A wind farm direct-buried cable power collection line fault positioning system
By introducing a centralized monitoring system and pulse generator into the direct-buried cable collection lines of wind farms, and combining this with transient traveling wave signal analysis, the problem of difficult fault location was solved, enabling rapid and economical fault location and repair.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHEAST ELECTRIC POWER DESIGN INST CO LTD OF CHINA POWER ENG CONSULTING GRP
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-02
AI Technical Summary
The difficulty in locating faults in the direct-buried cable collection lines of wind farms leads to long maintenance times and high costs, which affects power generation revenue.
By employing a centralized monitoring server for wind farms, a line monitoring server, a signal transmission module, a data processing module, and a fault location module, combined with a pulse generator and a GIS system, the fault point can be quickly located through transient traveling wave signal analysis.
It enables rapid and accurate fault location, reduces operation and maintenance costs and power generation loss, and improves maintenance efficiency.
Smart Images
Figure CN224317727U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of cable line fault location technology, and in particular relates to a fault inspection and location system for direct-buried cable collector lines in wind farms, which is used to locate the coordinates of line fault points and quickly repair them. Background Technology
[0002] As my country continues to advance its goal of "carbon peaking and carbon neutrality," wind farm projects are entering a peak period of development and construction. More and more wind farm collection lines are using direct-buried cables, which are used in complex environments and have long paths. During operation, the cables may experience faults such as open circuits or grounding short circuits due to external forces, corrosion, joint failures, or damage to the outer sheath. This results in the loss of grid-connected electricity during maintenance, thus affecting power generation revenue.
[0003] Due to factors such as surface properties, laying environment, and deep plowing of farmland along the route, the direct burial depth of cables is often more than 1 meter, making fault location difficult. Conventional manual inspections along the route are time-consuming, and large-scale excavation for fault location is costly. Therefore, the fault location system for the direct-buried cable collector lines in this wind farm helps to quickly locate fault points, which is of great significance for reducing line maintenance costs and minimizing power generation losses. Utility Model Content
[0004] The purpose of this invention is to provide a fault location system for direct-buried cable collector lines in wind farms, thereby quickly determining the location of fault points on the circuit of the direct-buried cable collector line, saving maintenance personnel the time for troubleshooting along the line, reducing temporary land occupation and earthwork excavation costs, and reducing wind turbine downtime and power generation loss, resulting in significant economic benefits.
[0005] The technical solution to achieve the above-mentioned utility model objective is as follows:
[0006] A fault location system for a direct-buried cable collector line in a wind farm includes a wind farm centralized monitoring server, a line monitoring server, a signal transmission module, a data processing module, a fault location module, and a pulse generator. The wind farm centralized monitoring server and the line monitoring server are installed in the control room of the substation. The signal transmission module, data processing module, and fault location module are integrated and installed inside the line monitoring server. The pulse generator is installed at both ends of the direct-buried cable collector line. The wind farm centralized monitoring server and the line monitoring server are networked and connected in the control room of the substation to control the line monitoring server in a coordinated manner.
[0007] Furthermore, the pulse generator and the line monitoring server transmit data through a signal transmission module. The line monitoring server is used to collect the status information of relevant equipment on the power collection line for visualization and to send commands, and to establish a database of the original coordinate path map of the power collection line and store it on the host of the line monitoring server. The signal transmission module includes an optical fiber or wireless network, which is used to transmit the collected pulse generator data to the line monitoring server in real time.
[0008] Furthermore, the data processing module transmits data with the fault location module. The data processing module mainly collects real-time information of the transient traveling wave signal from the pulse generator through the line monitoring server, and calculates the traveling wave distance based on the time difference between the transmitted signal wave and the returned reflected wave according to the principle of pulse reflection, which is used to analyze the cable length of the line fault point from the pulse generator. The fault location module is compatible with GIS systems or CAD graphics import and has the function of identifying equipment codes and corresponding linear distances. When a line fault occurs, the fault point coordinates are extracted from the original coordinate path map database of the power collection line based on the length distance input by the data processing module and displayed on the line monitoring server.
