Method and device for predictive accident analysis of transmission network

A technology for predicting accidents and transmission networks, applied to circuit devices, electrical components, AC network circuits, etc., can solve problems such as ignoring the impact of power transfer, false alarms, accident expansion, etc., and achieve the effect of less calculation and communication costs

Active Publication Date: 2019-10-22
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing predictive accident analysis methods of the transmission network only make a very rough estimate of the impact on the distribution network: in the analysis, only the influence of the distribution network on the power injection at the low-voltage bus of the distribution station is considered, but the distribution network is ignored. The effect of power transfer caused by topology changes
With the rapid development of information and communication technology, the distribution network has been equipped with more and more online automatic control devices, which makes the topology of the distribution network may change in real-time operation, and the existing transmission network is used to predict accidents. Analytical methods can lead to false alarms
One of the main reasons for the blackout accident at the University of Southern California in 2011 was that the existing accident analysis program for the transmission network did not consider possible changes in the distribution network during operation, which caused false alarms and eventually led to serious expansion of the accident.
Such a huge computational and communication cost makes it difficult to apply the method online to the predictive accident analysis program of the actual power system

Method used

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  • Method and device for predictive accident analysis of transmission network
  • Method and device for predictive accident analysis of transmission network
  • Method and device for predictive accident analysis of transmission network

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Embodiment 1

[0021] figure 1 It is a flow chart of a method for predictive accident analysis of a transmission network provided by Embodiment 1 of the present invention. This embodiment is applicable to the situation where the predictive accident analysis of a transmission network is performed based on an equivalent model of a distribution network that takes into account topology changes of a distribution network , the method can be performed by a device for predictive accident analysis of the transmission network, the device can be implemented by software and / or hardware, and generally can be configured in the transmission network control center, the method specifically includes the following steps:

[0022] Step 110, receiving the distribution network equivalent model sent by the distribution network control center.

[0023] When the distribution network topology changes, the distribution network control center can calculate the equivalent model of the distribution network according to t...

Embodiment 2

[0037] image 3 It is a flow chart of a method for predicting accident analysis of a transmission network provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above-mentioned embodiments. In the forecasted accident analysis model, the power flow calculation" has been optimized. This method specifically includes the following steps:

[0038] Step 310, receiving the distribution network equivalent model sent by the distribution network control center.

[0039] Wherein, the distribution network equivalent model includes at least one boundary node, the boundary node is a node connected to the distribution network and the transmission network, and each boundary node is grounded through an equivalent parallel admittance, if the boundary node is not less than Two, then every two boundary nodes are connected by equivalent series admittance.

[0040] Step 320, acquiring the current measured voltage and current measured power of each of t...

Embodiment 3

[0083] Figure 4 It is a flow chart of a method for predicting accident analysis of a power transmission network provided by Embodiment 3 of the present invention. This embodiment is a preferred example based on the above embodiments. The method specifically includes the following steps:

[0084] Step 410, the distribution network control center calculates the distribution network equivalent model according to the Gaussian elimination method, and sends the distribution network equivalent model to the transmission network control center.

[0085] The distribution network equivalent model is as figure 2 shown. The distribution network equivalent model includes at least one boundary node, the boundary node is a node connected to the distribution network and the transmission network, and each boundary node is grounded through an equivalent parallel admittance, if the boundary node is not less than two , then every two boundary nodes are connected by equivalent series admittance...

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Abstract

The invention discloses a power transmission network contingency accident analysis method and device. The method comprises the following steps: a power distribution network equivalence model sent by a power distribution network control center is received, the power distribution network equivalence model is combined into a power transmission network contingency accident analysis model, and power flow calculation is conducted; the contingency accident analysis model comprises a plurality of contingency accidents, and operation safety of a power transmission network under each contingency accident can be determined according to a power flow calculation result under each contingency accident. According to the power transmission network contingency accident analysis method and device, influence exerted by power distribution network topology change in power transmission network accidents is approximated via power distribution network equivalence, and accurate power transmission network contingency accident analysis results can be obtained at very low calculation and communication costs.

Description

technical field [0001] Embodiments of the present invention relate to power system operation and control technologies, and in particular to a method and device for predictive accident analysis of a transmission network. Background technique [0002] The existing predictive accident analysis methods of the transmission network only make a very rough estimate of the impact on the distribution network: in the analysis, only the influence of the distribution network on the power injection at the low-voltage bus of the distribution station is considered, but the distribution network is ignored. The effect of power transfer caused by topology changes. With the rapid development of information and communication technology, the distribution network has been equipped with more and more online automatic control devices, which makes the topology of the distribution network may change in real-time operation, and the existing transmission network is used to predict accidents. Analysis m...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06H02J2203/20
Inventor李正烁孙宏斌郭庆来
OwnerSHENZHEN GRADUATE SCHOOL TSINGHUA UNIV