JPS62226400A - Quantity of electricity measuring system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power estimation system for measuring the power consumption m of each electrical device used in a home, a building, a factory, etc.

(Prior art) Electric ID devices generally used in homes include refrigerators whose power consumption is almost constant throughout the day, air conditioners that are often used during specific hours, televisions, and There are hair dryers, stereos, etc. that are only used for a short period of time. In addition, some equipment used in buildings and factories can rapidly increase the amount of electricity used during certain hours.

Incidentally, in recent years, there has been a demand for grasping the power usage status of each electrical device in a sampling manner in order to predict power demand trends. For this reason, the amount of power used has conventionally been grasped by a system as shown in FIG. This system measures the amount of power used by connecting, for example, a power consumption measuring device 3 to the power supply cord 2 of an electric refrigerator 1 as an electric separate device.

Note that this power usage meter 3 has a configuration as shown in FIG. A frequency signal proportional to the amount of electricity used by the refrigerator is sent to the counter 3-2.
Send to. Then, a time signal is sent from the time clock unit 3-3, and the count value of the counter 3-2 is sent to the memory 3-4 to be stored therein. At this time, the counter 3-2 is cleared, so that the memory 3-4 stores count values corresponding to the amount of power used for each fixed time period as usage data in order from the address with the smallest address. Then, for a certain period of time, for example, every month, the staff member carries the data collection device 4 and connects it to the connector 3-5 of the power consumption layer measuring device 3, and the data transmission control unit 3-6 is activated. The usage data is transferred to the data collection device 4. In this way, usage data for each electrical device is collected.

(Problems to be Solved by the Invention) However, the above system has the following problems.

In other words, since usage data is collected for each electric rescue device, a large capacity memory is inevitably required.

In addition, since the timings of sending out the time signal between the electric power usage measuring instruments 3 for each electric appliance do not match, the usage data of each electric appliance becomes inconsistent in terms of time.

Therefore, in order to solve the above-mentioned problems, the present invention provides a power measurement system that can reduce the memory capacity and ensure the simultaneity of usage layer data. In the power measurement system for determining the power consumption of the device by collecting a measurement signal of the power ω of the device, the base unit includes a first memory that sequentially stores the power consumption of devices that are constantly operated in a memory. and a second storage means for storing the amount of power used by a device operating at any time in a memory in accordance with a predetermined format for each time period when the device is activated, to achieve the above object. .

(Function) By providing the above-mentioned means, the present invention sequentially stores the amount of power used by devices that are constantly operated in the memory by the first storage means, and stores the amount of power used by devices that are operated at any time in the second memory. The storage means stores each time period in the memory according to a predetermined format during its operation.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram of the power amount measurement system.

In the figure, 10 is a parent device, and a plurality of children 112-1 to 12-n are connected to the parent device 10 via a power distribution line 11. These children 112-1 to 12-n each have a television 13=1, a light 13-2, a refrigerator 13-3, and so on. Other electric devices 13-4 to 13-n are connected, and the function is to detect the amount of power used by these electric devices 13-1 to 13-n and send out a measurement signal proportional to this. Note that 14 is a distribution board, and 15 is a filter that prevents measurement signals from leaking to the outside.

By the way, the parent mio has the following functions. That is, a synchronization signal is sent to all slave units 12-1 to 12-n at intervals corresponding to the number of slave units 1112-1 to 12-n,
This is an art in which the power consumption is calculated and stored by taking in the measurement signal for each of the children 112-1 to 12-n. In addition, each electrical device 13-3 to 13-n is included in the base unit 10.
Among them, electrical appliances that are constantly operated, such as refrigerators 13-
a first storage means for sequentially storing the amount of usage of the electrical equipment 13-1 to 13-n in a memory; and second storage means for storing the information in the memory. The specific configuration is as shown in FIG. 2, in which a data injection transformer 101 and a power transformer 102 are connected to a power distribution line 11.

