JP5896961B2 - Electric leakage detection device, electric leakage detection method, and program - Google Patents

Description

  The present invention relates to a leakage detection device, a leakage detection method, and a program for detecting leakage due to a tracking phenomenon.

  When power is supplied from an AC power source to an electrical device, current leakage may occur due to a tracking phenomenon. The tracking phenomenon is a phenomenon in which dust accumulates in the gap between the plug and the outlet, the dust is wet and conductive, the dust is carbonized over time, and the carbonized portion is short-circuited and ignited.

  Currently, various techniques for detecting leakage due to a tracking phenomenon are known. For example, Patent Document 1 discloses a tracking detection device including a standby / stop detection circuit that detects that a load device is in a standby state or a stopped state, and a tracking determination circuit that determines the presence or absence of tracking discharge. Yes. The tracking determination circuit disclosed in Patent Document 1 detects whether or not a tracking discharge has occurred only when the load device is in a standby state or a stopped state with low power consumption in order to prevent erroneous detection due to power consumption of the load device. judge.

JP 2007-101321 A

  However, there are some electric devices that are currently in widespread use, such as broadband routers and ventilating fans, where power is always consumed, and those that are intermittently operated throughout the year, such as refrigerators. . Such an electrical device is rarely in a standby state or a stopped state with low power consumption. The tracking detection device disclosed in Patent Document 1 is difficult to detect a leakage due to a tracking phenomenon with respect to such an electric device. For this reason, there is a demand for a leakage detection device suitable for detecting leakage due to the tracking phenomenon in a state where the electric device is consuming electric power.

  The present invention has been made in view of the above problems, and a leakage detection device, a leakage detection method, and a program suitable for detecting a leakage due to a tracking phenomenon in a state where an electric device consumes power. The purpose is to provide.

In order to achieve the above object, an electrical leakage detection apparatus according to the present invention includes:
Current measuring means for measuring a current flowing through an electric circuit for supplying an alternating current to an electric device;
Based on the current measured by the current measuring means, a predicted stable period in which the fluctuation value of the power consumed by the electrical device is predicted to be equal to or less than a predetermined threshold is divided for each cycle of the alternating current. Based on the number of effective values whose difference from the average value of the effective values for each cycle period is equal to or greater than a predetermined threshold among the effective values of the current flowing through the electric circuit for each cycle period obtained by A leakage presence / absence determination result output means for outputting a determination result of the presence / absence of leakage due to a tracking phenomenon , and
The said predicted stabilization period, the electric device is Ru contains periods which are predicted to be the operating state that consumes power than the standby state and the stop state.

  According to the present invention, the presence or absence of leakage due to the tracking phenomenon is determined based on the current flowing in the electric circuit during the predicted stable period in which the power consumed by the electric device is predicted to be stable. Therefore, according to the present invention, it is possible to detect a leakage due to the tracking phenomenon in a state where the electric device consumes power.

It is a lineblock diagram of a leak detection system concerning a 1st embodiment of the present invention. It is a lineblock diagram of a leak detection device concerning a 1st embodiment of the present invention. It is a figure for demonstrating the function of the leak detection apparatus which concerns on the 1st Embodiment of this invention. (A) is a figure which shows the value of the electric current which flows into an electric equipment. (B) is a figure which shows the value of the voltage applied to an electric equipment. (A) is a figure which shows the value of the tracking current in the initial stage of a tracking phenomenon. (B) is a figure which shows the value of the tracking current in the last stage of a tracking phenomenon. It is a figure for demonstrating a non-real stable period and a real stable period. It is a flowchart which shows the leak detection process which the leak detection apparatus which concerns on the 1st Embodiment of this invention performs. It is a flowchart which shows the prediction stable period setting process shown in FIG. It is a block diagram of the earth-leakage detection system which concerns on the 2nd Embodiment of this invention. It is a figure for demonstrating the function of the leak detection apparatus which concerns on the 2nd Embodiment of this invention. It is a flowchart which shows the prediction stable period setting process which the leak detection apparatus which concerns on the 2nd Embodiment of this invention performs.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
First, the leakage detection system 1000 according to the first embodiment of the present invention will be described. The leakage detection system 1000 is a system that detects a leakage due to a tracking phenomenon that occurs near the contact surface between the plug 210 and the outlet 330. The tracking phenomenon is a phenomenon in which dust accumulates in the gap between the plug 210 and the outlet 330, the dust is wet and conductive, the dust is carbonized over time, and the carbonized portion is short-circuited and ignited. The leakage detection system 1000 is a system suitable for detecting this tracking phenomenon at an early stage as much as possible and preventing accidents such as fires. In FIG. 1, the tracking phenomenon occurs in a section indicated by a dashed arrow.

  The leakage detection system 1000 includes a leakage detection device 100, two electrical devices 200, a distribution board 300, and an alarm device 500.

  The leakage detection device 100 detects a leakage due to a tracking phenomenon based on the current flowing in the circuit and the potential difference between the circuits. Hereinafter, “leakage due to tracking phenomenon” is simply referred to as “leakage” as appropriate. When the leakage detection device 100 detects a leakage, the leakage detection device 100 supplies a branch instruction signal to the branch breaker 320 and causes the branch breaker 320 to cut off the electric circuit. In addition, when the leakage detection device 100 detects a leakage, the leakage detection device 100 supplies an alarm instruction signal to the alarm device 500 to notify the alarm device 500 that the leakage has been detected.

  The electric device 200 operates with electric power supplied from the electric circuit via the plug 210. The electric device 200 includes a plug 210 that is inserted into the outlet 330. The electric device 200 is a broadband router, an air conditioner, a water heater, an electric stove, a rice cooker, a lighting device, an electric carpet, or the like.

  The distribution board 300 is a box in which devices for distributing electric power are collected so that electric power supplied from an electric power company or the like can be used safely within a consumer. The distribution board 300 includes a main breaker 310 and four branch breakers 320.

  The main breaker 310 distributes the power supplied from an electric power company or the like to the branch breaker 320. The main breaker 310 has a function of cutting off the supply of electric power to the customer when a leakage is detected. For example, the main breaker 310 determines whether the value of the current sent to the branch breaker 320 via the electric wire 401 and the value of the current flowing from the branch breaker 320 via the electric wire 403 are equal to or greater than a predetermined threshold value. Whether or not there is a leakage is determined. The main breaker 310 cannot basically detect a leakage due to a tracking phenomenon. This is because the current (hereinafter referred to as “tracking current”) sent from the main breaker 310 to the branch breaker 320 due to the tracking phenomenon returns from the branch breaker 320 to the main breaker 310.

  In the present embodiment, electric power is supplied to the customer in a single-phase three-wire system using three electric wires: an electric wire 401 (L1 phase), an electric wire 402 (L2 phase), and an electric wire 403 (N phase). To do. Note that the potential difference between the L1 phase and the N phase and the potential difference between the L2 phase and the N phase are both 100 V (effective value). On the other hand, the potential difference between the L1 phase and the L2 phase is 200 V (effective value). In the present embodiment, of the four branch breakers 320, two branch breakers 320 are connected to the main breaker 310 by the electric wires 401 and 403. Of the four branch breakers 320, the other two branch breakers 320 are connected to the main breaker 310 by the electric wires 402 and 403.

