JP2003199249A - Method of making use of power supply network and system therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control powers supplied to loads of respective users connected to a power supply network according to power rates determined by contracts. <P>SOLUTION: When power is supplied to a regional power supply network 40 comprising a distribution line 4, suppliable power is calculated according to powers supplied by a power generating apparatus 25 and a power storage apparatus 26 and power purchased from a power system 1, and, further, total consumed electric energy in the power supply network 40 is calculated according to electric energies measured by watthour meters 8 by a management server 23. If the total consumed electric energy exceeds the suppliable electric energy and the power supply to the regional power supply network is insufficient, parallel-off commands are given to circuit breakers 10 of the users A and B, who have higher ranks of the parallel-off among the users A-D according to power rates determined in relation to contracts, to parallel off non-important loads 5 belonging to the users A and B from the regional power supply network 40 and the powers are supplied with higher priority to the important loads 6 of the users C and D who have lower ranks of the parallel-off. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of operating a power supply network and a system therefor, and particularly to a consumer who has an important load even when the amount of power supplied to the consumer connected to the power supply network is insufficient. The present invention relates to a method and system for operating a power supply network that is suitable for continuously supplying power.

[0002]

2. Description of the Related Art When electric power is supplied from a power system managed by an electric power company to each customer, when the electric power demand exceeds the supply capacity of a power generation facility and there is a shortage of electric power supply, the generator is overloaded. Load adjustment is performed to prevent step-out. At this time, as a commonly used load adjustment method, there is so-called planned power outage in which the power transmission and distribution system from the power distribution station of the electric power company to each consumer is separated in a system unit to stop power transmission and distribution. In the case of this planned power outage, all customers receiving the power system from that system will be outaged. In order to avoid this planned power failure, for example, Japanese Patent Laid-Open No. 9-200
As described in Japanese Laid-Open Patent Publication No. 963, not for each system but for each customer who is ranked in advance according to the importance of load,
A method has been proposed in which the power supply is disconnected based on the power usage state when the power supply is insufficient. In addition, as a measure to be taken by the business operator that supplies power, there is also a method of increasing the available power itself by adding power generation equipment, but except for the situation where a constant power supply shortage occurs due to an increase in capital investment. Is difficult to do.

[0003] On the other hand, in the case of a customer who is seriously hindered by a power outage, in general, a private power generation facility having a capacity that does not cause a problem even if the power supply from the power company is stopped is provided, or a schedule of the power outage is known. Has adopted self-defense measures such as suspending operations and sales. When installing a private power generation facility, as described in JP-A-8-317565, a load selection device is installed on the customer side,
A method has been proposed in which when the power supply amount that is the sum of the power purchased from the power company and the power generated by the private power generation facility is insufficient, the load is separated from the less important load.

Further, as described in Japanese Patent Laid-Open No. 11-146560, a method is proposed in which when the power consumption of a load in the area exceeds the amount of power generation, the load in the area is disconnected according to the priority order. Has been done. Further, as described in JP-A-11-308771, when the power consumption of all the consumers exceeds the upper limit value, the distribution of the power to the consumers is reduced based on the power receiving contract of each consumer. It has been proposed to stop the power transmission in a time-sharing manner.

[0005]

DISCLOSURE OF THE INVENTION In the prior art,
The power supply company is expanding the power generation equipment in response to the power supply shortage, but this method is difficult to execute except for the permanent power shortage because the amount of capital investment by the business operator increases. . Further, in the conventional technology, when a power supply shortage occurs, it is separated for each customer, the load is disconnected according to the priority order, or the distribution amount to the customer is controlled based on the power receiving contract of each customer. However, these methods have the specific merit of maintaining grid stability on the business side and avoiding power outages for customers ranked as important ranks. However, there is no merit to general consumers, who are positioned as non-important, because power supply is unilaterally stopped, and these methods do not give sufficient consideration to non-important consumers.

Further, when the customer side takes measures, it is necessary to install the private power generation equipment and the load selection / interruption device as in the above-mentioned conventional technique, which increases the economical and human burden.

[0007] An object of the present invention is to provide a contracted power charge for the load of each consumer connected to the power supply network when the amount of power supplied to the consumer connected to the power supply network is insufficient. According to the present invention, there is provided an operating method of a power supply network and a system thereof capable of controlling power supply.

[0008]

In order to solve the above problems, the present invention supplies electric power generated by a power generation facility to loads of a plurality of customers connected to a specific power supply network, The amount of power that can be supplied to the power supply network is calculated based on the generated power of the power generation facility, the total amount of power consumption in the power supply network is calculated, and the calculated total power consumption and the calculated supply availability When the comparison result satisfies the disconnection condition for disconnecting at least some of the consumers, the disconnection order determined by the contract among the plurality of consumers in association with the electricity rate. The load of high-demand customers is sequentially disconnected from the power supply network, and the power-supply network that supplies power preferentially to the load of low-ranking customers defined in the contract in relation to the power rate is operated. The method is adopted.

When adopting the operation method of the power supply network, instead of determining whether or not the disconnection condition for disconnecting some consumers is satisfied, the calculated total power consumption is calculated. It is also possible to determine whether or not the amount of power that can be supplied is exceeded.

When adopting the operating method of each power supply network, the following elements can be added.

(1) With respect to the plurality of customers, the order of disconnection from the power supply network is determined by a contract between a business operator operating the power supply network and the plurality of customers. It charges based on the power rate set in relation to the level of.

The present invention also provides a power generation facility for supplying power by power generation to loads of a plurality of customers connected to a specific power supply network, and the power supply network based on the power generated by the power generation facility. Power supply amount calculation means for calculating the amount of power that can be supplied, total power consumption amount calculation means for calculating the total power consumption amount in the power supply network, and supply by the calculation of the supplyable power amount calculation means Comparing means for comparing the electric energy with the total electric power consumption calculated by the total electric power consumption calculating means, and when the comparison result of the comparing means satisfies the disconnection condition for disconnecting at least some of the consumers. An operation of a power supply network that includes disconnection means for disconnecting from the power supply network in order from the load of the customer with the highest disconnection order defined in relation to the electricity rate among the plurality of consumers The system configuration That.

In constructing the operation system of the power supply network, instead of the disconnecting means, the comparing means as the disconnecting means outputs the comparison result that the total power consumption exceeds the satisfiable power amount. Of the plurality of consumers, it may be configured to have a function of disconnecting from the power supply network in order from the load of the customer having the highest disconnection priority determined by contract in association with the electricity rate.

The following elements can be added when constructing the operation system of each power supply network.

(1) With respect to the plurality of customers, a contract between a business operator operating the power supply network and the plurality of customers sets the order of disconnection order to be released from the power supply network. It comprises a charging means for charging via the network based on the power charge set in association with the high and low.

According to the above-mentioned means, when the power supply amount to the customers connected to the power supply network is insufficient and the disconnection condition for disconnecting some of the customers is satisfied, or when the calculated total When the amount of power consumption exceeds the calculated amount of power that can be supplied, the loads of the higher (earlier) consumers, which are defined in the contract and associated with the electricity charges, are disconnected from the power supply network. By doing so, it is possible to supply power preferentially to the load of a low-order (slow) customer defined in the contract in relation to the electricity rate, and manage the customer and the power supply network. While reducing the economic burden on both parties, it becomes possible to continuously supply electric power to a customer with a high disconnection order defined by the contract, for example, a business operator with a significant load.

Specifically, by defining the order of disconnection in the contract by associating it with the level of the power rate, a customer who is not so damaged even if a power outage supplies power immediately when the power supply becomes insufficient. Instead of being disconnected from the grid distribution line,
It is possible to purchase electricity at a lower electricity rate than that of customers with low off-line rankings. On the other hand, a customer who has a significant load and wants to continue to operate his / her own equipment even in an emergency, and a customer with a low disconnection order installs an emergency power supply for backup in case of an emergency such as a power outage. Since the operation of the important load can be continued without any damage, the damage due to the power outage can be suppressed, and the economical and human burdens such as the installation cost of the emergency power supply facility and the management and maintenance cost become unnecessary. In this case, the electricity charge of a customer with a low order of disconnection is higher than the electricity charge of a customer with a high order of disconnection, but if the power charge is set lower than the recovery amount of various expenses for the emergency power supply,
There are also economic advantages. In addition, the operator who manages the power supply network can supply sufficient power to meet the needs of customers without increasing its own capital investment in the event of an emergency such as a power outage. You can measure improvement.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of a configuration of a regional power supply network when the electrical power supply network according to the present invention is applied to a regional power supply network managed and operated by a specific electric power company. In FIG. 1, the local power network 40 is configured by distribution lines, and the local power supply network 40 is connected to the power system 1 through the interconnection point 3 and is owned by a specific power supplier. The power supply management center 2 and a plurality of consumers A who have signed a power supply contract with a specific power supplier.
B, C and D are connected. All the consumers A to D connected to the local power supply network 40 are premised on concluding the above contract with a specific power supply company, and the specific power supply company provides the power supply service based on the contract. It is to be implemented. Further, the specific power supply company purchases power from the power company that manages the power system 1 connected via the interconnection point 3 based on the power supply agreement.

