JPH10197563A - Maximum demand cutting energy calculating device by demand control - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance calculating accuracy of a maximum demand cutting energy, and present an accurate electricity rate cutback amount to a consumer by finding the maximum demand cutback quantity from a maximum demand found by an operation by demand control instead of an umeasurable maximum demand value. SOLUTION: A demand before a demand control command is issued, a demand of an electric load cutoff period when the demand control command is issued, a demand on and after an electric load is inputted again by the completion of a control command and a maximum demand DE calculated by data on its issuing period, an non-issuing period, the issuing time or the like, are substituted with an unmeasurable maximum demand (a maximum demand value) RR, and a maximum demand cutting energy DS is calculated. An energy charge cutting amount MS by demand control is calculated from this cutting energy DS, and is presented and submitted to an electric power demand consumer where a demand controller is installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0101]

[Industrial applications] Electricity is supplied by a power supply company based on a system in which a basic electricity charge is determined based on the maximum demand power measured by a 30-minute maximum demand power meter that is supplied by the power supply company. It is available to electricity consumers who have been collected and are or willing to perform demand control.

[0092]

BACKGROUND ART demand controller if previously set predetermined power demand value (expressed by the following set demand value referred D _d) likely to exceed the maximum demand power demand desired as to kept below the value in the apparatus the power demand issued to cut off the electrical load of the part that has been preselected to stepwise or simultaneously to control such that does not exceed a D _d the control instructions, possible to weigh the D _R is not And
Therefore To investigate whether produced or M _S could reduce the extent of D _S conventionally common that compares the maximum demand power and D _C previous contemporaneous its demand controller is introduced, a method that compares I and after introduction with previous maximum demand power demand controller is introduced D _R to study not only the accuracy of at a on the assumption that increases and decreases at a constant rule is or is the same As a result, electric consumers could not clearly grasp the effect of demand control during the operation of the demand controller after the introduction of the demand controller, and the demand controller introduction company could not clearly guarantee the effect.

[0093]

Calculate the M _S a D _S when THE INVENTION you are trying to solve problems] demand controller is not installed and when installed more calculated improve the accuracy of that value, its data using the public telephone line as required It is an object of the present invention to solve this problem by automatically transferring the data to a distant management center, recording and managing the data, and enabling the data to be presented and submitted to an electric customer with a demand controller.

[0093]

If it is possible to weigh the D _R Means for Solving the Problems] easily using (Equation 1) it is possible D _S Omeru but impossible be determined by measuring the D _R D _Rた め
D by obtaining by calculation _{D E} standing on the assumption D _E
Seek _S, the electricity charge calculation formula of the electrical supply company by substituting this D _S calculates M _S, also utilizing the public telephone line as required to automatically forward these data to a remote management center of the recording management Then, the data can be presented and submitted to the demand controller installation electric customer.

[0056]

[Action] is possible M _S by the demand controller introduced by the device of the present invention is clearly calculated, electrical consumers are able to confirm clearly the amortization period for the investment amount of the savings line demand controller after demand controller introduced working , Demand controller introduction company also _MS
Can be guaranteed.

[0086]

[Embodiment] In this embodiment, a description is given of a case where the cut-off and input of some electric loads by demand control are performed collectively. The 30-minute maximum demand power meter installed by the power supply company measures the demand power. In each of the 30 minutes, 30 minutes when the maximum demand power is generated is T ₃₀ , and the number of demand control issuances during the T ₃₀ is n times. The electric load interruption period by the control issuance is defined as TC ₁ , TC ₂ , T
C ₃ , to TC _n , and the power demand in each period is DC
₁ , DC ₂ , DC ₃ , to DC _n , and T ₃₀ , the demand control is not issued and the electric load is not cut off is TR ₁ , TR ₂ , TR ₃ , to TR _n , the demand of each period Assuming that the power is DR ₁ , DR ₂ , DR ₃ , to DR _n , their relationships are as shown in FIG. 1, and their relational expressions are expressed by the following (Expression 3), (Expression 4), and (Expression 5). Is done. Or (Formula 3) (Formula 4) (Formula 5) the relationship (Equation 2) is substituted into D _S is M _S can be calculated by substituting this value can calculate the base charge conversion formula of the electric power supply company .

007

M _S D _S is can be calculated from the results in the calculation formula as in the above, according to the present invention can be calculated with a high degree of accuracy, due to this by the electrical consumers is clear demand controller introduced the results after the introduction of the demand control M _S can be checked, can be checked whether the energy-saving amortization period of relative to the investment of the introduction of the demand controller is on schedule, and the guarantee of the value stated is a possible demand controller introduction skilled in the art M _S is such that enables accurate become.

[0098]

[Brief description of the drawings]

FIG. 1 is a relationship diagram of DC _n , DR _n , TR _n , and TC _n .

FIG. 2 is a block diagram of an embodiment.

[0099]

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Electric substation equipment 2 30-minute maximum demand electricity meter 3 Demand controller 4 The present invention device (Calculation device of maximum demand power reduction by demand control) 5 Data communication cable 6 Telephone public line 7 Management center 8 Demand controlled electric load 9 Demand Control control cable 10 Electric wiring

Claims (2)

[Claims] When a peak power equal to or more than a certain value (hereinafter, referred to as a certain peak power) is generated, a part of the electric load is stepwise or collectively shut off to control the peak power (hereinafter, demand control). The maximum demand (the maximum value of the demand for electricity
The value measured by the 30-minute maximum demand power meter installed by the power supply company) is clearly reduced as compared with that without the demand control, and after the demand control is performed and the demand is reduced. maximum demand power is referred to as "control demand value" (hereinafter represented by D _C), the maximum demand power when demand control at a the constant peak power generation timing is assumed to have not been performed at all the "maximum demand value" call (hereinafter represented by D _R), (represented by the following D _S) constant during peak power generation the difference between the maximum demand power demand control is reduced by being performed is referred to as "maximum demand power reduction amount" their relationship Is given by the following equation. _{D S = D R -D C ···} ( Equation 1) _{D C} can weighing by 30 minutes maximum demand power meter for equipment of the electric power supply company, since _{D R} would be cut off the power load the actual demand control weighing is impossible, since this reason the electric load by electric power demand and demand control instruction completion of this D _R demand control instruction issued earlier demand power line demand control instruction electrical load shedding period in issued is turned again demand power, and its issuance period, non-issued period, replacing the maximum demand power calculated by data such as the issuance time (represented by the following predicted demand value and call D _E), i.e. D _R
Assuming ≒ _DE , the following relational expression holds. _{D S = D E -D C ···} ( Equation 2) to calculate the _{D S} by using the (expression 2), also reduced (hereinafter electricity rate savings of electricity charge by how much demand control from the _{D S} and called M represented by _S) is calculated or not the practice, maximum power demand reductions by actually performing apparatus (hereinafter referred to as demand controller) installed electric consumers in the presentation submission can be as devised the demand control of the demand control Computing device. Wherein additional functions Forwards recording management to distant control center has been devised such that it at data telephone public line D _S and M _S that is calculated in the manner described in claim 1 The maximum demand power reduction calculation device by demand control installed in Japan.