JP7126422B2 - LNG satellite facility - Google Patents

Description

The present invention includes a fuel gas supply unit that supplies a fuel gas containing natural gas obtained by vaporizing LNG to a power generation device, a power generation device that consumes the fuel gas supplied from the fuel gas supply unit to generate power, The present invention relates to an LNG satellite facility including an AC line to which power is supplied from at least one of a power system and a power generation device.

From an LNG receiving terminal that receives an LNG tanker that transports LNG (liquefied natural gas), LNG is transported to an LNG satellite base using, for example, an LNG truck, and the LNG satellite base produces gas of a desired calorific value. It is The LNG satellite facility, which is composed of equipment provided at the LNG satellite base, includes a fuel gas supply unit that supplies fuel gas including natural gas obtained by vaporizing LNG to the power generation device, and a fuel gas supply unit that supplies fuel gas. A power generation device that consumes fuel gas to generate power may also be installed. If it is possible to operate such a power generation device while the power system is out of power, it will be possible to vaporize LNG even while the power system is out of power. power load can be supplied.

Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2008-144877) describes equipment in which a cogeneration system as a power generator is installed at an LNG satellite base. This cogeneration system operates by consuming natural gas obtained by vaporizing LNG supplied from tank trucks that transport LNG, and supplies the heat and power generated by the cogeneration system to the LNG satellite base.

In the facility described in Patent Document 1, a hot water type one using heat generated in a cogeneration system is provided as a vaporization unit for vaporizing LNG at an LNG satellite base. In addition, although not described in Patent Document 1, electrical equipment such as a pump for circulating hot water and a solenoid valve for opening and closing the flow path of LNG and gas are necessary. Electricity is required.
In addition, at an LNG satellite base, a boiler that heats a heat medium using the combustion heat of gas is provided, and a vaporization unit that vaporizes LNG with the heat of the heat medium heated by the boiler may be used. Even in such a vaporization unit, an electric device such as a solenoid valve for opening and closing the LNG or gas flow path is necessary. In addition, the boiler as described above requires electric power to operate a fan or the like that supplies air used for gas combustion to the boiler, and to operate a pump that causes the heat medium to flow.

JP 2008-144877 A

In the event of a power outage in the power system that supplies power to the LNG satellite base, even if a start-up power source is provided to start the power generator, power must be supplied to the fuel gas supply unit including the vaporization unit. , the fuel gas cannot be supplied to the power generation device, leading to a situation in which the power generation device cannot be started or continued to operate during a power failure of the power system.

In addition, it is also possible to install an emergency generator or an uninterruptible power supply to supply power to the fuel gas supply unit and supply power to the fuel gas supply unit in the event of a power failure in the power system. be. However, installing an emergency power generator causes problems such as increasing the size of the facility, increasing the cost, and requiring continuous maintenance and management. However, there arises a problem that the size increases and the cost rises.

Therefore, even if you install an uninterruptible power supply that can supply power to the fuel gas supply unit, installing an uninterruptible power supply that can supply power for a short time is a realistic response to power failures in the power system. It is considered to be. In that case, if the power generator is to be started in a short time after a power failure in the power system, the LNG is vaporized by the vaporizer of the fuel gas supply unit operated by the power supplied from the uninterruptible power supply. Fuel gas, including natural gas that has been converted and vaporized, can be supplied to the power plant.

However, even if the fuel gas can be supplied to the power generator, the power generator may not be started early due to problems on the power generator side. For example, if a procedure such as operating a circuit breaker to switch the power supply path to the power load is necessary before starting the generator set under the condition of a power failure in the power system, such a circuit breaker It takes a long time to operate the power generator, and it may not be possible to start the power generator early. Further, in the case where the power generator has an engine that consumes fuel gas to operate and a generator that is driven by the engine, if an abnormality such as engine knocking or misfire occurs, the power generator cannot be started early. It is possible.

If the generator cannot be started quickly after a power failure occurs in the power system (for example, within the power supply time of the uninterruptible power supply), the fuel gas supply unit will not be able to supply power from the uninterruptible power supply. It is no longer performed (that is, the solenoid valve and the like are no longer operable), leading to a situation in which the fuel gas cannot be supplied to the power generation device. In addition, since the power supply from the uninterruptible power supply is not performed on the fuel gas supply unit side, the fuel gas supply unit is in a state of serious failure stop (for example, an emergency shutoff valve provided in the flow path of LNG or gas closed state, etc.). In this case, even if the power generator can be started by using the starting power supply, the fuel gas supply unit does not resume operation, so the fuel gas is not supplied to the power generator and the power generator cannot continue to operate.

The present invention has been made in view of the above problems, and its object is to start the operation of the power generation device and continue the operation even if the power supply from the power system is stopped for a long time. The point is to provide satellite facilities.

The characteristic configuration of the LNG satellite facility according to the present invention for achieving the above object is a fuel gas supply unit that supplies fuel gas including natural gas obtained by vaporizing LNG to the power generation device, and from the fuel gas supply unit An LNG satellite facility comprising the power generation device that consumes the supplied fuel gas to generate power, and an AC line to which power is supplied from at least one of the power system and the power generation device,
An auxiliary power supply device having an electricity storage unit connected to the AC line, capable of storing electric power supplied to the AC line in the electricity storage unit, and supplying electric power for starting the power generation device to the power generation device. prepared,
The fuel gas supply unit has a vaporization unit that retains the supplied heat and vaporizes the LNG by a temperature difference between the retained heat and the LNG, and a heat supply unit that supplies heat to the vaporization unit. the heat supply unit is configured to operate by receiving power supply from the AC line, and the vaporization unit is configured to operate by receiving power supply from a power switching device connected to a plurality of power supply sources,
When power is supplied to the AC line from at least one of the electric power system and the power generation device, the power switching device supplies the power supplied from the AC line as the power supply source to the vaporizing unit. and, when power is not supplied to the AC line from both the electric power system and the power generation device, power supplied from the auxiliary power supply device as the power supply source is supplied to the vaporization unit. at the point.

According to the above characteristic configuration, when power is supplied to the AC line from at least one of the electric power system and the power generation device, power is supplied from the AC line to the heat supply unit of the fuel gas supply unit. Power is supplied to the vaporization unit from an AC line via a power switching device. That is, in the vaporization section of the fuel gas supply section, LNG can be continuously vaporized using the heat supplied from the heat supply section. As a result, the power generator can continue to operate by consuming the fuel gas continuously supplied from the fuel gas supply unit.

When power is not supplied to the AC line from both the power system and the power generator, that is, even in a situation where, for example, a power failure occurs in the power system and the operation of the power generator is stopped, the vaporization unit It can operate using power supplied via the power switching device from an auxiliary power supply capable of supplying power for starting the power generator. Therefore, even if heat cannot be continuously supplied from the heat supply unit to the vaporization unit because the heat supply unit cannot operate because power is not supplied from the AC line, the temperature of the heat held by the vaporization unit and the LNG As long as there is a difference, fuel gas containing natural gas obtained by vaporizing LNG is supplied to the power generator. As a result, the power generator consumes the fuel gas supplied from the fuel gas supply unit and starts operation even in a situation where a power failure or the like occurs in the power system and the operation of the power generator is stopped. The operation can be continued even if it is temporary.

As described above, in this characteristic configuration, even in a situation where a power failure occurs in the power system and the operation of the power generation device is stopped, the operation of the power generation device is started and the operation is temporarily stopped. By also continuing, a situation is created in which power is supplied from the generator to the AC line. As a result, since electric power is supplied from the AC line to the heat supply section of the fuel gas supply section, heat is continuously supplied from the heat supply section to the vaporization section in the fuel gas supply section, and the supplied heat is used to continuously vaporize LNG in the vaporizer. Since the fuel gas is continuously supplied from the fuel gas supply unit to the power generation device, the power generation device can continue to operate and supply power to the AC line.
Therefore, it is possible to provide an LNG satellite facility that can start and continue the operation of the power generator even if the power supply from the power system is stopped for a long time.

Another characteristic configuration of the LNG satellite facility according to the present invention is that the fuel gas supply unit has a boil-off gas supply unit that supplies boil-off gas generated in an LNG storage tank to the power generation device as the fuel gas,
The boil-off gas supply unit is configured to operate by being supplied with power from the power switching device, and the power switching device receives power from at least one of the power system and the power generation device to the AC line. power supplied from the AC line as the power supply source is supplied to the vaporization unit and the boil-off gas supply unit, and power is supplied to the AC line from both the power system and the power generation device. If not, the configuration is such that power supplied from the auxiliary power supply device as the power supply source is supplied to the vaporization section and the boil-off gas supply section.

According to the above characteristic configuration, when power is not supplied to the AC line from both the power system and the power generator, that is, in a situation where, for example, a power failure occurs in the power system and the operation of the power generator is stopped. However, the vaporization section and the boil-off gas supply section can operate using power supplied via the power switching device from an auxiliary power supply capable of supplying power for starting the power generation device. Therefore, as described above, not only can the natural gas vaporized in the vaporization unit be supplied to the power generation device, but the boil-off gas can be supplied to the power generation device from the boil-off gas supply unit. Therefore, even if the amount of gas that can be supplied from the vaporization section to the power generator is small, the gas supplied from the boil-off gas supply section can cover at least part of the amount of fuel gas required by the power generator.

Still another characteristic configuration of the LNG satellite facility according to the present invention is a fuel gas supply unit that supplies fuel gas including natural gas obtained by vaporizing LNG to the power generation device, and fuel supplied from the fuel gas supply unit. An LNG satellite facility comprising the power generation device that consumes gas to generate power and an AC line to which power is supplied from at least one of the power system and the power generation device,
an auxiliary power supply device having a power storage unit connected to the AC line, capable of storing power supplied to the AC line in the power storage unit, and supplying power for activating the power generation device to the power generation device; ,
An uninterruptible power supply connected to the AC line and the auxiliary power supply and capable of receiving power supply from at least one of the AC line and the auxiliary power supply,
The fuel gas supply unit has a vaporization unit that retains the supplied heat and vaporizes the LNG by a temperature difference between the retained heat and the LNG, and a heat supply unit that supplies heat to the vaporization unit. The heat supply unit is configured to operate by receiving power supply from the AC line, and the vaporization unit is configured to operate by receiving power supply through the uninterruptible power supply.

According to the above characteristic configuration, when power is supplied to the AC line from at least one of the electric power system and the power generation device, power is supplied from the AC line to the heat supply section of the fuel gas supply section. Further, since power is also supplied from the AC line to the uninterruptible power supply, power is continuously supplied from the uninterruptible power supply to the vaporizing section of the fuel gas supply section. That is, in the vaporization section of the fuel gas supply section, LNG can be continuously vaporized using the heat supplied from the heat supply section. As a result, the power generator can continue to operate by consuming the fuel gas continuously supplied from the fuel gas supply unit.

When power is not supplied to the AC line from both the power system and the power generator, that is, even in a situation where, for example, a power failure occurs in the power system and the operation of the power generator is stopped, the vaporization unit It can operate by receiving power stored in an uninterruptible power supply. Furthermore, since power is also supplied from the auxiliary power supply to the uninterruptible power supply, power is continuously supplied from the uninterruptible power supply to the vaporizing section. Therefore, even if heat cannot be continuously supplied from the heat supply unit to the vaporization unit because the heat supply unit cannot operate because power is not supplied from the AC line, the temperature of the heat held by the vaporization unit and the LNG As long as there is a difference, fuel gas containing natural gas obtained by vaporizing LNG is supplied to the power generator. As a result, the power generator consumes the fuel gas supplied from the fuel gas supply unit and starts operation even in a situation where a power failure or the like occurs in the power system and the operation of the power generator is stopped. The operation can be continued even if it is temporary.

As described above, even in a situation where a power failure occurs in the power system and the operation of the power generation equipment is stopped, it is possible to start the operation of the power generation equipment and continue the operation even if it is temporary. , a situation is created in which power is supplied from the generator to the AC line. As a result, since electric power is supplied from the AC line to the heat supply section of the fuel gas supply section, heat is continuously supplied from the heat supply section to the vaporization section in the fuel gas supply section, and the supplied heat is used to continuously vaporize LNG in the vaporizer. Since the fuel gas is continuously supplied from the fuel gas supply unit to the power generation device, the power generation device can continue to operate and supply power to the AC line.
Therefore, it is possible to provide an LNG satellite facility that can start and continue the operation of the power generator even if the power supply from the power system is stopped for a long time.

Still another characteristic configuration of the LNG satellite facility according to the present invention is that the fuel gas supply unit has a boil-off gas supply unit that supplies boil-off gas generated in an LNG storage tank to the power generation device as the fuel gas,
The boil-off gas supply unit is configured to operate by being supplied with power through the uninterruptible power supply.

According to the above characteristic configuration, when power is not supplied to the AC line from both the power system and the power generator, that is, in a situation where, for example, a power failure occurs in the power system and the operation of the power generator is stopped. However, the vaporizer and the boil-off gas supply can operate using power supplied by the uninterruptible power supply. Furthermore, even if the power stored in the uninterruptible power supply runs out, the vaporization section and the boil-off gas supply section can operate using power supplied from the auxiliary power supply via the uninterruptible power supply. Therefore, as described above, not only can the natural gas vaporized in the vaporization unit be supplied to the power generation device, but the boil-off gas can be supplied to the power generation device from the boil-off gas supply unit. Therefore, even if the amount of gas that can be supplied from the vaporization section to the power generator is small, the gas supplied from the boil-off gas supply section can cover at least part of the amount of fuel gas required by the power generator.

Still another characteristic configuration of the LNG satellite facility according to the present invention is that when the power supply from the power system to the AC line is stopped, the power generation device stops generating power and then supplies power from the auxiliary power supply device. is configured to resume power generation by operating using

According to the above characteristic configuration, even if the power supply from the power system to the AC line is stopped, the power generation device can automatically restart power generation by operating using the power supplied from the auxiliary power supply device. Thereby, it is possible to restore the state in which power is supplied to the AC line.

