A method and system for load reduction in distribution network island operation mode
A technology of load reduction and operation mode, applied in circuit devices, AC network circuits, AC network voltage adjustment, etc., can solve the problems of inability to take into account the reliability and economy of power supply, and the load scheme is not very reasonable, and achieve a reasonable reliability assessment. , the effect of improving the reliability of power supply
Active Publication Date: 2019-07-09
CHINA AGRI UNIV
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[0003] At present, although the islanding strategy in the current reliability research fully considers the matching relationship between the load capacity and the generating capacity in the island, this strategy only starts from the perspective of power balance and fails to fully take into account the particularity of the distribution network structure. In addition, due to the lack of comprehensive consideration of the reliability of the system and the load side, the obtained load scheme is not very reasonable, and the reliability and economy of power supply cannot be considered
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[0066] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0067] Establishing a reasonable and effective method for dividing the range of isolated islands can realize the rapid recovery of power supply for non-faulty networks and important loads in power outage areas, which is conducive to reducing fault losses and improving power supply reliability of distribution networks. In the island mode, a reasona...
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The invention provides a load reduction method under a power distribution network island operation mode and a system. The method comprises steps that a power distribution network simplification model is established according to a present power distribution network structure; a weight coefficient of each load set of the power distribution network simplification model is acquired; a load reduction model is established according to the weight coefficient of each load set of the power distribution network simplification model; the load reduction model is solved, and an optimal load reduction scheme under the power distribution network island operation mode is acquired. The system comprises a power distribution network simplification model establishment module, a weight coefficient acquisition module, a load reduction model establishment module and a load reduction model solving module. According to the method, consideration about influence of multiple factors including DG, loads and the network structure can be realized, reliability evaluation of an active power distribution network can be made to be more reasonable, and effective tool means is provided for programming and establishment of the active power distribution network.
Description
technical field [0001] The invention relates to the field of power distribution system planning and control, in particular to a method and system for reducing loads in an island operation mode of a distribution network. Background technique [0002] With the development of the smart grid, various distributed generation (Distributed Generation, DG) are connected to the distribution network on a large scale, which has caused major changes in the operation mode of the distribution network, and then the reliability evaluation and failure of the distribution network Recovery is also getting more attention. When the distribution network including DG fails, under certain conditions, some areas can operate in an island mode, and the DG is independently powered to achieve power balance in this area. In the island operation mode, a reasonable load reduction strategy can effectively improve the power supply reliability of the distribution network with DG. The isolated island can give...
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IPC IPC(8): H02J3/14
CPCH02J3/14H02J2203/20
Inventor 杜松怀范婷婷蔡雅婷苏娟
Owner CHINA AGRI UNIV