CN-121981058-A - Current collecting system modeling method, device, equipment and medium for new energy station

CN121981058ACN 121981058 ACN121981058 ACN 121981058ACN-121981058-A

Abstract

The invention relates to the technical field of electric power simulation modeling and discloses a method, a device, equipment and a medium for modeling a current collecting system of a new energy station, wherein the method comprises the steps of constructing a new energy power generation equipment simplified model, a direct current converter simplified model and each section of cable simplified model in a current collecting circuit; determining an electrical connection relation between a new energy power generation equipment simplified model and a direct current converter simplified model according to the circuit topology of an actual current collecting system; the invention can reduce the number of electrical nodes, ensure that the number of the electrical nodes does not exceed the maximum electrical node limit of simulation software, reduce the simulation calculation amount and improve the simulation efficiency.

Inventors

SONG YANG
GOU LIFENG
LI XIAOTONG
LI ZONGSHANG
WANG CE
LIAO ANRAN
WANG YIFAN
XUE YINGLIN
WANG YIN
GUO YONGQI
TANG BOJIN
CHANG YONG
CHEN MEIFU
GAO WEI

Assignees

中国长江三峡集团有限公司

Dates

Publication Date: 20260505
Application Date: 20260121

Claims (10)

1. A method of modeling a current collection system for a new energy station, the method comprising: Constructing a new energy power generation equipment simplified model, a direct current converter simplified model and each section of cable simplified model in the current collecting circuit; Determining an electrical connection relation between the new energy power generation equipment simplified model and the direct current converter simplified model according to the circuit topology of the actual current collecting system; and connecting the new energy power generation equipment simplified model and the direct current converter simplified model by utilizing the cable simplified model based on the electric connection relation.
2. The method of claim 1, wherein the process of constructing the new energy power generation facility simplified model comprises: And constructing a power generation equipment control loop and a plurality of first controlled voltage sources, and connecting the output end of the power generation equipment control loop with the first controlled voltage sources, wherein each first controlled voltage source is used for replacing a switching device of each phase in the actual new energy power generation equipment, and the control method of the power generation equipment control loop is the same as that adopted by the actual new energy power generation equipment.
3. The method of claim 2, wherein the process of constructing the new energy power generation facility simplified model further comprises: And constructing a plurality of first inductors, and respectively connecting the first inductors with the output ends of the corresponding first controlled voltage sources.
4. The method according to claim 1, wherein the process of constructing the simplified model of the dc converter comprises: And constructing a converter control loop and a plurality of second controlled voltage sources, and connecting the output end of the converter control loop with the second controlled voltage sources, wherein each second controlled voltage source is used for replacing a submodule of two bridge arms of each phase in an actual direct current converter, and the control method of the converter control loop is the same as that adopted by the actual direct current converter.
5. The method of claim 4, wherein the process of constructing the simplified model of the dc converter further comprises: And constructing a plurality of second inductors, and respectively connecting the second inductors with the output ends of the corresponding second controlled voltage sources.
6. The method of claim 1, wherein the cable simplification model construction process comprises: And constructing a PI model for replacing the cable according to the length and the distribution parameters of the actual cable.
7. The method of claim 6, wherein the PI model comprises a first resistor, a third inductor, a first capacitor and a second capacitor, wherein a first end of the first resistor is grounded through the first capacitor, a second end of the first resistor is connected with a first end of the third inductor, a second end of the third inductor is grounded through the second capacitor, and impedance values of the first resistor and the third inductor are calculated through a length of an actual cable and a distribution parameter.
8. A current collection system modeling apparatus for a new energy station, the apparatus comprising: The simplified model construction module is used for constructing a new energy power generation equipment simplified model, a direct current converter simplified model and each section of cable simplified model in the current collection circuit; The connection relation determining module is used for determining the electrical connection relation between the new energy power generation equipment simplified model and the direct current converter simplified model according to the circuit topology of the actual current collecting system; and the simplified model connection module is used for connecting the new energy power generation equipment simplified model and the direct current converter simplified model by utilizing the cable simplified model based on the electric connection relation.
9. An electronic device, comprising: a memory and a processor communicatively coupled to each other, the memory having stored therein computer instructions that, upon execution, perform the method of modeling a collector system for a new energy site of any of claims 1-7.
10. A computer-readable storage medium having stored thereon computer instructions for causing a computer to execute the current collecting system modeling method for a new energy station according to any one of claims 1 to 7.

