CN211296297U - Backup power supply system and device of wind generating set - Google Patents

Abstract

The embodiment of the application discloses wind generating set's stand-by power supply system and device relates to the wind power generation field. The standby power supply system comprises a plurality of super capacitor modules and super capacitor chargers, wherein the super capacitor modules are arranged in each shafting in a hub; the super capacitor module comprises a super capacitor, and the super capacitor is used for supplying power to a variable pitch system of the wind generating set under the condition of power grid outage; and the super capacitor chargers of each shafting are used for charging the super capacitor modules of each shafting. The technical scheme of the embodiment of the application can reduce the maintenance cost of the wind generating set.

Description

Backup power supply system and device of wind generating set

Technical Field

The application belongs to the field of wind power generation, and particularly relates to a standby power supply system and device of a wind generating set.

Background

The standby power supply of the wind generating set is used for providing power for the variable pitch system under the condition of power failure of a power grid.

At present, a lead-acid storage battery is used as a standby power supply. However, the lead-acid storage battery is greatly influenced by the environmental temperature, and the service life of the lead-acid storage battery is reduced or even loses efficacy due to high temperature in summer and low temperature in winter, so that the standby power supply needs to be replaced more frequently, and the maintenance cost of the wind generating set is increased.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a wind generating set's stand-by power supply system and device, can reduce wind generating set's maintenance cost.

In a first aspect, an embodiment of the present application provides a backup power system for a wind turbine generator system, including a plurality of super capacitor modules and super capacitor chargers arranged in each shafting of a hub, where the super capacitor modules on each shafting are connected in series;

the super capacitor module comprises a super capacitor, and the super capacitor is used for supplying power to a variable pitch system of the wind generating set under the condition of power grid outage;

and the super capacitor chargers of each shafting are used for charging the super capacitor modules of each shafting.

In some possible embodiments, the super capacitor module further comprises a fault detection circuit, and detection signal contacts of the fault detection circuits of the super capacitor modules are connected in series;

the fault detection circuit comprises an over-temperature detection circuit and/or an overvoltage detection circuit.

In some possible embodiments, after the detection signal contacts of the fault detection circuits of a plurality of super capacitor modules are connected in series, a detection signal path is formed with the detection signal contacts of the super capacitor charger,

the output end of the detection signal path is connected with a power supply normal signal end of a driving control cabinet of the variable pitch system;

and in the case that the detection signal path is broken, the state signal of the normal signal end of the power supply is reset.

In some possible embodiments, the detection signal path further comprises a fuse detection contact in series with the detection signal contact of the supercapacitor charger.

In some possible embodiments, the fault detection circuit includes an over-temperature detection circuit,

the over-temperature detection circuit comprises a normally open temperature control switch, an over-temperature detection signal contact and an over-temperature detection coil, the over-temperature detection coil is connected with the temperature control switch in parallel, and the over-temperature detection signal contact is connected in series in a detection signal passage;

when the temperature of the super capacitor module does not exceed the normal temperature threshold range, the temperature control switch is normally opened, the over-temperature detection coil is electrified, and the over-temperature detection signal contact is closed;

when the temperature of the super capacitor module exceeds the normal temperature threshold range, the temperature control switch is closed, the over-temperature detection coil loses power, and the over-temperature detection signal contact is disconnected.

In some possible embodiments, the fault detection circuit comprises an over-voltage detection circuit,

the overvoltage detection circuit comprises an overvoltage detection sensor, an overvoltage detection signal contact and an overvoltage detection coil; the overvoltage detection coil is connected with the overvoltage detection sensor in parallel, and the overvoltage detection signal contact is connected in series in the detection signal path;

when the voltage of the super capacitor module does not exceed the normal voltage threshold, the overvoltage detection sensor is not conducted, the overvoltage detection coil is electrified, and the overvoltage detection signal contact is closed;

when the voltage of the super capacitor module exceeds the normal voltage threshold value, the overvoltage detection sensor is switched on, the overvoltage detection coil loses power, and the overvoltage detection signal contact is disconnected.

In a second aspect, an embodiment of the present application provides a backup power device for a wind turbine generator system, including a cabinet and a backup power system for the wind turbine generator system in the technical solution of the first aspect, wherein a super capacitor module and a super capacitor charger in the backup power system are disposed in the cabinet;

the cabinet body comprises a first sub-cabinet body and a second sub-cabinet body which are buckled;

the first sub-cabinet body is used for installing a super capacitor module or installing the super capacitor module and a super capacitor charger;

the second sub-cabinet body is used for installing wiring and a circuit breaker.

