JP6936071B2 - Power generation equipment control method and power generation equipment control device - Google Patents

Description

The present invention relates to a method for controlling a power generation facility and a control device for the power generation facility.

In recent years, there has been a demand for an increase in variable power sources such as solar power and wind power, and a reduction in costs related to adjustments for balancing supply and demand by power transmission and distribution business operators. However, when the variable power source increases, the adjustment power for balancing supply and demand increases, and it is difficult to balance these two social demands. In addition, electricity retailers always need to procure cheap electricity, and when they have to procure high-priced electricity in the time section of the wholesale electricity exchange, they want to temporarily procure electricity to replace it. There are needs and so on. Therefore, there is a technology that can be used as a substitute for this adjustment power or as a power source for wholesale supply of electricity by arbitrarily controlling the power generation and storage batteries installed at the demand location or the demand amount at the demand location. It has been demanded.

By the way, when the electric power generated at the place where electricity is demanded is reverse-flowed to the distribution system, the voltage and heat capacity of the distribution system may exceed the upper limit specified value of the distribution equipment. Stable power supply is achieved by keeping the voltage in the normal range and the heat capacity does not exceed the capacity of the distribution equipment, so reverse power flow from the demand location may impair the stable supply.

In the past, safety was ensured by designing and constructing power transmission and distribution equipment based on the maximum output generated from the capacity of the power generation equipment. Therefore, since the equipment is constructed according to the maximum amount of power generation that does not occur many times a year, the cost burden of the power transmission and distribution business operator and the power generator is not small. In the future, the introduction of power generation facilities such as storage batteries and fuel cells to demand locations will progress, and considering that they will be used as supply and demand adjustment capabilities and wholesale supply power sources, they will be used as they are without strengthening the existing distribution system. Technology is desired. For that purpose, a technique for adjusting the amount of power generation is required so that the voltage and current of the distribution system are kept within an appropriate range.

As a method of monitoring the voltage of the system and adjusting the output of the power generation facility by it, for example, there is a technique described in Patent Document 1. According to this technology, it is possible to control individual power generation facilities (storage batteries) so as not to deviate from the permissible value of the system voltage. However, when considering the use as a supply and demand adjusting power or a wholesale supply power source, there is a problem that the required amount of electric power is determined, and if the output of the power generation facility is reduced, it may become insufficient.

Japanese Patent No. 5633872

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power generation facility control method and a power generation facility control device capable of solving the above problems.

In order to solve the above problems, one aspect of the present invention is a distribution system in which a plurality of sensors are storage batteries in which at least one of a plurality of power generation facilities is provided to a consumer and the plurality of power generation facilities are connected. the voltage at different measurement locations to measure each control unit, the predetermined power at the originating generation facilities is generated, the voltage measured by the sensor exceeds an allowable range of the distribution system is detected In this case, when the measurement result transmitted from the sensor is received and the voltage exceeds the permissible value, the power generation from the storage battery in the power generation facility is stopped, and the power corresponding to the stopped power generation is generated by the voltage. It is a method of controlling a power generation facility, characterized in that each power generation facility is controlled so as to supplement the power generation by another one or a plurality of the storage batteries in any part of the distribution system which is equal to or less than an allowable value.

Further, in one aspect of the present invention, the plurality of sensors are storage batteries in which at least one of the plurality of power generation facilities is provided to the consumer, and the current at different measurement locations of the distribution system to which the plurality of power generation facilities are connected. each measured, control unit, the predetermined power at the originating generation facilities is generated from the sensor when the current measured by the sensor exceeds an allowable range of the distribution system is detected receiving a measurement result transmitted, the power from the battery of the power plant when the current exceeds the allowable value is stopped, the power corresponding to the power generation electric power said stop, said current is less than the allowable value A method for controlling a power generation facility, which comprises controlling each power generation facility so as to supplement the power generation by generating power from the other one or a plurality of the storage batteries in any part of the power distribution system.

Further, in one aspect of the present invention, at least one of the plurality of power generation facilities is a storage battery provided to the consumer, and the voltage or current at each of the different measurement locations of the distribution system to which the plurality of power generation facilities are connected can be measured. When a predetermined power is generated by the measuring unit to be measured and one or more of the power generation facilities, and it is detected that the voltage or current measured by the measuring unit exceeds the allowable range of the distribution system, the measurement is performed. receiving a measurement result transmitted from the part, to limit the power of the previous SL-acid battery that corresponds to箇plant exceeds the allowable range, the power corresponding to the power generation electric power the limit, exceeds the allowable range distribution the system is a control device for power generation equipment and a control unit for controlling the storage battery to compensate by causing the power generation in the previous SL-acid battery that corresponds to箇office said voltage or said current is below the allowable range at different power distribution system.

According to each aspect of the present invention, it is possible to secure the electric power provided by the plurality of power generation facilities connected to the distribution system and control the voltage and current of the distribution system so as not to deviate from the permissible values.

It is a schematic diagram which shows the structural example of the control system of the power generation facility which concerns on one Embodiment of this invention. FIG. 5 is a block diagram showing a configuration example of the integrated control device 2, the information collection / control device 62, and the storage battery facility 63 shown in FIG. It is a schematic diagram which shows the structural example of the distribution system A4 shown in FIG. It is a schematic diagram which shows the other configuration example of the distribution system A4 shown in FIG. It is a figure which shows the basic configuration example and the operation example of the control device of the power generation facility which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing a configuration example of a power generation equipment control system (power generation equipment control device) 1 (hereinafter referred to as a control system 1) according to an embodiment of the present invention.

The control system 1 shown in FIG. 1 includes an integrated control device 2, an information collection / control device 62 installed in a plurality of demand areas 6 such as a house, and electrical equipment for generating, storing, and loading electric power, and integrated control. It is provided with communication equipment for connecting the device 2 and the plurality of information collection / control devices 62.

In FIG. 1, as the electric equipment installed in the demand area 6, the storage battery equipment 63, the solar power generation equipment 64, and the electric power load equipment 65 are illustrated. These storage battery equipment 63, photovoltaic power generation equipment 64, and power load equipment 65 are connected to the distribution system A4 or the distribution system B5 via the power line 66 and the distribution board 61. However, each demand area 6 may be provided with all of the storage battery facility 63, the photovoltaic power generation facility 64, and the power load facility 65, or may be provided with any one or two of them. The storage battery facility 63 includes a storage battery, for example, a power conversion circuit such as an inverter and a converter for controlling discharge from the storage battery and charging of the storage battery, a control circuit, and the like. The photovoltaic power generation facility 64 includes a solar cell module, a conversion circuit such as a power conditioner that converts the output of the solar cell into predetermined DC power or AC power, a control circuit, and the like. The conversion circuit and control circuit of the power conditioner of the photovoltaic power generation facility 64 and the power conversion circuit of the inverter, converter and the like of the storage battery facility 63 may be integrally configured. The power load facility 65 includes one or more electrical devices and the like.

In the present embodiment, the power generation equipment is equipment that generates electric power, such as a storage battery equipment 63 and a solar power generation equipment 64. Examples of the power generation equipment include a fuel cell, a gas engine generator, a diesel engine generator, a wind power generation, and the like, in addition to the storage battery equipment 63 and the solar power generation equipment 64. The demand area 6 may be provided with, for example, one or a plurality of types of power generation facilities.

In the present embodiment, among the power generation facilities, those that can be controlled such as operation or stop, output adjustment, etc. are targeted for control. Further, as described above, the power generation facility may be a power generation facility installed in the demand area 6 (demand location) where the power load facility 65 is installed, or a demand area where the power load facility 65 is not installed. It may be a power generation facility installed independently in 6. That is, in the present embodiment, the demand area 6 includes an installation location where the power load facility 65 is not installed. The demand area 6 corresponds to a “demand location” among the components of the power plant → (transmission line) → substation → (distribution line) → demand location that constitutes the power system.

Further, the communication equipment has a communication network 3 such as the Internet, and a plurality of communication lines 8 connecting the integrated control device 2 and the communication network 3 and the information collection / control device 62 and the communication network 3.

The distribution system A4 includes a distribution substation 11, a distribution line, distribution equipment, and the like. Distribution lines include, for example, high voltage distribution lines and low voltage distribution lines. The distribution line includes, for example, an overhead distribution line in which an electric wire is laid on a utility pole and an underground distribution line in which a cable is buried in the ground. Distribution equipment includes distribution transformers (power receiving transformers and pole transformers), switches, drop lines 7, watt-hour meters, and the like. Further, the distribution system B5 includes a distribution substation 12 and a distribution line, a distribution facility, and the like similar to the distribution system A4. The distribution system A4 and the distribution system B5 are provided with a voltage sensor or a current sensor that detects a voltage or a current flowing through a distribution line or a drop line 7 at a predetermined one or a plurality of locations, for example.

Next, a configuration example of the integrated control device 2, the information collection / control device 62, and the storage battery facility 63 shown in FIG. 1 will be described with reference to FIG. FIG. 2 shows a configuration related to information processing and communication possessed by the integrated control device 2, the information collection / control device 62, and the storage battery facility 63 shown in FIG. 1, and the flow of information between the configurations. The integrated control device 2 shown in FIG. 2 includes a data receiving unit 21, a controlled quantity calculation unit 22, and a control command value transmitting unit 23. The information collection / control device 62 includes a power information receiving unit 621, a data transmitting unit 622, a control command value receiving unit 623, a control amount calculation unit 624, and a control command value transmitting unit 625. The information collection / control device 62 is, for example, a HEMS (Home Energy Management System) control device. However, the control amount calculation unit 624 may be omitted. Further, the storage battery equipment 63 includes a control command value receiving unit 631, a control unit 632, and a storage battery state transmitting unit 633.

In the configuration example shown in FIG. 2, the power information receiving unit 621 receives, for example, the measurement results of the voltage and current of the drop line 7 from the distribution board 61. Further, the power information receiving unit 621 measures the measurement result of the power flowing forward from the distribution system A4 or the distribution system B5 or the power flowing backward to the distribution system A4 or the distribution system B5 from the distribution board 61, for example, via the service line 7. Receive the information shown. The power information receiving unit 621 also receives information indicating the state of the storage battery, such as the remaining charge of the storage battery equipment 63 and the value of the charge / discharge power, from the storage battery state transmission unit 633. The data transmission unit 622 transmits, for example, the information received by the power information reception unit 621 from the distribution board 61 or the storage battery state transmission unit 633 to the data reception unit 21 at predetermined time intervals.

The data receiving unit 21 receives the information transmitted by the data transmitting unit 622. In addition, the data receiving unit 21 receives information indicating a request for power supply from a server or the like of a power transmission and distribution business operator or a retail electric power company (not shown), or receives information indicating the state of voltage, current, or the like of the distribution system. Received as system information. The data receiving unit 21 outputs the received information to the control amount calculation unit 22.

As will be described later, the control amount calculation unit 22 calculates the control command value of the discharge power (or charge / discharge power) of the storage battery facility 63 at predetermined time intervals based on the information input from the data reception unit 21. The calculated result is output to the control command value transmission unit 23. The control command value may be a value indicating a control command value of the discharge power amount (or charge / discharge power amount) from the storage battery equipment 63. When a power generation facility other than the storage battery facility 63 is to be controlled, the control command value calculated by the control amount calculation unit 22 is a value indicating the control command value of the generated power (or the generated power amount). The control command value transmitting unit 23 transmits, for example, information indicating a control command value of the discharge power of the storage battery equipment 63 to the control command value receiving unit 623.

The control command value receiving unit 623 receives information indicating the control command value of the discharge power of the storage battery equipment 63 from the control command value transmitting unit 23, and outputs the information to the control command value transmitting unit 625. The control command value transmitting unit 625 transmits information indicating the control command value of the discharge power of the storage battery equipment 63 input from the control command value receiving unit 623 to the control command value receiving unit 631.

The control command value receiving unit 631 outputs information indicating the control command value of the discharge power of the storage battery equipment 63 received from the control command value transmitting unit 625 to the control unit 632. The control unit 632 controls the discharge power of the storage battery equipment 63 based on the information indicating the control command value of the discharge power of the storage battery equipment 63 input from the control command value receiving unit 631.

Further, the control amount calculation unit 624 inputs, for example, the information received by the power information reception unit 621, and based on the input information, the discharge power of the storage battery equipment 63 controlled by the own device instead of the control amount calculation unit 22. Calculates the control command value of. The control command value transmission unit 625 transmits the control command value output by the control amount calculation unit 624 or the control command value transmitted by the control command value transmission unit 23 to the control command value reception unit 631. When the storage battery equipment 63 is controlled based on the control command value output by the control amount calculation unit 624, the data transmission unit 622 indicates the control content so that the integrated control device 2 can recognize the control state. Information is transmitted to the data receiving unit 21.

In the present embodiment, the control amount calculation unit 22 calculates the control command value of the discharge power of the storage battery equipment 63 by the calculation method shown in any of the following (1) to (7), for example. In (1) to (7), a method of calculation by the control amount calculation unit 22 will be described with the storage battery equipment 63 as the power generation equipment and the discharge power control command value as the power generation amount control command value. Here, the control command value of the generated power amount may be the control command value of the generated power or the control command value of the generated power amount.

(1) For example, the control amount calculation unit 22 first inputs from the data reception unit 21 the result of measuring the voltage of the distribution system to which a plurality of power generation facilities are connected at one or a plurality of points. Next, the control amount calculation unit 22 stops the power generation of the power generation equipment when the voltage exceeds the permissible value when the power generation equipment is generated at the maximum value (kW) that can be output, and the stopped power generation power. Calculate the control command value of the amount of power generation for each power generation facility so that each power generation facility can be controlled so that the power equivalent to the above can be supplemented by generating power with one or more other power generation facilities whose voltage is less than the permissible value. do.

(2) Alternatively, the control amount calculation unit 22 first inputs from the data reception unit 21 the result of measuring the voltage of the distribution system to which the plurality of power generation facilities are connected at one or a plurality of points. Next, the control amount calculation unit 22 reduces the power generation of the power generation facility when the voltage exceeds the permissible value when the power generation facility is generated at the maximum value (kW) that can be output, and the reduced power generation is performed. The control command value of the amount of power generation for each power generation facility is set so that each power generation facility can be controlled so that the power equivalent to the power can be supplemented by generating power with one or more other power generation facilities whose voltage is less than the permissible value. Calculate.

(3) Alternatively, the control amount calculation unit 22 first inputs from the data reception unit 21 the result of measuring the current of the distribution system to which the plurality of power generation facilities are connected at one or a plurality of points. Next, the control amount calculation unit 22 stops the power generation of the power generation equipment when the current exceeds the permissible value when the power generation equipment is generated at the maximum value (kW) that can be output, and the stopped power generation power. Calculate the control command value of the amount of power generation for each power generation facility so that each power generation facility can be controlled so that the power equivalent to the above can be supplemented by generating power with one or more other power generation facilities whose current is less than the permissible value. do.

(4) Alternatively, the control amount calculation unit 22 first inputs from the data reception unit 21 the result of measuring the current of the distribution system to which the plurality of power generation facilities are connected at one or a plurality of points. Next, the control amount calculation unit 22 reduces the power generation of the power generation facility when the current exceeds the permissible value when the power generation facility is generated at the maximum value (kW) that can be output, and the reduced power generation is performed. The control command value of the amount of power generation for each power generation facility is set so that each power generation facility can be controlled so that the power equivalent to the power can be supplemented by generating power with one or more other power generation facilities whose current is less than the permissible value. Calculate.

(5) Alternatively, the control amount calculation unit 22 first inputs from the data receiving unit 21 the result of measuring the current flowing on the distribution system in which a plurality of power generation facilities are installed on the same distribution system. Next, when the measured current value exceeds the permissible value of the distribution system, the control amount calculation unit 22 reduces the overall output of the plurality of power generation facilities so as to be equal to or less than the permissible value, and lowers the output. A control command for the amount of power generated for each power generation facility so that the power equivalent to the generated power can be supplemented by generating power with one or more power generation facilities installed on another distribution system whose current is less than the permissible value. Calculate the value.

(6) In the process of (5), the control amount calculation unit 22 reduces the overall output by stopping some of the power generation facilities installed on the same distribution system. , It is possible to calculate the control command value of the amount of power generation for each power generation facility.

(7) Further, in the process of (5), the control amount calculation unit 22 can reduce the overall output by adjusting the output of each of the plurality of power generation facilities installed on the same distribution system. It is possible to calculate the control command value of the amount of power generation for each power generation facility.

In the present embodiment, the voltage or current of the distribution system can be measured, for example, as follows. That is, for example, the voltage or current of the distribution system can be measured in the vicinity of the point where the service line 7 connected to the distribution system A4 or B5 is drawn indoors and connected to the distribution board 61. The voltage can be measured by a voltage sensor for the interphase voltage, and the current can be measured by a current sensor such as a CT (current transformer). In recent years, there are distribution boards equipped with a voltage / current measurement function, and there are some that can transmit measurement value information to the outside with a LAN (local area network) communication cable, and this may be utilized.

The maximum output value (kW) is the rated maximum output value of the power generation facility. However, for generators that require fuel, such as gas engine generators, read by replacing with the output that maximizes the fuel consumption rate.

The allowable value of voltage refers to the allowable value provided for stabilizing the quality of electric power, and generally, the values specified as 202V ± 20V and 101V ± 6V in the Electricity Business Act Enforcement Regulations are used. It is not limited to.

The permissible current value is the permissible value of the current value that does not pose a problem in the safety of distribution equipment, and is determined by the type and thickness of the electric wire cable. In this claim, since the measurement is made at the place of demand or the lead-in point of the power generation facility, it refers to the permissible current value of the lead-in line.

Further, in (5), the term “on the same distribution system” refers to a section from the distribution substations 11 and 12 on the demand side where the current value is to be controlled. For example, when a branch line is branched from a certain distribution system, multiple power generation facilities are connected to the branch line, and the current value of the branch line is measured, the control section of the branch line is on the same distribution system. To say. When the current value before branching to the branch line is measured and controlled based on the measured value, it refers to the control section from the section before branching to the branch line. In this case, the allowable value of the current is the allowable value of the current value that does not pose a problem in the safety of the distribution equipment, and is determined by the type and thickness of the electric wire cable, the specifications of the transformer, and the like. Further, in (5), since the measurement is performed on a distribution system to which a plurality of demand locations and power generation facilities are connected, it is determined by the smallest allowable current value among the distribution system devices such as service lines, transformers, and switches.

The outline of the control in the control system 1 is as follows. In the present embodiment, a plurality of demand areas (houses) 6 in which the photovoltaic power generation equipment 64 and the storage battery equipment 63 are installed are connected to the distribution system A4 or the distribution system B5. In recent years, the capacity of residential photovoltaic power generation equipment has been increasing, and it is not uncommon for the rated output to be 6 kW or more. When a power transmission and distribution business operator or an electric power retailer requests the provision of electricity at a certain time, the electricity is supplied from the installed storage battery. Then, if this is during the daytime on a sunny day, in addition to the surplus power of the photovoltaic power generation, the storage battery power will also be reverse-flowed to the distribution system. Since the amount of power that flows backward is large, there is a concern that the voltage will exceed the permissible value at the interconnection point between the house and the grid, or that the current permissible value of the power lead-in line to the house will be exceeded. In addition, if there are a plurality of such houses, there is a risk that the current will exceed the permissible value in the entire distribution system to which the houses are connected. Therefore, in the present embodiment, the amount of power supplied from the storage battery is suppressed so that the voltage and current values of the distribution system are kept in an appropriate range, and the insufficient power is collected by the storage battery in another demand area (= power generation area). It is supplemented by discharging from.

In each demand area (= power generation area, house) 6, the distribution system A4 or B5 is connected to each power generation facility or power load facility via a power line 66 via a main switch or the like on a distribution board 61. The current sensor and the voltage sensor are installed in the distribution board 61, and are measured near the end of the service line 7 from the distribution system A4 or B5. As mentioned above, in recent years, there is also a distribution board with a built-in sensor, and it is conceivable to utilize this. With these sensors, it is possible to measure forward power flow power from the distribution system A4 or B5, reverse power flow power to the system, voltage, and the like.

The data acquired by this sensor is sent to the information collection / control device 62 by the communication line 67, and the information collection / control device 62 receives this data at the power information receiving unit 621. For example, a home LAN is used for communication. The data received by the power information receiving unit 621 includes voltage and current data, as well as power consumption and solar power generation, and the charging state, dischargeable amount, and charging from the storage battery state transmitting unit 633 built in the storage battery facility 63. Operation information such as / discharge / stop is sent. These data are transmitted from the data transmission unit 622 to the integrated control device 2.

In the integrated control device 2, in addition to these data, when a power transmission and distribution business operator or a retail electric power company requests power supply, data such as the time, time, and power to be provided is sent, and this is sent to the data receiver. Receive at 21. Further, as for the data from the information collection / control device 62, not only the data of a specific demand area but also the data is sent from a plurality of demand areas (houses) 6. The frequency can be, for example, 1 minute intervals. The control amount calculation unit 22 of the integrated control device 2 calculates from the data received by the data reception unit 21 how much output should be discharged from the storage battery equipment 63 of which demand area (house) 6. Considering the inverter loss of the storage battery equipment 63, it is preferable to calculate so as to discharge at the most efficient output, that is, the rated output. In addition, it is desirable to select a storage battery that discharges only to the minimum necessary, rather than discharging from all houses. At the time of power supply, the control command value transmission unit 23 transmits the result to the information collection / control device 62 of each demand area (house) 6.

The information collection / control device 62 receives this at the control command value receiving unit 623 and transmits it from the control command value transmitting unit 625 to the storage battery equipment 63.

In the storage battery equipment 63, the control command value receiving unit 631 receives this information, and the control unit 632 discharges according to the command value. At the end time of power supply, the integrated control device 2 similarly issues a command to stop the discharge from the storage battery equipment 63, and the storage battery equipment 63 stops the discharge via the information collection / control device 62.

The operation of the control system 1 when a voltage or current that reaches the allowable voltage value or the allowable current value is detected is as follows.

<When the upper limit voltage value is detected>
When discharging from the storage battery equipment 63 is started, or while the storage battery equipment 63 is discharging, the voltage measured by the voltage sensor in the distribution board 61 at a certain demand area (house) 6 is the distribution system A4. Or, when it is detected that the upper limit of the allowable range of B5 is exceeded, the voltage value data is transmitted to the integrated control device 2. The control amount calculation unit 22 of the integrated control device 2 stops the discharge from the storage battery equipment 63 of the demand area (house) 6 or suppresses the discharge output, and the amount equivalent to the electric power is used by the other demand area (house) 6. Calculate to discharge from the storage battery equipment 63. This result is transmitted from the control command value transmission unit 23 to the storage battery equipment 63 via the information collection / control device 62 and operated.

If the information collection / control device 62 is provided with the control amount calculation unit 624 to stop the discharge from the storage battery equipment 63 or suppress the output due to the voltage rise, each demand area (house) without giving information to the integrated control device 2. ) 6 can be executed. Alternatively, the storage battery equipment 63 may be provided with a power information receiving unit and a control amount calculation unit. In these cases, the data of the storage battery whose discharge is stopped or whose output is suppressed is transmitted from the data transmission unit 622 of the information collection / control device 62 to the integrated control device 2, and the control amount calculation unit 22 of the integrated control device 2 transmits the data. It is compared with the power supply request amount, and the shortage is calculated to be discharged from the storage battery facility 63 of the other demand area (house) 6.

<When the upper limit current value is detected>
When it is detected that the current measured by the current sensor in the distribution board 61 exceeds the upper limit of the allowable range of the distribution system A4 or B5 in a certain demand area (house) 6, and when the upper limit voltage value is detected. The same measures are taken, but when the current increases in the entire system due to discharge from multiple demand areas (houses) 6 on the same distribution system, decrease in demand, increase in solar power generation, etc., the distribution board 61 The current sensor inside cannot detect it. In that case, the information of the current sensor installed on the distribution system A4 or B5 will be used. This information can be considered as system information, for example, transmitted by a power transmission and distribution business operator and received by the data receiving unit 21 of the integrated control device 2. This system information may be a measurement point, an upper limit value of a current, a measured current value, or an amount that lowers the tidal current at the point. Now, when the current value is about to reach the upper limit in the distribution system A4, the control amount calculation unit 22 of the integrated control device 2 provides system information of the distribution system A4 / B5 / ... and each demand area (house) 6 The storage battery equipment 63 to be suppressed and its amount are calculated from the position information of the storage battery equipment 63 and the discharge output from the storage battery equipment 63 of each demand area (house) 6, and the amount of electric power corresponding to the suppressed amount is, for example, a margin in the current value. It is calculated to discharge from the storage battery facility 63 of the demand area (house) 6 connected to a certain distribution system B5.

As described above, according to the present embodiment, when utilizing the power generation equipment arranged in the distribution system, the power generation amount of the power generation equipment is limited so as not to cause a problem while observing the voltage value and the current value of the distribution system. Moreover, it is possible to operate the power generation equipment in the demand area that does not cause a problem. According to this, it is possible to control the voltage value and the current value to be less than the permissible value, and to provide a predetermined amount of electric power as a supply and demand adjusting force and a wholesale supply power source.

Next, a modified example of the control system 1 shown in FIG. 1 (referred to as the control system 1a) will be described as an embodiment of the present invention with reference to FIG. In the control system 1a shown in FIG. 3, a configuration example of a power generation facility or the like connected to the distribution system A4 shown in FIG. 1 is modified. Note that, in FIG. 3, a modified portion from the configuration example shown in FIG. 1 is shown, and some of the same configurations of the integrated control device 2 and the like are omitted. Further, in FIG. 3, the same reference numerals are used for the same or corresponding configurations as those shown in FIG. In the control system 1a shown in FIG. 3, the distribution system A4 includes a plurality of utility poles 43, a high-voltage distribution line 41, a pole transformer 44, a low-voltage distribution line 42, and a drop line 7. In the demand area (house) 6, the service line 7 connected to the low-voltage distribution line 42 is connected to the main switch 612 in the distribution board 61 via the watt hour meter 68. Further, a storage battery facility 63, which is a power generation facility, is connected to the distribution board 61. The distribution board 61 has a measuring unit 611, and the measuring unit 611 measures the interphase voltage and the phase current of the drop line 7 in the distribution board 61.

Further, the control system 1a shown in FIG. 3 includes a large storage battery facility 9 as a power generation facility connected to the distribution system A4. The large storage battery equipment 9 includes a storage battery, a conversion circuit such as an inverter and a converter, a control circuit, and a voltage / current sensor 91 inside. The voltage / current sensor 91 measures the interphase voltage and the phase current of the drop line 104, and transmits information indicating the measurement results to, for example, the integrated control device 2 shown in FIG. The drop line 104 is connected to the drop line 71 connected to the high-voltage distribution line 41 via the instrument transformer current transformer 102 installed on the premises No. 1 pillar 101. A watt-hour meter 103 is connected to the instrument transformer current transformer 102. The large storage battery facility 9 causes electric power to flow forward or reverse to the high-voltage distribution line 41 via the service line 104.

According to the control system 1a shown in FIG. 3, the following effects can be obtained as in the control system 1 shown in FIG. That is, in the control system 1a shown in FIG. 3, when utilizing the power generation facilities such as the storage battery facility 63 and the large storage battery facility 9 arranged in the distribution system A4, there is a problem while observing the voltage value and the current value of the distribution system A4. It is possible to limit the amount of power generated by the power generation equipment so that the power generation equipment does not become a problem, and to operate the power generation equipment in the demand area where there is no problem. According to this, it is possible to control the voltage value and the current value to be less than the permissible value, and to provide a predetermined amount of electric power as a supply and demand adjusting force and a wholesale supply power source.

Next, with reference to FIG. 4, another modification of the control system 1 shown in FIG. 1 (referred to as the control system 1b) will be described as an embodiment of the present invention. In the control system 1b shown in FIG. 4, the configuration of the measuring unit for measuring the current of the distribution system A4 shown in FIG. 1 is modified. Note that FIG. 4 illustrates a modified portion from the configuration example shown in FIG. 1, and a part of the same configuration of the integrated control device 2 and the like is omitted. Further, in FIG. 4, the same reference numerals are used for the same or corresponding configurations as those shown in FIG. In the control system 1b shown in FIG. 4, the distribution system A4 includes a plurality of utility poles 43, a high-voltage distribution line 41, a pole transformer 44, a low-voltage distribution line 42, and current sensors 45-1 and 45-2. It is provided with a plurality of drop lines 7. In the demand area (house) 6, the service line 7 connected to the low-voltage distribution line 42 is connected to the storage battery facility 63, which is a power generation facility, via the distribution board 61. The current sensor 45-1 detects the current flowing through the high-voltage distribution line 41 at a position closer to the power generation system, and the current sensor 45-2 detects the current flowing through the high-voltage distribution line 41 at a position farther from the power generation system than the current sensor 45-1. do. In the control system 1b, for example, each distribution board 61 can measure the current flowing through the drop line 7, and the current sensors 45-1 and 45-2 can measure the current flowing through the distribution line at predetermined sections.

According to the control system 1b shown in FIG. 4, the following effects can be obtained as in the control system 1 shown in FIG. That is, in the control system 1b shown in FIG. 4, when utilizing the plurality of storage battery facilities 63 arranged in the distribution system A4, the power generation amount of the power generation facility is limited so as not to cause a problem while observing the current value of the distribution system A4. However, it is possible to operate the power generation equipment in the demand area that does not pose a problem. According to this, it is possible to control the current value to be less than the permissible value and to provide a predetermined amount of electric power as a supply and demand adjusting force or a wholesale supply power source.

Next, the basic configuration of the embodiment of the present invention will be described with reference to FIG. FIG. 5A is a block diagram showing a basic configuration example of a control device for a power generation facility according to an embodiment of the present invention. FIG. 5B is a blow chart showing an operation example of the control device 200 of the power generation facility shown in FIG. 5A. The control device 200 of the power generation facility shown in FIG. 5A includes a measurement unit 201 and a control unit 202. The control device 200 of the power generation facility repeatedly executes the process shown in FIG. 5B at a predetermined cycle.

The measuring unit 201 measures the voltage or current of the distribution system to which a plurality of power generation facilities are connected at one or a plurality of points (step S1). When the measured voltage or current exceeds the permissible value when the control unit 202 generates a predetermined power with one or more power generation facilities, the control unit 202 generates power of one or more power generation facilities corresponding to the portion exceeding the permissible value. (Step S2), and each power generation facility is controlled so that the power corresponding to the limited power generation power is supplemented by generating power with one or more power generation facilities corresponding to locations where the voltage and current are below the permissible values. (Step S3). Here, the predetermined electric power is, for example, an output at which the rated output or efficiency of each power generation facility is equal to or higher than a predetermined value. In addition, the limitation of power generation includes stopping power generation (discharge) and reducing the generated power (discharge power). Further, the location is, for example, a distribution board 61, a service line, a service port for the service line, a predetermined section of the distribution line, or the like. In addition, the power generation equipment corresponding to the location is the power generation equipment connected to the distribution board when the location is a distribution board, and the location is a drop line, a service port for the service line, a predetermined section of the distribution line, etc. In some cases, it is a power generation facility connected to those locations.

The correspondence between the configuration shown in FIG. 5 and the configuration shown in FIGS. 1 to 4 is as follows. That is, the control device 200 of the power generation facility corresponds to the control systems 1, 1a and 1b shown in FIGS. 1 to 4. The measuring unit 201 corresponds to the measuring unit 611 shown in FIG. 3, the voltage / current sensor 91, and the current sensors 45-1 and 45-2 shown in FIG. The control unit 202 corresponds to the integrated control device 2, the information collection / control device 62, and the storage battery facility 63 shown in FIG.

According to the power generation equipment control device 200 shown in FIG. 5, when utilizing the power generation equipment arranged in the distribution system (not shown in FIG. 5), there is no problem while observing the voltage value and the current value of the distribution system. It is possible to limit the amount of power generated by the power generation equipment and operate the power generation equipment in the demand area where there is no problem. According to this, it is possible to control the voltage value and the current value to be less than the permissible value, and to provide a predetermined amount of electric power as a supply and demand adjusting force and a wholesale supply power source.

The control method of the power generation facility and the control device of the power generation facility, which are the embodiments of the present invention, have been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and the present invention. It also includes designs that do not deviate from the gist of.

1, 1a, 1b: Control system, 2: Integrated control device, 4: Distribution system A, 5: Distribution system B, 6: Demand area (house), 7, 71, 104: Drop line, 22, 624: Control amount calculation Unit, 45-1, 45-2: Current sensor, 61: Distribution board, 62: Information collection / control device, 63: Storage battery equipment, 91: Voltage / current sensor, 200: Power generation equipment control device, 201, 611 : Measurement unit, 202, 632: Control unit

Claims (3)

A plurality of sensors, at least one of the plurality of power generation equipment to measure the voltage at different measurement locations distribution system in which the plurality of power generation equipment to a storage battery provided in the customer is connected,
Control unit, the predetermined power at the originating generation facilities is generated, measurement results received from the sensor when the voltage measured by the sensor exceeds an allowable range of the distribution system is detected receives the power from the battery of the power plant when the voltage exceeds the permissible value is stopped, the power corresponding to the power generation electric power said stop, one of the said voltage is equal to or less than the allowable value the power distribution system A method for controlling a power generation facility, which comprises controlling each power generation facility so as to supplement the power generation by generating power from the other one or a plurality of the storage batteries at the location. A plurality of sensors, at least one of the plurality of power generation equipment to measure the current at different measurement locations distribution system in which the plurality of power generation equipment is connected to a storage battery provided in the customer respectively,
Control unit, the predetermined power at the originating generation facilities is generated, measurement results received from the sensor when the current measured by the sensor exceeds an allowable range of the distribution system is detected receives the power from the battery of the power plant when the current exceeds the allowable value is stopped, the power corresponding to the power generation electric power the stop, any of the current is equal to or less than the allowable value the power distribution system A method for controlling a power generation facility, which comprises controlling each power generation facility so as to supplement the power generation by generating power from the other one or a plurality of the storage batteries at the location. A measuring unit that measures voltage or current at different measurement locations of a distribution system to which at least one of a plurality of power generation facilities is a storage battery provided in a customer and the plurality of power generation facilities are connected.
Measurement transmitted from the measuring unit when it is detected that a predetermined electric power is generated by one or more of the power generation facilities and the voltage or current measured by the measuring unit exceeds the permissible range of the distribution system. It receives the results, limiting the power of the previous SL-acid battery that corresponds to箇plant exceeds the allowable range, different distribution system and distribution system the power corresponding to the power generation electric power the limit, exceeds the allowable range power generation equipment of a control device and a said voltage or the control unit in which the current to control the battery so to compensate by causing the power generation in the previous SL-acid battery that corresponds to the following箇plant tolerance in.

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