Description

Current collecting system modeling method, device, equipment and medium for new energy station Technical Field The invention relates to the technical field of electric power simulation modeling, in particular to a method, a device, equipment and a medium for modeling a current collecting system of a new energy station. Background With the increasing trend of intensive and continuous development of new energy stations, the capacity of the stations is continuously improved, the number of devices is increased, and a current collecting system is also more complicated. Aiming at the problem that new energy is sent out of the engineering through flexible direct delivery, detailed modeling analysis is required to be carried out on the problems of overvoltage, short-circuit current, resonance and the like of a system in the early stage of the complete design of the engineering, and basis is provided for system parameter design and equipment type selection. For a large-capacity new energy station, as the number of equipment reaches hundreds of equipment, difficulty is brought to system modeling, if a complete current collection system model containing all equipment in the station is built, the model is extremely large in scale, the simulation efficiency is seriously reduced, and even the number of electrical nodes which can be accommodated by simulation software is exceeded. Therefore, a modeling method capable of effectively improving the simulation efficiency of the current collection system of the large-scale new energy station is needed at present. Disclosure of Invention The invention provides a method, a device, equipment and a medium for modeling a collecting system of a new energy station, which are used for at least solving the problem of low simulation efficiency of the collecting system of the large-scale new energy station. In a first aspect, the present invention provides a method for modeling a current collection system for a new energy station, the method comprising: Constructing a new energy power generation equipment simplified model, a direct current converter simplified model and each section of cable simplified model in the current collecting circuit; Determining an electrical connection relation between a new energy power generation equipment simplified model and a direct current converter simplified model according to the circuit topology of an actual current collecting system; and connecting the new energy power generation equipment simplified model with the direct current converter simplified model by using the cable simplified model based on the electric connection relation. In an alternative embodiment, the process of constructing the new energy power generation device simplified model includes: The method comprises the steps of constructing a power generation equipment control loop and a plurality of first controlled voltage sources, and connecting the output end of the power generation equipment control loop with the first controlled voltage sources, wherein each first controlled voltage source is used for replacing a switching device of each phase in the actual new energy power generation equipment, and the control method of the power generation equipment control loop is the same as that adopted by the actual new energy power generation equipment. In an alternative embodiment, the process of constructing the simplified model of the new energy power generation device further includes: And constructing a plurality of first inductors, and respectively connecting the first inductors with the output ends of the corresponding first controlled voltage sources. In an alternative embodiment, the construction process of the simplified model of the direct current converter includes: And constructing a converter control loop and a plurality of second controlled voltage sources, and connecting the output end of the converter control loop with the second controlled voltage sources, wherein each second controlled voltage source is used for replacing sub-modules of two bridge arms of each phase in the actual direct current converter, and the control method of the converter control loop is the same as that adopted by the actual direct current converter. In an alternative embodiment, the construction process of the simplified model of the dc converter further includes: and constructing a plurality of second inductors, and respectively connecting the second inductors with the output ends of the corresponding second controlled voltage sources. In an alternative embodiment, the construction process of the cable simplification model includes: And constructing a PI model for replacing the cable according to the length and the distribution parameters of the actual cable. In an alternative embodiment, the PI model includes a first resistor, a third inductor, a first capacitor and a second capacitor, where a first end of the first resistor is grounded through the first capacitor, a second end of the first resisto