Power supply system for water gate equipment

Abstract

To provide a power supply system for a floodgate facility that can open the gate even during a power outage and can be operated using only a single-phase AC power source without modifying the existing floodgate facility. [Solution] A power supply system that supplies power to a floodgate facility comprising a gate body 10, a floodgate opening / closing mechanism 20 including an electric motor 23 powered by three-phase AC power, and a control device 32 that operates on single-phase AC power and controls the opening and closing of the floodgate by controlling the floodgate opening / closing mechanism 20, and is equipped with a storage battery 41, a converter 51 that converts single-phase AC power supplied from a commercial single-phase AC power source 2 into DC power and charges the storage battery 41, and an inverter 52 that converts the DC power converted by the converter 51 and / or the DC power supplied from the storage battery 41 into three-phase AC power to supply it as a power source for the electric motor 23, and also converts regenerative power generated by the electric motor 23 when the floodgate is closed into DC power to charge the storage battery 41.

Description

[Technical field]

[0001] The present invention relates to a power supply system for a water gate facility. [Background technology]

[0002] Water gate equipment installed in various waterways such as rivers and waterways includes a gate body that can be raised and lowered, a water gate opening and closing mechanism including an electric motor that drives the gate body, and a control device that controls the water gate opening and closing mechanism. The gate body is raised and lowered by driving and controlling the water gate opening and closing mechanism to open and close the water gate. Water gate opening and closing mechanisms include rack type, wire rope winch type, spindle type, and the like. In addition, water gate equipment includes a self-weight lowering function that lowers the gate body by its own weight without using the driving force of an electric motor to close the water gate. Here, since a lot of energy is required to raise the gate body, a three-phase AC of 200V is used as the power source for the electric motor, while a single-phase AC of 100V is often used as the power source for other devices and functions (see Patent Document 1). That is, conventional water gate equipment is operated by supplying three-phase AC power of 200V and single-phase AC power of 100V.

[0003] Incidentally, some of the above-mentioned gravity lowering functions require a power source to synchronize and control a brake device and multiple electric motors to enable the gate body to lower under its own weight safely and reliably. This type of water gate requires at least power to operate the gravity lowering function so that the water gate can be closed even in the event of a power outage caused by a disaster such as an earthquake or typhoon. In order to address this, Patent Document 1 proposes providing an uninterruptible power supply or the like to the water gate equipment. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2019-218720 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, the amount of power that can be supplied by an uninterruptible power supply is relatively small, and it is difficult to cover the amount of power required to drive the motor to raise the gate body using this uninterruptible power supply. For this reason, the only gate operation that can be performed during a power outage with the one described in Patent Document 1 is to close the gate using the gravity lowering function, and it is not possible to open the gate by driving the motor. This is because, in the past, only emergency shutoff was required in disasters that cause power outages, such as earthquakes and typhoons, and the one described in Patent Document 1 was considered to have no particular operational problems. However, due to problems such as flow rate adjustment, there is currently a demand to reopen a gate that has been closed once during a power outage. For example, there are cases where the change in flow rate due to a disaster is so sudden that it becomes unnecessary to close the gate in a short time, or where the power outage due to a malfunction of the power supply equipment has become prolonged but the flow rate has already stabilized. Furthermore, there is a demand to realize such a gate opening function during a power outage without making major modifications to existing gate equipment. Furthermore, as mentioned above, conventional floodgate equipment required two power sources, one for commercial three-phase AC and one for commercial single-phase AC, but there is also a demand to have only commercial single-phase AC as a power source in order to reduce installation costs, etc.

