An acquisition terminal for a signal surge protector

Abstract

The present invention relates to a collection terminal of a signal surge protector, which includes a signal lightning arrester linkage module, a data collection unit and a collection sensor installed on the signal SPD. The signal lightning arrester linkage module is connected to the data collection unit and is used to output a damage signal to the data collection unit. The collection sensor is installed at the grounding position of the signal SPD or on the signal line and is connected to the data collection unit, and the collection sensor transmits the collected data to the data collection unit. The data collection unit transmits the collected damage signal and the collected data of the collection sensor to the intermediate layer or the management layer through three transmission modes of 485 bus signal, NB-IoTs and 5G / 4G for software judgment and analysis. It can not only give a damage judgment under the protection condition, but also ensure that there is no signal interruption.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning protection for wind power, and particularly to an acquisition terminal for a signal surge protector. Background Art

[0002] When a signal lightning arrester (also known as a signal surge protector, abbreviated as signal SPD) is installed on a line, it is necessary to judge its damage condition, and data status acquisition is required for the signal SPD.

[0003] The signal SPD is an electrical safety protection product. However, when providing surge protection for equipment, its own surge protection ability will decrease with the increase in the number of operations, and eventually it will fail due to lightning energy overload. After the signal SPD fails, according to GB / T18802.21, generally three damage modes will occur. Refer to Figure 1 ., short - circuit failure (short - circuit to ground or between lines, signal transmission interrupted, but still having a certain protection function), open - circuit failure of the protection line (open - circuit failure of the protection line, signal transmission not interrupted, but without protection function), open - circuit failure of the transmission line (short - circuit to ground or between lines, signal transmission interrupted, but having a certain protection function).

[0004] Therefore, after the signal SPD fails, it will cause signal interruption and loss of control of the entire wind power system or damage to equipment due to loss of protection during a subsequent lightning strike. In either case, it will cause great economic losses to the wind power, and in a more serious case, it may lead to the out - of - control of the wind power system and damage to the surrounding ecological environment. Therefore, it is necessary to detect the damage of the signal SPD.

[0005] The existing technical solutions in the above have the following defects: The lightning protection devices in the prior art can only monitor the power SPD, and for the signal SPD, only the peak value is monitored, and the sensor cannot completely monitor the failure condition of the signal SPD. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide an acquisition terminal for a signal surge protector, which can give a damage judgment under the existing protection and ensure that there will be no signal interruption.

[0007] The above - mentioned object of the present invention is achieved through the following technical solutions:

[0008] An acquisition terminal for a signal surge protector includes a signal lightning arrester linkage module, a data acquisition unit, and an acquisition sensor installed on the signal SPD;

[0009] The signal lightning arrester linkage module is connected to the data acquisition unit and is used to output a damage signal to the data acquisition unit;

[0010] The acquisition sensor is installed at the grounding position of the signal SPD or on the signal line and is connected to the data acquisition unit, and the acquisition sensor transmits the acquired data to the data acquisition unit;

[0011] The data acquisition unit transmits the acquired damage signal and the acquisition data of the acquisition sensor to the middle layer or the management layer through three transmission methods: 485 bus signal, NB-IoT, and 5G / 4G for software judgment and analysis.

[0012] Through the above technical solution, since the aging damage mechanism of the signal lightning arrester is different from that of the power lightning arrester, it cannot be monitored through leakage current, and since the current of the signal system is extremely small, it is impossible to judge the aging condition of the signal lightning arrester based on the working current or leakage current. In the present invention, the damage signal acquired by the data acquisition unit and the data acquired by the acquisition sensor are transmitted to the middle layer or the management layer for software judgment and analysis, so as to maintain the signal lightning arrester that must be replaced. The sensor can completely monitor the failure condition of the signal SPD, and the signal lightning arrester linkage module itself can give a damage judgment under the protection condition, and can also ensure that there is no signal interruption, effectively overcoming the problems in the prior art.

[0013] In a preferred example of the present invention, it can be further configured that: the acquisition data of the acquisition sensor includes the amplitude, Q value, energy ratio, surge duration, and surge waveform data of each surge.

[0014] Through the above technical solution, the acquisition sensor acquires data in five aspects, realizing all-round monitoring of the signal SPD, so that the sensor can completely monitor the failure condition of the signal SPD.

[0015] In a preferred example of the present invention, it can be further configured that: a linkage electronic switch of a current sensitive device is arranged in the signal lightning arrester linkage module, and the linkage electronic switch is normally in a high resistance or open circuit state;

[0016] The linkage electronic switch is connected with a temperature sensitive device, and the signal lightning arrester linkage module is connected to the power supply.

[0017] Through the above technical solution, the linkage electronic switch is linked with the temperature sensitive device, and a low-temperature material is used as low-temperature solder. When the signal lightning arrester is short-circuited, its current increases, and at this time the linkage electronic switch becomes short-circuited, and at the same time the signal lightning arrester linkage module itself is connected to the power supply, providing enough current to flow through the signal lightning arrester linkage module, causing the temperature sensitive device to act, and then outputting a damage signal to the data acquisition unit. When the signal lightning arrester has an open circuit situation, the linkage electronic switch with an internal current sensitive device is turned on, and at this time the signal flows normally, and the power supply of the signal lightning arrester linkage module itself does not output, and the temperature sensitive device does not act.

[0018] In a preferred embodiment, the present invention can be further configured such that: the acquisition sensor includes a Rogowski coil and a metal shielding housing, and the metal shielding housing is installed outside the Rogowski coil.

[0019] Through the above technical solution, the shielding housing can prevent electromagnetic interference inside and around the wind farm, improving the accuracy of data acquisition.

[0020] In summary, the present invention includes at least one of the following beneficial technical effects:

[0021] 1. The present invention transmits the damaged signal collected by the data acquisition unit and the data collected by the acquisition sensor to the intermediate layer or the management layer for software judgment and analysis, so as to maintain the signal lightning protection that must be replaced. This enables the sensor to completely monitor the failure of the signal SPD, and the signal lightning protection device linkage module itself can give a damage judgment under protection, and can also ensure that there is no signal interruption, effectively overcoming the problems in the prior art.

[0022] 2. The acquisition sensor realizes comprehensive monitoring of the signal SPD by collecting data in five aspects, so that the sensor can completely monitor the failure of the signal SPD.

[0023] 3. The linkage electronic switch links the temperature-sensitive device and uses a low-temperature material as the low-temperature solder. When the signal lightning protection device is short-circuited, its current increases. At this time, the linkage electronic switch becomes short-circuited, and at the same time, the signal lightning protection device linkage module itself is powered on, providing enough current to flow through the signal lightning protection device linkage module, causing the temperature-sensitive device to act, and then outputting a damaged signal to the data acquisition unit. When the signal lightning protection device is open-circuited, the linkage electronic switch with an internal current-sensitive device is turned on, and at this time, the signal flows normally, and the power supply of the signal lightning protection device linkage module itself does not output, and the temperature-sensitive device does not act. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a circuit diagram showing the damage mode of the signal SPD of the present invention.

[0025] Figure 2 It is a structural block diagram of the present invention.

[0026] Figure 3 It is a schematic diagram of the present invention.

[0027] Reference numerals: 10, signal SPD; 11, signal lightning protection device linkage module; 12, data acquisition unit; 13, acquisition sensor. DETAILED DESCRIPTION OF THE INVENTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings.

[0029] Reference Figure 2 As shown in Figure 2 , the acquisition terminal of a signal surge protector disclosed in the present invention includes a signal lightning arrester linkage module 11, a data acquisition unit 12, and a collection sensor 13 installed on the signal SPD10. Since the aging and damage mechanism of the signal lightning arrester is different from that of the power lightning arrester, it cannot be monitored through leakage current. Moreover, due to the extremely small current in the signal system, it is impossible to judge the aging condition of the signal lightning arrester based on the working current or leakage current.

[0030] Among them, the collection sensor 13 is installed at the grounding position of the signal SPD10 or on the signal line and is connected to the data acquisition unit 12. The collection sensor 13 transmits the collected data to the data acquisition unit 12. Among them, the collected data of the collection sensor 13 includes the amplitude, Q value, energy ratio, surge duration, and surge waveform data of each surge. By collecting data in five aspects, the collection sensor 13 realizes all-round monitoring of the signal SPD10, enabling the sensor to completely monitor the failure condition of the signal SPD.

[0031] Furthermore, the collection sensor 13 includes a Rogowski coil and a metal shielding shell, and the metal shielding shell is installed outside the Rogowski coil. The shielding shell can prevent electromagnetic interference inside and around the wind farm, improving the accuracy of data collection.

[0032] Reference Figure 3 As shown in Figure 3 , the signal lightning arrester linkage module 11 is connected to the data acquisition unit 12 and is used to output a damage signal to the data acquisition unit 12. A linkage electronic switch of a current sensitive device is arranged in the signal lightning arrester linkage module 11, and the linkage electronic switch is normally in a high-resistance or open state. The linkage electronic switch is connected to a temperature sensitive device, and the signal lightning arrester linkage module 11 is connected to the power supply.

[0033] The linkage electronic switch is linked to the temperature sensitive device, and a low-temperature material is used as the low-temperature solder. When the signal lightning arrester is short-circuited, its current increases. At this time, the linkage electronic switch becomes short-circuited, and at the same time, the signal lightning arrester linkage module 11 itself is connected to the power supply, providing enough current to flow through the signal lightning arrester linkage module 11, causing the temperature sensitive device to act, and then outputting a damage signal to the data acquisition unit 12.

[0034] When the signal lightning arrester shows an open-circuit situation, the linkage electronic switch with an internal current sensitive device conducts, and at this time, the signal flows normally, and the power supply of the signal lightning arrester linkage module 11 itself does not output, and the temperature sensitive device does not act.

[0035] The data acquisition unit 12 transmits the collected damage signal and the collected data of the collection sensor 13 to the middle layer or management layer through three transmission methods: 485 bus signal, NB-IoTs, and 5G / 4G for software judgment and analysis, so as to maintain the signal lightning arrester that must be replaced.

[0036] The implementation principle of this embodiment is as follows: In the present invention, the damage signals collected by the data acquisition unit 12 and the data collected by the acquisition sensor 13 are transmitted to the middle layer or the management layer for software judgment and analysis, so as to maintain the signal lightning protection that must be replaced. This enables the sensor to completely monitor the failure of the signal SPD, and the signal lightning arrester linkage module 11 itself can give a damage judgment under protection, and can also ensure that there is no signal interruption, effectively overcoming the problems in the prior art.

[0037] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A collection terminal of a signal surge protector, characterized in that: It includes a signal lightning arrester linkage module (11), a data acquisition unit (12), and a collection sensor (13) installed on the signal SPD (10); The signal lightning arrester linkage module (11) is connected to the data acquisition unit (12) and is used to output a damage signal to the data acquisition unit (12); The collection sensor (13) is installed at the grounding position of the signal SPD (10) or on the signal line and is connected to the data acquisition unit (12). The collection sensor (13) transmits the collected data to the data acquisition unit (12); The data acquisition unit (12) transmits, according to the collected damage signal and the collected data of the collection sensor (13), to the intermediate layer or the management layer for software judgment and analysis through three transmission methods: 485 bus signal, NB-IoT, and 5G / 4G; A linkage electronic switch of a current sensitive device and a temperature sensitive device are arranged in the signal lightning arrester linkage module (11), and the linkage electronic switch is normally in a high resistance or open circuit state; The linkage electronic switch is connected to the temperature sensitive device, and the signal lightning arrester linkage module (11) is connected to the power supply; When the signal lightning arrester is short-circuited, its current increases. At this time, the linkage electronic switch becomes short-circuited. At the same time, the signal lightning arrester linkage module (11) itself is connected to the power supply, providing enough current to flow through the signal lightning arrester linkage module (11), causing the temperature sensitive device to act, and then outputting a damage signal to the data acquisition unit (12); When the signal lightning arrester is open-circuited, the linkage electronic switch with an internal current sensitive device is turned on. At this time, the signal flows normally, the power supply of the signal lightning arrester linkage module (11) itself does not output, and the temperature sensitive device does not act.

2. The acquisition terminal of a signal surge protector according to claim 1, characterized in that: The collected data of the collection sensor (13) includes the amplitude, Q value, energy ratio, surge duration, and surge waveform data of each surge; 3. The acquisition terminal of a signal surge protector according to claim 1, characterized in that: The collection sensor (13) includes a Rogowski coil and a metal shielding shell, and the metal shielding shell is installed outside the Rogowski coil.

Images