Still another characteristic configuration of the LNG satellite facility according to the present invention is a reservoir that can temporarily store the fuel gas in the middle of the gas flow path through which the fuel gas supplied from the fuel gas supply unit to the power generation device passes. It is provided with a fuel gas reservoir having a space.

According to the above characteristic configuration, even if the amount of natural gas vaporized in the vaporizer is small, a sufficient amount of fuel gas can be supplied from the fuel gas reservoir to the power generation device. Further, even if the amount of gas supplied from the fuel gas supply unit per unit time fluctuates, the fluctuation is mitigated by the fuel gas storage unit and is less likely to be transmitted to the power generator.

Still another characteristic configuration of the LNG satellite facility according to the present invention is that the heat supply unit is configured to resume operation when power supply to the AC line is resumed.

According to the above characteristic configuration, when power supply to the AC line is restarted, the heat supply unit operates by receiving power supply from the AC line, and continuously supplies heat to the vaporization unit. can be done. As a result, the vaporization of LNG in the vaporization section is performed using the heat continuously supplied from the heat supply section.

Still another characteristic configuration of the LNG satellite facility according to the present invention is that the vaporization unit cannot operate the heat supply unit because power is not supplied from the AC line, so heat is transferred from the heat supply unit to the vaporization unit. configured to have a heat medium capable of retaining heat capable of vaporizing LNG to produce a predetermined amount of natural gas even if it cannot be continuously supplied;
The predetermined amount corresponds to the amount of natural gas as the fuel gas consumed by the power generator after the power generator is started until the generated power can be supplied to the AC line. be.

According to the above characteristic configuration, even when heat cannot be continuously supplied from the heat supply unit to the vaporization unit, the LNG is vaporized by the heat retained by the heat medium of the vaporization unit, and the power generation device is started. Then, the amount of natural gas consumed by the power generator can be generated until the generated power can be supplied to the AC line.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the schematic structure of the LNG satellite equipment of 1st Embodiment. FIG. 2 is a diagram showing a state in which power is supplied to an AC line from at least one of a power system and a power generation device; FIG. 3 is a diagram showing a state in which power is not supplied to the AC line from both the power system and the power generator; It is a figure which shows the specific example of an LNG satellite facility. It is a figure which shows the state immediately after a power failure generate|occur|produced in an electric power system. It is a figure which shows the state after an electric power generating apparatus starts. FIG. 4 is a diagram showing a state after power supply from the power system is restarted; It is a figure which shows the state which reconnected the electric power generating apparatus to the electric power system. It is a figure explaining the schematic structure of the LNG satellite facility of 2nd Embodiment. It is a figure which shows the structural example of the fuel gas supply part of 2nd Embodiment. It is a figure explaining the schematic structure of the LNG satellite facility of 3rd Embodiment.

<First Embodiment>
An LNG satellite facility according to a first embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram illustrating a schematic configuration of an LNG satellite facility according to the first embodiment. LNG is transported from an LNG receiving terminal that receives LNG tankers that transport LNG (liquefied natural gas) to an LNG satellite base where LNG satellite facilities are installed, using, for example, LNG trucks. As illustrated, the LNG satellite facility includes a fuel gas supply unit 30 that supplies fuel gas including natural gas obtained by vaporizing LNG to the power generation device 11, and consumes the fuel gas supplied from the fuel gas supply unit 30. and an AC line 2 to which power is supplied from at least one of the power system 1 and the power generation device 11 .

In the example shown in FIG. 1 , an important power load 3 and a general power load 4 are connected to the AC line 2 . Specifically, the AC line 2 is connected to the power system 1 via the circuit breaker A, the important power load 3 is connected to the AC line 2 via the circuit breaker C, and the general power load 4 is connected to the AC line 2 via the circuit breaker D. are connected to the AC line 2. Critical power loads 3 are, for example, major lighting equipment, server equipment, communication equipment, gauges, and the like. The general power load 4 is, for example, a lighting device that can be turned off during a power failure of the power system 1 . Of the power loads provided at the LNG satellite base, which power load is the important power load 3 and which power load is the general power load 4 can be set as appropriate.

The fuel gas supply unit 30 includes a vaporization unit 36 that retains the supplied heat and vaporizes the LNG by a temperature difference between the retained heat and the LNG, and a heat supply unit 31 that supplies heat to the vaporization unit 36. have The heat supply unit 31 operates by receiving power supply from the AC line 2 . The vaporization unit 36 has, for example, an electromagnetic valve that opens and closes a flow path of LNG or gas, and operates by receiving power supply from a power switching device 8 connected to a plurality of power supply sources.

The power generator 11 has an engine 11a that operates by consuming the fuel gas supplied from the fuel gas supply section 30, and a generator 11b that is driven by the engine 11a. The generator 11 b is connected to the AC line 2 . Electric power generated by the generator 11 b is supplied to the AC line 2 .

The LNG satellite facility comprises an auxiliary power supply 20 connected to the AC line 2 . The auxiliary power supply device 20 has a power storage unit 21 connected to the AC line 2 , stores power supplied to the AC line 2 in the power storage unit 21 , and supplies power to the power generation device 11 to start the power generation device 11 . can be supplied to For example, the auxiliary power supply device 20 is a device provided accompanying the power generation device 11 . Therefore, it is preferable that the power storage unit 21 has a capacity sufficient to supply the power required to start the power generation device 11, for example, during a power outage when the power supply from the power system 1 is stopped.

The LNG satellite facility has a power switching device 8 . The power switching device 8 operates to automatically switch the power supply source for the vaporizing section 36 of the fuel gas supply section 30 to either the AC line 2 or the auxiliary power supply device 20 . For example, the power switching device 8 has a contact a connected to the AC line 2 , a contact b connected to the auxiliary power supply device 20 , and a contact c connected to the vaporization section 36 of the fuel gas supply section 30 . Incidentally, these contacts a to c are not limited to those capable of switching between physical contact and non-contact, and may be those capable of switching between conduction and non-conduction using, for example, a semiconductor element. When power is being supplied from the AC line 2 to the contact a, the power supply switching device 8 conducts the contact a and the contact c (that is, the AC line is connected to the vaporization section 36 of the fuel gas supply section 30). 2), and when power is not supplied from the AC line 2 to the contact a, the contact b and the contact c are electrically connected (that is, the vaporizing portion of the fuel gas supply unit 30). 36 is powered by the auxiliary power supply 20).

That is, when power is supplied to the AC line 2 from at least one of the power system 1 and the power generation device 11, the power switching device 8 supplies the power supplied from the AC line 2 as the power supply source to the vaporization unit 36. do. As a result, when power is supplied to the AC line 2 from at least one of the power system 1 and the power generation device 11, power is supplied from the AC line 2 to the heat supply unit 31 of the fuel gas supply unit 30, and the fuel gas is supplied. Electric power is supplied from the AC line 2 to the vaporization section 36 of the section 30 via the power switching device 8 . That is, the vaporization section 36 of the fuel gas supply section 30 can continuously vaporize LNG using the heat supplied from the heat supply section 31 . The power generator 11 can continue to operate by consuming the fuel gas continuously supplied from the fuel gas supply unit 30 .