[0006] The present invention was made in consideration of the above circumstances, and its first object is to provide a power supply system for a floodgate facility that allows the gate to be opened even during a power outage. The second object is to provide a power supply system for a floodgate facility that allows the gate to be opened even during a power outage without requiring major modifications to the existing floodgate facility. The third object is to provide a power supply system for a floodgate facility that can be operated using only a single-phase AC power source. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, the present invention is a power supply system for a floodgate equipment that supplies power to a floodgate equipment that includes a gate body for opening and closing the floodgate, a floodgate opening and closing mechanism including an electric motor that uses three-phase AC power as a power source to drive the gate body, and an opening and closing control device that operates on single-phase AC power and controls the opening and closing of the floodgate by controlling the floodgate opening and closing mechanism, and is characterized in that the system includes a storage battery, a first power conversion circuit that converts single-phase AC power supplied from a commercial single-phase AC power source into DC power and charges the storage battery, and a second power conversion circuit that converts the DC power converted by the first power conversion circuit and / or the DC power supplied from the storage battery into three-phase AC power and supplies it to the floodgate equipment as a power source for the electric motor, and also converts regenerative power generated by the electric motor when the floodgate is closed into DC power. Effect of the Invention

[0008] According to the present invention, during normal operation, single-phase AC power supplied from a commercial single-phase AC power source is converted to DC power and charged into a storage battery, and the converted DC power is then converted to three-phase AC power and supplied to the floodgate equipment. During a power outage, the power stored in the storage battery is converted to three-phase AC power and supplied as a power source for the motor. Therefore, the motor can be driven to open the gate even during a power outage. Furthermore, the floodgate equipment can be operated using only a commercial single-phase AC power source. Furthermore, the power supply system according to the present invention can be applied to existing floodgate equipment that operates using a three-phase AC power source and a single-phase AC power source without making any major modifications. [Brief description of the drawings]

[0009] [Figure 1] Schematic diagram of the power supply system for water gate facilities [Diagram 2] FIG. 1 is a diagram for explaining the flow of power in the first embodiment (normal time); [Diagram 3] FIG. 1 is a diagram for explaining the flow of power in the first embodiment (during a power outage); [Figure 4] FIG. 13 is a diagram for explaining the flow of power in the second embodiment (during a gate closing operation); [Diagram 5]FIG. 13 is a diagram for explaining the flow of power in the second embodiment (when a power panel malfunctions, etc.) [Figure 6] A diagram explaining an example of connecting another power source [Figure 7] A diagram explaining an example of connecting another power source DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] (First embodiment) A power supply system for a floodgate facility according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a power system for a floodgate facility. In this embodiment, in order to simplify the explanation, only the configuration related to the gist of the invention is illustrated. In FIG. 1, signal lines related to control are indicated by dotted lines. In this embodiment, a wire rope winch type floodgate facility will be described.

[0011] As shown in Fig. 1, the water gate equipment according to the present embodiment includes a gate body (gate) 10 for opening and closing the water gate, a water gate opening and closing mechanism 20, a machine side operation panel 30, a battery panel 40, a power panel 50, and a power supply switching panel 60. Here, the gate body 10, the water gate opening and closing mechanism 20, and the machine side operation panel 30 are existing conventional equipment. This existing water gate equipment is supplied with a commercial 200V three-phase AC power source 1 and a commercial 100V single-phase AC power source 2 from a power company. The power supply system according to the present invention includes the battery panel 40, the power panel 50, and the power supply switching panel 60, and by applying this power supply system to the existing water gate equipment, it is possible to operate the equipment during a power outage.

[0012] The watergate opening and closing mechanism 20 includes a wire rope 21 that suspends the gate body 10, a drum 22 that winds up the wire rope 21, and an electric motor 23 that is connected to the drum 22 and drives it to rotate. The watergate opening and closing mechanism 20 also includes a brake device (not shown) that limits the descent speed when lowering the gate body 10. Here, the electric motor 23 and the brake device are driven by three-phase AC power as a power source.

[0013] The machine-side operation panel 30 is used by connecting a 200V three-phase AC power source and a 100V single-phase AC power source. The machine-side operation panel 30 includes a control device 31, a drive circuit 32, and a remote control device 33. The control device 31 controls various devices including the drive circuit 32, and performs control operations by the user operating an operation button (not shown). The control device 31 operates using 100V single-phase AC as a power source. The control device 31 may have a self-gravity lowering function for controlling a brake device or the like to close the gate by lowering the door body 10 under its own weight. The drive circuit 32 is a circuit that supplies 200V three-phase AC power to the motor 23 and the brake device under the control of the control device 31. The remote control device 33 controls the control device 31 from a remote location and transmits various information to the remote location. The various information is, for example, monitoring information such as status information of the machine-side operation panel 30 and water level information.

