CN210422873U

CN210422873U - ZAPI driver-based low-voltage alternating-current variable pitch system

Info

Publication number: CN210422873U
Application number: CN201920857358.4U
Authority: CN
Inventors: 孙志国; 赵洪岩; 陈吉帅
Original assignee: Renergy Electric Suzhou Co ltd
Current assignee: Suzhou Xinnengjian Electric Co ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-04-28
Anticipated expiration: 2029-06-10

Abstract

A ZAPI driver-based low-voltage alternating-current variable-pitch system belongs to the technical field of renewable clean energy and comprises a main control unit, a communication unit, a first variable-pitch shaft control cabinet, a second variable-pitch shaft control cabinet, a third variable-pitch shaft control cabinet, a first variable-pitch working unit, a second variable-pitch working unit and a third variable-pitch working unit, wherein the first variable-pitch shaft control cabinet, the second variable-pitch shaft control cabinet and the third variable-pitch shaft control cabinet are electrically connected with the main control unit through the communication unit respectively, the first variable-pitch shaft control cabinet is electrically connected with the first variable-pitch working unit, the second variable-pitch shaft control cabinet is electrically connected with the second variable-pitch working unit, and the third variable-pitch shaft control cabinet is electrically connected with the third variable-pitch working unit. The utility model discloses a low pressure exchanges becomes oar system based on ZAPI driver, it is one of wind generating set's core component to become oar control system, and along with wind generating set's power constantly increases, the low pressure exchanges and becomes oar system advantage in the aspect of security and on-the-spot maintenance very obvious.

Description

ZAPI driver-based low-voltage alternating-current variable pitch system

Technical Field

The utility model belongs to the technical field of the clean energy of can regenerating, specifically, relate to low pressure exchanges and becomes oar system based on ZAPI driver.

Background

As the fossil energy sources such as coal, petroleum and the like are gradually reduced in the global scope, all countries in the world shift the attention to the research, development and utilization of renewable clean energy sources, and wind power generation becomes the key point of new energy strategy in China, and is one of the green energy sources which are developed fastest and have large-scale development and utilization in recent years. At present, wind generating sets are continuously developing towards large-scale, variable pitch and variable speed constant frequency.

The pitch regulation mode is that the included angle between the windward side of the blade and the longitudinal rotating shaft is changed, so that the stress and resistance of the blade are influenced, and the output power is kept constant. Most of the existing wind field units adopt direct-current variable pitch systems to realize pitch adjustment, and the direct-current variable pitch systems occupy most of wind power markets by virtue of the advantages of high control precision, large starting torque, high reaction speed and the like. However, as the power of the whole machine is continuously increased, the size of the direct current motor becomes huge, which is not beneficial to installation and control. The alternating-current variable-pitch control system can be widely applied to a high-power wind power generation system due to the factors of small motor size, simple structure, convenience in maintenance and the like. At present, in the prior art, all manufacturers of the system have own design characteristics, and a new pitch control system is developed on the basis of the existing system.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims at providing a low pressure exchanges becomes oar system based on ZAPI driver, low pressure exchanges and becomes oar system and adopt the modularized design theory, the device quantity that has significantly reduced and the volume that becomes the oar cabinet, the technical advantage in make full use of low pressure drive field adopts low-voltage system, and the series quantity that can significantly reduce super capacitor module like this and relevant voltage balance circuit have significantly reduced the possibility of appearing the circuit trouble, especially the unbalance fault of capacitor voltage.

The technical scheme is as follows: the utility model provides a low pressure exchanges becomes oar system based on ZAPI driver, become oar axle accuse cabinet, second variable oar axle accuse cabinet, third variable oar axle accuse cabinet, first oar work unit, second variable oar work unit and third variable oar work unit including main control unit, communication unit, first variable oar axle accuse cabinet, second variable oar axle accuse cabinet and third become oar axle accuse cabinet and pass through communication unit and main control unit electric connection respectively, first variable oar axle accuse cabinet and first variable oar work unit electric connection, second variable oar axle accuse cabinet becomes oar work unit electric connection with the second, third variable oar axle accuse cabinet and third variable oar work unit electric connection. The utility model discloses a low pressure exchanges becomes oar system based on ZAPI driver, it is one of wind generating set's core component to become oar control system, and along with wind generating set's power constantly increases, the low pressure exchanges and becomes oar system advantage in the aspect of security and on-the-spot maintenance very obvious.

Further, in the ZAPI driver-based low-voltage alternating-current variable-pitch system, the communication unit is CAN communication.

Further, in the ZAPI driver-based low-voltage alternating-current pitch control system, the first pitch control shaft control cabinet, the second pitch control shaft control cabinet and the third pitch control shaft control cabinet include a power module, a supercapacitor bank, a pitch control driver and a PLC, and the power module, the supercapacitor bank, the pitch control driver and the PLC are connected through a control circuit and an overvoltage protection circuit.

Further, in the ZAPI driver-based low-voltage alternating-current pitch control system, the first pitch control working unit comprises a first limit switch, a first position sensor, a second position sensor, a first motor end encoder, a first motor brake, a first motor power supply line and a first pitch control motor, the first limit switch, the first position sensor and the first position sensor are connected with the first pitch control shaft control cabinet through wires or cables, and the first motor end encoder, the first motor brake and the first motor power supply line are arranged between the first pitch control shaft control cabinet and the first pitch control motor.

Further, in the ZAPI driver-based low-voltage alternating-current pitch control system, the second pitch control working unit comprises a second limit switch, a third position sensor, a fourth position sensor, a second motor end encoder, a second motor brake, a second motor power supply line and a second pitch control motor, the second limit switch, the third position sensor and the fourth position sensor are connected with the second pitch control shaft cabinet through wires or cables, and the second motor end encoder, the second motor brake and the second motor power supply line are arranged between the second pitch control shaft cabinet and the second pitch control motor.

Further, in the ZAPI driver-based low-voltage alternating-current pitch control system, the third pitch control working unit includes a third limit switch, a fifth position sensor, a sixth position sensor, a third motor end encoder, a third motor brake, a third motor power supply line and a third pitch control motor, the third limit switch, the fifth position sensor and the sixth position sensor are connected with the third pitch control shaft cabinet through wires or cables, and the third motor end encoder, the third motor brake and the third motor power supply line are arranged between the third pitch control shaft cabinet and the third pitch control motor.

Further, in the low-voltage alternating-current variable pitch system based on the ZAPI driver, shaft cabinet safety chains are arranged on the first variable pitch shaft control cabinet, the second variable pitch shaft control cabinet and the third variable pitch shaft control cabinet.

Further, in the low-voltage alternating-current variable pitch system based on the ZAPI driver, the first limit switch, the second limit switch and the third limit switch are 95-degree limit switches.

Further, in the ZAPI driver-based low-voltage alternating-current variable pitch system, the angle values of the first position sensor, the third position sensor and the fifth position sensor are 90 °.

Further, in the ZAPI driver-based low-voltage alternating-current variable pitch system, the angle values of the second position sensor, the fourth position sensor and the sixth position sensor are 3-5 degrees.

Above-mentioned technical scheme can find out, the utility model discloses following beneficial effect has: the utility model discloses a low pressure alternating current variable pitch system based on ZAPI driver adopts a low pressure alternating current drive design scheme that a super capacitor is used as a backup power supply; the variable pitch system consists of 3 variable pitch control cabinets, and each blade is provided with a special variable pitch driving system to complete variable pitch and safety control; each variable pitch control cabinet is internally provided with a power supply module, a super capacitor bank, a variable pitch driver, a PLC, a control circuit and an overvoltage protection circuit; the electrical isolation of the power supply is realized between the variable pitch control cabinet and the engine room and between the variable pitch control cabinet and the variable pitch control cabinet; the power module adopts a cold plate technology, the servo driver is high in efficiency and low in power consumption, a fan is not needed for cooling, the complete isolation of the inside of the variable pitch control cabinet from the external environment is realized, water resistance, salt mist resistance and wind and sand resistance can be realized, a heater is additionally arranged in the cabinet, and the variable pitch system can be ensured to adapt to a severe environment;

has the following advantages:

1) a three-cabinet type low-voltage large-current alternating-current variable-pitch system is adopted, the low-penetration function is good, a PLC and a driver adopt a CAN bus communication protocol, and independent CAN communication modes are adopted among the main control box body and the variable-pitch box body.

2) The electrical interface is consistent with the master control, the communication protocol and parameters are consistent with the master control, and different communication protocol requirements of the master control can be met. The control requirement of the fan variable pitch system can be completely met.

3) Two DC/DC converters are adopted, and adverse effects on the PLC caused by actions of the relay and the brake device are avoided.

4) The super capacitor bank and the servo driver are directly connected to the direct current bus, and the connection mode can realize the low voltage ride through function.

5) By adopting the current modular design concept, the number of devices and the volume of the pitch control cabinet are greatly reduced. The requirements and safety of the variable pitch system are completely met in the aspect of electrical control, control loop devices are greatly simplified, and the maintenance is more convenient.

Drawings

Fig. 1 is the structure block diagram of a low-voltage ac pitch control system based on a ZAPI driver of the present invention.

