Distributed Optimal Power Flow Calculation Method and Device for Radial DC Distribution Network
A technology for DC distribution network and optimal power flow, applied in the direction of DC network circuit devices, circuit devices, computing, etc., can solve the problem of difficult to effectively protect the privacy of DG main body information, optimize the paralysis of the scheduling system, the computing performance of the central control unit, and the storage space. Big demand, etc.
Active Publication Date: 2019-01-15
TSINGHUA UNIV
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Problems solved by technology
[0006] (2) The computing performance and storage space requirements of the central control unit are large
[0007] (3) High dependence on the central control unit
Once the calculation or communication of the central control unit fails, the entire optimization dispatching system will be paralyzed
[0008] (4) Information privacy protection issues
In the case that DG and distribution network belong to different stakeholders, it will be difficult to effectively protect the information privacy of DG subjects by the centralized optimization mode of obtaining all information of controllable subjects
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[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0036] Before describing the method and device for calculating the distributed optimal power flow of the radial DC distribution network according to the embodiments of the present invention, the terms used in the text will be briefly explained below.
[0037] For a radial DC distribution network whose topology is a dendrogram, let N={1,2,…,n} represent a collection of nodes, and let the root node number be 1, N + =N\{1} represents the set of all nodes except the root node. E represents the set of lines, and the direction of the ...
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The invention discloses a distributed type optimal power flow calculation method and apparatus for a radial pattern direct current power distribution network. The distributed type optimal power flow calculation method comprises the following steps of determining an objective function and a constraint condition; determining local variable according to the objective function and the constraint condition; performing distributed iterative computation according to the local variable; determining whether an iteration stopping condition is satisfied or not; and if so, performing adaptive adjustment on step length, and then solving an optimization problem in the distributed iterative computation to obtain optimal capacity configuration of compressed air energy storage. By adoption of the embodiment of the distributed type optimal power flow calculation method, global coordination or layering and partitioning is not required; a calculation unit is arranged in each controllable main body; and global optimization is completed through partial communication and parallel computation so as to overcome shortcomings of a concentrated optimization method.
Description
technical field [0001] The invention relates to the technical field of distributed power generation and power electronics, in particular to a distributed optimal power flow calculation method and device for a radial DC distribution network. Background technique [0002] With the development of DG (Distributed Generation) technology and power electronics technology, the DC distribution network has certain economic and technical advantages in many aspects. DG represented by photovoltaics and fuel cells can save the DC-AC link when connecting to the DC distribution network, effectively reducing costs and losses; in addition, the DC distribution network also has large transmission capacity, low line cost, and power distribution With many advantages such as low loss and high power supply reliability, it has gradually become a hot research field. Among them, the Optimal Power Flow (OPF) problem of DC distribution network has received extensive attention because of its significanc...
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IPC IPC(8): H02J1/00G06Q50/06
CPCG16Z99/00H02J1/00
Inventor 陈来军梅生伟郑天文王召健韩禹歆
Owner TSINGHUA UNIV