JP2006046296A - Gas turbine power generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas turbine power generating device, in which component parts in an electric equipment unit are disposed compactly as well to reduce occupied area, and in which maintenance performance is improved. <P>SOLUTION: The electric equipment unit 40 is provided to convert generated power in this gas turbine power generating device through an inverter into AC current of a desired frequency. On the side of a placement surface 406b on the opposite side to an air passage in a heat sink 406 in which the air passage is formed for air sucked by a cooling fan 40a to pass, the component parts of the electric equipment unit 40, that is 12 switching elements 400a1 and 400b1 in the inverter 400, a DC-DC converter, a terminal box 412, and a capacitor 400c are placed. The heat sink 406 is composed to be drawable from the front surface side of a case. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas turbine power generator, and more specifically to an arrangement structure of electrical units therein.

  A gas turbine power generator comprising a gas turbine engine such as a single shaft type in which a compressor and a turbine are coaxially arranged and a generator connected to the engine is housed in a housing (housing) is well known, The present applicant has also proposed, for example, in Patent Document 1 below. In the technique described in Patent Document 1, the entire power generation apparatus such as an engine and a generator is housed in a compact manner to reduce the occupied space and improve the maintainability.

In addition, this type of gas turbine power generator is provided with an electrical unit that converts the power generated by the generator into an alternating current of an arbitrary frequency and supplies it to an external electrical load. -AC converter) requires heat dissipation, and conventionally, as in the technique described in Patent Document 2, for example, a heat sink is provided inside the power converter, and the cooling air introduced from the inlet opening at the bottom of the converter is used. It has been proposed to cool the heat sink.
JP 2004-084576 A JP 2003-120329 A (paragraph 0036)

  By the way, as in the technique described in Patent Document 1, the entire power generation apparatus is housed in a compact manner to improve maintainability, and the electrical components in the power generation unit can be housed in a compact manner to reduce the occupied area. However, it is desirable to improve the maintainability, but in that case, there is a limit in terms of improving compactness and maintainability when the heat sink is arranged inside the component as in the technique described in Patent Document 2. .

  Accordingly, an object of the present invention is to provide a gas turbine power generator that solves the above-described problems and that compactly arranges the components of the electrical unit to reduce the occupied area and improve the maintainability. is there.

  In order to solve the above-described problem, in claim 1, a gas turbine engine and a generator connected to the engine are provided, and at least a housing for accommodating the engine and the generator is provided. In the gas turbine power generator, an electrical unit that converts the electric power generated by the generator into an alternating current of an arbitrary frequency through an inverter and supplies the alternating current to an external electric load is disposed on the front side of the casing and is air A cooling fan that sucks air, a heat sink in which an air passage through which air sucked by the cooling fan passes is formed, and is placed on the placement surface side of the heat sink opposite to the surface facing the air passage, and the inverter A plurality of switching elements constituting the front of the plurality of switching elements at a position corresponding to the downstream in the air flow in the air passage. A DC-DC converter mounted on the mounting surface side and connected to the inverter; a terminal mounted on the mounting surface side and connecting a plurality of switching elements of the inverter to a subsequent LC filter; and The capacitor is configured to be placed on the mounting surface side and smoothes the output converted by the switching element, and the heat sink is configured to be freely drawn out from the front side of the housing.

  In the gas turbine power generator according to claim 1, the inverter is disposed on the mounting surface side opposite to the surface facing the air passage of the heat sink in which the air passage through which the air sucked by the cooling fan passes is formed. Since a plurality of switching elements, a DC-DC converter, a terminal connected to the LC filter, and a capacitor are arranged, in other words, most of the components constituting the electrical unit are arranged on the heat sink. Since it did in this way, an electrical equipment unit can be arrange | positioned compactly and an occupation area can be reduced.

  Further, since the heat sink on which the components of the electrical unit are placed can be pulled out from the front side of the housing, the maintainability can be improved. In addition, since the cooling fan is also arranged on the front side of the casing, the cooling fan can be easily replaced and the maintainability can be further improved.