[0009] The beneficial effects of this utility model are as follows:
[0010] 1) This cable line fault location system is simple to operate and highly automated, making it convenient for wind farm operation and maintenance personnel to operate. After a fault occurs in the direct-buried cable collection line of the wind farm, the fault point can be quickly located and the fault point can be reached for repair, saving operation and maintenance personnel the time to investigate along the line and effectively improving the efficiency of fault location and repair of direct-buried cable lines.
[0011] 2) This cable line fault location system is designed for the rapid location of fault points in the wind farm collection line system. Compared with conventional manual inspection and troubleshooting along the line, it can reduce the cost of earthwork excavation and temporary occupation of land for maintenance. While quickly repairing and restoring the collection line to safe operation, it can effectively reduce the loss of power generation during the maintenance of the collection line, resulting in significant economic benefits. Attached image description:
[0012] Figure 1 Schematic diagram of a fault location system for direct-buried cable collector lines in a wind farm;
[0013] Figure 2 A simplified layout diagram for a fault location system of a direct-buried cable collector line in a wind farm.
[0014] In the diagram: 1. Wind farm centralized monitoring server, 2. Line monitoring server, 3. Signal transmission module, 4. Data processing module, 5. Fault location module, 6. Pulse generator, 7. Original coordinate path of the collector line. Detailed Implementation
[0015] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0016] The system diagram shown in the attached figure is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described.
[0017] The following describes some embodiments of this application in detail with reference to the accompanying drawings. Referring to the technical solution of this utility model... Figure 1 and Figure 2 During the construction of the wind farm project, a pulse generator 6 is installed at both ends of each direct-buried cable collection line. A line monitoring server 2 is installed in the control room of the substation. The server integrates a signal transmission module 3, a data processing module 4, and a fault location module 5. The line monitoring server 2 transmits signal data with the pulse generator 6 through fiber optic communication or wireless network.
[0018] The host of the wind farm centralized monitoring server 1 in the substation control room is networked with the host of the line monitoring server 2, which can control the line monitoring server 2 in a coordinated manner. The real-time data of the pulse generator 6 installed on the collection line is collected through the signal transmission module 3 and transmitted to the data processing module 4 for processing and analysis. It should be noted that the wind farm centralized monitoring server 1 is common knowledge in the industry.
[0019] Upon completion of the wind farm's collection lines, the original coordinate path map 7 for each direct-buried cable collection line is submitted and input into the host of the line monitoring server 2 to establish a database for storage. At the same time, the position coordinates of each pulse generator 6 are collected and entered into the original coordinate path map 7 of the collection line, and each pulse generator 6 is assigned a corresponding code Ln (n represents the collection line loop number)-Zn (n represents the pulse generator number).
[0020] The line monitoring server 2 first collects the pulse current data of each pulse generator 6 when the line is running normally, and stores it in the host of the line monitoring server 2 as the basic data for determining whether there is a fault point in the line between every two pulse generators 6.
[0021] When the wind farm is running, if the wind farm's centralized monitoring server 1 displays a tripping fault in the Ln circuit of the collector line it monitors in real time, or if the operating data such as the power frequency current and power of the wind turbine and transformer on the circuit are normal, but the data such as the power frequency current and real-time power consumption on the feeder cabinet connected to the substation show transient stability anomalies, it indicates that there is a fault in the cable collector line of the Ln circuit.
[0022] The wind farm centralized monitoring server 1, in conjunction with the control line monitoring server 2, issues logic commands to collect real-time pulse current transient traveling wave signal data of the pulse generator 6 on the Ln circuit in real time, and determines the direct-buried cable line between the two pulse generators (Zn, Zn+1) whose data deviates the largest from the threshold of the stored original pulse current data as the fault occurrence section.
[0023] The data processing module 4 extracts the time difference between the unidirectional signal wave of the pulse generator 6 and its reflected wave at the fault point based on the real-time pulse current data of the two pulse generators 6 in the fault section of the cable line. The data physics module 4 calculates the length distance between the pulse generator 6 and the cable fault point by applying the traveling wave ranging principle of pulse reflection.
