Weak link identification method for power distribution network

A weak link and identification method technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve the problem of not being able to analyze the distribution network in an all-round way, and achieve the effect of shortening maintenance time, improving satisfaction, and ensuring accuracy

Active Publication Date: 2017-12-08
HUANAN IND TECH RES INST OF ZHEJIANG UNIV
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Problems solved by technology

The identification of weak links in the distribution network of the existing power system mainly relies on experience to predict faults, which is closely related to the subjectivity and experience of engineers to a certain extent, and relying on subjective experience to judge cannot comprehensively analyze the distribution network various weak points

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  • Weak link identification method for power distribution network

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Embodiment Construction

[0050] The principles and specific implementation methods of the present invention will be described below in conjunction with the accompanying drawings.

[0051] Such as figure 1 As shown, a method for identifying weak links in a distribution network, the specific process includes: Step 1. Establish a topology model of a distribution network.

[0052] According to the actual connection relationship diagram of the distribution network, the topology diagram of the distribution network is formed, and the capacity matrix of the main transformer, the connection relationship matrix of the tie line, and the capacity matrix of the tie line are generated.

[0053] Step 2. Use the existing information of the distribution network to calculate the power supply capacity of the distribution network, and compare it with the actual operating conditions to check for weak links.

[0054] For the distribution network area containing multiple interconnected substations, the objective function o...

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Abstract

The invention discloses a weak link identification method for a power distribution network. The method comprises the following steps of (1) building a topology model of the power distribution network, forming a topology diagram of the power distribution network according to an actual connection diagram of the power distribution network and generating a main transformer capacity matrix, a tie line connection relationship matrix and a tie line capacity matrix; (2) calculating the power supply capacity of the power distribution network by using existing information of the power distribution network, comparing with the actual operation condition and troubleshooting weak links; and (3) traversing a topology of the power distribution network and troubleshooting all weak links; and (4) comprehensively judging all possible weak links to form a weak link set. The weak links of a transformer and a tie line of the power distribution network are accurately judged by virtue of the transformer capacity, the tie line transmission capacity limitation and the network structure topology connection relationship of the power distribution network, occurrence and consequence of a fault are accurately pre-judged, and identification of the weak links of the power distribution network and shortening of the maintenance time of the power distribution network and the customer interrupt time are facilitated.

Description

technical field [0001] The invention relates to distribution automation and distribution network power supply capacity evaluation, belongs to the field of smart grids, and specifically relates to a method for identifying weak links of a distribution network. technical background [0002] With the continuous development of social economy, the scale of my country's power grid continues to expand, and electric power plays a vital role in the development of social production. Power failure will have a serious impact on social economy and even political and cultural development. The identification of weak links in the distribution network of the existing power system mainly relies on experience to predict faults, which is closely related to the subjectivity and experience of engineers to a certain extent, and relying on subjective experience to judge cannot comprehensively analyze the distribution network all weak points. Therefore, an objective, accurate and transplantable wea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 郭创新张少军
Owner HUANAN IND TECH RES INST OF ZHEJIANG UNIV
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