Emergency power supply system, control device, and emergency power supply control method

Abstract

To provide an emergency power supply system that improves the power generation efficiency of power generation facilities. [Solution] The emergency power supply system 1 comprises a power receiving facility 40, a first power generation facility 10, a second power generation facility 20, and a control device 50. The power receiving facility 40 receives power from the power grid. The first power generation facility 10 generates electricity using fuel. The second power generation facility 20 generates electricity using renewable energy. The control device 50 controls the first power generation facility 10 and the second power generation facility 20. When the power grid is in a power outage state and power needs to be supplied to the load, the control device 50 causes the first power generation facility 10 to supply power to the load before causing the second power generation facility 20 to supply power to the load.

Description

Technical Field

[0001] The present disclosure relates to an emergency power supply system, a control device, and an emergency power supply control method, and particularly to an emergency power supply system including a plurality of power generation facilities, a control device for controlling the plurality of power generation facilities, and an emergency power supply control method.

Background Art

[0002] Patent Document 1 discloses an external power supply device and an internal power supply device connected to a commercial power supply system (power grid). The external power supply device and the internal power supply device are operated during a power outage of the commercial power supply system and supply power to a load. The external power supply device and the internal power supply device include a plurality of power supply devices such as, for example, a solar power generation device and a fuel cell.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Generally, in a power supply device including a plurality of power generation facilities, power from a power generation facility that generates power using natural energy such as a solar power generation device is often preferentially supplied to a load over power from a power generation facility that generates power using fuel. However, in a power generation facility that generates power using fuel, there may be cases where the generated power is too small relative to the capacity of the power generation facility, cases where the power generation efficiency decreases, or cases where a malfunction occurs in the power generation facility.

[0005] An object of the present disclosure is to provide an emergency power supply system, a control device, and an emergency power supply control method that improve the power generation efficiency of a power generation facility.

Means for Solving the Problems

[0006] An emergency power supply system according to one aspect of the present disclosure comprises a power receiving unit, a first power generation unit, a second power generation unit, and a control device. The power receiving unit receives power from the power grid. The first power generation unit generates electricity using fuel. The second power generation unit generates electricity using renewable energy. The control device controls the first and second power generation units. When the power grid is in a power outage state and power is to be supplied to a load, the control device causes the first power generation unit to supply power to the load before causing the second power generation unit to supply power to the load.

[0007] A control device according to one aspect of the present disclosure controls a first power generation facility and a second power generation facility. The first power generation facility generates electricity using fuel. The second power generation facility generates electricity using renewable energy. When the power grid is in a power outage state and power is to be supplied to a load, the control device causes the first power generation facility to supply power to the load before causing the second power generation facility to supply power to the load.

[0008] An emergency power supply control method according to one aspect of the present disclosure is executed by one or more processors. The emergency power supply control method controls a first power generation facility that generates electricity using fuel and a second power generation facility that generates electricity using renewable energy. The emergency power supply control method includes a control step. In the control step, when supplying power to a load when the power system is in a power outage state, the first power generation facility is made to supply power to the load before the second power generation facility is made to supply power to the load. [Effects of the Invention]

[0009] According to one aspect of the present disclosure, an emergency power supply system, a control device, and an emergency power supply control method make it possible to improve the power generation efficiency of a power generation facility. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a block diagram of an emergency power supply system according to an embodiment. [Figure 2]Figure 2 is a schematic diagram of the power distribution route, including the emergency power supply system mentioned above. [Figure 3] Figure 3 is a flowchart showing the operation of the emergency power supply system described above. [Figure 4] Figure 4 is a graph showing the power consumption in the same emergency power supply system. [Figure 5] Figure 5 is another graph showing the power consumption in the same emergency power supply system. [Figure 6] Figure 6 is a schematic diagram of the power distribution route configuration including the emergency power supply system according to Modification Example 3. [Modes for carrying out the invention]

[0011] An emergency power supply system and a control method for the emergency power supply system according to an embodiment will be described with reference to the drawings.

[0012] (Embodiment) (1) Overview An overview of the emergency power supply system 1 according to this embodiment will be described with reference to Figures 1 and 2.

[0013] The emergency power supply system 1 according to this embodiment controls the power distribution equipment so that power supplied from the power grid 90 is supplied to the load 80 installed within the facility, as shown in Figure 2, for example. Furthermore, if the power supplied from the power grid 90 is in a power outage state, the emergency power supply system 1 controls the first power generation equipment 10, the second power generation equipment 20, and the energy storage equipment 30, respectively, to supply power to the load 80 from at least one of the first power generation equipment 10, the second power generation equipment 20, and the energy storage equipment 30. The power grid 90 is, for example, a commercial power source.

[0014] The facilities include, for example, non-residential facilities such as commercial buildings, office buildings, shops, hospitals, and schools, or residential facilities such as apartment buildings.

[0015] (2) Composition As shown in FIG. 1, the emergency power supply system 1 according to the embodiment includes a first power generation facility 10, a second power generation facility 20, a power storage facility 30, a power receiving facility 40, and a control device 50. The emergency power supply system 1 includes, for example, a control device 50. The emergency power supply system 1 further includes a power failure detection unit 60 and a fire detection facility 70.

[0016] (2.1) First power generation facility The first power generation facility 10 is a power generation facility that generates power using fuel. The first power generation facility 10 includes, for example, an internal combustion engine. The first power generation facility 10 includes, for example, a diesel generator and a gas turbine generator. In the present embodiment, the first power generation facility 10 includes a diesel generator.

[0017] The first power generation facility 10 supplies power to the load 80, for example, when the power system 90 is in a power failure state. The first power generation facility 10 is controlled by the control device 50 so that the generated power becomes equal to or greater than a first threshold value Th1 (see FIG. 4). The generated power of the first power generation facility 10 refers to the instantaneous value of the power generated by the first power generation facility 10. The power generated by the first power generation facility 10 is, for example, the apparent power output from the first power generation facility 10. The first threshold value Th1 is the minimum generated power of the first power generation facility 10 for maintaining the power generation efficiency of the first power generation facility 10 above a certain standard, and is, for example, 30% of the capacity of the first power generation facility 10. By setting the generated power of the first power generation facility 10 to be equal to or greater than the first threshold value Th1, it becomes possible to reduce the power generation efficiency.

[0018] In the present embodiment, since the first power generation facility 10 is a diesel generator, when the generated power is less than the first threshold value Th1, incomplete combustion may occur in the internal combustion engine and soot may be generated. Therefore, by setting the generated power of the first power generation facility 10 to be equal to or greater than the first threshold value Th1, it becomes less likely that the first power generation facility 10 will malfunction due to soot.

[0019] (2.2) Second power generation facility The second power generation facility 20 is a power generation facility that generates electricity using natural energy. The second power generation facility 20 includes, for example, a solar power generation facility that generates electricity using sunlight and a wind power generation facility that generates electricity using wind power. In the present embodiment, the second power generation facility 20 includes a solar power generation facility.

[0020] In the present embodiment, as shown in FIG. 2, the second power generation facility 20 includes a solar panel 21 and a power conditioner 22. The solar panel 21 outputs DC power generated by receiving light. The power conditioner 22 is an inverter that converts the DC power received from the solar panel 21 into AC power. When the power grid 90 is not powered off, the power conditioner 22 operates in connection with the power grid 90. When the power grid 90 is powered off, the power conditioner 22 outputs power or stops operating as will be described later. When the power conditioner 22 is in a stopped state, even if an electromotive force is generated in the solar panel 21, no power is output from the second power generation facility 20.

[0021] (2.3) Energy storage device The energy storage device 30 is a device that charges and discharges electricity. The energy storage device 30 performs a charging operation using, for example, a part or all of the power supplied from the second power generation facility 20. Further, the energy storage device 30 supplies power to the load 80, for example, by a discharging operation. The energy storage device 30 includes, for example, a storage battery 31 and a power conditioner 32, as shown in FIG. 2.

[0022] The storage battery 31 is, for example, a secondary battery such as a lithium-ion battery, a sodium-sulfur battery, a nickel-metal hydride battery, or a lead-acid battery.

[0023] The power conditioner 32 has the function of an inverter that converts the DC power output by the battery 31 into AC power, and a charging function that converts the AC power received from the second power generation equipment 20 into DC power to charge the battery 31. When the power grid 90 is not experiencing a power outage, the power conditioner 32 either operates by being connected to the power grid 90 or charges the battery 31 with power received from the power grid 90. When the power grid 90 is experiencing a power outage, the power conditioner 32 either outputs power, charges the battery 31 with power received from the second power generation equipment 20, or stops, as will be described later. When the power conditioner 32 is stopped, the energy storage equipment 30 does not perform either discharge or storage.

[0024] (2.4) Power receiving equipment The power receiving equipment 40 is equipment that receives power from the power grid 90. As shown in Figure 2, the power receiving equipment 40 includes a plurality of transformers 41 and a plurality of power receiving circuits 42.

[0025] The multiple power receiving lines 42 are high-voltage service lines that bring power from the power system 90 to the facility. The power receiving lines 42 are, for example, three-phase three-wire AC circuits with an effective voltage of 6600V.

[0026] Each of the multiple transformers 41 converts the AC power received from the power system 90 via the corresponding power receiving circuit 42 among the multiple power receiving circuits 42 into a voltage suitable for supply to the load 80. Each of the multiple transformers 41 is, for example, a cubicle installed in the facility. Each of the multiple transformers 41 transforms, for example, three-phase AC with an effective voltage of 6600V into single-phase AC with effective voltages of 100V and 200V.

[0027] (2.5) Power outage detection unit The power outage detection unit 60 is equipment that detects whether or not the power system 90 is in a power outage state. The power outage detection unit 60 is located, for example, between the power receiving equipment 40 and the power system 90 as shown in Figure 2. The power outage detection unit 60 measures the voltage of the power system 90 and transmits information based on the measured voltage to the control device 50.

[0028] (2.6) Fire detection equipment The fire detection system 70 is equipment that monitors the status of fires in a facility. The fire detection system 70 includes, for example, multiple fire detectors such as smoke detectors and heat detectors, and a control panel. Multiple fire detectors are installed in multiple locations within the facility, and each of the multiple fire detectors detects a fire when it occurs within its monitoring range and notifies the control panel. When the fire detector detects a fire, the control panel transmits information indicating that a fire has occurred to the control device 50.

[0029] (2.7) Control device The control device 50 determines whether the power system 90 is in a power outage state and controls the first power generation equipment 10, the second power generation equipment 20, the energy storage equipment 30, and the power distribution equipment based on the determination result. Specifically, when the power system 90 is in a power outage state and power is to be supplied to the load 80, the control device 50 always puts the first power generation equipment 10 into an operational state.

[0030] When the power grid 90 is in a power outage state, the control device 50 operates the first power generation equipment 10 so that the power generated by the first power generation equipment 10 15 is equal to or greater than the first threshold Th1, as shown in Figure 4. Furthermore, when the power grid 90 is in a power outage state and the power consumption 85 of the load 80 is equal to or greater than the second threshold Th2 (see Figure 4), the control device 50 causes both the first power generation equipment 10 and the second power generation equipment 20 to supply power to the load 80. The second threshold Th2 is a value greater than the first threshold Th1, for example, 50% of the capacity of the first power generation equipment 10. In this way, when the power consumption of the load 80 is equal to or greater than the second threshold Th2, the control device 50 supplies power to the load 80 from the second power generation equipment 20 as well, thereby reducing the increased fuel consumption caused by the high power generated by the first power generation equipment 10. Thus, it is possible to achieve both a reduction in the decrease in the power generation efficiency of the first power generation equipment 10 and fuel savings for the first power generation equipment 10.

[0031] Furthermore, the control device 50 monitors the fire status using the fire detection equipment 70. If a fire occurs while the power grid 90 is in a power outage state, it supplies power from the first power generation equipment 10 to the disaster prevention load 82 of the load 80, and stops the power output from the second power generation equipment 20 and the energy storage equipment 30, as well as the power supply to the safety loads 83 and 84 of the load 80. Details of the disaster prevention load 82, safety load 83, and safety load 84 will be described later.

[0032] The control device 50 includes, for example, a computer system. The computer system has, for example, a processor and memory. The computer system realizes the functions of the control device 50 by executing a program stored in memory using the processor. The control device 50 is implemented, for example, as a control device that is a server device. In addition, part or all of the control device 50 may be implemented by cloud computing.

[0033] (3) Equipment connected to the emergency power supply system (3.1) Load Load 80 is equipment installed in the facility and operates using electricity.

[0034] As shown in Figure 2, the load 80 includes multiple general loads 81, multiple (only one shown in Figure 2) disaster prevention loads 82, and multiple (two in Figure 2) security loads 83, 84.

[0035] Each of the multiple disaster prevention loads 82 is a load that operates in the event of an emergency such as a fire. Specifically, each of the multiple disaster prevention loads 82 is a fire extinguishing device as defined by the Fire Service Act, or a power supply device for operating a fire extinguishing device. The multiple disaster prevention loads 82 include, for example, fire pumps, sprinkler systems, emergency lights, smoke exhaust systems, and emergency outlets.

[0036] Each of the multiple safety loads 83 and 84 is a load that requires power supply even when the power system 90 is in a power outage state, and does not fall under the category of disaster prevention load 82. Specifically, each of the multiple safety loads 83 and 84 is a load defined by the Building Standards Act. The multiple safety loads 83 and 84 include, for example, elevators, communication equipment in public facilities, relay equipment for broadcasting or public wireless communication, life-saving equipment in hospitals, and refrigeration and freezing equipment in stores. In addition, the multiple safety loads 83 and 84 include, for example, lighting fixtures and some air conditioning equipment.

[0037] The multiple general loads 81 are loads that do not fall under the category of disaster prevention loads or safety loads. Specifically, the multiple general loads 81 include, for example, some lighting fixtures, some air conditioning equipment, and household appliances. As shown in Figure 2, the multiple general loads 81 are not supplied with power while the power system 90 is in a power outage state.

[0038] (3.2) Power distribution equipment As shown in Figure 2, the power distribution equipment includes multiple branch lines 43, a disaster prevention line 44, a first power generation equipment line 45, a power supply changeover switch 46, fire-fighting shutoff switches 47 and 49, and a shutoff switch 48.

[0039] The multiple branch circuits 43 are circuits that supply power from the power receiving equipment 40 to the load 80. The multiple branch circuits 43 are, for example, single-phase three-wire AC circuits with effective voltages of 100V and 200V.

[0040] The disaster prevention circuit 44 is a circuit for supplying power to multiple disaster prevention loads 82. The disaster prevention circuit 44 is, for example, a single-phase three-wire AC circuit with effective voltages of 100V and 200V.

[0041] The first power generation equipment circuit 45 is a circuit for supplying power from the first power generation equipment 10 to multiple disaster prevention loads 82 and multiple safety loads 83 and 84. The first power generation equipment circuit 45 is, for example, a single-phase three-wire AC circuit with effective voltages of 100V and 200V.

[0042] The power supply changeover switch 46 switches the connection destination of the multiple disaster prevention loads 82 and multiple safety loads 83, 84 to either the power grid 90 or the first power generation equipment 10. The power supply changeover switch 46 has selection terminals 461, 462 and a common terminal 463. Selection terminal 461 is connected to the power receiving equipment 40. Selection terminal 462 is connected to the first power generation equipment 10. Common terminal 463 is connected to the disaster prevention circuit 44.

[0043] The power supply changeover switch 46 is controlled by the control device 50. When the power system 90 is not experiencing a power outage, the control device 50 connects the selection terminal 461 and the common terminal 463. As a result, when the power system 90 is not experiencing a power outage, power is supplied from the power system 90 to the multiple disaster prevention loads 82 and the multiple safety loads 83 and 84. On the other hand, when the power system 90 is experiencing a power outage, the control device 50 connects the selection terminal 462 and the common terminal 463. As a result, when the power system 90 is experiencing a power outage, power is supplied from the first power generation equipment 10 to the multiple disaster prevention loads 82 and the multiple safety loads 83 and 84.

[0044] The fire-fighting shutoff switch 47 is located between the fire-fighting circuit 44 and the second power generation equipment 20 and the energy storage equipment 30. The fire-fighting shutoff switch 47 has terminals 471 and 472. Terminal 471 is connected to the second power generation equipment 20 and the energy storage equipment 30. Terminal 472 is connected to the fire-fighting circuit 44.

[0045] The fire-triggered shutoff switch 47 is controlled by the control device 50. If no fire occurs, the control device 50 switches the fire-triggered shutoff switch 47 to the closed state. As a result, when no fire occurs, power from the power grid 90 and power from the second power generation facility 20 and the energy storage facility 30, which are connected to the power grid 90, are supplied to both the multiple disaster prevention loads 82 and the multiple safety loads 83 and 84. On the other hand, if the power grid 90 is in a power outage state and a fire has occurred, the control device 50 switches the fire-triggered shutoff switch 47 to the open state. As a result, when the power grid 90 is in a power outage state and a fire has occurred, the power generated by the first power generation facility 10 supplies power to the multiple disaster prevention loads 82, and the second power generation facility 20 and the energy storage facility 30 are disconnected.

[0046] The fire-fighting shutoff switch 49 is located between the fire-fighting circuit 44 and the safety load 83. The fire-fighting shutoff switch 49 has terminals 491 and 492. Terminal 491 is connected to the fire-fighting circuit 44. Terminal 492 is connected to the safety load 83.

[0047] The fire-triggered shutoff switch 49 is controlled by the control device 50. If no fire has occurred, the control device 50 switches the fire-triggered shutoff switch 49 to the closed state. As a result, power is supplied to the safety load 83 when no fire has occurred. On the other hand, if the power system 90 is in a power outage state and a fire has occurred, the control device 50 switches the fire-triggered shutoff switch 49 to the open state. As a result, when the power system 90 is in a power outage state and a fire has occurred, the power supply to the safety load 83 is stopped, and it is possible to maintain a state in which the power generated by the first power generation equipment 10 supplies power to the multiple disaster prevention loads 82 for a long period of time.

[0048] The trip switch 48 is located between the disaster prevention circuit 44 and the safety load 84. The trip switch 48 has terminals 481 and 482. Terminal 481 is connected to the disaster prevention circuit 44. Terminal 482 is connected to the safety load 84.

[0049] The circuit breaker switch 48 is controlled by the control device 50. The control device 50 switches the circuit breaker switch 48 to the open state when the power system 90 is in a power outage state and a fire has occurred. As a result, when the power system 90 is in a power outage state and a fire has occurred, the power supply to the safety load 84 is stopped, and it is possible to maintain a state in which the power generated by the first power generation equipment 10 supplies power to the multiple disaster prevention loads 82 for a long period of time.

[0050] In other words, if the power grid 90 is in a power outage state and a fire has occurred, the power supply to the safety loads 83 and 84 is stopped by the fire shutoff switch 49 and the shutoff switch 48. To put it another way, if the power grid 90 is in a power outage state and a fire has occurred, the emergency power supply system 1 switches to a disaster prevention mode in which the first power generation equipment 10, which is an emergency power supply under the Fire Service Act, supplies power to the multiple disaster prevention loads 82 so that they can operate properly. In disaster prevention mode, power is reliably supplied to the multiple disaster prevention loads 82 related to firefighting for a minimum operating time or longer.

[0051] Furthermore, the control device 50 also switches the cutoff switch 48 to the open state when the power system 90 is in a power outage state and the power consumption of the load 80 is high (specifically, it is above the third threshold Th3 described later). This stops the power supply to the safety load 84, thereby reducing the possibility of affecting the disaster prevention mode operation of the emergency power supply system 1 if a fire occurs thereafter. If none of the above conditions apply, the control device 50 switches the cutoff switch 48 to the closed state.

[0052] (4) Operation (4.1) Operation in the event of a power outage Figure 3 is a flowchart illustrating the operation of the emergency power supply system 1 according to the embodiment. Figure 4 is a graph showing the power changes during a power outage in the power grid 90. Here, the vertical axis of Figure 4 is shown as a relative value with the capacity of the first power generation equipment 10 set to 100%.

[0053] The control device 50 of the emergency power supply system 1 determines whether or not the power system 90 is experiencing a power outage (step ST1). The control device 50 obtains information from, for example, the power receiving equipment 40 indicating whether or not the power system 90 is experiencing a power outage.

[0054] If the power grid 90 is not experiencing a power outage (No in step ST1), the control device 50 of the emergency power supply system 1 operates the second power generation equipment 20 and the energy storage equipment 30 in grid-connected mode (step ST2). The control device 50, for example, causes the power conditioner 22 of the second power generation equipment 20 to output an AC voltage synchronized with the voltage of the power grid 90. The control device 50 also, for example, causes the power conditioner 32 to charge the battery 31 of the energy storage equipment 30 if the charge level of the energy storage equipment 30 is low. A low charge level of the energy storage equipment 30 refers to, for example, a case where the State of Charge (SOC) of the battery 31 is less than 80%. The control device 50 also, for example, supplies power to the load 80 in such a way that the power received from the power grid 90 is reduced if the charge level of the energy storage equipment 30 is high. A high charge level of the energy storage equipment 30 refers to, for example, a case where the SOC of the battery 31 is 90% or higher.

[0055] If the power grid 90 is in a power outage state (Yes in step ST1), the control device 50 of the emergency power supply system 1 puts the first power generation equipment 10 into operation (step ST3). The control device 50 switches the first power generation equipment 10 to operation mode. The control device 50 also switches the connection state of the power supply changeover switch 46 to connect the first power generation equipment 10 to the multiple disaster prevention loads 82 and the multiple safety loads 83, 84. The control device 50 also stops the second power generation equipment 20 and the energy storage equipment 30. As a result, the multiple disaster prevention loads 82 and the multiple safety loads 83, 84 are powered by the first power generation equipment 10.

[0056] Therefore, as shown in Figure 4, from the time of the power outage t0 to time t1, the power generated by the first power generation equipment 10 15 increases in sync with the power consumed by the load 80 85. Also, from the time of the power outage t0 to time t1, the control device 50 stops the second power generation equipment 20 and the energy storage equipment 30. Note that in Figure 4, for clarity, the power generated by the second power generation equipment 20 25 is shown with the opposite sign to the power generated by the first power generation equipment 10 15. Also in Figure 4, the charge / discharge power 35 of the energy storage equipment 30 is shown with a positive value for charging power and a negative value for discharging power.

[0057] If the power grid 90 is in a power outage state, the control device 50 of the emergency power supply system 1 then determines whether the power consumption 85 of the load 80 is equal to or greater than the second threshold Th2 (see Figure 4) (step ST4). If the power consumption 85 of the load 80 is less than the second threshold Th2 (No in step ST4), the control device 50 of the emergency power supply system 1 keeps the second power generation equipment 20 stopped and repeatedly executes step ST4.

[0058] On the other hand, if the power consumption 85 of load 80 is greater than or equal to the second threshold Th2 (Yes in step ST4), the control device 50 of the emergency power supply system 1 puts the second power generation equipment 20 into operation (step ST5). The control device 50 switches the power conditioner 22 of the second power generation equipment 20 to operation mode. As a result, the multiple disaster prevention loads 82 and the multiple safety loads 83 and 84 are powered by the first power generation equipment 10 and the second power generation equipment 20.

[0059] In the example shown in Figure 4, at time t1, the power consumption 85 of load 80 matches the second threshold Th2. In contrast, from time t1 to time t2, the sum of the power generated by the second power generation equipment 20 (25) and the power generated by the first power generation equipment 10 (15) balances the power consumption 85 of load 80. Therefore, from time t1 to time t2, the power generated by the first power generation equipment 10 (15) is between the first threshold Th1 and the second threshold Th2. In the example shown in Figure 4, between time t2 and time t3, the power consumption 85 of multiple loads 80 decreases, so the battery 31 of the energy storage equipment 30 is charged.

[0060] After step ST5, it is determined whether the power generated by the first power generation equipment 10 15 is less than the first threshold Th1 (step ST6). If the power generated by the first power generation equipment 10 15 is not less than the first threshold Th1 (No in step ST6), the control device 50 of the emergency power supply system 1 keeps the second power generation equipment 20 in operation and repeatedly executes step ST6.

[0061] On the other hand, if the power generated by the first power generation equipment 10 (power 15) is less than the first threshold Th1 (Yes in step ST6), the control device 50 of the emergency power supply system 1 disconnects the second power generation equipment 20 (step ST7) and proceeds to step ST4. Here, disconnecting the second power generation equipment 20 means controlling the second power generation equipment 20 so that the power supply from the second power generation equipment 20 to the load 80 is stopped, and specifically, the second power generation equipment 20 is stopped. In other words, when power is being supplied to the load 80 from both the first power generation equipment 10 and the second power generation equipment 20, if the power generated by the first power generation equipment 10 (power 15) is less than the first threshold Th1, the control device 50 stops the power supply from the second power generation equipment 20 to the load 80. This makes it possible to shorten the time during which the power generated by the first power generation equipment 10 (power 15) is less than the first threshold Th1.

[0062] In the example shown in Figure 4, at times t4 and t5, the power generated by the first power generation equipment 10 (15) is equal to or greater than the first threshold Th1, so the second power generation equipment 20 is operating. On the other hand, at time t6, the power generated by the first power generation equipment 10 (15) is less than the first threshold Th1.

[0063] Through the above operation, the emergency power supply system 1 controls the power generated by the first power generation equipment 10 so as not to fall below the first threshold Th1. Therefore, it is possible to reduce the decrease in the power generation efficiency of the first power generation equipment 10. In addition, the emergency power supply system 1 operates the second power generation equipment 20 when the power consumption 85 of the load 80 is equal to or greater than the second threshold Th2. Therefore, the fuel consumption of the first power generation equipment 10 is reduced within the range in which the power generated by the first power generation equipment 10 is equal to or greater than the first threshold Th1, and it is possible to supply power to multiple disaster prevention loads 82 and multiple safety loads 83, 84 for as long as possible.

[0064] (4.2) Actions to take in the event of a fire Figure 5 is a graph showing the power supply changes when a fire occurs while power grid 90 is experiencing a power outage.

[0065] If a fire occurs while the power grid 90 is in a power outage state, the control device 50 switches the fire shutdown switches 47, 49 and shutdown switch 48 to the open state. As a result, the multiple disaster prevention loads 82 receive power from the first power generation equipment 10. In contrast, the multiple safety loads 83 and 84 are disconnected from the first power generation equipment 10, the second power generation equipment 20, and the energy storage equipment 30, and enter a shutdown state. The second power generation equipment 20 and the energy storage equipment 30 are also disconnected from the first power generation equipment 10 and from all of the loads 80. The second power generation equipment 20 and the energy storage equipment 30 then transition to a shutdown state.

[0066] In the example shown in Figure 5, a fire is detected at time t11. As a result, power is lost to multiple safety loads 83 and 84, causing the power consumption 85 of load 80 to decrease at time t11. Also in the example shown in Figure 5, at time t13, the first power generation equipment 10 runs out of fuel and shuts down, causing the multiple disaster prevention loads 82 to also shut down.

[0067] In Figure 5, the power generated by the first power generation equipment 10, shown by the dashed line, represents the power change assuming that the first power generation equipment 10 continues to supply power to multiple disaster prevention loads 82 and multiple safety loads 83 and 84 even after time t11. In this case, the first power generation equipment 10 runs out of fuel at time t12, before time t13, causing the first power generation equipment 10 to stop and the multiple disaster prevention loads 82 and multiple safety loads 83 and 84 to stop. In other words, in the event of a fire, the control device 50 can stop the power supply from the first power generation equipment 10 to the multiple safety loads 83 and 84, thereby extending the operating time of the multiple disaster prevention loads 82.

[0068] As a result of the above operation, in the emergency power supply system 1, if a fire occurs while the power grid 90 is in a power outage state, power is supplied from the first power generation equipment 10 to multiple disaster prevention loads 82, while the power supply to multiple safety loads 83 and 84 is stopped. This allows the first power generation equipment 10 to function as an emergency power source for firefighting, and makes it possible to extend the period of power supply to the multiple disaster prevention loads 82 as much as possible.

[0069] (5) Effects The emergency power supply system 1 according to this embodiment includes a power receiving facility 40, a first power generation facility 10, a second power generation facility 20, and a control device 50. The power receiving facility 40 receives power from the power grid 90. The first power generation facility 10 generates electricity using fuel. The second power generation facility 20 generates electricity using renewable energy. The control device 50 controls the first power generation facility 10 and the second power generation facility 20. When the power grid 90 is in a power outage state and power needs to be supplied to a load 80, the control device 50 causes the first power generation facility 10 to supply power to the load 80 before causing the second power generation facility 20 to supply power to the load 80.

[0070] According to the emergency power supply system 1 of this embodiment, it is possible to improve the power generation efficiency of the power generation equipment. More specifically, according to the emergency power supply system 1 of this embodiment, it is possible to reduce the occurrence of a situation in which the power output of the first power generation equipment 10 is too little relative to the capacity of the first power generation equipment 10.

[0071] Furthermore, in the emergency power supply system 1 according to this embodiment, the control device 50 operates the first power generation equipment 10 so that the power generated by the first power generation equipment 10 is equal to or greater than the first threshold Th1 when the power grid 90 is in a power outage state.

[0072] According to the emergency power supply system 1 of this embodiment, it is possible to reduce the occurrence of a decrease in the power generation efficiency of the first power generation equipment 10.

[0073] Furthermore, in the emergency power supply system 1 according to this embodiment, the control device 50 causes power to be supplied to the load 80 from both the first power generation equipment 10 and the second power generation equipment 20 when the power system 90 is in a power outage state and the power consumption of the load 80 is equal to or greater than the second threshold Th2. The second threshold Th2 is greater than the first threshold Th1.

[0074] According to the emergency power supply system 1 of this embodiment, it is possible to reduce the occurrence of a decrease in the power generation efficiency of the first power generation equipment 10 and to save fuel for the first power generation equipment 10 at the same time.

[0075] Furthermore, in the emergency power supply system 1 according to this embodiment, if the power grid 90 is in a power outage state and the second power generation equipment 20 is supplying power to the load 80, the control device 50 will stop supplying power from the second power generation equipment 20 to the load 80 if the power generated by the first power generation equipment 10 15 is less than the first threshold Th1.

[0076] According to the emergency power supply system 1 of this embodiment, it is possible to reduce the occurrence of a decrease in the power generation efficiency of the first power generation equipment 10.

[0077] Furthermore, the emergency power supply system 1 according to this embodiment further includes a fire detection device 70. The fire detection device 70 detects a fire. The load 80 includes a disaster prevention load 82 and safety loads 83 and 84. When a fire occurs while the power grid 90 is in a power outage state, the control device 50 supplies power from the first power generation equipment 10 to the disaster prevention load 82 and stops the output of power from the second power generation equipment 20 and the power supply to the safety loads 83 and 84.

[0078] According to the emergency power supply system 1 of this embodiment, in the event of a fire, the first power generation equipment 10 functions as an emergency power supply for firefighting, making it possible to extend the power supply period to the multiple disaster prevention loads 82 to the maximum extent possible.

[0079] Furthermore, in the emergency power supply system 1 according to this embodiment, the first power generation equipment 10 includes a diesel generator.

[0080] According to the emergency power supply system 1 of this embodiment, it is possible to improve the power generation efficiency of a diesel generator, which tends to experience a decrease in power generation efficiency when operated at low output. Furthermore, according to the emergency power supply system 1 of this embodiment, malfunctions caused by operating the diesel generator at low output are less likely to occur.

[0081] Furthermore, in the emergency power supply system 1 according to this embodiment, the second power generation equipment 20 includes a solar power generation equipment that generates electricity using sunlight.

[0082] According to the emergency power supply system 1 of this embodiment, it is possible to conserve fuel for the first power generation equipment 10 by appropriately using electricity generated by solar power generation.

[0083] The control device 50 according to this embodiment controls the first power generation equipment 10 and the second power generation equipment 20. The first power generation equipment 10 generates electricity using fuel. The second power generation equipment 20 generates electricity using renewable energy. When the power grid 90 is in a power outage state and power is to be supplied to the load 80, the control device 50 causes the first power generation equipment 10 to supply power to the load 80 before causing the second power generation equipment 20 to supply power to the load 80.

[0084] According to the control device 50 of this embodiment, it is possible to improve the power generation efficiency of the power generation equipment. More specifically, according to the control device 50 of this embodiment, it is possible to reduce the occurrence of a situation in which the power output of the first power generation equipment 10 is too little relative to the capacity of the first power generation equipment 10.

[0085] The emergency power supply control method according to the embodiment is executed by one or more processors. The emergency power supply control method controls the first power generation equipment 10 and the second power generation equipment 20. The first power generation equipment 10 generates electricity using fuel. The second power generation equipment 20 generates electricity using renewable energy. The emergency power supply control method includes a control step ST3. In the control step ST3, when supplying power to the load 80 when the power system 90 is in a power outage state, the first power generation equipment 10 is made to supply power to the load 80 before the second power generation equipment 20 is made to supply power to the load 80.

[0086] According to the emergency power control method of the embodiment, it is possible to improve the power generation efficiency of the power generation equipment. More specifically, according to the emergency power control method of the embodiment, it is possible to reduce the occurrence of a situation in which the power output of the first power generation equipment 10 is too little relative to the capacity of the first power generation equipment 10.

[0087] (Variation 1) (1) Composition Although the operation of the energy storage equipment 30 during a power outage in the power grid 90 is not described in detail in this embodiment, the control device 50 may operate the energy storage equipment 30 as follows.

[0088] When the power grid 90 is experiencing a power outage and the charge level of the energy storage equipment 30 is low, the control device 50 operates the first power generation equipment 10 so that the power generated by the first power generation equipment 10 is equal to or greater than the first threshold Th1, and charges the energy storage equipment 30 using part or all of the power output by the second power generation equipment 20. Specifically, the control device 50 operates the first power generation equipment 10 so that the power generated by the first power generation equipment 10 is equal to or greater than the first threshold Th1. Then, if the power generated by the second power generation equipment 20 is greater than the difference between the power consumption of the load 80 (85) and the power generated by the first power generation equipment 10 (15), it charges the energy storage equipment 30 using the excess power.

[0089] Furthermore, if the power storage equipment 30 has a large charge while the power grid 90 is experiencing a power outage, the control device 50 operates the first power generation equipment 10 so that the power generated by the first power generation equipment 10 is equal to or greater than the first threshold Th1, thereby supplying power to the load 80 from the power storage equipment 30 as well.

[0090] (2) Effects Furthermore, the emergency power supply system 1 according to this embodiment further includes an energy storage facility 30. When the power grid 90 is in a power outage state, the control device 50 operates the first power generation facility 10 so that the power generated by the first power generation facility 10 is equal to or greater than a first threshold Th1, and causes the second power generation facility 20 to charge the energy storage facility 30.

[0091] According to the emergency power supply system 1 of this embodiment, the energy storage equipment 30 can be charged using the power from the second power generation equipment 20, making it possible to extend the time during which power can be supplied from the energy storage equipment 30.

[0092] Furthermore, in the emergency power supply system 1 according to this embodiment, the control device 50 supplies power from the energy storage equipment 30 to the load 80 when the power grid 90 is in a power outage state.

[0093] According to the emergency power supply system 1 of this embodiment, it is possible to conserve fuel for the first power generation equipment 10.

[0094] (Modification 2) (1) Composition In this embodiment, the case where the power consumption 85 of the load 80 is greater than or equal to the third threshold Th3 (see Figure 4) is not described, but when the power consumption 85 of the load 80 is greater than or equal to the third threshold Th3, the control device 50 may perform the following control. The third threshold Th3 is greater than the second threshold Th2, for example, 90% of the capacity of the first power generation equipment 10.

[0095] The control device 50 stops supplying power from the first power generation equipment 10 to a portion of the load 80 when the power consumption 85 of the load 80 is equal to or greater than the third threshold Th3. Specifically, when the power consumption 85 of the load 80 is equal to or greater than the third threshold Th3, the control device 50 switches the cutoff switch 48 (see Figure 2) to the open state, thereby disconnecting the safety load 84 (see Figure 2), which is a portion of the load 80. In other words, when the power consumption 85 of the load 80 is equal to or greater than the third threshold Th3, the control device 50 stops supplying power to the safety load 83 and a portion of the safety load 84, thereby reducing the power consumption 85 of the load 80. This makes it possible to reduce the occurrence of a situation in which the first power generation equipment 10 runs out of fuel prematurely and becomes unusable.

[0096] (2) Effects Furthermore, in the emergency power supply system 1 according to this embodiment, the control device 50 stops supplying power to the safety load 84, which is part of the load 80, when the power system 90 is in a power outage state and the power consumption 85 of the load 80 is greater than or equal to the third threshold Th3. The third threshold Th3 is greater than the second threshold Th2.

[0097] According to the emergency power supply system 1 of this embodiment, it is possible to reduce the likelihood of the first power generation equipment 10 shutting down prematurely due to running out of fuel, which can occur when the power generated by the first power generation equipment 10 becomes excessive.

[0098] (Variation 3) (1) Composition In the emergency power supply system 1 according to modified example 3, the second power generation equipment 20 and the energy storage equipment 30 share one power conditioner 23.

[0099] As shown in Figure 6, the second power generation equipment 20 includes solar panels 21 and a power conditioner 23. The energy storage equipment 30 includes a battery 31 and a power conditioner 23. In other words, the power conditioner 23 functions as part of the second power generation equipment 20 and also as part of the energy storage equipment 30.

[0100] The power conditioner 23 has a DC input terminal connected to the solar panel 21, AC input / output terminals connected to the fire prevention circuit 44 via a fire-trigger switch 47, and charge / discharge terminals connected to the battery 31. The power conditioner 23 includes, for example, an inverter and a charging circuit.

[0101] The inverter of the power conditioner 23 converts either the DC power output from the solar panels 21 or the DC current output from the battery 31, or both, into AC power and outputs it to the fire prevention circuit 44 via the fire-trigger switch 47. When the power grid 90 is not experiencing a power outage, the power conditioner 23 operates in grid connection to the power grid 90. When the power grid 90 is experiencing a power outage, the power conditioner 23 either outputs power or remains stopped.

[0102] The charging circuit of the power conditioner 23 charges the battery 31. When the battery 31 is charged using AC power output from the power grid 90 or the first power generation equipment 10, the charging circuit operates as a converter that converts AC power to DC power. When the battery is charged using DC power output from the solar panel 21, the charging circuit operates as a converter that converts voltage.

[0103] Furthermore, the power conditioner 23 and the energy storage equipment 30 may be housed in a single enclosure and integrated. This makes it possible to reduce the footprint between the second power generation equipment 20 and the energy storage equipment 30.

[0104] (2) Effects The emergency power supply system 1 according to Modification 3 also provides the same effects as the emergency power supply system 1 according to Embodiment 1.

[0105] Furthermore, in the emergency power supply system 1 according to Modification 3, both the solar panel 21 and the storage battery 31 are connected to the power conditioner 23 by a DC circuit. Therefore, when charging the storage battery 31 using the power output from the solar panel 21, power conversion can be performed, for example, with a DC / DC converter, thus reducing power conversion losses.

[0106] (Other modifications according to the embodiment) (1) In this embodiment, the power receiving equipment 40 receives high-voltage AC power of 6600V from the power grid 90, but the power receiving equipment 40 may not include transformer equipment and may directly receive low-voltage AC power.

[0107] In this embodiment, the power system 90 is a commercial power source. However, the power system 90 is not limited to a commercial power source; for example, it may be a power system in which a commercial power source and a distributed power source are interconnected and operate.

[0108] (2) In this embodiment, the first threshold Th1 is 30% of the capacity of the first power generation equipment 10. However, the first threshold Th1 is not limited to 30% of the capacity of the first power generation equipment 10, and the first threshold Th1 may be a value suitable as the minimum power output by the first power generation equipment 10. Similarly, the second threshold Th2 is not limited to 50% of the capacity of the first power generation equipment 10, and may be a value that allows the power output by the first power generation equipment 10 to be easily maintained at or above the first threshold Th1 when power is supplied to the load 80 from both the first power generation equipment 10 and the second power generation equipment 20.

[0109] (3) In this embodiment, apparent power is used as the power generated by the first power generation equipment 10, and the first power generation equipment 10 is controlled so that the apparent power is equal to or greater than the first threshold Th1. However, the power generated by the first power generation equipment 10 may also be the effective power output from the first power generation equipment 10.

[0110] (Appearance) The first embodiment of the emergency power supply system (1) comprises a power receiving unit (40), a first power generation unit (10), a second power generation unit (20), and a control device (50). The power receiving unit (40) receives power from the power grid (90). The first power generation unit (10) generates electricity using fuel. The second power generation unit (20) generates electricity using renewable energy. The control device (50) controls the first power generation unit (10) and the second power generation unit (20). When the power grid (90) is in a power outage state and power is to be supplied to a load (80), the control device (50) causes the first power generation unit (10) to supply power to the load (80) before causing the second power generation unit (20) to supply power to the load (80).

[0111] According to the emergency power supply system (1) described above, it is possible to improve the power generation efficiency of the power generation equipment. More specifically, according to the emergency power supply system (1) described above, it is possible to reduce the occurrence of a situation in which the power generated (15) of the first power generation equipment (10) is too little compared to the capacity of the first power generation equipment (10).

[0112] In the emergency power supply system (1) according to the second embodiment, in the first embodiment, the control device (50) operates the first power generation equipment (10) such that the power generated by the first power generation equipment (10) (15) is equal to or greater than a first threshold (Th1) when the power grid (90) is in a power outage state.

[0113] According to the emergency power supply system (1) described above, it is possible to reduce the occurrence of a decrease in the power generation efficiency of the first power generation facility (10).

[0114] In the third embodiment of the emergency power supply system (1), in the second embodiment, the control device (50) causes power to be supplied to the load (80) from both the first power generation equipment (10) and the second power generation equipment (20) when the power grid (90) is in a power outage state and the power consumption (85) of the load (80) is equal to or greater than the second threshold (Th2). The second threshold (Th2) is greater than the first threshold (Th1).

[0115] According to the emergency power supply system (1) described above, it is possible to reduce the occurrence of a decrease in the power generation efficiency of the first power generation facility (10) and to save fuel for the first power generation facility (10) at the same time.

[0116] In the emergency power supply system (1) according to the fourth embodiment, in the third embodiment, the control device (50) stops supplying power to a portion of the load (80) (safety load 84) when the power system (90) is in a power outage state and the power consumption (85) of the load (80) is greater than or equal to the third threshold (Th3). The third threshold (Th3) is greater than the second threshold (Th2).

[0117] According to the emergency power supply system (1) described above, it is possible to reduce the likelihood of the first power generation facility (10) shutting down prematurely due to running out of fuel, which can occur when the power generated (15) of the first power generation facility (10) becomes excessive.

[0118] In the emergency power supply system (1) according to the fifth embodiment, in the third or fourth embodiment, the control device (50) stops supplying power from the second power generation equipment (20) to the load (80) if the power generated by the first power generation equipment (10) (15) is less than the first threshold (Th1) when the power grid (90) is in a power outage state and the second power generation equipment (20) is supplying power to the load (80).

[0119] According to the emergency power supply system (1) described above, it is possible to reduce the occurrence of a decrease in the power generation efficiency of the first power generation facility (10).

[0120] The emergency power supply system (1) according to the sixth embodiment further comprises an energy storage facility (30) in any of the second to fifth embodiments. The control device (50) operates the first power generation facility (10) so that the power generated by the first power generation facility (10) (15) is equal to or greater than a first threshold (Th1) when the power grid (90) is in a power outage state, and causes the second power generation facility (20) to charge the energy storage facility (30).

[0121] According to the emergency power supply system (1) described above, the power from the second power generation facility (20) can be used to charge the energy storage facility (30), making it possible to extend the time during which power can be supplied from the energy storage facility (30).

[0122] In the emergency power supply system (1) according to the seventh embodiment, in the sixth embodiment, the control device (50) causes the energy storage equipment (30) to supply power to the load (80) when the power grid (90) is in a power outage state.

[0123] According to the emergency power supply system (1) described above, it is possible to conserve fuel for the first power generation equipment (10).

[0124] The emergency power supply system (1) according to the eighth aspect further comprises a fire detection device (70) for detecting fire in any of the first to seventh aspects. The load (80) includes a disaster prevention load (82) and safety loads (83, 84). When a fire occurs while the power grid (90) is in a power outage state, the control device (50) supplies power from the first power generation equipment (10) to the disaster prevention load (82), and stops the output of power from the second power generation equipment (20) and the power supply to the safety loads (83, 84).

[0125] According to the emergency power supply system (1) described above, in the event of a fire, the first power generation equipment (10) functions as an emergency power supply for firefighting, making it possible to extend the power supply period to multiple disaster prevention loads (82) to the maximum extent possible.

[0126] In the emergency power supply system (1) according to the ninth embodiment, in any of the first to eighth embodiments, the first power generation equipment (10) includes a diesel generator.

[0127] According to the emergency power supply system (1) described above, it is possible to improve the power generation efficiency of a diesel generator, which tends to have reduced power generation efficiency when operated at low output. Furthermore, according to the emergency power supply system (1) described above, malfunctions caused by operating the diesel generator at low output are less likely to occur.

[0128] In the emergency power supply system (1) according to the tenth embodiment, in any of the first to ninth embodiments, the second power generation equipment (20) includes a solar power generation equipment that generates electricity using sunlight.

[0129] According to the emergency power supply system (1) described above, it is possible to conserve fuel for the first power generation equipment (10) by appropriately using electricity generated by solar power generation.

[0130] The control device (50) according to the eleventh embodiment controls the first power generation equipment (10) and the second power generation equipment (20). The first power generation equipment (10) generates electricity using fuel. The second power generation equipment (20) generates electricity using renewable energy. When the power grid (90) is in a power outage state and power is to be supplied to the load (80), the control device (50) causes the first power generation equipment (10) to supply power to the load (80) before causing the second power generation equipment (20) to supply power to the load (80).

[0131] According to the control device (50) in the above embodiment, it is possible to improve the power generation efficiency of the power generation equipment. More specifically, according to the control device (50) in the above embodiment, it is possible to reduce the occurrence of a situation in which the power output of the first power generation equipment (10) is too little relative to the capacity of the first power generation equipment (10).

[0132] The emergency power supply control method according to the twelfth embodiment is executed by one or more processors. The emergency power supply control method controls a first power generation facility (10) and a second power generation facility (20). The first power generation facility (10) generates electricity using fuel. The second power generation facility (20) generates electricity using renewable energy. The emergency power supply control method includes a control step (ST3). In the control step (ST3), when supplying power to a load (80) when the power system (90) is in a power outage state, the first power generation facility (10) is made to supply power to the load (80) before the second power generation facility (20) is made to supply power to the load (80).

[0133] According to the emergency power control method described above, it is possible to improve the power generation efficiency of the power generation equipment. More specifically, according to the emergency power control method described above, it is possible to reduce the occurrence of a situation in which the power output of the first power generation equipment (10) is too little for the capacity of the first power generation equipment (10). [Explanation of symbols]

[0134] 1. Emergency power supply system 10. Power Generation Facility No. 1 15. Power generation 20. Second power generation facility 30 Energy storage equipment 40 Power receiving equipment 50 Control device 70 Fire detection equipment 80 load 85 Power consumption 82 Disaster Prevention Load 83 Security load 84 Safety load (part of the load) 90 Power system Th1 First Threshold Th2 Second Threshold Th3 (Third Threshold) ST1 Power outage detection step ST3 Control Step

Claims

1. Power receiving equipment that receives power from the power grid, The first power generation facility generates electricity using fuel, The second power generation facility generates electricity using renewable energy, The system comprises a control device for controlling the first power generation equipment and the second power generation equipment, When the power system is in a power outage state and power is to be supplied to the load, the control device causes the first power generation equipment to supply power to the load before causing the second power generation equipment to supply power to the load. Emergency power supply system.

2. The control device operates the first power generation equipment so that the power generated by the first power generation equipment is equal to or greater than a first threshold when the power system is in a power outage state. The emergency power supply system according to claim 1.

3. The control device, when the power system is in a power outage state and the power consumption of the load is greater than or equal to a second threshold which is greater than the first threshold, causes power to be supplied to the load from both the first and second power generation equipment. The emergency power supply system according to claim 2.

4. The control device stops supplying power to a portion of the load when the power system is in a power outage state and the power consumption of the load is greater than or equal to a third threshold, which is greater than the second threshold. The emergency power supply system according to claim 3.

5. The control device, when the power system is in a power outage state and the second power generation equipment is supplying power to the load, will stop supplying power from the second power generation equipment to the load if the power generated by the first power generation equipment is less than the first threshold. The emergency power supply system according to claim 3.

6. With additional energy storage facilities, The control device, when the power system is in a power outage state, The first power generation equipment is operated so that the power generated by the first power generation equipment is equal to or greater than the first threshold. The second power generation equipment is used to charge the energy storage equipment. The emergency power supply system according to claim 2 or 3.

7. The control device, when the power system is in a power outage state, causes the power storage equipment to supply power to the load. The emergency power supply system according to claim 6.

8. Furthermore, it is equipped with fire detection equipment to detect fires, The aforementioned load includes disaster prevention loads and safety loads, The control device, when a fire occurs while the power system is in a power outage state, The electricity from the first power generation facility is supplied to the disaster prevention load. To stop the power output from the second power generation equipment and the power supply to the safety load, The emergency power supply system according to claim 1 or 2.

9. The first power generation facility includes a diesel generator, The emergency power supply system according to claim 1 or 2.

10. The second power generation facility includes a solar power generation facility that generates electricity using sunlight. The emergency power supply system according to claim 1 or 2.

11. A control device for controlling a first power generation facility that generates electricity using fuel and a second power generation facility that generates electricity using renewable energy, When the power system is in a power outage state and power is to be supplied to the load, the control device causes the first power generation equipment to supply power to the load before causing the second power generation equipment to supply power to the load. Control device.

12. A control method that is executed by one or more processors and controls a first power generation facility that generates electricity using fuel and a second power generation facility that generates electricity using renewable energy, When supplying power to a load while the power grid is in a power outage state, the control step includes causing the first power generation equipment to supply power to the load before causing the second power generation equipment to supply power to the load, Emergency power supply control method.

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