KR20040003357A - System for monitoring/controlling a maximum demand electric power - Google Patents

Abstract

PURPOSE: A system for controlling and monitoring maximum demand power is provided to integrate total power factor control functions of transformers and loads by forming stably the module environment. CONSTITUTION: A system for controlling and monitoring maximum demand power includes a MOF(Metering Out-Fit)(210), a DM(Demand Meter)(220), a maximum demand power monitoring block(300), and a switch(230). The MOF(210) includes a single circuit block having a power transformer and a current transformer in order to transform the power and transmit the transformed power to a plurality of transformers(240). The DM(220) is electrically connected to the MOF(210) in order to display the consumed amount of the power and output synchronous signals including the power information, the voltage information, the current information, the power amount information, the transformer information, and the load information. The maximum demand power monitoring block(300) is electrically connected to the DM(220) in order to detect the synchronous signals, calculate power factors of the transformers(240), and display the calculated results. The switch(230) is electrically connected to a plurality of loads, the transformers(240), and the maximum demand power monitoring block(300) in order to transmit selectively the power to the loads.

Description

System for monitoring / controlling a maximum demand electric power}

The present invention relates to a maximum demand power supervisory control system, and more specifically, a series of high voltage synchronization signals output from a maximum demand power meter (DM) is referred to as "maximum demand power of loads." A stable module environment that can be newly utilized for the purpose of "monitoring control", "power related information display", "power factor adjustment of transformers", "power factor adjustment of loads", and the like, and thus, conventional "maximum demand power monitoring control" Mechanism "," power related information display mechanism "," power factor adjustment mechanism ", etc. can be newly improved to" type using high-voltage synchronization signal output from the DM ", so that in the system," monitoring the maximum demand power of the load In order to reliably remove the instrument transformer (PT: Power Transformer) and the CT (Current Transformer), which contribute to the control, In addition, the present invention relates to a maximum power demand supervisory control system that can induce "total power factor adjustment of transformers" and "total power factor adjustment of loads" to be integrated into a single module in a block. will be.

Normally, the maximum demand power monitoring and control system is installed in a power receiving room of a factory, a building, etc. to monitor the power usage of various loads attached to the building at all times, and to set the power usage of each load in advance for each time zone. Compared with the target value, when the corresponding power consumption is expected to exceed the target power, the unattended automatic on / off of certain loads that can be temporarily stopped, for example, "chiller, pump, air conditioner, lighting, ..." By turning on (Off), it refers to a system that provides power consumers with the effects of "suppressing demand of maximum power", "efficient use of electric power", "reduction of electric bill", "overload control" and the like.

As shown in FIG. 1, the maximum demand power monitoring and control system 100 according to the related art is largely divided into an instrument transformer 10 (MOF: Metering Out-Fit (hereinafter referred to as MOF)) DM 20. ), The time limit power meter 30, the maximum demand power monitoring control block 40, and the like.

At this time, the MOF 10 is through the PT, CT, etc. disposed in the high-voltage power processing block so that the previous DM 20 can stably integrate the amount of power (P) supplied from the outside, the corresponding power (P) The transformer 20 transforms and converts the current into a predetermined voltage / current, and the DM 20 is electrically connected to the MOF 10, and after the power supply from the outside is received, a predetermined specific demand time period, for example, 15 It calculates the amount of power used by each load 2 in minutes and displays it through an indicator (not shown). Since the DM 20 is normally sealed and managed by a national power management agency (for example, KEPCO), it cannot be opened arbitrarily without the approval of the agency.

In addition, the time-of-demand power meter 30 checks the power via the preceding MOF 10 and checks the " average used by the respective loads 2 within a predetermined specific time-limit, eg 15 minutes. It generates a pulse signal corresponding to the "power value", and delivers the generated pulse signal to the maximum demand power monitoring control block 40, the maximum demand power monitoring control block 40 is The pulse signal output from the power meter 30 is detected to determine the "average amount of power used by each of the loads 2 within a specific demand time limit." If it is expected to exceed, by controlling the cutoff switch 50, serves to automatically turn off certain loads that can be temporarily suspended. In this case, the power user may advance the computerized operation using the keyboard 1 to set a desired target power value in advance in the maximum demand power monitoring control block 40.

According to the linking operation of the time-demand power meter 30 and the maximum demand power monitoring control block 40, the power consumer is "suppressing the demand of the maximum power", "efficient use of power", "reduction of electricity bills", " "Overload suppression" can be easily enjoyed.

In addition, the maximum demand power monitoring control block 40 detects a pulse signal output from the above-mentioned time-demand power measuring system and performs a series of power related information, for example, "voltage information, current information, power information ..." and the like. And it displays the outside, and according to the action of the maximum demand power supervisory control block, power consumers can easily grasp the current power-related information.