[0024] The fault location module 5, starting from the installation positions of two pulse generators 6 (numbered Zn and Zn+1) on the original coordinate path diagram 7 of the power collection line, calculates the traveling wave distance of the cable fault point corresponding to the two pulse generators 6 (numbered Zn and Zn+1) input by the data processing module 4. It then locates the two calculated length endpoints on the Ln loop, determines the midpoint between the two endpoints as the fault location point, extracts the coordinates, and displays them on the line monitoring server 2. Wind farm maintenance personnel quickly proceed to the location of the directly buried cable fault point according to the coordinates for excavation and repair. Application examples confirm that the fault location system for this power collection line is accurate within L*0.2%+3m (where L is the length of the directly buried cable between two adjacent pulse generators).
[0025] The functions of the line monitoring server 2, data processing module 4, signal transmission module 3, and fault location module 5 are common knowledge to those skilled in the art and can be obtained on the market through the functional limitations described herein. This patent does not involve improvements to the program and method, but rather the creative combination, association, and connection of existing common modules to achieve the technical objective intended by this utility model. Technical solutions that achieve the technical objective by combining technical features with the same function are all within the protection scope of this patent. The following defines the functions of common technical terms appearing in the specific embodiments:
[0026] The line monitoring server 2 consists of a display, a status monitoring IED, functional modules, and an intelligent management backend. It is used to collect status information of relevant equipment in the power collection line for visual display and to send instructions, and to store the data in the server host.
[0027] The data processing module 4 mainly collects real-time information of transient traveling wave signals from the pulse generator 6 through the line monitoring server 2. Based on the principle of pulse reflection, it calculates the traveling wave distance by the time difference between the transmitted signal wave and the returned reflected wave, which is used to analyze the cable length of the line fault point from the pulse generator 6.
[0028] The signal transmission module 3 includes an optical fiber or wireless network for transmitting the collected pulse generator 6 data in real time to the line monitoring server 2.
[0029] The fault location module 5 is compatible with GIS systems or CAD graphics import and has the function of identifying equipment codes and corresponding linear distances. When a line fault occurs, the fault point coordinates are extracted from the original coordinate path map 7 database of the power collection line based on the length and distance input by the data processing module 4.
Claims
1. A fault location system for direct-buried cable collector lines in wind farms, characterized in that, The system includes a wind farm centralized monitoring server, a line monitoring server, a signal transmission module, a data processing module, a fault location module, and a pulse generator. The wind farm centralized monitoring server (1) and the line monitoring server (2) are installed in the control room of the substation. The signal transmission module (3), the data processing module (4), and the fault location module (5) are integrated and installed inside the line monitoring server (2). The pulse generator (6) is installed at both ends of the direct-buried cable collection line. The wind farm centralized monitoring server (1) and the line monitoring server (2) are networked and connected in the control room of the substation to control the line monitoring server (2) in a coordinated manner.
2. The fault location system for direct-buried cable collector lines in wind farms according to claim 1, characterized in that, The pulse generator (6) and the line monitoring server (2) transmit data through the signal transmission module (3). The line monitoring server (2) is used to collect the status information of the relevant equipment of the power collection line for visualization and to send instructions. It also stores the original coordinate path map (7) of the power collection line in a database on the host of the line monitoring server (2). The signal transmission module (3) includes an optical fiber or wireless network and is used to transmit the collected pulse generator (6) data to the line monitoring server (2) in real time.
3. The fault location system for direct-buried cable collector lines in wind farms according to claim 1, characterized in that, The data processing module (4) transmits data with the fault location module (5). The data processing module (4) collects real-time information of the transient traveling wave signal of the pulse generator through the line monitoring server (2), and calculates the traveling wave distance based on the pulse reflection method principle by the time difference between the transmitted signal wave and the returned reflected wave, which is used to analyze the cable length of the line fault point from the pulse generator (6). The fault location module (5) is compatible with GIS system or CAD graphic import and has the function of identifying equipment code and corresponding linear distance. When a line fault occurs, the fault point coordinates are extracted from the original coordinate path map (7) database of the power collection line based on the length distance input by the data processing module (4) and displayed on the line monitoring server (2).