The data injection transformer 101 transmits the synchronization signal to the distribution line 11.
It has the function of superimposing the power waveform on the power supply waveform and extracting the measurement signal superimposed on the power supply waveform. A weighing signal receiving section 103 and a synchronizing signal transmitting section 1.4 are connected to the other side of the transformer 101, and these weighing signal receiving section 103 and synchronizing signal transmitting section 104 exchange signals with the main control section 105. It is designed to carry out exchanges. The power transformer 102 also includes a half-wave rectifier diode.
A half-wave rectified signal S from the board 106 is shaped into a clock signal CP by a waveform shaping circuit 108 and sent to the main control section 105. The main controller 105 also receives a time signal from a timer 109, so that the main controller 105 transmits the weighing signals from each child 112-1 to 12-n to each child tj11 according to the clock signal.
It has an open surface for taking in and counting each of 2-1 to 12-n and storing each count value in the memory 110.

Now, the main control section 105 has the first and second storage means, and the memory 110 has data blocks formed in the format shown in FIG. That is, this data block contains the measurement start time S, the measured value M of the current time period, the (addition value Q up to the current time period, the maximum value G up to the current time period, the minimum value F up to the current time period, the average value up to the current time period) It consists of an area for the current time period and an area for the weighing end time E. Therefore, in the first storage means, the weighing value M for the current time period and the weighing end time E are sequentially stored using a format that excludes the weighing value M for the current time period and the weighing end time E. In addition, the second storage means uses the data block shown in FIG. 3 to calculate the measurement start time S, the measured value M of the current period, the cumulative value Q up to the current period, and the maximum l up to the current period for each period.
IG, the minimum value F up to the current time period, the average value I up to the current time period, and the measurement end time E are stored.

Next, the operation of the system configured as described above will be explained. It is assumed that 8 child devices 12-1 to 12-n are connected, and the child device number "1" is set to the child device 1fi12-1, and the child device number "2" is set to the child device 1112-2. but,
Handset numbers "3", . . . are set for the handset 12-3, respectively. At 1110, the power supply waveform is sent as a half-wave rectified signal S by the half-wave rectifier diode 106 to the waveform shaping circuit 108, where it is shaped into a clock signal CP. This clock signal CP is counted in the main control section 105, and when this count value reaches "8", a synchronization signal Z is sent out. This is because eight children 112-1 to 12-n are connected. This synchronization signal Z is sent to the synchronization signal transmitter 1
04, the signal is superimposed on the power supply waveform from the data injection transformer 101. That is, when the synchronization signal 2 is output at time C1 as shown in FIG. 5, it is superimposed on the power supply waveform E. Note that when the synchronization signal Z is superimposed, it is superimposed for a period slightly longer than the (1/4) period. This synchronization signal Z is transmitted to each child 15!112-1 to 12-n through the distribution line 11, and as a result, each child f112-1 to 12-n detects the power cycle from the time when it receives the synchronization signal Z. This count value is compared with the handset number. Here, the child number "1" is set in the handset 12-1, so click! - When the side becomes "1", the measurement signal M1 is sent out during the period C1 as shown in FIG. Next, when the count value on the handset 12-2 becomes 12, period C
2, a metering signal M2 is sent out. In other words, a total of M signals N111 are sequentially transmitted from each slave unit 12-1 to 12-n every cycle.
~M8 is sent.

Now, when the parent 10 sends out the synchronization signal Z, the measurement signals M1 to M8 from each child 12-1 to 12-n are sequentially sent from 1 to the measurement signal receiving section 103 through the data injection transformer 101.
The metering signal is received by the main controller 105, and then stored as data in the memory 110 under the control of the main controller 105. Therefore, storage into the memory 110 is executed as follows. Here, for example, television 13-
1. Electric light 13-2. Refrigerated Ji! ! The case where 13-3 operates during the period shown in FIG. 5 will be explained. In this case, the storage form in the memory 110 is as shown in FIG. 6. In other words, television 13-1 and electric light 13
Since the refrigerator 13-2 operates during an arbitrary period, its power consumption m data is stored in the memory by the second storage means, and since the refrigerator 13-3 is always used, its power consumption data is stored in the memory by the first storage means. 110. Specifically, as shown in FIG. 5, when the television 13-1 is used during a period of time 1 to 3, the maximum power consumption data for this period is stored in data block Wa1.

