JP2019198203A - Full load type distribution board and power storage system compatible with the same - Google Patents

Abstract

To automatically switch between a system output and a self-supported output while preventing an abnormal behavior of a power storage system accompanying switching from the system output to the self-supported output.SOLUTION: The power storage system's full load type distribution board includes a switching switch for automatically switching to a self-supported output or a system output from a power storage unit on the basis of conditions of power supplied to a general distribution board connected to a load. When commercial power is switched from a normal state to a power failure state, the switching switch automatically switches power supplied to the general distribution board from the commercial power to a self-supported output from the power storage unit by being triggered by changes in a storage voltage output from the power storage unit.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a full load compatible distribution board and a power storage system corresponding to the full load compatible distribution board.

  Conventionally, when a power system that is fed to a distribution board fails, it is impossible to supply power to a load connected to the distribution board. However, when an auxiliary power supply device such as a solar power generation device is connected to the distribution board, a technology is known that allows power supply to be continued for important loads such as emergency lights, refrigerators, and network equipment. (For example, refer to Patent Document 1).

  In recent years, a distribution board that automatically switches between commercial power and emergency power during a power failure is also known (see, for example, Non-Patent Document 1).

JP 2017-108482 A

Internet <URL: http://www.nito.co.jp/catalog/pdf/SP-617.pdf>

However, when automatically switching between commercial power and emergency power at the time of a power failure, depending on the state of commercial power and emergency power, there is a risk of causing malfunctions such as a load due to a collision of power supply voltages.
In particular, when power is supplied through single-phase three-wires, the single-phase three-wires must be switched at the same time. If the three-wires do not switch at the same time for some reason, there is a risk of power supply voltage collisions. Sex was great.

  In addition, when automatically switching from commercial power to emergency power, there is a problem that the operation of the switching switch becomes unstable depending on the rising state of the power supply voltage of the emergency power.

  Therefore, the present invention has been made in view of the above-described problems, and prevents abnormal behavior of the power storage system associated with switching from commercial power to emergency power, and between commercial power and emergency power. It is an object of the present invention to provide a full load compatible distribution board corresponding to a full load compatible distribution board that automatically switches and a power storage system using the full load compatible distribution board.

  Form 1: One or more embodiments of the present invention correspond to a full load compatible distribution board including a power storage unit, a full load compatible distribution board, and a general distribution board connected to the load. The power storage system, wherein the full load type distribution board includes a switching switch that automatically switches power supplied to the general distribution board to a self-sustained output or a system output based on a condition, and the switching opening / closing When the commercial power changes from the normal state to the power failure state, the power supply to the general distribution board is automatically changed from the grid output to the self-sustained output triggered by the change in the storage voltage output from the storage unit. Has proposed a power storage system compatible with a full-load distribution board characterized by switching to

  Mode 2; In one or more embodiments of the present invention, the power storage unit outputs a self-sustained output voltage as the power storage voltage after commercial power is changed from a normal state to a power failure state, and The panel automatically switches the power supplied to the general distribution board from the system output to the independent output by the switching switch when the independent output voltage exceeds a predetermined threshold voltage value. We are proposing a power storage system that supports a full-load distribution board.

  Mode 3; One or more embodiments of the present invention propose a power storage system corresponding to a full load type distribution board characterized in that the self-sustained output voltage output from the power storage unit rises in a slope shape is doing.

  Mode 4: In one or more embodiments of the present invention, the full load type distribution board includes an auxiliary relay between a self-sustained output of the switching switch and a neutral line, and the auxiliary relay includes the slope. When the self-sustained output voltage from the power storage unit that rises in a shape exceeds the threshold voltage value, it is turned on, and the switching switch automatically switches the power supplied to the general distribution board from the system output to the self-sustained output. Has proposed a power storage system compatible with a full-load distribution board characterized by switching to

  Mode 5: In one or more embodiments of the present invention, the full load type distribution board includes a control unit that controls an opening / closing operation of the switching switch, and the control unit has an independent output voltage of When it is determined that the threshold voltage value is exceeded, a power storage system corresponding to a full load type distribution board is proposed, in which a control for closing the switching switch is executed.

  Mode 6: One or more embodiments of the present invention include a switching switch that automatically switches the power supplied to the general distribution board to a self-sustained output or a system output based on conditions, and the switching switch A control unit that controls the operation, and the control unit controls the switching switch using a change in the storage voltage output from the storage unit as a trigger when the commercial power changes from a normal state to a power failure state. , A full-load type distribution board is proposed in which the power supplied to the general distribution board is switched from a system output to a self-sustained output.

  Mode 7: One or more embodiments of the present invention propose a full-load distribution board that further includes a main breaker provided between the switching switch and a commercial power system. ing.

  According to the present invention, it is possible to automatically switch between commercial power and emergency power while preventing abnormal behavior of the power storage system due to switching from commercial power to emergency power. is there.

It is a block diagram of the electrical storage system corresponding to the full load correspondence type distribution board which concerns on the 1st Embodiment of this invention. It is a block diagram of the control block in the full load correspondence type distribution board which concerns on the 1st Embodiment of this invention. It is a block diagram of the power conditioner in the electrical storage system corresponding to the full load correspondence type distribution board which concerns on the 1st Embodiment of this invention. It is a figure which shows the rising state of the output voltage of the electrical storage system corresponding to the full load correspondence type distribution board which concerns on the 1st Embodiment of this invention. It is the figure which showed the opening / closing state of each part voltage in the electrical storage system corresponding to the full load correspondence type distribution board which concerns on the 1st Embodiment of this invention, and an automatic switch. It is a figure which shows the opening / closing state of each part voltage and auxiliary relay in the electrical storage system corresponding to the full load correspondence type distribution board which concerns on the 1st Embodiment of this invention.

<Embodiment>
Hereinafter, the power storage system 10 corresponding to the full load type distribution board according to the present embodiment will be described with reference to FIGS. 1 to 6.

<Configuration of power storage system compatible with full load distribution board>
Hereinafter, the configuration of the power storage system 10 corresponding to the full load type distribution board according to the present embodiment will be described with reference to FIG. 1.
In the following, a self-sustained output is illustrated as an emergency power, and a power storage unit is illustrated and described as a main configuration of the self-sustained output.
In addition, the power storage system 10 corresponding to the full load type distribution board according to the present embodiment includes a hybrid power storage system (a solar power conditioner connected to a solar battery and a power storage power conditioner connected to a storage battery. Storage system), single-function storage system (storage system with separate solar power conditioner) and multi-function storage system (solar power conditioner connected to solar cell and storage power connected to storage battery) The power storage system is compatible with both a power storage system in which a conditioner and a charge / discharge power conditioner connected to an electric vehicle are integrated.

  As shown in FIG. 1, the power storage system 10 corresponding to the full load type distribution board according to the present embodiment includes a full load type distribution board 100, a power storage unit 200, and a general distribution board 300. It is configured to include.

The full load type distribution board 100 switches between the system output and the self-sustained output according to the conditions, and does not distinguish between the important load and the general load other than the important load via the general distribution board 300. Power is supplied efficiently and stably.
Here, the grid output includes only commercial power, or commercial power and power from a device linked to the commercial power.

The power storage unit 200 is connected to the system output via the power storage unit breaker 140, and includes, for example, a solar cell module 400 that generates power using renewable energy, an electric vehicle having a function of supplying power to the outside, a fuel cell vehicle, and the like. It is connected to an electric vehicle or the like.
Discharged power from the storage battery 230 and generated power of the solar cell module 400 can be supplied from the power storage unit 200 via the power storage unit breaker 140 as a system output.
Thereby, commercial power and / or output power from the power storage unit 200 can be supplied as a system output.

The power storage unit 200 converts, for example, direct current power generated by the solar cell module 400 or the like into alternating current power, or stores it in the storage battery 230, and converts direct current power stored in the storage battery 230 into alternating current power, so that the full load Supplied to the corresponding distribution board 100.
Moreover, the electrical storage unit 200 performs control etc. which charge the storage battery 230, for example using night commercial power. In addition, as the storage battery 230, a lithium ion battery etc. can be illustrated.

  The general distribution board 300 supplies the electric power supplied from the full load type distribution board 100 to household loads such as lighting, a refrigerator, and a washing machine.

  It is a household system that takes out hydrogen as fuel from city gas, LP gas, kerosene, etc. using a reformer, reacts with oxygen in the air to generate power, and uses the exhaust heat generated during power generation for hot water supply. A commercial grid interconnection device such as a fuel cell cogeneration system (for example, ENE-FARM (registered trademark)) is connected between the full load type distribution board 100 and the general distribution board 300 and is connected to the commercial grid interconnection. It is possible to supply power supplied from the device to the load.

<Configuration of distribution board for full load>
As shown in FIG. 1, the full load type distribution board 100 includes an automatic changeover switch (switching switch) 110, a control block 120, a main breaker 130, a storage unit breaker 140, and an operation mode switching breaker. 150.

  The automatic changeover switch 110 is a switch for switching between a system output and a self-sustained output, which is a supply source of power supplied to the load, via the general distribution board 300 based on the control of the control block 120.

The control block 120 controls the switching operation of the automatic selector switch 110.
FIG. 2 shows a configuration including an automatic changeover switch 110 and a control block 120.
As shown in FIG. 2, the control block 120 includes an auxiliary relay X1 (switch portion is XS1), an auxiliary relay X2 (switch portion is XS2), and a timer relay TLR1 (switch portion is TLRS1).
The auxiliary relay X1 is a contact b (normally closed contact), the auxiliary relay X2 is a contact (normally open contact), and the timer relay TLR1 is a contact (normally open contact).
In the figure, the auxiliary relay X1 and the timer relay TLR1 are provided between the system output (R1) and the neutral line (N1), and the auxiliary relay X2 is provided between the independent output (R2) and the neutral line (N2). ing.
The switch part XS1 of the auxiliary relay X1 is provided at one end of the self-sustained output (R2) and the switch part XS2 of the auxiliary relay X2.
The other end of the switch section XS2 of the auxiliary relay X2 is connected to the automatic changeover switch 110.
The switch section TLRS1 of the timer relay TLR1 is interposed between the system output (R1) and the automatic changeover switch 110.

Here, before the commercial power failure (commercial power interconnection), the timer relay TLR1 and the auxiliary relay X1 are excited, and the switch portion TLRS1 of the timer relay TLR1 is in a closed state.
Further, the switch part XS1 of the auxiliary relay X1 is in an open state, and the switch part XS2 of the auxiliary relay X2 is in an open state.
Therefore, the automatic selector switch 110 is switched to the system output side, and the system output is supplied to the load.
On the other hand, when the commercial power fails, the excitation of the timer relay TLR1 and the auxiliary relay X1 is released.
Thereby, the switch part TLRS1 of the timer relay TLR1 is opened, the switch part XS1 of the auxiliary relay X1 is closed, and the switch part XS2 of the auxiliary relay X2 remains open.
Thereafter, when a self-sustained output voltage is applied from the self-sustained output, the auxiliary relay X2 is excited, and the switch portion XS2 of the auxiliary relay X2 is closed.
Therefore, the automatic selector switch 110 is switched to the self-sustained output side, and power is supplied from the self-sustained output to the load.

Further, when the commercial power is restored, the auxiliary relay X1 is excited and the switch section XS1 of the auxiliary relay X1 is opened.
Then, the timer relay TLR1 operates as a trigger triggered by the rise of the commercial voltage, and the switch unit TLRS1 of the timer relay TLR1 is switched from the open state to the closed state after a predetermined time has elapsed.
Therefore, the automatic changeover switch 110 is switched to the system output side after a predetermined time has elapsed after the commercial power is restored, and the system output is supplied to the load.

  The main circuit breaker 130 is always supplied with commercial power and / or output power from the power storage unit 200. For example, the main circuit breaker 130 may be connected to a secondary circuit (load, electric circuit, etc.) due to leakage, overload, or short circuit. When an abnormal overcurrent flows, the main breaker 130 is activated to open the electric circuit.

  The power storage unit breaker 140 is always supplied with commercial power or output power from the power storage unit 200. For example, when an abnormality occurs in the power storage unit 200, the power storage unit breaker 140 is activated to Is released.

  The operation mode switching breaker 150 is used to open the electrical path between the power storage unit 200 and the load during maintenance of the power storage unit 200 or the like.

<Configuration of power storage unit>
As shown in FIG. 1, the power storage unit 200 includes a power conditioner 210, a storage battery 230, and a unit control unit 240.

For example, the power conditioner 210 converts DC power generated by renewable energy such as sunlight into a predetermined voltage by a converter, and then converts the DC power into AC power (inverter function).
Moreover, after converting the direct-current power (discharge power) from the storage battery 230 into a predetermined voltage by a converter, it is converted into alternating-current power.
In addition, it is possible to charge the storage battery 230 through the converter using commercial power converted from the generated power and / or DC power from the solar cell module 400 as charging power.
Further, the power conditioner 210 has a function of stabilizing the interconnection.
Therefore, the power conditioner 210 includes an inverter 211 and a grid interconnection protection device 212 as shown in FIG.
The following configuration is an example, and other configurations may be used as long as the same function can be achieved.

As shown in FIG. 3, the inverter 211 includes a power converter 211 </ b> A, a control device 211 </ b> B, and a protection device 211 </ b> C.
The power converter 211A converts DC power generated by renewable energy such as sunlight into AC power, and also converts DC power (discharge power) from the storage battery into AC power.
Moreover, in order to charge a storage battery, commercial power is converted into DC power.
The control device 211B controls the power converter 211A.
For example, when the input destination of the power converter 211A is a solar cell, the control device 211B has a function of always taking out the maximum power from the solar cell whose output fluctuates due to factors such as the amount of solar radiation, temperature, and load ( Maximum power point tracking function (MPPT) and a function that outputs a current that suppresses harmonic current (harmonic suppression function) to prevent adverse effects on system power, and when there is surplus power, A function for reversely flowing the generated power to the commercial power system (reverse flow control function) is executed.
The protection device 211C functions to protect the inverter 211 when an abnormality occurs.
Further, the operation of the inverter 211 is stopped by a signal from the grid interconnection protection device 212 described later.

The grid interconnection protection device 212 safely stops the system when an abnormality occurs on the commercial power system side such as a power failure.
The grid interconnection protection device 212 has, for example, a function for detecting an increase or a decrease in frequency, a function for detecting an overvoltage or an undervoltage, a function for detecting a power failure of commercial power, and a function for disconnecting the photovoltaic power generation system from the system.

As illustrated in FIG. 4, the control device 211 </ b> B causes the power converter 211 </ b> A to perform a soft switching operation, thereby increasing the output voltage from zero to a slope.
Thereby, the rush current to the motor apparatus etc. which are used for household loads, such as a washing machine and a vacuum cleaner, can be suppressed.

Unit control unit 240 controls the operation of power storage unit 200 as a whole according to a control program stored in a ROM (Read Only Memory) or the like.
In the present embodiment, control of the power conditioner 210 can be exemplified.

<Configuration of general distribution board>
As shown in FIG. 1, the general distribution board 300 includes a main breaker 310 and a branch breaker 320.

  The main breaker 310 is a breaker having a trip function, and is connected to the output of the full load type distribution board 100. For example, a secondary circuit (load, When an abnormal overcurrent flows through the electric circuit or the like, the main breaker 310 is activated to open the electric circuit.

  The branch breaker 320 has one end connected to the main breaker 310 and the other end connected to each household load, for example.

<Control processing of switching switch>
Hereinafter, the control processing of the automatic changeover switch 110 in the power storage system 10 corresponding to the full load type distribution board 100 according to the present embodiment will be described with reference to FIGS. 5 and 6.

[Operation when commercial power is switched from normal to power outage]
Before explaining the control process of the automatic changeover switch 110, a chart when the commercial power is changed from the normal state (at the time of commercial grid connection) to the power failure state will be explained using FIG.
When the commercial power is in a normal state, the system voltage of the commercial power is, for example, AC 100V (effective value). At this time, the storage voltage (load-side output voltage of the power conditioner 210) is AC100V (effective value).

When the commercial power is changed from the normal state to the power failure state, the system voltage of the commercial power becomes 0V (effective value), and accordingly, the storage voltage becomes 0V.
The unit control unit 240 of the power storage unit 200 shifts to a self-sustained operation mode in which power is supplied to the load after a predetermined time has elapsed (for example, 1.2 to 2 seconds) after the commercial power is in a power failure state. Then, a self-supporting output voltage (AC 100 V) based on the discharge power of the storage battery is output from the power conditioner 210.

Further, the full-load distribution board 100 automatically changes the power supply voltage supplied to the general distribution board 300 from the grid output to the self-sustained output from the power storage unit 200, triggered by the change in the storage voltage output from the power storage unit 200. Switch.
That is, the full load type distribution board 100 operates the automatic changeover switch 110 to “open” the system side main contact and “close” the power storage side main contact, thereby storing the power supply source for the load. The unit 200 side.

[Operation of power storage unit when commercial power goes from normal state to power outage]
Unit control unit 240 of power storage unit 200 monitors the commercial voltage of commercial power and detects a power failure of commercial power.
When the unit control unit 240 detects a power failure of commercial power, the unit control unit 240 continues monitoring for a predetermined time (for example, 2 seconds).
And the unit control part 240 determines with commercial power being in a power failure state, when it is judged that the power failure of commercial power is continuing even after predetermined time progress.

  When unit control unit 240 determines that the commercial power is in a power failure state, unit control unit 240 operates power conditioner 210.

  As shown in FIG. 4, the power conditioner 210 performs a soft switching operation of the power converter 211 </ b> A based on the control of the control device 211 </ b> B, and raises the storage voltage in a slope shape.

  That is, as shown in FIG. 4, the output voltage Vout of the power conditioner 210 increases in a slope shape.

[Operation of distribution board for full load when commercial power changes from normal to blackout]
When the control block 120 of the full load type distribution board 100 has the configuration shown in FIG. 2, the voltage value applied to the auxiliary relay X2 is sloped from 0 V (effective value) to AC 100 V (effective) as described above. Value).
Therefore, assuming that the auxiliary relay X2 is set to operate at the applied voltage AC80V (effective value), the output voltage Vout of the power conditioner 210 becomes AC80V (effective value) (Vth of the stored voltage in FIG. 6). Then, the contact 2-3 of the auxiliary relay X2 is closed (the auxiliary relay in FIG. 6 is switched from OFF to ON), and a voltage of AC 80 V (effective value) is supplied to the automatic selector switch 110 at once.
At this time, when a voltage of AC80V (effective value) is supplied to the automatic changeover switch 110 that is set to operate at an applied voltage AC80V (effective value), a coil (not shown) constituting the automatic changeover switch 110 is supplied. Is excited to switch the automatic selector switch 110 to the power storage side.
Further, the output voltage at this time (the load side voltage of the full load type distribution board 100) is as shown in FIG.

In addition, when the power failure state of the commercial power is resolved (when the commercial power is restored), the unit control unit 240 of the power storage unit 200 stops the independent operation, so that the power storage voltage is 0 V (effective value). Therefore, the excitation of the auxiliary relay X2 is released, and the switch section XS2 of the auxiliary relay X2 is opened (the contact 2-3 is opened).
In the full load type distribution board 100, the automatic changeover switch 110 is switched to the grid output side after a predetermined wait time (for example, 2 seconds) has elapsed since the return of commercial power.
Specifically, the timer of the timer relay TLR1 shown in FIG. 2 is triggered by the rise of the commercial voltage, and the switch portion TLRS1 of the timer relay TLR1 is closed (turned on) after a predetermined wait time has elapsed. Is closed.

As described above, according to the present embodiment, the full load compatible distribution board including the power storage unit 200, the full load compatible distribution board 100, and the general distribution board 300 connected to the load is provided. In the corresponding power storage system, the full load type distribution board 100 includes an automatic changeover switch 110 that automatically switches the power supplied to the general distribution board 300 to a self-sustained output or a system output based on a condition. The switch 110 automatically changes the power supplied to the general distribution board 300 from the grid output to the self-sustained output, triggered by the change in the storage voltage output from the storage unit 200 when the commercial power changes from the normal state to the power failure state. Switch.
That is, the full load type distribution board 100 is configured such that the storage voltage output from the storage unit 200 when the commercial power changes from the normal state to the power failure state, that is, when the commercial voltage becomes 0 V (effective value). With this change as a trigger, the power supplied to the general distribution board 300 is automatically switched from the system output to the self-sustained output.
On the other hand, the full-load distribution board 100 supplies the general distribution board 300 with the rise of the commercial voltage as a trigger when the power failure state of the commercial power is resolved, that is, when the commercial power is restored. Power can be automatically switched from a stand-alone output to a grid output.
Since the self-sustained output or the system output is a single-phase three-wire, there are three switch poles, but if the timing of switching for each pole shifts for some reason, it becomes an abnormal short circuit condition, excessive current flows, There is a possibility that the device is damaged or does not perform a desired operation.
On the other hand, according to the present embodiment, the automatic changeover switch 110 is switched in a state where either the system output or the self-sustained output is no voltage both at the time of power failure and at the time of power recovery. A collision between electric power (commercial power supply) and a self-sustained output (storage power supply) can be prevented, and an abnormal short-circuit state can be reliably avoided.
Therefore, there is an effect that it is possible to automatically switch between the system output and the self-sustained output while preventing the abnormal behavior of the power storage system due to the switch from the system output to the self-sustained output.

In addition, the power storage unit 200 outputs a self-sustained output voltage as a power storage voltage after the commercial power is changed from the normal state to the power failure state, and the full-load distribution board 100 sets the threshold voltage value determined by the self-supporting output voltage in advance. When it exceeds, the automatic changeover switch 110 automatically switches the power system supplied to the general distribution board 300 from the system output to the self-sustained output.
In this way, by switching the power supply triggered by the fact that the self-sustained output voltage exceeds a predetermined threshold voltage value, a collision between the commercial power (commercial power supply) and the self-sustained output (storage power supply) can be performed without taking any special measures. Can be prevented.
In other words, since the self-sustained output voltage is output after a predetermined time has elapsed after the commercial power is lost, either the system output or the self-sustained output is selectively supplied with no voltage.
For this reason, it can be avoided reliably that it will be in an abnormal short circuit state.
Further, according to the present embodiment, the full load type distribution board 100 includes the auxiliary relay X2 between the self-sustained output of the automatic changeover switch 110 and the neutral line, and the auxiliary relay X2 is a power storage unit 200 that rises in a slope shape. When the self-sustained output voltage from exceeds the threshold voltage value, it is turned on.
As a result, after the commercial power is changed from the normal state to the power failure state, the storage voltage of the storage unit 200 that rises in a slope shape rises sharply.
Therefore, an unstable operation of the coil constituting the automatic changeover switch 110 can be avoided.
In addition, since the automatic changeover switch 110 is automatically switched using the rise of the storage voltage output from the storage unit 200 as a trigger, the configuration is simpler than that in the case of switching control using the fall of the commercial voltage as a trigger, and The switching of the automatic selector switch 110 can be controlled at low cost.