On the other hand, as shown in the figure, the power output from the preceding MOF is delivered to the on-demand power meter via a number of transformers and low voltage power processing blocks.

In this case, each transformer transforms the high voltage power output from the MOF into low voltage power, and transfers the high voltage power to the low voltage power processing block belonging to the transformer. Through the PT (14a), CT (14b), and the like, the voltage / current of the dedicated to the voltage / current that can be handled by the time-measured power meter 30 again transforms / flows.

Under such a conventional maximum demand power supervisory control system, as mentioned above, the maximum demand power supervisory control block 40 connects the MOF 10 through the transformers 60 and the low voltage power processing blocks 14. After the power P has been transformed / flowed at a predetermined low pressure, a series of "load automatic on / off control process and power related information display process" is performed. Block PTs, CTs, etc. must be indispensable in the system. ”

However, for example, as disclosed in Korean Patent Laid-Open Publication No. 2001-96286 "Transforming Transformers and Current Transformers for Power Supply and Demand Instrument", since PT, CT, etc. are usually very large, if the system is PT, In addition to the CT, when the PT and CT for the low-voltage power processing block must be additionally retained, the housing (not shown) accommodating the maximum demand power monitoring and control system 100 is proportional to the increase in the number of the PT and CT. Inevitably, the size of the power user increases, and thus, the power user has to deal with the inconvenience of having to devise a separate large space for deploying the "maximum demand power supervisory control system 100" to a self-power reception site, for example, a factory or a building. There is no choice but to take it.

Moreover, when the number of PTs and CTs increases, the "total weight of the enclosure" and "cost of the system" also have to increase in proportion to the increase in the number of PTs and CTs. The user is forced to additionally have a great difficulty in installing and managing the maximum demand power monitoring and control system 100.

On the other hand, in order to efficiently perform the normal function of the conventional maximum demand power monitoring and control system 100 described above, a series of power factor adjustment processes must be performed. In this case, since the reactive power is inevitably increased, the corresponding power user is forced to take the damage that the "efficient use of power" becomes impossible.

In the conventional case, in order to prevent such damage, the electric power user is made up of, for example, "transformer 60-low voltage power processing block 14-maximum demand power monitoring control block 40" and the like as shown in the figure. A plurality of power factor adjusting units 70 are disposed in a part of the series of power movement paths, and the power factor adjusting units 70 are used to minimize generation of reactive power.

In this case, each power factor control unit 70 is electrically connected to the bank of each transformer 60, based on the power output from the transformer 60, the respective loads belonging to the self-contained transformer 60 ( If the power factor of 2) is calculated and it is determined that the power factor of the loads 2 is less than or equal to a predetermined reference power factor, the magnetic switch 80 is used to load the loads 2 with a specific power factor correcting capacitor. By taking the procedure of electrical connection with 90, the power factor drop of the loads 2 is suppressed.

However, under this conventional regime, since each power factor control unit 70 is in the form belonging to each transformer 60, as described above, each power factor control unit 70 is each transformer 60 In order to normally adjust the power factor of the loads 2 belonging to the number, the number must be increased in proportion to the number of the transformers 60, and eventually, under the conventional system, the power user monitors the maximum demand power. In installing and managing the control system 100, there is no choice but to suffer further.

In addition, since each power factor control unit 70 performs a series of power factor calculation process based on the power that has already passed through the transformer 60, under the conventional system, each power factor control unit 70 is merely a respective transformers. Only the power factor of the loads belonging to (60) can be calculated, the power factor of the transformer 60 itself cannot be calculated, and as a result, the power user can change the power factor of the transformer 60 unless a separate action is taken. Cannot be managed normally.

Furthermore, since each power factor control unit 70 performs a series of power factor calculation processes based on the low voltage power passing through the transformer 60, the power factor control accuracy of the series is greatly reduced as compared with the case of high pressure. As a result, under the conventional system, power users are forced to take the inconvenience of taking extra measures to improve the power factor control accuracy.

In short, under the conventional maximum demand power supervisory control system 100 system, unless a separate action is taken, the power user is accompanied by "space allocation problem", "installation and management problem", etc. according to the increase in the number of PT and CT. Inevitably, the "system management problem", "transformer power factor control problem", and "power factor control accuracy improvement problem" according to the transformer 60 subordinate installation of the power factor control module will be forced to bear it.