[0014] The battery panel 40 is a device that houses a storage battery 41 and a power supply control circuit (not shown). The storage battery 41 is a large-capacity storage battery that stores and discharges DC power, such as a lithium-ion battery, a lead storage battery, or a nickel-metal hydride battery. The power supply control circuit controls the charging of DC power within a predetermined voltage range supplied from outside to the storage battery 41. The power supply control circuit also controls the output of the DC power stored in the storage battery 41 at a predetermined set voltage.

[0015] The power panel 50 includes a converter 51 , first and second inverters 52 , 53 , a control device 54 , and a remote control device 55 .

[0016] Converter 51 converts single-phase AC power supplied from commercial 100V single-phase AC power source 2 into DC power of a predetermined voltage, and supplies this DC power to storage battery 41 for charging, and also supplies it to inverters 52 and 53 .

[0017] The first inverter 52 does not operate under normal circumstances, that is, when single-phase AC power is supplied from the commercial 100V single-phase AC power source 2 and DC power is output from the converter 51. On the other hand, when the supply of single-phase AC power from the commercial 100V single-phase AC power source 2 is interrupted and the output from the converter 51 is interrupted, the first inverter 52 converts the DC power supplied from the storage battery 41 into 200V three-phase AC power under the control of a control device 54 described later and supplies it as a power source for driving the electric motor 23, etc. Also, when the water gate is closed during a power outage described later, the first inverter 52 converts regenerative power generated by the electric motor 23 into DC power and supplies it to the storage battery 41 as DC power for charging.

[0018] The second inverter 53 does not operate normally, that is, when single-phase AC power is supplied from the commercial 100V single-phase AC power source 2 and DC power is output from the converter 51. On the other hand, when the supply of single-phase AC from the commercial 100V single-phase AC power source 2 is interrupted and the output from the converter 51 is interrupted, the second inverter 53 converts the DC power supplied from the storage battery 41 into 100V single-phase AC power and supplies it as a control power source for the machine-side operation panel 30.

[0019] The control device 54 controls the first inverter 52 and the power supply switching panel 60. Signal take-out units 34 are installed at various locations on the machine-side operation panel 30, and the control device 54 receives operation signals from the machine-side operation panel 30 taken out by the signal take-out units 34. The control device 54 operates on the 100V single-phase AC power supplied by the second inverter 53. The control device 54 does not operate under normal circumstances, that is, when single-phase AC power is supplied from the commercial 100V single-phase AC power source 2 and DC power is output from the converter 51. On the other hand, when the supply of single-phase AC power from the commercial 100V single-phase AC power source 2 is interrupted and the output from the converter 51 is interrupted, the control device 54 controls the output of the first inverter 52 based on the operation signal acquired from the machine-side operation panel 30, and also controls the power supply switching panel 60 based on the operation of an operation unit (not shown) or an instruction from a remote control device 55.

[0020] The remote control device 55 controls the control device 54 from a remote location and transmits various information to the remote location. The various information is, for example, status information of the power panel 50.

[0021] Incidentally, since 200V three-phase AC power is sometimes called "power," in this embodiment, the name "power panel 50" is used to mean "a device that supplies 'power' to the floodgate equipment."

[0022] The power supply switching panel 60 includes a first switch 61, a second switch 62, and a third switch 63. The first switch 61 switches the supply source of 200V three-phase AC power to the machine-side operation panel 30 between the commercial 200V three-phase AC power source 1 and the power panel 50. The first switch 61 can detect the presence or absence of power supply from the commercial 200V three-phase AC power source 1, and is set so that the supply source of 200V three-phase AC power to the machine-side operation panel 30 is the commercial 200V three-phase AC power source 1 as shown in FIG. 1 while power is being supplied from the commercial 200V three-phase AC power source 1. On the other hand, while power is not being supplied from the commercial 200V three-phase AC power source 1, the first switch 61 switches so that the supply source of 200V three-phase AC power to the machine-side operation panel 30 is the power panel 50.

[0023] The second switch 62 switches the supply source of 100V single-phase AC power to the machine-side operation panel 30 between the commercial 100V single-phase AC power source 2 or the power panel 50. The second switch 62 can detect the presence or absence of power supply from the commercial 100V single-phase AC power source 2, and while power is being supplied from the commercial 100V single-phase AC power source 2, as shown in Fig. 1, is set so that the supply source of 100V single-phase AC power to the machine-side operation panel 30 is the commercial 100V single-phase AC power source 2. On the other hand, while power is not being supplied from the commercial 100V single-phase AC power source 2, the second switch 62 switches so that the supply source of 100V single-phase AC power to the machine-side operation panel 30 is the power panel 50.

[0024] The third switch 63 switches the connection destination of the motor 23, the brake device, etc. between the machine-side operation panel 30 and the power panel 50. The third switch 63 can detect the presence or absence of power supply from the commercial 200V three-phase AC power source 1, and is set so that the connection destination of the motor 23, the brake device, etc. is the machine-side operation panel 30 while power is being supplied from the commercial 200V three-phase AC power source 1, as shown in Fig. 1. On the other hand, the third switch 63 switches the connection destination of the motor 23, the brake device, etc. to the power panel 50 while power is not being supplied from the commercial 200V three-phase AC power source 1.

[0025] Next, the flow of power in the power supply system of the water gate facility will be described with reference to Figures 2 and 3. In the figures, solid lines indicate lines through which power is being supplied, and dotted lines indicate lines through which power is not being supplied.

[0026] 2 shows a case where three-phase AC power is supplied from a commercial 200V three-phase AC power source 1 and single-phase AC power is supplied from a commercial 100V single-phase AC power source 2. In this case, power is supplied from the AC power sources 1 and 2 to the machine-side operation panel 30 via a power source switching panel 60. In addition, 100V single-phase AC power is also supplied to the power panel 50, and this power charges the storage battery 41. In this state, the water gate equipment can be operated to both open and close the gate. In addition, regenerative power generated in the motor 23 during the closing operation is regenerated to the commercial 200V three-phase AC power source 1.

[0027] 3 shows a case where the supply of three-phase AC power from the commercial 200V three-phase AC power source 1 and single-phase AC power from the commercial 100V single-phase AC power source 2 is stopped during a power outage. In this case, the power source switching panel 60 detects the power outage and switches 61, 62, and 63. The power panel 50 also detects the power outage, and the second inverter 53 starts operating using the DC power stored in the storage battery 41 as a power source, supplying 100V single-phase AC power to the machine-side operation panel 30 and each part of the power panel 50. As a result, when the operation to open the gate is performed on the machine-side operation panel 30, the control device 54 drives and controls the first inverter 52 in response to the operation, and 200V three-phase AC power is supplied from the first inverter 52 to the motor 23 and the machine-side operation panel 30 using the DC power stored in the storage battery 41 as a power source. The reason why 200V three-phase AC power is supplied not only to the motor 23 but also to the machine-side operation panel 30 is that it is necessary for the machine-side operation panel 30 to operate normally. When the closing operation is performed on the machine-side operation panel 30, the regenerative power generated by the motor 23 is converted to DC power by the first inverter 52 and charged into the storage battery 41. In this way, even during a power outage, the gate can be both opened and closed.

[0028] Thus, according to the power supply system for floodgate equipment of this embodiment, during normal times, single-phase AC power supplied from the commercial 100V single-phase AC power source 2 is converted to DC power and charged into the storage battery 41. On the other hand, during a power outage, the power stored in the storage battery 41 is converted to single-phase AC power and three-phase AC power and supplied to the floodgate equipment as the power source for the machine-side operation panel 30 and the electric motor 23. Therefore, even during a power outage, the electric motor 23 can be driven to open the gate. Moreover, the power supply system of this embodiment can be applied to existing floodgate equipment that operates using a three-phase AC power source and a single-phase AC power source without making major modifications, etc.

[0029] (Second embodiment) A power supply system for a floodgate facility according to a second embodiment of the present invention will be described with reference to the drawings. This embodiment differs from the first embodiment in that the commercial power source supplied to the floodgate facility is only a 100V single-phase AC power source. The configuration of the floodgate facility is the same as that of the first embodiment. Therefore, a 200V three-phase AC power source is required when operating the floodgates of the floodgate facility. Therefore, before the application of the power supply system according to the present invention, 200V three-phase AC power was supplied by a generator installed separately, but in this embodiment, 200V three-phase AC power is supplied by the power supply system instead of the generator.

[0030] The flow of power in the power supply system of the water gate facility will be described with reference to Figures 4 to 5. In the figures, solid lines indicate lines through which power is being supplied, and dotted lines indicate lines through which power is not being supplied.

[0031] In this embodiment, as shown in Figures 4 and 5, since a commercial 200V three-phase AC power supply is not connected, the first switch 61 of the power supply switching panel 60 is automatically switched so as to always supply 200V three-phase AC from the power panel 50 to the machine-side operation panel 30. Similarly, since a commercial 200V three-phase AC power supply is not connected, the third switch 63 of the power supply switching panel 60 is automatically switched so that the connection destination of the electric motor 23, the brake device, etc. is the power panel 50.

[0032] FIG. 4 shows a case where single-phase AC power is supplied from a commercial 100V single-phase AC power source 2. In this case, power is supplied from the commercial 100V single-phase AC power source 2 to the machine-side operation panel 30 via the power supply switching panel 60. Also, 100V single-phase AC power is supplied to the power panel 50. During standby when the floodgate is not opened or closed, the single-phase AC power from the commercial 100V single-phase AC power source 2 is converted to DC power and the storage battery 41 is charged. When an opening operation is performed on the machine-side operation panel 30, the first inverter 52 is driven and controlled by the control device 54 in response to the operation, and 200V three-phase AC power is supplied from the first inverter 52 to the electric motor 23 and the machine-side operation panel 30 using the DC power stored in the storage battery 41 as a power source. Also, when a closing operation is performed on the machine-side operation panel 30, the regenerative power generated by the electric motor 23 is converted to DC power by the first inverter 52 and charged to the storage battery 41. In this way, both opening and closing of the gate can be performed.

[0033] FIG. 5 shows a case where a power failure occurs, that is, where the supply of single-phase AC power from the commercial 100V single-phase AC power source 2 is stopped. In this case, the power supply switching panel 60 detects the power failure and switches the second switch 62. The power panel 50 also detects the power failure, and the second inverter 53 starts operating using the DC power stored in the storage battery 41 as a power source, and supplies 100V single-phase AC power to each part of the machine-side operation panel 30 and the power panel 50. When an operation to open the gate is performed on the machine-side operation panel 30, the control device 54 drives and controls the first inverter 52 in response to the operation, and 200V three-phase AC power is supplied from the first inverter 52 to the electric motor 23 and the machine-side operation panel 30 using the DC power stored in the storage battery 41 as a power source. When an operation to close the gate is performed on the machine-side operation panel 30, the regenerative power generated by the electric motor 23 is converted to DC power by the first inverter 52 and charged to the storage battery 41. In this way, even during a power failure, both opening and closing of the gate can be performed.

[0034] As described above, the power supply system according to the present invention can be applied to water gate facilities that are not supplied with commercial 200V three-phase AC power. Other functions and effects are the same as those of the first embodiment.