In other words, the time [1] is stored at the measurement start time S, and according to the format of the data block roughly shown in FIG. t3 is stored. Then, when the television 13-1 is used again from time t5 to time t16,
The power usage data during this period is data block Wa2.
is memorized. In other words, the time t5 is stored at the measurement start time S, and furthermore, according to the data block format shown in FIG.
...Time t6 is stored as the measurement end time E. Also,
As shown in Fig. 5, the electric lights are turned on at times t2~℃4 and t5~
[Used in each period of 7. Therefore, these periods t
The same power usage data from 2 to t4 is data block W.
b1, and power usage data for the period t5 to t7 is stored in data block Wb2.

On the other hand, the power usage data of the refrigerated store 13-3 is stored as 1 in the data block. In other words, in this data block, 1 is obtained by removing the measurement value M of the current time period and the measurement end time E, and the cumulative value Q up to the current time period is sequentially calculated every time a measurement signal is taken in. The maximum value G up to the time limit, the minimum value F up to the current time limit, and the average value ■ up to the current time limit are determined.

In this embodiment, the base unit 10 has a first storage means that sequentially stores in the memory 110 the usage amount of the electrical equipment 13-3 that is constantly operated among the electrical equipment 13-1 to 13-n. and a second storage means for storing in the memory 110 the amount of use of the electric carriers 13-1 and 13-2 that operate at any time among the electric devices 13-1 to 13-n according to a predetermined format at the time of operation. Therefore, the area used for the memory 110 is reduced, especially in the first storage means, and the memory 110 can be small in size. Since each of the stored power usage data has both the measurement start time S and the measurement end time E, the simultaneity of each power usage data can be obtained, and it is possible to understand the power usage situation close to reality. .

In addition, for factories, buildings, etc. where there are sudden load fluctuations, the second storage means is used to store the data in Figure 6 Wa1 and W
A data block such as B2 can store the amount of power used during peak load. Furthermore, it is possible to determine whether a child R12-1 to 12-n has failed by changing the frequency of the measurement signal or by the presence or absence of its output, and the failure period can also be stored in the memory 110.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to provide a power measurement system that can reduce the memory capacity and ensure the simultaneity of usage data.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram showing one embodiment of the electric power measurement system according to the present invention, Fig. 2 is a specific configuration diagram of the main unit of the system of the present invention, and Fig. 3 is a schematic diagram showing the configuration of data blocks. Figure 4 shows the total ffi (i @
FIG. 5 is a schematic diagram showing an example of the operating period of each electrical device; FIG. 6 is a diagram for explaining the memory function of the amount of power used in the system of the present invention; FIG. 7 and FIG. 8 is a diagram showing a conventional power consumption collection system. 10... Main unit, 11... Distribution line, 12-1 to 12-
n-...child, 13-1 to 13-n-, electric appliance tiling device, 101...data injection transformer, 102...power transformer, 103...weighing signal receiving section, 104...
- Synchronization signal transmitting section, 105... Main control section, 108...
・Waveform shaping circuit, 109--Time clock section, 110...
·memory. Applicant's representative Patent attorney Takehiko Suzue tl t2 13 t4t5 t6
t7Figure 5Figure 6Figure 7Figure 8

Claims (1)

[Claims] In a power measurement system that collects measurement signals of power consumption of each device measured by each slave device by a base unit to determine the amount of power used by the device, the base unit is one of the devices that is constantly operated. a first storage means for sequentially storing the amount of power used by the devices in the memory; and a second storage device for storing the amount of power used by the device operating at any time in the memory for each time period according to a predetermined format when the device is activated. An electric power measurement system comprising: