JP2005267247A - Energy management device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an energy management device for urging a consumer to accurately carry out the effective utilization of excess energy, and to save energy and to reduce energy costs. <P>SOLUTION: This energy management device is provided with an energy information acquisition means 1a for acquiring the current energy generation quantity of an energy generating device and the current energy consumption of overall energy consumption equipment 3 and a using condition calculation means 1b for calculating excess energy quantity, load rate or excess rate in the consumer 4 based on the energy generation quantity and the energy consumption and an output means 1e for outputting any of the excess energy quantity, excess rate, load rate or such purchase status that energy is purchased from an external energy supply institute or the combination of them. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a consumer who has a private energy generator and can purchase the energy generated by an external energy supply engine in a state where the energy consumed in the private house is insufficient, and is provided in the consumer. The present invention relates to an energy management device that supports the consumer who consumes the energy.

In recent years, from the viewpoint of energy saving (hereinafter abbreviated as energy saving) and effective use of energy, energy generation devices such as cogeneration devices and solar cells are spreading not only in the industrial field but also in homes.
In order to save energy and reduce costs, for example, the consumption of fuel gas, tap water, and electric power is measured to comprehensively manage each energy consumed by consumers, and each generation amount of heat and electricity In addition, there is an energy management device of a cogeneration device that displays each usage amount and each charge of fuel gas, tap water, and electric power (for example, see Patent Document 1). Here, in a cogeneration apparatus that generates heat and electric power using a gas engine or the like, generally, the amount of waste heat is larger than the amount of power generation, and therefore, a heat main operation is performed. In the heat main operation, in order to save energy and effectively use energy, the apparatus is operated in a time zone in which there is much demand for hot water supply and heating, and waste heat can be used effectively. However, in the heat main power operation, the power generation amount and the power consumption amount do not match. For this reason, power must be purchased when the amount of power generation is less than the amount of power consumption, and power is sold when the amount of power generation exceeds the amount of power consumption. There wasn't. In addition, such a state is also the same in a generation device that uses a fuel cell that performs an electric main heat slave operation, and it has not always been sufficient to effectively use the energy generated from the cogeneration device.

JP 2002-367619 A

On the other hand, in order to make effective use of surplus power, when the cogeneration system is operated automatically, the operating status of the cogeneration system is displayed to alert the consumer, and the power consumption equipment is installed at an appropriate time. It can also be prompted to use.
However, it is difficult for the consumer to determine how much power can be used only by displaying the operating state of the cogeneration apparatus. Moreover, in this form, since there is a difference in the amount of surplus energy depending on the time zone, simply by displaying the time zone in which surplus power is generated, the consumer concentrates the use of electricity in the time zone where the surplus energy amount is small. There is a risk that. As a result, electric power is consumed in excess of the amount of power generation, and it may be necessary to purchase power, and there remains a possibility that energy saving and cost reduction cannot be properly achieved.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an energy management apparatus in which a consumer can accurately promote the effective use of surplus energy to achieve energy saving and energy cost reduction. In the point.

[Characteristic configuration 1]
In order to achieve this object, according to the present invention, there is a consumer who can purchase the energy generated by an external energy supply engine in a state where the energy consumed in the house is insufficient, while having a private energy generator. The first characteristic configuration of the energy management device that supports the consumer who consumes the energy by the energy consuming device provided in the consumer is the current energy generation amount of the energy generating device and the current energy generation device as a whole. Energy information acquisition means for acquiring the energy consumption amount of the consumer, and calculates a surplus energy amount, a surplus rate or a load factor in the consumer based on the energy generation amount and the energy consumption amount obtained by the energy information income means Use state calculating means, the surplus energy amount, the surplus rate, the load Or, in that an output means for outputting one or a combination of those purchasing state has purchased energy from the external energy supply agency.

The surplus energy amount here is obtained as a difference between the energy generation amount of the energy generating device and the energy consumption amount of the energy consuming device, and the surplus rate is obtained as a ratio or a ratio of the surplus energy amount to the energy generation amount. The load factor is obtained as a ratio or a ratio of the energy consumption to the energy generation amount. The purchase state is the energy amount, the fee, etc. of the energy being purchased.
That is, according to the first feature configuration, the surplus energy amount, the surplus rate, the load factor, the purchase state, or a combination thereof is presented, so that the consumer can determine, for example, how much the energy generation performance of the energy generating device is. It is possible to easily grasp whether there is room. As a result, it is possible to promote effective use of surplus energy for the consumer, and energy saving and energy cost reduction can be achieved.

[Characteristic configuration 2]
In order to achieve this object, according to the present invention, there is a consumer who can purchase the energy generated by an external energy supply engine in a state where the energy consumed in the house is insufficient, while having a private energy generator. The second characteristic configuration of the energy management device that supports the consumer that consumes the energy by the energy consuming device provided in the consumer is the operation schedule information of the energy generating device and the energy demand related information of the energy consuming device. Energy information acquisition means for acquiring the amount of surplus energy, surplus rate or load factor in the customer within a certain period based on the operation schedule information and the energy demand related information acquired in the energy information acquisition means. Calculate, and the amount of surplus energy or the time when the surplus rate is high, or A preferred time consumption determining means for determining the periods of low load factor as preferred consumer time zone, in that it comprises an output means for outputting the preferred consumption time zone determined by the preferred consuming time determination means.

  In other words, according to the second feature configuration, the preferred consumption time zone is presented to the consumer, so that the consumer can easily grasp the time zone in which the energy generation performance of the energy generating device is sufficient in advance. . Therefore, it becomes possible for a consumer to adjust beforehand the time zone which uses an energy consuming apparatus, and it can aim at energy saving and reduction of energy cost by utilizing surplus energy effectively.

[Characteristic configuration 3]
In order to achieve this object, according to the present invention, there is a consumer who can purchase the energy generated by an external energy supply engine in a state where the energy consumed in the house is insufficient, while having a private energy generator. The third characteristic configuration of the energy management device that supports the consumer consuming the energy by the energy consuming device provided in the consumer is the operation schedule information of the energy generating device and the energy demand related information of the energy consuming device. Energy information acquisition means for acquiring the energy information, and the energy generation amount of the energy generation device is then calculated based on the operation schedule information and the energy demand related information acquired by the energy information acquisition means. Next consumption time determination means for determining the next consumption time zone exceeding consumption In that it comprises an output means for outputting the next consumption time zone determined by the next time consumption determining means.

  That is, according to the third characteristic configuration, the consumer can easily grasp the time zone in which the energy generation amount of the energy generation device next exceeds the energy consumption amount. For this reason, when consumers are purchasing energy, for example, checking the time of use of energy consuming equipment that does not need to be used or energy consuming equipment that can be used for the next time, such as checking irons and e-mails. It can be shifted to the consumption time zone. Therefore, the consumer can reduce the energy purchase amount by reducing the energy purchase amount, and can effectively use the energy from the energy generating device.

[Characteristic configuration 4]
In order to achieve this object, the fourth characteristic configuration of the energy management device according to the present invention is characterized in that the demand generated when the amount of energy generated by the private energy generation device exceeds the amount of energy consumed by the energy consuming device. A surplus amount of energy can be sold from the house to the external energy supply engine, and the output means is configured to output a sales state in which the energy is sold to the external energy supply engine. is there.
In other words, according to the fourth feature configuration, since the consumer can easily grasp the sales status of energy sales, sales charges, etc., the energy can be effectively utilized to save energy and reduce energy costs. Can be planned.

[Characteristic configuration 5]
In order to achieve this object, a fifth characteristic configuration of the energy management device according to the present invention is that the external energy supply engine is a power supply engine and the private energy generation device is a cogeneration device.
That is, according to the fifth characteristic configuration, it is possible to effectively use surplus energy of the cogeneration device that generates heat and power using a gas engine or a fuel cell, that is, surplus power, and reduce the amount of power purchased. Can save energy.

[Characteristic configuration 6]
In order to achieve this object, a sixth characteristic configuration of the energy management device according to the present invention is that the energy is electric power and the self-energy generating device is a solar cell.
That is, according to the sixth characteristic configuration, it is possible to effectively use the surplus power of the solar cell, and to save energy by reducing the amount of power purchased.

An embodiment of an energy management apparatus according to the present invention (hereinafter, abbreviated as “the present apparatus” as appropriate) will be described with reference to the drawings.
The energy management device 1 according to the present invention is a consumer 4 having a private energy generation device and capable of purchasing energy generated by an external energy supply engine in a state where the energy consumed in the private house is insufficient. The present invention is applied to a consumer 4 who consumes energy by an energy consuming device 3 provided in the house 4.

First, a first embodiment of an energy management device 1 according to the present invention will be described with reference to FIG.
The energy generation device of the present embodiment is a cogeneration device 2 that performs a heat main power slave operation. The cogeneration device 2 includes a wattmeter that measures the current power generation amount of the cogeneration device 2 as energy generation amount measurement means. 5 is installed. The energy managed by the energy management device 1 is assumed to be electric power. The energy consuming device 3 is a power consuming device, and a wattmeter for measuring the current power consumption of the energy consuming device 3 as a whole is installed in the consumer 4 as the energy consumption measuring means 6. An external energy supply engine that purchases and sells energy is a power supply engine such as a power plant, and a wattmeter that measures the current amount of purchased power from the power supply engine is provided to the consumer 4 as a purchase energy amount measuring means 7. It is installed as.

  Furthermore, in the present embodiment, the power supply engine is configured to be able to sell surplus energy, that is, surplus power, and a power meter that measures the current sales power amount for the power supply engine is installed as the sales energy amount measuring means 8. Yes.

  The cogeneration apparatus 2 is configured to generate electricity using a fuel cell, a gas engine, or the like to supply power to the consumer 4 and to supply heat to the consumer 4 via the hot water supply / heating unit 9. Furthermore, the cogeneration apparatus 2 learns the demand pattern of heat and electric power of the customer 4 for 7 days × 24 hours, and performs operation control based on the demand pattern. The cogeneration apparatus 2 is provided with a gas meter 11, the hot water supply / heating unit 9 is configured to receive supply of clean water, and a water meter 12 for measuring the supply amount is connected. .

  Further, the cogeneration apparatus 2 includes an operation schedule information creating unit 2a and an energy demand related information creating unit 2b. In the present embodiment, the operation schedule information creating unit 2a and the energy demand related information creating unit 2b are constructed in software using a computer for operation control installed in the cogeneration apparatus 2.

  For example, in the case of the cogeneration apparatus 2 that is operating by learning control, the operation schedule information creating unit 2a is operated for a predetermined period, for example, 24 hours from the present time based on the demand pattern of the customer 4. Data indicating the scheduled time and its operation rate or power generation amount is created as operation schedule information. Similarly, the energy demand related information creation means 2b uses, as the energy demand related information, prediction data of the power demand pattern for 24 hours from the present time within the same period as the operation schedule information based on the demand pattern of the customer 4. create. The cogeneration device 2 outputs the operation schedule information and the energy demand related information based on the access from the energy management device 1.

  The energy management device 1 includes an energy information acquisition unit 1a, a usage state calculation unit 1b, a preferred consumption time determination unit 1c, a next consumption time determination unit 1d, and an output unit 1e. Here, the energy management apparatus 1 is realized by executing a predetermined program on a computer installed in the consumer 4, and includes an energy information acquisition unit 1a, a usage state calculation unit 1b, and a suitable consumption time determination. The means 1c, the next consumption time determination means 1d, and the output means 1e are constructed in software.

  The energy information acquisition unit 1 a acquires the current power generation amount per unit time in the cogeneration apparatus 2 using the energy generation amount measurement unit 5, and uses the energy consumption measurement unit 6 to determine the current amount of energy consumption in the entire energy consumption device 3. The power consumption per unit time is acquired, and the operation schedule information and energy demand related information are acquired from the cogeneration apparatus 2. Furthermore, in this embodiment, when purchasing power from the power supply engine, the purchased power amount is acquired using the purchased energy amount measuring means 7, and when power is sold to the power supply engine, The sales power amount is acquired using the sales energy amount measuring means 8.

  Based on the current power generation amount and power consumption of the cogeneration apparatus 2 acquired by the energy information acquisition unit 1a, the usage state calculation unit 1b calculates a surplus power amount, a surplus rate, or a load factor in the customer 4. The surplus power here is obtained by EG-CE [Wh] using the power generation amount EG [Wh] and the power consumption CE [Wh] of the customer 4, and the surplus rate is (EG-CE) / It is calculated | required by EGx100 [%], and a load factor is calculated | required by CE / EGx100 [%]. In this embodiment, the surplus rate and the load factor are calculated as percentages, but it is desirable to calculate them in units that are easily recognized by consumers.

  The preferred consumption time determination unit 1c receives the operation schedule information and the energy demand related information from the energy information acquisition unit 1a, and calculates a surplus power amount, a surplus rate, or a load factor within a certain period. Specifically, the operation schedule information and the energy demand related information are divided at regular intervals, and the surplus power amount, the surplus rate, or the load factor is calculated for each division. The predetermined time is set in consideration of the switching timing of the operation control of the cogeneration apparatus 2, the transition time of the demand pattern of the power of the customer 4, and the like. Then, for example, a time zone in which the surplus power amount or surplus rate is 0 or more or a time zone in which the load factor is less than 100% is determined as the preferred consumption time zone. The suitable consumption time determination unit 1c may be configured to use only the determination by using the function of the utilization state calculation unit 1b for calculating the surplus power amount, the surplus rate, or the load factor for each section.

  The next consumption time determination unit 1d receives the operation schedule information and the energy demand related information from the energy information acquisition unit 1a, and the next generation time period in which the power generation amount of the cogeneration device 2 next exceeds the power consumption amount of the entire energy consumption device 3 Determine. In the present embodiment, the current power generation amount and power consumption amount of the cogeneration apparatus 2 are acquired from the energy information acquisition unit 1a, and the determination is executed when the current power generation amount falls below the power consumption amount.

  Specifically, the operation information and the energy demand related information are divided at regular intervals, and it is determined in order of time whether the power generation amount exceeds the power consumption amount for each division, and then the power generation amount indicates the power consumption amount. The higher category is determined as the next consumption time zone. Furthermore, in order to prevent the inconvenience caused by the time when the surplus energy amount is small as the next consumption time zone and the consumer 4 concentrates the use of electricity in this time zone, for example, a threshold value is provided. Thus, it is also a preferred embodiment that the time zone in which the power generation amount exceeds the power consumption amount above the threshold is determined as the next consumption time zone. This determination is made by obtaining the surplus power amount, surplus rate, or load factor for each section from the preferred consumption time determining means 1c, and then the time zone or load factor when the surplus power amount or surplus rate is equal to or greater than a certain amount. You may make it extract the time slot | zone when becomes smaller than a predetermined value.

  The output means 1e outputs either one or both of display data and sound output data to the panel 10 based on the setting operation of the panel 10 of the consumer 4. Here, as shown in FIGS. 4 and 5, the panel 10 includes a display unit 10a, a sound output unit 10b, and operation units 10c to 10f. When the display data is received from the output means 1e, the data is displayed on the display unit 10a. When the sound output data is received, the sound output unit 10b reads the data by voice. It is.

  When the consumer 4 operates the panel 10 and selects the presentation of the usage state of the cogeneration apparatus 2, the output unit 1e acquires the surplus power amount, the surplus rate, or the load factor from the usage state calculation unit 1b. At the same time, the surplus power amount, the surplus rate, the load factor, or the purchase state in which energy is purchased from the power supply organization, or data of a combination thereof is output to the panel 10. The purchase state of the present embodiment is the purchased power amount acquired by the energy information acquisition unit 1a.

  4 (a) to 4 (c) and 5 (d) show display examples when the surplus power amount, the surplus rate, the load factor, and the purchase state are individually displayed on the display unit 10a. In addition, when displaying a purchase state, it is good also as a structure which displays the charge corresponding to purchase electric energy on the display part 10a, and is good also as a structure which displays both. 4 (a) to 4 (c) and 5 (d) show the case where the surplus power amount, the surplus rate, the load factor, and the purchase state are individually displayed. It is also a preferred embodiment to be configured to display.

  Further, when the consumer 4 operates the panel 10 and selects the presentation of the preferred consumption time zone, the output unit 1e outputs the preferred consumption time zone obtained by the preferred consumption time determination unit 1c to the panel 10. . FIG. 5E shows a display example of the preferred consumption time zone, in which the preferred consumption time zones are rearranged in order of increasing load factor and are displayed in a ranking in association with the load factor. The numbers on the figure indicate the order. In this case, the consumer can easily and accurately grasp the operation status of the cogeneration device 2. In addition, it is a preferable embodiment to change the load rate of FIG. 5E to the surplus power amount or surplus rate, and to display in association with the surplus power amount or surplus rate used for the determination.

  The output means 1e outputs the next consumption time zone obtained by the next consumption time determination means 1d to the panel 10 when the current power generation amount falls below the power consumption. FIG. 5D shows a display example of the next consumption time zone. In the present embodiment, when the power generation amount is lower than the power consumption amount, that is, when the power is in the purchase state, the next consumption time zone is displayed on the display unit 10a together with the purchase state. In addition, it is also a preferred embodiment that only the next consumption time zone is individually displayed.

  Further, the output unit 1e outputs a sales state in which power is sold to the power supply engine to the panel 10. The sales state here is the amount of electric power sold acquired by the energy information acquisition unit 1a. In addition, when displaying a sales state, it is good also as a structure which displays the charge corresponding to electric power sales amount on the display part 10a, and it is good also as a structure which displays both. FIG. 4C shows a display example of the sales state. In this embodiment, when the load factor is less than 100%, it is configured to automatically display together with the load factor. However, it is also a preferable embodiment to display only the sales state individually.

Next, a second embodiment of the energy management device 1 according to the present invention will be described with reference to FIG.
In the first embodiment, the case where the cogeneration device 2 is provided as an energy generation device has been described. However, in the present embodiment, the case where the solar cell 13 is provided as an energy generation device will be described.

  The solar cell 13 includes an operation schedule information creating unit 13a and an energy demand related information creating unit 13b. In the present embodiment, the operation schedule information creating unit 13 a and the energy demand related information creating unit 13 b are constructed in software using a computer for controlling the operation of the solar cell 13.

Here, the driving schedule information creating means 13a creates prediction data indicating the power generation amount transition for a predetermined period, for example, 24 hours from the present as driving schedule information based on past driving records and weather data. Similarly to the first embodiment, the demand related information creating unit 13b creates predicted data of a power demand pattern for 24 hours as energy demand related information.
As a result, the data required by the energy management device 1 according to the present invention can be generated, and functions equivalent to those of the first embodiment can be realized. Thus, energy saving and effective utilization of surplus energy can be achieved for the customer 4. Can be urged.

A third embodiment of the energy management device 1 according to the present invention will be described with reference to FIG.
In the first embodiment, an example in which surplus power can be sold to a power supply engine has been described. However, in the present embodiment, a case where power is not sold will be described.

In the present embodiment, when the power generation amount exceeds the power consumption amount, the surplus power is supplied to the hot water supply / heating unit 9 and converted into heat by the heater 9a, and the power meter for measuring the surplus power is used as the surplus energy amount. It is installed as measuring means 14. The surplus power amount used by the energy management apparatus 1 is not calculated using the utilization state calculating unit 1b, but is acquired from the surplus energy amount measuring unit 14 by the energy information acquiring unit 1a. The output unit 1e is configured to acquire the surplus power amount from the energy information acquisition unit 1a.
As a result, as in the first embodiment, it is possible to encourage the customer 4 to save energy and effectively use surplus energy.

Schematic of energy management device according to the present invention Schematic of energy management device according to the present invention Schematic of energy management device according to the present invention The schematic diagram of the display part used with the energy management apparatus which concerns on this invention The schematic diagram of the display part used with the energy management apparatus which concerns on this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Energy management apparatus 1a Energy information acquisition means 1b Utilization state calculation means 1c Suitable consumption time determination means 1d Next consumption time determination means 1e Output means 2 Cogeneration apparatus 2a Operation schedule information creation means 2b Energy demand related information creation means 3 Energy consumption equipment 4 Consumer 5 Energy generation amount measuring means 6 Energy consumption measuring means 7 Purchased energy amount measuring means 8 Sales energy amount measuring means 9 Hot water heating / heating unit 10 Panel 11 Gas meter 12 Water meter 13 Solar cell 14 Surplus energy amount measuring means

Claims (6)

A consumer who has a private energy generator and can purchase the energy generated by an external energy supply engine in a state where the energy consumed in the private house is insufficient, and the energy is consumed by an energy consuming device provided in the consumer. An energy management device that supports the consumer to consume,
Energy information acquisition means for acquiring a current energy generation amount of the energy generation device and a current energy consumption amount of the entire energy consuming device;
Based on the amount of energy generated and the amount of energy consumed in the energy information income means, a surplus energy amount in a consumer, a surplus rate, or a utilization state calculating means for calculating a load factor,
An energy management apparatus comprising: output means for outputting any of the surplus energy amount, the surplus rate, the load factor, or a purchase state in which energy is purchased from the external energy supply engine, or a combination thereof. A consumer who has a private energy generator and can purchase the energy generated by an external energy supply engine in a state where the energy consumed in the private house is insufficient, and the energy is consumed by an energy consuming device provided in the consumer. An energy management device that supports the consumer to consume,
Energy information acquisition means for acquiring operation schedule information of the energy generation device and energy demand related information of the energy consuming equipment;
Based on the operation schedule information acquired by the energy information acquisition means and the energy demand related information, a surplus energy amount, a surplus rate or a load factor in the consumer within a certain period is calculated, and the surplus energy amount or the surplus Preferred consumption time determination means for determining a time zone with a high rate or a time zone with a low load factor as a preferred consumption time zone;
An energy management apparatus comprising: output means for outputting the preferred consumption time zone obtained by the preferred consumption time determination means. A consumer who has a private energy generator and can purchase the energy generated by an external energy supply engine in a state where the energy consumed in the private house is insufficient, and the energy is consumed by an energy consuming device provided in the consumer. An energy management device that supports the consumer to consume,
Energy information acquisition means for acquiring operation schedule information of the energy generator and energy demand related information of the energy consuming equipment;
Based on the operation schedule information acquired by the energy information acquisition means and the energy demand related information, the next consumption time zone in which the energy generation amount of the energy generation device exceeds the energy consumption amount of the entire energy consuming device is then determined. Next time consumption determining means for determining;
An energy management apparatus comprising: output means for outputting the next consumption time zone obtained by the next consumption time determination means. When the amount of energy generated by the private energy generator exceeds the amount of energy consumed by the energy consuming device, the consumer is configured to be able to sell an excess amount of energy to the external energy supply engine,
The energy management apparatus according to any one of claims 1 to 3, wherein the output unit is configured to be able to output a sales state in which the energy is sold to the external energy supply engine.   The energy management apparatus according to any one of claims 1 to 4, wherein the external energy supply engine is a power supply engine, and the private energy generation apparatus is a cogeneration apparatus.   The energy management apparatus according to any one of claims 1 to 4, wherein the energy is electric power, and the private energy generation apparatus is a solar battery.

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