KR101603045B1 - Energy scheduling apparatus and method for estimating user's inconvenience using thereof - Google Patents

Abstract

Provided are an energy scheduling apparatus and a method for estimating user inconvenience by using the same. When an energy scheduling apparatus according to an embodiment of the present invention performs a scheduling for supplying power to each device using power, the method for estimating user inconvenience caused by a power supply delay comprises the steps of: (a) acquiring a preferred operating time and an actual operating time of each device using power; (b) matching the preferred operating time and the actual operating time with a time slot; and (c) estimating user inconvenience of each device using power based on a weight according to a slot start point of the actual operating time with respect to a slot section of the preferred operating time, the total number of slots, and a delay time at each slot.

Description

[0001] ENERGY SCHEDULING APPARATUS AND METHOD FOR ESTIMATING USER'S INCONVENIENCE USING THEREOF [0002]

The present invention relates to energy scheduling technology of a grid-connected renewable energy system.

Recently, Smart Grid and Energy Storage System (ESS) have been attracting much attention in the field of ESS. In case of power shortage of ESS, renewable energy, or power from a power grid.

And if real-time power usage is high, power usage can be delayed or blocked depending on the importance of power usage.

However, such a conventional ESS management method has a problem in that a high price electricity bill may be imposed on the consumer because electric power is continuously supplied from the electric power grid regardless of an increase in the electric charge, have.

In addition, when storing renewable energy in the ESS, it is reasonable to use the stored energy at a time when the power consumption is high (high electricity rate) but it does not take such a consideration into consideration. If the power is insufficient, There is no selection criterion for whether to delay or not, and there is a problem that the inconvenience of the power consumer due to the operation delay is not considered at all.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method for estimating inconvenience similar to inconvenience (operation delay time) experienced by a power consumer.

In order to accomplish the above object, there is provided a method of estimating a user's discomfort due to a power supply delay in scheduling in which an energy scheduling apparatus supplies power to each power using apparatus, (B) matching the preferred operating time and the actual operating time to a time slot; and (c) comparing the preferred operating time and the actual operating time with a time slot of the preferred operating time Estimating a user discomfort level of each of the power using devices based on a slot start point of the actual operation time, a total number of slots, and a weight based on a delay time in each slot.

According to an aspect of the present invention, there is provided an energy scheduling apparatus for estimating an inconvenience of a user due to a power supply delay when performing scheduling for supplying power to each power using apparatus according to an embodiment of the present invention, A device information input unit receiving a preferred operation time and an actual operation time of the device, and a controller configured to match the preferred operation time and the actual operation time to a time slot, And a user discomfort estimator estimating a user discomfort level of each of the power using devices based on a slot start point, a total number of slots, and a weight based on a delay time in each slot, And a slot of the actual operating time overlapping with the slot period of the < RTI ID = 0.0 > The user's discomfort is calculated as " 0 ", and the sum of the slot of the actual operation time non-overlapping with the slot section of the preferred operation time and the corresponding weight value is divided by the actual operation time And calculates the user discomfort.

According to an embodiment of the present invention, it is possible to estimate the inconvenience similar to the inconvenience (the operation delay time) that the power consumer actually feels.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the composition of the invention described in the claims.

1 is a diagram illustrating a configuration of an energy scheduling system according to an embodiment of the present invention.
2 is a diagram illustrating a method for calculating a user discomfort level of a scheduling management unit according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating experimental results according to an embodiment of the present invention.
4 is a diagram illustrating experimental results according to another embodiment of the present invention.
5 is a diagram illustrating experimental results according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" .

Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a configuration of an energy scheduling system according to an embodiment of the present invention.

For reference, the energy scheduling system according to an embodiment of the present invention may be based on a finite energy storage device with a real-time electricity pricing scheme and a storage amount.

The energy scheduling system 100 according to an exemplary embodiment of the present invention may include an energy storage device 110, an energy information storage 120, a scheduling management unit 130, and a device load control unit 140.

The energy storage system (hereinafter, referred to as 'ESS') 110 can store the electric power obtained by the photovoltaic / solar power generation, the wind power generation, and the geothermal power generation facility, that is, the renewable energy. have.

On the other hand, the energy information storage unit 120 stores the power generation information according to solar radiation and time in the case of a power plant using solar / solar heat, the power generation information according to the wind amount and the time in the case of a power plant using wind power, In case of using power generation facilities, it is possible to store power generation information according to time.

At this time, the energy information storage unit 120 may store power generation information in units of a specific period (for example, one hour to 24 hours per day), and may also store information about the weather.

The energy information storage unit 120 is connected to the energy scheduling system 100 by the scheduling management unit 130 to be described later so that the operation time of each device (hereinafter referred to as " An operation start time and an end time, etc.), a preferred operation time interval, an estimated power consumption, and an operation priority among devices.

On the other hand, the scheduling management unit 130 manages the energy consumption of each power plant based on the weather, based on the energy production (charge) amount of each power generation facility such as solar / solar heat, wind power, and geothermal power stored in the energy information storage unit 120 Estimated energy production (charge) amount can be estimated.

At this time, the scheduling management unit 130 may use an average value when estimating the expected energy production (charge amount) of each power generation facility, and may set a confidence interval according to the reliability.

For example, if the estimated energy production (charge) at 11:00 averages 1.1KW and the confidence level is 90%, the estimated energy production (charge) is estimated if the confidence interval is 0.5KW to 1.5KW. 0.5 KW can be applied.

In addition, the scheduling management unit 130 controls the operation time (operation start time and end time, etc.) of each power consuming apparatus connected to the energy scheduling system 100 to receive power, a preferred time period (hereinafter, Quot; interval "), power consumption, and operation priority among devices.

To this end, the scheduling management unit 130 receives an operation time for each power using device from a user terminal (a smart phone, a notebook computer, a tablet computer, an IHD device) connected to the energy scheduling system 100, (Not shown) receiving a time interval, an estimated power consumption, and an operation priority order among the devices.

The scheduling management unit 130 may store the information input through the power usage device information input unit (not shown) in the energy information storage unit 120, and may inquire or change the information later.

In addition, the scheduling management unit 130 may update the power consumption amount of each section (total 24 sections) by comparing the estimated power consumption amount of each power consuming apparatus with the actual power consumption amount according to the 24 intervals of 24 hours divided by 1 hour , And the power consumption pattern of each power consuming device during a specific period (for example, 24 hours a day for 1 hour).

For reference, the scheduling principle of the scheduling management unit 130 is to utilize the renewed energy stored in the ESS 110 as much as possible so that each power consuming device operates without supplying power from the grid power network.

However, when the renewable energy stored in the ESS 110 is insufficient, the system power must be used, but if the real-time electricity charge is applied, the electric power is not supplied to the ESS 110 and the consumer can not be satisfied.

Accordingly, the scheduling management unit 130 may select any one of the following three scheduling schemes to supply power to the respective power use devices.

1. Supply power using grid power.

2. Delay the power usage of power consuming devices for a certain time and supply power using energy stored in ESS (110) for a delayed time.

3. Delay the power use of power consuming devices and supply power using grid power.

The scheduling management unit 130 may generate an objective function that minimizes the sum of the power supply delay time and the electricity charge during the three scheduling operations and determine whether to delay the power supply to the power consuming apparatuses based on the generated objective function.

In this case, the scheduling management unit 130 can minimize the electricity rate by utilizing the grid power at a time when the electricity rate is low in advance in case of insufficient energy stored in the ESS 110, The user's inconvenience may be reflected to minimize the inconvenience of the user.

For this, the scheduling management unit 130 matches the preferred operation time and the actual operation time to the time slot, and determines the slot start point and the total number of slots of the actual operation time for the slot period of the preferred operation time, And a user inconvenience estimating unit (not shown) for estimating the user discomfort of each power using device based on the weight based on the delay time.

A method for estimating the user discomfort of the user discomfort estimating unit (not shown) will be described later with reference to Fig.

The scheduling management unit 130 estimates the estimated energy charge amount within a certain confidence level based on the energy storage information stored in the energy information storage unit 120 and can perform scheduling to minimize the electric charge and the delay time based on the estimated energy charge amount .

