Load testing system

Abstract

Provided is a load test system capable of safely performing a load test of a power supply to be tested. A load test system is provided with a plurality of sets of load test devices, each load test device having a first load test unit including one or more resistor units and a first circuit breaking device. Power is supplied from a power supply to be tested to at least one of the one or more resistor units by at least the first circuit breaking device and a circuit breaking unit that is separate from the load testing device. The circuit breaking unit performs on-off control of power supply to at least one of the plurality of sets of load testing devices. The first circuit breaking device performs on / off control of power supply to at least one resistor unit connected to the first circuit breaking device among the one or more resistor units.

Description

Technical Field

[0001] The present invention relates to a load testing system and the like. Background Art

[0002] Conventionally, a load test device has been proposed as disclosed in Patent Document 1.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2000-019231 Summary of the Invention

[0006] However, the safety of performing a load test on a power supply under test is not sufficient.

[0007] Therefore, an object of the present invention is to provide a load testing system capable of safely performing a load test on a power supply of a test object.

[0008] A load testing system according to the present invention includes a plurality of load testing devices. The load testing devices include a first load testing section including one or more resistance units and a first disconnecting device.

[0009] Power is supplied from a test target power supply to at least one of the one or more resistance units via at least a disconnecting portion separate from the load test device and the first disconnecting device.

[0010] The disconnecting unit performs on-off control of power supply to at least one of the plurality of load test devices.

[0011] The first circuit breaker device performs on / off control of power supply to at least the resistance unit connected to the first circuit breaker device among the one or more resistance units.

[0012] Since power is supplied from the power supply under test to the resistor group by means of multiple disconnecting mechanisms, even if one disconnecting mechanism fails, the possibility of erroneous power supply to the resistor group can be reduced, and the load test of the power supply under test can be performed safely.

[0013] Preferably, the one or more resistance units include a first U-phase resistance unit, a second U-phase resistance unit, a third U-phase resistance unit, a first V-phase resistance unit, a second V-phase resistance unit, a third V-phase resistance unit, a first W-phase resistance unit, a second W-phase resistance unit, and a third W-phase resistance unit.

[0014] The load testing device includes: a first load testing section, which includes the first U-phase resistance unit, the second U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the first W-phase resistance unit, the second W-phase resistance unit and the first circuit breaker; and a second load testing section, which includes the third U-phase resistance unit, the third V-phase resistance unit and the third W-phase resistance unit.

[0015] Power is supplied from the test object power supply to the first U-phase resistor unit, the second U-phase resistor unit, the first V-phase resistor unit, the second V-phase resistor unit, the first W-phase resistor unit, and the second W-phase resistor unit by means of at least the circuit breaker and the first circuit breaker device.

[0016] Power is supplied from the test object power supply to the third U-phase resistance unit, the third V-phase resistance unit, and the third W-phase resistance unit via at least the disconnecting portion and the first disconnecting device or the second disconnecting device provided in the second load test unit.

[0017] The resistor group of each resistance unit includes a large-capacity resistor, thereby enabling safe load testing of a high-voltage power supply under test.

[0018] In particular, there is no need to step down the voltage of the electric power from the power supply under test using a transformer or the like.

[0019] Therefore, compared with a load test involving voltage reduction using a transformer or the like, power can be supplied to each load test unit using a thinner power supply cable.

[0020] Furthermore, compared to a method involving voltage reduction using a transformer or the like, a load test can be performed in a state close to actual use.

[0021] In addition, the first load testing unit and the second load testing unit can be used for different load tests, or can be used for integrated load testing.

[0022] More preferably, the resistors of the resistor group of each of the one or more resistor units extend along the x-direction.

[0023] The first U-phase resistance unit, the second U-phase resistance unit, the third U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the third V-phase resistance unit, the first W-phase resistance unit, the second W-phase resistance unit, and the third W-phase resistance unit are arranged in the y direction perpendicular to the x direction.

[0024] A surface of a holding frame that holds the resistor group of each of the one or more resistor units, which surface holds the terminals of the resistors, is covered with a detachable transparent cover.

[0025] It is possible to suppress adhesion of dust and the like to the end portions of the resistor terminals.

[0026] Furthermore, even if dust or the like adheres, it can be easily visually confirmed from the outside and can be easily removed.

[0027] Furthermore, preferably, the resistors of the resistor group of each of the one or more resistor units extend along the x-direction.

[0028] The first U-phase resistance unit, the second U-phase resistance unit, the third U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the third V-phase resistance unit, the first W-phase resistance unit, the second W-phase resistance unit, and the third W-phase resistance unit are arranged in the y direction perpendicular to the x direction.

[0029] At least the first U-phase resistance unit includes a cooling portion that cools the resistor group of the first U-phase resistance unit.

[0030] The cooling unit of the first U-phase resistance unit includes two cooling fans arranged in the x-direction.

[0031] The cooling portion of the first U-phase resistance unit is provided with a guide wall having an inclined surface.

[0032] The guide wall guides the cooling air from one of the cooling fans toward the vicinity of the rotation axis of the one cooling fan, and guides the cooling air from the other cooling fan toward the vicinity of the rotation axis of the other cooling fan.

[0033] The direction in which the cooling air flows can be easily controlled, thereby making it easy to supply the cooling air to a wide area including the region where the resistor group including the long resistors is located.

[0034] In addition, preferably, the one or more resistance units include the first U-phase resistance unit, the second U-phase resistance unit, the third U-phase resistance unit, the fourth U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the third V-phase resistance unit, the fourth V-phase resistance unit, the first W-phase resistance unit, the second W-phase resistance unit, the third W-phase resistance unit, and the fourth W-phase resistance unit.

[0035] The first U-phase resistance unit and the second U-phase resistance unit are arranged in the x-direction.

[0036] The first V-phase resistance unit and the second V-phase resistance unit are arranged in the x-direction.

[0037] The first W-phase resistance unit and the second W-phase resistance unit are arranged in the x-direction.

[0038] The third U-phase resistance unit and the fourth U-phase resistance unit are arranged in the x-direction.

[0039] The third V-phase resistance unit and the fourth V-phase resistance unit are arranged in the x-direction.

[0040] The third W-phase resistance unit and the fourth W-phase resistance unit are arranged in the x-direction.

[0041] The first U-phase resistor unit, the first V-phase resistor unit, the first W-phase resistor unit, the third U-phase resistor unit, the third V-phase resistor unit, and the third W-phase resistor unit are arranged in a y-direction perpendicular to the x-direction.

[0042] The second U-phase resistance unit, the second V-phase resistance unit, the second W-phase resistance unit, the fourth U-phase resistance unit, the fourth V-phase resistance unit, and the fourth W-phase resistance unit are arranged in the y direction.

[0043] The area including the first U-phase resistance unit, the second U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the first W-phase resistance unit and the second W-phase resistance unit is arranged between: the area including the first circuit breaker device and the area including the third U-phase resistance unit, the fourth U-phase resistance unit, the third V-phase resistance unit, the fourth V-phase resistance unit, the third W-phase resistance unit and the fourth W-phase resistance unit.

[0044] The y-direction interval between the first U-phase resistor unit and the first V-phase resistor unit, and the y-direction interval between the first W-phase resistor unit and the third U-phase resistor unit are larger than the y-direction interval between the first V-phase resistor unit and the first W-phase resistor unit.

[0045] The load test device can be stored in a 40-foot container while ensuring sufficient electrical isolation.

[0046] Furthermore, an operator can enter an area with a large distance in the y direction, such as between the first U-phase resistance unit and the first V-phase resistance unit, to perform maintenance or other work.

[0047] In addition, preferably, the one or more resistance units include the first U-phase resistance unit, the second U-phase resistance unit, the third U-phase resistance unit, the fourth U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the third V-phase resistance unit, the fourth V-phase resistance unit, the first W-phase resistance unit, the second W-phase resistance unit, the third W-phase resistance unit, and the fourth W-phase resistance unit.

[0048] The first U-phase resistance unit and the second U-phase resistance unit are arranged in the x-direction.

[0049] The first V-phase resistance unit and the second V-phase resistance unit are arranged in the x-direction.

[0050] The first W-phase resistance unit and the second W-phase resistance unit are arranged in the x-direction.

[0051] The third U-phase resistance unit and the fourth U-phase resistance unit are arranged in the x-direction.

[0052] The third V-phase resistance unit and the fourth V-phase resistance unit are arranged in the x-direction.

[0053] The third W-phase resistance unit and the fourth W-phase resistance unit are arranged in the x-direction.

[0054] The first U-phase resistor unit, the first V-phase resistor unit, the first W-phase resistor unit, the third U-phase resistor unit, the third V-phase resistor unit, and the third W-phase resistor unit are arranged in a y-direction perpendicular to the x-direction.

[0055] The second U-phase resistance unit, the second V-phase resistance unit, the second W-phase resistance unit, the fourth U-phase resistance unit, the fourth V-phase resistance unit, and the fourth W-phase resistance unit are arranged in the y direction.

[0056] The resistors of the resistor groups of each of the first U-phase resistance unit, the second U-phase resistance unit, the third U-phase resistance unit, the fourth U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the third V-phase resistance unit, the fourth V-phase resistance unit, the first W-phase resistance unit, the second W-phase resistance unit, the third W-phase resistance unit, and the fourth W-phase resistance unit extend along the y direction.

[0057] The spacing between the retaining frame of the resistor group holding the first U-phase resistor unit and the retaining frame of the resistor group holding the first V-phase resistor unit, the spacing between the retaining frame of the first V-phase resistor unit and the retaining frame of the resistor group holding the first W-phase resistor unit, the spacing between the retaining frame of the resistor group holding the third U-phase resistor unit and the retaining frame of the third V-phase resistor unit, and the spacing between the retaining frame of the third V-phase resistor group and the retaining frame of the resistor group holding the third W-phase resistor unit are 80% of the width of the retaining frame of the first U-phase resistor unit in the y direction.

[0058] The interval between adjacent holding frames is approximately 80% of the length of the resistor R in the longitudinal direction, which is substantially the same as the length of the holding frame.

[0059] This makes it possible to adequately ensure electrical isolation, accommodate the load test device in a container of a predetermined size, and easily remove the resistor extending in the y direction from between the holding frames.

[0060] More preferably, the area including the first circuit breaker device is arranged between: an area including the first U-phase resistance unit, the second U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the first W-phase resistance unit and the second W-phase resistance unit, and an area including the third U-phase resistance unit, the fourth U-phase resistance unit, the third V-phase resistance unit, the fourth V-phase resistance unit, the third W-phase resistance unit and the fourth W-phase resistance unit.

[0061] By arranging the region including the first circuit breaker device in the center in the y direction and arranging the regions including the first U-phase resistor unit and the third U-phase resistor unit on both sides thereof, the weight balance in the longitudinal direction of one container can be improved.

[0062] In addition, preferably, each of the one or more resistor units includes: a resistor group; a holding frame that holds the resistor group; and a cooling unit that cools the resistor group.

[0063] The resistor group includes a plurality of resistors.

[0064] The plurality of resistors are arranged at least in a first direction perpendicular to a direction in which the cooling portion and the holding frame are arranged.

[0065] In a region including a line extending from a rotation axis of a cooling fan of the cooling unit and the center in the first direction of the region where the plurality of resistors are arranged, the resistors are arranged at larger intervals than in other regions of the region where the plurality of resistors are arranged.

[0066] Compared to a configuration in which the resistors are arranged at equal intervals in the first direction, cooling air is more likely to flow in the region including the rotation axis.

[0067] In addition, preferably, each of the one or more resistor units includes a holding frame for holding the resistor group.

[0068] A protrusion for diffusing cooling air is formed on the inner wall of the holding frame.

[0069] The projection changes the direction of the cooling air flow, making it easier for the cooling air to diffuse inside the holding frame.

[0070] Furthermore, preferably, each of the one or more resistor units includes: a holding frame that holds the resistor group; and a cooling unit that cools the resistor group.

[0071] The cooling unit includes a plurality of cooling fans.

[0072] The plurality of cooling fans are arranged in a state of being inclined with respect to a plane perpendicular to a direction in which the cooling unit and the holding frame are arranged so that cooling air strikes a region including the resistor group.

[0073] The cooling air from the plurality of cooling fans collides with the region including the resistor group, and the direction of the cooling air flow changes, so that the cooling air easily diffuses inside the holding frame.

