JPWO2014184957A1 - Information output system, home energy management system, information output method, and program - Google Patents

Abstract

The discrimination system is a system that discriminates the operating state of an electrical device connected to a power supply system that can receive power from a plurality of power sources. The discrimination system includes a measurement device (110) and an information collection device (120). The measurement device (110) acquires information on the power supplied to the power supply system for each of the plurality of power sources, and supplies power that satisfies a preset criterion based on the acquired power information Is determined. Then, the measuring device (110) acquires the waveform of the current flowing from the determined power source to the power supply system as a current waveform to be transmitted to the information collecting device (120). The measurement device (110) transmits waveform information generated based on the acquired current waveform to the information collection device (120). The information collection device (120) acquires the waveform information transmitted by the measurement device (110), and determines the operating state of the electrical device (400) connected to the power supply system based on the acquired waveform information.

Description

  The present invention relates to a discrimination system, a home energy management system, a discrimination method, and a program.

  With the increasing demand for energy management, there is a need for a device that can easily determine the operating state of a plurality of electrical devices in a house. Patent Document 1 discloses an apparatus that detects a working device in a house by extracting a harmonic from a waveform of a current flowing through a feeder line and comparing the extracted harmonic with a preset harmonic. Yes.

JP 2011-014156 A

  An increasing number of homes have power supply units installed in homes. Here, the power feeding device refers to a power generation device such as a solar power generation panel or a power storage device such as an electric vehicle or a storage battery. When trying to determine the operating state of an electrical device from the current waveform in such a house, not only the current from the commercial distribution network (hereinafter referred to as “system power supply”) owned by the power company, but also from the power supply device It is also necessary to measure the current. Generally, the current measurement unit and the current waveform calculation unit are different modules, but as the number of current measurement points increases, the number of current waveforms transmitted from the measurement unit to the calculation unit increases. There arises a problem that the amount increases (hereinafter referred to as “the communication cost increases”). In addition, as the number of current measurement points increases, the number of computations for feature search increases in proportion to the number of current waveforms, so that a large computing capacity is required for the computation unit (hereinafter referred to as “the computation cost increases”). .) Also occurs.

  The present invention has been made in view of such problems, and it is possible to calculate the communication cost and the calculation even when determining the operating state of an electric device connected to a power supply system that can receive power from a plurality of power sources. It is an object to provide a discrimination system, a home energy management system, a discrimination method, and a program with a low cost.

  The discrimination system according to the present invention is a system that discriminates the operating state of an electrical device connected to a power supply system capable of receiving power from a plurality of power sources through cooperation between a measurement device and an information collection device. The measurement device acquires information on the power supplied to the power supply system for each of the plurality of power sources, and determines a power source that supplies power that satisfies a preset criterion based on the acquired power information. . Then, the measurement device acquires the waveform of the current flowing from the determined power source to the power supply system as a current waveform to be transmitted to the information collection device. The measuring device transmits waveform information generated based on the acquired current waveform to the information collecting device. The information collection device acquires the waveform information transmitted by the measurement device, and determines the operating state of the electrical equipment connected to the power supply system based on the acquired waveform information.

  ADVANTAGE OF THE INVENTION According to this invention, even when it is a case where the operating state of the electric equipment connected to the power supply system which can receive electric power from a several electric power source is discriminate | determined, communication cost and calculation cost can be made small.

It is a figure which shows the house in which the home energy management system which concerns on embodiment of this invention was installed. It is a figure for demonstrating the home energy management system which concerns on embodiment of this invention. It is a block diagram of the measuring device with which a home energy management system is provided. It is an electric current waveform observed with a feeder line when a cleaner is operated. It is a current waveform observed in the feeder line when the microwave oven is operated. It is a functional block diagram for demonstrating the function of the process part shown in FIG. It is a block diagram of the information collection device with which a home energy management system is provided. It is a functional block diagram for demonstrating the function of the determination part shown in FIG. It is a flowchart for demonstrating a waveform information transmission process. 3 is a flowchart for explaining waveform processing according to the first embodiment. It is a flowchart for demonstrating an operation state discrimination | determination process. It is a flowchart for demonstrating a determination process. 10 is a flowchart for explaining waveform processing according to the second embodiment.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Embodiment 1)
The discrimination system according to the embodiment of the present invention uses an operation state (for example, whether an electric device is operating or stopped) of an electric device connected to a power supply system capable of receiving power from a plurality of power sources as a power supply system. This is a system for making a determination based on the waveform of a flowing current. Here, the power supply system is a distribution system that distributes the received power. Say. In the present embodiment, a home energy management system 100 that determines an operating state of an electric device 400 connected to a power supply system 200 will be described as an example of a determination system.

  Prior to describing the home energy management system 100, the power supply system 200 and various devices connected to the power supply system 200 will be described.

  The power supply system 200 is a home power distribution system such as a single-phase three-wire power supply. The power supply system 200 is connected to an electric device 400 such as an air conditioner, a television, or a dishwasher. The electric device 400 is a network-compatible home appliance (for example, a home appliance conforming to Echonet Lite (registered trademark)), and is all connected to a home network via a communication terminal.

  The power supply system 200 includes a distribution board 210 as shown in FIG. The distribution board 210 is a device that distributes electric power supplied from a system power supply or a power supply device to electric devices. As shown in FIG. 2, the distribution board 210 includes a main circuit breaker 211 connected to a system power supply, and branch breakers 212 to 216 including overcurrent circuit breakers and the like. An electric vehicle 310 is connected to the branch breaker 212 via a power conditioner 340, and a solar panel 320 is connected to the branch breaker 213 via a power conditioner 350. In addition, a storage battery 330 is connected to the branch breaker 214, and an electric device 400 is connected to each of the branch breakers 215 and 216. The storage battery 330 includes a power conditioner inside, and can be directly connected to the main system.

  The power conditioner (the power conditioners inside the power conditioners 340 and 350 and the storage battery 330) converts the electricity generated by the power generation device or stored in the power storage device into a state where it can be supplied to the power supply system 200. It is a device for. Specifically, the power conditioner converts a direct current supplied from the power storage device or the power generation device into an alternating current and supplies the alternating current to the main system. Generally, the power conditioner has a “constant voltage mode” for supplying a constant voltage to the main system and a “constant current mode” for supplying a constant current to the main system. The current waveform observed in the constant voltage mode is affected by the operation of the electrical equipment in the house, but the current waveform observed in the constant current mode is the waveform affected by the operation of the electrical equipment in the house. It will not be. In the following description, it is assumed that the power conditioner is operating in the “constant voltage mode” in order to be able to determine the operation state of the electric device from the current waveform.

  Current sensors 111 a to 111 d are installed inside the distribution board 210. The current sensor 111 a is installed on a power line between the system power supply and the main breaker 211. The current sensor 111b is installed on a power line between the power conditioner 340 and the branch breaker 212. The current sensor 111c is installed on the power line between the power conditioner 350 and the branch breaker 213. In addition, the current sensor 111 d is installed on the power line between the storage battery 330 and the branch breaker 214. Further, the current sensor 111d is installed on a power line between the power conditioner 350 and the branch breaker 214.

  The current sensors 111a to 111d are sensors for measuring a superimposed waveform of current waveforms of electric devices operating in a house. The current sensors 111a to 111d are constituted by, for example, clamp-type ammeters. If the power supply system 200 is a single-phase three-wire power supply, the current sensors 111a to 111d are installed in, for example, the L1 phase and the L2 phase.

  Based on the above, the home energy management system 100 will be described below.

  As shown in FIG. 2, the home energy management system 100 acquires the measurement device 110 that measures the waveform of the current flowing through the power supply system 200 and the current waveform measured by the measurement device 110 via a wired or wireless connection. The information collection device 120 determines the operation state of the electric device 400 based on the current waveform, and the display terminal 130 displays the operation state determined by the information collection device 120.

  The measuring device 110 is a device for transmitting a waveform of a current flowing through the power supply system 200 to the information collecting device 120. As illustrated in FIG. 3, the measurement device 110 includes a current measurement unit 111 that measures a current flowing through the power supply system 200, a power measurement unit 112 that measures power supplied to the power supply system 200, a current measurement unit 111, and power. The processing unit 113 generates waveform information to be transmitted to the information collection device 120 based on the measurement result of the measurement unit 112, and the waveform transmission unit 114 transmits waveform information generated by the processing unit 113 to the information collection device 120. Is done.

  The current measuring unit 111 includes a high-pass filter, an AD converter (Analogue-digital converters), and the like. The current measurement unit 111 is connected to the current sensors 111a to 111d, and performs filtering processing and sampling processing on the plurality of current signals received from the current sensors 111a to 111d, respectively. The filtering process is a process of removing 50 Hz and 60 Hz bands, which are power supply frequencies, from the current signal, and the sampling process is a process of sampling the current signal at a sampling period of about 20 kHz in which the feature of the home appliance is captured. The current measurement unit 111 generates a current waveform in the 1 kHz to 20 kHz band from the current signal by executing both the filtering process and the sampling process.

  4 and 5 are examples of current waveforms measured by the current measuring unit 111. FIG. FIG. 4 is a current waveform synchronized with one cycle of the voltage waveform when the cleaner is operated, and FIG. 5 is a current waveform synchronized with one cycle of the voltage waveform when the microwave oven is operated. As can be seen from both figures, the current waveform varies depending on the home appliance. Therefore, it is possible to estimate which electrical device is in operation by paying attention to characteristics such as the amplitude, phase, and frequency spectrum of the harmonic component of the current waveform.

  Returning to FIG. 3, the power measuring unit 112 includes an AD converter, a processor, and the like. Each breaker (the main breaker 211 and the branch breakers 212 to 216) has a built-in voltage sensor, and each breaker can transmit a voltage signal to the power measuring unit 112. The power measurement unit 112 calculates the power value of the current sensor installation location (hereinafter referred to as “measurement location”) based on the voltage signal acquired from each breaker and the current signal acquired from the current sensors 111a to 111d, respectively. The data is transmitted to the processing unit 113. Note that the current sensor in the power measurement unit 112 may be the same as the current sensor in the current measurement unit 111. By making it the same, the sensor cost can be reduced.

  The processing unit 113 includes a processing device such as a processor. The processing unit 113 operates in accordance with a program stored in a ROM (Read Only Memory) or a RAM (Random Access Memory) (not shown), thereby executing various operations including a “waveform information transmission process” described later. The processing unit 113 functions as a power information acquisition unit 113a, a current waveform acquisition unit 113b, a waveform processing unit 113c, and a waveform information transmission unit 113d as illustrated in FIG. 6 by executing the “waveform information transmission process”. These functions will be described later in the description of “waveform information transmission processing”.

  Returning to FIG. 3, the waveform transmission unit 114 includes a communication interface such as a LAN (Local Area Network) cable connection device or a wireless LAN slave unit. The waveform transmission unit 114 transmits the waveform information generated by the processing unit 113 to the information collection device 120 via wired or wireless.

  Returning to FIG. 2, the information collection device 120 is a device for determining the operation state of the electric device 400 based on the current waveform measured by the measurement device 110. As shown in FIG. 7, the information collection device 120 receives from the measurement device 110 a communication unit 121 that receives waveform information from the measurement device 110, a storage unit 122 that stores registration data of each electrical device in the house, and the measurement device 110. A determination unit 123 that determines the operating state of the electrical device 400 based on the waveform information that has been performed and the registration data that is stored in the storage unit 122, and a control unit that controls the electrical device 400 based on the determination result of the determination unit 123; Consists of

  The communication unit 121 includes a communication interface such as a LAN cable connection device or a wireless LAN base unit. The communication unit 121 receives waveform information from the measurement device 110 via wired or wireless. The communication unit 121 is connected to the Internet or a home network, and can communicate with the electric device 400 or an external device (not shown) (for example, an external server).

  The storage unit 122 includes a storage device such as a dynamic random access memory (DRAM), a static random access memory (SRAM), a flash memory, and a hard disk. Various types of information such as waveform information received by the communication unit 121, operation information received from the display terminal 130, and results calculated by the determination unit 123 (for example, estimation results of operating devices) are recorded in the storage unit 122. In the storage unit 122, registration data of each electric device used in the determination process described later is recorded in advance. The registered data is, for example, feature amount data obtained by extracting features of a current waveform that appears on the power supply line when the electric device 400 is operated.

  The determination unit 123 includes a processing device such as a processor. The determination unit 123 performs various operations including an “operation state determination process” described later by operating according to a program stored in a ROM or RAM (not shown). The determination unit 123 functions as a waveform information acquisition unit 123a and an operation state determination unit 123b as illustrated in FIG. 8 by executing the “operation state determination process”. Note that these functions will be described later in the description of “operation state determination processing”.

  Returning to FIG. 7, the control unit 124 includes a processing device such as a processor and a communication device such as a USB (Universal Serial Bus) cable connection device. The control unit 124 transmits the determination result of the determination unit 123 to the display terminal 130. In addition, the control unit 124 transmits a control command to the electrical device 400 connected to the home network based on the determination result of the determination unit 123.

  Returning to FIG. 2, the display terminal 130 includes a display device such as a liquid crystal display. On the display terminal 130, information on the current and past power consumption of the house is displayed, as well as information on the current operating state of the electric device 400, information on past usage history of the electric device 400, and the like. The display terminal 130 may be freely portable like a tablet PC.

  Next, operation | movement of the home energy management system 100 which has such a structure is demonstrated.

  The operation of the home energy management system 100 is divided into a “waveform information transmission process” executed by the measurement apparatus 110 and an “operation state determination process” executed by the information collection apparatus 120. First, “waveform information transmission processing” will be described.

  When the measurement device 110 is powered on, the processing unit 113 of the measurement device 110 executes waveform information transmission processing at regular time intervals (for example, every second). The waveform information transmission process is a process for generating waveform information from the current waveform acquired by the current measurement unit 111 and transmitting the generated waveform information to the information collection device 120. The “waveform information transmission process” will be described below with reference to the flowchart of FIG. In the following description, in order to facilitate understanding, the locations where the current sensors 111a to 111d are installed are expressed as measurement locations 1 to 4, respectively.

  The power information acquisition unit 113a of the processing unit 113 acquires the power value of each measurement location from the power measurement unit 112 (step S110). If there are four measurement locations, the power information acquisition unit 113a acquires four power values.

  The power information acquisition unit 113a adds the plurality of power values acquired in step S110 to calculate the total power consumed in the house (hereinafter referred to as “total power consumption value”) (step S120). .

  The waveform information transmission unit 113d of the processing unit 113 determines whether or not the electric device 400 is operating in the house based on the total power consumption value calculated in step S120. More specifically, it is determined whether or not the total power consumption value exceeds a preset threshold value (step S130). The threshold is not simply set to “0”, but is set to a value obtained by adding a margin due to noise in consideration of noise on the power line. If the power value is less than or equal to the threshold value (step S130: No), the processing unit 113 ends the waveform information transmission process because there is no electrical device 400 operating in the house. When the power value exceeds the threshold (step S130: Yes), the process proceeds to step S140.

  The processing unit 113 executes waveform processing for synthesizing a plurality of current waveforms into one current waveform (step S140). Hereinafter, waveform processing will be described with reference to the flowchart of FIG.

  The current waveform acquisition unit 113b of the processing unit 113 prepares a variable j in a RAM (not shown) and sets “1” to the prepared variable j (step S141).

  The current waveform acquisition unit 113b determines whether the power value at the measurement location j exceeds a preset threshold value (step S142). The threshold is not simply set to “0”, but is set to a value obtained by adding a margin due to noise in consideration of noise on the power line. In addition, when the measurement location j is a power line connected to the power storage device, it is also considered whether it is a power value measured during charging or a power value measured during power supply. In the case of the power value measured at the time of charging, the current waveform acquisition unit 113b sets the measured power value as a negative value so that the power value does not exceed the threshold value. If the power value is less than or equal to the threshold (step S142: No), no power is supplied from the measurement location j, and the current waveform acquisition unit 113b proceeds to step S144 without acquiring the current waveform at the measurement location j. . When the power value exceeds the threshold value (step S142: Yes), the process proceeds to step S143.

  The current waveform acquisition unit 113b acquires the current waveform at the measurement location j from the current measurement unit 111, and stores it in a RAM (not shown) as a current waveform to be transmitted to the information collection device 120 (step S143).

  The current waveform acquisition unit 113b determines whether the processing has been completed for all measurement points. Specifically, the current waveform acquisition unit 113b determines whether j is a value that matches the number of installed current sensors (step S144). When j is a value smaller than the number of installation (step S145: No), the current waveform acquisition unit 113b adds 1 to j (step S145) and returns to step S142. If j is a value that matches the installed number (step S145: Yes), the process proceeds to step S146.

  The waveform processing unit 113c of the processing unit 113 adds all the current waveforms acquired in step S143 to generate one current waveform. Specifically, the waveform processing unit 113c generates one current waveform by adding current values for each phase for all the current waveforms acquired in step S143 (step S146). The added current waveform is a current waveform obtained by integrating the dispersed current waveforms, and includes feature quantities of a plurality of electric devices operating in the house. If only one current waveform is acquired in step S143, the waveform processing unit 113c returns to the waveform information transmission process flow without executing step S146.

  Returning to the waveform information transmission processing flow of FIG. 9, the waveform information transmission unit 113d transmits one current waveform generated by the waveform processing to the information collection device 120 as waveform information (step S150). When the transmission is completed, the processing unit 113 ends the waveform information transmission process.

  Next, the “operation state determination process” will be described.

  The determination unit 123 of the information collection device 120 acquires waveform information from the measurement device 110 when the information collection device 120 is powered on, and an operation state that determines the operation state of the electrical device 400 based on the acquired waveform information Perform discrimination processing. Hereinafter, the operation state determination process will be described with reference to the flowchart of FIG.

  The waveform information acquisition unit 123a of the determination unit 123 determines whether the communication unit 121 has received waveform information from the measurement device 110 (step S210). When the waveform information has not been received (step S210: No), the waveform information acquisition unit 123a repeats step S210 until the waveform information is received from the measurement device 110. When the waveform information is received (step S210: Yes), the waveform information acquisition unit 123a acquires the waveform information from the communication unit 121 and proceeds to step S220.

  The determination unit 123 executes a determination process for determining the operating state of the electric device 400 based on the waveform information received from the measurement device 110 (step S220). Hereinafter, the determination process will be described with reference to the flowchart of FIG.

  The operation state determination unit 123b of the determination unit 123 extracts the feature amount of the current waveform included in the waveform information received from the measurement device 110 (step S221). The feature amount extraction method is not limited to a specific method, and various known methods can be used. As a feature quantity extraction method, for example, there is a method of extracting features of frequency components of a current waveform such as fast Fourier transform and wavelet transform.

  The operating state determination unit 123b prepares a variable j in a RAM (not shown) and sets “1” to the prepared variable j (step S222).

  The operation state determination unit 123b acquires registration data j from the storage unit 122 (step S223). The registered data is feature amount data obtained by extracting features of a current waveform that appears on the power supply line when the electric device 400 is operated, and is stored in advance for the number of electric devices 400. In the following description, it is assumed that N pieces of registration data from registration data 1 to registration data N are stored in the storage unit 122.

  The operation state determination unit 123b calculates a matching rate MR between the feature amount data acquired in step S221 and the registration data j acquired in step S223 (step S224). The matching rate MR can be calculated using various methods. For example, the ratio of the registered data contained in the measured current waveform may be used as the matching rate MR. More specifically, as shown in the following formula (1), the matching rate MR is obtained by calculating the integral value in the range of 0 to 2π of the matching value S (i) and the range of 0 to 2π of the registered data L (i). It may be a value calculated by dividing by the integral value. At this time, as shown in the following formula (2), the matching value S (i) compares the feature quantity data T (i) and the amplitude component of the registered data L (i), and T (i) and L ( When the sign of i) matches, it may be T (i) with L (i) as the maximum value. In the formulas (1) and (2), i represents a phase.

  The operation state determination unit 123b determines whether the matching rate MR exceeds a preset threshold value (step S225). If the matching rate MR is equal to or lower than the threshold value (step S225: No), the corresponding electrical device 400 is not operating, and the operation state determination unit 123b proceeds to step S227 without executing step S226. When the matching rate MR exceeds the threshold (step S225: Yes), the operation state determination unit 123b determines that the corresponding electric device 400 is operating, and does not show identification information of the corresponding electric device 400 (not illustrated). Recording in the RAM (step S226).

  The operation state determination unit 123b determines whether comparison has been completed for all registered data. Specifically, the operation state determination unit 123b determines whether j is a value that matches the number N of registered data (step S227). When j is smaller than N (step S227: No), the operation state determination unit 123b adds 1 to j (step S228) and returns to step S223. When j is a value that matches N (step S227: Yes), the operation state determination unit 123b ends the determination process.

  Returning to the flow of FIG. 11, the operation state determination unit 123b transmits the determination result of the determination process to the control unit 124 (step S230). For example, the operation state determination unit 123b transmits the identification information of the electric device 400 recorded in the RAM in step S226 to the control unit 124 as information of the electric device 400 currently operating. When the transmission is completed, the determination unit 123 returns to step S210 and waits for the waveform information to be transmitted from the measurement device 110 again.

  According to the present embodiment, the measuring device 110 combines the current waveform into one current waveform and transmits it to the information collecting device 120, so the communication cost between the measuring device 110 and the information collecting device 120 is reduced. it can. In addition, since the waveform processed by the information collection device 120 is only one waveform transmitted from the measurement device 110, the calculation cost of the information collection device 120 can be reduced.

  Further, the measuring device 110 determines whether or not the electric device 400 is operating in the house based on the sum of the power values. If the measuring device 110 is not operating, the measuring device 110 transmits waveform information to the information collecting device 120. Therefore, the communication cost between the measuring device 110 and the information collecting device 120 can be further reduced. When the waveform information is not transmitted, the information collecting apparatus 120 does not execute the process, so that the calculation cost of the information collecting apparatus 120 can be further reduced.

(Embodiment 2)
In Embodiment 1, the home energy management system 100 discriminates the operating state of the electric device 400 based on one current waveform obtained by combining a plurality of current waveforms. However, the home energy management system 100 can also determine the operating state of the electric device 400 based on one current waveform selected from a plurality of current waveforms. Hereinafter, the home energy management system 100 that determines the operating state of the electric device 400 based on one current waveform selected from a plurality of current waveforms will be described. Since the configuration other than the “waveform processing” is the same as that of the first embodiment, the description thereof is omitted. Hereinafter, waveform processing according to the second embodiment will be described.

  When the power supplied to the power supply system 200 exceeds a preset threshold value (step S130: Yes shown in FIG. 9), the processing unit 113 stores information on one current waveform selected from a plurality of current waveforms. Waveform processing for converting the current waveform into a current waveform that can be processed by the collection device 120 (hereinafter referred to as “simulated waveform”) is executed (step S140). Hereinafter, waveform processing will be described with reference to the flowchart of FIG.

  The power information acquisition unit 113a of the processing unit 113 acquires the power value of each measurement location from the power measurement unit 112 (step S331).

  The current waveform acquisition unit 113b of the processing unit 113 acquires a current waveform that can best extract the characteristics of the device among the plurality of current waveforms acquired by the current measurement unit 111, that is, a current waveform having the highest SN ratio. Specifically, the current waveform acquisition unit 113b acquires a current waveform measured at a measurement location where the power value is the maximum among the plurality of current waveforms acquired by the current measurement unit 111 (step S332). For example, the current waveform acquisition unit 113b compares the plurality of power values acquired in step S331 to identify the measurement location with the maximum power value. In the example of FIG. 2, if 0 W is supplied from the system power source, 0 W from the electric vehicle 310, 3 kW from the solar panel 320, and 2 kW from the storage battery 330, the current waveform acquisition unit 113 b includes the current sensor 111 c. Is identified as the measurement location with the maximum power value. And the current waveform acquisition part 113b acquires the current waveform of the specified measurement location from the current measurement part 111 as a current waveform that can best extract the features of the device.

  Based on the total power consumption value acquired in step S110 and the power value of the measurement location specified in step S332 (hereinafter referred to as “maximum power value”), the waveform processing unit 113c of the processing unit 113 performs the total power consumption in the home. A ratio of the maximum power to the power is calculated (step S333). For example, if the maximum power value is 3 kW and the total power consumption is 5 kW, the waveform processing unit 113c calculates the ratio as 0.6 (3 kW / 5 kW = 0.6).

  The waveform processing unit 113c multiplies the current value of each phase of the current waveform acquired in step S332 by the reciprocal of the ratio calculated in step S333, and acquires the current waveform obtained by multiplication as a simulated waveform ( Step S334). For example, if the ratio is calculated as 0.6 in step S333, the waveform processing unit 113c multiplies the current value of each phase of the current waveform by 1.67 (1 / 0.6). Generate a simulated waveform.

  When the generation of the simulated waveform is completed, the processing unit 113 ends the waveform processing and returns to the waveform information transmission processing flow shown in FIG. The waveform information transmitting unit 113d transmits the simulated waveform generated by the waveform processing to the information collecting apparatus 120 as waveform information (step S150).

  According to the present embodiment, since the current waveform transmitted by measuring apparatus 110 is only one waveform, the communication cost can be reduced as in the first embodiment. Further, since the waveform processed by the information collection device 120 is only one waveform transmitted from the measurement device 110, the calculation cost can be reduced as in the first embodiment.

  In addition, when a plurality of current waveforms are added, a phase shift may occur when the current waveforms are added. When the operating state of the electric device 400 is determined based on the current waveform in which the phase shift has occurred, the determination accuracy is low. However, since the home energy management system 100 of the present embodiment generates a simulated waveform from the current waveform measured at one location, no phase shift occurs in the generated current waveform. Therefore, the home energy management system 100 does not cause a decrease in discrimination accuracy based on the phase shift.

  In addition, the current waveform used for generating the simulated waveform is a current waveform at a measurement location where the power value is maximum, which can best extract the characteristics of the device. Therefore, even if the home energy management system 100 discriminates the operating state of the electric device 400 based on the current waveform measured at one place, the home energy management system 100 can maintain high discrimination accuracy.

  The above-described embodiment is an example, and various changes and applications are possible.

  For example, in the above-described embodiment, the storage unit 122 is installed inside the information collection device 120, but the storage unit 122 may be installed outside the information collection device 120. For example, the storage unit 122 may be installed inside an external server on the Internet.

  In the first embodiment, the measurement device 110 combines a plurality of current waveforms into one current waveform and transmits the current waveform to the information collection device 120. However, the measurement device 110 does not combine the current waveform into one current waveform, A plurality of current waveforms may be transmitted to the information collecting device 120. In this case, the measurement apparatus 110 may execute processing such as assigning an ID related to the measurement location to the top of the waveform data so that each current waveform corresponds to each measurement location. Even when not synthesizing a plurality of current waveforms into one current waveform, the measuring device 110 transmits only the current waveform at the measurement location of the power value exceeding the preset threshold value to the information collecting device 120. The communication cost between the measuring device 110 and the information collecting device 120 can be reduced. In addition, since the current waveform processed by the information collection device 120 is only the current waveform at the location where the power value exceeds the preset threshold, the calculation cost of the information collection device 120 can be reduced.

  In step S146, the waveform processing unit 113c adds a plurality of current waveforms to generate one current waveform. In this case, a phase shift may occur in the added current waveforms. This is due to the inductive reactance due to the wiring length of the conductive path and the capacitive reactance due to the capacitor included in other household appliances connected in parallel on the conductive path, resulting in frequency characteristics in the conductive path and a slight shift in the current waveform feature This is because. Therefore, before the waveform processing unit 113c adds the current waveforms, the waveform processing unit 113c measures parameters such as the wiring impedance component and voltage value of each power supply device, and corrects the phase shift of each current waveform based on each parameter. May be. Correcting the phase shift based on the characteristics of the conductive path can improve the accuracy rate of device detection.

  Further, in step S225, it is determined whether or not the electrical device 400 is operating by determining whether or not the matching rate MR exceeds a preset threshold value. The threshold value is not necessarily a uniform value. For example, the threshold value may be different for each registered data. Further, the threshold value may be a value different for each feature quantity such as a frequency band and a phase to be calculated. By setting the threshold value to be different for each registered data and feature quantity, the detection accuracy based on the magnitude of the feature quantity for each electrical device can be adjusted. For example, the detection rate can be improved without lowering the detection accuracy of other electric devices by lowering only the threshold value of the registration data of the electric device having a small feature amount.

  Further, the control unit 124 may record the determination result of the determination unit 123 in the detection result table prepared in the storage unit 122 in association with the time information. For example, the control unit 124 may estimate the power consumption for each electric device 400 or the user's daily behavior pattern using the past usage history of the electric device 400 recorded in the detection result table. Good. The control unit 124 may execute a service such as energy saving advice based on the estimation result.

  The measurement device 110 and the information collection device 120 of the present embodiment may be realized by a dedicated system or may be realized by a normal computer system. For example, the measurement device 110 and the information collection device 120 are stored by distributing a program for performing the above-described operation in a computer-readable recording medium, installing the program in a computer, and executing the above-described processing. May be configured. Further, it may be stored in a disk device provided in a server device on a network such as the Internet so that it can be downloaded to a computer, for example. Further, the above-described functions may be realized by joint operation of the OS and application software. In this case, only the part other than the OS may be stored and distributed in a medium, or may be downloaded to a computer.

  Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope of the present invention. The above-described embodiments are for explaining the present invention and do not limit the scope of the present invention. In other words, 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.

  DESCRIPTION OF SYMBOLS 100 Home energy management system, 110 Measuring apparatus, 111 Current measurement part, 111a-111d Current sensor, 112 Electric power measurement part, 113 Processing part, 113a Electric power information acquisition part, 113b Current waveform acquisition part, 113c Waveform processing part, 113d Waveform information Transmission unit, 114 waveform transmission unit, 120 information collection device, 121 communication unit, 122 storage unit, 123 determination unit, 123a waveform information acquisition unit, 123b operation state determination unit, 124 control unit, 130 display terminal, 200 power supply system, 210 Distribution board, 211 Main breaker, 212 to 216 Branch breaker, 310 Electric vehicle, 320 Solar panel, 330 Storage battery, 340, 350 Power conditioner, 400 Electrical equipment.

The present invention relates to an information output system, a home energy management system, an information output method, and a program.

The present invention has been made in view of such problems, and even when information indicating the operating state of an electrical device connected to a power supply system capable of receiving power from a plurality of power sources is output. An object of the present invention is to provide an information output system, a home energy management system, an information output method, and a program with low cost and calculation cost.

The information output system of the present invention is a system that outputs information indicating the operating state of an electrical device connected to a power supply system capable of receiving power from a plurality of power sources through cooperation between a measuring device and an information collecting device. is there. The measuring device acquires information on the power supplied to the power supply system for each of the plurality of power sources, and supplies power that is specified based on the acquired power information and satisfies a preset criterion. and that acquired the waveform of the current flowing is the power source or et power supply system. Measuring device transmits a waveform information generated based on the waveform of the obtained current information collection device. The information collection device acquires the waveform information transmitted by the measurement device, and outputs information indicating the operating state of the electrical device connected to the power supply system specified based on the acquired waveform information.

ADVANTAGE OF THE INVENTION According to this invention, even if it is a case where the information which shows the operation state of the electric equipment connected to the power supply system which can receive electric power from a several electric power source is output , communication cost and calculation cost can be made small.

