KR101821972B1 - a distributing board for embedded EMS - Google Patents

Abstract

The present invention relates to an EMS built-in power distribution board (switchboard, distribution board, MCC) for economical energy consumption and safety of electric equipment. When a user sets a target amount of power to be used for a month, The target power profile for one month is generated to notify the information on the reference use value for each day of the week and the reference use amount for each day of the week, By generating a reference model, it compares the output of the power consumption and the target reference model in real time to calculate the free capacity or excess capacity for the target value, and notifies the user of the target value. , And temperature diagnosis of each facility (switchboard, distribution board, MCC) All / partially limit the rated power over to an attempt can be made to the safety of electrical equipment.

Description

EMS built-in power distribution board {a distributing board for embedded EMS}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switchboard (switchboard, distribution board, MCC), and more particularly to an EMS built-in switchboard in which electric equipment is secured with economical energy consumption.

In recent years, energy has become a major issue both domestically and internationally, and demands for energy-saving systems are increasing. The switchboard is the most basic device to supply energy to the customer, but until now, the technology factor of the switchboard has focused on the stable supply of electricity.

Most switchboards basically measure electrical elements such as voltage, current, and power, and they simply use the function of measuring the measured value in real time or at a remote location.

Generally, the switchgear system consists of water front panel, switchboard, and distribution panel. The power devices consist of circuit breaker, transformer, MCCB, and protection devices. The power received from the power supply source is supplied to the MCCB through the breaker and the transformer, and power is supplied to the lower ends through the MCCB.

In such a switchboard, the conventional power meter is measured by a meter at the front end, which is intended only for billing of the power source, and the quality is measured by an electric quality device at the substation. This is a disadvantage that the power quality change due to the distance from each power demand side can not be measured and monitored.

On the other hand, a customer who requires an energy management system must separately install an EMS system, regardless of the power distribution system, and additionally install an instrument for energy management.

The first factor to save energy is to show users directly how much energy they are currently using. Users can save their energy by monitoring their current energy usage. However, in order to save energy in the switchboard, it is very difficult to apply the method of automatically shutting off the load in real life.

The present invention solves the above-mentioned problems, and it is possible to economically consume energy through energy consumption analysis, and it is also possible to perform temperature diagnosis for a facility such as a switchgear, a switchboard, a distribution board or an MCC, The present invention aims to provide an EMS built-in type power distribution board in which the capacity can be flexibly limited according to the temperature result so as to secure the safety of the electric facility.

In order to achieve the above object, an EMS built-in type switchgear according to the present invention includes a case for performing isolation and protection from the outside, a switchboard (switchboard, distribution board, and the like) having a base plate, Wherein the EMS includes a measuring and storing unit for measuring and storing power and cumulative accumulated power for each of the main circuit and the branching circuit, An interval power amount calculation unit that receives data of cumulative cumulative power amount measured in real time from the measurement and storage unit and calculates power amount data of the current time, the present day, and the present month, and a cumulative cumulative power amount data measured in real time from the measurement and storage unit Analyze and store the power usage pattern for each time zone by day of receipt A monthly pattern analysis unit, a monthly target power input unit for setting a target power usage amount to be used from the customer, and a target power usage amount calculation unit for calculating a target power usage amount based on the power usage pattern of the day- A target power profile storage unit for storing a target power amount to be used for each day and time zone generated from the daily target power profile generation unit; A target present model setting unit for setting a target power amount reference value for a given time out of the target power stored in the target power profile storage unit; Based on the target power amount reference value set in An output and display unit for outputting and displaying the amount of power usage judged by the target management judgment unit, and a temperature measuring unit for measuring the ambient temperature, the facility temperature and the external temperature of the switchboard, A deterioration diagnosis unit for comparing the ambient temperature, the facility temperature, and the external temperature of the switchgear measured by the temperature measurement unit and for diagnosing deterioration by analyzing the temperature rise trend and the comparison; A rated capacity limit calculation section for calculating a rated capacity limit calculated so as to limit the rated capacity in a profile storage section in a fluid manner; and a facility and a material database for storing the diagnosis results of the degradation diagnosis section.

The EMS built-in switchboard according to the embodiment of the present invention has the following effects.

First, if the user sets the target power to be used for one month, it analyzes the power use pattern of each day of the customer, generates a daily target power profile for one month, and obtains information about the used power per day Energy consumption can be reduced.

Second, if the daily date is changed, the target base model that outputs the reference power for an arbitrary time is generated, and the available capacity and the excess capacity are calculated for the target value by comparing the power consumption and the output of the target reference model in real time Thereby notifying the user of the abnormality, and notifying the user when an excess is expected, thereby reducing energy waste.

Third, it is possible to limit the rated capacity of the whole / part by the temperature result for any one of the switchgear, switchboard, and distribution panel MCC by fluidly limiting according to the temperature result, so that the safety of the electric equipment can be secured.

1 is a block diagram schematically showing an EMS built-in type switchboard according to the present invention;
Fig. 2 is a diagram showing the power usage data stored in the pattern analysis unit for each day in Fig. 1 in accordance with the calendar type
Fig. 3 is a diagram showing pattern data for each day of the week in the calendar form of Fig. 2
4 is a diagram showing the generated daily target amount of power
5 is a graph showing target cumulative pattern data for each day of the week

Hereinafter, the present invention will be described in detail with reference to the drawings. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

FIG. 1 is a schematic diagram showing an EMS built-in switchboard according to the present invention.

As shown in FIG. 1, the EMS built-in type switchgear according to the present invention includes an EMS mounted inside and detecting the amount of electric power used by a customer and inducing use of a target amount of electric power, (Switchgear, distribution board, MCC) having a disconnector, a power fuse, a lightning arrester, a capacitor for phase, and a breaker, which is connected to the source and supplies the main power from the main power source to the load, A measuring and storing unit 110 for measuring and storing power and cumulative accumulated power for each main circuit and branching circuit, and a controller 110 for receiving data of accumulated cumulative power measured in real time from the measuring and storing unit 110, (110) for receiving the cumulative cumulative amount of power measured in real time from the measuring and storing unit (110) A monthly pattern analysis unit 130 for analyzing and storing a power usage pattern for each time zone, a monthly target power input unit 140 for setting a target power usage amount to be used from a customer, A daily target power profile generator 150 for automatically generating a target value by day and time slot for use below the target power usage amount based on the power usage pattern and the target power usage amount input to the monthly target power input unit 140 A target power profile storage unit 160 for storing the target power amount to be used for each day and time zone generated from the daily target power profile generation unit 150, A target reference model setting unit 170 for setting a target power amount reference value with respect to time, A target management determination unit 180 that determines the amount of power used based on the accumulated power generated today and the target power amount reference value set in the today's target standard model setting unit 170; An output and display unit 190 for outputting and displaying the determined power usage amount, a temperature measurement unit 200 for measuring the ambient temperature, the facility temperature, and the external temperature of the switchgear, A deterioration diagnosis unit 210 for comparing the ambient temperature, the facility temperature, and the external temperature of the deterioration diagnosis unit 210 and analyzing the temperature rise trend to diagnose degradation; A rated capacity limit calculation unit 220 for outputting a rated capacity limit calculated so as to limit the rated capacity in a floating manner to the battery 160, And it comprises a material database 230.

Here, the temperature diagnosis result of the deterioration diagnosis unit 210 is transmitted to the output and display unit 190, and the degree of deterioration of each facility can be confirmed in real time.

The rated capacity limitation calculation unit 220 outputs the rated capacity limitation to the target power profile storage unit 160 in accordance with the deterioration diagnosis result of the deterioration diagnosis unit 210.

The cumulative cumulative power amount stored in the measurement and storage unit 110 indicates the cumulative cumulative power amount measured from the initial installation to the present time, and most general-purpose measuring instruments provide the cumulative power amount.

Also, the measuring instrument of the measuring and storing part 110 can read information by communication with a digital protection relay generally used in a high-voltage switchboard, or can use a dedicated measuring instrument.

 The interval power calculation unit 120 calculates a power amount data such as E_hour, E_day, and E_mon from the data measured in real time in the measurement and storage unit 110. [

Here, the current amount of electricity (E_day) means the amount of electric power used from 0:00 today to the current time, and the monthly electric power amount (E_mon) is the amount of electric power used from 0:00 on the first day of the month to the current date. This can be calculated from the accumulated cumulative power.

The cumulative cumulative power E_tot is data that continuously increases. The cumulative cumulative power at the time when the date changes or the month is changed is stored in the storage device, and the stored cumulative power is subtracted from the cumulative cumulative power, Calculate the amount of power.

E_mon, E_day, E_startour, E_startmon, E_startday, E_startour, and E_tot are the accumulated cumulative power measured at the time of calculation, and E_startmon, E_startday, The cumulative cumulative power amount stored at the time of the calculation at the time of the calculation, and the cumulative cumulative power amount stored at the time of 0 minutes and 0 seconds of the calculation time.

The day-by-day pattern analyzing unit 130 generates and stores a pattern for each time zone for each day of the week from the power usage data of the custody stored in the last month or more. This is because the consumption patterns of buildings generally show similar demand patterns on the same day of the week, so they generate patterns by day.

