CN212615161U

CN212615161U - Automatic power supply control device of wind driven generator yaw system

Info

Publication number: CN212615161U
Application number: CN202020917151.4U
Authority: CN
Inventors: 王剑彬; 吴叙锐; 贾跟卯; 骆福权
Original assignee: Huaneng Shanwei Wind Power Co ltd
Current assignee: Huaneng Shanwei Wind Power Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-02-26
Anticipated expiration: 2030-05-27

Abstract

An automatic power supply control device of a wind driven generator yaw system comprises an alternating current wind driven generator, a storage battery, a switching circuit, a charging circuit, a detection circuit and a control circuit; the alternating-current wind driven generator is vertically arranged on the supporting rod; the storage battery, the switching circuit, the charging circuit, the detection circuit and the control circuit are arranged in the element box; and is electrically connected with a starting power switch and a flameout power switch of the alternating current wind driven generator and the diesel generator. This novel small-size aerogenerator and detection circuitry can whether wind direction driftage has taken place in real-time supervision scene, when not taking place the yaw, the automatic switch-on aerogenerator of change over circuit is for the power supply of yaw control system, when taking place the yaw, control circuit and change over circuit can start diesel generator electricity generation the very first time to switch over diesel generator for the power supply of yaw system, and can fully guarantee that the diesel engine is effectively started, have brought favourable technical support to aerogenerator normal use.

Description

Automatic power supply control device of wind driven generator yaw system

Technical Field

The utility model relates to a supporting relevant equipment field of aerogenerator, especially an aerogenerator driftage system automatic power supply controlling means.

Background

The wind driven generator is more and more widely applied due to environmental protection and energy conservation. When the large-scale wind driven generator actually works, because the wind direction on site is not certain, wind may blow in from the front of the blade of the wind driven generator along the blade direction with favorable stress, so that the wind driven generator can be in a normal working state, but when the wind blows in from the two side ends or the rear side end of the blade, the wind direction and the blade are not in the blade direction any more, so that the power generation capacity of the wind driven generator is reduced, and the blade and the like may be damaged. In order to prevent the influence of yaw wind on the normal operation of the wind driven generator, the existing large wind driven generator is provided with a yaw control system. The yaw control system has the function that according to the change of the field wind direction, the controller drives the engine room of the wind driven generator to rotate around the center line of the upper end of the tower of the wind driven generator, so that the blades and the changed wind direction are kept in a slurry state, and the wind driven generator is further ensured to be in a normal working state.

Because the power generation voltage of the wind driven generator is reduced when the wind direction yaw occurs, if the yaw control system powered by the output power supply of the wind driven generator is not matched with other power supply modes, the yaw control system cannot work normally due to too low input voltage of the yaw control system or even no voltage input when the wind driven generator is in yaw, and further the wind driven generator is uncontrollable, and the power generation capacity is reduced or damaged. Based on the above, the yaw control system of the existing large wind driven generator is matched with the storage battery or the diesel generator, and because the yaw control system needs higher voltage input and consumes more power, when the storage battery is adopted for power supply, because the required storage batteries are large in quantity, the maintenance cost is high, the large wind driven generator is extremely few in application, and the large wind driven generator can be generally selected by a low-power wind driven generator. Most yaw control systems of the existing large-scale wind driven generators adopt diesel generators, and under the action of relevant equipment of the yaw control system, when the wind direction is yaw, the diesel generators can be automatically started, the power supply between the wind driven generator and the yaw control system is disconnected, and the power supply between the diesel generators and the yaw control system is connected; and after the wind direction and the blades are feathered, the diesel generator is closed, and the power supply between the wind driven generator and the yaw control system is switched on again. Because the related equipment of the existing yaw control system controls the diesel engine of the diesel generator to start and the related equipment only outputs a control command to the diesel engine starting power switch of the diesel generator once, under the actual condition, the diesel engine of the diesel generator cannot be effectively started (when the weather temperature is low, the probability of one-time starting is smaller), and further the yaw control system cannot be ensured to be in the power-on state, and the work of the yaw control system cannot be ensured. In addition, related equipment of the existing yaw control system of the large-scale wind driven generator detects whether the wind driven generator yaws, the signal source of the yaw control system is to monitor the voltage change of an output power supply of the wind driven generator, and when the output voltage of the wind driven generator is lower than a certain value or the output power supply is stopped, the related equipment judges that the wind direction yaws to cause the output voltage of the wind driven generator to be reduced or the power supply is not output, so that the diesel generator is started. In practical situations, the wind turbine may fail to output power (no wind yaw occurs) due to too low external wind power and the inability of the blades to rotate, or the output voltage of the wind turbine may decrease (no wind yaw occurs), so that the number of times of controlling the diesel engine to start and shut down by the yaw control system related devices is correspondingly increased based on monitoring the voltage change of the output power of the wind turbine as a control signal, which may cause unnecessary energy waste.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects that the frequency of controlling the starting and the closing of a diesel engine by related equipment of the yaw control system is correspondingly increased and unnecessary energy waste is caused on the basis of monitoring the voltage change of an output power supply of the wind driven generator as a control signal, and the related equipment of the yaw control system controls the starting of the diesel engine, the related equipment only outputs a control command to a diesel engine starting power supply switch of the diesel engine generator once, the diesel engine can not be ensured to be effectively started, the yaw control system can not be ensured to be in a power-on state, and the work of the yaw control system can not be ensured, the utility model provides a yaw control system which can monitor the wind direction yaw condition around the wind driven generator in real time without adopting the voltage change of the output power supply of the wind driven generator as the control signal under the combined action of the related equipment and circuits, when yaw happens, the automatic power supply control device for the yaw system of the wind driven generator can be started at the first time and switch the diesel generator to supply power to the yaw system, can fully ensure the effective starting of the diesel generator and bring beneficial technical support to the normal use of the wind driven generator.