Accordingly, an object of the present invention is to transmit a series of high voltage synchronization signals output from the DM to a part of the maximum demand power monitoring control block, "maximum demand power monitoring control of the load", "power related information display", "power factor adjustment of the transformer", By establishing a stable module environment that can be newly utilized for the purpose of "loading power factor adjustment", the conventional "maximum demand power monitoring control mechanism", "power related information display mechanism", and "power factor adjustment mechanism" In addition, the present invention can be improved to the form of using a high-speed synchronous signal output from the DM, so that the PT and CT contributing to the maximum demand power monitoring control of the load can be stably removed in the system. , "Total power factor control of transformers", "total power factor control of loads", etc. to be integrated into a single module in the block There.

Another object of the present invention is "stable elimination of PT, CT contributing to the maximum demand power monitoring of the load" and "integration in the block of the power factor adjustment function", etc., "spatial space problem in accordance with the increase in the number of PT, CT "," Installation and management problem "and" system management problem "," transformer power factor control problem ", and" power factor control accuracy improvement problem "according to the transformer-dependent installation of the power factor control module are to be easily solved.

Still other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

1 is a block diagram conceptually illustrating a maximum demand power monitoring control system according to the prior art;

2 is a block diagram conceptually illustrating a maximum demand power monitoring control system according to the present invention;

In order to achieve the above object, in the present invention, a series of PT and CT are provided in a single circuit block, and MOF (Metering) is supplied to a transformer by transforming / converting the power supplied from the outside to the power station through PT and CT. Out-Fit), which is electrically connected to the previous MOF, accumulates the amount of power used by each load within the preset time limit and displays it to the outside. DM, which outputs a series of synchronizing signals including "information", "information on voltage supplied to loads, information on current, information on power", and "information on transformers and the amount of effective power of loads". It is electrically connected to the previous DM, and detects the synchronization signal output from the DM to determine the amount of power used by each load within the demand time limit. If it is expected to exceed the target power, the power factor of the loads is selectively based on information on the effective power amount of the loads included in the synchronization signal. If it is determined that the total power factor of the loads is below the preset reference power factor, the loads are electrically connected to a specific power factor correction capacitor to suppress the power factor drop of the loads, and the transformer contained in the synchronization signal. Based on the information on the amount of effective power of the electric power, the maximum demand power monitoring control block that calculates the power factor of the transformers and displays the result of the power factor calculation to the outside, and the preceding loads, the transformer and the maximum demand power monitoring control block and the electrical Connected to the power supply, and turned on and off under the control of the maximum demand power supervisory control block. It discloses a maximum demand monitor control system consisting of the output power that is a combination of the cut-off switch for selecting, delivered to the load.

Hereinafter, with reference to the accompanying drawings, the maximum demand power monitoring control system according to the present invention in more detail.

As shown in FIG. 2, the maximum demand power monitoring control system 200 according to the present invention is largely composed of a combination of the MOF 210, the DM 220, and the maximum demand power monitoring control block 300.

At this time, the MOF 210 has a series of PTs 211 and CTs 212 in a single circuit block, and the PTs 211 and CTs 212 transmit power P supplied from the outside to the power station. Through the transformer / current transformer, and output the transformed / current (P) to, for example, "transformer 240 side", "DM 220 side" and the like, the "power transformer 240 is supplied from the outside ( Lowering the voltage of P) to induce selection and transfer to each of the loads 2 "," inducing the DM 220 to stably integrate the amount of power P supplied from the outside. And so on.

In addition, while the DM 220 is electrically connected to the MOF 210, the DM 220 accumulates the amount of power used by the loads 2 within a preset demand time period, for example, 15 minutes, and displays the result externally. In addition to playing a role, "information about the amount of power used by each load within a predetermined demand time limit", "information about the voltage supplied to the loads, information about the current, information about the power" and "validity of the loads" It outputs a series of synchronization signals containing information on the amount of power at once, for example, to the maximum demand power monitoring control block 300 side.

Of course, as mentioned above, since the DM 220 is sealed and managed by the national power management organization (for example, KEPCO), it can not be opened arbitrarily without the approval of the agency.

Meanwhile, the previous maximum demand power monitoring control block 300 detects a synchronous signal output from the DM 220 while being electrically connected to the DM 220, and uses the loads 2 within the demand time limit. To grasp the amount of power, and if the power consumption of the specific loads (2) is expected to exceed the predetermined target amount of power, the role of selectively turning on and off a part of the loads (2) according to the predetermined priority Do this.

In addition, the maximum demand power monitoring control block 300 calculates the power factor of each load 2 based on the information on the amount of effective power of the loads 2 contained in the synchronization signal output from the DM 220 side. If it is determined that the power factor of the specific loads 2 is less than or equal to the preset reference power factor, the loads 2 are electrically connected to the series of power factor correction capacitors 317 to perform the corresponding loads. It serves to suppress the power factor drop of the field (2).