[0074] In addition, preferably, the load test system further includes a control unit that is wiredly connected to each of the plurality of load test devices and transmits a control signal to each of the plurality of load test devices.

[0075] The operation control of multiple load test devices (multiple load test units) can be centrally managed by a single control unit C1. Furthermore, since the connection is wired, the operation control of multiple load test devices (multiple load test units) can be reliably performed even at safely remote locations, as long as the connection is not physically disconnected.

[0076] In addition, preferably, each of the one or more resistance units includes a cooling portion for cooling the resistor group.

[0077] The cooling unit includes a cooling fan driven by power from the test object power supply.

[0078] The first disconnecting device is provided with a power storage unit for storing electric power from the test object power supply.

[0079] The power storage unit drives the cooling fan when the power supply from the test object power supply is cut off.

[0080] Each part of the load test device can be driven using the power from the power supply under test without providing an auxiliary power supply separate from the power supply under test.

[0081] In particular, even when the power supply from the test object power supply is cut off, the cooling fan and the like can be driven stably.

[0082] In addition, preferably, the multiple sets of load testing devices include at least a first load testing device, a second load testing device, a third load testing device, a fourth load testing device, and a fifth load testing device.

[0083] The disconnecting portion includes at least a first disconnecting portion and a second disconnecting portion.

[0084] Power is supplied from the test target power supply to the first load test device, the second load test device, and the third load test device via at least the first disconnecting unit.

[0085] Power is supplied from the test object power supply to the fourth load test device and the fifth load test device via at least the second disconnecting unit.

[0086] Multiple disconnects are provided, and each of these disconnects is connected to two or three load test devices. Therefore, compared to a system where a single disconnect is connected to multiple load test devices, the load test system of the present invention can be constructed using disconnects with smaller capacities. Furthermore, if a disconnect fails, the number of load test devices affected can be reduced.

[0087] In addition, preferably, each of the one or more resistor units includes: a resistor group; a holding frame that holds the resistor group; a cooling unit that cools the resistor group; and an insulating member disposed between the holding frame and the cooling unit.

[0088] The insulating member and the cooling unit are mounted using a first mounting member.

[0089] The insulating member and the holding frame are mounted using a second mounting member that is different from the first mounting member.

[0090] The insulating member can be simply and reliably fixed between the leg portion and the holding frame, for example.

[0091] Furthermore, compared to a method of directly attaching the insulating member to the holding frame or the like without using a mounting hardware, it is possible to simply replace the insulating member with a new one.

[0092] More preferably, each of the one or more resistance units includes a shield including a first insulating plate and a second insulating plate.

[0093] The first insulating plate is mounted on the cooling unit using a third mounting metal member that is different from the first mounting metal member and the second mounting metal member.

[0094] The second insulating plate is mounted on the cooling portion via the first mounting member.

[0095] The distal end of the shield is located inside the holding frame.

[0096] The cooling air from the cooling unit can be supplied to the inside of the holding frame without leaking to the outside while ensuring insulation.

[0097] The members (the first insulating plate and the second insulating plate) constituting the shield can be easily attached and detached via the members (the first mounting member and the third mounting member) for fixing the insulating member.

[0098] In addition, preferably, the cooling part includes a pressure fan type cooling fan, and the cooling fan includes a socket.

[0099] Even with a smaller air intake space, it is easy to send cooling air into the resistor group.

[0100] Furthermore, preferably, power is supplied from the test object power supply to at least one of the one or more resistance units via at least the disconnecting portion, the first disconnecting device, and a switching device of the one or more resistance units.

[0101] The switching device performs on-off control of power supply to each of the one or more resistance units, or performs on-off control of power supply to each of a plurality of resistor groups provided in each of the one or more resistance units.

[0102] Since power is supplied from the test target power supply to the resistor group by means of multiple disconnecting mechanisms (disconnecting parts, interrupting devices, switching devices), the possibility of erroneous power supply to the resistor group can be reduced even if one disconnecting mechanism fails.

[0103] In addition, preferably, the one or more resistance units are composed of one resistance unit.

[0104] The housings of the plurality of sets of the load test devices each hold the resistor group of the single resistance unit.

[0105] Effects of the Invention

[0106] As described above, according to the present invention, it is possible to provide a load test system capable of safely performing a load test on a power supply under test. BRIEF DESCRIPTION OF THE DRAWINGS

[0107] Figure 1 It is a structural diagram of the load test system of the first embodiment.

[0108] Figure 2 This is a structural diagram of the first load test device and the first disconnecting unit of the first embodiment.

[0109] Figure 3 1 is a diagram showing the internal structure of the first U-phase resistance unit as viewed from the y direction.

[0110] Figure 4 1 is a diagram showing the internal structure of the first U-phase resistance unit as viewed from the x direction.

[0111] Figure 5 14 is a diagram showing the internal structure of the first U-phase resistance unit including a plurality of eleventh U-phase cooling fans arranged obliquely.

[0112] Figure 6 It is a diagram showing the internal structure of the eleventh casing and the twelfth casing as viewed from the x direction.

[0113] Figure 7 1 is a diagram showing the internal structure of the twelfth casing as viewed from the y direction.

[0114] Figure 8 It is a structural diagram of a load test system according to the second embodiment.

[0115] Figure 9 It is a structural diagram of the first load test device and the first disconnecting unit according to the second embodiment.

[0116] Figure 10 It is a structural diagram of a load test system according to the third embodiment.

[0117] Figure 11 It is a structural diagram of the first load test device and the first disconnecting unit according to the third embodiment.

[0118] Figure 12 1 and 2 are diagrams showing the internal structures of the eleventh housing, the twelfth housing, and the twenty-second housing according to the third embodiment, as viewed from the x direction.

[0119] Figure 13 It is a structural diagram of the first load test device and the first disconnecting unit according to the fourth embodiment.

[0120] Figure 14 1 and 2 are diagrams showing the internal structures of the eleventh housing, the twelfth housing, and the twenty-second housing according to the fourth embodiment, as viewed from the x direction.

[0121] Figure 151 and 2 are diagrams showing the internal structure of the twelfth casing according to the fourth embodiment, as viewed from the y direction.

[0122] Figure 16 4 is a structural diagram of a first untestable portion and a first disconnecting portion in a fifth embodiment.

[0123] Figure 17 1 and 2 are diagrams showing the internal structures of the eleventh housing, the twelfth housing, and the twenty-second housing according to the fifth embodiment, as viewed from the x direction.

[0124] Figure 18 It is a structural diagram of a load test system according to the sixth embodiment. DETAILED DESCRIPTION

[0125] Hereinafter, the first embodiment will be described with reference to the drawings.

[0126] In addition, the embodiment is not limited to the following embodiment. In addition, the content described in one embodiment is also applicable to other embodiments in principle. In addition, each embodiment and each modification can be appropriately combined.

[0127] (Load test system 1)

[0128] The load test system 1 of the first embodiment includes load test devices (first to twelfth load test devices A1 to A12 ), a control unit C1 , and disconnecting units (first to fourth disconnecting units D1 to D4 ).

[0129] In order to illustrate the directions, the vertical direction in which the first U-phase resistance unit U1 and the second U-phase resistance unit U2 are arranged is defined as the x-direction (the short side direction of the container), the horizontal direction in which the first U-phase resistance unit U1, the first V-phase resistance unit V1 and the first W-phase resistance unit W1 are arranged is defined as the y-direction (the long side direction of the container), and the up and down direction perpendicular to the x-direction and the y-direction is defined as the z-direction (the height direction of the container).

[0130] In addition, Figure 2 and the following Figure 9 、 Figure 11 、 Figure 13 and Figure 16 In the figure, illustration of power supply cables and control signal cables to load test devices other than the first load test device A1 (the second load test device A2 and the like) is omitted.

[0131] In addition, in the following Figure 15 and Figure 17 In FIG. 1 , only one resistor provided in the first U-phase resistance unit U1 is shown by a dotted line.

[0132] (First load test device A1 to twenty-fourth load test device A24)

[0133] The first load testing device A1 includes a first load testing portion B1 and a second load testing portion B2 .

[0134] The second load testing device A2 includes a third load testing section B3 and a fourth load testing section B4.

[0135] The third load testing device A3 includes a fifth load testing section B5 and a sixth load testing section B6.

[0136] The fourth load testing device A4 includes a seventh load testing section B7 and an eighth load testing section B8.

[0137] The fifth load testing device A5 includes a ninth load testing section B9 and a tenth load testing section B10 .

[0138] The sixth load testing device A6 includes an eleventh load testing section B11 and a twelfth load testing section B12 .

[0139] The seventh load testing device A7 includes a thirteenth load testing section B13 and a fourteenth load testing section B14.

[0140] The eighth load testing device A8 includes a fifteenth load testing section B15 and a sixteenth load testing section B16 .

[0141] The ninth load testing device A9 includes a seventeenth load testing section B17 and an eighteenth load testing section B18 .

[0142] The tenth load testing device A10 includes a nineteenth load testing section B19 and a twentieth load testing section B20 .

[0143] The eleventh load testing device A11 includes a twenty-first load testing section B21 and a twenty-second load testing section B22 .

[0144] The twelfth load testing device A12 includes a twenty-third load testing section B23 and a twenty-fourth load testing section B24 .

[0145] (Control Unit C1)

[0146] The control unit C1 and the load test devices (the first to twelfth load test devices A1 to A12 ) are configured as separate bodies.

[0147] The control unit C1 is provided with an operation unit for selecting a load test device to which power is supplied from the test target power supply 100 .

[0148] The control unit C1 uses a control signal cable (see Figure 1 、 Figure 2The first control device 11 and the second control device 12 are connected to the control unit of each load test unit by wire (dashed line), and a control signal is sent to the control unit of each load test unit.

[0149] (Effect of providing the control unit C1 separately from the load test device)

[0150] The operation control of multiple load test devices (multiple load test units) can be centrally managed by a single control unit C1. Furthermore, since the connection is wired, the operation control of multiple load test devices (multiple load test units) can be reliably performed even at safely remote locations, as long as the connection is not physically disconnected.

[0151] However, an operating unit may be provided for each load test device or each load test unit instead of or in addition to the operating unit of the control unit C1 .

[0152] (First disconnecting portion D1)

[0153] The first breaker D1 includes a vacuum circuit breaker (VCB) and is connected to the test object power supply 100 on the input side and to the breaker devices (first breaker 15 and second breaker 16) of the first to third load test devices A1 to A3 on the output side.

[0154] The first disconnecting unit D1 performs on-off control of the power supply to the first to third load testing devices A1 to A3.

[0155] The power supplied from the test object power supply 100 is supplied to the resistor group of the first load test unit B1 via the first disconnecting unit D1 and the first disconnecting device 15 of the first load test device A1.

[0156] The power supplied from the test object power supply 100 is supplied to the resistor group of the second load test unit B2 via the first disconnecting unit D1 and the second disconnecting device 16 of the first load test device A1.

[0157] The power supplied from the test target power supply 100 is supplied to the resistor group of the third load test unit B3 via the first disconnecting unit D1 and the first disconnecting device (not shown) of the second load test device A2.

[0158] The power supplied from the test object power supply 100 is supplied to the resistor group of the fourth load test unit B4 via the first disconnecting unit D1 and the second disconnecting device (not shown) of the second load test device A2.

[0159] The power supplied from the test object power supply 100 is supplied to the resistor group of the fifth load test unit B5 via the first disconnecting unit D1 and the first disconnecting device (not shown) of the third load test device A3.

[0160] The power supplied from the test object power supply 100 is supplied to the resistor group of the sixth load test unit B6 via the first disconnecting unit D1 and the second disconnecting device (not shown) of the third load test device A3.

[0161] (Second disconnecting portion D2)

[0162] The second circuit breaker D2 includes a vacuum circuit breaker, is connected to the test object power supply 100 on the input side, and is connected to the circuit breaker devices of the fourth to sixth load test devices A4 to A6 on the output side.

[0163] The second disconnecting unit D2 performs on-off control of the power supply to the fourth to sixth load test devices A4 to A6.

[0164] The power supplied from the test object power supply 100 is supplied to the resistor group of the seventh load test unit B7 via the second disconnecting unit D2 and the first disconnecting device (not shown) of the fourth load test device A4.

[0165] The power supplied from the test object power supply 100 is supplied to the resistor group of the eighth load test unit B8 via the second disconnecting unit D2 and the second disconnecting device (not shown) of the fourth load test device A4.

