A self-consuming power installation method for wind turbine generator electrical systems

Abstract

This invention relates to the field of wind turbine generator sets and discloses a self-dissipating power installation method for the electrical system of wind turbine generator sets. The self-dissipating power installation method includes the following steps: entering the tower base, stopping the wind turbine, opening the main control cabinet door, and disconnecting the 380V main power switch of the main control cabinet; confirming the installation position of the current transformers, disconnecting the three-phase lines, and inserting them into the current transformers respectively. The current transformers are pre-formed (e.g., M4 drill bit) to drill mounting holes for the current transformers on the back plate of the main control cabinet. Each current transformer is equipped with two fixing holes. This invention employs a self-dissipating power installation method for the electrical system of wind turbine generator sets. The implementation of this solution can effectively improve the operation and management efficiency of wind turbine generator sets, enhance the intelligence level of wind farms, and help operators optimize energy management, improve the economic benefits and operational safety of wind turbine generator sets through precise data acquisition and real-time monitoring.

Description

Technical Field

[0001] This invention relates to the field of wind turbine generator sets, specifically to a self-consuming power installation method for the electrical system of a wind turbine generator set. Background Technology

[0002] During operation, wind turbine generators not only generate electricity but also consume a certain amount of electrical energy for the operation of systems such as equipment control, monitoring, and cooling. The actual self-consumption power of the generator is an important parameter for measuring its energy efficiency and optimizing operation and maintenance. Traditionally, wind turbine self-consumption power data is mostly obtained manually or through periodic inspections, but this method suffers from problems such as poor real-time performance, inaccurate data, and inability to monitor equipment operating status in a timely manner.

[0003] In wind turbine units, the self-dissipated power is generally calculated by the control system (such as the main control cabinet and PLC) by measuring current and voltage. However, due to the special operating environment of the unit, directly measuring the three-phase AC voltage is technically challenging. Traditional measurement methods cannot adapt to complex operating conditions, especially under high voltage and high current conditions, making it difficult to provide accurate and stable measurement data.

[0004] Therefore, a new method for collecting and installing self-consumption power is needed. This method involves the proper configuration of electrical equipment and the use of devices such as current transformers and PLCs for accurate measurement and power calculation. This not only enables real-time acquisition of the unit's self-consumption power data but also allows for remote monitoring and data recording via a SCADA system. Summary of the Invention

[0005] The purpose of this invention is to provide a self-consuming power installation method for the electrical system of a wind turbine generator set, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A method for installing self-dissipating power in the electrical system of a wind turbine generator set, the method comprising the following steps: Step 1: Enter the tower base, stop the wind turbine, open the main control cabinet door, and disconnect the 380V main power switch of the main control cabinet. Note that after disconnecting the power, use a test pen or multimeter to measure the voltage to confirm that the power disconnection was successful before proceeding to the next step. Step 2: Confirm the installation location of the current transformer, disconnect the three-phase lines, and thread them into the current transformers respectively. The current transformers are finished products. Use a power drill to drill the mounting holes for the current transformers on the back panel of the main control cabinet. Use an M4 drill bit. Each current transformer has two fixing holes. Use M5 screws to fix the current transformers. When threading the cable into the current transformer, pay attention to the direction of the wire threading. Thread the cable from the P1 side. Step 3: For voltage input, use a 2.5mm flat cable to lead out from terminal 2X0 (L1 / L2 / L3) below the current transformer; for current input, lead out from the current transformer terminal. Step 4: Use a 2.5mm² cable to lead the voltage input from terminal 2X0 (L1 / L2 / L3) below the current transformer and connect it to terminals 11 / 12 / 13 / 16 (L1 voltage / L2 voltage / L3 voltage / N) on the newly added AP3131 module in the main control cabinet. Lead the current input from the current transformer terminals and connect it to terminals 21-26 on the newly added AP3131 module in the main control cabinet. Step 5: Check the overall wiring to ensure that the wiring is correct, the components are securely installed and there is no interference. Power on the main control cabinet and use a clamp meter to check the main line current to see if it matches the display on the main control interface. The control current should be around 20A. If there is a large difference between the value displayed on the main control interface and the actual current value, check the transformation ratio setting. Step 6: Modify the main control software. The main control system collects current and voltage through the newly added X20AP3131 module, calculates the unit's self-consumption power in real time, displays it on the main control screen interface, and transmits relevant signals to the Fengyun system for display via Modbus communication.

