JP2021129331A - Power supply control device and power supply control method - Google Patents

Abstract

To provide a power supply control device and the like that can control the supply of power source electric power to a preset load while preventing effectively a short circuit between a plurality of power source electric powers.SOLUTION: A power supply system which supplies either of three or more power source electric powers having different priority of power source electric power to a prescribed load comprises: input terminals IN1 to IN3 to which each power source electric power is input respectively; a detector 1, a detector 11 and a detector 21 which correspond to each power source electric power and respectively detect whether each power source electric power is input or not; and a control relay 2, a control relay 12 and a control relay 22 which correspond to each power source electric power and prohibit each power source electric power from being supplied to the load after the latest low-order in the above priority when detecting input of the corresponding power source electric power.SELECTED DRAWING: Figure 2

Description

The present invention belongs to the technical field of the power supply control device and the power supply control method. More specifically, it belongs to the technical field of a power supply control device and a power supply control method for controlling the supply of a plurality of power supply power loads.

In view of the frequent occurrence of natural disasters in recent years, it is required to secure a power source in the event of a natural disaster in ordinary households as one of the countermeasures. Examples of the prior art document showing the prior art in view of this request include the following Patent Document 1.

The prior art described in Patent Document 1 is "a fixed storage battery and a fixed-side power generation device" for the purpose of "providing a power supply system that can use power supply power in various modes even in the event of a power failure". The connection between the mobile storage battery, the mobile power generator, the self-sustaining distribution board to which the minimum required selection load is connected in the event of a power failure, and the general load other than the selection load is connected to the self-sustaining distribution board. It is a technology related to "a power supply system equipped with a general distribution board". "In the event of a power failure, (i) when the general distribution board and the self-sustaining distribution board are connected, the mobile power generation device generates power. Electric power is supplied to the general load via the general distribution board and to the selected load via the self-supporting distribution board. (Ii) Fixed when the general distribution board and the self-supporting distribution board are not connected. The power generated by the side power generator is supplied to the selected load via the self-supporting distribution board. "

JP-A-2019-47575

However, when a plurality of power sources are switched and supplied to a preset load, it is essential to prevent a short circuit between the plurality of power sources. Not found in Document 1. Therefore, the conventional technique disclosed in Patent Document 1 has a problem that the short circuit cannot be prevented.

Therefore, the present invention has been made in view of the above requirements and problems, and one example of the problem is the power supply power to a preset load while effectively preventing a short circuit between a plurality of power supply power sources. It is an object of the present invention to provide a power supply control device and a power supply control method capable of controlling the supply of the power supply.

In order to solve the above problems, the invention according to claim 1 is a power supply control device for supplying any one of three or more power sources having different priorities as power sources to a preset load. A plurality of input means such as an input terminal into which the power supply power is input, and a plurality of detection means associated with each power supply power, and the power supply power is input to each of the input means. When a detection means such as a detection unit that detects whether or not the power supply is used, and a plurality of prohibition means associated with each power supply power, and the corresponding input of the power supply power is detected, the priority is given. It is provided with a prohibiting means such as a control relay that prohibits the supply of the power source power to the load after the nearest lower level.

In order to solve the above problems, the invention according to claim 12 is a power supply control device that supplies any one of three or more power sources having different priorities as power sources to a preset load. A plurality of input means such as an input terminal into which each said power source power is input, a plurality of detection means such as a detection unit associated with each said power source power, and a control associated with each said power source power. It is a power supply control method executed in a power supply control device including a plurality of prohibition means such as a relay, and each said detection of whether or not each power source power is input to each said input means. A detection step of detecting each by means, and a prohibition step of prohibiting the supply of each of the power sources of the power source power from the nearest lower priority to the load when the input of the corresponding power source power is detected by the prohibition means. ,including.

According to the invention according to claim 1 or 12, when the input of the power supply power to each of the input means associated with each power supply power is detected, each power supply of the nearest lower rank or higher in the priority as the power supply is detected. Since the supply of power to the load is prohibited, it is possible to control the supply of power to the predetermined load while effectively preventing a short circuit between the input power sources.

In order to solve the above problems, the invention according to claim 2 is the power supply control device according to claim 1, wherein the priority for each power supply power is stability or reliability as the power supply power. Each is preset based on at least one of the degrees.

According to the invention of claim 2, in addition to the action of the invention of claim 1, the priority of each power source is determined based on at least one of its stability and reliability. Therefore, even if a plurality of power sources having different stability or reliability are used, it is possible to control the supply to the load of each power source while effectively preventing a short circuit between the power sources.

In order to solve the above problems, the invention according to claim 3 is the power supply control device according to claim 1 or 2, to which the prohibited means are associated with each of the prohibited means. Input of the power supply power to which the prohibition means is associated when the supply to the load is not prohibited by the prohibition means corresponding to the power supply power immediately higher in the priority with respect to the power supply power. When is detected, the supply of the power source power immediately lower in the priority to the load is prohibited.

