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A high-penetration renewable energy cluster division method considering flexibility

A renewable energy, high-permeability technology, applied in the direction of climate change adaptation, single-network parallel feeding arrangement, etc., can solve the problems of increasing demand for renewable energy output ramping power and decreasing ramping capacity of adjustable resources, achieving Effects of reducing cluster flexibility requirements, good flexibility balance characteristics, and improving reliability and economy

Inactive Publication Date: 2021-05-18
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • A high-penetration renewable energy cluster division method considering flexibility
  • A high-penetration renewable energy cluster division method considering flexibility
  • A high-penetration renewable energy cluster division method considering flexibility

Examples

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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 the flexibility supply and demand model including the cluster flexibility demand model and the cluster flexibility supply model is established according to the source load of the distribution network;

[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,...

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Abstract

The invention discloses a high-permeability renewable energy cluster division method considering flexibility. The invention establishes a flexible supply and demand model, and aims at the problem of power distribution network planning taking into account operation control requirements, respectively proposes a cluster flexibility supply and demand balance index and a flexibility balance time index from the flexibility balance demand and flexibility balance time characteristics, and combines it to reflect the cluster The modularity index of structural characteristics establishes a cluster division index system that considers the dynamic characteristics of cluster flexibility and balance. The advantages of the present invention are: it can fully take into account the flexibility resource adjustment capability of the source, network and load, comprehensively consider the characteristics of the node coupling structure, further exert the autonomous capability of the cluster, reasonably divide the cluster, reduce the demand for cluster flexibility, and is beneficial to improve Rapidity and accuracy of distribution system operation regulation under the background of high penetration renewable energy access.

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 Patents(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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