  The two branch breakers 320 supply the electric power supplied from the main breaker 310 to one of the two electric devices 200 via the electric wires 401 and 403. The other two branch breakers 320 supply the electric power supplied from the main breaker 310 to the other electric devices 200 out of the two electric devices 200 via the electric wires 402 and 403.

  Here, the wattmeter 17 included in the leakage detection device 100 includes a current detection unit 171, a current detection unit 172, a potential detection unit 173, a potential detection unit 174, and a potential detection unit 175. The current detection unit 171 detects the L1 phase current (current flowing through the electric wire 401). The current detection unit 172 detects an L2 phase current (current flowing through the electric wire 402). The potential detection unit 173 detects the L1 phase potential (the potential of the electric wire 401). The potential detector 174 detects the L2 phase potential (the potential of the electric wire 402). The potential detector 175 detects the N-phase potential (the potential of the electric wire 403).

  One of the two outlets 330 is connected to the branch breaker 320 by an electric wire 401 and an electric wire 403. When the plug 210 is inserted, the one outlet 330 applies a potential difference between the L1 phase potential and the N phase potential between two terminals of the plug 210. Of the two outlets 330, the other outlet 330 is connected to the branch breaker 320 by an electric wire 402 and an electric wire 403. When the plug 210 is inserted, the other outlet 330 applies a potential difference between the L2 phase potential and the N phase potential between the two terminals of the plug 210.

  The alarm device 500 warns that a leak has occurred in accordance with the alarm instruction signal received from the leak detection device 100. The alarm device 500 notifies the user that a leakage has occurred, for example, by sound, voice, or screen display. The alarm device 500 includes, for example, a speaker and a liquid crystal display.

  Next, with reference to FIG. 2, the physical configuration of the leakage detection device 100 will be described. As shown in FIG. 2, the leakage detection device 100 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a flash memory 14, an RTC (Real Time Clock) 15, a touch. A screen 16, a power meter 17, a power meter interface 18, an external device interface 19, and a home telecommunications network interface 20 are provided. The components included in the leakage detection device 100 are connected to each other via a bus.

  The CPU 11 controls the overall operation of the leakage detection device 100. The CPU 11 operates according to a program stored in the ROM 12 and uses the RAM 13 as a work area.

  The ROM 12 stores a program and data for controlling the overall operation of the leakage detection device 100.

  The RAM 13 functions as a work area for the CPU 11. That is, the CPU 11 temporarily writes programs and data in the RAM 13 and refers to these programs and data as appropriate.

  The flash memory 14 is a nonvolatile memory that stores various types of information. For example, the flash memory 14 stores information indicating the actual stable period, information indicating the non-actual stable period, information indicating the predicted stable period, and the like.

  The RTC 15 is a time measuring device. The RTC 15 includes, for example, a battery and keeps timing while the power supply of the leakage detection device 100 is turned off. The RTC 15 includes an oscillation circuit including a crystal oscillator, for example.

  The touch screen 16 detects a touch operation performed by the user and supplies a signal indicating the detection result to the CPU 11. The touch screen 16 displays an image based on the image signal supplied from the CPU 11 or the like. As described above, the touch screen 16 functions as a user interface of the leakage detection device 100.

  The wattmeter 17 measures the electric power supplied from the main breaker 310 to the consumer. As described above, the wattmeter 17 includes the current detection unit 171, the current detection unit 172, the potential detection unit 173, the potential detection unit 174, and the potential detection unit 175. Therefore, the wattmeter 17 has a current measurement function for measuring a current flowing through each phase and a voltage measurement function for measuring a potential difference between the phases. Moreover, the wattmeter 17 calculates a power value based on the measured current value and the measured voltage value. The power meter 17 supplies current value information indicating the measured current value, voltage value information indicating the measured voltage value, and power value information indicating the measured power value to the power meter interface 18. Note that the sampling period of the wattmeter 17 is sufficiently shorter than the period of the alternating current supplied to the consumer.

  The power meter interface 18 is an interface for connecting the power meter 17 to each component included in the leakage detection device 100. The wattmeter interface 18 includes a buffer memory that stores the current value information, voltage value information, and power value information supplied from the wattmeter 17 for a predetermined period in association with the measurement time. The wattmeter interface 18 supplies current value information, voltage value information, and power value information stored in the buffer memory to the CPU 11, RAM 13, flash memory 14, etc. automatically or in accordance with instructions from the CPU 11. Can do.

  The external device interface 19 is an interface for connecting the branch breaker 320 and the alarm device 500 to the leakage detection device 100. The external device interface 19 supplies a cutoff instruction signal to the branch breaker 320 under the control of the CPU 11. Further, the external device interface 19 supplies an alarm instruction signal to the alarm device 500 according to control by the CPU 11. The external device interface 19 is, for example, a LAN interface for connecting to a wireless LAN such as a wired LAN (Local Area Network), Wi-Fi (Wireless Fidelity), specific low power radio, or RS (Recommended-Standards)- 232C, RS-485, USB (Universal Serial Bus), IEEE (Institute of Electrical and Electronic Engineers) 1394 and other interfaces for serial communication.

  The home telecommunications network interface 20 is an interface for connecting the leakage detection device 100 to the home telecommunications network. The home telecommunications network interface 20 includes a LAN interface such as a NIC (Network Interface Card).

  Next, with reference to FIG. 3, the basic function of the leakage detection apparatus 100 will be described. The leakage detection device 100 functionally includes a current measurement unit 101, a predicted stable period setting unit 102, an effective value acquisition unit 103, a leakage presence / absence determination unit 104, a voltage measurement unit 105, an actual stable period detection unit 106, and an unstable notification. Unit 107, electric circuit interruption unit 108, and leakage notification unit 109.

  The current measuring unit 101 measures a current flowing through an electric circuit for supplying an alternating current to the electric device 200. This electric circuit is an electric wire 401 or an electric wire 402. The current measurement unit 101 includes, for example, a current detection unit 171, a current detection unit 172, and a wattmeter 17.

  The predicted stable period setting unit 102 sets a predicted stable period in which the power consumed by the electric device 200 is predicted to be stable. The predicted stable period setting unit 102 can set the predicted stable period based on, for example, the record of the power consumed by the electric device 200 and the schedule of the operation mode (operation mode) of the electric device 200. The predicted stable period setting unit 102 includes, for example, a CPU 11.

  The effective value acquisition unit 103 is based on the current measured by the current measurement unit 101 for each cycle period obtained by dividing the predicted stable period set by the predicted stabilization period setting unit 102 for each AC current cycle. The effective value of the current flowing through the electric circuit is obtained. The effective value acquisition unit 103 includes, for example, a CPU 11.

  Leakage presence / absence discriminating unit 104 has an effective value in which a difference from an average value of effective values obtained for each cycle period is equal to or greater than a predetermined threshold among effective values obtained for each cycle period by effective value acquisition unit 103. Based on the number of values, the presence / absence of leakage due to the tracking phenomenon is determined. For example, the leakage detection unit 104 includes a CPU 11.

  The voltage measuring unit 105 measures the voltage applied to the electric device 200. The voltage measurement unit 105 includes, for example, a potential detection unit 173, a potential detection unit 174, a potential detection unit 175, and a wattmeter 17.

  Based on the current measured by the current measurement unit 101 and the voltage measured by the voltage measurement unit 105, the actual stable period detection unit 106 has a fluctuation value of the power consumed by the electric device 200 equal to or less than a predetermined threshold. The actual stable period is detected. The actual stable period detection unit 106 includes, for example, a CPU 11.

  Here, the predicted stable period setting unit 102 can set a period corresponding to the actual stable period detected by the actual stable period detecting unit 106 as the predicted stable period. The period corresponding to the actual stable period is, for example, the same period as the actual stable period, a part of the actual stable period, the period of the same time zone as the actual stable period on a different day from the actual stable period, the actual The period immediately before the stable period and the period immediately after the actual stable period.

  Typically, the predicted stable period setting unit 102 sets a period in the same time zone as the actual stable period that arrives after the actual stable period detected by the actual stable period detection unit 106 as the predicted stable period.

  Alternatively, the predicted stable period setting unit 102 sets the actual stable period detected by the actual stable period detecting unit 106 as the predicted stable period.

  The non-stable notification unit 107 notifies the user that the actual stable period is not detected when the actual stable period detection unit 106 does not detect the actual stable period for a predetermined time or longer. The unstable notification unit 107 includes, for example, a CPU 11, a touch screen 16, and an external device interface 19.

  The electric circuit interruption unit 108 causes the branch breaker 320 incorporated in the electric circuit to interrupt the electric circuit when the electric leakage detection unit 104 determines that there is an electric leakage due to the tracking phenomenon. The electric circuit interruption unit 108 includes, for example, a CPU 11 and an external device interface 19.

  If the leakage detection unit 109 determines that there is a leakage due to the tracking phenomenon, the leakage notification unit 109 notifies the user that there is a leakage due to the tracking phenomenon. The leakage notification unit 109 includes, for example, a CPU 11, a touch screen 16, and an external device interface 19.

  Next, with reference to FIG. 4, the value of the current flowing through the electric device 200 and the value of the voltage applied to the electric device 200 will be described. FIG. 4A is a diagram illustrating a state in which the value of the current flowing through the electric device 200 changes with time. FIG. 4B is a diagram illustrating how the value of the voltage applied to the electric device 200 changes with the passage of time.

  As shown in FIG. 4A, the value of the current flowing through the electric device 200 changes periodically with the passage of time. Here, the value of the current flowing through the electric device 200 changes within a period of one cycle (hereinafter referred to as “one cycle period”) according to the load of the electric device 200, the operation mode of the electric device 200, and the like. . However, basically, when the operation mode of the electric device 200 is not changed, the value of the current flowing through the electric device 200 changes in substantially the same manner within any one cycle period. That is, when the operation mode of the electric device 200 is not changed, the waveform indicating the value of the current flowing through the electric device 200 is substantially the same in any one cycle period.

  In the present embodiment, the frequency of the AC power supply is 50 Hz, and the cycle of the AC power supply is 20 msec. Here, FIG. 4A shows the effective value of the current for each cycle period even when the effective value of the current in one cycle period is about several amperes when the operation mode of the electric device 200 is not changed. The difference is an example where the magnitude is about several tens of milliamps.

  Further, as shown in FIG. 4B, the value of the voltage applied to the electric device 200 changes periodically with the passage of time. The value of the voltage applied to the electric device 200 is basically a value represented by a sine function without depending on the load of the electric device 200 or the operation mode of the electric device 200. The phase difference between the waveform indicating the value of the current flowing through the electric device 200 and the waveform indicating the value of the voltage applied to the electric device 200 is basically the load of the electric device 200 and the operation of the electric device 200. Depends on mode etc.

  Next, with reference to FIG. 5, the value of the tracking current generated by the tracking phenomenon will be described. FIG. 5A is a diagram showing how the value of the tracking current changes with time in the initial stage of the tracking phenomenon. FIG. 5B is a diagram illustrating a state in which the value of the tracking current changes with time in the final stage of the tracking phenomenon.

  As shown in FIG. 5A, in the initial stage of the tracking phenomenon, a tracking current with a relatively small value (for example, about several hundred milliamperes) rarely flows according to the change in the voltage of the AC power supply. Note that the initial stage of the tracking phenomenon is a stage in which, for example, the two terminals of the plug 210 are short-circuited by a dusty dust between the plug 210 and the outlet 330 to scatter a spark.

  On the other hand, as shown in FIG. 5B, at the final stage of the tracking phenomenon, a tracking current having a relatively large value (for example, about several amperes) frequently flows according to the change in the voltage of the AC power supply. In the final stage of the tracking phenomenon, for example, carbonization of the housing portion of the plug 210 or the outlet 330 progresses, and the two terminals of the plug 210 are frequently short-circuited to ignite or immediately before firing. It is a stage.

  In addition, the electric current which flows into the electric equipment 200, and the tracking current flow through the electric circuit in an overlapping manner. Here, when the operation mode of the electric device 200 is not changed, the effective value of the current flowing through the electric device 200 is almost the same in any one cycle period. For this reason, it can be considered that the variation in the effective value of the current flowing through the electric circuit, which is obtained every one cycle period, is caused by the tracking current.

  Next, the non-actual stable period and the actual stable period will be described with reference to FIG.

  As shown in FIG. 6, the non-real stable period is a period in which the actually measured fluctuation value of the power consumption of the electric device 200 exceeds a predetermined threshold (for example, 50 watts). The non-real stability period is typically a period including a time when the electric device 200 is turned on and a time when the operation mode of the electric device 200 is switched. Thus, the non-actual stable period is a period including a time when the power consumption of the electric device 200 has actually changed significantly.

  On the other hand, as shown in FIG. 6, the actual stable period is a period in which the actually measured fluctuation value of the power consumption of the electric device 200 is equal to or less than a predetermined threshold. The actual stable period is typically a period that does not include the time when the electric device 200 is turned on or the time when the operation mode of the electric device 200 is switched. Thus, the actual stable period is a period that does not include the time at which the power consumption of the electric device 200 actually changes significantly.

  In the present embodiment, the leakage detection device 100 determines whether the check target period is an unreal stable period or an actual stable period at the check time when the check target period of a predetermined time length (for example, 10 seconds) ends. Is determined. Specifically, the leakage detection apparatus 100 determines that the difference between the maximum power consumption measured during the check target period and the minimum power consumption measured during the check target period is equal to or less than a predetermined threshold. When it is determined that there is, it is determined that the check target period is an actual stable period. On the other hand, when it is determined that the difference exceeds a predetermined threshold, the leakage detection device 100 determines that the check target period is an unreal stability period.

  In the present embodiment, while the leakage detection device 100 is operating, the check time comes every predetermined cycle (for example, 10 seconds), and any time is included in any of the check target periods. For example, it is assumed that one day includes 24 (hours) × 60 (minutes) × 60 (seconds) / 10 (seconds) = 8640 check target periods.

  FIG. 6 illustrates an example in which the first check target period includes a time when the power consumption of the electric device 200 is significantly changed by switching the operation mode of the electric device 200 and is determined to be an unreal stability period. FIG. 6 illustrates an example in which the next check target period is a period in which the power consumption of the electric device 200 is stable and is determined to be an actual stable period.

  Note that the predetermined period (the length of the check target period) can be adjusted as appropriate according to the type of the electric device 200 and the like. For example, home appliances including a mechanical system such as a vacuum cleaner require about 5 seconds to stabilize power consumption when the operation mode is changed. Therefore, the predetermined cycle can be set to a period of about 10 seconds so that a period in which power consumption is not stable can be efficiently avoided.

  Next, with reference to the flowchart shown in FIG. 7, the leakage detection process which the leakage detection apparatus 100 performs is demonstrated. In addition, in response to the power being turned on, leakage detection device 100 starts the leakage detection process shown in FIG.

  First, the CPU 11 starts measuring current, voltage, and power (step S101). For example, the CPU 11 supplies a measurement start instruction signal to the wattmeter 17 via the wattmeter interface 18. On the other hand, the wattmeter 17 starts measuring current, voltage, and power in response to the supply of the measurement start instruction signal.

  Here, the wattmeter interface 18 associates the current value information, the voltage value information, and the power value information supplied from the wattmeter 17 with the measurement time, and starts a process of storing them in the buffer memory. The power meter interface 18 can acquire the measurement time (current time) with reference to the RTC 15. Further, the buffer memory stores information for a time longer than the time length (for example, 10 seconds) of the check target period.

  When completing the process in step S101, the CPU 11 executes a predicted stable period setting process (step S102). The predicted stable period setting process will be described in detail with reference to the flowchart shown in FIG.

  First, the CPU 11 determines whether or not the current time is a check time (step S201). The check time is a time for checking whether or not the power consumed in the check target period is stable. In this embodiment, the check time is a time that arrives every 10 seconds. For example, the CPU 11 can determine whether or not the current time is the check time based on the current time indicated by the RTC 15.

  When determining that the current time is not the check time (step S201: NO), the CPU 11 completes the predicted stable period setting process. On the other hand, when the CPU 11 determines that the current time is the check time (step S201: YES), the CPU 11 calculates the fluctuation range of the power during the check target period (step S202).

  Specifically, first, the CPU 11 acquires power value information for a check target period stored in a buffer memory included in the power meter interface 18. Then, the CPU 11 obtains a difference (variation width) between the maximum power value in the check target period and the minimum power value in the check target period based on the acquired power value information.

  When completing the process in step S202, the CPU 11 determines whether or not the power fluctuation range is equal to or less than a predetermined threshold (step S203). Note that the predetermined threshold can be adjusted based on power consumption or the like when the electric device 200 is operating.

  If the CPU 11 determines that the fluctuation range of the electric power is not equal to or less than the predetermined threshold (step S203: NO), the CPU 11 sets the check target period to an unreal stability period (step S204). For example, the CPU 11 can set the check target period to the non-real stable period by updating the actual stable period specifying information stored in the flash memory 14 or the like. The actual stable period specification information includes, for example, the start time (year / month / day / hour / minute / second) of the check target period, the end time (year / month / day / hour / minute / second) of the check target period, and the determination result (actual stable period, non-real stable period Or unidentified).

  When completing the process of step S204, the CPU 11 determines whether or not a predetermined time has elapsed without setting the actual stable period (step S205). For example, the CPU 11 refers to the actual stable period specifying information stored in the flash memory 14 or the like, and specifies the latest end time among the end times of the check target period associated with the determination result that is the actual stable period. To do. And CPU11 discriminate | determines whether the time difference of the newest last time specified and the present time exceeds predetermined time.

  If the CPU 11 determines that the predetermined time has not elapsed since the actual stable period has not been set (step S205: NO), the CPU 11 completes the predicted stable period setting process. On the other hand, when the CPU 11 determines that a predetermined time has elapsed without setting the actual stable period (step S205: YES), the CPU 11 notifies that the actual stable period is not detected (step S206).

  Note that the predetermined time can be appropriately adjusted depending on the type of the electric device 200 and the like. For example, when the electric device 200 is a vacuum cleaner, the average continuous operation time is considered to be about 5 minutes. And the vacuum cleaner may fluctuate in power consumption depending on the state of the floor surface during operation. Therefore, the predetermined time can be set to about 10 minutes. In this case, when the power consumption of the vacuum cleaner is not stable for 10 minutes or more, it is considered that there is a poor contact between the plug 210 and the outlet 330. Therefore, the CPU 11 notifies that a predetermined time has elapsed without setting the actual stable period.

  For example, the CPU 11 can control the touch screen 16 so as to display an image informing that the actual stable period is not detected. Alternatively, the CPU 11 can control the alarm device 500 so as to output a sound notifying that the actual stable period is not detected. In this case, the CPU 11 transmits an alarm instruction signal to the alarm device 500 via the external device interface 19. On the other hand, the alarm device 500 outputs a sound or a sound for notifying that the actual stable period is not detected according to the received alarm instruction signal. It is preferable that the CPU 11 controls the alarm device 500 so that different sounds and sounds are output when the actual stable period is not detected and when a leakage is detected. When completing the process in step S206, the CPU 11 completes the predicted stable period setting process.

  When determining that the power fluctuation value is equal to or less than the predetermined threshold (step S203: YES), the CPU 11 sets the check target period to the actual stable period (step S207). For example, the CPU 11 can set the check target period to the non-real stable period by updating the actual stable period specifying information stored in the flash memory 14 or the like.

  When completing the process of step S207, the CPU 11 sets a predicted stable period based on the actual stable period (step S208). Note that the CPU 11 can set the predicted stable period based on the actual stable period specifying information stored in the flash memory 14 or the like. The method by which the CPU 11 sets the predicted stable period can be adjusted as appropriate.

  Note that the predicted stable period is a period in which the power consumed by the electric device 200 is predicted to be stable, and is a period that is unlikely to be erroneously detected even if an attempt is made to detect leakage. Therefore, the CPU 11 refers to the actual stable period specifying information indicating the past performance related to the fluctuation of the power consumption, and sets the period during which the power consumption of the electric device 200 is unlikely to fluctuate as the predicted stable period.

  For example, when it is desired to check for electric leakage once a day, a time zone having the highest ratio set in the actual stable period can be set as the predicted stable period. For example, if the time period with the highest percentage set for the actual stable period is a period from 02:00 am to 02:00 am 10 seconds in the day, 02:00 am every day A period from 00:00 to 02:00:10 is set as the predicted stable period.

  In addition, for example, when it is desired to check for electric leakage once an hour, a time zone having the highest ratio set in the actual stable period can be set as the predicted stable period every hour. For example, among the one hour from 00:00:00 am to 01:00 am 00 seconds, the time period with the highest percentage set for the actual stable period is 00:30:30 am to 00 am In the case of the period from 30:30 to 10 seconds, the daily period from 00:30:30 to 00:30:10 is set as the predicted stable period. Also, for example, among the one hour from 01:00 a.m. to 02:00 a.m., the time period with the highest percentage set for the actual stable period is from 01:40:00 a.m. When the period is from 01:40:10 am, the period from 01:40:00 am to 01:40:10 am every day is set as the predicted stable period. Hereinafter, similarly, a predicted stable period is set every hour.

  For example, the CPU 11 can store, in the flash memory 14, predicted stable period specifying information for specifying the set predicted stable period. The predicted stable period specifying information is, for example, information that associates the start time (year / month / day / hour / minute / second) of the predicted stable period with the end time (year / month / day / hour / minute / second) of the predicted stable period. When completing the process in step S208, the CPU 11 completes the predicted stable period setting process.

  When completing the process of Step S102 (predicted stable period setting process), the CPU 11 determines whether or not the current time is the end time of the predicted stable period (Step S103). For example, the CPU 11 determines whether or not the current time acquired from the RTC 15 matches any of the end times of the predicted stable period specified by the predicted stable period specifying information stored in the flash memory 14.

  If the CPU 11 determines that the current time is not the end time of the predicted stable period (step S103: NO), the process returns to step S102. On the other hand, when the CPU 11 determines that the current time is the end time of the predicted stable period (step S103: YES), the CPU 11 calculates the effective value of the current for each cycle period within the predicted stable period (step S104). Specifically, the CPU 11 stores, based on the current value information in the predicted stable period, stored in the buffer memory included in the power meter interface 18, for each of all one cycle periods included in the predicted stable period. Find the effective value of the current. The effective value is, for example, RMS (Root Mean Square). The CPU 11 stores the obtained effective value of the current for each cycle period in the flash memory 14.

  CPU11 will calculate the average value of the effective value of the electric current for every cycle period within a prediction stable period, if the process of step S104 is completed (step S105). By this process, the average value of the effective value of the current within the predicted stable period is calculated. The CPU 11 stores the average value of the calculated effective values in the flash memory 14.

  When completing the process in step S105, the CPU 11 determines whether or not one cycle period in which the effective value of the current is abnormal is equal to or greater than a predetermined number (step S106). The effective value of the current in each one-cycle period is determined to be abnormal when the difference from the average value of the effective values of the current is equal to or greater than a predetermined threshold value. The predetermined threshold and the predetermined number can be appropriately adjusted according to the type of the electric device 200, the power consumption during operation, and the like. If the tracking phenomenon is to be detected as early as possible, the predetermined threshold can be set to a small value and the predetermined number can be set to a small number. On the other hand, when it is desired to reduce the false detection of the tracking phenomenon as much as possible, the predetermined threshold value can be set to a large value and the predetermined number can be set to a large number.

  In addition, when the tracking current flows within one cycle period, it is estimated that the effective value of the current is determined to be abnormal. On the other hand, when the tracking current does not flow within one cycle period, it is estimated that the effective value of the current is not determined to be abnormal. That is, it is presumed that the cause of the abnormal current effective value is the tracking current.

  If the CPU 11 determines that one cycle period in which the effective value of the current is abnormal is not equal to or greater than the predetermined number (step S106: NO), the CPU 11 returns the process to step S102. On the other hand, when it is determined that one cycle period in which the effective value of the current is abnormal is equal to or greater than the predetermined number (step S106: YES), the CPU 11 notifies that there is a leakage (step S107).

  For example, the CPU 11 transmits an alarm instruction signal to the alarm device 500 via the external device interface 19. On the other hand, the alarm device 500 outputs a sound, a sound, or an image that informs the user that there is or is likely to be a leakage due to a tracking phenomenon, based on the received alarm instruction signal. The CPU 11 may supply an alarm instruction signal to the touch screen 16. In this case, the touch screen 16 displays an image informing the user that there is a leakage due to a tracking phenomenon in accordance with the supplied alarm instruction signal.

  CPU11 will interrupt | block an electric circuit, if the process of step S107 is completed (step S108). Specifically, the CPU 11 transmits a blocking instruction signal to the branch breaker 320 via the external device interface 19. On the other hand, branch breaker 320 cuts off the electric circuit according to the received cut-off instruction signal. Specifically, the branch breaker 320 divides the electric wire 401 and the electric wire 403 (or the electric wire 402 and the electric wire 403) connected between the main breaker 310 and the outlet 330, for example. When completing the process in step S108, the CPU 11 completes the leakage detection process.

  According to the present embodiment, the detection of leakage due to the tracking phenomenon is executed during the predicted stable period in which the power consumed by the electric device 200 is predicted to be stable. For this reason, according to the present embodiment, it is expected that the leakage due to the tracking phenomenon can be accurately detected even when the electric device 200 is consuming power.

  In addition, according to the present embodiment, a predicted stable period suitable for detecting a leakage is set based on the record of power consumed by the electric device 200, and the detection of the leakage is performed during the predicted stable period. For this reason, according to this embodiment, the improvement of the accuracy of detection of an electrical leakage can be further expected.

  Further, according to the present embodiment, the detection of leakage is performed in the same time period as the period when the fluctuation of the power actually consumed by the electric device 200 was small. For this reason, according to this embodiment, the improvement of the accuracy of detection of an electrical leakage can be further expected.

  Further, according to the present embodiment, the detection of leakage is performed during a period in which the fluctuation of the power actually consumed by the electric device 200 is small. For this reason, according to this embodiment, the improvement of the accuracy of detection of an electrical leakage can be further expected.

  In addition, according to the present embodiment, when it is not possible to detect a period in which the fluctuation of the power actually consumed by the electric device 200 is small, this is notified. For this reason, according to this embodiment, it can notify a user that it is an abnormal state where it is difficult to detect leakage, and it can be expected to reduce the risk of an accident or the like.

  Further, according to the present embodiment, when it is determined that there is a leakage, the electric circuit is interrupted. For this reason, according to this embodiment, it can be expected to reduce the risk of accidents such as fire.

  Further, according to the present embodiment, when it is determined that there is a leak, the user is notified that there is a leak. For this reason, according to this embodiment, it can be expected that the user can confirm the leakage check and reduce the risk of an accident such as a fire.

(Second Embodiment)
In the first embodiment, the example in which the period for detecting the electric leakage is determined based on the record of the power consumed by the electric device 200 has been described. In the present invention, the method for setting the period for detecting the leakage is not limited to this example. Hereinafter, in the second embodiment, an example in which a period for detecting a leakage is set based on operation state information indicating an operation state of the electric device 200 will be described. In addition, below, the part which the leak detection system 1100 which concerns on 2nd Embodiment differs from the leak detection system 1000 which concerns on 1st Embodiment fundamentally is demonstrated.

  FIG. 9 is a diagram illustrating a leakage detection system 1100 according to the second embodiment. As shown in FIG. 9, the earth leakage detection system 1100 includes an earth leakage detection device 150 instead of the earth leakage detection device 100, a point provided with a home control device 600, a point where the electric device 200 includes a communication adapter 220, and the like. Different from the detection system 1000.

  The leakage detection device 150 is the same as the leakage detection device 100 in terms of physical configuration. The leakage detection device 150 can communicate with the home control device 600 through the home telecommunication network interface 20. The leakage detection device 150 can exchange information with the home control device 600 via, for example, a home telecommunications network (not shown). Leakage detection device 150 can supply an interruption instruction signal and an alarm instruction signal to in-home control device 600. In addition, the leakage detection device 150 can acquire the operation state information indicating the operation state of the electric device 200 from the home control device 600.

  The communication adapter 220 is an interface for connecting the electric device 200 to the home control device 600. For example, the communication adapter 220 can exchange information with the home control device 600 via a home telecommunication network (not shown). In addition, the communication adapter 220 can exchange information with the electric device 200. The communication adapter 220 includes, for example, a computer including a communication IC (Integrated Circuit).

  The home control device 600 controls the leakage detection device 150, the communication adapter 220, the branch breaker 320, the alarm device 500, and the like according to a user instruction, an automatic program, and the like. For example, the home control device 600 can exchange information with the leakage detecting device 150, the communication adapter 220, the branch breaker 320, the alarm device 500, and the like via a home telecommunication network (not shown).

  The home control apparatus 600 can monitor and control the electric device 200. Therefore, the home control apparatus 600 can grasp the schedule of the operation mode of the electric device 200 in the present, the past, and the future. The home control apparatus 600 can create the operation state information including such a schedule by itself or obtain it from the electric device 200.

  The home control device 600 can transmit the operation state information to the leakage detection device 150 in accordance with a request from the leakage detection device 150 or automatically. In-home control device 600 can transmit the interruption instruction signal received from leakage detecting device 150 to branch breaker 320. Further, the home control device 600 can transmit the alarm instruction signal received from the leakage detection device 150 to the alarm device 500. Home control device 600 may be a dedicated computer or a general-purpose computer such as a personal computer.

  Next, with reference to FIG. 10, the function of the leakage detection apparatus 150 according to the second embodiment will be described.

  As illustrated in FIG. 12, the leakage detection device 150 functionally includes a current measurement unit 101, a predicted stable period setting unit 102, an effective value acquisition unit 103, a leakage presence / absence determination unit 104, a circuit breaker 108, and a leakage notification unit. 109, an operation state information receiving unit 110 is provided. Here, functions other than the predicted stable period setting unit 102 and the operation state information receiving unit 110 are the same as the functions described in the first embodiment.

  The operation state information receiving unit 110 receives operation state information indicating the operation state of the electric device 200 from the home control device 600 that communicates with the electric device 200. The operating state information receiving unit 110 includes, for example, a home telecommunications network interface 20.

  Here, the predicted stable period setting unit 102 sets the predicted stable period based on the operating state information received by the operating state information receiving unit 110.

  The leakage detection process executed by the leakage detection device 150 is basically the same as the step S102 shown in FIG. 7 except that the predicted stable period setting process shown in FIG. 11 is executed instead of the predicted stable period setting process shown in FIG. In particular, the leakage detection process performed by the leakage detection device 100 is the same. Hereinafter, the predicted stable period setting process executed by the leakage detection device 150 will be described with reference to FIG.

  First, the CPU 11 transmits the operation state request information to the home control device 600 (step S301). Specifically, the CPU 11 transmits the operation state request information to the home control device 600 via the home telecommunication network interface 20. Here, in-home control device 600 transmits the operating state information acquired from electrical device 200 or the like to leakage detecting device 150 in response to receiving the operating state request information.

  CPU11 will discriminate | determine whether the operation state information was received from the in-home control apparatus 600, if the process of step S301 is completed (step S302). For example, the CPU 11 can monitor the control signal supplied from the home telecommunications network interface 20 and determine whether or not the operation state information is received by the home telecommunications network interface 20.

  If it is determined that the operating state information has not been received from the home control device 600 (step S302: NO), the CPU 11 returns the process to step S302. That is, the CPU 11 repeats the determination process in step S302 until it is determined that the operating state information has been received from the home control device 600.

  On the other hand, when determining that the operating state information has been received from the home control device 600 (step S302: YES), the CPU 11 sets a predicted stable period based on the operating state information (step S303). The operation state information can include, for example, information indicating a schedule of operation modes of the electric device 200 in the present, the past, and the future. The method of setting the predicted stable period based on the operating state information can be adjusted as appropriate.

  For example, the CPU 11 can set a period that does not include the switching time of the operation mode of the electric device 200 as the scheduled stabilization period. Or CPU11 can set the period when the electric equipment 200 has stopped to a scheduled stabilization period. As described above, the CPU 11 can set a period during which power consumption by the electric device 200 is as stable as possible as the scheduled stabilization period. When completing the process of step S303, the CPU 11 completes the predicted stable period setting process.

  In step S107, the CPU 11 can notify that there is a leakage through the home control device 600. For example, the CPU 11 transmits an alarm instruction signal to the home control device 600 via the home telecommunication network interface 20. Here, home control device 600 transmits the received alarm instruction signal to alarm device 500. The alarm device 500 notifies the user that there is a leakage according to the received alarm instruction signal. In-home control device 600 may notify the user that there is a leakage.

  Moreover, CPU11 can interrupt | block an electric circuit via the household control apparatus 600 in step S108. For example, the CPU 11 transmits a cutoff instruction signal to the home control device 600 via the home telecommunication network interface 20. Here, home controller 600 transmits the received block instruction signal to branch breaker 320. The branch breaker 320 cuts off the electric circuit according to the received cut-off instruction signal.

  According to the present embodiment, based on the operation state information indicating the operation state of the electric device 200, a predicted stable period suitable for detecting a leakage is set, and the detection of the leakage is performed during the predicted stable period. For this reason, according to this embodiment, the improvement of the accuracy of detection of an electrical leakage can be further expected.

(Modification)
As mentioned above, although embodiment of this invention was described, when implementing this invention, a deformation | transformation and application with a various form are possible.

  In the present invention, which part of the configuration, function, and operation described in the first embodiment and the second embodiment is adopted is arbitrary. Further, in the present invention, in addition to the configuration, function, and operation described above, further configuration, function, and operation may be employed.

  For example, the leakage detection device 100 may not include the electric circuit interrupting unit 108. In this case, when the leakage detection device 100 detects a leakage, it can notify the leakage without interrupting the electric circuit. For example, the leakage detection device 100 may not include the leakage notification unit 109. In this case, when the leak detection device 100 detects a leak, the leak circuit can be cut off without notifying the leak.

  In the first embodiment, the example in which the leakage detection device 100 constantly measures power has been described. In the present invention, leakage detection device 100 may appropriately measure power according to a predetermined schedule, a user instruction, or the like. In this case, the leakage detection apparatus 100 can set the check target period to an actual stable period or an unreal stable period while measuring power.

  In the first embodiment, the example in which the leakage detection device 100 constantly measures current has been described. In the present invention, the leakage detection device 100 may measure the current only within the predicted stable period. Even in this case, the leakage detection device 100 can detect a leakage occurring within the predicted stable period after the predicted stable period ends.

  In the first embodiment, a single system (for example, a system in which power is supplied by the L1 phase and the N phase, or a system in which power is supplied by the L2 phase and the N phase) that is a target for detecting leakage. The example in which the number of connected electric devices 200 is one has been described. In the present invention, there may be two or more electrical devices 200 connected to one system that is a target for detecting leakage. In this case, the total current flowing through the two or more electric devices 200 flows through the electric circuit. However, even in this case, since the actual stable period is set based on the record of the power supplied by the electric circuit, the same effect as that of the first embodiment can be expected.

  On the other hand, when the scheduled safety period is set based on the operation state information as in the second embodiment, the two or more electric devices are based on the operation state information related to each of the two or more electric devices 200. It is desirable that a period during which all 200 can be expected to consume power stably is set as the predicted stable period. Even when there are two or more electric devices 200, it is possible to detect a leakage due to a tracking phenomenon only by measuring the electric circuit of the main breaker 310.

  Moreover, when the leakage detection device 150 can communicate with the home control device 600 as in the second embodiment, an appropriate period can be provided as the predicted stable period. For example, if there is no period during which the electric power consumed by the electric device 200 is stable, the leakage detection device 150 controls the electric appliance 200 by the home control device 600 so that a period during which the electric power consumed by the electric device 200 is stable is ensured. Can be made. In this case, for example, leakage detection device 150 transmits information indicating the period to be set as the predicted stable period to in-home control device 600. On the other hand, the home control device 600 controls the electric device 200 so that the power consumed by the electric device 200 is stabilized during the period indicated by the received information.

  Alternatively, for example, the leakage detection device 150 transmits to the home control device 600, ensuring instruction information for a period during which the power consumed by the electric device 200 is stable. On the other hand, in response to receiving the securing instruction information, in-home control device 600 secures a period during which the power consumed by electrical device 200 is stable in consideration of operating efficiency and the like. Then, the home control device 600 controls the electric device 200 so that the power consumed by the electric device 200 is stabilized within the secured period. Here, the home control device 600 transmits information indicating the secured period to the leakage detection device 150. And the leak detection apparatus 150 sets the period shown by the received information to a prediction stable period. Note that the home control device 600 can ensure such a period by stopping the electric device 200 or prohibiting the switching of the operation mode by the electric device 200. When two or more electrical devices 200 exist, the home control device 600 controls one or more electrical devices 200 out of the two or more electrical devices 200 in order to ensure such a period. be able to.

  In the first embodiment, when it is determined that the number of one cycle period in which the execution value of the current is abnormal is a predetermined number, the detection of the leakage is performed from the state where the leakage detection is not performed and the electric circuit is not interrupted. An example in which a notification is made and the electric circuit is cut off has been described. In the present invention, notification of detection of leakage or interruption of the electric circuit may be executed step by step.

  For example, a first threshold value and a second threshold value larger than the first threshold value can be set as threshold values for determining whether or not the current execution value is abnormal. Here, when it is determined that the number of one cycle period in which the difference between the effective value of the current and the average value of the effective values exceeds the first threshold value is a predetermined number, the detection of leakage is notified as the first step. May be. Then, when it is determined that the number of one cycle period in which the difference between the effective value of the current and the average value of the effective values exceeds the second threshold value is a predetermined number, as a second step, a notification of leakage detection is made. In addition, the electric circuit may be interrupted.

  Alternatively, depending on whether the number of one-cycle period in which the current execution value is abnormal exceeds a first threshold value and whether a second threshold value larger than the first threshold value is exceeded, notification of detection of an electrical leakage, The interruption of the electric circuit may be executed in stages.

  By applying the operation program that defines the operation of the leakage detection devices 100 and 150 according to the present invention to an existing personal computer and information terminal device, the personal computer and the like are caused to function as the leakage detection devices 100 and 150 according to the present invention. It is also possible.

  Further, the distribution method of such a program is arbitrary. For example, the program can be read by a computer such as a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), an MO (Magneto Optical Disk), or a memory card. It may be distributed by storing in a recording medium, or distributed via a communication network such as the Internet.

  Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope of the present invention. Further, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

  The present invention can be applied to a system including an electric device that operates with AC power.

11 CPU, 12 ROM, 13 RAM, 14 Flash memory, 15 RTC, 16 Touch screen, 17 Wattmeter, 18 Wattmeter interface, 19 External device interface, 20 Home telecommunication network interface, 100, 150 Earth leakage detection device, 101 Current Measurement unit, 102 Predictive stability period setting unit, 103 RMS value acquisition unit, 104 Leakage presence / absence determination unit, 105 Voltage measurement unit, 106 Actual stability period detection unit, 107 Unstable notification unit, 108 Electric circuit interruption unit, 109 Leakage notification unit, 110 operation state information receiving unit, 171 and 172 current detection unit, 173, 174, 175 potential detection unit, 200 electrical equipment, 210 plug, 220 communication adapter, 300 distribution board, 310 main breaker, 320 branch breaker, 330 outlet, 40 , 402, 403 wire, 500 the warning device, 600 home controller, 1000,1100 leakage detection system

Claims (14)

Current measuring means for measuring a current flowing through an electric circuit for supplying an alternating current to an electric device;
Based on the current measured by the current measuring means, a predicted stable period in which the fluctuation value of the power consumed by the electrical device is predicted to be equal to or less than a predetermined threshold is divided for each cycle of the alternating current. Based on the number of effective values whose difference from the average value of the effective values for each cycle period is equal to or greater than a predetermined threshold among the effective values of the current flowing through the electric circuit for each cycle period obtained by Bei example a leakage presence determination result output means for outputting a determination result of the presence or absence of electric leakage by the tracking phenomenon, the,
The predicted stable period includes a period during which the electrical device is predicted to be in an operating state that consumes more power than a standby state and a stopped state.
Earth leakage detection device. Voltage measuring means for measuring a voltage applied to the electrical device;
Based on the current measured by the current measuring means and the voltage measured by the voltage measuring means, a real stable period in which the fluctuation value of the power consumed by the electrical device is equal to or less than a predetermined threshold is detected. Real stable period detection means;
Predicted stable period setting means for setting a period corresponding to the actual stable period detected by the actual stable period detection means as the predicted stable period;
The leakage detection device according to claim 1. The predicted stable period setting means sets the period of the same time zone as the actual stable period that arrives after the actual stable period detected by the actual stable period detecting means as the predicted stable period.
The electric leakage detection device according to claim 2. The predicted stable period setting means sets the actual stable period detected by the actual stable period detecting means as the predicted stable period;
The electric leakage detection device according to claim 2. Current measuring means for measuring a current flowing through an electric circuit for supplying an alternating current to an electric device;
A predicted stable period setting means for setting a predicted stable period in which power consumed by the electrical device is predicted to be stable;
Based on the current measured by the current measuring unit, the current flowing through the electric circuit for each period obtained by dividing the predicted stable period set by the predicted stable period setting unit for each cycle of the alternating current An effective value acquisition means for calculating an effective value of
Among the effective values obtained for each cycle period by the effective value acquisition means, the number of effective values whose difference from the average value of the effective values obtained for each cycle period is equal to or greater than a predetermined threshold. On the basis of the leakage presence / absence determination means for determining the presence / absence of leakage due to the tracking phenomenon,
Voltage measuring means for measuring a voltage applied to the electrical device;
Based on the current measured by the current measuring means and the voltage measured by the voltage measuring means, a real stable period in which the fluctuation value of the power consumed by the electrical device is equal to or less than a predetermined threshold is detected. An actual stable period detection means,
The predicted stable period setting means sets the actual stable period detected by the actual stable period detecting means as the predicted stable period,
When the actual stable period is not detected for a predetermined time or more by the actual stable period detection means, the apparatus further comprises an unstable notification means for notifying the user that the actual stable period is not detected.
Earth leakage detection device. Current measuring means for measuring a current flowing through an electric circuit for supplying an alternating current to an electric device;
A predicted stable period setting means for setting a predicted stable period in which power consumed by the electrical device is predicted to be stable;
Based on the current measured by the current measuring unit, the current flowing through the electric circuit for each period obtained by dividing the predicted stable period set by the predicted stable period setting unit for each cycle of the alternating current An effective value acquisition means for calculating an effective value of
Among the effective values obtained for each cycle period by the effective value acquisition means, the number of effective values whose difference from the average value of the effective values obtained for each cycle period is equal to or greater than a predetermined threshold. On the basis of the leakage presence / absence determination means for determining the presence / absence of leakage due to the tracking phenomenon,
An operation state information receiving means for receiving operation state information indicating an operation state of the electric device from a communication device that communicates with the electric device;
The predicted stable period setting means sets the predicted stable period based on the operating state information received by the operating state information receiving means.
Earth leakage detection device. When the determination result that there is a leakage due to a tracking phenomenon is output by the leakage presence / absence determination result output unit, the circuit breaker further includes an electric circuit interruption unit that interrupts the electric circuit to a breaker incorporated in the electric circuit
The leakage detection device according to any one of claims 1 to 4. When the determination result indicating that there is a leakage due to the tracking phenomenon is output by the leakage presence / absence determination result output means, the leakage detection means further notifies the user that there is a leakage due to the tracking phenomenon.
The leakage detection device according to any one of claims 1 to 4 or 7. A current measuring step for measuring a current flowing through an electric circuit for supplying an alternating current to the electric device;
Based on the current measured in the current measurement step, a predicted stable period in which the fluctuation value of the power consumed by the electrical device is predicted to be equal to or less than a predetermined threshold is divided for each cycle of the alternating current. Based on the number of effective values whose difference from the average value of the effective values for each cycle period is equal to or greater than a predetermined threshold among the effective values of the current flowing through the electric circuit for each cycle period obtained by A leakage presence / absence determination result output step for outputting a determination result of whether or not there is a leakage due to a tracking phenomenon ,
The predicted stable period includes a period during which the electrical device is predicted to be in an operating state that consumes more power than a standby state and a stopped state.
Electric leakage detection method. A current measuring step for measuring a current flowing through an electric circuit for supplying an alternating current to the electric device;
A predicted stable period setting step for setting a predicted stable period in which power consumed by the electrical device is predicted to be stable; and
Based on the current measured in the current measuring step, the current flowing through the electric circuit for each period obtained by dividing the predicted stable period set in the predicted stable period setting step for each period of the alternating current An effective value obtaining step for obtaining an effective value of
Among the effective values obtained for each cycle period in the effective value acquisition step, the number of effective values whose difference from the average value of the effective values obtained for each cycle period is equal to or greater than a predetermined threshold. On the basis of the leakage presence / absence determination step for determining the presence / absence of leakage due to the tracking phenomenon,
A voltage measuring step for measuring a voltage applied to the electrical device;
Based on the current measured in the current measurement step and the voltage measured in the voltage measurement step, a real stable period in which the fluctuation value of the power consumed by the electrical device is equal to or less than a predetermined threshold is detected. An actual stable period detection step,
In the predicted stable period setting step, the actual stable period detected in the actual stable period detecting step is set as the predicted stable period,
A non-stable notification step of notifying the user that the actual stable period is not detected when the actual stable period is not detected for a predetermined time or more in the actual stable period detecting step;
Electric leakage detection method. A current measuring step for measuring a current flowing through an electric circuit for supplying an alternating current to the electric device;
A predicted stable period setting step for setting a predicted stable period in which power consumed by the electrical device is predicted to be stable; and
Based on the current measured in the current measuring step, the current flowing through the electric circuit for each period obtained by dividing the predicted stable period set in the predicted stable period setting step for each period of the alternating current An effective value obtaining step for obtaining an effective value of
Among the effective values obtained for each cycle period in the effective value acquisition step, the number of effective values whose difference from the average value of the effective values obtained for each cycle period is equal to or greater than a predetermined threshold. On the basis of the leakage presence / absence determination step for determining the presence / absence of leakage due to the tracking phenomenon,
An operation state information receiving step for receiving operation state information indicating an operation state of the electric device from a communication device that communicates with the electric device; and
In the predicted stable period setting step, the predicted stable period is set based on the operating state information received in the operating state information receiving step.
Electric leakage detection method. A computer comprising current measuring means for measuring a current flowing through an electric circuit for supplying an alternating current to an electric device;
Based on the current measured by the current measuring means, a predicted stable period in which the fluctuation value of the power consumed by the electrical device is predicted to be equal to or less than a predetermined threshold is divided for each cycle of the alternating current. Based on the number of effective values whose difference from the average value of the effective values for each cycle period is equal to or greater than a predetermined threshold among the effective values of the current flowing through the electric circuit for each cycle period obtained by A program that functions as a leakage presence / absence determination result output means for outputting a determination result of whether or not leakage has occurred due to a tracking phenomenon,
The predicted stable period includes a period during which the electrical device is predicted to be in an operating state that consumes more power than a standby state and a stopped state.
program. A computer comprising: current measuring means for measuring a current flowing through an electric circuit for supplying an alternating current to an electric device; and voltage measuring means for measuring a voltage applied to the electric device.
A predicted stable period setting means for setting a predicted stable period in which power consumed by the electrical device is predicted to be stable;
Based on the current measured by the current measuring unit, the current flowing through the electric circuit for each period obtained by dividing the predicted stable period set by the predicted stable period setting unit for each cycle of the alternating current Means for obtaining the effective value of
Among the effective values obtained for each cycle period by the effective value acquisition means, the number of effective values whose difference from the average value of the effective values obtained for each cycle period is equal to or greater than a predetermined threshold. On the basis of the leakage presence / absence determination means for determining the presence / absence of leakage due to the tracking phenomenon,
Based on the current measured by the current measuring means and the voltage measured by the voltage measuring means, a real stable period in which the fluctuation value of the power consumed by the electrical device is equal to or less than a predetermined threshold is detected. A program that functions as an actual stable period detection means,
The predicted stable period setting means sets the actual stable period detected by the actual stable period detecting means as the predicted stable period,
The program further includes the computer,
When the actual stable period is not detected for a predetermined time or more by the actual stable period detecting means, the function is provided as an unstable notification means for notifying the user that the actual stable period is not detected.
program. A computer comprising current measuring means for measuring a current flowing through an electric circuit for supplying an alternating current to an electric device;
A predicted stable period setting means for setting a predicted stable period in which power consumed by the electrical device is predicted to be stable;
Based on the current measured by the current measuring unit, the current flowing through the electric circuit for each period obtained by dividing the predicted stable period set by the predicted stable period setting unit for each cycle of the alternating current Means for obtaining the effective value of
Among the effective values obtained for each cycle period by the effective value acquisition means, the number of effective values whose difference from the average value of the effective values obtained for each cycle period is equal to or greater than a predetermined threshold. On the basis of the leakage presence / absence determination means for determining the presence / absence of leakage due to the tracking phenomenon,
A program that functions as an operation state information receiving unit that receives operation state information indicating an operation state of the electric device from a communication device that communicates with the electric device,
The predicted stable period setting means sets the predicted stable period based on the operating state information received by the operating state information receiving means.
program.

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