[0166] The power supplied from the test object power supply 100 is supplied to the resistor group of the ninth load test unit B9 via the second disconnecting unit D2 and the first disconnecting device (not shown) of the fifth load test device A5.

[0167] The power supplied from the test object power supply 100 is supplied to the resistor group of the tenth load test unit B10 via the second disconnecting unit D2 and the second disconnecting device (not shown) of the fifth load test device A5.

[0168] The power supplied from the test object power supply 100 is supplied to the resistor group of the eleventh load test unit B11 via the second disconnecting unit D2 and the first disconnecting device (not shown) of the sixth load test device A6.

[0169] The power supplied from the test object power supply 100 is supplied to the resistor group of the twelfth load test unit B12 via the second disconnecting unit D2 and the second disconnecting device (not shown) of the sixth load test device A6.

[0170] (Third disconnecting portion D3)

[0171] The third circuit breaker D3 includes a vacuum circuit breaker, is connected to the test object power supply 100 on the input side, and is connected to the circuit breaker devices of the seventh to ninth load test devices A7 to A9 on the output side.

[0172] The third disconnecting unit D3 performs on-off control of the power supply to the seventh to ninth load testing devices A7 to A9.

[0173] The power supplied from the test object power supply 100 is supplied to the resistor group of the thirteenth load test unit B13 via the third disconnecting unit D3 and the first disconnecting device (not shown) of the seventh load test device A7.

[0174] The power supplied from the test object power supply 100 is supplied to the resistor group of the fourteenth load test unit B14 via the third disconnecting unit D3 and the second disconnecting device (not shown) of the seventh load test device A7.

[0175] The power supplied from the test object power supply 100 is supplied to the resistor group of the fifteenth load test unit B15 via the third disconnecting unit D3 and the first disconnecting device (not shown) of the eighth load test device A8.

[0176] The power supplied from the test object power supply 100 is supplied to the resistor group of the sixteenth load test unit B16 via the third disconnecting unit D3 and the second disconnecting device (not shown) of the eighth load test device A8.

[0177] The power supplied from the test object power supply 100 is supplied to the resistor group of the seventeenth load test unit B17 via the third breaker unit D3 and the first breaker unit (not shown) of the ninth load test unit A9.

[0178] The power supplied from the test object power supply 100 is supplied to the resistor group of the eighteenth load test unit B18 via the third disconnecting unit D3 and the second disconnecting unit (not shown) of the ninth load test device A9.

[0179] (Fourth disconnecting portion D4)

[0180] The fourth circuit breaker D4 includes a vacuum circuit breaker, is connected to the test object power supply 100 on the input side, and is connected to the circuit breaker devices of the tenth to twelfth load test devices A10 to A12 on the output side.

[0181] The fourth disconnecting unit D4 performs on / off control of the power supply to the tenth to twelfth load testing devices A10 to A12.

[0182] The power supplied from the test object power supply 100 is supplied to the resistor group of the nineteenth load test unit B19 via the fourth breaker unit D4 and the first breaker unit (not shown) of the tenth load test device A10.

[0183] The power supplied from the test object power supply 100 is supplied to the resistor group of the twentieth load test unit B20 via the fourth disconnecting unit D4 and the second disconnecting unit (not shown) of the tenth load test unit A10.

[0184] The power supplied from the test object power supply 100 is supplied to the resistor group of the twenty-first load test unit B21 via the fourth disconnecting unit D4 and the first disconnecting device (not shown) of the eleventh load test device A11.

[0185] The power supplied from the test object power supply 100 is supplied to the resistor group of the twenty-second load test unit B22 via the fourth disconnecting unit D4 and the second disconnecting unit (not shown) of the eleventh load test device A11.

[0186] The power supplied from the test object power supply 100 is supplied to the resistor group of the twenty-third load test unit B23 via the fourth disconnecting unit D4 and the first disconnecting device (not shown) of the twelfth load test device A12.

[0187] The power supplied from the test object power supply 100 is supplied to the resistor group of the twenty-fourth load test unit B24 via the fourth disconnecting unit D4 and the second disconnecting device (not shown) of the twelfth load test device A12.

[0188] (Effect of setting multiple circuit breaker mechanisms)

[0189] The power supply from the test object power supply 100 to the resistor group is carried out with the help of multiple circuit breaker mechanisms (circuit breaker parts, circuit breaker devices, and switching devices described later). Therefore, even if there is a malfunction in one of the circuit breaker mechanisms, the possibility of erroneous power supply to the resistor group can be reduced, and the load test of the test object power supply 100 can be safely carried out.

[0190] Furthermore, the load test system 1 of the present invention can be easily formed by providing a plurality of existing load test devices including breaker devices (such as the first breaker device 15 ) and switch devices and further providing breaker units (such as the first breaker unit D1 ).

[0191] (Effect of setting multiple circuit breakers)

[0192] Multiple disconnects (first disconnect D1 through fourth disconnect D4) are provided, each of which is connected to two or three load test devices. This allows the load test system of the present invention to be constructed using disconnects with smaller capacity, compared to a system in which a single disconnect is connected to multiple load test devices. Furthermore, if a disconnect fails, the number of load test devices affected can be reduced.

[0193] (First load test section B1)

[0194] The first load test unit B1 includes 6 resistance units (first U-phase resistance unit U1, second U-phase resistance unit U2, first V-phase resistance unit V1, second V-phase resistance unit V2, first W-phase resistance unit W1, second W-phase resistance unit W2), a control unit (first control device 11) and a circuit breaker device (first circuit breaker device 15).

[0195] Each of the first U-phase resistance unit U1 and the second U-phase resistance unit U2 includes a plurality of resistor groups and a cooling unit that supplies cooling air to the plurality of resistor groups.

[0196] The resistor group of the first U-phase resistance unit U1 and the resistor group of the second U-phase resistance unit U2 are connected in series. However, the resistor group of the first U-phase resistance unit U1 and the resistor group of the second U-phase resistance unit U2 may be connected in parallel.

[0197] The power from the R-phase terminal of the test object power supply 100 is supplied to the resistor group of the first U-phase resistance unit U1 and the second U-phase resistance unit U2 via the first disconnecting portion D1 and the first disconnecting device 15 .

[0198] The cooling units of the first U-phase resistance unit U1 and the second U-phase resistance unit U2 are supplied with electric power from an auxiliary power supply different from the test target power supply 100 .

[0199] However, the power from the test object power supply 100 may be supplied to the cooling units of the first U-phase resistance unit U1 and the second U-phase resistance unit U2 .

[0200] Next, the configuration of the resistor group and the cooling unit of the first U-phase resistor unit U1 will be described (see FIG. Figure 3 、 Figure 4 ).

[0201] A case will be described where the resistor group of the first U-phase resistance unit U1 is the eleventh U-phase resistance group UR11 , the cooling unit of the first U-phase resistance unit U1 is the eleventh U-phase cooling unit UC11 , and the cooling fan of the eleventh U-phase cooling unit UC11 is the eleventh U-phase cooling fan UF11 .

[0202] In addition, the case where the resistor group of the second U-phase resistance unit U2 is the twelfth U-phase resistor group UR12, the cooling unit of the second U-phase resistance unit U2 is the twelfth U-phase cooling unit UC12, and the cooling fan of the twelfth U-phase cooling unit UC12 is the twelfth U-phase cooling fan UF12 is described.

[0203] In addition, a case will be described where the resistor group of the first V-phase resistor unit V1 is the eleventh V-phase resistor group VR11, the cooling unit of the first V-phase resistor unit V1 is the eleventh V-phase cooling unit VC11, and the cooling fan of the eleventh V-phase cooling unit VC11 is the eleventh V-phase cooling fan VF11.

[0204] Furthermore, a case will be described where the resistor group of the first W-phase resistor unit W1 is the eleventh W-phase resistor group WR11 , the cooling portion of the first W-phase resistor unit W1 is the eleventh W-phase cooling portion WC11 , and the cooling fan of the eleventh W-phase cooling portion WC11 is the eleventh W-phase cooling fan WF11 .

[0205] In addition, the structures of the twelfth U-phase resistor group UR12 of the second U-phase resistor unit U2, the eleventh V-phase resistor group VR11 of the first V-phase resistor unit V1, the resistor group of the second V-phase resistor unit V2, the eleventh W-phase resistor group WR11 of the first W-phase resistor unit W1, and the resistor group of the second W-phase resistor unit W2 are the same as the structure of the eleventh U-phase resistor group UR11 of the first U-phase resistor unit U1.

[0206] In addition, the structures of the twelfth U-phase cooling part UC12 of the second U-phase resistance unit U2, the eleventh V-phase cooling part VC11 of the first V-phase resistance unit V1, the cooling part of the second V-phase resistance unit V2, the eleventh W-phase cooling part WC11 of the first W-phase resistance unit W1, and the cooling part of the second W-phase resistance unit W2 are the same as the structure of the eleventh U-phase cooling part UC11 of the first U-phase resistance unit U1.

[0207] In addition, the structures of the twelfth U-phase cooling fan UF12 of the second U-phase resistance unit U2, the eleventh V-phase cooling fan VF11 of the first V-phase resistance unit V1, the cooling fan of the second V-phase resistance unit V2, the eleventh W-phase cooling fan WF11 of the first W-phase resistance unit W1, and the cooling fan of the second W-phase resistance unit W2 are the same as the structure of the eleventh U-phase cooling fan UF11 of the first U-phase resistance unit U1.

[0208] (Structure of the Eleventh U-Phase Cooling Unit UC11)

[0209] The eleventh U-phase cooling unit UC11 is arranged below the eleventh U-phase resistor group UR11 .

[0210] The eleventh U-phase cooling fan UF11 of the eleventh U-phase cooling unit UC11 takes in air from the side or below and supplies cooling air to the eleventh U-phase resistor group UR11 above.

[0211] The eleventh U-phase cooling unit UC11 holds the eleventh U-phase resistor group UR11 via an insulating member F.

[0212] The eleventh U-phase resistor group UR11 is located inside the outer shape of the eleventh U-phase cooler UC11 when viewed from the z direction.

[0213] (Insulation F Installation)

[0214] The lower portion of the insulating member F is attached to the frame of the eleventh U-phase cooler UC11, that is, the base of the eleventh U-phase cooler UC11 that holds the eleventh U-phase cooling fan UF11, via a first mounting member F1 such as a channel steel extending in the x direction.

[0215] The first mounting hardware F1 is mounted on a frame of the eleventh U-phase cooling unit UC11 , that is, a base portion of the eleventh U-phase cooling unit UC11 that holds the eleventh U-phase cooling fan UF11 .

[0216] However, the lower portion of the insulating member F may be directly attached to the frame of the eleventh U-phase cooler UC11 without the intermediary of the first mounting member F1 .

[0217] The upper portion of the insulating member F is attached to the holding frame UR11 a holding the resistors R of the eleventh U-phase resistor group UR11 via a second mounting member F2 extending in the x direction, such as an angle steel.

[0218] The second mounting hardware F2 is mounted on the holding frame UR11 a that holds the resistors R of the eleventh U-phase resistor group UR11 .

[0219] However, the upper portion of the insulating member F may be directly attached to the holding frame UR11a without intermediary of the second mounting member F2.

[0220] (The effect of mounting the insulating member on the retaining frame, etc. by means of mounting hardware)

[0221] The insulating member can be simply and reliably fixed between the leg portion and the holding frame, for example.

[0222] Furthermore, compared to a method of directly attaching the insulating member to the holding frame or the like without using a mounting hardware, it is possible to simply replace the insulating member with a new one.

[0223] (Shield)

[0224] Preferably, a substantially hollow rectangular shield is provided between the eleventh U-phase cooler UC11 and the eleventh U-phase resistor group UR11 and includes a first insulating plate IB1 perpendicular to the x-direction and a second insulating plate IB2 perpendicular to the y-direction and surrounds the cooling air flow path.

[0225] The first insulating plate IB1 is attached to the third mounting member F3 extending in the y direction by screw fastening or the like.

[0226] The third mounting hardware F3 is mounted on the frame of the eleventh U-phase cooling unit UC11 , that is, on the base of the eleventh U-phase cooling unit UC11 that holds the eleventh U-phase cooling fan UF11 .

[0227] The second insulating plate IB2 is attached to the first mounting member F1 by screw fastening or the like.

[0228] The members constituting the shield (the first insulating plate IB1 and the second insulating plate IB2 ) may be integrally formed or may be separately formed.

[0229] The distal ends (upper ends) of the members constituting the shield (first insulating plate IB1 and second insulating plate IB2) are located inside the holding frame UR11a of the eleventh U-phase resistor group UR11 and are not in contact with the holding frame UR11a.

[0230] (Effects such as setting shields)

[0231] The cooling air from the cooling unit can be supplied to the inside of the holding frame without leaking to the outside while ensuring insulation.

[0232] The members constituting the shield (the first insulating plate IB1 and the second insulating plate IB2 ) can be easily attached and detached by means of the members for fixing the insulating member F (the mounting member F1 and the third mounting member F3 ).

[0233] In addition, Figure 3 In the figure, the insulating member F, the first mounting member F1, and the second insulating plate IB2 on the front side in the y direction are omitted.

[0234] In addition, Figure 4 In FIG. 1 , the first insulating plate IB1 on the front side in the x direction is omitted from illustration.

[0235] In addition, Figure 6 、 Figure 7 、 Figure 12 、 Figure 14 、 Figure 15 、 Figure 17 In the figure, the first mounting member F1, the second mounting member F2, the third mounting member F3, the first insulating plate IB1, and the second insulating plate IB2 are omitted.

[0236] (Application Example 1 of the Eleventh U-Phase Cooling Unit UC11)

[0237] Preferably, the eleventh U-phase cooling fan UF11 has a pressure fan type structure including a bellmouth UF11c covering the outer periphery of the impeller.

[0238] (The effect of setting the socket UF11c)

[0239] Even in a configuration in which the space for taking in air below the eleventh U-phase cooling fan UF11 is small, it is easy to send cooling air into the eleventh U-phase resistor group UR11 by sucking air from the side.

[0240] Therefore, compared with a configuration in which the space for taking in air is larger below the eleventh U-phase cooling fan UF11, the size of the eleventh U-phase cooling unit UC11 and the eleventh U-phase resistor group UR11 in the direction (z direction) in which they are arranged can be suppressed.

[0241] (Structure of the Eleventh U-Phase Resistor Group UR11)

[0242] The eleventh U-phase resistor group UR11 includes a plurality of resistors R.

[0243] The resistor R extends along the y direction, and a plurality of resistors R are arranged in the x direction and the z direction.

[0244] The plurality of resistors R are arranged at regular intervals in the x-direction (first direction) and the z-direction.

[0245] However, it is preferable to use an area including the center in the x direction of the area where the plurality of resistors R are arranged (see Figure 3 The resistors R are not arranged in an area including the dotted line (the dotted line), that is, the area including the line extending from the rotation axis LX of the eleventh U-phase cooling fan UF11, so that the resistors R are arranged at a larger interval than other areas, that is, a resistor-unconfigured area NA is formed.

[0246] (Effect of setting the resistor unplaced area NA)

[0247] Compared to a configuration in which the resistors R are arranged at equal intervals in the x direction, cooling air is more likely to flow in a region including the rotation axis LX.

[0248] In addition, preferably, a protrusion UR11b protruding inward is formed on the inner wall of the holding frame UR11a that holds the resistors R of the eleventh U-phase resistor group UR11.

[0249] (Effect of Protrusion UR11b on the Inner Wall of Retention Frame UR11a)

[0250] The direction of the cooling air flow is changed by the protrusion UR11b, so that the cooling air easily diffuses inside the holding frame UR11a.

[0251] In the first embodiment, an example is described in which the resistor R extends in the y direction and a plurality of resistors R are arranged in the x and z directions. However, as will be described in the fourth embodiment below, a configuration in which the resistor R extends in the x direction and a plurality of resistors R are arranged in the y and z directions may also be employed. Alternatively, a configuration in which the resistor R extends in the z direction and a plurality of resistors R are arranged in the x and y directions may also be employed.

[0252] The resistor R is not limited to a rod-shaped structure extending in a straight line, and may be configured in other shapes such as a U-shape.

[0253] In the first embodiment, the eleventh U-phase cooler UC11 and the eleventh U-phase resistor group UR11 are arranged in the z direction. However, the eleventh U-phase cooler UC11 and the eleventh U-phase resistor group UR11 may be arranged in the x direction or the y direction.

[0254] (Application Example 2 of the Eleventh U-Phase Cooling Unit UC11)

[0255] The eleventh U-phase cooling fan UF11 may be composed of a single fan, but may also be composed of a plurality of fans arranged obliquely (see FIG. Figure 5 ).

[0256] Specifically, the two eleventh U-phase cooling fans UF11a and UF11b are arranged so that the cooling air is directed obliquely upward and intersects the center of the region including the eleventh U-phase resistor group UR11 in the x direction and the center in the y direction when viewed from the z direction.

[0257] That is, the two eleventh U-phase cooling fans UF11a and UF11b and other cooling fans are arranged in an inclined state with respect to the xy plane perpendicular to the z direction in which the eleventh U-phase cooling unit UC11 and the holding frame UR11a of the first U-phase resistor group UR11 are arranged.

[0258] (The effect of arranging the cooling fan in an inclined position)

[0259] The cooling air from the two eleventh U-phase cooling fans UF11a and UF11b collides with the region including the eleventh U-phase resistor group UR11, changing the direction of the cooling air flow and making it easier for the cooling air to diffuse inside the holding frame UR11a.

[0260] Furthermore, the number of the eleventh U-phase cooling fans UF11 arranged obliquely is not limited to two, and three or more may be provided.

[0261] In this case, more than three cooling fans UF11 for the eleventh U phase are configured as follows: two cooling fans UF11 for the eleventh U phase direct the cooling air diagonally upward, and when viewed from the z direction, the above cooling air intersects at the center of the x direction and at the center of the y direction of the area including the eleventh U phase resistor group UR11.

[0262] However, the fan may be configured so that the rotation axis LX is parallel to the z direction without being tilted.

[0263] Each of the first V-phase resistance unit V1 and the second V-phase resistance unit V2 includes a plurality of resistor groups and a cooling unit that supplies cooling air to the plurality of resistor groups.

[0264] The resistor group of the first V-phase resistor unit V1 and the resistor group of the second V-phase resistor unit V2 are connected in series. However, the resistor group of the first V-phase resistor unit V1 and the resistor group of the second V-phase resistor unit V2 may be connected in parallel.

[0265] The power from the S-phase terminal of the test object power supply 100 is supplied to the resistor group of the first V-phase resistance unit V1 and the second V-phase resistance unit V2 via the first breaker unit D1 and the first breaker device 15 .

[0266] The cooling units of the first V-phase resistance unit V1 and the second V-phase resistance unit V2 are supplied with electric power from an auxiliary power supply different from the test target power supply 100 .

[0267] However, the power from the test object power supply 100 may be supplied to the cooling units of the first V-phase resistance unit V1 and the second V-phase resistance unit V2 .

[0268] Each of the first W-phase resistance unit W1 and the second W-phase resistance unit W2 includes a plurality of resistor groups and a cooling unit that supplies cooling air to the plurality of resistor groups.

[0269] The resistor group of the first W-phase resistance unit W1 and the resistor group of the second W-phase resistance unit W2 are connected in series. However, the resistor group of the first W-phase resistance unit W1 and the resistor group of the second W-phase resistance unit W2 may be connected in parallel.

[0270] The power from the T-phase terminal of the test object power supply 100 is supplied to the resistor group of the first W-phase resistance unit W1 and the second W-phase resistance unit W2 via the first disconnecting portion D1 and the first disconnecting device 15 .

[0271] The cooling units of the first W-phase resistance unit W1 and the second W-phase resistance unit W2 are supplied with electric power from an auxiliary power supply different from the test target power supply 100 .

[0272] However, the power from the test object power supply 100 may be supplied to the cooling portions of the first W-phase resistance unit W1 and the second W-phase resistance unit W2 .

[0273] The first U-phase resistor unit U1, the first V-phase unit V1, and the first W-phase unit W1 are arranged in the y direction (see Figure 6 ).

[0274] The first U-phase resistor unit U1 and the second U-phase resistor unit U2 are arranged in the x direction, and an insulating member F is provided between them (see Figure 7 ).

[0275] The first V-phase resistance unit V1 and the second V-phase resistance unit V2 are arranged in the x-direction, with an insulating member provided therebetween.

[0276] The first W-phase resistance unit W1 and the second W-phase resistance unit W2 are arranged in the x-direction, with an insulating member provided therebetween.

[0277] The length of the eleventh housing H11 in the y direction is defined as a first length k1, the distance between the holding frame UR11a of the first U-phase resistor group UR11 and the twelfth housing H12 in the y direction is defined as a second length k2, and the distance between the holding frame UR11a of the first U-phase resistor group UR11 and the holding frame of the first V-phase resistor group VR11 in the y direction is defined as a third length k3.

[0278] The distance in the y direction between the retaining frame of the first V-phase resistor group VR11 and the retaining frame of the first W-phase resistor group WR11 is defined as the fourth length k4, the distance in the y direction between the retaining frame of the first W-phase resistor group WR11 and the twelfth shell H12 is defined as the fifth length k5, and the dimensions in the x-direction and y-direction of the retaining frame UR11a of the first U-phase resistor group UR11, the retaining frame of the first V-phase resistor group VR11, and the retaining frame of the first W-phase resistor group WR11 are defined as the tenth length k10.

[0279] In addition, the distance between the retaining frame UR11a of the first U-phase resistor group UR11 and the twelfth shell H12 in the x-direction is defined as the eleventh length k11, the distance between the retaining frame UR11a of the first U-phase resistor group UR11 and the retaining frame of the second U-phase resistor group UR12 in the x-direction is defined as the twelfth length k12, and the distance between the retaining frame of the second U-phase resistor group UR12 and the twelfth shell H12 in the x-direction is defined as the thirteenth length k13.

[0280] In addition, the z-direction dimension of the first U-phase resistance unit U1 (the total value of the height of the first U-phase cooling part UC11, the first mounting metal part F1, the insulating part F, and the retaining frame of the first U-phase resistor group UR11) is defined as the twenty-first length k21, and the z-direction distance between the upper surface of the retaining frame UR11a of the first U-phase resistor group UR11 and the upper surface of the twelfth shell H12 is defined as the twenty-second length k22.

[0281] For example, if the first length k1 is set to 860 mm, the second length k2 is set to 400 mm, the third length k3 is set to 900 mm, the fourth length k4 is set to 400 mm, the fifth length k5 is set to 200 mm, and the tenth length k10 is set to 1050 mm, then the total value of the y-direction dimension of the eleventh shell H11 and the y-direction dimension of the twelfth shell H12 (twentieth length k20) is approximately 6000 mm.

[0282] If the eleventh length k11 is set to 50 mm, the twelfth length k12 is set to 200 mm, the thirteenth length k13 is set to 50 mm, and the tenth length k10 is set to 1050 mm, the x-direction dimension (thirtieth length k30) of the twelfth housing H12 is approximately 2400 mm.

[0283] If the twenty-first length k21 is set to 2000 mm and the twenty-second length k22 is set to 500 mm, the dimension of the twelfth housing H12 in the z direction (the fortieth length k40) is approximately 2500 mm.

[0284] (Effect of changing the spacing between the resistor group holding frames)

[0285] The electrical isolation between each resistor group and the housing can be sufficiently ensured, and a 20-foot container can be used as the eleventh housing H11 and the twelfth housing H12 , that is, the first load test unit B1 can be housed in a 20-foot container.

[0286] Furthermore, the operator can enter a region with a large gap in the y direction, such as between the first U-phase resistance unit U1 and the first V-phase resistance unit V1, to perform maintenance or other work.

[0287] (First Control Device 11)

[0288] The first control device 11 includes a switching device 11 a , and performs on-off control of the power supply from the test object power supply 100 to the six resistance units of the first load test section B1 .

[0289] The switch device 11a of the first control device 11 performs on-off control of the power supply to the six resistance units of the first load test section B1 or the power supply to the plurality of resistor groups provided in the six resistance units of the first load test section B1.

[0290] The first control device 11 is supplied with electric power from an auxiliary power supply that is different from the test object power supply 100 .

[0291] However, the first control device 11 may be supplied with electric power from the test object power supply 100 .

[0292] (First circuit breaker 15)

[0293] The first circuit breaker device 15 includes a VCB, and is connected to the first circuit breaker D1 on the input side and to the first U-phase resistor U1 , the first V-phase resistor V1 , and the first W-phase resistor W1 on the output side.

[0294] The first circuit breaker 15 controls on and off the power supply to at least the resistor units connected to the first circuit breaker 15 (the first U-phase resistor U1 , the first V-phase resistor V1 , and the first W-phase resistor W1 ).

[0295] (Second load test section B2)

[0296] The second load test unit B2 includes 6 resistance units (resistance unit U3 for the third U phase, resistance unit U4 for the fourth U phase, resistance unit V3 for the third V phase, resistance unit V4 for the fourth V phase, resistance unit W3 for the third W phase, resistance unit W4 for the fourth W phase), a control unit (second control device 12) and a circuit breaker device (second circuit breaker device 16).

[0297] Each of the third U-phase resistance unit U3 and the fourth U-phase resistance unit U4 includes a plurality of resistor groups and a cooling unit that supplies cooling air to the plurality of resistor groups.

[0298] The resistor group of the third U-phase resistance unit U3 and the resistor group of the fourth U-phase resistance unit U4 are connected in series. However, the resistor group of the third U-phase resistance unit U3 and the resistor group of the fourth U-phase resistance unit U4 may be connected in parallel.

[0299] The power from the R-phase terminal of the test object power supply 100 is supplied to the resistor group of the third U-phase resistance unit U3 and the fourth U-phase resistance unit U4 via the first breaker unit D1 and the second breaker device 16 .

[0300] The cooling units of the third U-phase resistance unit U3 and the fourth U-phase resistance unit U4 are supplied with electric power from an auxiliary power supply different from the test target power supply 100 .

[0301] However, the power from the test object power supply 100 may be supplied to the cooling portions of the third U-phase resistance unit U3 and the fourth U-phase resistance unit U2 .

[0302] In addition, in the third embodiment described later, the case where the resistor group of the third U-phase resistance unit U3 is the thirteenth U-phase resistor group UR13, the cooling part of the third U-phase resistance unit U3 is the thirteenth U-phase cooling part UC13, and the cooling fan of the thirteenth U-phase cooling part UC13 is the thirteenth U-phase cooling fan UF13 is described.

[0303] Each of the third V-phase resistance unit V3 and the fourth V-phase resistance unit V4 includes a plurality of resistor groups and a cooling unit that supplies cooling air to the plurality of resistor groups.

[0304] The resistor group of the third V-phase resistor unit V3 and the resistor group of the fourth V-phase resistor unit V4 are connected in series, but may be connected in parallel.

[0305] The power from the S-phase terminal of the test object power supply 100 is supplied to the resistor group of the third V-phase resistance unit V3 and the fourth V-phase resistance unit V4 via the first breaker unit D1 and the second breaker device 16 .

[0306] The cooling units of the third V-phase resistance unit V3 and the fourth V-phase resistance unit V4 are supplied with electric power from an auxiliary power supply different from the test target power supply 100 .

[0307] However, the power from the test object power supply 100 may be supplied to the cooling portions of the third V-phase resistance unit V3 and the fourth V-phase resistance unit V2 .

[0308] In addition, in the third embodiment described later, the case where the resistor group of the third V-phase resistance unit V3 is the thirteenth V-phase resistor group VR13, the cooling part of the third V-phase resistance unit V3 is the thirteenth V-phase cooling part VC13, and the cooling fan of the thirteenth V-phase cooling part VC13 is the thirteenth V-phase cooling fan VF13 is described.

[0309] Each of the third W-phase resistance unit W3 and the fourth W-phase resistance unit W4 includes a plurality of resistor groups and a cooling unit that supplies cooling air to the plurality of resistor groups.

[0310] The resistor group of the third W-phase resistance unit W3 and the resistor group of the fourth W-phase resistance unit W4 are connected in series, but may be connected in parallel.

[0311] The power from the T-phase terminal of the test object power supply 100 is supplied to the resistor group of the third W-phase resistance unit W3 and the fourth W-phase resistance unit W4 via the first breaker unit D1 and the second breaker device 16 .

[0312] The cooling units of the third W-phase resistance unit W3 and the fourth W-phase resistance unit W4 are supplied with electric power from an auxiliary power supply different from the test target power supply 100 .

[0313] However, the power from the test object power supply 100 may be supplied to the cooling portions of the third W-phase resistance unit W3 and the fourth W-phase resistance unit W2 .

[0314] In addition, in the third embodiment described later, the case will be described in which the resistor group of the third W-phase resistance unit W3 is the thirteenth W-phase resistor group WR13, the cooling part of the third W-phase resistance unit W3 is the thirteenth W-phase cooling part WC13, and the cooling fan of the thirteenth W-phase cooling part WC13 is the thirteenth W-phase cooling fan WF13.

[0315] The third U-phase resistance unit U3 , the third V-phase resistance unit V3 , and the third W-phase resistance unit W3 are arranged in the y-direction.

[0316] The third U-phase resistance unit U3 and the fourth U-phase resistance unit U4 are arranged in the x-direction, with an insulating member provided therebetween.

[0317] The third V-phase resistance unit V3 and the fourth V-phase resistance unit V4 are arranged in the x-direction, with an insulating member provided therebetween.

[0318] The third W-phase resistance unit W3 and the fourth W-phase resistance unit W4 are arranged in the x-direction, with an insulating member provided therebetween.

[0319] (Second Control Device 12)

[0320] The second control device 12 includes a switching device, and performs on-off control of the power supply from the test object power supply 100 to the six resistance units of the second load test section B2.

[0321] The switch device 12a of the second control device 12 performs on-off control of the power supply to the six resistance units of the second load test part B2, or on-off control of the power supply to the multiple resistor groups respectively provided in the six resistance units of the second load test part B2.

[0322] The second control device 12 is supplied with electric power from an auxiliary power supply that is different from the test object power supply 100 .

[0323] However, the second control device 12 may be supplied with electric power from the test object power supply 100 .

[0324] (Second circuit breaker 16)

[0325] The second circuit breaker 16 includes a VCB, is connected to the first circuit breaker D1 on the input side, and is connected to the third U-phase resistor U3 , the third V-phase resistor V3 , and the third W-phase resistor W3 on the output side.

[0326] The second circuit breaker 16 controls on and off the power supply to at least the resistor units connected to the second circuit breaker 16 (the third U-phase resistor unit U3 , the third V-phase resistor unit V3 , and the third W-phase resistor unit W3 ).

[0327] (Positional Relationship of Each Part)

[0328] The first load testing portion B1 includes an eleventh housing H11 and a twelfth housing H12 .

[0329] The eleventh housing H11 includes a first control device 11 and a first circuit breaker 15 .

[0330] The twelfth housing H12 includes a first U-phase resistor U1 , a second U-phase resistor U2 , a first V-phase resistor V1 , a second V-phase resistor V2 , a first W-phase resistor W1 , and a second W-phase resistor W2 .

[0331] However, the twelfth housing H12 may also include the switch device 11 a of the first control device 11 .

[0332] The surface of the twelfth housing H12 facing the twenty-second housing H22 and the surface of the twenty-second housing H22 facing the twelfth housing H12 may be opened.

[0333] The second load testing portion B2 includes a twenty-first housing H21 and a twenty-second housing H22 .

[0334] The twenty-first housing H21 includes a second control device 12 and a second circuit breaker device 16 .

[0335] The twenty-second housing H22 includes a third U-phase resistor U3, a fourth U-phase resistor U4, a third V-phase resistor V3, a fourth V-phase resistor V4, a third W-phase resistor W3, and a fourth W-phase resistor W4.

[0336] However, the twenty-second housing H22 may also include the switch device 12a of the second control device 12.

[0337] The area including the first circuit breaker 15 (the eleventh housing H11) and the area including the resistance units of the second load test part B2 (the twenty-second housing H22) are arranged in a positional relationship with the area including the six resistance units of the first load test part B1 (the twelfth housing H12) sandwiched therebetween.

[0338] The area including the resistance unit of the first load test part B1 (the twelfth shell H12) and the area including the second circuit breaker device 16 (the twenty-first shell H21) are arranged in a positional relationship with the area including the 6 resistance units of the second load test part B2 (the twenty-second shell H22) separated by each other.

[0339] In addition, the eleventh housing H11 may include a second control device 12 and a second disconnecting device 16 .

[0340] In this case, the area including the first circuit breaker device 15 and the second circuit breaker device 16 (the eleventh shell H11) and the area including the resistance unit of the second load test part B2 (the twenty-second shell H22) are arranged in a positional relationship with the area (the twelfth shell H12) including the six resistance units of the first load test part B1.

[0341] (Battery storage unit BT)

[0342] Preferably, when the eleventh U-phase cooling fan UF11 of the eleventh U-phase cooling unit UC11 is driven by power from the test object power supply 100 without providing this separate auxiliary power supply, the power storage unit BT is provided in the first load test device A1.

[0343] The power storage unit BT stores electric power from the test power supply 100 , and drives the cooling fan (such as the eleventh U-phase cooling fan UF11 ) of the first load test device A1 when the power supply from the test power supply 100 is cut off.

[0344] In the first embodiment, an example is shown in which the power storage unit BT is provided in the first breaking device 15 and the second breaking device 16 .

[0345] Each component of the load test device can be driven using the power from the power supply under test 100 without providing an auxiliary power supply separate from the power supply under test 100 .

[0346] In particular, since the power storage unit stores power from the test power supply 100 , the cooling fan and the like can be driven stably even when the power supply from the test power supply 100 is cut off, such as during on / off control of the test power supply 100 during a load test.

[0347] (Third load test part B3, etc.)

[0348] The structures of the third load test part B3, the fifth load test part B5, the seventh load test part B7, the ninth load test part B9, the eleventh load test part B11, the thirteenth load test part B13, the fifteenth load test part B15, the seventeenth load test part B17, the nineteenth load test part B19, the twenty-first load test part B21, and the twenty-third load test part B23 are the same as those of the first load test part B1.

[0349] However, the first disconnecting devices of the seventh load test section B7 , the ninth load test section B9 , and the eleventh load test section B11 are connected to the second disconnecting device D2 .

[0350] In addition, the first disconnecting devices of the thirteenth load test section B13, the fifteenth load test section B15, and the seventeenth load test section B17 are connected to the third disconnecting section D3.

[0351] In addition, the first breaking devices of the nineteenth load test section B19 , the twenty-first load test section B21 , and the twenty-third load test section B23 are connected to the fourth breaking section D4 .

[0352] (Fourth load test section B4, etc.)

[0353] The structures of the fourth load test section B4, the sixth load test section B6, the eighth load test section B8, the tenth load test section B10, the twelfth load test section B12, the fourteenth load test section B14, the sixteenth load test section B16, the eighteenth load test section B18, the twentieth load test section B20, the twenty-second load test section B22, and the twenty-fourth load test section B24 are the same as the structure of the second load test section B2.

[0354] However, the second breaking devices of the eighth load test section B8 , the tenth load test section B10 , and the twelfth load test section B12 are connected to the second breaking section D2 .

[0355] In addition, the second breaking devices of the fourteenth load test section B14 , the sixteenth load test section B16 , and the eighteenth load test section B18 are connected to the third breaking section D3 .

[0356] In addition, the second breaking devices of the 20th load test section B20, the 22nd load test section B22, and the 24th load test section B24 are connected to the fourth breaking section D4.

[0357] The load testing system 1 of the first embodiment includes: a first load testing device A1 having a first load testing section B1 and a second load testing section B2. The first load testing section B1 includes a first U-phase resistor unit U1, a second U-phase resistor unit U2, a first V-phase resistor unit V1, a second V-phase resistor unit V2, a first W-phase resistor unit W1, a second W-phase resistor unit W2, and a first circuit breaker 15; the second load testing section B2 includes a third U-phase resistor unit U3, a fourth U-phase resistor unit U4, a third V-phase resistor unit V3, a fourth V-phase resistor unit V4, a third W-phase resistor unit W3, and a fourth W-phase resistor unit W4; and load testing devices equivalent to the first load testing device A1 (second to twelfth load testing devices A2 to A12). In other words, the load testing system 1 of the first embodiment includes multiple load testing devices equivalent to the first load testing device A1.

[0358] Regarding multiple load test devices, power is supplied from the test object power supply 100 to the first U-phase resistance unit U1, the second U-phase resistance unit U2, the first V-phase resistance unit V1, the second V-phase resistance unit V2, the first W-phase resistance unit W1 and the second W-phase resistance unit W2 with the help of a circuit breaker (first circuit breaker D1, etc.) separate from the first load test unit B1 and the first circuit breaker device 15.

[0359] In addition, power is supplied from the test object power supply 100 to the third U-phase resistance unit U3, the fourth U-phase resistance unit U4, the third V-phase resistance unit V3, the fourth V-phase resistance unit V4, the third W-phase resistance unit W3 and the fourth W-phase resistance unit W4 with the help of a circuit breaker (such as the first circuit breaker D1) and the first circuit breaker device 15 or the second circuit breaker device 16.

[0360] (Effect of setting multiple resistance units)

[0361] The resistor group of each resistance unit includes a large-capacity resistor, and thus a load test of the high-voltage power supply under test 100 can be performed safely.

[0362] In particular, there is no need to step down the voltage of the electric power from the power supply under test 100 using a transformer or the like.

[0363] Therefore, compared with a load test involving voltage reduction using a transformer or the like, power can be supplied to each load test unit using a thinner power supply cable.

[0364] Furthermore, compared to a method involving voltage reduction using a transformer or the like, a load test can be performed in a state close to actual use.

[0365] In addition, the first to twenty-fourth load testing sections B1 to B4 can be used for different load tests, or as described above, can be integrated into one load test.

[0366] (Application Example of Wiring, Second Embodiment)

[0367] In the first embodiment, the following example is described: power from the test object power supply 100 is supplied to the first U-phase resistance unit U1, the first V-phase resistance unit V1, and the first W-phase resistance unit W1 by means of the first circuit breaker 15, and power from the test object power supply 100 is supplied to the third U-phase resistance unit U3, the third V-phase resistance unit V3, and the third W-phase resistance unit W3 by means of the second circuit breaker 16.

[0368] However, the power from the test object power supply 100 may be supplied to the first U-phase resistor unit U1, the first V-phase resistor unit V1, the first W-phase resistor unit W1, the third U-phase resistor unit U3, the third V-phase resistor unit V3, and the third W-phase resistor unit W3 via the first circuit breaker 15 (see the second embodiment, Figure 8 and Figure 9 ).

[0369] In this case, the power supply cables from the first circuit breaker 15 to the third U-phase resistor unit U3, the third V-phase resistor unit V3 and the third W-phase resistor unit W3 can pass through the inside of the twelfth shell H12 and the twenty-second shell H22, which can reduce the number of cables visible from the outside.

[0370] In the second embodiment, the second disconnecting device 16 may be omitted.

[0371] (Application Example of Wiring, Third Embodiment)

[0372] In the second embodiment, the following example is described: the first control device 11 performs on-off control of the power supply from the test object power supply 100 to the 6 resistance units of the first load test part B1, and the second control device 12 performs on-off control of the power supply from the test object power supply 100 to the 6 resistance units of the second load test part B2.

[0373] However, the first control device 11 may also control the on / off of the power supply from the test object power supply 100 to the six resistance units of the first load test section B1 and the power supply from the test object power supply 100 to the six resistance units of the second load test section B2 (see the third embodiment, Figures 10 to 12 ).

[0374] In this case, the control signal cables from the control part C1 to the third U-phase resistance unit U3, the fourth U-phase resistance unit U4, the third V-phase resistance unit V3, the fourth V-phase resistance unit V4, the third W-phase resistance unit W3 and the fourth W-phase resistance unit W4 can pass through the inside of the twelfth shell H12 and the twenty-second shell H22, thereby reducing the number of cables visible from the outside.

[0375] In the third embodiment, the second control device 12 may be omitted.

[0376] In addition, the twenty-first housing H21 may be omitted.

[0377] The length of the eleventh shell H11 in the y direction is defined as the first length k1, the distance between the retaining frame UR11a of the first resistor group UR11 and the twelfth shell H12 in the y direction is defined as the second length k2, the distance between the retaining frame UR11a of the first U-phase resistor group UR11 and the retaining frame of the first V-phase resistor group VR11 in the y direction is defined as the third length k3, the distance between the retaining frame of the first V-phase resistor group VR11 and the retaining frame of the first W-phase resistor group WR11 in the y direction is defined as the fourth length k4, the distance between the retaining frame of the first W-phase resistor group WR11 and the retaining frame of the third U-phase resistor group UR13 in the y direction is defined as the fifth length k5, the distance between the retaining frame of the third U-phase resistor group UR13 and the retaining frame of the third V-phase resistor group VR11 in the y direction is defined as the fifth length k6. The distance in the y direction of the retaining frame of the resistor group VR13 is defined as the sixth length k6, the distance in the y direction of the retaining frame of the third V-phase resistor group VR13 and the retaining frame of the third W-phase resistor group WR13 is defined as the seventh length k7, the distance in the y direction of the retaining frame of the third W-phase resistor group WR13 and the twenty-second shell H22 is defined as the eighth length k8, and the dimensions in the x-direction and y-direction of the retaining frame UR11a of the first U-phase resistor group UR11, the retaining frame of the first V-phase resistor group VR11, the retaining frame of the first W-phase resistor group WR11, the retaining frame of the third U-phase resistor group UR13, the retaining frame of the third V-phase resistor group VR13 and the retaining frame of the third W-phase resistor group WR13 are defined as the tenth length k10.

[0378] For example, if the first length k1 is set to 860 mm, the second length k2 is set to 400 mm, the third length k3 is set to 900 mm, the fourth length k4 is set to 400 mm, the fifth length k5 is set to 900 mm, the sixth length k6 is set to 900 mm, the seventh length k7 is set to 900 mm, the eighth length k8 is set to 300 mm, and the tenth length k10 is set to 1050 mm, then the total value of the y-direction dimension of the eleventh shell H11, the y-direction dimension of the twelfth shell H12, and the y-direction dimension of the twenty-second shell H22 (the fiftieth length k50) is approximately 12000 mm.

[0379] That is, in this example, the area including the first U-phase resistor unit U1, the second U-phase resistor unit U2, the first V-phase resistor unit V1, the second V-phase resistor unit V2, the first W-phase resistor unit W1, and the second W-phase resistor unit W2 is arranged between the area including the first circuit breaker 15 and the area including the third U-phase resistor unit U3, the fourth U-phase resistor unit U4, the third V-phase resistor unit V3, the fourth V-phase resistor unit V4, the third W-phase resistor unit W3, and the fourth W-phase resistor unit W4, and the y-direction interval (third length k3) between the first U-phase resistor unit U1 and the first V-phase resistor unit V1 and the y-direction interval (fifth length k5) between the first W-phase resistor unit W1 and the third U-phase resistor unit U3 are greater than the y-direction interval (fourth length k4) between the first V-phase resistor unit V1 and the first W-phase resistor unit W1.

[0380] In this case, electrical isolation between each resistor group and the housing can be sufficiently ensured, and a 40-foot container can be used as the eleventh housing H11 , the twelfth housing H12 , and the twenty-second housing H22 . That is, the first load test device A1 can be housed in the 40-foot container.

[0381] Furthermore, the operator can enter a region where the distance in the y direction is large, such as between the first U-phase resistance unit U1 and the first V-phase resistance unit V1, to perform maintenance or other work.

[0382] (Application Example of Arrangement of Resistor Cells, Fourth Embodiment)

[0383] In the first to third embodiments, examples in which two resistance units are arranged in the x-direction have been described.

[0384] However, the number of the resistor unit arranged in the x direction may be only one (see the fourth embodiment, Figures 13 to 15 ).

[0385] The first load tester B1 of the fourth embodiment includes a first U-phase resistor U1 , a second U-phase resistor U2 , a first V-phase resistor V1 , a second V-phase resistor V2 , a first W-phase resistor W1 , and a second W-phase resistor W2 .

[0386] The second load test section B2 of the fourth embodiment includes a third U-phase resistance unit U3 , a third V-phase resistance unit V3 , and a third W-phase resistance unit W3 .

[0387] Regarding the first load test device A1 of the fourth embodiment, the first U-phase resistance unit U1, the first V-phase resistance unit V1, the first W-phase resistance unit W1, the second U-phase resistance unit U2, the second V-phase resistance unit V2, the second W-phase resistance unit W2, the third U-phase resistance unit U3, the third V-phase resistance unit V3, and the third W-phase resistance unit W3 are arranged in the y direction.

[0388] The resistors R of the resistor group of each resistor unit in the fourth embodiment extend in the x-direction.

[0389] Preferably, the surface of the holding frame of the resistor group of each resistor unit perpendicular to the x direction, that is, the surface holding the terminals of the resistor R, is detachable from the holding frame and covered with a transparent cover UR11c made of polycarbonate or the like.

[0390] Figure 15 A transparent cover UR11c provided on the yz surface of the holding frame UR11a of the first U-phase resistor group UR11 of the first U-phase resistor unit U1 and holding the terminals of the resistors R is indicated by a bold line.

[0391] (The effect of setting a detachable transparent cover UR11c)

[0392] Adhesion of dust and the like to the end portion of the terminal of the resistor R can be suppressed.

[0393] Furthermore, even if dust or the like adheres, it can be easily visually confirmed from the outside and the dust can be easily removed.

[0394] The resistor R extending in the x-direction of the fourth embodiment is longer than the resistor R extending in the y-direction of the first to third embodiments.

[0395] The cooling portion of each resistor unit is provided with two cooling fans in the x-direction.

[0396] For example, two eleventh U-phase cooling fans UF11a and UF11b are arranged side by side in the x direction in the eleventh U-phase cooling unit UC11 of the fourth embodiment.

[0397] That is, when viewed from the z direction, the length of the resistor R extending along the x direction is approximately the same as the length of the two cooling fans arranged, and when viewed from the z direction, the length of the resistor group arranged in the y direction (column width) is approximately the same as the length of one cooling fan arrangement (the width of the cooling fan in the y direction).

[0398] The width of the container in the short side direction can be effectively utilized by using the resistor R having a length approximately twice that of a normal resistor R, and a large-capacity resistor unit can be formed.

[0399] Preferably, a first guide wall UC11a including a slope for guiding the cooling air from the eleventh U-phase cooling fan UF11a toward the vicinity of the rotation axis LX of the eleventh U-phase cooling fan UF11a is provided above the eleventh U-phase cooling fan UF11a in the z direction of the eleventh U-phase cooling unit UC11 and on the opposite side of the eleventh U-phase cooling fan UF11b.

[0400] Preferably, a second guide wall UC11b including a slope for guiding the cooling air from the eleventh U-phase cooling fan UF11b toward the vicinity of the rotation axis LX of the eleventh U-phase cooling fan UF11b is provided above the eleventh U-phase cooling fan UF11b in the z direction of the eleventh U-phase cooling unit UC11 and on the opposite side of the eleventh U-phase cooling fan UF11a.

[0401] (Set the effect of the guide wall)

[0402] The direction in which the cooling air flows can be easily controlled, and the cooling air can be supplied to a wide area where the resistor group including the long resistors R exists.

[0403] The length of the eleventh shell H11 in the y direction is defined as the first length k1, the distance in the y direction between the retaining frame UR11a of the first U-phase resistor group UR11 and the twelfth shell H12 is defined as the second length k2, the distance in the y direction between the retaining frame of a resistor group adjacent in the y direction and the retaining frame of another resistor group is defined as the third length k3, the distance in the y direction between the retaining frame of the third W-phase resistor group WR13 and the twenty-second shell H22 is defined as the second length k2, the dimension of the retaining frame of each resistor group in the y direction is defined as the tenth length k10, and the dimension of the retaining frame of each resistor group in the x direction is defined as the fifteenth length k15.

[0404] Furthermore, the distance in the x direction between the holding frame UR11 a of the first U-phase resistor group UR11 and the twelfth housing H12 is defined as an eleventh length k11 .

[0405] For example, if the first length k1 is set to 1117 mm, the second length k2 is set to 150 mm, the third length k3 is set to 150 mm, and the tenth length k10 is set to 1050 mm, then the total value of the y-direction dimension of the eleventh shell H11, the y-direction dimension of the twelfth shell H12, and the y-direction dimension of the twenty-second shell H22 (the fiftieth length k50) is approximately 12000 mm.

[0406] If the eleventh length k11 is set to 350 mm and the fifteenth length k15 is set to 1700 mm, the dimension of the twelfth housing H12 in the x direction (the thirtieth length k30) is approximately 2400 mm.

[0407] In this case, it is possible to sufficiently ensure electrical isolation between each resistor group and the housing and use a 40-foot container as the eleventh housing H11 , the twelfth housing H12 , and the twenty-second housing H22 .

[0408] Furthermore, since the resistors R extend in the x-direction, there is less need for an operator to enter between adjacent resistor groups, and the widths of adjacent resistor groups in the y-direction can be set smaller.

[0409] (Application example of the number of resistance units)

[0410] In the fourth embodiment, an example has been described in which three U-phase resistance units, three V-phase resistance units, and three W-phase resistance units are provided in one load test device.

[0411] However, the number of resistance units provided in one load test device is not limited thereto.

[0412] For example, the following method can be considered: as the first load test part B1, one resistance unit for U phase, one resistance unit for V phase and one resistance unit for W phase are set, and as the second load test part B2, one resistance unit for U phase, one resistance unit for V phase and one resistance unit for W phase are set.

[0413] In addition, the second load testing part B2 may be omitted.

[0414] Furthermore, an example in which the U-phase resistance unit, the V-phase resistance unit, and the W-phase resistance unit are configured separately has been described.

[0415] That is, the example in which the holding frame for the U-phase resistor group, the holding frame for the V-phase resistor group, and the holding frame for the W-phase resistor group are arranged side by side in the x direction or the y direction has been described.

[0416] However, the U-phase resistance unit, the V-phase resistance unit, and the W-phase resistance unit may be integrally configured.

[0417] Specifically, the resistor group held in one holding frame includes a resistor group serving as a U-phase resistor group, a resistor group serving as a V-phase resistor group, and a resistor group serving as a W-phase resistor group.

[0418] In this case, one cooling unit cools the resistor groups held in the one holding frame, namely, the resistor group serving as the U-phase resistor group, the resistor group serving as the V-phase resistor group, and the resistor group serving as the W-phase resistor group.

[0419] Therefore, a method is also conceivable in which each load test device is provided with only one load test section, and the load test section is composed of one resistance unit (the U-phase resistance unit, the V-phase resistance unit, and the W-phase resistance unit are integrated).

[0420] That is, power is supplied from the test object power supply 100 to at least one of the one or more resistance units with the help of a circuit breaker (first circuit breaker D1, etc.) separate from the load test device (first load test device A1, etc.), a first circuit breaker 15 and a switching device of one or more resistance units (switching device 11a of the first control device 11, etc.).

[0421] For example, in the first load test device A1 , the second load test section B2 is omitted and only the first load test section B1 is provided. This single load test section (first load test section B1 ) is composed of a single resistance unit.

[0422] In this case, the holding frame may be omitted and the twelfth housing H12 may be used as a frame for holding the resistor group.

[0423] Furthermore, the test target power supply 100 is not limited to a three-phase AC power generation device, and may be a single-phase AC power generation device, a DC power generation device, or a battery.

[0424] (Application Example of Wiring, Fifth Embodiment)

[0425] In the third embodiment, the example in which the twelfth housing H12 is arranged between the eleventh housing H11 and the twenty-second housing H22 has been described.

[0426] However, the eleventh housing H11 may be disposed between the twelfth housing H12 and the twenty-second housing H22 (see the fifth embodiment, Figure 16 and Figure 17 ).

[0427] The eleventh housing H11 of the fifth embodiment includes a first control device 11 , a first circuit breaker device 15 , and a second circuit breaker device 16 .

[0428] Similar to the third embodiment, the first control device 11 controls the power supply from the test object power supply 100 to the six resistance units of the first load test section B1 and the power supply from the test object power supply 100 to the six resistance units of the second load test section B2.

[0429] In the fifth embodiment, the second control device 12 is omitted.

[0430] In addition, the twenty-first housing H21 is also omitted.

[0431] However, it can also be formed as follows: the eleventh shell H11 includes a second control device 12, the first control device 11 performs on-off control of the power supply from the test object power supply 100 to the 6 resistance units of the first load test part B1, and the second control device 12 performs on-off control of the power supply from the test object power supply 100 to the 6 resistance units of the second load test part B2.

[0432] Similar to the first embodiment, power from the test object power supply 100 is supplied to the first U-phase resistance unit U1, the first V-phase resistance unit V1, and the first W-phase resistance unit W1 by means of the first circuit breaker 15, and power from the test object power supply 100 is supplied to the third U-phase resistance unit U3, the third V-phase resistance unit V3, and the third W-phase resistance unit W3 by means of the second circuit breaker 16.

[0433] However, as in the third embodiment, power from the test object power supply 100 may be supplied to the first U-phase resistance unit U1, the first V-phase resistance unit V1, the first W-phase resistance unit W1, the third U-phase resistance unit U3, the third V-phase resistance unit V3, and the third W-phase resistance unit W3 with the help of the first circuit breaker 15.

[0434] In this case, the second disconnecting device 16 can be omitted.

[0435] The length of the eleventh housing H11 in the y direction is defined as a first length k1, the distance between the retaining frame UR11a of the first U-phase resistor group UR11 and the twelfth housing H12 in the y direction is defined as a second length k2, the distance between the retaining frame UR11a of the first U-phase resistor group UR11 and the retaining frame of the first V-phase resistor group VR11 in the y direction is defined as a third length k3, the distance between the retaining frame of the first V-phase resistor group VR11 and the retaining frame of the first W-phase resistor group WR11 in the y direction is defined as a fourth length k4, the distance between the retaining frame of the first W-phase resistor group WR11 and the twelfth housing H12 in the y direction and the distance between the retaining frame of the third U-phase resistor group UR13 and the twenty-second housing 22 in the y direction are defined as a fifth length k5, and the distance between the retaining frame of the third U-phase resistor group UR13 and the twenty-second housing 22 in the y direction are defined as a fifth length k6. The distance in the y direction between the retaining frame of UR13 and the retaining frame of the third V-phase resistor group VR13 is defined as the sixth length k6, the distance in the y direction between the retaining frame of the third V-phase resistor group VR13 and the retaining frame of the third W-phase resistor group WR13 is defined as the seventh length k7, the distance in the y direction between the retaining frame of the third W-phase resistor group WR13 and the twenty-second shell H22 is defined as the eighth length k8, and the dimensions in the x-direction and y-direction of the retaining frame UR11a of the first U-phase resistor group UR11, the retaining frame of the first V-phase resistor group VR11, the retaining frame of the first W-phase resistor group WR11, the retaining frame of the third U-phase resistor group UR13, the retaining frame of the third V-phase resistor group VR13 and the retaining frame of the third W-phase resistor group WR13 are defined as the tenth length k10.

[0436] For example, if the first length k1 is set to 1600mm, the second length k2 is set to 275mm, the third length k3 is set to 820mm, the fourth length k4 is set to 820mm, the fifth length k5 is set to 225mm, the sixth length k6 is set to 820mm, the seventh length k7 is set to 820mm, the eighth length k8 is set to 275mm, and the tenth length k10 is set to 1050mm, then the total value of the y-direction dimension of the eleventh shell H11, the y-direction dimension of the twelfth shell H12, and the y-direction dimension of the twenty-second shell H22 (the fiftieth length k50) is approximately 12000mm.

[0437] In this case, it is possible to sufficiently ensure electrical isolation between each resistor group and the housing and use a 40-foot container as the eleventh housing H11 , the twelfth housing H12 , and the twenty-second housing H22 .

[0438] In addition, an operator can enter between adjacent resistor groups to perform maintenance and other operations.

[0439] In particular, it is preferable that the intervals between adjacent holding frames (third length k3, fourth length k4, sixth length k6, seventh length k7) be set to approximately 80% of the length of the holding frame (tenth length k10).

[0440] In this case, the interval between adjacent holding frames is approximately 80% of the length of the resistor R in the longitudinal direction, which is substantially the same as the length of the holding frame.

[0441] (The effect of setting the interval between the holding frames to about 80% of the length of the holding frames)

[0442] It is possible to fully ensure electrical isolation and use containers of a specified size as the eleventh shell H11, the twelfth shell H12 and the twenty-second shell H22, that is, the first load test device A1 can be stored in a container of a specified size, and the resistor R extending along the y direction can also be easily removed from between the retaining frames.

[0443] (Effect of placing the eleventh housing H11 in the center)

[0444] The area including the first circuit breaker device 15 (the eleventh shell H11) is arranged in the center of the y direction, and the area including the first U-phase resistance unit U1 and the like (the twelfth shell H12) and the area including the third U-phase resistance unit U3 and the like (the twenty-second shell H22) are arranged on both sides thereof, thereby improving the weight balance in the long side direction of a container.

[0445] (Application Example of Wiring, Sixth Embodiment)

[0446] In the first embodiment, an example has been described in which the load test system 1 includes 12 load test devices (the first load test device A1 to the twelfth load test device A12 ).

[0447] However, the number of load testing devices that the load testing system 1 has is not limited thereto.

[0448] For example, the load test system 1 may include 10 load test devices (a first load test device A1 to a fifth load test device A5, a seventh load test device A7, an eighth load test device A8, and a tenth load test device A10 to a twelfth load test device A12) (see the sixth embodiment, Figure 18 ).

[0449] While several embodiments of the present invention have been described, these embodiments are provided as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. The above-described embodiments and their variations are intended to be within the scope and spirit of the invention, and are also intended to be within the scope of the invention as set forth in the claims.

[0450] Description of Reference Numerals

[0451] 1 Load testing system

[0452] 11. First control device

[0453] 11a Switching device of the first control device

[0454] 12 Second control device

[0455] 12a Switching device of the second control device

[0456] 15 First circuit breaker

[0457] 16 Second circuit breaker

[0458] 100 Test object power supply

[0459] A1~A12 The first load test device to the twelfth load test device

[0460] B1~B24 Load test section 1~24 Load test section

[0461] BT Power Storage Division

[0462] C1 Control Unit

[0463] D1~D4 First breaker unit~Fourth breaker unit

[0464] F Insulation

[0465] F1 First installation metal parts

[0466] F2 Second mounting metal part

[0467] F3 Third mounting metal part

[0468] H11 Eleventh Shell

[0469] H12 12th shell

[0470] H21 twenty-first shell

[0471] H22 Shell 22

[0472] IB1 First Insulation Board

[0473] IB2 Second insulation board

[0474] k1~k8 The first to eighth lengths

[0475] k10 tenth length,

[0476] k11~k13 eleventh to thirteenth lengths

[0477] k15 fifteenth length

[0478] k20 twentieth length

[0479] k21, k22 21st length, 22nd length

[0480] k30 30th length

[0481] k40 fortieth length

[0482] k50 fiftieth length

[0483] LX Rotating shaft of the cooling fan for the eleventh U phase

[0484] NA Resistor not configured area

[0485] R resistor

[0486] U1 first U phase resistor unit

[0487] U2 Second U-phase resistor unit

[0488] U3 Third U-phase resistor unit

[0489] U4 Fourth U-phase resistor unit

[0490] UC11 Eleventh U-phase cooling unit (cooling unit for the first U-phase resistor unit)

[0491] UC11a First guide wall

[0492] UC11b Second guide wall

[0493] UF11 11th U-phase cooling fan (Cooling fan for the 11th U-phase cooling unit)

[0494] UF11a, UF11b 2 11th U phase cooling fans

[0495] UF11c socket

[0496] UR11 11th U-phase resistor group (resistor group of the first U-phase resistor unit)

[0497] UR11a Resistor holder for the 11th phase U

[0498] UR11b Protrusion of the holding frame of the eleventh U-phase resistor group

[0499] UR11c Transparent cover for the retaining frame of the 11th U-phase resistor group

[0500] UC12 12th U-phase cooling unit (cooling unit for the second U-phase resistor unit)

[0501] UF12 12th U-phase cooling fan (cooling fan for the 12th U-phase cooling unit)

[0502] UR12 12th U-phase resistor group (resistor group for the second U-phase resistor unit)

[0503] UC13 Thirteenth U-phase cooling unit (cooling unit for the third U-phase resistor unit)

[0504] UF13 Cooling fan for the 13th U phase (Cooling fan for the 13th U phase cooling unit)

[0505] UR13 Thirteenth U-phase resistor group (resistor group of the third U-phase resistor unit)

[0506] V1 1st V phase resistor unit

[0507] V2 Second V-phase resistor unit

[0508] V3 Third V phase resistor unit

[0509] V4 Fourth V phase resistor unit

[0510] VC11 Eleventh V-phase cooling unit (cooling unit for the first V-phase resistor unit)

[0511] VF11 11th V-phase cooling fan (cooling fan for the 11th V-phase cooling unit)

[0512] VR11: Eleventh V-phase resistor group (resistor group of the first V-phase resistor unit)

[0513] VC13 Thirteenth V-phase cooling unit (cooling unit for the third V-phase resistor unit)

[0514] VF13 13th V phase cooling fan (cooling fan for the 13th V phase cooling unit)

[0515] VR13 Thirteenth V-phase resistor group (resistor group of the third V-phase resistor unit)

[0516] W1 1st W phase resistor unit

[0517] W2 Second W phase resistor unit

[0518] W3 Third W phase resistor unit

[0519] W4 Fourth W phase resistor unit

[0520] WC11 11th W-phase cooling unit (cooling unit for the first W-phase resistor unit)

[0521] WF11 11th V-phase cooling fan (11th W-phase cooling unit cooling fan)

[0522] WR11 11th W-phase resistor group (resistor group of the first W-phase resistor unit)

[0523] WC13 Thirteenth W-phase cooling unit (cooling unit for the third W-phase resistor unit)

[0524] WF13 Cooling fan for the 13th W phase (Cooling fan for the 13th W phase cooling unit)

[0525] WR13 13th W-phase resistor group (resistor group of the third W-phase resistor unit)

Claims

1. A load testing system, wherein: The load testing system includes a plurality of load testing devices, each of which includes a first load testing unit including one or more resistance units and a first disconnecting device. Power is supplied from a test object power source to at least one of the one or more resistance units via at least a disconnecting portion separate from the load test device and the first disconnecting device. The disconnecting unit controls the on / off supply of power to at least one of the plurality of load test devices. The first circuit breaker device performs on / off control of power supply to at least the resistance unit connected to the first circuit breaker device among the one or more resistance units.

2. The load testing system according to claim 1, wherein: The one or more resistance units include a first U-phase resistance unit, a second U-phase resistance unit, a third U-phase resistance unit, a first V-phase resistance unit, a second V-phase resistance unit, a third V-phase resistance unit, a first W-phase resistance unit, a second W-phase resistance unit, and a third W-phase resistance unit. The load test device includes: the first load test section including the first U-phase resistance unit, the second U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the first W-phase resistance unit, the second W-phase resistance unit, and the first circuit breaker; and a second load testing unit including the third U-phase resistance unit, the third V-phase resistance unit, and the third W-phase resistance unit, Power is supplied from the test object power supply to the first U-phase resistor unit, the second U-phase resistor unit, the first V-phase resistor unit, the second V-phase resistor unit, the first W-phase resistor unit, and the second W-phase resistor unit by at least the circuit breaker unit and the first circuit breaker device. Power is supplied from the test object power supply to the third U-phase resistance unit, the third V-phase resistance unit, and the third W-phase resistance unit via at least the disconnecting portion and the first disconnecting device or the second disconnecting device provided in the second load test unit.

3. The load testing system according to claim 2, wherein: The resistors of the resistor group of each of the one or more resistor units extend along the x-direction. The first U-phase resistor unit, the second U-phase resistor unit, the third U-phase resistor unit, the first V-phase resistor unit, the second V-phase resistor unit, the third V-phase resistor unit, the first W-phase resistor unit, the second W-phase resistor unit, and the third W-phase resistor unit are arranged in a y-direction perpendicular to the x-direction. A surface of a holding frame that holds the resistor group of each of the one or more resistor units, which surface holds the terminals of the resistors, is covered with a detachable transparent cover.

4. The load testing system according to claim 2, wherein: The resistors of the resistor group of each of the one or more resistor units extend along the x-direction. The first U-phase resistor unit, the second U-phase resistor unit, the third U-phase resistor unit, the first V-phase resistor unit, the second V-phase resistor unit, the third V-phase resistor unit, the first W-phase resistor unit, the second W-phase resistor unit, and the third W-phase resistor unit are arranged in a y-direction perpendicular to the x-direction. At least the first U-phase resistance unit includes a cooling portion for cooling the resistor group of the first U-phase resistance unit. The cooling unit of the first U-phase resistance unit includes two cooling fans arranged in the x-direction. The cooling portion of the first U-phase resistor unit is provided with a guide wall having an inclined surface. The guide wall guides the cooling air from one of the cooling fans toward the vicinity of the rotation axis of the one cooling fan, and guides the cooling air from the other cooling fan toward the vicinity of the rotation axis of the other cooling fan.

5. The load testing system according to claim 2, wherein: The one or more resistance units include the first U-phase resistance unit, the second U-phase resistance unit, the third U-phase resistance unit, the fourth U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the third V-phase resistance unit, the fourth V-phase resistance unit, the first W-phase resistance unit, the second W-phase resistance unit, the third W-phase resistance unit, and the fourth W-phase resistance unit. The first U-phase resistance unit and the second U-phase resistance unit are arranged in the x direction. The first V-phase resistance unit and the second V-phase resistance unit are arranged in the x direction, The first W-phase resistance unit and the second W-phase resistance unit are arranged in the x-direction, The third U-phase resistance unit and the fourth U-phase resistance unit are arranged in the x direction, The third V-phase resistance unit and the fourth V-phase resistance unit are arranged in the x direction, The third W-phase resistance unit and the fourth W-phase resistance unit are arranged in the x-direction, The first U-phase resistor unit, the first V-phase resistor unit, the first W-phase resistor unit, the third U-phase resistor unit, the third V-phase resistor unit, and the third W-phase resistor unit are arranged in a y-direction perpendicular to the x-direction. The second U-phase resistor unit, the second V-phase resistor unit, the second W-phase resistor unit, the fourth U-phase resistor unit, the fourth V-phase resistor unit, and the fourth W-phase resistor unit are arranged in the y direction. The region including the first U-phase resistor unit, the second U-phase resistor unit, the first V-phase resistor unit, the second V-phase resistor unit, the first W-phase resistor unit, and the second W-phase resistor unit is arranged between the region including the first circuit breaker device and the region including the third U-phase resistor unit, the fourth U-phase resistor unit, the third V-phase resistor unit, the fourth V-phase resistor unit, the third W-phase resistor unit, and the fourth W-phase resistor unit. The y-direction interval between the first U-phase resistor unit and the first V-phase resistor unit, and the y-direction interval between the first W-phase resistor unit and the third U-phase resistor unit are larger than the y-direction interval between the first V-phase resistor unit and the first W-phase resistor unit. The load testing system according to claim 2 , wherein: The one or more resistance units include the first U-phase resistance unit, the second U-phase resistance unit, the third U-phase resistance unit, the fourth U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the third V-phase resistance unit, the fourth V-phase resistance unit, the first W-phase resistance unit, the second W-phase resistance unit, the third W-phase resistance unit, and the fourth W-phase resistance unit. The first U-phase resistance unit and the second U-phase resistance unit are arranged in the x direction. The first V-phase resistance unit and the second V-phase resistance unit are arranged in the x direction, The first W-phase resistance unit and the second W-phase resistance unit are arranged in the x-direction, The third U-phase resistance unit and the fourth U-phase resistance unit are arranged in the x direction, The third V-phase resistance unit and the fourth V-phase resistance unit are arranged in the x direction, The third W-phase resistance unit and the fourth W-phase resistance unit are arranged in the x-direction, The first U-phase resistor unit, the first V-phase resistor unit, the first W-phase resistor unit, the third U-phase resistor unit, the third V-phase resistor unit, and the third W-phase resistor unit are arranged in a y-direction perpendicular to the x-direction. The second U-phase resistor unit, the second V-phase resistor unit, the second W-phase resistor unit, the fourth U-phase resistor unit, the fourth V-phase resistor unit, and the fourth W-phase resistor unit are arranged in the y direction. The resistors of the resistor groups of the first U-phase resistor unit, the second U-phase resistor unit, the third U-phase resistor unit, the fourth U-phase resistor unit, the first V-phase resistor unit, the second V-phase resistor unit, the third V-phase resistor unit, the fourth V-phase resistor unit, the first W-phase resistor unit, the second W-phase resistor unit, the third W-phase resistor unit, and the fourth W-phase resistor unit extend along the y direction. The spacing between the retaining frame of the resistor group holding the first U-phase resistor unit and the retaining frame of the resistor group holding the first V-phase resistor unit, the spacing between the retaining frame of the first V-phase resistor unit and the retaining frame of the resistor group holding the first W-phase resistor unit, the spacing between the retaining frame of the resistor group holding the third U-phase resistor unit and the retaining frame of the third V-phase resistor unit, and the spacing between the retaining frame of the third V-phase resistor group and the retaining frame of the resistor group holding the third W-phase resistor unit are 80% of the width of the retaining frame of the first U-phase resistor unit in the y direction.

7. The load testing system according to claim 5 or 6, wherein: The area including the first circuit breaker device is arranged between: the area including the first U-phase resistance unit, the second U-phase resistance unit, the first V-phase resistance unit, the second V-phase resistance unit, the first W-phase resistance unit and the second W-phase resistance unit, and the area including the third U-phase resistance unit, the fourth U-phase resistance unit, the third V-phase resistance unit, the fourth V-phase resistance unit, the third W-phase resistance unit and the fourth W-phase resistance unit.

8. The load testing system according to claim 1, wherein: Each of the one or more resistor units includes: a resistor group; a holding frame that holds the resistor group; and a cooling unit that cools the resistor group. The resistor group includes a plurality of resistors, The plurality of resistors are arranged at least in a first direction perpendicular to the direction in which the cooling portion and the holding frame are arranged. In a region including a line extending from a rotation axis of a cooling fan of the cooling unit and the center in the first direction of the region where the plurality of resistors are arranged, the resistors are arranged at larger intervals than in other regions of the region where the plurality of resistors are arranged.

9. The load testing system according to claim 1, wherein: Each of the one or more resistor units includes a holding frame for holding the resistor group. A protrusion for diffusing cooling air is formed on the inner wall of the holding frame.

10. The load testing system according to claim 1, wherein: Each of the one or more resistor units includes: a holding frame that holds the resistor group; and a cooling unit that cools the resistor group. The cooling unit includes a plurality of cooling fans, The plurality of cooling fans are arranged in a state of being inclined with respect to a plane perpendicular to a direction in which the cooling unit and the holding frame are arranged so that cooling air strikes a region including the resistor group.

11. The load testing system according to claim 1, wherein: The load test system further includes a control unit that is wiredly connected to each of the plurality of load test devices and transmits a control signal to each of the plurality of load test devices.

12. The load testing system according to claim 1, wherein: Each of the one or more resistor units includes a cooling portion for cooling the resistor group. The cooling unit includes a cooling fan driven by power from the test object power supply, and the first circuit breaker is provided with a power storage unit for storing power from the test object power supply. The power storage unit drives the cooling fan when the power supply from the test object power supply is cut off.

13. The load testing system according to claim 1, wherein: The multiple sets of load testing devices at least include a first load testing device, a second load testing device, a third load testing device, a fourth load testing device, and a fifth load testing device. The circuit breaker includes at least a first circuit breaker and a second circuit breaker. Power is supplied from the test object power supply to the first load test device, the second load test device, and the third load test device via at least the first disconnecting unit. Power is supplied from the test object power supply to the fourth load test device and the fifth load test device via at least the second disconnecting unit.

14. The load testing system according to claim 1, wherein: The one or more resistor units each include: a resistor group; a holding frame that holds the resistor group; a cooling unit that cools the resistor group; and an insulating member disposed between the holding frame and the cooling unit. The insulating member and the cooling unit are mounted using a first mounting metal member. The insulating member and the holding frame are mounted using a second mounting member that is different from the first mounting member.

15. The load testing system according to claim 14, wherein: Each of the one or more resistance units includes a shield, and the shield includes a first insulating plate and a second insulating plate. The first insulating plate is mounted on the cooling portion by a third mounting metal member different from the first mounting metal member and the second mounting metal member. The second insulating plate is mounted on the cooling portion by means of the first mounting metal member. The distal end of the shield is located inside the holding frame.

16. The load testing system according to claim 14, wherein: The cooling part includes a pressure fan type cooling fan, and the cooling fan includes a socket.

17. The load testing system according to claim 1, wherein: supplying power from the test object power supply to at least one of the one or more resistance units by at least the disconnecting portion, the first disconnecting device, and the switching devices of the one or more resistance units; The switching device performs on-off control of power supply to each of the one or more resistance units, or performs on-off control of power supply to each of a plurality of resistor groups provided in each of the one or more resistance units.

18. The load testing system according to claim 1, wherein: The one or more resistance units are composed of one resistance unit, The housings of the plurality of sets of the load test devices each hold the resistor group of the single resistance unit.

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