JP5927768B2 - Unit-type capacitor device and manufacturing method thereof - Google Patents

Description

  The present invention relates to a unit-type capacitor device that is used in a high-voltage power receiving facility or the like and integrates a series reactor and a phase advance capacitor.

  For example, in a high-voltage power receiving facility or the like, it is desirable to keep the power factor of the received power close to 100%. In general, the power factor inherent to the load is often about 60 to 70% as a lagging current. Therefore, in order to improve this power factor to 95 to 100%, a phase advance capacitor for passing a leading current is used. ing.

  On the other hand, in recent years, non-linear load characteristics occupy a specific gravity, and the load current waveform is distorted from a sine wave, that is, the ratio of harmonics included in the load current tends to increase. This increase in harmonics causes problems such as overheating of the phase advance capacitor. As a countermeasure, a series reactor is connected to the phase advance capacitor.

  This type of unit type capacitor device that integrates a series reactor and a phase-advancing capacitor contains a capacitor container that contains the phase-advanced capacitor and is filled with insulating oil, and is mounted on the capacitor container to accommodate the series reactor. And a reactor container filled with insulating oil, and an intermediate connection part that is provided between the capacitor container and the reactor container and connects the phase advance capacitor and the series reactor (for example, Patent Document 1). reference).

  As another capacitor device, there is one having a structure in which a series reactor portion is accommodated in the upper portion and a phase advance capacitor portion is accommodated in the lower portion in one capacitor container (see, for example, Patent Document 2). In this way, by accommodating the series reactor part and the phase advance capacitor part in one capacitor container, the installation area is reduced as compared with the case where the series reactor and the phase advance capacitor are separated, and the bushing (insulator) By reducing the number, the installation area and cost are reduced.

Japanese Utility Model Publication No.59-32108 Utility Model Registration No. 3127927

  By the way, in the conventional capacitor device disclosed in Patent Document 1 described above, a phase advance capacitor is housed in a capacitor container and a series reactor is housed in a reactor container, that is, an oil immersion insulation system having an external container. Since the structure is adopted, the entire apparatus is enlarged. In addition, since an intermediate connection made of a bushing (insulator) or the like is located between the capacitor container and the reactor container arranged on the capacitor container, it is difficult to make the apparatus compact. It was.

  Further, in the conventional capacitor device disclosed in Patent Document 2, the installation area and cost are reduced by reducing the installation area and the number of bushings compared to the case where the series reactor and the phase advance capacitor are separated. Is possible. However, it is necessary to provide ground insulation in the capacitor container for each of the series reactor portion and the phase advance capacitor portion, which increases the size of the entire device. In addition, since the series reactor part has a structure in which the series reactor part is housed in the capacitor container together with the phase-advancing capacitor part, there is a problem that the entire apparatus is increased in size because the heat dissipation structure of the series reactor part is required.

  The present invention has been proposed in view of the above-described problems, and an object of the present invention is to provide a unit-type capacitor device that can reduce the size and cost of the entire device.

  As technical means for achieving the above-mentioned object, the present invention is a unit-type capacitor device in which a series reactor and a phase advance capacitor are integrated, the series reactor is held by a support, and the support is connected in series. A phase advance capacitor in which a capacitor element is molded with a resin is housed inside a frame portion located below the reactor.

  In the present invention, by adopting a structure in which a phase advance capacitor in which a capacitor element is molded with a resin is accommodated inside the frame portion of the support body of the series reactor, the structure does not have a conventional external container. Therefore, it is easy to make the entire apparatus compact. In addition, since it is a complete dry type that does not employ an oil immersion insulation method with an external container, there is no concern of oil leakage.

  In the present invention, the electrical connection between the series reactor and the phase advance capacitor is derived from the insulation-molded electric wire electrically connected to the capacitor element from the outer mold part of the phase advance capacitor, and the leading end of the derived insulation-coated electric wire. The structure which connected the part to the terminal part of the series reactor is desirable. By adopting such a connection structure, a bushing (insulator) is not required as the terminal portion of the phase advance capacitor, so that the number of bushings can be reduced and the cost can be reduced.

  The phase advance capacitor in the present invention is preferably inserted into the frame portion of the support after resin molding of the capacitor element, or the capacitor element is preferably resin molded in the frame portion of the support. In the former case, the phase advance capacitor is manufactured by molding the capacitor element with resin, and after the manufacture, the phase advance capacitor is assembled to the frame portion of the support body of the series reactor. In the latter case, the phase reactor capacitor frame is used as a mold, and the capacitor element is resin-molded with the frame frame of the support so that the phase-advancing capacitor is manufactured and assembled at the same time. .

  According to the present invention, by adopting a structure in which a series reactor is held by a support, and a phase advance capacitor in which a capacitor element is molded with resin is accommodated inside a frame portion located below the series reactor of the support. Since the conventional structure does not have an external container, it is easy to realize a compact apparatus as a whole. As described above, due to the compactness of the entire device, the capacitor device can be easily installed in the panel without any space limitations when stored in the panel, and its practical value is great.

In the embodiment of the present invention, it is a perspective view showing a unit type capacitor device. It is sectional drawing which shows the unit type capacitor | condenser apparatus of FIG. It is sectional drawing which shows the phase advance capacitor assembled | attached to the frame part of the support body after resin molding of the capacitor | condenser element. It is sectional drawing which shows the phase advance capacitor assembled | attached to the frame part of the support body simultaneously with the resin mold of the capacitor | condenser element.

