Power distribution network reconstruction and island division method containing distributed power supply

A distributed power supply and distribution network reconfiguration technology, applied in the direction of electrical components, circuit devices, AC network circuits, etc.

Active Publication Date: 2015-09-23
SOUTH CHINA UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

In addition, with the acceleration of urban and rural construction, a large number of distributed power sources, the continuous expansion of the power distribut...

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  • Power distribution network reconstruction and island division method containing distributed power supply
  • Power distribution network reconstruction and island division method containing distributed power supply
  • Power distribution network reconstruction and island division method containing distributed power supply

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Embodiment 1

[0046] A distribution network reconfiguration and islanding method with distributed power generation, according to figure 1 The realization of the flow chart shown includes the following steps:

[0047] 1. Take the 87-node system as an example to realize the reconstruction of the distribution network including distributed power sources. The system structure is as follows figure 2 shown. Calculation example-87 includes 5 substation power points and 10 distributed power access points. The total capacity of distributed power in this system is about 20% of the system capacity, and its installation location is generally selected at the node with heavy load. The structural parameters of the 87-node system grid structure and the load at a certain period of time are shown in Table 1, and the grid-connected points and output upper limit of the distributed power generation are shown in Table 2.

[0048] Table 1. Raw data of 87-node power distribution system

[0049]

[0050]

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Abstract

The present invention provides a power distribution network reconstruction and island division method containing a distributed power supply. The method comprises the following content of introducing a complementarity constraint condition in a power distribution network reconstruction model containing the distributed power supply, and carrying out the model solution by utilizing a modern interior point method of fast speed and strong robustness; for the distributed power supply which can be in the flexible grid connection or island operation, according to a power supply characteristic of the distributed power supply and a power distribution network island operation characteristic, establishing a power distribution network island division model considering the load priority, the controllability/uncontrollability and the power balance constraint. Compared with a conventional island division scheme obtained by a searching method, the model of the present invention adopts a mathematical optimization techniques to solve, the obtained island scheme does not need the additional verification and correction, the power supply of the important loads can be recovered rapidly and reasonably, the operation electric energy loss of a power distribution system is reduced, and the economy and reliability of the power distribution network operation are improved.

Description

technical field [0001] The invention relates to the technical field of distributed power sources, in particular to a model and method for reconfiguring a distribution network including distributed power sources and an island division method. Background technique [0002] With the increasing shortage of energy and the aggravation of environmental pollution, the country has put forward higher requirements for energy saving and emission reduction and improving power supply efficiency. This requires power companies to reduce power grid losses and improve energy utilization efficiency. However, the loss of distribution networks is The loss of the power system plays a major role, so reducing the operating loss of the distribution network is the key to improving energy efficiency. In addition, with the acceleration of urban and rural construction, a large number of distributed power sources, the continuous expansion of the distribution system scale and the rapid growth of load, the...

Claims

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Application Information

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IPC IPC(8): H02J3/00G06Q10/04G06Q50/06
CPCY02E40/70Y04S10/50
Inventor 黄伟张勇军黄向敏
Owner SOUTH CHINA UNIV OF TECH
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