The supply management center 2 manages / maintains a power generator 25, a power storage device 26 such as a battery, and a power supply network 40.
A management server 23 that performs information processing for operation and a database (storage device) 24 that stores various data are configured.

Here, the power generation device 25 and the power storage device 26
The type, capacity, and number of units are not particularly limited. For example, as the power generation device 25, a device using natural energy such as a relatively small-scale wind power generation device or a solar power generation device, a micro gas turbine, A large-scale power generation device such as a co-generation system using a fuel cell or a turbine generator can be freely combined and configured. In addition, the presence or absence of power generation equipment for each of the customers A to D and the type of load owned are not particularly limited.

Next, a specific configuration of a system for operating the regional power supply network 40 will be described with reference to FIG.
FIG. 2 is a block configuration diagram of an operation system of a power supply network to which the present invention is applied, and the power supply network is shown by a single line connection diagram. In FIG. 2, the distribution line 4 constituting the regional power supply network 40 includes a transformer 12, a circuit breaker 14, and an interconnection point 3.
The power system 1 is connected via the power supply system 1, and the supply management center 2 is connected via the breaker 15 and the transformer 13. In addition, the disconnection device 1 for disconnection is connected to the distribution line 4.
Consumers A, B, C, and D are connected via 0 and the step-down transformer 11. Note that, in FIG. 2, only the customers A to D are shown for simplification, but in reality, a larger number of customers will be connected.

Each of the customers A to C is assumed to be a customer who receives power under a low voltage interconnection condition, and the customer D is assumed to be a customer who receives power under a high voltage interconnection condition. The customer A has only the non-important load 5, and the customer B has the non-important load 5 and the private power generation equipment 7. Examples of the customers A and B include general processes and small offices, and as the private power generation equipment 7 of the customer B, a small-scale solar power generation device or a wind power generation device may be used. Many. Customer C has important load 6 in addition to non-important load 5, but does not own power generation equipment. An example of this customer is a medium-sized office. The customer D has a private load power generation facility 7 together with the important load 6, and examples thereof include a process factory, an intelligent building, a hospital, and the like.

Here, in the present embodiment, the main installation purpose of the private power generation equipment 7 of the customers B and D is to reduce the purchase amount of electric power and to operate the customer's own equipment efficiently by using exhaust heat. It is not installed as an emergency power source. Further, the important load 6 is a load that suffers a great deal of damage due to a power failure or the like, and the non-important load 5 is a kind of load that does not cause much trouble even if a power failure occurs.

An electric power meter 8 for measuring power consumption is provided on the power lead-in line connected from the distribution line 4 to each of the loads A to D, and the measured value of each electric power meter 8 is controlled by communication. It is adapted to be transmitted to the control device 21 of the supply management center 2 via the device 9 and the communication line 31. That is, each watt-hour meter 8 is configured as a power-consumption calculating unit that calculates the power consumption consumed by each of the consumers A to D, and also the total consumption that calculates the total power consumption in the power supply network 40. It constitutes one element of the power amount calculation means.

On the other hand, the supply management center 2 serves as a power generation facility for supplying electric power to each of the customers A to D via the distribution line 4 of the regional power supply network 40, as a wind power generator, a solar power generator, and a turbine. A power generator 25 such as a generator and a power storage device 26 composed of a battery are provided, and
Power generation device 25, power generation monitoring control device 22 for monitoring and controlling the power generation state of power storage device 26, local power supply network 4
Management server 23 that processes 0 operation information, storage device (database) 24 that saves operation information as necessary, control for exchanging information with each of the customers A to D via communication lines 31 and 32. It is configured to include the device 21.

In the management server 23, each customer A to
Power consumption measured by the watt-hour meter 8 installed in D,
The local power supply network 4 is operated by performing calculation processing based on the amount of power purchased from the power system 1 and the outputs of the power generation equipment 25 and the power storage device 26.
The power supply / demand situation within 0 is monitored / predicted, and a disconnection command for disconnecting some consumers from the local power supply network 40 is output based on the monitoring / prediction result.

That is, the management server 23 calculates the amount of power that can be supplied to the local power supply network 40 based on the power generated by the power generation equipment and the power purchased from the power grid 1, and
The total power consumption in the local power supply network 40 is calculated based on the measurement value of each watt-hour meter 8, and the total power consumption and the total power consumption are compared. When the disconnection condition for disconnecting at least a part of the customers is satisfied, the power supply network 40 is connected due to, for example, the stop of the power system 1 or the failure of the power generation device 25 and the power storage device 26. When a shortage of power supply to each customer is generated, the disconnection order created based on the contract previously concluded between the specific power supplier and each customer is referred to The load of a customer having a high (early) disconnection rank determined in association with the power rate is set to the regional power supply network 40.
It is designed to output a disconnection command for disconnecting from.

That is, the management server 23 constitutes a supplyable power amount calculation means, a total power consumption amount calculation means, and a comparison means, and also constitutes a disconnection command output means for outputting a disconnection command according to the comparison result. It will be. This disconnection command is transmitted to the specified interrupting device 10 via the control device 21 and the communication line 32, and the trip operation of the interrupting device 10 causes the unimportant load 5 to be disconnected from the distribution line 4 first. In this case, the management server 23, the control device 21, the communication line 3
2. The blocking device 10 constitutes a disconnecting means.

Here, FIG. 3 shows the concept of the contract form between the electric power company and the specific electric power supplier and the contract form between the specific electric power supplier and the consumer in the operating method of the present invention. . A specific electric power company contracts with an electric power company, purchases electric power, and pays an electric power charge based on an electric power supply contract. The specific power supply company supplies the power purchased from the power company and the power generated by its own power generation facility to the customers A to D of the local power supply network 40.

On the other hand, each of the customers A to D contracts with a specific power supplier who manages the local power supply network 40 to purchase power, and based on the contents of the contract, a power charge (depending on the basic charge and the power used). Pay the total amount of electricity charge). Each customer A ~
D selects from a power rate plan (a plan linked to the basic rate) that is set according to the presence or absence of an emergency power supply compensation condition, and contracts with a specific power supplier. The contract with emergency compensation in the figure means that even if the power supply amount is insufficient due to a power supply stoppage from the power company or a failure of the power generation equipment owned by a specific power supplier, the prescribed time will continue. The contract without emergency compensation allows the customer to be immediately disconnected from the power supply network when the power supply becomes insufficient. Of course, the charges are set higher than those of the contract with emergency compensation and without compensation.

Next, an example of the relationship between the disconnecting rank of the customer and the contract charge (electricity charge) in the operating method of the present invention is shown in FIG.
Shown in. In this example, the contract type is divided into 5 stages of option 1 to option 5 according to the content of emergency compensation, option 1 has the highest disconnection rank (earliest), option 2 to option 3, option 4, option 5 It is set so that the disconnection order becomes lower (slower) in sequence as it goes to. In addition, the electric power charge (basic charge) in the figure is expressed with the conventional basic charge set when the concept of emergency compensation as in the present invention is not used as 100%. Option 1 is without the above-mentioned emergency compensation, and the customer to whom option 1 is applied is first disconnected when the power supply amount is insufficient. However, the basic charge is set at the lowest price, which makes it possible to purchase electricity at a lower cost than the conventional electricity charge. This option 1
Is selected by many consumers, such as ordinary households, who are not significantly affected by power outages.

On the other hand, the options 2 to 5 are provided with emergency compensation, and are set so that the longer the compensation time is, the higher the electric power fee is. These options are selected by customers who have a significant load that suffers a great deal of damage due to the interruption of power supply, such as process factories and offices, and an emergency power supply for backup in case of an emergency such as a power outage. Since the operation of the important load 6 can be continued without installing the power supply, the damage due to the power outage can be suppressed, and the economical and human burden such as the installation cost of the emergency power supply facility, the management and maintenance cost, etc. are unnecessary. The electricity charge paid by the consumer in this case is higher than the conventional electricity charge that does not use the concept of emergency compensation as in the present invention, but is higher than the amount of recovery of various expenses required for installation and maintenance of an emergency power source. Setting a low value also brings economic benefits.

Next, the contents of processing in the supply management center 2 in the operation method of the power supply network according to the present invention will be described with reference to FIG.

First, in step S1, the predicted value Σ of the power consumption of all the consumers A to D connected to the local power supply network 40.
Calculate W (t). In the power consumption prediction process, the measured values measured by the watt-hour meter 8 are sequentially captured via the communication control device 9 and the communication line 31 and stored in the storage device 24, and each consumer sequentially stored in the storage device 24. For example, the following is performed on the basis of statistically processing the past actual power consumption data.

That is, some power consumption patterns whose conditions are close to the prediction target day such as seasons, days of the week, and weather are extracted from the data file, and the extracted data are averaged to obtain a basic power consumption pattern W ₀ (t). . The power consumption pattern W ₀ (t) is corrected by the trend of the power consumption of the consumer at the time of prediction, the temperature, and the trend. The final predicted value W (t) of power consumption is given by the following equation (1).

W (t) = W ₀ (t) + F1 (E, dE / dt) + F2 (T, dT / dt) + (1) Here, F1 is a correction term based on the trend of power consumption of each consumer. , E is the power consumption of each consumer, dE / dt is the time variation of the same power consumption, F2 is the correction term according to the trend with the temperature, T is the temperature, and dT / dt is the time variation of the temperature.

The functions F1, F2, ... Are modified so that the difference between the predicted value and the actual value is reduced. If this W (t) is added for all the customers who have contracted with the specific power supply company, the predicted value ΣW (t) of the total power consumption in the local power supply network 40 is obtained.

Next, in step S2, the predicted value P (t) of the available power in the local power supply network 40 is calculated. For example, the predicted value of the available power is stored in the storage device 24.
Based on the amount of power purchased from the power system 1 and the output of the power generation device 25 and the power storage device 26 stored in, the energy remaining amount of the power storage device 26, the fuel remaining amount of the power generation device 25, the amount of solar radiation, the wind conditions, etc. The calculation is performed using the following equation (2) with reference to the data file relating to the power generation characteristics.

Predicted value P (t) = D (t) + S (t) + G0 + G1 (t) + G2 (t) + G3 (t) + (2) where D: amount of power purchased from the power system 1, S: Amount of supply calculated from the amount of energy remaining in the power storage device 26, G0: Basic amount of power generation of the power generation facility based on the current output G1: Correction term G2 for the time trend of the amount of power generation due to the temporal change in the remaining fuel amount : Correction item for the time trend of the power generation amount based on the predicted value of the change in the amount of solar radiation G3: Correction item for the time trend of the power generation amount of the entire power generation facility based on the predicted value of the temporal change in the wind conditions. The function is modified from time to time so that the difference between the predicted value and the actual value becomes smaller.

Next, in step S3, using the predicted value ΣW (t) of total power consumption and the predicted value P (t) of available power in the local power supply network 40, the power shortage ΔP
The time trend of (t) is calculated by the following equation (3).

ΔP (t) = P (t) −ΣW (t) (3) Next, in step S4, it is determined whether or not a power supply shortage has occurred using the value of ΔP (t). ΔP (t)
> 0, that is, the available power P (t) is the power consumption ΣW
If it exceeds (t), the process returns to step S1,
The process is continued from step S1. On the other hand, ΔP (t) <
0, that is, available power P (t) is power consumption ΣW
When it is below (t), the process proceeds to the next step 5.

In step S5, the data file of the customer disconnection pattern in the storage device 24 is referred to, and the customer to be disconnected is selected according to the power shortage ΔP (t). As shown in FIG. 4, the customer disconnection pattern is created in advance based on the contract content, and the customer to be disconnected is selected according to this customer disconnection pattern. That is, the customer belonging to option 1 is first selected. After selecting the customers belonging to option 1, ΣW (t) is calculated again, ΔP (t) is calculated, and the customers are sequentially selected so as to satisfy ΔP (t)> 0. For example, option 1
When the number of customers belonging to option 2 is increased or all the customers belonging to option 1 are selected, the customers belonging to option 2 are selected.

When a customer to be disconnected is selected,
In step S6, the intention of the disconnection and the time of the disconnection are notified to the consumers who are the targets of the disconnection, and the consumers who are candidates to be disconnected next are also notified. Then, a disconnection command is sent to the selected customer's interruption device 10 via the communication line 32, and the process returns to step S1.

Also in the next process, when ΔP (t) <0 in step S4, a customer belonging to option 2 or option 3 or more is selected as a customer to be delineated, and steps S5 to S5 are executed. S7
Process. By continuing such processing, when the power supply amount to each customer is insufficient, the load of the customer with a high disconnection rank is sequentially disconnected from the power supply network 40, so that the disconnection rank can be changed. Power can be preferentially supplied to the load of a low customer.

The processes of steps S1 and S2 can be carried out in parallel, and the above process can be carried out all the time or can be carried out at predetermined time intervals, for example, every 5 minutes. In this case, when an event related to a customer's disconnection or merger occurs, such as power system accident recovery or power generation device 25 failure recovery, an interrupt is immediately issued and processing is performed even during the processing suspension period. You can also do it.

Further, by predicting the future power shortage as in the present invention, it becomes possible to notify the customer to be disconnected in advance, and also to procure fuel and mobile power supply equipment. Since the urgency and priority of recovery measures can be clarified, efficient measures can be taken.

Next, FIG. 6 shows an example of the structure of a data file used in the operation system of the present invention. Supply management center 2
In the storage device 24, a power consumption result data file F3 in which the instantaneous values of the measured power consumption are stored in time series in order to calculate the predicted values of the total power consumption and the available power supply,
A power generation amount actual data file F2 in which outputs of the power generation device 25 and the power storage device 26 are stored in time series, a power generation characteristic data file F4 in which information of output performance of each power generation facility, remaining fuel amount, and energy storage amount is stored. Based on each file of the disconnection order data file F1 which defines the disconnection order of the customer based on the weather forecast data file F which is sequentially acquired from the external database through the communication line and arranged and stored.
5, the wind condition prediction data file F7 and the temperature prediction data file F6.

When performing various calculations according to the data stored in the data file, as shown in the equation (1), the predicted value of the total power consumption appropriately refers to the actual power consumption data and the temperature prediction data. Calculated. The predictable value of the available power is calculated by appropriately referring to the actual data of the power generation amount, the power generation characteristic data of the power generation facility, the weather prediction data, and the wind condition prediction data, as shown in the equation (2).

Next, FIG. 7 shows an example of an output screen of the management server 23 used in the operation system of the present invention. On the display screen of the management server 23, the total power consumption ΣW (t) and the available power P (t) are displayed with the measured value at the current time and the time trend by the prediction calculation, respectively, and the insufficient power ΔP at the current time is displayed. The value of (t) and its time trend are displayed. Further, as the information of each customer, the customer name, connection state, disconnection rank, power consumption at the current time, scheduled disconnection time, etc. are displayed in a table format, for example, and the selected disconnection candidates are displayed. The customer name of the customer or the customer name of the merge candidate is displayed. Furthermore,
Disconnection of customers, disconnection switch for manually performing merge,
The merge switch is displayed. Note that the decoupling operation can be automatically performed in a sequence based on the time trend of the predicted value of the power shortage and the decoupling pattern of the customer.

[0050]

As described above, according to the present invention,
When the power supply to the customers connected to the power supply network is insufficient and the disconnection conditions for disconnecting some of the customers are satisfied, or the calculated total power consumption can be calculated and can be supplied. If the load exceeds, the load of the higher-ranking customer among the multiple customers, which has been set in the contract in relation to the power rate, is disconnected from the power supply network in sequence, so the contract is set in association with the power rate. It becomes possible to preferentially supply electric power to the load of a customer having a low disconnection rank.

[Brief description of drawings]

FIG. 1 is a configuration diagram for explaining a basic configuration of a regional power supply network according to the present invention.

FIG. 2 is a block diagram showing an operation system of a power supply network according to the present invention.

FIG. 3 is a diagram for explaining the concept of a contract form according to the present invention.

FIG. 4 is a diagram for explaining a relationship between a customer's disconnection rank and an electric power charge according to the present invention.

FIG. 5 is a flowchart for explaining processing contents in the supply management center in the operation method of the power supply network according to the present invention.

FIG. 6 is an explanatory diagram of a configuration of a data file used in the management server according to the present invention.

FIG. 7 is a diagram showing a display example of a display screen of a management server according to the present invention.

[Explanation of symbols]

1 power system 2 Supply management center 2 controller 22 Power generation monitoring control device 23 Management server 24 storage 25 generator 26 Power storage device 31, 32 communication line 4 distribution lines 40 local power supply network 5 Non-important load 6 important load 7 Private power generation equipment 8 electricity meter 9 Communication control device 10 Disconnection breaker 11, 12, 13 Transformer 14, 15 Breaker

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yasunobu Fujita             1-1-1 Kokubuncho, Hitachi-shi, Ibaraki Stock             Hitachi, Ltd. Electric Systems Division (72) Inventor Naoki Kawamura             1-1-1 Kokubuncho, Hitachi-shi, Ibaraki Stock             Hitachi, Ltd. Electric Systems Division F term (reference) 5G066 HA17 HA23 HB02 KA01 KA11                       KD01

Claims (6)

[Claims] 1. The electric power generated by the power generation facility can be supplied to the loads of a plurality of consumers connected to a specific power supply network, and the power can be supplied to the power supply network based on the generated power of the power generation facility. The total amount of power consumption in the power supply network, and compares the calculated total power consumption and the calculated available power amount, the comparison result is at least part of When the disconnection condition for disconnecting the consumers is satisfied, the loads of the consumers having a high disconnection rank defined in the contract in association with the power rate among the plurality of consumers are disconnected in sequence from the power supply network. , A method of operating a power supply network that preferentially supplies power to a load of a customer having a low disconnection order defined in association with a power rate in the contract. 2. The electric power generated by the power generation facility can be supplied to the loads of a plurality of customers connected to a specific power supply network, and the power can be supplied to the power supply network based on the generated power of the power generation facility. The total amount of power consumption in the power supply network, and when the calculated total power consumption exceeds the calculated available power amount, a contract among the plurality of consumers is made. The load of the customer with a high disconnection order defined in association with the power rate is disconnected from the power supply network in sequence, and the load of the customer with a low disconnection order defined in the contract associated with the power rate is given priority. How to operate a power supply network that supplies electricity. 3. The operation method of the power supply network according to claim 1, wherein, for the plurality of customers, a service provider between the operator operating the power supply network and the plurality of customers is used. A method of operating a power supply network, characterized in that a fee is charged based on a power charge set in association with the level of the disconnection order that is disconnected from the power supply network. 4. A power generation facility for supplying power by power generation to loads of a plurality of consumers connected to a specific power supply network, and the power generation system is capable of supplying power to the power supply network based on the generated power of the power generation facility. A supplyable power amount calculating means for calculating the power amount,
Total power consumption amount calculation means for calculating the total power consumption amount in the power supply network, supplyable power amount calculated by the supplyable power amount calculation means, and total power consumption amount calculated by the total power consumption amount calculation means When the comparison result of the comparison means and the comparison result of the comparison means satisfy the disconnection condition for disconnecting at least some of the customers, it is determined in the contract among the plurality of customers in association with the electricity rate. An operation system of a power supply network, comprising: a disconnection means for disconnecting from the power supply network in order from the load of a customer having a high disconnection order. 5. A power generation facility that supplies power by power generation to loads of a plurality of consumers connected to a specific power supply network, and the power generation system is capable of supplying power to the power supply network based on the generated power of the power generation facility. A supplyable power amount calculating means for calculating the power amount,
Total power consumption amount calculation means for calculating the total power consumption amount in the power supply network, supplyable power amount calculated by the supplyable power amount calculation means, and total power consumption amount calculated by the total power consumption amount calculation means And a comparison means for comparing with the above, and when the comparison means outputs the comparison result that the total power consumption exceeds the satisfiable power consumption, it is determined in a contract among the plurality of consumers in association with the power charge. And a disconnecting means for disconnecting from the power supply network in order from the load of a customer having a high disconnection order. 6. The power supply network operation system according to claim 4, wherein a contract between a business operator operating the power supply network and the plurality of customers is provided to the plurality of customers. In addition, the operating system of the power supply network is characterized by comprising a charging means for charging through the network based on the power charge set in association with the level of the disconnection order that is disconnected from the power supply network. .