Distribution network reconfiguration method and system
A technology for distribution network reconfiguration and network loss, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as deviation of reconfiguration results and limited reconfiguration factors, and achieve load balance, optimization of power supply paths, and accuracy of high effect
Active Publication Date: 2017-12-22
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY
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[0004] Embodiments of the present invention provide a distribution network reconfiguration method and system to solve the problem that the reconfiguration method in the prior art considers limited reconfiguration factors, resulting in a certain deviation in the reconfiguration result
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[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. 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.
[0018] The embodiment of the invention discloses a distribution network reconfiguration method. Such as figure 1 As shown, the method includes the following steps:
[0019] Step S10: Establish an interval model of load and distributed energy.
[0020] Step S20: Establishing first objective optimization functions of active network loss cost, expected power shortage and switch operation cost respectively.
[0021] Step S30: Determine the constraints o...
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The invention discloses a distribution network reconfiguration method and system. The method comprises the steps that a load and distributed energy interval model is established; the first target optimization functions of active power transmission loss cost, expected lack power supply and switching operation cost are established respectively; the constraints of the first target optimization functions are determined; according to the load and distributed energy interval model, the constraints and the weight of each first target optimization function, the first target optimization functions are normalized to acquire second target optimization functions; the on / off initial value of the switch of a node of a distribution network is set; a harmony search algorithm is used to solve the second target optimization functions; and according to the on / off initial value of the switch of the node, which is corresponding to the solution of the minimum second target optimization function, of the distribution network, the distribution network is reconfigured. According to the invention, uncertainty caused by stochastic fluctuation of a load and distributed energy is comprehensively considered, which is highly consistent with the actual situation, and is highly accurate.
Description
technical field [0001] The invention relates to the technical field of distribution network planning, in particular to a distribution network reconfiguration method and system. Background technique [0002] Distribution network reconfiguration is a process of switching and adjusting the on-off status of tie switches and section switches in the network. Through network reconstruction, the new topology network can reduce network loss and improve operational reliability. During the reconstruction process, timing influence and environmental factors will inevitably lead to data uncertainty. These uncertainties are usually manifested as load fluctuations, fluctuations in equipment maintenance parameters, and so on. Taking load uncertainty as an example, in load forecasting, it is often necessary to use an uncertain value range to describe the load in a certain period of time in the future. Such a value is more in line with objective needs. The prediction results obtained by us...
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Login to View More IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 李四勤张爽罗海荣蒙金有焦龙叶学顺
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY