JP2003032900A - Power consignment control system and power transaction method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a conventional system such as that for a power company, the burden of possession, maintenance, and management of a facility for maintenance of reliability on supply becomes large by the amount of increase of market participants, as a result, the company is compelled to raise the unit price of consignment inevitably as compared with a previous power transaction regulated period. SOLUTION: This system is equipped with a means which stores the node position information of each power generating facility; a means which inputs the output information of each power generating facility stated above; a means which inputs the power consumption information of the load of a power consumer; a means which inputs the power stability information of the connected nodes of each power generating facility stated above; a means which computes the total value to output of the above power stability information using the power consumption information of the above power consumer, and gets the value to output separately for each power generating facility stated above, based on the above power stability information; and a means which outputs a control command to each power generating facility stated above, based on the value to output of each power generating facility stated above obtained by that means.

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission control system and a power transaction method for selling and purchasing electricity from a person who wants to sell electricity and a person who wants to purchase electricity via a computer network.

2. Description of the Related Art In order to reduce the electricity charges toward the global level, Japan has also started partial liberalization of electricity trading for large-scale customers of 20,000 volts or more in March 2000. Along with this, so-called electric power retailers (PPS), which supply electricity to specific-scale electric power companies, that is, large-scale customers, have come to trade in competitive power markets. In this competitive electricity market,
Market participants for the purpose of contributing to the management of businesses (p.
In view of the importance of power quality, these market participants should naturally be required to consider maintaining supply reliability in order to operate a sound power system. However, the power generation facilities of electric power retailers are actually not used for control for maintaining supply reliability (ancillary) due to various reasons described later.

[Problems to be solved by the invention] For the electric power company, as the number of market participants increases, the burden of owning and maintaining the equipment for maintaining the reliability of supply increases, and as a result, the conventional electric power trading Compared to the era of regulation, the problem of inevitably increasing the consignment unit price has arisen. There is an idea that the electric power company directly controls the power generation equipment of the electric power retailer in order to suppress the increase in the unit price of the consignment, but in this case, the originality of the electric power retailer is lost and the activity of the market is lost. It can no longer be expected. On the other hand, electric power retailers are obliged to control power generation facilities so that the power consumption of customers' electricity consumers and the amount of power generation within a predetermined time period match. Further, there is a problem that it is not easy to control for maintaining the supply reliability. (Object of the Invention) In view of the above circumstances, an object of the present invention is to realize real-time trading of electric power, and to supply reliability by using those power generation facilities without impairing the originality of electric power trading of electric power retailers and the like. An object of the present invention is to provide an electric power transmission control system and an electric power transaction method that enable control for maintaining the degree.

In order to solve the above-mentioned problems, the invention according to claim 1 supplies power to a load of an electric power consumer, and therefore, for a plurality of power generation facilities connected to different nodes respectively. In a power transmission control system that outputs a control command, a unit that stores node position information of each power generation facility, a unit that inputs output information of each power generation facility, and power consumption information of a load of a power consumer are input. And a means for inputting power stability information of a node connected to each of the power generation facilities, and a power consumption information of the power consumer to calculate a total value to be output from the power generation facility, and the power stability. Means for obtaining a value to be output for each power generation facility based on the degree information, and outputting a control command to each power generation facility based on the value to be output for each power generation facility obtained by the means That and a means. Also,
According to a second aspect of the present invention, in order to supply electric power to a load of an electric power consumer, in a power transmission control system that outputs a control command to the power generation equipment, node position information, operation plan information, and response performance of the power generation equipment. Means for storing information, means for inputting power stability information of a node connected to the power generation equipment, and corresponding power generation based on the stored node position information of the power generation equipment and the input power stability information The output of the power generation facility is controlled so that the output of the facility is controlled toward a stable electric power, and the output of the power generation facility is changed based on the stored response performance information so that the power generation amount for a predetermined time becomes approximately equal to the operation plan. And means. Further, the invention according to claim 3 is for a consumer monitoring control terminal that collects power information of a load of a power consumer and a power generation operator that outputs a control command to a plurality of power generation facilities connected to different nodes. In a power transmission control system having a monitor control terminal and a server device connected to each monitor control terminal via a network, the consumer monitor control terminal is:
The power generation operator monitoring control terminal includes means for collecting power information and transmitting the power information to the server device, and means for storing operation plan information of the power generation facility, and controlling the power generation facility based on the operation plan information. The server device comprises means for outputting a command and means for inputting output information of the power generation equipment and transmitting it to the server device, wherein the server device is the operation plan information of each power generation equipment and the node position to which the power generation equipment is connected. Means for storing information, means for receiving power information from the consumer monitoring control terminal, means for receiving output information of power generation equipment sent from the power generation operator monitoring control terminal, and the power generation equipment Means for inputting the power stability information of the connected node, the received output information of the power generation equipment and the power information from the customer monitoring control terminal, and the input power stability information and the previous information. Means for changing the operation plan for each power generation facility based on the stored node position information, and means for transmitting the operation plan change command to the supervisory control terminal for the power generation operator whose operation plan should be changed The power generation company monitoring control terminal receives an operation plan change command sent from the server device, and changes the operation plan information stored in the terminal. . Further, the invention according to claim 4 is a power transmission control system having a supervisory control terminal for a power generation company, which outputs a control command to a power generation facility, and a server device connected to each of the supervisory control terminals via a network. In the power generation company monitoring control terminal, means for storing operation plan information and response performance information of the power generation equipment, means for outputting a control command to the power generation equipment based on the operation plan information, and the server device A means for receiving more power stability information, and controlling the output of the power generation equipment in the direction of power stability based on the received power stability information, and a predetermined time period based on the stored response performance information. And a means for controlling so as to change the output of the power generation equipment so that the power generation amount becomes approximately equal to the operation plan. The invention of claim 5 is the same as claim 3
Alternatively, in the power transmission control system according to 4, the server device is provided with a means for storing nodal cost coefficient information representing a relationship between a power transmission line access cost of each node and a power generation facility output, and the power transmission line access is used as the power stability information. Cost information is input, the power generation output of the corresponding power generation facility is calculated using this transmission line access cost information and the stored nodal cost coefficient information, and a control command is output to the power generation facility based on this calculation result. It is characterized by Further, the invention according to claim 6 is the invention according to claim 3 or 4.
In the power transmission control system described, a means for storing nodal cost coefficient information representing the relationship between the transmission line access cost of each node and the power generation equipment output in the server device, and power generation output change request information as the power stability information. Based on the input, the power generation output of the corresponding power generation facility is calculated based on the information, and a control command is output to the power generation facility based on the calculation result, and the nodal cost coefficient information. A means for calculating an access cost and outputting the calculation result, the power transmission control system. Further, the invention according to claim 7 is an electric power transaction method for adjusting demand information relating to power sale and power purchase from a power sale applicant and a power purchase candidate through a computer network.
A step of receiving power sale request information including information on a power sale period and a power sale price, and a step of receiving power purchase request information including information on a power purchase amount, a power purchase period, and a power purchase price from a power purchase candidate, Under a predetermined condition, a first adjustment step of determining a combination of an electric power sales applicant and an electric power purchase applicant and notifying the general electric power supplier, and the first adjustment step for the electric power sales applicant or the electric power purchase applicant. Based on the power supply request information, a step of notifying power sale permission information or power purchase permission information based on the combination obtained in the adjustment step, a step of receiving power supply request information for each node from a general electric power supplier, The second adjustment stage for re-adjusting the combination of the electricity sales applicant and the electricity purchase applicant, and if the power supply request of the general electric utility is satisfied in this second adjustment stage, based on the combination by this stage, Electric Notifying the sales applicant or the power purchase applicant of the power sale change information or the power purchase change information and the electric power supply availability information to the general electric power company, while the electric power supply request of the general electric power company is issued. If not, the step of notifying the general electric power company of the information on the non-supply of electric power is included. Further, claim 8
The described invention is an electric power transaction method for adjusting demand information regarding power sale and power purchase from a power sale applicant and a power purchase applicant through a computer network, and the power sale amount, power sale period, and power sale price from the power sale applicant. Power purchase request information including information about the power purchase amount, power purchase period, and power purchase price from a person who wants to purchase power, and the power sale under predetermined conditions. A first adjusting step of deciding a combination of a desirer and a purchaser of electric power and notifying the general electric power supplier, a step of receiving power supply request information for each node from the general electric power supplier, and the power supply request information A second adjustment step for re-adjusting the combination of the power sale applicant and the power purchase applicant based on the above, and the sale of power by the power sale applicant by the combination obtained in the first adjustment step. If there is a difference between the capacity and the amount of electricity that can be sold by the person who wants to sell electricity by the combination obtained in the second adjustment step, the step of calculating the price based on the difference and the general electric utility The step of presenting the calculated price information and the available power supply amount information, the step of inputting decision information from the general electric power supplier, and the combination of the power sales applicant and the power purchase applicant again based on the decision information. If there is no reception of power supply information from the third electric adjustment company and the first adjustment step, or if there is reception of electric power supply information from the general electric utility, Based on the combination in the third adjusting step, a step of notifying the power sale applicant or the power purchase applicant of the power sale permission information or the power purchase permission information. A. Furthermore,
The invention according to claim 9 is the power trading method according to claim 7 or 8, wherein the predetermined condition is that the power sales applicant or the power purchase applicant is a power transmission and distribution system of a plurality of general electric utilities. When connected, the power trading method is characterized by adjusting the combination of the power sales applicant and the power purchase applicant so that the total amount of trading transactions by the same general business operator is maximized. Furthermore, the invention according to claim 10 is the power transaction method according to claim 7 or 8, characterized in that the power supply request information from a general electric utility is received as a transmission line access cost. Is the way.

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1
FIG. 1 is a diagram showing an overall configuration of a system of the present invention. In FIG, G1, G2 is a power plant of a relatively large volume of the same or different electric utility (power company EPCO), between these power plants G1, G2, a plurality of nodes _N 1, N ₂ ... N ₈ and branches B ₁ , B ₂ ,
Tide ... is interposed the power system consisting of B _5, each by the customer of the status of power consumption, or in the reverse direction as flow tide toward the power plant G2 from the power generating facility G1 connected to the node Although the power generation equipment control device (not shown) must be controlled so that the power flows, the power transfer control and the power trading method when controlling the power flow P _F flowing to the branch B ₃ are the gist of the present invention. Will be described later. In the present invention, a node is a connection position between a power transmission facility and a power facility such as a power generation facility or a load, and a bus line, for example, corresponds to this. A branch is a transmission / distribution line that links the nodes. In this example, the branch B ₆ as well as connected to the node N ₃ and N ₆ relatively close to a plurality of nodes of which the power generation facility G1 and G2, the general consumer L5, L6 for receiving power from each of the power company, B _{9 is} also connected. The power generation facility G3 in one branch B _6, are connected respectively to power generation equipment G4 to other branch B _9. The power generation facilities G3 and G4 are power stabilizing power sources belonging to the power company EPCO, and are N ₉ , N ₁₀ , and N 4.
₁₅ and N ₁₆ are nodes in the vicinity of the end of each power generation facility. On the other hand, the node N ₄ and N ₅ is located between the node N ₃ and N _6, together with the power retailers connects the power generation equipment G21 and G31 owned, supply of electric energy contracted with the power retailers Large consumer L to receive
22 and L32 are connected. Also, T24 and T3 in the figure
Reference numeral 4 denotes an information terminal installed mainly in the large-scale customers L22 and L32 and used mainly for monitoring purposes.
Is an information terminal installed in the power generation facilities G21 and G31 of the electric power retailer and mainly used for control. These will be described in detail with reference to FIG. A server S of the electric power retailer (PPS) (hereinafter referred to as a PPS server S) is connected to the network NW _1.
The electric power company EPC is connected to the PS server S through a transmission line.
Power generation command Δ from O to the power generation equipment G21, G31
PG ₂₁ and ΔPG ₃₁ are sent. It should be noted that the power generation commands ΔPG ₂₁ and ΔPG ₃₁ are naturally provided with the increasing / decreasing direction and size of the power generation output. When the power flow P _F flowing in the branch B _{3 of} FIG. 1 is controlled in the zero direction, the power generation commands are −ΔPG ₂₁ and ΔPG _{31 as} illustrated. FIG. 3 is a diagram showing in detail the information terminals T23 and T24 and the PPS server S of FIG. 1 in FIG. Each of these information terminals T2
3, T24 is different only in the main application, and has substantially the same hardware configuration. That is, each terminal is internally provided with an input / output unit, a calculation unit, a storage unit and a transmission unit. Here, the consumer information terminal T24
Inputs the amount of electric power consumed by the large-scale electric power consumer, performs a predetermined calculation, and then executes the above-mentioned P via the network NW _1.
It is used for the monitoring purpose of transmitting to the PS server S. On the other hand, the information terminal T23 for the power generator is the power generation facility G.
21 for storing the operation plan information, means for outputting a control command to the power generation equipment G21 based on this operation plan information, and inputting the output information of the power generation equipment G21, performing a predetermined calculation, and then performing a network operation. The PPS via NW ₁
It is used for the purpose of monitoring and controlling the power generation facility G21 of transmitting to the server S. Terminal T33 and power generation equipment G3
The same applies to the relationship between the terminal T34 and the large-scale power consumer L32, and thus the description thereof will be omitted. Regarding the PPS server S, the input / output means, the arithmetic means,
Although it is composed of hardware such as storage means and transmission means, the following means by software is provided so as to receive the stability information from the electric power company and adjust the output between the plurality of power generation equipments G21 and G31. There is. That is, P
The PS server S stores the node position information of each power generation facility, a unit that inputs output information of each power generation facility, a unit that inputs power consumption information of a load of an electric power consumer, and each power generation. A means for inputting power stability information of a node connected to the equipment and a power consumption information of the power consumer are used to calculate a total value to be output from the power generation equipment, and based on the power stability information. Means for obtaining a value to be output for each power generation facility, and means for outputting a control command to each power generation facility based on the value to be output for each power generation facility determined by the means. There is. The "node position information" means information about the position where the power facility is connected to the power transmission and distribution system, and indicates the connection point of the power facility to the power transmission and distribution system between the power transmission company and the general electric utility. Information that can be specified is sufficient. Therefore, it also includes the numbers and symbols given based on the system diagram and the names of commonly used electric power equipment. The "electric power transmission company" is a company that supplies electric power to electric power consumers by using a power transmission and distribution system of a general electric power company (so-called 10 electric power companies), and includes a specific scale electric power company (PPS). Figure 3
Between the PPS servers S ₁ and S ₂ and the power company,
An example in which the network NW and the energy net server ENS are interposed is shown. Here, the energy net is used to mean a system or a service provider that provides information for power interchange among a plurality of PPSs.
When the energy net server ENS is interposed, the electric power company EPCO does not need to issue an electric power generation command to each electric power retailer, but only issues a total electric power generation command. The energy net server ENS outputs a power generation command to each electric power retailer. Therefore, in the example of FIG. 3, P in FIG.
The energy net server ENS bears the function of the PS server S. In the present invention, the PPS server S or the energy net server ENS will be generically referred to as a server device hereinafter. (Second Embodiment) In the present embodiment, electric power for outputting a control command to a power generation facility that supplies electric power to a load of an electric power consumer by adjusting according to an IPP, an electric power delivery company, and time. It relates to a consignment control system. Therefore, the power transmission control system of the present embodiment, means for storing the node position information, operation plan information and response performance information of the power generation equipment, and means for inputting the power stability information of the node connected to the power generation equipment And controlling the output of the corresponding power generation facility based on the stored node position information of the power generation facility and the input power stability information in the stable power direction, and also storing the stored response performance information. And so that the amount of power generation for a given time is approximately equal to the operation plan,
And a means for controlling so as to change the output of the power generation equipment. This was announced with the electric power company shown in Fig. 4.
It explains using the figure showing the output of the generator of the electric power company
Then , it is assumed that the initial operation plan of a certain power generation facility is a constant output of the linear ADG, and the response performance of this power generation facility is θ1 in the output decreasing direction and θ2 in the output increasing direction. A storage device (means) for the electric power transmission control system based on these pieces of information.
Save it to and also notify the electric power company. In addition,
The information regarding the response performance may include a delay time from the output time of the control command to the start of the output change. In the present embodiment, the delay time of the power generation facility is treated as being extremely small. The power transmission support system reduces the output based on the power stability information from the power company, and
In the same amount control interval, the output is restored so as to satisfy the power generation amount of the original operation plan. That is, decrease (area ABCD) and increase (DEF
Adjust the operation so that the areas in G) are equal. on the other hand,
The power generation equipment of the electric power company starts to fall at time C when the power generation equipment of the power generation company starts to increase in output. For example, when the simultaneous equal-quantity control interval is set to 30 minutes, the response performance of the power generation equipment of the electric power company is delayed by about 10 minutes from the response performance of the power generation equipment of the power generation company (1/2 of the simultaneous equal-quantity interval). If there is a delay), the same amount of control can be achieved while using the power generation equipment of the power generation company for power stabilization control. As described above, according to the present embodiment, by using the power generation equipment of the power generation company for the power stabilization control, the control can be started quickly, and the power company dares to possess equipment with good responsiveness for this. It is not necessary to do so, and the labor cost of maintenance can be reduced. (Third Embodiment) In this embodiment, an operation plan is instructed by a terminal and an operation change plan is instructed by a server device. For this reason, the present embodiment is similar to that shown in FIG.
And monitoring control terminals for consumers T ₂₄ and T ₃₄ for collecting electric power information of loads of electric power consumers, and monitoring for power generation operators that output control commands to a plurality of power generation facilities G 1 and G 2 connected to different nodes, respectively. In a power delivery control system having control terminals T ₂₃ , T ₃₃ and a server device S connected to each of the monitoring control terminals via a network NW ₁ , the consumer monitoring control terminal collects power information and collects the power information from the server. The monitoring control terminal for the power generation company, comprising means for transmitting to the device S, means for storing operation plan information of the power generation equipment, and means for outputting a control command to the power generation equipment based on this operation plan information, Means for inputting output information of the power generation equipment and transmitting it to the server device, wherein the server device is connected to the operation plan information of each power generation equipment and the power generation equipment. Means for storing node position information, a means for receiving power information from the consumer monitoring control terminal, a means for receiving output information of power generation equipment sent from the power generation operator monitoring control terminal, Means for inputting power stability information of a node connected to the power generation facility, output information of the received power generation facility and power information from a consumer monitoring control terminal, and the input power stability information and storing the information. A means for changing the operation plan for each power generation facility based on the node position information that is present, and means for transmitting the operation plan change command to the supervisory control terminal for the power generation operator whose operation plan should be changed, In the supervisory control terminal for the power generation company, the operation plan information stored in the terminal can be changed by receiving the operation plan change command sent from the server device. It was. The electric power information collected by the customer monitoring control terminal may be sent to the power generation operator monitoring control terminal, and the output adjustment may be performed by the power generation operator monitoring control terminal. (Fourth Embodiment) In this embodiment, in FIG. 1 performs operation plan at the terminal T _23, T _33, a power wheeling control system to perform the operation plan change instruction from the server device S It has a supervisory control terminal for a power generation company that outputs a control command to a power generation facility, and a server device S that is connected to each of the supervisory control terminals T ₂₃ and T ₃₃ via a network NW1. The power generation operator monitoring control terminals T ₂₃ and T ₃₃ store the operation plan information and response performance information of the power generation facilities G1 and G2, and control commands to the power generation facilities G1 and G2 based on the operation plan information. And a means for receiving power stability information from the server device, and controlling the output of the power generation equipment in the power stable direction based on the received power stability information, and storing the response. And means for controlling the output of the power generation equipment based on the performance information so that the power generation amount for a predetermined time is approximately equal to the operation plan. (Fifth Embodiment) This embodiment is based on FIG. 1 to FIG.
In the power transmission control system, a nodal cost coefficient and transmission line access cost information as power stabilization information are input to the server device. In this embodiment,
Nodal cost coefficient information indicating the relationship between the power transmission line access cost of each node and the power generation equipment output is stored in the server device S by the storage means, and the power transmission line access cost information is input as the power stability information. By using the access cost information and the stored nodal cost coefficient information, the power generation output of the corresponding power generation equipment is calculated by the calculation means, and the control command is output to the power generation equipment based on the calculation result. . The concept of the present embodiment will be described below. While the above-mentioned competitive electricity market is being formed, the models that have been discussed as market models are Pool Model and Bilatera.
It is roughly divided into 1 Model. In the embodiment of the present invention, a Pool M based on a transaction involving a transmission service company (intermediary) between a power generation company EPCO and a consumer
This is a method of reflecting the information provided by the system stabilization control system in the nodal price based on odel. In FIG. 1 described above, the electric power company EPCO that covers most of the electric power demand and owns the power transmission network, the PPS that is also an intermediary that performs the consignment service, and the plurality of power generation companies G2.
1, G31 and large customers L22, L32 are shown. As long as there is no problem in supply reliability in the power transmission network, power trading transactions between power generators and consumers that are determined by the equilibrium condition of the following formula (1) in Pool are carried out via a consignment service provider (PPS). I'm supposed to be.

[Equation 1] Here, P _{Oi is} the active power Active Pow of the power generation company i.
er Output of Generator i C _Oi : Cost function of power generation company i Cost func
ion of Generator i _PLj : Active Power Concept
ion of Customer j C _Lj : Cost function of Cust
mer j λ: the price of electrical
y in the market mediated
by the electricality trail
er The consignment fee is paid from the consignment service provider (PPS) to the electric power company EPCO, but the transmission line access cost determined by the electric power company EPCO is a uniform value regardless of the power transmission point. N-1 security write of the grid, including generators of power companies and generators of generators
The supply reliability of the transient stability surface based on rion is evaluated by the stabilization control system owned by the electric power company. Below, consider the case where a problem of supply reliability is found as a result of the evaluation. In the stabilization control system, the transfer of the desired generator output is proposed to improve the supply reliability as a means of preventive control to maintain the stability in the event of a single system failure or to secure the stability margin. To be done. When the generator of the power generation company is selected for output adjustment, instead of directly controlling the generator of the power generation company by the output command,
The change in transmission line access cost for each power generation point is presented to the market as a price signal. The proposed changes will act on the market to indirectly change via the consignment service provider (PPS) at each nodal cost power generation point in Pool Market, resulting in the reallocation of the desired generator output. Can be expected. However, in the output adjustment (transfer) of this generator, it is not required to change the consumption amount of the customer or the contract power sale fee, on the assumption that the customer is not affected at all. This is because the nodal price ρ _i of the power generation point i at the current power generation output is calculated from the equilibrium point shown in the equation (1) below by the following equation (2).
Thus, and at the new equilibrium point after power generation adjustment, the nodal price is equivalent to no change from normal.

[Equation 2] Where ΔTRC _i : increment of transmission line access cost at power generation point i Next, evaluation of transient stability and GENERATION RE
SHEDULING will be described. In a central processing unit of a transient stability control system which is put into practical use in Japan, screening calculation and detailed stability calculation for each contingency based on n-1 Security Criterion are performed. Here, as the information obtained from the central processing unit, attention is paid to the acceleration energy index obtained by the following formula (3) of the screening calculation.

[Equation 3] Where P _{Oi is} the effective output of the generator i immediately before the occurrence of the failure P _{fi is} the effective output of the generator i at the time of the failure M i is the inertia constant ΔT of the generator _i : the duration of failure of the above equation (3) The first term represents the total acceleration energy of all generators. The second term is the acceleration energy centered on the inertia. Therefore, AE represents the total amount of unbalanced acceleration energy accumulated in each generator during the accident. The threshold value of the AE value is obtained based on the result of the case study by the detailed stability calculation in advance. The stability margin decreases as the AE value increases and approaches the threshold value. Further, when the AE value exceeds the threshold value, it becomes unstable. Therefore, if the AE value can be lowered by changing the output of the generator, the unstable case can be stabilized or the stability margin can be increased. The problem here is how to find out which generator output should be increased and which generator output should be decreased to lower the AE value. Generally, the transient stability shows a non-linear behavior related to the operating state of the generator and the power flow congestion degree of the power transmission network, but in many cases, there is a correlation with the power flow congestion degree of the ultra high voltage trunk transmission line of the power transmission network. Therefore, using the procedure described below, the direction of power generation adjustment for lowering the AE value is determined from the sensitivity calculation by DC calculation for the purpose of mitigating the degree of congestion of the transmission line, and then the required power generation adjustment amount is obtained. Step 1: DC of the sensitivity Si at the power generation point i for mitigating the transmission line congestion degree of the main power transmission route closest to the transmission capacity limit
Calculate by calculation. Step 2: For the purpose of lowering the AE value by increasing / decreasing the generator output according to the sign of the sensitivity Si, the decrease amount (-ΔAE) of the AE with respect to the output increment ΔP _Gi of the output adjustable power generation point i is obtained. At this time, as a supply / demand balance condition, (-ΔP _Gi ) is distributed to the generator j whose sensitivity Sj is different from Si in sign, and then AE is calculated by the following equation (4).

[Equation 4] here, jε {∀ (Si ^* Sj <0)} Step3: Step1 and Step2 are repeated until the amount of decrease in AE (-ΔAE) falls below the AE threshold value or the required stability margin is reached. Step 4: The output adjustment amount ΔP _Gi of each generator at the time when the condition of Step 3 is satisfied is used as the transfer result of the generated output. Next, the nodal price will be described. Power generation point i
The generator cost Ci including the increase ΔTRCi of the power transmission line access cost is expressed by a quadratic function as in the following equation (5).

[Equation 5] Here, if there is no problem in supply reliability, ΔTRCi =
0, and ΔTRCi ≠ 0 when a measure for supply reliability is required
Will be given. Nodal price ρ at power generation point i
_i is represented by the following equation (6).

[Equation 6] Comparing equations (2) and (5), the following equation (7) is obtained at the equilibrium point when there is no problem in supply reliability.

[Equation 7] When problems with supply reliability occur, ΔTRC can be used as a countermeasure.
Power generation adjustment Δ as a measure of supply reliability by giving i ≠ 0
P _Gi is performed to reach a new equilibrium point. At this time, if you add a condition that does not change the power selling cost of the market,
At the new equilibrium point, the following equation (8) is obtained, and therefore ΔTRCi is obtained from ΔP _Gi by the following equation (9).

[Equation 8] (Sixth Embodiment) This embodiment is a power transmission control system in which a nodal cost coefficient and output change request information of a power generation facility are input as power stabilization information to a server device. This embodiment is shown in FIGS.
Means for storing the nodal cost coefficient information representing the relationship between the power transmission line access cost of each node and the power generation equipment output in the server device S, and the power generation output change request information as the power stability information. Based on the above, the power generation output of the corresponding power generation equipment is calculated, and the transmission line access cost is calculated based on the means for outputting a control command to the power generation equipment based on the calculation result and the nodal cost coefficient information. And means for outputting the calculation result. (Seventh Embodiment); (Claim 7) Correspondence This embodiment is a method for selling power from a power sales applicant represented by a power generation company and a power purchase applicant represented by a customer through a computer network. Also, the present invention relates to a power trading method for adjusting request information regarding power purchase.
In order to achieve this method, in this embodiment, as shown in FIG.
As shown in FIG. 6 and FIG. 6, the step of receiving power sale request information including information on the power sale amount, power sale period, and power sale price from the power sale applicant, and the power purchase amount, power purchase period from the power purchase applicant,
At the stage of receiving power purchase request information including information on the power purchase price, and under certain conditions, determine the combination of power sales applicants and power purchase applicants, and notify general electric power companies represented by electric power companies. A first adjusting step; a step of notifying power sale applicants or power purchase applicants of power sale permission information or power purchase permission information based on the combination obtained in the first adjustment step; Receiving the power supply request information for each node from the node, a second adjusting step of readjusting the combination of the power sales applicant and the power purchase applicant based on the power supply request information, and the second adjustment If the power supply requirements of the general electric utility are satisfied at the stage, the power sale change information or the power purchase change information is notified to the power sale applicant or the power purchase applicant based on the combination at this stage. Both of them shall notify the general electric power company of the power supply availability information, and on the other hand, if the general electric power business operator does not satisfy the power supply request, the general electric power business operator should be notified of the power supply unavailability information. ing. The power supply request information from the general electric utility is received as a transmission line access cost. (Eighth Embodiment) In the present embodiment, request information relating to power sale and purchase from power sale applicants typified by power generation companies and power purchase applicants typified by consumers is transmitted via a computer network. It relates to a power trading method to be adjusted. In order to achieve this method, in the present embodiment, as shown in FIGS. 5 and 6 , the power sale request information including information on the power sale amount, power sale period, and power sale price is received from the power sale applicant. Decide the combination of the power sales applicant and the power purchase applicant based on the steps, the step of receiving the power purchase request information including the information about the power purchase amount, the power purchase period, and the power purchase price from the power purchase applicant, and predetermined conditions. Then, a first adjustment step of notifying the general electric power supplier, a step of receiving power supply request information for each node from the general electric power supplier, and a power sales applicant and power purchase based on the power supply request information. A second adjustment stage for re-adjusting the combination of applicants, a power sale possible amount of the person who wants to sell power by the combination obtained in the first adjusting stage, and a demand for power sale by the combination obtained in the second adjusting stage. Power sales amount If the difference is generated between the calculating a price based on the difference,
Presenting the calculated price information and the available power supply amount information to the general electric power utility, inputting decision information from the general electric power utility, and the electricity sales applicant and the power supplier based on the decision information. Based on the third adjustment step for re-adjusting the combination of purchase applicants, and the combination according to the first adjustment step if no power supply information is received from the general electric utility, or the electric power supply from the general electric utility When the information is received, a step of notifying the power sale applicant or the power purchase applicant of the power sale permission information or the power purchase permission information based on the combination in the third adjusting step is provided. The power supply request information from the general electric utility is received as a transmission line access cost as in the seventh embodiment described above. It also includes PPS itself and general electric utilities, as well as electric power producers and consumers within the PPS. (Ninth Embodiment) In the present embodiment, request information relating to power sale and purchase from power sale applicants typified by power generation companies and power purchase applicants typified by consumers is transmitted via a computer network. It relates to a power trading method to be adjusted. In order to achieve this method, in the present embodiment, when the power sales applicant or the power purchase applicant is connected to a power transmission and distribution system of a plurality of general electric power companies, the same general electric power company It is a power trading method characterized by adjusting a combination of power sales applicants and power purchase applicants so that the total amount of trade transactions is maximized. FIG. 5 and FIG. 6 are flowcharts for explaining the processing process of the power transaction by the power transmission control. In FIG. 5, in step 1, the power generation company submits to the PPS a request for the amount of power sold, the period, and the unit price, and the consumer submits a request for the amount of purchased power, the period, and the unit price to the PPS. It should be noted that the consumers mentioned here include large consumers and general consumers. Next, in step 2, the PPS tentatively determines a combination of a power generation company and a customer to be performed within the PPS.
In step 3, PPS further informs Energy Net of the hopes of the remaining power producers / consumers. In step 4, determine the product (electric power) and its price (risk premium) that will eliminate the mismatch of the power producer / customer's desired mismatch. <For the basic menu idea, contact PPS in advance>. In Step 5, a combination of a power generation company and a customer is provisionally decided <Basically, a cheap power generation company and a high customer are connected. Variations in cost evaluation methods such as transmission line access costs and regional transfer costs are possible. In step 6, Energy Net obtains grid information from the power company and in step 7
Will examine the power flow congestion and stability in system operation. In Step 7, if the energy net cannot adopt the examination of power flow congestion / stability in grid operation (NO), return to Step 5 and if it can adopt the examination of power flow congestion / stability in grid operation (YES) Then, the process proceeds to step 8, the combination amount of power generation company / consumer / period / unit price is determined, and the process proceeds to step 9. In FIG. 6, in step 9, the above is notified to the PPS and the amount is notified to the electric power company. In step 10, the power company determines
Consider stability. In step 10, if the examination result cannot be adopted, the power supply command is issued to the energy net and the process returns to step 8, while if it can be adopted (Y
ES) proceeds to step 11. In step 11, the above-mentioned examination result is reflected in the system operation plan, and the information is notified to Energy Net. In step 12, EnergyNet informs the PPS of the utility's consideration. In step 13, the PPS informs the power producer / customer of the final result. Then, in step 14, the consumer consumes power, and PPS, Energy Net and the power company respectively monitor power consumption. In step 15, P
The PS issues a power generation command to the power generation company to achieve the same amount for 30 minutes at the same time according to the power consumption of the target consumer. In step 16, the power generation company generates power in accordance with the power generation command from the PPS, and the PPS, the energy net and the electric power company respectively monitor the generated electric power. In step 17, the energy net monitors the same amount for 30 minutes at the same time, and outputs a power generation command to the PPS or its own power plant as necessary. Through the series of processing from step 1 to step 17 described above, the effect of cash flow and transaction between the power generation company, the consumer, the PPS, the energy net, and the power company is as shown in FIG . First, let's consider cash flow. The power generation company receives the power sale charge from the PPS by selling the power, the consumer pays the power purchase charge to the PPS, the PPS pays the power sale charge to the power generator, and the power sale charge is received from the consumer. Received and paid the consignment fee to Energy Net (however,
Adjusted for transmission line access costs) and pay a risk premium for Energy Net. Energy Net pays the utility company a consignment fee (although adjusted for transmission line access costs) and receives a risk premium from PPS. Then, the electric power company receives the consignment charge from Energy Net. Next, the effect of each person's transaction is considered as follows. For the power generation company, there is a possibility that unscheduled power and peak power can be purchased cheaply (Merit 1), and the possibility of receiving a power supply command decreases (Merit 2). Furthermore, since it is possible to respond in a short time unit, Merit 1 is amplified (Merit 3). For consumers, there is a possibility that unscheduled power that can be sold or peak power will be sold higher (merit 1), and the possibility of receiving a power supply command decreases (merit 2). Further, since it becomes possible to respond in a short time unit, Merit 1 is amplified (Merit 3). Further, for the PPS, the transaction power increases (merit 1) and the possibility of receiving a power supply command decreases (merit 2). Merit 1 is amplified because measures can be taken on a short-time basis (merit 3). For Energy Net, the frequency of needs of power producers and consumers increases, so a trading market can be established with a small number of players (merit 3). Finally, the electric power company selects a combination of a power generation operator and a customer with few grid operation problems (merit 2), which will share some ancillary functions and peak power supply functions (merit 1). Merit 1 because it can be handled in a short time
Is amplified (Merit 3). In addition, in order to reduce the evaluation unit price of the power generation company as much as possible by performing the series of processing from step 1 to step 17 described above, aiming at the combination of the power generation company and the customer in the same area. Therefore, it is possible to achieve the technical effect of reducing power transmission loss. FIG. 8 shown below is a diagram showing a market price determination mechanism relating only to actual demand. D
ⁱ means a consumer, S ^j means a supplier, and EN means an energy net. From this figure, the market price P ⁿ t for each iteration
_It can be seen that the electric energy Q ⁿ t _{0 + Δ} commensurate with _{0 + Δ} is matched in ascending order of the bid price. For demand / supply balances that could not be matched up to the Nth supply, the bid will be made again at the (n + 1) th new price. This is repeated up to t _0-Δ-δ to match supply and demand. As a result, the remaining supply / demand mismatch is eliminated by utilizing the system margin time δ. Between t0 _{+ [Delta]-[delta]} and t0 _{+ [Delta} ], EN makes the final adjustment. The unbalanced amount of all bided electricity will be allocated to the demand side at the final balance price to ensure the same amount at the planning stage.
Further, FIG. 9 is a diagram showing a financial market pricing mechanism (potential potential optionization). Here, P
There are two PS companies, one is a supplier (PPSA) and the other is a consumer (PPSB). Consumer (PPS
B) is expected to have sufficient demand from customers in the jurisdiction, but if its own power supply is insufficient, it is possible to purchase the surplus power sold by other PPSA as an option for this shortfall to meet its own demand. Sell to home.

As described above, according to the present invention, there is a possibility that the power generation company can buy the unscheduled power or the peak power at a low price, and the possibility of receiving the power supply command is reduced. Furthermore, since it is possible to respond in a short time unit, there is a possibility that unscheduled power and peak power can be purchased at lower prices. From the perspective of consumers, there is a possibility that unscheduled power that can be sold and peak power will be sold higher, and the possibility that a power supply command will be received decreases. Furthermore, since it is possible to respond in a short time unit, there is a possibility that unscheduled power that can be sold and peak power will be sold even higher. Further, the PPS is less likely to receive an increase in transaction power and receive a power supply command. Since it will be possible to respond on a short-time basis, it is possible to expect a further increase in transaction power.
For Energy Net, the frequency of needs of power producers and consumers increases, so a trading market can be established with a small number of players. For the electric power company, the ancillary function and the peak power supply function are shared to some extent, and a combination of a power generation operator and a customer with few problems in grid operation is selected. In addition, in order to reduce the evaluation unit price of the power generation company as much as possible, since it is aimed at the combination of the power generation company and the customer in the same area, it is possible to achieve the technical effect of reducing transmission loss.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a system of the present invention.

FIG. 2 is a diagram showing a terminal and a PPS server in detail.

FIG. 3 is a configuration diagram when an energy net server is interposed between a PPS server and a power company.

[Figure 4] Shows the output of the generators of the electric power company and the power generation company
Fig.

FIG. 5 is a flowchart of electric power trading.

FIG. 6 is a flowchart of electric power trading.

FIG. 7 is a diagram showing an effect of each player by power trading.

FIG. 8 is a diagram showing a market price determination mechanism relating only to actual demand.

FIG. 9 is a diagram showing a financial market price determination mechanism.

[Explanation of symbols]

G1, G2 ... power generation _{facility, B} 1 ~B 9 _{... branch, N} 1 ~
N ₁₆ ... Node, T ₂₃ , T ₂₄ , T ₃₃ , T ₃₄ ... Information terminal, L ₅ , L ₆ , L ₂₂ , L ₂₃ , ... Consumer, N
W, NW ₁ , NW ₂ ... Network, S, S ₁ , S ₂ ,
ENS ... server device, EPCO ... power company.

Continued front page    (72) Inventor Osamu Sato             1-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Toshiba headquarters office (72) Inventor Yoshihiro Kanno             2-1, Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa             Ceremony Company Toshiba Hamakawasaki Factory (72) Inventor Keizo Honda             1-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Toshiba headquarters office (72) Inventor Yuji Hoshino             1-1 Shibaura, Minato-ku, Tokyo Co., Ltd.             Toshiba headquarters office F-term (reference) 5G064 AA07 AB03 AC01 AC05 AC09                       CB08 CB12 DA01                 5G066 HA17 HA30 HB02

Claims (10)

[Claims] 1. A power transmission control system that outputs a control command to a plurality of power generation facilities connected to different nodes to supply power to a load of a power consumer, and stores node position information of each power generation facility. Means for inputting output information of each of the power generation equipment, means for inputting power consumption information of a load of an electric power consumer, and means for inputting power stability information of a node connected to each power generation equipment, Means for calculating a total value to be output from the power generation facility using the power consumption information of the power consumer, and obtaining a value to be output for each power generation facility based on the power stability information; A means for outputting a control command to each of the power generation equipments based on the value to be output of each of the power generation equipments obtained by the means, and a power transmission control system comprising: 2. A power transmission control system for outputting a control command to a power generation facility for supplying power to a load of a power consumer, wherein node location information, operation plan information and response performance information of the power generation facility are stored. Means for inputting power stability information of a node connected to the power generation equipment, and output of the corresponding power generation equipment based on the stored node position information of the power generation equipment and the input power stability information And a means for controlling so as to change the output of the power generation equipment so that the amount of power generation for a predetermined time is approximately equal to the operation plan based on the stored response performance information. An electric power transmission control system characterized by comprising: 3. A consumer monitoring control terminal for collecting power information of a load of an electric power consumer, a power generation operator monitoring control terminal for outputting a control command to a plurality of power generation facilities connected to different nodes, respectively. In a power transmission control system having each monitor control terminal and a server device connected via a network, the consumer monitor control terminal includes means for collecting power information and transmitting the power information to the server device. The supervisory control terminal stores the operation plan information of the power generation equipment, the means for outputting a control command to the power generation equipment based on the operation plan information, and the output information of the power generation equipment to be transmitted to the server device. And a means for storing operation plan information of each power generation facility and node position information of the power generation facility connected to the server device; A means for receiving power information from the home monitoring control terminal, a means for receiving output information of the power generation equipment sent from the power generation operator monitoring control terminal, and power stability information of a node connected to the power generation equipment. For each power generation facility, based on the input means, the received output information of the power generation facility, the power information from the consumer monitoring control terminal, and the input power stability information and the stored node position information. Means for changing the operation plan, and means for transmitting a change command of the operation plan to the power generation operator monitoring control terminal which should change the operation plan, and the power generation operator monitoring control terminal, An electric power delivery control system, which receives an operation plan change command sent from the server device and changes the operation plan information stored in the terminal. 4. A power transmission control system, comprising: a power generation company supervisory control terminal that outputs a control command to a power generation facility; and a server device that is connected to each of the supervisory control terminals via a network, wherein: The monitoring control terminal for use, means for storing operation plan information and response performance information of the power generation equipment, means for outputting a control command to the power generation equipment based on this operation plan information, and power stability information from the server device. The means for receiving and controlling the output of the power generation equipment in the power stable direction based on the received power stability information, and the power generation amount for a predetermined time based on the stored response performance information and the operation plan. A power transmission control system comprising: means for controlling to change the output of the power generation equipment so as to be approximately equal. 5. The electric power transmission control system according to claim 3 or 4, wherein the server device is provided with means for storing nodal cost coefficient information representing a relationship between a power transmission line access cost of each node and a power generation facility output, Transmission line access cost information is input as power stability information, the power generation output of the corresponding power generation facility is calculated using this transmission line access cost information and the stored nodal cost coefficient information, and the power generation facility is based on this calculation result. A power transmission control system, which outputs a control command to the power transmission control system. 6. The power transmission control system according to claim 3, wherein the server device stores nodal cost coefficient information indicating a relationship between a power transmission line access cost of each node and a power generation facility output, and the power. Means for inputting power generation output change request information as stability information, calculating a power generation output of the corresponding power generation equipment based on the information, and outputting a control command to the power generation equipment based on the calculation result, And a means for calculating a transmission line access cost based on the nodal cost coefficient information and outputting the calculation result. 7. A power trading method for adjusting demand information regarding power sale and power purchase from a power sales candidate and a power purchaser through a computer network, wherein the power sales candidate, power sale period, power sale price. Power purchase request information including information about the power purchase amount, power purchase period, and power purchase price from the power purchase applicant, and the power sale request information including predetermined information. The first adjustment step of deciding a combination of a person who wants to buy electricity and a person who wants to buy electricity, and a first adjustment step for notifying the general electric power company,
Of notifying power sale permission information or power purchase permission information based on the combination obtained in the adjustment step, receiving power supply request information for each node from a general electric utility, and based on the power supply request information In the second adjustment stage, which re-adjusts the combination of the electricity sales applicant and the electricity purchase applicant, and if the power supply demand of the general electric utility is satisfied in this second adjustment stage, the combination based on this stage is used. ,
Notifying the power sale applicant or the power purchase applicant of the power sale change information or the power purchase change information and the power supply availability information to the general electric power company, while supplying the electric power of the general electric power company. And a step of notifying the general electric power utility of the information that the electric power cannot be supplied when the demand is not satisfied, the electric power trading method. 8. A power transaction method for adjusting power sale and power purchase request information from a power sale applicant and a power purchase applicant through a computer network, wherein the power sale applicant, power sale period, and power sale price. Power purchase request information including information about the power purchase amount, power purchase period, and power purchase price from the power purchase applicant, and the power sale request information including predetermined information. A first adjusting step of deciding a combination of a person who wants to purchase electricity and a person who wants to purchase electricity, and notifying the general electric power supplier of the power supply request information for each node from the general electric power supplier; A second adjustment step for re-adjusting the combination of the power sales applicant and the power purchase applicant based on the above, and the sale of the power sales applicant by the combination obtained in the first adjustment step. If there is a difference between the amount of electricity available and the amount of electricity available for sale by the person who wants to sell electricity due to the combination obtained in the second adjustment step, the step of calculating the price based on the difference and On the other hand, the step of presenting the calculated price information and the available power supply amount information, the step of inputting the decision information from the general electric power company, and the combination of the electricity sales applicant and the electricity purchase applicant based on the decision information. And the third adjustment stage for re-adjusting the power supply, and based on the combination by the first adjustment stage when the power supply information is not received from the general electric utility, or the power supply information is received from the general electric utility. In this case, the step of notifying the power sale applicant or the power purchase applicant of the power sale permission information or the power purchase permission information based on the combination in the third adjusting step is included. Characteristic power trading method. 9. The power trading method according to claim 7, wherein the predetermined condition is that the power sales applicant or the power purchase applicant is connected to a power transmission and distribution system of a plurality of general electric power companies. In this case, the power trading method is characterized in that the combination of the power sales applicant and the power purchase applicant is adjusted so that the total amount of trading transactions by the same general business operator is maximized. 10. The electric power transaction method according to claim 7, wherein the electric power supply request information from the general electric utility is:
A power transaction method characterized by receiving as a transmission line access cost.