[0035] In the above-described embodiments, the storage battery 41 is charged by the power supplied from the commercial 100V single-phase AC power source 2, but it is possible to connect another power source to the storage battery 41 to charge the storage battery 41. For example, as shown in FIG. 6, a solar power generation device 3 can be connected to the storage battery 41. Similarly, as shown in FIG. 6, a vehicle 4 such as a hybrid car or an electric car can be connected to the storage battery 41. In particular, a hybrid car or an electric car is equipped with a large-capacity storage battery and can output DC power at a large current. Therefore, even if the amount of power stored in the storage battery 41 is small, it is useful because the storage battery 41 can be charged in a short time.

[0036] Furthermore, in each of the above embodiments, the DC power stored in the storage battery 41 is converted to AC power by the power panel 50 and supplied to the floodgate equipment, but as shown in Figure 7, a vehicle 4 such as a hybrid vehicle or an electric vehicle can be connected to the power panel 50, and the DC power supplied from the vehicle 4 can be converted to AC power by the power panel 50 and supplied to the floodgate equipment.

[0037] Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above embodiment, and various improvements and modifications may be made without departing from the spirit and scope of the present invention.

[0038] For example, in the above embodiments, the existing water gate equipment requires 200V three-phase AC for both opening and closing, but the present invention can be implemented with other water gate equipment. For example, the present invention can be implemented with water gate equipment that has a self-weight lowering function that does not require 200V three-phase AC for closing. Also, for example, the present invention can be implemented with water gate equipment of a type that does not generate regenerative power when closing. Also, in the above embodiments, the wire rope winch type water gate equipment is described, but the present invention can be implemented with other types of water gate equipment such as rack type and spindle type.

[0039] Further, in each of the above embodiments, the storage battery panel 40, the power panel 50, and the power supply switching panel 60 are implemented as separate devices, but these devices may be implemented in any combination. [Explanation of symbols]

[0040] 1…Commercial 200V three-phase AC power supply 2...Commercial 100V single-phase AC power supply 3. Solar power generation equipment 4. Vehicle 10...Gate 20...Water gate opening and closing mechanism 23...Electric motor 30…Machine side control panel 31...Control device 32...Drive circuit 40…Battery panel 41…Battery 50…Power panel 51…Converter 52…First inverter 53…Second inverter 54...Control device 60…Power switch board

Claims

1. A power supply system for a water gate facility that supplies power to the water gate facility, the water gate facility including a gate body for opening and closing the water gate, a water gate opening / closing mechanism including an electric motor for driving the gate body using three-phase AC power as a power source, and an opening / closing control device that operates using single-phase AC power and controls the water gate opening / closing mechanism to control the water gate, A storage battery, a first power conversion circuit that converts single-phase AC power supplied from a commercial single-phase AC power source into DC power and charges a storage battery; and a second power conversion circuit that converts the DC power converted by the first power conversion circuit and / or the DC power supplied from the storage battery into three-phase AC power and supplies it to the water gate equipment as a power source for the electric motor, and also converts regenerative power generated by the electric motor during the closing operation of the water gate into DC power to charge the storage battery. A power supply system for a water gate facility.

2. Supplying power to existing floodgate facilities 2. The power supply system for water gate facilities according to claim 1.

3. A machine side operation panel accommodating the opening and closing control device; A battery panel housing the battery; a power panel housing the first power conversion circuit and the second power conversion circuit; and a power switching panel housing a switch for switching the connection destination of the electric motor to either the machine side operation panel or the power panel.

2. The power supply system for water gate facilities according to claim 1.

4. The gate is closed by lowering the gate body under its own weight.

2. The power supply system for water gate facilities according to claim 1.

5. The storage battery is configured to be rechargeable by power supplied from a solar power generation device.

2. The power supply system for water gate facilities according to claim 1.

6. The storage battery is configured to be rechargeable by power supply from an electric vehicle or a hybrid vehicle.

2. The power supply system for water gate facilities according to claim 1.

7. The second power conversion circuit converts DC power supplied from an electric vehicle or a hybrid vehicle into three-phase AC power and supplies the power as a power source for an electric motor.

2. The power supply system for water gate facilities according to claim 1.

Images