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A reliability assessment method for DC power distribution system based on network equivalence

A power distribution and reliability technology, applied in information technology support systems, design optimization/simulation, etc., can solve problems such as reducing the accuracy of evaluation results, improve reliability evaluation efficiency, avoid repetition of fault states, and ensure accuracy Effect

Active Publication Date: 2022-08-09
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER +2
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  • Description
  • Claims
  • Application Information

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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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  • A reliability assessment method for DC power distribution system based on network equivalence
  • A reliability assessment method for DC power distribution system based on network equivalence
  • A reliability assessment method for DC power distribution system based on network equivalence

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Embodiment Construction

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

[0080] A reliability assessment method of DC power distribution system based on network equivalence, such as figure 1 shown, including the following steps:

[0081] The first step: obtain the original parameters and topology of the DC power distribution system, as well as the load parameters of the power distribution system, the failure rate and fault repair time of key equipment;

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

[0083] U...

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Abstract

The present invention disclosed a reliability evaluation method based on the equivalent of the network equivalent, involving the field of DC power distribution system.The present invention solves the problem of duplicate processes in the consequences of the fault mode consequences.The present invention is based on the original parameters and topology structure of the DC electricity system, as well as the load parameters of the power system, and the failure rate and fault repair time of the key equipment, and the upstream equivalent of the DC power system and the downward equivalent system will be used.For n simple radiation networks; according to the load node to be evaluated, determine the equivalent scheme, and evaluate the reliability indicator of the power distribution system according to the load point reliability indicator.This method avoids the duplicate and tedious lift process of the faulty state of the power distribution system. While improving the efficiency of reliability assessment, it will maximize the accuracy of the reliability assessment results.The present invention is suitable for DC power distribution systems and has good accuracy and 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 generation, DC load access to the distribution network, and power electronics technology, compared with the AC distribution network, the DC power distribution system has technical and economic advantages. However, as far as the large-scale application of DC power distribution systems is concerned, the power supply scheme for DC loads should be determined according to the reliability of different forms of power distribution systems. [0003] The traditional power distribution system reliability assessment only takes into account the DC load capacity. Since the DC load is relatively small, the limited number of power converters are usually attributed to the load side, and the impact of high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
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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