JP2003125539A - Method and system for power consignation management - Google Patents

Abstract

PROBLEM TO BE SOLVED: To implement power consignation management, whereunder the same amount of power is transmitted at the same time. SOLUTION: Under the power consignation management, the amount of electricity generated transmitted from a power-generating facility 2 to a load facility 3 via a transmission network 1 and the burden of the load facility are monitored by a computer 11. Based on the performance data of the power- generating facility 2, an allowable amount of load change is estimated. Further, based on the change rate of the load facility 3, the amount of load change is estimated. If the estimated amount of load change exceeds the allowable amount of load change, the amount of electricity complementarily generated, required for attaining simultaneous, same-amount conditions for power consignation, is commanded to another power-generating facility 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric retail business using electric power transmission, and more particularly to an electric power transmission management system and method for compensating for the insufficient power generation amount of an electric power transmission contract.

[0002]

2. Description of the Related Art A specific-scale electric utility (so-called electric retailer, hereinafter referred to as PPS (power produ
abbreviated as “cer & supplier)” is used to transmit the electric power generated or procured by itself to the customers related to the electric power company by using the electric power transmission network of a general electric utility (so-called electric power company), or to a third party. It is possible to sell power to customers, which enables effective use of power generation equipment and the like.

The method in which the PPS transmits electric power via the power transmission network of the electric power company in this way is generally referred to as electric power transmission, and a certain amount of shipping fee is paid to the electric power company.

Further, in the case of power transmission, it is premised that the power generation amount of the power generator and the load amount of the customer are the same amount at the same time (hereinafter, abbreviated as simultaneous same amount). For example, 3
It is required to keep the difference between the power generation amount and the load amount for 0 minutes within 3% of the contract power.

[0005]

[Problems to be Solved by the Invention] However, PPS
If the load equipment of the customer relating to the power transmission of the above includes a load with a sharp load change, the power generation performance of the power generation equipment of the power generator may not be able to follow the load change, and if the conditions of the same amount are not met at the same time. There is.

[0006] For example, in the case where the load facility of the customer includes an electric furnace or the like whose load changes sharply, and the power generating facility of the power generator is a coal-fired thermal power plant with low load followability, the same amount of conditions are simultaneously achieved. Can be difficult. If you try to forcefully follow the change in load, there is a risk that the life of a device such as a coal-fired thermal power plant will be impaired.

On the other hand, if the conditions of the same amount are not satisfied at the same time, that is, if the load amount of the customer exceeds the power generation amount of the power generator,
There is the problem of having to pay a surcharge, which is generally considered to be severe.

It is an object of the present invention to construct a power delivery management method and system that satisfies the same amount of power delivery at the same time.

[0009]

In order to solve the above-mentioned problems, a method for managing electric power transmission of the present invention is a computer that calculates the amount of electric power that is transferred from a power generation facility to a load facility via a power transmission network and the load amount of the load facility. And predicting the load change allowable amount based on the performance data of the power generation facility, and predicting the load change amount based on the load change rate of the load facility, the predicted load change amount is the load change allowable amount. When it exceeds the above, it is characterized in that the amount of supplementary power generation required to achieve the same amount condition for power transmission is instructed to another power generation facility.

That is, by monitoring the operating state of the power generation facility such as the amount of power generation, the allowable amount for the load change of the power generation facility in the operating state can be predicted based on the performance data of the power generation facility. In addition, the load change amount can be predicted by monitoring the load amount of the load facility. Therefore, if it is possible to predict that the predicted value of the load change amount will exceed the allowable amount for the load change of the power generation equipment,
By outputting a power generation command to another power generation facility in advance and compensating for the insufficient amount of power generation, it is possible to perform power transmission that satisfies the same amount of conditions determined by the power transmission contract. In this case, it goes without saying that it is preferable to apply a power generation system having a high allowable load change rate, that is, a good load followability, as the other power generation equipment for compensating for the insufficient power.

The power transmission management system of the present invention is
A computer that monitors the power transmission from the power generation facility to the load facility, and a database that stores the power transmission conditions and the performance data of the power generation facility, the computer,
In a preset time unit, while monitoring the amount of power generation of the power generation equipment, while predicting the load change allowable amount in the next time unit based on the performance data, the load amount and load change rate of the load equipment The load amount in the next time unit is monitored and predicted, and when the deviation between the predicted load amount and the power generation amount exceeds the load change allowable amount, the simultaneous same amount condition for power transmission in the next time unit is achieved. It is characterized by comprising means for instructing another power generation facility of the amount of supplementary power generation required for the power generation.

In this case, the computer,
It is preferable that the means for detecting the power generation amount of the power generation equipment, the means for detecting the load amount of the load equipment, and the control means for the other power generation equipment are communicably connected to a communication network. In particular, the communication network may include a communication line using a power line carrier. That is, normally, a power line carrier communication system is adopted in which a signal is superimposed on a power transmission line at the same time as power transmission from a power generation facility to transmit information such as power transmission information. According to this, the power generation amount can be monitored without being involved in the communication line of the PPS power generation facility.

Further, it is preferable that the computer monitors the power generation amount or load amount of the power generation equipment, the load equipment, and the other power generation equipment to monitor the same amount of power transmission conditions at the same time.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is an overall configuration diagram of an electric power system related to electric power transmission to which the electric power transmission management system of the present embodiment is applied, and FIG. 2 is a flowchart showing a procedure of electric power transmission management.

As shown in FIG. 1, a power generation facility 2 of a power generation house A, a load facility 3 of a customer X, and a power generation facility 4 of a power generation house B are connected to a power transmission network 1 of a power company. Electric power flowing in and out of the power generation facility 2, the load facility 3, and the power generation facility 4 is measured by power meters (KWH) 5, 6, and 7, respectively.

The electric retailer (PPS) 9 is a monitoring server 1 composed of a computer for monitoring the same amount of electric power transmission at the same time.
1 and a database 12, the monitoring server 11 is communicatively connected to a communication network 13 such as the Internet.
Further, the communication network 13 includes a communication terminal 14, a communication terminal 15,
A communication terminal 16 is connected, and the amounts of power measured by the power meters 5, 6, and 7 are transmitted to the monitoring server 11 via the communication network 13. The monitoring server 11 is also configured to be able to transmit a power generation command to the power generation facility 4 via the communication network 13 and the communication terminal 16.

Here, in FIG. 1, the PPS 9 purchases electric power from the power generation house A and transmits the power to the customer X in the power transmission network 1.
It is assumed that there is a power sale contract in which power is transferred via. Further, the PPS 9 has a contract to purchase electric power also to the power generation house B, and has a power transmission contract with the electric power company who is the owner of the power transmission network 1. Therefore, the database 12 stores data such as power sale contract conditions, power purchase contract conditions, power transmission contract conditions, power generation facility performance data, and load facility history data of load facilities.

The operation of the power delivery management system thus configured will be described with reference to FIG. The monitoring server 11 retrieves the contents of the power sale contract condition by searching the database 12 (S1), and determines whether the contract period of the power sale contract has started (S2). If the contract period has not started, the process is waited until the contract period starts. When the contract period starts, from the terminal 14 and the terminal 15 to the communication network 1
Data of the amount of power generation and the amount of load are collected via 3 and monitoring is started (S3). Then, based on the power generation amount G (t) of the power generation equipment 2 and the performance data of the power generation equipment 2 in a predetermined time unit (for example, every 30 minutes), the next time unit (t
Predict the allowable load change amount ΔG in +1) (S
4). At the same time, the load amount L (t) and the load change rate ΔL (t) of the load facility 3 are monitored to obtain the predicted load amount L (t + 1) * in the next time unit (S4). The deviation ΔP = (L (t + 1) *-G (t)) between the predicted load amount L (t + 1) * and the current power generation amount G (t) is calculated (S
5). If this deviation ΔP exceeds the load change allowable amount ΔG, there is a possibility that the simultaneous same amount condition for power transmission in the next time unit cannot be achieved. Therefore, ΔP−ΔG is obtained, and it is determined whether or not this difference satisfies the allowable rate ε defined in the power transmission contract (S6). If you are satisfied,
Returning to step S3, the next time unit is monitored. If not satisfied, the amount of power shortage ΔP * that exceeds the allowable ratio ε
And the communication network 1
Power shortage ΔP to the power generation equipment 4 via the communication terminal 3 and the communication terminal 16.
The power generation of * is commanded (S7). Next, it is judged whether or not the contract period has ended, and if not, step S3
Then, the above process is repeated, and if the contract period is over, all the processes are finished (S8).

By performing the power transmission management in this way, as shown by the thick arrow in FIG. 1, in addition to the power A supplied from the power generation equipment A, the supplementary power B is supplied from the power generation equipment B to the load equipment. It As a result, as shown in FIG. 3, within a range that corresponds to the daily load change of the load equipment, the power generation equipments A and B satisfy the conditions of the same amount at the same time as the allowable rate ε defined in the consignment contract. Electric power can be transferred.

Therefore, according to the power transmission management system of the present embodiment, the load facility 3 of the customer X includes an electric furnace whose load changes sharply, and the power generation facility 2 of the power generator A has low load followability. Even in the case of a fired thermal power plant, the same amount of conditions can be achieved at the same time by supplementary power generation by the power generation equipment 4 of the power generation house B. As a result, you don't have to pay the extra fees that you would have to pay if you didn't meet the same amount of conditions at the same time.

[0021]

As described above, according to the present invention, it is possible to satisfy the same amount of power transmission at the same time.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an electric power system related to electric power transmission, to which the electric power transmission management system of the present embodiment is applied.

FIG. 2 is a flowchart showing a procedure for power transmission management.

FIG. 3 is a diagram showing a permissible range of the same amount of power transmission at the same time.

[Explanation of symbols]

1 power grid 2 power generation equipment 3 load equipment 4 power generation equipment 5, 6, 7 wattmeter 9 Electric Retailer (PPS) 11 Monitoring server 12 Database 13 Communication network 14,15,16 Communication terminal

Claims (5)

[Claims] 1. A computer monitors the amount of power generation to be transferred from a power generation facility to a load facility via a power transmission network and the load amount of the load facility, and predicts the allowable load change amount based on the performance data of the power generation facility. At the same time, the load change amount is predicted based on the load change rate of the load facility, and when the predicted load change amount exceeds the load change allowable amount, compensation necessary for achieving the same amount condition for power transmission A power transmission management method characterized by commanding the amount of power generation to another power generation facility. 2. A computer provided with a computer for monitoring the electric power transmission from the power generation equipment to the load equipment, and a database storing the electric power transmission conditions and the performance data of the power generation equipment. The computer has a preset time unit. , While monitoring the power generation amount of the power generation equipment, while predicting the load change allowable amount in the next time unit based on the performance data, while monitoring the load amount and load change rate of the load equipment, the next time unit If the deviation between the predicted load amount and the power generation amount exceeds the load change allowable amount, the supplementary power generation amount required to achieve the simultaneous same amount condition of power transmission in the next time unit. A power transmission management system comprising means for instructing another power generation facility. 3. The computer, the means for detecting the amount of power generation of the power generation equipment, the means for detecting the load amount of the load equipment, and the control means of the other power generation equipment are communicatively connected to a communication network. The power transmission management system according to claim 2, wherein 4. The power delivery management system according to claim 3, wherein the communication network includes a communication line using a power line carrier. 5. The computer monitors the power generation amount or load amount of the power generation equipment, the load equipment, and the other power generation equipment to monitor the same amount of power transmission conditions at the same time. The power transmission management system described in 2.