outage time and frequency for continuous power outages, which cannot provide reasonable suggestions for system upgrades in a scientific and comprehensive manner. New challenges for reliability assessment of electrical systems. The existing research results are mostly oriented to the continuous power outage sce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J3/14H02J3/24H02J3/46G06F17/11
CPCH02J3/381H02J3/388H02J3/144H02J3/24H02J3/466G06F17/11H02J2203/20H02J2300/40H02J2310/60
Inventor 卫思明尹宏旭李渊戴人杰蒋利明张玮陈永华宋平张琪祁
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO