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A Method of Obtaining the Reliability of VSC-Based Multi-terminal DC System

A multi-terminal DC, reliable technology, applied in special data processing applications, measuring devices, instruments, etc., can solve problems such as errors, and achieve the effect of high accuracy and simple operation

Active Publication Date: 2018-01-19
XI AN JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But these simplifications and approximations are bound to introduce errors

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  • A Method of Obtaining the Reliability of VSC-Based Multi-terminal DC System
  • A Method of Obtaining the Reliability of VSC-Based Multi-terminal DC System
  • A Method of Obtaining the Reliability of VSC-Based Multi-terminal DC System

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Embodiment 1

[0043] This embodiment will specifically illustrate the process of obtaining the path equivalent model. Elements 1-3 are AC systems, 4-6 are converter transformers, 7-9 are converter modules, and 10-18 are DC cables or neutral wires , 21-38 are DC circuit breakers, 19, 20, 39 are AC circuit breakers, the lines composed of 21, 10 and 22, the lines composed of 27, 13 and 28 are positive lines, the lines composed of 25, 12 and 26 and The line composed of 31, 15 and 32 is the negative line, the line composed of 23, 11 and 24, and the line composed of 29, 14 and 30 is the neutral line. neutral cable to model.

[0044] Firstly, the initial model used to describe the topological connection relationship of each component of the original system is obtained. Then the adjacency list is used to represent the connection relationship of each component, and the adjacency list A is obtained, and the adjacency list A is used to obtain the protection area of ​​each component. The adjacency lis...

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Abstract

The invention discloses a method for obtaining the reliability of a VSC-based multi-terminal direct current system, which comprises the following steps: first, performing topology identification on the multi-terminal direct current system, and using equivalent direct current line components to establish an equivalent model for the system, and identifying in the equivalent model Find the minimum path set of the system, enumerate the fault conditions of triple and below components, analyze the fault state of each system, calculate the incremental frequency and probability of the fault state, and calculate the maximum flow parameters of the DC line components Correction, the output power of the system in this state is calculated by the net flow method, and the outage table of the system is obtained. In the process of fault state analysis, different wiring forms, operation modes of the system and different decisions taken by the DC line to deal with faults are taken into account. The invention can accurately obtain the reliability of the multi-terminal direct current system, and has strong versatility.

Description

technical field [0001] The invention belongs to the field of power system reliability analysis, and relates to a method for obtaining the reliability of a multi-terminal DC system, in particular to a method for obtaining the reliability of a VSC-based multi-terminal DC system. Background technique [0002] In recent years, the actual projects of HVDC transmission have been increasing. This technology is currently mainly used for long-distance high-power transmission, large-scale networking, and underground or submarine cable power transmission. The improvement of its reliability will also bring huge benefits to the safe, reliable and economical operation of the entire power system. Therefore, it is a very important task to quantitatively evaluate the reliability of HVDC transmission system, analyze various influencing factors, and propose corresponding countermeasures. [0003] With the rapid development of the economy, the traditional AC transmission and point-to-point hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00G01R31/00
Inventor 王锡凡王碧阳宁联辉陈鹏
Owner XI AN JIAOTONG UNIV