KR102320332B1 - Controlling system of load bank and controlling method thereof - Google Patents

Abstract

The present invention relates to a load bank control system and a control method, and the load bank control system according to an embodiment of the present invention includes a plurality of wires electrically connected with power to test a load for applied power. load bank; a control device electrically connected to each of the plurality of load banks and configured to control the plurality of load banks; an analog controller for manually transmitting a set value to the control device; and a communication module for remotely transmitting a set value to the control device, wherein the plurality of load banks each have a load for outputting a load amount for the applied power and a load for applying the applied power to the load. It may include an electronic connector. According to the present invention, it is possible to variably control the output amount of the load bank, when the power generated by the generator is applied, there is an effect that can more accurately control the output.

Description

CONTROLLING SYSTEM OF LOAD BANK AND CONTROLLING METHOD THEREOF

The present invention relates to a load bank control system and control method, and more particularly, to a load bank control system and control method capable of controlling a load bank that tests a load in a large-capacity PV power generation.

A load bank is a device in which various electrical loads are installed to test a generator or uninterruptible power supply. Loadbanks can be applied to test generators, uninterruptible power supplies or battery systems or turbine plants. Such a load bank may include a load device such as a heater, a resistor, a reactor, or a capacitor for testing.

The load bank has a combination of a resistor and a reactor, and when only a resistor is tested, the rated output can be tested purely, and when a resistor and a reactor are combined, the power factor load can be tested.

However, if the load bank is not accurately controlled in order to test a large-capacity output such as a large-capacity photovoltaic generator, there is a risk of failure or damage to the generator.

That is, the load bank needs to be controlled such that the generated large-capacity power is applied to the load bank to generate a load output, such as a large-capacity photovoltaic generator. However, if the output amount of the load bank is not accurately set to match the power applied at this time, a problem in which the large-capacity photovoltaic generator is broken or damaged may occur.

Republic of Korea Patent Registration No. 10-1427067 (2014.07.30.) Republic of Korea Patent Registration No. 10-1202782 (2012.11.13.)

An object of the present invention is to provide a load bank control system and control method capable of stably testing a power supply device by accurately controlling the output device of a photovoltaic generator, which is a power supply device.

In addition, an object of the present invention is to provide a load bank control system and control method capable of checking or testing a power supply device by performing remote control and variable capacity adjustment in various environments.

A loadbank control system according to an embodiment of the present invention includes: a plurality of loadbanks electrically connected to wires to which power is applied in order to test a load for applied power; a control device electrically connected to each of the plurality of load banks and configured to control the plurality of load banks; an analog controller for manually transmitting a set value to the control device; and a communication module for remotely transmitting a set value to the control device, wherein the plurality of load banks each have a load for outputting a load amount for the applied power and a load for applying the applied power to the load. It may include an electronic connector.

Each of the plurality of load banks may further include a relay for driving the load electronic connector, and the relay may receive a signal from the control device.

a voltage sensor for measuring a voltage with respect to the applied power; and a current sensor for measuring a current with respect to the applied power.

The circuit breaker further includes a circuit breaker for controlling the applied power to be applied to the plurality of load banks, wherein the wiring circuit breaker may be controlled by the control device.

A load bank control method according to an embodiment of the present invention includes: confirming initial settings for a plurality of load banks in order to test a load for applied power; sensing the voltage and current of the applied power; checking data for the initial setting; controlling some or all of the plurality of loadbanks to be driven for testing the load for the applied power according to the amount of the load for the applied power by calculating a set value for the checked data; reconfirming data for the initial setting; checking whether the data for the confirmed initial setting and the data for the reconfirmed initial setting match; And when the data for the confirmed initial setting and the data for the reconfirmed initial setting do not match, controlling some or all of the plurality of load banks to be driven according to the amount of load for the applied power. can

The method further includes the step of sensing the voltage and current applied to the applied power, and setting manual setting or remote setting, and when manual setting is set, the data for the initial setting may be a manually set value.

The method further includes the step of sensing the voltage and current of the applied power and setting manual setting or remote setting, and when the remote setting is set, the data for the initial setting is data set by analyzing the data received remotely can be

According to the present invention, it is possible to variably control the output amount of the load bank, when the power generated by the generator is applied, there is an effect that can more accurately control the output.

In addition, since the output amount of the load bank can be manually or remotely controlled, even if the power generated by the generator is changed, the output amount of the load bank can be controlled accordingly, thereby preventing failure or damage of the generator.

1 is a functional block diagram illustrating a loadbank control system according to an embodiment of the present invention.
2 is a block diagram illustrating a load bank control system according to an embodiment of the present invention.
3 is a flowchart illustrating a method for controlling a load bank control system according to an embodiment of the present invention.

It should be noted that the technical terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be interpreted as meanings generally understood by those of ordinary skill in the art to which the present invention belongs, unless otherwise defined in the present invention. It should not be construed in the meaning of a human being or in an excessively reduced meaning.

In addition, when the technical term used in the present invention is an incorrect technical term that does not accurately express the spirit of the present invention, it should be understood by being replaced with a technical term that can be correctly understood by those skilled in the art.

Also, as used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the present invention, "consisting of." or "includes." The terms such as etc. should not be construed as necessarily including all of the various components or steps described in the invention, some of which may not be included, or additional components or steps may be added. should be construed as inclusive.

In addition, it should be noted that the accompanying drawings are only for easy understanding of the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the accompanying drawings.

1 is a functional block diagram illustrating a loadbank control system according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating a loadbank control system according to an embodiment of the present invention.

The load bank control system 100 according to an embodiment of the present invention is used to measure the rated output or power factor load of a generator or uninterruptible power supply. In this embodiment, the load bank control system 100 will be described. In order to do this, an example applied to a solar power generator will be described.

However, the present invention is not limited thereto, and the load bank control system 100 according to the present embodiment may be applied to other types of generators.

Globally, the photovoltaic industry is continuously increasing, Germany and Europe are growing with government support, and China, the United States, and Japan are rapidly expanding by existing companies or a large number of new companies are entering the market. There is competition for cost and efficiency. In addition, recently, there is a trend to develop technologies that combine IOT technologies with blockchain or artificial intelligence.

As described above, although the photovoltaic industry is developing, incidents and accidents at photovoltaic power plants also occur one after another, so it is necessary to evaluate the safety of the photovoltaic power generator in the photovoltaic industry to secure the safety of the photovoltaic power plant. The load bank control system 100 according to this embodiment is a technology for securing the stability of such a generator.

1 and 2 , the load bank control system 100 according to an embodiment of the present invention includes a circuit breaker 110 , a main electronic connector 120 , a load bank 130 , and an analog controller 140 . , a control device 150 , an MCU, a display 160 , and a communication module 170 .

The circuit breaker 110 for wiring may be disposed on the main wiring and may be electrically connected to a generator or commercial power source. In addition, the circuit breaker 110 for wiring is electrically connected to the main electronic connector 120 , and is provided to block the electrical connection with the main electronic connector 120 when there is an abnormality in the generator or the power used.

The main electronic connector 120 is disposed between the circuit breaker 110 and the load bank 130 , and is provided to block power applied to the load bank 130 . The main electronic connector 120 may be omitted if necessary, and may be controlled by a control device 150 to be described later.

The load bank 130 includes a load, a load electronic connector 134 and a relay 136, and various types of loads may be used as the load. For example, a plurality of resistors or heaters may be used for the rod, and a plurality of resistors or heaters may be disposed in parallel. Alternatively, the load may be configured with multiple reactors in parallel.

Also, in this embodiment, a rod electronic connector 134 is disposed on each rod. That is, the load electronic connector 134 may be electrically connected to each of the plurality of rods. Each of these load electronic connectors 134 may be controlled independently, and may be switched to control each load to be electrically connected to the load bank control system 100 .

In this embodiment, the load electronic connector 134 may be independently controlled by a control device 150 to be described later, and may be controlled manually or remotely.

The relay 136 is electrically connected to the load electronic connector 134 , and may operate the load electronic connector 134 by a signal received from the control device 150 . To this end, the relay 136 is installed in each of the plurality of load banks 130 , and may be electrically connected to the load electronic connector 134 included in each load bank 130 .

The analog controller 140 is provided to manually control the control device 150 , and may convert an analog signal into a digital signal to input a signal to the control device 150 . In this case, the analog controller 140 may be manually controlled by a user. For example, the analog controller 140 is provided to set a manual setting value in the control device 150 .

The control device 150 controls the plurality of load banks 130 to be electrically connected to a generator or commercial power using signals received from the analog controller 140 and the communication module 170 to be described later.

Also, the control device 150 may sense a voltage value and a current value sensed from a voltage sensor and a current sensor that may be installed on the main wiring. In addition, the control device 150 may receive initial variable settings and remote data from the analog controller 140 or the communication module 170 .

Through this, the control device 150 controls the plurality of load banks 130 manually or remotely controls the plurality of load banks 130 . That is, the control device 150 sets initial parameters, senses input voltages and currents, and analyzes received remote data.

And when the variable (I) set by manual or remote control is 0 (zero), the control device 150 manually controls the plurality of load banks 130, and when the variable (I) is 1, the control device 150 Controls a plurality of loadbanks 130 remotely.

When the control device 150 calculates the load capacity according to the manual setting value, if the value of the variable (J) for setting whether to output is 0 (zero), the relay signal outputs an off signal, and the variable (J) If the value of J) is 1, the relay signal outputs an on signal. Accordingly, when the relay signal is an on signal, the control device 150 may control some or all of the plurality of load banks 130 to be electrically connected to the generator so as to correspond to the calculated load amount.

That is, the control device 150 may transmit a signal through which the load electrical connector may be electrically connected to the relay 136 respectively included in some or all of the plurality of load banks 130 to correspond to the calculated load amount. Accordingly, some or all of the plurality of load banks 130 may be driven to generate an output.

And the control device 150 checks the manual set value again, and if there is a change in the manual set value, calculates the load amount, changes the relay signal, and outputs the relay signal, and when there is no change in the manual set value, the relay signal according to the existing load print out

The control device 150 stops the operation when the variable (I) is 0 (zero) and the value of the variable (J) for setting whether to output is 0 (zero).

In addition, the control device 150 analyzes the data received from the communication module 170 for remote control and stops the operation if the emergency stop variable E is 0 (zero), and converts the analyzed data to the variable value ( R).

And if the variable (L) for the load set amount is 0 (zero), the operation is stopped, and if it is 1, the relay 136 according to the set value is driven to output the load. In this case, the driving of the relay 136 may independently drive each relay 136 included in each load bank 130 . That is, the control device 150 may transmit an independent signal to each relay 136 , and accordingly, the load electronic connector 134 may be driven independently.

Then, the control device 150 analyzes the received data again and changes the variable value (S). At this time, if the initial variable value (R) and the changed variable value (S) are the same, the existing load capacity is maintained, and if different, the relay signal is changed. Afterwards, if the variable (E) and the variable (L) are 0 (zero), the operation is terminated.

As described above, it is possible to prevent the test device from being damaged or the load bank 130 from being damaged when the load changes suddenly when the load changes or the operation stops as the control device 150 operates. In addition, the control device 150 may increase or decrease the number of the load banks 130 operating among the plurality of load banks 130 in stages.

The control device 150 may include a plurality (eg, four) of communication ports for connection with the communication module 170 , and control the relays 136 included in the plurality of load banks 130 . A port that can do this may be provided. In addition, it may be electrically connected to a voltage sensor and a current sensor that can measure an input voltage and current installed in the main wiring. In this case, a high-order filter for accurate measurement may be applied to the voltage sensor and the current sensor.

The communication module 170 may communicate with the control device 150 through UART communication, and may transmit/receive data to/from an externally installed server using a TCP/IP protocol. Therefore, through communication between the communication module 170 and the server, the user can monitor the operating state of the control device 150 through the server, and also remotely control the control device 150 through the communication module 170 . have.

The display 160 device is electrically connected to the control device 150 and displays the operating state of the control device 150 so that a user can check it.

3 is a flowchart illustrating a method for controlling a load bank control system according to an embodiment of the present invention.

A control method of the load bank control system 100 according to an embodiment of the present invention will be described with reference to FIG. 3 . In this case, it may be described with reference to the drawings shown in FIGS. 1 and 2 .

In this embodiment, the control device 150 may be operated by manual control or remote control. To this end, the control device 150 receives manual setting values or data from the analog controller 140 or the communication module 170 .

First, the control device 150 confirms the initial setting (S101).

Initial setting check is to check the set variable value for the power applied from the generator.

And when the initial setting is confirmed, the input voltage and the input current are sensed through the voltage sensor and the current sensor, and the remote data is checked (S102).

It is checked whether the variable I checked in step S102 is 0 (zero) (S103).

If the variable I is 0 (zero), the control device 150 is manually controlled, and if the variable I is not 0 (zero) (eg, 1), it is remotely controlled.

When the control device 150 is manually controlled, the manual setting value K is checked (S104). The manual setting value may be the initial setting confirmed in step S101.

In this way, the set value is calculated by checking the manual set value (K) (S105).

In this case, the control device may determine the amount of load whether to drive some or all of the plurality of load banks 130 by using the calculated set value.

When the set value is calculated, it is checked whether the value of the variable (J) for setting whether to output is 0 (zero) (S106). Accordingly, the control device 150, when the value of the variable (J) is 0 (zero), the relay signal outputs an off (off) signal, and when the value of the variable (J) is 1, the relay signal is an on (on) signal to output

Therefore, the control device 150 returns to step S102 if the value of the variable J is 0 (zero), and goes to the next step if the value of the variable J is 1.

That is, when the value of the variable J is 1, the control device 150 controls some or all of the plurality of relays 136 to be driven according to the set value (S107).

That is, in the control device 150 , some or all of the plurality of load banks 130 may be individually driven according to a load amount according to a set value.

And the control device 150 again confirms the manual set value (L) (S108). At this time, the manually set value (L) to be checked again may be the same as the manual set value (K) checked in step S104, but may be different.

Therefore, the control device 150 checks whether the two manually set values (K, L) are the same value (S109).

Accordingly, if the two manual setting values (K, L) are the same, the control of the relay 136 is maintained (S129), and if different, the control of the relay 136 is changed (S110). Changing the control of the relay 136 is to change the control of the relay 136 so that some or all of the plurality of load banks 130 can be electrically connected to the generator so that the control device 150 corresponds to the calculated load.

That is, the control device 150 may transmit a signal through which the load electrical connector may be electrically connected to the relay 136 respectively included in some or all of the plurality of load banks 130 to correspond to the calculated load amount. Accordingly, some or all of the plurality of load banks 130 may be driven to generate an output.

And the control device 150 checks whether the variable (I) is 0 (zero), and the value of the variable (J) for setting whether to output is 0 (zero) (S111).

Accordingly, when the variable (I) is 0 (zero) and the value of the variable (J) for setting whether to output is 0 (zero), the control device 150 stops the operation.

Also, when the variable I is 1 in step S103, the control device 150 analyzes the received data (S133).

Then, the control device 150 determines whether the emergency stop variable E is 0 (zero) (S134).

Accordingly, the control device 150 stops the operation when the emergency stop variable E is 0 (zero), and sets the data R when the emergency stop variable E is not 0 (zero) (eg, 1). do (S135).

Accordingly, it is checked whether the variable (L) for the load setting amount is 0 (zero) according to the analyzed data (R) (S136).

If the variable L is 0 (zero), the control device 150 stops the operation, and if it is 1, drives the relay 136 according to the set value to output the load (S137).

In this case, the driving of the relay 136 may independently drive each relay 136 included in each load bank 130 .

The control device 150 analyzes the received data S again (S138). At this time, the analyzed received data (S) may be the same as or different from the received data (R) analyzed in step S135.

Accordingly, it is determined whether the two received data R and S are the same (S140).

The control device 150 maintains control of the relay 136 when the two received data R, S are the same (S150), and controls the relay 136 when the two received data R, S are not the same. change (S141).

That is, the control device 150 maintains the existing load capacity when the two received data R and S are the same, and changes the relay signal when they are different.

Then, the control device 150 checks whether the variable E and the variable L are 0 (zero) (S142).

Accordingly, if the variable E and the variable L are 0 (zero), the operation is terminated, otherwise, the flow returns to step S138.

As described above, the detailed description of the present invention has been made by the embodiments with reference to the accompanying drawings, but since the above-described embodiments have only been described with preferred examples of the present invention, the present invention is limited only to the above embodiments. It should not be understood, and the scope of the present invention should be understood as the following claims and their equivalents.

100: load bank control system
110: circuit breaker for wiring
120: main electronic connector
130: load bank
132: load
134: rod electronic connector
136: relay
140: analog controller
150: control device
160: display
170: communication module

Claims (7)

A load electrically connected to a wiring to which power is applied in order to test a load for the applied power, a load for outputting a load amount for the applied power, a load electronic connector for applying the applied power to the load, and the a plurality of loadbanks including relays for driving the load electronics;
a control device electrically connected to each of the plurality of load banks and configured to control the plurality of load banks;
a voltage sensor that measures a voltage for the applied power and transmits it to the control device;
a current sensor measuring a current for the applied power and transmitting it to the control device;
an analog controller for manually transmitting a set value to the control device; and
a communication module for remotely transmitting a set value to the control device; and
The control device manually controls a plurality of load banks when the variable (I) set by manual or remote control is 0 (zero), and remotely controls the plurality of load banks 130 when the variable (I) is 1 control,
When the control device calculates the load capacity according to the manual set value by manual control, the relay signal outputs an off signal when the value of the variable (J) for setting whether to output is 0 (zero), When the value of the variable (J) is 1, the relay signal outputs an on signal, and accordingly, when the relay signal is an on signal, some or all of the plurality of load banks are driven to correspond to the calculated load amount. control to do
The control device checks the manual set value again and, if there is a change in the manual set value, calculates the load again and outputs the relay signal by changing the relay signal, and outputs a relay signal according to the existing load when there is no change in the manual set value, ,
The control device analyzes the received data from the communication module for remote control. At this time, if the emergency stop variable (E) is 0 (zero), the operation is stopped, and if the variable (E) is 1, the received data is set as a set value. do,
The control device, when the variable (L) for the load setting amount is 0 (zero), the relay signal outputs an off (off) signal, and when the variable (L) value is 1, the relay signal is an on (on) signal and, accordingly, when the relay signal is an on signal, control to drive some or all of the plurality of load banks to correspond to the calculated load amount,
The control device analyzes the received data again, and when there is a change in the received data, the load amount is calculated again, and the relay signal is changed and output, and when there is no change in the received data, the relay signal is output according to the existing load. loadbank control system.
delete delete The method according to claim 1,
Further comprising a circuit breaker for controlling the applied power to be applied to the plurality of load banks,
The load bank control system in which the circuit breaker for wiring is controlled by the control device.
(a) confirming the initial settings for a plurality of loadbanks to test the load against the applied power;
(b) sensing the voltage and current of the applied power;
(c) confirming the manual control or remote control parameter (I)
(d) If it is confirmed as a manual control variable in step (c),
(d-1) confirming the manual setting value for the initial setting;
(d-2) After confirming the manual set value, the set value is calculated to determine the amount of load on the applied power so that some or all of the plurality of load banks for testing the load on the applied power are driven to do;
(d-3) checking the output setting variable (J) when the set value is calculated;
(d-4) when it is confirmed as the output variable in (d-3), controlling some or all of the plurality of load banks to be driven according to the set value;
(d-5) reconfirming the manual setting value;
(d-6) checking whether the manually set value in step (d-1) matches the reconfirmed manual set value in step (d-5); and
(d-7) If the manual set value and the reconfirmed manual set value match (d-4) control is maintained, and when the manual set value does not match the reconfirmed manual set value, the applied power is controlling some or all of the plurality of load banks to be driven according to the amount of load;
(e) If it is confirmed as an automatic control variable in step (c),
(e-1) analyzing the received data for the initial setting;
(e-2) determining an emergency stop variable (E);
(e-3) When it is determined as a variable other than an emergency stop in (e-2), the plurality of values for testing the load for the applied power by calculating a set value according to the received data analyzed for the initial setting determining a load amount for the applied power to drive some or all of the loadbanks of the ;
(e-4) checking the variable (L) for the load set amount;
(e-5) controlling some or all of the plurality of load banks to be driven according to the set value if it is determined as a variable other than the load set amount;
(e-6) re-analyzing the received data;
(e-7) When the received data and the re-analyzed received data value match (e-5) control is maintained, and when the received data and the re-analyzed received data do not match, the load for the applied power is Load bank control method comprising a; controlling some or all of the plurality of load banks according to the driving.
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