JP4628074B2 - Electricity consumption equipment and cogeneration system - Google Patents

Description

The present invention includes a power consuming facility provided with power generation means for supplying power to the power consuming device at a power consuming portion where the power consuming device connected to the commercial system is provided, and the power consuming facility. Related to cogeneration system.

  Such a power consuming facility is installed in a power consuming place such as a general home where the power consuming device is provided, and is configured to supply the power generated by the power generation means to the power consuming device. As the power generation means, for example, a cogeneration device that outputs electric power and heat is provided. The cogeneration device may be configured with a generator and an engine that drives the generator, or may be configured with a fuel cell.

The power generation means is preferably operated at a relatively high output because, for example, the efficiency decreases when the power generation means is operated at a low output. On the other hand, the power consumption of the power consuming device fluctuates.
Therefore, in such a power consumption facility, conventionally, a power storage means for storing surplus power of the power generation means is provided in the middle of a power supply line that supplies power to the power consumption equipment from the power generation means, so that the power consumption of the power consumption equipment is generated. The power stored in the power storage means is supplied to the power consuming device through the feeder line when the power generated by the means is exceeded (see, for example, Patent Document 1).

JP 2002-48005 A

  However, since the surplus power of the power generation means is stored by one power storage means, it is necessary to provide a power storage means having a large power storage capacity. Such a power storage means having a large power storage capacity is large and Due to the high price, the power consumption equipment was large and expensive.

  The present invention has been made in view of such circumstances, and the object thereof is to reduce the size and cost of the power generation means while storing surplus power of the power generation means and allowing the stored power to be consumed by a power consuming device. It is an object of the present invention to provide a power consumption facility and a cogeneration system.

The power consuming equipment of the present invention is provided with power generation means for supplying power to the power consuming device at a power consuming location where the power consuming device connected to the commercial system is provided,
In the first characteristic configuration, the power consuming device is provided with power storage means for storing power consumed by itself, and charge / discharge control means for controlling charge / discharge with respect to the power storage means,
Management means for controlling the operation of the charge / discharge control means is provided so as to charge the power storage means with surplus power of the power generation means,
The charge / discharge control means of each of the plurality of power consuming equipment as the power consuming equipment is configured to communicate the chargeable power amount of the power storage means to the management means,
The management means detects the surplus power amount of the power generation means detected by the surplus power detection means, the chargeable power amount communicated from the charge / discharge control means of each of the plurality of power consuming devices, and preset setting selection conditions Based on the power storage means, the one that charges the surplus power of the power generation means is selected from the power storage means of the plurality of power consuming devices, and a charge command is commanded to the charge / discharge control means corresponding to the selected power storage means Configured as
The charge / discharge control means is configured to execute a charge operation when a charge command is commanded from the management means, and to execute a discharge operation when the charge command is not commanded,
The setting selection condition is to select, from among the plurality of power storage means, the power storage means whose chargeable power amount is equal to or less than the surplus power amount of the power generation means detected by the surplus power detection means. , The condition is set to repeat until there is no more power storage means with a chargeable power amount equal to or less than the surplus power amount of the power generation means detected by the surplus power detection means,
In the state where the management means is instructing the charging command, when the surplus power detecting means detects that there is no surplus power, among the power storage means instructing the charging command at that time from, in order from the charging and discharging control unit of the smallest the accumulator unit is charged electric energy, characterized in that it is configured to stop the command for the charging command.

That is, the power consuming device is provided with power storage means for storing the power consumed by itself and charge / discharge control means for controlling charging / discharging of the power storage means.
Then, the operation of the charge / discharge control means is controlled by the management means so as to charge the power storage means with the surplus power of the power generation means, so that the surplus power of the power generation means is stored in the power storage means, and thus stored in the power storage means. The power that is being consumed is consumed by the power consuming device when, for example, the power consumption of the power consuming device exceeds the power generated by the power generating device or while the power generating device is stopped.

  In other words, since a plurality of power consuming devices are usually provided in a power consuming part such as a general household, a plurality of power consumptions of all or part of the plurality of power consuming devices provided in the power consuming part are used. Each device can be provided with power storage means so as to store the power consumed by itself.

Therefore, since it is not necessary to provide a large and expensive power storage means in the power consuming equipment, it is possible to reduce the size and cost of the power consuming equipment.
Moreover, since the power consuming device provided with the power storage means is supplied with power from the power storage means even if a power failure occurs during its operation, it can be used normally even during a power failure.
In short, in addition to being able to store the surplus power of the power generation means and consuming the stored power in the power consuming device, it is possible to reduce the size and cost of the power consuming device. It is now possible to provide power consumption equipment that can be operated.

Further, according to the first characteristic configuration of the power consuming equipment , the management unit detects the surplus power amount of the power generation unit detected by the surplus power detection unit, and the charge communicated from the charge / discharge control unit of each of the plurality of power consuming devices. Based on the available power amount and preset setting selection conditions, one that stores the surplus power of the power generation means is selected from the power storage means of the plurality of power consuming devices, and the charge corresponding to the selected power storage means is selected. A charge command is commanded to the discharge control means.
The charge / discharge control means executes the charge operation when a charge command is instructed from the management means, and executes the discharge operation when the charge command is not instructed, so that surplus power of the power generation means is stored in the power storage means, Thus, the power stored in the power storage means is consumed by the power consuming device when the charge command is not commanded.

As the setting selection condition, the selection of and the largest storage means below the excess power amount of the power generator for charging electric energy is detected by the surplus electric power detecting means from among the multiple power storage means, the surplus power detection the excess power amount less chargeable electric energy of the power storage unit of the power generator detected by means to set the conditions repeated until no.

  By setting the above-described conditions as the setting selection conditions, it is possible to store the surplus power of the power generation means in the power storage means so that the charge amount does not exceed the surplus power.

Incidentally, such a power consumption facility is usually provided in a state linked to a commercial system, but if the amount of charge to the power storage means exceeds the surplus power of the power generation means, the commercial power is consumed unnecessarily. As a result, energy costs increase.
Therefore, the surplus power of the power generation means can be stored and consumed while avoiding an increase in energy cost due to unnecessary consumption of commercial power.

The second characteristic configuration of the power consuming installation, in addition to the first Japanese Cho構formed,
The power generation means is configured to generate AC power;
A power feed line that feeds power from the power generation means to the power consuming device is connected to a commercial system,
The power consuming device includes a DC power supply unit that converts supplied AC power into DC power, and is configured to consume DC power converted by the DC power supply unit.
The power storage means is configured to store DC power converted by the DC power supply unit.

That is, since the power supply line that feeds power from the power generation means to the commercial system is connected to the commercial system, when the power generated by the power generation means is insufficient with respect to the power consumed by the power consumption equipment, the shortage Is supplied from a commercial system.
The power consuming device includes a DC power supply unit that converts AC power supplied thereto into DC power, and is configured to consume the DC power converted by the DC power supply unit. AC power or AC power from a commercial system is converted to DC by a DC power supply unit and consumed by a power consuming device.
Further, since the power storage means is provided so as to store the DC power converted by the DC power supply unit, surplus power of the power generation means is converted to DC power by the DC power supply unit, and the DC power is stored. The means is charged.

By the way, when a DC power supply unit is not provided in the power consuming device, the AC / DC converter that converts the supplied AC power to DC power and the DC power converted by the AC / DC converter are converted into AC. It is necessary to provide an orthogonal transform unit that converts the power to the power storage means between the AC / DC transform unit and the orthogonal transform unit, which complicates the configuration and causes a rise.
On the other hand, by providing the power storage means as described above for the power consuming device provided with the DC power supply unit, the orthogonal transform unit is unnecessary, and the configuration can be simplified and the cost can be reduced. It becomes possible.
Therefore, when the power consuming equipment is provided in a state connected to a commercial system, the present invention can be implemented while reducing the cost.

Cogeneration system of the present invention, there is provided with a power consumption equipment of the first or second characteristic feature,
The power generation means is constituted by a cogeneration device that generates heat and electric power,
Hot water storage means for storing hot water in a hot water storage tank with heat generated by the combined heat and power supply device, and an electric heater for converting supplied electric power into heat stored in the hot water storage tank are provided,
When the surplus power of the combined heat and power supply device is larger than the power that can be charged in the power storage means, operation control means is provided for supplying the remaining surplus power charged in the power storage means to the electric heater. And

That is, the electric power generated from the combined heat and power device is consumed by the power consuming device, and is stored in the hot water storage tank by the heat generated from the combined heat and power device by the hot water storage means.
The surplus power of the power generation means is stored in the power storage means provided in the power consumption device, and the power stored in the power storage means is, for example, when the power consumption of the power consumption device exceeds the power generation power of the power generation means Or, it is consumed by the power consuming device while the power generation means is stopped.
When the surplus power of the combined heat and power supply apparatus is larger than the power that can be charged in the power storage means, the remaining surplus power charged in the power storage means is converted into heat stored in the hot water storage tank by the electric heater.

  In other words, since a plurality of power consuming devices are usually provided in a power consuming part such as a general household, a plurality of power consumptions of all or part of the plurality of power consuming devices provided in the power consuming part are used. Each device can be provided with power storage means so as to store the power consumed by itself.

Therefore, since it is not necessary to provide a large and expensive power storage means in the cogeneration system, it is possible to reduce the size and cost of the cogeneration system.
Moreover, since the power consuming device provided with the power storage means is supplied with power from the power storage means even if a power failure occurs during its operation, it can be used normally even during a power failure.
Further, when the surplus power of the combined heat and power supply device is larger than the power that can be charged in the power storage means, the remaining surplus power charged in the power storage means is converted by the electric heater into heat stored in the hot water storage tank. It becomes possible to operate the co-feeding device at a sufficiently high output with high efficiency.
In short, in addition to being able to store the surplus power of the power generation means and consuming the stored power in the power consuming device, it is possible to reduce the size and cost of the power consuming device. It is now possible to provide a drivable cogeneration system.

[ Reference Embodiment]
Hereinafter, a reference embodiment of the present invention will be described based on the drawings.
Based on FIG. 1, the cogeneration system provided with the power consumption equipment PS will be described.
This cogeneration system is provided in a power consumption location such as a general household where a plurality of power consuming devices 1 are provided, and is a combined heat and power supply that generates heat and power as power generation means for supplying power to the plurality of power consuming devices 1 The electric power consuming equipment PS provided with the device 2, the hot water storage unit WU for storing hot water in the hot water storage tank 3 and supplying the heat medium to the heating terminal 4 using heat generated in the combined heat and power supply device 2, and a cogeneration system It is comprised from the driving | operation control part 5 etc. which control driving | operation of this. In the present embodiment, the cogeneration apparatus 2 includes a generator 2g and a gas engine 2e that drives the generator 2g, and is configured to generate AC power.

Gas fuel is supplied to the gas engine 2e at a set flow rate (for example, 0.433 m ³ / h), so that the combined heat and power supply device 2 is rated, and in the rated operation, the thermoelectric The generated power of the cogeneration device 2 is substantially constant at the rated generated power (for example, 1 kW).

The power consumption equipment PS will be further described.
The power consuming equipment PS includes an inverter 6 for grid connection, a storage battery 7 (an example of a power storage means) provided in each of a plurality of power consuming devices 1 of the plurality of power consuming devices 1, and charging / discharging. A control unit 8 (corresponding to charge / discharge control means), a management unit 9 (corresponding to management means) for controlling the operation of the charge / discharge control unit 8 so as to charge the storage battery with surplus power of the cogeneration apparatus 2; And the electric heater 10 etc. which convert the supplied electric power into the heat stored in the said hot water storage tank 3 are comprised.

The storage battery 7 is provided in each power consuming device 1 so as to store power consumed by itself, and the charge / discharge control unit 8 is configured to control charge / discharge of the storage battery 7.
In the reference embodiment, the management unit 9 is configured using the operation control unit 5.
The electric heater 10 is provided so as to heat the cooling water of the gas engine 2e flowing through a cooling water circulation path 34 described later.

In the following description, among the plurality of power consuming devices 1 provided at the power consuming locations, those provided with the storage battery 7 are referred to as rechargeable devices 1A and 1B, and those without the storage battery 7 are provided. It may be described as a non-rechargeable device 1C.
Further, the rechargeable devices 1A and 1B include a device 1A that is operated while continuously consuming electric power (hereinafter may be referred to as a continuously energized rechargeable device 1A), a charging state and power. There is a device 1B (hereinafter referred to as a charge-switchable rechargeable device 1B) that can be switched to an operation state that consumes a battery.
The continuous energization type rechargeable device 1A and the charge switching type rechargeable device 1B each include a DC power supply unit 11 that converts supplied AC power into DC power. It is configured to consume the converted DC power.
In each of the continuous energization type rechargeable device 1 </ b> A and the charge switching type rechargeable device 1 </ b> B, the storage battery 7 is configured to store the DC power converted by the DC power supply unit 11. Yes.

  Further, the charge switching type rechargeable device 1B is provided with a charge intermittent switch 12 for intermittently supplying power to itself, and charging / discharging control means 8 switches the charge intermittent switch 12 to ON state for charging. The switchable rechargeable device 1B is switched to the charged state, and the charge switching control unit 8 switches the charge on / off switch 19 to the OFF state so that the charge switchable rechargeable device 1B is switched to the operating state. It is configured.

  Incidentally, the continuously energized rechargeable device 1A includes a gas stove, a VTR, a heating toilet seat, etc., and the rechargeable rechargeable device 1B includes a charger for a rechargeable device such as a mobile phone, Includes rechargeable vacuum cleaners. In the VTR, the DC power supply unit 11 is provided so as to cover power for holding a reserved time such as a recording time.

  Each of the continuous energization type rechargeable device 1A, the charge switching type rechargeable device 1B and the non-rechargeable device 1C may be provided in one or a plurality. In the embodiment, although not shown, a plurality of units are provided.

  A commercial system 13 is connected to a distribution board 14 for connecting the plurality of power consuming devices 1 provided at the power consumption location by a commercial line 15 and supplies power output from the combined heat and power supply device 2 An electric wire 16 is connected to the distribution board 14. That is, the feeder line 16 that feeds power from the cogeneration device 2 to the power consuming device 1 is linked to the commercial system 13.

The inverter 6 is configured so that the output power of the generator 2 g is set to the same voltage and the same frequency as the power supplied from the commercial system 13 in the middle of the feeder line 16.
The commercial system 13 is, for example, a single-phase three-wire system 100 / 200V.

The commercial line 15 is provided with a current sensor 17 for detecting a current flowing through the commercial line 15, and the current sensor 17 detects whether or not a reverse power flow occurs in the current flowing through the commercial line 15. It is configured.
That is, in this reference embodiment, the surplus power detecting means D for detecting surplus power of the combined heat and power supply device 2 is constituted by the current sensor 17.
The electric heater 10 is connected to the output side of the inverter 6 in the feeder line 16 by a heater distribution line 18, and the electric power supplied to the electric heater 10 can be adjusted to the heater distribution line 18. A switching circuit 19 is provided.

The operation control unit 5 is configured to control the switching circuit 19 so as to adjust the power supplied to the electric heater 10 so that a reverse power flow is not detected by the current sensor 17.
Specifically, when there is no surplus power in the combined heat and power supply device 2, the current sensor 17 detects a current from the commercial system 13 (hereinafter referred to as a positive current) through the commercial line 15, and When surplus power is generated, the current sensor 17 cannot detect the positive current value. Accordingly, when the forward current value detected by the current sensor 17 tends to decrease, the operation control unit 5 performs the switching so that the forward current value becomes the set lower limit current value for preventing reverse power flow. The circuit 19 is configured to be controlled.
That is, when the positive direction current value detected by the current sensor 17 is equal to or less than the set lower limit current value, the management unit 9 configured by the operation control unit 5 causes the current sensor 17 to supply the heat and power cogeneration device 2 It is configured to determine that the surplus power is detected.

Hereinafter, the charge / discharge control unit 8 and the management unit 9 will be described. In this reference embodiment, since the management unit 9 is configured by the operation control unit 5, the management unit 9 is operated. It will be described as the control unit 5.
When the current sensor 17 detects that there is surplus power of the combined heat and power supply device 2, the operation control unit 5 may indicate information indicating that there is surplus power (hereinafter referred to as surplus power presence information). Is connected to the charge / discharge control unit 8 of each of the rechargeable devices 1A and 1B, and the surplus power presence signal is being communicated, the surplus power of the cogeneration device 2 is detected by the current sensor 17. When it is detected that there is no excess power, the communication of the surplus power presence information is stopped.
Incidentally, the operation control unit 5 is configured to output an ON signal corresponding to the surplus power presence information.

Then, the charging / discharging control unit 8 of each continuous energization type rechargeable device 1 </ b> A performs charging operation when surplus power presence information is communicated from the operation control unit 5, that is, when there is surplus power of the combined heat and power supply device 2. When the surplus power presence information is transmitted from the operation control unit 5, that is, when there is no surplus power of the cogeneration apparatus 2, the discharge operation is performed.
Further, when the surplus power presence information is communicated from the operation control unit 5, the charge / discharge control unit 8 of each charge switching type rechargeable device 1B sets the charge switching type rechargeable device 1B to a charged state. In the charge state of the charge-switchable rechargeable device 1B, the charging operation is performed.

  Further, the operation control unit 5 is configured to supply the remaining electric power charged in the storage battery 7 to the electric heater 10 when the surplus power of the combined heat and power supply device 2 is larger than the electric power that can be charged in the storage battery 7. Has been.

Hereinafter, based on the time chart shown in FIG. 2, the control operations of the charge / discharge control unit 8 and the operation control unit 5 will be described.
(A) of FIG. 2 is provided in the said power consumption location when not charging the storage battery 7 of each continuous energization type rechargeable apparatus 1A and each charge switching type rechargeable apparatus 1B. The time-dependent change of the electric power load Rt (henceforth a total electric power load) by all the electric power consumption apparatuses 1 and the generated electric power O of the thermoelectric cogeneration apparatus 2 is shown.
(B) of FIG. 2 shows the timing at which the surplus power present information S is communicated from the operation control unit 5.
(C) of FIG. 2 shows the change over time of the power load R1 of one continuous energization type rechargeable device 1A including the power load for charging the storage battery 7 with the surplus power of the cogeneration device 2. (D) of FIG. 2 shows a change with time of the power load R2 for charging the storage battery 7 of the rechargeable device 1B of one charge switching type to the surplus power of the cogeneration device 2.
(E) in FIG. 2 shows the total electric power load Rt in the state including the charging loads of the continuous energization type rechargeable device 1A and the charge switching type rechargeable device 1B, and the power generation of the cogeneration device 2. The time-dependent change of each electric power O is shown.

As shown in (a) and (e) of FIG. 2, the operation control unit 5 operates the cogeneration apparatus 2 in a set operation time period from time Ts to time Te.
The set operation time zone is set by the operation control unit 5 using various known methods. For example, based on the measurement information of each of the actual power load and the thermal load of the power consumption point, the predicted power load and the predicted heat load of the operation target for one day are obtained, and based on the predicted power load and the predicted heat load, The set operation time zone is set so as to mainly cover the heat load.

  As shown in FIG. 2A, in the case where the storage battery 7 of each continuously energized rechargeable device 1A and each rechargeable rechargeable device 1B is not charged, the time period from time Ts to T1. And if there is surplus power of the combined heat and power supply device 2 in the time zone from time T2 to Te, the current sensor 17 uses the time zone from time Ts to T1 and the time zone from time T2 to Te. Since it is detected that there is surplus power of the combined heat and power supply device 2, as shown in (b) of FIG. 2, the operation control unit 5 is in the time zone from the time Ts to T1 and the time zone from the time T2 to Te. The surplus power present information is communicated, and the surplus power present information communication is stopped in other time zones.

  As shown in (c) of FIG. 2, the charging / discharging control unit 8 of the continuous energization type rechargeable device 1 </ b> A includes the time period from the time Ts to T <b> 1 when the surplus power presence signal is communicated from the operation control unit 5. Since the charging operation is performed in the time period from time T2 to Te, the power load R1 of the continuously energized rechargeable device 1A is charged in the time period from time Ts to T1 and in the time period from time T2 to Te. Will increase by minutes.

  As shown in (d) of FIG. 2, the charge / discharge control unit 8 of the charge-switchable rechargeable device 1 </ b> B includes the time period from time Ts to T <b> 1 when the surplus power presence signal is communicated from the operation control unit 5. In the time period from time T2 to Te, the charge switching type rechargeable device 1B is switched to the charging state by switching the charging / disconnecting switch 12 to the ON state, and the charging operation is executed while the charging state is in the charging state. Therefore, in the time zone from time Ts to T1 and the time zone from time T2 to Te, the electric power R2 for charging the storage battery 7 is consumed in the charge switching type rechargeable device 1B.

  As shown in (e) of FIG. 2, even when the surplus power of the combined heat and power supply device 2 is charged to the storage batteries 7 of all the rechargeable devices 1A and 1B, there is still surplus power (the portion indicated by hatching). The operation control unit 5 controls the switching circuit 19 so that the positive direction current value detected by the current sensor 17 becomes the set lower limit current value. Therefore, the remaining surplus power charged in the storage battery 7 is It is consumed by the electric heater 10.

  In the state where the surplus power of the cogeneration device 2 is charged in the storage battery 7 of the rechargeable devices 1A and 1B as described above, the surplus power of the cogeneration device 2 decreases and is detected by the current sensor 17. When the forward direction current value tends to rise from the set lower limit current value, the operation control unit 5 stops communication of the surplus power presence signal, so the charge / discharge control unit 8 of each rechargeable device 1A, 1B is charged. Stop operation.

Next, the hot water storage unit WU will be described.
The hot water storage unit WU is configured to store hot water in a state where temperature stratification is formed, hot water circulation pump 22 for circulating hot water in the hot water storage tank 3 through the hot water circulation path 21, and hot water for heat source through the heat source circulation path 23. A heat source circulation pump 24 that circulates water, a heat medium circulation pump 26 that circulates the heat medium to the heating terminal 4 through the heat medium circulation path 25, and a hot water storage heat exchanger 27 that heats the hot water flowing through the hot water circulation path 21. , Heat source heat exchanger 28 for heating the heat source hot water flowing through the heat source circulation path 23, heat medium heating heat exchanger 29 for heating the heat medium flowing through the heat medium circulation path 25, and the hot water storage tank 3 And an auxiliary hot water heater 31 for heating the hot water flowing through the hot water supply passage 30 and flowing through the heat source circulation passage 23, and the like.

The hot water circulation path 21 is branched and connected so that a part thereof is in parallel, a three-way valve 32 is provided at the connection location, and a radiator 33 is provided in the branched flow path. Yes.
Then, by switching the three-way valve 32, the hot water taken out from the lower part of the hot water storage tank 3 is circulated so as to pass through the radiator 33, and the hot water taken out from the lower part of the hot water storage tank 3 is circulated so as to bypass the radiator 33. It is comprised so that it may switch to the state to be made to.

Through the hot water supply passage 30, hot water in the hot water storage tank 3 is supplied to a hot water supply destination such as a bathtub, a hot water tap, and a shower.
The heat source circulation path 23 is provided so as to form a circulation path in a state where a part of the hot water supply path 30 is shared.
The auxiliary hot water heater 31 is provided so as to heat hot water flowing through a shared portion of the hot water supply passage 20 with the heat source circulation passage 23.

In the middle of the cooling water circulation path 34 for circulating the cooling water of the gas engine 2e, there is provided a parallel flow path portion that branches into two paths and then merges again. The heat exchanger 27 is provided, and the heat source heat exchanger 28 is provided on the other side.
The cooling water circulation path 34 is provided with a cooling water circulation pump 35. Further, at the branching point of the cooling water circulation path 34, the flow rate of cooling water to be passed to the hot water storage heat exchanger 27 side and heat for heat source are provided. A diversion valve 36 is provided for adjusting the ratio of the flow rate of the cooling water to be passed to the exchanger 28 side.
The diversion valve 36 allows the entire amount of cooling water in the cooling water circulation path 34 to flow to the hot water storage heat exchanger 27 side, or allows the entire amount of cooling water in the cooling water circulation path 34 to flow to the heat source heat exchanger 28 side. It is also configured to be able to.

In the hot water storage heat exchanger 27, the hot water flowing through the hot water circulation path 21 is heated by flowing the cooling water of the cooling water circulation path 34 that has recovered the heat output from the combined heat and power supply device 2. It is configured.
In the heat source heat exchanger 28, the heat source hot water flowing through the heat source circulation path 23 is passed by flowing the cooling water of the cooling water circulation path 34 that has recovered the heat output from the combined heat and power supply device 2. It is configured to be heated.
The heat source circulation path 23 is provided with a heat source interrupting valve 37 for interrupting the flow of the heat source hot water.
In the heat exchanger 29 for heat medium heating, the heat medium flowing through the heat medium circulation path 25 is passed by flowing hot water for the heat source heated by the heat exchanger 28 for the heat source or the auxiliary water heater 31. It is configured to be heated.
The heating terminal 4 includes a floor heating device, a bathroom heating device, and the like.

  The operation control unit 5 controls the operation of the combined heat and power supply device 2 while operating the cooling water circulation pump 35 during the operation of the combined heat and power supply device 2, as well as the hot water circulation pump 22, the heat source circulation pump 24, and the heat medium. By controlling the operating state of the circulation pump 26, the hot water storage operation for storing hot water in the hot water storage tank 3 and the heating operation for heating the heating target area by supplying a heating medium to the heating terminal 4 are configured. Yes.

Next, description will be made on operations of the hot water storage operation and the heat medium supply operation by the operation control unit 5.
In the hot water storage operation, hot water flowing through the hot water circulation path 21 in the hot water storage heat exchanger 27 by the cooling water flowing through the cooling water circulation path 34 by the operation of the cooling water circulation pump 35 during the operation of the combined heat and power supply device 2. Is carried out in a state where it can be heated.
Then, the three-way valve 32 is switched to a state in which hot water taken out from the lower part of the hot water storage tank 3 is circulated so as to bypass the radiator 33, and the hot water circulation pump 22 is operated to supply hot water from the lower part of the hot water storage tank 3. The hot water is taken out to 21 and heated by passing through a hot water storage heat exchanger 27 and then returned to the upper part of the hot water storage tank 3 to store hot water in the hot water storage tank 3.

  Although not shown, a hot water storage amount detecting means for detecting the hot water storage amount of the hot water storage tank 3 is provided, and when the hot water storage amount detection means detects that the hot water storage amount in the hot water storage tank 3 is full. The hot water taken out from the lower part of the hot water storage tank 3 is switched to the state in which the hot water taken out from the lower part of the hot water storage tank 3 is circulated so as to pass through the radiator 33 and the radiator 33 is operated to After heat dissipation, the hot water storage heat exchanger 27 is passed through and heated.

  In the heating operation, when the start of the heating operation is instructed from a heating remote controller (not shown), the heat source circulation pump 24 and the heat medium circulation pump 26 are operated in a state where the heat source intermittent valve 37 is opened, The heat source hot water is heated in at least one of the heat exchanger 28 and the auxiliary water heater 31, and the heated heat source hot water is circulated in a state of passing through the heat medium heating heat exchanger 29. In the heating heat exchanger 29, the heating medium heated by the hot water for the heat source is circulated and supplied to the heating terminal 4.

  The heating source hot water will be described. When the combined heat and power supply device 2 is in operation, the diverter valve 36 is adjusted so that the cooling water flows to the heat source heat exchanger 28 side. By operating the cooling water circulation pump 35, the heat source heat exchanger 28 is configured to heat the hot water for the heat source.

  Incidentally, when performing the hot water storage operation and the heating operation at the same time during the operation of the combined heat and power supply device 2, the operation control unit 5 controls the diversion valve 36 based on the current heating heat load required by the heating terminal 4. Thus, the ratio of the flow rate of the cooling water to be passed to the hot water storage heat exchanger 27 side and the flow rate of the cooling water to be passed to the heat source heat exchanger 28 side is adjusted.

Hereinafter, since although describing the implementation embodiments of the present invention, in embodiments of the present invention, except that the configuration of the charging and discharging control unit 8 and the managing unit 9 is different are constituted similarly to the embodiment of the reference, In order to avoid duplicate description, the same reference numerals are given to the same constituent elements as those in the reference embodiment and the constituent elements having the same actions, and the description thereof is omitted. Mainly, the charge / discharge control unit 8 and the management unit 9 The configuration will be described.

Embodiment of the present invention
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 3 and 4.
In the embodiment of the present invention, in the control operation of the management unit 9, the control operation for the switching circuit 19 is performed so that the reverse flow is not detected by the current sensor 17, as in the above-described reference embodiment. The switching circuit 19 is controlled to adjust the power supplied to the heater 10, but the control operation for the charge / discharge control unit 8 is different from the reference embodiment.

Hereinafter, the surplus power detection means D, the charge / discharge control unit 8 and the management unit 9 will be described with reference to FIG. In the embodiment of the present invention, the management unit 9 is configured by the operation control unit 5 as in the above-described reference embodiment. Therefore, the management unit 9 is described as the operation control unit 5. I will explain.
In this embodiment of the present invention, the charge / discharge control unit 8 of each of the plurality of rechargeable devices 1 </ b> A, 1 </ b> B is configured to communicate the chargeable power amount of each storage battery 7 to the operation control unit 5. Yes.
And the operation control part 5 is the surplus electric energy of the said combined heat and power supply apparatus 2 detected by the surplus electric power detection means D, the charge communicated from the charging / discharging control part 8 of each of the plurality of rechargeable devices 1A, 1B. Based on the possible electric energy and preset setting selection conditions, the one that charges the surplus power of the combined heat and power supply device 2 is selected from the storage batteries 7 of the plurality of rechargeable devices 1A and 1B, and the selected storage battery 7 is configured to instruct a charging command to the charging / discharging control unit 8 corresponding to 7, and the charging / discharging control unit 8 executes a charging operation when the charging command is commanded from the operation control unit 5, and the charging command The discharge operation is executed when no command is issued.

In this embodiment of the present invention, the setting selection condition is the largest or less than the surplus power amount of the combined heat and power supply apparatus 2 in which the chargeable power amount is detected by the surplus power detection means D among the plurality of storage batteries 7. The condition is set such that selecting the storage battery 7 is repeated until there is no storage battery 7 having a chargeable power amount equal to or less than the surplus power amount of the cogeneration apparatus 2 detected by the surplus power detection means D.

  In addition, when the surplus power detection means D detects that there is no surplus power while the operation control unit 5 is instructing a charge command, the rechargeable device 1A that is instructing the charge command at the present time , 1B from the charge / discharge control unit 8 of the rechargeable device 1A, 1B having the smallest chargeable power, the charging command is stopped in order.

Further, as in the reference embodiment, when the surplus power of the combined heat and power supply device 2 is greater than the power that can be charged in the storage battery 7, the operation control unit 5 uses the remaining surplus power charged in the storage battery 7 as described above. The electric heater 10 is configured to be supplied.

The surplus power detection means D will be described. As described above, when the positive current value detected by the current sensor 17 tends to be lower than the set lower limit current value, the operation control unit 5 determines that the positive current value is the set lower limit current value. The switching circuit 19 is controlled so that the surplus power amount of the cogeneration apparatus 2 is obtained based on the control state of the switching circuit 19.
That is, when the operation control unit 5 does not command the charge command, the positive direction current value detected by the current sensor 17 tends to be lower than the set lower limit current value. The switching circuit 19 is controlled so that the current value becomes the set lower limit current value. Based on the control state of the switching circuit 19, the surplus power amount of the cogeneration device 2 is obtained, and the charging command is commanded. Thereafter, if the positive direction current value detected by the current sensor 17 tends to be lower than the set lower limit current value, the switching circuit 19 is set so that the positive direction current value becomes the set lower limit current value. Then, based on the control state of the switching circuit 19, the surplus power amount of the cogeneration apparatus 2 is obtained.
That is, the surplus power detection means D is configured by the management unit 9, the current sensor 17, and the switching circuit 19 configured by the operation control unit 5.

Hereinafter, based on the time chart shown in FIG. 4, control operations of the charge / discharge control unit 8 and the operation control unit 5 will be described.
In this embodiment, the largest amount of rechargeable power is the rechargeable device 1A ₁ of the plurality of continuously energized rechargeable devices 1A, and the rechargeable power amount is 2 to large-th, and a variable rechargeable device 1B ₁ of one of the chargeable type device 1B of the plurality of charging switching type.

FIG. 4A shows the total power load Rt and the combined heat and power device when the storage battery 7 of each continuously energized rechargeable device 1A and each rechargeable rechargeable device 1B is not charged. The change with time of each of the generated power O of 2 is shown.
That is, similarly to the above-described reference embodiment, the operation control unit 5 sets the set operation time zone to the time zone from time Ts to time Te, and in the set operation time zone Ts to Te, the combined heat and power supply device 2 is driven.
(B) of FIG. 4 shows the surplus electric power Or of the cogeneration apparatus 2 when the rechargeable battery 1A of each continuous energization type and the rechargeable battery 1B of each charge switching type are not charged. Shows change over time

As shown in (c) and (d) of FIG. 4, the operation control unit 5 is configured such that the detected surplus power detected by the surplus power detecting means D has the largest chargeable power amount 1A _1. It becomes a chargeable electric energy or more, of directing charge command to the charging and discharging control unit 8 of the portable rechargeable device 1A _1, further, in a state in which the command so the charge command, detected by the surplus power detecting means D When the detected surplus power amount becomes equal to or higher than the chargeable power amount of the rechargeable device 1B ₁ having the next highest chargeable power amount, a charge command is commanded to the charge / discharge control unit 8 of the rechargeable device 1B ₁ .

Further, the operation control unit 5 detects that there is no surplus power in the surplus power detection means D in the state where the charge command is instructed to the rechargeable device 1A ₁ and the rechargeable device 1B ₁ as described above. Then, the charge command instruction to the charge / discharge control unit 8 of the rechargeable device 1B ₁ having the smaller chargeable power amount is stopped, and further, the surplus power detection means D detects that there is no surplus power. Then, the charging command to the charging / discharging control unit 8 of the rechargeable device 1A ₁ is stopped.

As shown in (e) of FIG. 4, the charge / discharge control unit 8 of the rechargeable device ₁ </ b> A ₁ for which the charge command is commanded by the operation control unit 5 is instructed while the charge command is commanded from the operation control unit 5. since performing a charging operation, power load R1 of the variable rechargeable device 1A ₁ is in a time zone that is running charging operation, it will increase its charge amount.

As shown in (f) of FIG. 4, the charge / discharge control unit 8 of the rechargeable device ₁ </ b> B ₁ for which the charge command is commanded by the operation control unit 5 is instructed while the charge command is commanded from the operation control unit 5. Since the chargeable device 1B is set in the charged state by switching the charge interrupting switch 12 to the ON state and the charging operation is executed while the chargeable device 1B is in the charged state, a charge command is commanded from the operation control unit 5. In the rechargeable device 1 </ b> B ₁ , the electric power R <b> 2 for charging the storage battery 7 is consumed.

  As shown in FIG. 4G, surplus power (the portion indicated by hatching) is still present even when the storage battery 7 of the rechargeable device 1A, 1B selected as described above is charged with the surplus power of the cogeneration device 2. In such a state, the operation control unit 5 controls the switching circuit 19 so that a reverse power flow is not detected by the current sensor 17, so that the remaining surplus power charged in the storage battery 7 is consumed by the electric heater 10. The

  That is, the surplus power of the combined heat and power supply device 2 is stored in the rechargeable devices 1A and 1B in a state where no reverse power flow is generated in the current flowing through the commercial line 15 and power from the commercial system 13 is unnecessarily consumed. It is configured to be charged.

[Another embodiment]
Next, another embodiment will be described.
(A) As said storage battery 7, various storage batteries, such as a lithium ion battery, a nickel-cadmium battery, and a lead storage battery, can be used.
In addition to the storage battery 7, for example, a capacitor can be used as the storage means.

( B ) The specific configuration of the power generation means is not limited to the combined heat and power supply device 2 exemplified in the above embodiments, and for example, a fuel cell can be used.

( C ) In the above embodiment, the case where the present invention is applied to a cogeneration system including the cogeneration system 2 that generates electric power and heat as power generation means is illustrated. However, the present invention is not limited to the cogeneration system. The present invention can also be applied to a power generation system including a generator that generates electric power as a power generation means.

Overall configuration diagram of a cogeneration system equipped with power consumption equipment according to a reference embodiment The figure explaining the control operation of the cogeneration system provided with the power consumption equipment concerning a reference embodiment The whole block diagram of the cogeneration system provided with the power consumption equipment which concerns on embodiment of this invention A figure explaining control operation of a cogeneration system provided with power consumption equipment concerning an embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric power consumption apparatus 2 Electric power generation means, cogeneration apparatus 3 Hot water storage tank 5 Operation control means 7 Power storage means 8 Charging / discharging control means 9 Management means 10 Electric heater 11 DC power supply part 13 Commercial system 16 Feed line D Surplus power detection means WU Hot water storage means

Claims (3)

A power consuming facility provided with power generation means for supplying power to the power consuming device at a power consuming portion provided with a power consuming device connected to a commercial system ,
The power consuming device is provided with power storage means for storing power consumed by itself, and charge / discharge control means for controlling charge / discharge with respect to the power storage means,
Management means for controlling the operation of the charge / discharge control means is provided so as to charge the power storage means with surplus power of the power generation means,
The charge / discharge control means of each of the plurality of power consuming equipment as the power consuming equipment is configured to communicate the chargeable power amount of the power storage means to the management means,
The management means detects the surplus power amount of the power generation means detected by the surplus power detection means, the chargeable power amount communicated from the charge / discharge control means of each of the plurality of power consuming devices, and preset setting selection conditions On the basis of the power storage means of the plurality of power consuming devices, the one that charges the surplus power of the power generation means is selected, and a charge command is commanded to the charge / discharge control means corresponding to the selected power storage means Configured as
The charge / discharge control means is configured to execute a charge operation when a charge command is commanded from the management means, and to execute a discharge operation when the charge command is not commanded,
The setting selection condition is to select, from among the plurality of power storage means, the power storage means whose chargeable power amount is equal to or less than the surplus power amount of the power generation means detected by the surplus power detection means. , The condition is set to repeat until there is no more power storage means with a chargeable power amount equal to or less than the surplus power amount of the power generation means detected by the surplus power detection means,
In the state where the management means is instructing the charging command, when the surplus power detecting means detects that there is no surplus power, among the power storage means commanding the charging command at that time from chargeable said order from the charge and discharge control means of the power amount is smallest the accumulator unit, power equipment is configured to stop the command for the charging command. The power generation means is configured to generate AC power;
A power feed line that feeds power from the power generation means to the power consuming device is connected to a commercial system,
The power consuming device includes a DC power supply unit that converts supplied AC power into DC power, and is configured to consume DC power converted by the DC power supply unit.
The power consuming equipment according to claim 1, wherein the power storage unit is configured to store DC power converted by the DC power supply unit . A cogeneration system comprising the power consuming equipment according to claim 1 or 2,
The power generation means is constituted by a cogeneration device that generates heat and electric power,
Hot water storage means for storing hot water in a hot water storage tank with heat generated by the combined heat and power supply device, and an electric heater for converting supplied electric power into heat stored in the hot water storage tank are provided,
A cogeneration system provided with operation control means for supplying, to the electric heater, the remaining surplus power charged in the power storage means when the surplus power of the combined heat and power supply device is larger than the power chargeable to the power storage means. .

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