Further, the full load type distribution board 100 includes a main breaker 130.
The general distribution board 300 also includes a main breaker 310. However, the full load compatible distribution panel 100 includes a main breaker 130 separately from the main breaker 310. It is possible to protect against an abnormal overcurrent flowing in the secondary circuit (load, electric circuit, etc.) due to factors such as load and short circuit.

In the embodiment described above, the switches, relays, and the like of the full-load distribution board 100 are configured with mechanical parts in mind, but it goes without saying that these can be configured with semiconductor switches.
Further, although the control block 120 is configured by hardware (FIG. 2), switching control of the automatic selector switch 110 may be executed by replacing the hardware configuration with software processing.

Further, the “computer system” includes a Web page providing environment (or display environment) if a WWW (World Wide Web) system is used.
The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium.
Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.

  The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  Although the embodiments and examples of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the embodiments or examples, and the scope of the present invention is not deviated. Design etc. are also included.

10; Power storage system corresponding to full load type distribution board 10A; Power storage system corresponding to full load type distribution board 100; Full load type distribution board 100A; Full load type distribution board 110; Automatic switching Switch (switching switch)
120; control block 120A; control block 130; main breaker 140; storage unit breaker 150; operation mode switching breaker 200; storage unit 210; power conditioner 211; inverter 212; grid interconnection protection device 230; storage battery 240; Control unit 300; General distribution board 310; Main breaker 320; Branch breaker 400; Solar cell module

Claims (7)

A power storage system corresponding to a full load compatible distribution board including a power storage unit, a full load compatible distribution board, and a general distribution board connected to the load,
The full load type distribution board is:
Based on conditions, the power to be supplied to the general distribution board comprises a switching switch that automatically switches to a stand-alone output or a grid output,
When the commercial power is changed from a normal state to a power failure state, the switching switch triggers the change in the storage voltage output from the storage unit as a trigger, and the power supplied to the general distribution panel is output independently from the system output. Power storage system compatible with full load distribution board, which automatically switches to The power storage unit outputs a self-sustained output voltage as the power storage voltage after the commercial power is changed from a normal state to a power failure state,
The full load type distribution board is:
2. The power supplied to the general distribution board by the switching switch is automatically switched from a system output to a self-sustained output when the self-sustained output voltage exceeds a predetermined threshold voltage value. Power storage system compatible with the full load type distribution board described in 1.   The power storage system according to claim 2, wherein the self-sustained output voltage output from the power storage unit rises in a slope shape. The full load type distribution board includes an auxiliary relay between the independent output of the switching switch and the neutral line,
The auxiliary relay is turned on when a self-sustained output voltage from the power storage unit that rises in a slope shape exceeds the threshold voltage value, and the power supplied to the general distribution board is supplied to the switching switch. 4. The power storage system corresponding to the full load type distribution board according to claim 3, wherein the output is automatically switched from the output to the self-supporting output. The full load type distribution board includes a control unit that controls the switching operation of the switching switch,
The said control part performs the control which makes the said switching switch a closed state, when it is judged that the self-supporting output voltage exceeded the said threshold voltage value, All of Claim 2 or Claim 4 characterized by the above-mentioned. Power storage system compatible with load-compatible distribution boards. A switching switch that automatically switches the power supplied to the general distribution board to a self-sustained output or a system output based on conditions, and a control unit that controls the switching operation of the switching switch,
The control unit controls the switching switch using a change in the storage voltage output from the storage unit as a trigger when the commercial power changes from a normal state to a power failure state, and supplies the general distribution board with power A full-load distribution board characterized by switching from a grid output to a stand-alone output.   The full load type distribution board according to claim 6, further comprising a main breaker provided between the switching switch and a commercial power system.