The utility model provides a technical scheme that its technical problem adopted is:

an automatic power supply control device of a wind driven generator yaw system comprises an alternating current wind driven generator and a storage battery, and is characterized by also comprising a switching circuit, a charging circuit, a detection circuit and a control circuit; a connecting rod is transversely arranged at the upper end of a rotating shaft of the alternating-current wind driven generator, a direction plate is arranged at one side end of the connecting rod, a bearing is arranged at the other side of the connecting rod, a fan blade is sleeved on the outer ring of the bearing, a supporting rod is arranged at the side end of a supporting column of the wind driven generator, and the alternating-current wind driven generator is vertically arranged on the supporting; the storage battery, the switching circuit, the charging circuit, the detection circuit and the control circuit are arranged in the element box; the power output end of the wind driven generator is electrically connected with the power input end of the charging circuit, and the power output end of the charging circuit is electrically connected with the power input end of the storage battery; the power output end of the alternating current wind driven generator is electrically connected with the alternating current power input end of the detection circuit; the power supply output end of the storage battery is electrically connected with the direct-current power supply input end of the detection circuit, and the three signal output ends of the detection circuit are respectively and electrically connected with the two signal input ends of the control circuit and the signal input end of the switching circuit; the negative electrode of the storage battery is electrically connected with the switching circuit and the negative power supply input end of the control circuit; the power supply output end of the wind driven generator, the power supply output end of the diesel generator matched with the wind driven generator and the two signal input ends of the switching circuit are respectively and electrically connected; the power output end of the switching circuit is electrically connected with the power input end of a yaw control system matched with the wind driven generator; and the starting power switch and the flameout power switch of the diesel generator are respectively and electrically connected with the two control signal output ends of the control circuit.

Further, the switching circuit is a relay.

Furthermore, the charging circuit is an alternating current to direct current switching power supply module.

Furthermore, the detection circuit comprises a three-terminal voltage integrated monitoring circuit with the model number AN051A, a resistor, a relay, AN adjustable resistor, AN NP N triode, a DC-DC power supply module and a time controller, wherein the three-terminal voltage integrated monitoring circuit, the resistor, the relay, the adjustable resistor, the NP N triode, the DC-DC power supply module and the time controller are connected through circuit board wiring, the 3 pin of the positive power supply output end of the DC-DC power supply module is connected with one end of the adjustable resistor and the positive power supply input end of the first relay, the 2 pin of the positive power supply input end of the three-terminal voltage integrated monitoring circuit is connected with the other end of the adjustable resistor, the 1 pin of the output end of the three-terminal voltage integrated monitoring circuit is connected with one end of the resistor, the other end of the resistor is connected with the base electrode of the triode, the negative power input end of the time controller is connected with a pin 2, the control power input end of the first relay, the control power input end of the second relay and the positive power input end of the time controller are connected with a pin 1, and the power output ends 3 and 4 of the time controller are respectively connected with the positive and negative power input ends of the second relay.