[0007] Preferably, the power outage confirmation in step one includes using a voltage measuring instrument to measure the voltage ports of the main control cabinet to ensure that all power supplies are completely disconnected.

[0008] Preferably, the confirmation of the current transformer installation location in step two includes conducting preliminary testing of the electrical system before installation to ensure that there is no current path and to avoid electric shock during installation.

[0009] Preferably, when the current transformer is fixed with an M5 screw in step two, a washer is further used to ensure the tightness and stability of the screw fixing.

[0010] Preferably, the voltage input cable of the current transformer in step three includes a shielded cable with enhanced anti-interference capability.

[0011] Preferably, the connection of the current input through the current transformer terminals in step four includes adding an appropriate fuse protection device to the current input line.

[0012] Preferably, the current measurement in step five includes using a high-precision digital clamp meter and comparing the value displayed on the main control interface in real time.

[0013] Preferably, the software modification described in step six further includes setting the time interval for current and voltage acquisition and the maximum load value in the main control system.

[0014] Preferably, the Modbus communication described in step six includes data synchronization with the Fengyun system via wired or wireless means.

[0015] Preferably, the main control software modification in step six further includes displaying the real-time trend of self-consumption power through a graphical interface and supporting historical data query.

[0016] Compared with the prior art, the present invention has the following beneficial effects: This invention provides real-time monitoring and data recording: This solution combines current transformers, PLCs, and SCADA systems to achieve real-time monitoring and recording of the self-consumption power of wind turbines. Compared with traditional manual inspection, the system can acquire self-consumption power data in real time, greatly improving the accuracy and timeliness of the data.

[0017] Improve operation and maintenance efficiency: By installing automated detection devices, the energy efficiency of wind turbines can be monitored in real time without human intervention during operation, and abnormal self-consumption power can be detected in a timely manner. This reduces the workload of manual inspection and avoids the risk of missing equipment failures or abnormalities.

[0018] Precise power calculation and display: By employing a current transformer, current and voltage values ​​are transmitted to the PLC for calculation, accurately determining the self-dissipated power, which is then displayed through the SCADA system. This solution effectively avoids measurement errors inherent in traditional methods under high-voltage environments, improving the accuracy of power calculation.

[0019] Enhancing System Safety and Stability: This solution, through reasonable electrical installation and current transformer configuration, not only ensures measurement accuracy but also enhances system safety. By using high-precision current transformers and PLC modules, the impact of high-voltage current on the detection equipment is avoided, guaranteeing stable system operation.

[0020] Optimizing wind turbine energy efficiency management: By accurately collecting and displaying the self-consumption power of wind turbines, operators can gain in-depth insights into the energy efficiency of their units, providing a basis for optimizing energy efficiency and reducing operating costs. Simultaneously, it can effectively predict and prevent equipment failures caused by abnormal self-consumption power, reducing maintenance costs and improving the reliability and lifespan of the units.

[0021] Data visualization and remote management: Through integration with the SCADA system, data can be viewed remotely and historical data analysis can be performed, facilitating maintenance personnel to monitor the operating status of wind turbines at any time. Simultaneously, the system supports remote commissioning and maintenance, further improving the management efficiency and emergency response capabilities of wind farms.

[0022] In summary, the implementation of this solution can effectively improve the operation and management efficiency of wind turbine units, enhance the intelligence level of wind farms, and help operators optimize energy management, improve the economic benefits and safety of wind turbine units through precise data collection and real-time monitoring. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the communication circuit of the WEC module for the electrical system of a wind turbine generator set according to the present invention; Figure 2 This is a schematic diagram of the WEC single-wire circuit used in the electrical system of a wind turbine generator set according to the present invention. Figure 3 This is a schematic diagram of the WEC power distribution circuit used in the electrical system of a wind turbine generator set according to the present invention. Figure 4 This is a schematic diagram of the connection circuit between the box-type transformer and the WEC used in the electrical system of a wind turbine generator set according to the present invention.

[0024] Figure 5 This is a schematic diagram showing the connection between the box-type transformer and the WEC used in the electrical system of a wind turbine generator set according to the present invention. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. In the embodiments of the present invention, the different types of cross-sectional lines are not labeled according to national standards, nor do they specify material requirements for the components; they are used to distinguish the cross-sectional views of the components.

[0026] Please see Figure 1-5 A self-dissipating power installation method for an electrical system of a wind turbine generator set, the self-dissipating power installation method comprising the following steps: Step 1: Enter the tower base, stop the wind turbine, open the main control cabinet door, and disconnect the 380V main power switch of the main control cabinet. Note that after disconnecting the power, use a test pen or multimeter to measure the voltage to confirm that the power disconnection was successful before proceeding to the next step. Step 2: Confirm the installation location of the current transformer, disconnect the three-phase lines, and thread them into the current transformers respectively. The current transformers are finished products. Use a power drill to drill the mounting holes for the current transformers on the back panel of the main control cabinet. Use an M4 drill bit. Each current transformer has two fixing holes. Use M5 screws to fix the current transformers. When threading the cable into the current transformer, pay attention to the direction of the wire threading. Thread the cable from the P1 side. Step 3: For voltage input, use a 2.5mm flat cable to lead out from terminal 2X0 (L1 / L2 / L3) below the current transformer; for current input, lead out from the current transformer terminal. Step 4: Use a 2.5mm² cable to lead the voltage input from terminal 2X0 (L1 / L2 / L3) below the current transformer and connect it to terminals 11 / 12 / 13 / 16 (L1 voltage / L2 voltage / L3 voltage / N) on the newly added AP3131 module in the main control cabinet. Lead the current input from the current transformer terminals and connect it to terminals 21-26 on the newly added AP3131 module in the main control cabinet. Step 5: Check the overall wiring to ensure that the wiring is correct, the components are securely installed and there is no interference. Power on the main control cabinet and use a clamp meter to check the main line current to see if it matches the display on the main control interface. The control current should be around 20A. If there is a large difference between the value displayed on the main control interface and the actual current value, check the transformation ratio setting. Step 6: Modify the main control software. The main control system collects current and voltage through the newly added X20AP3131 module, calculates the unit's self-consumption power in real time, displays it on the main control screen interface, and transmits relevant signals to the Fengyun system for display via Modbus communication.

[0027] The power outage confirmation in step one includes using a voltage measuring instrument to measure the voltage ports of the main control cabinet to ensure that all power supplies are completely disconnected.

[0028] The confirmation of the current transformer installation location in step two includes conducting preliminary testing of the electrical system before installation to ensure that there is no current path and to avoid electric shock during installation.

[0029] In step two, when the current transformer is fixed with an M5 screw, a washer is further used to ensure the tightness and stability of the screw fixing.

[0030] The voltage input cable of the current transformer mentioned in step three includes a shielded cable with enhanced anti-interference capability.

[0031] The connection of the current input through the current transformer terminals in step four includes adding an appropriate fuse protection device to the current input line.

[0032] The current measurement in step five involves using a high-precision digital clamp meter and comparing the value displayed on the main control interface in real time.

[0033] The software modification described in step six further includes setting the time interval and maximum load value for current and voltage acquisition in the main control system.

[0034] The Modbus communication mentioned in step six includes data synchronization with the Fengyun system via wired or wireless means.

[0035] The modification of the main control software in step six further includes displaying the real-time trend of self-consumption power through a graphical interface and supporting historical data query.

[0036] The working principle and usage process of this invention: The working principle of this solution is based on the combination of a current transformer and a PLC module. By measuring the three-phase current and voltage of the wind turbine, the self-discharge power of the unit is calculated and monitored in real time. This process involves multiple electrical and automation control technologies, and is mainly achieved through the following steps: The role of current transformers is crucial in wind turbine operation, where the electrical energy consumed by the power equipment is primarily manifested as changes in current and voltage. Directly measuring three-phase voltage and current is impractical for accurately monitoring and calculating self-discharge power, as high voltage and current can negatively impact the measuring equipment. Therefore, this solution employs current transformers (CTs) to transmit current and voltage signals to the PLC module.

[0037] A current transformer works by converting a high current into a low current signal proportional to the original current through electromagnetic induction, allowing the current signal to be processed by ordinary measuring equipment. Specifically, the core component of a current transformer is an iron core wrapped around a conductor. When current flows through the conductor, a magnetic field proportional to the conductor current is generated in the iron core. This magnetic field acts on the secondary winding of the transformer, producing a current signal proportional to the original current. In this way, the current transformer can safely and efficiently convert current signals.

[0038] Power calculation using a PLC, specifically for calculating the self-dissipated power of a wind turbine, requires three-phase current and voltage parameters. According to electrical engineering principles, three-phase power can be calculated using voltage, current, and power factor. In this solution, the current transformer first acquires the three-phase current signals and then transmits these signals to the PLC module. As an automated control device, the PLC possesses powerful data acquisition and processing capabilities. Through the PLC's processing unit, the input current and voltage signals are used to calculate the self-dissipated power.

[0039] The specific calculation formula is as follows:

[0040] After receiving current and voltage signals, the PLC will calculate the self-dissipated power of the wind turbine in real time and transmit the calculation results to the supervisory control and data acquisition (SCADA) system so that staff can monitor the energy efficiency of the wind turbine in real time.

[0041] The integration and display of the SCADA system: SCADA is an industrial control system primarily used for remote monitoring, data acquisition, and control. In this solution, the SCADA system connects to a PLC module, receiving real-time current and voltage data from the PLC and displaying the self-consumption power of the wind turbine.

[0042] In the SCADA system, the data display interface is designed to be user-friendly, showing the real-time self-consumption power, historical power curves, and corresponding current and voltage parameters of each unit. Users can monitor, analyze, and query historical data in real time through the SCADA system. Furthermore, the SCADA system can trigger alarms based on abnormal power fluctuations, notifying maintenance personnel to troubleshoot and repair the problem.

[0043] In wind turbine generators, data transmission and communication protocols between current transformers and PLC modules typically employ standard communication protocols, such as Modbus. Modbus is a common industrial automation communication protocol that enables data transmission and control between multiple devices. Current and voltage data acquired by the PLC module are transmitted to the SCADA system via the Modbus communication protocol for remote monitoring and management.

[0044] The application of the Modbus protocol ensures stable and accurate data transmission throughout the system, and also provides excellent scalability. Through the Modbus protocol, the SCADA system can simultaneously receive data from multiple turbines, monitor the real-time operation of each turbine within the wind farm, and display the self-consumption power of each turbine on a screen.

[0045] Power calculation and data analysis: Through real-time acquisition and processing of current and voltage signals by the PLC module, the system can accurately calculate the self-discharge power of each wind turbine. The accuracy and stability of the data are crucial throughout the entire data transmission chain. The power calculation algorithm built into the PLC module ensures the accuracy of the calculation results, avoiding errors caused by voltage and current fluctuations.

[0046] Furthermore, the SCADA system can store and track self-consumed power over a long period. By analyzing historical data, the system can provide optimization suggestions for the operation and maintenance of wind farms. For example, maintenance personnel can analyze power data fluctuation trends to predict potential unit failures or decreased operating efficiency, and perform maintenance in advance to reduce downtime.

[0047] In addition to monitoring, the SCADA system also possesses certain control functions, enabling adjustments to the wind turbine's operating status through communication with the PLC. For example, when abnormal self-consumption power is detected, the SCADA system can automatically adjust system parameters to optimize the wind turbine's operating status, or notify maintenance personnel to inspect the equipment via an alarm system.

[0048] This real-time control and adjustment function improves the automation level of wind farms, reduces manual intervention, and enhances the operating efficiency and reliability of wind turbine units.

[0049] This solution integrates current transformers, PLCs, and SCADA systems to form a complete wind turbine self-consumption power monitoring system. The current transformer converts high current into low current signals, the PLC calculates the power output, and the SCADA system provides real-time data display and remote monitoring. This series of automation technologies not only enables real-time monitoring of wind turbine self-consumption power but also improves wind farm operation and maintenance efficiency, reduces the risk of failures, and further optimizes wind turbine energy management through data analysis and alarm functions.