In the figure: the system comprises a main control unit 1, a communication unit 2, a first pitch-variable shaft control cabinet 3, a power supply module 31, a super capacitor bank 32, a pitch driver 33, a PLC34, a second pitch-variable shaft control cabinet 4, a third pitch-variable shaft control cabinet 5, a first pitch-variable working unit 6, a first limit switch 61, a first position sensor 62, a second position sensor 63, a first motor end encoder 64, a first motor brake 65, a first motor power supply line 66, a first pitch-variable motor 67, a second pitch-variable working unit 7, a second limit switch 71, a third position sensor 72, a fourth position sensor 73, a second motor end encoder 74, a second motor brake 75, a second motor power supply line 76, a second pitch-variable motor 77, a third pitch-variable working unit 8, a third limit switch 81, a fifth position sensor 82, a sixth position sensor 83, a third motor end encoder 84, a third motor brake 85, a third motor power supply line 86, a third pitch, A pitch control motor III 87 and a shaft cabinet safety chain 9.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

The ZAPI driver-based low-voltage alternating-current variable-pitch system as shown in fig. 1 comprises a main control unit 1, a communication unit 2, a first variable-pitch shaft control cabinet 3, a second variable-pitch shaft control cabinet 4, a third variable-pitch shaft control cabinet 5, a first variable-pitch working unit 6, a second variable-pitch working unit 7 and a third variable-pitch working unit 8, wherein the first variable-pitch shaft control cabinet 3, the second variable-pitch shaft control cabinet 4 and the third variable-pitch shaft control cabinet 5 are respectively electrically connected with the main control unit 1 through the communication unit 2, the first variable-pitch shaft control cabinet 3 is electrically connected with the first variable-pitch working unit 6, the second variable-pitch shaft control cabinet 4 is electrically connected with the second variable-pitch working unit 7, and the third variable-pitch shaft control cabinet 5 is electrically connected with the third variable-pitch working unit 8. Wherein, the communication unit 2 is CAN communication. In the above structure, the first pitch-variable shaft control cabinet 3, the second pitch-variable shaft control cabinet 4, and the third pitch-variable shaft control cabinet 5 include a power module 31, a supercapacitor bank 32, a pitch driver 33, and a PLC34, and the power module 31, the supercapacitor bank 32, the pitch driver 33, and the PLC34 are connected by a control line and an overvoltage protection line.

In addition, the first pitch control working unit 6 comprises a limit switch I61, a position sensor I62, a position sensor II 63, a motor end encoder I64, a motor brake I65, a motor power supply line I66 and a pitch control motor I67, the limit switch I61, the position sensor I62 and the position sensor II 63 are connected with the first pitch control shaft cabinet 3 through wires or cables, and the motor end encoder I64, the motor brake I65 and the motor power supply line I66 are arranged between the first pitch control shaft cabinet 3 and the pitch control motor I67. The second pitch control working unit 7 comprises a limit switch II 71, a position sensor III 72, a position sensor IV 73, a motor tail end encoder II 74, a motor brake II 75, a motor power supply line II 76 and a pitch control motor II 77, the limit switch II 71, the position sensor III 72 and the position sensor IV 73 are connected with the second pitch control shaft cabinet 4 through electric wires or cables, and the motor tail end encoder II 74, the motor brake II 75 and the motor power supply line II 76 are arranged between the second pitch control shaft cabinet 4 and the pitch control motor II 77. The third pitch control working unit 8 comprises a limit switch three 81, a position sensor five 82, a position sensor six 83, a motor end encoder three 84, a motor brake three 85, a motor power supply line three 86 and a pitch control motor three 87, the limit switch three 81, the position sensor five 82 and the position sensor six 83 are connected with the third pitch control shaft cabinet 5 through electric wires or cables, and the motor end encoder three 84, the motor brake three 85 and the motor power supply line three 86 are arranged between the third pitch control shaft cabinet 5 and the pitch control motor three 87. The first limit switch 61, the second limit switch 71 and the third limit switch 81 are 95-degree limit switches. The angular values of position sensor one 62, position sensor three 72 and position sensor five 82 are 90. The angular values of position sensor two 63, position sensor four 73 and position sensor six 83 are 3-5 deg..

In addition, shaft cabinet safety chains 9 are arranged on the first pitch-variable shaft control cabinet 3, the second pitch-variable shaft control cabinet 4 and the third pitch-variable shaft control cabinet 5.

According to the low-voltage alternating-current variable-pitch system based on the ZAPI driver, the variable-pitch following angle error control precision reaches 2 degrees; under the condition of power supply by a power supply, the variable pitch system can be suitable for the environment temperature of minus 40 ℃; when the alternating current power supply voltage of the power grid is too low and even interrupted within 3 seconds, the variable pitch system can still normally operate by virtue of a capacitor direct current backup power supply per se; when the system fails, the propeller changing system can smoothly complete safe propeller retracting.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications can be made without departing from the principles of the present invention, and these modifications should also be regarded as the protection scope of the present invention.

Claims

1. ZAPI driver-based low-voltage alternating-current variable pitch system is characterized in that: the system comprises a main control unit (1), a communication unit (2), a first variable pitch shaft control cabinet (3), a second variable pitch shaft control cabinet (4), a third variable pitch shaft control cabinet (5), a first variable pitch working unit (6), a second variable pitch working unit (7) and a third variable pitch working unit (8), wherein the first variable pitch shaft control cabinet (3), the second variable pitch shaft control cabinet (4) and the third variable pitch shaft control cabinet (5) are respectively electrically connected with the main control unit (1) through the communication unit (2), the first variable pitch shaft control cabinet (3) is electrically connected with the first variable pitch working unit (6), the second variable pitch shaft control cabinet (4) is electrically connected with the second variable pitch working unit (7), and the third variable pitch shaft control cabinet (5) is electrically connected with the third variable pitch working unit (8).

2. The ZAPI-driver-based low voltage alternating current pitch system of claim 1, wherein: the communication unit (2) is in CAN communication.

3. The ZAPI-driver-based low voltage alternating current pitch system of claim 1, wherein: the first variable-pitch shaft control cabinet (3), the second variable-pitch shaft control cabinet (4) and the third variable-pitch shaft control cabinet (5) comprise a power module (31), a super capacitor bank (32), a variable-pitch driver (33) and a PLC (34), and the power module (31), the super capacitor bank (32), the variable-pitch driver (33) and the PLC (34) are connected through a control circuit and an overvoltage protection circuit.

4. The ZAPI-driver-based low voltage alternating current pitch system of claim 1, wherein: the first variable-pitch working unit (6) comprises a limit switch I (61), a position sensor I (62), a position sensor II (63), a motor tail end encoder I (64), a motor brake I (65), a motor power supply line I (66) and a variable-pitch motor I (67), the limit switch I (61), the position sensor I (62) and the position sensor II (63) are connected with the first variable-pitch shaft control cabinet (3) through electric wires or cables, and the motor tail end encoder I (64), the motor brake I (65) and the motor power supply line I (66) are arranged between the first variable-pitch shaft control cabinet (3) and the variable-pitch motor I (67).

5. The ZAPI-driver-based low voltage alternating current pitch system of claim 4, wherein: the second variable-pitch working unit (7) comprises a limit switch II (71), a position sensor III (72), a position sensor IV (73), a motor tail end encoder II (74), a motor brake II (75), a motor power supply line II (76) and a variable-pitch motor II (77), the limit switch II (71), the position sensor III (72) and the position sensor IV (73) are connected with the second variable-pitch shaft control cabinet (4) through electric wires or cables, and the motor tail end encoder II (74), the motor brake II (75) and the motor power supply line II (76) are arranged between the second variable-pitch shaft control cabinet (4) and the variable-pitch motor II (77).

6. The ZAPI-driver-based low voltage alternating current pitch system of claim 5, wherein: the third variable-pitch working unit (8) comprises a limit switch III (81), a position sensor V (82), a position sensor VI (83), a motor end encoder III (84), a motor brake III (85), a motor power supply line III (86) and a variable-pitch motor III (87), the limit switch III (81), the position sensor V (82) and the position sensor VI (83) are connected with the third variable-pitch shaft control cabinet (5) through electric wires or cables, and the motor end encoder III (84), the motor brake III (85) and the motor power supply line III (86) are arranged between the third variable-pitch shaft control cabinet (5) and the variable-pitch motor III (87).

7. The ZAPI-driver-based low voltage alternating current pitch system of claim 1, wherein: and shaft cabinet safety chains (9) are arranged on the first variable propeller shaft control cabinet (3), the second variable propeller shaft control cabinet (4) and the third variable propeller shaft control cabinet (5).

8. The ZAPI-driver-based low voltage alternating current pitch system of claim 6, wherein: the first limit switch (61), the second limit switch (71) and the third limit switch (81) are 95-degree limit switches.

9. The ZAPI-driver-based low voltage alternating current pitch system of claim 6, wherein: the angular values of the first position sensor (62), the third position sensor (72) and the fifth position sensor (82) are 90 degrees.

10. The ZAPI-driver-based low voltage alternating current pitch system of claim 6, wherein: and the angle values of the second position sensor (63), the fourth position sensor (73) and the sixth position sensor (83) are 3-5 degrees.