Monitoring and protecting system of split-type boost power distribution device of wind turbine generator

Abstract

The utility model discloses a monitoring protection system of a split type boost power distribution device of a wind turbine generator, comprising an MCU control unit, the MCU control unit is respectively connected with a BIM module and a DIM module through optical cables, the BIM module and the DIM module are respectively connected with a boost device and a power distribution device through control cables, and the boost device and the power distribution device are respectively connected with the BIM module and the DIM module. Collecting data of secondary current, secondary voltage, operating temperature and arc light quantity of the boosting device and the power distribution device; the BIM module is connected with a low-voltage circuit breaker in the boosting device through a circuit, the MCU control unit controls opening and closing of the low-voltage circuit breaker through the BIM module, the DIM module is connected with a high-voltage circuit breaker in the power distribution device through a circuit, and the MCU control unit controls opening and closing of the high-voltage circuit breaker through the DIM module. According to the utility model, full-range monitoring and protection of the boosting device and the power distribution device of the wind turbine generator are realized, and the equipment reliability and the operation safety of the split-type boosting power distribution device of the wind turbine generator are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of monitoring equipment, and in particular relates to a monitoring and protection system for a split-type boost distribution device of a wind turbine group. Background Art

[0002] At present, the booster and distribution devices of onshore wind turbines are gradually changing from an integral structure to a split structure. The integral structure is to place the booster and distribution devices on the ground tens of meters away from the wind turbine, and there will be considerable losses during power transmission. The split structure is to separate the booster and distribution devices, and place the booster in the top cabin of the wind turbine, and the distribution device on the bottom platform of the wind turbine. Since the booster is closer to the generator, the power conversion efficiency is higher, fewer cables are required, thereby reducing investment and increasing profits. It is the future development direction.

[0003] In the traditional split-type booster and distribution device, the booster and distribution devices are equipped with monitoring and protection respectively, and the two are independent of each other and do not communicate with each other. Due to the lack of a unified top-level logic design, the following situations may occur: ① The booster and distribution devices cannot realize program automatic control, and the operation instructions need to be manually confirmed; ② The protection of the booster and distribution devices cannot be synchronized, and full-range fast-acting protection cannot be realized; ③ The booster and distribution devices lack optical fiber sensors and cannot predict the non-electrical state of the equipment. The above problems limit the operating efficiency of the booster and distribution devices, increase the workload of operation and maintenance, and bring risks to the safety and reliability of the operation of the booster and distribution devices. Utility Model Content

[0004] The utility model aims to provide a monitoring and protection system for a wind turbine group split-type boost distribution device, which realizes full-range monitoring and protection of the wind turbine group boost device and the distribution device, and improves the equipment reliability and operation safety of the wind turbine group split-type boost distribution device.

[0005] The technical solution adopted by the utility model is: a monitoring and protection system for a split booster distribution device of a wind turbine group, including an MCU control unit, the MCU control unit is respectively connected to a BIM module and a DIM module through optical cables, the BIM module and the DIM module are respectively connected to a booster device and a distribution device through control cables, and collects data on secondary current, secondary voltage, operating temperature and arc quantity of the booster device and the distribution device;

[0006] The BIM module is connected to the low-voltage circuit breaker inside the booster device through the circuit, and the MCU control unit controls the opening and closing of the low-voltage circuit breaker through the BIM module. The DIM module is connected to the high-voltage circuit breaker inside the distribution device through the circuit, and the MCU control unit controls the opening and closing of the high-voltage circuit breaker through the DIM module.

[0007] The utility model is also characterized in that:

[0008] The model of the MCU control unit is HF-XBJK2000D-P_MCU.

[0009] The model of the BIM module is HF-XBJK2000D-P_BIM.

[0010] The model of the DIM module is HF-XBJK2000D-P_DIM.

[0011] The BIM module is connected to a pair of temperature sensors and a pair of arc sensors through optical fibers; the pair of temperature sensors are respectively arranged at the power cable terminal positions on both sides outside the boost device; the pair of arc sensors are arranged inside the boost device, and the pair of arc sensors are respectively arranged at the low-voltage circuit breaker and contact positions in the boost transformer winding;

[0012] The BIM module is connected to a current and voltage transformer through a control cable. The two ends of the current and voltage transformer are connected to the low-voltage circuit breaker and the step-up transformer through lines respectively, so as to collect the secondary current and secondary voltage on the low-voltage side of the step-up device.

[0013] The DIM module is connected to a pair of temperature sensors and arc sensors through optical fibers; the pair of temperature sensors are respectively arranged at the power cable terminals inside and outside the power distribution device; the arc sensor is located at the contact position of the high-voltage circuit breaker;

[0014] The DIM module is connected to a current and voltage transformer through a control cable. Both ends of the current and voltage transformer are connected to the isolation grounding switch and step-up transformer inside the distribution device through lines, respectively, to collect the secondary current and secondary voltage of the distribution device.

[0015] The beneficial effect of the utility model is that the monitoring and protection system of the split booster distribution device of the wind turbine group of the utility model collects the secondary current, secondary voltage, operating temperature and arc amount of the booster device and the distribution device by respectively arranging a BIM module and a DIM module in the booster device and the distribution device, and connecting the BIM module and the DIM module with the current and voltage transformers, the temperature sensor and the arc sensor.

[0016] An MCU control unit is also set up in the wind turbine set. By receiving the booster and distribution device data collected by the BIM module and the DIM module, the functions of temperature monitoring alarm, arc protection tripping, and differential protection tripping of the booster and distribution devices are realized. Through a unified top-level logic design, full-range monitoring and protection are realized, which improves the equipment reliability and operation safety of the wind turbine set's split booster and distribution device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of a monitoring and protection system of a split-type boost distribution device for a wind turbine group.

[0018] In the figure, 1. booster device, 2. BIM module, 3. power distribution device, 4. DIM module, 5. MCU control unit, 6. current and voltage transformer, 7. temperature sensor, 8. arc sensor, 9. low voltage circuit breaker, 10. high voltage circuit breaker, 11. isolating grounding switch, 12. booster transformer. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] like Figure 1 As shown, the monitoring and protection system of the split boost distribution device of the wind turbine group of the utility model includes an MCU control unit 5, a BIM module 2 and a DIM module 4. The MCU control unit 5 is connected to the BIM module 2 and the DIM module 4 respectively through optical cables. The BIM module 2 and the DIM module 4 are respectively connected to the boost device 1 and the distribution device 3 through control cables, so as to collect data such as secondary current, secondary voltage, operating temperature and arc quantity of the boost device 1 and the distribution device 3; and transmit the collected data to the MCU control unit 5, so as to realize the functions of temperature monitoring alarm, arc protection tripping and differential protection tripping of the boost device 1 and the distribution device 3.

[0022] Preferably, the model of the MCU control unit 5 is HF-XBJK2000D-P_MCU.

[0023] Preferably, the model of the BIM module 2 is HF-XBJK2000D-P_BIM.

[0024] Preferably, the model of the DIM module 4 is HF-XBJK2000D-P_DIM.

[0025] The above-mentioned MCU control unit 5, BIM module 2 and DIM module 4 are all existing technical equipment that can be directly purchased.

[0026] At the same time, the BIM module 2 is connected to the low-voltage circuit breaker 9 inside the boost device 2 through a control cable, and the opening and closing of the low-voltage circuit breaker 9 is controlled by the BIM module 2; the DIM module 4 is connected to the high-voltage circuit breaker 9 inside the power distribution device 4 through a control cable, and the opening and closing of the high-voltage circuit breaker 10 is controlled by the DIM module 4.

[0027] That is, after receiving the secondary current and secondary voltage data of the booster device 1 and the power distribution device 3, the MCU control unit 5 automatically selects whether to output a protection tripping instruction, such as differential quick-break protection, overcurrent protection, overvoltage protection, zero-sequence current protection, etc., by matching the protection logic of the booster device 1 and the power distribution device 3. The protection tripping instruction needs to be transmitted to the BIM module 2 and the DIM module 4 through the optical fiber channel, and the low-voltage circuit breaker 9 or the high-voltage circuit breaker 10 is tripped through the operating loop in the module.

[0028] Example 2

[0029] Based on Example 1, the BIM module 2 of the utility model is connected to a pair of temperature sensors 7 and a pair of arc sensors 8 through lines; the pair of temperature sensors 7 are located at the power cable terminals on both sides outside the boost device 1, and the operating temperature of the high-voltage cable head is monitored in real time through fluorescent optical fiber temperature measurement technology.

[0030] A pair of arc sensors 8 are arranged inside the boost device 1, that is, the arc sensors 8 are arranged at the contact position of the low-voltage circuit breaker 9 and in the winding of the boost transformer 12, and the amount of arc released by the contact when the low-voltage circuit breaker 9 is actuated and the amount of arc flashed by the shell of the boost transformer 12 are monitored in real time through the optical fiber temperature measurement technology;

[0031] The BIM module 2 is connected to a current and voltage transformer 6 via a control cable, and both ends of the current and voltage transformer 6 are respectively connected to a low-voltage circuit breaker 9 and a step-up transformer 12 via lines, so as to collect the secondary current and secondary voltage of the step-up device 1 .

[0032] That is, the BIM module 2 collects the secondary current and secondary voltage on the low-voltage side of the boost device 1 through the current and voltage transformer 6 installed at the boost device 1, and receives the data sent by the temperature sensor 7 and the arc sensor 8. All data are transmitted to the MCU control unit 5 through the preset optical fiber channel, and participate in the overall calculation and processing of the DIM module 4 data.

[0033] Example 3

[0034] Based on Example 1, the DIM module of the utility model is connected to a pair of temperature sensors 7 and arc sensors 8 through optical fibers; the pair of temperature sensors 7 are respectively arranged at the power cable terminals inside and outside the distribution device 3, and the operating temperature of the low-voltage cable head is monitored in real time through fluorescent optical fiber temperature measurement technology.

[0035] The arc sensor 8 is arranged at the contact position of the high-voltage circuit breaker 10, and uses the optical fiber temperature measurement technology to monitor the arc amount released by the contact when the high-voltage circuit breaker 10 is actuated in real time. The DIM module 4 is connected to the current and voltage transformer 6 through the control cable, and is used to collect the secondary current and secondary voltage of the power distribution device 3.