On the other hand, when power is not supplied to the AC line 2 from both the power system 1 and the power generation device 11, the power switching device 8 receives power from the power storage unit 21 of the auxiliary power device 20 as the power supply source. is supplied to the vaporizer 36 . As a result, even if power is not supplied to the AC line 2 from both the power system 1 and the power generator 11, for example, a power failure occurs in the power system 1 and the power generator 11 stops operating. Even in this situation, the vaporization unit 36 can operate using power supplied from the auxiliary power supply device 20 via the power switching device 8 . Therefore, even if heat cannot be continuously supplied from the heat supply unit 31 to the vaporization unit 36 because the heat supply unit 31 cannot operate because power is not supplied from the AC line 2, the heat held by the vaporization unit 36 is As long as there is a temperature difference between LNG and LNG, fuel gas containing natural gas obtained by vaporizing LNG is supplied to the power generator 11 . As a result, the power generation device 11 consumes the fuel gas supplied from the fuel gas supply unit 30 and operates even in a situation where a power failure or the like occurs in the power system 1 and the operation of the power generation device 11 is stopped. and continue its operation, even temporarily.

As described above, even in a situation where a power failure or the like occurs in the power system 1 and the operation of the power generation device 11 is stopped, the operation of the power generation device 11 is started and the operation is continued even temporarily. By doing so, a situation is created in which power is supplied from the power generator 11 to the AC line 2 . As a result, since power is supplied from the AC line 2 to the heat supply section 31 of the fuel gas supply section 30, heat is continuously supplied from the heat supply section 31 to the vaporization section 36 in the fuel gas supply section 30, In addition, the supplied heat is used to continuously vaporize the LNG in the vaporizer 36 . Since fuel gas is continuously supplied from the fuel gas supply unit 30 to the power generation device 11 , the power generation device 11 can continue to operate and supply power to the AC line 2 .

FIG. 2 is a diagram showing a state in which power is supplied to the AC line 2 from at least one of the power system 1 and the power generation device 11 . In the drawing, the locations where power is being supplied are drawn with thick lines, and the circuit breakers that are turned on (connected) are drawn with thick lines. In the example shown in FIG. 2 , power is supplied to the AC line 2 from both the power system 1 and the generator 11 . The power switching device 8 conducts the contact a and the contact c. As a result, power is supplied from the AC line 2 to the vaporizer 36 of the fuel gas supply unit 30 via the power switching device 8 . Electric power is also supplied from the AC line 2 to the heat supply section 31 of the fuel gas supply section 30 . Therefore, the vaporization section 36 of the fuel gas supply section 30 can continuously vaporize LNG using the heat supplied from the heat supply section 31 .

The power generation device 11 can continuously operate by consuming fuel gas including natural gas continuously supplied from the fuel gas supply unit 30 . The power generator 11 can supply the generated power to the AC line 2 . The power supplied from the generator 11 to the AC line 2 can also be consumed by the important power load 3 and the general power load 4 .

FIG. 3 is a diagram showing a state in which power is not supplied to the AC line 2 from both the power system 1 and the power generator 11. As shown in FIG. For example, FIG. 3 corresponds to the situation immediately after a power outage occurs in the power system 1 . Since power is not supplied to the AC line 2 in this state, the power switching device 8 conducts the contact b and the contact c. As a result, electric power is supplied from the auxiliary power supply device 20 to the vaporization section 36 of the fuel gas supply section 30 via the power supply switching device 8 . Since power is not supplied to the AC line 2 , power is not supplied to the heat supply section 31 of the fuel gas supply section 30 . Therefore, heat is not supplied from the heat supply section 31 to the vaporization section 36 in the fuel gas supply section 30 .

However, even if heat is no longer supplied from the heat supply unit 31 to the vaporization unit 36 in the fuel gas supply unit 30 because power is no longer supplied to the heat supply unit 31 of the fuel gas supply unit 30, the fuel gas The vaporization section 36 of the supply section 30 retains the heat previously supplied from the heat supply section 31 of the fuel gas supply section 30, and there is a temperature difference between the retained heat and the LNG. If so, the LNG can be vaporized in the vaporizer 36 . Then, the fuel gas containing the natural gas vaporized in the vaporization section 36 can be supplied to the power generator 11 . In addition, the auxiliary power supply device 20 can supply power for starting the power generation device 11 to the power generation device 11 . As a result, the power generation device 11 consumes the fuel gas supplied from the fuel gas supply unit 30 to start operation and continue the operation even temporarily.

When the power generation device 11 consumes the fuel gas supplied from the fuel gas supply unit 30 and starts to operate and continues to operate even temporarily, the power generated by the power generation device 11 is supplied to the AC line 2. , the power supply to the heat supply unit 31 is also restarted. As a result, the supply of heat from the heat supply section 31 to the vaporization section 36 is resumed in the fuel gas supply section 30, and the vaporization of LNG in the vaporization section 36 is reliably performed. In addition, by supplying power to the AC line 2 , the power switching device 8 conducts the contact a and the contact c, and power continues to be supplied to the vaporization section 36 from the AC line 2 .
As described above, even in the state immediately after a power failure occurs in the power system 1 as shown in FIG. can be made

FIG. 4 is a diagram showing a specific example of LNG satellite facilities.
The AC line 2 is connected to the power system 1 via the circuit breaker A. A distribution board, a terminal block, and the like are provided in the middle of the AC line 2, and the power line is branched. In the example shown in FIG. 4 , a general power load 4 is connected via a circuit breaker D to the first connection point P1 of the AC line 2 . An important power load 3 is connected via a circuit breaker C to the second connection point P2 of the AC line 2 . A power generator 11 is connected via a circuit breaker F to the third connection point P3 of the AC line 2 . A power generator auxiliary machine 12 such as a pump and a fan used in the power generator 11 is connected to the fourth connection point P4 of the AC line 2 . An auxiliary power supply device 20 is connected to the fifth connection point P5 of the AC line 2 . A power switching device 8 is connected via a transformer 10 to a sixth connection point P6 of the AC line 2 . A heat supply section 31 of a fuel gas supply section 30 is connected to the seventh connection point P7 of the AC line 2 .

A circuit breaker B is provided between the first connection point P1 and the second connection point P2 of the AC line 2, and a circuit breaker E is provided between the second connection point P2 and the third connection point P3. A transformer 9 is provided between the third connection point P3 and the fourth connection point P4 of the AC line 2 .

Auxiliary power supply device 20 has power storage unit 21 , power converter 22 , transformer unit 23 , and power converter 24 . The power converter 22 is connected to a fifth connection point P5 of the AC line 2, converts AC power input from the AC line 2 into DC power, and outputs the DC power to the power storage unit 21 and the transformer unit 23 side. The transformer 23 is a step-down circuit using, for example, a silicon dropper. The power converter 24 converts the DC power stepped down by the transformer 23 into desired AC power and outputs the AC power to the contact b side of the power switching device 8 .

