JPH05284649A - Power distribution control system - Google Patents

Abstract

PURPOSE:To provide a power distribution control system wherein a power company determines an amount of load to be reduced, a time when the load is reduced, and an incentive amount of money, based on a current power demand, season, weekday, time, atmospheric temperature, etc., and then presents the items thus determined on a communication line to each client who offers a tender and then the power company selects a client who accepts the tender thus distributing power appropriately. CONSTITUTION:Variation of demand of each client is predicted at a communication terminal S on the power company side based on a current demand, season, weekday, time, atmospheric temperature, and the like. When a total demand thus predicted exceeds supply capacity, an amount of load to be reduced, a time when the load is reduced, and an incentive amount of money are calculated at the communication terminal S on the power company side and presented to communication terminal 1-4 of each client. Each client calculates an amount of power to be reduced and a time when power is reduced and responds to the communication terminal S with a tender signal for power reduction. The communication terminal S delivers a tender acception signal to a selected client. The selected client reduces the amount of power in response to the tender acception signal. According to the system, power is distributed properly to each client.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power distribution control system, and more particularly to a power distribution system that distributes power by transmitting and receiving signals between terminals of a power company and terminals such as homes and factories. It is a thing.

[0002]

2. Description of the Related Art In recent years, there has been a large difference in power consumption throughout the year, for example, it generally peaks during the summer days,
Off-peak on winter nights. Electricity facilities are being built for the peak.

However, as the demand for households, mainly air conditioners, increases, the difference between peak and off-peak increases. As a result, the annual average load on the supply capacity, that is, the load factor, decreases year by year, and the power production cost rises. Therefore, there is an increasing need for load leveling.

Therefore, conventionally, there is a system in which the power supply to the load such as the air conditioner is forcibly stopped irrespective of the consumer's intention according to the need of the power supplier, and instead a predetermined amount of incentive is paid. is there. In the United States, for example, a so-called spot where the electric power company calculates the electric power charge by calculating the expected electric power based on the electric power predicting factor one day before the relevant day, and unilaterally notifies the calculated electric power charge to the customer side. Some are based on a fee system.

Further, in a paper entitled "During load control control proof test (air conditioner control)" at the Japan Institute of Electrical Engineers power and energy section conference in 1991, the power supply of the air conditioner is intermittently turned on and off as a control method of the air conditioner. The method to do is proposed.

[0006]

However, when the power supply to the load is forcibly stopped, it is effective to reduce the peak power, but it is necessary to completely ignore the circumstances of each home or factory. Become. In addition, even if based on the spot charge system, the power charge is calculated one day before the relevant day,
Since it is based on the demand forecast, there is a problem that it is not possible to accurately reflect changes in demand that change with changes in weather and climate, and there is not a significant effect on the reduction of peak power. Furthermore, the air conditioner is turned on and off intermittently.
When the F control is performed, the control target is limited to the air conditioner, so that there is a problem that effective load leveling cannot be achieved.

Therefore, an object of the present invention is to provide an electric power distribution control system capable of distributing electric power and leveling the load in consideration of time-varying demands and circumstances of each home, factory and the like. It is what

[0008]

In a power distribution control system according to the present invention, firstly, a center side communication terminal is operatively connected to the center side communication terminal via a communication line and connected to a load group. A plurality of customer side communication terminals connected to each other, the center side communication terminal is input from the customer side communication terminal, and a presentation signal output means for outputting a presentation signal including a load reduction request time to the customer side communication terminal. Selection signal output means for outputting a selection signal to one or a plurality of customer side communication terminals having a small incentive amount based on a response signal, wherein the customer side communication terminal is provided in a presentation signal from the center side communication terminal. Response signal output means for outputting a response signal including a load reduction request time and an incentive amount calculated based on one or more reduction potentials to the center side communication terminal; It is characterized in that it has a power reduction means for reducing the predetermined time the power supply to the load group based on a selection signal from the terminal.

Secondly, it has a center side communication terminal and a plurality of customer side communication terminals operatively connected to the center side communication terminal via a communication line and connected to a load group. A center side communication terminal, a presentation signal output means for outputting a presentation signal including a load reduction request time to the customer side communication terminal,
A selection signal that outputs a selection signal to one or more customer communication terminals selected by a function having parameters of the incentive amount of money, the amount of power reduction and the time of reduction based on the response signal input from the customer communication terminal The customer side communication terminal has an output means, and outputs the power reduction amount, the reduction time and the incentive amount calculated based on the load reduction request time in the presentation signal from the center side communication terminal and one or more reduction potentials. Response signal output means for outputting a response signal containing the same to the center side communication terminal, and power reduction means for reducing the power supply to the load group for a predetermined time based on the selection signal from the center side communication terminal. It is a thing.

Thirdly, it has a center side communication terminal and a plurality of customer side communication terminals which are operatively connected to the center side communication terminal via a communication line and connected to a load group. The center-side communication terminal outputs a presentation signal including a load reduction request time and an incentive amount to the customer-side communication terminal, and a reduction power amount and a reduction time based on the response signal output from the customer-side communication terminal. A selection signal that outputs a selection signal including the reduction time calculated by the reduction power amount and the reduction time in the response signal, the reduction power amount, and the incentive amount to one or a plurality of customer communication terminals having a large product of Output means, and the customer side communication terminal calculates based on the load reduction request time, the incentive amount and one or more reduction potentials in the presentation signal from the center side communication terminal. Response signal output means for outputting a response signal including the reduced power amount and reduced time to the center side communication terminal, and power reducing means for reducing the power supply to the load group for a predetermined time based on the selection signal from the center side communication terminal It is characterized by having.

Fourthly, in the above-mentioned first, second or third configuration, the center side communication terminal further calculates the forecast demand based on the demand forecast potential,
It is characterized by further comprising price signal output means for comparing the predicted demand with the power supply capacity to determine a power price and outputting a power price signal including the determined power price to the customer side communication terminal.

[0012]

In the power distribution control system according to the present invention, the center side communication terminal outputs the presentation signal including the load reduction request time to the customer side communication terminal by the presentation signal output means. The customer communication terminal that has received the presentation signal calculates an incentive amount based on the load reduction request time and the reduction potential in the presentation signal, and outputs a response signal including the incentive amount to the center communication terminal. Based on the response signal, the center-side communication terminal outputs a selection signal to one or more customer-side communication terminals with small incentive amounts. The customer-side terminal that has received the transmission of the selection signal reduces the power supply to the load group for a predetermined time based on the selection signal.

In the second configuration, the center side communication terminal outputs the presentation signal including the load reduction request time to the customer side communication terminal by the presentation signal output means. The customer communication terminal that has received the presentation signal outputs to the center communication terminal a response signal including the reduced power amount, the reduction time, and the incentive amount calculated based on the load reduction request time and the reduction potential in the presentation signal. The center-side communication terminal sends a selection signal to one or a plurality of customer-side communication terminals selected based on a response signal input from the customer-side communication terminal by a function having parameters of the incentive amount of money, the amount of power reduction and the time of reduction. Output. The customer communication terminal that has received the transmission of the selection signal reduces the power supply to the load group for a predetermined time based on the selection signal.

Further, in the third configuration, the center side communication terminal outputs the presentation signal including the load reduction request time and the incentive amount to the customer side communication terminal by the presentation signal output means. Upon receiving the presentation signal, the customer communication terminal calculates the reduction power amount and the reduction time based on the load reduction request time, the incentive amount and the reduction potential in the presentation signal, and outputs the response signal including the reduction power amount and the reduction time. Output to the communication terminal on the center side. The center-side communication terminal outputs to the customer-side communication terminal a selection signal including the reduced power amount and the reduced time calculated based on the reduced power amount and the reduced time in the response signal. The customer-side terminal that has received the transmission of the selection signal reduces the power supply to the load group for a predetermined time based on the selection signal.

Further, in the fourth configuration, in addition to performing the above control, a power price signal including the power price determined by the center side communication terminal is output to the customer side communication terminal to sequentially notify the power price.

[0016]

Embodiments of the present invention will be described with reference to the drawings.

In the power distribution control system shown as the first embodiment, as shown in FIG. 1, a plurality of customer side communication terminals 1 to n are connected to a power company side communication terminal S as a center side communication terminal. , And each customer side communication terminal is connected to a load group such as each home or factory.

Here, the terminal S on the electric power company side has a forecast demand calculation means, and the present demand (X1), season (X2),
By inputting the day of the week (X3), the time (X4), the temperature (X5), the event schedule (X6), the TV audience rating (X7), etc., the function U1 = F1 (X1, X2, X3, X
4, X5, X6, ...) to calculate the predicted demand U1. The expected demand is calculated, for example, every 30 minutes.

Next, the predicted demand and the supply capacity are compared to determine whether or not to make a load reduction presentation request. Even if the forecasted demand does not exceed the supply capacity, it is sometimes better to reduce the demand at the cost of lower incentives than to raise the power generation with high marginal cost. It may be determined whether to make a reduction presentation request by. Here, the incentive is given as a reward instead of reducing power, and is proportional to the amount of power reduction.

Here, when the load reduction presentation request is made, the load reduction time is calculated by calculating the time zone in which the calculated predicted demand exceeds the supply capacity, and further the incentive amount is determined. The incentive amount is determined by the above marginal cost, the situation of responses from the customer side in the past, and the like.

