JP5968581B1 - Power generation system, load test method - Google Patents

Abstract

Each of the power generation system resistance units that can perform a battery discharge test and a generator load test has a battery and a charging circuit, and the first switch unit controls the power to the battery of the resistance unit or a specific electrical device. Used to switch the supply source between the commercial power supply and the generator, and the second switch unit switches the supply source of power to the specific electrical equipment between the generator and the battery of the resistance unit via the inverter. It is used to control and when it is set to test mode, the power from the battery is supplied through the inverter and the second switch unit for the specified electrical The power supply from the battery to the specific electric device is stopped for the load test of the generator, and is supplied to the device via the first switch unit. Power from electrical machine is supplied to the battery.

Description

  The present invention relates to a power generation system that supplies power during a power failure.

  Conventionally, as in Patent Document 1, a power generation system (power supply device) that supplies power during a power failure has been proposed.

JP 2013-230063 A

  However, tests for proper operation of the generator and battery are not considered.

  Accordingly, an object of the present invention is to provide a power generation system capable of performing a battery discharge test and a generator load test.

  A power generation system according to the present invention generates an engine, generates power based on the output of the engine, is connected to an external specific electrical device, a resistance unit having a plurality of resistance units, an inverter, and a normal mode. A power generation system including an operation unit used for switching between test modes, a first switch unit, and a second switch unit, wherein the plurality of resistance units are connected in parallel to the generator, Each of the plurality of resistance units has a battery and a charging circuit provided between the battery and the generator, and the first switch unit supplies a power supply source to the battery of the resistance unit or the specific electric device. , Used for switching control between commercial power supply and generator, the second switch part is the power supply source to the specific electrical equipment via the generator and inverter Used to control switching with the battery of the anti-unit, and when the power supply from the commercial power supply to the specified electrical equipment becomes impossible while the normal mode is set via the operation unit, the engine is started. Until the first time elapses or until the generator is in a steady operation state, the power from the battery is supplied to the specific electric device via the inverter and the second switch unit, and the operation unit is When the test mode is set, the power from the battery is supplied to the specific electrical device via the inverter and the second switch unit for the battery discharge test in a state where the generator generates power. Thereafter, for the load test of the generator, the power supply from the battery to the specific electric device is stopped, and the power from the generator is supplied to the plurality of batteries via the first switch unit. It is supplied to at least one of the.

  Even when the power supply from the commercial power supply is disabled by the power generation system that includes the generator that supplies power to the specified electrical equipment and the resistor unit that includes the battery, the power is supplied smoothly from the battery or generator. A specific electric device can be driven by electric power.

A plurality of resistance units including a battery are provided in parallel, and a load test of the generator can be performed by switching the connection state between the plurality of resistance units and the generator.
In addition, since power is supplied from the battery group to the specific electrical device before that, the battery group maintains power supply to the specific electrical device after the engine is started during a power failure until the generator enters steady operation. A test (discharge test) can be performed.
During the discharge test, the engine is started using the cell motor and power is generated by the generator, so even if a power outage occurs during the discharge test or load test, the generator instantly switches to the specified electrical device. Switch to power supply.

  Preferably, the power supply system further includes a discharge circuit having a load that consumes more power than a specific electric device connected to the power generation system, and a third switch unit, and the third switch unit supplies power from the battery via the inverter. Used for switching control between the specific electrical device and the discharge circuit, and when the test mode is set via the operation unit, the generator is generating power and is used for battery discharge testing. The electric power from the battery is supplied to the specific electrical device through the inverter, the third switch unit, and the second switch unit, and after the first time has elapsed and before the generator load test, the inverter and the third switch The power from the battery is supplied to the discharge circuit via the unit, and during the load test, the power supply from the battery to the discharge circuit is stopped, and the generator is connected via the first switch unit. Et power is supplied to at least one of the plurality of batteries.

After the discharge test is completed, the power supply from the battery group to the specific electric device is switched to the power supply from the battery group to the discharge circuit.
By switching to power supply to a discharge circuit with high power consumption, the battery discharge time can be shortened, and the use of specific electrical equipment can be minimized.

  More preferably, a relay is provided between the inverter and the third switch unit, and when the voltage or current detected by the relay falls below a threshold value, power is supplied from the battery to the discharge circuit via the inverter and the third switch unit. However, the power supply is switched from the generator to at least one of the batteries via the first switch unit.

  Preferably, the normally closed contact of the first switch unit that is connected to the movable contact of the first switch unit when the current is not flowing through the relay coil of the first switch unit is connected to the power line from the generator. The normally closed contact of the second switch part connected to the movable contact of the second switch part when the current is not flowing through the relay coil of the second switch part is a generator or commercial power source via the first switch part. Connected to the power line from

  Even if the power supply from the power supply for driving each switch is interrupted, the switch state for supplying power from the generator to the specified electrical device is maintained, so as long as the engine or generator is operating, the specified electrical device The power supply to can be maintained.

  A generator load test method in a power generation system according to the present invention includes an engine, a generator that generates power based on the output of the engine, and that is connected to an external specific electrical device, and a resistance unit having a plurality of resistance units. An inverter, an operation unit used for switching between the normal mode and the test mode, a first switch unit, and a second switch unit, and the plurality of resistance units are connected in parallel to the generator. Each of the plurality of resistance units has a battery and a charging circuit provided between the battery and the generator, and the first switch unit is a power supply source to the battery of the resistance unit or the specific electric device. Is used for switching control between a commercial power source and a generator, and the second switch unit controls the power supply source to the specific electric device, the generator and the inverter. If the power supply from the commercial power supply to the specified electrical equipment becomes impossible when the normal mode is set via the operation unit, the engine is switched off. The power from the battery is supplied to the specific electric device via the inverter and the second switch unit until the first time has elapsed from the start or until the generator is in a steady operation state. A battery discharge test step in which the electric power from the battery is supplied to the specific electric device through the inverter and the second switch unit in a state where the test mode is set through the generator and the generator is generating power, and the battery discharge test step. Thereafter, the power supply from the battery to the specific electrical device is stopped, and the power from the generator is sent to the plurality of batteries via the first switch unit. And a load test steps to be supplied to at least one.

