CN-121998476-A - Capacity configuration evaluation method for offshore wind power direct current collection system

CN121998476ACN 121998476 ACN121998476 ACN 121998476ACN-121998476-A

Abstract

The application provides a capacity configuration evaluation method, device and equipment for an offshore wind power direct current collection system, and belongs to the field of power system planning. The embodiment of the application evaluates the planning scheme of the offshore wind power direct current collection system from multiple dimensions of efficiency, economy and reliability, solves the defect that the related technology focuses on only a single index, establishes a standardized evaluation flow, converts each evaluation index into quantifiable scores according to a preset relation between each evaluation index and the score, adopts an analytic hierarchy process to determine the weight corresponding to each evaluation index, obtains the comprehensive score of the planning scheme through weighted summation, finally screens out a target planning scheme from multiple planning schemes according to the comprehensive score, avoids the interference of artificial subjective factors on the evaluation result, ensures that the comparison of the multiple planning schemes has a unified standard, and has more credibility, repeatability and comparability, and provides scientific basis for engineering decision.

Inventors

LIU PENGCHENG
WU BINGYANG
WANG QINGJIAN
ZHU HE
LIU JING
WANG XIAN
YIN CHUANG
LI ZHANG
LI YAJING
LUO HAN
HAO WEIHAN
LI ZEMIN
GUO WANG
WANG YUEBIN
HUANG YANG
QU LU
CHEN YUE

Assignees

广东阳江市创源海上风电综合投资有限公司
三峡新能源阳江发电有限公司
中国长江三峡集团有限公司
中国三峡新能源(集团)股份有限公司
长江三峡投资管理有限公司
中国能源建设集团广东省电力设计研究院有限公司
清华大学

Dates

Publication Date: 20260508
Application Date: 20251219

Claims (12)

1. The capacity configuration evaluation method of the offshore wind power direct current collection system is characterized by comprising the following steps of: obtaining target parameters corresponding to each of a plurality of offshore wind power direct current collection system planning schemes, wherein the target parameters comprise rated capacity, topological structure, equipment parameters, fault parameters and cost parameters of the offshore wind power direct current collection system; For each offshore wind power direct current collection system planning scheme, determining an evaluation index of the offshore wind power direct current collection system planning scheme according to the target parameters, wherein the evaluation index comprises an efficiency evaluation index, an economical efficiency evaluation index and a reliability evaluation index; Determining a first score corresponding to the efficiency evaluation index, a second score corresponding to the economical evaluation index and a third score corresponding to the reliability evaluation index according to each evaluation index and the preset relation between each evaluation index and the score; Adopting an analytic hierarchy process to determine a first weight corresponding to the efficiency evaluation index, a second weight corresponding to the economical efficiency evaluation index and a third weight corresponding to the reliability evaluation index; According to the first weight, the second weight and the third weight, the first score, the second score and the third score are weighted and summed to obtain a comprehensive score of the offshore wind power direct current collection system planning scheme; And screening a target offshore wind power direct current collection system planning scheme from the plurality of offshore wind power direct current collection system planning schemes according to the comprehensive scores of the offshore wind power direct current collection system planning schemes.
2. The method according to claim 1, wherein the efficiency evaluation index comprises a total power loss rate, the equipment parameters comprise cable parameters and fan parameters, and the determining the efficiency evaluation index of the offshore wind power direct current collection system planning scheme according to the target parameters comprises: according to the topological structure, determining the number of target cables, the number of fans collected on each target cable and the distance between fans; Determining networking power loss according to the number of the target cables, the cable parameters, the number of fans collected on each target cable and the distance between fans; Determining fan power loss according to the number of fans and fan parameters collected on each target cable; Obtaining total power loss according to the networking power loss and the fan power loss; and determining the total power loss rate according to the total power loss and the rated capacity.
3. The method of claim 2, wherein the cable parameters include a number of cables and a cable resistivity, the fan parameters include a fan output current value, and accordingly, determining a networking power loss based on the number of target cables, the cable parameters, the number of fans collected on each target cable, and a fan spacing comprises: determining a current value and a resistance value flowing through each target cable according to the number of fans, the fan spacing, the fan output current value and the cable resistivity collected on each target cable; determining the power loss of the target cable according to the current value and the resistance value of the target cable; and summing the power loss of each target cable according to the number of the target cables to obtain the networking power loss.
4. A method according to claim 3, wherein the topology comprises a chain topology, and wherein the determining the current value and the resistance value flowing through the target cable based on the number of fans, the fan spacing, the output current value, and the cable resistivity collected on each target cable, respectively, comprises: Determining the number of segments of the target cable and the current value on each segment according to the number of fans collected on each target cable and the output current value of the fans; Determining the resistance value of each segment according to the fan spacing and the cable resistivity; Determining the power loss of the target cable according to the current value and the resistance value of the target cable comprises the following steps: and determining the power loss of the target cable by the number of the segments of the target cable, the current value and the resistance value on each segment.
5. The method of claim 4, wherein the step of determining the position of the first electrode is performed, the method for determining the power loss of the target cable comprises the steps of: The power loss of the target cable is calculated using the following formula: , Wherein, the Representing the power loss of the target cable, Represent the first The resistance value of the segment is determined, Indicating the flow through The value of the current in the segment, Representing the number of segments of the target cable.
6. The method according to any one of claims 1 to 5, wherein the reliability evaluation index includes a utilization rate, the device parameters further include a device type and a device number of each type of device, the fault parameters include an annual average fault rate and an average repair time of each type of device, and accordingly, determining the reliability evaluation index of the offshore wind power direct current collection system planning scheme according to the target parameters includes: The annual average failure rate, the average repair time and the equipment number of each type of equipment are multiplied by adopting a minimum cut-set method, so that the annual power-off time of the corresponding type of equipment is obtained; Accumulating and summing the annual power-off time of various devices to obtain the annual total power-off time of the offshore wind power direct current collection system; and determining the utilization rate according to the total annual power loss time and the total annual working time of the offshore wind power direct current collection system.
7. The method of claim 6, wherein the determining the utilization rate based on the total annual power loss time and the total annual operating time of the offshore wind farm dc collection system comprises: The utilization rate is calculated using the following formula: , Wherein, the The use ratio is indicated as a function of the utilization ratio, Represent the first The number of devices of the class of devices, Represent the first Annual average power loss time of individual devices in the class of devices, Represent the first The annual power loss time of the class device, Representing the annual total power loss time of the offshore wind power direct current collection system, Indicating the total number of devices of the type, Indicating the annual total operating time of a single device, And representing the total annual operating time of the offshore wind power direct current collection system.
8. The method of claim 1, wherein determining, by using a hierarchical analysis method, a first weight corresponding to the efficiency evaluation index, a second weight corresponding to the economic evaluation index, and a third weight corresponding to the reliability evaluation index includes: Obtaining scale values of the efficiency evaluation index, the economical evaluation index and the reliability evaluation index, wherein the scale values are determined according to the relative importance of the efficiency evaluation index, the economical evaluation index and the reliability evaluation index; establishing a judgment matrix according to the scale value; Calculating a preliminary weight vector by adopting a geometric mean method according to the judgment matrix, wherein the preliminary weight vector comprises a first preliminary weight, a second preliminary weight and a third preliminary weight; And determining the first preliminary weight as the first weight, the second preliminary weight as the second weight and the third preliminary weight as the third weight in the case that the judgment matrix passes the consistency test.
9. An offshore wind power direct current collection system capacity configuration evaluation device, comprising: The system comprises an acquisition module, a calculation module and a calculation module, wherein the acquisition module is used for acquiring target parameters corresponding to a planning scheme of a plurality of offshore wind power direct current collection systems, and the target parameters comprise rated capacity, topological structure, equipment parameters, fault parameters and cost parameters of the offshore wind power direct current collection systems; The first determining module is used for determining an evaluation index of each offshore wind power direct current collection system planning scheme according to the target parameters, wherein the evaluation index comprises an efficiency evaluation index, an economical efficiency evaluation index and a reliability evaluation index; The second determining module is used for determining a first score corresponding to the efficiency evaluation index, a second score corresponding to the economical evaluation index and a third score corresponding to the reliability evaluation index according to each evaluation index and the preset relation between each evaluation index and the score; The third determining module is used for determining a first weight corresponding to the efficiency evaluation index, a second weight corresponding to the economical evaluation index and a third weight corresponding to the reliability evaluation index by adopting an analytic hierarchy process; The fourth determining module is used for carrying out weighted summation on the first score, the second score and the third score according to the first weight, the second weight and the third weight to obtain a comprehensive score of the offshore wind power direct current collection system planning scheme; And the fifth determining module is used for screening a target offshore wind power direct current collection system planning scheme from the plurality of offshore wind power direct current collection system planning schemes according to the comprehensive scores of the offshore wind power direct current collection system planning schemes.
10. An electronic device comprising a processor and a memory storing computer program instructions; the processor, when executing the computer program instructions, implements a method for estimating a capacity configuration of an offshore wind power direct current collection system according to any one of claims 1-8.
11. A computer readable storage medium, wherein computer program instructions are stored on the computer readable storage medium, which when executed by a processor, implement the offshore wind power direct current collection system capacity configuration assessment method according to any one of claims 1-8.
12. A computer program product, characterized in that instructions in the computer program product, when executed by a processor of an electronic device, enable the electronic device to perform the offshore wind power direct current collection system capacity configuration evaluation method according to any one of claims 1-8.

