KR20120024318A - Apparatus and method thereof for controlling electrical loads based on critical-peak pricing - Google Patents

Abstract

PURPOSE: A demand charges control apparatus based on time-varying peak rates and method thereof are provided to control a control target load based on peak billing information by receiving the peak billing information from a power company. CONSTITUTION: A demand charge detection unit(110) detects current demand charges. A peak billing information reception unit(120) receives peak billing information. A control processing unit(140) detects target charge by using the received peak billing information. The control processing unit controls loads in order to reduce from the current demand charge to the target charge.

Description

Apparatus and Method about for controlling electrical loads based on Critical-Peak Pricing}

The present invention relates to a demand power control device and method for controlling the power demand used in the electricity use equipment of the consumer who uses electricity.

The demand power is the average value of the power consumption used for a certain time, and the maximum demand power is the largest demand power value of the month. The customer can adjust the current demand power by temporarily turning off or turning on the load, thereby controlling the maximum demand power, which is ultimately the billing standard for electricity consumption. A device that automatically performs the function is called a demand controller, and the device controls the maximum demand power by controlling the current demand power so that the target power set by the user is not exceeded.

As the demand power control method (apparatus) according to the related art, two kinds can be introduced. The first demand power control method (demand power control device) divides all days into holidays and weekdays, and does not execute demand power control (load control) on holidays and uses a single target power only on weekdays. To control power demand (load control).

The second demand power control method (demand power control device) divides all days into holidays and weekdays, and performs demand control (load control) on both holidays and weekdays, but demands only one target power on holidays. It is a method of controlling demand by applying the same target power for each of the 2-3 time zones on weekdays without weekday classification.

1 is a block diagram of a conventional power demand controller. 2 is a conceptual diagram of target power of a conventional power demand controller.

As shown in FIG. 1, the conventional power demand controller 1 receives a power pulse WP and a demand time pulse EIO every predetermined time interval (15 minutes) from an external device (measurement meter) 2 that measures power. Consists of.

In addition, as shown in FIG. 2, the power company announces the electricity price for each time zone in advance (about a year ago), and sets the power price lower in the time when the load is low and the power price in the time when the load is heavy. Highly priced. The device user inputs the target power into the demand power control device in advance as shown in FIG. 2 according to the power price known from the power company.

The conventional power demand control device receives the power amount pulse and the demand time pulse from the external device 2 for measuring the power amount as shown in FIG. 1, and calculates the current power demand using the constant power amount pulse and the demand time pulse. The load 3 connected to the demand power control device 1 is controlled so that the calculated current demand power does not exceed a preset target power as shown in FIG. 2.

In other words, the conventional demand power control apparatus and method targets the control criteria according to the power price for each time zone previously known by the user based on the power time for each time zone known in advance (about 1 year ago) from the power company. When the power is set and the determined target power is input to the demand power control device, the demand power control device controls the demand power based on the previously input target power.

Conventional demand power control method and apparatus can be used when the power price is set in advance (generally one year ago) for each time period, but in the peak rate system where the power price is determined one day or the day before, the target power can be properly controlled. The disadvantage is that it can't be.

In the critical peak pricing (CPP) system, which is a time-varying electric power pricing system, a charge section (critical peak section) to which a very high power price is applied is notified one day before or on the same day. It cannot be controlled properly. This means that the device user must pay a very high power bill for the demanded power and the amount of power used during the critical peak section. The above disadvantage is that the conventional apparatus does not operate according to the peak plan for which the peak plan application date is determined one day or the day before, and controls the load to be controlled according to the target power set by the user in advance.

In other words, the conventional demand power control method and apparatus can be used when the power price is determined in advance by the time zone, but can be used if known, but in the rate system that the power price is determined a day before or on the day, the target power cannot be properly controlled. Have.