In addition, the maximum demand power monitoring control block 300 calculates the power factor of the transformers, based on the information on the amount of effective power of the transformers 240 contained in the synchronization signal output from the DM 220 side, the corresponding power factor calculation It serves to display the result to the outside.

In addition, the disconnect switches 230 may be electrically connected to the aforementioned loads 2, the transformers 240, and the maximum demand power monitor control block 300. On and off according to the control, and serves to select and transfer the power output from the transformers 240 to each load (2).

At this time, as shown in the drawing, the maximum demand power monitoring control block 300 of the present invention is large, the maximum demand power monitoring / control unit 301, load control unit 309, power factor calculator 308, power factor controller ( 310) and the like.

At this time, the maximum demand power monitoring / control unit 301 analyzes the synchronization signal output from the above-described DM 220, and performs the role of collectively selecting and controlling each module disposed in the block (300).

In addition, the load control unit 309 is electrically connected to the disconnect switches 230 in a state of establishing a signal connection relationship with the previous maximum demand power monitoring / control unit 301, in this state, the maximum demand power monitoring / The control unit 301 exceeds the predetermined target power amount according to " information about the amount of power used by the loads 2 within the preset demand time limit " contained in the synchronous signal. And a series of load control signals for turning on and off the loads 2, by controlling the disconnect switches 230 according to the load control signal, the loads 2 A part of the to induce to selectively turn on and off according to a predetermined priority.

In addition, the power factor calculating unit 308 forms a series of signal connection relations with the maximum demand power monitor / control unit 308, from the DM 220 side under the control of the maximum demand power monitor / control unit 301. Each transformer 240 and each load 2 are analyzed by analyzing information on the amount of available power of each transformer 240 and information about the amount of available power of each load 2 included in the output synchronization signal. ) To calculate the power factor.

In addition, while the power factor adjusting unit 310 forms a series of signal connection relations with the maximum demand power monitoring / control unit 301, the maximum demand power monitoring / control unit 301 calculates the calculation result of the power factor calculating unit 308. When it is determined that the "total power factor of the specific loads (2) is below the predetermined reference power factor", and transmits a series of power factor control signals for raising the total power factor of the loads (2) In accordance with the power factor control signal, the load 2 is electrically connected to a specific power factor correcting capacitor 317, thereby inducing the overall power factor rise of the loads 2.

Meanwhile, as shown in the drawing, the maximum demand power monitoring control block 300 includes the aforementioned maximum demand power monitoring / control unit 301, the load control unit 309, the power factor calculator 308, and the power factor controller 310. In addition, the voltage calculator 306a, the current calculator 306b, the power calculator 306c, the active power amount calculator 307, the magnetic switch 316, and the like are further disposed.

At this time, the voltage calculating unit 306a is output from the DM 220 under the control of the maximum demand power monitoring / control unit 301 while forming a series of signal connection relationships with the previous maximum demand power monitoring / control unit 301. Analyze " information about the voltage supplied to the loads 2 " contained in the synchronized signal and control the voltage display unit 311 according to the analysis result, so that the external display of the corresponding voltage information can be properly adjusted. The current calculation unit 306b forms a series of signal connection relationships with the maximum demand power monitoring / control unit 301 and under the control of the maximum demand power monitoring / control unit 301, the DM 220. By analyzing the "information about the current supplied to the loads 2" contained in the synchronization signal output from the control panel, and controlling the current display unit 312 according to the analysis result, the external display of the current information can be appropriately adjusted. Can serve to manage The.

At the same time, the power calculation unit 306c is formed from the DM 220 under the control of the maximum demand power monitoring / control unit 301 while forming a series of signal connection relationships with the previous maximum power demand monitoring / control unit 301. By analyzing the "information about the power supplied to the load (2)" contained in the output synchronization signal, and controlling the power display unit 313 according to the analysis result, so that the external display of the power information can be properly adjusted The effective power amount calculating unit 307 forms a series of signal connection relationships with the maximum demand power monitoring / control unit 301 and under the control of the maximum demand power monitoring / control unit 301, the DM By analyzing the "information about the amount of effective power of the load (2)" contained in the synchronization signal output from the 220, and controlling the effective amount of power display unit 314 according to the analysis result, External display adjusts accordingly It manages to be possible.

In addition, the magnetic switch 316 has a series of signal connections with the aforementioned power factor control unit 310, and is electrically connected to the loads 2 and the power factor correction capacitor 317, and in this state, By being turned on and off under the control of the power factor adjusting unit 310, the power factor selectively serves to form an electrical connection between the loads 2 and the power factor correction capacitor 317.

On the other hand, as shown in the drawing, the maximum demand power monitoring control block 300 includes the above-mentioned voltage calculator 306a, current calculator 306b, power calculator 306c, active power amount calculator 307, magnetic switch In addition to 316, a signal converter 302, an information storage 303, a key processor 304, a predicted power consumption calculator 305, and the like are further disposed.

At this time, the signal conversion unit 302 is the interface between the DM 220 and the maximum demand power monitoring / control unit 301, the maximum demand power monitoring / control unit 301 is a synchronization signal output from the DM 220 It converts the signal suitable for processing, and transfers the changed synchronization signal to the maximum demand power monitoring / control unit 301, and sends the request signal output from the maximum demand power monitoring / control unit 301 to the DM (220). ) Changes to a signal suitable for processing, and transmits the changed request signal to the DM (220).

In addition, the information storage unit 303 has a series of signal connection relations with the previous maximum demand power monitoring / control unit 301, and under the management of the maximum demand power monitoring / control unit 301, for example, " user " Implementation of the present invention such as a target power value set by the controller, priority of specific loads 2 which can be temporarily stopped, reference power factor of each transformer 240, reference power factor of each load 2,. It plays a role of storing and managing a series of necessary information, and the predicted power consumption calculation unit 305 monitors the maximum demand power in a state in which a series of signal connection relations with the previous maximum power demand monitoring / control unit 301 are formed. / Under the control of the control unit 301, and serves to count the demand time, each load in consideration of, for example, "a target power value stored in the information storage unit 303, the progress of the demand time", etc. Calculate the predicted power consumption of (2), and calculate the Vs. serves to return to the power demand monitoring / control unit (301).

At the same time, the key processing unit 304 forms a series of signal connection relationships with the maximum demand power monitoring / control unit 301 and, through the keyboard 1, under the management of the maximum demand power monitoring / control unit 301. It serves to deliver the input user setting information to the maximum demand power monitoring / control unit 301. In this case, the power user may advance the computerized operation using the keyboard 1 to set a desired target power value in advance in the maximum demand power monitoring control block 300.

Hereinafter, the operation of the maximum demand power monitoring control system 300 according to the present invention having the above-described configuration will be described in detail.

First, when the power (P) is supplied from the outside to the receiving station installed the maximum demand power monitoring and control system 300 of the present invention, the MOF 210 transforms this power through PT 211, CT 212 / A current is transformed and the transformed / converted power P is output to, for example, the "transformer 240 side", the "DM 220 side", and the like.

In this state, the DM 220 accumulates the amount of power used by each load 2 within a preset demand time period, for example, 15 minutes, and displays the result externally.

In addition, the DM 220 provides information on the amount of power used by each of the loads 2 within the preset time limit, information on voltage supplied to the loads 2, information on current, and power. Information "," information about the amount of effective power of the transformers 240 "and" information about the amount of effective power of the loads 2 "at the same time, for example, to the maximum demand power monitoring control block 300 Output

At this time, the signal conversion unit 302 on the side of the maximum demand power monitoring control block 300 changes the synchronous signal output from the DM 220 side into a signal suitable for the maximum demand power monitoring / control unit 301 to process. , And outputs the changed synchronization signal to the maximum demand power monitoring / control unit 301.

In this state of infrastructure, the maximum demand power monitoring / control unit 301 detects the synchronization signal output from the DM 220 side, and grasps "the amount of power used by each load 2 within the demand time." In addition, the result is transmitted to the predicted power calculating unit 305 and maintains a series of signal exchange processes with the information storage unit 303 and the predicted power calculating unit 305 to obtain a series of target power values and predicted power values. It is reported in real time, and through this, it continuously predicts and determines whether the power usage of the specific loads 2 exceeds the predetermined target power amount.

At this time, when the power usage of the specific load (2) is expected to exceed the predetermined target amount of power, the maximum demand power monitoring / control unit 301 immediately, "temporary use previously stored in the information storage unit 303 With reference to the priority of the specific loads 2 that can be interrupted ", a series of load control signals for turning on / off the loads 2 are transmitted to the load control unit 309, and the load control unit 309 is at a maximum. As soon as such a load control signal is transmitted from the power demand monitoring / control unit 301, according to the load control signal, by controlling the disconnection switch 230, some of the loads 2 are selectively turned on according to a preset priority. Induce to be off.

When the maximum power demand monitoring / control unit 301 and the load control unit 309 has completed the linking operation, the power P output from the MOF 210 and passed through the transformers 240 via the cutoff switch 230. As a result, electric power consumers can easily enjoy the effects of "maximum power demand suppression", "efficient use of power", "electricity savings", and "overload control". do.

Under the conventional maximum demand power monitoring / control system, the maximum demand power monitoring control block is transformed and flowed into a predetermined low voltage after receiving power P passing through the MOF through the transformers and the low voltage power processing blocks. Since the "load automatic on / off control process" was carried out, in addition to the PT and CT of the MOF, the PT and CT for the low-voltage power processing block had to be additionally arranged in the conventional system. As a result, the number of PT and CT was increased. Unnecessary "space allocation problems" and "installation and management problems" were caused by the increase.

However, in the present invention, as described above, since the series of "maximum demand power monitoring control mechanisms" is newly improved to "a form using a high voltage synchronization signal output from the DM 220," the maximum demand power monitoring of the present invention. Under the control system 200 system, in addition to the MOF 210, PTs and CTs for the low-voltage power processing block can be stably removed, and as a result, power users need unnecessary " spatial space problem " "," Installation and maintenance problems "can be easily avoided.

On the other hand, at the point when the above-described maximum demand power monitoring control process is in progress, the maximum demand power monitoring / control unit 301 detects a synchronous signal output from the DM 220 side, and the " effective power amount of the transformers 240 " Information "," information on the amount of effective power of the loads 2 ", and the like, and the information is transmitted to the power factor calculator 308, and the information storage unit 303 and the power factor calculator 308 and a series of signals. By maintaining the exchange process, a series of reference power factor values and current power factor values of the loads 2 are reported in real time, thereby continuously determining whether the power factor of the specific loads 2 falls below a preset reference power factor. do.

When this process is in progress, the power factor calculator 308, under the control of the maximum demand power monitor / control unit 301, contains " information about the amount of effective power of the transformers 240 " contained in the synchronization signal output from the DM 220. By analyzing the "information on the amount of effective power of the loads 2" and the like, and control the power factor display unit 315 according to the analysis result, so that the corresponding power factor information can be displayed quickly to the outside, through Induces power users to easily monitor current "transformer power factor information" and "load power factor information".

In the conventional case, since each power factor controller performs a series of power factor calculation processes based on the power that has passed through the transformer, in the conventional system, each power factor controller is merely a power factor of loads belonging to each transformer. Only the power factor of the transformer itself could not be calculated, and as a result, the power user could not normally manage the power factor of the transformer.

However, in the case of the present invention, since the power factor controller 310 performs a series of power factor calculation processes based on the power before passing through the transformer 240, that is, information transmitted from the DM 220 side, Under the system of the present invention, the power factor adjusting unit 310 can calculate not only the power factor of the loads 2 belonging to each transformer 240 but also the power factor of the transformer 240 itself. When implemented, the power user can normally manage the power factor of the transformer 240 by observing the power factor display unit 315.

On the other hand, in the above-described process, when it is determined that the total power factor of the loads 2 is below the preset reference power factor, the maximum demand power monitoring / control unit 301 immediately determines the power factor of the respective loads 2. The power factor control unit 310 transmits a series of power factor control signals for raising the power factor control unit 310, and the power factor control unit 310 immediately controls such a power factor control signal from the maximum demand power monitoring / control unit 301. By controlling the magnetic switch 316 in accordance with the signal, the loads 2 are electrically connected to a specific power factor correcting capacitor 317, thereby inducing a power factor rise of the loads 2.

When the linkage operation of the maximum demand power monitoring / control unit 301 and the power factor control unit 310 is completed, the loads 2 are electrically connected to a specific capacitor 318 through the magnetic switch 316. As a result, the total power factor is increased, and as a result, the power consumer can easily obtain the advantage that the overall power factor of each load 2 is maintained, for example, 95% or more.

Under the conventional maximum demand power supervisory control system, since each power factor controller is in a form belonging to each transformer, the power factor controller is required to control the power factor of loads belonging to each transformer. In proportion to the number of the transformers, it was inevitable to increase, and, consequently, under the conventional system, the electric power user had a great difficulty in installing and managing the maximum demand power supervisory control system.

In addition, under the conventional system, since each power factor controller performs a series of power factor calculation processes based on the low voltage power passing through the transformer, the power factor control accuracy is significantly reduced compared to the case of high pressure. Inevitably, under conventional systems, power users were forced to take extra measures to improve power factor control accuracy.

However, in the present invention, as described above, since the series of "power factor adjustment mechanism" is newly improved to "a form using a high voltage synchronization signal output from the DM 220", the maximum demand power monitoring / control system of the present invention. Under (200) regime, the "power factor adjustment function of the loads" can be integrated into one unit module in the block 300, irrespective of the transformer 240, after all, the power user is "increasing the number of power factor adjustment problem" "," The power factor control precision degradation problem "and the like can be easily escaped.

On the other hand, at the point when the above-described maximum demand power monitoring control process, power factor adjustment process, etc. proceed, the maximum demand power monitoring / control unit 301 detects the synchronization signal output from the DM 220 side and supplies it to "loads." Information about the voltage to be obtained ”and transfers it to the voltage calculator 306a.

In this case, the voltage calculator 306a analyzes "information about the voltage supplied to the loads 2" contained in the synchronization signal output from the DM 220 under the control of the maximum demand power monitor / control unit 301. By controlling the voltage display unit 311 according to the analysis result, the voltage information can be quickly displayed to the outside, thereby inducing the power user to easily grasp the current voltage information.

In addition, the maximum demand power monitoring / control unit 301 detects the synchronization signal output from the DM 220 side to grasp " information about the current supplied to the loads 2 " Proceed with the delivery process.

In this case, under the control of the maximum demand power monitoring / control unit 301, the current calculating unit 306b analyzes the " information about the current supplied to the loads " contained in the synchronization signal output from the DM 220, and the analysis thereof. By controlling the current display unit 312 according to the result, the current information can be quickly displayed to the outside, thereby inducing the power user to easily grasp the current current information.

In addition, the maximum demand power monitoring / control unit 301 detects a synchronization signal output from the DM 220 side to grasp " information about power supplied to the loads 2 " Proceed with the delivery process.

In this case, the power calculating unit 306c analyzes the " information about the power supplied to the loads 2 " contained in the synchronization signal output from the DM 220 under the control of the maximum demand power monitoring / control unit 301. By controlling the power display unit 313 according to the analysis result, the power information can be quickly displayed to the outside, thereby inducing the power user to easily grasp the current power information.

In addition, the maximum demand power monitoring / control unit 301 detects a synchronous signal output from the DM 220 side, and grasps "information about the amount of effective power of the loads 2", and calculates the amount of the effective power amount calculating unit ( 307).

In this case, the effective power amount calculating unit 307 analyzes the "information about the effective amount of effective power of loads" contained in the synchronization signal output from the DM 220 under the control of the maximum demand power monitoring / control unit 301, and By controlling the effective power amount display unit 314 according to the analysis result, the effective power amount information can be quickly displayed to the outside, thereby inducing the power user to easily grasp the current effective power amount information. .

Under the conventional maximum demand power monitoring / control system, the maximum demand power monitoring control block is transformed and rectified by a predetermined low pressure of the power P through the MOF through the transformers and the low voltage power processing blocks. Since the "power related information display process" was carried out, in addition to the PT and CT of the MOF, the PT and CT for the low voltage power processing block had to be additionally disposed in the system, and as a result, it was unnecessary as the number of PT and CT increased. "Spatial issues" and "installation and maintenance problems" were caused.

However, in the present invention, as described above, a series of "power related information (voltage, current, power, and effective amount of power) display mechanism" is newly improved to "a form using a high voltage synchronization signal output from the DM 220". Therefore, under the system of the maximum demand power monitoring / control system 200 of the present invention, in addition to the MOF 210, the PT, CT for the low-voltage power processing block can be stably removed. Unnecessary "space problem" and "installation and management problem" can be easily avoided by increasing the number of.

As described in detail above, in the present invention, a series of high-voltage synchronous signals output from the DM to a part of the maximum demand power monitoring control block includes "maximum demand power monitoring control of loads," "power related information display," and "power factor of the transformer." A stable module environment that can be newly utilized for the purpose of adjustment, power factor adjustment of loads, and the like, and through this, the conventional "maximum demand power monitoring control mechanism", "power related information display mechanism", "power factor adjustment mechanism" By enabling the lamp to be newly improved in the form of using the high-pressure synchronous signal output from the DM, the PT and CT contributing to the maximum demand power monitoring of the load can be stably removed in the system. In addition to induction, “total power factor control of transformers” and “total power factor control of loads” are transferred into a single module within the block. It leads so that they can be.

According to the implementation of the present invention, when the "stable removal of PT, CT contributing to the maximum demand power monitoring of the load" and "integration in the block of the power factor adjustment function" is implemented, the power user is the number of PT, CT Easily solve the "space issue", "installation and management" and "system management issues", "transformer power factor control" and "power factor control" problems I can receive it.

While specific embodiments of the invention have been described and illustrated above, it will be apparent that the invention may be embodied in various modifications by those skilled in the art.

Such modified embodiments should not be understood individually from the technical spirit or point of view of the present invention and such modified embodiments should fall within the scope of the appended claims of the present invention.

Claims (7)

In the maximum demand power supervisory control system for monitoring and controlling the maximum demand power of loads electrically connected to transformers installed in any power station, A series of PTs (Power Transformers) and CTs (Current Transformers) are provided in a single circuit block, and MOF (Metering) that transforms / converts electric power supplied from the outside to the power station through the PTs and CTs and supplies them to the transformers. Out-Fit); It is electrically connected to the MOF and displays the amount of power used by each of the loads within a predetermined demand time limit and displays it externally, as well as "information on the amount of power used by each of the loads within a predetermined demand time limit." Demand Meter (DM) which outputs a series of synchronization signals including information on voltage supplied to loads, information on current, information on power "and" information on the transformers and the amount of effective power of loads " and; It is electrically connected to the DM and detects the synchronization signal output from the DM to determine the amount of power used by each of the loads within the demand time limit, and if the power consumption of specific loads exceeds a predetermined target amount of power. When it is expected, the power factor of the loads is calculated on the basis of information on the amount of effective power of the loads contained in the synchronization signal, and selectively turning on / off some of the loads according to a preset priority. If it is determined that the total power factor of the specific loads is less than or equal to a predetermined reference power factor, the loads are electrically connected to a specific power factor correcting capacitor to suppress the power factor drop of the loads and to store the power factor. Power factor of the transformers based on the information about the amount of effective power of the transformers A maximum demand power supervisory control block that calculates a value, and displays a corresponding transformer power factor calculation result to the outside; It is electrically connected to the loads, transformers and the maximum demand power monitoring control block, is turned on and off under the control of the maximum demand power monitoring control block, selects and delivers the power output from the transformers to the loads Maximum demand power supervisory control system comprising a disconnect switch. 2. The apparatus of claim 1, wherein the maximum demand power monitoring control block comprises: a maximum demand power monitoring / control unit for analyzing and selecting the control signal from the DM and collectively selecting and controlling each module disposed in the block; In a state in which a signal connection relationship is established with the maximum demand power monitoring / control unit, the load switch is electrically connected to each other, and the maximum demand power monitoring / control unit is within the preset demand time limit contained in the synchronization signal. Information regarding the amount of power used by the controller, when the power consumption of the specific loads is expected to exceed the preset target power amount, and a series of load control signals for turning on / off the loads is transmitted. Accordingly, the load control unit controls the cutoff switch to induce some of the loads to be selectively turned on or off according to a preset priority; A series of signal connection relationships are formed with the maximum demand power monitoring / control unit, and under the control of the maximum demand power monitoring / control unit, information about the effective power amount of the transformers and loads included in the synchronization signal is analyzed, A power factor calculator for calculating power factors of transformers and loads; And forming a series of signal connection relations with the maximum demand power monitoring / control unit, and according to the calculation result of the power factor calculator, the maximum demand power monitoring / control unit determines that the power factor of specific loads falls below a preset reference power factor. In the case of transmitting a series of power factor control signals for increasing the power factor of the loads, the power factor is controlled by electrically connecting the loads with the specific power factor correction capacitor according to the power factor control signal to induce power factor increase of the loads. Maximum demand power monitoring and control system comprising a unit. The power supply monitoring control block of claim 2, wherein the maximum demand power monitoring control block is electrically connected to the loads and the power factor correcting capacitor in a signal connection relationship with the power factor control unit, and is turned on under the control of the power factor control unit. And a magnetic switch which is turned off to selectively form an electrical connection between the loads and the power factor correcting capacitor. 3. The load controller of claim 2, wherein the maximum demand power monitoring control block forms a series of signal connection relationships with the maximum demand power monitoring / control unit, and under the control of the maximum demand power monitoring / control unit, the "load load" contained in the synchronization signal. And a voltage calculation unit for analyzing information on the voltage supplied to the plurality of terminals and managing an external display of the corresponding voltage information. The load demand monitoring control block of claim 2, wherein the maximum demand power monitoring control block forms a series of signal connection relations with the maximum demand power monitoring / control unit, and under the control of the maximum demand power monitoring / control unit, the "load" contained in the synchronization signal is used. And a current calculation unit for analyzing information on the current supplied to the controller and managing an external display of the current information. The load demand monitoring control block of claim 2, wherein the maximum demand power monitoring control block forms a series of signal connection relations with the maximum demand power monitoring / control unit, and under the control of the maximum demand power monitoring / control unit, the "load" contained in the synchronization signal is used. And a power calculation unit for analyzing information on the power supplied to the controllers and managing an external display of the corresponding power information. The load demand supervisory control block of claim 2 forms a signal connection relationship with the maximum demand power monitor / control unit, and under the control of the maximum demand power monitor / control unit, the load of the loads contained in the synchronization signal is determined. The maximum demand power monitoring and control system, characterized in that it further comprises a valid power amount calculation unit for analyzing the information on the effective amount of power, and manages the external display of the relevant effective amount of power information.