  In addition, since the components of the electrical unit are configured to be placed on the placement surface opposite to the surface facing the air passage through which the air sucked by the cooling fan passes, heat can be effectively dissipated. . Furthermore, since the DC-DC converter having a relatively small heat dissipation requirement is arranged on the downstream side of the switching element, the heat dissipation requirement can be satisfied.

  The best mode for carrying out the gas turbine power generator according to the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 is a perspective view generally showing a gas turbine power generator according to a first embodiment of the present invention, and FIG. 2 is a reduced perspective view showing the apparatus shown in FIG.

  1 and 2, reference numeral 10 indicates a gas turbine power generator (hereinafter simply referred to as “power generator”). As shown in FIG. 1, the power generation apparatus 10 is surrounded by a package frame 12, to which a side plate 14, a rear plate 16, a door (not shown) 20, a roof (not shown), and the like are attached. A rectangular parallelepiped housing (housing) 22 is formed. The power generation device 10 thus includes the housing (housing) 22 and is accommodated therein.

  As shown in FIG. 2, the casing 22 is divided into upper and lower parts in the direction of gravity by a partition wall 24, and a cylinder and a compressor and a turbine (both not shown) are coaxially arranged in an upper space formed thereby. A gas turbine engine 26 (hereinafter simply referred to as an “engine”) 26 is accommodated horizontally (the direction of the rotating shaft of the turbine or the like is the horizontal direction).

  The engine 26 is connected to a generator 30 driven by the rotational output. An intake passage 32 for introducing intake air to the engine 26 is provided between the engine 26 and the generator 30 and is airtightly connected to an intake port of the engine 26 via an appropriate sealing material (not shown). Further, an exhaust duct (not shown) is disposed at an end of the engine 26 opposite to the side to which the generator 30 is connected, and an exhaust port of the engine 26 is connected via an appropriate sealing material (not shown). Connected airtight. In addition, illustration of the engine 26 and the generator 30 was abbreviate | omitted in FIG.

  Further, in the lower space of the housing 22, a fuel compression compressor 34 is disposed at a position that is diagonal to the engine 26 disposed in the upper space. The fuel compression compressor 34 compresses gaseous fuel such as natural gas or city gas, and supplies the compressed fuel to the engine 26 via a fuel supply path (not shown).

  In addition, an air intake duct 36 (shown in FIG. 2) for introducing intake air into the engine 26 is disposed immediately below the engine 26 in the lower space of the housing 22, and further below that, an electrical unit 40 is disposed. Be placed. As shown in FIG. 1, the electrical unit 40 is electrically connected to the generator 30, converts the electric power generated by the generator 30 into an alternating current of an arbitrary frequency, and supplies it to an external electrical device (not shown). .

  The electrical unit 40 includes four cooling fans 40a, and controls the operation (number of rotations) of the cooling fan 40a according to the temperature in the unit to prevent an excessive temperature rise. Furthermore, the electrical unit 40 controls the operation of other cooling fan groups (all not shown) and also controls the rotational speed of the engine 26 in response to a request for power supply from an external electrical device.

  The details of the other cooling fan group, the intake duct 36 or the exhaust duct, and the engine 26 are described in detail in Patent Document 1 previously proposed by the present applicant. Is omitted.

  Next, the electrical unit 40 will be described in detail.

  As described above, the electrical unit 40 operates to convert the electric power generated by the generator 30 into an alternating current of an arbitrary frequency via an inverter and supply it to an external load. See the circuit diagram shown in FIG. The inverter 400 that is a main component of the electrical unit 40 will be described first.

  As illustrated, the inverter 400 mainly includes a converter unit 400a and an inverter unit 400b. The converter unit 400a includes six switching elements 400a1 for positive and negative, and inputs the generated power (alternating current) output through the three-phase connection of the generator 30, and converts it into direct current by the action of the known switching element 400a1. All of these six switching elements 400a1 are composed of IGBTs (Insulated-Gate Bipolar Transistors).