  An embodiment of a unit capacitor device according to the present invention will be described in detail below. In the following embodiment, a unit type capacitor device that is used in a high-voltage power receiving facility or the like and in which a series reactor and a phase advance capacitor are integrated is illustrated.

  As shown in FIGS. 1 and 2, the unit-type capacitor device in this embodiment includes a series reactor 3 in which an iron core portion 2 is passed through the center of an annular coil portion 1 and a capacitor element (not shown) made of resin. The molded phase advance capacitor 4 is integrated, and a support body 5 that holds the series reactor 3 is provided. The support 5 includes an upper mounting portion 6 having an L-shaped cross section attached to an upper portion of the core portion 2 of the series reactor 3 and a lower mounting having a U-shaped cross section attached to the lower portion of the core portion 2 of the series reactor 3. It is comprised by the part 7 and the frame part 8 which is located under the serial reactor 3 and to which the lower attachment part 7 of the serial reactor 3 was fixed. The phase-advancing capacitor 4 is housed inside the frame portion 8 located below the series reactor 3.

  In this embodiment, since the structure in which the phase advance capacitor 4 is accommodated inside the frame portion 8 is adopted, since the structure does not have an external container as in the prior art, it is easy to realize a compact apparatus as a whole. . In addition, since it is a complete dry type that does not employ an oil immersion insulation method with an external container, there is no concern of oil leakage. As described above, due to the compactness of the entire device, the capacitor device can be easily installed in the panel without any space limitations when stored in the panel, and its practical value is great. Further, since the series reactor 3 has a structure that is exposed by being integrated with the phase advance capacitor 4 at the lower mounting portion 7 of the support body 5, it is easy to radiate heat. Influencing can also be suppressed.

  For the electrical connection between the series reactor 3 and the phase advance capacitor 4, the insulation coated electric wire 9 electrically connected to the capacitor element is led out from the outer mold part 10 of the phase advance capacitor 4, and the derived insulation coated electric wire 9 is derived. Is connected to a terminal portion 11 provided in the coil portion 1 of the series reactor 3. In addition, in order to lead out the insulation coated electric wire 9 from the exterior mold part 10 of the phase advance capacitor 4, an opening 12 through which the insulation coated electric wire 9 is inserted is provided at a corresponding portion of the frame portion 8. The insulated wire 9 is electrically connected to the capacitor element when the phase-advancing capacitor 4 in which the capacitor element is molded with resin is manufactured. 2 is a lead wire connected to the terminal portion 14 of the coil portion 1 of the series reactor 3 in order to connect the capacitor device to the system.

  In this embodiment, the insulated coated electric wire 9 electrically connected to the capacitor element is led out from the outer mold part 10 of the phase advance capacitor 4, and the tip of the insulated coated electric wire 9 is connected to the terminal part 11 of the series reactor 3. By adopting such a structure, a bushing (insulator) is not required as the terminal portion of the phase advance capacitor 4, so the number of bushings can be reduced and the cost can be reduced. Moreover, since the insulation coating electric wire 9 is derived | led-out from the exterior mold part 10 of the phase advance capacitor 4, a charging part is not exposed.

  The aforementioned phase advance capacitor 4 is accommodated inside the frame 8 of the support 5 by the following means.

  First, as shown in FIG. 3, after the capacitor element is molded with resin, the phase advance capacitor 4 manufactured by the resin mold is inserted and arranged inside the frame portion 8 of the support 5 as shown in FIG. . That is, the phase advance capacitor 4 is manufactured by molding the capacitor element with resin, and the phase advance capacitor 4 is assembled to the frame portion 8 of the support 5 of the series reactor 3 after the manufacture. In this structure, since the phase advance capacitor 4 and the frame portion 8 are separate bodies, a slight gap t is formed between the exterior mold portion 10 of the phase advance capacitor 4 and the inner peripheral surface of the frame portion 8. Is done.

  As a second means, as shown in FIG. 4, the phase advance capacitor 4 is manufactured by resin-molding the capacitor element with the frame portion 8 of the support 5. That is, by using the frame portion 8 of the support 5 as a mold and resin molding the capacitor element with the frame portion 8, the phase advance capacitor 4 is manufactured and assembled at the same time. In the case of this structure, the phase advance capacitor 4 and the frame portion 8 are integrated, so that there is no gap between the exterior mold portion 10 of the phase advance capacitor 4 and the inner peripheral surface of the frame portion 8. It is in close contact.

  The present invention is not limited to the above-described embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. It includes the equivalent meanings recited in the claims and the equivalents recited in the claims, and all modifications within the scope.

3 Series Reactor 4 Phase Advancing Capacitor 5 Support Body 8 Frame Part 9 Insulated Coated Wire 10 Exterior Molded Part 11 Terminal Part

Claims (2)

  A method of manufacturing a unit-type capacitor device in which a series reactor and a phase-advancing capacitor are integrated, wherein the series reactor is held by a support, and a frame portion located below the series reactor of the support is used as a mold. The phase-advanced capacitor is housed and disposed in the frame part by simultaneously manufacturing and assembling the phase-advanced capacitor by resin molding a capacitor element in the frame part. Manufacturing method of capacitor device. A integral units form a capacitor device and a series reactor and phase advancing capacitor, said series reactor was held at the support, Oite inside of the frame portion located below the series reactor of the support, the advanced The phase capacitor is a unit-type capacitor device characterized in that a capacitor element and the frame portion are integrated by a resin mold .

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