In some possible embodiments, a heat dissipation window is disposed on the first sub-cabinet.

In some possible embodiments, the cabinet further comprises a fixing structure for connecting the first sub-cabinet and the second sub-cabinet.

In some possible embodiments, a fixing component is arranged inside the first sub-cabinet body,

the fixing component comprises a fixing groove and a fixing piece which is arranged in the fixing groove and can slide along the fixing groove;

the super capacitor module or the super capacitor charger can be fixed in the first sub-cabinet body through the fixing piece.

The embodiment of the application provides a wind generating set's stand-by power supply system and device, wind generating set's stand-by power supply system is including setting up a plurality of super capacitor module and super capacitor charger of each shafting in wheel hub. And the super capacitor in the super capacitor module supplies power to a pitch system of the wind generating set when the power grid is powered off. And the super capacitor chargers of each shafting charge the super capacitor modules of each shafting. The super capacitor has the advantages of wide working temperature range, short charging time, low failure rate and long service life, and a standby power supply does not need to be frequently replaced, so that the maintenance cost of the wind generating set is reduced.

Drawings

The present application may be better understood from the following description of specific embodiments of the application taken in conjunction with the accompanying drawings, in which like or similar reference numerals identify like or similar features.

Fig. 1 is an electrical topology diagram of a backup power system of a wind turbine generator system according to an embodiment of the present disclosure;

fig. 2 is an electrical topology diagram of a backup power system of a three-blade wind turbine generator system according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a detection signal path according to an embodiment of the present disclosure;

fig. 4 is a schematic external connection diagram of a super capacitor charger according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of an over-temperature detection circuit according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of an overvoltage detection circuit according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a cabinet provided in an embodiment of the present application;

fig. 8 is a schematic separated structure diagram of a cabinet provided in the embodiment of the present application;

fig. 9 is a schematic view of a cabinet provided in accordance with another embodiment of the present application;

fig. 10 is a schematic structural diagram of a fixing assembly in a first sub-cabinet provided in an embodiment of the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, 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 illustrating examples thereof. The present application is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the present application. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present application.

The embodiment of the application provides a wind generating set's stand-by power supply system and device, can be under the circumstances of the electric wire netting outage, provide the power for wind generating set's the oar system that becomes. In the embodiment of the application, the super capacitor module is used as a standby power supply. The super capacitor module comprises a super capacitor. The working temperature range of the super capacitor is wider, the charging time is shorter, the failure rate is lower, the service life is longer, the replacement frequency of the standby power supply can be effectively reduced, and therefore the maintenance cost is improved. Moreover, the standby power system and the standby power device of the wind generating set in the embodiment of the application can be directly applied to the wind generating set designed corresponding to the lead-acid storage battery, and the standby power system using the super capacitor module as the standby power can be realized without changing the main body control logic of the wind generating set designed corresponding to the lead-acid storage battery. For example, the backup power system of the wind turbine generator system in the embodiment of the present application may be directly applied to a wind turbine generator system of wawter 1.5MW (i.e., megawatt).

The embodiment of the application provides a wind generating set's stand-by power supply system. Fig. 1 is an electrical topology diagram of a backup power system of a wind turbine generator system according to an embodiment of the present disclosure. As shown in fig. 1, the backup power system 10 may include a plurality of super capacitor modules 11 and a super capacitor charger 12. The super capacitor module comprises a super capacitor. The super capacitor is used for supplying power to a pitch system of the wind generating set under the condition of power grid outage. The super capacitor charger 12 is used for charging the super capacitor module 11.

And selecting an applicable super capacitor module in advance. The capacitance value of the super capacitor module which is enough to support safe blade collection of the wind generating set can be calculated according to the working voltage of the standby power supply system, the energy required by blade collection of the variable pitch system, the torque, the correction coefficient, the efficiency of a motor in the wind generating set, the efficiency of a driver and the like. For example, the operating voltage range of the backup power system can be set to 300V dc to 250V dc. The capacitance value of the super capacitor in the super capacitor module as the standby power supply can be calculated through equations (1) and (2):

E＝K×T×W×t/(9550×η₁×η₂) (2)

wherein C is the capacitance value of the super capacitor, E is the energy (unit is kilojoule) required by the pitch system to receive the propeller, and V is₁Is the discharge starting voltage, V, of the super capacitor module₂The discharge end voltage of the super capacitor module is shown, K is a correction coefficient, T is the torque at a certain moment, W is the rotating speed of the variable pitch motor, η₁For motor efficiency, η₂For driver efficiency, t is the length of time required to retract the propeller.