Claims (11)

A discrimination system for discriminating an operating state of an electrical device connected to a power supply system capable of receiving power from a plurality of power sources,
The determination system includes a measurement device and an information collection device,
The measuring device is
Power information acquisition means for acquiring information on power supplied to the power supply system for each of the plurality of power sources;
Based on the power information acquired by the power information acquisition means, a power source that supplies power that satisfies a preset criterion is determined, and the waveform of the current flowing from the determined power source to the power supply system is determined as the information. Current waveform acquisition means for acquiring a current waveform to be transmitted to the collection device;
Waveform information transmitting means for transmitting waveform information generated based on the current waveform acquired by the current waveform acquiring means to the information collecting device,
The information collecting device
Waveform information acquisition means for acquiring the waveform information transmitted by the measurement device;
An operation state determination unit that determines an operation state of an electrical device connected to the power supply system based on the waveform information acquired by the waveform information acquisition unit;
Discriminating system. The current waveform acquisition means includes
Based on the power information acquired by the power information acquisition means, determine one or more power sources that are currently supplying power to the power supply system from the plurality of power sources,
Obtaining the current waveform of the determined power source as a current waveform to be transmitted to the information collecting device;
The discrimination system according to claim 1. The current waveform acquisition means includes
Based on the power information acquired by the power information acquisition means, from among the plurality of power sources, to determine the power source that is currently supplying the largest power to the power supply system,
Obtaining the current waveform of the determined power source as a current waveform to be transmitted to the information collecting device;
The discrimination system according to claim 1. The measuring device is
When there are a plurality of current waveforms acquired by the current waveform acquisition means, a waveform processing means for generating one current waveform by adding the plurality of current waveforms acquired by the current waveform acquisition means,
The waveform information transmitting means transmits one current waveform generated by the waveform processing means to the information collecting apparatus as waveform information,
The operation state determination unit determines an operation state of the electric device based on one current waveform generated by the waveform processing unit.
The discrimination system according to claim 2. The measuring device is
Power supplied by a power source that supplies the largest amount of power to the power supply system in the total power consumed by the electrical equipment connected to the power supply system based on the power information acquired by the power information acquisition means Waveform processing means for generating a simulated waveform by multiplying the current waveform acquired by the current waveform acquisition means by a reciprocal of the calculated ratio,
The waveform information transmitting means transmits the simulated waveform generated by the waveform processing means to the information collecting apparatus as waveform information,
The operating state determining means determines the operating state of the electrical device based on the simulated waveform generated by the waveform processing means.
The discrimination system according to claim 3. The waveform information transmitting means includes
Determining whether the sum of the power supplied to the power supply system is greater than a preset threshold based on the power information acquired by the power information acquisition means;
Transmitting the waveform information to the information collecting device when larger than a threshold;
The discrimination system according to any one of claims 1 to 5. The power supply system is a residential power distribution system,
The plurality of power sources are a system power source connected to the in-house power distribution system, and a power feeding device connected to the in-house power distribution system.
The discrimination system according to any one of claims 1 to 6.   A home energy management system comprising the discrimination system according to any one of claims 1 to 7. Discrimination method for discriminating an operating state of an electrical device connected to a power supply system capable of receiving power from a plurality of power sources by cooperation between a first device that transmits information and a second device that receives information Because
A power information acquisition step in which the first device acquires information on the power supplied to the power supply system for each of the plurality of power sources;
Based on the power information acquired in the power information acquisition step, the first device determines a power source that supplies power that satisfies a preset criterion, and determines the power source from the determined power source to the power source system. A current waveform acquisition step of acquiring a waveform of a flowing current as a current waveform to be transmitted to the second device;
A waveform information transmission step in which the first device transmits waveform information generated based on the current waveform acquired in the current waveform acquisition step to the second device;
A waveform information acquisition step in which the second device acquires the waveform information transmitted by the first device;
The second device includes a determination step of determining an operation state of an electrical device connected to the power supply system based on the waveform information acquired in the waveform information acquisition step.
How to determine. The operation state of the electric device is determined with respect to a second device that determines the operation state of the electric device connected to the power supply system based on waveform information of a current flowing in the power supply system that can receive power from a plurality of power sources. A computer that controls the first device for transmitting waveform information for determination;
A power information acquisition function for acquiring information of power supplied to the power supply system for each of the plurality of power sources;
Based on the power information acquired by the power information acquisition function, a power source that supplies power that satisfies a preset criterion is determined, and a waveform of a current flowing from the determined power source to the power supply system is determined. A current waveform acquisition function for acquiring a current waveform to be transmitted to the device of 2;
Realizing a waveform information transmission function for transmitting waveform information generated based on the current waveform acquired by the current waveform acquisition function to the second device;
program. Information on power supplied to a power supply system that can receive power from a plurality of power sources is acquired for each of the plurality of power sources, and power that satisfies a preset criterion is supplied based on the acquired power information. A waveform of current flowing from the determined power source to the power supply system is acquired as a current waveform to be transmitted to the second device, and waveform information generated based on the acquired current waveform is A computer controlling the second device capable of receiving information from the first device transmitting to the second device;
A waveform information acquisition function for acquiring the waveform information transmitted by the first device;
Realizing an operation state determination function for determining an operation state of an electrical device connected to the power supply system based on the waveform information acquired by the waveform information acquisition function;
program.

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