KR101674570B1 - System for diagnosis and remote control using dummy load and method thereof - Google Patents

Abstract

The present invention diagnoses a power supply at a remote or near area to use a power supply such as an automatic voltage regulator (AVR) and a switched mode power supply (SMPS) in a safe range and protects the load, The present invention relates to an apparatus and method for real-time monitoring of a power supply apparatus using a dummy load, real-time monitoring, and real-time monitoring of each electric apparatus and an electric apparatus by automatic or manual monitoring.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diagnosis and remote control system using a dummy load,

The present invention relates to a diagnosis and remote control system and a method thereof using a dummy load, and more particularly, to a power supply system such as an automatic voltage regulator (AVR) and a switched mode power supply (SMPS) The present invention relates to a device and a method for preliminary diagnosis of a power supply device at a remote site or a local area in order to protect a load, real-time diagnosis, and real-time monitoring of each electric device and an electric device.

Power supplies such as automatic voltage regulators and Switched Mode Power Supply (SMPS) to reliably supply a constant voltage to loads such as electronics and lighting systems that consume electricity in areas where power supply is not smooth and input voltage fluctuates Device. In particular, lighting devices and systems such as LED lighting may be connected to automatic voltage regulators and SMPSs to maintain constant brightness and maintain stable performance.

There are three considerations in the use of automatic voltage regulators and power supplies: First, if the automatic voltage regulator and the power supply are operating abnormally, the load connected to the automatic voltage regulator may not operate properly or may be damaged. In the case of failure of one load, malfunction of other loads directly or indirectly connected It can cause malfunction. Second, if the power consumed by the load system exceeds the capacity of the power supply and the automatic voltage regulator, the power supply and the automatic voltage regulator may be damaged and some or all loads of the connected load system may be damaged. Therefore, there is a need for an efficient method and apparatus for checking and controlling the automatic voltage regulator, the power supply, and the connected load system to prevent failure and damage.

Third, there is a need for an apparatus and a technique for quickly monitoring an abnormal operation of the system and normalizing the system in an effective time by remotely monitoring and controlling the system including the automatic voltage regulator, the power supply, and the load.

In the technology of checking and controlling the automatic voltage regulator, the power supply and the connected load system, the conventional technology mainly uses the sensor to measure the current, voltage and temperature of the power supply and the load and to control based on the measured data Recently, an apparatus and a method for remotely monitoring and controlling current, voltage, and temperature of a power supply device and a load using wired / wireless communication have been developed. Patent Document 1 discloses a technology for detecting and controlling a fault condition of a voltage regulator with a sensor, and Patent Document 2 proposes a technology for monitoring and remotely controlling a load using wired or wireless communication. However, there is no technology for diagnosing and controlling abnormal operation of the automatic voltage regulator and the power supply device in advance, and there is no technology for guaranteeing QoS (Quality of Service) for smooth remote monitoring and remote control.

1. United States Patent No. 7554778 (registered on June 30, 2009) 2. Korea registered patent No. 1081959 (registered on November 9, 2011)

In order to solve the above problem, the present invention diagnoses whether the normal operation of the SMPS (switching mode power supply) connected to the automatic voltage regulator and the automatic voltage regulator is performed before the operation of the load system, SMPS, and load system by controlling the automatic voltage regulator, SMPS, load and load system based on the information obtained from the diagnosis and monitoring.

In addition, diagnostic information and monitoring information of voltage regulator, SMPS and load system are inquired in real time using mobile device and abnormality operation or abnormality is controlled within a short time, so that malfunction and damage of automatic voltage regulator, SMPS and load system .

According to an aspect of the present invention, there is provided a diagnosis and remote control system using a dummy load, the system comprising: a dummy load including a switch installed at an output of a power supply to diagnose a sensing function of an output power variation of the power supply; road; A power communication module for receiving a diagnostic command to be performed by the dummy load or transmitting diagnosis result information of the dummy load; A plurality of sensors for measuring voltage, current or temperature at the input or output of each of the power supply and the load; A plurality of relays connected to the input or output unit of each of the power supply units and the input unit of a part of the load and connected to the power supply unit to receive an on / off control command to perform an on / off operation, And a controller for controlling the sensor and the relay.

