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Optimal island dividing calculation method of distributed power distribution network

A distributed power supply and island division technology, applied in computing, resources, electrical components, etc., can solve the problems of limited contribution to clean power generation, distribution network operation mode and complex management, and island operation is not allowed

Inactive Publication Date: 2018-07-20
STATE GRID SHANDONG ELECTRIC POWER CO SHOUGUANG POWER SUPPLY CO +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the continuous improvement of DG penetration rate, the operation mode and management of distribution network are also more complicated. The current DG grid-connected regulations do not allow island operation, and require that DG must withdraw quickly when a fault or disturbance occurs, resulting in the limitation of DG's contribution to the distribution network. in clean power generation

Method used

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  • Optimal island dividing calculation method of distributed power distribution network
  • Optimal island dividing calculation method of distributed power distribution network
  • Optimal island dividing calculation method of distributed power distribution network

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Experimental program
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Embodiment

[0050] An embodiment, a calculation method for optimal island division of a distributed power distribution network, including a modeling stage, an island search stage, and a verification stage.

[0051] The modeling stage is to transform the original distribution network containing DG into a connected graph with edge weights. The weight of an edge is determined by the power of the load connected to the edge and the importance of the load. The weight can be determined by According to the multi-index quantitative evaluation method, the greater the importance, the smaller the calculated weight, and the higher the priority of the corresponding load.

[0052] In the island search stage, the improved dynamic programming algorithm is used to search the connected graph, and the power balance area is selected according to the capacity of the DG, the weight of the edge and the size of the load power, and the island operation separation point is obtained.

[0053] The verification stage ...

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Abstract

The invention discloses an optimal island dividing calculation method of a distributed power distribution network. According to the method, at the step three, evaluation function calculation and optimal island searching are carried out, so that the space complexity is reduced; on the basis of combination of an inclusion-exclusion principle, state simplification is carried out on a combination optimization problem, so that the problem is completed in polynomial time; and solution is completed in time and polynomial space, so that the computing speed is increased. The method has the following advantages: an improved dynamic programming algorithm is put forward to carry out island division solution; a reasonable plan islanding scheme can be calculated quickly and accurately; the maximum powersupply recovery is taken as an objective and the importance of load is considered comprehensively; the problem solving speed and precision are improved effectively; and an important scientific basisis provided for dynamic planning of a distribution network.

Description

technical field [0001] The invention relates to the field of power grid operation and planning, in particular to a planning calculation method for island division of a distribution network with distributed power sources. Background technique [0002] With the gradual maturity of distributed generation (Distributed Generation, DG) technology, the DG that uses various renewable energy as primary energy in the distribution network is increasing year by year. With the continuous improvement of DG penetration rate, the operation mode and management of distribution network are also more complicated. The current DG grid-connected regulations do not allow island operation, and require that DG must withdraw quickly when a fault or disturbance occurs, resulting in the limitation of DG's contribution to the distribution network. in clean power generation. However, the advantages of DG in terms of power generation flexibility have not been fully utilized. The island division scheme and...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06H02J3/38
CPCG06Q10/04G06Q10/06312G06Q50/06H02J3/38H02J3/388H02J2203/20Y02E40/70Y04S10/50
Inventor 张成龙刘军王效平祖连波王栋业张美玲张志村尉俊霞董波刘杨李秀伟李晓燕
Owner STATE GRID SHANDONG ELECTRIC POWER CO SHOUGUANG POWER SUPPLY CO
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