  The output of the converter unit 400a converted into direct current by the switching element 400a1 is smoothed by the capacitor 400c and then input to the inverter unit 400b. The inverter unit 400b is also composed of six switching elements 400b1 for positive and negative, where the input is converted again to an alternating current with an appropriate frequency by the switching action of the element 400b1, and an LC filter (circuit) for removing high frequency components due to the switching action. It is supplied to an electric load 402 such as an external illumination via 400d and the contactor 400e.

  Similarly, the six switching elements 400b1 of the inverter unit 400b are made of IGBTs. The contactor 400e is a device (switch) for electrically connecting / disconnecting the gas turbine power generator 10 to / from the electric load 402.

  Furthermore, the output of the converter unit 400a is stepped down to an appropriate voltage via a DC-DC converter 404 connected to the inverter 400, and supplied as power for auxiliary equipment such as an indicator (not shown) of the operation panel.

  When the electrical unit 40 has the circuit configuration as described above, the converter unit 400a, the inverter unit 400b, and the DC-DC converter 404 have a relatively large amount of heat generation. Therefore, it is necessary to dissipate heat by providing a heat sink or the like. If the heat sinks are individually arranged inside or in the vicinity thereof as in the technique described in Document 2, the size of the heat sink must be increased. Therefore, in this embodiment, only one heat sink 406 is provided, and the switching element 400a1 and the like are placed (mounted) on the heat sink 406.

  4 and subsequent drawings, FIG. 4 is a perspective view of the heat sink 406, FIG. 5 is a perspective view of the electrical unit 40 with components such as the switching element 400a1 placed thereon, FIG. FIG. 7 is a plan view of the electrical unit 40 shown in FIG. 5, and FIG. 7 is an enlarged side view thereof.

  As shown in the figure, the heat sink 406 has a generally box shape, a lower portion is formed in a cavity, and an air passage 406a through which cooling air sucked by the four cooling fans 40a passes in a direction indicated by an arrow is formed. At the same time, a surface (surface) opposite to the surface facing the air passage 406a is flat, and a mounting surface 406b on which the above-described components are mounted is formed. Specifically, the heat sink 406 is manufactured by joining two heat sinks.

  The air flowing through the air passage 406a of the heat sink 406 is discharged to the outside of the housing 22 through a discharge hole (not shown) formed in the rear plate 16.

  As shown in FIGS. 5 to 7, the switching element 400a1 of the converter unit 400a is placed so as to be in direct contact with the placement surface 406b in parallel on the placement surface 406b side, more specifically near the center thereof. At the same time, six switching elements 400b1 of the inverter unit 400b are placed in parallel so as to form a pair in the vicinity thereof so as to be in direct contact with the placement surface 406b.

  In the vicinity of the converter unit 400a and the inverter unit 400b, more precisely in the vicinity of the switching elements 400a1 and 400b1, the capacitor 400c is mounted on the mounting surface 406b side, more specifically in the vertical direction. . Six capacitors 400c, which are half the number of switching elements 400a1 and 400b1 (12 in total), are provided, and are connected to these switching elements via bus bars 410a and 410b made of positive and negative electrodes.

  8 is an enlarged partial perspective view showing the bus bar 410a on the negative electrode (−) side, and FIG. 9 is a bus bar 410b on the positive electrode (+) side. In FIG. 9, reference numeral 410c indicates insulating paper (removed from the leftmost capacitor 400c). As shown in the drawing, the bus bar 410 is configured by sandwiching insulating paper between two copper plates and has a plate shape.

  In addition, in the vicinity of the converter unit 400a and the inverter unit 400b, more precisely in the vicinity of the switching elements 400a1 and 400b1, there are two terminal blocks (terminals) 412a and 412b on the mounting surface 406b side, more specifically, Similarly, it is placed at an upper position in the vertical direction.

  Terminal block 412a is connected to switching element 400a1 of converter unit 400a via bus bars 414a, 414b, and 414c, respectively. Further, the terminal block 412b is connected to the switching element 400b1 of the inverter unit 400b via the bus bars 414d, 414e, and 414f, respectively. Around each bus bar, a current sensor 416 composed of a Hall element is provided to generate an output proportional to the current flowing through each bus bar.

