JP2016041912A - Thunderbolt control system of power generating facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a remote and fast judgement about continuation of operation required for control of power generating facility and requirement of replacement of consumable by getting "presence" or "non-presence" of thunderbolt through a thunderbolt sensor arranged at a blade, transmitting it to a thunderbolt signal relay and a thunderbolt current measuring device through aerial transmission and optical communication and taking a scale of quantitative thunderbolt for every precision blade.SOLUTION: This invention relates to a thunderbolt control system comprising a plurality of thunderbolt sensors 1111 for detecting presence or non-presence of thunderbolt installed at a plurality of rotatable blades 31; a thunder signal relay 112 installed in a nacell 5 for transmitting a rotating function of the blades and for performing electrical or optical communication under no mechanical contact with the thunderbolt sensors; a thunderbolt current measuring device 115 having a signal from the thunderbolt relay connected, keeping a communication with the thunderbolt sensor under electrical insulation state and installed on the ground near wind power generating facilities; and a device for performing a remote and fast communication of data indicating a scale of the detected thunderbolt.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lightning strike management system in which a lightning strike current measuring device is arranged in the vicinity of a foundation serving as a base of a tower body of a power generation facility that is a so-called tower type windmill.

  Conventionally, power generation equipment for tower type wind turbines is roughly composed of blades, hubs, nacelles, towers, etc., but this power generation equipment has been rapidly installed and developed from the viewpoint of the use of natural energy and the prevention of pollution. However, lightning strikes in some regions have a large energy (thunderbolt scale) and are a major risk for wind power generation facilities, causing serious accidents. In particular, there are many cases of lightning damage to the blade. As a result, the safety of the wind power generation facilities is lost due to fires, scattering of parts, etc., and the cost and time of repairs and restoration of these are required. The economic loss is large. Therefore, it is desirable to have a lightning management system that can quickly determine the scale of lightning strikes from the precise and quantitative lightning measurement data to identify the blades that have been lightened for the purpose of accurately ascertaining the lightning damage situation and quick recovery.

  For example, although the wind power generation facility of Patent Document 1 is installed with a lightning strike management system, the risk of lightning strikes has increased recently. It is not a lightning strike management system that can quickly determine the scale of lightning strikes from data. Therefore, it is required to realize a lightning strike management system that satisfies these requirements.

  Therefore, the present inventors simply arranged a lightning strike sensor that senses only “present” or “no” of lightning strikes for the lightning strike to the blade in terms of structural function, and installed this inside the blade. In addition, communication with the lightning sensor installed in the rotating part of the windmill will not cause communication failure or malfunction by using a lightning signal repeater and mechanical non-contact communication means such as wireless or optical communication. A Rogowski coil of a lightning current measuring device that can measure and measure quantitatively with high accuracy is wound around the tower base, and is electrically insulated and connected to the lightning current measuring device. The lightning current measuring device and the lightning sensor placed on the ground are placed in an electrically insulated state to realize a lightning management system that eliminates the effects of lightning surge current.

JP 2008-153010 A

  The problems to be solved by the invention are the reduction of lightning risk by identifying the lightning blades and the lightning strikes to the wind power generation facilities quantitatively and quickly, the ease of installation of current measuring devices and the ease of aging management.・ Realization of convenience, lightning sensor, lightning signal repeater, and lightning current measuring instrument communication are optical or wireless communication such as light or wireless, and contactless mechanically with the rotating mechanism. To prevent the lightning current measuring device from receiving.

  The present invention is a lightning strike management system for wind power generation equipment, comprising a lightning strike sensor for detecting the presence or absence of a plurality of lightning strikes installed on a plurality of rotatable blades, and the lightning strike installed in a nacelle that conveys the rotation function of the blades. A lightning signal repeater that is electrically or optically communicated with a sensor without contact with a sensor, and a signal is connected from the lightning strike relay, and the communication with the lightning strike sensor is in an electrically isolated state, and wind power generation A lightning strike management system comprising a lightning current measuring device installed on the ground in the vicinity of a facility and a device for rapidly and remotely communicating data indicating the detected lightning scale.

  According to the first aspect of the present invention, since the lightning strike sensor is installed for each blade, it is possible to know a quantitative lightning strike scale (lightning strike time, lightning current waveform, charge amount), and in addition to this, the lightning strike From the scale, it is possible to know whether the windmill can be operated, whether repair is necessary, replacement of consumables such as receptors and SPDs. Furthermore, since the lightning current measuring device can be installed on the ground, it can realize high measurement accuracy at a low cost with multiple functions.

1 is a schematic configuration diagram of a lightning strike management system according to a first embodiment of the present invention. FIG. 2 is a system block diagram according to the first embodiment of the present invention.

    A lightning strike management system according to an embodiment of the present invention will be described below with reference to the drawings.

Example 1
First, the wind turbine generator according to the first embodiment of the present invention has the structure shown in FIG. 1, and the receptor 11 receiving the lightning strike and the pull-down conductor 21 are connected to each other and attached to the blade 31. In this case, three blades 31 are prepared. These are arranged and mounted at equal intervals in the circumferential direction of the hub 4. A nacelle 5 to which the hub 4 is rotatably attached is disposed on the back of the hub 4, and the nacelle 5 is installed in a structure attached to the head of the tower 6. The hub 4 and the nacelle 5 are structured to flow lightning current through brushes and discharge gaps.

  The hub 4 is fixed to a generator shaft 7, and the generator shaft 7 is mechanically coupled to a generator 8 so that rotation can be transmitted. The nacelle 5 is protected by the frame 9 structure. The lightning current flows from the lightning receptor 11 to the frame 9, the tower 6, and the grounding wire 11 through the conductor 21 and the hub 4, the brush and the discharge gap. A power line 10 is arranged along the tower 6 in the generator 8. 11 is a ground wire. In this case, the hub 4 and the nacelle 5 are mechanically open, and therefore the rotation of the hub 4 is transmitted to the generator 8 only by the generator shaft 7.

Next, a lightning strike management system of the present invention will be described with reference to FIG. 1 and FIG. 2. Lightning strike sensors 1111, 1112, and 1113 are mechanically attached to the blades 31, 32, and 33. The lightning signals detected accurately at 1112 and 1113 were installed near the foundation of the tower 6 via the lightning signal repeater 112 as lightning “present” and “non-existent” signals and mechanical contactless state (light / radio signal). It is sent to the lightning current measuring device 115. The lightning strike signal repeater 112 and the lightning strike current measuring device 115 are electrically insulated and communicate.

  By this transmission, the lightning blades of the blades 31, 32, and 33 are identified in synchronization with the data measured by the lightning current measuring device 115, and a quantitative lightning scale (lightning strike time, lightning current waveform, charge amount) is measured. be able to. Further, it is possible to know the continuation of the operation of the wind power generation facility or the necessity of consumables such as a receptor and SPD from the lightning strike scale. These lightning strikes can be communicated with remote locations using a communication device. An optical cable 113 is an optical cable for sending a lightning strike signal from the lightning strike signal repeater 112 to the lightning strike current measuring device 115, and 114 is a Rogowski coil.

  FIG. 2 shows the entire system as a block. Lightning strike “11”, “1112”, and “1131” signals from lightning sensors 1111, 1112, and 1113 arranged in the blades 31, 32, and 33 are transmitted in the nacelle 5 by optical communication. It is sent to the lightning strike signal repeater 112. In this case, the dotted line represents lightning signals from the lightning sensors 1111, 1112, and 1113.

  The lightning strike signal input to the lightning strike repeater 112 is sent to the lightning strike current measuring device 115 connected to the Rogowski coil 114 through the optical cable 113 in the tower 6. The lightning current measuring device 115 is connected to a public line (cell phone network) or a local area LAN and communicates the lightning intensity to a remote location such as an operation control station connected to the public line (cell phone network), thereby grasping the lightning intensity to the wind power generation facility. A communication port that can be maintained is provided.

  Next, when there is a lightning strike on the blade 31, the lightning strike sensor 1111 detects the lightning strike, and puts the blade number that detected the lightning strike on the lightning strike signal repeater 112 (indicated by a straight dotted line) by optical / wireless communication. The lightning strike signal repeater 112 converts a signal related to the lightning strike blade into an optical signal and sends it to the lightning strike current measuring device 115 through the optical cable 113 which is not affected by the surge current. The lightning current flowing in the tower is measured by the Rogowski coil 114 connected to the lightning current measuring device 115, and the lightning current waveform and the lightning time are recorded in the lightning measuring device 115 in synchronization with the signal from the lightning sensor 1111. The communication port provided in the lightning strike measuring device 115 makes it possible to communicate the lightning strike scale to a remote location.

  In this case, the lightning current flows in the order of the receptor 11 → the pull-down conductor 21 (the lightning blade is detected by the lightning sensor along the blade surface) → the hub 4 (the current flows through the brush and the gap) → the nacelle 5 → the tower 6 (the Rogowski coil). The lightning current is measured at 114) → the ground line 11.

  In this embodiment, a lightning strike sensor, a lightning strike signal repeater are battery-powered independent power supplies, and communication is electrically insulated and mechanical contactless optical communication. For this reason, the measurement data is reliable because it is configured to wipe out the damage of the device due to the surge or the situation where measurement is impossible. Further, the lightning strike measuring device can perform remote communication by providing a communication port.

  The present invention can be widely applied to lines such as a telephone line system and a power cable of a power system in addition to the communication system as described above.

11, 12, 13 Receptor 21, 22, 23 Pull-down conductor 31, 32, 33 Blade 4 Hub 5 Nacelle 6 Tower 7 Generator shaft 8 Generator 9 Frame 10 Power line 11 Ground line 1111, 1112, 1113 Lightning sensor 112 Lightning signal repeater 113 Optical cable 114 Rogowski coil 115 Lightning current measuring device

Claims (1)

  A lightning strike management system for wind power generation facilities, which is a lightning sensor for detecting the presence or absence of a plurality of lightning strikes installed on a plurality of rotatable blades, and a lightning strike sensor installed in a nacelle that transmits the rotation function of the blades. A lightning signal repeater that communicates electrically or optically without electrical contact, and a signal connected from the lightning strike relay, and communication with the lightning strike sensor is in an electrically insulated state and is near the wind power generation facility A lightning current management system comprising: a lightning current measuring device installed in a facility, and a device for quickly and remotely communicating data indicating the detected lightning intensity.

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