  As described above, according to the present invention, it is possible to provide a power generation system capable of performing a battery discharge test and a generator load test.

It is a schematic diagram which shows the structure of the electric power generation system in this embodiment, and is a figure which shows the state which is "normal mode" and does not have a power failure. It is a figure which shows the structure of an operation part. It is a schematic diagram of a power generation system, and shows a state immediately after a power failure in “normal mode”. It is a schematic diagram of a power generation system, and is a figure which shows the state until a power failure is carried out in "normal mode" and a generator will be in a steady operation state. It is a schematic diagram of a power generation system, and is a diagram showing a state after a power failure occurs in “normal mode” and the generator is in a steady operation state. It is a schematic diagram of a power generation system and is a diagram showing a state when an engine is started in a “test mode”. It is a schematic diagram of a power generation system, and is a diagram showing a state where power is supplied from a battery group to a specific electrical device in a “test mode”. It is a schematic diagram of a power generation system and is a diagram showing a state where power is supplied from a battery group to a discharge circuit in a “test mode”. It is a schematic diagram of a power generation system, and is a diagram showing a state in which a load test of a generator is performed in “test mode”. It is a schematic diagram of a power generation system in the case of using a single-phase AC generator, and is a diagram showing a state after a power failure occurs in a “normal mode” and the generator is in a steady operation state. It is a schematic diagram of a power generation system when the cell motor is connected to the first battery group to the third battery group, and shows a state after a power failure occurs in the “normal mode” and the generator is in a steady operation state. .

  Hereinafter, the present embodiment will be described with reference to the drawings (see FIG. 1).

The power generation system 1 in the present embodiment is provided between a commercial power source and a specific electrical device, and is used to supply power to the specific electrical device when power supply from the commercial power source becomes impossible.
The power generation system 1 includes an engine 3, a generator 4, a cell motor 5, an operation unit 7, a control unit 8, a first relay 9a, a second relay 9b, a resistance unit 10 (first resistance unit 10a, second resistance unit 10b, Third resistor unit 10c), switching unit (first switch group SW1, second switch group SW2, third switch group SW3, first switch unit SWC1, second switch unit SWC2, third switch unit SWC3), inverter 51, It has the 3rd relay 53, the discharge circuit 55, the U-phase line Lu, the V-phase line Lv, and the W-phase line Lw.

  In addition, the specific electric device in the present embodiment includes an electric device that needs to be operated even in a state where power supply from a commercial power source is disabled, such as an emergency lighting apparatus or a smoke exhauster, and is usually a commercial power source. When the power supply from the commercial power supply is impossible, the battery is driven with the power supplied from the battery group (first battery group BG1 to third battery group BG3) or the generator 4.

  The engine 3 is a device that generates a rotational force based on the explosive force of gas and the like and applies the rotational force to the generator 4. The cell motor 5 is used to start the engine 3.

One of the U-phase line Lu, the V-phase line Lv, and the W-phase line Lw is connected to the first switch unit SWC1, and the other is connected to the second switch unit SWC2.
The U-phase line Lu is connected to the U-phase terminal UT of the generator 4 and the R-phase line Lr of the power line from the commercial power supply via the first switch unit SWC1.
The V-phase line Lv is connected to the V-phase terminal VT of the generator 4 and the S-phase line Ls of the power line from the commercial power supply via the first switch unit SWC1.
The W-phase line Lw is connected to the W-phase terminal WT of the generator 4 and the T-phase line Lt of the power line from the commercial power supply via the first switch unit SWC1.

  The operation unit 7 is a mode switch 7a used for switching between the “normal mode” and the “test mode” for performing the load test of the generator 4 and the battery discharge test of the resistor unit 10, and the load of the generator 4. Load amount adjustment switch 7b (first switch 7b1, second switch 7b2, third switch 7b3) for adjusting a load amount at the time of performing a test, that is, selecting a resistance unit connected to the generator 4, operation of the power generation system 1 It has the display part 7c which displays a state (refer FIG. 2).

  Based on the operation state of the operation unit 7 and the signals from the first relay 9a, the second relay 9b, and the third relay 53, the control unit 8 switches the switching unit (the first switch group SW1, the second switch group SW2, the first switch group SW2). 3 switches SW3, first switch unit SWC1, second switch unit SWC2, and third switch unit SWC3).

  Except when testing the generator 4 and the resistance unit 10, the mode switch 7a is set to “normal mode”. When testing the generator 4 and the resistance unit 10, the mode switch 7a is set to “test mode”. "Is set.

  When the mode switch 7a is set to the “normal mode” and power can be supplied from the commercial power source, the power from the commercial power source is supplied to the battery of the resistor unit 10 (first battery group BG1). , The second battery group BG2, the third battery group BG3) and the control unit 8 controls each switch of the switching unit so as to be supplied to the specific electrical device (see FIG. 1).

  When the mode switch 7a is set to the “normal mode” and the power supply from the commercial power source is not possible due to a power failure or the like, some battery groups (first Control is performed so that power from one battery group BG1) is supplied to the cell motor 5 and power from the remaining battery groups (second battery group BG2, third battery group BG3) is supplied to the specific electrical device. The unit 8 controls each switch of the switching unit (see FIG. 3).

After the engine 3 is started, power from all the battery groups (the first battery group BG1 to the third battery group BG3) is supplied to the specific electric device until the generator 4 is in a steady operation state. Thus, the control part 8 controls each switch of a switching part (refer FIG. 4).
The determination as to whether or not the generator 4 is in a steady operation state may be performed based on a signal output from the second relay 9b, or from the start of the engine 3 using a first time t1 described later. It may be determined based on whether or not the first time t1 has elapsed.

  After the generator 4 is in a steady operation, the control unit 8 controls each switch of the switching unit so that the electric power from the generator 4 is supplied to the specific electrical device (see FIG. 5).

  After the power failure state is resolved and the power supply from the commercial power source is enabled, the engine 3 and the generator 4 are stopped and returned to the state shown in FIG.

At least one of the battery groups (first battery group BG1, second battery group BG2, and third battery group BG3) is used as a power source for driving the operation unit 7, the control unit 8, and each switch. However, another battery (not shown) may be provided, and the other battery may be used for driving each switch.
Further, the first switch unit SWC1 is driven by a commercial power source, and when the power switch is in an on state, the commercial power source is connected to the movable contact, and when it is in an off state (power failure), the generator 4 is connected to the movable contact. It may be.

In the present embodiment, each switch is brought into the state shown in FIG. 5 when the current is not flowing through the relay coil of each switch.
For this reason, even if the power supply from the power source (in this case, one of the battery group) for driving the operation unit 7, the control unit 8, or each switch is interrupted, the switch that supplies power from the generator to the specific electrical device Since the state (switch state in FIG. 5) is maintained, as long as the engine 3 and the generator 4 are operating, it is possible to maintain power supply to the specific electrical device.

  When the mode switch 7a is set to the “test mode”, the electric power from a part of the battery group (first battery group BG1) is supplied to the cell motor 5 for starting the engine 3 and discharging the battery group. The control unit 8 controls each switch of the switching unit so that power from the remaining battery groups (second battery group BG2 and third battery group BG3) is supplied to the specific electrical device ( Battery discharge test step, see FIG. 6).

  After the engine 3 is started, the control unit 8 controls each switch of the switching unit (battery discharge) so that the power from all the battery groups is supplied to the specific electric device during the first time t1. Test step, see FIG. 7).

  This is performed for the purpose of testing whether or not the battery group can maintain the power supply to the specific electric device after the engine 3 is started at the time of a power failure until the generator 4 is in a steady operation state.

  The first time t1 is set to a time (for example, 40 seconds) required from the start of the engine 3 until the generator 4 enters a steady operation state.

  After the first time t1 has elapsed from the start of the engine 3, the control unit 8 controls each switch of the switching unit so that power from all the battery groups is supplied to the discharge circuit 55 ( (See FIG. 8).

In order to perform a load test of the generator 4 after the discharge is completed, the power supply from the battery group to the discharge circuit 55 is stopped, and the power from the generator 4 is controlled to be supplied to all the battery groups. The unit 8 controls each switch of the switching unit (load test step, see FIG. 9).
However, the load amount adjustment switch 7b is used for the first switch S11 to the thirteenth switch S13 of the first switch group SW so that the user can select the battery group to be supplied with power from the generator 4 for adjusting the load amount. On / off control is performed in accordance with the operation state of the first switch 7b1, the second switch 7b2, and the third switch 7b3.
The completion of discharge here means not a state where all the battery groups are completely discharged, but a state where power that can drive the control unit 8 and each switch of the switching unit is left.

  The first relay 9a is connected to a power line (R-phase line Lr, S-phase line Ls, T-phase line Lt) of a commercial power source, and is applied to an electric device through a current flowing through the power line of the commercial power source or the power line. Sense voltage.

When the current value or voltage value detected by the first relay 91a is outside a predetermined range (for example, the voltage value is lower than the predetermined value), the first relay 9a supplies power from a commercial power source such as a power failure. Therefore, a predetermined signal is transmitted to the control unit 8, and the control unit 8 controls each switch of the switching unit.
Moreover, it may replace with the 1st relay 9a, the measuring device which detects a voltage or an electric current, the form which transmits the information regarding the said voltage or the said electric current to the control part 8, and makes it display on the display part 7c may be sufficient.

  The second relay 9b is connected to the power line of the generator 4 and detects a current flowing through the power line of the generator 4 or a voltage applied to a specific electric device or the like via the power line.

When the current value or voltage value detected by the second relay 9b is outside a predetermined range (for example, the voltage value is higher than the predetermined value), the second relay 9b is supplied with power from the generator 4. A predetermined signal is transmitted to the control unit 8 as being possible (in a steady operation state), and the control unit 8 controls each switch of the switching unit.
Further, instead of the second relay 9b, a measuring instrument for detecting voltage or current is provided, information on the voltage or current is transmitted to the control unit 8, and the display unit 7c is used during a load test of the generator 4 or the like. It may be a form to be displayed.

Specifically, in the state shown in FIGS. 1 and 6, when power supply from the commercial power supply is disabled, the generator 4 is not operating yet, and power is supplied from the generator 4 to the specific electrical device. Is not enough.
Therefore, in order to start the engine 3, electric power from a part of the battery group (first battery group BG1) is supplied to the cell motor 5, and the remaining battery groups (second battery group BG2, third battery group). The control unit 8 controls each switch of the switching unit so that the electric power from BG3) is supplied to the specific electrical device (see FIG. 3).

7 to 9, when power supply from the commercial power supply is disabled, the generator 4 is in a steady operation state, and the power supply from the generator 4 to the specific electrical device is sufficient. I can do it.
For this reason, the control part 8 controls each switch of a switching part so that the electric power from the generator 4 may be supplied to a specific electric equipment (refer FIG. 5).

  The first resistor unit 10a to the third resistor unit 10c of the resistor unit 10 include a first switch unit SWC1 and a first switch group SW1 (single pole single throw type eleventh switch S11, twelfth switch S12, and thirteenth switch S13). Are connected in parallel with the commercial power source and the generator 4.

  The first switch group SW1 is used for switching one of the first resistance unit 10a to the third resistance unit 10c that is connected to the commercial power source or the generator 4.

  The first resistor unit 10a to the third resistor unit 10c include a second switch group SW2 (single pole double throw type 21st switch S21, single pole single throw type 22nd switch S22 and 23rd switch S23), Three switches SW3 (single pole double throw type 31st switch S31, 32nd switch S32 and 33rd switch S33) are connected to a specific electric device or discharge circuit 55 in series or alone via an inverter 51.

  The second switch group SW2 and the third switch group SW3 are connected to the cell motor 5 among the first battery group BG1 to the third battery group BG3 provided in each of the first resistance unit 10a to the third resistance unit 10c. Used to switch between those connected to the specific electrical equipment or the discharge circuit 55.

The first resistance unit 10a includes a first AC / DC converter 11a, a first charging circuit 13a, and a first battery group BG1.
The first AC / DC converter 11a is connected to the U-phase line Lu through the eleventh switch S11, and is connected to the V-phase line Lv, and from the commercial power supply or the generator 4 via the U-phase line Lu and the V-phase line Lv. The type of electricity is converted from alternating current to direct current.
The first battery group BG1 includes one or more secondary batteries, and accumulates electric power supplied from a commercial power source or the generator 4 via the first AC / DC converter 11a and the first charging circuit 13a. When accumulating, the resistance of the first AC / DC converter 11a, the first charging circuit 13a, and the first battery group BG1 is utilized as a load test load of the generator 4.
The first resistance unit 10a is provided with a device for measuring the charging voltage or the charging current of the first battery group BG1 in order to detect the charging state of the first battery group BG1, and when the first battery group BG1 is fully charged. It is desirable to perform control to cut off the power supply to the first resistance unit 10a via the first charging circuit 13a.

The second resistance unit 10b includes a second AC / DC converter 11b, a second charging circuit 13b, and a second battery group BG2.
The second AC / DC converter 11b is connected to the W-phase line Lw via the twelfth switch S12, and is connected to the U-phase line Lu. From the commercial power supply or the generator 4, the W-phase line Lw and the U-phase line Lu are connected. The type of electricity is converted from alternating current to direct current.
The second battery group BG2 includes one or more secondary batteries, and accumulates power supplied from the commercial power source or the generator 4 via the second AC / DC converter 11b and the second charging circuit 13b. The resistance of the second AC / DC converter 11b, the second charging circuit 13b, and the second battery group BG2 during storage is used as a load test load of the generator 4.
The second resistance unit 10b is provided with a device for measuring the charging voltage or charging current of the second battery group BG2 in order to detect the charging state of the second battery group BG2, and when the second battery group BG2 is fully charged. It is desirable to perform control to cut off the power supply to the second resistance unit 10b via the second charging circuit 13b.

The third resistance unit 10c includes a third AC / DC converter 11c, a third charging circuit 13c, and a third battery group BG3.
The third AC / DC converter 11c is connected to the V-phase line Lv through the thirteenth switch S13, and is connected to the W-phase line Lw, and from the commercial power supply or the generator 4 via the V-phase line Lv and the W-phase line Lw. The type of electricity is converted from alternating current to direct current.
The third battery group BG3 includes one or more secondary batteries, and accumulates electric power supplied from the commercial power supply or the generator 4 via the third AC / DC converter 11c and the third charging circuit 13c. When accumulating, the resistance of the third AC / DC converter 11c, the third charging circuit 13c, and the third battery group BG3 is utilized as a load test load of the generator 4.
The third resistance unit 10c is provided with a device for measuring the charging voltage or charging current of the third battery group BG3 in order to detect the charging state of the third battery group BG3. When the third battery group BG3 is fully charged, It is desirable to perform control to cut off the power supply to the third resistance unit 10c via the third charging circuit 13c.

  Further, in order to cool the AC / DC converter, the charging circuit, and the battery group of each of the first resistance unit 10a to the third resistance unit 10c, it is desirable to provide a cooling fan in the vicinity thereof.

  It is desirable that each charging circuit of the first resistance unit 10a to the third resistance unit 10c is of a quick charging type so that charging of the secondary battery can be completed within the time of the load test.

  In the present embodiment, each of the first battery group BG1 to the third battery group BG3 has two 12V secondary batteries and is connected in series, and each of the first resistance unit 10a to the third resistance unit 10c An example in which a battery group, an AC / DC converter, and a charging circuit constitute a resistor group having a rated capacity of 2 kW is shown. However, the number of secondary batteries and the value of the rated capacity are not limited to this.

  Moreover, although the resistance part 10 shows the form comprised by three resistance units (the 1st resistance unit 10a-the 3rd resistance unit 10c), at least 2 resistance units should just be provided for a load test, and four or more It may be a form in which the resistance unit is provided.

  Further, for each of the resistance units, it is desirable to provide a backflow prevention device (not shown) such as a diode between the charging circuit and the battery group in order to prevent discharge (backflow) from the battery group to the charging circuit.

  Further, a description will be given of a mode in which the first switch group SW1 (the eleventh switch S11 to the thirteenth switch S13) is provided between the U-phase line Lu, the V-phase line Lv, the W-phase line Lw, and the AC / DC converter of the resistance unit. However, a form provided between the charging circuit of the resistance unit and the battery group may be employed. In this case, the first switch group SW1 also serves as a backflow prevention device.

Next, the connection form of the battery group and each switch will be described.
One terminal (+ terminal) of the first battery group BG1 is connected to one terminal of the first charging circuit 13a and a common terminal (movable contact) of the 21st switch S21.
One terminal (+ terminal) of the second battery group BG2 is connected to one terminal of the second charging circuit 13b and one terminal (for example, a fixed contact) of the 22nd switch S22.
One terminal (+ terminal) of the third battery group BG3 is connected to one terminal of the third charging circuit 13c and one terminal (for example, a fixed contact) of the 23rd switch S23.

The other terminal (-terminal) of the first battery group BG1 is connected to one terminal of the cell motor 5, the other terminal of the first charging circuit 13a, and one of the terminals of the 31st switch S31 (normally closed contact). .
The other terminal (− terminal) of the second battery group BG2 is connected to the other terminal of the second charging circuit 13b and one of the terminals of the 32nd switch S32 (normally closed contact).
The other terminal (-terminal) of the third battery group BG3 is connected to the other terminal of the third charging circuit 13c and one of the terminals of the 33rd switch S33 (normally closed contact).

  One terminal (normally closed contact) of the 31st switch 31 is connected to the other terminal (−terminal) of the first battery group BG1, and the other terminal (always open contact) of the 31st switch S31 is connected to the 21st switch. One of the terminals of S21 (normally closed contact) and the inverter 51 are connected, and the common terminal (movable contact) of the 31st switch S31 is the other of the terminals of the 22nd switch S22 (for example, the movable contact) and of the 32nd switch S32. Connected to the other terminal (normally open contact).

  One terminal (normally closed contact) of the 32nd switch S32 is connected to the other terminal (-terminal) of the second battery group BG2, and the other terminal (normally open contact) of the 32nd switch S32 is connected to the 22nd switch. The other terminal (for example, movable contact) of S22 is connected to the common terminal of the 31st switch S31 and the common terminal (movable contact) of the 32nd switch S32 is the other terminal (for example, movable contact) of the 23rd switch S23. And the other terminal (normally open contact) of the 33rd switch S33.

  One terminal (normally closed contact) of the 33rd switch S33 is connected to the other terminal (−terminal) of the third battery group BG3, and the other terminal (always open contact) of the 33rd switch S33 is connected to the 23rd switch. The other terminal of S23 (for example, a movable contact) is connected to the common terminal of the thirty-second switch S32, and the common terminal (movable contact) of the thirty-third switch S33 is connected to the inverter 51.

  The other terminal (normally open contact) of the 21st switch S <b> 21 is connected to the other terminal of the cell motor 5.

  The first switch unit SWC1 has three single-pole double-throw switches that operate in conjunction with each other, and controls the supply of power to the battery group or the specific electric device between the commercial power source and the generator 4. Used for.

Of the three switches constituting the first switch unit SWC1, one in which the common terminal (movable contact) is connected to the U-phase line Lu is one of the terminals (for example, the normally open contact) is connected to the power line from the commercial power source. Connected to R-phase line Lr, the other terminal (for example, normally closed contact) is connected to a power line from U-phase terminal UT of generator 4.
Of the three switches constituting the first switch unit SWC1, one in which the common terminal (movable contact) is connected to the V-phase line Lv has one of the terminals (for example, a normally open contact) connected to the power line from the commercial power supply. It is connected to S phase line Ls, and the other terminal (for example, normally closed contact) is connected to a power line from V phase terminal VT of generator 4.
Of the three switches constituting the first switch unit SWC1, one in which the common terminal (movable contact) is connected to the W-phase line Lw is such that one of the terminals (for example, the normally open contact) is the T of the power line from the commercial power source. It is connected to phase line Lt, and the other terminal (for example, normally closed contact) is connected to a power line from W phase terminal WT of generator 4.

The second switch unit SWC2 has three single-pole double-throw switches that operate in conjunction with each other, and is used to switch and control the power supply source to the specific electric device between the generator 4 and the battery group. The
In each of the three switches constituting the second switch unit SWC2, one of the terminals (for example, a normally closed contact) is connected to a power line (U-phase line Lu, V-phase line Lv, W-phase line w) from the generator 4. The other terminal (for example, normally open contact) is connected to the power line from one of the terminals of each of the three switches (for example, normally closed contact) constituting the third switch unit SWC3, and the common terminal (movable contact) is Connected with specific electrical equipment.

The third switch unit SWC3 has three single-pole double-throw switches that operate in conjunction with each other, and is used to switch and control the supply destination of power from the battery group between the specific electrical device and the discharge circuit 55. The
The three switches constituting the third switch unit SWC3 have one terminal (for example, a normally closed contact), and the other one of the terminals of each of the three switches that constitute the second switch unit SWC2 (for example, a normally open contact). The other terminal (for example, normally open contact) is connected to the power line from the discharge circuit 55, and the common terminal (movable contact) is connected to the power line from the inverter 51.

  The inverter 51 converts the type of electricity from direct current to alternating current with respect to the electric power supplied from the first battery group BG1 to the third battery group BG3, and supplies the alternating current power to the specific electrical device or the discharge circuit 55 in the subsequent stage.

The third relay 53 is provided between the inverter 51 and the third switch unit SWC3 and is connected to a power line from the inverter 51 to the specific electrical device or the discharge circuit 55, and is specified via the current flowing through the power line or the power line. A voltage applied to the electric device or the discharge circuit 55 is detected.
When the current value or the voltage value detected by the third relay 53 is outside a predetermined range (for example, the voltage value is lower than the predetermined value), the third relay 53 is connected to the first battery group BG1 to the third battery group BG1 to the third battery group BG1. When the discharge of the battery group BG3 is completed, the control unit transmits a predetermined signal to the control unit 8 and performs a load test on the generator 4 so that the power from the generator 4 is supplied to the battery group. 8 controls each switch of the switching 15 (see FIG. 9).
Further, instead of the third relay 53, a measuring instrument for detecting a voltage or current is provided, information on the voltage or current is transmitted to the control unit 8, and the display unit 7c is displayed during a discharge test of the battery group. The form to display may be sufficient.