  On the other hand, as shown in FIG. 1, the terminal block 412a is connected to an ACL (AC inductor) 420 installed for the purpose of improving the current controllability of the converter unit 400a via a cable 422, and the ACL 420 is connected to a cable 424. Is connected to the generator 30.

  The terminal block 412b is connected to the LC filter 400d via the cable 426, and the LC filter 400d is connected to the contactor 400e via the cable 430, and is supplied from the contactor 400e to the external electrical load 402 (FIG. 3). Is done. In FIG. 1, the LC filter 400d and the contactor 400e are shown in a state of being accommodated in the case.

  Further, as shown in FIG. 7, a DC-DC converter 404 is placed below the terminal block 412 at a position corresponding to the downstream in the flow of air (cooling air) in the air passage 406a rather than the switching elements 400a1 and 400b1. More specifically, it is placed (placed) on the placement surface 406b side so as to be in direct contact with the placement surface 406b.

  In FIG. 5 and the like, reference numerals 432 and 434 denote a part of the first and second covers. FIG. 10 is a reduced perspective view of the electrical unit 40 showing a state where the first and second covers 432 and 434 are attached to the electrical unit 40 shown in FIG. As shown in FIG. 10, the first cover 432 covers the entire heat sink 406 and protects each component of the electrical unit 40. The second cover 434 is attached separately from the first cover 432 so as to cover only the vicinity of the upper portion of the terminal block 412 (not shown in FIG. 10).

  Further, as shown in FIG. 10, the heat sink 406 is configured to be movable along the guide rail 436 by engaging the lower end portions on both sides with the guide rail 436 fixed to the housing 22. Thereby, as shown in FIG. 2, the electrical unit 40 is configured to be freely drawn out from the front side of the housing 22 via the guide rail 436.

  In the gas turbine power generator according to this embodiment, the electrical unit 40 includes the single heat sink 406 as described above, and an air passage 406a through which air (cooling air) sucked by the cooling fan 40a passes. The mounting surface side 406b opposite to the surface facing the air passage 406a of the heat sink 406 to be formed is connected to the plurality of switching elements 400a1 and 400b1, the DC-DC converter 404, the LC filter 400d, and the like of the inverter 400. Since the terminal block (terminal) 412 and the capacitor 400c to be arranged are arranged, in other words, most of the components constituting the electric unit 40 are arranged on the heat sink 406. , While ensuring cooling performance, it can be compactly arranged to reduce the occupied area. Can.

  Furthermore, since the heat sink 406 on which the components of the electrical unit 40 are placed, in other words, the electrical unit 40 can be pulled out from the front side of the housing 22 via the guide rail 436, If the second cover 434 is removed, the terminal block 412 and the like can be quickly accessed, so that maintainability can be improved. In addition, since the cooling fan 40a is also arranged on the front side of the housing 22, the cooling fan 40a can be easily replaced and the maintainability can be further improved.

  In addition, since the components of the electrical unit are configured to be placed on the opposite side of the surface facing the air passage 406a through which the air sucked by the cooling fan 40a passes, in other words, placed on the nearest placement surface 406b. In addition, it is possible to effectively dissipate components such as switching elements. Furthermore, since the DC-DC converter 404 having a relatively small heat dissipation requirement is arranged on the downstream side of the switching elements 400a1 and 400b1, the heat dissipation can be performed without any problem. In addition, since the capacitor 400c and the terminal block 412 are placed above the placement surface 406b, the lateral length of the electrical unit 40 can be reduced.

  Further, twelve switching elements 400a1 and 400b1 are arranged in parallel, and the capacitor 400c is provided by a half of the number and connected by the plate-like bus bar 410. In other words, the switching element is connected to the aggregate of the capacitors 400c. Since it did in this way, the problem that a surge generate | occur | produces in the switching element arrange | positioned at both ends can be avoided.

  Further, since the current sensor 416 is directly attached to the bus bar 414 connecting the terminal block 412 to the switching elements 400a1 and 400b1, the mounting base can be omitted.

  In addition, with the configuration as described above, it is possible to improve the compactness and maintainability of the power generation apparatus 10 as a whole, and to achieve further silence.

  Thus, in this embodiment, the gas turbine includes the gas turbine engine 26 and the generator 30 connected to the engine, and includes at least the engine and the casing 22 that houses the generator. In the power generation apparatus 10, an electrical unit 40 that converts the electric power generated by the generator into an alternating current having an arbitrary frequency via an inverter 400 and supplies the alternating current to an external electrical load 402 is disposed on the front side of the casing. A cooling fan 40a for sucking air, a heat sink 406 in which an air passage 406a through which the air sucked by the cooling fan passes is formed, and a mounting surface 406b side opposite to the surface facing the air passage of the heat sink The plurality of switching elements 400a1 and 400b1 that are installed and constitute the inverter 400, and the plurality of switching elements It is placed on the placement surface 406b side at a position corresponding to the downstream in the air flow in the air passage from the element, and placed on the placement surface 406b side, the DC-DC converter 404 connected to the inverter. , A terminal (more specifically, a terminal block) 412 for connecting a plurality of switching elements of the inverter to the LC filter 400d in the subsequent stage, and an output converted by the switching element. The heat sink 406 is configured to be freely drawn out from the front side of the housing 22.

  In the above description, the capacitor 400c or the terminal block 412 is disposed at an upper position in the vertical direction of the mounting surface 406b. However, a concave portion is formed in a lower position, for example, the mounting surface 406b, and embedded therein. You may make it do.

1 is a perspective view generally showing a gas turbine power generator according to a first embodiment of the present invention. FIG. 2 is a reduced perspective view showing the apparatus shown in FIG. FIG. 2 is a circuit diagram of an inverter that is a main component of the electrical unit shown in FIG. 1 and the like. It is a perspective view of the heat sink arrange | positioned inside the electrical equipment unit shown in FIG. FIG. 5 is a perspective view showing an electrical unit in a state where components such as switching elements of the inverter shown in FIG. 3 are placed on the heat sink shown in FIG. 4. It is a top view of the electrical equipment unit shown in FIG. FIG. 6 is an enlarged side view of the electrical unit shown in FIG. 5. FIG. 6 is an enlarged perspective view showing that on the negative electrode (−) side in the bus bar connecting the inverter switching element to the capacitor shown in FIG. 5 and the like. Similarly, it is an enlarged perspective view showing that on the positive electrode (+) side in the bus bar connecting the switching element of the inverter to the capacitor shown in FIG. 5 and the like. FIG. 6 is a reduced perspective view of the electrical unit showing a state where a cover is attached to the electrical unit shown in FIG. 5.

Explanation of symbols

10 Gas Turbine Generator 22 Housing (Housing)
26 Gas Turbine Engine 30 Generator 40 Electrical Unit 40a Cooling Fan 400 Inverter 400a Converter Unit 400a1 Converter Unit Switching Element 400b Inverter Unit 400b1 Inverter Unit Switching Element 400c Capacitor 400d LC Filter (Circuit)
402 Electric load 404 DC-DC converter 406 Heat sink 406a Air passage 406b Placement surface 412 Terminal block (terminal)

Claims (1)

In a gas turbine power generator comprising a gas turbine engine and a generator connected to the engine, and comprising at least the engine and a housing for housing the generator, the power generated by the generator is passed through an inverter. An electrical unit that converts AC current of any frequency and supplies it to an external electrical load,
a. A cooling fan that is disposed on the front side of the housing and sucks air;
b. A heat sink in which an air passage through which air sucked by the cooling fan passes is formed;
c. A plurality of switching elements that are mounted on a mounting surface side opposite to a surface facing the air passage of the heat sink and constitute the inverter;
d. A DC-DC converter mounted on the mounting surface side at a position corresponding to the downstream in the air flow in the air passage from the plurality of switching elements and connected to the inverter;
e. A terminal mounted on the mounting surface side and connecting a plurality of switching elements of the inverter to a subsequent LC filter;
And f. A capacitor placed on the placement surface side and smoothing the output converted by the switching element;
A gas turbine power generator characterized in that the heat sink can be pulled out from the front side of the housing.

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