CN218894732U - Detection equipment of wind generating set - Google Patents

Abstract

The embodiment of the application provides wind generating set's check out test set, check out test set includes first connection interface, interface adaptation circuit and gathers storage module, and first connection interface is used for being connected through the converter electricity in separated time cable and the wind generating set, gathers storage module and is connected through interface adaptation circuit and first connection interface electricity for receive the detected signal of converter. The embodiment of the application can solve the problem that the detection equipment is not easy to detect the relevant signals of the fault moment of the current transformer.

Description

Detection equipment of wind generating set

Technical Field

The application belongs to the technical field of detection, and particularly relates to detection equipment of a wind generating set.

Background

The detection device has very wide application, and can detect electric signals invisible to naked eyes, thereby being convenient for people to study the change process of various electric phenomena. For example, in the wind power technology field, the detection device may perform fault detection on a key component (such as a converter) in the wind generating set.

However, the current detection device usually measures signals through a stylus, and measurement points at some positions in the current transformer are not easily accessible through the stylus, so that measurement is difficult.

Disclosure of Invention

The embodiment of the application provides detection equipment of a wind generating set, which can solve the technical problem that the detection equipment is not easy to perform fault detection on a converter in the wind generating set.

In a first aspect, an embodiment of the present application provides a wind generating set's check out test set, wind generating set's check out test set includes first connection interface, interface adaptation circuit and gathers storage module, wherein: the first connection interface is used for being electrically connected with the converter through a branching cable; the acquisition and storage module is electrically connected with the first connection interface through the interface adaptation circuit and is used for receiving detection signals of the converter.

According to an embodiment of the first aspect of the present application, the detection signal comprises an analog signal; the interface adaptation circuit includes a first interface adaptation circuit, the first interface adaptation circuit including: the first analog switch is electrically connected with the first connection interface and is configured to receive analog quantity signals of the converters of m1 channels input by the first connection interface, and m1 is a positive integer; the first signal conditioning circuit is electrically connected with the first analog switch and the acquisition and storage module respectively and is configured to transmit analog quantity signals of m1 channels to the acquisition and storage module; the first self-checking circuit is electrically connected with the acquisition and storage module and the first analog switch respectively and is configured to receive a first self-checking signal provided by the acquisition and storage module and transmit the first self-checking signal back to the acquisition and storage module through the first analog switch and the first signal conditioning circuit.

Therefore, by setting the first self-checking circuit, the self-checking of the first interface adapting circuit can be realized, namely, whether the first interface adapting circuit breaks down or not is detected, and the accuracy of fault detection of the converter is further improved.

According to any of the foregoing embodiments of the first aspect of the present application, the detection signal comprises a digital quantity signal; the interface adaptation circuit comprises a second interface adaptation circuit comprising: the voltage adjusting circuit is electrically connected with the first connecting interface and is configured to receive digital quantity signals of the m 2-channel converters input by the first connecting interface, and adjust the voltage values of the m 2-channel digital quantity signals to be within a preset voltage range, wherein m2 is a positive integer; the decoder is electrically connected with the acquisition and storage module and is used for converting the first control signal sent by the acquisition and storage module into a second control signal; the second analog switch is electrically connected with the voltage adjusting circuit and the decoder respectively and is configured to respond to a second control signal provided by the decoder to convert the adjusted digital quantity signals of m2 channels into digital quantity signals of n channels, wherein m2 is more than n and n is a positive integer; and the second signal conditioning circuit is electrically connected with the second analog switch and the acquisition and storage module respectively and is configured to transmit digital quantity signals of n channels to the acquisition and storage module.

Therefore, the expansion of the digital quantity signal acquisition channel can be realized through the cooperation of the decoder and the second analog switch, and various acquisition requirements are met.

According to any of the foregoing embodiments of the first aspect of the present application, the second interface adaptation circuit further includes: the second self-checking circuit is electrically connected with the acquisition and storage module and the second analog switch respectively and is configured to receive a second self-checking signal provided by the acquisition and storage module and transmit the second self-checking signal back to the acquisition and storage module through the second analog switch and the second signal conditioning circuit.

Therefore, by setting the second self-checking circuit, the self-checking of the second interface adapting circuit can be realized, namely, whether the second interface adapting circuit breaks down or not is detected, and the accuracy of fault detection of the converter is further improved.

According to any of the foregoing embodiments of the first aspect of the present application, the power input terminal of the detection device is configured to be electrically connected to the power output terminal of the current transformer.

Therefore, the detection equipment can be powered by the electric energy provided by the power output end of the converter, so that a lithium battery or a transformer in the detection equipment is omitted, the volume and the weight of the detection equipment are greatly reduced, and the field equipment is easy to place. In addition, the working time of the detection equipment can be prolonged, and the problems of power supply and long-term working of the detection equipment are solved.

According to any of the foregoing embodiments of the first aspect of the present application, the acquisition and storage module includes a first power input terminal and a first power output terminal, and the power input terminal of the detection device includes the first power input terminal; the detection device further comprises a first isolation unit, wherein the first isolation unit is connected between the first power input end and the power output end of the converter; the first power output end is electrically connected with the interface adapting circuit.

Therefore, the electric energy provided by the converter is sequentially transmitted to the acquisition and storage module and the interface adaptation circuit, and the acquisition and storage module and the interface adaptation circuit are powered.

According to any of the foregoing embodiments of the first aspect of the present application, the acquisition and storage module includes a control unit and a storage unit, where the control unit is communicatively connected to the converter, and the control unit is configured to receive a fault trigger signal sent by the converter, and store, in response to the fault trigger signal, sampling data after conversion of the detection signal to the storage unit.

Therefore, the fault trigger signal of the converter is used as a trigger signal to trigger the storage operation, and the sampling data of the detection signal when faults occur can be recorded in time.

According to any one of the foregoing embodiments of the first aspect of the present application, the acquisition and storage module further includes a fault trigger signal input end, where the fault trigger signal input end receives a fault trigger signal sent by the fault trigger signal output end of the current transformer; the detection device further comprises a second isolation unit, and the second isolation unit is connected between the fault trigger signal output end and the fault trigger signal input end.

In this way, the second isolation unit may act as an isolation, thereby reducing the interaction between the detection device and the current transformer.

According to any of the foregoing embodiments of the first aspect of the present application, the acquisition and storage module further includes a wireless communication unit, the wireless communication unit being electrically connected to the control unit, the wireless communication unit being configured to send the detection signal and/or the sampling data to the target device; the acquisition and storage module further comprises an analog-to-digital conversion unit, and the analog-to-digital conversion unit is electrically connected between the interface adaptation circuit and the control unit.

In this manner, the wireless communication unit may transmit the detection signal and/or the sampled data to the target device for viewing by a user of the target device. In addition, the setting of display screen can also be reduced to further reduce the weight and the volume of check out test set, portable more.

According to any one of the foregoing embodiments of the first aspect of the present application, the split cable includes a first connection end, a second connection end, and a third connection end, where the second connection end and the third connection end are electrically connected to the first connection end; the first connecting end and the second connecting end are electrically connected with the converter, and the third connecting end is electrically connected with the first connecting interface.

The detection equipment of the wind generating set comprises a first connection interface, an interface adaptation circuit and a collection storage module, wherein the first connection interface is used for being electrically connected with a converter in the wind generating set through a branching cable, and the collection storage module is electrically connected with the first connection interface through the interface adaptation circuit and is used for receiving detection signals of the converter. The check out test set of this application embodiment is provided with first connecting interface, and first connecting interface is used for being connected through separated time cable and converter electricity, gathers the detected signal of converter through first connecting interface and separated time cable, need not to touch and measuring point through the table pen and can realize signal acquisition to solve the problem that check out test set is difficult for carrying out fault detection to the converter, be convenient for carry out fault detection to the converter.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described, and it is possible for a person skilled in the art to obtain other drawings according to these drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a detection device according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a cable according to an embodiment of the present application;

fig. 3 is a schematic circuit diagram of a first interface adapting circuit according to an embodiment of the present application;

FIG. 4 is a schematic circuit diagram of a second interface adapter circuit according to an embodiment of the present application;

FIG. 5 is another schematic circuit diagram of a detection device according to an embodiment of the present application;

fig. 6 is a schematic circuit diagram of an acquisition memory module according to an embodiment of the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application are described in detail below to make the objects, technical solutions and advantages of the present application more apparent, and to further describe the present application in conjunction with the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative of the application and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by showing examples of the present application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, this application is intended to cover such modifications and variations of this application as fall within the scope of the appended claims (the claims) and their equivalents. The embodiments provided in the examples of the present application may be combined with each other without contradiction.

Before describing the technical solution provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application first specifically describes the problems existing in the related art:

the use of detection devices such as oscilloscopes is very widespread. For example, in the wind power technology field, the detection device may detect a fault time related signal of a key component (such as a converter) in the wind generating set, so as to determine a cause of the fault.

However, according to the research of the inventor of the application, the detection device usually measures signals through a stylus at present, and measurement points at some positions in the current transformer are not easy to touch through the stylus, so that the detection device is difficult to detect faults of the current transformer, and meanwhile, due to the problem of grounding of the detection device, the current transformer is not easy to use due to safety consideration when the current transformer is operated.

In view of the above research of the inventor, the embodiment of the application provides a detection device and a detection device of a wind generating set, which can solve the technical problem that the detection device in the related technology is difficult to detect the fault moment related signal of the converter.

The technical conception of the embodiment of the application is as follows: the detection equipment is provided with a first connection interface, and the first connection interface is used for being electrically connected with the converter through a branching cable. Therefore, detection signals of the current transformer are collected through the first connection interface and the branching cable, so that signal collection can be realized without the need of touching and measuring points through a meter pen, and the problem that detection equipment is not easy to detect related signals of the current transformer at fault moment is solved.

The detection apparatus provided in the embodiments of the present application will be described first.

Fig. 1 is a schematic structural diagram of a detection device according to an embodiment of the present application. As shown in fig. 1, a detection device 10 of a wind generating set provided in an embodiment of the present application may include a first connection interface 101, an interface adaptation circuit 102, and an acquisition storage module 103. The first connection interface 101 can be used for electrical connection to the converter 20 in the wind power plant via a distribution cable F. Illustratively, the drop cable F includes, but is not limited to, a Dsub interface drop cable or a green terminal. The Dsub interface split cable includes, but is not limited to, a Dsub 25 needle split cable or a Dsub 15 needle split cable. Green terminals include, but are not limited to, 20Pin double row terminals. In the embodiment of the present application, the branching cable F may replace a stylus pen, and be used for collecting the detection signal of the current transformer 20.

The acquisition and storage module 103 may be electrically connected to the first connection interface 101 through the interface adaptation circuit 102, and the acquisition and storage module 103 may be configured to receive the detection signal of the current transformer 20. For example, the acquisition and storage module 103 may be configured to record the waveform of the detection signal and/or to transmit the detection signal of the current transformer 20 to the target device.

The utility model provides a wind generating set's check out test set is provided with first connection interface, and first connection interface is used for being connected through separated time cable and converter electricity, gathers the detected signal of converter through first connection interface and separated time cable, need not to touch and measuring point can realize signal acquisition through the table pen to solve check out test set and be difficult for carrying out fault detection's problem to the converter, be convenient for carry out fault detection to the converter.

Fig. 2 is a schematic structural diagram of a cable according to an embodiment of the present application. As shown in fig. 2, the drop cable F may optionally include a first connection end 21, a second connection end 22, and a third connection end 23, according to some embodiments of the present application. The second connection terminal 22 and the third connection terminal 23 may be electrically connected to the first connection terminal 21. For example, the second connection terminal 22 may be electrically connected to the first connection terminal 21 through the first connection trace f1, and the third connection terminal 23 may be electrically connected to the first connection terminal 21 through the second connection trace f 2. It is readily understood that each of the first and second connection tracks f1 and f2 may include a plurality of tracks to be electrically connected with a plurality of pins in the second or third connection terminal 22 or 23.

As shown in fig. 1 and 2, the first connection terminal 21 and the second connection terminal 22 may be electrically connected to the current transformer 20, and the third connection terminal 23 may be electrically connected to the first connection interface 101 in the detection device 10. For example, the first connection terminal 21 may be connected to one end of the current transformer 20, and the second connection terminal 22 may be connected to the other end of the current transformer 20, thereby electrically connecting one end of the current transformer 20 to the other end of the current transformer 20. Furthermore, it is electrically connectable with the first connection interface 101 in the detection device 10 via the second connection trace f2 and the third connection terminal 23. The detection signal of the current transformer 20 can be transmitted to the detection device 10 through the first connection end 21, the second connection wire f2, the third connection end 23 and the first connection interface 101 in sequence, so as to realize signal acquisition.

Therefore, the detection equipment is electrically connected with the converter through the wire-dividing cable, the detection signals of the converter are collected through the wire-dividing cable, and the signal collection can be realized without the need of touching and measuring points through a meter pen, so that the problem that the detection equipment is difficult to carry out fault detection on the converter is solved, and the detection of relevant signals at fault moment on the converter is facilitated.

According to some embodiments of the present application, the detection device may optionally enable acquisition of analog signals. In particular, the detection signal may comprise an analog signal.

Fig. 3 is a circuit schematic diagram of the first interface adapting circuit according to the embodiment of the present application. As shown in fig. 3, the interface adaptation circuit 102 may optionally comprise a first interface adaptation circuit 301, which first interface adaptation circuit 301 may also be referred to as analog interface adaptation circuit, mainly for acquisition of analog quantity signals and channel adaptation, according to some embodiments of the present application.

With continued reference to fig. 3, the first interface adaptation circuit 301 may include a first analog switch 3011 and a first signal conditioning circuit 3012. The first analog switch 3011 is electrically connected to the first connection interface 101, and the first analog switch 3011 is configured to receive analog signals of m 1-channel converters input by the first connection interface 101, where m1 is a positive integer. The specific number of m1 can be flexibly adjusted according to practical situations, and the embodiment of the application is not limited to this. For example, in some examples, m1 may be 4, i.e., acquisition of a 4-channel analog signal may be achieved. The first analog switch 3011, i.e., the analog switch, mainly performs a signal switching function in the signal link. The analog switch generally adopts a switching mode of a MOS tube to realize the turn-off or turn-on of a signal link. Since its function is similar to a switch and is implemented by the characteristics of an analog device, it is called an analog switch.

In the embodiment of the present application, the first analog switch 3011 mainly plays a role of channel selection or channel switching, that is, at least part of channels in m1 channels may be selected to be on or at least part of channels may be selected to be off at a certain moment.

The first signal conditioning circuit 3012 may be electrically connected to the first analog switch 3011 and the acquisition memory module 103, respectively, and the first signal conditioning circuit 3012 may be configured to transmit m 1-channel analog signals to the acquisition memory module 103. In some specific examples, the first signal conditioning circuit 3012 may be configured to adjust its own impedance, e.g., raise its own impedance to a preset threshold, to achieve a high impedance input. In this way, on the one hand, by increasing the impedance of the first signal conditioning circuit 3012, the voltage division and/or the current division of the first signal conditioning circuit 3012 on the detection signal can be reduced, so that the detection signal can be better transmitted to the acquisition and storage module 103, and the measurement accuracy of the detection signal is improved. On the other hand, the influence on the converter caused by the addition of the detection equipment can be reduced by increasing the input impedance of the detection equipment, and the normal operation of the converter is ensured.

With continued reference to fig. 3, the first interface adaptation circuit 301 may optionally further comprise a first self-test circuit 3013, according to some embodiments of the present application. The first self-checking circuit 3013 may be electrically connected to the acquisition memory module 103 and the first analog switch 3011, respectively, and the first self-checking circuit 3013 is configured to receive the first self-checking signal provided by the acquisition memory module 103 and transmit the first self-checking signal back to the acquisition memory module 103 through the first analog switch 3011 and the first signal conditioning circuit 3012.

For example, the first self-checking circuit 3013 may receive the first self-checking signal of the first voltage value provided by the acquisition and storage module 103, and transmit the first self-checking signal of the first voltage value to the first analog switch 3011. The first analog switch 3011 transmits the first self-test signal to the first signal conditioning circuit 3012, and the first signal conditioning circuit 3012 transmits the first self-test signal to the acquisition and storage module 103. In theory, in the case that neither the first analog switch 3011 nor the first signal conditioning circuit 3012 fails, the voltage value of the first self-checking signal sent by the acquisition and storage module 103 and the voltage value of the received first self-checking signal should be the same or similar. Therefore, the collection and storage module 103 can implement the self-test of the first interface adapter circuit by comparing the voltage value of the received first self-test signal with the first voltage value, i.e. detect whether the first interface adapter circuit fails. For example, when the difference between the voltage value of the first self-checking signal received by the acquisition and storage module 103 and the first voltage value is greater than the preset error threshold, it may be determined that the first interface adapting circuit fails.

It should be noted that, the specific size of the first voltage value may be flexibly adjusted according to the actual situation, which is not limited in the embodiment of the present application. For example, in some examples, the first voltage value may be 5V.

According to some embodiments of the present application, the detection device may optionally also enable acquisition of digital quantity signals, so that for example monitoring of PWM and fault signals, and monitoring of local DI/DO signals may be satisfied. In particular, the detection signal may comprise a digital quantity signal.

Fig. 4 is a schematic circuit diagram of a second interface adapting circuit according to an embodiment of the present application. As shown in fig. 4, the interface adaptation circuit 102 may optionally comprise a second interface adaptation circuit 401, according to some embodiments of the present application. The second interface adaptation circuit 401 may also be referred to as a digital interface adaptation circuit, mainly for acquisition and channel adaptation of digital quantity signals.

With continued reference to fig. 4, the second interface adaptation circuit 401 may include a voltage adjustment circuit 4011, a decoder 4012, a second analog switch 4013, and a second signal conditioning circuit 4014. The voltage adjustment circuit 4011 may be electrically connected to the first connection interface 101, and the voltage adjustment circuit 4011 is configured to receive the digital quantity signals of the m2 channels of the converter input by the first connection interface 101, and adjust the voltage values of the digital quantity signals of the m2 channels to be within a preset voltage range. Wherein m2 is a positive integer, and the specific number of m2 can be flexibly adjusted according to practical situations, which is not limited in the embodiment of the present application. For example, in some examples, m2 may be 28, i.e., acquisition of 28-channel digital quantity signals may be achieved.

The voltage value of the digital quantity signal input by the first connection interface 101 is generally higher than the normal operating voltage (i.e., the maximum input voltage) of the second interface adaptation circuit 401 and/or the acquisition and storage module 103. For example, the voltage value of the digital quantity signal input by the first connection interface 101 is 24V, and the normal operation voltage of the second interface adaptation circuit 401 and/or the acquisition and storage module 103 is within a voltage range of ±10v. Therefore, the voltage value of the digital quantity signal input from the first connection interface 101 needs to be adjusted within the preset voltage range by the voltage adjustment circuit 4011.

In addition, similar to the first signal conditioning circuit 3012, the voltage adjustment circuit 4011 can also be used to adjust its own impedance, such as to raise its own impedance to a preset threshold, to achieve a high impedance input. In this way, on the one hand, by increasing the impedance of the voltage adjusting circuit 4011, the voltage dividing and/or splitting of the voltage adjusting circuit 4011 on the detection signal can be reduced, so that the detection signal can be better transmitted to the acquisition and storage module 103, and the measurement accuracy of the detection signal is improved. On the other hand, the influence on the converter caused by the addition of the detection equipment can be reduced by increasing the input impedance of the detection equipment, and the normal operation of the converter is ensured.

With continued reference to fig. 4, a decoder 4012 may be electrically coupled to the acquisition memory module 103, and the decoder 4012 may be configured to convert the first control signal sent by the acquisition memory module 103 to a second control signal. Since the number of bits of the first control signal sent by the acquisition and storage module 103 is small, the decoder 4012 can convert the first control signal with the small number of bits into the second control signal with the large number of bits, so as to control on/off of the second analog switch 4013 with the large number of bits. For example, in some examples, the decoder 4012 may be a 38 decoder, and the 38 decoder may convert the first control signal of 3 bits sent by the acquisition storage module 103 into the second control signal of 8 bits. And the signal of each number of bits can control on/off of a set of second analog switches 4013.

The second analog switch 4013 may be electrically connected to the voltage adjustment circuit 4011 and the decoder 4012, respectively, and the second analog switch 4013 may be configured to convert the adjusted m 2-channel digital quantity signals into n-channel digital quantity signals in response to a second control signal provided by the decoder 4012. Wherein m2 > n and n is a positive integer.

The number of acquisition channels of the control unit in the acquisition memory module 103 is limited, e.g. the control unit in the acquisition memory module 103 has only 4 acquisition channels, and these 4 acquisition channels theoretically can only acquire digital quantity signals of 4 channels. In the embodiment of the present application, the decoder 4012 and the second analog switch 4013 cooperate to realize the expansion of the digital quantity channels, for example, 4 digital quantity channels are expanded into 28 digital quantity channels, that is, digital quantity signals of 28 channels are collected.

For example, in some specific examples, 7 sets of second analog switches 4013 may be used, each set of second analog switches 4013 receives digital quantity signals of 4 channels, and an output mode of "one-out-of-four" is adopted, and digital quantity signals of 1 channel may be selected at any time to output, so as to realize that the acquisition and storage module 103 can acquire digital quantity signals of 28 channels. The decoder 4012 may output a second control signal of 8 bits, of which 7 bits may control on/off of the 7 sets of second analog switches 4013, respectively.

With continued reference to fig. 4, a second signal conditioning circuit 4014 may be electrically connected to the second analog switch 4013 and the acquisition memory module 103, respectively, and the second signal conditioning circuit 4014 may be configured to transmit the n channels of digital quantity signals to the acquisition memory module 103. Similar to the first signal conditioning circuit 3012, in some specific examples, the second signal conditioning circuit 4014 can be used to adjust its own impedance, such as to raise its own impedance to a preset threshold, to achieve a high impedance input. In this way, on the one hand, by increasing the impedance of the second signal conditioning circuit 4014, the voltage division and/or the current division of the detection signal by the second signal conditioning circuit 4014 can be reduced, so that the detection signal can be better transmitted to the acquisition and storage module 103, and the measurement accuracy of the detection signal is improved. On the other hand, the influence on the converter caused by the addition of the detection equipment can be reduced by increasing the input impedance of the detection equipment, and the normal operation of the converter is ensured.

With continued reference to fig. 4, the second interface adaptation circuit 401 may optionally further comprise a second self-test circuit 4015, according to some embodiments of the present application. The second self-checking circuit 4015 may be electrically connected to the acquisition memory module 103 and the second analog switch 4013, respectively, and the second self-checking circuit 4015 is configured to receive the second self-checking signal provided by the acquisition memory module 103 and transmit the second self-checking signal back to the acquisition memory module 103 through the second analog switch 4013 and the second signal conditioning circuit 4014.

For example, the second self-checking circuit 4015 may receive the second self-checking signal of the second voltage value provided by the acquisition and storage module 103, and transmit the second self-checking signal of the second voltage value to the second analog switch 4013. The second analog switch 4013 transmits the second self-test signal to the second signal conditioning circuit 4014, and the second signal conditioning circuit 4014 transmits the second self-test signal to the acquisition memory module 103. In theory, in the case that no failure occurs in the second interface adapting circuit 401, the voltage value of the second self-checking signal sent by the acquisition and storage module 103 and the voltage value of the received second self-checking signal should be the same or similar. Therefore, the collection and storage module 103 can implement the self-test of the second interface adapter circuit by comparing the voltage value of the received second self-test signal with the second voltage value, i.e. detect whether the second interface adapter circuit fails. For example, when the difference between the voltage value of the second self-checking signal received by the acquisition and storage module 103 and the second voltage value is greater than the preset error threshold, it may be determined that the second interface adapting circuit fails.

It should be noted that, the specific size of the second voltage value may be flexibly adjusted according to the actual situation, which is not limited in the embodiment of the present application. For example, in some examples, the second voltage value may be 5V.

The acquisition range of the digital quantity signal of the detection equipment can be flexibly adjusted according to actual conditions. In some embodiments, alternatively, the acquisition range of the digital quantity signal of the detection device may be designed to be 100V.

Further researches of the inventor of the application find that the current detection equipment is usually powered by a lithium battery or 220V alternating current, on one hand, the detection equipment has larger volume and heavier weight, and for field monitoring, the detection equipment is inconvenient to place especially under the condition of smaller space inside the converter; on the other hand, the power supply is not easy to find or the continuous working time of the detection equipment is short.

Therefore, the application considers that the detection device is powered by the converter, so that a lithium battery or a transformer (220 VAC power supply) in the detection device is omitted, the volume and the weight of the detection device are greatly reduced, and the field device is easy to place. In addition, the working time of the detection equipment can be prolonged, and the problems of power supply and long-term working of the detection equipment are solved.

In particular, according to some embodiments of the present application, optionally, a power input of the detection device may be used for electrical connection with a power output of the current transformer.

Therefore, the detection equipment can be powered by the electric energy provided by the power output end of the converter, so that a lithium battery or a transformer in the detection equipment is omitted, the volume and the weight of the detection equipment are greatly reduced, and the field equipment is easy to place. In addition, the working time of the detection equipment can be prolonged, and the problems of power supply and long-term working of the detection equipment are solved.

In some specific examples, the power output of the converter may be a 24V power output interface. The power input end of the detection equipment can be electrically connected with a 24V power output interface of the converter, so that 24V power supply is realized.

Fig. 5 is another circuit schematic diagram of the detection device according to the embodiment of the present application. As shown in fig. 5, the acquisition memory module 103 may optionally include a first power input 51 and a first power output 52, according to some embodiments of the present application. The power input of the detection device may comprise a first power input 51.

The detection device may further comprise a first isolation unit 53, the first isolation unit 53 being connectable between the first power input 51 and the power output of the current transformer 20. The first isolation unit 53 may act as an isolation to reduce interactions between the detection device and the current transformer. Illustratively, the first isolation unit 53 includes, but is not limited to, a DC/DC isolation switch.

The first power supply output 52 may be electrically connected to the interface adaptation circuit 102 to supply power to the electronics in the interface adaptation circuit 102.

In this way, the electric energy provided by the converter is sequentially transmitted to the acquisition and storage module 103 and the interface adaptation circuit 102, so as to supply power for the acquisition and storage module 103 and the interface adaptation circuit 102.

Further researches of the inventor of the application find that the current detection equipment has higher sampling frequency and shorter waveform storage time, and cannot be linked with a fault trigger signal of the converter, so that the waveform at the fault moment is not beneficial to recording.

In view of this, the present application contemplates triggering the storage operation with the fault trigger signal of the current transformer as the trigger signal, so as to record the waveform when the fault occurs in time.

Fig. 6 is a schematic circuit diagram of an acquisition memory module according to an embodiment of the present application. As shown in fig. 6, the acquisition memory module 103 may optionally include a control unit 601 and a memory unit 602, according to some embodiments of the present application. The control unit 601 may be communicatively connected to the converter 20, where the control unit 601 is configured to receive a fault trigger signal sent by the converter 20, and store sample data after conversion of the detection signal to the storage unit 602 in response to the fault trigger signal.

Specifically, when receiving the fault trigger signal sent by the converter 20, the control unit 601 may convert the detection signal into sampling data in response to the fault trigger signal, and store the sampling data in the storage unit 602. The sampling data includes, but is not limited to, waveforms of detection signals, voltage values at a plurality of moments, current values at a plurality of moments, and the like.

Therefore, the fault trigger signal of the converter is used as a trigger signal to trigger the storage operation, and the sampling data of the detection signal when faults occur can be recorded in time.

With continued reference to fig. 6, in accordance with some embodiments of the present application, the acquisition memory module 103 optionally further includes a failsafe signal input 6011, and the failsafe signal input 6011 may be located within the control unit 601. The failsafe signal input 6011 may receive the failsafe signal from the failsafe signal output 201 of the current transformer 20.

The detection device may further include a second isolation unit 603, and the second isolation unit 603 may be connected between the fail-over signal output terminal 201 and the fail-over signal input terminal 6011. The second isolation unit 603 may act as an isolation to reduce interactions between the detection device and the current transformer. Illustratively, the second isolation unit 603 includes, but is not limited to, a DC/DC isolation switch.

With continued reference to fig. 6, the acquisition and storage module 103 may optionally further include a wireless communication unit 604, according to some embodiments of the present application. The wireless communication unit 604 may be electrically connected to the control unit 601, where the wireless communication unit 604 is configured to send the detection signal and/or the sample data to the target device for a user of the target device to view the detection signal and/or the sample data. The target device includes, but is not limited to, an electronic device such as a computer or a mobile phone used by a target user.

In some examples, wireless communication unit 604 includes, but is not limited to, a WIFI communication device or a bluetooth communication device, among others.

In some embodiments, the detection signal and/or the sampling data may be sent to the target device through the wireless communication unit 604, and the detection signal and/or the sampling data is displayed by the target device, so that the detection device may not need to be additionally provided with a display screen, thereby further reducing the weight and the volume of the detection device, and being more portable.

With continued reference to fig. 6, according to some embodiments of the present application, the acquisition memory module 103 may optionally further include an Analog-to-Digital Converter (ADC) 605, and the ADC 605 may be electrically connected between the interface adaptation circuit 102 and the control unit 601, to enable conversion of Analog and digital signals between the interface adaptation circuit 102 and the control unit 601. In the storing, the control unit 601 may specifically store the data of the detection signal converted by the analog-to-digital conversion unit 605 into the storage unit 602. In some examples, analog-to-digital conversion unit 605 may employ a high-speed ADC to facilitate acquisition of signal details.

Based on the detection device 10 of the wind generating set provided in the embodiment, correspondingly, the embodiment of the application also provides a detection system of the wind generating set. Please refer to the following examples.

The detection system of the wind generating set provided in the embodiment of the present application may include the detection device 10 of the wind generating set provided in the above embodiment. The first connection interface of the detection device 10 of the wind power plant can be electrically connected to a converter in the wind power plant via a distribution cable.

It should be understood that, in the present specification, each embodiment is described in an incremental manner, and the same or similar parts between the embodiments are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. For an embodiment of a detection system for a wind power plant, reference may be made to the description of an embodiment of a detection device. The present application is not limited to the specific constructions described above and shown in the drawings. Various changes, modifications and additions may be made by those skilled in the art after appreciating the spirit of the present application. Also, a detailed description of known techniques is omitted herein for the sake of brevity.

Those skilled in the art will appreciate that the above-described embodiments are exemplary and not limiting. The different technical features presented in the different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in view of the drawings, the description, and the claims. In the claims, the term "comprising" does not exclude other means or steps; the word "a" does not exclude a plurality; the terms "first," "second," and the like, are used for designating a name and not for indicating any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The functions of the various elements presented in the claims may be implemented by means of a single hardware or software module. The presence of certain features in different dependent claims does not imply that these features cannot be combined to advantage.

Claims (10)

1. The utility model provides a wind generating set's check out test set, its characterized in that, check out test set includes first connection interface, interface adaptation circuit and gathers storage module, wherein:

the first connection interface is used for being electrically connected with a converter in the wind generating set through a branching cable;

the acquisition and storage module is electrically connected with the first connection interface through the interface adaptation circuit and is used for receiving detection signals of the converter.

2. The wind power plant detection apparatus of claim 1, wherein the detection signal comprises an analog signal;

the interface adaptation circuit comprises a first interface adaptation circuit comprising:

the first analog switch is electrically connected with the first connection interface and is configured to receive analog quantity signals of the converter of m1 channels input by the first connection interface, and m1 is a positive integer;

the first signal conditioning circuit is electrically connected with the first analog switch and the acquisition and storage module respectively and is configured to transmit the analog quantity signals of the m1 channels to the acquisition and storage module; the method comprises the steps of,

the first self-checking circuit is electrically connected with the acquisition storage module and the first analog switch respectively and is configured to receive a first self-checking signal provided by the acquisition storage module and transmit the first self-checking signal back to the acquisition storage module through the first analog switch and the first signal conditioning circuit.

3. A wind power plant detection apparatus according to claim 1 or 2, wherein the detection signal comprises a digital quantity signal;

the interface adaptation circuit further comprises a second interface adaptation circuit comprising:

the voltage adjusting circuit is electrically connected with the first connecting interface, and is configured to receive digital quantity signals of the converters of m2 channels input by the first connecting interface, and adjust the voltage values of the digital quantity signals of the m2 channels to be within a preset voltage range, wherein m2 is a positive integer;

the decoder is electrically connected with the acquisition and storage module and is used for converting the first control signal sent by the acquisition and storage module into a second control signal;

a second analog switch electrically connected to the voltage adjustment circuit and the decoder, respectively, and configured to convert the adjusted digital quantity signals of the m2 channels into digital quantity signals of n channels in response to the second control signal provided by the decoder, m2 > n and n is a positive integer; the method comprises the steps of,

and the second signal conditioning circuit is respectively and electrically connected with the second analog switch and the acquisition and storage module and is configured to transmit the digital quantity signals of the n channels to the acquisition and storage module.

4. A wind power unit detection apparatus according to claim 3, wherein the second interface adaptation circuit further comprises:

the second self-checking circuit is electrically connected with the acquisition storage module and the second analog switch respectively and is configured to receive a second self-checking signal provided by the acquisition storage module and transmit the second self-checking signal back to the acquisition storage module through the second analog switch and the second signal conditioning circuit.

5. The wind turbine generator system of claim 1, wherein a power input of the detection device is configured to be electrically connected to a power output of the converter.

6. The wind turbine generator system of claim 5, wherein the collection and storage module comprises a first power input and a first power output, the power input of the detection device comprising the first power input;

the detection equipment further comprises a first isolation unit, wherein the first isolation unit is connected between the first power input end and the power output end of the converter;

the first power supply output end is electrically connected with the interface adapting circuit.

7. The wind turbine generator system of claim 1, wherein the collection and storage module comprises a control unit and a storage unit; the control unit is in communication connection with the converter; the control unit is configured to receive a fault trigger signal sent by the converter, and store the sampling data converted by the detection signal to the storage unit in response to the fault trigger signal.

8. The wind turbine generator system of claim 7, wherein the collection and storage module further comprises a fault trigger signal input end, the fault trigger signal input end receiving the fault trigger signal sent by the fault trigger signal output end of the converter;

the detection device further comprises a second isolation unit, and the second isolation unit is connected between the fault trigger signal output end and the fault trigger signal input end.

9. The wind turbine generator system of claim 7, wherein the collection and storage module further comprises a wireless communication unit electrically connected to the control unit, the wireless communication unit configured to transmit the detection signal and/or the sampling data to a target device;

the acquisition and storage module further comprises an analog-to-digital conversion unit, and the analog-to-digital conversion unit is electrically connected between the interface adaptation circuit and the control unit.

10. The wind turbine generator system of claim 1, wherein the distribution cable includes a first connection end, a second connection end, and a third connection end, each of the second connection end and the third connection end being electrically connected to the first connection end;

the first connecting end and the second connecting end are electrically connected with the converter, and the third connecting end is electrically connected with the first connecting interface.

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