JP2016046982A - Power generation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power generation device capable of activating a fuel battery properly even in the event of a power system outage.SOLUTION: A power generation device comprises: a fuel battery 1; an auxiliary device 5 thereof; and a power conditioner 2. In the power generation device, a DC load of the auxiliary device accepts power supply from a DC link part 9 of the power conditioner. The power conditioner has connection terminals 20 for connecting a storage battery 4, and a step-up circuit part 12 for raising an input voltage to the terminals 20; DC power raised in voltage by the step-up circuit part 12 is supplied to the DC link part 9. The power generation device further comprises a power source line 21 for connecting between an output side of an inverter circuit part 8 and an AC load of the auxiliary device 5. When activating the fuel battery 1 during the outage of a power system 3, the storage battery 4 is connected to the connection terminals 20; DC power is supplied from the DC link part 9 to the DC load; AC power from the inverter circuit part is supplied to the AC load of the auxiliary device 5.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power generation device, and more particularly to a power generation device including a power conditioner that converts DC power generated by a fuel cell into AC power that can be connected to a power system.

  In this type of power generation device, power generated by the fuel cell is used during power generation of the fuel cell as a power source for operating the auxiliary device of the fuel cell, but is supplied from the power system when the fuel cell is started. AC power is used (see, for example, Patent Document 1).

  However, in such a configuration, the fuel cell cannot be started in the event of a power system power failure. Recently, a connection terminal for connecting a DC power source (battery) is provided in the power conditioner, and this connection terminal is provided with this connection terminal. There has been proposed a configuration in which DC power obtained from a connected DC power source is used as a driving power source for an auxiliary machine.

JP 2011-97727 A

  However, such a conventional power generation apparatus has the following problems, and improvements have been desired.

  That is, an AC load (for example, an igniter) that operates with AC power is included in the auxiliary equipment of the fuel cell. For this reason, the AC load of the auxiliary machine cannot be operated only with the configuration in which the DC power source is obtained from the battery, and the fuel cell cannot be normally started at the time of power failure of the power system.

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a power generator that can normally start a fuel cell even in the event of a power failure in the power system. There is.

  In order to achieve the above object, a power generator according to claim 1 of the present invention includes a fuel cell, an auxiliary device for the fuel cell, and a power condition for connecting the power generated by the fuel cell to a power system. The auxiliary machine includes a DC load and an AC load as electrical loads, and the power conditioner boosts the voltage of the DC power generated by the fuel cell, and An inverter circuit unit that converts DC power boosted by the converter circuit unit into AC power that can be linked to a power system, a DC link unit that connects the converter circuit unit and the inverter circuit unit, and each unit of the power conditioner In the power generator including the control unit to control, the power conditioner includes a connection terminal for connecting a storage battery, and a direct current input from the connection terminal. A step-up circuit for boosting pressure and supplying DC power to the DC link unit; a DC power supply unit for supplying DC power to the DC load of the auxiliary machine by supplying power from the DC link unit; and the boost circuit unit And an input voltage detecting means for detecting an input voltage to the inverter circuit section, and a power line connecting the output side of the inverter circuit section and the AC load of the auxiliary machine. The control section is the input voltage detecting means. The detected input voltage is monitored, and when an input voltage equal to or higher than a predetermined voltage is detected, the voltage of the DC link unit becomes a voltage necessary for outputting the operating power of the AC load in the inverter circuit unit. As described above, the control structure for controlling the boosting operation of the boosting circuit unit and operating the inverter circuit unit to supply the AC power output from the inverter circuit unit to the power supply line. Characterized by comprising a.

  In the power generator according to claim 1, when the storage battery is connected to the connection terminal of the power conditioner, the control unit of the power conditioner detects the connection of the storage battery through the monitoring of the input voltage by the input voltage detection means. When the connection of the storage battery is detected, the control unit of the power conditioner boosts the voltage of the DC link unit so that the voltage of the DC link unit becomes a predetermined voltage (voltage necessary for outputting the operating power of the AC load in the inverter circuit unit). While controlling the step-up operation of the circuit, the inverter circuit unit is operated to supply the AC power output from the inverter circuit unit to the AC load of the auxiliary machine through the power line. Thereby, the AC power for operation is supplied to the AC load of the auxiliary machine. On the other hand, with respect to the DC load of the auxiliary machine, DC power is supplied from the DC power supply unit. Thus, in the power generator according to claim 1, even when the power system is out of power, by connecting the storage battery, the power for operation is supplied from the storage battery to the direct current load and the alternating current load of the auxiliary equipment of the fuel cell. Then, the fuel cell can be activated.

  The power generator according to claim 2 of the present invention is the power generator according to claim 1, wherein the power line includes a terminal for outputting the power generated by the fuel cell in the event of a power failure of the power system. A self-supporting output unit is connected.

  In the power generator according to claim 2, since the self-sustained output unit is connected to the power line connecting the output side of the inverter circuit unit and the AC load of the auxiliary machine, the power generated by the fuel cell at the time of power failure of the power system Can be supplied to an external electrical load.

  The power generator according to claim 3 of the present invention is the power generator according to claim 2, wherein the power line is located closer to the AC load side of the auxiliary device than the connection with the self-supporting output unit. It is characterized by comprising switch means that can be controlled to open and close.

  In the power generator according to claim 3, in the power line connecting the output side of the inverter circuit unit and the AC load of the auxiliary machine, the control unit opens and closes the AC load side of the auxiliary machine rather than the connection part with the self-supporting output unit. Since controllable switch means is provided, the power supply to the AC load of the auxiliary machine can be stopped by opening the switch means. Therefore, the electric power from a storage battery can be supplied to an independent output part.

  A power generator according to claim 4 of the present invention is the power generator according to any one of claims 1 to 3, wherein the AC load is an ignition device that operates with AC power.

  According to the present invention, by connecting the storage battery to the connection terminal of the power conditioner, the DC power supplied from the storage battery is boosted by the boosting circuit unit and supplied to the DC link unit. DC power is supplied to the DC load via the DC power supply, and AC power is supplied to the AC load of the auxiliary machine via the inverter circuit. Therefore, even when the power system is out of power, the fuel cell (supplement of the fuel cell) is supplied. Machine) can be started normally.

  In the present invention, since the self-supporting output unit is connected to the power line connecting the output side of the inverter circuit unit and the AC load of the auxiliary machine, an AC power is supplied from the self-supporting output unit to the external electric load in the event of a power failure. Electric power can be supplied.

It is a circuit block diagram which shows schematic structure of the electric power generating apparatus which concerns on this invention. It is a circuit block diagram which shows schematic structure of the pressure | voltage rise circuit part and control board in the power conditioner of the power generator.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a schematic configuration of a power generator according to the present invention. The power generation apparatus shown in FIG. 1 is mainly composed of a fuel cell 1 and a power conditioner 2 that interconnects the power generated by the fuel cell 1 to the power system 3. The power generator shown in FIG. 2 has a configuration that can start the fuel cell 1 using the storage battery 4 at the time of a power failure of the power system 3.

  As is well known, the fuel cell 1 is a power generator that extracts, as DC power, electrical energy obtained by an electrochemical reaction between hydrogen (hydrogen-rich gas) and oxygen (air), and is a fuel cell stack that generates power by an electrochemical reaction ( (Not shown), an auxiliary machine 5 which is a peripheral device for operating the fuel cell stack, and an auxiliary machine control board 6 on which a control unit of the auxiliary machine 5 is mounted are mainly configured. In this embodiment, a solid oxide fuel cell (SOFC) is used as the fuel cell 1, but other types of fuel cells such as a polymer electrolyte fuel cell (PEFC) may be used.

  Here, although not illustrated, the auxiliary machine 5 includes a DC load that operates with DC power and an AC load that operates with AC power. Specifically, as the DC load of the auxiliary machine 5, for example, an air blower that boosts the air supplied to the fuel cell stack, and a fuel that boosts the raw fuel (city gas, LP gas, etc.) supplied to the fuel reformer A booster blower, a reforming water pump that supplies water for generating steam for reforming to the fuel reformer, a cooling water pump that supplies cooling water to the fuel cell stack, etc. are included. , Configured to operate at DC 24V. Further, the AC load of the auxiliary machine 5 includes a combustor ignition device (for example, an igniter) that combusts exhaust gas (off gas) discharged from the fuel cell stack. It is configured to work.

  The auxiliary machine control board 6 is composed of an electrical board provided with an auxiliary machine control unit (not shown) that controls the operation of the auxiliary machine 5. The auxiliary machine control unit mounted on the auxiliary machine control board 6 includes a microcomputer as a control center. The microcomputer is configured to be able to communicate with the control unit 15 (see FIG. 2) of the power conditioner 2. The operation of the auxiliary machine 5 is controlled while communicating with each other.

  The power conditioner 2 is a power converter that converts DC power generated by the fuel cell 1 into AC power (for example, single-phase three-wire AC100V / 200V) that can be connected to the power system 3, and is a converter circuit. The main unit includes a unit 7, an inverter circuit unit 8, a DC link unit 9, a grid interconnection switch 10, a rectifier circuit unit 11, a booster circuit unit 12, a control board 13, and a self-supporting output unit 14. ing.

  Specifically, the converter circuit unit 7 includes a DC / DC converter circuit (not shown) that boosts the voltage of the DC power generated by the fuel cell 1. The inverter circuit unit 8 includes a DC / AC inverter circuit (not shown) that converts the DC power boosted by the converter circuit unit 7 into AC power that can be linked to the power system 3. A DC link capacitor is connected in parallel between the converter circuit unit 7 and the inverter circuit unit 8, and the DC link unit that connects the converter circuit unit 7 and the inverter circuit unit 8 with this capacitor. 9 is formed. Note that the output voltages of the converter circuit unit 7 and the inverter circuit unit 8 are both controlled by the control unit 15.

  The grid connection switch 10 includes a switch circuit that switches between connection / disconnection of the power conditioner 2 and the power system 3. In the present embodiment, the grid connection switch 10 is configured to switch connection / disconnection between the power system 3 and the rectifier circuit unit 11 in conjunction with switching of connection / disconnection with the power system 3. ing. Specifically, the grid connection switch 10 is composed of a two-contact type switch including a contact neutrality. When the power conditioner 2 is linked to the power system 3, the switch contact is an output of the inverter circuit unit 8. When the power conditioner 2 is disconnected from the power system 3, the switch contact is connected to the rectifier circuit unit 11 side. The contact of the grid connection switch 10 can be controlled by the control unit 15.

  The rectifier circuit unit 11 is a rectifier circuit for converting AC power supplied from the power system 3 into DC power and supplying the DC power to the DC link unit 9, and in this embodiment, is constituted by a diode bridge circuit. .

  As shown in FIG. 2, the booster circuit unit 12 includes a booster circuit (DC / DC converter circuit) 17 that boosts the voltage of the DC power supplied from the storage battery 4 and supplies the boosted voltage to the DC link unit 9. Yes. Specifically, the booster circuit unit 12 is provided with a connection terminal 20 for detachably connecting the storage battery 4, and a DC voltage supplied from the storage battery 4 via the connection terminal 20 is a booster circuit. 17 is input. Between the connection terminal 20 and the booster circuit 17, an input voltage sensor (input voltage detection means) 18 for detecting an input voltage to the booster circuit unit 12 (boost circuit 17) is provided. The detection result of the sensor 18 is input to the control unit 15 via the signal line 19.

  As shown in FIG. 2, the control board 13 is equipped with a control unit 15 that controls the operation of each part of the power conditioner 2 and a DC power supply unit 16 that supplies DC power to the auxiliary machine control board 6. It consists of a substrate. The control unit 15 is a control device including a microcomputer (not shown) as a control center, and controls each part of the power conditioner 2 and is configured to be communicable with the auxiliary device control unit. The auxiliary machine 5 can be controlled via the unit. In the present embodiment, the control unit 15 is configured to monitor the detection result of the input voltage sensor 18 input from the signal line 19 (that is, the input voltage to the booster circuit unit 12) (for details). Will be described later).

  The DC power supply unit 16 includes a DC / DC converter whose input side is connected to the DC link unit 9 and whose output side is connected to the auxiliary machine control board 6, and the DC power obtained from the DC link unit 9 is used as the auxiliary machine 5. The voltage is converted to a voltage that can be supplied to the DC load and supplied to the auxiliary machine control board 6. That is, in this embodiment, since the direct current load of the auxiliary machine 5 operates at DC 24 V, the direct current power supply unit 16 is configured to generate DC 24 V and supply it to the auxiliary machine control board 6. In addition to the DC load power source for the auxiliary machine 5, the DC power source unit 16 is also configured to output DC 15V as a power source for operating the DC load of the power conditioner 2 such as the control unit 15. .

  The self-supporting output unit 14 includes a terminal (self-supporting outlet) for supplying AC power to an external electric device (not shown) at the time of self-power generation of the fuel cell 1 or the like. Specifically, as shown in FIG. 1, the self-supporting output unit 14 has one end at the output side of the inverter circuit unit 8 (specifically, between the output side of the inverter circuit unit 8 and the grid interconnection switch 10. ) And the other end is connected to a power line 21 connected to the auxiliary machine 5 (specifically, an AC load of the auxiliary machine 5).

  More specifically, the self-supporting output unit 14 includes one or a plurality of outlets, and each outlet is connected to the branch wiring 24 branched from the power supply line 21 via the self-supporting switch 22. The self-supporting switch 22 is a switch for switching between supply / cut-off of AC power to the self-supporting output unit 14, and the control unit 15 can control the opening / short-circuiting of the contact (open / close control). Note that the contact of the self-supporting switch 22 is open when the power conditioner 2 is performing a normal operation.

  Further, with respect to the power supply line 21, in the present embodiment, an open / close switch (switch) that can be controlled to open / close by the control unit 15 from the connection part of the power supply line 21 and the branch wiring 24 (independent output unit 14) to the AC load side of the auxiliary machine 5 Means) 23 is provided. This open / close switch 23 is used when the fuel cell 1 described later is started, and its contact is open except when power is supplied to the AC load of the auxiliary machine 5.

  The electric power system 3 is composed of a single-phase three-wire AC100 / 200V commercial power supply. Moreover, the storage battery 4 is comprised with the portable secondary battery which can output direct-current power, for example, the lead storage battery for vehicles etc. are used suitably as the storage battery 4. FIG.

Next, the operation of the power generator configured as described above will be described.
A: Normal operation (start of fuel cell)
When the fuel cell 1 is started in a state where the power system 3 is normal (no power failure), the grid connection switch 10 is connected to the rectifier circuit unit 11 side. As a result, AC power supplied from the power system 3 is supplied to the rectifier circuit unit 11, and DC power that is full-wave rectified in the rectifier circuit unit 11 is supplied to the DC link unit 9.

  When DC power is supplied to the DC link unit 9, the DC power is also supplied to the DC power supply unit 16 of the control board 13 connected to the DC link unit 9. The DC power supply unit 16 generates a DC voltage (DC 24V in the present embodiment) for operating the DC load of the auxiliary machine 5 from the DC power supplied from the DC link unit 9, and the auxiliary voltage is supplied via the auxiliary machine control board 6. Supply to DC load of machine 5. At this time, AC power of AC 100 V is supplied from the power system 3 to the AC load of the auxiliary machine 5 through a power line (not shown). The contacts of the open / close switch 23 of the power supply line 21 and the self-supporting switch 22 of the branch wiring 24 are both open.

  When power for operation is supplied to the DC load and the AC load of the auxiliary machine 5 in this way, the auxiliary machine control unit of the auxiliary machine control board 6 operates the auxiliary machine 5 to generate power in the fuel cell 1. To start.

B: Normal operation (power generation operation of fuel cell)
When the fuel cell 1 is activated, the control unit 15 operates the power conditioner 3 in a normal operation (operates the converter circuit unit 7 and the inverter circuit unit 8 and connects the contact point of the grid interconnection switch 10 to the inverter circuit unit 8 side. The AC power output from the inverter circuit unit 8 is linked to the power system 3). At this time, the control unit 15 monitors the input voltage and input current to the converter circuit unit 7 and the output voltage and output current of the inverter circuit unit 8, and can exchange AC power from the inverter circuit unit 8 to the power system 3. The operations of the converter circuit unit 7 and the inverter circuit unit 8 are controlled so that (single-phase AC 200 V) is output. At this time, the contacts of the open / close switch 23 and the self-standing switch 22 are both kept open.

C: During power system outage (independent power generation operation)
The power generation apparatus shown in the present embodiment has a self-sustaining power generation function that allows the fuel cell 1 to continue power generation even during a power failure of the power system 3. When the control unit 15 of the power conditioner 2 detects a power failure in the power system 3, the control unit 15 disconnects the power conditioner 2 from the power system 3. Further, the control unit 15 controls the converter circuit unit 7 and the inverter circuit unit 8 so that the output voltage of the inverter circuit unit 8 becomes AC 100 V, and short-circuits the contact of the self-supporting switch 22. As a result, AC power (AC 100 V) output from the inverter circuit unit 8 is supplied to the self-sustained output unit 14, and an electric load that operates at AC 100 V can be used in the self-supporting output unit 14.

D: At power failure (start of fuel cell)
When the fuel cell 1 is started in a state where the power system 3 is out of power, the storage battery 4 is connected to the connection terminal 20 of the booster circuit unit 12 in the power generation device of the present embodiment. As a result, DC power is supplied from the storage battery 4 to the booster circuit 17 of the booster circuit unit 12.

  When the storage battery 4 is connected to the booster circuit unit 12, the input voltage sensor 18 detects the input voltage from the storage battery 4, and the result is input to the control unit 15. When the input voltage sensor 18 detects an input voltage that is equal to or higher than a predetermined voltage, the control unit 15 needs the voltage of the DC link unit 9 so that the inverter circuit unit 8 outputs the operating power of the AC load of the auxiliary machine 5. The step-up operation of the step-up circuit unit 12 is controlled so as to obtain a stable voltage. That is, the control unit 15 controls the voltage of the DC link unit 9 through the boosting operation control of the boosting circuit unit 12 and adjusts the voltage of the DC link unit 9 so that AC power of AC 100 V is output from the inverter circuit unit 8. .

  When the inverter circuit unit 8 can output AC power of 100 V AC, the control unit 15 short-circuits the contact of the open / close switch 23 and starts supplying AC power to the AC load of the auxiliary machine 5. At this time, the inverter circuit unit 8 is controlled so that the output voltage becomes AC 100V. In other words, the inverter circuit unit 8 is controlled to output AC 200 V during normal operation, but when operating during a power failure of the power system 3, the inverter circuit unit 8 is operated during normal operation according to the operating voltage of the AC load of the auxiliary machine 5. Is controlled to a lower output voltage. At this time, the contact of the self-supporting switch 22 is kept open.

  At this time, since the DC power is supplied from the DC link unit 9 to the DC power source unit 16, the DC power source unit 16 generates a DC voltage (DC 24V) for operating the DC load of the auxiliary machine 5 from the DC power. Then, it is supplied to the DC load of the auxiliary machine 5 through the auxiliary machine control board 6.

  In this way, when operating power is supplied to the DC load and the AC load of the auxiliary machine 5, the control unit 15 operates the auxiliary machine 5 through the auxiliary machine control unit to start the fuel cell 1. In addition, after the fuel cell 1 is started, the power generation of the fuel cell 1 can be continued without the need for the storage battery 5, and therefore the storage battery 4 is removed after the fuel cell 1 is started.

  When the fuel cell 1 starts power generation, the control unit 15 opens the contact of the open / close switch 23 to stop the power supply to the AC load of the auxiliary machine 5 and sets the self-supporting switch 22 to a short-circuiting state. AC power is output from 14 (independent power generation operation). Here, the opening / closing switch 23 is opened. The ignition device that is an AC load of the auxiliary machine 5 ignites the combustor when the fuel cell 1 is started, and thereafter combustion in the combustor continues. This is because there is no need for reignition.

  As described above, according to the power generation device of the present invention, even when the power system 3 is in a power failure state, the battery 4 is supplied from the storage battery 4 by connecting the storage battery 4 to the connection terminal 20 of the power conditioner 2. Since the operating power is supplied to both the direct current load and the alternating current load of the auxiliary machine 5 using the direct current power, the fuel cell 1 can be normally started even when the power system 3 is out of power.

E: At the time of power system power outage (when using a self-sustained output unit without performing self-sustaining power generation)
Since the power generator shown in the present embodiment has a configuration that can start the fuel cell 1 using the storage battery 4 at the time of a power failure of the power system 3, without using the configuration to start the fuel cell 1, AC power can be output from the self-supporting output unit 14.

  That is, in this case, when the control unit 15 detects that the storage battery 4 is connected by the input voltage from the input voltage sensor 18, the voltage of the DC link unit 9 is necessary for the inverter circuit unit 8 to output AC 100V. The step-up operation of the step-up circuit unit 12 is controlled so as to obtain a stable voltage.

  Then, when the inverter circuit unit 8 can output AC power of AC 100V, the control unit 15 does not short-circuit the contact of the open / close switch 23 (that is, maintains the open state), and connects the contact of the self-supporting switch 22. Short circuit. In addition to this control, the control unit 15 controls the inverter circuit unit 8 so that the output voltage of the inverter circuit unit 8 becomes AC 100V. That is, also in this case, the control unit 15 controls the output voltage of the inverter circuit unit 8 to be lower than that during normal operation so that the output voltage of the inverter circuit unit 8 becomes a voltage extracted by the self-supporting output unit 14.

  As a result, AC 100V AC power output from the inverter circuit unit 8 is supplied to the self-sustained output unit 14, and the self-sustained output unit 14 is used without starting the fuel cell 1, that is, external electric power. The device can be used.

  Thus, according to the power generator according to the present invention, AC power can be taken out from the self-sustained output unit 14 without starting the fuel cell 1 when the power system 3 is out of power.

  The above-described embodiment shows a preferred embodiment of the present invention, and the present invention is not limited to this, and various design changes can be made within the scope of the invention.

  For example, in the above-described embodiment, the configuration in which the power supply line 21 includes the open / close switch 23 is shown, but the open / close switch 23 may be omitted. That is, it is possible to switch the supply / stop of the AC power to the power line 21 by attaching / detaching the storage battery 4.

  In the above-described embodiment, the case where the power generation device according to the present invention is used alone is shown. However, the present invention is applied to a cogeneration system that generates warm water using exhaust heat generated in the fuel cell 1. It is also possible.

DESCRIPTION OF SYMBOLS 1 Fuel cell 2 Power conditioner 3 Electric power system 4 Storage battery 5 Fuel cell auxiliary machine 7 Converter circuit part 8 Inverter circuit part 9 DC link part 10 System interconnection switch 12 Boost circuit part 13 Control board 14 Self-supporting output part 15 Control part 16 DC power supply unit 18 Input voltage sensor (input voltage detection means)
20 connection terminal 22 self-supporting switch 23 open / close switch (switch means)

Claims (4)

Comprising a fuel cell, an auxiliary device of the fuel cell, and a power conditioner for connecting the power generated by the fuel cell to the power system,
The auxiliary machine includes a DC load and an AC load as electrical loads,
The power conditioner includes a converter circuit unit that boosts a voltage of DC power generated by the fuel cell, and an inverter circuit that converts the DC power boosted by the converter circuit unit into AC power that can be connected to a power system. A power generation apparatus comprising: a power supply unit; a DC link unit that connects the converter circuit unit and the inverter circuit unit; and a control unit that controls each unit of the power conditioner.
The power conditioner includes a connection terminal for connecting a storage battery, a booster circuit unit that boosts a DC voltage input from the connection terminal and supplies DC power to the DC link unit, and power from the DC link unit. A DC power supply for supplying DC power to the DC load of the auxiliary device and input voltage detecting means for detecting an input voltage to the booster circuit, and an output side of the inverter circuit and the auxiliary Equipped with a power line to connect the AC load of the machine,
The control unit monitors the input voltage detected by the input voltage detecting means, and when an input voltage equal to or higher than a predetermined voltage is detected, the voltage of the DC link unit is changed to the operation of the AC load in the inverter circuit unit. The step-up operation of the step-up circuit unit is controlled so that the voltage is necessary to output electric power, and the inverter circuit unit is operated to supply AC power output from the inverter circuit unit to the power supply line. A power generation device comprising a supply control structure.   The power generator according to claim 1, wherein a self-supporting output unit including a terminal that outputs power generated by the fuel cell at the time of a power failure of the power system is connected to the power line.   3. The power generation according to claim 2, wherein the power supply line includes switch means that can be controlled to be opened and closed by the control unit on the AC load side of the auxiliary machine with respect to the connection part with the independent output unit. apparatus.   The power generator according to claim 1, wherein the AC load is an ignition device that operates with AC power.

Images