JP7002428B2 - Supply and demand adjustment power provision system - Google Patents

Description

The present invention relates to a supply and demand adjusting power providing system provided with a storage battery for providing the supply and demand adjusting power.

In order to curb CO ₂ emissions, it is necessary to increase the ratio of renewable energy such as solar power generation and wind power generation instead of fossil fuels as an energy source to supply power. If the thermal power generators are disengaged, the ability to supply regulatory power to stabilize the grid will decline in response to fluctuations in demand. On the other hand, each renewable energy generator may be equipped with a storage battery for mitigating fluctuations in its own power generation value. Since the storage battery capacity is designed for the situation where the fluctuation of the wind power generation value is the most severe, the capacity of the storage battery remains unused during the period when stable power generation can be performed depending on the season and the weather. Therefore, if the capacity of this storage battery can be utilized as an adjusting power, it can contribute to system stability.

As a prior art for contributing to system stability, for example, there is an invention described in Patent Document 1. Patent Document 1 discloses a method of adjusting the supply and demand of electric power among electric power consumers and devices in a predetermined area while considering the electric power supplied from the distributed power source.

International Publication No. 2012/147155

Fluctuation mitigation storage batteries owned by wind power generators can be effectively utilized by not only satisfying the volatility mitigation requirements of renewable energy, but also by providing storage battery capacity for ancillary services (supply and demand adjustment capacity). None of the prior art documents has clarified the details of charge / discharge control of the storage battery that achieves both the fluctuation mitigation of wind power generation and the provision of power for adjusting power and secures the life through the assumed period used for the fluctuation mitigation. Therefore, there is a risk that the storage battery will deteriorate before the expected storage battery usage period due to the provision of adjustment power, and it will not be possible to provide adjustment power or mitigate fluctuations.

Therefore, it is an object of the present invention to realize flexible supply and reception of electric power from a site having a power generation function and a charging function to an electric power system.

In order to solve the above-mentioned problems, in the first invention, the adjustment power provision command value of the storage battery of each said site is set so that the total charge / discharge of the storage batteries installed at one or more sites becomes the adjustment power required value. In the supply / demand adjusting power providing system that calculates and commands the storage battery of each site, the supply / demand adjusting power providing system is an integrated value of the adjusting power provided by the storage battery of each site at each time. And, the index calculation unit that receives the upper limit of the adjustment power provision integrated value and calculates the adjustment power provision integration index of the storage battery of each said site, the capacity of the storage battery of each said site, the charge / discharge amount, and the charge at each time. Based on the supply and demand adjustment power possible amount calculation unit that calculates the supply and demand adjustment power possible amount of the storage battery of each said site, the adjustment power required value, the adjustment power provision integration index, and the supply and demand adjustment power possible amount. The supply and demand adjusting power providing system is characterized by comprising a supply and demand adjusting power command calculation unit for calculating the adjusting power providing command value of the storage battery of each of the above-mentioned sites.

The second invention is a renewable energy power generation having a function of receiving an output upper limit command value, a charge / discharge command value, and a supply / demand adjusting force command value from a command center and suppressing the generated power below the output upper limit command value. The machine, the storage battery system that charges and discharges the storage battery according to the charge / discharge command value and outputs the current charge rate, the total value of the output upper limit command value and the charge / discharge command value, and the supply / demand adjustment force command value is subtracted. A power converter that distributes to the first electric power and the second electric power according to the supply / demand adjusting force command value, a first electric power meter that measures the first electric power, and a second electric power that measures the second electric power. It is a supply and demand adjustment power providing system equipped with a power meter.
Other means will be described in the form for carrying out the invention.

According to the present invention, it is possible to realize flexible supply and reception of electric power from a site having a power generation function and a charging function to an electric power system.

It is a figure which shows the example of the structure of the command center which concerns on 1st and 2nd Embodiment. It is a figure which shows the example of the structure of the renewable energy generator system which concerns on 1st Embodiment. It is explanatory drawing of the calculation method of the storage battery rechargeable value which concerns on 1st Embodiment. It is a graph which showed the example which calculates the charge / discharge capacity of a storage battery from SOC. It is a flowchart which shows the process of the command center which concerns on 1st and 2nd Embodiment. It is a figure which shows the example of the structure of the renewable energy generator system which concerns on 2nd Embodiment. It is explanatory drawing of the calculation method of the storage battery rechargeable value which concerns on 2nd Embodiment. It is a figure which showed the example of the structure of the command center which concerns on 3rd Embodiment. It is a graph of the explanation concerning the charge / discharge required amount of the 3rd Embodiment. It is a flowchart which shows the process of the command center which concerns on 3rd Embodiment.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the respective figures and mathematical formulas.
<< First Embodiment >>
FIG. 1 is a diagram showing an example of a configuration of a command center according to the first and second embodiments.
Here, a command center 200 (hereinafter referred to as a command center 200) for renewable energy power generation with a storage battery according to the first and second embodiments, and one or more wind power generators that form a group to provide supply and demand adjustment power. An example of sites 1000a to 1000c is shown. Here, as an example of renewable energy, wind power generation will be described. In addition, the adjustment power for grid stability shall be provided by the electricity transaction for the supply and demand adjustment power. Hereinafter, when each wind power generation site 1000a to 1000c is not distinguished, it is described as a wind power generation site 1000.

The command center 200 has a start time ts and an end time te for providing the supply and demand adjustment power, and a supply and demand adjustment power integration upper limit Wh _A (ID _WF , ts, te) that can be provided by the wind power generation site 1000 with the number ID _WF during this period. ) And the storage battery capacity Cc (ID _WF ) of each wind power generation site 1000 is set. Further, the command center 200 sets the supply / demand adjustment power integration Wh _SUM (ID _WF , t) of each wind power generation site 1000 after the start time ts at time t and the charge rate SOC (ID _WF , t) of the storage battery at each wind power generation site. Receive from 1000. Further, the command center 200 receives the weather information Wi (ID _WF , t) of each wind power generation site 1000 and the demand-supply adjustment power required value Wr (t), and uses these values to supply and demand adjustment power to each wind power generation site 1000. W (ID _WF , t), storage battery charge / discharge command value Co (ID _WF , t), and wind power output upper limit command value Wo (ID _WF , t) are calculated and transmitted to each wind power generation site 1000.

The upper limit of the integrated supply and demand adjustment power Wh _A (ID _WF , ts, te) is used to secure the life of the fluctuation mitigation storage battery installed at each wind power generation site 1000. The life of the storage battery is determined by the number of cycles, and the number of cycles can be converted by how many times the supply and demand adjustment power integrated Wh _SUM (ID _WF , t) corresponds to the storage battery capacity. The storage batteries for fluctuation mitigation installed at each wind power generation site 1000 include not only the supply and demand adjustment power W (ID _WF , t) required in a single-time cross section and the supply and demand adjustment power integration Wh _SUM (ID _WF , t). It is the capacity of Wh _SUM (ID _WF , t) that integrates the supply and demand adjustment power required to secure the life of the storage battery throughout the equipment usage period such as 20 years. Therefore, if the supply and demand adjustment power is provided by focusing only on the supply and demand adjustment power W (ID _WF , t) required in the single-time cross section and the supply and demand adjustment power integration Wh _SUM (ID _WF , t), the main purpose is to mitigate fluctuations. It shortens the period that can be used. Therefore, by giving the supply and demand adjustment power integrated upper limit value Wh _A (ID _WF , ts, te) and providing the supply and demand adjustment power W within this range, the life of the storage battery for fluctuation mitigation is secured for an assumed period.

As shown in FIG. 1, each wind power generation site 1000a to 1000c has a supply / demand adjusting force W (ID _WF , t), a storage battery charge / discharge command value Co (ID _WF , t), and a wind power output upper limit command value Wo from the command center 200. In response to (ID _WF , t), the charge rate SOC (t + 1) of the storage battery and the integrated supply and demand adjustment power Wh _SUM (ID) are obtained from the actual wind power fluctuation mitigation result and charge / discharge amount after controlling the wind turbine and storage battery according to the command value. _WF , t + 1) is calculated and sent to the command center 200. Further, the wind power generation site 1000a winds on the power line 1100a according to the supply / demand adjusting force W (ID _WF , t), the storage battery charge / discharge command value Co (ID _WF , t), and the wind power output upper limit command value Wo (ID _WF , t). The electric power sold as power generation is sent to the power line 1200a as the supply / demand adjusting power W. The same applies to the wind power generation sites 1000b and 1000c. The electric power of the power lines 1200a to 1200c sold as the supply and demand adjustment power W is summed up to be the supply and demand adjustment power W that generates power with respect to the demand and supply adjustment power required value Wr (t) received by the command center 200. The supply and demand adjustment power W is a positive W value at the time of an up transaction, but is a negative W value at the time of a down transaction. The configuration of each wind power generation site 1000a to 1000c will be described later with reference to FIGS. 2 to 3.

Hereinafter, the configuration of the command center 200 will be described. The progress index calculation unit 201 has a start time ts and an end time te for providing the supply and demand adjustment power, and an upper limit value Wh _A (ID _WF , ts) for integrating the supply and demand adjustment power that can be provided by the wind power generation site 1000 with the number ID _WF during this period. , Te) and the demand-supply adjustment power integration Wh _SUM (ID _WF , t) of each wind power generation site after the start time ts for Wh _A (ID _WF , ts, te) _. According to the progress of _WF (t), how much capacity is available to provide the supply-demand adjustment power W? The index Is (ID _WF , t) for accumulating the adjustment power provision is calculated.

Is (ID _WF , t) = (Wh _A (ID _WF , ts, te) -Wh _SUM (ID _WF , t))
/ Wh _A (ID _WF , ts, te) ... (1)

However, Is (ID _WF , t): Index Wh _A (ID _WF , ts, te): Supply and demand adjustment power integration upper limit Wh _SUM (ID _WF , t): Supply and demand adjustment power integration

Here, the index Is (ID _WF , t) is defined by the equation (1), but the supply and demand adjustment power integration Wh _SUM (ID _WF , t) and the supply and demand adjustment power integration upper limit Wh _A (ID _WF , ts). , Te) may be defined by the difference. The closer the index Is (ID _WF , t) is to 1, the more supply and demand adjustment power is available, and the closer it is to 0, the less power is available. The progress index calculation unit 201 sends the index Is (ID _WF , t) to the supply and demand adjustment force command calculation unit 204.

The fluctuation mitigation calculation unit 203 receives the weather information Wi (ID _WF , t) of each wind power generation site 1000, and predicts the wind power generation predicted value Wf (ID _WF , t) of each wind power generation site 1000 at time t. Further, the fluctuation mitigation calculation unit 203 calculates the chargeable / dischargeable amount Ca of the storage battery from the charge rate SOC (ID _WF , t) of the storage battery and the storage battery capacity Cc (ID _WF ), and within the range of the chargeable / dischargeable amount Ca of the storage battery. , Calculate the charge / discharge amount Cio (ID _WF , t) of the storage battery and the upper limit value W1t (ID _WF , t) of the wind power generation output required to comply with the fluctuation mitigation requirements. Here, the fluctuation mitigation requirement includes a configuration in which each device is controlled so that the difference between the maximum value and the minimum value of the power generation value within a fixed time frame is within a predetermined range. The predetermined range is, for example, 10% of the installed capacity of wind power generation. If the charge rate SOC (ID _WF , t) of the storage battery is close to 100%, the rechargeable amount will be small, and if it is close to 0%, the dischargeable amount will be small. Becomes scarce. The fluctuation mitigation calculation unit 203 inputs the charge / discharge amount Cio (ID _WF , t) of the storage battery to the supply / demand adjustment power possible amount calculation unit 202, and the wind power output upper limit command value Wo (ID _WF , t) to the supply / demand adjustment power command calculation unit 204. To send.

Explain the fluctuation mitigation requirements. In the data storage unit (not shown) of FIG. 1, the history of the past wind power generation values of each wind power generation site 1000 is stored. The fluctuation mitigation calculation unit 203 calculates the upper limit value W1t (ID _WF , t) and the lower limit value W1b (ID _WF , t) after fluctuation mitigation of each wind power generation site 1000 using this value.
The supply / demand adjustment capacity calculation unit 202 calculates the charge / discharge possible amount Ca (ID _WF , t) of the storage battery from the charge rate SOC (ID _WF , t) of the storage battery and the storage battery capacity Cc (ID _WF ), and alleviates the fluctuation. Using the charge / discharge amount Cio (ID _WF , t) of the storage battery received from the calculation unit 203, the amount Wn (ID _WF , t) that can provide the adjustment power of the supply and demand of each wind power generation site 1000 is calculated. The supply and demand adjustment power possible amount calculation unit 202 sends the adjustment power provisionable amount Wn (ID _WF , t) to the supply and demand adjustment power command calculation unit 204.

The supply / demand adjustment power command calculation unit 204 uses the index Is (ID _WF , t) and the adjustment power provisionable amount Wn (ID _WF , t) to satisfy each wind power generation satisfying the supply / demand adjustment power requirement value Wr (t). The supply and demand adjustment force W (ID _WF , t) of the site 1000 and the storage battery charge / discharge command value Co (ID _WF , t) are calculated, and the wind power output upper limit command value Wo (ID _WF , t) received from the fluctuation mitigation calculation unit 203. At the same time, it is sent to the SOC adjustment charge / discharge calculation unit 205. These supply and demand adjusting power W (ID _WF , t) and the storage battery charge / discharge command value Co (ID _WF , t) are the adjustment power providing command values of the storage battery of each wind power generation site 1000.

The supply and demand adjustment power command calculation unit 204 includes an ID sort unit 204-1 and a sort order allocation unit 204-2. The ID sorting unit 204-1 receives the index Is (ID _WF , t) and determines the priority of the wind power generation site in descending order of the index, that is, in order of having the capacity to provide the supply and demand adjustment power. The ID sort unit 204-1 sends the priority of the wind power generation site 1000 to the sort order allocation unit 204-2. The sort order allocation unit 204-2 arranges that the sum of the allocated adjustment power provisionable amount Wn (ID _WF , t) becomes the supply / demand adjustment power requirement value Wr (t) in the order of priority of the wind power generation site 1000. A value less than or equal to the adjustable amount that can be provided Wn (ID _WF , t) is assigned to the wind power generation site 1000 of the number ID _WF , and the required charge / discharge amount Cio of the storage battery is calculated. The sort order allocation unit 204-2 has the calculated supply / demand adjustment force W (ID _WF , t), the storage battery charge / discharge command value Co (ID _WF , t), and the wind power output upper limit command value Wo received from the fluctuation mitigation calculation unit 203. (ID _WF , t) is sent to the SOC adjustment charge / discharge calculation unit 205. If the sum of the adjustment power that can be provided before allocation Wn (ID _WF , t) is smaller than the supply and demand adjustment power requirement value Wr (t), the sum of the adjustment power that can be provided before allocation Wn (ID _WF , t) Allocate up to the upper limit and finish the process. Even if there is only one wind power generation site 1000, the supply and demand adjustment power can be allocated in the same way, and if the index Is (ID _WF , t) of one of the wind power generation sites 1000 is 0 or less, the supply and demand adjustment is performed. Does not provide power. As a result, the allocation of the supply and demand adjusting power of the wind power generation site 1000 having the index Is (ID _WF , t) of 0 or less becomes 0, and the life of the storage battery of the wind power generation site 1000 can be set as planned.

If the supply and demand adjusting force W (ID _WF , t) is provided, the storage battery deteriorates due to charging and discharging of the storage battery, but the supply and demand adjusting force W (ID _WF , t) should be calculated using the index Is (ID _WF , t). Therefore, the deterioration due to the supply and demand adjustment ability can be kept within the expected range, and the expected life of the storage battery in line with the business plan of each wind power generation site 1000 can be secured.

The SOC adjustment charge / discharge calculation unit 205 receives the charge rate SOC (ID _WF , t) of the storage battery, checks whether it is within the predetermined SOC upper limit (ID _WF ) and SOC lower limit (ID _WF ), and checks whether it is within the range of the predetermined SOC upper limit (ID WF) and SOC lower limit (ID WF). If it is out of the range, the storage battery charge / discharge command value Co (ID _WF , t) and the fluctuation mitigation Wm (ID _WF , t) are corrected so that they are closer to the range. If they are not out of the range, they are left as they are. The SOC adjustment charge / discharge calculation unit 205 inputs the calculated supply / demand adjustment force W (ID _WF , t), the storage battery charge / discharge command value Co (ID _WF , t), and the wind power output upper limit command value Wo (ID _WF , t). Send to wind power site 1000. Make the correction as follows. At this time, using the upper and lower limit values of fluctuation mitigation of each wind power generation site 1000 and the charge / discharge possible amount Ca (ID _WF , t) calculated by the supply / demand adjustable amount possible amount calculation unit 202, the following is performed.

Charging rate of storage battery SOC (ID _WF , t) <SOC lower limit (ID _WF ): In order to raise the SOC, charge the battery if it is in a chargeable condition. The conditions under which charging is possible are shown in the equation (2).

Wm (ID _WF , t)> Wmb (ID _WF , t) ... (2)

However, Wm (ID _WF , t): Fluctuation mitigation Wmb (ID _WF , t): Fluctuation mitigation lower limit

Since the fluctuation mitigation Wm (ID _WF , t) decreases when charging, it is necessary to satisfy the fluctuation mitigation requirements even if it decreases. If the storage battery charge / discharge command value Co (ID _WF , t) is charged, the formula (3) )become that way.

Ca (ID _WF , t)> Co (ID _WF , t) ... (3)

However, Ca (ID _WF , t): chargeable / dischargeable amount Co (ID _WF , t): storage battery charge / discharge command value

If the storage battery charge / discharge command value Co (ID _WF , t) is charging, the smaller value on the right side of equation (2) and the right side of equation (3) is charged, and if not, the right side of equation (2) is charged. Since it is possible, the value is added to the storage battery charge / discharge command value Co (ID _WF , t), and the value is subtracted from the fluctuation relaxation Wm (ID _WF , t) to correct the value.

Charging rate of storage battery SOC (ID _WF , t)> SOC upper limit (ID _WF ): In order to lower the SOC, discharge if the conditions allow discharge. The conditions under which the battery can be discharged, and the method of correcting the storage battery charge / discharge command value Co (ID _WF , t) and the fluctuation mitigation Wm (ID _WF , t) are performed in the same way as for charging.
By providing the SOC adjustment charge / discharge calculation unit 205, it is possible to continue to provide the adjustment power to supplement the power from the wind power generation to the storage battery when the adjustment power requirement is biased to the up transaction or the down transaction for a long time. can.

Hereinafter, the configuration and operation of the wind power generation site 1000a will be described with reference to FIGS. 2 to 3. The same applies to the configurations of the other wind power generation sites 1000b and 1000c. FIG. 2 is a diagram showing an example of the configuration of the renewable energy generator system according to the first embodiment. FIG. 3 is an explanatory diagram of a method for calculating a rechargeable battery chargeable value according to the first embodiment.
In this embodiment, the supply and demand adjustment ability is a contract that can be provided regardless of the fluctuation mitigation requirements. It is considered that this contract will be used when the provision of adjustment power is prioritized even if the frame of the fluctuation mitigation requirement is out of the range when the interconnection line capacity to which the wind power generation site 1000 is connected has a margin. On the other hand, when the interconnection line capacity to which the wind power generation site 1000 is interconnected is insufficient, it is considered that the supply and demand adjustment ability is provided within the range of the fluctuation mitigation requirement, which will be described later in another embodiment. ..

FIG. 2 shows an example of the wind power generation site 1000.
The wind power generation site 1000 is in accordance with the supply / demand adjusting force W (ID _WF , t) received from the command center 200, the storage battery charge / discharge command value Co (ID _WF , t), and the wind power output upper limit command value Wo (ID _WF , t). The generated power is output to the power system 2000. As a result, the electric power W1 sold as wind power generation satisfies the imposed fluctuation mitigation requirements. The wind power generation site 1000 sends the electric power W1 to be sold as wind power generation via the power line 1100, and sends the electric power W2 to be sold as a supply / demand adjusting force via the power line 1200.

The wind power generation site 1000 includes power meters 9, 10 and 11, a power converter (BTB: Back-to-back) 8, a control unit 300, a storage battery system 3, a wind power generation facility 2, and an integrated receiving adjustment force. A unit 4 is provided. The wind power generation site 1000 is connected to the power system 2000 via the power converter 12.
The power meter 10 is installed on the wind power generation site 1000 side from the confluence of the power lines 1100 and 1200, and measures the power W1 sold as wind power generation. The power meter 10 is connected to the wind power generation facility 2 via the power lines 101 and 103 and the power converter 13. Further, the power meter 10 is connected to the storage battery system 3 via the power lines 101 and 104 and the power converter 14.

The power meter 11 is installed on the power converter 8 side from the confluence of the power lines 1100 and 1200, and measures the power W2 sold as a supply / demand adjusting force. The power meter 11 is connected to the power converter 8 via the power line 102. The reason why the watt-hour meter 11 is necessary is to distinguish between the electric power W1 sold as wind power generation and the electric power W2 sold as supply and demand adjusting power. In particular, even if the demand for supply and demand adjustment power is lowered, consideration will be incurred, but in order to prevent the amount of power W2 sold as supply and demand adjustment power and the amount of power W1 sold as wind power generation from being lost in the power measurement only after the summation. be.

The power converter 8 has a function of dividing the power flow, and includes transformers 15 and 16, an AC / DC converter 17, and a DC / AC converter 18. One of the power converters 8 is connected to the power converter 12 via the power lines 102 and 1200, and the other is connected to the power lines 101, 103 and 104. The DC / AC converter 18 operates by receiving a receiving adjustment force W from the control unit 300.

The wind power generation facility 2 is a facility that receives wind and generates power according to the wind power output upper limit command value Wo (ID _WF , t), and is connected to the power converter 12 via the power converter 13 and the power lines 103, 101, 1100. Will be done. The wind power generation of the wind power generation facility 2 is power generation in the case of wind power generation without being subjected to output suppression. The wind power generation facility 2 receives a wind power output upper limit command value Wo (ID _WF , t) from the control unit 300. When the wind power generation value is larger than the wind power output upper limit command value Wo (ID _WF , t), the wind power generation facility 2 suppresses the generated power so that the generated power becomes the wind power output upper limit command value Wo (ID _WF , t). do. If the wind is weak and the wind power generation value is smaller than the wind power output upper limit command value Wo (ID _WF , t), power is generated at the wind power generation value. The electricity meter 9 measures the electric power generated by the wind power generation facility 2. The wind power generation is a value predicted as a wind power generation predicted value Wf (ID _WF , t) at the command center 200.

The storage battery system 3 has one or more storage batteries (not shown), a power exchanger for converting the charge / discharge into alternating current, and SOC detection that measures or estimates and outputs the charge rate SOC (State of charge) of the storage battery. It consists of parts. The SOC detection unit may be provided in the control unit 300 instead of the storage battery system 3. The storage battery system 3 receives the storage battery charge / discharge command value Co (ID _WF , t) received from the command center 200 and charges / discharges. Depending on the SOC status, charging / discharging as instructed may not be possible. If the charge rate SOC is 100%, charging is not possible, and if the charge rate SOC is 0%, discharge is not possible. Therefore, the storage battery system 3 measures or estimates the charge rate SOC of the storage battery from the voltage value and the charge / discharge history up to that point, and outputs the value to the command center 200.

At the wind power generation site 1000, the electric power W1 sold as wind power generation outputs the supply and demand adjustment power to the electric power line 1200 to the electric power system or receives from the electric power system while satisfying the imposed fluctuation mitigation requirements. In the command center 200, in order to achieve both the requirement for easing fluctuations and the provision of supply / demand adjustment power, the supply / demand adjustment power W (ID _WF , t), the storage battery charge / discharge command value Co (ID _WF , t), and the wind power output upper limit command value Wo (ID). Since the _WF , t) is calculated and sent, the control unit 300 receives the command value in the information receiving unit 5 and sends the command value to the power converter 8, the storage battery system 3, and the wind power generation facility 2. The control unit 300 sends the supply / demand adjusting force W (ID _WF , t) to the power converter 8 that divides the tide, sends the storage battery charge / discharge command value Co (ID _WF , t) to the storage battery system 3, and wind power output upper limit command value. Wo (ID _WF , t) is sent to the wind power generation facility 2.

The power converter 8 that divides the power flow transfers the power specified as the supply / demand adjusting power W (ID _WF , t) from the power of the wind power generation facility 2 and the storage battery system 3 output via the power line 103 and the power line 104 to the power line 102. Divide. The power converter 8 includes a transformer 15 on the connection side to the power line 102 and a transformer 16 on the connection side to the power line 104. Either the transformer 15 or the transformer 16 must be provided in either of them. Since the power lines 101, 102, and 105 form a loop, the zero-phase path is cut off by the transformer 15 or the transformer 16. As a result, stable operation can be achieved and noise diffusion can be prevented.

FIG. 3 is an explanatory diagram of a method for calculating a rechargeable battery chargeable value according to the first embodiment.
With reference to FIG. 3, a method of calculating the supply and demand adjustment power possible amount _WA (ID _WF , t) calculated by the fluctuation mitigation calculation unit 203 and the supply and demand adjustment power possible amount calculation unit 202 of the command center 200 will be described. Hereinafter, the description will be made with the number ID _WF of the wind power generation site 1000 omitted. FIG. 3 shows an example of the power generation value of the wind power generation site 1000.

The horizontal axis of the first graph in FIG. 3 is time. The vertical axis of the first graph is the power generation output, and indicates the output value W1o measured by the power meter 10. For the sake of simplicity, in this figure, the power value measured by the power meter 11 for power trading is set to 0. The horizontal axis of the second graph of FIG. 3 is the time, the vertical axis is the output value of the storage battery system 3, and the discharge has a positive value and the charge has a negative value. The horizontal axis of the second graph of FIG. 3 is the time, and the vertical axis is the charge rate of the storage battery included in the storage battery system 3. The time on the horizontal axis of each graph in FIG. 3 is the same time.

The output value W1o measured by the power meter 10 shown in the first graph of FIG. 3 is subject to fluctuation mitigation requirements for interconnection to the power system, and the fluctuation mitigation requirements are the maximum and minimum values for n minutes. The difference is L or less. The first graph shows an upper limit value W1t and a lower limit value W1b, which are allowable ranges of the output value W1o for satisfying the fluctuation mitigation requirement at each time.

The wind power generation value is the wind power generation predicted value Wf (t) predicted by the fluctuation mitigation calculation unit 203. Within the range of the chargeable / dischargeable amount Ca of the storage battery, the charge / discharge amount Cio (ID _WF , t) of the storage battery required to comply with the fluctuation mitigation requirement and the upper limit value W1t (ID _WF , t) of the wind power generation output are calculated. The charge / discharge value, the output upper limit command value, and the W2 output command value are calculated from the wind power generation predicted value Wf (t) so that the upper limit value W1t ≧ output value W1o ≧ lower limit value W1b. The wind power generation value and the wind power generation predicted value Wf (t) are shown as the predicted value. At time t1, the output value W1o (t1) = the wind power generation value Wf (t1), and the wind power generation value Wf is equal to or less than the upper limit value W1t and the lower limit value W1b or more even if there is no charge / discharge from the storage battery. .. At time t2, the wind power generation value Wf falls below the lower limit value W1b, so that the output value W1o becomes the same as the lower limit value W1b by discharging from the storage battery, and the requirement is satisfied. At time t3, the wind power generation value exceeds the upper limit value W1t, so that the output value W1o becomes the same as the upper limit value W1t by charging the storage battery, and the requirement is satisfied.

When the storage battery is discharged, the charge rate SOC of the storage battery decreases as shown in the third graph, and when the storage battery is charged, the charge rate SOC of the storage battery increases. Further, due to the terminal voltage constraint of the storage battery, the storage battery rechargeable value Xc and the storage battery dischargeable value Xd change according to the SOC. The supply and demand adjustment force command calculation unit 204 calculates the storage battery chargeable value Xc and the storage battery dischargeable value Xd from the SOC.

The first graph of FIG. 3 shows the storage battery rechargeable value Xc and the storage battery dischargeable value Xd according to the SOC value at each time.

The supply and demand adjustment power command calculation unit 204 calculates the electric power that can be supplied to the electric power transaction at each time as follows.
At time t1, the predicted wind power generation value Wf (t) is within the range of the upper limit value W1t and the lower limit value W1b. In this case, since the charge / discharge of the storage battery is not used to mitigate the fluctuation, all the charge / discharge possible amounts Ca according to the SOC of the storage battery can be provided to the adjusting force.

Td (t) = Xc (t) ... (4)
However, Td (t): W2 lower transaction value Xc (t): storage battery rechargeable value

Ti (t) = Xd (t) ... (5)
However: Ti (t): W2 increase transaction possible value Xd (t): storage battery discharge possible value

Zd (t) = 0 ... (6)
However: Zd (t): Discharge value for fluctuation mitigation

Zc (t) = 0 ... (7)
However: Zc (t): Charge value for fluctuation mitigation

At time t2, the predicted wind power generation value Wf (t) falls below the lower limit value W1b, so that the battery is discharged from the storage battery to mitigate fluctuations. Therefore, the amount directed to electricity trading can be calculated as follows by subtracting the discharge for fluctuation mitigation.

Td (t) = Xc (t) ... (4)

However, Td (t): W2 lower transaction value Xc (t): storage battery rechargeable value

Ti (t) = Xd (t) -Zd (t) ... (8)

However: Ti (t): W2 increase transaction possible value Xd (t): Storage battery discharge possible value Zd (t): Fluctuation mitigation discharge value

Zd (t) = MIN (W1b (t) -Wf (t), Xd (t)) ... (9)

However: Zd (t): Discharge value for fluctuation mitigation W1b (t): Lower limit value Wf (t): Predicted wind power generation value Xd (t): Possible discharge value of storage battery

Zc (t) = 0 ... (10)
However: Zc (t): Charge value for fluctuation mitigation

At time t3, the predicted wind power generation value Wf (t) exceeds the upper limit value W1t, so that the storage battery is charged for fluctuation mitigation. Therefore, the amount of charge directed to electricity trading is calculated as follows by subtracting the charge for mitigating fluctuations.

Ti (t) = Xd (t) ... (5)

However, Ti (t): W2 increase transaction possible value Xd (t): storage battery discharge possible value

Td (t) = Xc (t) -Zc (t) ... (11)
However, Td (t): W2 lower transaction possible value Xc (t): Storage battery chargeable value Zc (t): Fluctuation mitigation charge value

Zd (t) = 0 ... (6)
However: Zd (t): Discharge value for fluctuation mitigation

Zc (t) = MIN (Wf (t) -W1t (t), Xc (t)) ... (12)
However, Zc (t): charge value for fluctuation mitigation Wf (t): wind power generation predicted value W1t (t): upper limit value Xc (t): storage battery rechargeable value

Based on the above concept, the W2 up-transactionable value Ti and the W2 down-transactionable value Td can be calculated for each of the times t1, t2, and t3.

FIG. 4 is a graph illustrating the SOC of the storage battery system 3, the storage battery rechargeable value Xc, and the storage battery dischargeable value Xd.
The chargeable value Xc of the storage battery increases monotonically when it is equal to or more than the lower limit of SOC charging and less than or equal to the upper limit of SOC charging. The lower limit of SOC charging is 0%.
The storage battery dischargeable value Xd monotonically increases when the SOC discharge lower limit value or more and the SOC discharge upper limit value or less. The SOC discharge upper limit is 100%. The storage battery dischargeable value Xd is shown as a negative value.
That is, the storage battery system 3 can be discharged from the SOC in the range of the SOC discharge lower limit value or more, and can be charged in the range of the SOC charge upper limit value or less. The storage battery system 3 cannot be charged when the SOC is close to 100%.

FIG. 5 shows the operation flow of the command center 200.
First, in step S100, the command center 200 performs initialization processing. The progress index calculation unit 201 receives the setting of the start time ts, the end time te, and the supply and demand adjustment power integration upper limit value Wh _A (ID _WF , ts, te) of the supply and demand adjustment power provision. In addition, the supply and demand adjustment power integration Wh _SUM (ID _WF , ts) = 0 is initialized. The supply and demand adjusting ability calculation unit 202 receives the setting of the storage battery capacity Cc (ID _WF ). The fluctuation mitigation calculation unit 203 receives the setting of the installed wind power generation capacity of each wind power generation site 1000. This is because it is necessary to calculate the fluctuation mitigation requirements.

In step S101, the command center 200 repeats the determination in step S101 if the current time t is before the start time ts (No), and if the current time t is after the start time ts (Yes), the command center 200 goes to step S102. move on.

In step S102, the command center 200 proceeds to step S103 if the current time t is before the end time te (No), and ends the process of FIG. 5 if the current time t is after the end time te (Yes). do.
That is, at each time after the start time ts of providing the supply and demand adjusting force, the command center 200 repeats the processes of steps S103 to S109 from the set start time ts to the end time te.

In step S103, the fluctuation mitigation calculation unit 203 receives the weather information Wi of each wind power generation site 1000 and calculates the fluctuation mitigation W (ID _WF , t).
In step S104, the progress index calculation unit 201 receives the supply and demand adjustment power integration Wh _SUM (ID _WF , t) from each wind power generation site 1000, and calculates the progress index WhI (ID _WF , t).
In step S105, the supply and demand adjusting power possible amount calculation unit 202 receives the charge rate SOC (t) of the storage battery and calculates the supply and demand adjusting power possible amount WA (ID _WF , t).

In step S106, the supply and demand adjustment force command calculation unit 204 receives the supply and demand adjustment force required value Wr (t) and calculates the supply and demand adjustment force W (ID _WF , t) command.
In step S107, the SOC adjustment charge / discharge calculation unit 205 calculates the storage battery charge / discharge command value Co (ID _WF , t) for SOC adjustment, and in step S108, sends the calculation result to each wind power generation site 1000.

In step S109, the command center 200 updates at the next time. Here, it is assumed that calculation and transmission / reception can be performed every second, but if transmission / reception takes time, the processes of steps S103 to S109 may be repeated with a waiting time longer than that time.

In the present embodiment, it has been explained that the supply and demand adjustment power command calculation unit 204 includes an ID sort unit 204-1 and a sort order allocation unit 204-2, but the supply and demand adjustment power W (ID _WF , t) The command can also be calculated. For example, the supply and demand adjustment power command calculation unit 204 has the supply and demand adjustment power according to the ratio of the adjustment power provisionable amount Wn (ID _WF , t) in the wind power generation site 1000 in which the index Is (ID _WF , t)> 0. The supply and demand adjusting force W (ID _WF , t) may be determined by prorating the required value Wr (t). For example, after dividing the supply and demand adjustment power requirement value Wr (t) according to the ratio of the adjustment power provisionable amount Wn (ID _WF , t), it is assigned to the wind power generation site 1000 with the index Is (ID _WF , t) = 0. The supply and demand adjustment power W (ID _WF , t) is assigned to the wind power generation site 1000 whose adjustment power supply amount Wn (ID _WF , t) is larger than the supply and demand adjustment power W (ID _WF , t), in descending order of the left side of the front formula. It may be assigned in ascending order, or it may be assigned proportionally.

By the method described above, the supply and demand adjustment power command calculation unit 204 allocates the adjustment power provisionable amount Wn (ID _WF , t) only to the wind power generation site 1000 having the index Is (ID _WF , t)> 0. Become. Therefore, in the command center 200, during the period from the start time ts of the supply and demand adjustment power provision to the end time te, the supply and demand adjustment power integration is performed at the wind power generation site 1000 of the number ID _WF , and the supply and demand adjustment power integration upper limit value Wh _A (ID). It is possible to issue a command of the supply and demand adjusting force W (ID _WF , t) so as to be _WF , ts, te) or less.
As the weather information Wi, not only the weather information Wi (ID _WF , t) of each wind power generation site 1000 but also a wider range of weather information may be used.

In this embodiment, a case where a wind power generator is used as a renewable energy generator has been described, but other solar power generation and geothermal power generation can also be used in the same manner as long as they are equipped with a storage battery for mitigating fluctuations. ..
In the present embodiment, the supply and demand adjustment capacity calculation unit 202 has been described as being located in the command center 200, but it may be configured to calculate at each wind power generation site 1000 or another site and receive the result. Other components can be calculated outside the command center 200 and the results can be received to have the same effect.
In the present embodiment, it has been described that there are a plurality of wind power generation sites 1000 and other sites, but a single site configuration may be used. In that case, if the index Is (ID _WF , t) of the one site is 0 or less, the supply and demand adjustment power is not provided. As a result, the allocation of the supply / demand adjusting power of the wind power generation site whose index Is (ID _WF , t) is 0 or less becomes 0, but the life of the storage battery of the wind power generation site 1000 can be set as planned.

<< Second Embodiment >>
In the first embodiment, as an example of the wind power generation site 1000, the configuration of FIG. 2 is shown assuming that the supply and demand adjustment ability is a contract that can be provided regardless of the fluctuation mitigation requirement. It is considered that this contract will be used when the provision of adjustment power is prioritized even if the frame of the fluctuation mitigation requirement is out of the range when the interconnection line capacity to which the wind power generation site 1000 is connected has a margin. On the other hand, when the interconnection line capacity to which the wind power generation site 1000 is interconnected is insufficient, it is considered that the supply and demand adjustment ability is provided within the range of the fluctuation mitigation requirement, which will be described in the second embodiment. .. Since both cases may be mixed at each wind power generation site 1000, the command center 200 calculates each wind power generation when calculating the adjustment power provisionable amount Wn (ID _WF , t) of each wind power generation site 1000. Determine and calculate which case the site 1000 is.

FIG. 6 shows an example of the wind power generation site 1000, and the description will be centered on a portion different from the configuration of FIG. The wind power generation site 1000 sends the electric power W3 sold as wind power generation to the power line 1100 and the electric power W2 sold as power supply / supply adjusting power to the power line 1200.
The difference from the first embodiment is that the power meter 10 for measuring whether or not the fluctuation mitigation requirement is satisfied is installed on the power system side from the confluence of the power lines 1100 and 1200. In the present embodiment, the electric power measured by the electric power meter 10 is hereinafter referred to as W1. The power meter 11 for measuring the power W2 sold as the supply and demand adjusting power is installed on the wind power generation site 1000 side from the confluence point as in the first embodiment. Other configurations are the same as those of the first embodiment. A power meter 17 is installed to measure the power W3 sold as wind power generation, but it is also possible to calculate by subtracting the power meter 11 from the power meter 10 without installing the power meter 17.

FIG. 7 is an explanatory diagram of a method for calculating a rechargeable battery chargeable value according to the second embodiment.
Further, in the case of this configuration, the adjustable force provisionable amount Wn is calculated by the upper and lower limits of fluctuation mitigation and the method shown in FIG.

At time t1, the output value W1o (t1) = the predicted wind power generation value Wf (t), but the output value W1o (t1) is lowered to the lower limit value W1b (wind power generation predicted value Wf (t) -lower limit value). It is possible to reduce the amount of electric power of W1b) and accommodate electric power trading. This is defined as the W2 lower transaction possible value Td1 (t1). However, in order to reduce the output value W1o to the lower limit value W1b, it is necessary to charge the storage battery with the difference between the wind power generation value and the lower limit value W1b. That is, the output value W1o can be lowered only up to the rechargeable battery chargeable value Xc (t). It is the smaller of the W2 lower transaction possible value Td1 (t) and the storage battery rechargeable value Xc (t) that can be accommodated in the lower power transaction. Further, the lower limit value W1b is calculated by the maximum value −L of the output value W1o for the immediately preceding n minutes, and the upper limit value W1t is calculated by the minimum value + L of the output value W1o for the immediately preceding n minutes.

Td1 (t) = Wf (t) -W1b (t) ... (13)
However, Td1 (t): W2 lower transaction possible value Wf (t): Wind power generation predicted value W1b (t): Lower limit value

Td (t) = MIN (Td1 (t), Xc (t)) ... (14)

However, Td (t): W2 lower transaction possible value Td1 (t): W2 lower transaction possible value Xc (t): Storage battery chargeable value

Zd (t) = 0
However, Zd (t): discharge value for fluctuation mitigation Zc (t) = 0
However, Zc (t): charge value for mitigating fluctuations

Similarly, the electric energy of the difference between the upper limit value W1t and the wind power generation value can be accommodated in the increased power transaction, and this is set as the W2 increased transaction possible value Ti1 (t1). The value that can be accommodated in the power increase transaction is the smaller of the W2 increase transaction possible value Ti1 (t) and the storage battery chargeable value Xc (t).

Ti1 (t) = W1t (t) -Wf (t) ... (15)
However, Ti1 (t): W2 increase transaction possible value W1t (t): upper limit value Wf (t): wind power generation predicted value

Ti (t) = MIN (Ti1 (t), Xd (t)) ... (16)
However: Ti (t): W2 increase transaction possible value Ti1 (t): W2 increase transaction possible value Xd (t): Storage battery discharge possible value

Zd (t) = 0 ... (17)
However, Zd (t): discharge value for fluctuation mitigation

Zc (t) = 0 ... (18)
However, Zc (t): charge value for mitigating fluctuations

At time t2, the wind power generation value falls below the lower limit value W1b, so that the battery is discharged from the storage battery to mitigate fluctuations. Therefore, the amount directed to electricity trading can be calculated as follows. If it is a downturn transaction, it is calculated by the formulas (19) to (21). If it is an up transaction, it is calculated by the formulas (22) to (23), and since the output value W1o is the lower limit value W1b, the W2 down transaction possible value Td (t2) is 0. In addition, even if there is no electricity transaction, it is necessary to discharge from the storage battery to mitigate fluctuations. The discharge value for mitigating fluctuations also needs to be equal to or less than the storage battery dischargeable value Xd. When the fluctuation mitigation discharge value Zd is larger than the storage battery dischargeable value Xd, the output value W1o deviates from the fluctuation mitigation requirement.

Td (t) = Td1 (t) = 0 ... (19)
However, Td (t): W2 lower transaction possible value Td1 (t): W2 lower transaction possible value

Zd (t) = MIN (W1b (t) -Wf (t), Xd (t)) ... (20)
However: Zd (t): Discharge value for fluctuation mitigation W1b (t): Lower limit value Wf (t): Predicted wind power generation value Xd (t): Possible discharge value of storage battery

Zc (t) = 0 ... (21)
However, Zc (t): charge value for mitigating fluctuations

Ti1 (t) = W1t (t) -W1b (t) ... (22)
However, Ti1 (t): W2 increase transaction possible value W1t (t): upper limit value W1b (t): lower limit value

Ti (t) = MIN (Ti1 (t), Xd (t) -Zd (t)) ... (23)
However, Ti (t): W2 increase transaction possible value Ti1 (t): W2 increase transaction possible value Xd (t): Storage battery discharge possible value Zd (t): Fluctuation mitigation discharge value

At time t3, the wind power generation value exceeds the upper limit value W1t, so that the storage battery is charged for fluctuation mitigation. Therefore, if it is a downturn transaction, it is calculated by the formulas (24) to (26) that are directed to the electricity transaction. If it is a raised transaction, it is calculated by the formulas (27) to (28), and the W2 raised transaction possible value Ti (t3) is 0.

Ti (t) = Ti1 (t) = 0 ... (24)
However, Ti (t): W2 increase transaction possible value Ti1 (t): W2 increase transaction possible value

Zd (t) = 0 ... (25)
However, Zd (t): discharge value for fluctuation mitigation

Zc (t) = MIN (Wf (t) -W1t (t), Xc (t)) ... (26)
However: Zc (t): Charge value for fluctuation mitigation Wf (t): Wind power generation predicted value W1t (t): Upper limit value Xc (t): Storage battery rechargeable value

Td1 (t) = W1t (t) -W1b (t) ... (27)
However, Td1 (t): W2 lower transaction possible value W1t (t): upper limit value W1b (t): lower limit value

Td (t) = MIN (Td1 (t), Xc (t) -Zc (t)) ... (28)
However, Td (t): W2 lower transaction possible value Td1 (t): W2 lower transaction possible value Xc (t): Storage battery discharge possible value Zc (t): Fluctuation mitigation discharge value

Also in the second embodiment, the fluctuation mitigation requirement has been described on the premise that the difference between the maximum value and the minimum value of the power generation value within a fixed time frame is within a predetermined range. As another requirement for mitigating fluctuations, there is also a content to prevent the combined output from exceeding a predetermined threshold value Wth [kW] at a site that generates wind power in cooperation with solar power generation. In that case, for example, assuming that the storage battery is charged and discharged so that the output of the wind power generation becomes a predetermined threshold value [kW] and the solar power generation value Ws [kW], the upper limit value in the control of the time t1 or the time t3. W1t and the lower limit value W1b can be set and calculated as follows.

W1t (t) = Wth-Ws (t) ... (29)
However, W1t (t): upper limit value Wth: predetermined threshold value [kW]
Ws (t): Solar power generation value [kW]

W1b (t) =-∞ ... (30)
However, W1b (t): lower limit value

<< Third Embodiment >>
FIG. 8 is a diagram showing an example of the configuration of the command center 200B according to the third embodiment.
In the first and second embodiments, the method of providing the adjusting force for the storage battery for fluctuation mitigation has been described. As the storage battery, it is possible to use a storage battery that has a purpose other than the supply and demand adjusting ability, such as a backup use in the event of a power failure, in addition to the use for mitigating fluctuations. FIG. 8 shows a configuration example of each storage battery site including the command center 200B and the wind power generation sites 1000b and 1000c. The difference from the first embodiment is that the wind power generation site 1000a of the first embodiment is a backup storage battery system 1000d, and the command center 200B is provided with a charge / discharge calculation unit 203B for outside supply / demand adjustment power. .. The backup storage battery system 1000d is configured in the same manner as the wind power generation site 1000a except that the backup storage battery system 1000d is not provided with the wind power generation facility 2.
Since the backup storage battery has a different calculation of the amount of electric power required for the backup application at time t, this is calculated by the supply / demand adjusting power non-application charge / discharge calculation unit 203B.

FIG. 9 is a graph for explaining the required charge / discharge amount according to the third embodiment.
The amount of power required for backup at time t is calculated as follows. If the backup target is an office, it uses a lot of power during the day on weekdays, but requires less power on holidays and at night. From such power demand, the SOC required for time-by-time backup can be represented as shown in FIG.
Specifically, the SOC is lowered by a from 19:00 to 5 am the night before, and the SOC is changed to 100% from 5 am to 9 am. At 16:00 pm, the SOC is gradually lowered, and at 19 at night, the SOC is lowered again by a.
Therefore, if the charge rate SOC (ID _WF , t) of the storage battery is equal to or higher than the SOC required for backup, the charge / discharge amount required for backup is calculated to be 0, that is, it can be fully used for the supply / demand adjustment ability. If the charge rate SOC (ID _WF , t) of the storage battery is equal to or less than the SOC required for backup, the amount of discharge required for backup is infinite and the amount of charge is 0. That is, in the case of discharging, the electric power that can be used for the supply and demand adjusting force is 0, and in the case of charging, all can be used.

FIG. 10 is a flowchart showing the processing of the command center 200B according to the third embodiment.
In the operation flow of the command center 200B of the third embodiment, among the operation flows of the first embodiment shown in FIG. 5, the fluctuation mitigation Wm (ID _WF , t) calculation in step S103 is adjusted as shown in FIG. It can be realized by changing to the charge / discharge calculation process outside the power application. The processing of FIG. 10 is performed by the supply / demand adjusting force non-use charge / discharge calculation unit 203B.
In step S200, the supply / demand adjusting power non-use charge / discharge calculation unit 203B determines whether or not the processing has been performed for all the storage battery sites. If there is an unprocessed storage battery site (No), the supply and demand adjusting power external charge / discharge calculation unit 203B proceeds to the process of step S201, and if all the storage battery sites are processed (Yes), FIG. 10 shows. End the process.

In step S201, the supply / demand adjusting force non-use charge / discharge calculation unit 203B sets the next number ID _WF . In step S202, the supply / demand adjusting power non-use charge / discharge calculation unit 203B determines whether the storage battery site of the number ID _WF is for backup. If this determination is Yes, the process proceeds to step S203, the charge / discharge amount Cio (ID _WF , t) of the storage battery is calculated from the SOC required for backup at each time, and the process returns to step S200.
If the determination in step S202 is No, the process proceeds to step S204, and the wind power output upper limit command value Wo (ID _WF , t) and the charge / discharge amount Cio (ID _WF , t) of the storage battery are calculated by calculating the fluctuation mitigation W (ID _WF , t). Is calculated, the process returns to the process of step S200.

As described above, in the third embodiment, the method of providing the supply and demand adjusting ability using the backup storage battery and the fluctuation mitigation storage battery has been described. Since it is necessary to secure the expected life of the backup storage battery as well, the supply amount is determined using the supply and demand adjustment power integration upper limit Wh _A (ID _WF , ts, te) during the adjustment power provision period. There is a need. Further, the same can be performed with a storage battery for purposes other than backup and fluctuation mitigation. That is, the supply / demand adjusting power non-use charge / discharge calculation unit 203B can calculate the charge / discharge amount Cio of the storage battery used for the use different from the adjustment power provision such as the use for mitigating fluctuations in renewable energy and the use for backup.

Even if the use of the storage battery at each wind power generation site in FIG. 1 is not described in the first to third embodiments, the supply and demand adjustment power integration upper limit value Wh _A (ID _WF ) during the adjustment power provision period , Ts, te), the command center 200B can calculate the adjustment force providing command value within the range.

In addition, even when the storage battery of some sites is used exclusively for providing adjustment power, the supply and demand adjustment power integration upper limit value Wh _A (ID _WF , ts, te) is set to infinity, and the command center 200B gives a command in the same manner. It can be realized by calculating the value. In that case, the storage battery dedicated to providing the adjusting power is given priority to provide the adjusting power, and the charge / discharge is assigned to the storage battery of another site only when the storage battery dedicated to providing the adjusting power cannot provide the adjusting power.

(Modification example)
The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations. It is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. Further, it is also possible to add / delete / replace a part of the configuration of each embodiment with another configuration.

Each of the above configurations, functions, processing units, processing means, and the like may be partially or wholly realized by hardware such as an integrated circuit. Each of the above configurations, functions, and the like may be realized by software by the processor interpreting and executing a program that realizes each function. Information such as programs, tables, and files that realize each function can be placed in a recording device such as a memory, hard disk, SSD (Solid State Drive), or a recording medium such as a flash memory card or DVD (Digital Versatile Disk). can.

In each embodiment, the control lines and information lines indicate what is considered necessary for explanation, and do not necessarily indicate all the control lines and information lines in the product. In practice, it may be considered that almost all configurations are interconnected.

2 Wind power generation equipment 3 Storage battery system 4 Supply / demand adjustment power integrating unit 5 Information receiving unit 8 Power converter 9,10,11 Power meter 12,13,14 Power converter 15,16 Transformer 17 AC / DC converter 18 DC / AC Converter 101, 102, 103, 104 Power line 200, 200B Command center 201 Progress index calculation unit (index calculation unit)
202 Supply and demand adjustment power possible amount calculation unit 203 Fluctuation mitigation calculation unit 203B Supply and demand adjustment power External charge / discharge calculation unit 204 Supply and demand adjustment power command calculation unit 300 Control unit 1000a to 1000c Wind power generation site (example of site)
1000d backup storage battery system (an example of the site)
1100a to 1100c, 1200a to 1200c power line 2000 power system

Claims (8)

Demand and supply adjustment power that calculates the adjustment power provision command value of the storage battery of each said site and commands the storage battery of each said site so that the total charge and discharge of the storage batteries installed at one or more sites becomes the adjustment power required value. In the provision system
The supply and demand adjustment power provision system is
The adjustment power provision integrated value, which is the integrated value of the adjustment power provided by the storage battery of each site at each time, and the upper limit of the adjustment power provision integrated value are received, and the adjustment power provision integration index of the storage battery of each site is used. The index calculation unit to calculate and
A supply and demand adjustment capacity calculation unit that calculates the supply and demand adjustment capacity possible amount of the storage battery of each site based on the capacity, charge / discharge amount, and charge rate of the storage battery at each site.
A supply and demand adjustment power command calculation unit that calculates the adjustment power provision command value of the storage battery of each site based on the adjustment power requirement value, the adjustment power provision integration index, and the supply and demand adjustment power possible amount.
A supply and demand adjustment power provision system characterized by being equipped with. The storage battery at each of the above sites is installed next to the renewable energy generator site and used for fluctuation mitigation.
Further provided with a fluctuation mitigation calculation unit that calculates the power generation amount of the renewable energy generator site from the weather information and calculates the charge / discharge amount of the storage battery of each said site based on the fluctuation mitigation of the power generation amount.
The supply and demand adjusting ability providing system according to claim 1. The storage battery at each site is a storage battery for backup in the event of a power failure.
The supply and demand adjustment capacity calculation unit holds the charge rate of the storage battery required for backup, and calculates the supply and demand adjustment capacity possible amount at each time from the charge rate of the storage battery.
The supply and demand adjusting ability providing system according to claim 1. The supply and demand adjustment power command calculation unit
The adjustment power provision command value is not assigned to the storage battery of each site where the adjustment power provision integrated value is equal to or larger than the adjustment power provision integration upper limit value.
The supply and demand adjusting ability providing system according to claim 1. Supply and demand adjustment power to calculate the amount of charge and discharge used for different purposes from the provision of adjustment power of the storage battery at each site.
The supply and demand adjusting power providing system according to claim 1, further comprising. The supply and demand adjustment power out-of-use charge / discharge calculation unit
The supply and demand adjustment power of the storage battery for each site is calculated according to the application of the storage battery for each site.
The supply and demand adjusting ability providing system according to claim 5. A renewable energy generator having a function of suppressing power generation below the output upper limit command value by receiving an output upper limit command value, a charge / discharge command value, and a supply and demand adjustment force command value from a command center.
A storage battery system that charges and discharges the storage battery according to the charge / discharge command value and outputs the current charge rate.
A power converter that distributes the sum of the output upper limit command value and the charge / discharge command value to the first power obtained by subtracting the supply and demand adjustment force command value and the second power according to the supply and demand adjustment force command value.
The first power meter for measuring the first power and
A second electricity meter that measures the second power,
Supply and demand adjustment power provision system equipped with. The command center holds the fluctuation mitigation requirement that the first electric power should be satisfied with, and based on the fluctuation mitigation requirement, the output upper limit command value, the charge / discharge command value, and the supply / demand adjustment force command value are set. calculate,
The supply and demand adjusting ability providing system according to claim 7.

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