JP2006238550A - Maintenance circuit for wind generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a maintenance circuit for a wind generator, with only a single maintenance person stationed at a windmill point, for discriminating the presence of mechanical failures or electrical connection failures. <P>SOLUTION: By loading the wind generator at constant fixed intervals, system failures can be grasped by the change in weight, when a windmill blade is rotated by hand. Thus, a power supply circuit includes a switch for loading or unloading the wind generator. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to means for detecting electrical and mechanical faults of a wind power generator.

In the maintenance of wind power generators, visual inspection is performed for mechanical component failures, and wiring checks using measuring instruments are performed for failures such as disconnection of electrical circuits.
"Small windmill utilization guide" (Fumio Matsu, Power, P150-160 "5.5 Monitoring and Maintenance")

Conventional fault detection of the mechanical structure of a wind power generator, particularly confirmation of the status of gears, bearings, and the like, is performed by visual inspection. For this purpose, it is necessary to open the case of the wind power generator. It is also possible to perform a failure test on the mechanical structure by manually rotating the windmill blade and testing whether it rotates smoothly. For that purpose, the wiring between the wind power generator and the power circuit is necessary. It was necessary to turn off. In addition, if the wind turbine blade is manually turned to diagnose a failure without disconnecting the wiring between the wind power generator and the power circuit, torque is generated and heavy due to the load applied to the generator. There is a drawback that it cannot be determined whether it is due to an abnormality or a short circuit of the electric circuit has occurred. Further, in order to confirm the connection between the windmill and the power supply circuit, it was necessary to disconnect the wiring between the wind power generator and the power supply circuit once and perform a continuity check using a measuring instrument such as a tester.

As described above, when performing a fault diagnosis of a wind power generation system, conventionally, the connection between the windmill and the power supply device is performed for disconnecting the connection between the windmill and the power circuit, or for rotating the windmill. There was a need to arrange maintenance personnel.

In order to solve the above problems, the present invention provides an electrical disconnection detecting means for detecting electrical disconnection of a wind power generator and a power supply circuit of the wind power generator, and a mechanical malfunction detection for detecting a mechanical malfunction of the wind power generator. It has a power supply device for wind power generators, characterized by comprising means. Further, the electrical disconnection detecting means includes a control device that applies a load to the wind turbine blade. In addition, the mechanical failure detection means includes a control device that does not apply a load to the wind turbine blade.

  According to the wind power generator maintenance circuit according to the present invention, a maintenance staff can manually rotate the blade of the windmill without opening the case of the wind power generator or using a measuring instrument such as a tester. It is possible to easily detect a general connection or a mechanical failure.

  In order to solve the above-mentioned problems, the present invention is a wind power generator in which a maintenance circuit is added. In the wind power generator, the wind power generator power circuit, the wind power generator control circuit, The best mode is composed of a maintenance circuit for wind power generator, which is constituted by a mechanical disconnection detection means and a mechanical failure detection means.

  A wind power generator maintenance circuit will be described below with reference to the accompanying drawings. FIG. 1 shows a wind power generator. When the windmill blade 11 rotates, the bearing 12 and the gear 13 rotate and the generator 14 generates power. The generated power passes through the electric wire 15 and reaches the wind power generator circuit 200 shown in FIG. In general, an alternating voltage generated by a wind power generator is converted into a direct current by a diode block 202, converted into a desired direct voltage by a DC / DC converter 206, and taken out as a direct current output 207.

FIG. 2 shows a power supply circuit including a maintenance circuit according to the present invention. The operation will be described with reference to the flowchart of FIG. 3 showing the embodiment of the present invention. When the maintenance start switch 213 is turned on, the output 210 of the timer circuit 212 is turned on and the switch 205 is cut off. When the switch 213 is in a conductive state, the output 211 of the timer circuit repeats the on / off state change at regular time intervals of about 5 seconds.

When the output 211 of the timer circuit is on, the switch 204 is turned on, and the electric brake is applied to the wind power generator by the resistor 209. Similarly, when 211 is off, the switch 204 is turned off and no load is applied to the wind power generator. In this way, by turning on the maintenance start switch 213, the load applied to the wind power generator repeats presence / absence at intervals of about 5 seconds.

As described above, when the switch 204 is in a conductive state and the wind generator is in an electric brake state, it is normal that the wind turbine blade is rotated heavily when the wind turbine blade is manually rotated. Further, when the switch 204 is turned off and no load is applied to the wind power generator, when the windmill blade is manually turned, it is normal to turn it lightly. On the contrary, when the windmill blade rotates lightly even though the switch 204 is conductive, it is in a state where the electric brake is not applied to the wind power generator, so that the generator coil is disconnected or the switch 204 is switched from the power generator. The disconnection of the connection up to can be specified. In addition, when the windmill blade rotates heavy in spite of the switch 204 being disconnected, it can be determined that a mechanical failure of the bearing, gear, or generator has occurred.

  FIG. 4 is a diagram showing a method for identifying a defect. Since the switch 204 is repeatedly turned on and off at regular time intervals, when the wind turbine blade is manually turned when the system is in a normal state, it is repeatedly turned at a regular time interval such as 41, which turns heavy or lightly. . However, when the above-described problems occur, when the windmill blade is manually rotated, it is light for a long time or heavy for a long time. According to the maintenance circuit of the present invention, it is determined that a mechanical failure occurs when it is heavy for a long time, such as 42, and an electrical failure occurs when it is light for a long time, such as 43. Is possible.

Wind turbine generator consisting of wind turbine blades, bearings, gears and generator The power supply circuit of a wind generator including the circuit for applying a load to the wind power generator and the circuit that does not apply the load of the present invention, and enabling easy maintenance. The flowchart of failure detection of this invention. The figure showing that it can specify whether a system is normal, there is an electrical malfunction, or there is a mechanical malfunction by the time change of the weight when turning a windmill blade manually.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Windmill blade 12 ... Bearing 13 ... Gear 14 ... Generator 15 ... Conductor 200 for supplying the generated voltage to the power supply circuit ... Power supply circuit 201 ... Same as 15 202 ... Diode block 203 ... Positive output 204 of the diode block ... Switch 1
205 ... switch 2
206 ... DC / DC converter 207 ... DC output 208 to the inverter 208 ... Negative output 209 of the diode block ... Resistor 210 ... Output 1 of the timer circuit
211 ... Output 2 of the timer circuit
212 ... Timer circuit 213 ... Maintenance start switch 301 ... Maintenance start switch turned on 302 ... Switch 205 turns off 303 ... Branch according to switch 204 state 304 ... When switch 204 is on 305 ... When switch 205 is off 306 ... When the switch 204 is on, a load is generated on the wind power generator 307... When the switch 204 is off, no load is applied to the wind power generator 308. When the wind turbine blade is turned manually, the branch 309 is heavy or light. When the wind turbine blade is manually turned, when the wind turbine blade is turned manually, the branch 310 is heavy or light. When windmill blade rotation is heavy in the state where the wind is generated 311... When the rotation of the windmill is light 312 When the rotation of the windmill blade is light while the load is applied 313 When the rotation of the windmill blade is heavy when the load is not applied 314 When an electrical failure occurs 315... That the abnormality has not occurred 316. Mechanical failure can be identified 41... Represents the weight when the system is operating normally when the windmill blade is rotated manually. ... represents the weight when there is a mechanical failure when manually rotating the windmill blade 43 ... represents the weight when there is an electrical failure when manually rotating the windmill blade

Claims (3)

Electrical disconnection detecting means for detecting electrical disconnection of a wind power generator and a power supply circuit of the wind power generator by turning on / off a load applied to the windmill blade, and mechanical failure detecting means for detecting a mechanical malfunction of the wind power generator A power generator for a wind power generator, characterized by comprising: 2. The power generator for wind power generator according to claim 1, wherein the electrical disconnection detecting means comprises a control device for applying a load to the wind turbine blade. 2. The power generator for wind power generator according to claim 1, wherein the mechanical failure detection means comprises a control device that does not apply a load to the wind turbine blade.