JP2000116000A - Power demand controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance workability and cost efficiency and improve demand control including evacuating process (slide-up function), by grouping the components of equipment into observation system, processing system and transfer command system, and arranging the systems in such a manner that the systems can be separated. SOLUTION: A power demand controller X comprises an observation system A including a supply wattmeter 1, a pulse converter 2 and a pulse transmitter 3, a processing system B including a transmitting wave transmitter-receiver 4 and a processor 5 for control comprising a control input section 5a, a computing section 5b, a precedence-dependent equipment starting and stopping means 51, a time-dependent equipment starting and stopping means 52 and a control output section 5c, and a transfer command system C including a transmitting wave repeater 6 and a spread spectrum communication means for transmission from the transmitting wave repeater 6 to equipment 9 to be demand-controlled through power lines 10 for load. The systems A, B and C are installed so that they are independent of one another and can be separated from one another, and the systems are linked with one another so that they can communicate with one another by specific small power over the air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a power demand control device, and more particularly, to a unit time limit (demand time).
Within the sampling period, the power consumption (current demand) of all power loads is sequentially monitored for each sampling cycle, and the predicted power consumption expected to be reached at the end of the time period is calculated and determined, and the upper limit index of the power consumption in demand control ( The target power amount, which is the maximum demand power amount, is calculated and corrected successively, and the new target power amount is automatically determined. The present invention relates to an electric power demand control device improved to perform immediate demand control in cooperation with load adjustments of two dependent systems.
Hereinafter, the unit time period (or the monitoring time period) and the demand contract time, and the time period update and the time period start are used interchangeably.

Here, terms related to the present invention will be briefly described. Terms that are not mentioned here are commonly used terms and will not be described.

"(New) target electric energy": the maximum demand electric power of 100% or less (effective power consumption range) of the demand contract electric power, and an upper limit index (value) of the reached electric power in the demand control; It becomes. The new target power amount is calculated (or set) within the effective power amount range for each unit time period or for each sampling period within the unit time period, and is automatically determined.

[0004] "Current demand": the actual value of the current power consumption.

"Timed signal": A timed output synchronized with a transaction wattmeter having a measurement time of 30 minutes (demand contract time).

"Base power (amount)": The power value (amount) of electrical equipment such as a factory line or infrastructure that cannot be adjusted (cut off).

“Contract power (amount) before installation”: Contract power value (amount) before introduction of the demand control device.

"Contract power after installation (amount)": Contract power value (amount) associated with the introduction of the demand control device. [= Demand contract power (amount)]

"Demand control rate": a limiting factor for calculating a (new) target power amount within a predetermined time after a unit time period update (start) (within a control mask time described later) or during a slide-up setting. Thus, in the formula, an increase in the demand control rate acts as an item for reducing the (new) target electric energy.
In other words, it may be regarded as a ratio that tightly controls the operation rate of the demand control target device.

"Target control rate": An increase rate [%] for optimizing the target power amount according to the predicted power amount after the demand control is started. The target power rate is multiplied by the power amount (excess power amount) obtained by subtracting the target power amount from the predicted power amount, and the percentage is added to the target power amount to correct the new target power amount. By setting the target control rate to plus,
Since the new target power amount (ideal power line) is rewritten for each sampling cycle within the effective power amount range, the (new) target power amount can be approximated (shifted) to the expected power amount.

"Interruption mask time": Stop time of the equipment to be demand controlled.

"Control mask time": A grace period for processing calculation until the progress status (trend) of the current demand is determined immediately after the start of the unit time period and the (new) target power is determined, and in the previous unit time period. This is a control save or preparation time (maximum waiting time) until the interruption is shifted to the updated unit time and the return processing is performed. Therefore, the end of the control mask time is the control start point. 210 for the present invention
Set seconds.

[0013]

2. Description of the Related Art In recent years, importance has been placed on the maintenance of a comfortable environment as well as cost savings including energy saving in the operation of equipment in factories and buildings.

Under such circumstances, the maximum demand power is suppressed within the range of the demand contract power determined by the power consumer with the power company, and the load equipment is effectively used (leveling and maintaining environmental conditions). Etc.) as a technical solution, the power consumption of all power loads in the facility is monitored, and when this power consumption is predicted to exceed a predetermined power consumption (demand contract power consumption), the demand control target 2. Description of the Related Art There is known a power demand control device that adjusts a load of a device to limit the power consumption.

Here, the demand control target devices include:
Air-conditioning equipment is one of the leading devices in that the number of installed devices and the amount of load power are large and the influence of short-time interruption is small.

[0016] The demand control specifically includes monitoring, recording, prediction and alarm, and is a functional and technical means for selecting a demand control target device (power load) and starting / stopping or limiting the output. There have been many proposals in the prior art, for example, Japanese Patent Application Laid-Open No. 1-114655 (in which a fixed order related to equipment stop is configured) and Japanese Patent Application Laid-Open No. 62-37018 (in which a priority is configured). Was.

The above-mentioned conventional apparatus is generally studied at the stage of designing a building and at the stage of selecting an air conditioner, and it is planned that a system will be constructed together with installation of facilities such as arranging various sensors required for control. It does not feature a means configuration that can be called an add-on (add-on) as an additional function.

With respect to the present invention, as described in the above-mentioned conventional example, demand control in which power load is cyclically started and stopped in a fixed order cannot be appropriately adjusted (limited) according to environmental conditions. It is pointed out that there are some cases, and it may be understood as such.

However, on the other hand, there is an advantage that the control device can be simplified and can be periodically shut off. When an additional function is to be introduced (extra installed) into an existing facility system, the above-mentioned disadvantages are as follows. Can be improved.

That is, since the environmental conditions of the installation destination can be evaluated in advance, the harmful effects when the fixed order is determined can be eliminated to some extent. Is easy.

As a practical problem, in a building or a hotel, a large number of air conditioners during automatic operation are centrally managed.
Variations in the difference between the room temperature and the set temperature and defective locations can be checked and repaired.

Of course, this does not deny detailed sensing for environmental conditions in the equipment (each room).
Existing facilities vary widely in scale, and in view of the fact that a power demand control device will be introduced later, a simple, inexpensive and quick-acting one is desired.

Under these circumstances, the applicant of the present invention has previously described an electric power demand control device (Japanese Patent Application No. Hei 8 (1996)) which is easy to install, has an immediate effect on load control for a demand contract power amount, and can secure the minimum allowable environmental conditions. No.-93133, hereinafter referred to as a prior application device).

[0024]

However, in the prior application, the target electric energy [the upper limit of the electric energy used for control within the range of the demand contract electric energy. ] Is treated as a setting input value, and a setting input (change) is required each time the target power amount is raised or lowered in accordance with a change in the maximum demand power amount (actual amount value). Of course, demand control is performed functionally, but it is difficult to perform fine control for energy saving, that is, demand control by automatically determining a new target power amount for each sampling cycle (described later).

Further, the target electric energy is a uniquely set invariable value, and the fluctuation of the control is not allowed. That is, when the predicted power amount exceeds the set target power amount, the control output relating to the stop of the device is only performed immediately, and the target power amount is sampled in the effective power amount range (less than the demand contract power amount). There was no function of updating every cycle and executing demand control following this.

The evacuation process (slide-up control according to the present invention) which can be selected by setting at the time of introduction of the apparatus, for example, during 24 hours (1 day) operation (control), the estimated electric power is increased due to an increase in the base electric energy. If the power is likely to increase significantly, evacuate out of the maximum demand power range or out of the demand contract power range to avoid the abnormal situation in which the normal and limit cutoffs are performed without interruption. There is no processing function that prioritizes maintenance and prevents equipment damage to the overall power load.

Further, from the viewpoint of the equipment system, the components of the prior application are connected to each other, and the wiring to each power load (in general, there are a large number of demand control target devices) is required for construction. And the introduction cost was considerable.

The present invention has been made in view of such circumstances, and provides an improved power demand control apparatus which solves the above-mentioned problems and enables more appropriate demand control in accordance with a use situation. Is what you do.

[0029]

SUMMARY OF THE INVENTION In order to solve the problems, the present invention provides an improved power demand for performing an immediate demand control in cooperation with a fixed order and load adjustment of two systems depending on the passage of time. Device, the base power amount of the power load that is not subject to demand control in the facility, the load capacity of the demand control target device, the contract power amount before the demand contract,
Set and input the demand contract power and the number of loads of demand control target equipment, and sequentially monitor and use the power consumption of all power loads within the unit time period, and sequentially calculate and determine the predicted power consumption for each sampling cycle. In addition, when the target power amount is sequentially calculated and corrected, the new target power amount is automatically determined, and while following the new target power amount, the predicted power amount becomes larger than the new target power amount or the demand contract power amount. In addition, two systems of load adjustment (start / stop) are performed on the demand control target device, and the demand control is restarted every time the unit time period is updated. However, the stopped (interrupted) demand control target devices sequentially return after a lapse of a predetermined time (interruption mask time) regardless of the time period update.

The characteristic configuration of the apparatus of the present invention is that an observation system includes a pulse transmitter for detecting a current power consumption from a transaction wattmeter via a pulse converter and transmitting a demand pulse signal; A transmission wave transceiver for receiving the demand pulse signal and a control processing device, wherein the control processing device is set and input to a demand pulse signal output and a timed signal output output from the transmission wave transceiver. A control input unit that uses as input sources the base power of load equipment not subject to demand control, the load capacity of demand controlled equipment, the contract power before demand contract, the demand contract power, and the number of loads of demand controlled equipment. And, based on each of the control inputs, the current power consumption for each sampling period within the unit time period, and the predicted power amount expected to reach at the end of the time period. A processing operation unit that sequentially calculates and corrects the power, and sequentially calculates and corrects a target power that is an upper limit index (maximum demand power) of the power consumption on demand control to automatically determine a new target power; When the predicted power amount exceeds the new target power amount, the demand control target devices are sequentially stopped in a preset order, and
A rank-dependent device start / stop means for returning after a predetermined time, and when the predicted power amount immediately before the end of the unit time period exceeds the demand contract power amount, the demand control target device is forcibly stopped entirely and the next time period A time-dependent device start / stop unit for sequentially returning after a predetermined time elapses from the start, and a control output unit for transmitting control information relating to start / stop based on an output signal from each of the device start / stop units; As a command system, a transmission wave repeater for receiving the control information sent from the transmission wave transceiver, and a spread for transmitting each of the control information from the transmission wave repeater to a demand control target device via a load power line. It has a spectrum communication means.

Here, the observation system, the processing system, and the transmission command system are separately installed independently so that they can be separated between the pulse transmitter of the observation system and the transmission wave transceiver of the processing system, and the transmission wave transceiver of the processing system. And the transmission wave repeater of the transmission command system are communicatively linked to each other by specific low-power radio.

[0032]

According to an embodiment of the present invention, in the above configuration, the processing operation unit of the control processing device sets a control mask time from the update of the unit time period (start) to the start of the demand control, and Within the mask time, calculate the predicted power amount with the demand control rate introduced for each sampling period, and leave the maximum value at the end of the control mask time (control start time)
, And after the control is started, the new target power at the end of the unit time period is sequentially determined by calculating and rewriting the new target power with the target control rate introduced for each sampling period. It is assumed.
However, when the calculated new target power amount exceeds the demand contract power amount or falls below the base power amount, the new target power amount is determined with 100% of the demand contract power amount.

In addition, the order dependent device start / stop means performs a cyclic normal shut-down and a sequential return to the demand control target device, so that when the predicted power amount exceeds the new target power amount, the demand control target device is switched off. A signal indicating whether or not start / stop is necessary for the sequential stop processing and the sequential return processing based on the elapse of the stop time of each demand control target device is output, and the time dependent device start / stop means completely shuts down the demand control target device. In order to perform the return after the time period update, when the predicted power amount exceeds the new target power amount within a predetermined time immediately before the end of the time period, a complete stop processing of the demand control target device,
After a predetermined time elapses with the start of the next time period, a signal is output as to the necessity of start / stop for the sequential return process based on the stop time history of each demand control target device.

Further, the processing operation unit has a slide-up control means, and the power load of each power load is changed during the 24 hours a day such that the predicted power amount exceeds the contract power amount due to a large fluctuation in the operation of the power load. When an abnormal situation occurs in which the effective operation time cannot be secured, when the first abnormal situation occurs, the predicted power amount is shifted as a slide power amount separately from the automatic following of the target power amount to set a new target. The power amount is calculated and determined, and the power is temporarily evacuated. further,
On the same day, for the occurrence of the second or later abnormal situation, the new target power amount after the slide-up is defined as the demand contract power amount and the new demand contract power amount is determined and rewritten, and the base power amount is newly determined. Then, the demand control is restarted under these conditions.

According to the slide-up control, new demand control can be performed by retreating out of the maximum demand power amount range or the demand contract power range. The function of the slide-up control means is selected by switching when the apparatus is introduced (installed).

[0036]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a block diagram of the apparatus of the embodiment, and FIG. 2 shows a processing flow diagram (main) relating to demand control.

The pulse transmitter (3) included in the observation system (A) detects the current power consumption (instantaneous value) from the transaction wattmeter (1) via the pulse converter (2), and the pulse transmitter (3) described later. A demand pulse signal is sent to the processing system (C).

In the processing system (B), the transmission wave transceiver (4)
, The demand pulse signal is output, and the time signal output is input to the control input unit by synchronizing the demand pulse signal output with the unit time (30 minutes) measurement time and monitoring time relating to the current power consumption (accumulation). In addition, the base power amount, the load capacity, the contract power amount before the demand contract, the demand contract power amount, and the number of loads are separately set and input.

The following sections (control input section (5a), processing operation section (5b)) are monitored while monitoring the current power consumption within the unit time period (specifically, the time differential value of the current power consumption). , Control output section (5c)] to perform arithmetic processing, signal output, or information output.

The processing operation section (5b) sequentially calculates and determines the current power consumption and the predicted power consumption expected to reach at the end of the time period for each sampling cycle within the unit time period based on the control inputs. A target power amount, which is an upper limit index (maximum demand power amount) of power consumption in demand control, is sequentially calculated and corrected, and a new target power amount is automatically determined. In addition, the demand target device (9) including the fixed order [hereinafter, the air conditioner. Are sequentially obtained and reflected in the control output described later.

When the predicted electric energy exceeds the new target electric energy, the rank-dependent equipment start / stop means (51) sequentially stops (normally shuts down) the air conditioners (9) in a fixed order, and Sequential return (restart) based on elapse of stop time in (9)
For this purpose, a signal is output as to whether or not the device needs to be started and stopped. The stop time (interruption mask time) for the normal interruption is 3
For a minute. However, when the limit interruption is performed during the normal interruption, the operation may stop for 3 minutes or more. (In this case, it returns at the same time as the timed update as described later.)

The time-dependent device start / stop means (52) forcibly switches the air conditioner (9) when the predicted power exceeds the demand contract power within a predetermined time (within 3 minutes) immediately before the end of the time period. To completely stop (limit cutoff) and sequentially return (restart) based on the stop time history of each air conditioner (9) after a lapse of a predetermined time (3 minutes of the cutoff mask time) together with the start (update) of the next time limit. In addition, a signal is output as to the necessity of starting and stopping the device.

Here, the history of the stop time means the cutoff time and the order of each of the devices that have undergone the limit cutoff during the normal cutoff and the devices that have received the limit cutoff suddenly. More specifically, the device that has undergone the limit shutdown during the normal shutdown is restored at the same time as updating the time limit, or is restored when three minutes (total) of the shutdown mask time has elapsed. In addition, a device that has suddenly received the limit cutoff sequentially returns at a 1-second pitch from the device that is next to the last-ranked device that was normally cut off in the fixed order.

As described above, the shut-off operation for the air conditioner (9) is performed by the sections [control input section (5a), processing operation section (5b), and control output section (5) of the control processing device (5) [programmable controller]. 5c)], each time output (within each time period), two systems are processed simultaneously from the start of the time period on the time chart, control output is performed at each timing related to the order dependency and time dependency, and the load adjustment (equipment generation) is performed. Stop). Here, the rank-dependent and time-dependent device start / stop means (51, 52) may be considered as function realizing means included in the control processing device (5).

The control output section (5c) sends control information relating to start / stop to the transmission wave transceiver (4) based on output signals from the respective device start / stop means (51, 52).

The processing system excluding the transmission wave transceiver (4) is constituted by a control processing device (5) (programmable controller).

In the transmission command system (C), the control information from the transmission wave transceiver (4) is received by the transmission wave repeater (6), and the power line for the air conditioning equipment is transmitted by the spread spectrum communication system (the means is not shown). A start / stop command for the air conditioner (9) is separately issued through (10), and the air conditioner (9, 9) is transmitted via the transmission wave receiver (7, 7) and the relay (8, 8), respectively. And perform load limit control.

In order to understand the outline of this control operation, FIG.
A virtual graph showing the relationship between the elapsed time within the time limit and the power consumption will help.

FIG. 3A is a graph for explaining the cyclic normal shut-off by the rank-dependent device starting / stopping means.
(B) is a graph explaining the limit interruption by the time-dependent device start / stop means. In the figure, the control mask time (210 seconds) immediately after the start of the time period sets the calculation time for obtaining the ideal power line (new target power amount) together with the time period update. Therefore, when the control mask time (210 seconds) has elapsed, it is a control start point based on the calculated new target power amount. The control mask time is also a control retreat or preparation time for waiting for a return process for the interruption that occurred in the previous unit time period, and the load (equipment) that was interrupted in the previous unit time period may have any time during the return process. Is done.

Here, the ideal power line on the graph is the origin (at the start of the unit time period) with the arrival point (at the end of the unit time period) of the new target power amount at the control start time calculated and determined within the control mask time. It is a straight line from.

The start / stop condition of the device depending on the order (fixed order) is based on the demand monitoring set value (cutoff cycle time set value; for example, 5 seconds), and the current power consumption is determined at fixed time intervals (10 millisecond cycle). As a result of sampling and calculating the rate of increase, it is a point in time when it is determined that the predicted power amount exceeds (is larger than) the target power amount. This device start / stop operation is repeated until the normal cutoff condition is resolved. In addition, monitoring is always performed even during the normal shutdown, and the result is fed back to determine whether new normal shutdown and sequential return are necessary. In addition, since the normal interruption is performed according to the fixed order, the load (equipment) that has been interrupted once will not be interrupted after the return until the order completes unless there is a limit interruption. (Order-dependent device start / stop means)

On the other hand, the start condition of the time-dependent start / stop of the equipment is such that the predicted electric energy exceeds the demand contract electric energy for the remaining three minutes until the end of the time period (27 minutes after the start of the time period until the end of the time period). Immediately, or when the target electric energy is reached, and immediately shuts off the entire device. As a result, 0 kW (power consumption) is maintained until the end of the time period. Then, in accordance with the start of the next time period (time period update), after a predetermined time (interruption mask time) elapses, the apparatus is sequentially returned based on the stop time history of the device.
(Time-dependent device start / stop means)

The variable to be controlled in the present invention is directly the power consumption (actual value) associated with the load adjustment, but the (new) target power is determined as a prerequisite target value. Since the method is particularly important (characteristic), the calculation process (processing operation) will be described. [Figure 1 again
See ]

As described above, the processing operation section (5b) of the control processing device (5) sets the control mask time after the unit time update (start) and before the demand control starts, and within the control mask time, Calculate the predicted power amount with the demand control rate introduced for each sampling period, determine the new target power amount at the end of the control mask time (control start time) while leaving the maximum value, and set the sampling period after the control starts. A new target electric energy in which the target control rate is introduced is calculated for each time, and the target electric power is successively determined by rewriting.

Therefore, when 10 seconds (sampling period) elapses after updating the unit time period, the first new target power amount [= predicted power amount− (predicted power amount−base power amount) ×
Demand control rate] is calculated.

After a lapse of 20 seconds after updating the unit time period, a second new target electric energy is calculated in the same manner. Then, the first new target electric energy is compared with the second new target electric energy, and the larger one is left.

Then, the above calculation process is repeated a total of 21 times until 210 seconds elapse, leaving a new target power amount <maximum value>, which is determined as the new target power amount for the unit time period.

However, if the new target power amount calculated during this time exceeds the demand contract power amount or falls below the base power amount, the new target power amount is determined with 100% of the demand contract power amount. I do.

Next, after a lapse of 210 seconds, a new target power amount [= target power amount + (predicted power amount−
(Target power amount) × target control rate].

Here, if the target control rate is other than zero setting (plus setting), the new target power amount (in other words, the ideal power straight line) is sequentially reduced within the effective power consumption range of 100% or less of the demand contract power amount. It is updated (but only in the increasing direction), and shifts in a direction approximating the predicted power amount. In this case, while following the new target electric energy that is updated successively at each sampling period, the order-dependent normal cutoff and the time-dependent limit cutoff can be used together, so that finer control (improvement of followability) can be achieved. .

Further, as shown in FIG. 4 which shows a processing flow diagram (sub) relating to the slide-up control, the device (X) of the present invention has a function selectable for the evacuation process (slide-up control), and performs a power saving operation. Priority can be given to environmental sustainability.

Here, the slide-up control means (not shown) is included in the processing operation unit (5b), and is used in such a manner that the predicted power amount exceeds the contract power amount due to a large fluctuation in the operation of the power load. The operation is performed when an abnormal situation occurs in which the effective operation time of each demand target device cannot be secured during 24 hours a day.

First, at the time of occurrence of the first abnormal situation, separately from the automatic following of the target power, the predicted power is shifted as the slide power to calculate and determine the new target power.
Evacuate temporarily.

Therefore, if the second or later abnormal situation occurs on the same day, the new target power amount after the slide-up is set as the demand contract power amount, a new demand contract power amount is determined and rewritten, and a new base power amount is newly added. The amount is determined and rewritten, and the demand control is restarted under these conditions.

Accordingly, the demand control based on the new demand contract power is performed by retreating out of the operational maximum demand power range or the demand contract power range.

For example, the apparatus (X) of the present invention is installed in a pachinko parlor or the like.
When installing and installing, if the base power rises due to the replacement of a new unit, if the operation (economic effect) below the demand contract power amount persists, it may adversely affect the environmental maintenance such as the indoor temperature. Also, if the equipment is started and stopped without interruption, there is a concern that the equipment may be damaged in the entire power load. In this case, exceeding (rewriting) the demand contract power,
It is appropriate to conduct new demand control.

[0068]

According to the present invention, the load is adjusted in two stages (system) of a normal cut-off and a limit cut-off (full cut-off) based on a fixed order while updating a unit time limit. Fine demand control can be performed while faithfully following the (new) target power amount (ideal power line) at each unit time and / or sampling period.

Further, by selecting the slide-up control (means), the effect of maintaining the environment can be preferentially applied.

Further, since each processing system is configured to be separable, it is easy to attach it to existing load equipment, and it is extremely useful in that a simple and inexpensive power demand control device can be provided. is there.

As a whole, in a facility into which the apparatus of the present invention is introduced, practically useful economic effects and environmental maintenance effects are exhibited.

[Brief description of the drawings]

FIG. 1 is a block diagram of an apparatus according to an embodiment.

FIG. 2 is a processing flow diagram (main) related to demand control.

FIGS. 3A and 3B are virtual graphs showing the relationship between the time elapsed within a time limit and the amount of power used in demand control, wherein FIG. 3A illustrates normal shutoff and FIG. 3B illustrates limit shutoff.

FIG. 4 is a processing flowchart (sub) relating to slide-up control;

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 Transaction power meter [Observation system] 2 Pulse converter (Pulse detector) [Observation system] 3 Pulse transmitter [Observation system] 4 Transmission wave transceiver [Processing system] 5 Control processor (Programmable controller)
[Processing system] 51 Order dependent device start / stop means [Processing system] 52 Time dependent device start / stop means [Processing system] 5a Control input unit [Processing system] 5b Processing operation unit [Processing system] 5c Control output unit [Processing system] 6 transmission wave repeater [transmission command system] 7 transmission wave receiver [transmission command system] 8 relay [transmission command system] 9 air conditioner (demand control target device) 10 power line for air conditioner A observation system B processing system C transmission command System X power demand controller

[Procedure amendment]

[Submission Date] January 25, 2000 (2000.1.2
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

Claims (7)

[Claims] 1. Within a unit time period (demand time), while continuously monitoring the power consumption (current demand) of all power loads for each sampling period, the demand control target device depends on a fixed order and time lapse. In the improvement of the power demand control device that performs immediate demand control by coordinating the two systems of load adjustment, as an observation system, the current power consumption is detected from the transaction wattmeter via a pulse converter, and the demand is detected. A pulse transmitter for transmitting a pulse signal; a processing system including a transmission wave transceiver for receiving the demand pulse signal and a control processing device, wherein the control processing device is output from the transmission wave transceiver. Demand pulse signal output and timed signal output, the base energy of load equipment that is A control input unit having an input source of a load capacity, a contract power amount before a demand contract, a demand contract power amount, and a load number of a demand control target device, and a sampling period within a unit time period based on each control input. The current power consumption and the predicted power consumption expected to be reached at the end of the time period are sequentially calculated and determined, and the target power consumption, which is the upper limit index (maximum demand power consumption) of the power consumption in demand control, is sequentially calculated and corrected. A processing operation unit that automatically determines a new target power amount, and when the predicted power amount exceeds the new target power amount, sequentially stops the demand control target devices in a preset order, and after a predetermined time. A rank-dependent device start / stop means for sequentially returning, and a demand control target device forcibly when the predicted power amount before the end of the unit time period exceeds the demand contract power amount. Time-dependent device starting and stopping means for completely stopping and sequentially returning after the elapse of a predetermined time together with the start of the next time period, and transmitting control information relating to starting and stopping based on output signals from the respective device starting and stopping means. Control output unit for the transmission command system;
A transmission wave repeater for receiving the control information transmitted from the transmission wave transceiver, and a spread spectrum communication means for transmitting the control information from the transmission wave repeater to the demand control target device via the load power line. An electric power demand control device, comprising: 2. An observation system, a processing system, and a transmission command system are independently installed so as to be separable, and are provided between a pulse transmitter of an observation system and a transmission wave transceiver of a processing system, and a transmission wave transceiver of a processing system. 2. The power demand control device according to claim 1, wherein the transmission wave repeaters of the transmission command system are linked so as to be able to communicate with each other by specific low-power radio. 3. A processing operation unit sets a control mask time before the start of demand control after updating (starting) the unit time period, and within the control mask time, calculates a predicted power amount in which a demand control rate is introduced for each sampling cycle. The new target power at the end of the control mask time (control start time) is determined while leaving the calculated maximum value, and after the control is started, the new target power is calculated by introducing the target control rate for each sampling cycle. 2. The power demand control device according to claim 1, wherein the power demand control device is determined sequentially by rewriting. 4. When the calculated new target power amount exceeds the demand contract power amount or falls below the base power amount, the new target power amount is determined with 100% of the demand contract power amount. The power demand control device according to claim 3. 5. The order dependent device start / stop means performs a cyclic normal cutoff and a sequential return to the demand control target device, so that when the predicted power amount exceeds the new target power amount, the demand control target device is activated. A signal indicating whether or not start / stop is necessary for the sequential stop processing and the sequential return processing based on the elapse of the stop time of each demand control target device. The time dependent device start / stop means stops the demand control target device entirely. In order to shut down and return after updating the time period, when the predicted power amount exceeds the demand contract power amount within a predetermined time immediately before the end of the time period, complete stop processing of the demand control target device and predetermined time with the start of the next time period 2. The power demand control device according to claim 1, wherein after a lapse of time, a signal indicating whether or not start / stop is necessary for a sequential return process based on a stop time history of each demand control target device is output. Place. 6. The processing operation unit in the control processing device according to claim 1, wherein the processing operation unit is configured to:
When an abnormal situation occurs in which the effective operation time of each demand control target device cannot be secured within 24 hours a day such that the predicted electric energy exceeds the contracted electric energy, the target is set at the time of the first abnormal situation. Aside from the automatic following of the electric energy, the predicted electric energy is shifted as a sliding electric energy to calculate and determine a new target electric energy, and a slide-up for retreating out of the maximum demand electric energy range or the demand contract electric energy range. An electric power demand control device comprising control means. 7. The slide-up control means determines a new demand contract power amount using the new target power amount after the slide-up as a demand contract power amount in the event of occurrence of the second or later abnormal situation within 24 hours. And rewriting the base power in a newly determined manner, and restarting the demand control under this condition.
The power demand control device according to the above.