JP2003244841A - Method and system for providing information of hybrid system using secondary battery for power storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide structural specifications of a hybrid system according to presented conditions, in order to solve the problem that accurate information cannot be obtained easily of the structure of the hybrid system, which is watched for the effective use of natural energy. <P>SOLUTION: In providing information concerning the hybrid system making use of a generator and a secondary battery for power storage, an information providing part receives consumed power or load-power consumption patterns of a customer, intending to install the hybrid system and/or restricting conditions of its installation site. Based on these restricting conditions received, the rated generated output of a photovoltaic power generator or a wind-power generator that makes up of the hybrid system and/or the rated capacity of the secondary battery for power storage are computed or selected. Then, the effect of using the system is presented to the customer, including the effect of energy charge cut when adopting the hybrid system of structure. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the sale of hybrid systems and power storage secondary batteries for the purpose of expanding the spread of hybrid systems using solar power generators or wind power generators and power storage secondary batteries. And a system for providing information for promoting lending.

[0002]

2. Description of the Related Art Solar power generators and wind power generators are expected to be widely used as countermeasures against global environmental problems caused by the use of natural energy. These power generators have a problem that the output varies depending on weather and wind speed. As measures against this, for example, JP-A-11-69893, JP-A-9-72273, and JP-A 6-1.
As disclosed in Japanese Unexamined Patent Publication No. 33472, a hybrid that is connected to a power storage secondary battery and is connected to an electric power system, and this power storage secondary battery absorbs output fluctuations of a solar power generation device or a wind power generation device. A system has been proposed.

A substation near a city can be considered as a place to install this hybrid system, but a larger installation area is required for expanding the use, and a place as close as possible to a load used by a power consumer. It is preferable to install it in the same place to save transmission equipment. However, in order to use the electric power supplied from this hybrid system with a load installed in a building, retail store, housing complex, or a remote island, use a hybrid system with characteristics suitable for the power consumption pattern of the load. There is a need.

[0004]

The power consumption pattern of the load used by the power consumer or the power consumption pattern of the load supplied with power from the power supplier, or the rated generated power or power storage of the hybrid system suitable for the installation location. Conventionally, it was difficult to select the rated battery capacity of the secondary battery.
Therefore, there is a problem that the hybrid system is not effectively used. Furthermore, conventional information provision
In the (supply) method, even for electric power consumers and electric power suppliers who are already using solar power generation devices or wind power generation devices,
There has been a problem that it is difficult to select the rated battery capacity of the secondary battery for power storage that forms a hybrid system by combining it with the solar power generation device or the wind power generation device in use.

Further, there has been a problem that the utility effect of the hybrid system using the secondary battery for power storage is not clear to the power consumer or the power supplier. Of course, it is possible to solve this problem if the seller or lender of the hybrid system or the secondary battery for electric power storage goes to the above-mentioned electric power consumer or electric power supplier and has a detailed discussion. However, this increases labor costs and, as a result, makes the hybrid system expensive. There is also a problem that the merit of introducing the hybrid system is reduced.

[0006] This problem becomes a serious problem especially in the initial stage where the power consumer or the power supplier considers the use of the hybrid system. Since the number of target power consumers and power suppliers is relatively large in the initial stage, it is very costly to visit the power consumers and power suppliers for a meeting. For these reasons, especially in the initial stage, the above-mentioned power consumers and power suppliers are promoted to decide whether to use the hybrid system or to decide to use the secondary battery for power storage used in the hybrid system, and to reduce the cost. Reduction is an issue that is essential for the widespread expansion of hybrid systems.

The object of the present invention is, except for the above-mentioned drawbacks of the prior art, useful for electric power consumers and electric power suppliers to judge whether to use a hybrid system or to use a secondary battery for power storage used in a hybrid system. To provide such information. Specifically, a power storage system that provides appropriate hybrid system configuration specifications in response to information and inquiries from customers regarding the introduction of a hybrid system using a solar power generation device or a wind power generation device and a secondary battery for power storage. A method and system for providing information of a hybrid system using a secondary battery for use.

[0008]

The above problems can be solved by the following means. Method of receiving information from a customer regarding a hybrid system using a solar power generation device or a wind power generation device and a power storage secondary battery or a power storage secondary battery used in the hybrid system, and providing an optimum system configuration specification In the above, the information providing unit receives the power consumption or load power consumption pattern of the customer who is the target of the hybrid system or / and the constraint condition of the installation location, and the photovoltaic power generation that configures the hybrid system based on the received constraint condition. Device or wind power generator rated power generation and / or rated battery capacity of the secondary battery for power storage is calculated or selected, and the hybrid system or the power storage including the effect of reducing the power charge when the hybrid system is used in the above configuration Customer's secondary battery use effect is calculated together, customer It is characterized by presenting or transmitting.

[0009] Here, the customers include electric power consumers and electric power suppliers, and the power consumption or load power consumption pattern includes loads used by the electric power consumers or loads supplied by the electric power suppliers. Power consumption and power consumption patterns are targeted.

The calculation or selection of the rated power output and the rated battery capacity is performed by the daily power consumption amount or power consumption pattern obtained from the information on the power consumption and / or the area or height limitation of the installation place. From the information, calculate or select the rated power output of the solar power generation device or the wind power generation device or the rated battery capacity of the power storage secondary battery suitable for use, or the daily power consumption of the power consumption. Or the power consumption pattern and the predicted value of the generated power or the predicted value of the generated power of the solar power generation device or the wind power generation device or / and the information of the area or height limitation of the installation place, the secondary power storage It is characterized by calculating or selecting the rated battery capacity of the battery.

Regarding the utilization effect of the hybrid system or the secondary battery for storing electric power used in the hybrid system, the amount of reduction of the electricity charge is calculated by using the data of the electricity charge unit price and the basic electricity charge.
Reduction amount of the power charge, facility cost or facility depreciation cost of the hybrid system or the secondary battery for power storage and usage period or lease period, operating cost and maintenance / management cost of the hybrid system or the secondary battery for power storage Etc. to calculate the cost reduction effect when the hybrid system or the secondary battery for power storage is used, and present or transmit the information to the customer. The communication means for receiving the information from the customer and / or transmitting the information from the information providing unit is electronic mail or the Internet. In addition, the secondary battery for power storage is a sodium-sulfur battery, and the heater power consumption of the sodium-sulfur battery is calculated or predicted by using the information on the number of operation days of the sodium-sulfur battery and the temperature of the installation place. Calculating the power charge reduction amount including the heater power consumption amount and presenting or transmitting it to the customer. In addition, when the inquiry item from the customer includes the presence or absence of a request for operation, maintenance, management or remote monitoring of the hybrid system or the power storage secondary battery, in the case of the existence, the operation, maintenance, management or And / or the cost reduction effect is calculated including the cost required for remote monitoring, and is presented or transmitted to the customer.

Further, the information providing section relating to the hybrid system using the solar power generation device or the wind power generation device and the secondary battery for power storage stores the secondary system for power storage used in the hybrid system or the hybrid system via communication means. In an information providing system of a hybrid system that receives information from a customer regarding a battery and provides an optimum system configuration specification based on the information, the information providing unit is the power consumption or load power consumption of the customer who is the target of the hybrid system. Transmission / reception means for receiving a constraint condition of a pattern or / and an installation location, and a rated power generation or / and a power storage secondary battery of a solar power generation device or a wind power generation device which configures a hybrid system based on the received constraint condition. The rated battery capacity of the A processor for calculating a quantitative effects of utilization systems out or the power storage for a secondary battery is characterized in a system configured from a storage unit that stores in advance data necessary for the arithmetic processing.

Further, the storage means stores the power consumption standard pattern, power generation output and size data of the hybrid system, price data, data including power generation efficiency or / and battery capacity and size, price and life of the secondary battery for power storage. It is characterized in that it is a storage device that stores data about batteries including batteries.

Further, it is characterized in that the transmitting / receiving means is an electronic mail or the Internet.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration example of the information providing system of the present invention. FIG. 1 uses an information providing unit 10 relating to a hybrid system (hereinafter, abbreviated as HYB-S) that uses a solar power generation device or a wind power generation device and a secondary battery for power storage, and uses this information providing unit 10. The example of the whole structure of the customers 20a-20n is shown. The information providing unit 10 includes a seller, a lender, a manufacturer, an advertiser, etc. of the HYB-S or a secondary battery for storing power using the HYB-S. Power consumer or power supplier (hereinafter H
20a to 20n are HYB customers who purchase solar power generators and wind power generators or borrow them, or HYB customers who plan to use the hybrid system. I mean.
The information providing unit 10 uses the HYB-S for HYB-S.
Arithmetic processing based on information from customers 20a to 20n,
Provide information that meets the requirements of HYB customers.

The information providing unit 10 receives the reply information to the inquiry to the HYB customer and the request information from the HYB customer via the transmitting / receiving means 13 such as electronic mail or the Internet. Then, the data stored in the storage device 12 is used for calculation by the calculation processing device 11, and the result is provided to the HYB customer via the transmitting / receiving means 13 as information of the calculation result corresponding to the answer or request. . Reference numeral 19 denotes a display device on the information supply section (person) side 10, and 18 denotes the console. By using these, necessary information can be transmitted to the HYB customer, or the HYB customer and the answer can be confirmed.

In the terminal devices of the HYB customers 20a to 20n, 21a is a terminal side transmitting / receiving means of the customer 20a, which receives information from the information providing section 10 or transmits it to the information providing section 10. Reference numeral 14a is a display device, and 15a is an operation console. 20b to 20n have basically the same configuration. 2 is a communication line, which may be a wireless or wired communication line.

As the secondary battery for storing electric power for HYB-S, a sodium-sulfur battery, a lithium ion battery, a lead battery, a nickel hydrogen battery, a redox flow battery or the like can be used. Among these, the sodium-sulfur battery is particularly excellent as a secondary battery for power storage. The battery itself has advantages such as compact size and high energy density, excellent charge / discharge efficiency of the battery, and abundant constituent materials suitable for mass production. In addition, it can be installed in a building or an apartment house because it requires less installation space.
Furthermore, it is possible to configure a system that is most effective for load leveling in the power system.

On the information providing unit 10 side, the rated power output of the solar power generator or the wind power generator constituting the HYB-S and the rated battery capacity of the secondary battery for power storage are calculated and selected. In addition, the amount of power charge reduction when HYB-S is used, the cost reduction effect of the power consumer or the power supplier, and the like are calculated by using the data in the storage device 12.
Is calculated by. Then, through the transmitting / receiving means 13, HY
B Provide information to customers. The information providing unit 10 may prepare a home page so that the HYB customer can access it.

For HYB customers who have not yet used solar power generators or wind power generators, HYB-
For HYB customers who already have HYB-S or solar power generation equipment or wind power generation equipment, provide information regarding S to confirm the effect of the change in power consumption pattern and introduce it. It mainly provides information on existing systems, information on secondary batteries for power storage used in the systems, and information on efficiency improvement.

FIG. 2 shows an example of the structure of HYB-S. Reference numeral 50 is a control device for the entire HYB-S. It is composed of a microcomputer and controls the entire HYB-S. Reference numeral 52 is a power reception control device from the power system. It also controls the amount of power received or, in some cases, controls the transmission of surplus power to the grid side. 54 is a solar power generation device. Again 56
Is a wind turbine generator. Electric power is supplied to the load 60 from these. Reference numeral 58 denotes an electric power storage secondary battery, which supplies electric power to the load from the electric power storage secondary battery 58 when power shortage occurs with respect to the power consumption of the load from the power system or due to the outputs from 54 and 56. To supply.

The power storage secondary battery 58 is provided with a charge control device (charge CTR) or a discharge control device (discharge CTR) to control charge / discharge. Further, when surplus power is generated due to the relationship between the nighttime power, the photovoltaic power generation, or the wind power generation power of the power system and the load, these powers are effectively used to charge the power storage secondary battery 58. To do. Here, an example of the case where the solar power generator and / or the wind power generator is provided is shown, but either one of them may be provided,
In some cases, it may be combined with another power generator.

FIG. 3 shows an example of a HYB-S information providing method, and shows processing steps in the arithmetic processing unit 11. First, the arithmetic processing unit 11 of the information providing unit 10
Then, in S2, the information from the HYB customer side is received via the transmitting / receiving means 13. It is the answer information to the inquiry to the HYB customer and the request information from the HYB customer.
The area and height of the installation location of B-S, the power consumption information of the load used by the power consumer or the load supplied by the power supplier, and the introduction or the introduction of HYB-S based on these information It includes inquiries about system improvements. The information is roughly divided into S
It is divided into the power consumption information of No. 3 and the installation condition information of S6 (for the secondary battery for power storage used for HYB-S, refer to FIG. 11 described later).

As will be described in detail with reference to FIG. 4 in relation to S3, in S3a, in the case of the power consumption information obtained from S3, that is, as the power consumption information, the power consumption pattern or the power consumption of the load and In some cases, the information on the operating time is obtained, and in other cases, only the information on the purpose and area of the building is obtained. In the case of, the arithmetic processing of S4 is performed. On the other hand, in the case of S3a, the standard power consumption pattern is selected by the data D1 of the storage device 12, and S
4, the pattern is calculated from the standard data (S4
of).

The data is, for example, from D1, from the purpose (A to
C), data suitable for the area (a to c), for example, Ab, B
a or the like is selected. Then, in S4, the power consumption pattern is calculated and selected from the standard data Ab. The power consumption pattern itself will be described later. In S4, the power consumption information is obtained (S3a, D1), and based on this, the power consumption pattern and power consumption for one day are calculated or selected.

Here, if the information from the HYB customer is a measured value or an estimated value of a past or present power consumption pattern or a future planned power consumption pattern, these power consumption patterns can be used as they are. Further, if the information is about the type and quantity of the load, which determines the power consumption mainly, the power consumption, the operating time, etc., the power consumption pattern and the power consumption are estimated based on the information.

On the other hand, the information sent from the HYB customer is
In the case of information regarding the purpose of use of the load, or the area or purpose of use of a building or building, standard data (D1) of the power consumption pattern or power consumption corresponding to the purpose of use is stored. Using the standard data from the storage device 12 and the information from the HYB customer, the daily power consumption pattern and power consumption are calculated.

On the other hand, the installation condition information in S6 is information such as the area and height limitation of the installation place, an example of which is shown in step S6a of FIG. As shown in D2 of FIG. 5, it is shown that the rated power output A1 of the solar or wind power generator, the rated battery capacity B1 of the secondary battery for power storage, the area at that time is A, and the height is a. There is. With reference to these data, A1 and B2 are actually calculated or selected in step S7.

The calculation in S7 is calculation or selection of the rated power generation output and the rated battery capacity of the installable hybrid system. In this case, the rated power output and the rated battery capacity suitable for the inquired information are calculated, and the rated power output and the rated battery capacity are selected by comparing this with the HYB-S information that can be actually supplied. Is common.

Here, it is not impossible for the HYB customer to supply all the power consumption of the load supplying the power from the HYB-S. However, the power generated by the solar power generator and the wind power generator greatly varies depending on the weather conditions. In order to completely absorb this fluctuation, it is necessary to increase the capacity of the secondary battery for power storage. For this reason, it is practically desirable to supply a part of the power consumption from the hybrid system and receive the remaining power from the power system.

A general method is to perform a peak cut of the power consumption pattern and supply the peak-cut power amount, that is, the power consumption amount exceeding the peak cut position (level) from the HYB-S. Receiving the remaining amount of power, that is, the amount of power consumption below the peak cut level, mainly from the power system leads to effective utilization of HYB-S,
This is also a desirable form of utilization for leveling the load on the power system.

It is also possible to use a part of the capacity of the secondary battery for power storage as an emergency power source, an uninterruptible power source, a voltage stabilizing power source or a frequency stabilizing power source. By doing so, the utilization effect of HYB-S can be further enhanced.

FIG. 6 shows detailed steps S7a to S7c of step S7 of FIG. When the rated power generation output and the rated battery capacity are obtained based on the power consumption, the predicted power generation amount predicted from the rated power output of the solar power generation device or the wind power generation device and the weather information is calculated. Then, the sum of the discharge power capacity obtained from the rated battery capacity of the secondary battery for power storage and the solar power generation power amount and / or the wind power generation power amount is supplied from the HYB-S among the power consumption amounts. It becomes the electric energy. The rated power generation output and rated battery capacity at that time are S7
b, calculated or selected in S7c.

For this purpose, (D) and (E) in FIG.
That is, as shown in D6 and D7, in the storage device 12,
Store the annual weather information of the place where the HYB-S is installed, the change data of the amount of power generated by the solar power generator and the wind power generator based on this weather information, the power generation efficiency according to the weather conditions, and the efficiency of the converter. deep. Using these data, the arithmetic processing unit 11 calculates or selects the rated power generation output and the rated battery capacity for covering the above-mentioned supplied power amount in step S7c.

Now, the load power pattern is 1 in FIG.
00 (a-b-c to h-i-j). Figure 6
In S7c, the battery capacity is calculated. The power consumption 101 (b-cd-gh) of the peak cut position (level, for example, 110 of FIG. 8A) or higher is generated power = rated power generation output × power generation efficiency pattern. (Α of ex.D6
₀ ) × conversion efficiency (a in ex. D7), the amount of electric power (204a, 204b in FIG. 8B) exceeding the generated power (200 in FIG. 8B, P1-P2 to P9-h). ) H
It will be supplied from the secondary battery (rated battery capacity) for power storage provided in the YB-S.

In S7a, the peak cut position (level) is assumed to be level 110 in FIG. 8 (A). Based on these values, S8, S9, (S10) and S11 are calculated. In S8, the generated power 200 (FIG. 8 (B))
The predicted value 201 of the generated electric power by the time integration of
(B)), the rated battery capacity or discharge power amount 20
The charging / discharging electric energy is calculated from 4a and 204b (FIG. 8B).

In step S9, the amount of power charge reduction is calculated. On the other hand, in S10, the purchase cost or the borrowing cost is calculated from the rated power generation output and the rated battery capacity using the data of D4 (FIG. 7 (B)). Then, in S11, the cost reduction effect is calculated. For example, the calculation results of S9 and S10 and D5
The cost reduction effect is calculated from the data of (FIG. 7C), that is, the data relating to the period of use, equipment maintenance and repair costs, and the like.

In S11a, a judgment condition is determined based on the area and height restrictions of the facility location, whether or not the rated power output and the rated battery capacity found in S7 are satisfied and the cost reduction effect is maximum, and the judgment condition is not satisfied. When N, the process returns to S7b, and S7b, S7c, S8, S9 (S10), S11,
The step S11a is executed again. Then, if Y that satisfies the condition determination in S11a, it is determined whether or not there is a peak cut position (level) that maximizes the cost reduction effect in S11b.
In the case of ("present"), the process of S11c is executed. N
In the case of (“none”), the process returns to S7a and the peak cut level is changed to S7a to c, S8, S9, (S10),
Iterative calculation processing of S11, S11a, and S11b is performed.

In S11c, the rated power generation output and the rated battery capacity are determined, and in S11d, the power charge reduction amount and the cost reduction effect are determined. Then, the response information and the request information for the inquiry are sent through S12 of FIG.
Send to YB customer.

Further, the generated power of the solar power generator or the wind power generator fluctuates greatly, and the generated power of the solar power generator or the wind power generator during the HYB-S operation may become almost zero. In such a case, it is necessary to select the rated battery capacity so that the supplied power amount can be entirely covered by the discharged power amount of the power storage secondary battery. In addition, HYB-S is actually H
In order to be used by YB customers, in consideration of seasonal fluctuations of daily power consumption patterns and daily fluctuations, the rated generated power and the rated battery capacity are set to be slightly larger than the above calculated values, and the power supply of the hybrid system is supplied. It is desirable to have some margin in ability.

On the other hand, when the rated power generation output and the rated battery capacity are obtained based on the information on the area and height limitation of the installation place, the rated power generation output and the rated battery capacity and HY are calculated in S6a of FIG.
The storage device 1 stores the relationship with the B-S dimension data D2 (FIG. 5).
2 is stored in advance, and using this data, the rated power output and rated battery capacity of the HYB-S that can be installed by the arithmetic processing unit 11 are calculated or selected. Generally, it is necessary to install an AC / DC converter and its control device on the secondary battery for power storage, and when calculating the rated battery capacity of the secondary battery for power storage that can be installed, the AC / DC converter must be installed. It is also necessary to consider the dimensional data of the converter and controller.

Further, as generally used, when the power consumption of the load is AC, the solar power generator is provided with the orthogonal converter, and when the power consumed by the load is DC, it is converted into the wind power generator. Equipment needs to be installed. It is necessary to consider the dimension data of the control device which controls operation | movement of a solar power generation device or a wind power generation device with the dimension data of this converter. Although the installation area and height of the conversion device and the control device accurately change according to the maximum output, the change in installation area and height due to the output is relatively small. Therefore, it is also possible to make the installation area and height of these converters and controllers almost constant for calculation.

Further, when the value of the installation place area or height limit is sufficiently large, the installable rated power output and rated battery capacity of the HYB-S become too large considering the supplied power amount. In this case, the value obtained from the power supply amount is prioritized. On the other hand, due to the restrictions on the installation location, HY
If the installation area and height of B-S are small, HY depends on the rated power output and rated battery capacity obtained from the installation location.
B-S will be selected.

For the HYB customers 20a to 20n, the advantage of using the HYB-S is that the power cost is reduced.
Therefore, as described above, it is desirable to select the rated power generation output or the rated battery capacity that maximizes the cost reduction effect of the power consumer and the power supplier when the HYB-S is used. To do this, calculate the cost reduction effect for each by changing the rated power output and rated battery capacity in several stages, and select the optimum value based on these calculation results, or based on these data, It is desirable to consult with the HYB customer regarding the rated power output and rated battery capacity of the HYB-S to be used.

FIG. 8 will be described in detail. (A) ~
(C) is a secondary power storage device or a rated power output of a solar power generation device or a wind power generation device that constitutes a HYB-S suitable for use by a HYB customer, based on the amount of power consumption determined from the above-described power consumption pattern. It is an example in the case of calculating the rated battery capacity of the battery. In FIG. 8A, the vertical axis represents power consumption and the horizontal axis represents time. This figure is a diagram showing an example of the case where the power consumption is peak cut, and represents the power consumption of the load used by the power consumer or the load supplied from the power supplier. FIG. 8B shows the power supplied from the HYB-S (input from the power system including the power supply) when the peak cut level 110 is set in (A). FIG. 8C shows the power supplied from the power system (including the input from the HYB-S). Note that the power consumption illustrated in FIG. 8A corresponds to the total of a plurality of loads when there are a plurality of loads connected to the HYB-S.

Further, when the power consumption is peak cut as shown in FIG. 8A, the amount of power charge reduction due to the peak cut of the power charge paid to the power manufacturer owning the power system and the HYB-S equipment cost. The overall effect is determined by the cost reduction effects, including operating costs and operating costs. Therefore, as will be described later, the peak cut position (level) is determined so that the utilization effect of HYB-S is increased, and HYB-S is determined based on the peak cut position (level).
It is desirable to select the rated generated power of S and the rated battery capacity.

In FIG. 8A, the power consumption pattern 100 (a to j) of the load is the peak cut position (level).
The power consumption that is divided into two by 110 and exceeds the peak cut position (level) 110 is represented by b to h. In addition, the power consumption below the peak cut position 110 is ab-
It is represented by h-i-j. In addition, the power consumption curve 100
, The power consumption amount corresponding to the integrated value of one day that exceeds the peak cut position (level) 110 is 103, and the power consumption curve 1
The power consumption amount corresponding to the integrated value of 00 at the peak cut position (level) 110 or less for one day is 104.

In FIG. 8B, the power generated by the solar power generator or the wind power generator used for the HYB-S is 200 (p1-p2 to p9-h, thick line in FIG. 8B). The predicted value of the amount of generated electric power, which is the integrated value of electric power for one day, is 201 (for HYB-S). Although the power generated by HYB-S varies depending on the weather conditions, the power generated in this figure corresponds to the average power generation pattern of the power predicted from the annual weather conditions. In this figure, the generated power of the HYB-S changes with time in a considerably large cycle, but in reality, it also fluctuates in the order of minutes or seconds or less, so it is not shown in the figure. It is desirable for the use of HYB-S to absorb such short-cycle power fluctuations by charging and discharging the secondary battery.

Further, in FIG. 8B, the generated power 2
00 and power consumption 101 exceeding peak cut position 110
The difference from (b-c to g-h indicated by the one-dot chain line) is HYB-
It is the surplus power amount due to S, and is shown by 202a and 202b. By supplying this amount to the load, the amount of power supplied from the power system to the load can be reduced accordingly. Also,
The surplus power amount 203 corresponds to the surplus power amount exceeding the power consumption pattern 100 of the load, and the power may be sold to the power system.

On the other hand, the difference in the amount of power generated by subtracting the generated power 200 from the power consumption 101 exceeding the peak cut position 110 is 204a, 204b, and this amount of power is supplied from the power storage secondary battery to the load ( The specific control is HY in FIG.
B-S-CTR). Also, in this figure, the charging power amounts 302a and 302b of the secondary battery for power storage show the case of charging by the night power of the power system.
It is also possible to supply a part or all of the surplus power amounts 202a, 202b, and 203 of YB-S to the secondary battery for power storage and charge it. It is also possible to use, for example, the night-time generated power of the wind power generator for charging.

Further, in FIG. 8C, the amount of electric power and the amount of electric power supplied from the electric power system to the load are 30 and 30%, respectively.
0, 301, and nighttime electric energy supplied to the power storage secondary battery is 302a, 302b. In addition, the power consumption 102 below the peak cut position 110 used in the load
And the electric power 300 supplied from the electric power system, the electric power amount of the difference is 202a and 202b.
2b is supplied to the load from HYB-S as described above. The power supplied from the power system will be reduced accordingly. Furthermore, supply from HYB-S to the power grid (power sales)
The amount of electric power generated is indicated by 203 '.

When the power consumption of the load is alternating current as is generally used, the power generated by the photovoltaic power generator is the photovoltaic power generation output = (rated power generation output) × (power generation efficiency according to weather conditions) × (conversion DC / AC conversion efficiency of the device), the power generated by the wind power generator is wind power output = (rated power output) x (power generation efficiency according to weather conditions), or wind power output = (rated power output) x (depending on weather conditions) Power generation efficiency) x (efficiency of frequency converter) Discharge power of the secondary battery for power storage is discharge power = (rated battery capacity) x (average discharge voltage) x
(DC / AC conversion efficiency of the converter) is given by: On the other hand, when the power consumed by the load is DC, the DC / AC conversion efficiency of the conversion device is set to 1 in the solar power generation device or the secondary battery for power storage, and the generated power of the wind power generation device is set to the wind power generation output = It may be calculated as (rated power generation output) x (power generation efficiency depending on weather conditions) x (AC / DC conversion efficiency of the converter).

As described above, the power consumption is divided into two by the peak cut position (level) 110, and the power consumption 103 exceeding the peak cut position 110 is generated by the solar power generator or the wind power generator and the power storage. It can be covered by the discharge power of the secondary battery for use. In this case, the expected amount of generated power that is given by the product of the rated power output of the solar power generator or wind power generator and the power generation efficiency estimated from weather conditions is integrated within the peak cut time range to generate the amount of power generated. Calculate the expected value. Further, the discharge power amount is obtained from the rated battery capacity of the secondary battery for power storage, and the rated generated power and the rated battery capacity are calculated or calculated so that the sum of the two can cover the power consumption amount 103 that exceeds the peak cut position. Selected. That is,
In this case, since the rated power generation output and the rated battery capacity change depending on where the peak cut position 110 is set, the peak cut position is calculated so that the utilization effect of the hybrid system is maximized, and based on that, It is good to obtain the rated power output and rated battery capacity. Of course, the relationship with the electricity bill should be taken into consideration. A specific calculation process is performed according to FIG.

FIG. 9 shows the relationship between the power supplied from the HYB-S and the power consumption when the peak cut level 110 is changed. FIG. 9 (A) shows the load pattern 100 of FIG. 8 (A). FIG. 9B shows the relationship with the case of HYB-S1. Power consumption that exceeds the peak cut level 110 when the peak cut level is 110
1 (b-c to g-h) and the generated power 200 of the solar power generator and the wind power generator used for HYB-S1. In 204a and 204b, 101 is the generated power 200
It represents the amount of electric power that exceeds the electric power, and is the amount of electric power that must be supplied from the secondary battery for electric power storage.

On the other hand, FIG. 9C shows the case of HYB-S2, in which the generated power of HYB-S is small. The generated power 200 'is 200 (HYB-S in FIG. 9B).
It is 1/2 the output of 1). 101 is 200 '(dotted line)
It is understood that the amount of electric power that exceeds the value is 204c, and the amount of electric power supplied from the secondary battery for electric power storage is increased as compared with the case of HYB-S1 (FIG. 9B).

FIG. 9D shows that the peak cut level is 11
In the case of changing from 0 to 110 ′ (see FIG. 9A), the peak cut level 11 of the load power consumption is
The power consumption exceeding 0 'is 101'(b'-c to g-
h '). The amount of electric power which 101 'exceeded the generated electric power 200 of HYB-S1 is 204d, and this is the amount of electric power supplied to the load from the secondary battery for electric power storage. The output of HYB-S1 may be smaller than that in the case of FIG. 9 (B).

In FIG. 9E, the peak cut level is 11
0 ', when the generated power of HYB-S is changed to 200', the peak cut level 1 of the load power consumption
The power consumption exceeding 10 'is represented by 101' (same as in FIG. 9D). The amount of electric power which 101 'exceeded the generated electric power 200' of HYB-S2 is 204e, 204f,
This is the amount of power supplied from the secondary battery for power storage to the load. It can be seen that by changing the peak cut level in this way, the amount of power supplied from the power storage secondary battery to the load also changes (see the calculation flow in FIG. 6).

In some cases, the peak cut position 1
Regardless of 10, the secondary battery for power storage is discharged in a constant power pattern or a rectangular wave pattern according to the rated battery capacity, and this is combined with the generated power of the wind power generation device or the solar power generation device to load or load. And a control device HYB-S-CTR (50 in FIG. 2) so as to supply power to the power system.
It is also possible to control the operation of the HYB-S with. Also by doing so, it is possible to realize the effective use of natural energy by the solar power generation device or the wind power generation device, which is an advantage of HYB-S, and the load leveling of the power system based on the nighttime power usage by the secondary battery for power storage. . Also in this case, the rated power output and the rated battery capacity are calculated or selected so that the utilization effect of the hybrid system is increased.

Here, as shown in FIG. 8, the sum of the power generated by the solar power generator or the wind power generator and the discharge power of the secondary battery for power storage exceeds the peak cut position 110. HYB-S so that it does not fall below power 101
Can also be controlled to supply power. In that case,
The utilization effect of HYB-S is increased. By supplying the surplus power amounts 202a and 202b of HYB-S to the load and supplying the surplus power amount 203 to the power system, H
The effect of using YB-S is further improved.

Furthermore, by charging the secondary battery for power storage with the night-time power of the power system, there is an advantage that the load leveling of the power system is promoted and the utilization effect of HYB-S is improved. Note that it is also possible to charge the secondary battery for power storage by using the surplus power of the solar power generation device or the wind power generation device that constitutes the HYB-S, and as a result, it is possible to bring about an improvement in the utilization rate of natural energy. .

Strictly speaking, the relationship between the discharged power amount of the power storage secondary battery and the rated battery capacity that determines the size of the power storage secondary battery is the constant current or constant current of the power storage secondary battery. Calculated using power charge / discharge characteristics.

FIG. 10 shows an example of charge / discharge characteristics of a sodium-sulfur battery. The vertical axis represents the battery voltage, the horizontal axis represents the discharge capacity, the lower solid line represents the discharge voltage, the upper solid line represents the charge voltage, and the broken line represents the electromotive force. Here, the discharge power W (t) which is the output at time t is given by the equation (1). W (t) = η × [E−I (t) × R] × I (t) (1)

Further, η is the DC / AC conversion efficiency of the AC / DC converter, E is the electromotive force of the battery, I is the battery current, R is the battery resistance at the time of discharging, and E−I (t) × R is discharged. Hit the voltage. In the case of a DC load, η in the equation (1) may be set to 1. In addition, the discharge power amount is the time integrated value (∫
W (t) dt), the battery capacity is the time integrated value of the battery current (∫
I (t) dt).

Further, when a sodium-sulfur battery is used as the secondary battery for power storage, as shown in FIG. 10, when the discharge capacity on the horizontal axis exceeds a predetermined value, the battery electromotive force E is increased according to the discharge capacity. descend. Therefore, when the power amounts 204a and 204b in FIG. 8 are covered by the discharge power amount, the discharge power at each discharge time obtained by subtracting the generated power 200 from the power consumption 101 exceeding the peak cut position 110 is used.
The required rated battery capacity is obtained by obtaining the battery current at each discharge time from the electromotive force obtained from FIG. 10, the battery resistance at the time of discharge, and the equation (1), and integrating this battery current within the range of the discharge time. Should be calculated.

In this way, the accurate relationship between the discharged power amount and the battery capacity can be obtained, and the exact calculation is performed by the arithmetic processing unit 11. At this time, the value of the electromotive force, the value of the discharge voltage, or the value of the battery resistance shown in FIG. 10 for each discharge capacity is stored in the storage device 12 in advance. Alternatively, the electromotive force and the discharge voltage in FIG. 10 may be function-approximated and used for the calculation. On the contrary, when the value of the discharged power amount is accurately obtained from the battery capacity, the same calculation as the above may be performed using the equation (1).

When the battery is used under the condition that the electromotive force and the discharge voltage shown in FIG. 10 are constant, there is an advantage that this calculation can be easily performed. Furthermore, since the average value of the discharge voltage is high, the battery capacity for supplying the same amount of discharge power is small. As a result, as will be described later, there is an advantage that the amount of electric power to be charged is reduced and the amount of reduction in electricity charges is increased. On the other hand, if the battery is used up to the region where the electromotive force in FIG. 10 decreases with the discharge capacity, the range of use of the battery is widened and the number of batteries (the number of batteries) for supplying the amount of discharge power can be reduced.

Instead of the above calculation, the average value of the discharge power may be obtained by using the operation pattern of the battery shown in FIG. 8 or the operation pattern such as constant power operation or trapezoidal operation.
The average value of the discharge voltage is calculated from the relationship between the average value of the discharge power and FIG. 10, and this discharge voltage is used in place of E−I (t) × R in the equation (1) to calculate the discharge power amount and the battery capacity. You can also ask for a relationship. This method has the advantage that the calculation is simplified and the rated battery capacity is easily calculated from the required discharge power amount.

Next, based on the rated power output and the rated battery capacity calculated or selected in S7 of FIG. 3, the expected power generation amount of the solar power generator or the wind power generator and the secondary battery for power storage are calculated in S8. Calculate the charge and discharge electric energy. In addition, when the rated power output and the rated battery capacity are obtained based on the power consumption and the power consumption pattern in S7, the expected power generation amount and the discharge power amount have already been obtained. Can be used. In addition, when the rated power output and rated battery capacity are required due to the restrictions on the area and height of the installation location, the estimated power generation amount and the estimated power generation amount can be calculated using equation (1) and weather information as described above. It suffices to calculate the discharge power amount.

On the other hand, equation (2) is used to calculate the amount of charging power from the battery capacity. W ′ (t) = 1 / η ′ × [E + I (t) × R ′] × I (t) (2)

Note that W '(t) is the charging power at each time t,
η'is the conversion efficiency of the converter from AC to DC, and R'is the battery resistance during charging. Here, when the electric power used for charging is DC, η'is 1. Further, the charging power amount is given by a time integral value (∫W ′ (t) dt) of charging power at each time, and the battery capacity is given by a time integral value of battery current (∫I (t) dt).

Further, charging is usually performed by setting a constant current, and in this case, the charging current value is calculated from the value of the rated battery capacity previously obtained in S7 and the charging time.
Charge voltage (E + I)
(t) × R ′) is obtained, and the charging electric energy is calculated using the above equation (2). Further, the average value of the charging voltage is obtained using the data of FIG. 10, and this is calculated as (E + I (t) ×
Instead of R ′), the amount of charging power may be easily obtained from the battery capacity. In order to simplify the calculation of the amount of charging power, the battery efficiency is calculated, and the battery system efficiency is calculated by multiplying this by the conversion device efficiency (η × η ′),
The charging power amount may be calculated by dividing the previously calculated discharging power amount by this battery system efficiency.

As shown in FIG. 10, when the battery is used in a range where the electromotive force of the battery is constant, the average value of the discharge voltage increases, so that the battery for supplying a predetermined amount of discharge power is used. There is an advantage that the capacity is reduced, and as a result, the amount of charging power is reduced, and the amount of reduction of the electricity charge is increased as described later. Further, in the sodium-sulfur battery, if the battery is used within a range where the electromotive force decreases, the battery life tends to be shortened due to the corrosion of the positive electrode container. It is preferable to use batteries.

The predicted generated power amount and the charged / discharged power amount thus obtained, and / or the predicted generated power amount, which is given by the product of the rated power generation output and the predicted power generation efficiency, and the unit price of electric power and the basic electric power. Using the charge value (D3 of the storage device, FIG. 7), the reduction amount of the power charge is calculated in S9 of FIG.

The electric power charge is generally the basic charge determined by the peak value of the electric power used and "the amount of electric power used × electric power unit price".
It is the sum of the power usage rate determined by and the unit price of electricity is cheaper at night compared to daytime. Therefore, as shown in the example of the peak cut by the generated power and the discharged power shown in FIG. 8, the use of HYB-S reduces the basic electricity charge due to the effect of reducing the peak value of the power supplied from the daytime power system. , HYB-S also has the effect of reducing the power charge based on the amount of power generated and the amount of power charged to the secondary battery at night.

That is, the reduction amount Δ of the power charge used in the daytime by the load is given by the equation (3). Δ = Electric power basic charge difference + Daytime power charge unit price x (Generated power amount + Discharge power amount)-(Nighttime power charge unit price x Charged power amount) (3)

Here, the value of (generated power amount + discharged power amount) in the equation (3) is the surplus power amount 203 shown in FIG. When the power is supplied to the grid and the power charge is supplied from the power grid based on the daytime power charge unit price, the sum of the generated power amount predicted value 201 and the power amounts 204a and 204b in FIG. 8 is obtained. Further, in this case, the amount of charging power is 302a302b as the amount of nighttime power supplied from the power grid. On the other hand, when the surplus power amount 203 is not supplied to the power system, (3)
The value of (generated power amount + discharged power amount) in the equation is the sum of the power consumption amount 103 of the load exceeding the peak cut position 110 and the surplus power amounts 202a and 202b. In this case, the surplus power amount 203 is used to charge the secondary battery for power storage,
It is desirable to reduce the amount of charging power in the equation (3). Further, when the unit price of electric power when the surplus power amount 203 is supplied to the power system is different from the unit price of daytime electric power in the formula (3), the formula (3) is modified in consideration of this.

Further, depending on the operating conditions of the hybrid system and the contract with the electric power manufacturer, the power usage charge obtained from the generated power amount estimated value or the charge / discharge power amount, or the peak cut due to the generated power estimated value or the discharged power peak value, etc. In some cases, only one of the basic charges calculated from the location etc. may be reduced. On the other hand, when a part or all of the charging power is covered by the power generated by the solar power generator or the wind power generator,
The part related to this is removed from the equation (3). Also,
When electric power is used even at night due to the load, the electric power charge is reduced by the nighttime electric power and the nighttime electric power amount supplied from the hybrid system, for example, the generated electric power and the generated electric power amount of the wind turbine generator.

In the case of the sodium-sulfur battery, a heater is provided to keep the battery temperature at 300 ° C. or higher. Therefore, it is necessary to subtract the power consumption charge of the heater from the equation (3) to obtain the reduction amount of the power charge. The power consumption of the heater varies depending on the operation pattern of the battery, and increases as the number of days of operation stoppage and the ambient temperature are lower. For this reason, information about the number of days of shutdown of the sodium-sulfur battery, and / or information about the temperature of the installation location, etc. are included in the inquiry in S2 of FIG. It is particularly effective to calculate or predict the power consumption of the heater using this information and to calculate the power charge reduction amount in S9 of FIG. 3 including this power consumption charge in order to improve the accuracy of the power charge reduction amount. desirable.

Here, the amount of power charge reduction is generally calculated in units of one month or one year. To this end, it is necessary to consider the number of operating days of the hybrid system, and in some cases, power consumption. It is necessary to consider seasonal changes in the amount of electricity and the amount of power generated. Furthermore, depending on the contract with the electric power manufacturer, the amount of reduction in the electric power charge may be determined by the change in the amount of electric power consumption or the peak value of the electric power consumption. In this case, the unit price of electric power or the basic electric power charge is used.
The amount of reduction in electricity charges is required. Further, the reduction amount of the electric power charge can be calculated in consideration of the discounted charge and the fuel adjustment amount set by the electric power manufacturer.

Furthermore, when the same amount of power is supplied from the HYB-S to the load, the HYB-S is operated so that the peak value of the power supplied from the power system is as small as possible, so that the difference in the basic power tariff is reduced. As a result, the amount of electricity cost reduction is generally the largest. Therefore, FIG.
Power consumption that exceeds the peak cut position 110 shown in 10
By operating so as to cover 1 (b-c to g-h) with HYB-S, the utilization effect of HYB-S can be maximized. The reduction amount of the power charge in the operation pattern in FIG. 8 is the “power supply amount × daytime power charge unit price” from the HYB-S, the power basic charge and the peak cut determined from the peak value of the power consumption pattern 100 of the load. Position 1
It is calculated by the difference from the basic power charge determined from 10, and the amount of charging power supplied from the power system × night power charge unit price.

Next, using the rated power output and the rated battery capacity and the HYB-S price data (D4) calculated or selected in S7 of FIG. 3, the HYB-S equipment costs and equipment depreciation costs are obtained. . And HYB customers 20a-n are HYB-
The cost for purchasing or borrowing S is calculated (S10 in FIG. 3). It should be noted that the purchase cost and the borrowing cost need to include the price of the conversion device and the control device and the cost required for the transportation and installation of the HYB-S. Furthermore, regarding the borrowing cost of HYB-S, it is necessary to consider the borrowing period described later.

Next, the reduction amount of the electric power charge (S9 in FIG. 3) obtained as described above, the purchase cost or borrowing cost of the HYB-S (S10 in FIG. 3), the life of the HYB-S, the warranty period, etc. By using the usage period or the borrowing period of the power consumer or the power supplier (D5), the cost reduction effect of the power consumer by using HYB-S is calculated (S11 in FIG. 3). In addition, the cost reduction effect of the power consumer or the power supplier and the cost reduction effect of the power supplier are basically the same content.
It means the cost reduction effect when the power consumer receives the use effect of YB-S and the profit effect when the power supplier receives the effect.

Here, the HYB customers 20a-n are HYB-.
When purchasing S, the amount of annual power cost reduction-initial investment cost x interest rate is the annual cost reduction amount, and the total amount of cost reduction exceeds the initial investment cost when used until a certain year and month. The amount of cost reduction thereafter becomes the cost reduction effect of the power consumer or the power supplier. On the other hand, HYB customers are HY
When borrowing B-S, "Annual electricity charge reduction amount-
The “borrowing cost” is the annual cost reduction effect. Since the borrowing cost generally changes when the borrowing period changes, the borrowing cost of the HYB-S may be calculated based on the desired borrowing period sent from the power consumer or the power supplier. Further, the cost reduction effect may be calculated by using the borrowing cost of each borrowing period with the borrowing period as a parameter.

In some cases, the usage cost of the HYB-S is calculated in consideration of the maintenance and repair costs of the HYB-S equipment. Then, the cost reduction effect is calculated based on this. When part of the capacity of the secondary battery for power storage is used as an emergency power supply, an uninterruptible power supply, a voltage stabilization power supply, a frequency stabilization power supply, etc., the cost reduction effect of using HYB-S is also included. Will be calculated. Also, HYB
When the HYB customers 20a to 20n outsource the operation, maintenance, and management of S to another person such as the information providing unit (person) 10, the value obtained by subtracting the operation, maintenance, and management costs is the power consumer or the power supplier. The cost reduction effect is.

The HYB-S is capable of automatic operation, and maintenance / management is performed by the information supply unit (person) 10, that is, H
It is possible for the YB-S seller or manufacturer to perform remote monitoring. As a result, as a power consumer and a power supplier, operation, maintenance, and management can be avoided, and maintenance and management are performed by specialists, so that the reliability of HYB-S is improved and the spread of HYB-S is widespread. Expands.

In particular, when a sodium-sulfur battery is used as a secondary battery for storing electric power, it is necessary according to the current law that a person who is qualified as a hazardous material handler perform operation, maintenance and management, or remote monitoring. , HYB customer himself HYB-
This is a bottleneck when operating, maintaining and managing S. On the other hand, when the seller or the manufacturer remotely monitors the HYB-S for automatic operation, it is easy to select qualified personnel or engineers, and more than one HYB-S can be selected by the same qualified personnel or engineers. Remote monitoring has the advantage that the number of persons in charge of remote monitoring can be reduced, and as a result, operating, maintenance and management costs can be reduced.

Therefore, in the case of the HYB-S using the sodium-sulfur battery as the secondary battery for power storage, although not shown, the HYB customers 20a to 20n can be operated, maintained and managed, and / or remotely monitored. Inquire in S2 of FIG. 3 whether there is a request for, and if there is a request,
It is desirable to calculate the cost reduction effect or profit effect in S11 including the cost required for operation, maintenance / management or / and remote monitoring. By doing so, correct operation in compliance with the law is possible, the reliability and safety of the HYB-S are improved, and the power consumer and the power supplier do not have to take responsibility for maintenance and management. -Use of S becomes easy.

Further, also in the HYB-S using the secondary battery for electric power storage containing no dangerous substances, it is desirable to perform the maintenance / management by remote monitoring in order to facilitate the use by the HYB customer. In this case Similarly to the above, HYB
The customers 20a to 20n are requested to inquire about operation, maintenance and management, and / or remote monitoring. If there is a request for a request, the cost reduction effect including operation, maintenance and management costs and remote monitoring costs is calculated.

Finally, the transmitting / receiving means 13 transmits / receives the information about the rated power output and the rated battery capacity of the HYB-S calculated or selected in this way, the information about the power charge reduction amount, and / or the information about the cost reduction effect. By HY
By sending to the B customers 20a to 20n (S12), it is possible to ask the HYB customer about the purchase or borrowing of the hybrid system. In order to make it easier for the HYB customer to make a decision, it is desirable to send the information on the cost reduction effect together with the information on the rated power generation output and the rated battery capacity. Furthermore, it is possible to send information on the amount of reduction in electricity charges and information on the purchase cost or borrowing cost of HYB-S instead of the cost reduction effect. It is especially desirable to send information such as.

FIG. 11 is a flow chart collectively showing the process of the information providing method of the secondary battery for power storage used for HYB-S. Those denoted by the same reference numerals as those in FIG. 3 indicate similar contents. In FIG. 11, HYB customers who have already used solar power generators or wind power generators
It proposes the use of a secondary battery for storing electric power for constructing -S. Basically, information about the secondary battery is calculated and provided according to the flow of FIG. Step S2 '
Then, H using a solar power generator or a wind power generator
The area and height of the installation location of the secondary battery for power storage existing under the YB customer and the constraint conditions for future installation are transmitted via the transmitting / receiving means 13. The rated power output may be used as the information about the power generated by the solar power generator or the wind power generator. However, in order to improve the accuracy of the rated battery capacity of the secondary battery for power storage suitable for HYB-S, the generated power pattern indicating the actual situation of the generated power, the measured value of the generated power amount, or the measured average of the generated power is measured. A value is desirable.

Next, the power consumption information returned from the power consumer or the power supplier is obtained (S3), and based on this information, the power consumption pattern, and the standard data (D1) of the power consumption, one day A power consumption pattern and power consumption are calculated (S4).

In S5, the generated power or rated power output information of the solar power generator or the wind power generator sent from the HYB customers 20a to 20n is obtained. The rated battery capacity of the secondary battery for power storage used for the HYB-S suitable for use in S7 ′ based on the power consumption amount or power consumption pattern determined from the power consumption information and the generated power or rated power output information Calculate or select. Furthermore, information on the area and height limitation of the installation place is obtained (S6), and the rated battery capacity of the installable power storage secondary battery is determined using the dimension data (D2 ') of the power storage secondary battery. Calculate or select (S7 '). At this time, it is common to calculate the rated battery capacity suitable for the returned information and compare it with the information on the secondary battery for power storage that can be actually supplied to select the rated battery capacity. Is.

Here, in order to calculate or select the rated battery capacity of the secondary battery for power storage based on the information on the consumed power, the generated power, or the rated power output, the same method as described in FIG. 8 and FIG. 10 is used. be able to. It is also possible to mainly discharge the secondary battery for power storage in a constant power pattern or a rectangular wave pattern, or to charge and discharge it so as to absorb fluctuations in the generated power of the wind power generation device or the solar power generation device. .

In any of these cases, it is desirable to calculate or select the rated battery capacity so that the utilization effect of the secondary battery for power storage will be large. In addition, a part of the capacity of the secondary battery for power storage can be used as an emergency power supply or an uninterruptible power supply, or a voltage-stabilized power supply or frequency-stabilized power supply to enhance the effect of using the secondary battery for power storage. It is possible.

Further, when the rated battery capacity is calculated based on the power consumption, the predicted value of the generated power amount or the measured value of the generated power amount predicted from the rated power generation output of the solar power generation device or the wind power generation device and the weather information. And the rated battery capacity is calculated or selected so that the sum of the discharge power capacity obtained from the rated battery capacity of the secondary battery for power storage covers the amount of power supplied from the HYB-S in the amount of power consumption. It In addition, the fluctuation of the generated power of the solar power generator and the wind power generator is large,
When a state in which the generated power of the solar power generation device or the wind power generation device that is operating BS is almost zero often occurs, the amount of discharge power of the secondary battery for power storage is all It is desirable to set the rated battery capacity so that it can cover.

On the other hand, when the rated battery capacity is obtained based on the information on the area and height limitation of the installation place, the relationship between the rated battery capacity and the dimension data (D2 ') of the secondary battery for power storage is stored in the storage device. Stored in advance in 12, and using this data,
It is desirable to calculate or select the rated battery capacity that can be installed by the arithmetic processing unit 11.

When the area of the installation place and the value of the height restriction are sufficiently large, the rated battery capacity of the installable secondary battery for storing electric power becomes too large in consideration of the supplied electric power. In this case, the value calculated from the amount of power supplied above is given priority.On the other hand, if the installation area or height of the secondary battery for power storage is small due to restrictions on the installation location, the rated battery capacity calculated from the installation location The secondary battery for power storage is selected according to the above.

Since the advantage of using the secondary battery for power storage for the HYB customers 20a to 20n is to reduce the power cost, select the rated battery capacity that maximizes the cost saving effect of the power consumer or the power supplier. Is desirable. For this purpose, the rated battery capacity is changed in several stages, the cost reduction effect is calculated for each, and the optimum value is selected based on these calculation results.

In this way, the secondary battery for power storage is combined with the solar power generation device or the wind power generation device to obtain HYB-S.
By configuring the above, the utilization effect of the solar power generation device or the wind power generation device is enhanced, and natural energy can be effectively used. In addition, by charging the secondary battery for power storage with the night power of the power system, it is possible to reduce the daytime power supply amount of the power system and increase the nighttime power supply amount, promote load leveling, and It is possible to obtain an advantage that the utilization rate of the power generation device and the power transmission and transformation device configuring the above is improved.
In addition, it is also possible to charge the secondary battery for power storage by using the surplus power of the solar power generation device or the wind power generation device, and as a result, the utilization rate of natural energy can be improved.

Next, as shown in FIG. 11, the charge / discharge power amount of the secondary battery for power storage is calculated based on the rated battery capacity calculated or selected in S7 '(S8'). In addition, S
When the rated battery capacity is calculated based on the power consumption amount and the power consumption pattern in 7 ′, the value can be used because the discharge power amount is obtained. Further, when the rated battery capacity is obtained from the area or height of the installation place, the discharge power amount may be calculated using the equation (1) as described above.

On the other hand, the charging power amount can be calculated by the equation (2). Further, in order to simplify the calculation of the charging power amount, the average value of the charging voltage is obtained by using the data shown in FIG. 10, and this is replaced with “E + I (t) × R ′” in the equation (2). Using this, the amount of charging power can be obtained from the battery capacity. Furthermore, the battery efficiency due to charging / discharging is calculated using the battery characteristics shown in FIG. 10, and the efficiency of the conversion device (η ×
The battery system efficiency multiplied by η ′) may be obtained in advance, and the previously obtained discharge power amount may be divided by this battery system efficiency to obtain the charging power amount.

If the electromotive force of the battery is used within a certain range, the average value of the discharge voltage becomes high and the battery capacity for supplying a predetermined amount of discharge power becomes small, resulting in charging. Power consumption is reduced. Therefore, as described later, there is an advantage that the amount of reduction of the electricity bill increases. Further, in the sodium-sulfur battery, if the battery is used within a range where the electromotive force decreases, the battery life tends to be shortened due to the corrosion of the positive electrode container. It is preferable to use batteries.

By using the charge / discharge power amount thus obtained, and the value of the power charge unit price or the power basic charge, (D
3) Calculate the amount of reduction of the electricity charge by using the secondary battery for electricity storage (S9). Here, the reduction amount Δ of the power charge used in the daytime by the load is given by the equation (4). Δ = Basic electricity charge difference + Daytime electricity charge unit price × Discharged electricity amount − Nighttime electricity charge unit price × Charged electricity amount (4)

Here, depending on the operating conditions of the secondary battery for power storage and the contract with the electric power maker, the power consumption calculated from the charge / discharge power amount, or the power basic value calculated from the peak cut position by the discharge power peak value, etc. In some cases, only one of the charges may be reduced. In the case of sodium-sulfur batteries, a heater is provided to maintain the battery temperature at about 300 ° C or higher, so it is necessary to subtract the power consumption charge of the heater from equation (4) to obtain the reduction amount of the power charge. There is. The power consumption of the heater varies depending on the operation pattern of the battery, and increases as the number of days of operation stoppage and the ambient temperature are lower. For this reason, the information of the number of days of operation stop of the sodium-sulfur battery and / or the information of the temperature of the installation place is included in the inquiry of S2 ′. Then, the power consumption of the heater is calculated or predicted using this information, and the power charge reduction amount is calculated in S9 including this power consumption charge. By doing so, it is possible to improve the accuracy of the amount of reduction of the electricity charge.

Furthermore, when the same amount of power is supplied from the power storage secondary battery to the load, the power storage secondary battery is operated so that the peak value of the power supplied from the power system is as small as possible. As a result, the difference in the basic electricity charges becomes large, and the reduction amount of the electricity charges is generally the largest. Therefore, as shown in FIG. 8, the power consumption 101 exceeding the peak cut position 110 is HYB-using a solar power generation device or a wind power generation device and a secondary battery for power storage.
By operating so as to be covered by S, the utilization effect of the secondary battery for power storage is maximized.

Next, the rated battery capacity calculated and selected in S7 'and the price data (D
4 ') is used to calculate the facility cost and facility depreciation cost of the power storage secondary battery, and calculate the cost for the HYB customers 20a to 20n to purchase or borrow the power storage secondary battery. (S10 '). It should be noted that the purchase cost and the borrowing cost need to include the price of the conversion device and the control device, and the cost required for transportation and installation of the secondary battery for power storage.

Next, the reduction amount of the power charge (S9) obtained as described above, the purchase cost or the borrowing cost (S10 ') of the power storage secondary battery, the life of the power storage secondary battery, and the warranty period. The use effect of the secondary battery for power storage is calculated using the usage period obtained from the above or the borrowing period of the power consumer or the power supplier (D5 ′). That is, the cost reduction effect of the power consumer by using the secondary battery for power storage is calculated (S1
1). The cost reduction effect of the power consumer and the cost reduction effect of the power supplier are basically the same, and the cost reduction effect and the power supply when the power consumer receives the effect of using the secondary battery for power storage. It means the profit effect when the person receives.

Here, when the HYB customers 20a to 20n purchase the secondary battery for power storage, the annual cost reduction amount is "amount of annual reduction of electric power charge-initial investment cost x interest rate".
The total amount of cost reductions exceeds the initial investment cost when used up to a certain year, and the amount of cost reduction thereafter becomes the cost reduction effect of the electricity consumer or the electricity supplier.

On the other hand, when the power consumer or the power supplier borrows the secondary battery for power storage, the annual “power charge reduction amount−borrowing cost” is the annual cost reduction effect. Since the borrowing cost generally changes when the borrowing period changes, the borrowing cost of the power storage secondary battery is calculated based on the desired borrowing period sent from the power consumer or the power supplier. Alternatively, the cost reduction effect may be calculated by using the borrowing cost of each borrowing period with the borrowing period as a parameter.

[0110] Here, the secondary battery for power storage can be automatically operated, and maintenance / management is performed by the information providing unit (person) 10,
That is, it is possible for a seller, a manufacturer, or the like to perform remote monitoring. As a result, the power consumer and the power supplier are spared the trouble of operation, maintenance, and management, and the maintenance and management are performed by a specialist, so that the reliability of the secondary battery for power storage is improved.

Finally, information on the rated battery capacity of the secondary battery for power storage calculated or selected in this way,
The transmission / reception unit 13 transmits the information about the amount of reduction of the electricity charge or / and the information about the cost reduction effect to the HYB customers 20a to 20n (S12 ′).

As described above, according to the configurations shown in FIGS. 1, 3 and 11, HYB- is transmitted via the transmitting / receiving means 13, 21a-n.
In addition to supplying information about the S or secondary battery for power storage, the inquiry information regarding the power consumption or load power consumption pattern and the restrictions on the installation location is sent to the HYB customer, and the information obtained from the HYB customers 20a to 20 Then, by using the arithmetic processing unit 11 and the storage device 12 as necessary, information regarding HYB-S suitable for the HYB customer is calculated and selected, and the information is presented and transmitted to the HYB customer.
Further, by such a method, it becomes possible to sell or rent a HYB-S or a secondary battery for storing electric power.

Furthermore, according to the present invention, by transmitting information through the communication means, it is possible for HYB customers to select HYB-.
Since the effect of S or secondary battery for power storage becomes clear,
There is an advantage that it is possible to accurately determine whether or not to introduce the system. In addition, personnel costs for selling and renting HYB-S or secondary batteries for power storage are reduced, so HYB
There is a great merit for HYB customers that purchase costs and borrowing costs of S or secondary battery for power storage are reduced.

As a result, the spread of HYB-S becomes possible, and it becomes possible to deal with global environmental problems by effectively utilizing natural energy. In addition, by using the secondary battery for power storage, the night-time power is effectively used and the load leveling is achieved. The utilization rate of power generation equipment and transmission and transformation equipment has improved,
The advantages of the electric power manufacturer who owns the electric power system can also be obtained.

Furthermore, by automatically operating the HYB-S and performing maintenance / management by remote monitoring,
As a customer, it is possible to save the trouble of operation, maintenance and management. Further, by utilizing the system of the present invention, H
The YB customers 20a to 20n have HYB-S based on the cost reduction effect.
You can decide whether to use, and you can choose to purchase or borrow.

[0116] As described above, since it is possible to make a contract for selling or renting HYB-S by exchanging information by communication means,
The number of times sellers and manufacturers go to power consumers can be reduced, and labor costs are reduced, resulting in HYB-
The advantage is that the purchase cost and borrowing cost of S are reduced. Further, there are advantages that the utilization of natural energy is promoted, and the load leveling improves the utilization rate of power generation facilities and transmission and transformation facilities.

[0117]

By utilizing the information providing system of the hybrid system according to the present invention, by presenting the constraint condition for the use of the hybrid system or the secondary battery for power storage used in the hybrid system, it is possible to meet the condition. The configuration specifications of the hybrid system can be obtained. In addition, as a result, the spread of hybrid systems will become possible and the use of natural energy will be promoted.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of an information providing system of a power storage secondary battery used for HYB-S or HYB-S of the present invention.

FIG. 2 is a diagram showing a configuration example of a HYB-S of the present invention.

FIG. 3 is a flowchart showing a HYB-S information providing method of the present invention.

FIG. 4 is a partial detailed view of the flow chart of FIG.

5 is a partial detailed view of the flow diagram of FIG.

6 is a partial detailed view of the flow diagram of FIG.

FIG. 7 is a diagram showing an example of stored data of a storage device.

FIG. 8 is a diagram showing an example of a power consumption pattern and an output of HYB-S.

9 is a diagram showing an example of a relationship between a power consumption pattern, a peak cut level, and an output of YHB-S in FIG.

FIG. 10 is a diagram showing charge / discharge characteristics of a secondary battery for power storage.

FIG. 11 is a flowchart for providing information on a secondary battery for power storage used in HYB-S.

[Explanation of symbols]

2; communication line 10; information providing unit (person) 11; arithmetic processing device 12; storage device 13, 21a to 21n; transmission / reception means 14a to 14n, 19; display means 15a to 1
5n, 18; Operation consoles 20a to 20n; Hybrid system customer (HYB customer) 50; Hybrid system control device (HYB-S-CTR) 52; Power reception control device (power transmission and reception control) from the power system 5
4; Photovoltaic power generator 56; Wind power generator 58; Secondary battery 60 for power storage; Load 100; Power consumption pattern, 110; Peak cut position (level).

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koji Kusakabe             3-1-1 Sachimachi, Hitachi City, Ibaraki Prefecture Stock Association             Hitachi, Ltd. Nuclear Business Division (72) Inventor Minoru Kobayashi             3-1-1 Sachimachi, Hitachi City, Ibaraki Prefecture Stock Association             Hitachi, Ltd. Nuclear Business Division F-term (reference) 5F051 BA14 JA17 JA20                 5G066 AA02 AA04 AE05 HB06 HB09                       JA03 JB03 KB01 KB03

Claims (9)

[Claims] 1. An information providing unit relating to a hybrid system using a solar power generation device or a wind power generation device and a power storage secondary battery, wherein the information storage unit uses the hybrid system or the power storage secondary battery used in the hybrid system via communication means. Receives information from customers regarding the use of the next battery,
In an information providing method for a hybrid system that provides an optimum system configuration specification based on the information, the information providing unit determines a power consumption or load power consumption pattern of a customer who is a target of the hybrid system or / and a constraint condition of an installation location. Receiving and calculating or selecting the rated battery capacity of the photovoltaic power generator or the wind power generator constituting the hybrid system or the rated battery power of the secondary battery for power storage based on the received constraint condition, A secondary battery for power storage, characterized in that it calculates the combined use effect of the hybrid system or the secondary battery for power storage including the effect of reducing the power charge when using the hybrid system, and presents or transmits it to the customer. Information provision method of the used hybrid system. 2. The calculation or selection of the rated power generation output and the rated battery capacity according to claim 1, wherein the daily power consumption or power consumption pattern or / and the area of the installation place obtained from the information on the power consumption. Or the height limitation information, the calculation or selection of the rated power output of the solar power generation device or the wind power generation device or the rated battery capacity of the power storage secondary battery suitable for use, or 1 of the power consumption Based on the daily power consumption or power consumption pattern and the predicted power generation value or the predicted power generation amount of the solar power generation device or the wind power generation device or / and information on the area or height limitation of the installation location, A method for providing information of a hybrid system using a secondary battery for power storage, characterized in that a rated battery capacity of the secondary battery for power storage is calculated or selected. 3. In the claim 1, regarding the utilization effect of the hybrid system or the secondary battery for power storage, the amount of power charge reduction is calculated by using data of a power charge unit price and a basic power charge. In both cases, the electricity charge reduction amount and the facility cost or facility depreciation cost of the hybrid system or the power storage secondary battery and the use period or the borrowing period, the operating cost and maintenance of the hybrid system or the power storage secondary battery, A hybrid using a power storage secondary battery characterized by calculating a cost reduction effect at the time of using the hybrid system or the power storage secondary battery by using a management cost or the like, and presenting or transmitting it to a customer. System information provision method. 4. The power storage secondary battery according to claim 1, wherein the communication means for receiving the information from the customer and / or transmitting the information from the information providing unit is an electronic mail or the Internet. How to provide information on the existing hybrid system. 5. The heater of the sodium-sulfur battery according to claim 1, wherein the secondary battery for power storage is a sodium-sulfur battery, and the information on the number of days of operation stoppage of the sodium-sulfur battery and the temperature of the installation place is used. Information on a hybrid system using a secondary battery for electric power storage characterized by calculating or predicting power consumption, calculating the power charge reduction amount including the heater power consumption, and presenting or transmitting to the customer How to provide. 6. The method according to claim 1, wherein when the inquiry item from the customer includes a request for operation, maintenance / management or remote monitoring of the hybrid system or the secondary battery for power storage, the case of the presence Information on a hybrid system using a secondary battery for power storage, characterized in that the cost reduction effect is calculated including the cost required for the operation, maintenance / management, and / or remote monitoring, and is presented or transmitted to the customer. How to provide. 7. An information providing unit relating to a hybrid system using a solar power generation device or a wind power generation device and an electric power storage secondary battery, wherein the information storage unit uses the hybrid system or the electric power storage battery used in the hybrid system via a communication means. Receives information from customers regarding the use of the next battery,
In an information providing system of a hybrid system that provides an optimum system configuration specification based on the information, the information providing unit determines a power consumption or load power consumption pattern of a customer who is a target of the hybrid system or / and a constraint condition of an installation location. The transmitting / receiving means for receiving, and the rated power output of the solar power generation device or the wind power generation device or / and the rated battery capacity of the secondary battery for power storage, or the hybrid system or the above, based on the received constraint condition. An arithmetic processing unit for calculating a quantitative effect by using the secondary battery for power storage,
An information providing system of a hybrid system using a secondary battery for power storage, comprising: a storage unit that stores in advance data necessary for the arithmetic processing. 8. The storage device according to claim 7, wherein the storage means includes a power consumption standard pattern, power generation output and size data of a hybrid system, price data, data including power generation efficiency, or /
And information provision of a hybrid system using a secondary battery for power storage, which is a storage device for storing battery data including battery capacity, size, price and life of the secondary battery for power storage system. 9. The information providing system according to claim 7, wherein the transmitting / receiving means is an electronic mail or the Internet.