The super capacitor module and the super capacitor charger are arranged in each shafting in the hub. Specifically, one axis of the hub corresponds to one blade. Each axle can be installed with at least one super capacitor module and super capacitor charger. If each shafting is provided with a plurality of super capacitor modules, the super capacitor modules on each shafting are connected in series. And the super capacitor chargers of each shafting charge the super capacitor modules of each shafting. For example, the wind turbine generator set has three blades, and each blade corresponds to one shafting. Suppose that the three blades are respectively a blade a1, a blade a2 and a blade A3, the axis system corresponding to the blade a1 is a shaft system B1, the axis system corresponding to the blade a2 is a shaft system B2, and the axis system corresponding to the blade A3 is a shaft system B3. Correspondingly, at least one super capacitor module and a super capacitor charger are arranged on the shafting B1, at least one super capacitor module and a super capacitor charger are arranged on the shafting B2, and at least one super capacitor module and a super capacitor charger are arranged on the shafting B3. The super capacitor module and the super capacitor charger on one shafting are mutually independent from the super capacitor module and the super capacitor charger on the other shafting, so that the installation and the later maintenance are convenient. Fig. 2 is an electrical topology diagram of a backup power system of a three-blade wind turbine generator system according to an embodiment of the present disclosure. As shown in fig. 2, shafting B1, B2 and B3 respectively correspond to the super capacitor module 11 and the super capacitor charger 12.

In some examples, the super capacitor module and the super capacitor charger may be disposed in a space between the air guide sleeve and the hub of the wind turbine generator system, so as to facilitate the arrangement of the electrical connection line and avoid charging failure caused by the over-long electrical connection line. For example, in the related art, a charger for a lead-acid battery as a backup power source is provided in a cabin cabinet, an electrical connection line is long and needs to pass through a slip ring, and a charging failure is easily caused due to a contact problem between a slide and a carbon brush. By adopting the standby power supply system in the embodiment of the application, the charging fault caused by the slip ring fault can be avoided. And one super capacitor charger charges the super capacitor module on a shafting in a one-charge-one charging mode, so that the charging time of the super capacitor module can be effectively shortened, the heat productivity of the charger is reduced, and the stability of the standby power supply system is improved.

In the embodiment of the application, the standby power system of the wind generating set comprises a plurality of super capacitor modules and super capacitor chargers, wherein the super capacitor modules are arranged in all shafting in a hub. And the super capacitor in the super capacitor module supplies power to a pitch system of the wind generating set when the power grid is powered off. And the super capacitor chargers of each shafting charge the super capacitor modules of each shafting. The super capacitor has the advantages of wide working temperature range, short charging time, low failure rate and long service life, and a standby power supply does not need to be frequently replaced, so that the maintenance cost of the wind generating set is reduced.

In some examples, the supercapacitor module further comprises a fault detection circuit. Wherein, the detection signal contact of the fault detection circuit of a plurality of super capacitor modules is connected in series. Under the condition that each super capacitor module has no fault, the detection signal contact of the fault detection circuit of each super capacitor module is closed, so that the detection signal contacts of the fault detection circuits of the plurality of super capacitor modules are connected in series to form a passage to be conducted. And if at least one super capacitor module has a fault, disconnecting a line formed by connecting detection signal contacts of the fault detection circuits of the plurality of super capacitor modules in series.

The fault detection circuit comprises an over-temperature detection circuit and/or an overvoltage detection circuit. The over-temperature detection circuit is used for detecting whether the super capacitor module is over-temperature. The overvoltage detection circuit is used for detecting whether the super capacitor module is in overvoltage.

After the detection signal contacts of the fault detection circuits of the plurality of super capacitor modules are connected in series, a detection signal path is formed by the detection signal contacts of the super capacitor charger. The output end of the detection signal access is connected with a power supply normal signal end of a driving control cabinet of the variable pitch system.