[0036] That is, the DIM module 4 collects the secondary current and secondary voltage through the current and voltage transformer 6 installed in the power distribution device 3, and receives the data sent by the temperature sensor 7 and the arc sensor 8. All data are transmitted to the MCU control unit 5 through the preset optical fiber channel, and participate in the overall calculation and processing of the BIM module 2 data.

[0037] Example 4

[0038] On the basis of Example 2 or Example 3, the MCU control unit 5 of the utility model is connected to the monitor and the alarm through the control cable, and the data of the boost device 1 and the distribution device 3 collected by the BIM module 2 and the DIM module 4 are read and displayed through the monitor, so that the staff can observe the data and record the status in time; the alarm is used for alarm when the equipment fails, and the staff is notified to shut down the equipment for inspection as soon as possible.

[0039] Specifically, the MCU control unit 5 monitors the real-time temperature of the boost device 1 and the distribution device 3 to determine whether the temperature rise of key positions such as the incoming and outgoing cables and the busbar crimping joints exceeds the standard. When the temperature exceeds the limit, it can be displayed through the monitor and the alarm can be used to warn the operating staff on duty. If necessary, the low-voltage circuit breaker 9 or the high-voltage circuit breaker 10 can also be tripped.

[0040] Specifically, the MCU control unit 5 determines the operating status of the protected equipment by monitoring the arc radiation of the boost device 1 and the distribution device 3. If the arc intensity exceeds the limit, the protected equipment will be judged as a fault state, and the corresponding protection tripping instruction needs to be initiated to quickly cut off the faulty component through the BIM module 2 and the DIM module 4.

[0041] The application of split-type booster distribution devices in onshore wind turbines will become more and more common. This solution achieves full-range monitoring and protection through a unified top-level logic design, improves the equipment reliability and operational safety of split-type booster distribution devices in wind turbines, fills the technical gap in the comprehensive monitoring of split-type booster distribution devices, reduces the workload of operation and maintenance, and significantly improves the operation and maintenance level of wind turbines.

Claims

1. A monitoring and protection system for a split booster distribution device of a wind turbine group, characterized in that: The MCU control unit (5) is respectively connected to a BIM module (2) and a DIM module (4) via optical cables, and the BIM module (2) and the DIM module (4) are respectively connected to a booster device (1) and a power distribution device (3) via control cables to collect data on secondary current, secondary voltage, operating temperature and arc quantity of the booster device (1) and the power distribution device (3); The BIM module (2) is connected to a low-voltage circuit breaker (9) inside the boost device (1) via a circuit, and the MCU control unit (5) controls the opening and closing of the low-voltage circuit breaker (9) via the BIM module (2); the DIM module (4) is connected to a high-voltage circuit breaker (10) inside the power distribution device (3) via a circuit, and the MCU control unit (5) controls the opening and closing of the high-voltage circuit breaker (10) via the DIM module (4).

2. The monitoring and protection system for the split boost distribution device of a wind turbine group according to claim 1 is characterized in that: The model of the MCU control unit (5) is HF-XBJK2000D-P_MCU.

3. The monitoring and protection system for the split boost distribution device of a wind turbine group according to claim 1 is characterized in that: The model of the BIM module (2) is HF-XBJK2000D-P_BIM.

4. The monitoring and protection system for the split boost distribution device of a wind turbine group according to claim 1 is characterized in that: The model of the DIM module (4) is HF-XBJK2000D-P_DIM.

5. The monitoring and protection system for the split boost distribution device of a wind turbine group according to any one of claims 1 to 4, characterized in that: The BIM module (2) is connected to a pair of temperature sensors (7) and a pair of arc sensors (8) via optical fibers; the pair of temperature sensors (7) are respectively arranged at power cable terminal positions on both sides of the outside of the boost device (1); the pair of arc sensors (8) are arranged inside the boost device (1), and the pair of arc sensors (8) are respectively arranged at low-voltage circuit breakers (9) and contact positions in the windings of the boost transformer (12); The BIM module (2) is connected to a current and voltage transformer (6) via a control cable, and two ends of the current and voltage transformer (6) are respectively connected to a low-voltage circuit breaker (9) and a step-up transformer (12) via lines, for collecting secondary current and secondary voltage on the low-voltage side of the step-up device (1).

6. The monitoring and protection system for the split boost distribution device of a wind turbine group according to any one of claims 1 to 4, characterized in that: The DIM module is connected to a pair of temperature sensors (7) and an arc sensor (8) via optical fibers; the pair of temperature sensors (7) are respectively arranged at power cable terminals inside and outside the power distribution device (3); the arc sensor (8) is located at a contact position of a high-voltage circuit breaker (10); The DIM module (4) is connected to a current and voltage transformer (6) via a control cable, and two ends of the current and voltage transformer (6) are respectively connected to an isolation grounding switch (11) and a step-up transformer (12) inside the power distribution device (3) via lines, so as to collect secondary current and secondary voltage of the power distribution device (3).

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