The control circuit comprises time control switches, temperature switches, electrolytic capacitors, resistors, NPN triodes and relays, wherein the time control switches are connected through circuit board wiring, the time control switches are provided with two sets, the negative power input ends of the first set of time control switches and the second set of time control switches are connected with the negative electrodes of the electrolytic capacitors and the emitting electrodes of the NPN triodes, the two power output ends of the second set of time control switches are respectively connected with the two power input ends of the second relays, the two power output ends of the first set of time control switches are respectively connected with the two power input ends of the first relays, the normally closed contact end of the third relay is connected with the positive power input end of the first set of time control switches, the control power input end of the third relay is connected with one end of the temperature switch, the other end of the temperature switch is connected with one end of the first resistor and the power input end of the third, One end of the second resistor is connected, the other end of the second resistor is connected with the base of the NPN triode, the collector of the NPN triode is connected with the input end of the negative power supply of the third relay, and the temperature switch is installed on the outer side of the exhaust pipe of the diesel engine of the diesel generator.

The utility model has the advantages that: in this is novel, because small-size alternating current wind power generation machine installs perpendicularly on the fixed plate, the direction board that alternating current wind power generation machine's direction movement certain distance, and then alternating current wind power generation machine's pivot drive rotor rotation can both be blown to the wind that any direction was insufflated, and alternating current wind power generation machine sends the electric energy that is higher than more than 6V, and like this, small-size wind power generation machine and detection circuitry can the on-the-spot wind direction driftage that has taken place of real-time supervision. When no yaw occurs, the switching circuit automatically switches on the wind driven generator to supply power for the yaw control system, and when the yaw occurs, the control circuit and the switching circuit can start the diesel generator to generate power at the first time, switch the diesel generator to supply power for the yaw system, fully ensure that the diesel engine is effectively started, and bring favorable technical support for normal use of the wind driven generator. Based on the above, so the utility model discloses good application prospect has.

Drawings

The invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural view of an ac wind power generator of the present invention.

Fig. 2 is a block diagram of the present invention.

Fig. 3 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, an automatic power supply control device for a yaw system of a wind driven generator comprises a small-sized alternating current wind driven generator 1, a standby storage battery 2, a switching circuit 3, a charging circuit 4, a detection circuit 5 and a control circuit 6; a fixing plate 101 is installed at the lower end of the alternating current wind power generator 1, a connecting rod 102 is transversely welded at the upper end of a rotating shaft 106 of the alternating current wind power generator 1, a rectangular direction plate 105 is vertically welded at the right side end of the connecting rod 102, a bearing 103 is sleeved at the left side of the connecting rod 102, a fan blade 104 is sleeved at the outer ring of the bearing 103 (when wind blows from the front end, the fan blade 104 can rotate at the backward side end, the direction plate 105 rotates to the front end, when follow-up wind blows from the back end, the fan blade can rotate at the forward side end, and the direction plate 105 rotates to the back end), a supporting rod 71 with a certain length is transversely installed at the right side end of the middle part of a supporting column 7 of the large-scale wind driven generator through a screw nut, and the alternating current wind driven generator 1 is vertically distributed and installed on the front end of the supporting rod 71 through a fixing plate 101 through the screw nut (the alternating current wind driven generator does not collide with the lower end blade of the wind driven generator); the storage battery 2, the switching circuit 3, the charging circuit 4, the detection circuit 5 and the control circuit 6 are installed on a circuit board, the circuit board is installed in an element box 8, and the element box 8 is installed in an electric control box of the large-scale wind driven generator.

As shown in fig. 1, 2 and 3, the small ac wind power generator M2 is JBD, the output voltage is ac 6V-24V, a multistage gear speed increasing mechanism is provided in the casing of the ac wind power generator M2, the rotor of the ac wind power generator M2 can rotate 24 circles when the rotating shaft rotates one circle, and since the ac wind power generator M2 is vertically installed on the fixing plate 101, the wind blowing in any direction can blow the direction plate 105 to move for a certain distance, and then the rotating shaft 106 drives the rotor to rotate, so that the ac wind power generator M2 can generate electric energy higher than 6V; the backup battery G is a type 12V/20 Ah lithium battery. The switching circuit is a relay K4 with two power input terminals, two normally open contact terminals and two normally closed contact terminals. The charging circuit is a finished product A4 of an AC-to-DC switching power supply module (switching power supply module, model 220V/12.7V), the input voltage is 220V, the output voltage is 12.7V, and the output power is 24W. The detection circuit comprises a three-terminal voltage integrated monitoring circuit A with the model number AN051A, a resistor R2, a relay K and a K5, AN adjustable resistor RP1 and AN NPN triode Q, DC-DC power supply module A5 (a direct current-to-direct current voltage reduction module with the model number LM2596, AN input voltage of 6V-24V and AN output voltage of 5V) and a time controller A1, wherein the three-terminal voltage integrated monitoring circuit A and the adjustable resistor RP1 are connected through a circuit board in a wiring way, the time controller A1 is a finished product of a model LD/force shield electric timing switch module and is provided with a three-position digital display tube (capable of displaying the maximum 999 seconds), two power supply input ends 1 and 2 pins, two

power output ends

4 and 5 pins, a trigger power input end 3 pin and three setting keys (respectively a mode selection key, a shift key and AN adjusting key) in application, the time of outputting power by the two power output ends 4 and 5 pins after the 3 pins are triggered, every time the 3 pins are triggered by high level, two power output ends 4 and 5 pins can output primary power, the 3 pins of the positive power output end of the DC-DC power module A5 are connected with one end of an adjustable resistor RP1 and the positive power input end of a first relay K, the 2 pins of the positive power input end of the three-terminal voltage integration monitoring circuit A are connected with the other end of the adjustable resistor RP1, the 1 pin of the output end of the three-terminal voltage integration monitoring circuit A is connected with one end of a resistor R2, the other end of the resistor R2 is connected with the base electrode of an NPN triode Q, the collector electrode of the NPN triode Q is connected with the negative power input end of the first relay K, the 3 pins of the negative power input end of the three-terminal voltage integration monitoring circuit A5 are connected with the emitter electrode of the NPN triode Q, the 4 pins of the negative power output end of the DC-DC power module A5 and, The control power supply input end of the second relay K5 is connected with the pin 1 of the positive power supply input end of the time controller A1, and the

pins

4 and 5 of the power supply output end of the time controller A1 are respectively connected with the positive and negative pole power supply input ends of the second relay K5. The control circuit comprises time control switches A2 and A3, a temperature switch WK, an electrolytic capacitor C2, resistors R and R1, an NPN triode Q2 and relays K1, K2 and K3, the two sets of time control switches A2 and A3 are connected by circuit board wiring, the time control switches A2 and A3 are microcomputer time control switch products with model KG316T, the microcomputer time control switch products are provided with a liquid crystal display and seven keys of cancel/recovery, time correction, week correction, automatic/manual, timing and clock, and two power input terminals 1 and 2 pins, two power output terminals 3 and 4 pins, the user respectively operates seven keys through the numbers displayed by the LCD screen after the power is on, the time of power output by the two power output ends 3 and 4 can be set, the finished microcomputer time control switch has a memory function, and the power failure of the external power supply can not cause the change of an internal set time program as long as the secondary setting adjustment is not carried out; the negative power input end 2 pin of the first and second time control switches A2 and A3 is connected with the negative electrode of the electrolytic capacitor C2 and the emitting electrode of the NPN triode Q2, the power output two ends 3 and 4 pins of the second time control switch A3 are respectively connected with the power input two ends of the second relay K3, the power output two ends 3 and 4 pins of the first time control switch A2 are respectively connected with the power input two ends of the first relay K2, the normally closed contact end of the third relay K1 is connected with the positive power input end 1 pin of the first time control switch A2, the control power input end of the third relay K1 is connected with one end of the temperature switch WK, the other end of the temperature switch WK is connected with one end of the first resistor R and the positive power input end of the third relay K1, the other end of the first resistor R is connected with the positive electrode of the electrolytic capacitor C2 and one end of the second resistor R1, the other end of the second resistor R1 is connected with the base electrode of the triode Q2, the collector of the NPN triode Q2 is connected with the negative power supply input end of the third relay K1; the temperature switch WK is fixedly arranged on the outer side of the middle part of a diesel engine exhaust pipe of the diesel generator by a screw nut, and the temperature sensing surface of the temperature switch WK is tightly attached to the outer side of the exhaust pipe.