FIG. 2 is a diagram showing the power usage data stored in the pattern analysis unit for each day in FIG. 1 according to the calendar type.

As shown in FIG. 2, the left column is Sunday, and the right column is power use data of Saturday. From the above stored data, power usage pattern data is generated for each day as follows. The power usage pattern data for each day of the week is calculated by taking an average of the data of the same day and the same time in the data of the latest one month or more.

The pattern data for each day of the week can be made differently according to the storage interval, such as 5 minutes, 10 minutes, 15 minutes, 1 hour, etc. In the present invention, the pattern data is made every hour. For example, the leftmost Sunday (SUN) pattern below generates 24 pieces of data for 1 to 24 hour time zones, and the data of 1:00 is generated at each 1:00 of the above 9 days, 16 days, 23 days, and 30 days Lt; / RTI >

3 is a diagram showing pattern data for each day of the week in the calendar form of FIG.

As shown in FIG. 3, the pattern data for each day of the week can be expressed as E_pattern in 7 rows and 24 columns as follows. If stored data is in units of 15 minutes, it will be 7 rows and 96 columns, and in 10-minute units, it will be a matrix of 7 rows and 144 columns.

The monthly target power input unit 140 is a unit for setting a target usage amount that the user wants to use in the month, and may be input with the previous month standard power amount data. For example, if you used 100MWh for a month last month, you can enter 90MWh to save 10% of power this month, and you will see the data name as E_targetmon for explanation.

The daily target power profile generation unit 150 automatically generates a target value (reference value) for each time period every day for use below the target usage amount input by the user.

In simple terms, if the target power per month is divided by 28 (or 29), 30, 31, etc., the target value per day can be calculated. However, since the power pattern of the consumer is not considered at all, do. The present invention proposes a method of automatically generating a daily target value from a power usage pattern of a customer.

The daily power used for each day of the week is calculated from the pattern data for each day of the week expressed by Equation (2) using Equation (3).

Here, E_i is the amount of daily power of the i-th day of the week, and the numbers of 1 to 7 are displayed on Sunday, Monday, Tuesday, Wednesday, Friday and Saturday.

E_i denotes an average power amount per day used on average and is divided by a maximum value to calculate a normalized power amount per day.

Here, En_i is the normalized power amount of the i-th day of the week, E_i is the average used power amount of the i-th day of week, and Emax is the maximum value of the average used power amount per day.

Next, calculate the number of days n_i per day of the month to be managed as a goal. N_1 is the number of the Sunday of the month to be the target management, and n_7 is the number of the Saturday of the month to be the target management. For example, for October 2014, n_i = [4 4 5 5 5 4]. Sunday, Monday, Tuesday and Saturday are 4 days, and Wednesday, Thursday and Friday are 5 days, total 31 days.

When the user inputs the monthly target power E_targetmon, the following equation (5) must be satisfied.

Here, nTday denotes the normalized power consumption per day. The nTday can be calculated using Equation (6).

The power (Tday_i) to be used for each day to achieve the target power is calculated by Equation (7). This value is used as a daily target value for one month.

Here, Tday_i is the target use value of the i-th day of the week.

4 is a graph showing the generated daily target amount of power.

As shown in FIG. 4, the target value is set differently according to the day of the week. In addition to the daily target value, a profile for the target value in the time unit is also generated. This generates a cumulative generation amount of time unit pattern for each day of the week in order to calculate the excess amount and the margin amount.

This is calculated from the pattern data for each day of the formula (2). First, cumulative power pattern data (Cpattern) defined as in Equation (8) is generated. At this time, the value of each element is calculated by Equation (9).

Here, Ei, k is the data of column i, column j of Epattern.

A target accumulation pattern Tpattern for each day of the week represented by Equation (10) is generated from the accumulated power pattern data of Equation (8).

Here, the data of the i-th row and the j-th column of the target cumulative pattern data for each day of the week is obtained by the equation (11).

Finally, Tpattern is a set of data to be displayed for each day of the week, as shown in the second row of FIG.

The daily target power profile generator 150 generates Tday_i data and Tpattern data from the existing usage pattern by the above process and stores it in the target power profile storage unit 160. [

The present target power reference model generation unit 170 generates a model capable of calculating a target power amount reference value at a certain time. This is generated from the Tpattern data of Equation (10).

Since the Tpattern data has a reference value for each day of the week, the model is constructed so that the reference can be calculated for an arbitrary time. If the daily date is changed, the model is created according to the day of the day, and the model is created and stored in advance according to the implementation method. If the date is changed, the corresponding model can be called and used.

The model is defined as a third-order polynomial with time as input (12).

Here, the parameters a0, a1, a2, and a3 of the model are calculated by the least square method of Equation (13).

Where A = [a0 a1 a2 a3] T, and Y = [Ti, 1 Ti, 2 ... Ti, 24] T, and is the data of the i-th row of Tpattern. X is an input matrix having 24 rows and 4 columns of data defined by Equation (14).

The reference power model of Equation (12) is generated for each day when the date is changed, and the formula is converted into seconds in the day, and a reference value at that time is output. For example, the target reference value at time t = 14 * 3600 + 20 * 60 + 30 at 14:20:30 is obtained from equation (12).

The target management determining unit 180 calculates the difference between the accumulated power generation amount calculated in the interval power calculation unit 120 and the output of Equation (12) and the difference from the reference value. If the accumulated power generation amount is greater than the reference value, the target value is exceeded. If the accumulated power generation amount is less than the target value, it means that there is more margin than the target value, and such information can be displayed on the screen of the output and display unit 190.

In addition, we have created a target baseline model by day, but we can extend the above method to create a baseline model per month and manage the target power.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, As shown in FIG. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.

100: EMS 110: Measurement and storage unit
120: interval power calculation unit 130: pattern analysis unit for each day of the week
140: Monthly target power input unit 150: Daily target power profile generation unit
160: Target power profile storage unit 170: Today's target reference model generation unit
180: target management decision unit 190: output and display unit
200: Temperature measuring unit 210: Rated capacity limitation calculating unit
220: deterioration diagnosis section 230: facility and material database

Claims (8)

(Power distribution board, distribution board, MCC) having a case for performing a role of isolating and protecting the outside from the outside, and a base plate in which various components are actually mounted in the case, EMS to detect and induce the use of target amount of power
A measuring and storing unit for measuring and storing power and accumulated accumulated power for each main circuit and branching circuit,
An interval power calculation unit that receives data of cumulative cumulative power measured in real time from the measurement and storage unit and calculates power amount data of the current time,
A pattern analyzer for each day of the week receiving data of cumulative cumulative power measured in real time from the measuring and storing unit and analyzing and storing the power use pattern for each time of day according to the day of the week,
A monthly target power input unit for setting a target power usage amount to be used from a customer,
A daily target power profile generator for automatically generating a target value by day and time zone for use below a target power usage amount based on the power usage pattern of the day-to-day pattern analysis unit and the target power usage amount input to the monthly target power input unit;
A target power profile storage unit for storing a target power amount to be used for each day and time zone generated from the daily target power profile generation unit;
A present-day-target-model setting unit that sets a target power-amount reference value for an arbitrary time out of the target electric power stored in the target-power-profile storage unit;
A target management determiner for determining an amount of power used based on the cumulative generation amount calculated in the interval power calculation unit and the target power amount reference value set in the present day reference model setting unit;
An output and display unit for outputting and displaying the power usage amount determined by the target management determination unit,
A temperature measuring unit for measuring the ambient temperature, the facility temperature, and the external temperature of the switchboard,
A degradation diagnosis unit for comparing the ambient temperature, the facility temperature, and the external temperature of the switchgear measured by the temperature measurement unit and for diagnosing deterioration by analyzing the temperature rise trend,
A rated capacity limit calculation unit for outputting a rated capacity limit calculated to limit the rated capacity in the target power profile storage unit in accordance with a temperature diagnosis result of the deterioration diagnosis unit;
And an equipment and a material database for storing diagnostic results of the degradation diagnosis unit. 2. The EMS switchboard according to claim 1, wherein the cumulative cumulative power amount is an accumulated cumulative power amount measured from the initial installation to the present. The EMS-equipped switchboard according to claim 1, wherein the power usage pattern data for each day is calculated by collecting data averages of the same day and time in the power usage data used in the customer for one month or more. The EMS-equipped switchboard according to claim 1, wherein the daily target power profile generator automatically generates a daily target value from a power usage pattern of a customer. 2. The EMS switchboard according to claim 1, wherein the target management determining unit determines that the accumulated power generation amount is greater than the reference power generation amount, and determines that the accumulated power generation amount is smaller than the target power generation amount. The EMS-equipped switchboard according to claim 5, wherein the output and display unit displays the results of the accumulated power generation amount and the standard power generation amount, which are determined from the target management determination unit, on a screen. The EMS-equipped switchboard according to claim 1, wherein the temperature diagnosis result of the degradation diagnosis unit is transmitted to the output and display unit to check the deterioration degree of the switchgear in real time. 2. The EMS-equipped switchboard according to claim 1, wherein the rated capacity limitation calculation unit flexibly outputs the rated capacity limit by the whole or part according to the deterioration diagnosis result of the deterioration diagnosis unit.

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