JP2013183605A - System for avoiding overlapping of inrush current - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid overlapping of inrush current by simultaneous power-supply for a plurality of outlets with simple configuration without depending on a server.SOLUTION: The system includes a plurality of outlets 21 to 23 having: switches 31 to 33 that are closed by power-supply based on a power-on instruction; and sensors 41 to 43 that detect convergence of the inrush current generated by closing of the switches 31 to 33, and avoids overlapping of the inrush current by simultaneous power-supply for the plurality of outlets 21 to 23. And the system provides an IC chip 51: including power-supply information A by the power-supply based on the power-on instruction for any one of the plurality of outlets 21 to 23 and inrush current convergence information B from the outlets 21 to 23 subjected to the power-supply; exchanging the information A, B between the plurality of outlets 21 to 23; and, thereby, selectively closing the switches 31 to 33 of remaining outlets 21 to 23 after elapse of a random standby time.

Description

  The present invention relates to an inrush current overlap avoidance system for avoiding an overlap of inrush currents generated by simultaneous power-on to a plurality of electric devices installed in, for example, a general household or an office building.

  For example, some electric devices installed in ordinary homes and office buildings temporarily generate a large current exceeding the rated current of the electric device, that is, a so-called inrush current, immediately after the power is turned on. When a plurality of such electric devices are turned on simultaneously, the inrush currents generated in the respective electric devices are overlapped, resulting in a very large current.

  When an extremely large current is generated due to such an inrush current overlap, the circuit breaker breaker connected to the plurality of electric devices described above operates, thereby causing circuit interruption, destabilization of the power supply voltage, and other related factors. Negative effects on electrical equipment occur. In particular, when operating a distributed power source such as a solar cell alone, the power source capacity of the distributed power source is limited, so a voltage drop due to an inrush current occurs and other electrical equipment connected to the distributed power source, etc. There is concern that it will adversely affect

  As a means for solving this problem, it is conceivable to provide a power supply capacity and a circuit capable of withstanding an extremely large current generated by the inrush current overlap. However, in that case, it is necessary to review the entire power supply and wiring facility, which is not a preferable means. On the other hand, an inrush current overlap avoidance system has been proposed in which a plurality of inrush currents do not overlap and do not exceed a certain total current by sampling and storing the inrush current of each electrical device (for example, , See Patent Document 1).

  The inrush current overlap avoidance system disclosed in Patent Document 1 includes a cooperative power control device connected to each of a plurality of electrical devices, and a server that supervises the cooperative power control device. In addition to registering the current control availability and priority of the electrical device, the server obtains the inrush current pattern sampled by each cooperative power control device and converts it into power, and then newly connects the electrical device to the power source. In this case, the total of the current converted power and the registered total power consumption are compared, and based on the result, the power on / off instruction of the electric device is instructed to the cooperative power control apparatus newly connecting the electric device. Is output.

JP 2003-299264 A

  By the way, in the inrush current overlap avoidance system disclosed in Patent Document 1, when an inrush current is generated at the time of regular startup or in an already operating electric device, the total current is calculated from the period and peak value pattern of the inrush current of each electric device. In order to control the electric device current by predicting whether or not it exceeds the set value, the electric power of the electric device is controlled in a coordinated manner so that the total power consumption due to the inrush current of each electric device does not exceed the set value be able to. Moreover, even if all the electrical devices are started up simultaneously, the power of the electrical devices can be controlled in a coordinated manner so that the total power consumption due to the inrush current of each electrical device does not exceed the set value according to the order registered in the server. .

  However, since the inrush current overlap avoidance system disclosed in Patent Document 1 includes a server that controls a cooperative power control device connected to each of a plurality of electric devices, the equipment is large and the control is complicated, In the system construction, the cost increases. In addition, if the server goes down for any reason, it may become impossible to control the cooperative power control device connected to each of a plurality of electrical devices, and the entire system may become inoperable. It will cause a decline in sex.

  Therefore, the present invention has been proposed in view of the above-described problems, and the object of the present invention is to overlap inrush currents by simultaneously powering on a plurality of electric devices with a simple configuration without depending on a server. It is an object of the present invention to provide an inrush current overlap avoidance system that can avoid the above.

  As technical means for achieving the above-described object, the present invention provides a contact opening / closing means that is closed by power-on based on a turn-on command, and a current that detects convergence of an inrush current generated by closing the contact opening / closing means. A system that includes a plurality of electrical devices having detection means and that avoids overlapping of inrush currents due to simultaneous power-on to the plurality of electrical devices, and that is directed to any one of the plurality of electrical devices By sending and receiving the power-on information based on power-on and in-rush current convergence information from power-on electrical equipment between multiple electrical equipment, the remaining electrical equipment A communication control means for selectively closing the contact opening / closing means is provided. In addition, the electrical outlet in this invention can apply the electrical outlet arrange | positioned at the table tap.

  In the present invention, the communication control means includes power-on information based on power-on based on a power-on command for any one of the plurality of electric devices, and inrush current convergence information from the power-on electric device. Communicating between a plurality of electrical devices, that is, passing power-on information and inrush current convergence information between a plurality of electrical devices. Thereby, a system can be constructed with a simple configuration without depending on a conventional server.

  In the present invention, the communication control means selectively closes the contact opening / closing means of the remaining electrical equipment after the random standby time has elapsed. Thus, based on the exchange of power-on information and inrush current convergence information between a plurality of electrical devices, the timing of closing the contact opening / closing means of the remaining electrical devices is shifted by a random standby time. Current overlap can be suppressed.

  The communication control means in the present invention transmits power-on information by power-on based on a power-on command to any one of the plurality of electric devices to the remaining electric devices, and to any of the remaining electric devices The remaining electrical devices are deferred from power-on until at least a random waiting time elapses from the power-on command, and after the inrush current convergence information is received from the powered-on electrical devices, It is desirable to close the contact opening / closing means by turning on the power for the electrical equipment for which the input command has been issued. With such simple control, the timing for closing the contact opening / closing means of the remaining electrical devices based on the exchange of power-on information and inrush current convergence information between the plurality of electrical devices is set to a random standby time. Therefore, the inrush current can be avoided with a sufficiently high probability.

  The communication control means in the present invention starts the random standby time from the input command to any of the remaining electrical devices, or starts when the inrush current convergence information is received from the power-on electrical device. It is possible to set either. By setting a random standby time in this way, it is possible to avoid the inrush current overlap with a sufficiently high probability.

  According to the present invention, by passing power-on information and inrush current convergence information between a plurality of electrical devices, a system can be constructed with a simple configuration without depending on a server as in the prior art. In addition, based on the exchange of power-on information and inrush current convergence information between multiple electrical devices, the timing of closing the contact opening and closing means of the remaining electrical devices is shifted by a random standby time, so that the inrush current can be reduced. Overlap can be suppressed. By such simple means, it is possible to avoid inrush current overlap due to simultaneous power-on to a plurality of electrical devices, so circuit breakage due to breaker operation of the distribution board, destabilization of the power supply voltage and other accompanying It is possible to prevent adverse effects on electrical equipment and improve reliability.

In embodiment of this invention, it is a schematic block diagram which shows the table tap which has arrange | positioned several outlet socket. It is a schematic block diagram for demonstrating delivery of the information between several outlets. It is a flowchart which shows an example of delivery of the information between several outlets. It is a flowchart which shows the other example of delivery of the information between several outlets.

  An embodiment of the inrush current overlap avoidance system according to the present invention will be described in detail below. In the following embodiments, a case where the present invention is applied to a table tap provided with an outlet as an electric device will be exemplified. However, the present invention is not limited to a table tap provided with a plurality of outlets, and can be applied to other electric devices.

  As shown in FIG. 1, the inrush current overlap avoidance system of this embodiment avoids inrush current overlap due to simultaneous power-on to a plurality of outlets 21 to 23 arranged in the table tap 11. Each of the outlets 21 to 23 electrically connected to the plug 12 of the table tap 11 includes switches 31 to 33 which are contact opening / closing means that are closed by turning on the power based on the turning-on command, and the switches 31 to 33 are closed. Sensors 41 to 43 serving as current detection means for detecting convergence of the generated inrush current are provided, and the table tap 11 receives a command to input any one of the outlets 21 to 23 among the plurality of outlets 21 to 23. The power-on information based on power-on and the inrush current convergence information from the already-powered outlets 21 to 23 are exchanged between the plurality of outlets 21 to 23, so that the remaining amount of time after the random standby time has elapsed. An IC chip 51 as communication control means for selectively closing the switches 31 to 33 of the outlets 21 to 23 is provided.

  The IC chip 51 includes a communication function for exchanging power-on information and inrush current convergence information between the outlets 21 to 23, a random number generation function for generating a random standby time, Based on the power-on information and the inrush current convergence information, it has a control function for closing the switches 31 to 33 of the outlets 21 to 23 after the random standby time has elapsed, and has a structure built in the table tap 11.

  Here, the “loading command” means, for example, that various types of load devices (not shown) are connected to the outlets 21 to 23, such as sensors provided on the outlets 21 to 23 or the table tap 11. It means information obtained by detecting by means. “Power-on” means that power is supplied to the load device from the plug 12 of the table tap 11 via the outlets 21 to 23 by closing the switches 31 to 33.

  The IC chip 51 in this inrush current overlap avoidance system includes a plurality of pieces of power-on information by turning on power based on a turn-on command to one outlet 21 to 23, and inrush current convergence information from the already-on outlets 21 to 23. Exchange between the outlets 21 to 23, that is, as shown in FIG. 2, the power-on information A and the inrush current convergence information B are transmitted (broadcast) between the plurality of outlets 21 to 23. Thus, an autonomous distributed system that does not depend on a server as in the past can be constructed with a simple configuration. Note that the power-on information A and the inrush current convergence information B may be transferred either by wire or wireless.

  Further, the IC chip 51 selectively closes the switches 31 to 33 of the remaining outlets 21 to 23 after the random standby time has elapsed. Thus, based on the exchange of the power-on information A and the inrush current convergence information B between the plurality of outlets 21 to 23, the timing for closing the switches 31 to 33 of the remaining outlets 21 to 23 is random. Overlapping inrush currents can be suppressed by shifting with the lapse of the standby time. In addition, since the standby time is set at random, the probability of closing the switches 31 to 33 of the outlets 21 to 23 is very low, and the timing can be shifted with a sufficiently high probability. It is.

  In the inrush current overlap avoidance system having the above-described configuration, the remaining outlets 21 to 21 after the elapse of a random standby time based on the exchange of the power-on information A and the inrush current convergence information B between the plurality of outlets 21 to 23. A specific procedure (algorithm) for selectively closing the 23 switches 31 to 33 is illustrated in FIGS. 3 and 4.

  First, in the inrush current overlap avoidance system shown in FIG. 3, the connection to any one of the three outlets 21 to 23 (hereinafter referred to as the first to third outlets), for example, the first outlet 21 is performed. When a turn-on command is issued, the IC chip 51 closes the switch 31 of the first outlet 21 based on the turn-on command and turns on the power. The IC chip 51 transmits the power-on information A by this power-on to the second outlet 22 and the third outlet 23 which are the remaining outlets, and it is confirmed that an inrush current is generated by the transmission of the power-on information A. Information is transmitted to the second outlet 22 and the third outlet 23.

  Then, when an input command is given to either the second outlet 22 or the third outlet 23, the second outlet 22 or the second outlet 22 until a random waiting time T preset in the IC chip 51 elapses. The power-on of the third outlet 23 is suspended and put into a standby state. Thereafter, when the sensor 41 detects that the inrush current generated at the first outlet 21 has converged, the IC chip 51 obtains the inrush current convergence information B from the first outlet 21 that has been turned on. To the outlet 22 and the third outlet 23. At the second outlet 22 or the third outlet 23, either the second outlet 22 or the third outlet 23 to which the input command has been issued after the point of time when the inrush current convergence information B of the first outlet 21 is received. The switches 32 and 33 are closed and the power is turned on.

  If the inrush current convergence information B from the first outlet 21 is not received at the time of turning on the power, it is treated as a turn-on command without turning on the power, and the random waiting time T elapses again. The waiting state is continued until. As described above, in the inrush current overlap avoidance system of FIG. 3, the random standby time T is set to start from the input command to any of the first to third outlets 21 to 23.

  When the second outlet 22 that has received the inrush current convergence information B from the first outlet 21 is turned on, the power-on information A by the power-on is obtained from the first outlet 21 and the third outlet 23. Send to. Further, when the power is turned on for the third outlet 23 that has received the inrush current convergence information from the first outlet 21, the power-on information A by the power-on is obtained from the first outlet 21 and the second outlet. 22 to send.

  Next, in the inrush current overlap avoidance system shown in FIG. 4, when an input command is given to any one of the first to third outlets 21 to 23, for example, the first outlet 21, the input is made. Based on the command, the switch 31 of the first outlet 21 is closed by the IC chip 51 and the power is turned on. The IC chip 51 transmits the power-on information A by this power-on to the second outlet 22 and the third outlet 23 which are the remaining outlets, and it is confirmed that an inrush current is generated by the transmission of the power-on information A. Information is transmitted to the second outlet 22 and the third outlet 23.

  Thereafter, it is detected by the sensor 41 that the inrush current generated in the first outlet 21 has converged, and the inrush current convergence information B from the first outlet 21 that has been turned on is obtained as the second outlet 22 and the third outlet. Send to outlet 23. In the meantime, even if an input command to either the second outlet 22 or the third outlet 23 is made, the standby state is maintained until the inrush current convergence information B from the first outlet 21 is received, and the second outlet The power on of the outlet 22 or the third outlet 23 is suspended.

  Then, from the time when the inrush current convergence information B is received from the first outlet 21 until the random standby time T preset in the IC chip 51 elapses, the second outlet 22 or the third outlet 23 Suspend power on and continue standby. After the random waiting time T elapses, the switches 32 and 33 are closed for either the second outlet 22 or the third outlet 23 for which the input command has been issued, and the power is turned on. As described above, in the inrush current overlap avoidance system of FIG. 4, the random standby time T is set to start from the time when the inrush current convergence information B is received from the outlets 21 to 23 that are already turned on.

  When power is turned on for the second outlet 22 that has received the inrush current convergence information B from the first outlet 21, the power-on information A for the first outlet 21 and the third outlet 22 is obtained. Send to outlet 23. Further, when the power is turned on for the third outlet 23 that has received the inrush current convergence information B from the first outlet 21, the power-on information A by the power-on is obtained from the first outlet 21 and the second outlet 23. Send to outlet 22.

  As in the inrush current overlap avoidance system of FIGS. 3 and 4 described above, the remaining outlet 21 is based on the exchange of the power-on information A and the inrush current convergence information B between the plurality of outlets 21 to 23. The timing of closing the switches 31 to 33 of ˜23 can be shifted by the random standby time T, and the overlap of inrush currents can be avoided with a sufficiently high probability. The inrush current overlap avoidance system of FIG. 4 has a longer waiting time than that of the inrush current overlap avoidance system of FIG. 3, but the inrush current overlap can be avoided with a higher probability.

  In the above embodiment, the case where the first outlet 21 is first turned on has been described, but the same applies to the case where the second outlet 22 or the third outlet 23 is first turned on. Therefore, redundant description is omitted.

  The present invention is not limited to the above-described embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. It includes the equivalent meanings recited in the claims and the equivalents recited in the claims, and all modifications within the scope.

21-23 Electrical equipment (outlet)
31-33 Contact switching means (switch)
41-43 Current detection means (sensor)
51 Communication control means (IC chip)
A Power-on information B Inrush current convergence information T Random standby time

Claims (5)

  A plurality of electrical devices having contact opening / closing means that closes upon power-on based on a turn-on command and current detection means that detects convergence of an inrush current generated by closing the contact opening / closing means; A system for avoiding overlapping of inrush currents due to simultaneous power-on, information on power-on by power-on based on the power-on command to any one of a plurality of electric devices, and electric devices that have been powered on The communication control means for selectively closing the contact opening / closing means of the remaining electrical equipment after the random standby time has elapsed by exchanging the inrush current convergence information from the plurality of electrical equipment with each other Inrush current overlap avoidance system characterized by that.   The communication control means transmits power-on information by power-on based on the power-on command to any one of a plurality of electric devices to the remaining electric devices, and sends to any of the remaining electric devices Suspend the power-on of the remaining electrical equipment until at least a random waiting time elapses from the power-on command, and turn on the remaining electrical equipment after receiving the inrush current convergence information from the powered-on electrical equipment The inrush current overlap avoidance system according to claim 1, wherein the contact opening / closing means is closed by turning on the power supply for the electrical equipment that has been commanded.   The inrush current overlap avoidance system according to claim 1 or 2, wherein the communication control means starts a random standby time from a turn-on command to any of the remaining electrical devices.   3. The inrush current overlap avoidance system according to claim 1, wherein the communication control unit starts the random standby time from the time when the inrush current convergence information is received from the power-on electric device.   The inrush current overlap avoidance system according to any one of claims 1 to 4, wherein the electrical device is an outlet disposed on a table tap.

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