As shown in fig. 1, 2 and 3, the power output end of the wind driven generator M and the power input end of the charging circuit are connected with pins 1 and 2 of the switching power module a4 through wires; the power output end of the charging circuit is connected with the

pins

3 and 4 of the switching power supply module A4 and the two power input ends of the standby storage battery G through leads respectively. The power output end of the alternating-current wind driven generator M2 and the alternating-current power input end of the detection circuit are respectively connected with pins 1 and 2 of the DC-DC power module A5 through leads. The power supply output end of the standby storage battery G, the control power supply input end of the direct-current power supply input end of the detection circuit and the emitting electrode of the NPN triode Q are respectively connected through leads. Two signal output end relay K5 normally open contact ends of detection circuit, relay K5 normally closed contact end and two signal input end relay K1 control power input end of control circuit, 1 foot of time control switch A3 are connected through the wire respectively, and relay K5 normally open contact end and switching circuit's signal input end relay K4 positive power input end are connected through the wire. The negative electrode of the standby storage battery G is connected with the negative electrode power supply input end of the switching circuit relay K4 and the negative electrode power supply input end of the control circuit through NPN triode Q2 emitters through leads; the power output end of the wind driven generator M, the power output end of the diesel generator M1 matched with the wind driven generator and two normally closed contact ends and two normally open contact ends of two signal input end relays K4 of the switching circuit are respectively connected through leads; two control power supply input ends of a power supply output end relay K4 of the switching circuit are respectively connected with two power supply input ends of a yaw control system SF matched with the wind driven generator through leads; two contacts under a starting power switch QD (one end of the two contacts under the starting power switch QD is connected with the positive power input end of a starting motor matched relay of the diesel engine, and the other end of the two contacts is connected with the positive electrode of a starting storage battery of the diesel engine), and two contacts under an extinction power switch XH (one end of the two contacts under the extinction power switch XH is connected with the positive electrode of the starting storage battery of the diesel engine, and the other end of the two contacts is connected with the positive power input end of an extinction electromagnetic valve of the diesel engine) are respectively connected with a control contact end and a normally open contact end of a relay K2 and a control contact end and a normally open contact end of a relay K3.

As shown in fig. 1, 2 and 3, when yaw wind is not generated on site during the power generation of the wind driven generator M, the small-sized ac generator M2 does not generate power, the relay K4 is in a power-off state, and two control power input ends thereof are respectively closed with two normally closed contact ends, so that the power of the wind driven generator M can respectively enter two power input ends of a yaw control system SF of the wind driven generator M through the two control power input ends and the two normally closed contact ends of the relay K4, and thus, the yaw control system SF is in a power-on working state, and when the diesel generator M1 is not started, the yaw control system SF can be in a normal working state. At ordinary times, the wind driven generator M generates power to supply power to a power grid, and simultaneously outputs power to enter the power input two ends 1 and 2 pins of the switching power module A4, so that the

pins

3 and 4 of the switching power module A4 can output stable power of about 12.7V to float and charge the storage battery G under the action of the internal circuit of the switching power module A4, and the storage battery G is guaranteed to have sufficient electric energy and cannot be damaged due to overcharge. After the power supply output by the storage battery G enters the direct-current power supply input end of the detection circuit, the detection circuit is in a power-on working state. After the detection circuit works by electrifying, when a wind driven generator generates side wind compared with the rear side end and the left and right side ends of the blades of the wind driven generator on the power generation site, the direction plate 105 of the alternating current wind driven generator M2 can be caused to rotate, because the small alternating current wind driven generator M2 is vertically arranged on the fixed plate 101, the direction plate 105 of the alternating current wind driven generator can be blown by non-downwind blown in any direction to move for a certain distance, then the rotating shaft of the alternating current wind driven generator M2 drives the rotor to rotate, the alternating current wind driven generator M2 generates electric energy higher than 6V, and the electric energy enters the power input two ends 1 and 2 of the DC-DC power module A5; under the action of the internal circuit of the DC-DC power module a5, its

