A Reliability Assessment Method for Medium-Voltage Distribution Network Based on Hierarchical Regional Power Flow Channels
A reliability and distribution network technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of low accuracy and time-consuming, and achieve the effect of simple calculation and high evaluation accuracy
Active Publication Date: 2016-06-29
YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST +1
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The feature of this method is that it is very flexible, not limited by the scale of the system, and can give the probability distribution of the reliability index, but it is time-consuming and the accuracy is not high
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[0019] The present invention is a method for evaluating the reliability of a medium-voltage distribution network based on hierarchical regional power flow channels, and its specific implementation method is as follows:
[0020] 1) Through the synchronous interface, collect relevant data in the distribution network GIS system, and initialize the network information of the medium voltage distribution network: substation information, line information, switch information, load information;
[0021] 2) Through the power supply reliability information management platform (a national unified power supply reliability information system), use the historical data of the last 3 years to initialize wires (bare wires, insulated wires, cables, etc.), distribution transformers, circuit breakers, and disconnectors , fuses and other basic component unit basic information, mainly including the average failure rate, the average failure repair time, and the operating life of basic components;
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A method for evaluating the reliability of a medium-voltage distribution network based on hierarchical regional power flow channels. The present invention first reflects the power supply characteristics and transfer power characteristics of the distribution network with circuit breakers, isolating switches, and tie switches, etc. The components of the characteristics are divided into the first layer of area to form the parent sub-area of the distribution network. For each parent sub-area, according to the power supply path of its power supply, the circuit breaker, tie switch, and tie switch of the path are used as nodes. Form its power flow channel table, so as to determine the failure consequence type of each parent sub-area. For each sub-area, the fuse is used as the dividing point to form the second-level sub-area of each parent-level sub-area. According to the connection relationship of the second-level sub-area and the power flow channel table of the parent-level sub-area, the reliability index of the parent-level sub-area and its load point is evaluated, and the power supply reliability indicators of all parent-level sub-areas are integrated to form the power supply of the distribution network Reliability index to realize the power supply reliability evaluation of distribution network.
Description
technical field [0001] The invention belongs to the category of power supply reliability evaluation of a medium-voltage distribution network. Background technique [0002] With the development of the national economy, the scale of the distribution network is getting larger and its structure is becoming more and more complex, and the requirements of power users for the reliability of power supply are also getting higher and higher. For power supply enterprises, finding the weak links in the distribution network and maximizing the reliability of power supply in the distribution network with limited funds are major problems they face. At the same time, in the daily operation and management of the distribution network, by evaluating the reliability level of the distribution network, the overhaul and technical transformation of the distribution network can be effectively formulated, and the improvement of the reliability management level of power supply can be promoted, which has...
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IPC IPC(8): G06F19/00
Inventor 黄绪勇陈娟孙鹏杨清张建刘宗兵王芬
Owner YUN NAN ELECTRIC TEST & RES INST GRP CO LTD ELECTRIC INST