In the critical peak pricing (CPP) system, which is a time-varying power pricing system, a peak fare section for which a very high power price is applied is notified one day before or on the same day, and the conventional demand power controller is based on a target power input in advance. Since the demand power is controlled, the demand power cannot be properly controlled in the peak rate section where the power price is very high, which means that the power consumer must pay a very high rate for the demand power and the amount of power used during the peak rate period. Therefore, it implies that the function of the demand power control device is not effectively achieved.

An object of the present invention is to provide a method and a device for more effectively controlling the power demand by improving the conventional device as described above, for this purpose, receiving peak charge information from the power company, and based on the peak charge information An apparatus and method for controlling a load to be controlled connected to a power device are provided.

The present invention is a demand power detection unit for detecting the current demand power; A peak rate information receiving unit which receives peak rate information; The present invention provides a demand-power control apparatus based on a time-varying peak tariff including a control processor configured to detect a target power by using the received peak rate information and control a load to be controlled so that the current demand power is equal to or less than the target power.

Herein, the control processor determines whether the current date corresponds to the peak plan application date, and if the current date corresponds to the peak fee application date, determines whether the current time corresponds to a threshold peak period, and if the corresponding peak period applies, the threshold peak. The target power is determined as the target power to detect the target power.

The control processor detects the target power by setting a set target power as the target power if it does not correspond to the peak fee application date or the threshold peak period.

In this case, the peak rate information includes at least one of a peak price applied date, a start time, an end time, and a power price of a critical peak period to which a higher power price than a reference value is applied among the peak rate applied date.

In addition, the demand power detection unit detects the current demand power by using the power amount pulse and the demand time pulse transmitted from the external power meter.

In addition, the demand power detector detects the current demand power using voltage and current signals of the demand power control device based on the time varying peak rate plan.

In addition, the present invention includes a display unit for displaying the received peak rate information to guide the user.

On the other hand, calculating the current date and time information; Determining whether the calculated date information corresponds to a peak plan application date; Determining whether the calculated time information corresponds to a critical peak period when the peak fee is applied; In the case of the threshold peak period, the method provides a method of controlling the target power using the demand-power control device based on the time-varying peak tariff including determining a threshold peak target power as a reference target power for control.

In this case, if it does not correspond to the peak charge application date or the threshold peak period, determining a set target power as the reference target power.

As described above, according to the demand-power control device and the method based on the time-varying peak plan according to an embodiment of the present invention, the conventional demand-power control method and device can not control the demand power in accordance with the peak plan to improve the disadvantage That is, the peak charge information is received from the power rate management server one day before or on the day, calculates the control reference target power (critical peak section target power) based on the peak rate information, and demands during the critical peak section. By controlling the load to be controlled so that the power does not exceed the target power, the demand power and the amount of power can be effectively controlled.

1 is a block diagram of a conventional power demand control device.
2 is a target power conceptual diagram of a conventional power demand controller.
3 is a conceptual diagram of a method and an apparatus for controlling power demand according to an embodiment of the present invention.
4 is a functional block diagram of a demand power control apparatus according to an embodiment of the present invention.
5 is a graph showing an example of the price plan electricity price structure.
6 is a graph showing a target power of the present invention.
7A is a flowchart for determining control reference target power based on a peak plan;
7B is a graph showing an example of the control reference target power according to the peak rate plan.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention. do.

The power demand controller receives the power pulse and the demand time pulse from an external device (measurement meter) that measures the power consumption of the consumer, calculates the power demand using the power pulse and the demand time pulse, and calculates the demand power. In order to maintain below a predetermined demand power (target power), the device controls a load to be controlled connected to the demand power device.

The present invention relates to a consumer during a date / time (critical peak period) to which a very high power rate (critical peak price) is applied in a critical peak pricing (CPP), a time-varying power rate system. In order to minimize the amount of power demanded and the amount of power used in the power plant, the power load is normally controlled based on the usual target power (i.e. when the current date and time are not the date and time of the application of the threshold peak rate). In the critical peak section (that is, the current date / time is the date / time to which the threshold peak rate applies), the target power in the critical peak section, not the usual target power, is notified from the utility company one day or the same day. The apparatus for controlling (blocking / injecting) a load to be controlled by the customer so that the current demand power does not exceed the target power of the threshold period and its It relates to the law.

