Direct-current power distribution and utilization system reliability evaluation method based on network equivalence

A power distribution and reliability technology, applied in information technology support systems, electrical digital data processing, special data processing applications, etc., can solve problems such as reducing the accuracy of evaluation results

Active Publication Date: 2019-11-12
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the proportion of DC loads increases year by year, according to the traditional AC distribution network, only by changing the load capacity and equipment failure rate to evaluate the reliability of the multi-load distribution system may reduce the accuracy of the evaluation results

Method used

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  • Direct-current power distribution and utilization system reliability evaluation method based on network equivalence
  • Direct-current power distribution and utilization system reliability evaluation method based on network equivalence
  • Direct-current power distribution and utilization system reliability evaluation method based on network equivalence

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Embodiment Construction

[0079] The present invention will be further described below in conjunction with specific examples.

[0080] A method for evaluating the reliability of DC power distribution systems based on network equivalents, such as figure 1 shown, including the following steps:

[0081] Step 1: Obtain the original parameters and topology of the DC power distribution system, the load parameters of the power distribution system, the failure rate and repair time of key equipment;

[0082] Step 2: Applying the upward equivalence and downward equivalence of the DC power distribution system to decompose the system into N simple radial networks, and the circuit breaker and transformer are equivalent to components S i (i=1, 2, 3...n); the main line between the branch feeders and the section switch are equivalent to the element M i ; The fuses, transformers, converters and feeder lines of branch feeders are equivalent to components L i ;

[0083] Upward equivalence The system is equivalent to...

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Abstract

The invention discloses a direct-current power distribution and utilization system reliability evaluation method based on network equivalence, and relates to the field of direct-current power distribution systems. According to the method, the problem of repeated enumeration process of the fault state in the fault mode consequence analysis method is solved. Aiming at original parameters and a topological structure of a direct-current power distribution and utilization system, load parameters of the power distribution and utilization system, a fault rate of key equipment and fault repair time, upward equivalence and downward equivalence of the direct-current power distribution and utilization system are respectively applied to decompose the system into N simple radiative networks; and determining an equivalent scheme according to the to-be-evaluated load node, and evaluating the reliability index of the power distribution system according to the load point reliability index. The method avoids the repeated and tedious enumeration process of the fault state of the power distribution system, improves the reliability evaluation efficiency, and guarantees the accuracy of the reliability evaluation result to the maximum degree. The method is suitable for a direct-current power distribution system and has good accuracy and high efficiency.

Description

technical field [0001] The invention relates to the field of DC power distribution systems, in particular to a method for evaluating the reliability of a DC power distribution system based on network equivalents. Background technique [0002] With the rapid development of distributed power supply, DC load access to distribution network and power electronics technology, compared with AC distribution network, DC power distribution system has advantages in terms of technology and economy. However, in terms of large-scale application of DC power distribution systems, the power supply scheme for DC loads should be determined according to the reliability of different forms of power distribution systems. [0003] Traditional power distribution system reliability assessment only takes into account the DC load capacity. Due to the relatively small DC load, a limited number of power converters are usually attributed to the load side, ignoring the impact of high failure rate power conv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCY04S10/50
Inventor 常潇王浩李胜文王金浩亢银柱张世锋卫红旺李慧蓬张敏樊瑞梁定康
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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