WO2011099142A1

WO2011099142A1 - Wind turbine generator system

Info

Publication number: WO2011099142A1
Application number: PCT/JP2010/052055
Authority: WO
Inventors: 松夫坂東
Original assignee: 日本風力開発株式会社
Priority date: 2010-02-12
Filing date: 2010-02-12
Publication date: 2011-08-18

Abstract

A wind turbine generator system for outputting a constant electric power to external utility grids comprises: a wind turbine generator; a storage battery into which electric power generated by the wind turbine generator is charged; an electric power measuring unit for measuring the current electric powers of respective currents at first and second measuring points on a first power cable connecting the wind turbine generator and the external utility grids and at a third measuring point on a second power cable connecting the first power cable and the storage battery; and an electric power separation unit for, based on the measurement results by the electric power measuring unit, separating electric power to be purchased from a power producer from electric power generated by the wind turbine generator. The first measuring point is positioned between a connection point of the first and second power cables and the external utility grids, the second measuring point between the connection point and the wind turbine generator, and the third measuring point between the connection point and the storage battery.

Description

Wind power generation system

The present invention relates to a wind power generation system, and more particularly to a storage battery combined type wind power generation system.

Since wind power generation generates power using natural wind as a driving force, as shown in FIG. 23, the output power fluctuates according to the wind speed fluctuation. For this reason, there is a problem in directly transmitting the electric power obtained by wind power generation to the electric power system of the electric power company.

As a countermeasure against this, by installing a storage facility consisting of multiple storage batteries at a wind power plant, the power generation that fluctuates depending on the wind speed can be shaped and controlled to a constant output by charging and discharging the storage battery, or the power obtained by wind power generation can be controlled. There are an increasing number of cases where power is stored at night when power demand is low and power is connected to the power grid in the daytime when power demand is high (see, for example, Patent Document 1).

However, as shown in FIG. 24, since the wind is usually weak and the amount of wind power generation is extremely small during the period from early summer to early autumn, even if a storage battery is installed as described above, the operation rate of the storage battery is very low, There is a problem in collecting the cost of the land.

When a NAS (sodium sulfur) battery is used as a storage battery, the NAS battery has a characteristic of charging and discharging at a temperature of about 300 degrees. The necessary temperature is maintained.

However, in the case of NAS batteries, since Joule heat is proportional to the amount of charge and discharge of power, the amount of power generated by wind power generation is small in the season when wind speed is low, and the heat insulation heat source is mostly a heater. There is a problem of increasing.

Japanese Patent No. 3758359

The following three proposals can be considered as methods for solving the above problems.

(A) A method of stopping wind power generation and charging the storage battery only with purchased power from other power generation companies (hereinafter referred to as “other power generation companies”), and selling this power When the wind conditions are weak Stops wind power generation during times when power demand is low, purchases cheap power from other power generation companies and stores it in storage batteries, and purchases during times when power demand is high and power is traded at high prices Sell power that matches the amount of power. Here, the “wind condition” refers to the state and nature of the wind. Specifically, it refers to the situation of average wind speed, the situation of instantaneous wind speed, the appearance situation of wind direction, or the appearance situation of wind speed, and the like.

(B) A method of charging the storage battery with only purchased power, and then combining the discharged power and the power generated by wind power generation in the daytime to sell the power. Stop wind power generation, purchase inexpensive power from other power generation companies and store it in storage batteries, and combine it with the power generated by your own wind power generation during times when power demand is high and power is traded at high prices. To sell the power shaped into a constant waveform. In addition, charge to a storage battery is classified and controlled only as purchased power from another power generation company.

(C) Method of selling purchased power and power generated by wind power generation in a storage battery, and combining the discharged power with the power generated by actual wind power generation during the daytime to sell electricity The power purchased at low cost from other power generation companies and the power generated by its own wind power generation are combined and stored in the storage battery, and there is a lot of power demand. Electricity. In addition, charging / discharging to a storage battery is performed with the synthesized electric power.

Of the above three proposals, when (b) and (c) are actually carried out, other power generation companies are involved in relation to the RPS Act (Renewable Portfolio Standard: Special Measures Law for Promotion of New Energy Use, etc.). It is necessary to divide the electricity purchased from the plant and the electricity generated by its own wind power generation.

However, under the present circumstances, there is no method of such a metric classification, and there is a problem that it is difficult to execute the above plans (b) and (c).

The present invention has been made in consideration of the above points, and intends to propose a wind power generation system capable of accurately measuring and classifying purchased power from other power generation companies and power generated by own wind power generation. .

In order to solve such a problem, in the present invention, in the wind power generation system that outputs constant power to the power system by charging / discharging the storage battery with the generated power obtained by the wind power generation output from the wind power generator, A first transmission line connecting the generator and the power system; a second transmission line connecting the first transmission line and the storage battery; and the first and second of the first transmission line. The power system side from the connection point of the transmission line, the wind power generator side from the connection point of the first and second transmission lines of the first transmission line, and the first of the second transmission line. Based on the measurement result of the electric energy measuring unit and the electric energy measuring unit that measures the tidal electric energy for each tidal current on the storage battery side from the connection point of the first and second transmission lines, Purchased power and power generated by own wind power Classification was provided and a power division part for.

According to the present invention, it is possible to realize a wind power generation system that can accurately measure and classify purchased power from other power generation companies and power generated by own wind power generation.

It is a block diagram which shows the structure of the wind power generation system by 1st and 2nd embodiment. (A)-(B) are characteristic curve diagrams showing wind condition examples for two months before and after the strong wind season. It is a block diagram which shows the detailed structure of the electric energy measuring part in 1st and 2nd embodiment. It is a figure which shows the example of a format of a power bill. It is a figure which shows the example of a format of a power bill transfer notification. It is a figure which shows the example of a format of a RPS electric power bill. It is a figure which shows the example of a format of a meter-reading notice (breakdown). It is a figure which shows the example of a format of a meter-reading notification document (interconnection point transmission power calculation document). It is a figure which shows the example of a format of a meter-reading notification. It is a figure which shows the example of a format of a meter-reading notice (RPS object calculation report). It is a figure which shows the example of a format of a meter-reading notification document (interconnection point received power calculation document). It is a figure which shows the example of a format of a daily report. It is a figure which shows the example of a format of a monthly report. It is a flowchart which shows the specific processing content of the electric power monitoring control apparatus regarding the storage battery charging / discharging control processing by 1st Embodiment. It is a flowchart which shows the specific processing content of the electric power monitoring control apparatus regarding the storage battery charging / discharging control processing by 2nd Embodiment. It is a block diagram which shows the structure of the wind power generation system by 3rd and 4th embodiment. It is a block diagram which shows the detailed structure of the electric energy measuring part in 3rd and 4th embodiment. It is a block diagram which shows the detailed structure of the electric energy measuring part in 3rd and 4th embodiment. (A) to (C) are conceptual diagrams for explaining the operation of the electric energy measuring unit in the third and fourth embodiments. (A) to (C) are conceptual diagrams for explaining the operation of the electric energy measuring unit in the third and fourth embodiments. It is a flowchart which shows the specific processing content of the electric power monitoring control apparatus regarding the storage battery charging / discharging control processing by 3rd Embodiment. It is a flowchart which shows the specific processing content of the electric power monitoring control apparatus regarding the storage battery charging / discharging control processing by 4th Embodiment. It is a figure where it uses for description of the relationship between the wind speed fluctuation | variation and output fluctuation | variation in wind power generation. It is a figure which shows the wind condition example for every season.

DESCRIPTION OF

SYMBOLS

1,40,50,60 ... Wind power generation system, 2 ... Wind power plant, 3 ... Wind power generator, 6,8 ... Power cable, 10 ... AC / DC converter, 12 ... Transformer for connection, 13 ... Storage battery, 14 ... Power system, 16, 41, 58, 61 ... Power monitoring and control device, 25, 51 ... Power meter side, 30 ... Interconnection point transmission watt-hour meter, 31 ... Connection point received watt-hour meter, 32 ... Generator transmission Electricity meter, 33 ... Generator receiving energy meter, 34 ... Storage battery discharging energy meter, 35 ... Storage battery charging energy meter, 52 ... Generator system side receiving energy meter, P1 ... Interconnection point side energy measuring point , P2: Generator side power amount measurement point, P3: Storage battery side power amount measurement point, P4: Generator system side received power amount measurement point, PC: Connection point

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(1) First Embodiment (1-1) Configuration of Wind Power Generation System According to the Present Embodiment In FIG. 1, reference numeral 1 denotes a wind power generation system according to the present embodiment as a whole. The wind power generation system 1 includes a plurality of wind power plants 2.

Each wind power plant 2 includes a wind power generator 3, a transformer 4, and a switch 5. After the generated power output from the wind power generator 3 is transformed to a predetermined voltage by the converter 4, the switch 5 Is output to the first power cable 6. Then, the generated power output from each wind power plant 2 is combined and the combined power generated is the switch 7 on the first power cable 6 and the second power cable connected to the first power cable 6. The power is supplied to the AC / DC converter 10 through the switch 9 on the power supply 8 and is also supplied to the interconnection transformer 12 through the switch 11 on the first power cable 6.

The AC / DC converter 10 is purchased under the control of the storage battery control device 15 when the storage battery 13 is charged via the combined power generated from each wind power plant 2 or the power system 14 of the grid power company as described later. The purchased power from the other power generation company is converted into DC waveform charging power and supplied to the storage battery 13. Thereby, the storage battery 13 is charged based on this charging power.

Further, under the control of the storage battery control device 15, the orthogonal transformation device 10 converts the discharge power from the storage battery 13 into discharge power having an AC waveform and outputs it to the second power cable 8 when the storage battery 13 is discharged. Thereby, this discharge power is consumed in the wind power generation system 1 as described later, or is given to the interconnection transformer 12 via the switch 11.

The substation interconnection transformer 12 is a composite generated power and storage battery that are given via the first power cable 6 when selling power to an interconnection power company or the like under the control of a power monitoring control device 16 described later. 13 discharge power or the combined power of the combined generated power and the discharge power of the storage battery 13 is boosted to a predetermined voltage and output to the power system (transmission network) 14 of the grid power company. In addition, when purchasing power from another power generation company or the like, the substation linking transformer 12 steps down the purchased power taken in via the power grid 14 to a predetermined voltage and outputs it to the first power cable 6. .

The storage battery 13 is composed of, for example, a plurality (for example, 17 units) of NAS storage batteries connected in parallel. Each NAS storage battery has a storage capacity of 2 MW, and a predetermined number (for example, 15 units) of NAS storage batteries among the plurality of NAS storage batteries is used.

The storage battery control device 15 is composed of, for example, a personal computer. The storage battery control device 15 controls charging / discharging of the storage battery 13 via the AC / DC conversion device 10 under the control of the power monitoring control device 16. In addition, the storage battery control device 15 manages the amount of power stored in the storage battery 13 and periodically notifies the power monitoring control device 16 of this amount of power.

The power monitoring control device 16 is constituted by, for example, a personal computer or a workstation. The power monitoring and control device 16 is connected via a communication network 17 such as the Internet to a meteorological data distribution server of the weather service support center 18, a bid server of the Japan Wholesale Power Exchange 19, a central power supply command server of the central power supply command center 20, and the like. It is connected to the.

Based on the “next day wind power generation plan” created by the power generation planning device 21 to be described later, the power monitoring and control device 16 determines the amount of power that can be sold the next day as 30 minutes, which is the transaction unit time of the Japan Wholesale Power Exchange 19. Bids are placed on the bid server of the Japan Wholesale Electric Power Exchange 19 as a product. In addition, the power monitoring and control device 16 can stably output the fixed amount of power for which the transaction has been established to the power grid 14 of the grid power company in the corresponding time zone via the storage battery control device 15. And the amount of power generation at each wind power plant 2 is controlled via the wind power plant controller 22.

The power generation planning device 21 is composed of, for example, a personal computer on which a “power generation planning tool” that is predetermined application software is installed. The power generation planning device 21 predicts wind conditions (wind speed, wind direction, etc.) for each hour and each wind power plant based on the weather forecast data distributed from the weather data distribution server of the meteorological work support center 18, and the prediction result And the power generation prediction amount for each wind power plant 2 is calculated based on the wind speed-specific output curve (power curve) for each wind power plant 2 managed in advance.

Further, the power generation planning device 21 calculates the amount of wind power generation possible by summing up the predicted power generation amounts of all the wind power plants 2, and the wind power generation potential, the maintenance plan information of the wind power plant 2, the failure stop information, etc. Based on the above, the “weekly wind power generation plan” that is the power generation plan for one week and the “next day wind power generation plan” that is the power generation plan for the next day are created. The power generation planning device 21 corrects the “weekly wind power generation plan” based on weather forecast data that changes every day. Then, the “next day wind power generation plan” corrected based on the weather forecast data of the next day is the basis for the discharge / charge plan for the storage battery 13 and the wind power generation suppression plan.

The wind power plant control device 22 is SCADA (Supervisory Control 計測 and Data Acquisition System), which is control software for controlling and monitoring the measurement data of each wind power plant 2, and the output power and power factor adjustment of each wind power plant 2. For example, a personal computer or a workstation on which WFMS (Windfarm Management System) is installed.

The wind power plant control device 22 is connected to the wind power generator 3 of each wind power plant 2 via the first network 23, and the transformer 4 of each wind power plant 2 via the second network 24. Under the control of the power monitoring control device 16, control and management of wind power generators at each wind power plant 2, suppression and management of power generation amount at each wind power plant 2, and the like are performed.

(1-2) Storage battery charge / discharge control system in wind power generation system Generally, the capacity of the storage battery installed in the wind power generation system is selected to be about 25-60% of the rated capacity of the wind power plant. For this reason, there is a limit to the amount of power that can be stored. Therefore, based on a reliable prediction of the wind conditions, it is necessary to operate in such a way as to limit the wind power generation in consideration of the storage battery capacity and not reduce the overall efficiency of the wind power plant.

Therefore, in the wind power generation system 1 according to the present embodiment, the overall efficiency of the wind power plant 2 is improved by effectively utilizing the storage battery 13 as follows.

(A) Case where only charging / discharging of power from the power system is permitted by the connected power company Wind power generation that can charge the storage battery 13 during a period of low wind (for example, the period from early summer to early autumn) when the wind condition is bad The storage battery 13 cannot be fully utilized due to a small amount of electric power. Therefore, during this period, the wind power generator 3 of the wind power plant 2 is stopped, the inexpensive power of another power generation company is purchased and charged to the storage battery 13 during a time period when the power demand is low, Sell power at a lot of time.

(B) Cases where the combined power of purchased power and own wind power is permitted by the grid power company only at the time of power sale Wind power is stopped during periods when the wind conditions are weak, and cheap power from other power generators Purchase and store in the storage battery 13, and sell the power that is shaped to a constant output by combining the purchased power with your own wind power during the time when the power demand is high and the power is traded at a high price .

As shown in FIGS. 2 (A) to 2 (D), looking at the two months before and after the low wind period (June to September (see FIG. 24)), the wind conditions are weak for several days and the storage battery 13 by wind power generation is used. May not be able to charge. In FIG. 2, (A) shows an example of wind conditions in April, (B) in May, (C) in October, and (D) in November. Therefore, by accurately predicting this wind condition, charging the storage battery 13 with the purchased power from another power generation company, and selling the purchased power during the time when the power is traded at a high price, And a difference between the electricity sales fee and the electricity sales fee.

(C) Case where the combined power of purchased power and own wind power is permitted by the grid power company When the wind condition is accurately predicted and the wind power is very small and the storage battery 13 has a margin for charging The electric power purchased from other power generation companies in the time zone where the fee is inexpensive and the wind power generated by the power generator are combined and stored in the storage battery 13, and the discharge of the storage battery 13 is performed in the time zone when the power is traded at a high price. Combined with the wind power generated from time to time, the power is sold.

However, in order to operate as described above, it is necessary to measure and divide the power purchased from other power generation companies and the power generated by own wind power generation in relation to the RPS law as described above.

Therefore, in the wind power generation system 1 according to the present embodiment, the power for measuring the amount of power transmitted and received at a predetermined measurement point is used as a means for measuring and classifying the purchased power from other power generation companies and the power generated by own wind power generation. A quantity measuring unit 25 is provided. That is, as shown in FIG. 1, the electric energy measuring unit 25 is connected to the interconnection point side electric energy set between the electric power system 14 of the interconnection electric power company on the first electric power cable 6 and the interconnection transformer 12. A measurement point P1, a generator-side energy measurement point P2 set between the connection point (node) PC of the first and

second power cables

6 and 8, and the wind power plant 2, and the first and second The transmission / reception power amount at the storage battery side power amount measurement point P3 set between the

power cables

6 and 8 and the storage battery 13 is measured for each tidal direction.

More specifically, as shown in FIG. 3, the electric energy measuring unit 25 includes an interconnection point received electric energy meter 30 and an interconnection point transmission electric energy meter 31 connected to the interconnection point side electric energy measurement point P1. A generator-received energy meter 32 and a generator-transmitted energy meter 33 connected to the generator-side energy measurement point P2, and a storage battery charge energy meter 34 and a storage battery connected to the storage battery-side energy measurement point P3. It comprises a discharge wattmeter 35.

The connection point power reception watt-hour meter 30 measures the power reception power amount from the power system 14 side at the connection point side power amount measurement point P1, and connects one pulse every time a constant power amount (for example, 1 kW) is measured. It is sent to the power monitoring controller 16 as a system point power receiving pulse. The connection point transmission watt-hour meter 31 also measures the transmission power amount to the power system 14 side at the connection point side power amount measurement point P1 and transmits one pulse every time a constant power amount is measured. A pulse is sent to the power monitoring control device 16.

Similarly, the generator received power meter 32 measures the amount of power received from the power system 14 side at the generator side power amount measurement point P2, and each time a certain amount of power is measured, one pulse is received on the generator side. It transmits to the electric power monitoring control apparatus 16 as a pulse. The generator transmission power meter 33 measures the amount of power transmitted to the power system 14 at the generator-side power amount measurement point P2 (that is, the combined amount of generated power) and measures a certain amount of power (for example, 1 kW). One pulse is transmitted to the power monitoring controller 16 as a generator-side power transmission pulse.

Furthermore, the storage battery charge watt-hour meter 34 measures the charge power amount for the storage battery 13 at the storage battery side power amount measurement point P3, and monitors power as one charge power pulse every time a constant power amount (for example, 1 kW) is measured. Transmit to the control device 16. Further, the storage battery discharge watt-hour meter 35 measures the discharge power amount from the storage battery 13 at the storage battery side power amount measurement point P3, and monitors power as one discharge power pulse every time a constant power amount (for example, 1 kW) is measured. Transmit to the control device 16.

The power monitoring and control device 16 includes a connection point power reception pulse and a connection point power transmission pulse transmitted from the connection point power reception energy meter 30 and the connection point transmission power energy meter 31, respectively, a generator reception power energy meter 32, and A generator-side power reception pulse and a generator-side power transmission pulse transmitted from the generator transmission power meter 33, respectively, and a charging power pulse and a discharge power pulse transmitted from the storage battery charging power meter 34 and the storage battery discharging power meter 35, respectively. For example, the number of pulses is cumulatively counted, for example, on a monthly basis.

In addition, the power monitoring control device 16 performs other power generation based on the accumulated results of the connection point power reception pulse, the connection point power transmission pulse, the generator side power reception pulse, the generator side power transmission pulse, the charge power pulse, and the discharge power pulse. The electric power purchased from the company and the electric power generated by its own wind power generation are metered, for example, monthly.

The power monitoring and control device 16 uses the power charge bill 35A for charging the power company according to the amount of power sold based on the power amount thus metered, and the other according to the purchased power amount. A power charge transfer notification 35B for notifying the power generation company of the power rate transferred to the power generation company's account, and RPS power for charging the power company according to the amount of power sold based on the RPS law Various invoices / notifications 35 such as a charge invoice 35C are created every month. Examples of formats of the power bill 35A, the power bill transfer notification 35B, and the RPS power bill 35C are shown in FIGS.

Also, the power monitoring control device 16 creates a meter reading notification 36 based on the amount of power metered and sorted as described above. The meter reading notification 36 created at this time includes a meter reading notification (breakdown) 36A, a meter reading notification (linked-point transmission power calculation report) 36B, a meter reading notification 36C, a meter reading notification (RPS target calculation report) 36D, and There are five types of meter-reading notices (linked-point received power calculation form) 36E.

Of these, the meter reading notification (breakdown) 36A purchases the breakdown of the transmitted power amount and the received power amount at the connection point side power amount measurement point P1, the generator side power amount measurement point P2, and the storage battery side power amount measurement point P3. This is a notice for notifying a person, for example, in a format as shown in FIG. In addition, the meter reading notification (linked point transmission power calculation report) 36B obtains the transmission power amount at the connection point side energy measurement point P1, the generator side energy measurement point P2, and the storage battery side energy measurement point P3. For example, and is created in the format shown in FIG.

On the other hand, the meter-reading notice 36C indicates the breakdown of the transmitted / received electric energy at the interconnection point side electric energy measurement point P1, the generator side electric energy measurement point P2, and the storage battery side electric energy measurement point P3. For example, and is created in the format shown in FIG. The meter reading notice (RPS target calculation form) 36D is a notice for notifying the power purchaser of the amount of power to be subject to the RPS method and a watt-hour meter for measuring the amount of power, for example, FIG. Created in a format like

Further, the meter reading notification (interconnection point received power calculation report) 36E sells the received power amount at the connection point side energy measurement point P1, the generator side energy measurement point P2, and the storage battery side energy measurement point P3. This is a notice for notifying a person, for example, in a format as shown in FIG.

Furthermore, the power monitoring and control device 16 creates, for example, a daily report as shown in FIG. 12 or a monthly report as shown in FIG. 13 based on the amount of power metered and sorted as described above.

The power monitoring control device 16 outputs various bills / notifications 35, meter reading notifications 36, daily reports, monthly reports, and the like thus created to the printer 26 as necessary.

(1-3) Specific Processing of Power Monitoring and Control Device Regarding Charge / Discharge Control of Storage Battery FIG. 14 shows specific processing contents of the power monitoring control device 16 regarding charging / discharging control of the storage battery 13 as described above. The power monitoring control device 16 executes the storage battery charge / discharge control process shown in FIG. 14 in accordance with a corresponding control program stored in an internal memory (not shown).

That is, when the execution instruction of the storage battery charge / discharge control process is input, the power monitoring control device 16 starts the storage battery charge / discharge control process. First, the connection point given from the connection point power reception watt-hour meter 31 is started. A power amount KR (KR1, KR2, KRB) for each one of the received pulse, the generator-side received pulse given from the generator received-power meter 33 and the charging power pulse given from the storage battery charging watt-hour meter 35, For each one pulse of the interconnection point transmission pulse given from the system point transmission watt-hour meter 30, the generator-side transmission pulse given from the generator transmission watt-hour meter 32, and the discharge power pulse given from the storage battery discharge watt-hour meter 34 The electric energy KS (KS1, KS2, KSB) is set to a predetermined value set in advance. Further, the power monitoring control device 16 sets the count value of each counter described in step SP5, step SP7, step SP8, step SP11, step SP13 and step SP14 to the initial value “0”, and sets the instrument reading date and time. The parameter n to be represented is set to an initial value “1” (SP1).

Subsequently, the power monitoring control device 16 receives the connection point transmission pulse from the connection point transmission energy meter 30, the connection point reception pulse from the connection point reception energy meter 31, and the generator transmission energy meter 32. Generator-side power transmission pulse, generator-side received power meter 33 from generator-received energy meter 33, discharge power pulse from storage battery charge-power meter 34, and charge power pulse from storage battery charge-power meter 35 are input. It waits to do (SP2).

Then, the power monitoring control device 16 receives any one of the connection point power transmission pulse, the connection point power reception pulse, the generator side power transmission pulse, the generator side power reception pulse, the discharge power pulse, and the charge power pulse. Then, it is determined whether the transmission source of the pulse is any one of the connection point transmission watt-hour meter 30, the generator transmission watt-hour meter 32, and the storage battery discharge watt-hour meter 34 (SP3).

If the power monitoring control device 16 obtains a positive result in this determination, it continues to determine whether or not the transmission source of the pulse received in step SP2 is a connection point transmission power meter (SP4). When the power monitoring control device obtains a positive result in this determination, it increments the count value of the counter corresponding to the interconnection point transmission power meter 30 by 1 (SP5).

Further, when the power monitoring control device 16 obtains a negative result in the determination at step SP4, it determines whether or not the transmission source of the pulse received at step SP2 is the generator transmitted power meter 32 (SP6). When the power monitoring control device 16 obtains a positive result in this determination, it increments the count value of the counter corresponding to the generator transmission power meter 32 by 1 (SP7), and obtains a negative result, The count value of the counter corresponding to the storage battery discharge watt-hour meter 34 is increased by 1 (SP8).

Thereafter, the power monitoring control device 16 increases the value of the parameter n as necessary, and determines whether or not the value of the parameter n has reached a value representing a predetermined counter reading deadline date (SP9). ) If a negative result is obtained, the process returns to step SP2.

On the other hand, if the power monitoring control device 16 obtains a negative result in the determination at step SP3, it determines whether or not the transmission source of the pulse received at step SP2 is the interconnection point received power meter 31 ( SP10). Then, when the power monitoring control device 16 obtains a positive result in this determination, the power monitoring control device 16 increases the count value of the counter corresponding to the interconnection point received power meter 31 by one. (SP11)

Further, when the power monitoring control device 16 obtains a negative result in the determination at step SP10, it determines whether or not the transmission source of the pulse received at step SP2 is the generator received power meter 33 (SP12). When the power monitoring control device 16 obtains a positive result in this determination, it increments the count value of the counter corresponding to the generator received power meter 33 by 1 (SP13). The count value of the counter corresponding to the watt hour meter 35 is incremented by one. (SP14)

Thereafter, the power monitoring control device 16 increases the value of the parameter n as necessary, and determines whether or not the value of the parameter n has reached a value representing a predetermined counter reading deadline date (SP15). ) If a negative result is obtained, the process returns to step SP2.

On the other hand, if the power monitoring control device 16 obtains a positive result in the determination at the above-described step SP9 or step SP15, it corresponds to the count value of the counter corresponding to the interconnection point transmission watt-hour meter 30 and the generator transmission watt-hour meter 32. By multiplying the count value of the counter and the count value of the counter corresponding to the storage battery discharge energy meter 34 by the corresponding constant KS1, constant KS2 or constant KSB set in step SP1, respectively, the interconnection point transmission power amount PS1, A generator transmission power amount PS2 and a storage battery discharge power amount PSB are respectively calculated (SP16).

In addition, the power monitoring control device 16 includes a counter value corresponding to the connection point received energy meter 31, a counter value corresponding to the generator received energy meter 33, and a counter corresponding to the storage battery charge energy meter 35. Is multiplied by the corresponding constant KR1, constant KR2, or constant KRB set in step SP1, respectively, to thereby calculate the interconnection point transmission power amount PR1, the generator transmission power amount PR2, and the storage battery discharge power amount PRB. (SP16).

Subsequently, the power monitoring control device 16 has the following formula:

Thus, the power loss TrlossR in the substation interconnection transformer 12 (FIG. 1) is calculated (SP17). In Equation (1), Trcloss and Trfloss are the copper loss and iron loss of the substation interconnection transformer 12, respectively, and P0 is the rating of the substation interconnection transformer 12. These are the power monitoring and control devices in advance. 16 is given.

Next, the power monitoring control device 16 connects the connection point transmission power amount PS1, the generator transmission power amount PS2, and the storage battery discharge power amount PSB, the connection point reception power amount PR1, and the generator reception power obtained as described above. Necessary arithmetic processing is executed based on the power PR2 and the storage battery charge power PRB and the power loss TrlossR in the substation interconnection transformer 12 (SP18).

Specifically, the power monitoring control device 16 supplies the amount of power given from the power system 14 (FIG. 1) out of the amount of power charged in the storage battery 13 (hereinafter referred to as storage battery charge power amount (system)). LPC is the following formula

And the amount of combined generated power out of the amount of power charged in the storage battery 13 (hereinafter referred to as the storage battery charge power amount (power plant)) GPC

Calculated by

In addition, the power monitoring and control device 16 uses the GPS2 that expresses the amount of power directly transmitted to the power system 14 of the interconnected power company in the combined generated power (hereinafter referred to as “generator direct transmission power amount”).

Calculated by

Further, the power monitoring and control device 16 includes an amount of power corresponding to the amount of charge from the power system 14 among the amount of power discharged from the storage battery 13 (hereinafter referred to as storage battery discharge power amount (system charge)) LCPS10. The following formula

The amount of power corresponding to the amount of charge based on the combined generated power out of the amount of power discharged from the storage battery 13 (hereinafter referred to as storage battery discharge power (generator charge)) GCPS20 is

Calculated by

Furthermore, the power monitoring and control device 16 uses the following formula combined generated power for the amount of charge to the storage battery 13 and the direct power to the power system 14 (hereinafter referred to as the combined power transmission power generation (power generation + storage)). Call the GPS22)

Calculated by In addition, the power monitoring and control device 16 uses the power generation combined transmission power amount (power generation + storage), and the apportioned power amount obtained from the power system 14 out of the power amount transmitted to the power system 14 of the connected power company. (Hereinafter, this is referred to as interconnection-point transmission apportioned electric energy (system)).

Of the amount of electric power calculated and transmitted to the grid of the grid power company, the amount of combined generated power (hereinafter referred to as grid-point transmission apportioned power (power plant)) GCPSB23 is

(SP).

Subsequently, the power monitoring control device 16 connects the interconnection point transmission power amount PS1, the generator transmission power amount PS2, and the storage battery discharge power amount PSB obtained in step SP16, and the interconnection point received power amount obtained in step SP16. PR1, generator received power amount PR2 and storage battery charge power amount PRB, storage battery charge power amount (system) LPC, storage battery charge power amount (power plant) GPC, generator direct transmission power amount GPS2, storage battery calculated as described above Based on discharge power amount (system charge) LCPS10, storage battery discharge power amount (generator charge amount) GCPS20, interconnection point transmission apportioning electric energy (system) LCPSB13 and interconnection point transmission apportioning electric energy (power plant) GCPSB23 Then, a quarterly report and an annual report are prepared as necessary (SP19), and this is recorded and stored in a recording device (not shown).

Next, the power monitoring and control device 16 determines, based on the numerical values obtained in step SP18, the power charge bill 35A, the power charge transfer notification 35B and the RPS power charge bill 35C described above with reference to FIGS. Each meter-reading notice 36 (36A to 6E) is created and printed on the printer 24 (FIG. 1), and then the storage battery charge / discharge control process is terminated.

(1-4) Effects of this Embodiment As described above, in the wind power generation system 1 according to this embodiment, the connection point transmission watt-hour meter 30 and the connection point are connected to the connection point side energy measurement point P1. Receiving watt-hour meter 31, generator-side watt-hour measurement point P2, generator transmission watt-hour meter 32 and generator-receiving-power watt-hour meter 33, storage battery-side watt-hour measurement point P3, storage battery discharge watt-hour meter 34, and storage battery charging energy A total of 35 is provided, and these watt hour meters measure the transmission / reception electric energy at the interconnection point side electric energy measurement point P1, the generator side electric energy measurement point P2, and the storage battery side electric energy measurement point P3 for each tidal direction. Thus, based on these measurement results, it is possible to accurately classify the purchased power from other power generation companies and the wind power generated by itself.

(2) 2nd Embodiment In FIG. 1, 40 shows the wind power generation system by 2nd Embodiment as a whole. The wind power generation system 40 is configured in the same manner as the wind power generation system 1 according to the first embodiment, except that the charging / discharging control processing of the storage battery 13 by the power monitoring control device 41 is different.

That is, the storage battery charge / discharge control process according to the first embodiment described above with reference to FIG. 14 is based on the assumption that the purchased power from the power system 14 charging the storage battery 13 is always from the same other power generation company. Yes. However, at present, it is also possible for each power generation company to sell power to other power generation companies using the power system of the power company, and therefore, from a plurality of other power generation companies (including power companies). It is also conceivable to purchase electric power and charge the storage battery 13 with the purchased electric power.

Therefore, in the wind power generation system 40 (FIG. 1) according to the present embodiment, when purchasing power from another power generation company and charging the storage battery 13, the name of the other power generation company (name of the power generation company) and The purchase time is recorded, and based on this information, the purchased power from other power generation companies is measured and classified for each other power generation company.

In addition, about the classification of the other power generation company of the electric power selling source of the charging power to the storage battery 13, when purchasing power from other power generation companies other than the grid power company, from what time to what other power generation business Since a sales contract for how much power is purchased from, for example, is carried out in advance at the Japan Wholesale Power Exchange 19 (FIG. 1), this is done with reference to this.

FIG. 15 shows the specific processing contents of the power monitoring control device 41 related to the storage battery charge / discharge control processing according to this embodiment. The power monitoring control device 41 executes the storage battery charge / discharge control process shown in FIG. 15 according to a corresponding control program stored in an internal memory (not shown).

That is, when the execution instruction of the storage battery charge / discharge control process is input, the power monitoring control device 41 starts the storage battery charge / discharge control process. A power purchase schedule such as how much power is purchased from the business is set internally (SP30). This power purchase schedule may be input by a user operation, or may be created by the power monitoring control device 41 based on data acquired at the time of exchange with the bid server of the Japan Wholesale Power Exchange 19 good.

In addition to this, the power monitoring control device 41 also includes the power amount KR (KR1, KR2) for each pulse of the interconnection point power reception pulse, the generator side power reception pulse, and the charging power pulse described in step SP1 of FIG. , KRB) and the electric energy KS (KS1, KS2, KSB) for each one pulse of the connection point power transmission pulse, the generator-side power transmission pulse, and the discharge power pulse, are set to predetermined values. Further, the power monitoring and control apparatus 41 sets initial values for the counters described above for step SP5, step SP7, step SP8, step SP11, step SP13, and step SP14 in FIG. The parameter n indicating the instrument reading date and time is set to the initial value “1” while being set to “0” (SP30).

Subsequently, the power monitoring control device 41 performs steps SP31 and SP33 to SP45 in the same manner as steps SP3 to SP15 of the storage battery charge / discharge control process according to the first embodiment described above with reference to FIG. Connection point power reception pulse from the connection point transmission watt-hour meter 30, connection point transmission pulse from the connection point power reception watt-hour meter 31, generator-side power reception pulse from the generator transmission power watt-hour meter 32, generator reception Each time a generator-side power transmission pulse from the electric energy meter 33, a charging power pulse from the storage battery discharging energy meter 34, or a discharging power pulse from the storage battery charging energy meter 35 is input, the corresponding counter is incremented by one.

At this time, when the charging power pulse is given from the storage battery charging watt-hour meter 35, the power monitoring and control device 41 follows the power purchase schedule set in step SP1 and generates power from the power selling source of the power purchased at that time. The name of the person and the time at that time are recorded (SP32).

As soon as the counter reading deadline date (the closing date of the month) for reading the count value of each counter is reached, the power monitoring and control device 41, Then, the connection point received power amount PR2, the generator received power amount PR2, the storage battery charging power amount PRB, and the power loss TrlossR in the substation interconnection transformer are calculated (SP46, SP47).

Next, the power monitoring and control device 41 stores the storage battery for each other power generation company purchased for charging the storage battery 13 based on the power purchase schedule set in step SP30 and the power generation company name and time recorded in step SP32. The amount of charge power PRB is classified (SP48).

Subsequently, the power monitoring control device 41 performs the storage battery charging power amount for each other power generation company classified in step SP48 in the same manner as in step SP18 of the storage battery charge / discharge control process according to the first embodiment described above with reference to FIG. (System) LPC, storage battery charge energy (power plant) GPC, generator direct transmission energy GPS2, storage battery discharge energy (system charge) LCPS10, storage battery discharge energy (generator charge) GCPS20, connection point transmission distribution Electric power (system) LCPSB 13 and interconnection point transmission apportioned electric power (power plant) GCPSB 23 are respectively calculated (SP49).

Next, the power monitoring control device 41 processes step SP50 and step SP51 in the same manner as step SP19 and step SP20 in FIG. 14, and eventually ends this storage battery charge / discharge control process.

As described above, in the wind power generation system 40 according to the present embodiment, the name of the power generation company of the power selling source purchased at the time of charging the storage battery 13 and the time are recorded, and the power selling source of the charging power to the storage battery 13 is recorded. Even when purchasing power for charging the storage battery 13 from a plurality of power generation companies in order to classify the power generation companies, it is determined how much power is purchased from which power generation company as the charging power for the storage battery 13 It is possible to classify with high accuracy.

(3) Third Embodiment FIG. 16, which shows the corresponding parts in FIG. 1 with the same reference numerals, shows a wind power generation system 50 according to a third embodiment. In this wind power generation system 50, it is assumed that the electric power stored in the storage battery 13 is used in the wind power generation system 50. Accordingly, the configuration of the electric energy measuring unit 51 and the storage battery 13 by the power monitoring control device 58 are assumed. The content of the charge / discharge control process is different from the wind power generation system 1 according to the first embodiment.

That is, in the case of the present embodiment, as shown in FIG. 17 in which the same reference numerals are assigned to corresponding parts in FIG. A connection point transmission energy meter 30 and a connection point reception energy meter 31, a generator transmission energy meter 32 and a generator reception energy meter 33 that measure the transmission and reception energy at the generator-side energy measurement point P2, In addition to the storage battery discharge watt-hour meter 34 and the storage battery charge watt-hour meter 35 that measure the transmission / reception power amount at the storage battery-side power amount measurement point P3, among the purchased power input from the power system 14, the first power cable 6 and Generator system-side received watt-hour meter for measuring the amount of power flowing to the wind power generator 3 side beyond the connection point PC of the second power cable 8 (hereinafter referred to as the generator-system-side received power amount) 52 is provided There.

In this case, the generator system side received power meter 52 is set between the connection point PC of the first power cable 6 and the second power cable 8 and the interconnection transformer 12, as shown in FIG. Among the connection circuits 53 that connect between the generator system side received power amount measurement point P4 and the storage battery side power amount measurement point P3, the current transformer 54 on the storage battery side power amount measurement point P3 side and the connection The circuit 53 is connected to a connection circuit 57 that connects the auxiliary current transformer 56 disposed between the terminals of the current transformer 55 at the generator system side received power amount measurement point P4. In FIG. 18, only Rφ is shown, but it goes without saying that tφ has a similar circuit configuration.

In the connection circuit 53 configured in this way, the current of the IR2 flowing into the connection point PC of the first power cable 6 and the second power cable 8 from the power system 14 through the interconnection transformer 12. Is the vector ir2 and the vector of the discharge power ISB of the storage battery 13 flowing from the storage battery 13 to the connection point PC is the vector isb, the vector iadd of the amount of power IADD flowing from the connection point PC to the wind power plant 2 side is Next formula

It can be calculated as follows. However, the vector iadd and the vector isb are positive in the direction of the arrow in FIG. 18, and are “0” when negative.

In this case, since the electric energy IADD includes the discharged electric energy ISB of the storage battery 13,
As shown in the figure, the vector iadd of the electric energy Iadd minus the vector isb of the discharge electric energy ISB of the storage battery 13 represents the connection point PC of the first electric power cable 6 and the second electric power cable 8 from the electric power system 14. It becomes the vector amount of the generator system side received power amount IREM that flows into the wind power plant 2 side beyond. However, the vector irem is also positive in the direction of the arrow in FIG.

The above verification examples are shown in FIGS. 19 and 20, the current transformer ratio of each current transformer is set to 1: 1 in order to simplify the description.

The generator system side received energy meter 52 measures the generator system side received power amount IREM as described above, and each time a constant power amount (for example, 1 kW) is measured, one pulse is generated on the generator system side received power pulse. To the power monitoring control device 58.

The power monitoring control device 58 includes a connection point power reception pulse and a connection point power transmission pulse transmitted from the connection point power reception energy meter 30 and the connection point transmission power energy meter 31, respectively, A generator-side power reception pulse and a generator-side power transmission pulse transmitted from the generator transmission power meter 33, respectively, and a charge power pulse and a discharge power pulse transmitted from the storage battery charge power meter 34 and the storage battery discharge power meter 35, respectively. For the generator system side received pulse transmitted from the generator system side received energy meter 52, the number of pulses is cumulatively counted, for example, on a monthly basis.

Further, the power monitoring and control device 58 accumulates each of the connection point power reception pulse, the connection point power transmission pulse, the generator side power reception pulse, the generator side power transmission pulse, the charge power pulse, the discharge power pulse, and the generator system side power reception pulse. Based on the results, the purchased power from other power generation companies and the power generated by own wind power generation are categorized, for example, monthly, and various invoices / notifications 35 (FIG. 3) ) And various meter reading notices 36 (FIG. 3).

FIG. 21 shows specific processing contents of the power monitoring control device 58 relating to charge / discharge control of the storage battery 13 according to the third embodiment. The power monitoring control device 58 executes the storage battery charge / discharge control process shown in FIG. 21 in accordance with a corresponding control program stored in an internal memory (not shown).

That is, when the execution instruction of the storage battery charge / discharge control process is input, the power monitoring control device 58 starts the storage battery charge / discharge control process, and first executes a necessary setting process (SP60).

Specifically, in the same manner as in step SP1 of FIG. 14, the power monitoring control device 58 uses the power amount KR (KR1, KR2, RM2) for each pulse of the connection point power reception pulse, the generator side power reception pulse, and the charging power pulse. KRB) and the electric energy KS (KS1, KS2, KSB) for each one of the interconnection point power transmission pulse, the generator-side power transmission pulse, and the discharge power pulse are set to predetermined values set in advance. Further, the power monitoring control device 58 initializes the count values of the counters described above for step SP5, step SP7, step SP8, step SP11, step SP13 and step SP14 of FIG. 1 and the counter described later for step SP76, respectively. A value “0” is set, and a parameter n indicating the instrument reading date is set to an initial value “1”. Furthermore, the power monitoring control device 58 sets the power amount KDG for one pulse of the generator system side received pulse given from the generator system side received power meter 52 to a predetermined value set in advance.

Subsequently, the power monitoring control device 58 receives the connection point transmission pulse from the connection point transmission energy meter 30, the connection point reception pulse from the connection point reception energy meter 31, and the generator transmission energy meter 32. Generator-side power transmission pulse, generator-side power reception pulse from generator-received watt-hour meter 33, discharge power pulse from storage battery discharge watt-hour meter 34, charge power pulse from storage battery charge watt-hour meter 35, and generator system side reception It waits for any of the generator system side received pulses from the electricity meter 52 to be inputted (SP61).

The power monitoring and control device 58 includes any one of the connection point power transmission pulse, the connection point power reception pulse, the generator side power transmission pulse, the generator side power reception pulse, the discharge power pulse, the charge power pulse, and the generator system side power reception pulse. When such a pulse is input, it is determined whether or not the transmission source of the pulse is any one of the connection point transmission watt-hour meter 30, the generator transmission watt-hour meter 32, and the storage battery discharge watt-hour meter 34 (SP62). .

When the power monitoring control device 58 obtains a positive result in this determination, it performs steps SP63 to SP67 in the same manner as steps SP4 to SP8 in FIG. Further, the power monitoring control device 58 increases the value of the parameter n as necessary, and determines whether or not the value of the parameter n has become a value representing a predetermined counter reading deadline date (SP68), If a negative result is obtained, the process returns to step SP61.

On the other hand, when the power monitoring control device 58 obtains a negative result in the determination at step SP62, it performs steps SP69 to SP72 in the same manner as steps SP10 to SP13 in FIG. Further, when the power monitoring control device 58 obtains a negative result in the determination at step SP71, it determines whether or not the transmission source of the pulse received at step SP61 is the storage battery charging power meter 35 (SP73).

When the power monitoring control device 58 obtains a positive result in this determination, the power monitoring control device 58 increases the count value of the counter corresponding to the storage battery charging power meter 35 by one. Thereafter, the power monitoring control device 58 increases the value of the parameter n as necessary, and determines whether or not the value of the parameter n has become a value representing a predetermined counter reading deadline date ( If a negative result is obtained, the process returns to step SP61.

Further, when the power monitoring control device 58 obtains a negative result in the determination at step SP73, the power monitoring control device 58 increases the count value of the counter corresponding to the generator system side received power meter 52 by 1 (SP76). Thereafter, the power monitoring control device 58 increases the value of the parameter n as necessary, and determines whether or not the value of the parameter n has reached a value representing a predetermined counter reading deadline date (SP77). ) If a negative result is obtained, the process returns to step SP61.

On the other hand, when the power monitoring control device 58 eventually obtains a positive result in the determination at step SP68, step SP75, or step SP77, the count value of the counter corresponding to the connection point transmission power meter 30, the generator transmission power amount By multiplying the count value of the counter corresponding to the total 32 and the count value of the counter corresponding to the storage battery discharge energy meter 34 by the corresponding constant KS1, constant KS2 or constant KSB set in step SP60, respectively. The system transmission power amount PS1, the generator transmission power amount PS2, and the storage battery discharge power amount PSB are calculated.

In addition, the power monitoring control device 58 includes a counter value corresponding to the connection point received power meter 31, a counter value corresponding to the generator received power meter 33, and a counter corresponding to the storage battery charge energy meter 35. Is multiplied by the corresponding constant KR1, constant KR2 or constant KRB set in step SP60, respectively, thereby calculating the interconnection point transmission power amount PR1, the generator transmission power amount PR2 and the storage battery discharge power amount PRB. .

Furthermore, the power monitoring and control device 58 multiplies the count value of the counter corresponding to the generator system side received power meter 52 by the corresponding constant KDG set in step SP60 to obtain the generator system side received power amount PLRG. Calculate (SP78).

Subsequently, the power monitoring and control device 58 calculates the power loss TrlossR in the interconnection transformer 12 by the above-described equation (1) (SP79), and thereafter the interconnection point transmission power obtained as described above. Power amount PS1, generator transmission power amount PS2 and storage battery discharge power amount PSB, interconnection point received power amount PR1, generator received power amount PR2, storage battery charge power amount PRB and generator system side received power amount PLRG, and interconnection Necessary arithmetic processing is executed based on the power loss TrlossR in the transformer 12 (SP80).

Specifically, the power monitoring control device 58 calculates the amount of power (storage battery charge power amount (system)) LPC given from the power system 14 among the amount of power charged in the storage battery 13 as follows:

Of the amount of power charged in the storage battery 13, the amount of combined generated power (storage battery charge power amount (power plant)) GPC is calculated by the above equation (3).

In addition, the power monitoring and control device 58 uses the amount of power discharged from the storage battery 13, the amount of power consumed in the wind power generation system 50 (hereinafter referred to as storage battery discharge power amount (consumption within the power plant)) PSBG, Next formula

Of the amount of power discharged from the storage battery 13, the amount of power transmitted to the power system 14 side via the interconnection point side energy measurement point P <b> 1 (hereinafter referred to as storage battery discharge energy (interconnection) PSBS) is called the following formula:

Calculate with

Furthermore, the power monitoring and control device 58 calculates the amount of power (referred to as generator direct transmission power) GPS2 directly transmitted to the power grid 14 of the grid power company among the combined generated power by the above-described equation (4). To do.

Furthermore, the power monitoring control device 58 calculates the amount of power (storage battery discharge power (system charge)) LCPS 10 corresponding to the charge from the power system 14 among the power discharged from the storage battery 13 by the following formula.

Calculated by

Furthermore, the power monitoring and control device 58 includes a total amount of power (power plant combined transmission power amount (power generation + storage)) GPS 22 for the amount of charge to the storage battery 13 and the direct transmission to the power system 14 by the combined power generated by the following formula: Of the amount of power transmitted to the power grid 14 of the interconnected power company, the apportioned power obtained from the power grid 14 (interconnection point transmission apportioned power (system)) LCPSB 13 and the power grid 14 of the interconnected power company Of the transmitted electric energy, the electric energy of the combined generated electric power (interconnection point transmission apportioned electric energy (power plant)) GCPSB 23 is calculated by the above-mentioned equations (7) to (9), respectively.

Next, the power monitoring control device 58 processes step SP81 and step SP82 in the same manner as step SP19 and step SP20 in FIG. 14, and eventually ends this storage battery charge / discharge control process.

As described above, in the wind power generation system 50 according to the present embodiment, the purchased power input from the power system 14 exceeds the connection point PC of the first power cable 6 and the second power cable 8 and the wind power plant. Since the generator system side received energy meter 52 for measuring the generator system side received energy flowing into the second side is provided in the energy measuring unit 51, the power stored in the storage battery 13 is used for the wind power generation system 50. Even in the case of using the power generator, it is possible to accurately classify the purchased power from other power generation companies and the wind power generated by itself.

(4) Fourth Embodiment In FIG. 16, reference numeral 60 denotes a wind power generation system according to a fourth embodiment as a whole. In the wind power generation system 60, power is purchased from a plurality of other power generation companies (including power companies) and the purchased power is charged in the storage battery 13, and the power stored in the storage battery 13 is used in the wind power generation system 50. Accordingly, the content of the charge / discharge control processing of the storage battery 13 by the power monitoring control device 61 is different from the wind power generation system 50 according to the third embodiment.

That is, in the wind power generation system 60 according to the present embodiment, when power is purchased from another power generation company and the storage battery 13 is charged, the name of the other power generation company (power generation company name) and the time are recorded. In addition, based on this information, electric power purchased from other power generation companies and own wind power generation are classified.

FIG. 22 shows specific processing contents of the power monitoring control device 61 relating to the charging / discharging control processing of the storage battery 13 according to this embodiment. The power monitoring control device 61 executes the storage battery charge / discharge control process shown in FIG. 22 in accordance with a corresponding control program stored in an internal memory (not shown).

That is, when the execution instruction of the storage battery charge / discharge control process is input, the power monitoring control device 61 starts the storage battery charge / discharge control process. First, for example, at the wholesale power exchange 19 (FIG. 1) A power purchase schedule such as how much power is purchased from which power generation company is set internally (SP90).

Similarly to step SP1 in FIG. 14, the power monitoring control device 61 uses the power amount KR (KR1, KR2, KRB) for each pulse of the interconnection point power reception pulse, the generator side power reception pulse, and the charging power pulse. , The power amount KS (KS1, KS2, KSB) for each one pulse of the interconnection point power transmission pulse, the generator side power transmission pulse and the discharge power pulse, and the power amount KDG for one pulse of the generator system side power reception pulse Each is set to a predetermined value. Furthermore, the power monitoring and control device 61 counts each of the counters described above for step SP5, step SP7, step SP8, step SP11, step SP13 and step SP14 in FIG. 14 and the counter described above for step SP77 in FIG. Are each set to an initial value “0”, and a parameter n indicating the instrument reading date and time is set to an initial value “1”. (SP90).

Subsequently, the power monitoring control device 61 receives the connection point transmission pulse from the connection point transmission energy meter 30, the connection point reception pulse from the connection point reception energy meter 31, and the generator transmission energy meter 32. Generator-side power transmission pulse, generator-side power reception pulse from the power-receiving power meter 33, discharge power pulse from the battery discharge power meter 34, charge power pulse from the storage battery charge power meter 35, and generator system side It waits for any of the generator system side received pulses from the received electricity meter 52 to be input (SP91).

Thereafter, the power monitoring control device 61 performs steps SP93 to SP108 in the same manner as steps SP62 to SP77 of the storage battery charge / discharge control processing according to the first embodiment described above with reference to FIG. Each time a power reception pulse, a connection point power transmission pulse, a generator side power reception pulse, a generator side power transmission pulse, a charge power pulse, a discharge power pulse, or a power plant system power reception pulse is input, the corresponding counter is incremented by one.

At this time, when a charge power pulse is given from the storage battery charge watt hour meter 35, the power monitoring control device 61 follows the power purchase schedule set in step SP90 and generates power from the power selling source of the power purchased at that time. The name of the person and the time at that time are recorded (SP92).

When the power monitoring and control device eventually reaches the counter reading deadline date (the closing date of the month) for reading the count value of each counter, the above-mentioned connection point transmission power amount PS1, generator transmission power amount PS2 and storage battery discharge power amount PSB, The connection point received power amount PR2, the generator received power amount PR2, the storage battery charge power amount PRB, the generator system side received power amount PLRG, and the power loss TrlossR in the connection transformer 12 are calculated (SP109, SP110).

Next, the power monitoring and control device 61 charges the storage battery for each other power generation company purchased at the time of charging the storage battery 13 based on the power purchase schedule set in step SP90 and the power generation company name and time recorded in step SP92. The power amount PRB is classified (SP111).

Subsequently, in the same manner as step SP80 in FIG. 21, the power monitoring and control device 61 performs storage battery charge power amount (system) LPC, storage battery charge power amount (power plant) GPC, and storage battery discharge for each power generation company classified in step SP111. Electric energy (consumption in power plant) PSBG, battery discharge electric energy (interconnection point transmission) PSBS, generator direct transmission electric energy GPS2, storage battery discharge electric energy (system charge) LCPS10, battery discharge electric energy (generator charge) GCPS20 Then, the connection point transmission apportioned electric energy (system) LCPSB 13 and the interconnection point transmission apportioned electric energy (power plant) GCPSB 23 are calculated (SP112).

Next, the power monitoring control device 61 processes step SP113 and step SP114 in the same manner as step SP81 and step SP82 in FIG. 21, and eventually ends this storage battery charge / discharge control process.

As described above, in the wind power generation system 60 according to the present embodiment, the name and the time of the power generation company of the purchased power sale source are recorded, and the power generation company of the power sale source of the charging power to the storage battery 13 is recorded. Therefore, when purchasing power from multiple power generation companies and charging the storage battery with the purchased power, it is possible to accurately classify the purchased power from other power generation companies and their own wind power generation. it can.

(5) Other Embodiments In the first to fourth embodiments described above, the power is higher than the connection point PC of the first power cable 6 and the second power cable 8 in the first power cable 6. The wind power generator 3 side from the connection point PC of the first power cable 6 and the first power cable 6 and the second power cable 8 in the first power cable 6, and the first and second in the second power cable 8. As shown in FIG. 3 or FIG. 17, the power amount measuring units 25 and 51 as power amount measuring means for measuring the tidal power amount for each tidal current on the storage battery 13 side than the connection point PC of the

power cables

6 and 8 of FIG. Although the case has been described, the present invention is not limited to this, and various other configurations can be widely applied.

In the first to fourth embodiments described above, the electric power that separates the purchased electric power from other power generation companies and the electric power generated by own wind power generation based on the measurement results of the electric energy measuring units 25 and 51. Although the case where the power

monitoring control devices

16, 41, 58, and 61 that control the overall operation of the wind

power generation systems

1, 40, 50, and 60 are applied as the sorting means has been described, the present invention is not limited to this. For example, such power classifying means may be provided separately from the power

monitoring control devices

16, 41, 58, 61.

The present invention relates to a wind power generation system and can be widely applied to storage battery combined wind power generation systems having various configurations.

Claims

A wind power generation system that outputs constant power to an external power system,
A wind power generator that generates power using wind power;
A storage battery for charging power output from the wind power generator;
A first measurement point and a second measurement point on a first power cable connecting the wind power generator and the external power system, and a second connecting the first power cable and the storage battery. An energy measuring unit for measuring the tidal current energy for each tidal current at the third measurement point on the power cable;
Based on the measurement result at each measurement point by the power amount measurement unit, a power classification unit that classifies purchased power to be purchased from at least one power generation company and generated power generated by the wind power generator, and ,
The first measurement point is located between a connection point between the first power cable and the second power cable and the external power system, and the second measurement point is connected to the connection point. Located between the wind power generator and the third measurement point is located between the connection point and the storage battery,
Wind power generation system.
The power dividing unit is
When charging the storage battery with purchased power purchased from the power generation company, the identification information and purchase time of the power generation company are recorded, and from the power generation company based on the identification information and purchase time of the power generation company. Metering the purchased power of each power generation company,
The wind power generation system according to claim 1.
The power measurement unit
Of the purchased power from the power generation company, measure the amount of power flowing into the wind power generator side beyond the connection point of the first power cable and the second power cable line,
The power dividing unit is
Based on the measurement result by the power amount measurement unit, the purchased power from the power generation company and the generated power generated by the wind power generator are classified.
The wind power generation system according to claim 1.
The power dividing unit is
When charging the storage battery with purchased power purchased from the power generation company, the identification information and purchase time of the power generation company are recorded, and the other power generation company is based on the identification information and purchase time of the power generation company. The wind power generation system according to claim 3, wherein electric power purchased from the plant is metered for each power generation company.