pins

3 and 4 will output stable DC power into pins 2 and 3 (adjustable resistor R P1 step-down current-limiting) of the three-terminal voltage integrated monitoring circuit a. Because the input voltage is higher than 4.75V, under the action of the internal circuit of the three-terminal voltage integrated monitoring circuit A, the pin 1 of the three-terminal voltage integrated monitoring circuit A can output a high level, the high level is subjected to voltage reduction and current limitation through the resistor R2 and enters the base electrode of the NPN triode Q, the NPN triode Q is conducted with the collector, the low level is output and enters the negative power supply input end of the relay K, and then the relay K is electrified to attract the control power supply input end and the normally open contact end to be closed. Because the time controller A1 is in the power-on state and 3 pins are connected with the normally open contact end of the relay K, at this moment, under the action of the internal circuit of the time controller A1 and the action of the time of outputting power by 4 pins and 5 pins set by technicians, the 4 pins and 5 pins can output power for 8 minutes to enter the two input ends of the power supply of the relay K5, so that the input end of the control power supply and the normally open contact end of the relay K5 are closed in power-on pull-in within 8 minutes, and the input end of the control power supply and the normally closed contact end are open (when yaw wind does not occur on site, the input voltage is lower than 4.75V, the pin 1 of the three-terminal voltage integrated monitoring circuit A does not output high level, and the relays K and K5 cannot be in power-. Because the positive power input end of the first set of time control switch A2 is connected with the normally open contact end of the relay K5 through the control power input end and the normally closed contact end of the relay K1, and the positive power input end of the second set of time control switch A3 is connected with the normally closed contact end of the relay K5, when no yaw wind occurs on site, the second set of time control switch A3 can be powered on to work, and when the yaw wind occurs on site, the first set of time control switch A2 can be powered on to work for 8 minutes.

As shown in fig. 1, 2 and 3, yaw wind occurs on site, the first set of time control switch a2 works when powered on for 8 minutes, the first set of time control switch a2 outputs 5 seconds of power supply first in 8 minutes under the action of its internal circuit and the action of 3 and 4 feet of power supply output time set by technicians, and then outputs 5 seconds of power supply to the two ends of the power supply input of the relay K2 every 5 seconds, so that the relay K2 is powered on and closed for 5 seconds every 5 seconds, and the control contact end and the normally open contact end are closed for 5 seconds every 5 seconds. Because two contacts under the starting power switch QD of the diesel generator are respectively connected with the control contact end and the normally open contact end of the relay K2, after the 3 and 4 pins of the time control switch A2 output power, the two contacts under the starting power switch QD of the diesel generator are firstly closed for 5 seconds, which is equivalent to 5 seconds when the starting power switch is opened by hands, and then closed (opened and closed) for 5 seconds every 5 seconds. Thus, under the action of the diesel starter motor of the diesel generator, the diesel engine is started for 5 seconds, and then is started for 5 seconds every 5 seconds until the diesel engine is started (in practical cases, the diesel engine is not started any more after being started). The diesel engine is started to drive the diesel generator M1 to generate electricity to generate electric energy. Because the positive pole of the 12V power supply can enter the input end of the positive pole power supply of the relay K4 when the 1 pin of the time control switch A2 is electrified for 8 minutes, the relay K4 can be electrified to attract the two input ends of the control power supply and the two normally open contact ends to be respectively communicated within 8 minutes. Therefore, a power supply sent by the diesel generator M1 can enter two power supply input ends of a yaw control system SF matched with the wind driven generator M through two control power supply input ends and two normally open contact ends of a relay K4, so that the yaw control system SF is in an electrified working state, and the yaw control system SF is in a normal working state when yaw wind occurs on site and the wind driven generator M cannot normally generate electricity. When the diesel generator M1 is started, the heat of exhaust gas discharged from the exhaust pipe of the diesel engine acts on the temperature switch WK through the outer side of the middle part of the exhaust pipe, and after a certain time (about 10 seconds) when the temperature of the outer side of the middle part of the exhaust pipe rises to 80 ℃, two contacts inside the temperature switch WK are closed, so that the anode of a 12V power supply can be subjected to voltage reduction and current limitation through the temperature switch WK and the resistor R which are closed, and the electrolytic capacitor C2 is charged. When the diesel engine is not started effectively and the temperature of the outer side of the middle part of the exhaust pipe is lower than 80 ℃, two contacts in the temperature switch WK are opened, so that the anode of the 12V power supply can not charge the electrolytic capacitor C2. When the temperature of the outer side of the middle part of the exhaust pipe rises to 80 ℃, the 12V power supply is subjected to voltage reduction and current limitation through the temperature switch WK and the resistor R with the closed contacts to charge the electrolytic capacitor C2, and when the electrolytic capacitor C2 is just charged, because the electricity of the electrolytic capacitor C2 is not full, the base voltage of the 12V power supply entering the NPN triode Q2 after the positive pole of the 12V power supply is subjected to voltage reduction and current limitation through the resistor R, R1 is lower than 0.7V, so that the NPN triode Q2 is in a cut-off state, the relay K1 is continuously de-energized, the positive pole of the 12V power supply is continuously supplied with power through the relay K1 to control the power supply input end and the. After charging for about 10 seconds, when the electrolytic capacitor C2 is fully charged, the voltage of the base electrode of the NPN triode Q2 is higher than 0.7V after the 12V power supply positive electrode is subjected to voltage reduction and current limitation through the resistor R, R1, then the NP N triode Q2 is in a conducting state, the relay K1 is electrified to control the power supply input end and the normally closed contact end to be open, the 12V power supply positive electrode does not control the power supply input end through the relay K1, the normally closed contact end supplies power to the time control switch A2, the time control switch A2 and the relay K2 lose power successively, and the diesel engine stops starting. Through the action of all the circuits, when yaw wind occurs on site, the diesel engine of the diesel engine generator M1 can be automatically started, and can be automatically stopped after the diesel engine generator M1 is started, and the diesel engine generator M1 continues to operate to generate electricity to supply power to the yaw control system SF, so that the yaw control system SF can be ensured to be in a stable working state. After 8 minutes, the relay K5 and the first set of time control switch A2 matched with the time controller A1 are in a power-off state, the circuit returns to an initial state, and the diesel generator is ready to be started when yaw wind occurs next time.

As shown in fig. 1, 2 and 3, when yaw wind occurs on site and the diesel generator M1 generates power within about 8 minutes, the yaw control system SF drives the nacelle of the wind turbine M to rotate around the center line of the upper end of the tower of the wind turbine through its controller, so as to ensure that the blades and the changed wind direction keep in a downwind state, and further ensure that the wind turbine M is in a normal working state. After 8 minutes, when the relay K5 loses power and the control power supply input end and the normally closed contact end are closed, and the second set of time control switch A3 is powered on to work, under the action of the internal circuit of the second set of time control switch A3 and the action of the power supply output time of 3 and 4 pins set by a technician, the 3 and 4 pins can output 5 seconds of power supply, and then the relay K3 is powered on to pull in the control power supply input end and the normally open contact end to be closed for 5 seconds. Because the two ends of the power input of the diesel engine flameout power switch XH of the diesel engine generator are respectively connected with the control contact end and the normally open contact end of the relay K3, after the 3 and 4 pins of the time control switch A3 output power, two contacts under the flameout power switch XH of the diesel engine can be closed for 5 seconds, which is equivalent to 5 seconds in total when the flameout power switch XH is opened by hands, so that the diesel engine of the diesel engine generator can be flameout, and the diesel engine generator M1 can not generate electric energy any more; and the power supply of the wind driven generator M is recovered to enter two power supply input ends of a matched yaw control system SF of the wind driven generator M through two control power supply input ends and two normally closed contact ends of a relay K4, and the yaw control system SF is in a normal working state. In the circuit, relays K, K1, K2, K3, K4 and K5 are DC12V direct-current relays; the resistances of the resistors R2 and R, R1 are 47K, 0.96M and 470K respectively; the model of the adjustable resistor RP1 is 100 omega; the model of the electrolytic capacitor C2 is 4.7 mu F/25V; the model number of the NPN triode Q, Q2 is 9013; the temperature switch SK is a 80 ℃ kick type temperature switch finished product of a model KSD 301.

The basic principles and essential features of the invention and the advantages of the invention have been shown and described above, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, the embodiments do not include only one independent technical solution, and such description is only for clarity, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic power supply control device of a wind driven generator yaw system comprises an alternating current wind driven generator and a storage battery, and is characterized by also comprising a switching circuit, a charging circuit, a detection circuit and a control circuit; a connecting rod is transversely arranged at the upper end of a rotating shaft of the alternating-current wind driven generator, a direction plate is arranged at one side end of the connecting rod, a bearing is arranged at the other side of the connecting rod, a fan blade is sleeved on the outer ring of the bearing, a supporting rod is arranged at the side end of a supporting column of the wind driven generator, and the alternating-current wind driven generator is vertically arranged on the supporting; the storage battery, the switching circuit, the charging circuit, the detection circuit and the control circuit are arranged in the element box; the power output end of the wind driven generator is electrically connected with the power input end of the charging circuit, and the power output end of the charging circuit is electrically connected with the power input end of the storage battery; the power output end of the alternating current wind driven generator is electrically connected with the alternating current power input end of the detection circuit; the power supply output end of the storage battery is electrically connected with the direct-current power supply input end of the detection circuit, and the three signal output ends of the detection circuit are respectively and electrically connected with the two signal input ends of the control circuit and the signal input end of the switching circuit; the negative electrode of the storage battery is electrically connected with the switching circuit and the negative power supply input end of the control circuit; the power supply output end of the wind driven generator, the power supply output end of the diesel generator matched with the wind driven generator and the two signal input ends of the switching circuit are respectively and electrically connected; the power output end of the switching circuit is electrically connected with the power input end of a yaw control system matched with the wind driven generator; and the starting power switch and the flameout power switch of the diesel generator are respectively and electrically connected with the two control signal output ends of the control circuit.

2. The automatic power supply control device for the yawing system of a wind driven generator according to claim 1, wherein the switching circuit is a relay.

3. The automatic power supply control device of the wind driven generator yaw system according to claim 1, wherein the charging circuit is an ac-to-dc switching power supply module.

4. The automatic power supply control device of the wind driven generator yaw system as claimed in claim 1, wherein the detection circuit comprises a three-terminal voltage integrated monitoring circuit model A N051A, a resistor, a relay, an adjustable resistor, an NPN triode, a DC-DC power supply module and a time controller which are connected through a circuit board, wherein the positive power supply output terminal 3 pin of the DC-DC power supply module is connected with one end of the adjustable resistor and the positive power supply input terminal of the first relay, the positive power supply input terminal 2 pin of the three-terminal voltage integrated monitoring circuit is connected with the other end of the adjustable resistor, the output terminal 1 pin of the three-terminal voltage integrated monitoring circuit is connected with one end of the resistor, the other end of the resistor is connected with the NPN base of the triode, the collector of the NPN triode is connected with the negative power supply input terminal of the first relay, the negative power supply input terminal 3, The negative power output end 4 pins of the DC-DC power module and the negative power input end 2 pins of the time controller are connected, the control power input end of the first relay, the control power input end of the second relay and the positive power input end 1 pin of the time controller are connected, and the power output ends 3 and 4 pins of the time controller are respectively connected with the positive and negative pole power input ends of the second relay.

5. The automatic power supply control device of the yawing system of the wind driven generator as claimed in claim 1, wherein the control circuit comprises a time control switch, a temperature switch, an electrolytic capacitor, a resistor, an NPN triode and a relay, which are connected through a circuit board, the time control switch comprises two sets, the negative power input ends of the first set and the second set of the time control switch are connected with the negative electrode of the electrolytic capacitor and the emitter of the NPN triode, the two power output ends of the second set of the time control switch are respectively connected with the two power input ends of the second relay, the two power output ends of the first set of the time control switch are respectively connected with the two power input ends of the first relay, the normally closed contact end of the third relay is connected with the positive power input end of the first set of the time control switch, the control power input end of the third relay is connected with one end of the temperature switch, and, The other end of the first resistor is connected with the anode of the electrolytic capacitor, one end of the second resistor is connected with the base of the NPN triode, the collector of the NPN triode is connected with the power input end of the cathode of the third relay, and the temperature switch is installed on the outer side of the diesel engine exhaust pipe of the diesel generator.