The discharge circuit 55 has a load (electrical member) that consumes power supplied from the battery group, such as a resistor, and is used for discharging the battery group.
Compared to the case where the battery group is connected to the specific electrical device, the discharge circuit 55 has a load larger than the power consumption of the specific electrical device connected to the power generation system 1 in order to expedite the discharge of the battery group.

  Even when the power supply from the commercial power source becomes impossible by the power generation system 1 in which the power generator 4 for supplying power to the specific electric device and the battery group are integrated, the power is smoothly supplied from the battery or the power generator 4. It is possible to drive specific electrical equipment with high power.

In the present embodiment, a plurality of resistance units including a battery group are provided in parallel, and the load test of the generator 4 can be performed by switching the connection state between the plurality of resistance units and the generator 4.
In addition, since power is supplied from the battery group to the specific electrical device before that, the battery group supplies power to the specific electrical device after the engine 3 is started in the event of a power failure until the generator 4 is in steady operation. Can be maintained (discharge test).
At the time of the discharge test, the engine 3 is started using the cell motor 5 and power is generated by the generator 4 (a discharge test or the like is performed while the generator 4 is generating power). Even if a power failure occurs during the load test, it is possible to instantaneously switch to power supply from the generator 4 to the specific electrical device.

After the discharge test is completed, the power supply from the battery group to the specific electrical device is switched to the power supply from the battery group to the discharge circuit 55.
By switching to the power supply to the discharge circuit 55 that consumes a large amount of power, the discharge time of the battery group can be shortened, and the use of specific electrical equipment can be minimized.

  In the present embodiment, the form in which the type of electricity supplied from a commercial power source or the like is a three-phase alternating current has been described. However, a form that is a single-phase alternating current may be used (see FIG. 10).

The power supply to the cell motor 5 may be performed by the first battery group BG1 alone, but may be performed by all of the first battery group BG1 to the third battery group BG3 (FIG. 11).
In this case, the cell motor 5 and the inverter 51 are connected in parallel to the first battery group BG1 to the third battery group BG3, and a single pole is used for on / off control of power supply to the cell motor 5. A single throw type 41st switch S41 is provided. The twenty-first switch S21 is replaced from a single pole double throw type to a single pole single throw type.

Further, the control of each switch of the switching 15 is not limited to that by the control unit 8.
For example, a mode in which each switch is controlled without using the control unit 8 based on the output signals from the first relay 9a, the second relay 9b, and the third relay 53 and the operation state of the operation unit 7 can be considered. .

  Specifically, the operating state of each switch will be described.

The first switch unit SWC1 operates based on the output signal from the first relay 9a and the operation state of the mode switch 7a.
When the “normal mode” is set and power is supplied from the commercial power source, the movable contact of the first switch unit SWC1 is connected to the commercial power source in the ON state (see FIG. 1).
When the “normal mode” is set and no power is supplied from the commercial power supply, the movable contact of the first switch unit SWC1 is connected to the generator 4 in the off state (see FIGS. 3 to 5).
When the “test mode” is set, the movable contact of the first switch unit SWC1 is connected to the generator 4 in the off state (see FIGS. 6 to 9).

The second switch unit SWC2 operates based on the output signals from the first relay 9a and the second relay 9b and the operation state of the mode switch 7a.
When “normal mode” is set and power is supplied from a commercial power supply, the movable contact of the second switch unit SWC2 is connected to the first switch unit SWC1 (generator 4 side) in the off state (FIG. 1). reference).
When the “normal mode” is set and no power is supplied from the commercial power supply, the movable contact of the second switch unit SWC2 is in the ON state until the generator 4 enters the steady operation state, and the third switch unit SWC3 ( After the generator 4 is in a steady operation state, the movable contact of the second switch unit SWC2 is in the off state and the first switch unit SWC1 (generator) is connected to the inverter 51 side (see FIGS. 3 and 4). 4 side) (see FIG. 5).
When the “test mode” is set, the movable contact of the second switch unit SWC2 is connected to the third switch unit SWC3 (inverter 51 side) in the ON state (see FIGS. 6 to 9).

However, the second switch unit SWC2 may have a built-in timer that measures the first time t1, and may operate based on the output signal from the first relay 9a and the operation state of the mode switch 7a.
When “normal mode” is set and power is supplied from a commercial power supply, the movable contact of the second switch unit SWC2 is connected to the first switch unit SWC1 (generator 4 side) in the off state (FIG. 1). reference).
When “normal mode” is set and no power is supplied from the commercial power supply, the movable contact of the second switch unit SWC2 remains in the ON state until the first time t1 has elapsed since the start of the engine 3. After the first time t1 has elapsed after being connected to the part SWC3 (inverter 51 side) and the first time t1 has elapsed, the movable contact of the second switch part SWC2 is in the off state and the first switch part SWC1 (generator 4 side) (see FIG. 5).
When the “test mode” is set, the movable contact of the second switch unit SWC2 is connected to the third switch unit SWC3 (inverter 51 side) in the ON state (see FIGS. 6 to 9).

The third switch unit SWC3 includes a timer for measuring the first time t1, and operates based on an output signal from the third relay 53 and an operation state of the mode switch 7a.
When the “normal mode” is set, the movable contact of the third switch unit SWC3 is connected to the second switch unit SWC2 (specific electric device side) in the off state (see FIGS. 1 and 3 to 5). .
When the “test mode” is set, the movable contact of the third switch unit SWC3 is in the OFF state until the first time t1 has elapsed from the start of the engine 3, and the second switch unit SWC2 (specific electric device side). (See FIGS. 6 and 7), and after the first time t1 has elapsed and until the discharge of the battery group is completed, the movable contact of the third switch unit SWC3 is in the ON state and the discharge circuit 55 (See FIG. 8), after the discharge of the battery group is completed, the movable contact of the third switch unit SWC3 is connected to the second switch unit SWC2 (specific electrical device side) in the off state (FIG. 9). reference).

The first switch group SW1 (the eleventh switch S11 to the thirteenth switch S13) operates based on the output signal from the third relay 53 and the operation state of the mode switch 7a and the load amount adjustment switch 7b.
When the “normal mode” is set and power is supplied from a commercial power source, each of the first switch groups SW1 is turned on (closed state) (see FIG. 1).
When the “normal mode” is set and no power is supplied from the commercial power supply, each of the first switch groups SW1 is turned off (opened state) (see FIGS. 3 to 5).
The first switch group SW1 is turned off (opened state) until the battery group is completely discharged after being set to the “test mode” (see FIGS. 6 to 8), and the battery group is completely discharged. Thereafter, the eleventh switch S11 is on / off controlled in accordance with the operating state of the first switch 7b1, the twelfth switch S12 is on / off controlled in accordance with the operating state of the second switch 7b2, and the thirteenth switch S13 is The on / off control is performed according to the operation state of the 3 switch 7bc (see FIG. 9).

The 21st switch S21 of the second switch group SW2 has a built-in timer for measuring the second time t2, and operates based on the output signal from the first relay 9a and the operation state of the mode switch 7a.
The second time t2 is set to a time (for example, 2 seconds) required until the engine 3 is started by operating the cell motor 5.
When the “normal mode” is set and power is supplied from a commercial power source, the movable contact of the twenty-first switch S21 is connected to the inverter 51 in the off state (see FIG. 1).
When “normal mode” is set and no power is supplied from the trademark power source, the movable contact of the 21st switch S21 remains in the ON state until the second time t2 elapses after the cell motor 5 is operated. After the second time t2 has elapsed after being connected to the motor 5 (see FIG. 3), the movable contact of the twenty-first switch S21 is connected to the inverter 51 in the off state (see FIGS. 4 and 5).
The movable contact of the 21st switch S21 is connected to the cell motor 5 in the ON state until the second time t2 has elapsed after the cell motor 5 is operated after being set to the “test mode” (see FIG. 6). After the second time t2 has elapsed, the movable contact of the twenty-first switch S21 is connected to the inverter 51 in the off state (see FIGS. 7 to 9).

The 22nd switch S22 and the 23rd switch S23 of the second switch group SW2 operate based on the output signals from the first relay 9a, the second relay 9b, and the third relay 53 and the operation state of the mode switch 7a.
When the “normal mode” is set and power is supplied from the commercial power supply, the 22nd switch S22 and the 23rd switch S23 are turned off (opened state) (see FIG. 1).
When the “normal mode” is set and no power is supplied from the commercial power supply, the 22nd switch S22 and the 23rd switch S23 are kept in the on state (closed state) until the generator 4 enters the steady operation state. After the generator 4 is in a steady operation state (see FIGS. 3 and 4), the 22nd switch S22 and the 23rd switch S23 are turned off (open circuit state) (see FIG. 5).
When the “test mode” is set, the 22nd switch S22 and the 23rd switch S23 are turned on (closed state) until the discharge of the battery group is completed (see FIGS. 6 to 8), and the battery After the discharge of the group is completed, the 22nd switch S22 and the 23rd switch S23 are turned off (open circuit state) (see FIG. 9).

However, the 22nd switch S22 and the 23rd switch S23 of the second switch group SW2 incorporate a timer for measuring the first time t1, and output signals from the first relay 9a and the third relay 53 and the operation of the mode switch 7a. It may be configured to operate based on the state.
When the “normal mode” is set and power is supplied from the commercial power supply, the 22nd switch S22 and the 23rd switch S23 are turned off (opened state) (see FIG. 1).
When the “normal mode” is set and no power is supplied from the commercial power source, the 22nd switch S22 and the 23rd switch S23 are in the on state (closed state) until the first time t1 has elapsed from the start of the engine 3. After the first time t1 has elapsed, the twenty-second switch S22 and the twenty-third switch S23 are turned off (opened state) (see FIG. 5).
When the “test mode” is set, the 22nd switch S22 and the 23rd switch S23 are turned on (closed state) until the discharge of the battery group is completed (see FIGS. 6 to 8), and the battery After the discharge of the group is completed, the 22nd switch S22 and the 23rd switch S23 are turned off (open circuit state) (see FIG. 9).

The 31st switch S31 of the third switch group SW3 incorporates a timer for measuring the second time t2, and operates based on the output signal from the first relay 9a and the operation state of the mode switch 7a.
When the “normal mode” is set and power is supplied from a commercial power supply, the movable contact of the 31st switch S31 is connected to the other terminal (−terminal) of the first battery group BG1 in the off state (see FIG. 1).
When “normal mode” is set and no power is supplied from the commercial power supply, the movable contact of the 31st switch S31 is connected to the inverter 51 until the second time t2 has elapsed after the cell motor 5 is operated. After the second time t2 has elapsed (see FIG. 3), the movable contact of the 31st switch S31 is connected to the other terminal (− terminal) of the first battery group BG1 (see FIGS. 4 and 5). ).
When the “test mode” is set, the movable contact of the 31st switch S31 is connected to the inverter 51 (see FIG. 6) until the second time t2 elapses after the cell motor 5 is operated. After the elapse of 2 hours t2, the movable contact of the 31st switch S31 is connected to the other terminal (−terminal) of the first battery group BG1 (see FIGS. 7 to 9).

  The movable contact of the thirty-second switch S32 of the third switch group SW3 is connected to the other terminal (− terminal) of the second battery BG2 in either “normal mode” or “test mode” (FIGS. 1, 3 to 9). The movable contact of the 32nd switch S32 is changed to the 31st switch when changing the connection condition of the battery group in the inspection or the like (for example, changing from the series connection of a plurality of battery groups to the single use of the third battery group BG3). 31 (inverter 51 side).

  The movable contact of the 33rd switch S33 of the third switch group SW3 is connected to the other terminal (−terminal) of the third battery BG3 in the “normal mode” or the “test mode” (FIGS. 1, 3 to 3). 9), when the connection condition of the battery group is changed by inspection or the like (for example, changing from the series connection of a plurality of battery groups to the single use of the second battery group BG2), the movable contact of the 33rd switch S33 is the 32nd switch. Connected to the switch S32 (inverter 51 side).

DESCRIPTION OF SYMBOLS 1 Power generation system 3 Engine 4 Generator 5 Cell motor 7 Operation part 7a Mode switch 7b Load amount adjustment switch 7b1-7b3 First switch-3rd switch 7c Display part 8 Control part 9a, 9b 1st relay, 2nd relay 10 Resistance Part 10a-10c 1st resistance unit-3rd resistance unit 11a-11c 1st AC / DC converter-3rd AC / DC converter 13a-13c 1st charging circuit-3rd charging circuit 51 Inverter 53 3rd relay 55 Discharge circuit BG1- BG3 1st battery group to 3rd battery group Lr R phase line of power line from commercial power supply Ls S phase line of power line from commercial power supply Lt T phase line of power line from commercial power supply Lu U phase line Lv V phase line Lw W Phase wire S11-S13 11th switch-13th switch S21-S23 21st Switch to 23rd switch S31 to S33 31st switch to 33rd switch S41 41st switch SW1 to SW3 1st switch group to 3rd switch group SWC1 to SWC3 1st switch part to 3rd switch part UT U phase terminal of generator VT generator V-phase terminal WT generator W-phase terminal

Claims (5)

Engine,
A generator that generates power based on the output of the engine and is connected to an external specific electrical device;
A resistance portion having a plurality of resistance units;
An inverter,
An operation unit used to switch between the normal mode and the test mode;
A first switch part;
A power generation system including a second switch unit,
The plurality of resistance units are connected in parallel to the generator,
Each of the plurality of resistance units has a battery and a charging circuit provided between the battery and the generator,
The first switch unit is used to switch and control a power supply source to the battery of the resistance unit or the specific electrical device between a commercial power source and the generator,
The second switch unit is used to switch and control a power supply source to the specific electrical device between the generator and a battery of the resistance unit via the inverter.
When power supply from the commercial power source to the specific electrical device is disabled in the state set to the normal mode via the operation unit, until the first time elapses after starting the engine Or until the generator is in a steady operation state, the power from the battery is supplied to the specific electrical device via the inverter and the second switch unit,
When the test mode is set via the operation unit, the battery is discharged from the battery via the inverter and the second switch unit for a discharge test of the battery while the generator is generating power. Power is supplied to the specific electrical device, and then the power supply from the battery to the specific electrical device is stopped for the load test of the generator, and from the generator via the first switch unit Power is supplied to at least one of the plurality of batteries. A discharge circuit having a load that consumes more power than the specific electrical equipment connected to the power generation system;
A third switch part,
The third switch unit is used to switch and control a supply destination of power from the battery via the inverter between the specific electrical device and the discharge circuit,
When the test mode is set through the operation unit, the inverter, the third switch unit, and the second switch unit are used for a discharge test of the battery while the generator is generating power. Power from the battery is supplied to the specific electrical device via
After the first time has elapsed and before the load test of the generator, power from the battery is supplied to the discharge circuit via the inverter and the third switch unit,
During the load test, power supply from the battery to the discharge circuit is stopped, and power from the generator is supplied to at least one of the plurality of batteries via the first switch unit. The power generation system according to claim 1. A relay is provided between the inverter and the third switch unit,
When the voltage or current detected by the relay falls below a threshold value, the power supply from the battery to the discharge circuit via the inverter and the third switch unit is supplied from the generator via the first switch unit. The power generation system according to claim 2, wherein the power generation system is switched to power supply to at least one of the batteries. The normally closed contact of the first switch part connected to the movable contact of the first switch part when the current is not flowing through the relay coil of the first switch part is connected to the power line from the generator,
The normally closed contact of the second switch part connected to the movable contact of the second switch part when the current is not flowing through the relay coil of the second switch part is the power generation via the first switch part. The power generation system according to claim 1, wherein the power generation system is connected to a power line from a machine or the commercial power source. In order to switch between an engine, a power generator based on the output of the engine, a generator connected to an external specific electrical device, a resistance unit having a plurality of resistance units, an inverter, and a normal mode and a test mode A generator load test method in a power generation system including an operation unit, a first switch unit, and a second switch unit to be used,
The plurality of resistance units are connected in parallel to the generator,
Each of the plurality of resistance units has a battery and a charging circuit provided between the battery and the generator,
The first switch unit is used to switch and control a power supply source to the battery of the resistance unit or the specific electrical device between a commercial power source and the generator,
The second switch unit is used to switch and control a power supply source to the specific electrical device between the generator and a battery of a resistance unit via the inverter,
When power supply from the commercial power source to the specific electrical device is disabled in the state set to the normal mode via the operation unit, until the first time elapses after starting the engine Or until the generator is in a steady operation state, the power from the battery is supplied to the specific electrical device via the inverter and the second switch unit,
Battery discharge in which electric power from the battery is supplied to the specific electrical device through the inverter and the second switch unit in a state where the test mode is set through the operation unit and the generator is generating power. Testing steps;
After the battery discharge test step, power supply from the battery to the specific electrical device is stopped, and power from the generator is supplied to at least one of the plurality of batteries via the first switch unit. And a load test method.

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