Description

Capacity configuration evaluation method for offshore wind power direct current collection system Technical Field The application belongs to the field of power system planning, and particularly relates to a capacity configuration evaluation method, device and equipment for an offshore wind power direct current collection system. Background In recent years, with the global increase of clean energy demand and comprehensive development and utilization of ocean resources, offshore wind power is an important renewable energy form, and the construction scale of the offshore wind power is rapidly enlarged. Under the background, the planning of the offshore wind power direct current collection system, and the screening and the optimization of a planning scheme become important steps before the implementation of wind power plant engineering. In the related technology, the planning scheme of the offshore wind power direct current collection system evaluates a multi-dependency experience threshold method, and the method has the core defects that the multi-dimensional constraint of the power system is not fully coupled, only the economic evaluation index is focused for decision making, the evaluation result is high in subjectivity, the engineering requirement of deep-far offshore wind power differentiation is difficult to adapt, and the large-scale and high-quality development of the offshore wind power direct current collection system is restricted. Disclosure of Invention The embodiment of the application provides a capacity configuration evaluation method, device and equipment for an offshore wind power direct current collection system, which can evaluate planning schemes of the offshore wind power direct current collection system from multiple dimensions of efficiency, economy and reliability, screen target planning schemes from the multiple planning schemes by adopting a standardized evaluation flow, avoid interference of human subjective factors on evaluation results, ensure that comparison of the multiple planning schemes has unified reference, and the evaluation results have higher credibility, repeatability and comparability, and provide scientific basis for engineering decision. In a first aspect, an embodiment of the present application provides a method for evaluating capacity configuration of an offshore wind power direct current collection system, where the screening method includes: Obtaining target parameters corresponding to each of a plurality of offshore wind power direct current collection system planning schemes, wherein the target parameters comprise rated capacity, topological structure, equipment parameters, fault parameters and cost parameters of the offshore wind power direct current collection system; for each offshore wind power direct current collection system planning scheme, determining an evaluation index of the offshore wind power direct current collection system planning scheme according to target parameters, wherein the evaluation index comprises an efficiency evaluation index, an economical efficiency evaluation index and a reliability evaluation index; Determining a first score corresponding to the efficiency evaluation index, a second score corresponding to the economical evaluation index and a third score corresponding to the reliability evaluation index according to each evaluation index and the preset relation between each evaluation index and the score; adopting an analytic hierarchy process to determine a first weight corresponding to the efficiency evaluation index, a second weight corresponding to the economical efficiency evaluation index and a third weight corresponding to the reliability evaluation index; according to the first weight, the second weight and the third weight, carrying out weighted summation on the first score, the second score and the third score to obtain a comprehensive score of the offshore wind power direct current collection system planning scheme; and screening the target offshore wind power direct current collection system planning schemes from the plurality of offshore wind power direct current collection system planning schemes according to the comprehensive scores of the offshore wind power direct current collection system planning schemes. In some embodiments, the efficiency evaluation index includes a total power loss rate, the equipment parameters include cable parameters and wind turbine parameters, and accordingly, determining the efficiency evaluation index of the offshore wind power direct current collection system planning scheme according to the target parameters includes: Determining the number of target cables, the number of fans collected on each target cable and the distance between fans according to the topological structure; determining networking power loss according to the number of target cables, cable parameters, the number of fans collected on each target cable and the distance between fans; Determining fan power loss accordin