The above-mentioned contents are expressed by the following mathematical expressions. First, the electric charge of the electric power using device a in which the delay time is reflected is expressed by Equation (1).

a: Power-operated equipment a

t: time slot

T _a : the operating time of the power-using device a

e _a : Power consumption of power-consuming equipment a

α _a : preferred time interval (starting point)

β _a : preferred time interval (ending point) for power consuming device a

g _a : Power source used by a power consuming device a (1: grid power, 0: ESS)

d _a : Delay time applied to power-using equipment a

p (t): Demand Response Electricity Fee

P _a (d _a ): Electricity charge of electric power using equipment a reflecting the delay time

[Equation 1]

On the other hand, the equation for estimating the user's discomfort is shown in the following equation (2).

w ^t _a is the number of timeslots for the operation of power-consuming device a that does not overlap with the preferred time interval in time slot t (non-overlapping)

U _a (d _a ): User inconvenience of the power consuming device a in which the delay time is reflected

&Quot; (2) "

Then, the estimated capacity of the ESS 110 in the time slot k is expressed by Equation (3) below.

c (t): average charge of renewable energy in time slot t

: c(t)에 대한 신뢰 구간 적용 충전량

: the confidence interval applied charge for c (t)

: 예상 충전량

: Estimated charge

: 에너지 소비량

: Energy consumption

&Quot; (3) "

Finally, the equation for scheduling that minimizes the electricity bill and the delay time based on the above equation can be expressed as Equation (4) below.

&Quot; (4) "

Meanwhile, the device load control unit 140 may switch an energy source to be used by each power using device according to a scheduling result of the scheduling management unit 130. [

That is, each of the power consuming devices can be supplied with power through the energy stored in the ESS 110 or the grid power.

2 is a diagram illustrating a method for calculating a user discomfort level of a scheduling management unit (user discomfort estimation unit) according to an embodiment of the present invention.

When the preferred time interval preset by the user with respect to the power use devices a, b, c, and d is as shown in FIG. 2, conventionally, the user's discomfort with respect to the use delay time is measured by merely reflecting the use delay time.

However, in an embodiment of the present invention, as shown in FIG. 2, the preferred operation time and the actual operation time of each power use device are matched to a time slot, and the actual operation The user discomfort of each power using device can be estimated based on the slot start point of time, the total number of slots, and the weight based on the delay time in each slot.

For reference, the operating time of power consuming devices a and d is 3 hours, the operating time of power consuming devices b and c is 6, and the user's discomfort can be calculated as 0 when operating within the preferred time interval.

Conventionally, in order to calculate the user's discomfort with the use delay time, the formula such as the sum of the times of simply using the use or the square of the total delay time is utilized.

For example, the user ' s discomfort for each power using device calculated in Fig.

a = 6,

b = 6,

c = 21,

d = 15.

However, when comparing the operating time of the power consuming devices a and b, it can be seen that the inconvenience of b including the operating time in the preferred time period is lower, and when comparing c and d, , But the result is that the discomfort of c is calculated to be larger.

The method for estimating the user discomfort according to an embodiment of the present invention can calculate the user's discomfort even if the total length of the operation time is divided by the delay time of each time slot and the length of the operation time is different.

That is, in FIG. 2, the user's discomfort with respect to each of the power using devices can be calculated as follows according to the equation (x).

a = 6/3 = 2,

b = 6/6 = 1,

c = 21/6 = 3.5,

d = 15/3 = 5

If you sort them in order, you can see that the user's discomfort increases in order of b, a, c, d.

That is, generally, as the delay time becomes longer, the user's discomfort may be high. However, when the embodiment of the present invention is applied, the inconvenience of the user is calculated by considering the operation time factors together. Similar results can be obtained with the inconvenience.

FIG. 3 is a diagram illustrating experimental results according to an embodiment of the present invention.

3 is a graph comparing an average charge amount stored (charged) in the ESS 110 with a charge amount applied a confidence interval.

Based on the weather information stored in the energy information storage unit 120 and the charge amount according to the power generation facility, the average charge amount and the charge amount applying the confidence interval during one day were calculated.

As shown in FIG. 3, it can be seen that the average charge amount is somewhat higher than the charge amount to which the confidence interval is applied. When the average value is used, energy to be stored (charged) in the ESS 110 due to an external factor or the like becomes insufficient If a real-time electricity bill is applied, it will inevitably be forced to supply expensive electric bills at times of high demand.

4 is a diagram illustrating experimental results according to another embodiment of the present invention.

FIG. 4 is a graph comparing the results of one day consuming system power and energy stored (charged) in the ESS 110 according to an embodiment of the present invention, minimizing utility of grid power at times of high electricity bills .

5 is a diagram illustrating experimental results according to another embodiment of the present invention.

As shown in FIG. 5, a change in the real-time electricity rate for a day can be seen, and the conventional method of using the energy stored in the ESS preferentially and using the system power when the energy stored in the ESS is insufficient, Nevertheless, it can be seen that power is inevitably supplied through grid power.

However, it can be seen that the system according to the embodiment of the present invention minimizes the generation of electric charges by positively utilizing the grid electric power when the electric power of the grid electric power is low

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100: Energy Scheduling System
110: Energy storage device, 120: Energy information storage part
130: scheduling management unit, 140: device load control unit

Claims (5)

A method for estimating an inconvenience of a user due to a power supply delay when performing an energy scheduling in which an energy scheduling device supplies power to each power using device,
(a) acquiring a preferred operation time and an actual operation time of each of the power using devices;
(b) matching the preferred operation time and the actual operation time to a time slot; And
(c) estimating user discomfort of each of the power using devices based on a slot start point of the actual operation time with respect to the slot duration of the preferred operation time, a total slot number, and a weight based on the delay time in each slot
, ≪ / RTI &
The user discomfort of each of the power consuming devices is expressed by the following equation,
The step (c)
Overlapping with a slot period of the preferred operation time, the user discomfort is calculated as " 0 ", and the slot duration of the preferred operation time is non-overlapping Calculating a user discomfort level by dividing a sum of the slot of the actual operation time and the corresponding weight value by the actual operation time,
Wherein the weight according to the delay time in each slot is increased from a point where the slot duration of the preferred operation time and the actual operation time are non-overlapping.
[Mathematical Expression]

here,
T _a : the operating time of the power-using device a
α _a : preferred time interval (starting point)
β _a : preferred time interval (ending point) for power consuming device a
d _a : Delay time applied to power-using equipment a
w ^t _a is the number of timeslots for the operation of power-consuming device a that does not overlap with the preferred time interval in time slot t (non-overlapping)
U _a (d _a ): User inconvenience of the power consuming device a in which the delay time is reflected
delete delete delete An energy scheduling apparatus for estimating an inconvenience of a user due to a power supply delay in performing scheduling for supplying power to each power using device,
A power use device information input unit receiving the preferred operation time and the actual operation time of each of the power using devices; And
Wherein the preferred operation time and the actual operation time are matched to a time slot, and a weighting value according to a slot start point, a total number of slots, and a delay time in each slot of the actual operation time with respect to a slot section of the preferred operation time Based on the user's discomfort level,
, ≪ / RTI &
The user discomfort of each of the power consuming devices is expressed by the following equation,
Wherein the user-
Overlapping with a slot period of the preferred operation time, the user discomfort is calculated as " 0 ", and the slot duration of the preferred operation time is non-overlapping Calculating a user discomfort level by dividing a sum of the slot of the actual operation time and the corresponding weight value by the actual operation time,
Wherein the weight according to the delay time in each slot increases from a point where the slot duration of the preferred operation time and the actual operation time are non-overlapping.
[Mathematical Expression]

here,
T _a : the operating time of the power-using device a
α _a : preferred time interval (starting point)
β _a : preferred time interval (ending point) for power consuming device a
d _a : Delay time applied to power-using equipment a
w ^t _a is the number of timeslots for the operation of power-consuming device a that does not overlap with the preferred time interval in time slot t (non-overlapping)
U _a (d _a ): User inconvenience of the power consuming device a in which the delay time is reflected

Images