JP2001197661A - Power saving and control apparatus and energy saving system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain a total energy saving system for power consumption. SOLUTION: This power-saving control apparatus, in which a demand control apparatus is connected to a pulse detector connected to a current transformer of an electrical power company, performs schedule company and peak-cut control of power consumption by connecting, to the demand control apparatus, a power-saving control panel comprising a relay timer panel which is preset to execute the sequential control through time difference control with regard to air-conditioning facilities, freezing facilities, prime mover facilities and lighting facilities. Thereby, the power consumption and contract power can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to reduce the contract power and power consumption of a large store or the like by controlling the maximum power consumption that varies depending on the season or time zone to a predetermined value or less. The present invention relates to a control device and an energy saving system.

[0002]

2. Description of the Related Art When a power customer installs a substation and receives power supply, a power supply contract is made between the power company and the customer based on power supply agreements, and the contract power is determined based on the contract. That is being done. That is, the contract power refers to a contract value of power supply between the power company and the power consumer.

[0003] The meter used for monitoring the contract power is the maximum demand wattmeter, and the measurement time limit is specified as 30 minutes in the electricity supply agreement. I have.

[0004] Further, the demand power (demand) means an average power for 30 minutes specified by the electricity supply agreement.
The maximum value for one month is called maximum demand power (maximum demand).

[0005] A so-called actual value contract is applied to a power consumer whose contract power is less than 500 kW, and the contract power of the month is calculated based on the past one including the month measured by the maximum demand power meter.
It is automatically determined as the maximum demand power (maximum demand) for the year.

[0006] Therefore, a power consumer having a contract power of less than 500 kW must make sure that the demand does not exceed the contract power, and can reduce the contract power by controlling the monthly maximum demand. As the price goes down, it is possible to save electricity bills accordingly.

[0007] When the value of the maximum demand wattmeter becomes 500 KW or more, the customer and the electric power company can use the load equipment and the power receiving equipment to be used, the load factor and the operation rate of the same industry as a reference. The contract power will be determined after consultation.

[0008]

At present, large stores such as supermarkets, specialty stores, department stores and the like often have a contract power of 500 KW or more, and it is important for such consumers to reduce the electricity bill. Is an issue,
Demand control is required to reduce the electricity bill.

The conventional demand control device used for this purpose monitors the average power consumption for 30 minutes, and predicts the power consumption at the end of the time period while calculating the power consumption at the end of the time period so as not to exceed the contract power. There is an alarm output and load control of two circuits capable of real quantity control or eight circuits capable of responding to seasonal and hourly loads.

FIG. 14 shows an example of this demand control device.
Is connected to a current transformer of a power company, a pulse detector used as a maximum demand power meter, a demand control device is connected to the pulse detector, a three-stage alarm output contact connection terminal and an eight-stage The control output contact connection terminal is controlled.

The control objects are mainly air conditioner equipment, refrigeration equipment, prime mover equipment, and lighting equipment.
N or OFF, and when the used power reaches the maximum power, the air conditioner equipment, refrigeration equipment, prime mover equipment or lighting equipment are turned off collectively to control the load and reduce the demand power to the contract power or less. Is to be maintained.

Therefore, according to such a conventional demand control device, the control area of the lighting equipment cannot be controlled on the store layout according to the functional characteristics of the store, and therefore, it is important in the store or the like. There has been a problem that the required illuminance of the illumination, which is an element, cannot be secured.

[0013] Control of the lighting and the air conditioner having a relatively small element specific gravity at the same time should be avoided from the viewpoint of dealing with customers at the sales floor and efficient and safe workplaces.

In a conventional store or the like, there is a function of performing demand control or schedule control as a single control for controlling the load of the air conditioning equipment, but has the following disadvantages.

1) In the conventional demand control, as described above, load control is performed by turning on or off the lighting equipment at a time when the maximum power is reached, so that the required illuminance cannot be secured in a large store or the like. There is a risk.

2) Conventionally, there was a function of controlling the schedule of the work light and the business light. However, when the maximum electric power is reached, the operation when the entire business is turned on is performed collectively and is not systematic. Can not.

3) According to the conventional demand control device, when the maximum power is reached, it is possible to control the lighting and non-lighting by the load control, but it is necessary for the work except for the backyard facility and the kitchen. A wide range of measures, such as securing peak illuminance and peak cutting of lighting equipment in backyard facilities, is not yet possible.

In the peak cut of the air conditioner at the maximum power, the air conditioner is simply turned on or off. Therefore, when the air conditioner is stopped, the air conditioner is completely stopped, the air blowing function is not operated, and therefore, the room air is not circulated, and the temperature difference between the floor surface and the ceiling surface in the room becomes extremely large.

In a conventional large store or the like, there is a function of performing demand control or schedule control as a single control for controlling the load of the air conditioning equipment, but has the following disadvantages.

1) The conventional demand control device is a control for turning off or on the air conditioner equipment when the maximum power is reached, and the order control by the time difference control cannot be performed.

2) The OFF / ON control at the time of maximum power is ranked according to the store layout. That is, it is not possible to systematically control the layout of the store of the air conditioner equipment that uses the cold air leak of the refrigeration equipment around the wall surface of the refrigeration equipment, the center of the refrigeration equipment island, clothing of non-refrigeration equipment, miscellaneous goods, and the like.

3) The air conditioner is turned off at the same time as the maximum power is reached for demand control at the time of maximum power, and a simultaneous control over stop by the systematic step control and a time difference by the timed relay are installed, so that the recovery operation can be performed. There is no system that prevents the maximum power from being exceeded by simultaneous activation due to transients.

4) In order to simply perform demand control at the time of maximum electric power, when the maximum electric power is reached, system control of systematic time differences ranked so as not to hinder store operations cannot be performed. At the same time, the refrigeration equipment or the lighting equipment reaches the maximum power value and is controlled and turned off.

Therefore, when the air conditioner equipment is restarted, the cooling heat circulation and overheating by the lighting equipment and the supercooling by the refrigeration equipment, on the contrary, cause a loss of cooling heat and wasteful power consumption, so that efficient power saving is achieved. Various problems have occurred, such as the inability to perform the operation.

The present invention has been made in view of the above circumstances, and has been made to further improve the situation. Control of air conditioning equipment, control of refrigeration equipment,
Providing a power saving control device and an energy saving system that enable automatic system control that can reduce power consumption and contract power by performing schedule control and peak cut control by prioritizing control of motor equipment and control of lighting equipment. It is intended to do so.

[0026]

According to the present invention, an energy saving system is comprehensively controlled for air conditioning equipment, refrigeration equipment, motor equipment and lighting equipment, and the power consumption of each equipment is controlled by schedule control and pick cut control. ,
It succeeded in reducing the contract power and the metered power, and solved the conventional problems.

That is, one of the present inventions relates to a power saving control device comprising a demand control device connected to a pulse detector connected to a current transformer of an electric power company. A power saving control panel comprising a relay panel set to perform order control by time difference control is connected to the demand control device to reduce power consumption and contract power by performing power consumption schedule control and peak cut control. A power saving control device characterized in that the power saving control device performs

According to another aspect of the present invention, in the power saving control apparatus according to the first aspect of the present invention, in the power saving control relating to the lighting equipment, the lighting of the preparation lamp is set by a timer, and the presence of the absence sensor and the forgetting to turn off are prevented by a human sensor. The power saving control device is characterized by performing daylighting, turning off the daylight use location by the illuminance sensor, and turning off the backyard lighting at the peak power consumption.

Next, another aspect of the present invention relates to the power saving control device according to the first aspect, wherein the power saving control for the air conditioning equipment sequentially turns on the air conditioning compressor as the power consumption increases from the target value of the contract power.
Performing air conditioning control to secure the contract power value to FF, and controlling the defrost dispersion of the refrigeration equipment using a contact point of a demand control device when predicting the contract power over by the air conditioning control; and A power saving control device characterized in that backyard lighting is controlled by using a contact of a demand control device when an overage of contract power is predicted by air conditioning control and refrigeration equipment control.

Still another aspect of the present invention relates to the power saving control device according to claim 1, wherein the power saving control relating to the refrigeration equipment includes reducing the contracted power by defrost dispersion of the refrigeration equipment, and sequentially turning off the defrosting coils during the peak power consumption. A power saving control device characterized in that a defrosting coil is sequentially turned on when the power is reduced, and a timed relay is controlled so that power consumption does not protrude.

In another aspect of the present invention, the power saving control by the prime mover equipment includes reducing the demand target value by dispersing the defrost of refrigeration and refrigeration, and sequentially turning on the defrost coil at the peak power time.
The power consumption is reduced by FF, and then the defrost coils are sequentially turned on to control by a timed relay so that the power consumption does not protrude.

Next, according to the invention of the system, in order to save energy by connecting a demand control device to a pulse detector connected to a current transformer of a power company, order control is performed on the power consumption device by time difference control. An energy saving system characterized by connecting the energy saving control device set to the low voltage side and performing schedule control and peak cut control of the power consumption of the power consuming device, thereby reducing contract power and metered power. Yes, the power consuming device is an air-conditioning device, a motor device, a refrigeration device, and a lighting device.

According to another aspect of the present invention, the energy saving by the air-conditioning equipment in the power consuming apparatus is performed by performing a timed operation control on a demand target value calculated and set by a timer systematically, and every time the power consumption increases. Turn off air conditioning compressors sequentially
When the power consumption is reduced, the air-conditioning compressor is sequentially turned on and controlled by a timed relay so that the power consumption does not protrude. In the control, when it is predicted that the demand target value will be exceeded by the air conditioning control, the power plant equipment is controlled to sequentially turn off the chilled / hot water / water supply / drainage / pumping pumps to secure the target value, thereby reducing power consumption. When it comes, the prime mover equipment is sequentially turned on to control by a timed relay so that power consumption does not protrude.

Still another invention is to reduce the demand target value by defrost dispersion of freezing and refrigeration when the demand target value is predicted to be exceeded by the motor equipment.
When the power consumption is reduced by sequentially turning off the defrost coils at the peak power, the defrost coils are sequentially turned on.
N is controlled by a timed relay so that power consumption does not protrude. Energy saving by the lighting equipment in the power consuming device can be done by setting the lighting of the preparation and closing lights by a timer, and by using a human sensor when there is no presence In addition to preventing lighting and forgetting to turn off, the illuminance sensor and automatic light control device turn off or reduce the illuminance at the daylight use point to reduce power consumption and turn off the backyard lighting to the specified illuminance at the peak power consumption. The backyard lighting is turned on when the power consumption is reduced.

[0035]

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioning system, a refrigeration system,
Comprehensive energy saving system for prime mover equipment and lighting equipment.Reduced power consumption and contracted power by performing schedule control and peak cut control of power consumption by adding timer control to conventionally known demand control. Power saving control device and energy saving system.

The introduction of the energy saving system of the present invention
For example, this is performed as follows. Regarding the embodiment of the energy saving system of the present invention, although it depends on the type of building, the number of power consumption facilities, the capacity, etc., various stores, schools, cultural facilities, meeting places, government buildings, hospitals, welfare facilities, nursing homes, commercial facilities, Any type of office or hotel can be used, and the setting is almost as shown in the flow of FIG.

That is, for the measurement of the power value, the design drawing,
Examination of various facilities, on-site surveys, interviews on usage, energy saving systems, creation of programs, creation of reduction figures, notification to the power company, installation, installation of the power company's pulse detector, and determination of contract power .

According to the present invention, calculation is performed according to the following procedure.
Implement by designing and equipping.

First, on-site survey of the building to be installed, study of substation facilities, power factor and load factor (power factor 100%, contract fee 15% discount, load factor is reduced by consolidating low-load transformers to prevent loss. ), And measure the voltage, current, and power of the light and power, and grasp the usage status by measuring the receiving point and terminal,
Investigate the types and capacities of electrical and mechanical equipment and
Investigate the discrepancy between load capacity design and performance and monitor and control system. Next, we investigate the business hours and holidays, conduct a study on the control method based on the installed capacity, load, and operating temperature for each room, passage, entrance, etc. Consider the control method based on the illuminance situation.

Next, a floor plan is investigated, and a control range is set based on the floor plan of the building such as air conditioning, lighting, ventilation, and use. In addition, for the study of the design drawings, the capacity of electric lights and power equipment was investigated and examined, the capacity distribution of electric lights and power equipment, and the load coefficient per area were investigated.
Investigate and study the monthly maximum power value, study the energy saving method and numerical value based on the annual and monthly maximum power value, and then investigate and study the layout of the building and the person using it, and examine the surplus of each design numerical value I do. In this way, the lighting equipment method is investigated and examined, and the control method is examined based on the existing lighting equipment. Therefore, by investigating and examining the appropriate illuminance, the control of the appropriate illuminance of each room and the external light distribution area is examined. Investigation and examination of office equipment, computer, kitchen equipment, POS cash register, and addition of capacity of each load equipment and minimum voltage,
Consider whether high-demanding equipment can be targeted for energy saving by bypass. Investigation and examination of the heat source method, equipment capacity, and system of the air conditioner, and whether the heat source of the air conditioner is electric or gas, load capacity of each room with fresh air, human body, and light source, and control system, as described above, Investigate and examine the equal-efficiency equipment system, and investigate and examine whether the air conditioner and the prime mover have the appropriate number of revolutions for the required capacity, and whether or not the inverter is a high-efficiency inverter system. Investigate the energy saving values based on the ventilation frequency of each room and the outside air introduction method, examine the control of the water supply and drainage system, equipment capacity, and the amount of water used in the water supply and drainage system, and investigate and examine the method of the cold / hot water pump, water supply and drainage pump, and the Calculate the energy saving numerical value by comparing and studying the capacity and operating temperature, and comparing and studying the capacity of the water supply and drainage pump equipment and the amount of water used

Investigation and examination of the capacity of large-sized freezers and refrigerators and the defrost schedule were conducted to investigate whether the refrigerating machine equipment was an electromagnetic valve or a digital system, and to investigate the equipment capacity of refrigerating machine equipment and the required capacity of freezing and refrigerators. A system study for each gas contract based on the controllable numerical value to a low cost form based on the usage amount will be conducted.

The voltage, current, and power of the lamp and power are measured for 24 hours and one week, and the control of the voltage, current, and power of the lamp and power, and the control based on the maximum value are examined.

Next, the building situation, priority frequency, customer use yard, staff use yard, use time zone and use rate, and use contents (temperature zone / illuminance coefficient) will be examined.

Further, at the time of design, the equipment capacity is set based on various design criteria by counting the specifications based on the purpose of the building, the purpose of use, the scale, the frequency of use, etc., and adding future layout changes. It counts all plus.

For example, if the maximum demand is 500 kW or more, a penalty occurs if the contracted power is exceeded, so that the maximum demand is set and managed by lowering the contracted power by about 15 to 20%. Due to this.

As described above, the main energy used in a building is electricity, and the electricity consumption ratio depends on the building use and scale, but generally ranges from 25% to 35% of lighting equipment and 35% of air conditioning equipment.
~ 40%, 40 ~ 25% of the motor equipment. Therefore, it is not effective to use energy saving equipment for only some of the equipment.
It is clear that the effect is increased by implementing the entire building, and the present invention employs this system.

[0047]

Embodiment 1 An embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a state in which a power saving control panel according to the present invention is connected to an existing power receiving and transforming facility. In FIG. 1, a power receiving and transforming facility is a facility for receiving or transforming power installed by a customer such as a store as a private facility, and generally receives power supplied and transmitted at 6.6 KV or extra high voltage of 22.33 KV. It has a function of transforming to a low voltage according to the power load equipment by a transformer.

The main circuit of such a power receiving and transforming facility will be described with reference to FIG. 1. A high voltage 6.6 KV piezoelectric path supplied from a power company is connected to a transformer PCT via a high-voltage drop cable head CH. Be drawn in. In the instrument transformer PCT, a high voltage and a current are transformed to a low voltage in order to integrate the amount of electricity used in the high voltage circuit by the integrating power meter WH connected thereto.

On the other hand, a pulse detector used as a maximum demand power meter is connected to the current transformer CT of the electric power company, and a demand control DMC is connected to this pulse detector.

The instrument transformer PCT is connected to a high-pressure vacuum disconnector VCB via a disconnector DS. Disconnector D
S is a switchgear used for the purpose of completely disconnecting it from the circuit at the time of maintenance of a transformer, a circuit breaker or the like. The high-pressure vacuum disconnector VCB always opens and closes the high-voltage path, detects a fault current such as an overcurrent, a short path, or a ground fault, and automatically shuts off the circuit.

The high-pressure vacuum disconnector VCB is connected to each load switch LB
Through S, single-phase transformer Trlφ3W and three-phase transformer Tr3φ
3W, via the current transformer CT and the circuit breaker MCCB, to each distribution board NFB via the power saving control devices C1 to C3 according to the present invention, and the single-phase transformer Trlφ3W side is lighting equipment etc. , A three-phase transformer Tr3φ3W
The power is transmitted to the three-phase load side such as refrigeration equipment and air conditioning equipment.

In the configuration described above, as shown in FIG. 2, the pulse detector is connected to the current transformer CT of the electric power company provided in the existing power receiving and transforming equipment, and the demand connected to the pulse detector is connected. A power saving control panel according to the present invention is connected to the control device DMC, which comprises a lighting equipment control device C1, an air conditioning equipment control device C2, and a refrigeration equipment control device C3 provided with a relay panel, thereby consuming. Control such as power schedule control and peak cut control is performed.

The lighting equipment control device C1, shown in FIG.
The explanations 1) to 8) shown in the frames of the air-conditioning equipment control device C2 and the refrigeration equipment control device C3 briefly describe the respective controls, and will be described in detail in the description of the control devices C1 to C3 described later. I do.

In the above-mentioned power receiving and transforming equipment, as shown in the current flow diagram of FIG. 3, in a normal state, the disconnector DS is turned on, the high-pressure vacuum disconnector VCB is turned on, and each load switch LBS is turned on. Is turned ON, and each switchboard MCCB
Are turned on, and power is supplied by turning on each distribution board NFB.

[0055]

Embodiment 2 The general function of an embodiment of the present invention will be described with reference to FIG. In the lighting of the present invention, the preparation lamp is turned on by schedule control. Turn on the air conditioner 30 minutes before starting work. When working, the lights are controlled, and the backyard is controlled by sensors.

Usually, in the business hours, the order of the air-conditioning equipment, the prime mover equipment, and the refrigeration equipment is set, and three times of the demand measurement time are set.
Stopping is performed for several minutes in 0 minutes, and systematic operation within the demand target value is performed, and accordingly, the management accuracy of the demand target of the volume control is improved.

Next, at the time of a power peak, the air conditioning equipment, the prime mover equipment, and the refrigeration equipment are sequentially turned off.
When the demand target value is exceeded even by the control of the prime mover equipment, the defrost coil of the refrigeration equipment is turned off, and the required illuminance of the backyard lighting is further ensured and turned off.
As described above, when the power consumption falls to the demand target value, the backyard lighting is sequentially turned on, the defrost coil of the refrigeration equipment is turned on, and the air conditioning compressor and the like are turned on.
N, and such control is continued by predicting that the demand target value will be exceeded.

As shown in FIG. 10, the total power saving effect of the power saving control of the lighting equipment, the power saving control of the air conditioning equipment, and the power saving control of the refrigeration equipment, as shown in FIG. It has been confirmed that it can be reduced.

[0059]

[Embodiment 3] The configurations and functions of a lighting equipment control device C1, an air conditioning equipment control device C2, and a refrigeration equipment control device C3 of the present invention will be sequentially described.

An embodiment of the lighting equipment control apparatus C1 (schedule control and peak cut control of the lighting equipment) of the present invention will be described.

In FIG. 4 showing the structure of the lighting equipment control device C1, in a large store or the like, SW1 is a switch for a preparation light / business light, and T1 is a timer for the preparation light (7:00 to 2).
2:00), SW2 is a preparation light forced switch, and T2 is a commercial light timer (10:00 to 2).
SW3 is a forced switch for business lights, SW4 is a switch for backyard motion sensor, and T3 is a timer for backyard motion sensor (set at 7:00 to 22:00). ), SW5 is a forced switch for the backyard motion sensor, DMC is a demand control contact (H), R is a remote control relay, SW6 is a motion sensor forced switch, and SW7 is an illuminance sensor. Force switch, T4
Reference numeral denotes an illuminance sensor timer (set at 10:00 to 21:00), SW8 is an illuminance sensor timer forcible switch, and SW9 is an illuminance sensor forcible switch.

According to such a lighting equipment control device C1, as shown in the lighting control flow chart shown in FIG. 5, when the switch SW1 for the ready light / business light is turned on, the timer T1 for the ready light turns on at 7:00. Between 22:00 and 22:00, the preparation light is turned on. By turning on the preparation light forcible switch SW2, the preparation light can be turned on as necessary, and it is possible to cope with abnormality of the timer and the sensor.

Then, by the timer T2 for the commercial light,
All business lights are turned on between 10:00 and 21:00. However, by turning on the commercial lamp forcible switch SW3, the commercial lamp can be forcibly turned on as necessary.

When the switch SW4 for the backyard motion sensor is turned on, the motion sensor is activated from 7:00 to 22:00 by the timer T3 for the backyard motion sensor, and the backyard (for employees) is activated. Break room,
Lights in lockers, toilets, etc.) are turned on when people enter or exit, and automatically turned off when no one is present. The backyard illumination can be turned on as necessary by the backyard motion sensor forcible switch SW5, and it is possible to deal with abnormalities of the timer and the sensor.

Further, at the time of power peak, the back yard lighting of each room passage except the kitchen is secured to about 20 lux necessary for work by the demand control contact DMC (H circuit), and the others are turned off. By the peak cut control, a demand target value that is 5 to 10% lower than the predicted maximum power can be secured.

When the switch SW7 is turned on, the timer T4 for the illuminance sensor detects the time from 10:00 to 21:00.
The illuminance sensor is activated to turn on or off the external light at the loading / unloading entrance or under the eaves according to the set illuminance. The illuminance sensor forcible switch SW9 can be used to turn on an external light, such as a loading / unloading entrance or under an eave, as necessary.

The following effects can be obtained by the lighting equipment control device C1 as described above.

1) During the work preparation time before and after opening and closing of the store, the preparation lamp can be set to light freely by the preparation lamp timer T1.

2) During the business hours, the business light is automatically turned on by the business light timer T2, and when the store is closed, only the preparation light is used, so that wasteful power can be saved.

3) With the motion sensor, it is possible to prevent the user from turning off the light or forgetting to turn off the light when the user is absent, thereby reducing unnecessary power consumption. Switch SW for backyard motion sensor
4 prevents double or triple forgetting to erase.

4) By providing an illuminance sensor at a predetermined location, the location where external light can be used is turned off, whereby the power can be reduced and the timer T4 for the illuminance sensor can be used.
Thus, forgetting to turn off at night can be prevented, power can be reduced, and energy can be saved.

5) At the time of a power peak, the contact H in the demand control contact DMC secures about 20 lux necessary for work in each room passage of the back yard except for the kitchen, and turns off the others to provide a predicted maximum. 5-1 of electric power
The demand target value reduced by about 0% can be kept.

6) When the ready lamp timer T1 is abnormal,
When the forcible switch for ready light SW2 and the timer for commercial light T2 are abnormal, it is possible to respond with the forcible switch for commercial light SW3.

7) When the motion sensor is abnormal, the backyard motion sensor forced switch SW5 and the motion sensor forced switch SW6 can cope with the abnormality.

8) When the illuminance sensor or the illuminance sensor timer T4 is abnormal, it can be handled by the illuminance sensor timer forcible switch SW8 and the illuminance sensor forcible switch SW9.

9) The power saving control of the lighting equipment is not simply a load control of the lighting but a collective method for each circuit, but a schedule control, a function control, and a peak cut control are performed for the lighting of each room, passage, store, backyard and the like. Maintenance can be automatically controlled.

It has been confirmed that, as shown in FIG. 11, the power consumption before the power saving can be reduced by 23 kW after the power saving due to the power saving effect by the power saving control of the lighting equipment.

[0078]

Embodiment 4 An embodiment of an air conditioner control apparatus C2 (schedule control and peak cut control of an air conditioner) of the present invention will be described with reference to FIGS. The air conditioning equipment control device C2
In FIG. 6 showing the configuration of A, a relay A, Bt, Ct,
Dt, Et, Ft, Gt and Ht are timed relays.

In the above, A, B, C, D, E, F,
G and H are respective contacts of the demand control device.

A to g are relay contacts on the makeup side.
Is an A relay contact (make), b is a B relay contact (make), c is a C relay contact (make), d is a D relay contact (make), e is an E relay contact (make), and f is an F relay contact (make). Make), g are G relay contacts (make), and make-side relay contacts a to g are OFF when a normal voltage is applied.
When it becomes FF, each relay is turned off and relay contacts a to g are ON
State.

A 'to g' are back side relay contacts, a 'is an A relay contact (back), b' is a B relay contact (back), c 'is a C relay contact (back), d'
Is a D relay contact (back), e 'is an E relay contact (back), f' is an F relay contact (back), g 'is a G relay contact (back), and the back side relay contacts a' to g 'are usually When the demand control contacts A to H are turned on, the relays are connected, and the relay contacts a ′ to g ′ are turned off.

According to the air equipment control device C2, as shown in the air-conditioning control flow chart shown in FIG. 7, when the demand forecast value reaches the target value, the demand control contact A becomes O.
It becomes FF and A relay is cut off. Further, when the power consumption increases by 1 W in 30-minute units, the demand control contact B
Is shut off, and then the timed relay Bt is shut off. Hereinafter, each time the power consumption increases and the predicted demand value reaches the target value, the demand control contacts C to F are shut off.

Further, even in such an air-conditioning control, when the power is over, the defrosting coil of the refrigeration equipment is shut off by turning off the demand control contact G. Also, when the power is over due to the control of the refrigeration equipment, the illumination of the backyard is shut off by the OFF operation of the demand control contact H.

With the above control, the power consumption is suppressed to the contract power. When the power consumption decreases after the power peak, the switch is turned on from the contact H, and when the demand value is not reached even when the contact H is turned on, the contact is switched on. When G enters and the power consumption does not reach the demand value, the contacts F to A in the following order.
Enters.

As a result, as shown in the flowchart of FIG. 7, schedule control based on the time difference control of automatic and continuous air conditioning can be performed by the contacts A to H.

Here, a specific example in which the power peak cut of the air conditioning equipment is ranked according to the store layout is as follows. First, around the wall surface of the food refrigeration case (A and B circuits), and second, Island and center of refrigerated case (C
Circuit, D circuit), and thirdly, when the peak cut order of the air conditioning equipment is set, such as clothing in non-refrigerated cases and miscellaneous goods (E circuit, F circuit), and when the power consumption reaches the demand target value. ON / OFF by the following time difference control
OFF control.

(1) Circuit A 10 minutes operation 5 minutes stop (compressor stopped, blower operation) 10 minutes operation (2) Circuit B 10 minutes operation 5 minutes stop (compressor stopped, blower operation) 10 minutes operation ( 3) C circuit 15 minutes operation 5 minutes stop (compressor stops, blower operation) 5 minutes operation (4) D circuit 15 minutes operation 5 minutes stop (compressor stops, blower operation) 5 minutes operation (5) E circuit 20 minutes operation 5 minutes stop (compressor stops, blower operation) (6) F circuit 20 minutes operation 15 minutes stop (compressor stops, blower operation) In addition, when power consumption reaches demand target value, relay of A circuit If the contacts are cut off and the power consumption stops even at 1 W, the circuit moves to the B circuit. If the power consumption increases, the circuit moves to the C circuit by a timed relay, and then turns off the air conditioning compressor from the D circuit to the F circuit in order. Secures the demand target value by operating the blower .

When the demand target value can be secured by such air conditioning control, the automatic control operation can be continuously performed in the order of the circuit A to the circuit F or vice versa.

The following effects can be obtained by the air conditioning equipment control device C2 as described above.

1) As the power consumption increases from the contract power target value, the O
The contract power value is secured by intermittent motions that repeat FF to ON, but by continuing the operation of the blower, the indoor air is circulated and becomes in a state close to the air conditioning operation.

2) On the floor where clothes and miscellaneous goods are handled,
For example, the air conditioner is turned on at 8 o'clock, and all floors of the store are turned on at 9 o'clock.
It is possible to save power by adjusting the seasonal cooling start timing by schedule control, such as turning on at 1:30.

3) The peak power cut of the air conditioner can be ranked according to the store layout, and the automatic control operation can be continuously performed.

4) When the peak cut control of the air conditioner is adapted to the store layout, it is possible to reduce the maximum power consumption in midsummer when the power consumption is the largest in the year by utilizing the cold air leakage of the refrigeration case. Therefore, contract power and power consumption can be reduced, and the power saving effect is increased.

5) By performing the peak cut control of the air conditioning equipment by setting a time difference for each circuit, when the maximum power value reaches the demand target value, the circuit-by-circuit number management control according to the store layout and ON by the time difference. -By the OFF control, control over can be prevented beforehand, and smooth power saving can be performed by the automatic control most suitable for the maximum power.

6) Conversely, when the maximum power value clears the demand target value, the demand control contact can be automatically restored and operated with a time lag in the reverse order. By setting (1), it is possible to prevent a transient overcurrent at the time of startup and automatically control power saving without exceeding a demand target value.

It has been confirmed that, as shown in FIG. 12, the power consumption before the power saving can be reduced by 146 kW after the power saving as shown in FIG.

[0097]

Fifth Embodiment A refrigeration equipment control device C3 (defrost dispersion schedule control and peak cut control of the refrigeration equipment) will be described with reference to FIG.

In FIG. 8 showing the configuration of the refrigeration equipment control device C3, DMT is a defrost timer, DMC is a demand control device, GL is a defrost lamp, 52H is a defrost electromagnetic contactor, 21T is a defrost return solenoid coil, and DPH is Heater, BH heater, 23C
Is a thermostat for temperature control in the warehouse, 21C is a liquid solenoid valve, 2W2 is a delay timer, 52C1 is a magnetic contactor for a compressor,
52C2 is a magnetic contactor for a compressor.

According to such a refrigeration equipment control apparatus C3, as shown in the refrigeration equipment control flow chart shown in FIG. 9, 1) when the demand target value of the contracted power still exceeds the demand target value of the air conditioner even after the peak cut control. Disperse the defrost for each refrigerated case. Further, the defrost coil is turned on every four hours. When the demand control does not stop at the peak cut by the air conditioning but exceeds, the defrosting coils of the respective refrigeration cases are sequentially turned off to make the power consumption less than the demand value. Below, when there is no possibility of over,
Turn on the defrosting coil sequentially.

2) When turning on the defrosting coils, the defrosting coils of each refrigeration case are sequentially turned on by a timed relay. This is performed to prevent the power from protruding when they are simultaneously turned on.

The following effects can be obtained by the refrigeration equipment control device C3 as described above.

1) The operating time of the defrosting coil of the refrigeration facility is distributed from the peak power consumption time period by the distributed schedule control, so that the maximum power value can be kept low and the basic contract power can be reduced.

2) When the maximum electric power reaches the demand target value even by the power saving control of the air conditioning equipment, the defrosting time of the refrigeration case is controlled by the refrigeration equipment to sequentially turn on the defrosting coil.
F can be kept below the demand target value.

3) In a situation where there is no possibility that the demand target value will be exceeded, the defrosting coils are sequentially turned on.

Further, by starting the automatic recovery after four hours, it is possible to prevent the maximum power from being exceeded during the power peak time period.

As shown in FIG. 13, it has been confirmed that the power consumption before the power saving can be reduced by 5 KW after the power saving, due to the power saving effect by the refrigeration equipment control as described above.

[0107]

According to the power saving control device and the energy saving system of the present invention, a demand control device is connected to a pulse detector connected to a current transformer of a power company, and the demand control device is connected to an air conditioner, a refrigeration plant, and a prime mover plant. By connecting a power-saving control panel equipped with a timer relay panel set to perform order control by time difference control with respect to lighting equipment and performing schedule control and peak cut control of power consumption, power consumption and contract power can be reduced. There is an effect that can be reduced.

Further, according to the power saving control device and the energy saving system of the present invention, since the demand target value of the maximum power is automatically kept, the schedule function in the lighting equipment and the peak cut control, and the schedule function in the air conditioning equipment and the peak cut time are used. Control, defrost dispersion schedule control in refrigeration equipment, and various control devices such as peak cut control. In addition to this, there is an effect that efficient and significant power saving can be achieved in a state where there is no hindrance to the business in accordance with the diversification of other items to be transported such as large stores.

[Brief description of the drawings]

FIG. 1 is a circuit diagram in which an embodiment of a power saving control device of the present invention is connected to existing power receiving and transforming equipment.

FIG. 2 is an overall flowchart of the power saving control device.

FIG. 3 is a power saving control flowchart.

FIG. 4 is a circuit diagram of an embodiment of lighting equipment control.

FIG. 5 is a flowchart of an embodiment of power saving control of the lighting equipment.

FIG. 6 is a circuit diagram of an embodiment of power saving control of the air conditioner.

FIG. 7 is a flowchart of an embodiment of power saving control of the air conditioner.

FIG. 8 is a circuit diagram of an embodiment of the power saving control of the refrigeration equipment.

FIG. 9 is a flowchart of an embodiment of power saving control of the refrigeration facility.

FIG. 10 is a graph comparing a power saving state by a power saving control device with a conventional example.

FIG. 11 is a graph comparing a power saving situation by a lighting equipment control device and a conventional example.

FIG. 12 is a graph comparing the power saving state by the air conditioner control device with the conventional example.

FIG. 13 is a graph comparing a power saving situation by the refrigeration equipment control device with a conventional example.

FIG. 14 is a block diagram of an embodiment of the energy saving system.

FIG. 15 is a flowchart for explaining a conventional control device.

[Explanation of symbols]

 C1 Lighting equipment control device C2 Air conditioning equipment control device C3 Refrigeration equipment control device CT Current transformer DMC Demand control PCT Instrument transformer WH Integrated power meter DS Disconnector VCB High-pressure vacuum disconnector LBS Load switch Trlφ3W Single-phase transformer Tr3φ3W 3 Phase transformer CT Current transformer NFB Distribution board MCCB Circuit breaker for main wiring

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 25, 2000 (2009.2)
5)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0087

[Correction method] Change

[Correction contents]

(1) Circuit A 10 minutes operation 5 minutes stop (compressor stopped, blower operation) 10 minutes operation (2) Circuit B 10 minutes operation 5 minutes stop (compressor stopped, blower operation) 10 minutes operation ( 3) C circuit 15 minutes operation 5 minutes stop (compressor stops, blower operation) 5 minutes operation (4) D circuit 15 minutes operation 5 minutes stop (compressor stops, blower operation) 5 minutes operation (5) E circuit 20 minutes operation 5 minutes stop (compressor stops, blower operation) (6) F circuit 20 minutes operation 5 minutes stop (compressor stops, blower operation) Also, when power consumption reaches the demand target value, relay of circuit A If the contacts are cut off and the power consumption stops even at 1 W, the circuit moves to the B circuit. If the power consumption increases, the circuit moves to the C circuit by a timed relay, and then turns off the air conditioning compressor from the D circuit to the F circuit in order. Secures the demand target value by operating the blower

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0095

[Correction method] Change

[Correction contents]

[0095] 6) When the maximum power value to the contrary is clear the demand target value, while over time difference demand control contact in reverse order can continue to carriage return operation automatically, at the time of operation of such air-conditioning equipment By setting the time difference, it is possible to prevent a transient overcurrent at the time of startup and automatically control power saving without exceeding the demand target value.

Claims (11)

[Claims] 1. A power saving control device comprising a pulse detector connected to a current transformer of an electric power company and a demand control device connected thereto, wherein order control is performed by time difference control on air conditioning equipment, refrigeration equipment, prime mover equipment and lighting equipment. A power saving control panel including a relay / timer panel set to be performed is connected to the demand control device to perform power consumption schedule control and peak cut control, thereby reducing power consumption and contract power. A power saving control device characterized by the following. 2. The air-conditioning system according to claim 1, wherein the air-conditioning control is performed by sequentially turning off the air-conditioning compressor as the power consumption increases from a target value of the contract power to secure the contract power value. The control of the defrost dispersion of the refrigeration equipment when the power over is predicted by using the contact point of the demand control device, and the prediction of the contract power over by the air conditioning control and the refrigeration equipment control require the demand for the backyard lighting. The power saving control device according to claim 1, wherein the control is performed using a contact point of the control device. 3. The power saving control relating to the refrigeration equipment includes reducing contract power by defrost distribution of the refrigeration equipment, and sequentially turning off the defrost coil at a peak power time and sequentially turning on the defrost coil when the power consumption decreases. The power saving control device according to claim 1, wherein the control is performed by a timed relay so that power consumption does not protrude. 4. The power saving control by the prime mover equipment includes reducing the demand target value by dispersing the defrosting of refrigeration and refrigeration, sequentially reducing the power consumption by turning off the defrost coil at the peak power, and sequentially turning on the defrost coil. 2. The power saving control device according to claim 1, wherein the control is performed by a timed relay so that power consumption does not protrude. 5. The power saving control for the lighting equipment includes: setting the lighting of the preparation light by a timer; preventing the absence of light and preventing forgetting to turn off by using a human sensor; and turning off the daylight use location by using the illuminance sensor. 2. The power saving control device according to claim 1, wherein the backyard lighting is turned off at the time of peak power consumption. 6. An energy saving control set to perform order control by time difference control of a power consuming device in order to save energy by connecting a demand control device to a pulse detector connected to a current transformer of an electric power company. An energy saving system characterized by connecting a device to a low voltage side and performing schedule control and peak cut control of power consumption of the power consuming device to reduce contract power and metered power. 7. The energy saving system according to claim 6, wherein the power consuming device is an air conditioner, a motor, a refrigeration facility, and a lighting facility. 8. The energy saving by the air-conditioning equipment in the power consuming device is performed by systematically controlling the operation of a demand target value calculated and set by a timer, and then controlling the air-conditioning compressor every time the power consumption increases. A control for sequentially turning OFF and securing a target value is performed, and when the power consumption is reduced, the air-conditioning compressor is sequentially turned ON and controlled by a timed relay so that the power consumption does not protrude. Item 8. The energy saving system according to item 6 or 7. 9. The schedule control of the power consumption is performed when the demand target value is predicted to be exceeded by the air conditioning control.
The motor is controlled to keep the target value by sequentially turning off the cold / hot water / water supply / drainage / pumping pumps, which are the prime mover facilities, and when the power consumption is reduced, the prime mover facilities are sequentially turned on and the power consumption rises 7. The energy saving system according to claim 6, wherein the control is performed by a timed relay so as not to be performed. 10. When the demand target value is predicted to be exceeded by the prime mover equipment, the demand target value is reduced by refrigeration / refrigeration defrost dispersion, and the power consumption is reduced by sequentially turning off the defrost coils at peak power. 8. The energy saving system according to claim 6, wherein when the power is turned on, the defrost coil is sequentially turned on to control the power consumption so that power consumption does not protrude. 11. The energy saving by the lighting equipment in the power consuming device is performed by setting the lighting of the preparation and closing lights by a timer, preventing the absence of lights and forgetting to turn off by using a human sensor, the illuminance sensor and the automatic illuminance sensor. Turn off or reduce the illuminance of the daylight use location by using a dimmer to reduce power consumption, turn off the backyard lighting to a predetermined illuminance during peak power consumption, and turn on the backyard lighting when the power consumption decreases. 8. The method according to claim 6, wherein:
Energy saving system as described.