In some examples, detecting the signal contact of the supercapacitor charger may include outputting a normal contact and charging a full contact. Under the condition that the super capacitor charger does not have a fault, the output normal contact of the super capacitor charger is closed; and when the super capacitor charger fails, the output normal contact of the super capacitor charger is disconnected. If the super capacitor charger detects that the voltage of the super capacitor module is within the full charge voltage range, closing a full charge contact of the super capacitor charger; and if the super capacitor charger detects that the voltage of the super capacitor module is out of the full charge voltage range, the charging full contact of the super capacitor charger is disconnected. For example, when the super capacitor charger detects that the voltage of the super capacitor module is higher than or equal to Va-5 volts, the charging full contact of the super capacitor charger is closed; and when the super capacitor charger detects that the voltage of the super capacitor module is lower than Va-10 volts, the charging full contact of the super capacitor charger is disconnected. Where Va is a rated full charge voltage.

In some examples, the detection signal path may further include a fuse detection contact in series with the detection signal contact of the supercapacitor charger. If the fuse fails, the fuse detects that the contact is disconnected; if the fuse is not faulty, the fuse detects that the contacts are closed.

Fig. 3 is a schematic diagram of a detection signal path according to an embodiment of the present disclosure. As shown in fig. 3, five super capacitor modules are provided, and each super capacitor module is provided with an over-temperature detection circuit and an over-voltage detection circuit. The detection signal path comprises over-temperature detection signal contacts KA 1-KA 5 and overvoltage detection signal contacts KB 1-KB 5 of the fault detection circuit of the five super capacitor modules connected in series, detection signal contacts KC1 and KC2 of the super capacitor charger and a fuse detection contact KD 1. Wherein KE1 is the power supply detection contact of drive control cabinet.

When the fault detection circuit does not detect a fault, the output of the super capacitor charger is normal, the super capacitor bank is not fully charged, and the fuse is not in fault, all detection contacts are closed, and the detection signal path is conducted. As shown in fig. 3, when the contacts KA1 to KA5 and KB1 to KB5, the contacts KC1 and KC2, and the contact KD1 are all closed, the detection signal path is conducted. Under the condition that the detection signal path is conducted, the state signal of the normal signal end (namely the Power _ OK signal end) of the Power supply represents that the state is normal. For example, if the status signal of the normal power signal terminal is 1, the status is normal.

If the fault detection circuit detects a fault, or the output of the super capacitor charger is abnormal, or the super capacitor bank is fully charged, or the fuse fails, at least one of the contacts is disconnected, and the fault detection signal path is disconnected. As shown in fig. 3, at least one of the contacts KA1 to KA5 and KB1 to KB5, KC1 and KC2, and KD1 is open, and the detection signal path is broken. And in the case that the detection signal path is broken, the state signal of the normal signal end of the power supply is reset. For example, the status signal of the normal power supply signal terminal is reset to 0.

Fig. 4 is a schematic external connection diagram of a super capacitor charger according to an embodiment of the present disclosure. As shown in fig. 4, contacts 2A and 2B on the supercapacitor charger are output normal contacts, and contacts 3A and 3B are fully charged contacts. When the fault detection circuit does not detect a fault and the output of the super capacitor charger is normal, the external control contacts 1A + and 1C-of the super capacitor charger are closed, the relay coil K1 is electrified, the state signal representation state of the normal signal end of the power supply is normal, and the super capacitor charger can work normally. When the fault detection circuit detects a fault and/or the output of the super capacitor charger is abnormal, the external control contacts 1A + and 1C-of the super capacitor charger are disconnected, the relay coil K1 loses power, the state signal of the normal signal end of the power supply is reset, and the super capacitor charger prohibits output. Under the condition that the super capacitor module has over-temperature or overvoltage faults or the super capacitor charger outputs abnormally, the super capacitor charger can be quickly turned off. It should be noted that if the fuse fails or the charging of the super capacitor charger is full, the contacts are opened, the external control contacts 1A + and 1C-of the super capacitor charger are closed, the relay coil K1 is powered, the super capacitor charger works normally, but the state signal of the normal signal end of the power supply is reset. Therefore, the opened contact can be judged and the reason for opening the contact can be determined according to the state signal of the normal signal end of the power supply and whether the relay coil is electrified.

Specifically, the Power normal signal terminal may be a Power _ OK signal terminal of the driving control cabinet. The normal signal end of the power supply can transmit the state signal to a controller of the wind generating set so as to inform the controller to detect whether each part corresponding to the contact in the signal path is in fault. The fault monitoring function and the alarm function can be realized on the basis of not changing the original control logic program of the wind generating set.

The over-temperature detection circuit and the over-voltage detection circuit in the super capacitor module are respectively described below.

The over-temperature detection circuit comprises a normally-open temperature control switch, an over-temperature detection signal contact and an over-temperature detection coil. Wherein, the overtemperature detection coil is connected with the temperature control switch in parallel. The temperature control switch may be disposed at a position where the temperature of the super capacitor can be measured in the super capacitor module, and the specific position is not limited herein. The over-temperature detection signal contact is connected in series in the detection signal path. For example, fig. 5 is a schematic structural diagram of an over-temperature detection circuit according to an embodiment of the present disclosure. As shown in fig. 5, the temperature-controlled switch K11 is connected in parallel with the over-temperature detection coil KF 1. The temperature-controlled switch K11 may also be connected in series with a current-limiting resistor R1. When the temperature of the super capacitor module does not exceed the normal temperature threshold range, the temperature control switch K11 is normally opened, the over-temperature detection coil KF1 is electrified, and the over-temperature detection signal contact KA1 connected in series in the detection signal access is closed. When the temperature of super capacitor module exceeded normal temperature threshold value scope, it took place the excess temperature trouble to show the super capacitor module, and temperature detect switch K11 is closed, and excess temperature detection coil KF1 both ends electric potential equals, leads to coil KF1 to lose the electricity to make the disconnection of excess temperature detection signal contact KA 1. The normal temperature threshold range may be set according to a specific working scenario and a working requirement, and is not limited herein.

The overvoltage detection circuit comprises an overvoltage detection sensor, an overvoltage detection signal contact and an overvoltage detection coil. Wherein, the overvoltage detection coil is connected with the overvoltage detection sensor in parallel. The overvoltage detection signal contact is connected in series in the detection signal path. Fig. 6 is a schematic structural diagram of an overvoltage detection circuit according to an embodiment of the present application. As shown in fig. 6, the overvoltage detection sensor M1 is connected in parallel to the overvoltage detection coil K21. The overvoltage detection sensor M1 may also be connected to a switch T1, and the switch T1 is used to control whether the overvoltage detection circuit enters an operating state. The control end of the switch tube T1 is connected with the power supply end through a current limiting resistor R2. When the voltage of the super capacitor module does not exceed the normal voltage threshold, the overvoltage detection sensor M1 is not conducted, the overvoltage detection coil K21 is electrified, and the overvoltage detection signal contact KB1 connected in series in the detection signal passage is closed. When the voltage of the super capacitor module exceeds the normal voltage threshold value, the overvoltage fault of the super capacitor module is indicated, the overvoltage detection sensor M1 is conducted, the potentials at the two ends of the overvoltage detection coil K21 are equal, the coil K21 is powered off, and the overvoltage detection signal contact KB1 is disconnected.

The over-temperature detection circuit can be used for monitoring whether the super capacitor module has over-temperature faults or not in real time, and the overvoltage detection circuit can be used for monitoring whether the super capacitor module has overvoltage faults or not in real time. If the super capacitor has over-temperature faults and/or over-voltage faults, the detection signal path in the embodiment is short-circuited, and the over-temperature faults and/or the over-voltage faults can be found in time.

The embodiment of the application also provides a standby power supply device of the wind generating set. The standby power supply device comprises a cabinet body and the standby power supply system in the embodiment. And a super capacitor module and a super capacitor charger in the standby power supply system are arranged in the cabinet body. Fig. 7 is a schematic structural diagram of a cabinet provided in an embodiment of the present application. Fig. 8 is a schematic separated structure diagram of a cabinet provided in the embodiment of the present application. As shown in fig. 7 and 8, the cabinet includes a first sub-cabinet 21 and a second sub-cabinet 22 that are fastened together. The first sub-cabinet 21 is used for installing a super capacitor module, or the first sub-cabinet 21 is used for installing a super capacitor module and a super capacitor charger. The second sub-cabinet 22 is used for installing wiring and circuit breakers. A wire slot for installing a wire may be disposed in the second sub-cabinet 22.

Adopt the cabinet body to hold super capacitor module and super capacitor charger, at installation or maintenance process, stand-by power supply device easily passes through the narrow space of wheel hub and kuppe, does not influence the overall arrangement of other devices in the wheel hub, has improved the convenience of installation, fixed, maintenance.

In some examples, the cabinet further comprises a fixing structure 23 for connecting the first sub-cabinet 21 and the second sub-cabinet 22. The fixing structure 23 may be a bonding strip, and the like, and is not limited herein.

In order to facilitate heat dissipation, as shown in fig. 7 and 8, a heat dissipation window 211 may be disposed on the first sub-cabinet 21, and heat generated by the super capacitor module and the super capacitor charger may be dissipated through the heat dissipation window 211. In some examples, the cabinet may not have the heat dissipation window 211, and is not limited herein. For example, fig. 9 is a schematic view of a cabinet provided in another embodiment of the present application. The cabinet shown in fig. 9 is not provided with a heat radiation window.

In some examples, the number of the cabinets arranged on one shaft system can be set according to the requirement of the wind power generation unit on the standby power supply system, and more than two cabinets can be correspondingly arranged on one shaft system. For example, two cabinets can be arranged on each shafting, a super capacitor module is arranged in one cabinet, and a super capacitor module and a super capacitor charger are arranged in the other cabinet. For example, three super capacitor modules are arranged in one cabinet, and two super capacitor modules and one super capacitor charger are arranged in the other cabinet. The super capacitor modules in the two shafting cabinets are connected in series, and the super capacitor charger in the shafting upper cabinet can charge the super capacitor modules in the shafting upper cabinet. The heat dissipation window can also be arranged according to the part installed in the cabinet body, for example, if the super capacitor charger is not arranged in the cabinet body, the heat dissipation window is not arranged on the cabinet body. If the cabinet body is provided with the super capacitor charger, a heat dissipation window is arranged on the cabinet body. However, the conditions for installing the heat radiation window are not limited herein.

Through setting up the cabinet body more than two and holding super capacitor module and super capacitor charger, can reduce the volume of every cabinet body, the cabinet body can be easily through wind generating set's kuppe and the narrow space between the wheel hub, the installation of being convenient for more, fixed and maintenance.

In this application embodiment, wind generating set's stand-by power supply device includes wind generating set's in the above-mentioned embodiment stand-by power supply system, and super capacitor module and super capacitor charger among the stand-by power supply device set up in the cabinet body. And the super capacitor in the super capacitor module supplies power to a pitch system of the wind generating set when the power grid is powered off. And the super capacitor chargers of each shafting charge the super capacitor modules of each shafting. The super capacitor has the advantages of wide working temperature range, short charging time, low failure rate and long service life, and a standby power supply does not need to be frequently replaced, so that the maintenance cost of the wind generating set is reduced.

In some examples, a fixing assembly is provided inside the first sub-cabinet 11. Fig. 10 is a schematic structural diagram of a fixing assembly in a first sub-cabinet provided in an embodiment of the present application. As shown in fig. 10, the fixing member includes a fixing groove 24 and a fixing member 25 slidably disposed in the fixing groove 24 along the fixing groove 24. The super capacitor module or the super capacitor charger may be fixed in the first sub-cabinet 21 by a fixing member. Specifically, the fixing member 25 may be a fixing screw 252 with a base 251. The fixing groove 24 may be provided at the middle thereof with a hole through which the base 251 can pass. The fixing groove 24 may be welded to one surface of the first sub-cabinet 21. When the super capacitor module is fixed, after the fixing screw 252 with the base 251 penetrates into the fixing groove 24 through the hole in the middle of the fixing groove 24, the fixing screw 252 is moved to the two ends of the fixing groove 24. Since the two ends of the fixing groove 24 have a limiting function, the fixing screw 252 can be aligned with the fixing hole of the super capacitor module. And aligning and fixing the fixing hole of the super capacitor module with the fixing screw 252.

Because the fixing piece 25 can slide along the fixing groove 24, the super capacitor module can be successfully fixed under the condition that the requirement on the positioning precision for aligning the fixing piece 25 with the fixing hole of the super capacitor module is low, and the difficulty in mounting the super capacitor module is reduced. Moreover, when the fixing part 25 is damaged, the fixing part 25 can be replaced, the cabinet body is not scrapped integrally, and the cabinet body is not damaged in the replacement process, so that the cabinet body is convenient to maintain.

