JP6981177B2 - Distribution system management support system and distribution system management support method - Google Patents

Description

The present invention relates to a distribution system management support system and a distribution system management support method for supporting management of a distribution system.

In the conventional distribution system, the power generated at the power plant is supplied to the consumer's house via the substation, high-voltage line, transformer, low-voltage line, low-voltage service line, etc., so the flow of electric power is unidirectional. However, since the current distribution system is interconnected with a photovoltaic power generation system installed in a consumer's house and distributed power sources such as a photovoltaic power plant and a wind power plant, power flows toward the substation. Reverse power flow may occur. Therefore, in the conventional distribution system equipment construction, only the power consumption of consumers was considered, but in the current distribution system equipment construction, it is necessary to consider the reverse power flow from the distributed power source.

In order to grasp the state of the distribution system, a switch having a voltage or current measurement function is installed on the high-voltage line (see, for example, Patent Document 1). In the construction of distribution system equipment, the voltage and current values measured by this switch are used to study the capacity selection of distribution equipment.

Japanese Unexamined Patent Publication No. 09-140074

However, although the number of switches with measurement functions is increasing, the number of switches installed is limited to a few for one high-voltage line, so the distribution is widely spread only by the measured values of the switches. It is not possible to grasp all the state of the system.

Therefore, an object of the present invention is to provide a distribution system management support system and a distribution system management support method capable of accurately grasping the state of the entire distribution system spread over a wide area and supporting the management of the distribution system. do.

In order to solve the above problems, the invention of claim 1 is a distribution system management support system for supporting the management of a distribution system in which a consumer's house and a distributed power supply are connected via a distribution line. A smart meter, which is arranged in a consumer's house and each distributed power supply and has a function of measuring the current value on the distribution line side, is freely connected to the smart meter and is connected to the current on the distribution line side from the smart meter. Support information for generating management support information including a meter management device that acquires a value and a current value and a current direction at an arbitrary point of the distribution system based on the current value acquired by the meter management device. Input the generation means, the display means for displaying the system diagram of the distribution system, any support point requiring management support on the system diagram of the distribution system, and the support item indicating the support content for the support point. The support information generation means is provided with an input means for inputting an arbitrary section or an arbitrary bank on the system diagram as the support point, and the arbitrary section or the arbitrary bank as the support item. When the determination of whether or not the generator can be connected to is requested, the arbitrary section or the arbitrary bank is a forward current based on the current value of the arbitrary section or the arbitrary bank and the current direction. In this case, it is determined that the generator can be connected, and if the arbitrary section or the arbitrary bank has a reverse current, it is determined that the generator cannot be connected, and the display means is used. It is characterized in that the determination result is displayed.

According to the present invention, when support is required for the management of the distribution system, the current value on the distribution line side is acquired from the smart meters arranged in each consumer's house and each distributed power source by the meter management device. do. The support information generation means generates management support information including a current value at an arbitrary point in the distribution system and a current direction based on the current value acquired by the meter management device.

The invention of claim 2 is the case where the power distribution system management support system according to claim 1 is requested to support the management and construction of the power distribution equipment at the support point as the support item by the support information generation means. In addition, the utilization rate of the power distribution equipment is calculated based on the permissible current of the power distribution equipment and the current value of the support point.

The invention of claim 3 is a distribution system management support method for supporting the management of a distribution system in which a consumer's house and a distributed power source are connected via a distribution line, and is applied to each consumer's house and each distributed power source. The current value on the distribution line side is acquired from a smart meter that is arranged and has a function of measuring the current value on the distribution line side, and based on the acquired current value, at an arbitrary point in the distribution system. Management support information including the current value and the current direction is generated , the system diagram of the distribution system is displayed, and any support point requiring management support on the system diagram of the distribution system and the support point are provided. An input with a support item representing the support content is accepted, an arbitrary section or an arbitrary bank on the system diagram is input as the support point, and power generation to the arbitrary section or the arbitrary bank is input as the support item. When it is requested to determine whether or not the machine can be connected, and the arbitrary section or the arbitrary bank has a forward current based on the current value of the arbitrary section or the arbitrary bank and the current direction. Determines that the generator can be connected, determines that the generator cannot be connected when the arbitrary section or the arbitrary bank has a reverse current, and the above on the system diagram. It is characterized by displaying the judgment result.

According to the inventions of claim 1 and claim 3 , current values on the distribution line side are acquired from a large number of smart meters arranged in each consumer's house and each distributed power source, and based on the acquired current values. , Since it generates management support information including the current value at any point of the distribution system and the current direction, it is possible to grasp the state of the distribution system only with the data acquired by the switch with measurement function as in the past. In comparison, it is possible to grasp the state of the entire distribution system in detail and with high accuracy. Therefore, if the distribution system is managed based on such management support information, the state of the distribution system can always be properly maintained and operated.

According to the first and third aspects of the invention, support is provided when an arbitrary support point that requires management support in the distribution system and a support item indicating the support content for the support point are input from the input means. Since management support information for support items to points is generated, management support information corresponding to specific support items can be obtained for any support that requires management support from a wide range of distribution systems. Is possible. Therefore, if any support point of the distribution system is managed based on such management support information, the state of the distribution system can always be properly maintained and operated.

According to the invention of claim 2 , when support for management and construction of the distribution equipment at the support point is requested as a support item, power distribution is performed based on the allowable current of the distribution equipment and the current value of the support point. Since the utilization rate of the equipment is calculated, whether the allowable current of the distribution equipment has a margin with respect to the current current value, and if there is no margin, how much equipment change is necessary, etc. It can be used as a material for studying management and equipment construction.

According to the first and third aspects of the invention, an arbitrary section or an arbitrary bank is input as a support point, and a determination as to whether or not a generator can be connected to an arbitrary section or an arbitrary bank is required as a support item. In this case, whether or not the generator can be connected is determined based on the current value of any section or any bank and the current direction. Can also be used.

It is a schematic block diagram which shows the schematic structure of the distribution system management support system which concerns on embodiment of this invention, and an example of a distribution system. It is a figure which shows the display screen of the overall management support information generated by the distribution system management support system of FIG. It is a figure which shows the display screen of the equipment examination support information generated by the distribution system management support system of FIG. It is a figure which shows the display screen of the relief support information generated by the distribution system management support system of FIG. It is a timing chart which shows the operation of the distribution system management support system of FIG.

Hereinafter, the present invention will be described based on the illustrated embodiment.

1 to 5 show an embodiment of the present invention, and FIG. 1 is a schematic configuration diagram showing a distribution system management support system 2 that supports the management of the distribution system 1. This distribution system management support system 2 grasps the state of the distribution system 1 in which a plurality of consumer homes are connected and a plurality of distributed power sources are connected, manages and constructs the distribution equipment, and connects a generator vehicle (generator). It is a system for supporting various managements for the distribution system 1, such as judgment of whether or not it is possible.

The distribution system 1 includes a high-voltage line 12 for transmitting high-voltage power output from the feeder of the substation 11, a transformer 13 for transforming the high-voltage power into low-voltage power, and a low-voltage line 14 for transmitting low-voltage power. Although not shown in order to prevent the drawings from becoming complicated, a plurality of high-voltage lines are connected to the substation 11, and a plurality of low-voltage lines are connected to each high-voltage line.

A high-voltage consumer's house 15 that receives high-voltage power is connected to the high-voltage line 12 via a high-voltage service line 121. Further, the high-voltage line 12 is connected to the solar power plant 16 and the wind power plant 17 via another high-voltage service line 121. The solar power plant 16 is a decentralized power source that generates power by using a solar power generation facility such as a solar cell. Further, the wind power plant 17 is a decentralized power source that generates power by using a wind power generation facility such as a wind turbine. The electric power generated by the solar power plant 16 and the wind power plant 17 is sold to the electric power company via the high-voltage line 12.