According to the invention of claim 3, in addition to the action of the invention of claim 1 or 2, it is prohibited to correspond to the power supply power most recently in priority with respect to the power supply power associated with the power supply. When the supply to the load is not prohibited by the means, the supply of the power supply power of the nearest lower priority to the load is prohibited, so that the power supply can be switched between multiple power sources while surely preventing short circuits between the two. It can supply the default load.

In order to solve the above problems, the invention according to claim 4 corresponds to each of the detection means in the power supply control device according to any one of claims 1 to 3. Each AC / DC converter having a different input voltage range corresponding to the priority as the attached power supply power is provided, and the priority as the corresponding power supply power is high for each input voltage range. The input voltage range is configured to be wider.

According to the invention of claim 4, in addition to the action of the invention of any one of claims 1 to 3, each detection means has priority as the power source to which it is associated. Since each AC / DC converter has a wider input voltage range as the degree increases, it is possible to reliably detect the presence or absence of an input for each power source having a different priority.

In order to solve the above problems, in the invention according to claim 5, in the power supply control device according to claim 4, the AC / DC converter is configured by a logic circuit.

According to the invention of claim 5, in addition to the operation of the invention of claim 4, since the AC / DC converter is composed of a logic circuit, the influence of noise on the detection of the presence or absence of input of power supply power Can be reduced to accurately detect the presence or absence of the above.

In order to solve the above problems, the invention according to claim 6 is a plurality of power supply control devices according to any one of claims 1 to 5, which are associated with each power source. A switching means such as a switching relay that switches any of the power sources and connects to the load, and a plurality of delay control means associated with the power sources. A delay control means such as a debounce processing unit that controls the switching means corresponding to the power supply power is further provided so as to delay the connection of the power supply power to the load.

According to the invention of claim 6, in addition to the action of the invention of any one of claims 1 to 5, the switching connection for any load of each power source is controlled to be delayed. Therefore, even a plurality of power sources having different priorities can be connected to the load after stabilization.

In order to solve the above problems, the invention according to claim 7 corresponds to the delay time of the connection by the delay control means corresponding to each power supply in the power supply control device according to claim 6. It is configured to have a delay time corresponding to the priority of the power source power.

According to the invention of claim 7, in addition to the operation of the invention of claim 6, the delay time of connection to the load corresponding to each power supply power is the delay time corresponding to the priority of the power supply power. Therefore, it can be connected to the load after being more stabilized according to the priority.

In order to solve the above problems, the invention according to claim 8 is the power supply control device according to claim 7, wherein the delay time corresponding to each power supply power is the power supply power corresponding to the power supply. The lower the priority, the longer it is configured.

According to the invention of claim 8, in addition to the action of the invention of claim 7, the lower the priority as the corresponding power source power, the longer the delay time in connecting to the load, so that it is more stable. The power source can be connected to the load.

In order to solve the above problems, the invention according to claim 9 comprises the power supply control device according to any one of claims 1 to 8, wherein the entire power supply control device is composed of a logic circuit. Has been done.

According to the invention of claim 9, in addition to the operation of the invention of any one of claims 1 to 8, since the entire power supply control device is composed of a logic circuit, external noise It is possible to connect to the load by accurately switching the power supply.

In order to solve the above problems, the invention according to claim 10 is the power supply control device according to any one of claims 1 to 9, wherein the power source power is a commercial power source or an electric vehicle. It is either the stored power in the above, the power generated by an external generator, or the solar power generated by using sunlight.
The priority of the commercial power> the priority of the stored power or the priority of the generated power> the priority of the solar power.

According to the invention of claim 10, in addition to the action of the invention of any one of claims 1 to 9, a plurality of power sources include commercial power, stored power, generated power, or solar power. It is one of the electric power, and each priority is
Since the priority of commercial power> the priority of stored power or the priority of generated power> the priority of solar power, it effectively prevents short-circuiting between power sources for four types of power sources with different priorities. At the same time, it is possible to stably control the supply of power to the default load.

In order to solve the above problems, the invention according to claim 11 is the power supply control device according to any one of claims 1 to 10, wherein the load is a commercial electric power in a general household. It is configured to be a load that requires power supply even during a power outage.

According to the invention of claim 11, in addition to the action of the invention of any one of claims 1 to 10, a load to which any of the power sources is supplied is commercially available in a general household. Since the load is required to be supplied even during a power failure, any one of a plurality of power sources can be reliably supplied to the load during the power failure.

According to the present invention, when the input of the power supply power to each of the input means associated with each power supply power is detected, the supply of the power supply power to the load of each power supply power from the nearest lower rank in the priority as the power supply is prohibited. ..

Therefore, it is possible to control the supply of power to a predetermined load while effectively preventing a short circuit between the input powers.

It is a block diagram which shows the outline structure of the power supply system of an embodiment, (a) is a block diagram which shows the outline structure of the power supply system at a normal time, (b) is the power supply at the time of a power failure of commercial power. It is a block diagram which shows the outline structure of a system. It is a block diagram which shows the outline structure of the important load distribution board of an embodiment. It is a circuit diagram which shows the detailed structure of the important load distribution board of an embodiment, (a) is a circuit diagram which shows the structure of the detection part of an embodiment, and (b) shows the structure of the debounce control part of an embodiment. It is a circuit diagram. It is a flowchart which shows the power supply control processing of embodiment.

Next, a mode for carrying out the present application will be described with reference to FIGS. 1 to 4. The embodiment described below is an embodiment when the present invention is applied to a power supply system including a distribution board for a general house. Further, FIG. 1 is a block diagram showing an outline configuration of the power supply system of the embodiment, FIG. 2 is a block diagram showing an outline configuration of the important load distribution board of the embodiment, and FIG. 3 is a block diagram showing an outline configuration of the important load distribution board of the embodiment. FIG. 4 is a circuit diagram showing a detailed configuration of a distribution board, and FIG. 4 is a flowchart showing a power supply control process of the embodiment.

As shown in FIG. 1, the power supply system S of the embodiment is a power supply system that supplies power to the general load LD2 and the critical load LD1 used in the house H, respectively. At this time, the general load LD2 includes electric appliances and the like used to lead a comfortable life in the house H, and specifically, for example, a vacuum cleaner, an IH (Induction Heating) heater, an electric water heater and the like. Includes air conditioner, etc. On the other hand, the critical load LD1 is an electric appliance that needs to be used even when the commercial power CM (usually the commercial power of AC 100 volt (frequency is 50 Hz or 60 Hz)) supplied to the house H is cut off. Etc., and specifically, lighting, television equipment, refrigerators, and the like are included.

The power supply system S of the embodiment has a residential distribution board SB2 that distributes a commercial power CM supplied via an external electric wire to the general load LD2 and the important load distribution board SB1, respectively, and the commercial power CM. It is provided with the above-mentioned important load distribution board SB1 that distributes power to the important load LD1. At this time, the commercial power CM distributed to the critical load LD1 by the critical load distribution board SB1 also includes the commercial power CM distributed via the residential distribution board SB2. On the other hand, the important load distribution board SB1 does not distribute power to the general load LD2. Further, in the power supply system S of the embodiment, the photovoltaic power generated by receiving the sunlight is transmitted to the residential distribution board SB2 and the important load distribution board SB1 via the power conditioner PC. A separately supplied solar panel SP is included. Then, the residential distribution board SB2 and the critical load distribution board SB1 distribute the power supply power supplied from the solar panel SP to the general load LD2 and the critical load LD1, respectively, in addition to the commercial power CM. At this time, the power supply power supplied from the solar panel SP is distributed to the critical load LD1 via the critical load distribution board SB1 even during a power failure of the commercial power CM described later, for example. In addition to these, the critical load distribution board SB1 is supplied with storage battery power, which is power from an in-vehicle storage battery provided in the electric vehicle EC illustrated in FIG. 1. The critical load distribution board SB1 is capable of distributing the storage battery power to the critical load LD1, for example, in the event of a power failure of the commercial power CM.

Then, in the normal time when the commercial power CM is supplied, the residential distribution board SB2 distributes the commercial power CM and the solar power to the general load LD2 as shown in FIG. 1 (a). .. Similarly, the important load distribution board SB1 distributes the commercial power CM and the above-mentioned solar power to the important load LD1 in the normal time.

On the other hand, when the commercial power CM loses power, as shown in FIG. 1 (b), the supply of the solar power and the storage battery power to the residential distribution board SB2 can be continued, but for the residential use. The distribution board SB2 stops functioning, and thus the distribution of power to the general load LD2 is also stopped. On the other hand, the power distribution to the important load LD1 is continued by using the solar power and the storage battery power. The supply of solar power in this case is based on the so-called self-sustaining operation of the power conditioner PC.

Next, the important load distribution board SB1 which is the core of the power supply system S of the embodiment will be described more specifically with reference to FIGS. 2 to 4.

As shown in FIG. 2, the critical load distribution board SB1 of the embodiment is supplied with the commercial power CM, the storage battery power ECP, and the solar power SPP, respectively. At this time, the storage battery power ECP is supplied when the electric vehicle EC is connected. Then, the power supply power output from the critical load distribution board SB1 is supplied to the critical load LD1 via the breaker BK. At this time, from the viewpoint of stability or reliability as power supply power, in general,
It can be said that the stability or reliability of the commercial power CM> the stability or reliability of the storage battery power ECP> the stability or reliability of the photovoltaic power SPP. In the following description, at least one of the above stability and reliability in each power source power is simply referred to as "stability and the like". Further, in the power supply system S of the embodiment, regarding the priority of distribution to the important load LD1 of the storage battery power ECP other than the commercial power CM and the solar power SPP, the priority of the storage battery power ECP according to the stability and the like of each. The degree is set to priority 1, and the priority of the solar power SPP is set to priority 2.

Then, the important load distribution board SB1 corresponds to the commercial power CM, and has an input terminal IN1 to which the commercial power CM is input, a detection unit 1, a control relay 2, a debounce control unit 3, and a switching relay 4. And have. Further, the important load distribution board SB1 has an input terminal IN2 to which the storage battery power ECP is input, a detection unit 11, a control relay 12, a debounce control unit 13, and a switching relay 14 corresponding to the storage battery power ECP. , Is equipped. Further, the important load distribution board SB1 corresponds to the photovoltaic power supply SPP, and has an input terminal IN3 to which the photovoltaic power SPP is input, a detection unit 21, a control relay 22, a debounce control unit 23, and a switching relay. 24 and. Then, the output of the power supply power from the critical load distribution board SB1 is supplied to the breaker BK and the critical load LD1 via the output terminal OUT.

At this time, the input terminal IN1 to the input terminal IN3 correspond to an example of the "input means" of the present invention, and the detection unit 1, the detection unit 11 and the detection unit 21 correspond to an example of the "detection means" of the present invention, respectively. , The control relay 2, the control relay 12, and the control relay 22 correspond to an example of the "prohibition means" of the present invention, respectively. Further, the debounce control unit 3, the debounce control unit 13, and the debounce control unit 23 correspond to an example of the "delay control means" of the present invention, respectively, and the switching relay 4, the switching relay 14, and the switching relay 24 correspond to the "switching means" of the present invention. Corresponds to each example.

In the above configuration, the detection unit 1, the detection unit 11, and the detection unit 21 respectively set, for example, the voltages of the input commercial power CM, the capacitor power ECP (priority 1), and the solar power SPP (priority 2), respectively. I'm watching. Then, when it is detected that the voltage of the commercial power CM is higher than the preset commercial power threshold, the detection unit 1 generates a detection signal D1 indicating that the high voltage commercial power CM has been detected. Output to control relay 2. Further, when the detection unit 11 detects that the voltage of the storage battery power ECP is higher than the preset storage battery power threshold, the detection unit 11 generates a detection signal D2 indicating that the high voltage storage battery power ECP has been detected. Output to the control relay 12. Further, when the detection unit 21 detects that the voltage of the solar power SPP is higher than the preset solar power threshold, the detection unit 21 generates a detection signal D3 indicating that the high voltage solar power SPP has been detected. Then, it is output to the control relay 22.

Here, assuming that the rating of the power supply power supplied to the important load LD1 is 100 volts, the relationship between the commercial power threshold, the storage battery power threshold, and the solar power threshold will be described. That is, as described above, the relationship between the stability of the commercial power CM, the storage battery power ECP, and the solar power SPP is as described above.
Stability of commercial power CM, etc.> Stability of storage battery power ECP, etc.> Stability of solar power SPP, etc. Therefore, in response to this, the commercial power threshold value is set to a low threshold value of, for example, about 30 volts in order to detect the commercial power CM having high stability and the like at an early stage. On the other hand, the solar power threshold is set to a high threshold of, for example, about 90 volts in order to accurately detect that the solar power SPP having low stability or the like is close to the rating. The storage battery power threshold value for detecting the storage battery power ECP having moderate stability or the like is set as a value between the commercial power threshold value and the solar power threshold value, for example, about 50 volts. Specific values of each of these threshold values may be predetermined, for example, empirically or experimentally, depending on the stability of each electric power, the price or size of usable parts, and the like.

Next, when the detection signal D1 is output from the detection unit 1, the control relay 2 prohibits the supply to the critical load LD1 via the output terminals OUT and the breaker BK of the storage battery power ECP and the solar power SPP, respectively. The prohibition signal IB1 is generated and output to the control relay 12 and the control relay 22. In addition to this, when the detection signal D1 is output, the control relay 2 is a switching relay 4 that controls on / off of supply to the critical load LD1 via the output terminal OUT of the commercial power CM and the breaker BK. In order to control the operation of the switching delay, a control signal C1 instructing the delay operation is generated and output to the debounce control unit 3. As a result, the debounce control unit 3 delays the commercial power CM from the timing when the detection signal D1 is output from the detection unit 1 by a preset commercial power delay time, and then places an important load on the commercial power CM via the output terminal OUT and the breaker BK. A control signal DB1 for controlling the switching relay 4 so as to be supplied to the LD1 is generated and output to the switching relay 4. Then, the switching relay 4 supplies the commercial power CM to the breaker BK and the critical load LD1 by short-circuiting the switching relay 4 by delaying the commercial power delay time based on the control signal DB1. As a result, only the commercial power CM is supplied to the critical load LD1 during a normal time other than a power failure.

On the other hand, the control relay 12 corresponding to the storage battery power ECP determines whether or not the prohibition signal IB1 is output from the control relay 2 when the detection signal D2 is output from the detection unit 11, and the prohibition signal IB1 is output. If not, a prohibition signal IB2 indicating that the supply to the critical load LD1 via the output terminal OUT of the solar power SPP and the breaker BK is prohibited is generated and output to the control relay 22. In addition to this, when the detection signal D2 is output and the prohibition signal IB1 is not output, the control relay 12 supplies the critical load LD1 via the output terminal OUT of the storage battery power ECP and the breaker BK. In order to control the switching delay operation in the switching relay 14 that controls on / off, a control signal C2 instructing the delay operation is generated and output to the debounce control unit 13. As a result, the debounce control unit 13 delays the storage battery power delay time set in advance from the timing at which the detection signal D2 is output from the detection unit 11, and then loads the storage battery power ECP via the output terminal OUT and the breaker BK. A control signal DB2 for controlling the switching relay 14 so as to be supplied to the LD1 is generated and output to the switching relay 14. Then, the switching relay 14 supplies the storage battery power ECP to the breaker BK and the critical load LD1 by delaying the storage battery power delay time by the storage battery power delay time and short-circuiting the switching relay 14 based on the control signal DB2. As a result, when the storage battery power ECP is supplied even during a power failure of the commercial power CM, only the storage battery power ECP is supplied to the critical load LD1.

Further, the control relay 22 corresponding to the solar power SPP determines whether or not the prohibition signal IB1 is output from the control relay 2 and the prohibition signal IB2 from the control relay 12 when the detection signal D3 is output from the detection unit 21. Whether or not there is an output is determined, and when both the prohibition signal IB1 and the prohibition signal IB2 are not output, the supply to the critical load LD1 via the output terminal OUT of the solar power SPP and the breaker BK is turned on / off. In order to control the delay operation in the switching relay 24 that controls the above, a control signal C3 instructing the delay operation is generated and output to the debounce control unit 23. As a result, the debounce control unit 23 delays the solar power SPP from the timing at which the detection signal D3 is output from the detection unit 21 by a preset solar power delay time, and then transmits the solar power SPP via the output terminal OUT and the breaker BK. A control signal DB3 for controlling the switching relay 24 so as to be supplied to the critical load LD1 is generated and output to the switching relay 24. Then, the switching relay 24 supplies the solar power SPP to the breaker BK and the critical load LD1 by delaying the switching relay 24 by the solar power delay time based on the control signal DB3 and short-circuiting the switching relay 24. As a result, when the commercial power CM is out of power and the storage battery power ECP is not supplied, only the solar power SPP is supplied to the critical load LD1.

Here, the relationship between the commercial power delay time, the storage battery power delay time, and the solar power delay time will be described. That is, the commercial power delay time, the storage battery power delay time, and the solar power delay time correspond to the stability of each of the commercial power CM, the storage battery power ECP, and the solar power SPP. The higher the power supply power, the shorter the time required for stabilization (that is, the time until it is possible to switch to the power supply power and supply it to the critical load LD1).
The commercial power delay time <the storage battery power delay time <the solar power delay time. More specifically, for example, the commercial power delay time is preferably about 0.5 seconds, the solar power delay time is preferably about 5 seconds, and the storage battery power delay time is the above. The interval between the commercial power delay time and the solar power delay time is set to about 2 to 3 seconds. Similar to the above threshold values, the specific values of each of these delay times may be determined in advance, for example, empirically or experimentally, depending on the stability of each electric power and the price or size of usable parts. good.

The critical load distribution board SB1 of the embodiment having the configuration and operation as described above includes, as a whole, members or functions realized by software by reading and executing a preset program by a microcomputer. It is composed only of so-called hardware logic circuits.

More specifically, for example, the detection unit 1, the detection unit 11, and the detection unit 21 are composed of electronic components similar to each other, and the AC / DC converter 50, the capacitor 51, and the capacitor 52 are shown in FIG. It is configured to be connected as illustrated in a). Then, in response to each of the above-mentioned threshold values (in other words, the stability of the corresponding power supply power, etc.),
The input voltage range of the AC / DC converter 50 that constitutes the detection unit 1> the input voltage range of the AC / DC converter 50 that constitutes the detection unit 11> the input voltage range of the AC / DC converter 50 that constitutes the detection unit 21. There is. At this time, regarding the input voltage range of the AC / DC converter 50 constituting the detection unit 21, if the rating of the power supply power supplied to the critical load LD1 is 100 volts, the input voltage range is also around 100 volts. It is preferable that the setting is as follows.

Further, for example, the debounce control unit 3, the debounce control unit 13, and the debounce control unit 23 are composed of electronic components similar to each other, and are a delay control circuit 60, a resistor 61 to a resistor 66, a resistor 68, and a capacitor 67. In addition, the active element 69 is connected and configured as illustrated in FIG. 3 (b). The commercial power delay time in the debounce control unit 3, the storage battery power delay time in the debounce control unit 13, and the solar power delay time in the debounce control unit 23 are the resistances of the resistors 62 to 65, respectively. By changing the values individually or in combination, they are preset for each of the debounce control unit 3, the debounce control unit 13, and the debounce control unit 23.

Next, the power supply control process of the embodiment executed by the important load distribution board SB1 of the embodiment having the above-described configuration will be specifically described with reference to FIG. 4 in chronological order. The power supply control process of the embodiment shown in FIG. 4 has been continuously executed since the important load distribution board SB1 was installed in the house H.

That is, as shown on the left side of FIG. 4, in the normal time when there is no power failure of the commercial power CM, the voltage of the commercial power CM supplied via the input terminal IN1 is constantly monitored by the detection unit 1. (Step S1. Step S1: NO.). Then, when the commercial power CM having a voltage exceeding the commercial power threshold value is detected (step S1: YES), the control relay 2 receives the prohibition signal based on the detection signal D1 (see FIG. 2) as the detection result. The IB1 is generated and output to the control relay 12 and the control relay 22, and the control signal C1 is generated and output to the debounce control unit 3 (step S2).

After that, the debounce control unit 3 delays the commercial power CM by the commercial power delay time from the timing when the detection signal D1 is output from the detection unit 1 based on the control signal C1 and then supplies the commercial power CM to the critical load LD1. The control signal DB1 for controlling the switching relay 4 is generated and output to the switching relay 4 (step S3). As a result, the switching relay 4 short-circuits the switching relay 4 by delaying the commercial power delay time based on the control signal DB1 (step S4), and supplies the commercial power CM to the critical load LD1 (step S5). After that, the process returns to the monitoring of step S1 and the monitoring of step S1 or the process of step S5 described above is repeatedly executed. As a result, only the commercial power CM is supplied to the critical load LD1 during a normal time other than a power failure. If a power failure occurs in the commercial power CM while the monitoring of step S1 or the process of step S5 described above is repeated (step S1: NO), the monitoring of step S1 is repeated until the power failure is restored. Therefore, the control relay 2 does not generate and output the prohibition signal IB1 (step S2), and the subsequent processing of step S3 or step S5 is not performed.

On the other hand, as shown in FIG. 4, even in a normal time when there is no power failure for the commercial power CM, if the storage battery power ECP (priority 1) is supplied via the input terminal IN2, the voltage is detected by the detection unit. It is constantly monitored by step 11 (step S10; step S10: NO). Then, when the storage battery power ECP having a voltage exceeding the storage battery power threshold value is detected (step S10: YES), the control relay 12 then determines whether or not the prohibition signal IB1 is output from the control relay 2 (step S10: YES). Step S11). In the determination of step S11, when the prohibition signal IB1 is output (step S11: YES), the control relay 12 does not execute steps S12 to S15, which will be described later, and determines the output of the prohibition signal IB1. Repeat at preset time intervals.

On the other hand, when the prohibition signal IB1 is not output in the determination in step S11 (step S11: NO), the control relay 12 is based on the detection signal D2 (see FIG. 2) as the detection result in the monitoring in step S10. , The prohibition signal IB2 is generated and output to the control relay 22, and the control signal C2 is generated and output to the debounce control unit 13 (step S13). After that, the debounce control unit 13 switches to supply the storage battery power ECP to the critical load LD1 after delaying the storage battery power ECP by the storage battery delay time from the timing when the detection signal D2 is output from the detection unit 11 based on the control signal C2. The control signal DB2 for controlling the relay 14 is generated and output to the switching relay 14 (step S13). As a result, the switching relay 14 short-circuits the switching relay 14 by delaying the storage battery delay time based on the control signal DB2 (step S14), and supplies the storage battery power ECP to the critical load LD1 (step S15). At this time, if the prohibition signal IB1 is not output in the determination in step S11, it means that the supply of the commercial power CM to the important load LD1 is stopped. Therefore, the importance of the capacitor power ECP by the processing in step S15. The supply to the load LD1 and the supply to the critical load LD1 of the commercial power CM do not overlap. After that, returning to the monitoring in step S10, the monitoring in step S10 or the process in step S15 described above is repeatedly executed. As a result, in the event of a power failure of the commercial power CM, only the storage battery power ECP is supplied to the critical load LD1. If the supply of the capacitor power ECP from the electric vehicle EC is stopped while the monitoring of step S10 and the process of step S15 are repeated (step S10: NO), the storage battery power ECP is supplied again. Since the monitoring of step S10 is repeated until the start, the generation and output of the prohibition signal IB2 by the control relay 12 (step S12), and the subsequent processing of step S13 to processing of step S15 are not performed.

On the other hand, as shown on the right side of FIG. 4, even in the normal state where there is no power failure for the commercial power CM and when the storage battery power ECP is supplied from the electric vehicle EC, the solar power SPP is supplied via the input terminal IN3. When there is a supply of (priority 2), the voltage is constantly monitored by the detection unit 21 (step S20; step S20: NO). Then, when the solar power SPP having a voltage exceeding the solar power threshold value is detected (step S20: YES), then the control relay 22 outputs either the prohibition signal IB1 or the prohibition signal IB2. It is determined whether or not (step S21). In the determination of step S21, when either the prohibition signal IB1 or the prohibition signal IB2 is output (step S21: YES), the control relay 22 does not execute steps S22 to S25 described later, and the prohibition is prohibited. The determination of the output of the signal IB1 or the prohibition signal IB2 is repeated at preset time intervals.

On the other hand, when neither the prohibition signal IB1 nor the prohibition signal IB2 is output in the determination in step S21 (step S21: NO), the control relay 22 determines the detection signal D3 (FIG. 2), the control signal C3 is generated and output to the debounce control unit 23 (step S21). After that, the debounce control unit 23 delays the detection signal D3 from the timing when the detection signal D3 is output from the detection unit 21 by the above-mentioned solar delay time based on the control signal C3, and then supplies the solar power SPP to the important load LD1. The control signal DB3 for controlling the switching relay 24 is generated and output to the switching relay 24 (step S22). As a result, the switching relay 24 delays the switching relay 24 by the solar delay time based on the control signal DB3 to short-circuit the switching relay 24 (step S23), and supplies the solar power SPP to the critical load LD1 (step S24). .. At this time, if neither the prohibition signal IB1 nor the prohibition signal IB2 is output in the determination in step S21, it means that the supply of the commercial power CM and the storage battery power ECP to the important load LD1 is stopped. The supply of the photovoltaic power SPP to the critical load LD1 and the supply of the commercial power CM and the storage battery power ECP to the critical load LD1 by the process of step S24 do not overlap. After that, returning to the monitoring of step S20, the monitoring of step S20 or the process of step S24 described above is repeatedly executed. As a result, when a power failure occurs in the commercial power CM and the supply of the storage battery power ECP is also stopped, only the photovoltaic power SPP is supplied to the critical load LD1.

As described above, according to the operation of the power supply system S of the embodiment including the important load distribution board SB1, the power supply power for each of the detection units 1 and the like associated with each power supply power of the commercial power CM and the like. When the input of is detected, the commercial power CM is given the highest priority, and the supply of each power supply power from the nearest lower level to the important load LD1 is prohibited in terms of stability as a power supply, so a short circuit between the input power supply powers is prohibited. It is possible to control the supply of power supply power to the default critical load LD1 while effectively preventing the above.

In addition, since the priority of each power source is set based on its stability and the like, short circuits between the power sources can be effectively prevented even if there are a plurality of power sources having different stability or reliability. At the same time, it is possible to control the supply of each power source power to the important load LD1.

Further, when the supply to the critical load LD1 is not prohibited by the power supply of the nearest upper power source in terms of stability or the like with respect to the associated power source power, the power supply of the power source of the nearest lower rank in terms of stability or the like is sent to the important load LD1. (See FIGS. 2 and 3), it is possible to switch a plurality of power sources and supply the power to the predetermined critical load LD1 while surely preventing short circuits between the two.

Furthermore, since the detection unit 1, the detection unit 11, and the detection unit 21 each include an AC / DC converter 50 having a wider input voltage range as the stability as the power source power associated with the detection unit 1 is higher, the detection unit 1 is stable. It is possible to reliably detect the presence or absence of input for each power source with different degrees. At this time, since the AC / DC converter 50 is composed of a logic circuit, it is possible to reduce the influence of noise on the detection of the presence / absence of the input of the power supply power and accurately detect the presence / absence.

Further, since the debounce control unit 3, the debounce control unit 13, and the debounce control unit 23 control so as to delay the switching connection of each power source power to any of the important loads LD1 (see FIGS. 2 and 3), the stability is stable. Even if a plurality of power sources have different power sources, they can be connected to the critical load LD1 after stabilization.

Further, the delay time of connection to the critical load LD1 by the debounce control unit 3, the debounce control unit 13, and the debounce control unit 23 (the commercial power delay time, etc.) is a delay time corresponding to the stability of the power supply power and the like. Therefore, it can be connected to the critical load LD1 after being more stabilized according to the stability and the like.

Furthermore, the lower the stability as the corresponding power supply power, the longer the delay time in connecting to the important load LD1, so that the power supply power can be connected to the important load LD1 more stably.

Further, since the entire critical load distribution board SB1 is composed of a logic circuit, it is possible to suppress external noise and accurately switch the power supply to connect to the critical load LD1.

Further, the plurality of power sources are any of commercial power CM, storage battery power ECP, and solar power SPP, and the priority based on the stability of each is set.
Since the priority of commercial power CM> the priority of storage battery power ECP> the priority of solar power SPP, it is possible to effectively prevent short circuits between power sources for three types of power sources with different priorities. It is possible to stably control the supply of power supply power to the default critical load LD1.

Furthermore, since the critical load LD1 to which any of the power sources is supplied is the critical load LD1 that is required to supply power even during a power failure of the commercial power CM in the general house H, a plurality of important loads LD1 are required at the time of the power failure. Any of the power sources can be reliably supplied to the critical load LD1.

In the above-described embodiment, the case where the power supply power supplied to the power supply system S is three types of commercial power CM, storage battery power ECP, and solar power SPP has been described, but as other power source power sources. For example, a generator provided in the house H, a storage battery for storing the electric power generated by the generator, a household fuel cell, a household gas power generation device, a biomass power generation device, and the like can be considered. Then, when these are used as the power supply power, the power supply power supplied to the critical load LD1 may be switched based on the stability of the power supply power supplied from them, as in the power supply system S of the embodiment. .. In this case, the lower the priority (stability, etc.) of the power supply, the more the prohibition signal corresponding to the other power supply higher in the priority (stability, etc.) is not output. It is preferable that the power source power having a low priority (stability, etc.) is supplied to the critical load LD1. Regarding the priority of the power supply power other than the commercial power CM including the storage battery power ECP and the solar power SPP, the power supply is performed in addition to the case of the embodiment (case of storage battery power ECP> solar power SPP). It is preferable that the system S is flexibly changed according to the location of the house H in which the system S is used, its environment, and the like.

Further, in the above-described embodiment, the case where the important load LD1 and the general load LD2 each use the AC power supply power has been described, but in addition to this, the case where the device using the DC power supply power is a load is described. It is also possible to apply the invention. In this case, the power source power output from the breaker BK may be converted into direct current for use.

Further, in the above-described embodiment, the case where the power supply power supplied to the important load distribution board SB1 and the residential distribution board SB2 is alternating current has been described, but in addition to this, when the power supply power is direct current. It is also possible to apply the present invention. In this case, for example, the direct current may be converted into alternating current before being input to the important load distribution board SB1 or at the time of output from the important load distribution board SB1.

As described above, the present invention can be used in the field of a power supply system, and particularly when applied to the field of a power supply system for a general house H, a particularly remarkable effect can be obtained.

1, 11, 21 Detection unit 2, 12, 22 Control relay 3, 13, 23 Debounce control unit 4, 14, 24 Switching relay 50 AC / DC converter 51, 52, 67 Capacitor 60 Delay control circuit 61, 62, 63, 64, 65, 66, 68 Resistance 69 Active element S Power supply system LD1 Important load LD2 General load CM Commercial power SB1 Important load distribution board SB2 Residential distribution board PC power conditioner SP Solar panel EC Electric vehicle ECP Storage battery power SPP Solar power BK breaker IN1, IN2, IN3 Input terminal OUT Output terminal D1, D2, D3 Detection signal IB1, IB2 Prohibition signal C1, C2, C3, DB1, DB2, DB3 Control signal

Claims (12)

In a power supply control device that supplies any of three or more power sources with different priorities as power sources to a preset load.
A plurality of input means into which each of the power sources is input, and
A plurality of detecting means associated with each of the power sources, and a detecting means for detecting whether or not each of the power sources is input to each of the input means.
It is a plurality of prohibition means associated with each of the power sources, and when the input of the corresponding power source is detected, the supply of the power sources of the power sources from the nearest lower priority to the load is supplied. Prohibition measures and prohibition measures
A power supply control device comprising. In the power supply control device according to claim 1,
A power supply control device, wherein the priority for each power source is set in advance based on at least one of stability and reliability as the power source. In the power supply control device according to claim 1 or 2.
When each of the prohibiting means is not prohibited from supplying to the load by the prohibiting means corresponding to the power supply power that is most recently higher in the priority with respect to the power supply power to which the prohibiting means is associated. In the power supply control device, when the input of the power supply power to which the prohibition means is associated is detected, the supply of the power supply power immediately lower in the priority to the load is prohibited. .. In the power supply control device according to any one of claims 1 to 3.
Each of the detection means includes an AC / DC converter having a different input voltage range corresponding to the priority as the power source power to which the detection means is associated.
A power supply control device, characterized in that, for each of the input voltage ranges, the higher the priority as the corresponding power source power, the wider the input voltage range. In the power supply control device according to claim 4,
A power supply control device characterized in that the AC / DC converter is composed of a logic circuit. In the power supply control device according to any one of claims 1 to 5.
A plurality of switching means associated with each of the power sources, and a switching means for switching any of the power sources and connecting to the load.
A plurality of delay control means associated with each power source, and delay control means for controlling the switching means corresponding to the power source so as to delay the connection of the corresponding power source to the load. When,
A power supply control device characterized by further comprising. In the power supply control device according to claim 6,
A power supply control device, wherein the delay time of the connection by the delay control means corresponding to each power supply power is a delay time corresponding to the priority of the corresponding power supply power. In the power supply control device according to claim 7.
A power supply control device, characterized in that the delay time corresponding to each power source power is longer as the priority as the corresponding power source power is lower. In the power supply control device according to any one of claims 1 to 8.
A power supply control device characterized in that the entire power supply control device is composed of a logic circuit. In the power supply control device according to any one of claims 1 to 9.
Each of the power sources is either commercial power, stored power in an electric vehicle, power generated by an external generator, or solar power generated using sunlight.
Regarding the priority, the power supply control device is characterized in that the priority of the commercial power> the priority of the stored power or the priority of the generated power> the priority of the solar power. The power supply control device according to any one of claims 1 to 10.
The load is a power supply control device characterized in that the load is a load that is required to be supplied with electric power even in the event of a power failure of commercial electric power in a general household. It is a power supply control device that supplies any of three or more power sources having different priorities as power sources to a preset load, and is a plurality of input means into which each of the power sources is input, and each of the power sources. A power supply control method executed in a power supply control device including a plurality of detection means associated with electric power and a plurality of prohibition means associated with each power source power.
A detection step of detecting whether or not each power source is input to each of the input means by each of the detection means.
When the input of the corresponding power source power is detected, the prohibition step of prohibiting the supply of the power source power from the nearest lower level to the load by the prohibition means and the prohibition step.
A power supply control method comprising.

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