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Topological observability analytical method based on adjacency list with injection measurement boundary nodes

A technology of boundary nodes and analysis methods, which is applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems of affecting the accuracy of state estimation and increasing the configuration of pseudo-quantity measurement, so as to achieve small algorithm complexity and reduce the configuration of pseudo-quantity measurement , high efficiency effect

Inactive Publication Date: 2012-07-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0010] The above two types of missed judgments exist in the observability analysis method based on power flow determination in the AC system, which leads to more false measurement configurations and seriously affects the accuracy of state estimation.

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  • Topological observability analytical method based on adjacency list with injection measurement boundary nodes
  • Topological observability analytical method based on adjacency list with injection measurement boundary nodes
  • Topological observability analytical method based on adjacency list with injection measurement boundary nodes

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Embodiment Construction

[0044] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following descriptions are only illustrative, and not intended to limit the scope and application of the present invention.

[0045] like image 3 Shown is a flow chart of the topology observability analysis method based on the adjacency list of the boundary node with injection measurement, and the topology observability analysis method based on the adjacency list of the boundary node with injection measurement includes the following steps:

[0046] 1) Form an initial measurement island; use branch power flow measurement to form an initial measurement island for the entire power network, and treat isolated nodes that are not connected to branch measurement as independent initial measurement islands;

[0047] 2) forming an adjacency list of boundary nodes with injection measurement, and merging the initial measurement island through...

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Abstract

The invention discloses a topological observability analytical method based on an adjacency list with injection measurement boundary nodes, which belongs to the technical field of operation and control of electric systems. The method includes the steps: firstly, forming initial measurement islands, namely using branch power flow measurement to form the initial measurement islands which form an integral electric network, wherein isolated nodes connected with no branch power flow measurement also need to be treated as independent initial measurement islands; secondly, forming the adjacency list with injection measurement boundary nodes, and combining the initial measurement islands through the adjacency list with injection measurement boundary nodes; thirdly, forming networks to be combined, and judging integral observability of the networks to be combined through the adjacency list with injection measurement boundary nodes; fourthly, combining the measurement islands which are integrally unobservable but locally observable in the networks to be combined; and fifthly, generating a pseudo measurement configuration scheme to prepare for state estimation. The topological observability analytical method has the advantages that pseudo measurement configuration is reduced, and precision of state estimation results is improved. Further, the pseudo measurement configuration is low in algorithm complexity and high in efficiency.

Description

technical field [0001] The invention belongs to the technical field of power system operation and control, in particular to a topology observability analysis method based on an adjacency table of a boundary node with injection measurement. Background technique [0002] Power system observability analysis refers to the determination of the range of power grid state variables that can be correctly calculated using existing measurement configurations in state estimation. In power system state estimation, if telecontrol data is lost or unavailable, there may be insufficient local measurements, making the system unobservable. In order to restore the observability of the entire network, automatic Adding pseudo-quantity measurement, the addition of pseudo-quantity measurement will reduce the reliability of EMS control decision-making, so the observability test should be carried out before state estimation. Observability analysis is the prerequisite to ensure that state estimation ...

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Application Information

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IPC IPC(8): H02J3/00
Inventor 张海波陈璐
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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