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High-permeability renewable energy cluster division method considering flexibility

A renewable energy, high-permeability technology, applied in the direction of single-network parallel feeding arrangement, climate change adaptation, etc., can solve the problems of the reduction of adjustable resource climbing capacity and the increase of renewable energy output climbing power demand, etc.

Inactive Publication Date: 2019-11-08
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

On the one hand, the sharp fluctuation of renewable energy output leads to an increase in the net load climbing power demand of the cluster; on the other hand, some traditional power sources in the system are replaced by renewable energy, and the climbing capacity provided by the adjustable resources in the cluster is also reduced

Method used

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  • High-permeability renewable energy cluster division method considering flexibility
  • High-permeability renewable energy cluster division method considering flexibility
  • High-permeability renewable energy cluster division method considering flexibility

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Embodiment

[0068] Example: A high-penetration renewable energy cluster division method considering flexibility, such as figure 1 shown, and follow the steps below:

[0069] A: The cluster division criterion is defined as flexibility, and a flexible supply and demand model including a cluster flexibility demand model and a cluster flexibility supply model is established according to the distribution network source load;

[0070] The flexibility supply and demand model is expressed as follows:

[0071] A1: The cluster flexibility requirement is defined as the timing ramp-up power of the cluster payload:

[0072]

[0073] Among them, P l (t), P l (t-τ) represent the net load power of node l at time t and t-τ respectively, and the sum formulas represent the summation of all nodes in cluster i at this time; if It means that the cluster i has the flexibility requirement of upward climbing, if It means that the cluster i has a downward climbing flexibility requirement, and the cluster...

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Abstract

The invention discloses a high-permeability renewable energy cluster division method considering flexibility. The method comprises establishing a flexibility supply and demand model; based on flexibility balance demand and flexibility balance time characteristics, providing a cluster flexibility supply and demand balance index and a flexibility balance time index respectively; and by combining a modularity index reflecting cluster structure characteristics, establishing a cluster division index system considering cluster flexibility balance dynamic characteristics. The advantages are that thesource network load flexibility resource adjustment capability can be fully considered and the node coupling structure characteristics are comprehensively considered, so that cluster autonomy capability is given full play to, a cluster is reasonably divided, the cluster flexibility demand is reduced, and the speed and accuracy of operation and regulation of a power distribution system under the background of increasing complex high-permeability renewable energy access are improved favorably.

Description

technical field [0001] The invention relates to the field of distribution network flexibility planning for distributed access of large-scale renewable power sources, in particular to a high-penetration renewable energy cluster division method considering flexibility. Background technique [0002] The access to large-scale distributed renewable power poses a huge challenge to the planning and operation of traditional power distribution systems. The power distribution system has transformed from a traditional radial passive network to an active network containing a large number of distributed power sources. Complicated problems such as node voltage exceeding the limit, network loss increase, and power forwarding beyond the voltage level. The inherent strong uncertainty and volatility of renewable energy such as wind power and photovoltaics further increase the difficulty of system scheduling and control. [0003] In order to ensure the safe, stable, reliable and economical op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCY02A30/60
Inventor 丁明高平平毕锐胡迪张宇
Owner HEFEI UNIV OF TECH
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