JPS6115527A - Demand controller - 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] [Technical Field of the Invention] The present invention monitors the contracted amount of electricity so that the amount of electricity used in the demand time period is the same as the amount of electricity used in the contracted period.

This is related to a control device that controls the ≠→.・ , ・ , ・□ [Prior Art] Conventionally, there have been devices of this type [2] shown in FIG. 11. In the figure, 1 is a demand control device, 2 is an input device that transmits the measured amount of power used as a pulse signal, a power meter is a communication device, and 3 is a load. The demand control device 1 includes an arithmetic processing unit (CP''U)'4, an input control unit 1J, an indication setting unit 6, a control relay part T, an alarm relay part 8, a time limit part 1'1, and an output bias control unit. 12. 9-1 to 9-n are loads that are cut off for the purpose of power adjustment, and 10-1 to 10-n are loads that issue a demand alarm (for example, a bell).

Transmission device fi? Since the N power meter 2 has a transmitting function, it transmits a pulse signal proportional to the amount of power used by the load 3. The input control unit 5 receives this pulse signal and counts it.The time limit unit 11 measures the demand time and counts it.
7. Generates a demand time limit value of, for example, 30 minutes, and outputs a calculation signal that determines the calculation interval at fixed time intervals. The arithmetic processing unit 4 is on the human power side. Limited 6.6
．．・Predicting the demand at the end of the Might time limit
Calculation is performed, and it is determined whether this lower demand value exceeds the target demand value set in the representation setting section G, and if it exceeds this, one alarm signal is generated. M]□
1h Then, calculate the adjusted power based on this demand value, and -
□ Input the cutoff*'4 value set in the rectifier system display setting section 6.
When the load is exceeded, a second alarm signal is generated and a load shedding signal is also generated. These alarm messages 4. An input i is input to the control unit 12 of the control unit 1j, and the corresponding relay in the relay unit B is driven to control the load 1O-1-1O-n. On the other hand, the load cutoff time number drives the corresponding relay of the control relay part 7 to control the cutoff of the corresponding loads 9-1 to 9-n.

Conventional demand control devices are configured as described above, so they can be used to individually control loads when the loads to be controlled are scattered over long distances or when demand warnings are sent to multiple locations. It is necessary to run a power line from the demand control device to the load, and especially if the wiring distance is long, the construction cost is huge compared to the demand control device...Also, the number of load points to be controlled is For consumers who do not need load control or demand alarm output, there are functions that are not used because they are expensive compared to the required functions. There was a request to somehow make it cheaper by cutting down on it.

[Summary of the invention]

This invention was made in order to eliminate the drawbacks and disadvantages of the conventional ones as described above, and it is equipped with a base unit, an alarm unit, a control unit, and a unit, and by making each of them separate and independent, they can be used as desired. The purpose of this invention is to provide a demand control device that can be easily installed at any location and that can also perform schedule control through simple connections.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention. Base unit 100
is a unit having the central function of this device, and receives the pulse signal of the watt-hour meter 2 at the input control section 101 and counts it.

The time limit unit 102 generates and outputs a demand time limit of, for example, every 30 minutes, and also outputs a calculation signal that determines a calculation interval at a fixed time interval. The arithmetic processing unit 103 calculates the demand value at the end of the demand time period based on the count value of the input control unit 101 and the remaining time limit of the time limit unit 102, and determines that this demand value corresponds to the target deind value set in the setting unit 104. It is determined whether or not the limit is exceeded, and if the limit is exceeded, a first alarm signal is generated.

In addition, the arithmetic processing unit 103' calculates the adjusted power based on this demand value, and when an alarm signal is generated, this value is set in the setting unit □1.
When the cutoff power value set in O□4 is exceeded, a second alarm signal is generated and a load cutoff signal is generated.

'Also, in order to perform schedule control according to the settings of the setting unit 104 and schedule day classification setting unit 110 of the base unit 10O, the arithmetic processing unit 1'03 determines the daily classification of each day, such as weekdays, holidays, specific days, and day classifications ( For example, weekday mode,
The on time (or off time) set in the holiday mode, specific day mode) is stored in the memory circuit section 109, and this is stored in the clock circuit section 108 that measures the current 1-1 classification and the current time. The contents are compared at fixed time intervals, and if the two match, a large load signal (disconnection or load cut signal) is generated.

These signals are displayed on the display section 105 and are also passed to the signal transmission section 106. The signal transmission section 106 converts the signal from the arithmetic processing section 103 into a transmission signal as described above, and transmits it to the control unit 30 via the lines 131 and 132. In the control circuit, the cut 300 inputs, for example, the load 501 connected to the control relay part 306 as described above.
or off) control.

Note that the transmission signals of the transmission signal lines 131 and 132 are composed of serial signals based on, for example, a baseband system. Therefore, for example, two-core twisted pair cables or the like can be used for the signal lines 131 and 132.

These calculation results and alarm signals are sent to the display section 105,
This will be displayed. Further, these data are passed to the signal transmission section 106, converted into a transmission signal which will be explained in detail in connection with FIG. - Since the 0 transmission τ signal is received by the signal transmission section 202 at the 2Q port (alarm x = 7), the signal transmission section 202 demodulates the received transmission signal into a signal at a normal logic level. Next, the arithmetic processing section 2
03 is an address setting unit which sets the address given by the demodulated signal; 2.03; It compares it with its own address set in O4 to determine if it matches, and if it does, it receives the demodulated signal as addressed to itself, and processes the data accordingly. execute,
A signal is output to the output control section 205.

In response to this, the output control unit 205 outputs the alarm relay part 2.0.
6, and controls the corresponding load 401, for example.

Similarly, the transmission signal is transmitted through the signal line 132 and the control unit 3
The signal is received by the signal transmission unit 3O2 via the terminal 301 of 00. As a result, the arithmetic processing section 3.03, 7 dress setting section 304, output control section 305 and control relay section 30
6 performs the same operation as described for the alarm unit 200, and transmits the load 501 according to the contents of the month.
~50n is controlled.

Figure 3 (F1-C; Transmission section 106, 202 and 30
2 is a formant diagram of the transmission bond 5 that is sent and received.

Using the transmission signal of the S machine IDtlid diagram, the sequential boring method eko', the remote control unit, and the kachippo unit 200
and control; pull out the 1-tsu l-300 1°7 and set the required 4
-1 This is for sending and receiving Mandoya data. In FIG. 3, the address word (AW) 6 is first sent with [transmission signal] 7. In order to identify which slave unit 7 is being transmitted from the base unit 100 to 6 O1. Therefore, the slave unit that matches the address given by the address setting units 204 and 304 of the slave unit becomes the transmission phase q=.The control word (CW) 6 to be sent next.
02 is 5 from the base unit 100 to the slave unit that is the transmission partner.
, which are commands indicating what kind of operation to perform, and can be broadly classified into two operation modes, for example, a control operation mode and a data length specification mode.

In other words, when controlling a slave unit in some way, for example, a specific code is associated with a certain control action, and when the slave unit receives that code, it decodes the code and performs the corresponding action in advance. It is. In addition, the data length specification code is used to specify the data length to be sent when exchanging data with a slave unit, and it is used to specify how many bytes per data node is, which will be described later. It's true. For example, when the code is o OH, the data is 0 bytes,
When this =- code is 018, the data is 1 byte, and when this code is 02-1, the data is 2 bytes.
, and so on, so that the clock data length of 08H consists of 8 bytes. The one-sim check word (SCWO) 603 that is sent next has a value that is the sum of the address word 601 and the code of control word 02, and is used to check for errors that occur in the transmission signal during the transmission process. . That is, the contents of the address word 6O1 and the control word 602 received on the receiving side are added, and the resulting value is compared with the value of the sum check word 603. Only when they match, are they transmitted normally. I judge that. Next, the data word (DWO
-DW7) 610 to 617 are sent. These data words 610 to 617 are data sent and received when data is transmitted between the base unit 100 and the slave unit, and are transmitted when the aforementioned control word 602 is a code corresponding to the data length specification mode. . That is, for example, when the 2J control word 602 is 03 )(, the data word is 6
It consists of 3 bytes of 10,611,612, and O
At 5H, data words are 610, 611, 612, 6
It consists of 13,614 5 bytes. A second sum check word (5
CW) 618 has the content of the addition result obtained by adding all the codes of data words 61O to 617 to the address word 6o1, control word 602, sum check word 6O3, and sending 7, excluding the overflow. This word is also used to check for transmission errors as described above, and the operation on the receiving side is almost the same as that of the sum check word 6O3.

FIG. 4 is a t-format diagram showing a more detailed structure of the ID address word 601, control word 602, and sum check word 603. For example, address word 60m has a start bit removed at the beginning, then signal bit 6 (Nb), and finally a stop bit 601e.

FIG. 5 is a format diagram showing address word 601 in more detail. first start) 601
m exists, then signal beep) (BO-B7) 6011
) is transmitted in a 9-bit configuration. The last bit of these is parid bit 6 for error checking! It is J1d. Finally, there is a stop bit 601c.

This bit configuration includes a control word 602, a sum check word 603, and a data word 61O to 617.
The same applies to the sum check word 618.

Signal transmission is performed using the data structure described above.

Ru. Here, the transmission completion error is checked on the receiving side by checking the sum check words 603, 618 and the parity bit for each word. In other words, when a transmission signal in the format shown in Figs. I can't find it, decipher Ato1/Swardro01 to see if it's a signal or not;2
Make a judgment. Furthermore, when an error is detected in the parity bit and sum check word 603°618, the de-toward G10-617 ignores the error, and the base unit 100 sends the ``p'' on the 46th. Of course, if there is an error in the address word 601, an error may also occur in sending the signal 4 to the slave device at the address 1'.

In this case, since the applicable slave device does not exist,
The base device 100 waits for a certain period of time for a return signal indicating the completion of an operation or for data transfer from the slave device. Part 11. If there is no return transmission signal, send the same signal as on the 11th to the corresponding handset.The handset correctly receives this retransmitted signal. 7, the result is sent back to the base unit 100. If an error occurs in the reception of the signal sent again, the signal cannot be sent back to the base unit 100, so the base unit 10 indicates that there is an error in the slave unit. It is assumed that the address is present and the polling operation is moved to the next address.

In addition, in the above embodiment, for convenience of explanation of the Vj control unit, we have explained the case where one alarm unit 200 and one control unit 300 are connected, but of course it is also possible to connect as many units as necessary. It is possible to arrange these slave units in distributed locations, and send and receive necessary codes and data from the base unit 100 to each of them.

Note that since the number of slave units connected can be various, the number of t↑ of the terminal units can be determined by some means Ctj+,'
, u i 1 line requires unnecessary polling operations, which is disadvantageous in terms of power, waste, and transmission processing capacity. To do this, setting means such as setting the number of slave units connected to the base unit 100 using a switch or the like, or inputting the number of connected units using a keyboard or the like and storing it in the internal logic circuit τ. - It can also be provided with a storage means.

In addition, when the power is turned on as a system without setting, as an initial process, the slave unit 100 accesses the slave units one by one from the base unit 100 side, determines that only the slave unit at the address that responded is connected, and stores the address of that slave unit. If configured to do so, the setting means can be made unnecessary.

In addition, although the above embodiment has been explained using the case where load shedding control is performed as an example, when there is a margin in the adjusted power and load injection control is performed, similarly, the injection control is performed only for the load that has been cut off by schedule control. Do the following.

〔Effect of the invention〕

As described above, according to the present invention, the conventional demand control device has an independent and separated device configuration such as a base unit, an alarm unit, and a control unit, so that the load to be controlled and the location where alarms are notified may be located far away. , or if they are dispersed, wiring work can be done easily and at low cost.

Furthermore, since the alarm unit and control unit can be selected as needed, a configuration suitable for the required functions can be assembled, which has the effect of eliminating waste in terms of function and price.

Furthermore, each unit can be placed and installed where it is needed.
Schedule control can be performed without changing the system configuration by setting from the parent device, and there is no need for dedicated equipment for schedule control, resulting in labor and power savings.

In addition, to check for transmission errors, a parity check is performed for each word, a first sum check word is applied to the address and control words, and a second sum check word is applied to all transmitted data.
The system is configured to add a sum check word for transmission to increase transmission reliability, which has the effect of maintaining high transmission reliability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional demand control device, FIG. 2 is a block diagram showing an embodiment of the demand control device according to the present invention, and FIGS. 3 to 5 show transmission signals of the device shown in FIG. It is a format diagram. 100... Master station, 101... Input control unit, 102...
...Time limit section, 103, 203, 303... Arithmetic processing section, 104... Setting section, 105... Display section, 106,
202゜302...Signal transmission section, 108...Storage circuit section, 109...Clock circuit section, 110...Schedule day division setting section, 200...Alarm unit, 204
, 304... address setting section, 205, 305...
Output control section, 206... Alarm relay, 3oo... Control unit, 306... Control relay part, 401-40
n, 501-50n..., load. In addition, in the figures, the same reference numerals indicate the same parts.

Claims (1)

[Claims] Calculate the predicted demand value at the end of the demand time period from the data indicating the actual power usage detected from the power receiving point,
When this predicted demand value is predicted to exceed a predetermined target demand value, a first alarm signal is generated, and the current adjusted power value at the load calculated from the above data exceeds the predetermined cutoff power value. an arithmetic processing unit that generates a second alarm signal and a load shedding signal when the above-mentioned alarm signal and a load shedding signal are sent, and generates a slave address and a load address indicating the destination of each of the above-mentioned alarm signals and load shedding signals, and output from this arithmetic processing unit; A first signal transmission unit that converts each signal including the above-mentioned alarm signal, load cutoff signal, handset address, and load address into a time division multiplexed transmission signal consisting of a repetitive predetermined transmission format and sends it to the signal line. , a clock circuit that supplies signals indicating set predetermined on and off times to the arithmetic processing section, and a schedule day division setting section that supplies a signal indicating the set schedule day divisions to the arithmetic processing section. and a unique self-address that is connected to the master station via the signal line and is given in advance the slave unit address obtained by receiving and demodulating the transmission signal received from the signal line. A second signal transmission section outputs a signal including the above-mentioned alarm signals, a load cutoff signal, and a load address obtained by demodulating the above-mentioned transmission signal when the above-mentioned transmission signal matches, and the load specified by the above-mentioned load address is transmitted to the above-mentioned alarm signal. a first slave device having an alarm unit that controls the above, and a second slave device having the second signal transmission unit and a control unit that cuts off the load specified by the load address in accordance with the load cutoff signal. A demand control device comprising: a demand control device that performs schedule control by transmitting different upper load cutoff signals for each day category to the control unit according to signals from the clock circuit section and the schedule day section setting section;