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Voltage sag monitoring device configuration method considering dynamic network reconfiguration (DNR)

A monitoring device and dynamic reconfiguration technology, applied in measurement devices, circuit devices, AC network circuits, etc., can solve problems such as reducing the observability of voltage sags, and achieve the effect of high engineering application value

Active Publication Date: 2020-02-04
SICHUAN UNIV
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Problems solved by technology

However, the actual situation is that even if the connection topology of each line in the power grid is known, the application of DNR will directly affect the change of the network topology. At this time, the impedance matrix of the power grid will change, and the formula for short-circuit calculation needs to be changed accordingly. may reduce the observability of voltage dips

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  • Voltage sag monitoring device configuration method considering dynamic network reconfiguration (DNR)

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[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0042]As the economic loss of production caused by voltage sag is becoming more and more serious, it is necessary to install a voltage sag monitoring device. However, due to cost issues, it is not necessary to install voltage sag monitoring devices on all buses. Therefore, it is of engineering significance to study the optimal configuration of voltage sag monitoring devices. Existing studies are all carried out under a certain power grid topology when optimizing the configuration of monitoring points. But the actual situation is that the application of DNR will directly affect the change of the network topology, resulting in the change of the impedance matrix of the power grid, and the formula of short-circuit calculation also needs to be changed accordingly, which may reduce the observability of voltage sag. The invention is a meth...

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Abstract

The invention discloses a voltage sag monitoring device configuration method considering dynamic network reconfiguration (DNR). The method is characterized in that voltage sag monitoring devices are optimally configured under the premise that the DNR is considered; monitoring device configuration modes under various network topologies are firstly calculated; and obtained optimal configurations areintegrated to obtain final optimal configurations. The method disclosed by the invention has the advantages that under the premise of the minimum number of the installed monitoring devices, voltage sags in a whole power grid are observable when the power grid is under any typical topology obtained through the DNR, so that higher engineering application value is achieved.

Description

technical field [0001] The invention relates to the field of voltage sag monitoring, in particular to a method for configuring a voltage sag monitoring device considering dynamic reconfiguration of network topology. Background technique [0002] The investment of a large number of sensitive equipment in modern power systems has put forward higher and higher requirements for power quality, and the production economic losses caused by voltage sags have become increasingly serious, and users are paying more and more attention to voltage sags. Voltage sag amplitude, duration, voltage sag frequency and other characteristics are important basis for analyzing voltage sag and formulating voltage sag control plan. Installing monitoring devices in the power grid is an effective way to obtain the characteristics of voltage sag events, locate the source of voltage sag disturbances, and grasp the level of system voltage sags; however, due to the high installation cost, it is impossible a...

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Application Information

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IPC IPC(8): G01R19/00G01R31/50G01R31/08H02J3/00
CPCG01R19/0084G01R31/086H02J3/00
Inventor 汪颖邓凌峰肖先勇郑子萱
Owner SICHUAN UNIV
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