It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. For the embodiment of the standby power supply device, the relevant points can be referred to the description part of the embodiment of the standby power supply system. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Those skilled in the art can make various changes, modifications and additions after comprehending the spirit of the present invention. Also, a detailed description of known techniques is omitted herein for the sake of brevity.

It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the drawings, the specification, and the claims. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to denote a name and not to denote any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The functions of the various parts appearing in the claims may be implemented by a single hardware or software module. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Claims (10)

1. A standby power supply system of a wind generating set is characterized by comprising a plurality of super capacitor modules and super capacitor chargers, wherein the super capacitor modules are arranged in shafting of a hub;

the super capacitor module comprises a super capacitor, and the super capacitor is used for supplying power to a variable pitch system of the wind generating set under the condition of power grid outage;

and the super capacitor chargers of the shafting are used for charging the super capacitor modules of the shafting.

2. The backup power supply system according to claim 1, wherein said super capacitor module further comprises a fault detection circuit, wherein detection signal contacts of said fault detection circuit of said plurality of super capacitor modules are connected in series;

wherein the fault detection circuit comprises an over-temperature detection circuit and/or an over-voltage detection circuit.

3. The backup power supply system according to claim 2, wherein the detection signal contacts of the fault detection circuits of the plurality of super capacitor modules are connected in series to form a detection signal path with the detection signal contacts of the super capacitor charger,

the output end of the detection signal access is connected with a power supply normal signal end of a driving control cabinet of the variable pitch system;

and in the case that the detection signal path is broken, the state signal of the normal signal end of the power supply is reset.

4. The backup power system of claim 3, wherein said sense signal path further comprises a fuse sense contact in series with a sense signal contact of said supercapacitor charger.

5. The backup power supply system according to claim 3, wherein said fault detection circuit includes said over-temperature detection circuit,

the over-temperature detection circuit comprises a normally open temperature control switch, an over-temperature detection signal contact and an over-temperature detection coil, the over-temperature detection coil is connected with the temperature control switch in parallel, and the over-temperature detection signal contact is connected in a detection signal path in series;

when the temperature of the super capacitor module does not exceed the normal temperature threshold range, the temperature control switch is normally opened, the over-temperature detection coil is electrified, and the over-temperature detection signal contact is closed;

when the temperature of the super capacitor module exceeds the normal temperature threshold range, the temperature control switch is closed, the over-temperature detection coil loses power, and the over-temperature detection signal contact is disconnected.

6. The backup power supply system of claim 3, wherein said fault detection circuit comprises said over-voltage detection circuit,

the overvoltage detection circuit comprises an overvoltage detection sensor, an overvoltage detection signal contact and an overvoltage detection coil; the overvoltage detection coil is connected with the overvoltage detection sensor in parallel, and the overvoltage detection signal contact is connected in a detection signal passage in series;

when the voltage of the super capacitor module does not exceed a normal voltage threshold, the overvoltage detection sensor is not conducted, the overvoltage detection coil is electrified, and the overvoltage detection signal contact is closed;

when the voltage of the super capacitor module exceeds a normal voltage threshold value, the overvoltage detection sensor is conducted, the overvoltage detection coil loses power, and the overvoltage detection signal contact is disconnected.

7. A backup power supply device of a wind generating set, characterized by comprising a cabinet body and a backup power supply system of the wind generating set according to any one of claims 1 to 6, wherein the super capacitor module and the super capacitor charger in the backup power supply system are arranged in the cabinet body;

the cabinet body comprises a first sub-cabinet body and a second sub-cabinet body which are buckled;

the first sub-cabinet body is used for installing a super capacitor module, or installing the super capacitor module and the super capacitor charger;

the second sub-cabinet body is used for installing wiring and a circuit breaker.

8. The backup power supply device according to claim 7, wherein a heat dissipation window is provided on the first sub-cabinet.

9. The backup power supply apparatus of claim 7, wherein said cabinet further comprises a securing structure for connecting the first sub-cabinet and the second sub-cabinet.

10. The backup power supply apparatus according to claim 7, wherein a fixing member is provided inside said first sub-cabinet,

the fixing assembly comprises a fixing groove and a fixing piece which is arranged in the fixing groove and can slide along the fixing groove;

the super capacitor module or the super capacitor charger can be fixed in the first sub-cabinet body through the fixing piece.

Images