CN-122026691-A - Method, system, equipment and medium for selecting converter of offshore wind power transmission system

CN122026691ACN 122026691 ACN122026691 ACN 122026691ACN-122026691-A

Abstract

The invention discloses a method, a system, equipment and a medium for selecting a converter of an offshore wind power transmission system, which belong to the technical field of offshore wind power transmission, define application scenes according to transmission distance, capacity requirements and engineering economy indexes, select candidate converters, calculate the comprehensive score of each candidate converter based on a multi-dimensional quantitative evaluation system, dynamically adjust each dimensional weight coefficient of the multi-dimensional quantitative evaluation system in combination with the application scenes, sort the comprehensive scores to obtain sorting results, and determine the combination strategies of a main selected converter, an alternative converter and a converter in different scenes according to the sorting results and in combination with the application scenes. The blindness of the type selection of the converter is reduced, the equipment investment waste and the operation risk are reduced, and the method is particularly suitable for complex power transmission scenes such as offshore wind power and the like.

Inventors

LI ZHENG
AI JINSHENG
WANG CHUNLIN
CHEN FENG
DU WEIAN
GUO XIAOJIANG
HE WEIGUO
ZHANG JUNYANG
BO QIANG
ZHANG ZHUOYU
RAO GUOPING

Assignees

中国华能集团清洁能源技术研究院有限公司
华能(浙江)能源开发有限公司玉环分公司
华能(浙江)能源开发有限公司

Dates

Publication Date: 20260512
Application Date: 20260123

Claims (10)

1. The type selecting method of the converter of the offshore wind power transmission system is characterized by comprising the following steps of: defining an application scene according to the transmission distance, the capacity requirement and the engineering economy index; Selecting a candidate converter; Calculating the comprehensive score of each candidate converter based on a multi-dimension quantitative evaluation system, wherein each dimension weight coefficient of the multi-dimension quantitative evaluation system is dynamically adjusted in combination with an application scene; Sequencing the comprehensive scores to obtain a sequencing result; and determining the main selection converter, the alternative converter and the converter combination strategy in different scenes according to the sorting result and in combination with the application scene.
2. The method for selecting the type of the converter of the offshore wind power transmission system according to claim 1, wherein the application scene comprises an offshore wind farm scene with a transmission distance of less than or equal to 50km and a capacity of 200-500MW, a middle and far offshore wind farm scene with a transmission distance of 50-150km and a capacity of 500-1000MW, and a deep and far offshore wind farm scene with a transmission distance of >150km and a capacity of more than or equal to 1000 MW.
3. The offshore wind power transmission system converter selection method of claim 1, wherein the candidate converters include HVAC converters, HVDC converters, M3C, hexverter and MMC back-to-back converters.
4. The offshore wind power transmission system converter selection method of claim 1, wherein the dimensions of the multi-dimensional quantitative evaluation system include a technical performance dimension, an economic dimension, an engineering applicability dimension, and an environmental operation dimension.
5. The offshore wind power transmission system converter selection method of claim 1, wherein the technical performance dimension includes transmission capacity suitability, transmission distance suitability, control flexibility, current or voltage stress margin; the economical dimension comprises initial investment, life cycle cost and equipment reusability; the engineering applicability dimension comprises technical maturity, manufacturing or installation difficulty and system compatibility; the environmental operation dimension includes maintenance frequency, time to repair failure, floor space, or noise.
6. A method of converter selection for an offshore wind power transmission system according to claim 1, wherein said calculating a composite score for each candidate converter comprises the steps of: And taking the dimension of the multi-dimension quantitative evaluation system as a calculation item, taking the dynamically adjusted weight as a coefficient, multiplying and summing the score of each dimension with the corresponding weight, and obtaining the comprehensive score of the candidate converter.
7. The method for selecting the type of the converter of the offshore wind power transmission system according to claim 1, wherein the main selection converter, the alternative converter and the converter combination strategy in different scenes comprises: HVAC inverter in combination with distributed Hexverter; the M3C main converter is combined with the MMC back-to-back standby converter; HVDC converters are combined with M3C-assisted regulation.
8. The type selection system of the converter of the offshore wind power transmission system is characterized by comprising: the scene defining module is used for defining an application scene according to the transmission distance, the capacity requirement and the engineering economy index; the candidate converter selecting module is used for selecting a candidate converter; the comprehensive score calculating module is used for calculating the comprehensive score of each candidate converter based on a multi-dimension quantitative evaluation system, and each dimension weight coefficient of the multi-dimension quantitative evaluation system is dynamically adjusted in combination with an application scene; The score ordering module is used for ordering the comprehensive scores to obtain an ordering result; and the converter determining module is used for determining the main converter, the alternative converter and the converter combination strategy under different scenes according to the sorting result and in combination with the application scene.
9. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the offshore wind power transmission system converter selection method of any one of claims 1-7 when the computer program is executed.
10. A computer readable storage medium storing a computer program which when executed by a processor implements the method of converter selection of an offshore wind power transmission system according to any of claims 1-7.

