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Power distribution network D-PMU optimal configuration method considering node difference

A technology for optimizing configuration and distribution network, applied in the field of power system, can solve problems such as inapplicability of optimal configuration scheme, failure to consider node importance and installation conditions, etc.

Pending Publication Date: 2020-07-28
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In most of the existing algorithms, each node is treated equally, and the optimal D-PMU configuration scheme is obtained through optimization calculation only considering the grid topology, without considering the importance of nodes and installation conditions in actual projects, which may lead to The optimal configuration scheme is not applicable

Method used

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  • Power distribution network D-PMU optimal configuration method considering node difference
  • Power distribution network D-PMU optimal configuration method considering node difference
  • Power distribution network D-PMU optimal configuration method considering node difference

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Embodiment 1

[0039] In order to solve the problem that distribution network measurement data is scarce and considerable problems are serious, embodiments of the present invention provide a distribution network D-PMU optimal configuration method that is suitable for actual engineering applications and considers node differences, see Figure 1 to Figure 4 , see the description below:

[0040] S100: Establishing a distribution network node-branch association matrix and a node association matrix by using an association matrix method;

[0041] Wherein, the step S100 includes:

[0042] S1001: Define distribution network system node-branch correlation matrix R=[r ik ]:

[0043]

[0044] Among them, r ik Indicates the connection value between node i and branch k, that is, the connectivity. When i is connected to k, r ik = 1, otherwise r ik =0. It can be seen from the definition that when the switch of branch k is turned off, it is no longer connected to the two previously connected nodes,...

Embodiment 2

[0152] The distribution network D-PMU optimal configuration algorithm proposed by the present invention is applied to the actual distribution network system of Guangzhou Nansha Yuan'an Station. According to the given electrical main wiring diagram of the distribution network system, the corresponding electrical topology diagram is generated as follows: Figure 5 As shown, the node-branch correlation matrix and node correlation matrix are obtained by using the correlation matrix method, and the node-branch adjacency table is calculated by using the breadth-first search algorithm, and the number of branches connected to each node is obtained.

[0153] According to formulas (3), (4), (5), and (6), four single node vulnerability indicators of node degree, node cohesion degree, node betweenness and node closeness are calculated respectively for each node in a given system. Using the entropy method of formulas (7) and (8) to get d 1 ~ d 4 The objective weights of the four indicato...

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Abstract

The invention discloses a power distribution network D-PMU optimal configuration method considering node difference, and the method comprises the steps: obtaining a node-branch adjacency list of a power distribution network based on breadth-first search, and calculating four single node vulnerability indexes: the node degree, the node cohesion degree, the node betweenness and the node compactnessof the power distribution network; obtaining a comprehensive weight of the index based on the objective weight and the subjective weight obtained by the entropy method and the analytic hierarchy process; solving a node comprehensive vulnerability index by adopting TOPSIS-grey relational degree, and taking the node comprehensive vulnerability index as a node weight in the optimal configuration model; solving a D-PMU optimal configuration scheme meeting the complete observability of the system at one time by adopting adaptive inheritance; calculating an unobservable depth by adopting a method ofcombining depth-first search and Dicoski; sorting the one-time schemes according to the importance degree of the nodes, and reducing the unobservable depth stage by stage to obtain a staged D-PMU configuration scheme; and configuring D-PMU equipment stage by stage according to the priority sequence and the configuration scheme, obtaining the maximum measurement redundancy and improving the powerdistribution network state estimation precision is improved.

Description

technical field [0001] The invention relates to the field of power systems, in particular to a D-PMU (distribution network synchronized phasor measurement device) optimal configuration method in a distribution network system considering node differences. Background technique [0002] The distribution network has the characteristics of many nodes, complex network structure, and variable operation modes. With the gradual development of modern power electronics technology, the degree of informatization of the distribution network has gradually increased. The distributed generation (DGs) of wind power and photovoltaics A large number of connections and the rapid increase of flexible loads such as electric vehicles (Electric Vehicles, EVs) make the electrical quantity of the distribution network more complex, and bring great challenges to the monitoring, operation and control of the distribution network. The distribution network needs to sense its own operating status in real tim...

Claims

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Application Information

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IPC IPC(8): G06F17/16G06N3/12G06Q10/04G06Q10/06G06Q50/06
CPCG06F17/16G06N3/126G06Q10/04G06Q10/0639G06Q50/06
Inventor 孔祥玉袁枭枭袁智勇徐全李鹏王成山王玉婷尧静涛
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD