JP4936932B2 - DC substation for electric railway - Google Patents

Description

  The present invention relates to a DC substation for electric railway that supplies power to a feeding system of a DC railway vehicle.

  A DC substation for electric railway is composed of power receiving equipment, rectifier equipment, power feeding equipment, on-site power equipment, DC power supply equipment, protection / monitoring / control equipment, remote monitoring control transmission equipment, and the like. These facilities and equipment are individually designed, manufactured and tested, and the main circuit and control circuit are connected locally via local cables, and after comprehensive testing, they are delivered to the substation operator. This type of substation is called a distributed substation and an example of the layout is shown in FIG. In the case of this form, since each equipment and device are arranged in a distributed manner, each inspection space is required, and a wide installation surface 70 is required in the entire substation. In addition, as shown in FIG. 11B, wiring between each facility is performed by digging a pit (hole) in the ground and passing a power cable or a signal cable through the pit.

As a technique for reducing the area of the substation installation surface, techniques such as the following Patent Documents 1 to 3 are disclosed.
Japanese Unexamined Patent Publication No. 2-262807 Japanese Patent Laid-Open No. 2-262808 Japanese Patent Application Laid-Open No. 2-262809

  The conventional substation was a system that took time and effort after restoration, such as on-site installation, construction, and adjustment tests.

  An object of the present invention is to provide a substation that houses substantially all the functions required for a substation for a DC electric railway, does not require a building, and is compact and has a short on-site installation and construction period. .

  A DC substation according to an embodiment of the present invention is a substation for a DC electric railway including an on-site power supply facility, a power receiving facility, a rectifier facility, a feeding facility, a protection / monitoring / control device, and an information transmission device, Equipment and devices are housed in a plurality of outdoor cubicles arranged in one direction.

  It is possible to provide substations that store the functions required for DC electric railway substations, do not require buildings, and are compact and have a short installation and construction period.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First embodiment]
FIG. 1 shows a schematic layout of a main circuit device, a protective relay, and meters of a DC substation according to the present invention, and a single-line connection diagram thereof, and FIG. 2 shows a panel division configuration, a panel surface layout, a panel layout of the DC substation according to the present invention. It is an outline drawing showing a schematic diagram.

  This substation consists of a power panel (in-house power facility) 1, a power receiving panel (power receiving facility) 2, a rectifier panel (rectifier facility) 3, a positive panel 4 and a negative panel 5 (feeding equipment), a protection / monitoring / control device, A substation for a DC electric railway including an information transmission device, wherein the equipment and devices are housed in a plurality of outdoor cubicles arranged in one direction and have a rectangular shape as a whole.

  The flow of electricity is as follows. Power is received from an electric power company at 3φ-3W-7.2kV, and it is stepped down to a voltage commensurate with the electrical voltage generated by a rectifier transformer, rectified by a rectifier, and distributed via a DC high-speed circuit breaker for feeding. The example of FIGS. 1 and 2 is an example of T feeding. The low-voltage AC and DC control power supplies are provided by converting the voltage from 7.2 kV to a low voltage by an in-house transformer and converting it to AC low-voltage distribution or DC control power supply.

  The panel is composed of a power panel 1, a power receiving panel 2, a rectifier panel 3, a positive panel 4, and a negative panel 5 from the left. The purpose of each board and the storage equipment are as follows.

  FIG. 3 shows a power supply panel 1 of the present invention. The power supply panel 1 houses a load switch 6, an on-site transformer 7, a DC power supply 8, a low-voltage main circuit breaker 9, and a distribution circuit breaker 10 as main circuit articles. ing. As protection / monitoring / control products, as shown in FIGS. 1, 2 (c) and 2 (d), a low voltage voltmeter 11, an ammeter 12, a common element failure indicator 13, a control switch 14, a failure display A lamp (aggregation) 15 or the like is attached. This board generates 3φ-3W-210 · 105V AC and DC110V power. These power supplies are used as power supplies for lighting, meters, switches, etc. of this substation. The DC power supply 8 is provided with a battery 65 in preparation for a power failure (see FIG. 1).

  A door 49 for the DC power supply device 8 is provided on the left side surface of the power supply panel 1 as shown in FIG. 2A so that the DC power supply device 8 with a carriage can be taken in and out. In addition, since the substation for trains is often an unmanned substation, the transmission device 50 is accommodated in this panel so that signals can be exchanged with the command station so that monitoring and control can be performed even from a distance (see FIG. 2 (c)). ).

  As shown in FIG. 1, the power receiving panel 2 stores a power receiving disconnector 15, a VT 16, a power receiving breaker 17, a CT 18, and a rectifier breaker 19 as main circuit supplies. As the protection / monitoring / control article, as shown in FIG. 1, the power receiving overcurrent relay 20, the power receiving undervoltage relay 21, the rectifier equipment protecting overcurrent relay 22, the power receiving system multimeter 23, the rectifier system multimeter 24, FIG. c) As shown in 2 (d), the power receiving system failure indicator 13, the control switch 14, the circuit breaker, the disconnector status indicator lamps 25 (in the panel), 26 (panel surface) and the like are attached. As shown in FIG. 1, electric power from an electric power company is supplied to the substation via an underground cable via a PAS 54 and an MOF 55 installed on a pillar. As shown in the plan view of FIG. 2B, the main circuit supplies of the power receiving panel 2 are electrically connected to the power panel and the rectifier panel by means of in-panel buses 27 and 28. Such a board internal bus penetrates the wall surface between boards, for example, has connected the power panel and the rectifier board. Here, the bus indicates a conductor for transmitting electric power.

  FIG. 4 shows a rectifying device panel 3 according to the present invention, and this rectifying device panel 3 accommodates 6-pulse rectifier transformers 29 and 30 and a 12-pulse rectifier 31 as main circuit articles as shown in FIG. . The 12-pulse rectifier 31 is composed of twelve rectifier elements, but is simply shown as four elements in FIG. As shown in FIGS. 2C and 2D, the rectifier panel 3 is a protection / monitoring / control product, as shown in FIGS. 2C and 2D, a dial thermometer 32 for protecting the rectifier and the rectifier, and a failure indicator lamp (aggregation) 15. Is provided.

  The rectifier transformers 29 and 30 step down the 7.2 kV AC power received from the power company to the feed voltage (600 V, 750 V, 1500 V) to be used, and the rectifier 31 performs 12-pulse rectification. The example of FIG. 4 is an example in which the rectifier transformers 29 and 30 are housed on the front side and the rectifier 31 is housed on the back side in a comparatively small capacity example. In some cases, a rectifier panel and a rectifier panel are separated.

  The amount of heat generated during normal operation of the rectifier transformers 29 and 30 and the rectifier 31 is relatively large. The rectifying device panel 3 is a panel that generates the largest amount of heat in the substation equipment. Conventionally, a space is provided between the rectifier panel and another panel to prevent the heat of the transformer and the rectifier from adversely affecting the other panel. As shown in FIGS. 2 (a) and 2 (d), a ventilation port 52 is provided on the roof of the rectifier panel 3 of the present application, and an air suction port 66 is provided on the door. When the rectifier transformers 29 and 30 and the rectifier 31 generate heat, a temperature difference from the outside air occurs, and the internal air naturally convects. That is, the heated air is discharged from the ventilation port 52 to the outside, and outside air flows from the suction port 66. In this way, the inside of the rectifier panel 3 is cooled without using a cooling fan or the like. Therefore, the rectifying device panel 3 can be disposed close to the power receiving panel 2 and the positive electrode panel 4 (without providing a space).

  As shown in FIG. 2B, the rectifying device panel 3 is electrically connected to the positive electrode board 4 and the negative electrode board 5 via the internal bus bars 33 and 34.

  As shown in FIG. 1, the positive electrode board 4 stores a DC high speed circuit breaker 35, ΔICT 36, feeder disconnector 37, arrester disconnector 38, and arrester 39 as main circuit supplies. As a monitoring article, a DC high-speed circuit breaker and a status indicator 26 (panel surface) of the feeder disconnector are provided (see FIG. 2D). As shown in FIG. 1, this board is electrically connected to a train line via an external cable 40.

  As shown in FIG. 1, the negative electrode panel 5 houses a negative circuit disconnector 41, a DCPT 42, and a DCPT fuse disconnector 43 as shown in FIG. 1. As a protection / monitoring / control product, FIG. The failure selection device 44, the failure selection device power supply 45, the ground fault overvoltage relay 46 (see FIG. 1), the feeding ammeter 12, the voltmeter 11, the holding ammeter 47, and the feeder failure indicator 13 Control switch 14, circuit breaker, disconnector status display lamp 25 (inside the panel), 26 (panel surface: see FIG. 2 (d)) and the like are attached. As shown in FIG. 1, the negative electrode board 5 is electrically connected to the rail via an external cable 48.

  In addition, since various signals such as control signals, failure signals, status signals, and analog signals are exchanged between the panels, signal cables can be connected via the inter-panel terminals of each panel. That is, these signal cables are connected to the inter-board terminals in the board, penetrate the wall surface between the boards from the inter-board terminals, are connected to the inter-board terminals of the adjacent board, and are connected to the target device. In this way, the signal cables that pass between the boards and the buses of the main circuit equipment are wired through the wall surfaces between the boards, so that there is no need to provide pits for wiring between boards as in the prior art.

  Further, the negative electrode panel 5 is provided with a space in which the tie disconnector 60 can be mounted as shown in FIG. 1 so as to extend power from the adjacent substation.

  FIG. 5 shows a cross-sectional view of each board of the present invention.

  A roof 51 and a vent 52 (only the rectifier panel 3) are provided at the upper part, and outdoor doors 53a and 53b are provided at the front and rear. Inside the front door 53a, there is a device internal panel 53c, and devices for human interface such as the above-described protective relay, meter, failure indicator, switches, and status indicator lamp are attached. A panel without the internal panel 53c is provided with a partition plate 53d so that maintenance personnel and the like are protected from electric shock to the main circuit equipment and the like. Since the cross-sectional shape and size of the boundary portion of each cubicle are substantially the same, any cubicle can be easily added or separated as necessary.

  FIG. 6 shows an example of the transportation mode of the present invention. Since the substation of the present invention is compact, it can be transported integrally with a trailer. For example, in the substation shown in FIG. 1, the floor size is 3000 mm or less × 6200 mm or less, and the weight is 12 t or less. After assembly is completed at the factory and a comprehensive test is carried out, it can be moved by being suspended by two suspension posts 57 for the entire length of the substation. The column 57 is, for example, an angle having an L-shaped cross section. Since this substation has few parts to be restored locally, the contents of the on-site adjustment test can be greatly reduced.

  FIG. 7 is a diagram illustrating the size of the installation surface necessary for installing the substation according to the present embodiment. This substation is used as a small-to-medium capacity substation, for example, when the feeding voltage is 1500 V, 2000 kW or less, and when 600 V, 1000 kW or less. Compared with the conventional distributed substation as shown in FIG. 11, if the output capacity is about the same, the installation area can be reduced by about 30%.

  As described above, in the substation according to the present invention, each panel is housed in a cubicle and has a rectangular shape as a whole. The cross-sectional shape and size of each cubicle are the same as shown in FIG. In addition, it is possible to manufacture and test in a form where one of the panels of the substation is divided, carry the divided substation to the site by, for example, a plurality of trailers, and connect the divided panels to the site for use. . Therefore, even if the number of systems is slightly increased and the number of planes, that is, the number of panels is increased, the number of divisions can be increased, so that on-site restoration and testing processes can be greatly reduced as compared with conventional distributed devices. Electric railway feeding systems include T-feeding, upper and lower collective feeding, upper and lower collective feeding, etc., but the substation according to the present invention is a substation of these feeding systems. It is configurable.

  In addition, the arrangement | sequence order of each board in the substation which concerns on this invention corresponds with the order through which an electric current flows (processed), as demonstrated with reference to FIG. With such an arrangement, it is possible to minimize the wiring length of the bus and the signal cable between the boards.

(effect)
As described above, according to the present embodiment, a substation for a DC electric railway including an on-site power supply facility, a power receiving facility, a rectifier facility, a feeding facility, a protection / monitoring / control device, an information transmission device, Since the equipment and equipment are housed in multiple outdoor cubicles arranged in one direction, the maintenance space between each equipment required in conventional substations can be eliminated, making the equipment more compact. You can

  Further, the rectifier panel 3 that houses the rectifier transformers 29 and 30 and the rectifier 31 that generate a large amount of heat is provided with a suction port 66 for taking in outside air at the front of the device, and with a ventilation port 52 for discharging outside air on the roof. Therefore, the outside air that has cooled and warmed the transformers 29 and 30 and the rectifier 31 is directly discharged from the vent 52 on the roof. For this reason, heat generated from the rectifier transformers 29 and 30 and the rectifier 31 is not easily transmitted to adjacent devices, so that it is necessary to provide a space between the rectifier panel and other panels as in a conventional substation. Disappear.

  As described above, according to the present embodiment, it is possible to provide a substation that is compact, has a shorter installation / construction period, and requires a shorter period of time and a lower cost than the case where each device has been distributed in the past. Can do.

[Second Embodiment]
FIG. 8 is a diagram showing the configuration of a second embodiment of the DC substation according to the present invention. The high-voltage part of the power supply panel and the power receiving panel is the same as in the first embodiment, but one DC high-speed circuit breaker 56 for rectifier, one DC high-speed circuit breaker for feeding, so as to be able to handle power separately in the upper and lower directions. 2 shows a case in which two tie disconnectors for feeding are accommodated so that two 35 can be extended. 54P board 58 and 54F2 board 59 increase, and it becomes a 7-sided structure in total.

(effect)
In the case of this embodiment, as in the case of the first embodiment, compared to the case where each device has been distributed in the past, a compact, shorter installation / construction period, and a shorter period of time and a lower cost substation are provided. can do.

[Third embodiment]
FIG. 9 is a diagram showing the configuration of a third embodiment of the DC substation according to the present invention. In the third embodiment, a transformer / battery panel 6 is added to the configuration of the first embodiment, and this transformer / battery panel 6 includes a converter 61, a storage battery device 62, and a DC high voltage for converter / storage battery protection. A speed breaker 63 and a selective failure device 64 are included.

  FIG. 10 shows the charge / discharge logic of the storage battery device 62. In general, a rectifier has a voltage characteristic that an output voltage increases at a light load and decreases at a heavy load. The present invention makes use of this characteristic to constantly measure the voltage of the DC bus 67 and charge when the voltage is equal to or higher than the predetermined voltage V1 (light load or no load), and is equal to or lower than the predetermined voltage V1. Discharge at the time (heavy load or load). The voltage V1 is, for example, 1000V to 1590V when the rated feeding voltage is 1500V.

(effect)
According to the third embodiment, the peak power of the rectifier of the rectifier panel 3 can be cut by supplying power from the storage battery 62 at heavy load, and the rated capacity reduction of the rectifier generally having an overload capacity can be reduced. Is possible. By reducing the rectifier capacity, the capacity of the rectifier transformer is also reduced, and the size of the rectifier panel 3 can be reduced. In addition, since the amount of received power can be reduced, the contracted power can be lowered and the electric power charges for substation operators can be lowered.

  The above description is an embodiment of the present invention, and does not limit the apparatus and method of the present invention, and various modifications can be easily implemented.

The arrangement | positioning single figure which shows the structure of the substation of this invention. The outline drawing which shows the structure of the substation of this invention. The schematic sectional side view of a power supply panel. The schematic sectional side view of a rectifier board. Sectional drawing which shows schematic structure in a board. The situation figure of suspension of a substation. The figure which shows the size of a substation installation surface. Single layout diagram in case of electric system with separate upper and lower areas. An example of a substation with a storage battery. The charge / discharge conceptual diagram of a storage battery. The top view which shows an example of the conventional substation for electric railways.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Power supply board, 2 ... Power receiving board, 3 ... Rectifier device board, 4 ... Positive electrode board, 5 ... Negative electrode board, 6 ... Load switch, 7 ... In-house transformer, 8 ... DC power supply device, 9 ... Low voltage mains cutoff , 10 ... Distribution circuit breaker, 11 ... Voltmeter, 12 ... Ammeter, 13 ... Fault indicator, 14 ... Control switch, 15 ... Fault indicator lamp, 16 ... VT, 17 ... Power receiving circuit breaker, 18 ... CT: 19 ... Rectifier circuit breaker, 20 ... Receiving overcurrent relay, 21 ... Underpower receiving relay, 22 ... Overcurrent relay for protecting rectifier equipment, 23 ... Receiving system multimeter, 24 ... Rectifier system multimeter, 25 ... Circuit breaker , Disconnector status indicator lamp (inside panel), 26 ... circuit breaker, disconnector status indicator lamp (panel surface), 27 ... in-panel bus (power receiving panel to power panel), 28 ... in-panel bus (receiving board to rectifier panel) ), 29 ... 1 group 6 pulse rectifier transformer, 30 ... 2 group 6 pulse rectifier Transformer for equipment, 31 ... 12 pulse rectifier, 32 ... Dial thermometer, 33 ... In-board bus (rectifier panel to negative pole), 34 ... In-board bus (rectifier panel to positive pole), 35 ... DC high speed cutoff 36 .... DELTA.ICT, 37 ... feeder disconnector, 38 ... lightning arrester disconnector, 39 ... lightning arrester, 40 ... external cable, 41 ... negative electrode disconnector, 42 ... DCPT, 43 ... DCPT fuse disconnector, 44 ... Failure selection device, 45 ... Power supply for failure selection device, 46 ... Ground fault overvoltage relay, 47 ... Holding current device, 48 ... External cable (negative electrode), 49 ... Door for DC power supply device, 50 ... Transmission device, 51 ... Roof, 52 ... Ventilation port, 53 ... Door, 54 ... PAS, 55 ... MOF, 56 ... High-speed air circuit breaker for rectifier, 57 ... Hanging angle, 58 ... 54P board, 59 ... 54F2 board, 60 ... Tie disconnector, 61 ... Converter, 62 ... Battery, 3 ... transducer DC high-speed circuit breaker, 64 ... transducer, battery protection fault selector, 65 ... battery, 66 ... air intake port, 67 ... DC bus.

Claims (11)

  A substation for a DC electric railway including an on-site power supply facility, a power receiving facility, a rectifier facility, a feeding facility, a protection / monitoring / control device, and an information transmission device, wherein the facility and the device are arranged in a plurality of directions. DC substation characterized by being housed in an outdoor cubicle.   2. The DC substation according to claim 1, wherein the in-house power supply facility, the power receiving facility, the rectifier facility, and the feeding facility are connected by a power cable and a signal cable penetrating a wall surface between the facilities.   The rectifier equipment includes a rectifier transformer and a rectifier, and the cubicle in which the rectifier equipment is accommodated has a side surface parallel to a direction in which the plurality of cubicles are arranged, and a ventilation opening in the roof portion. The DC substation according to claim 2. The rectifier equipment includes a rectifier transformer and a rectifier, and the equipment is disposed in the order of in-house power supply equipment, power receiving equipment, rectifier equipment, power feeding equipment,
The DC substation according to claim 2, wherein the cubicle in which the rectifier equipment is accommodated is provided with a side surface parallel to a direction in which the plurality of cubicles are arranged, and a ventilation opening in the roof portion. .   2. A protective relay failure indicator, a switch status indicator, various meters, and a switch control switch are attached to side surfaces of the in-house power supply facility, power receiving facility, rectifier facility, and feeder facility. The listed DC substation.   The on-site power supply facility includes a converter for converting low-voltage alternating current to direct current and a storage battery as a unit with a carriage, and the unit is configured to be able to be taken in and out of the outdoor cubicle during installation and inspection. The DC substation according to claim 1.   2. The DC substation according to claim 1, wherein the in-house power supply facility includes a DC power supply device, an in-house transformer, a load switch, a low-voltage distribution circuit breaker, and a transmission device, and is housed in one cubicle. Where. The cross-sectional shape and size in a direction orthogonal to the direction in which the plurality of cubicles are arranged are the same, and two angles of an L-shaped section for suspension over the entire length of the plurality of cubicles are provided on the top, 2. The DC substation according to claim 1, wherein the DC substation is movable by being suspended at an angle .   The DC substation according to claim 1, wherein the DC substation is configured to be divided at at least one of boundary portions that partition the plurality of cubicles.   2. The DC substation according to claim 1, wherein the DC substation is configured as at least one feeding type substation among at least T-shaped feeding, upper and lower batch feeding, and upper and lower feeding.   2. The DC substation according to claim 1, wherein the electric railway power supply equipment includes a cubicle that houses a storage battery device that is charged when there is no load and is discharged when the load is applied.

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