Description

Method, system, equipment and medium for selecting converter of offshore wind power transmission system Technical Field The invention belongs to the technical field of offshore wind power transmission, and particularly relates to a method, a system, equipment and a medium for selecting an inverter of an offshore wind power transmission system. Background With the development of offshore wind power to the deep sea and high capacity, the power transmission system has strict requirements on the performance, economy and reliability of the converter. The current mainstream converter types comprise a modularized multi-level matrix converter (M3C), a hexagonal modularized converter (Hexverter), an MMC back-to-back converter and the like, and different converters have obvious differences in the aspects of topological structures, technical performances, cost investment, application scenes and the like. In the prior art, the converter selection is dependent on single dimension judgment (such as considering only the transmission distance or the initial investment cost), and a multi-dimension comprehensive evaluation system of the system is lacked: the economic level is that the full life cycle cost such as initial equipment cost, operation and maintenance cost, failure and shutdown loss and the like are not fully integrated; The technical layer is that quantitative evaluation covering key indexes such as conveying capacity, voltage and current stress, power control precision, capacitance and voltage fluctuation is not formed; an adaptation layer is used for not carrying out dynamic weight adjustment aiming at scenes of different transmission distances, power levels and frequency demands; and the reliability level is that the fault isolation difficulty, the redundant design of devices and the service life loss are ignored, and long-term operation key factors are avoided. The single-dimension mode of selecting the type causes that the selected converter is difficult to meet the comprehensive requirements of economy, technical performance and reliability at the same time, for example, M3C with higher cost is selected blindly in a short-distance scene, or Hexverter with insufficient conveying capacity is selected in a medium-distance scene, so that resource waste or system operation risk is caused. Therefore, a comprehensive scoring evaluation method for multi-dimensional, scenerized and quantifiable converters is needed to realize optimal selection or combination configuration of converter types. Disclosure of Invention The invention aims to solve the problem that the existing converter selection lacks a system comprehensive evaluation system, and provides a method, a system, equipment and a medium for selecting the converter of an offshore wind power transmission system. In order to achieve the above purpose, the invention adopts the following technical scheme: In a first aspect, the invention provides a method for selecting the type of an inverter of an offshore wind power transmission system, which comprises the following steps: defining an application scene according to the transmission distance, the capacity requirement and the engineering economy index; Selecting a candidate converter; based on a multi-dimension quantitative evaluation system, calculating the comprehensive score of each candidate converter, and dynamically adjusting each dimension weight coefficient of the multi-dimension quantitative evaluation system in combination with an application scene; Sequencing the comprehensive scores to obtain a sequencing result; and determining the main selection converter, the alternative converter and the converter combination strategy in different scenes according to the sorting result and in combination with the application scene. Further, the application scene comprises an offshore wind farm scene with a power transmission distance of less than or equal to 50km and a capacity of 200-500MW, a middle and far sea wind farm scene with a power transmission distance of 50-150km and a capacity of 500-1000MW, and a deep and far sea wind farm scene with a power transmission distance of >150km and a capacity of more than or equal to 1000 MW. Further, the candidate converters include HVAC converters, HVDC converters, M3C, hexverter, and MMC back-to-back converters. Further, the dimensions of the multidimensional quantitative evaluation system include a technical performance dimension, an economical dimension, an engineering applicability dimension and an environmental operation dimension. Further, the technical performance dimensions include transmission capacity suitability, transmission distance suitability, control flexibility, current or voltage stress margin; the economy dimension comprises initial investment, life cycle cost and equipment reusability; engineering applicability dimensions include technology maturity, manufacturing or installation difficulty, system compatibility; the environmental operational dimension