In the auxiliary power supply device 20, DC power is supplied from the DC section between the transformer section 23 and the power converter 24 to the generator control section C2 and the circuit breaker control section C3. Even if power is no longer supplied to the AC line 2, the auxiliary power supply device 20 can supply the power stored in the power storage unit 21 to the generator control unit C2 and the circuit breaker control unit C3. In other words, the generator control unit C2 and the circuit breaker control unit C3 can continue to operate as long as power is supplied from the auxiliary power supply device 20 even if power is not supplied to the AC line 2 .
The operations of the generator control section C2 and the circuit breaker control section C3 will be described later.

The LNG satellite facility shown in FIG. 4 is provided with an uninterruptible power supply 13 . The uninterruptible power supply 13 is connected between the power switching device 8 and the vaporizing section 36 , and can store power supplied from the power switching device 8 and supply power to the vaporizing section 36 . In this case, the power switching device 8 operates to switch the power supply source for the uninterruptible power supply 13 to either the AC line 2 or the auxiliary power supply 20 . Specifically, the uninterruptible power supply 13 is connected to the contact c of the power switching device 8, and the satellite control unit C1 and the vaporizing unit 36 of the fuel gas supply unit 30 are connected to the uninterruptible power supply 13. configuration. By adopting such a configuration, for example, even if an instantaneous voltage drop occurs in the AC line 2, power is stably supplied to the satellite control unit C1 and the vaporization unit 36 via the uninterruptible power supply 13. be able to. Further, when power is not supplied to the AC line 2 from both the power system 1 and the power generator 11, that is, for example, a power failure occurs in the power system 1 and the operation of the power generator 11 is stopped. However, the satellite control unit C<b>1 and the vaporization unit 36 can operate by being supplied with power stored in the uninterruptible power supply 13 .

When such an uninterruptible power supply 13 is provided, the power switching device 8 automatically switches the power supply source for the uninterruptible power supply 13 to the AC line 2 and the auxiliary power supply 20 as described above. It may be configured to operate to switch to either one, or the power supply source for the uninterruptible power supply 13 may be the AC line 2 or the auxiliary power supply 20 in accordance with a command from another control device. It may be configured using a switch that operates to switch to either one. In the latter case, the control device monitors the power (remaining power storage amount) stored in the uninterruptible power supply 13, and if the remaining power storage amount is equal to or greater than the set value (that is, from the uninterruptible power supply 13 When power is supplied), the power supply switching device 8 is operated so that the uninterruptible power supply 13 is connected to the AC line 2, and when the remaining amount of power storage becomes less than the set value (that is, the uninterruptible power supply 13), the uninterruptible power supply 13 is connected to the auxiliary power supply 20 until the next power supply to the AC line 2 is started, and the uninterruptible power supply from the auxiliary power supply 20 It is possible to perform control to operate the power switching device 8 so as to supply power to 13 .

The heat supply unit 31 of the fuel gas supply unit 30 includes a heat medium flow path 33 in which a heat medium circulates, a heating unit 32 capable of heating the heat medium circulating in the heat medium flow path 33, and the heat medium flow path 33. and a heat exchanger 35 for exchanging heat held by the heat medium flowing through the heat medium flow path 33 and LNG flowing through the LNG flow path 6 . In this embodiment, the LNG flow path 6 is branched into two on the downstream side of the electromagnetic valve 37, and electromagnetic valves 38a, 38b and heat exchangers 35a, 35b are provided in the branched LNG flow paths 6a, 6b, respectively. It is With such a configuration, the LNG is vaporized in the heat exchanger 35, and the natural gas vaporized in the heat exchanger 35 passes through the gas flow paths 7a and 7b, and after the pressure is adjusted by the governor 39, the gas flow path 7 to the power generator 11 side.

The heating unit 32 is configured using, for example, a boiler that burns gas and uses the combustion heat to heat the heat medium flowing through the heat medium flow path 33 . The gas to be burned is, for example, natural gas branched from the gas flow path 7 . Such a boiler requires electric power to operate a fan (not shown) for supplying oxygen (air) and the like. Power is also required to operate the pump 34 for circulating the heat medium. In this embodiment, the heat supply part 31 of the fuel gas supply part 30 is connected to the seventh connection point P7 of the AC line 2, and the power supplied from the AC line 2 is used to use the heat supply part 31 (for example, the above-mentioned fan, pump 34, etc.) will operate.

The vaporization unit 36 of the fuel gas supply unit 30 includes an electromagnetic valve 37 provided in the middle of the LNG flow path 6, and an electromagnetic valve 37 provided in the middle of the LNG flow paths 6a and 6b branched downstream of the electromagnetic valve 37. 38a, 38b, and heat exchangers 35a, 35b for exchanging heat held by the heat medium flowing through the heat medium flow path 33 and LNG flowing through the LNG flow path 6 . The satellite controller C1 controls the operations of the solenoid valve 37 and the solenoid valves 38a and 38b. In other words, the vaporization section 36 of the fuel gas supply section 30 operates using electric power supplied via the power switching device 8 .

Next, referring to FIGS. 5 to 8, immediately after a power outage occurs in the power system 1, the power generation device 11 is activated, the power supply from the power system 1 is resumed, and the power generation device 11 is connected to the power system 1. An example of the operation of the LNG satellite facility until it is reconnected will be described. It should be noted that, in the drawing, a portion where electric power is supplied is drawn with a thick line, and a circuit breaker that is turned on (connected) is drawn with a thick line.

[Immediately after power outage]
FIG. 5 is a diagram showing a state immediately after a power failure occurs in the power system 1. As shown in FIG.
When a power outage occurs in the power system 1, the power generation device control unit C2 stops the power generation device 11 and causes the circuit breaker F to perform a breaking operation. For example, the occurrence of a power outage in the power system 1 can be realized using a voltage sensor that can detect the voltage of the power in the power system 1 . In this case, when the voltage on the power system 1 side of the circuit breaker A drops below a predetermined voltage, the power generator control unit C2 determines that a power failure has occurred in the power system 1 . Then, when determining that a power failure has occurred in the power system 1, the power generator control unit C2 stops its own engine 11a and power generator 11b. As a result, the power supply from both the power system 1 and the power generator 11 to the AC line 2 is stopped, but the power storage unit 21 of the auxiliary power supply 20 is supplied with power to the power generator control unit C2 and the circuit breaker control unit C3. is stored, power supply from the auxiliary power supply 20 is continued. Further, the power generator control unit C2 executes an automatic reset function to verify the operation of the engine 11a and the power generator 11b.

When a power failure occurs in the power system 1 and the voltage on the power system 1 side of the circuit breaker A drops below a predetermined voltage, the circuit breaker control unit C3 controls the circuit breaker A, the circuit breaker B, the circuit breaker C , actuates the circuit breaker D to cut off. In addition, the circuit breaker control unit C3 causes the circuit breaker E to cut off when power supply to the AC line 2 from both the power system 1 and the power generation device 11 stops. By operating each circuit breaker as described above, power is no longer supplied to the important power load 3 and the general power load 4 .

Since no power is supplied to the AC line 2, the power switching device 8 operates to conduct the contact b and the contact c. As a result, the power stored in the power storage unit 21 of the auxiliary power supply device 20 can be supplied to the satellite control unit C<b>1 and the vaporizing unit 36 . The satellite control unit C1 can supply LNG to the heat exchanger 35 by opening the electromagnetic valve 37 constituting the vaporization unit 36 and opening at least one of the electromagnetic valves 38a and 38b. Since no power is supplied to the heat supply unit 31 in this state, the heating unit 32 cannot generate new heat and the heat medium flows through the heat medium flow path 33 (that is, the heat exchanger 35 ), the heat retained by the heat exchanger 35 before the power failure occurred in the power system 1 remains. Therefore, in the heat exchanger 35, the LNG can be vaporized due to the temperature difference between the retained heat and the supplied LNG.

The heat exchanger 35 of the vaporization section 36 preferably employs a material and structure capable of retaining as much heat supplied from the heat medium flow path 33 as possible. For example, if the material constituting the heat exchanger 35 is configured to function as a heat medium capable of retaining a large amount of heat, even if new heat is no longer supplied from the heat medium flow path 33, heat is already retained. The heat generated can be used to vaporize more LNG. Specifically, even if the heat supply unit 31 cannot operate because the heat supply unit 31 cannot operate because power is not supplied from the AC line 2, the heat supply unit 31 cannot continuously supply heat to the vaporization unit 36. , a heat carrier capable of retaining heat capable of vaporizing the LNG to produce a quantity of natural gas. For example, the predetermined amount corresponds to the amount of natural gas as fuel gas consumed by the power generation device 11 from the time the power generation device 11 is activated until the power generated by the power generation device 11 can be supplied to the AC line 2 . Then, even if heat cannot be continuously supplied from the heat supply unit 31 to the vaporization unit 36, the LNG is vaporized by the heat already held by the heat medium of the vaporization unit 36, and the power generation device 11 is started. Then, the amount of natural gas consumed by the power generator 11 can be generated until the generated power can be supplied to the AC line 2 .
As described above, in the state shown in FIG. 5 , the natural gas vaporized by the heat exchanger 35 can be supplied to the power generator 11 through the gas flow path 7 .

[After starting the generator]
FIG. 6 is a diagram showing a state after the power generator 11 has started.
The power generator control unit C2 consumes the fuel gas containing the vaporized natural gas as described above, starts the operation of the engine 11a, drives the power generator 11b with the engine 11a, and starts the power generation operation of the power generator 11. to start. That is, when the power supply from the power system 1 to the AC line 2 is stopped, the power generation device 11 stops generating power, and then operates using the power supplied from the auxiliary power supply device 20 to resume power generation. It is configured. For example, after executing the automatic reset function described above, the power generator control unit C2 executes an automatic start function (blackout start function: BOS function) for starting the operation of its own engine 11a and generator 11b. After that, when the output voltage of the generator 11b reaches a predetermined voltage (for example, 6.6 kV), the power generator control unit C2 turns on the circuit breaker F, and accordingly, the voltage at the third connection point P3, for example, rises to a predetermined voltage ( 6.6 kV, for example), the circuit breaker controller C3 closes the circuit breaker E. In addition, the circuit breaker controller C3 closes the circuit breaker C. As a result, the power supply from the generator 11 to the AC line 2 is resumed, and power is also supplied to the important power load 3, although the power system 1 is in a power outage. In addition, electric power is supplied from the AC line 2 to power generator auxiliary machines 12 such as pumps and fans used in the power generator 11 .

Since power is supplied to the AC line 2, the power switching device 8 operates to conduct the contact a and the contact c. As a result, power can be supplied from the AC line 2 to the satellite control unit C1 and the vaporization unit 36 . Electric power can also be supplied from the AC line 2 to the heat supply section 31 of the fuel gas supply section 30 . The heat supply unit 31 is configured to resume operation when power supply to the AC line 2 is resumed. In this embodiment, the satellite control unit C1 operates the heating unit 32 and the pump 34 of the heat supply unit 31 using the power supplied from the AC line 2 to transfer heat from the heat supply unit 31 to the vaporization unit 36. Start supplying. For example, the heating unit 32 of the heat supply unit 31 performs an automatic reset function to verify its own operation when power supply to the AC line 2 (that is, power supply to itself) is restarted. It should be noted that the automatic reset function cannot be normally executed when the pressure of the combustion gas supplied to the heating unit 32 is low, or when the intake filter for the combustion air is clogged. There is also Then, the heating unit 32 of the heat supply unit 31 restarts the heating operation for the heat medium circulating in the heat medium flow path 33 after the automatic reset function can be normally executed. Also, the pump 34 starts operating. As a result, the LNG is vaporized in the vaporization section 36 using the heat continuously supplied from the heat supply section 31 .

[Immediately after the power system has been restored]
FIG. 7 is a diagram showing a state after power supply from the power system 1 is restarted.
When the power supply from the power system 1 is restarted and the voltage on the power system 1 side of the circuit breaker A becomes equal to or higher than a predetermined voltage (that is, when the power is restored), the power generator control unit C2 controls the circuit breaker A and turn on circuit breaker D. As a result, power is supplied from the power system 1 to the general power load 4 .
At this time, the power generator 11 is not connected to the electric power system 1 because the circuit breaker B is in the interrupting operation.

[After grid connection]
FIG. 8 is a diagram showing a state in which the power generation device 11 is reconnected to the power grid 1. As shown in FIG.
The power generation device control unit C2 controls the operation of the power generation device 11 so that the power is synchronized between the primary side (power system 1 side) and the secondary side (power generation device 11 side) of the circuit breaker B, and An instruction to close the circuit breaker B is issued to the circuit breaker control unit C3. Then, the circuit breaker control unit C3 turns on the circuit breaker B, so that the power generator 11 and the electric power system 1 are interconnected.

<Second embodiment>
The LNG satellite facility of the second embodiment differs from that of the first embodiment in that a boil-off gas supply section 41 and a fuel gas storage section 50 are provided. The LNG satellite facility of the second embodiment will be described below, but the description of the same configuration as in the first embodiment will be omitted.

FIG. 9 is a diagram illustrating a schematic configuration of the LNG satellite facility of the second embodiment. As illustrated, the fuel gas supply unit 30 has a boil-off gas supply unit 41 that supplies boil-off gas (BOG) generated in the LNG storage tank 5 to the power generator 11 as fuel gas. The boil-off gas supply unit 41 is connected to the contact point c of the power switching device 8 in the same manner as the vaporization unit 36, and receives power supply from the AC line 2 or the auxiliary power supply device 20 via the power switching device 8. can be done. That is, when power is supplied to the AC line 2 from at least one of the power system 1 and the power generation device 11, the power switching device 8 of the present embodiment vaporizes the power supplied from the AC line 2 as the power supply source. 36 and the boil-off gas supply unit 41, and when power is not supplied to the AC line 2 from both the power system 1 and the power generation device 11, the power supplied from the auxiliary power supply device 20 as the power supply source is vaporized. It is configured to supply the section 36 and the boil-off gas supply section 41 .

In addition, the LNG satellite facility of the present embodiment has a storage space that can temporarily store fuel gas in the middle of the gas flow path 7 through which the fuel gas supplied from the fuel gas supply unit 30 to the power generation device 11 passes. and a fuel gas reservoir 50 having a

FIG. 10 is a diagram showing a configuration example of the fuel gas supply unit 30. As shown in FIG. The LNG satellite facility includes the boil-off gas supply unit 41 so that the boil-off gas existing inside the LNG storage tank 5 can be supplied to the power generator 11 via the boil-off gas flow path 40 . As illustrated, the boil-off gas supply unit 41 has a BOG heater 42 , an electromagnetic valve 43 and a governor 44 . The BOG heater 42 is a device that heats the boil-off gas that has been present inside the LNG storage tank 5 and is supplied through the boil-off gas flow path 40, for example, by the heat of the atmosphere. The operation of the solenoid valve 43 is controlled by the satellite control section C1 shown in FIG. With such a configuration, the heated boil-off gas is supplied downstream from the boil-off gas supply unit 41, and after the pressure is adjusted by the governor 44, passes through the gas flow path 7 to the power generation device 11 side. supplied to

For example, the set pressure of the governor 44 of the boil-off gas supply section 41 is set higher than the set pressure of the governor 39 that adjusts the pressure of the gas vaporized by the vaporization section 36 . Therefore, when the fuel gas can be supplied to the power generation device 11 from both the boil-off gas supply unit 41 and the vaporization unit 36, the fuel gas supply from the boil-off gas supply unit 41 to the power generation device 11 takes precedence. is done.

Thus, when the fuel gas supply unit 30 has the boil-off gas supply unit 41, even if the amount of gas that can be supplied from the vaporization unit 36 to the power generation device 11 is small, the gas supplied from the boil-off gas supply unit 41 , can cover at least part of the amount of fuel gas required by the power generation device 11 .

In addition, since the LNG satellite facility is provided with the fuel gas storage section 50 in the middle of the gas flow path 7, even if the amount of natural gas vaporized in the vaporization section 36 is small, the fuel gas storage section 50 supplies a sufficient amount of gas to the power generation device 11. Amount of fuel gas can be supplied. Further, even if the amount of gas supplied from the fuel gas supply unit 30 per unit time fluctuates, the fluctuation is mitigated by the fuel gas storage unit 50 and is less likely to be transmitted to the power generator 11 . The capacity of the storage space in which the fuel gas can be temporarily stored in the fuel gas storage unit 50 can be appropriately set.

In this embodiment as well, immediately after a power failure occurs in the power system 1, the satellite control unit C1 opens the electromagnetic valve 37 constituting the vaporization unit 36 and opens at least one of the electromagnetic valves 38a and 38b. Thereby, LNG can be supplied to the heat exchanger 35 that constitutes the vaporization section 36 , and the natural gas vaporized by the heat exchanger 35 can be supplied to the power generation device 11 via the gas flow path 7 . In addition, immediately after a power failure occurs in the power system 1, the satellite control unit C1 opens the solenoid valve 43 of the boil-off gas supply unit 41. Thereby, the boil-off gas existing inside the LNG storage tank 5 flows out to the boil-off gas flow path 40 . The boil-off gas is heated by the BOG heater 42 , and after the pressure is adjusted by the governor 44 , joins the gas flow path 7 . Note that the satellite control unit C1 may limit the period during which the electromagnetic valve 43 of the boil-off gas supply unit 41 is opened immediately after a power failure occurs in the power system 1 to only a predetermined period.

<Third Embodiment>
The LNG satellite facility of the third embodiment differs from the above embodiments in the form of power supply to the vaporization section 36 . The LNG satellite facility of the third embodiment will be described below, but the description of the same configuration as in the above embodiment will be omitted.

FIG. 11 is a diagram illustrating a schematic configuration of the LNG satellite facility of the third embodiment. As illustrated, the LNG satellite facility includes a fuel gas supply unit 30 that supplies fuel gas including natural gas obtained by vaporizing LNG to the power generation device 11, and consumes the fuel gas supplied from the fuel gas supply unit 30. and an AC line 2 to which power is supplied from at least one of the power system 1 and the power generation device 11 .
Unlike the above embodiment, the LNG satellite facility of this embodiment is not provided with the power switching device 8 .

In addition, the LNG satellite facility has a power storage unit 21 connected to the AC line 2, stores the power supplied to the AC line 2 in the power storage unit 21, and generates power for starting the power generation device 11. An auxiliary power supply 20 that can supply power to the device 11, and an uninterruptible power supply that is connected to the AC line 2 and the auxiliary power supply 20 and can receive power from at least one of the AC line 2 and the auxiliary power supply 20. 14. The uninterruptible power supply 14 has a storage unit (not shown) capable of storing power supplied from the AC line 2 and power supplied from the auxiliary power supply 20 . The heat supply unit 31 of the fuel gas supply unit 30 is configured to receive power from the AC line 2 to operate, and the vaporization unit 36 is configured to receive power from the uninterruptible power supply 14 to operate.

Even in the LNG satellite facility of the third embodiment, when power is supplied to the AC line 2 from at least one of the power system 1 and the power generation device 11, the heat supply unit 31 of the fuel gas supply unit 30 is supplied with power from the AC line 2. is supplied. In addition, since power is also supplied from the AC line 2 to the uninterruptible power supply 14 , power is continuously supplied from the uninterruptible power supply 14 to the vaporizing section 36 of the fuel gas supply section 30 . That is, the vaporization section 36 of the fuel gas supply section 30 can continuously vaporize LNG using the heat supplied from the heat supply section 31 . As a result, the power generator 11 can continue to operate by consuming the fuel gas continuously supplied from the fuel gas supply unit 30 .

Even if power is not supplied to the AC line 2 from both the power system 1 and the power generator 11, that is, even in a situation where, for example, a power failure occurs in the power system 1 and the operation of the power generator 11 is stopped. , the vaporization unit 36 can operate by being supplied with electric power stored in the uninterruptible power supply 14 . Furthermore, since power is also supplied from the auxiliary power supply 20 to the uninterruptible power supply 14 , power is continuously supplied from the uninterruptible power supply 14 to the vaporizing section 36 . Therefore, even if heat cannot be continuously supplied from the heat supply unit 31 to the vaporization unit 36 because the heat supply unit 31 cannot operate because power is not supplied from the AC line 2, the heat held by the vaporization unit 36 is As long as there is a temperature difference between LNG and LNG, fuel gas containing natural gas obtained by vaporizing LNG is supplied to the power generator 11 . As a result, the power generation device 11 consumes the fuel gas supplied from the fuel gas supply unit 30 and operates even in a situation where a power failure or the like occurs in the power system 1 and the operation of the power generation device 11 is stopped. and continue its operation, even temporarily.

As described above, even in a situation where a power failure or the like occurs in the power system 1 and the operation of the power generation device 11 is stopped, the operation of the power generation device 11 is started and the operation is continued even temporarily. By doing so, a situation is created in which power is supplied from the power generator 11 to the AC line 2 . As a result, since power is supplied from the AC line 2 to the heat supply section 31 of the fuel gas supply section 30, heat is continuously supplied from the heat supply section 31 to the vaporization section 36 in the fuel gas supply section 30, In addition, the supplied heat is used to continuously vaporize the LNG in the vaporizer 36 . Since fuel gas is continuously supplied from the fuel gas supply unit 30 to the power generation device 11 , the power generation device 11 can continue to operate and supply power to the AC line 2 .

Although not shown, the fuel gas supply unit 30 supplies the boil-off gas generated in the LNG storage tank 5 to the power generation device 11 as fuel gas in the same manner as described in the second embodiment. 41. In that case, the boil-off gas supply unit 41 may be configured to operate by being supplied with power through the uninterruptible power supply 14 .
In addition, the LNG satellite facility has a storage space in which the fuel gas can be temporarily stored in the middle of the gas flow path 7 through which the fuel gas supplied from the fuel gas supply unit 30 to the power generation device 11 passes. A portion 50 may be provided.

<Another embodiment>
<1>
In the above embodiment, the LNG satellite facility of the present invention has been described with a specific example, but the configuration can be changed as appropriate.
For example, in the above-described embodiment, the power generator 11 can be of various types, such as a turbine that rotates with combustion gas generated by burning fuel gas, and a generator 11b that is driven by the turbine. realizable.

<2>
In the above embodiment, an example in which the vaporization section 36 includes two heat exchangers 35 has been described, but the number of heat exchangers 35 provided in the vaporization section 36 can be set as appropriate. However, in the state immediately after a power failure in the electric power system 1 as shown in FIG. Preferably, vaporization of the LNG is performed at .

<3>
In the above embodiment, an example in which the satellite control unit C1, the power generation device control unit C2, and the circuit breaker control unit C3 are provided in the LNG satellite facility has been described. It is possible to set as appropriate what kind of function the unit is responsible for. Further, in the LNG satellite facility, the satellite control unit C1, the power generation device control unit C2, and the circuit breaker control unit C3 may automatically perform the control as described above, or according to a command from the operator of the LNG satellite facility. you can go

<4>
The configurations disclosed in the above embodiments (including other embodiments) can be applied in combination with configurations disclosed in other embodiments unless there is a contradiction. The described embodiment is an example, and the embodiment of the present invention is not limited to this, and can be modified as appropriate without departing from the object of the present invention.

INDUSTRIAL APPLICABILITY The present invention can be used for LNG satellite equipment that can start and continue the operation of a power generation device even if the power supply from the power system is stopped for a long time.

1 Power system 2 AC line 5 LNG storage tank 7 Gas flow path 8 Power supply switching device 11 Power generation device 13 Uninterruptible power supply 14 Uninterruptible power supply 20 Auxiliary power supply 21 Power storage unit 30 Fuel gas supply unit 31 Heat supply unit 36 Vaporization unit 41 Boil-off gas supply unit 50 Fuel gas storage unit

Claims (8)

A fuel gas supply unit that supplies fuel gas containing natural gas obtained by vaporizing LNG to a power generation device, the power generation device that consumes the fuel gas supplied from the fuel gas supply unit to generate power, and a power system and an AC line to which power is supplied from at least one of the power generators,
An auxiliary power supply device having an electricity storage unit connected to the AC line, capable of storing electric power supplied to the AC line in the electricity storage unit, and supplying electric power for starting the power generation device to the power generation device. prepared,
The fuel gas supply unit has a vaporization unit that retains the supplied heat and vaporizes the LNG by a temperature difference between the retained heat and the LNG, and a heat supply unit that supplies heat to the vaporization unit. the heat supply unit is configured to operate by receiving power supply from the AC line, and the vaporization unit is configured to operate by receiving power supply from a power switching device connected to a plurality of power supply sources,
When power is supplied to the AC line from at least one of the electric power system and the power generation device, the power switching device supplies the power supplied from the AC line as the power supply source to the vaporizing unit. and, when power is not supplied to the AC line from both the electric power system and the power generation device, power supplied from the auxiliary power supply device as the power supply source is supplied to the vaporization unit. LNG satellite facility. The fuel gas supply unit has a boil-off gas supply unit that supplies the boil-off gas generated in the LNG storage tank as the fuel gas to the power generation device,
The boil-off gas supply unit is configured to operate by being supplied with power from the power switching device, and the power switching device receives power from at least one of the power system and the power generation device to the AC line. power supplied from the AC line as the power supply source is supplied to the vaporization unit and the boil-off gas supply unit, and power is supplied to the AC line from both the power system and the power generation device. 2. The LNG satellite facility according to claim 1, wherein the LNG satellite facility is configured to supply power supplied from the auxiliary power supply as the power supply source to the vaporization unit and the boil-off gas supply unit when there is no power supply. A fuel gas supply unit that supplies fuel gas containing natural gas obtained by vaporizing LNG to a power generation device, the power generation device that consumes the fuel gas supplied from the fuel gas supply unit to generate power, and a power system and an AC line to which power is supplied from at least one of the power generators,
an auxiliary power supply device having a power storage unit connected to the AC line, capable of storing power supplied to the AC line in the power storage unit, and supplying power for activating the power generation device to the power generation device; ,
An uninterruptible power supply connected to the AC line and the auxiliary power supply and capable of receiving power supply from at least one of the AC line and the auxiliary power supply,
The fuel gas supply unit has a vaporization unit that retains the supplied heat and vaporizes the LNG by a temperature difference between the retained heat and the LNG, and a heat supply unit that supplies heat to the vaporization unit. The LNG satellite facility is configured such that the heat supply section operates by receiving power supply from the AC line, and the vaporization section operates by receiving power supply through the uninterruptible power supply. The fuel gas supply unit has a boil-off gas supply unit that supplies the boil-off gas generated in the LNG storage tank as the fuel gas to the power generation device,
4. The LNG satellite facility according to claim 3, wherein said boil-off gas supply unit is configured to operate by being supplied with power through said uninterruptible power supply. The power generation device is configured to stop power generation when power supply from the power system to the AC line is stopped, and then restart power generation by operating using power supplied from the auxiliary power supply device. LNG satellite facility according to any one of claims 1 to 4. A fuel gas storage part having a storage space for temporarily storing fuel gas is provided in the middle of a gas flow path through which fuel gas supplied from the fuel gas supply part to the power generation device passes. LNG satellite facility according to any one of the preceding clauses. The LNG satellite facility according to any one of claims 1 to 6, wherein the heat supply unit is configured to resume operation when power supply to the AC line is resumed. The vaporization unit vaporizes LNG even when heat cannot be continuously supplied from the heat supply unit to the vaporization unit because the heat supply unit cannot operate due to the power not being supplied from the AC line. configured to have a heat carrier capable of retaining heat capable of producing a predetermined amount of natural gas through
3. The predetermined amount corresponds to the amount of natural gas as the fuel gas consumed by the power generation device from the time the power generation device is activated until the power generated by the power generation device can be supplied to the AC line. LNG satellite facility according to any one of 1 to 7.

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