JP2005130648A - Generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To protect a storage means by preventing the overcurrent of the storage means even if power fed from a generation means is not stabilized. <P>SOLUTION: This generator comprises a wind turbine generator body 1 that generates power, a battery 4 that stores the power, an inverter 5 that outputs the power stored in the battery 4 to an external load 6 or stops the output, and an inverter control unit 46 that controls the inverter 5. The inverter control unit 46 stope the output of the power to the external load 6 when the voltage of the power generated by the wind turbine generator body 1 is not higher than a prescribed value. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a power generation device that generates electric power.

  2. Description of the Related Art A power generation device that generates electric power using natural energy such as hydropower, wind power, and sunlight is known. Such a power generator generally includes a generator (power generation means) for generating electric power and a battery (power storage means) for storing electric power generated by the generator. Is. By storing the power generated by the generator in the battery, stable power can be supplied even when the power supplied from the generator is unstable.

Japanese Patent Laid-Open No. 2003-21046

  However, natural energy is extremely unstable energy, and power may not be supplied from the generator for a long time, or the electric power that can be obtained from natural energy may not be sufficient for the external load. . In such a case, if power is continuously supplied to the external load, there is a problem that the battery overdischarges, stops the scientific reaction, and shortens the battery life.

  Therefore, the main object of the present invention is to protect the power storage means by preventing overdischarge of the power storage means even when the power supplied from the power generation means is unstable.

Means and effects for solving the problems

  The power generation device according to the present invention includes a power generation unit that generates power, a power storage unit that stores the power generated by the power generation unit, and outputs the power stored in the power storage unit to an external load, or Output means for stopping the output, voltage detection means for detecting the voltage of the electric power generated by the power generation means, and control means for controlling the output means, the control means comprising the voltage detection means When the voltage detected by the above is less than or equal to a predetermined value, the output control means stops the output of power to the external load.

  According to the present invention, it is possible to prevent overdischarge of the power storage means by stopping the output of the power when the voltage of the power generated by the power generation means is not sufficient. As a result, the power storage means can be protected.

  The power generation device of the present invention may further include power storage detection means for detecting the amount of power stored in the power storage means. At this time, when the voltage detected by the voltage detection means is less than or equal to a predetermined value, and when the amount of power detected by the power storage detection means is less than or equal to a predetermined value, the control means It is preferable that the output of electric power to the external load is stopped by the means. According to this, within the range of the amount of power stored in the power storage means, it is possible to supply stable power to the external load while preventing overdischarge of the power storage means.

  In the power generation apparatus of the present invention, the power generation means may generate electric power by converting kinetic energy that rotates the rotating shaft into electric power. At this time, it is preferable that the voltage detection means detects a voltage based on the number of rotations of the rotating shaft. According to this, the electric power produced | generated by the electric power generation means can be detected easily and cheaply.

  In the power generation device of the present invention, the rotating shaft of the power generation means may be rotated by wind power. According to this, even in wind power generation where the generated power is unstable, overdischarge of the power storage means can be prevented.

  The power generator of the present invention may further include an inverter that converts the power stored by the power storage unit into power having a specific wavelength and outputs the power to the external device. At this time, the output means is preferably included in the inverter. According to this, when an inverter is provided, it is not necessary to provide a separate output means.

  In the present invention, the control means preferably stops after a predetermined time has elapsed when stopping the output of power to the external load. According to this, the user can prepare for the stop of the output of electric power.

  In the present invention, there may be further provided storage means for storing the operation content of the control means. At this time, the control means stops output of electric power to the external load when the voltage detected by the voltage detection means is equal to or lower than a predetermined value based on the operation content stored in the storage means. It is preferable to selectively perform whether or not. According to this, it is possible to select whether or not to stop the output of power when the power generated by the power generation means is not sufficient.

  The power generation device of the present invention may further include an operation unit that rewrites the storage content of the storage unit based on a user operation. According to this, the user can easily change whether or not to stop the output of power when the power generated by the power generation means is not sufficient.

  In the present invention, the number of rotations of the rotating shaft of the power generation means, the power generated by the power generation means, the amount of power stored in the power storage means, the current of power stored in the power storage means, It is preferable to include a display unit that displays at least one of the current of power consumed by the external load and the stored contents stored in the storage unit. According to this, the user can confirm the state of the power generation device.

An embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the power supply device according to the present embodiment is mounted on a wind turbine generator. The wind power generation apparatus converts wind energy, which is a kind of natural energy, into AC power composed of electric energy and outputs it, and the control function of the wind power generation apparatus main body 1 and the rectification of AC power into DC power. A controller 2 having a function and the like, an operation indicator 3 that displays the operation state and setting state of the wind turbine generator in a switchable manner, a battery (power storage means) 4 that charges DC power rectified in the controller 2, It has an inverter (including output means) 5 that converts electric power charged in the battery 4 into AC power and supplies it to an external load 6, and an auxiliary charger 7 that supplies auxiliary power to the battery 4.

  As shown in FIG. 2, the wind power generator main body 1 includes a windmill 11 that generates a rotational driving force according to wind power. The windmill 11 includes a plurality of windmill blades 12 that receive wind, a turning support member 13 that supports the windmill blades 12 to turn in the horizontal direction, and a rotation support mechanism 14 that supports the rotation center of the turning support member 13. And have. The rotation support mechanism 14 is erected in the vertical direction, and includes a first rotation shaft member 15 having an upper end connected to the rotation center of the turning support member 13, and a rotation shaft clutch 16 connected to the first rotation shaft member 15. And a second rotary shaft member 17 connected to each other.

  The first rotation shaft member 15 is provided with a rotation speed detector (voltage detection means) 18. The rotational speed detector 18 is composed of an encoder, and outputs a rotational speed signal having a pulse number corresponding to the rotational speed (the rotational speed per unit time) of the first rotary shaft member 15 to a rotational speed input unit 41 described later. It is like that. The rotation speed detector 18 is configured to attach a detection object such as a magnet or a reflector to the side surface of the turning support member 13 and output a pulsed rotation speed signal each time this detection object is detected. May be.

  The rotary shaft clutch 16 interposed between the rotary shaft members 15 and 17 has a non-excitation operation type configuration. Specifically, the rotary shaft clutch 16 has two clutch plates 16a and 16a, a spring member (not shown) that urges the clutch plates 16a and 16a to join each other, and an urging force of the spring member. And a coil member 16b that generates electromagnetic force in the direction. Thereby, when the clutch operating current is not supplied, the clutch plates 16a and 16a are firmly joined (connected) by the biasing force of the spring, so that the rotational driving force of the first rotating shaft member 15 is reduced to the second. The rotation shaft member 17 is sufficiently transmitted. In addition, when the clutch operating current is supplied, the action of the urging force is reduced by the electromagnetic force corresponding to the current value, thereby weakening the joining force between the clutch plates 16a and 16a, and the electromagnetic force is more than the urging force. When this happens, the clutch plates 16a and 16a are separated from each other.

  The second rotating shaft member 17 to which the rotational driving force is transmitted via the rotating shaft clutch 16 is provided with a generator (power generation means) 19 such as a three-phase alternating current system. The generator 19 outputs AC power corresponding to the rotation speed of the second rotating shaft member 17. A short-circuit braking device 21 is connected to the output side of the generator 19. The short-circuit braking device 21 has a short-circuit relay 22 connected to each terminal of the generator 19. The short-circuiting relay 22 opens the switch part by energization from the controller 2 and closes the switch part when the energization from the controller 2 is stopped. The output side of 19 is short-circuited. As a result, the short-circuit braking device 21 brakes the rotation of the rotation support mechanism 14 by the windmill blade 12 by generating a large load on the generator 19.

  Further, a stop device 20 for fixing the rotation support mechanism 14 by manual operation is provided at the lower end portion of the second rotation shaft member 17. The stopping device 20 includes an annular member 20a attached to the second rotating shaft member 17, and a pressing member 20b provided on the outer peripheral surface of the annular member 20a so as to be able to contact and separate. A part of the pressing member 20b is installed on a fixed part such as a gantry or a site surface (not shown). Then, the stop device 20 fixes the second rotating shaft member 17 with a large braking force by manually pressing the pressing member 20b against the annular member 20a, and as a result, completely stops the rotation of the rotation support mechanism 14. It has become. Note that the stopping device 20 may be configured to automatically operate in accordance with an operation instruction of the operation indicator 3 described later.

  The wind turbine generator 1 configured as described above is connected to a controller 2. As shown in FIG. 1, the controller 2 includes a control unit 31 that controls the wind turbine generator, and a rectifier 32 that rectifies AC power output from the generator 19 of the wind turbine generator body 1 into DC power. ing. The control unit 31 includes a rotation speed input unit 41, a clutch drive unit 42, and a short circuit drive unit 43. Each of these parts 41 to 43 is connected to the rotational speed detector 18, the rotary shaft clutch 16, and the short-circuit braking device 21 in the wind power generator main body 1 described above.

  The rotational speed input unit 41 has a function of converting the rotational speed signal from the rotational speed detector 18 into a signal form suitable for signal processing. The clutch drive unit 42 controls the operating state of the rotary shaft clutch 16 by outputting a clutch drive signal to the rotary shaft clutch 16, that is, the first rotary shaft member 15 and the second rotary shaft member 17 in FIG. It has a function to control so as to weaken or cancel the coupling force. The short-circuit drive unit 43 has a function of causing the generator 19 to be in a short-circuit state when an abnormality occurs by outputting a drive signal to the short-circuit relay 22 of the short-circuit braking device 21 during normal operation.

  The controller 2 includes an auxiliary charging operation unit 44, a charging control driving unit 45, an inverter control unit 46, and an operation display input / output unit 47, and an arithmetic processing unit 51 that monitors and controls each of the units 41 to 47. have. Details of the arithmetic processing unit 51 will be described later.

  The auxiliary charging operation unit 44 is connected to an auxiliary charger 7 called a DC power pack that charges the battery 4 with auxiliary power. The auxiliary charger 7 is detachably connected to a commercial or industrial power supply 71 and the battery 4. The auxiliary charger 7 stores the electric power supplied from the power source 71 and supplies the stored electric power to the battery 4 to charge the battery 4 in an auxiliary manner.

  The battery 4 supplementarily charged by the auxiliary charger 7 is also connected to the rectifying unit 32 of the controller 2 as shown in FIG. The rectification unit 32 is configured to convert AC power from the generator 19 of the wind power generator main body 1 into DC power and charge the battery 4.

  That is, as shown in FIG. 2, the rectifying unit 32 includes a bridge diode 33 connected to the generator 19, a charging capacitor 34 connected in parallel to the anode side and the cathode side of the bridge diode 33, and a charging capacitor 34. A diode 35 connected in parallel in the same direction as the bridge diode 33 on the downstream side, a charge control unit 36 provided between the charging capacitor 34 and the diode 35 for switching between current passage and interruption, and a diode 35 and a coil 37 provided on the downstream side of 35. The charge control unit 36 includes a semiconductor switch such as a transistor, and is connected to the charge control drive unit 45 of FIG. The charge control drive unit 45 controls the energization time from the bridge diode 33 to the diode 35 by outputting a charge control signal. The rectifying unit 32 configured as described above is connected to the battery 4 and the inverter 5, and charges the battery 4 with the power of the charging voltage corresponding to the energization time controlled by the charging control unit 36. ing.

  Further, as shown in FIG. 1, the rectifying unit 32 includes a generator voltage detector 38 that detects a generator voltage of AC power input from the generator 19, a charging voltage (battery voltage) that charges the battery 4, It has a storage state detector (storage detection means) 39 for detecting the charging current and the charging power charged in the battery 4. Note that the rotation speed of the rotation support mechanism 14 also indicates fluctuations in the voltage of the power generated by the generator 19. That is, during normal power generation, it is substantially equal to the generator voltage detected by the generator voltage detector 38. The generator voltage detector 38 and the storage state detector 39 are connected to the arithmetic processing unit 51 and output the detected information to the arithmetic processing unit 51, respectively.

  In addition, the inverter control unit 46 connected to the arithmetic processing unit 51 is connected to the inverter 5 in the same manner as the charge control drive unit 45 described above, and controls the operation of the inverter 5 and detects the operation state. . The inverter 5 converts the DC power charged in the battery 4 into, for example, household AC power and outputs it to the external load 6, and has a power generation unit and a power output unit (not shown). The power generation unit converts the input DC power into AC power having a predetermined frequency to generate power. The power output unit is for outputting the electric power generated by the power generation unit to the external load 6 and operates in accordance with an instruction from the inverter control unit 46 in the present embodiment. Further, the inverter 5 outputs the voltage value and current value of the power supplied to the external load 6 to the inverter control unit 46 as its own operating state.

  Further, the operation display input / output unit 47 connected to the arithmetic processing unit 51 is detachably connected to the operation display 3.

  Here, the operation indicator 3 will be described. As shown in FIG. 3, the operation indicator 3 includes a display unit 61 such as a 7-segment LED or LCD, a reset switch 62, and a display changeover switch (operation means) 63. The display unit 61 is configured to display the operating state of the wind turbine generator using characters and numerical values. The operating state refers to the rotation speed (wind speed) of the rotation support mechanism 14 obtained by the rotation speed input unit 41, the generator voltage detected by the generator voltage detector 38, and the charge detected by the storage state detector 39. Voltage (battery voltage) and other operating states. The reset switch 62 is for resetting the operation indicator 3.

  The display changeover switch 63 is set so that the display of the operation state on the display unit 61 can be changed manually. The displayed operating state is detected by the rotation speed of the rotation support mechanism 14 (the number of rotations in the figure), the generator voltage (the generated voltage in the figure), the charging voltage (the battery voltage in the figure), and the inverter 5. There is a load current which is a current supplied to the external load 6. These operation states are sequentially switched each time the display changeover switch 63 is pressed and displayed on the display unit 61. In FIG. 3, the generator voltage is displayed. Moreover, it has shown that 100V output to the external load 6 is ensured (100V output in the figure).

  In addition, the display changeover switch 63 outputs the output of the inverter 5 by the inverter control unit 46 when the standard mode (mode 0) in which the output of the inverter 5 is always maintained and the rotation speed of the rotation support mechanism 14 is equal to or lower than the set value. And an interval power saving mode (mode 2) in which the output of the inverter 5 is stopped by the inverter control unit 46 after a certain time has elapsed after the rotation speed of the rotation support mechanism 14 becomes lower than the set value. Is set to be switchable by manual operation. By pressing the display changeover switch 63 for 5 seconds or longer, the modes are switched in order. The set contents are stored in a storage unit (not shown).

  Further, the operation display 3 has a control unit including a calculation unit, a storage unit, and the like (not shown). The control unit has a function of communicating with the controller 2 in the form of a program in addition to the function of controlling the operation indicator 3 itself. Each function in the operation indicator 3 may be formed in a hardware form instead of the software form of the program.

  The arithmetic processing unit 51 of the controller 2 also has an arithmetic unit and a storage unit (not shown), and has various functions for controlling the wind turbine generator in the form of a program. Each function may be formed in a hardware form instead of the software form of the program.

  That is, the arithmetic processing unit 51 has an auxiliary charging processing function, an abnormal operation braking function, a rotation speed increasing function, a low voltage charging function, a battery protection function, and the like. The auxiliary charging processing function monitors the charging voltage detected by the storage state detector 39, and permits charging of auxiliary power to the battery 4 by the auxiliary charger 7 when the charging voltage becomes less than the first predetermined value. It is a function to do. The abnormal operation braking function enables the AC power of the generator 19 to be supplied to the bridge diode 33 by energizing the short-circuiting relay 22 of the short-circuit braking device 21 during the normal operation, and the energization is stopped due to the abnormal operation. This function sometimes causes the generator 19 to generate a braking force by short-circuiting the output of the generator 19. The rotation speed increasing function releases the connected state of the rotary shaft clutch 16 and allows only the first rotary shaft member 15 to rotate when the rotational speed of the rotation support mechanism 14 becomes less than the second predetermined value due to a decrease in wind power. Thus, when the rotational speed of the first rotary shaft member 15 is increased to a certain level or higher, the connected state of the rotary shaft clutch 16 is recovered. The low voltage charging function performs charge control to switch the charging control unit 36 between the ON state and the OFF state when the rotation speed of the rotation support mechanism 14 is equal to or higher than a third predetermined value, and the rotation speed is reduced to less than the third predetermined value. This is a function of maintaining the charging control unit 36 in the ON state when the charging is performed. The battery protection function is a function for preventing overdischarge of the battery 4, and the power output unit of the inverter 5 is turned on / off based on the rotation speed of the rotation support mechanism 14 in accordance with each operation mode stored in the storage unit. This is a function to control OFF.

In the above configuration, the operation of the wind turbine generator will be described.
When the general operation is stopped, as shown in FIG. 2, the energization of the non-excitation operation type rotary shaft clutch 16 is stopped, whereby the rotary shaft clutch 16 is brought into a firm connection state. Thereby, the first rotating shaft member 15 and the second rotating shaft member 17 of the rotation support mechanism 14 are integrated by the rotating shaft clutch 16. In addition, when the energization of the short-circuit braking device 21 to the short-circuit relay 22 is stopped, the generator 19 is short-circuited. As a result, a large load is required for the operation of the generator 19. As a result, even when a large rotational driving force is applied to the rotation support mechanism 14 by the wind, the larger the load is controlled against the rotation of the rotation support mechanism 14 as the rotation support mechanism 14 rotates and operates the generator 19 at a high speed. By acting as power, high-speed rotation of the rotation support mechanism 14 is prohibited.

  Furthermore, the brake force in the stop device 20 is generated at the time of special operation stop such as during a strong wind or inspection. Then, by fixing the second rotating shaft member 17 of the rotation support mechanism 14, the rotation of the rotation support mechanism 14 is completely stopped.

  Next, during operation, the operation indicator 3 is connected to the controller 2 as necessary, and then the controller 2 and the operation indicator 3 are powered on. In the controller 2, energization of the rotary shaft clutch 16 is started. Thereby, the connection state of the rotating shaft clutch 16 is released, and the first rotating shaft member 15 is disconnected from the second rotating shaft member 17. As a result, the first rotating shaft member 15 is in a state of being rotatable with respect to the second rotating shaft member 17, so that the first rotating shaft member 15 rapidly rotates even if the windmill blade 12 is hit by a weak wind. Can be increased. In addition, when the short-circuit braking device 21 is energized, the short-circuit state of the generator 19 is released, and the AC power generated by the generator 19 can be supplied to the controller 2. On the other hand, on the operation indicator 3, the operation state of the control unit 31, that is, the rotational speed of the first rotary shaft member 15, for example, is displayed as a numerical value.

  Next, the controller 2 operates in the arithmetic processing unit 51 so as to exhibit an auxiliary charging processing function, an abnormal operation braking function, a rotation speed increasing function, a low voltage charging function, a battery protection function, and the like.

(Rotation speed increasing function)
Specifically, the rotational speed of the first rotating shaft member 15 is monitored. Then, when the rotation speed becomes equal to or higher than the rotation speed obtained by adding a constant value to the second predetermined value, the energization to the rotation shaft clutch 16 is stopped, whereby the connected state of the rotation shaft clutch 16 is recovered. As a result, the inertia of the first rotating shaft member 15 acts, so that the rotation support mechanism 14 including the first rotating shaft member 15 and the second rotating shaft member 17 rotates at a relatively high speed. Then, the rotational driving force of the rotation support mechanism 14 operates the generator 19, and high voltage AC power is supplied to the controller 2.

  In addition, when the wind is weak, the rotation speed of the rotation support mechanism 14 decreases due to a load when the generator 19 is operated. When the rotational speed decreases below the second predetermined value, the energization of the rotary shaft clutch 16 is resumed, the connected state of the rotary shaft clutch 16 is released, and only the first rotary shaft member 15 is allowed to rotate. Then, even when the wind is weak, the first rotary shaft member 15 can be accelerated in a short time, and when the rotational speed is increased to a certain level or higher, the connected state of the rotary shaft clutch 16 is recovered, The power generation of the generator 19 is resumed. Thereby, even in the case of a weak wind, high-voltage AC power can be intermittently supplied to the controller 2.

(Low voltage charging function)
The AC power supplied to the controller 2 as described above is full-wave rectified by the bridge diode 33, smoothed by the smoothing circuit including the charging capacitor 34, the diode 35, and the coil 37, and charged to the battery 4. . Then, the power charged in the battery 4 is used as a power source for the controller 2, and after being converted into AC power by the inverter 5, it is used as a power source for the external load 6.

  At this time, the charging voltage and charging current charged in the battery 4 are controlled by the charging control unit 36. That is, when the rotation speed of the rotation support mechanism 14 is equal to or higher than the third predetermined value, it is determined that the charging is performed with a charging voltage that is significantly higher than the rated voltage of the battery 4, and the charging control is performed so as to decrease the charging voltage. Charging control is performed to switch the unit 36 between the ON state and the OFF state. On the other hand, when the rotation speed falls below the third predetermined value, it is determined that the battery 4 is charged with a charging voltage close to the rated voltage of the battery 4, and the charging control unit 36 is charged so as to charge the battery 4 with a large charging current. Is controlled to maintain the ON state.

(Auxiliary charging processing function)
Further, during charging of the battery 4, the charging voltage detected by the storage state detector 39 is monitored. When the charging voltage becomes less than the first predetermined value, charging of auxiliary power to the battery 4 by the auxiliary charger 7 is permitted.

(Abnormal driving braking function)
Further, as shown in FIG. 2, when the wind turbine generator is operating normally, the short-circuit relay 22 of the short-circuit braking device 21 is opened by energization. Then, the AC power of the generator 19 is supplied to the rectifying unit 32 such as the bridge diode 33 and the battery 4 is charged. On the other hand, when the controller 2 is urgently stopped due to an abnormality such as wear or damage of parts, all signal outputs being output to the wind turbine generator 1 and the like are stopped. As a result, energization of the short-circuit braking device 21 to the short-circuit relay 22 is stopped, and the generator 19 is short-circuited.

  When the energization of the rotary shaft clutch 16 is stopped, the rotary shaft clutch 16 is a non-excitation operation type, and the clutch plates 16a and 16a are brought into a firm connection state. Thereby, the first rotating shaft member 15 and the second rotating shaft member 17 of the rotation support mechanism 14 are integrated by the rotating shaft clutch 16. And the rotational speed of the rotation support mechanism 14 is rapidly decelerated by the big load by the generator 19 in a short circuit state.

(Battery protection function)
In addition, as described above, the battery protection function has three modes: the standard mode, the power saving mode, and the interval power saving mode, which are set by the display changeover switch 63 of the operation indicator 3 and stored in the storage unit. . If the battery protection function is set to the standard mode (mode 0), the output of the inverter 5 is always maintained. Note that the output of the inverter 5 stops when the battery 4 is overdischarged. If the power saving mode (mode 1) is set, the output of the inverter 5 is stopped by the inverter control unit 46 when the rotation speed of the rotation support mechanism 14 is a set value (for example, 50 rpm) or less. If the interval power saving mode (mode 2) is set, the inverter control unit when the rotation speed of the rotation support mechanism 14 is less than a set value (for example, 50 rpm) and a predetermined time (for example, 1 hour) has elapsed. The output of the inverter 5 is stopped by 46. In the power saving mode and the interval power saving mode, after the output of the inverter 5 is stopped, the rotation support mechanism 14 is maintained at a rotational speed (for example, 50 rpm) or more for a predetermined time (for example, 5 minutes) by a constant wind force. Thus, the output of the inverter 5 is started again. When the battery 4 is fully charged, the output of the inverter 5 is always maintained. Here, the rotational speed of the rotation support mechanism 14 is detected as a voltage reference for the power generated by the generator 19. Therefore, instead of the rotation speed of the rotation support mechanism 14, the generator voltage may be detected, or the charging voltage may be detected.

  Next, the operation procedure of the battery protection function will be described with reference to the flowchart of FIG. In step S101, the rotation speed detector 18 detects the rotation speed of the rotation support mechanism 14. The charging voltage of the battery 4 is determined by the rotation speed of the rotation support mechanism 14. Thereafter, the process proceeds to step S102, and it is determined whether or not one hour or more has elapsed with the rotation speed of the rotation support mechanism 14 being 0 to 50 rpm. When it is determined that one hour or more has not elapsed with the rotation speed of the rotation support mechanism 14 being 0 to 50 rpm (S102: NO), the process proceeds to step S101 again and the above processing is repeated. If it is determined that the rotation speed of the rotation support mechanism 14 is 0 to 50 rpm and one hour or more has not elapsed (S102: YES), the process proceeds to step S103.

  In step S103, it is determined whether or not the mode set in the storage unit is the standard mode (mode 0). If it is determined that the set mode is the standard mode (mode 0) (S102: YES), the output of the inverter 5 is maintained as it is, and the process proceeds to step S101 again. If it is determined that the set mode is not the standard mode (mode 0) (S102: NO), the process proceeds to step S104, and it is determined whether the set mode is the power saving mode (mode 1). When it is determined that the set mode is the power saving mode (mode 1) (S104: YES), the process proceeds to step S106, and the output of the inverter 5 is immediately stopped. When it is determined that the set mode is not the power saving mode (mode 1) (S104: NO), it is determined as the interval power saving mode (mode 2), the process proceeds to step S105, and a predetermined time interval is set. Then, it transfers to step S106 and the output of the inverter 5 is stopped.

  Thereafter, the process proceeds to step S107, and it is determined whether or not 5 minutes or more have elapsed with the rotation speed of the rotation support mechanism 14 being 50 rpm or more. When it is determined that 5 minutes or more have elapsed with the rotation speed of the rotation support mechanism 14 being 50 rpm or more (S107: YES), the process proceeds to step S110. If it is determined that the rotation speed of the rotation support mechanism 14 is not less than 5 minutes when the rotation speed is 50 rpm or more (S107: NO), the process proceeds to step S108 to determine whether the user has performed a reset operation. . Here, the reset operation is an operation of pressing the reset switch 62 of the operation display 3. If it is determined that the user has not performed the reset operation (S108: NO), the process proceeds to step S107 again. When it is determined that the user has performed the reset operation (S108: YES), the process proceeds to step S110. In step S110, the operation mode is set to mode 0 and the output of inverter 5 is turned ON. Thereafter, the process proceeds to step S101 again.

  Here, the various devices of the external load 6 include an electric device such as a controller 2 of the wind power generator and a refrigerator of the external load 6, a photothermal device such as an electric light and an air conditioner, and the like. Natural energy includes energy existing in the natural world, such as wind power, solar cells, water power, and wave power.

  In the embodiment described above, the battery protection function can stop the output of the power when the voltage of the power generated by the generator 19 is not sufficient, thereby preventing the battery 4 from being overdischarged. . Thereby, the battery 4 can be protected.

  In the present embodiment, since the rotation speed detector 18 detects the rotation speed of the rotation support mechanism 14, the electric power generated by the generator 19 can be detected easily and inexpensively.

  Further, the present embodiment is a wind power generation system that causes the generator 19 to generate power by rotating the rotation support mechanism 14 with wind power. However, even in such wind power generation where the generated power is unstable, the battery 4 Overdischarge can be prevented.

  In addition, in the present embodiment, since the power output unit included in the inverter 5 is controlled by the inverter control unit 46, it is not necessary to provide a separate output unit.

  In the present embodiment, in the interval power saving mode (mode 2) of the battery protection function, output of electric power to the external load 6 is stopped after a predetermined time has elapsed after the rotation speed of the rotation support mechanism 14 has decreased. Therefore, the user can be prepared for stopping the output of power.

  Further, in the present embodiment, since the display changeover switch 63 is provided and each mode of the battery protection function can be easily switched, it is possible to flexibly cope with the situation.

  In addition, in the present embodiment, since the rotation speed of the rotation support mechanism 14, the generator voltage, the charging voltage, and the load current can be displayed on the display unit 61, the user can easily check the operation state. Can do.

  In the present embodiment, when the battery 4 is not fully charged in the power saving mode or interval power saving mode of the battery protection function, the output of the inverter 5 is calculated based on the generator voltage obtained from the rotation speed of the rotation support mechanism 14. Although it is the structure which judges whether it stops, the structure which judges whether the output of the inverter 5 is stopped based on the change of the electric energy stored in the battery 4 may be sufficient. According to this, stable electric power can be supplied to the external load 6 while preventing overdischarge of the battery 4.

  Although the present invention has been described based on a preferred embodiment, the present invention can be modified within a range not exceeding the gist thereof. That is, in the present embodiment, it is a configuration for performing wind power generation that obtains electric power by rotating the rotation support mechanism 14 using wind power, but is not limited to such a configuration. The structure which rotates the support mechanism 14 with other energy, such as hydraulic power, and the structure provided with the generator which obtains electric power with the solar cell etc. which do not have the rotation support mechanism 14 may be sufficient.

  In the present embodiment, the inverter 5 is provided, and the power output unit of the inverter 5 is controlled to supply power to the external load 6 connected thereto. However, the present invention is limited to such a configuration. However, the power output unit may be provided separately. At this time, power may be directly supplied from the power output unit to the external load without using an inverter.

  Furthermore, in the present embodiment, the battery protection function includes a standard mode and an interval power saving mode, and these modes can be selectively executed. However, the present invention is not limited to such a configuration. A configuration without any of these modes may be used, or a configuration in which only the power saving mode is executed may be used.

  In addition, in the present embodiment, the operation indicator 3 includes the display unit 61 and each operation state is displayed. However, the present invention is not limited to such a configuration, and other operation states are displayed. You may make it do not display all the operation states.

  In addition, the program for realizing each function in the present embodiment may be written in a read-only manner in the ROM of the storage unit in advance, or a program recorded on a recording medium such as a CD may be read out when necessary and stored in the storage unit. Or may be transmitted via a telecommunication line such as the Internet and written to the storage unit.

  Although the present invention has been described in the preferred embodiments above, the present invention is not so limited. It will be understood that various other embodiments may be made without departing from the spirit and scope of the invention. Furthermore, in this embodiment, although the effect | action and effect by the structure of this invention are described, these effect | actions and effects are examples and do not limit this invention.

It is a block diagram of the wind power generator which is an embodiment of the invention. It is explanatory drawing which shows the whole structure of the wind power generator shown in FIG. It is an external view of the operation indicator 3 shown in FIG. It is a flowchart which shows the operation | movement procedure of the battery protection function by the control part shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wind power generator main body 2 Controller 3 Operation indicator 4 Battery 5 Inverter 6 External load 7 Auxiliary charger 11 Windmill 12 Windmill blade 13 Turning support member 14 Rotation support mechanism 15 1st rotating shaft member 16 Rotating shaft clutch 17 2nd rotating shaft Member 18 Rotational speed detector 19 Generator 20 Stop device 31 Control unit 32 Rectifier 33 Bridge diode 34 Charging capacitor 35 Diode 36 Charge controller 37 Coil 38 Generator voltage detector 39 Storage state detector 41 Input unit 42 Clutch drive unit 43 Short-circuit drive unit 44 Auxiliary charge operation unit 45 Charge control drive unit 46 Inverter control unit 47 Operation display input / output unit 61 Display unit 62 Reset switch 63 Display changeover switch 71 Power supply 80 Auxiliary charger

Claims (10)

Power generation means for generating electric power;
Power storage means for storing power generated by the power generation means;
Output power stored in the power storage means to an external load, or output means for stopping the output;
Voltage detection means for detecting the voltage of the power generated by the power generation means;
Control means for controlling the output means,
The control means stops the output of electric power to the external load by the output control means when the voltage detected by the voltage detection means is not more than a predetermined value. A power storage detecting means for detecting the amount of power stored in the power storage means;
When the voltage detected by the voltage detection means is less than or equal to a predetermined value and when the amount of power detected by the power storage detection means is less than or equal to a predetermined value, the control means The power generation apparatus according to claim 1, wherein output of electric power to an external load is stopped. The power generation means generates electric power by converting kinetic energy that rotates the rotating shaft into electric power,
The power generation apparatus according to claim 1, wherein the voltage detection unit detects a voltage based on a rotation speed of the rotation shaft.   The power generation device according to any one of claims 1 to 3, wherein a rotating shaft of the power generation means is rotated by wind power. An inverter that converts the electric power stored by the electric storage means into electric power having a specific wavelength and outputs the electric power to the external device;
The power generation apparatus according to claim 1, wherein the output unit is included in the inverter.   The power generator according to any one of claims 1 to 5, wherein when the output of power to the external load is stopped, the control unit stops after a predetermined time has elapsed. A storage means for storing the operation content of the control means;
Whether the control means stops output of electric power to the external load when the voltage detected by the voltage detection means is not more than a predetermined value based on the operation content stored in the storage means. The power generator according to any one of claims 1 to 6, wherein the power generator is selectively performed.   The power generator according to any one of claims 1 to 7, further comprising an operation unit that rewrites the storage content of the storage unit based on a user operation.   Power generated by the power generation means, amount of power stored in the power storage means, current of power stored in the power storage means, current of power consumed by the external load, and storage in the storage means The power generator according to claim 1, further comprising display means for displaying at least one of stored contents.   Consumed by the rotational speed of the rotating shaft of the power generation means, the power generated by the power generation means, the amount of power stored in the power storage means, the current of the power stored in the power storage means, and the external load The power generation according to any one of claims 3 to 8, further comprising display means for displaying at least one of a current of the stored power and stored contents stored in the storage means. apparatus.

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