The low-voltage line 14 is connected to the low-voltage consumer homes 18 and 19 that receive low-voltage power supply via the low-voltage leader line 141. Further, a photovoltaic power generation facility (PV) 192 is installed in the low-voltage consumer's house 19. The electric power generated by the photovoltaic power generation facility 192 is used in the low-voltage consumer's house 19, and the surplus electric power is sold to the electric power company via the low-voltage line 14.

A load (electrical device) 151 and a smart meter (SM) 3A are arranged in the high-voltage consumer house 15. This smart meter 3A is a power meter with a communication function for measuring the amount of power used in the high-voltage consumer's house 15, and has a function of measuring and storing the current value on the high-voltage service line (distribution line) 121 side. That is, the current value on the high-voltage drop line 121 side is measured at regular time intervals (for example, several seconds), and the measurement result is stored in the memory. In addition, it is equipped with a power failure compensation function (battery) so that current value measurement and communication can be performed even during a power failure of the distribution system 1.

Smart meters 3B and 3C are arranged in the solar power plant 16 and the wind power plant 17. The smart meters 3B and 3C are bidirectional power meters with a communication function that measure the amount of power used in the power plant and the amount of power generated by the power generation facility, and have the function of measuring and storing the current value on the high-voltage drop line 121 side. Has.

A load 181 and a smart meter 3D are arranged in the low-voltage consumer house 18. This smart meter 3D is a power meter with a communication function for measuring the amount of power used in the low voltage consumer's house 18, and has a function of measuring and storing the current value on the low voltage service line (distribution line) 141 side.

A load (electrical device) 191, a photovoltaic power generation facility 192, and a smart meter 3E are arranged in the low-voltage consumer house 19. This smart meter 3E is a two-way type power meter with a communication function that measures the amount of power used in the low-voltage consumer's house 19 and the amount of power generation. The smart meter 3E has a function of measuring and storing the current value on the low voltage drop line 141 side. Since the function of measuring the current value on the distribution line side of the smart meters 3B, 3C, 3D and 3E is the same as that of the smart meter 3A, detailed description thereof will be omitted.

The distribution system management support system 2 includes the above-mentioned smart meters 3A, 3B, 3C, 3D and 3E, and the meter management device 4. The smart meters 3A, 3B, 3C, 3D and 3E and the meter management device 4 are freely connected to each other via a communication network NW.

When the smart meters 3A, 3B, 3C, 3D and 3E receive the current value transmission command from the meter management device 4, they transmit the current value on the distribution line side to the meter management device 4 together with the smart meter identification information (meter ID). .. That is, when the current value transmission command is received from the meter management device 4, the latest / latest current value on the distribution line side is acquired from the memory and transmitted to the meter management device 4.

The meter management device 4 is a smart meter operation management system generally called MDMS (Meter Data Management System), and receives power consumption and power generation amount transmitted from smart meters 3A, 3B, 3C, 3D and 3D. It has a database (not shown) for management. In this embodiment, the meter management device 4 is provided with a function of generating management support information for supporting the management of the distribution system 1.

The meter management device 4 mainly includes an input unit (input means) 41, a display unit 42, a system database 43, a support information generation unit (support information generation means) 44, and a central processing unit 45 that controls these. , Equipped with.

The input unit 41 is an interface (mouse, keyboard, etc.) for inputting various information, commands, and the like, and the display unit 42 is a display for displaying various information, images, and the like. When the meter management device 4 generates management support information for supporting the management of the distribution system 1, the input unit 41 refers to any support point that requires management support in the distribution system 1 and to this support point. It is used to enter support items (contents that require support). The display unit 42 functions as an output means for displaying (outputting) the generated management support information as well as an input screen for inputting support points and support items.

The system database 43 is a database that stores a distribution system diagram, and includes distribution equipment of the distribution system 1, for example, high voltage line 12, high voltage drop line 121, transformer 13, low voltage line 14, low voltage drop line 141, switch, utility pole, and the like. It also stores the type, placement position, allowable current, etc. Further, the identification information of the smart meters 3A, 3B, 3C, 3D and 3E arranged in the distribution system 1 is stored in association with the arrangement position.

The support information generation unit 44 acquires the current value on the distribution line side from the smart meters 3A, 3B, 3C, 3D and 3E when the input unit 41 instructs to generate the management support information of the distribution system 1. A task program that generates management support information.

That is, the support information generation unit 44 is activated when a support request for management of the distribution system 1 is input from the input unit 41, and first, the smart meters 3A, 3B, 3C arranged in the distribution system 1 The 3D and 3E identification information is acquired from the system database 43. Next, a current value transmission command is transmitted to these smart meters 3A, 3B, 3C, 3D and 3E. In response to this, the current values on the distribution line side are transmitted from each smart meter 3A, 3B, 3C, 3D and 3E, so that the current value on the distribution line side necessary for generating management support information is acquired. Then, based on the current value on the distribution line side acquired in response to the current value transmission command, management support information including the current value at an arbitrary point in the distribution system and the current direction is generated. The arbitrary point is, for example, an installation position of various distribution facilities such as a high-voltage line 12, a transformer 13, a low-voltage line 14, a high-voltage drop line 121, a low-voltage drop line 141, and a utility pole.

The support information generation unit 44 selectively generates overall management support information, equipment examination support information, and relief support information as management support information. The overall management support information is information for comprehensively managing and supporting the power usage status of each consumer's house in the entire distribution system 1 and the interconnection status of each distributed power source. In addition, in the equipment examination support information, any support point that requires management support in the distribution system 1 and support items for this support point are input, and as support items, management / construction of the distribution equipment at the support point is performed. Generated when assistance is requested. Relief support information is generated when an arbitrary section or an arbitrary bank of the distribution system 1 is input as a support point, and a judgment as to whether or not a generator can be connected to an arbitrary section or an arbitrary bank is requested as a support item. Will be done.

FIG. 2 shows an example of the overall management support information Msi1 generated by the support information generation unit 44 and displayed on the display unit 42. This overall management support information Msi1 is, for example, a point in the system diagram of the distribution system 1 where various distribution facilities such as a high voltage line 12, a transformer 13, a low voltage line 14, a high voltage drop line 121, a low voltage drop line 141, and a utility pole are installed. The circular indexes S1 to S23 are displayed on the sill.

For example, in this distribution system 1, three transformers 13 are connected to the high-voltage line 12, and banks B1, B2, and B3 are connected via each transformer 13. A plurality of low-voltage consumer homes 18 and 19 are connected to the bank B1 via a low-voltage drop line 141. The low-voltage consumer house 19 in which the photovoltaic power generation facility 192 is installed is described as "PV". Further, in the banks B2 and B3, similarly to the bank B1, a plurality of low-voltage consumer homes 18 and 19 are connected via the low-voltage drop line 141, but the illustration is omitted in order to prevent complication.

A high-voltage consumer's house 15 is connected to the high-voltage line 12 on the terminal side (direction away from the substation 11) of the bank B3 via the high-voltage drop line 121. Further, two solar power plants 16 and a wind power plant 17 are connected to the high-voltage line 12 on the terminal side of the high-voltage consumer's house 15 via a high-voltage service line 121. In each section between the indicators S1 to S23, many banks, consumer homes, decentralized power supplies, etc. are connected in addition to those shown in the figure, but in order to prevent complexity in the management support information. , Display is omitted as appropriate.

When the support information generation unit 44 is instructed to generate the overall management support information Msi1, the system database 43 uses the identification information of the smart meters 3A, 3B, 3C, 3D and 3E arranged in the distribution system 1. Get from. Next, a current value transmission command is transmitted to these smart meters 3A, 3B, 3C, 3D and 3E. In response to this, the current values on the distribution line side are transmitted from each smart meter 3A, 3B, 3C, 3D and 3E, so that the current value on the distribution line side necessary for generating management support information is acquired.

Next, the support information generation unit 44 determines the current value at each point of each index S1 to S23 of the distribution system 1 based on the current value on the distribution line side acquired from each smart meter 3A, 3B, 3C, 3D and 3E. And the current direction are calculated. Then, the support information generation unit 44 displays a numerical value representing the current value (ampere) and an arrow line indicating the current direction in the vicinity of each index S1 to S23 of the overall management support information Msi1.

According to such overall management support information Msi1, the amount of power generated by the two solar power plants 16 and the wind power plant 17 is larger than the amount of power used, and the low-voltage service lines 141 are 100 [A] and 100 [, respectively. When reverse power flow of A] and 150 [A] is generated, the reverse of 350 [A] to the high-voltage line 12 at the point of index S5 on the substation 11 side (upstream side) of the solar power plant 16. It can be seen that power flow is occurring.

Further, when a forward power flow of 100 [A] is generated from the high-voltage line 12 to the high-voltage consumer's house 15 due to the use of electric power of the high-voltage consumer's house 15, at the point of the index S4 on the upstream side of the high-voltage consumer's house 15. It can be seen that the high-voltage line 12 has a reverse power flow of 250 [A] obtained by subtracting the usage amount 100 [A] of the high-voltage consumer house 15 from the reverse power flow of 350 [A].

Further, 50 [A] current flows from the high voltage line 12 to the bank B3 due to the power use of the bank B3, and 40 [A] flows from the banks B1 and B2 to the high voltage line 12 due to the balance between the power use of the banks B1 and B2 and the power generation. When the currents of A] and 60 [A] are reverse power flow, 200 [A], 240 [A], and 300 [A], 240 [A], and 300 [A], respectively, at the points of the indicators S3, S2, and S1 on the upstream side of the banks B1, B2, and B3. It can be seen that the reverse power flow of A] is occurring.

Further, the current value and the current direction at any point of the distribution system 1 can be confirmed even in the bank. That is, in the bank B1, 10 [A], 30 [A], and 20 [A] are displayed on the indexes S18, S20, S22, and S23 of the low-voltage service line 141 from the four low-voltage consumer homes 19 equipped with the photovoltaic power generation facility 192, respectively. ], 20 [A] reverse power flow occurs, and due to the power use of the two low-voltage consumer homes 18, forward power flows of 20 [A] are generated at the indicators S19 and S21 of each low-voltage service line 141, respectively. You can see that there is.

As described above, in the overall management support information Msi1, at an arbitrary point in the entire distribution system 1 (for example, various distribution facilities such as high voltage line 12, transformer 13, low voltage line 14, high voltage drop line 121, low voltage drop line 141, and utility pole). Since the current value and the current direction are displayed, it is possible to accurately grasp the connection state of each consumer's house in the distribution system 1 and the interconnection state of each decentralized power supply.

FIG. 3 shows an example of the equipment study support information Msi2 generated by the support information generation unit 44 and displayed on the display unit 42. The same distribution system diagram as the overall management support information Msi1 is used for the equipment examination support information Msi2. When an arbitrary index is input as a support point from the input unit 41 and support for management and construction of the distribution equipment at the position of the selected index is input as a support item, the support information generation unit 44 examines the equipment. Start generating support information Msi2.

The support information generation unit 44 acquires the current value on the distribution line side from the smart meters 3A, 3B, 3C and 3D arranged in the distribution system 1 in the same manner as in the case of generating the overall management support information Msi1. Then, based on the current values on the distribution line side acquired from the smart meters 3A, 3B, 3C and 3D, the current value flowing through the distribution equipment input as the support point and the current direction are calculated.

Next, the support information generation unit 44 acquires the allowable current of the distribution equipment input as the support point from the system database 43. Then, the utilization rate of the distribution equipment is calculated based on the acquired allowable current and the calculated current value at an arbitrary point, and the calculated current value and the current direction are displayed on the equipment examination support information Msi2 of the display unit 42. do.

For example, when the transformer 13 (index S14) of the bank B1 is input as the support point and the management and construction of the transformer 13 are input as the support items, the support information generation unit 44 causes the current flowing through the transformer 13. The value and the current direction are calculated, and the utilization rate of the transformer 13 is calculated. For example, when a reverse power flow of 40 [A] is generated in the transformer 13 and the allowable current of the transformer 13 is 80 [A], the utilization rate is obtained from "current value / allowable current * 100". It will be 50%. The support information generation unit 44 displays the current value and the current direction in the vicinity of the transformer 13 in the equipment study support information Msi2, and displays the calculated utilization rate in the comment column 20.

FIG. 4 shows an example of the relief support information Msi3 generated by the support information generation unit 44 and displayed on the display unit 42. The same distribution system diagram as the overall management support information Msi1 is also used for the relief support information Msi3. When an arbitrary section or an arbitrary bank is input from the input unit 41 as a support point and a determination as to whether or not a generator can be connected to an arbitrary section or an arbitrary bank is requested as a support item in the support information generation unit 44. , Starts the generation of relief support information Msi3.

The support information generation unit 44 acquires the current value on the distribution line side from the smart meters 3A, 3B, 3C and 3D arranged in the distribution system 1 in the same manner as in the case of generating the overall management support information Msi1. Then, based on the current values on the distribution line side acquired from the smart meters 3A, 3B, 3C and 3D, the current value flowing in an arbitrary section or an arbitrary bank input as a support point and the current direction are calculated.

Next, the support information generation unit 44 compares the load and the power generation amount of the arbitrary section or any bank based on the current value and the current direction flowing in the arbitrary section or any bank, and the load is the power generation amount. If there are more than, it is judged that the generator car can be connected. On the contrary, when the amount of power generation is larger than the load, it is determined that the generator vehicle cannot be connected. Then, the calculated current value and current direction of an arbitrary section or an arbitrary bank and the determination of whether or not the generator vehicle can be connected are displayed on the relief support information Msi3 of the display unit 42.

For example, as the support point, the indexes S4 and S5 of the high-voltage line 12 are selected from the input unit 41, the section K1 between the indexes S4-S5 is input, and as a support item, whether or not the generator vehicle can be connected to this section K1. When the determination of is input, the support information generation unit 44 calculates the current values of the indexes S4 and S5 and the current direction. Next, the support information generation unit 44 specifies the current direction in the section K1 based on the calculated current values of the indexes S4 and S5 and the current direction. In this example, since the forward power flow of 30 [A] is generated in the index S4 and the reverse power flow of 10 [A] is generated in the index S5, the forward power flow is generated in the section K1 and the section K1 is The load is greater than the amount of power generated. Therefore, the support information generation unit 44 determines that the generator vehicle can be connected to the section K1 and displays that fact in the comment column 21.

For example, when the section K2 between the indexes S6 and S7 is input as a support point, a forward power flow of 20 [A] is generated in the index S6 and a reverse power flow of 60 [A] is generated in the index S7. Therefore, reverse power flow is generated in the section K2, and the amount of power generation in the section K2 is larger than the load. Therefore, the support information generation unit 44 determines that the generator vehicle cannot be connected to the section K2, and displays that fact in the comment column 22.

Further, when, for example, banks B1 to B3 are input as support points, it is determined whether or not the generator vehicle can be connected based on the current direction in the transformer 13 of each bank B1 to B3. For example, in the bank B3, since a forward current is generated, it is determined that the generator vehicle can be connected. On the other hand, since reverse power flow is generated in banks B1 and B2, it is determined that the generator vehicle cannot be connected.

Next, the operation by the distribution system management support system 2 having such a configuration and the distribution system management support method will be described with reference to the timing chart of FIG.

In each smart meter 3A, 3B, 3C and 3D, the current value on the distribution line side is measured and stored in the memory. In such a situation, when the input unit 41 of the meter management device 4 instructs to generate the management support information of the distribution system 1 (step St1), the support information generation unit 44 of the meter management device 4 is activated to manage the meter. A current value transmission command is transmitted from the device 4 to each of the smart meters 3A, 3B, 3C and 3D in the distribution system 1 (step St2).

Next, the latest current value on the distribution line side is transmitted from each smart meter 3A, 3B, 3C and 3D to the meter management device 4 (step St3). The support information generation unit 44 selectively generates the overall management support information Msi1, the equipment examination support information Msi2, and the relief support information Msi3 according to the type of management support information input from the input unit 41 ( Step St4). The generated management support information is displayed on the display unit 42 (step St5) and is used for examining the management of the distribution system 1.

As described above, according to the distribution system management support system 2 and the distribution system management support method, a large number of smart meters arranged in the consumer homes 15, 18, 19 and the distributed power sources 16, 17, 191 are provided. The current value on the drop line (distribution line) side is acquired from 3A, 3B, 3C and 3D, and based on the acquired current value, the current value at any point S1 to S23 of the distribution system 1 and the current direction are included in the management. Since support information is generated, it is necessary to grasp the status of the entire distribution system 1 in detail and accurately, compared to grasping the status of the distribution system 1 only with the data acquired by the switch with measurement function as in the past. Is possible. Therefore, if the distribution system 1 is managed based on such management support information, the state of the distribution system 1 can always be properly maintained and operated.

Further, when an arbitrary support point that requires management support in the distribution system 1 and a support item indicating the support content for the support point are input from the input unit 41, management support information for the support item for the support point is input. It is possible to obtain management support information corresponding to a specific support item for any support that requires management support from the distribution system 1 spread over a wide area. Therefore, if any support point of the distribution system 1 is managed based on such management support information, the state of the distribution system 1 can always be properly maintained and operated.

Furthermore, as a support item, when support for management and construction of the distribution equipment at the support point is requested, the utilization rate of the distribution equipment is calculated based on the allowable current of the distribution equipment and the current value of the support point. Therefore, materials for studying equipment management and equipment construction of distribution equipment, such as whether the allowable current of the distribution equipment has a margin for the current current value, and if there is no margin, how much equipment change is necessary. It is possible to use as.

In a conventional distribution system to which distributed power sources are connected, when selecting the capacity of a transformer, low-voltage line or low-voltage drop line, the contract type of the consumer's house, the contracted capacity, and the reverse power flow of the main breaker and power generation equipment are used. However, since the actual power consumption varies depending on the usage status of the electric equipment of the consumer, there is a case that the selected distribution equipment is overloaded. However, according to the distribution system management support system 2 and the distribution system management support method of the present embodiment, it is possible to obtain appropriate support for the examination of the management and construction of the distribution equipment.

Further, when an arbitrary section or an arbitrary bank is input as a support point and a judgment as to whether or not a generator can be connected to an arbitrary section or an arbitrary bank is requested as a support item, the arbitrary section or any bank is requested. Since it is determined whether or not the generator can be connected based on the current value and the current direction, it can be used for examination when relief is required for each consumer's house in the distribution system due to a power failure.

In the event of a power outage in a distribution system to which conventional distributed power sources are connected, a generator vehicle is connected to provide relief. I can't connect to the bank. Therefore, in the past, the distribution section / bank to which the generator vehicle can be connected was determined by checking the contract data of the consumer and the data related to the amount of power generated by the distributed power source, but it takes time to process it. In some cases, prompt relief activities could not be carried out. However, according to the distribution system management support system 2 and the distribution system management support method of the present embodiment, it is possible to identify the connectable point of the generator vehicle by using the management support information, so that a quick relief activity against a power outage can be performed. Is possible.

Although the embodiment of the present invention has been described above, the specific configuration is not limited to the above-described embodiment, and even if there is a design change or the like within a range that does not deviate from the gist of the present invention. Included in the invention. For example, in the above embodiment, when the meter management device 4 is instructed to generate management support information, the latest current value on the distribution line side is acquired from each smart meter 3A, 3B, 3C and 3D, and the latest value is obtained. The management support information is generated based on the current value of, but the current value is acquired from the past power consumption and power generation amount managed in the database of the meter management device 4, and the acquired past current value is used. Management support information corresponding to a specific date and time in the past may be generated. According to this, it becomes possible to obtain useful support information when considering the management and construction of distribution equipment in consideration of the season and time zone. Further, although the support information generation unit 44 (support information generation means) is provided in the meter management device 4, it may be provided in another computer or the like.

1 Distribution system 11 Substation 12 High-voltage line 121 High-voltage drop line 13 Transformer 14 Low-voltage line 141 Low-voltage drop line 15 High-voltage consumer home 16 Solar power plant 17 Wind power plant 18, 19 Low-voltage consumer home 151, 181 Load 192 Solar power generation equipment 2 Distribution system management support system 3A, 3B, 3C, 3D smart meter 4 Meter management device 41 Input unit (input means)
42 Display unit 43 System database 44 Support information generation unit (support information generation means)
S1 to S23 indicators

Claims (3)

It is a distribution system management support system for supporting the management of a distribution system in which a consumer's house and a distributed power source are connected via distribution lines.
A smart meter that is installed in each consumer's house and each distributed power source and has a function to measure the current value on the distribution line side.
A meter management device that is freely connected to the smart meter and acquires the current value on the distribution line side from the smart meter.
A support information generating means that generates management support information including a current value at an arbitrary point in the distribution system and a current direction based on the current value acquired by the meter management device.
Display means for displaying the system diagram of the distribution system and
It is provided with an arbitrary support point that requires management support on the system diagram of the distribution system, and an input means for inputting a support item indicating the support content for the support point.
In the support information generation means, an arbitrary section or an arbitrary bank on the system diagram is input as the support point, and as the support item, it is determined whether or not the generator can be connected to the arbitrary section or the arbitrary bank. Is requested, and based on the current value of the arbitrary section or the arbitrary bank and the current direction, the connection of the generator if the arbitrary section or the arbitrary bank is reverse power flow. It is determined that the generator cannot be connected when the arbitrary section or the arbitrary bank has a reverse power flow, and the determination result is displayed on the display means.
A distribution system management support system characterized by this. The support information generation means is based on the permissible current of the distribution facility and the current value of the support point when support for management and construction of the distribution facility at the support point is requested as the support item. , Calculate the utilization rate of the distribution equipment,
The distribution system management support system according to claim 1. It is a distribution system management support method for supporting the management of a distribution system in which a consumer's house and a distributed power source are connected via distribution lines.
The current value on the distribution line side is acquired from a smart meter which is arranged in each consumer's house and each distributed power source and has a function of measuring the current value on the distribution line side.
Obtained on the basis of the current value, it generates a management support information including a current value at any point of the distribution system, and a current direction,
Display the system diagram of the distribution system and display it.
We accept input of arbitrary support points that require management support on the system diagram of the distribution system and support items that represent the support content for the support points.
When an arbitrary section or an arbitrary bank on the system diagram is input as the support point, and a determination as to whether or not the generator can be connected to the arbitrary section or the arbitrary bank is requested as the support item. Based on the current value of the arbitrary section or the arbitrary bank and the current direction, it is determined that the generator can be connected when the arbitrary section or the arbitrary bank has a forward power flow. If the arbitrary section or the arbitrary bank has a reverse power flow, it is determined that the generator cannot be connected, and the determination result is displayed on the system diagram.
A distribution system management support method characterized by this.

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