[0050] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0051] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A self-consuming power installation method for an electrical system of a wind turbine generator set, characterized in that: The self-powered installation method includes the following steps: Step 1: Enter the tower base, stop the wind turbine, open the main control cabinet door, and disconnect the 380V main power switch of the main control cabinet. Note that after disconnecting the power, use a test pen or multimeter to measure the voltage to confirm that the power disconnection was successful before proceeding to the next step. Step 2: Confirm the installation location of the current transformer, disconnect the three-phase lines, and thread them into the current transformers respectively. The current transformers are finished products. Use a power drill to drill the mounting holes for the current transformers on the back panel of the main control cabinet. Use an M4 drill bit. Each current transformer has two fixing holes. Use M5 screws to fix the current transformers. When threading the cable into the current transformer, pay attention to the direction of the wire threading. Thread the cable from the P1 side. Step 3: For voltage input, use a 2.5mm flat cable to lead out from terminal 2X0 (L1 / L2 / L3) below the current transformer; for current input, lead out from the current transformer terminal. Step 4: Use a 2.5mm² cable to lead the voltage input from terminal 2X0 (L1 / L2 / L3) below the current transformer and connect it to terminals 11 / 12 / 13 / 16 (L1 voltage / L2 voltage / L3 voltage / N) on the newly added AP3131 module in the main control cabinet. Lead the current input from the current transformer terminals and connect it to terminals 21-26 on the newly added AP3131 module in the main control cabinet. Step 5: Check the overall wiring to ensure that the wiring is correct, the components are securely installed and there is no interference. Power on the main control cabinet and use a clamp meter to check the main line current to see if it matches the display on the main control interface. The control current should be around 20A. If there is a large difference between the value displayed on the main control interface and the actual current value, check the transformation ratio setting. Step 6: Modify the main control software. The main control system collects current and voltage through the newly added X20AP3131 module, calculates the unit's self-consumption power in real time, displays it on the main control screen interface, and transmits relevant signals to the Fengyun system for display via Modbus communication.

2. The self-consuming power installation method for a wind turbine generator electrical system according to claim 1, characterized in that: The power outage confirmation mentioned in step one includes using a voltage measuring instrument to measure the voltage ports of the main control cabinet to ensure that all power supplies are completely disconnected.

3. The self-consuming power installation method for a wind turbine generator electrical system according to claim 1, characterized in that: The confirmation of the current transformer installation location in step two includes conducting preliminary tests on the electrical system before installation to ensure there is no current path and to avoid electric shock during installation.

4. The self-consuming power installation method for a wind turbine generator electrical system according to claim 1, characterized in that: When the current transformer is fixed with an M5 screw as described in step two, a washer is further used to ensure the tightness and stability of the screw fixing.

5. The self-consuming power installation method for a wind turbine generator electrical system according to claim 1, characterized in that: The voltage input cable of the current transformer mentioned in step three includes a shielded cable with enhanced anti-interference capability.

6. The self-consuming power installation method for a wind turbine generator electrical system according to claim 1, characterized in that: The connection of the current input through the current transformer terminals mentioned in step four includes adding an appropriate fuse protection device to the current input line.

7. The self-consuming power installation method for a wind turbine generator electrical system according to claim 1, characterized in that: The current measurement described in step five involves using a high-precision digital clamp meter and comparing the value displayed on the main control interface in real time.

8. The self-consuming power installation method for a wind turbine generator electrical system according to claim 1, characterized in that: The software modifications described in step six further include setting the time interval for current and voltage acquisition and the maximum load value in the main control system.

9. The self-consuming power installation method for an electrical system of a wind turbine generator set according to claim 1, characterized in that: The Modbus communication described in step six includes data synchronization with the Fengyun system via wired or wireless means.

10. A self-consuming power installation method for an electrical system of a wind turbine generator set according to claim 1, characterized in that: The main control software modification described in step six further includes displaying the real-time trend of self-consumption power through a graphical interface and supporting historical data query.

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