Peak rate information, including the peak rate application date in the peak rate plan (CPP), is different from the conventional rate plan in which the hourly rate rate is announced in advance (usually one year ago). The main feature is that the company is notified and notified to the customer.

3 is a conceptual diagram of a method and an apparatus for controlling power demand according to an embodiment of the present invention. 5 is a graph showing an example of the price plan electricity price structure. 6 is a graph showing the target power of the present invention. 7A is a flowchart of determining control reference target power based on a peak rate plan. 7B is a graph showing an example of the control reference target power according to the peak rate plan.

3 is a diagram illustrating an overall system configuration of a method and apparatus for controlling demand power based on a peak tariff. The demand power control device of the present invention is a demand time pulse from the device for measuring the amount of power (watt-hour meter) every power pulse (WP) and a predetermined time interval (1 minute, 5 minutes, 15 minutes, 20 minutes, 30 minutes, 60 minutes) (EOI) is received, and the peak rate plan-related information is received through a wired or wireless network from a power rate management center operated by a power company or an electric company.

4 is a functional block diagram of a demand power control apparatus based on a time varying peak rate plan according to an embodiment of the present invention. 4 shows the apparatus of the present invention functionally.

As shown in FIG. 4, a demand power control apparatus based on a time-varying peak rate system according to an embodiment of the present invention includes a demand power detector 110, a peak rate information receiver 120, a display unit 130, a control processor 140, and a load controller. And a storage unit 160 and a clock element 170.

The demand power detector 110 receives the power amount pulse and the demand time pulse from the external power meter 10, and calculates the current demand power using the power amount pulse and the demand time pulse.

The peak rate information receiving unit 120 receives peak rate information that is notified or notified from the power rate management server 30, and the display unit 130 functions to display the peak rate information for the user to view.

The control processor 140 controls the current demand power to be less than or equal to the target power based on the demand power detected by the demand power detector 120 and the peak fee information. That is, when the current date / time is not the date / time to which the peak rate is applied, the control processor 140 controls the power usage load based on the usual target power, and when the current date / time is the critical peak period, The power usage load is controlled based on the target target of the critical peak section.

The load control unit 150 performs a function of turning off or turning on the control target loads 40a to 40n by actually applying the load control state value (ON or OFF) calculated by the control processing unit 140. do. In addition, the load controller 150 includes a switch or a contact that may actually turn off or return the load 40 to the inside of the apparatus.

The storage unit 160 records a program (demand time, target power, etc.) required for the demand power control, the received peak rate information and the maximum demand power, power consumption, and the like, and the clock element 170 is the current date / time. Has information.

Next, the operation principle of the present invention will be described with reference to FIGS. 3 and 4.

Firstly, the peak rate information is received by the apparatus of the present invention at the peak rate information receiving unit 120 and displayed on the display unit 130, and is directly received by the communication device of the peak rate information receiving unit 120. After the device user receives the peak rate information from the power rate management server 30, there is a method of inputting it through a manual operation device in the device.

When the peak rate information receiver 120 receives peak rate information, the peak rate information receiver 120 receives the peak rate information through a wired or wireless network. As a communication method, a power line carrier (PLC) and a radio frequency (RF) are used. ), Dedicated line communication is used.

When the device user directly receives the peak rate information, the same peak rate information transmitted to the apparatus of the present invention is transmitted from the power rate management server 30 to the user 20, and is connected to a landline phone or a mobile phone (SMS, text service). Communication means such as a portable pager, a fax machine, and the like, and when the peak rate information cannot be received through the communication network for any reason (communication / failure of the communication network), the user may receive the peak rate information receiver. The peak rate information is input through the manual manipulation apparatus of the 120 and the display unit 130.

In addition, the utility company or the electric service provider can notify the user of the device and the related party of the peak rate information by notifying the peak rate information on the website of the power rate management server 30.

The peak rate information shown in FIG. 3 includes peak rate event information, peak rate application date / start time / end time, power price of critical peak intervals, and the like. Can be used. As an example, when a customer using electricity and a power company have previously agreed on a start time, an end time, a power price, and the like of a critical peak section, event information and an application date of a peak rate plan may be used as the peak rate information. In general, the peak tariff is issued by a power company or an electric company during the summer when the amount of power usage is large, and the frequency of occurrence of the peak tariff is about 12 times or less on a yearly basis.

The control processor 140 of FIG. 4 records the peak rate information notified one day or the day in the storage unit 160, and target power (hereinafter, referred to as a critical peak) in the critical peak section based on the power price of the critical peak section. Section target power), and basically calculates the critical peak section target power in inverse proportion to the power price of the critical peak section.

5 shows the power price structure of the peak rate plan, and it can be seen that the power price in the critical peak section of the date when the peak rate plan is applied is very high compared to the normal power price (hourly rate plan).

FIG. 6 illustrates a target power structure of the present invention, in which the peak critical section target power is inversely proportional to the power price, and is designed to have a very low target power compared to the normal target power. In FIG. 5 and FIG. 6, the peak plan having one critical peak section is illustrated. However, since the number of critical peak sections is determined according to the peak plan operating policy (generally one or two), the present invention is applied to the peak plan in the present invention. It is based on designing a variable structure that can have one or more critical peak sections and is designed to handle at least two critical peak sections.

FIG. 7A illustrates a process of determining a target power as a reference for controlling a load in a peak rate plan, and calculates current date and time information (S100).

It is determined whether the calculated date information corresponds to the peak plan application date (S110). If the calculated date information corresponds to the peak plan application date (YES in step 110), the calculated time information in step 100 is critical. It is determined whether it corresponds to the peak period (S120).

If it corresponds to the threshold peak period in step 120, the threshold critical target power is determined as the reference target power for control (S130).

Meanwhile, in step 110 and 120, if the peak fee is not applied or does not correspond to the threshold peak period, the set target power is determined as the reference target power (S140).

7B illustrates an example of the control target reference power. As an example, 1) if the current date / time is '2 days-15: 30', the normal target power 'TP-2: target power-2' becomes the control reference power, while 2) the current If the date / time is 'Peak Rate Application Day-15: 30', the peak rate target power, 'TP-C1: Critical Peak Area Target Power-1', becomes the control reference target power.

Since the present invention provides a method and apparatus capable of actively responding to a critical peak pricing (CPP), power consumers can more efficiently use electric energy even in areas where the peak pricing is applied. This effect can be obtained by improving the disadvantage that the conventional demand power control method and apparatus cannot control the demand power in response to the peak rate plan, which is the day before or the day from the power rate management server 30 as shown in FIG. Receive the peak rate information, calculate the target power (critical peak section target power) of the critical peak section based on the peak rate information, and control the demand power during the critical peak section not to exceed the threshold peak section target power. This is achieved because the target load 40 is controlled.

The effect of the present invention is that the peak charge information receiving unit 120 shown in FIG. 4 receives the peak charge information, based on the peak charge information to determine the control reference target power by the method of FIG. 40 is achieved by substantially controlling through the load control unit 150 of FIG.

Hereinafter, various application situations of the present invention will be described. First, the present invention can be equally used in a Peak Time Rebate (PTR). The present invention relates to a method and apparatus for controlling demand power in a peak rate system (CPP), which is a power rate system, and receives peak rate information from a power rate management server 30 based on the peak rate information. The target load 40 is controlled in the critical peak period to which the price is applied.

In the present invention, the demand for electricity in the critical peak period, which is set to a very high power price due to the rapid increase in the use of electric energy, is controlled to be below a predetermined value (target power), but the electric power bill system refunds the electric power fee to the customer. The same applies to the present invention in the PTR (Peak Time Rebate), a power rate system that refunds the power rate for the reduced amount of electricity when the use of electricity is reduced below a certain value during the time when the use of electric energy is rapidly increasing. Can be utilized. That is, by using the present invention, the user of the device can receive the peak refund information from the power bill management center and set the control reference target power less in the section (peak refund section) where the power bill can be refunded (peak refund section). Power and power demand can be controlled effectively.

Looking at the description of the present invention, the present invention is a consumer's power usage load during the date / time (CPP section) when a very high power rate is applied in the power price pricing system that applies a critical peak pricing (CPP) In order to minimize the demand power and the amount of power used in the facility, the control target load of the consumer is controlled so that the current demand power is maintained below the target power set by the consumer, not the usual target power during the CPP section. The present invention relates to an apparatus and a method for controlling a load to be controlled based on a usual target power when the CPP section is not input.

The present invention provides a method for minimizing demand power and power consumption used by a load of a consumer during a date / time (CPP section) in which a very high power rate is applied to a consumer using a critical peak pricing (CPP). During the CPP section, the control target load is controlled (blocked / input) so that the current demand power is maintained below the target power of the CPP section, not the general target power.

The present invention relates to the demand used in a consumer's power facility during a date / time (peak rate period) when a very high power rate is applied in a time-varying power rate price system applying a critical peak pricing (CPP). In order to minimize power and amount of electricity, the utility load is controlled based on the general target power at normal times (i.e., if the current date / time is not the date and time of the peak rate), In the peak rate application period (that is, when the current date / time is the date / time when the peak rate applies), the target power in the peak rate period set by the consumer (hereinafter, the target power in the following section) Based on the above, it is characterized in that the control target load of the consumer is controlled (blocking / injecting) so that the current demand power does not exceed the target power of the peak section.

Although the present invention has been described in detail with reference to exemplary embodiments above, those skilled in the art to which the present invention pertains can make various modifications to the above-described embodiments without departing from the scope of the present invention. Will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims, as well as the appended claims.

Claims (9)

A demand power detector for detecting current demand power;
A peak rate information receiving unit which receives peak rate information;
And a control processor configured to detect a target power by using the received peak rate information, and control a load to be controlled so that the current demand power is equal to or less than the target power.
The method of claim 1,
The control processing unit,
Determine whether the current date corresponds to the peak plan application date, and if the current date corresponds to the peak plan application date, determine whether the current time corresponds to a threshold peak interval,
And a power consumption control apparatus based on a time-varying peak rate plan that detects the target power by determining a threshold peak target power as the target power when the threshold peak period corresponds.
The method of claim 2,
The control processing unit,
The power demand control device based on the time-varying peak tariff to determine the target power by setting a set target power as the target power, if it does not correspond to the peak charge application date or the threshold peak period.
The method of claim 1,
The peak rate information,
A demand-power control device based on a time-varying peak plan that includes at least one of a peak plan application date, a start time, an end time, and a power price of a critical peak section to which a power price higher than a reference value is applied among the peak plan application dates.
The method of claim 1,
The demand power detector,
A demand-power control device based on a time-varying peak rate system that detects the current demand power by using a power amount pulse and a demand time pulse transmitted from an external power meter.
The method of claim 1,
The demand power detector,
A demand-power control device based on a time-varying peak plan that detects current demand power using voltage and current signals of the demand-driven control device based on the time-varying peak rate plan.
The method of claim 1,
And a display unit for displaying the received peak price information to guide the user.
Calculating current date and time information;
Determining whether the calculated date information corresponds to a peak plan application date;
Determining whether the calculated time information corresponds to a critical peak period when the peak fee is applied;
The target power is controlled by using the demand-power control device based on the time-varying peak tariff comprising the step of determining the threshold peak target power as a reference target power for control if the threshold peak period.
The method of claim 8,
If it does not correspond to the peak charge application date or the threshold peak period, the method of controlling the target power using the demand-power control device based on the time-varying peak rate comprising the step of determining a set target power as the reference target power.

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