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Newton-Raphson and forward pushing coordinated flow algorithm for transmission and distribution network comprising distributed power supply

A distributed power supply, power transmission and distribution technology, applied in the direction of computing, electrical components, circuit devices, etc., can solve problems such as the large number of nodes, the inability to use algorithms, and the complexity of coordinating the global power flow problem, so as to reduce the difficulty of solving and solve the results Inexact problem, effect of exact solution

Inactive Publication Date: 2016-04-06
STATE GRID CORP OF CHINA +4
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Problems solved by technology

[0003] In the power system, the transmission network and the distribution network are two subsystems with different functional characteristics, and a unified algorithm cannot be adopted; in addition, due to the large number of equipment and nodes in the distribution network, the global power flow problem to be solved by coordinating power flow becomes more complicated. complex

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  • Newton-Raphson and forward pushing coordinated flow algorithm for transmission and distribution network comprising distributed power supply
  • Newton-Raphson and forward pushing coordinated flow algorithm for transmission and distribution network comprising distributed power supply
  • Newton-Raphson and forward pushing coordinated flow algorithm for transmission and distribution network comprising distributed power supply

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Embodiment Construction

[0018] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0019] The cow-pull-forward coordinated power flow calculation method of the transmission and distribution network containing distributed power sources of the present invention is to integrate the Newton-Raphson method and the forward-push back generation method into the coordinated power flow calculation. The present invention mainly aims at the characteristics that the transmission network system and the distribution network system in the power system are independent of each other and cannot adopt a unified algorithm. In addition, in order to adapt to the large number of distribution network equipment and the large number of nodes, the global power flow problem to be solved by coordinating the power flow becomes variable. For more complex situati...

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Abstract

The present invention discloses a Newton-Raphson and forward pushing coordinated flow algorithm for a transmission and distribution network comprising a distributed power supply. The algorithm comprises the following steps of: (1) inputting an original parameter of the transmission and distribution network; (2) initializing an amplitude and a phase angle of each node voltage; (3) setting the number of iterations of flow calculation as 1; (4) calculating a distribution network flow by using a forward pushing back substitution algorithm to obtain an impregnation power of an edge node of a distribution network; (5) calculating a transmission network flow by using a Newton-Raphson algorithm to obtain each node voltage of a transmission network; (6) determining whether a voltage difference of the edge node in each two adjacent iterations is smaller than a set convergence value, if the voltage difference is smaller than the set convergence value, then coordinating flow iteration convergence, and turning to the step (7), or turning to the step (4) to continue iteration and setting k=k+1; (7) outputting a calculating result. According to the Newton-Raphson and forward pushing coordinated flow algorithm for the transmission and distribution network comprising the distributed power supply, the Newton-Raphson algorithm and forward pushing back substitution algorithm are integrated into the coordinated flow computation, a coordinated flow solution of the transmission and distribution network comprising the distributed power supply can be accurately solved.

Description

technical field [0001] The invention relates to a cow-pull-forward coordinated power flow algorithm for a transmission and distribution network including distributed power sources, and belongs to the technical field of electric power flow calculation. Background technique [0002] The traditional power flow calculation separates the transmission network and the distribution network, and the transmission and distribution power flows are performed independently. In fact, the power system is a unified whole, and the transmission network and distribution network are interconnected and affect each other through the power network. The access of distributed power sources has changed the operating structure of the traditional distribution network with one-side power supply, and the distribution network is gradually transforming into an active network with multiple distributed power sources. In areas where distributed power is centrally connected, the distribution network will even ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06Q50/06
CPCG06Q50/06H02J3/00H02J2203/20
Inventor 苏义荣王双虎席旸旸尹宏旭谢琳许晓慧柳劲松陈然方陈邱腾飞梁硕夏俊荣胡汝伟张祥文曹潇姚虹春杭晗周昶
Owner STATE GRID CORP OF CHINA
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