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Power supply capacity-based safety classification method of active power distribution network

A technology of active distribution network and safety level, which is applied in the field of safety evaluation of level division

Active Publication Date: 2016-11-09
无锡享源信息科技有限公司
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Problems solved by technology

[0003] The traditional distribution network generally deals with the uncertainty of the system through the reconstruction of the distribution network structure and a large load margin to ensure the reliability of power supply, while the power supply security of the active distribution network is limited by the intermittent power supply and the availability of existing resources. The impact of new features such as environmental conditions, the challenge lies in how to complete the comprehensive utilization of existing resources through information communication systems and advanced measurement equipment to integrate distributed power sources, energy storage systems, and information resources of active loads.

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  • Power supply capacity-based safety classification method of active power distribution network
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Embodiment Construction

[0094] The present invention will be further described below in conjunction with accompanying drawing:

[0095] combine figure 1 , figure 2 and image 3 , the specific steps of the calculation method of the present invention are as follows:

[0096](1) Considering the fluctuation of distributed power output and the capacity of the grid connected to the power grid, the load loss analysis of the active distribution network is carried out, the load loss situation of the power grid is judged, and the load loss rate is calculated;

[0097] When the capacity of the distributed power supply provides a large proportion of power load for the grid, once the output of the distributed power fluctuates greatly, if the output suddenly drops sharply, it is possible to lose part of the load. In this case The formula for calculating the load loss rate index (expressed in LLR) is:

[0098] Among them, P iloss is the load loss of node i, m is the number of load loss nodes, P j is the lo...

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Abstract

The invention relates to a power supply capacity-based safety classification method of an active power distribution network. According to the method provided by the invention, the characteristics of the active power distribution network are fully considered; a multi-character maximum power supply capability solving model of a node is built; and related constraints and voltage constraints of a distributed power supply and an energy storage system are considered, nonlinear constraints are converted into a rotating cone constraint form and calculation is carried out through a cone optimization method, so that the calculation speed and accuracy are improved. Meanwhile, a safety evaluation index system suitable for the active power distribution network is defined and built on the basis of static security analysis, so that a safety classification model of the active power distribution network is built; and effective evaluation on the safety of the active power distribution network is achieved.

Description

technical field [0001] The invention relates to a safety evaluation method of an active distribution network, in particular to a safety evaluation method based on power supply capacity and safety level division. Background technique [0002] With the continuous improvement of the penetration rate of distributed energy in the distribution network, the operation control mode of the traditional distribution network can no longer adapt to the access of today's high-penetration distributed energy, which brings many challenges in technology and management. The problem determines that it is necessary to evolve to an active distribution network. Therefore, in the 2008 International Conference on Power Distribution and Distributed Generation Special Committee, the C6.11 project team clearly proposed in the research report "Operation and Development of Active Distribution Networks" that active distribution networks and The concept of distributed energy, and Europe has established the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06H02J3/00H02J2203/20
Inventor 马丽叶闫桂红卢志刚郭凯
Owner 无锡享源信息科技有限公司
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