JP4492199B2 - Current control device and control method for indoor power line in apartment house - Google Patents

Current control device and control method for indoor power line in apartment house Download PDF

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JP4492199B2
JP4492199B2 JP2004126963A JP2004126963A JP4492199B2 JP 4492199 B2 JP4492199 B2 JP 4492199B2 JP 2004126963 A JP2004126963 A JP 2004126963A JP 2004126963 A JP2004126963 A JP 2004126963A JP 4492199 B2 JP4492199 B2 JP 4492199B2
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main line
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operation command
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JP2005312210A (en
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健 名井
和幸 小林
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東京電力株式会社
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  The present invention relates to an apparatus and a method for controlling the power load of each house of an apartment house.

  In recent years, electricity has been reconsidered as a clean heat source free of indoor air pollution due to high airtightness and high insulation of houses, all-electric houses have increased due to the spread of hot water water heaters that use nighttime electricity, and further increased demand for power for air conditioning and heating. Initially, power consumption has been increasing year by year. Under such circumstances, the deregulation of power supply has been promoted, and the power supply business has been activated due to the liberalization of power, and the competition for power supply has been intensifying.

  In general homes, it has become common to have multiple electrical appliances such as multiple air conditioners. As a result, more air conditioners have been installed in apartments, and electrified kitchens have begun to spread. The danger of overloading has become apparent. As a means for avoiding overload, it is common to reinforce the power line, but it requires labor and a large amount of money to reinforce the existing trunk line.

  Therefore, as a method to prevent overloading of the trunk line, network electrical devices such as microwave ovens and air conditioners in each home that require relatively power to exceed the upper limit power supply capacity of the home, and before the breaker falls Patent Document 1 discloses a technique for reducing the amount used.

Japanese Patent No. 3402953

  The technology to reduce the upper limit supply power capacity by networking the electrical devices in the home as described above is to use the power just below the contract power upper limit, and it is possible to avoid the problem that the breaker in each home will fall. Since the power load of the entire house is not controlled, there is a problem that the trunk line breaker falls due to an overload of the trunk line to which a plurality of household power lines are connected.

  The present invention has been made in view of such a problem, and in order to estimate the occurrence of power line load in an apartment house and prevent overload, the technology for cooperative control of the air conditioners and electrical appliances of each house One of the purposes is to solve such a problem by cooperatively controlling the electric power load of the house.

  Furthermore, one of the purposes is to control peak power by cooperatively controlling the power load of each house.

In order to achieve the above-described object, the present invention provides a current breaker for an indoor light line in an apartment house, the main line breaker for preventing the overload of the main line, and the current flowing through the main line breaker. Current acquisition means for acquiring current, current storage means for sequentially storing the current value flowing through the main line breaker acquired by the current acquisition means, a branch lamp line that branches from the main line and supplies power to each house, and the main line by the current acquisition means and the value of the current flowing through the breaker, the main line in the near future and load change rate of the current flowing through the main line breaker determined by the difference between the stored current value to the current value and the current storing means, by a few minutes 1 minute The main current prediction means for predicting the current value, the communication means for transmitting the operation command to the electrical equipment of each house connected to the branch lamp line, the controller for controlling, and the controller And at least one electric device that receives the operation command, and the controller transmits at least one operation command corresponding to the predicted current value from the main line current prediction unit to each electric device using the communication unit, Each electric device adjusts the current flowing through the main line based on the operation command.

The present invention relates to a current control device for an indoor lamp line in an apartment house, the main line breaker which is at the base of the lamp line and prevents an overload of the main line, a current acquisition means for acquiring a current flowing through the main line breaker, and a current acquisition means Current storage means that sequentially stores the current value flowing through the main line breaker acquired by the branch, a branch lamp line that branches from the main line and supplies power to each house, the current value that flows through the main line breaker by the current acquisition means, and the current value A main line current predicting means for predicting the current value of the main line in the near future of several minutes to one minute ahead by the load change rate of the current flowing through the main line breaker determined by the difference from the current value stored in the current storage means ; Communication means for transmitting an operation command to the electrical equipment of each house connected to the branch lamp line, a controller for controlling the control, and at least one for receiving the operation command transmitted by the controller And when the predicted current value from the main line current predicting means exceeds the first rated current value, the controller transmits a first power saving operation command to the electrical equipment of each house using the communication means. The first operation mode for reducing the power peak is performed by adjusting the current value to be lowered according to the operation command received by each electric device and the current operation state.

  Further, in the current control device for an indoor lamp line in an apartment house according to the present invention, the controller may be configured such that the predicted current value from the main line current predicting means exceeds the first rated current value and further exceeds the second rated current value. The second power saving operation command is transmitted to the electric device of each house using the communication means, and the electric device performs the operation stop that is the second operation mode according to the received operation command to reduce the power peak. .

  Furthermore, in the current control device for an indoor lamp line in an apartment house according to the present invention, the controller has a current value from the current acquisition means that is smaller than the second rated current value and is lower than the first rated current value. Until the second power saving command for setting the electric device in the second operation mode is maintained, the current value decreases from the first rated current value less than the second rated current, and becomes a current value lower than the first rated current value. The first power saving command for setting the electric device in the first operation mode is maintained, and a current control release command is transmitted when the current value is lower than the first rated current value.

  Furthermore, in the current control device for an indoor lamp line in an apartment house according to the present invention, the first rated current value is a current value lower than the current at which the main line breaker operates, and the second rated current value is the first rated current. If the current exceeds the value and the current further increases, the current value is such that the main line breaker operates.

The present invention relates to a current control method for an indoor lamp line in an apartment house, a current acquisition step for acquiring a current flowing in a main line breaker that is the source of the lamp line and prevents an overload of the main line, and a main line acquired by the current acquisition step A current storage process that sequentially stores a current value flowing through the breaker, a current value that flows through the main line breaker in the current acquisition process, and a current that flows through the main circuit breaker determined by the difference between the current value and the current value stored in the current storage process The current load change rate and the main current prediction process for predicting the current value of the main line in the near future, which is several minutes to one minute ahead , and for each house connected to the branch light line that branches from the main line and supplies power to each house An operation command transmission step in which the controller transmits an operation command to the electric device, and an operation command reception step in which at least one electric device receives the operation command. A feature is that at least one stage of operation command corresponding to the predicted current value acquired in the line current prediction step is transmitted to the electric device in the operation command transmission step, and each electric device adjusts the current flowing through the main line based on the operation command. To do.

  According to the present invention, it is possible to control peak power by cooperatively controlling the power load between the doors. Furthermore, in an existing apartment house, it is possible to promote electrification at an appropriate cost without increasing the electrical facilities in the case of a new apartment house while avoiding trunk line reinforcement work.

  Hereinafter, embodiments of the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

  FIG. 1 is an overall configuration diagram showing the entire current control device of the apartment house 14 in the first embodiment. The electric power supplied from the outdoor lamp line through the high voltage electric wire of 6 kV is stepped down to 200V, 100V, or only 100V by the transformer 11, and is divided into main lines having a plurality of main line breakers 12 (hereinafter referred to as MCB). It is supplied to each door (A1-C3) by the branched branch light line. The main line current control indicator 13 (hereinafter referred to as IB controller) acquires the current value flowing through the MCB 12, stores the acquired current value in the memory, calculates the moving average value, and uses the algorithm described later for about one minute ahead. The current value of the trunk line is predicted, and a control command for each electric device with a door power control function is transmitted as a power line carrier signal.

  FIG. 2 is a block diagram showing the configuration related to the current control device for each door in the first embodiment. Each door 20 measures a current of each door and transmits a current measurement transmitter 26 having a function of transmitting the current to the IB controller 13, a gateway 21 that converts the control command into an internal conversion function, a distribution board 22, and an energy saving voice. A generator 23 and a home appliance / residential equipment (housing equipment) 25 connected via a soft switch box 24 are provided. Further, the energy saving voice generator 23 displays a message and gives a warning by voice by a display and a speaker (not shown).

  Each door 20 measures the current value of each door 20 with a current measuring transmitter 26 provided on the branch lamp line, and preferably transmits it to the IB controller 13. By this process, the IB controller 13 can identify which branch power line is effective for transmitting the message with respect to the current value of the MCB 12. As shown in the embodiment, the control can be suitably performed even without the control.

  FIG. 3 is a flowchart showing the flow of processing of the current control device in the first embodiment, FIG. 4 is a schematic diagram showing transition of processing of the current control device in the first embodiment, and FIG. FIG. 5 is a schematic diagram showing a condition for detecting a load rate variation of a current in the present embodiment by paying attention not only to an absolute value but also to a change rate. In the first embodiment, an algorithm combining a main line load factor% (DR) and a load change rate% / min (DIR) is realized. This will be described below with reference to FIGS.

  In FIG. 3, when the process starts, constants are set first (step S11). Here, the setting of the trunk line load factor% (DR) with respect to the interrupting rated current that shifts to the prediction calculation, the trunk voltage prediction load factor% (DE) for transmitting each control signal, the load change rate% / minute (DIR), and The relationship of control commands sent to each house is preset by a change rate multiplier (MDR).

  In FIG. 5, the vertical axis represents the load factor and the horizontal axis represents the time. The main line load factor% (DR) has changed greatly from 16:00 to 20:00 in the evening due to an increase in electric light load due to sunset and dinner time. Therefore, although the change rate multiplier (MDR) is normally set to “1”, it is set to “2” in the evening by a calendar and a timer (not shown), and “0” when DIR is negative. In addition, since the control command from the IB controller 13 is output as a message by the energy saving voice generator 23, the control command for the electric device will be described as a message type corresponding to the control command.

  When step S11 for setting the constant is completed, the MCB normal monitoring mode is set, the current flowing through the MCB 12 is measured (step S12), and stored in the memory of the IB controller 13. Next, the use current value of each house connected to each branch lamp line is received and stored in the memory of the IB controller 13 (step S13). The IB controller 13 obtains the value of the maximum current value (Imax) of each house for the past 5 minutes and stores it in the memory (step S14).

  Next, it is measured at intervals of 1 minute whether the main line load factor% (DR) is a high load of 80% or more (step S15).

  If the load is lower than 80% and the normal state can be determined as in the process transition shown in FIG. 4, an M0 message indicating “cancel energy-saving mode” is output to all units (step S16), and then the MCB normal monitoring is continued. I do.

  If it is detected that the load is 80% or higher, the load change rate% / min (calculated by the moving average process for 10 minutes) is calculated from the load factor calculated five minutes ago and the current load factor. DIR) is acquired (step S17). In this embodiment, the 10-minute moving average process is used to average short-cycle load fluctuations such as a dryer, but in addition to this, an arithmetic average such as an exponential average or a convolution calculation using a digital filter may be used. good.

Next, the trunk line voltage predicted load factor% (DE) is calculated by the following formula 1 from the above result.
DE = DR + DIR * DMR (Formula 1)
Based on the obtained trunk voltage predicted load factor% (DE), the current value of the trunk line that is several minutes to one minute ahead is predicted, and the message type is set (step S18).

The message type setting process will be described with reference to FIG. The upper diagram shows the message transition when the current rises, and the process of skipping the step when the current suddenly rises is indicated by a broken line. Further, the lower diagram shows the transition of the message when the current drops, and the process of continuing the same control until the normal state is similarly indicated by a broken line. In the message type setting (step S18) in FIG.
(1) When DR exceeds 80% (when the 0th rated current is exceeded), the normal state is shifted to the main line current prediction mode (warning mode: S17).
(2) When the predicted trunk line current DE increases and exceeds 85% (when the first rated current is exceeded), the M1 message “request for energy conservation cooperation” is output and the M1 mode is set.
(3) When DE further rises and exceeds 90% (when the second rated current is exceeded), the M2 message "Air conditioning temperature control execution" is output, and the set temperature of the air conditioner or the like is changed while the M2 mode is set.
(4) If DE still rises and exceeds 95% (when the third rated current is exceeded), the M3 message “target device OFF” is output to turn off the predetermined countermeasure device and switch to the M3 mode. .
(5) It should be noted that if the message transitions (2), (3), and (4) above have a steep increase in the trunk line current, they may be skipped to the upper mode without going through each stage.
(6) When the main current falls, if such control is maintained and the current becomes normal, an M0 message for canceling the current control is output, and the electrical equipment in each house is returned to the state before the control.

  Next, in step S19 of FIG. 3, when the same message and the transition of the message are M3 → M2, M3 → M1, M2 → M1, “null (blank)” is set in the message and “no message” ". Furthermore, if the maximum current value (Imax) for the past 5 minutes exceeds 50% of the contract current at each house, the message is received and controlled, and if it is less than 50%, the control message is ignored. The electric equipment is not controlled (step S20). Next, a correspondence message is transmitted to the selected door (step S21), the process returns to the beginning, and the repetition process is executed.

  In addition, the set value shown in the first embodiment is an example, and changes depending on the value of the current flowing through the trunk line of the housing complex, the branching state of the power line, the electrical equipment of each door to be a load, and the power consumption. It may be changed to four steps, three steps, or two steps.

  FIG. 6 is an in-door configuration diagram showing a configuration related to the current control device of each door 30 in the second embodiment. As for message transition and selection of a household to be controlled, there are a method for giving intelligence to the IB controller 13 and a method for giving intelligence to each door side. In the second embodiment, the gateway 31 selects a method. It is. The lamp transport signal transmitted by the IB controller 13 is received by the gateway 31 installed in each door 30 (A1 to C3), converted into a control command by an internal conversion function, and passed through the distribution board 32 in the door. Then, it is transmitted to the energy saving message generator 33 and the soft switch box 34. The energy saving message generator 33 utters a message regarding “energy saving” and “status” according to the control signal. The soft switch box 34 holds the operating state of the home appliance / household equipment 35. For example, in the case of an air conditioner, the soft switch box 34 outputs a control command to the air conditioner for normal operation, energy saving operation, set air conditioning temperature change and stop.

  FIG. 7 is an in-door configuration diagram showing the configuration of the current control device for each door in the third embodiment. A third embodiment will be described in which the indoor distribution board has a function of a peak cut distribution board instead of the soft switch box 34 in the second embodiment. The distribution board 32 includes branch breakers 38 and 39. The gateway 31 shuts off the branch breakers 38 and 39 according to a predetermined priority in accordance with a control command from the IB controller 13, and is connected to an air conditioner, home appliance, The power supply to the heat storage apparatus etc. which are the housing equipment 35 and 37 is interrupted | blocked, and the process which reduces peak electric power is performed. Further, the energy saving message generator 33 utters a message regarding “energy saving” and “status” according to the control signal, and calls attention by the message before the branch breakers 38 and 39 are shut off.

  As described above, the present invention relates to a technique and technology for cooperatively controlling the power load of an apartment house. Specifically, (1) a method for estimating the power line load generation of an apartment house, and (2) to prevent overload. , A method for cooperatively controlling the air conditioner and electrical appliances of each door, and (3) a device for realizing (1) and (2), and controlling the power load between the doors to control peak power It is possible to suppress. In the above-described three embodiments, the set numerical value is an example, and is appropriately set according to the apartment house to be adapted, and current control is performed to promote electrification and prevent interruption without losing comfort. Needless to say.

It is a whole lineblock diagram showing the whole current control device of an apartment house in a 1st embodiment. It is a door block diagram which shows the structure regarding the current control apparatus of each door in 1st Embodiment. It is a flowchart which shows the flow of a process of the current control apparatus in 1st Embodiment. It is a schematic diagram which shows the transition of the process of the current control apparatus in 1st Embodiment. It is a schematic diagram which shows the conditions which detect the load factor fluctuation | variation of the electric current in this embodiment paying attention not only to an absolute value but a change rate. It is a door block diagram which shows the structure of the current control apparatus of each door in 2nd Embodiment. It is a door block diagram which shows the structure of the current control apparatus of each door in 3rd Embodiment.

Explanation of symbols

  11 Transformer, 12 Main circuit breaker, 12 Trunk breaker, 13 Trunk current control indicator, 14 Apartment house, 20, 30 doors, 21, 31 Gateway, 26 Current measuring transmitter, 22, 32 Distribution board, 23, 33 Energy-saving sound generator, 24, 34, 36 Soft switch box, 25, 35, 36, 37 Home appliance / household equipment, 38, 39 Branch breaker.

Claims (6)

  1. In the current control device for indoor electric wires in apartment buildings,
    A main circuit breaker that is located under the power line and prevents overloading of the main line,
    Current acquisition means for acquiring the current flowing through the main circuit breaker;
    Current storage means for sequentially storing the current value flowing through the main line breaker acquired by the current acquisition means;
    A branch light line that branches from the main line and supplies power to each house;
    Depending on the current value flowing through the main line breaker by the current acquisition means, and the load change rate of the current flowing through the main line breaker determined by the difference between the current value and the current value stored in the current storage means, a few minutes to one minute ahead Main current prediction means for predicting the current value of the main line in the near future ,
    A communication means for transmitting an operation command to the electrical equipment of each house connected to the branch light line;
    A controller that controls the control,
    At least one electrical device that receives an operation command transmitted by the controller;
    With
    The controller transmits at least one stage operation command corresponding to the predicted current value from the main line current prediction unit to each electric device using the communication unit, and each electric device adjusts the current flowing through the main line based on the operation command. A current control device for an indoor lamp line in an apartment house.
  2. In the current control device for indoor electric wires in apartment buildings,
    A main circuit breaker that is located under the power line and prevents overloading of the main line,
    Current acquisition means for acquiring the current flowing through the main circuit breaker;
    Current storage means for sequentially storing the current value flowing through the main line breaker acquired by the current acquisition means;
    A branch light line that branches from the main line and supplies power to each house;
    Depending on the current value flowing through the main line breaker by the current acquisition means, and the load change rate of the current flowing through the main line breaker determined by the difference between the current value and the current value stored in the current storage means, a few minutes to one minute ahead Main current prediction means for predicting the current value of the main line in the near future ,
    A communication means for transmitting an operation command to the electrical equipment of each house connected to the branch light line;
    A controller that controls the control,
    At least one electrical device that receives an operation command transmitted by the controller;
    With
    When the predicted current value from the main line current predicting means exceeds the first rated current value, the controller transmits the first power saving operation command to the electrical equipment of each house using the communication means, and each electrical equipment receives A current control device for an indoor lamp line in an apartment house, characterized in that a first operation mode for reducing an electric power peak is performed by adjusting the current value according to an operation command and a current operation status.
  3. In the current control device for an indoor lamp line in an apartment house according to claim 2,
    When the predicted current value from the main line current prediction means exceeds the first rated current value and further exceeds the second rated current value, the controller sends a second power saving operation command to the electrical equipment of each house using the communication means. An electric current control device for an indoor lamp line in an apartment house, wherein the electric device transmits and the electric device performs an operation stop that is a second operation mode according to the received operation command to reduce an electric power peak.
  4. In the current control device of the indoor lamp line in the apartment house according to claim 2 or 3,
    The controller
    Maintaining the second power-saving command to set the electric device in the second operation mode until the current value from the current acquisition means decreases from the second rated current value and becomes a current value lower than the first rated current value;
    Maintaining the first power-saving command to set the electric device in the first operation mode until the current value decreases from the first rated current value less than the second rated current and becomes a current value lower than the first rated current value,
    A current control device for an indoor lamp line in an apartment house, wherein a current control release command is transmitted when each current value is lower than a first rated current value.
  5. In the current control apparatus of the indoor lamp wire in the apartment house of any one of Claim 2 to 4,
    The first rated current value is a current value lower than the current at which the main line breaker operates,
    The second rated current value exceeds the first rated current value, and is a current value at which a main breaker is activated when the current further increases.
  6. In the current control method of the indoor power line in the apartment house,
    A current acquisition step for acquiring a current flowing through a main breaker that is under the power line and prevents an overload of the main line,
    A current storage step of sequentially storing the current value flowing through the main line breaker acquired by the current acquisition step;
    The load change rate of the current flowing through the main breaker determined by the difference between the current value flowing through the main line breaker by the current acquisition step and the current value stored in the current storage step and the current value stored in the current storage step is several minutes to one minute ahead A main line current prediction process for predicting a main line current value in the near future ;
    An operation command transmission step in which the controller transmits an operation command to the electrical equipment of each door that is branched from the main line and connected to the branch lamp line that supplies power to each door;
    An operation command receiving step in which at least one electric device receives the operation command; and
    With
    The controller transmits at least one stage of operation command corresponding to the predicted current value acquired in the main line current prediction step to the electric device in the operation command transmission step, and each electric device adjusts the current flowing through the main line based on the operation command. A method for controlling the current of an indoor lamp line in an apartment house.
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JP4799531B2 (en) * 2007-11-14 2011-10-26 三菱電機株式会社 Apartment house power distribution system, apartment house power distribution method, apartment house power distribution management device
WO2011162405A1 (en) 2010-06-25 2011-12-29 シャープ株式会社 Electricity management system that operates a plurality of electrical devices efficiently; computer program, recording medium containing said program, electrical device, and central management apparatus for said electricity management system; and method for managing electrical devices in a central management apparatus
JP2013102610A (en) * 2011-11-08 2013-05-23 Nippon Telegr & Teleph Corp <Ntt> Wide-area power failure prevention method and wide-area power failure prevention system
JP2013115885A (en) * 2011-11-28 2013-06-10 Hochiki Corp Power demand control system and method, and power supply outlet device
JP5590618B2 (en) * 2011-12-12 2014-09-17 オムロンオートモーティブエレクトロニクス株式会社 Power supply control apparatus and method, and power management system
JP5496246B2 (en) * 2012-04-18 2014-05-21 株式会社正興電機製作所 Power storage control system and power storage control method
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