JP2017145734A - Wind power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wind power generator for realizing an efficient arrangement of equipment within a tower.SOLUTION: This invention relates to a wind power generator including a rotor rotated under receiving wind to perform a generating operation as the rotor is rotated. Its feature consists in providing a tower for supporting a load of the rotor; a first transformer 7 arranged in the tower; a circuit breaker 5 and a single operation detector device 6 electrically installed between the first transformer and an electrical power system and further installed at an upper floor than that of the first transformer; a second transformer 9 electrically arranged in parallel with the circuit breaker between the first transformer and the electrical power system and arranged at a floor different from that of the circuit breaker; and a resistor 8 electrically connected in series with the single operation detector device.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a wind turbine generator, and more particularly to a wind turbine generator that realizes efficient arrangement of equipment in a tower.

  In recent years, in order to prevent global warming, power generation systems using natural energy have attracted attention. Among them, wind power generators are widely used as relatively stable and efficient power generation systems.

  In the wind turbine generator, a boosting transformer is used to reduce transmission loss when the generated power is transmitted to the power system. When the transformer is arranged outside the wind power generator, it is exposed to wind and rain, so that it is necessary to take outdoor measures.

  In addition, when installing the wind power generator on the ocean, it is necessary to consider the installation location of the transformer, or it is necessary to consider measures against salt damage, so it is preferable to install it inside the wind power generator. .

  On the other hand, since the transformer has a certain width, various considerations are required from the viewpoint of space and the like when it is installed inside the wind turbine generator.

  As a background art in this technical field, for example, there is a technique such as Patent Document 1. Patent Document 1 discloses a configuration of a wind power generator (FIG. 1) in which power generated by a generator due to blade rotation is transformed by a transformer and then supplied from the system protection device to the power system. .

  In Patent Document 2, a three-phase transformer is accommodated in a nacelle, and the three-phase transformer and a transmission line are connected to the inside of the tower through a switchgear having a disconnector and a breaker installed outside. The structure (FIG. 1) of the wind power generator connected with the power cable extended up and down is disclosed.

Japanese Patent Laid-Open No. 2015-34487 JP 2010-268595 A

  By the way, in a wind power generator, when transmitting the generated electric power to an electric power system, a circuit breaker board is used so that it can be quickly disconnected from the electric power system when an accident occurs in the wind power generator. Like the transformer, this circuit breaker panel is preferably installed in the wind power generator because it requires waterproofing and rust prevention when placed outdoors or on the ocean.

  However, since the circuit breaker panel has a certain width as in the case of the transformer, various considerations such as a viewpoint in space are necessary for installation inside the wind turbine generator.

  In addition, conventionally, an isolated operation detection device and a transformer for the same are often configured as an integrated high voltage panel together with a circuit breaker panel, and such an integrated high voltage panel is installed in a narrow wind power generator. Therefore, various further studies are needed.

  Neither Patent Document 1 nor Patent Document 2 has a description of the above-described problems and solutions.

  Accordingly, an object of the present invention is to provide a wind turbine generator that realizes efficient arrangement of equipment in a tower.

  In order to solve the above-described problems, the present invention is a wind turbine generator that includes a rotor that rotates by receiving wind, and that performs a power generation operation in accordance with the rotation of the rotor, the tower that supports the load of the rotor, and the tower A first transformer disposed within the circuit board, and a circuit breaker panel electrically disposed between the first transformer and the power system, and disposed on a floor above the first transformer. An operation detection device, a second transformer electrically disposed in parallel with the circuit breaker panel between the first transformer and the power system, and disposed on a different floor from the circuit breaker panel; And a resistor electrically connected in series with the islanding detection device.

  ADVANTAGE OF THE INVENTION According to this invention, the arrangement | positioning of the efficient apparatus in the inside of a wind power generator especially in a tower is attained, and the more effective utilization of the space in a tower can be aimed at.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

1 is a schematic overall configuration diagram of a wind turbine generator according to an embodiment of the present invention. It is an expanded sectional view which shows the inside of the tower lower part in FIG. FIG. 3 is an electrical connection diagram between devices in FIG. 2. It is an expanded sectional view of the tower lowest floor in FIG. It is an expanded sectional view which shows the inside of the tower lower part in FIG. It is a top view of the tower lowest floor in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and detailed description of overlapping portions is omitted.

  FIG. 1 shows an overall outline of the wind turbine generator of this embodiment. As shown in FIG. 1, the wind turbine generator according to the present embodiment includes a rotor 1 that rotates by receiving wind, a nacelle 2 that rotatably supports the rotor 1, and a tower that rotatably supports the nacelle 2 in a horizontal plane. 3 is provided. An electric module 4 is disposed at the bottom of the tower 3. The electric module 4 is divided into a plurality of floors, and various electric parts and electronic devices are arranged on each floor. Details will be described below.

  FIG. 2 shows the arrangement of the electric modules 4 below the tower 3 in FIG. 1 in an enlarged manner. As shown in FIG. 2, the first transformer 7 is arranged on the lowest floor in the tower 3, and the second transformer 9 is arranged on the same floor as the first transformer 7. . Since the first transformer 7 and the second transformer 9 are on the lowest floor, there is an advantage that the efficiency of the maintenance work can be improved.

  Further, the circuit breaker panel 5 incorporates an isolated operation detection device 6, and the circuit breaker panel 5 and the isolated operation detection device 6 constitute an integrated high-pressure panel. The second transformer 9 and the resistor 8 are arranged on a different floor from the circuit breaker panel 5 and the independent operation detection device 6. In FIG. 2, the circuit breaker panel 5 and the islanding detection device 6 are installed on the uppermost floor (above the electric module 4), whereas the second transformer 9 and the resistor 8 are the lowermost of the tower 3. It is installed on the floor (B1F).

  The second transformer 9 is provided for detecting the isolated operation of the wind turbine generator in the isolated operation detection device 6, and has a smaller capacity than the first transformer 7 for boosting the generated power. Conventionally, the second transformer 9 is integrated with the islanding detection device 6 to form a high voltage panel, but the second transformer 9 of this embodiment is arranged separately from the islanding detection device 6. Because of its small size and small capacity, there is an advantage that it can be arranged on the same floor as the first transformer 7 occupying a large area in one floor.

  FIG. 3 shows electrical connections between the devices in FIG. As shown in FIG. 3, the isolated operation detection device 6 is a device for examining whether or not the wind power generation device is sending power in an isolated operation with respect to the power system 10 to which the wind power generation device is connected. In this embodiment, the second transformer 9 and the resistor 8 are connected. The isolated operation detection device 6 is electrically arranged in parallel with the circuit breaker panel 5 between the first transformer 7 and the power system 10 as described later. The isolated operation detection device 6 checks whether or not the wind turbine generator is sending electric power in isolated operation by monitoring the voltage and current on the generator side and system side.

  Independent operation refers to the supply of power from wind power generators or private power generation facilities when the power system connecting the power generation facilities is disconnected from the system power source (power generation facilities of the power company) due to an accident, etc. Means the state is being performed. For example, if an accident occurs in the power system, the power generation equipment is disconnected from the power system for safety, and the maintenance staff goes to the inspection, but when power is supplied from the private power generation equipment to the maintenance staff, There is a risk of electric shock. Moreover, it leads also to supplying electric power with respect to an accident point, and there exists a possibility that an accident may continue. The isolated operation detection device 6 is installed to prevent these dangers and accidents from continuing.

  The first transformer 7 is arranged on the lowest floor in the tower 3. As will be described later, the first transformer 7 is an oil-insulated transformer, and by arranging the first transformer 7 on the lowest floor in the tower 3, an advantage that will be described later as a countermeasure against oil leakage. There is. The first transformer 7 is preferably installed higher than the floor surface. By installing the first transformer 7 higher than the floor surface via a frame such as H-shaped steel, there is an advantage of suppressing rusting from moisture.

  In the present embodiment, the first transformer 7 is disposed underground (B1F) as shown in FIG. By arranging the first transformer 7 having the maximum weight among the electric modules 4 in the basement, there is an advantage that it is possible to easily reinforce the structure as a countermeasure against heavy objects. Moreover, it leads to the fall of a gravity center and the stability of the tower 3 also increases.

  FIG. 4 shows an enlarged cross section of the lowest floor of the tower in FIG. The bottom surface of the first transformer 7 is positioned higher than the oil surface when all the oil in the first transformer 7 leaks into the tower 3 (in consideration of the volume in the tower 3). A first transformer 7 is installed. There exists an advantage which the 1st transformer 7 does not immerse in the oil surface by setting it as a high position. At this time, the volume in the tower 3 and the volume of the first transformer 7, the resistor 8, and the second transformer 9 can be subtracted. In this figure, reference numeral 13 represents an oil level leaking from the first transformer 7.

  The tower inner wall 12 on the lowest floor in the tower 3 has an oil seal 14 that fills a gap between the power cable 17 and the ground at a position lower than the lower end (bottom surface) of the first transformer 7. By having the oil seal 14, there is an advantage that when oil leaks from the transformer, the oil does not flow into the ground.

  FIG. 5 is an enlarged sectional view showing the inside of the lower portion of the tower 3 in FIG. FIG. 6 is a plan view of the tower bottom floor in FIG. The elevator ladder 15 and the elevator 16 that communicate with different floors in the tower 3 and the power cable 17 that electrically connects the circuit breaker panel 5 and the first transformer 7 are provided. It is disposed through the communication space in the elevator 16. By arranging this communication space on a place where the operator cannot touch, for example, on the back side of the elevating ladder 15, an appropriate separation can be ensured, and a new cable route is unnecessary.

  A duct (exhaust heat duct) 19 extending across a plurality of floors is partially disposed on the floor where the first transformer 7 is installed. By arranging the duct 19, there is an advantage that heat is not accumulated due to heat radiation by the first transformer 7.

  According to the contents described above, the first transformer 7 and the second transformer 9 for the independent operation detection device 6 are electrically arranged on a different floor from the circuit breaker panel 5, It is possible to provide a wind turbine generator that realizes efficient arrangement of equipment.

  Specifically, the second transformer 9 for the single operation detection device 6 is often configured as a high voltage panel together with another device (for example, configured with the circuit breaker panel 5), and in such a case, The high-pressure panel occupies a large area as compared with the floor area inside the tower 3 alone. In such a situation, it is not easy to arrange the electric module 4 inside the tower 3, and it has been desired to make more effective use of the space. Therefore, in the present embodiment, the second transformer 9 for the independent operation detection device 6 that has been conventionally configured as an integrated high voltage board together with another device is provided separately from the high voltage board, and the high voltage board is further provided. Since it is arranged on a different floor, the size of the breaker panel 5 alone, which occupies a large area, can be reduced.

  In the present embodiment, the second transformer 9 for the isolated operation detection device 6 is disposed on the same floor as the first transformer 7. This is because the first transformer 7 and the second transformer 9 are devices that require relatively little maintenance even in the electric module 4, and maintenance is performed by consolidating such devices on one floor. Work efficiency can be improved. In addition, since a high voltage is generated in the first transformer 7, it is preferable that the operator should have fewer opportunities to go nearby. As in the present embodiment, similarly to the floor of the first transformer 7, equipment having a low necessity for maintenance is arranged, which contributes to the safety of the operator.

  In addition, about the 2nd transformer 9 used with the independent operation detection apparatus 6, it is provided with the function to confirm whether the generated power is sent to an electric power system to the last, and the path | route which transmits generated electric power to an electric power system Compared with the first transformer 7 provided in FIG. Therefore, as shown in FIG. 6, it is also possible to arrange the resistor 8 and the like on the same floor as the first transformer 7 occupying a large area in one floor.

  Furthermore, in the present embodiment, the first transformer 7 is arranged on the lowest floor in the tower 3. Since the first transformer 7 is the heaviest among the electric modules 4, it is preferable that the first transformer 7 is disposed as low as possible in consideration of stability. On the other hand, since the first transformer 7 is oil-insulated in the present embodiment, oil is sealed in the first transformer 7. Even if this oil leaks, the first transformer 7 is arranged on the lowest floor in the tower 3, so that the oil flows to other floors and the influence is spread. There is also an aim to prevent this.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Rotor, 2 ... Nacelle, 3 ... Tower, 4 ... Electric module, 5 ... Circuit breaker board, 6 ... Single operation detection device, 7 ... 1st transformer, 8 ... Resistor, 9 ... 2nd transformer DESCRIPTION OF SYMBOLS 10 ... Electric power system, 11 ... Generator, 12 ... Tower inner wall, 13 ... Oil surface, 14 ... Oil seal, 15 ... Lifting ladder, 16 ... Lifting machine, 17 ... Electric power cable, 18 ... Mount (H-shaped steel), 19 ... duct (exhaust heat duct).

Claims (10)

A wind power generator comprising a rotor that rotates by receiving wind, and that performs a power generation operation as the rotor rotates,
A tower for supporting the load of the rotor;
A first transformer disposed in the tower;
A circuit breaker panel and a single operation detection device that are electrically disposed between the first transformer and the power system, and are disposed on a floor above the first transformer;
A second transformer electrically disposed in parallel with the circuit breaker board between the first transformer and the power system, and disposed on a different floor from the circuit breaker board;
A resistor electrically connected in series with the islanding detection device;
A wind turbine generator comprising: The wind turbine generator according to claim 1,
The wind turbine generator according to claim 1, wherein the second transformer is disposed on the same floor as the first transformer. The wind power generator according to claim 1 or 2,
The wind turbine generator characterized in that the second transformer has a smaller capacity than the first transformer. The wind turbine generator according to any one of claims 1 to 3,
The wind turbine generator according to claim 1, wherein the first transformer is arranged on the lowest floor in the tower. The wind power generator according to claim 4,
The wind turbine generator according to claim 1, wherein the first transformer is disposed on an underground floor. The wind turbine generator according to claim 4 or 5,
The first transformer is an oil-insulated transformer, and the bottom surface of the first transformer is disposed at a position higher than the floor surface by being installed via a mount. Wind power generator. The wind turbine generator according to claim 6,
The wind turbine generator according to claim 1, wherein the first transformer is arranged at a position higher than the leaked oil surface when the oil in the first transformer leaks into the tower. The wind power generator according to claim 6 or 7,
The wind turbine generator according to claim 1, wherein an inner wall of the tower on the lowest floor in the tower has an oil seal at a position lower than a bottom surface of the first transformer. The wind power generator according to any one of claims 1 to 8,
In the tower, an elevator ladder or elevator that communicates between different floors, and
A power cable electrically connecting the circuit breaker panel and the first transformer,
The said power cable is arrange | positioned through the communicating space of each floor in the said elevator ladder or the said elevator, The wind power generator characterized by the above-mentioned. The wind power generator according to any one of claims 1 to 9,
A part of a duct extending across a plurality of floors is arranged on the floor where the first transformer is installed.

Images