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Reactive voltage control partitioning method under wind power integration

A technology of voltage control partition and voltage regulation, used in reactive power compensation, AC network voltage adjustment and other directions

Inactive Publication Date: 2015-12-23
SHANDONG UNIV
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Problems solved by technology

Aiming at the volatility problem caused by wind power access, the electrical distance matrix under a single power flow section is used as the basis for partitioning instead of the expected matrix of electrical distance between nodes considering the probability characteristics of wind power

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  • Reactive voltage control partitioning method under wind power integration
  • Reactive voltage control partitioning method under wind power integration
  • Reactive voltage control partitioning method under wind power integration

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Embodiment Construction

[0058] The present invention is described in detail below in conjunction with accompanying drawing:

[0059] PQ node partition based on AP clustering algorithm:

[0060] First, the PQ node electrical distance expectation matrix of PQ node is introduced into the probability characteristic of wind power

[0061] Under the traditional power grid model, the method of using electrical distance to characterize the connection closeness between nodes is very mature. When the operating state and network parameters are determined, the deterministic electrical distance matrix between PQ nodes can be obtained from the Jacobian matrix. After wind power is connected to the grid, the electrical distance matrix under the same network structure will be uncertain. For this reason, this paper proposes to replace the electrical distance matrix under a certain power flow section with the electrical distance expectation matrix of the whole network considering the probability characteristics of win...

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Abstract

The invention discloses a reactive voltage control partitioning method under wind power integration. The method comprises the steps as follows: a whole network electrical distance expected matrix considering wind electricity power probability characteristics takes the place of an electrical distance matrix under one power flow section to be used as a partitioning basis; PQ node partitioning is achieved on the basis of AP clustering; the voltage regulation sensitivity of a PV node region considering the wind electricity power probability characteristics is defined by a perturbation method; PV nodes ranked on the basis of the region sensitivity are partitioned; the regional connectivity and controllability are firstly considered in node partitioning; and meanwhile, the condition that the PV nodes are classified into a PQ region which is the most sensitive in control can be ensured to the maximal extent. An index evaluation result shows that the partitioning scheme obtained by the method obtains a good effect; and an auxiliary reference can be provided for voltage control under wind power integration.

Description

technical field [0001] The invention relates to a partition method for reactive power voltage control under wind power access. Background technique [0002] Three-level voltage control has become a voltage control method generally recognized in power systems, and the practical application effect is good. The basis for its realization is the reasonable partitioning of system nodes. Therefore, an effective partition method is an important subject of voltage control. [0003] The methods of traditional voltage partitioning can be summarized into the following five categories: clustering algorithm; graph theory; intelligent heuristic algorithm; hybrid algorithm; other methods represented by structural feature analysis. The existing partitioning methods can be well applied to traditional power grids, but it will be challenging to apply to the grid partitioning where large-scale wind power access causes random changes in the power flow state. [0004] The cluster-based method i...

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Application Information

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IPC IPC(8): H02J3/16
CPCY02E40/30
Inventor 贠志皓周琼丰颖孙景文
Owner SHANDONG UNIV
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