Next, the electric power company side terminal S outputs a presentation signal including the load reduction request time and the incentive amount to each of the customer side communication terminals 1 to n, as shown in FIG.
Send.

Each customer communication terminal 1 to 1 that has received the presentation signal
n considers the reduction potential, which is the reduction factor, while considering the load reduction request time and the incentive amount,
Whether or not it is possible to reduce the supplied power is calculated, and if possible, the amount of reduced power and the reduction time are calculated. Here, as reduction potentials, events, work schedules (Xc1), air conditioning load reduction (Xc2), water heater operation time shift (Xc3),
Partial stop of elevator (Xc4), partial turn-off of lighting (Xc5), partial stop of computer (Xc6), loss due to partial stop of factory (Xc7), etc. The reduction potential Xc is calculated based on the above factors.

When the power can be reduced, the reduced power amount U2 and the reduced time U3 are the load reduction request time (Xa) in the presentation signal, the incentive amount (Xb), and the calculated reduction potential (Xc). Considering the given functions U2 = F2 (Xa, Xb, Xc) and U3 = F
3 (Xa, Xb, Xc). When the customer-side communication terminals 1 to n calculate the reduced power amount and the reduced time,
A bid signal as a response signal including the reduced power amount and the reduced time is output to the power company terminal S. Depending on the content of the presentation signal from the power company side communication terminal S, the customer side communication terminal may not output the bid signal.

The communication terminal S on the power company side that received the bid signal
Has a function of selecting an arbitrary number of customers having a large product of the reduced power amount and the reduced time in each bid signal, and performs selection according to the function. That is, a successful bid is made. When a customer is selected, the power company side communication terminal S transmits a successful bid signal as a selection signal including the reduced power amount, the reduction time and the incentive amount to the selected customer side communication terminal. For example, as shown in FIG. 2, when the second customer communication terminal 2 is selected, a successful bid signal is transmitted to the second customer communication terminal 2. The power reduction amount, the reduction time, and the incentive amount in the transmitted successful bid signal are calculated based on the reduction power amount and the reduction time in the bid signal from each customer communication terminal. Note that a signal indicating that the customer has not been selected may be output to the customer communication terminal that has not been selected.

Upon receiving the successful bid signal, the customer communication terminal reduces the power supply to the connected load group according to the reduced power amount and the reduced time in the successful bid signal.

As a second embodiment, unlike the above embodiment, the center side communication terminal outputs a presentation signal including only the load reduction request time, and the customer side communication terminal is based on the reduction request time and the reduction potential. In addition to calculating the incentive amount, the bid signal as a response signal including the calculated incentive amount is output to the center-side communication terminal, and the center-side communication terminal selects one or more customers with low incentive amount, and the customer You may make it transmit a successful bid signal as a selection signal with respect to the side communication terminal.

Furthermore, as a third embodiment, the center side communication terminal outputs a presentation signal including only the load reduction request time, and the customer side communication terminal reduces the amount of power consumption and the reduction based on the reduction request time and the reduction potential. The time and the incentive amount are calculated, and a bid signal as a response signal including the calculated reduced power amount, the reduced time and the incentive amount is output to the center side communication terminal, and the center side communication terminal outputs the reduced power amount. It is also possible to select one or a plurality of customers by a function using the reduction time and the incentive amount of money as parameters, and send a successful bid signal as a selection signal to the customer side communication terminal.

Further, in the embodiment shown as the fourth embodiment, a plurality of customer side communication terminals are connected to the electric power company communication terminal as in the first embodiment, and the electric power company communication terminal is currently in demand ( X1), season (X2), day of the week (X3),
By inputting time (X4), temperature (X5), event schedule (X6), TV audience rating (X7), etc., the function U1 = F1 (X1, X2, X3, X4, X5, X6).
...) is used to calculate the forecast demand U1, and the forecast demand and the power supply capacity are compared to determine a power price. Specifically, in determining the power price, if the predicted demand exceeds the power supply capacity, the power price is set higher. This is because the demand does not exceed the supply capacity, and when the demand for electric power is large, the ratio of oil and coal-fired power generation, which has a high unit price of power generation, increases. On the contrary, when the expected demand is lower than the power supply capacity, the power price is set to be low so that an appropriate profit can be obtained. The determination of the power price is performed, for example, every 30 minutes.

When the power price is determined, the power company communication terminal outputs a power price signal including the determined power price to each of the customer side communication terminals connected to the power company communication terminal. When the present embodiment is applied, the case where the customer side is equipped with private power generation equipment is mainly targeted. That is, the customer side communication terminal compares the power price in the power price signal transmitted from the power company communication terminal with the power cost in the case of private power generation, and determines which one to select. The demand forecast may be determined by adding the planned purchase amount X8 on the customer side to the variable of the above function and inputting it to the communication terminal on the electric power company side in advance from the communication terminal on the customer side.

According to this embodiment, there is an advantage that the equipment cost and the communication cost can be reduced as compared with the case of the first, second and third embodiments.

The fifth embodiment shown below is a combination of the first embodiment and the fourth embodiment as shown in FIG. 3, and the power distribution control and the first embodiment shown in the first embodiment are performed at predetermined intervals. Four
The power distribution control shown in the embodiment is alternately performed. According to the present embodiment, finer power distribution control can be performed as compared with the above embodiment.

The control shown in the second embodiment and the control shown in the fourth embodiment may be performed alternately, or the control shown in the third embodiment and the control shown in the fourth embodiment may be performed alternately. ..

[0033]

According to the power distribution control system of the present invention, it is possible to distribute the power and level the load in consideration of the time-varying demand and the circumstances of each home, factory, and the like. In particular, since the customer bids for the presentation from the center and the center bids for the customer's bid, it is possible to optimally distribute the power in consideration of the circumstances of both the center and the customer. ..

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a power distribution system according to the present invention.

FIG. 2 is an explanatory diagram showing an operating state of the power distribution system according to the present invention.

FIG. 3 is an explanatory diagram showing an operating state of the power distribution system according to the fifth embodiment of the present invention.

[Explanation of symbols]

 S Power company side communication terminal 1 First customer side communication terminal 2 Second customer side communication terminal 3 Third customer side communication terminal 4 Fourth customer side communication terminal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Rieko Iwatsubo 2-14-40 Ofuna, Kamakura-shi, Kanagawa Mitsubishi Electric Corporation

Claims (4)

[Claims] 1. A center-side communication terminal, comprising: a center-side communication terminal; and a plurality of customer-side communication terminals operatively connected to the center-side communication terminal via a communication line and connected to a load group. , A presentation signal output means for outputting a presentation signal including a load reduction request time to the customer side communication terminal, and one or more customer side communication terminals with a small incentive amount based on the response signal input from the customer side communication terminal Selection signal output means for outputting a selection signal according to the present invention, wherein the customer side communication terminal includes the load reduction request time in the presentation signal from the center side communication terminal and the incentive amount calculated based on one or more reduction potentials. Response signal output means for outputting a response signal to the center side communication terminal, and power saving for reducing the power supply to the load group for a predetermined time based on the selection signal from the center side communication terminal. Power distribution control system characterized by a means. 2. A center-side communication terminal, comprising: a center-side communication terminal; and a plurality of customer-side communication terminals operatively connected to the center-side communication terminal via a communication line and connected to a load group. , A presentation signal output means for outputting a presentation signal including a load reduction request time to a customer side communication terminal, and a function having parameters of a reduced power amount, a reduction time and an incentive amount based on a response signal input from the customer side communication terminal A selection signal output means for outputting a selection signal to one or a plurality of customer side communication terminals selected by the customer side communication terminal, and the customer side communication terminal has a load reduction request time in the presentation signal from the center side communication terminal. And a response signal output means for outputting to the center-side communication terminal a response signal including the reduced electric energy, the reduction time, and the incentive amount calculated based on one or more reduction potentials. Power distribution control system, comprising a power supply to the load group based on a selection signal from the center-side communication terminal and a power reducing means for reducing the predetermined time. 3. A center-side communication terminal comprising: a center-side communication terminal; and a plurality of customer-side communication terminals operatively connected to the center-side communication terminal via a communication line and connected to a load group. The product of the reduction power amount and the reduction time is large based on the presentation signal output means for outputting the presentation signal including the load reduction request time and the incentive amount to the communication terminal on the customer side and the response signal output from the communication terminal on the customer side. Selection signal output means for outputting a selection signal including the reduction time calculated by the reduction power amount and the reduction time in the response signal, the reduction power amount, and the incentive amount to one or more customer communication terminals. Then, the customer side communication terminal calculates the power reduction based on the load reduction request time, the incentive amount, and one or more reduction potentials in the presentation signal from the center side communication terminal. And a response signal output means for outputting a response signal including a reduction time to the center side communication terminal, and a power reduction means for reducing the power supply to the load group for a predetermined time based on the selection signal from the center side communication terminal. Power distribution control system characterized by. 4. The center-side communication terminal further calculates a forecast demand based on the demand forecast potential, compares the forecast demand with the power supply capacity to determine a power price, and a power price signal including the determined power price. 4. The power distribution control system according to claim 1, further comprising a price signal output means for outputting the price signal to the customer side communication terminal.