In a preferred embodiment of the present invention, the controller includes an ID manager and a resource allocator, wherein the ID manager manages IDs of a power supply, a relay, a sensor and a load, A priority calculation unit for calculating a priority for controlling QoS of a control signal and a received signal, and a priority calculation unit for calculating a priority of a communication resource according to the priority, And a resource allocation unit for allocating resources.

In a preferred embodiment of the present invention, the system further comprises an administrator's smart terminal for sending a manual control signal to the controller or receiving information about the diagnostic result or information about the measurement result from the controller .

In the diagnostic and remote control method using the dummy load according to the present invention, the controller sends a control signal for activating the dummy load of the power supply device to be diagnosed to the power supply communication module of the power supply device; The dummy load is switched to the on state according to the control signal and the dummy load consumes power for a predetermined time; Wherein the sensor of the power supply unit measures the output power and the output power variation of the power supply output unit and sends information on the measurement result to the controller; The controller diagnoses the state of the power supply based on information received from a sensor of the power supply.

In a preferred embodiment of the present invention, the control signal includes information on dummy load operation time or dummy load power consumption.

According to a preferred embodiment of the present invention, the current value of the dummy load is changed when the output of the power supply device is a constant voltage, and the voltage of the dummy load is changed when the output of the power supply device is a constant current.

In one preferred embodiment of the present invention, the controller diagnoses the state of the power supply to any one of safety, warning, and danger levels, wherein the output power variation amount is determined based on the power consumption of the dummy load Diagnose as a safety stage when within 1 error range; Diagnosing a warning step when the output power variation is out of a first error range based on consumed power of the dummy load and is within a second predetermined error range; And diagnoses the battery as a dangerous phase when the output power change amount deviates from the first error range and the second error range based on the consumed power of the dummy load.

In a preferred embodiment of the present invention, when the controller diagnoses the state of the power supply apparatus as a dangerous level, the controller sends an off control signal to the relay in the input unit or the output unit of the power supply apparatus to turn off the relay .

In a preferred embodiment of the present invention, when the controller diagnoses the state of the power supply as a safety step, the controller sends a control signal to turn on the power supply, or at least one And sends a control signal for activating the load of the off state or the idle state.

In a preferred embodiment of the present invention, when the controller diagnoses the state of the power supply as a warning step, the controller for measuring the voltage, current or temperature of the power supply includes a measurement command corresponding to the warning step And a control signal for requesting the control signal or the measurement information.

In a preferred embodiment of the present invention, the controller determines the state of a specific device, which is a target measured by the sensor, based on information on the voltage, current, or temperature of the power supply device or the load received from the sensor, If the measured value of the sensor is within a predetermined first error range from the reference value, it is determined as a safety step; Determining that the measurement value of the sensor is a warning step when the measurement value is out of the first error range from the reference value and is within a predetermined second error range; And determining that the measured value of the sensor is in a dangerous phase when the measured value deviates from the reference value by the first error range and the second error range.

As another embodiment of the diagnosis and remote control method using the dummy load according to the present invention, when the controller of the system includes a resource allocation device including an information input unit, a priority calculation unit, and a resource allocation unit and an ID management unit The information input unit receives the diagnostic information of the controller and the identification information of the diagnostic target device; The priority calculation unit calculates a priority for the control signal to be sent by the controller and the reception information to be received by the controller based on the diagnosis information and the identification information; And the resource allocation unit allocates communication resources for each control signal and reception information according to the priority order.

The present invention provides a system for preliminary diagnosis, real-time diagnosis, and remote control of a power supply using a dummy load, so that it can be used to stably supply a constant voltage to loads such as electronic products and lighting systems in poor power quality It is possible to prevent abnormal operation or breakage of power supply devices such as automatic voltage regulator and SMPS.

The present invention enables the safe use of the power supply device and the load, the maintenance of constant performance, and the extension of the product life through smooth remote control and manual control of the manager.

1 is a block diagram showing an automatic voltage regulator control system for power supply and load protection.
2 is an SMPS including a dummy rod according to the present invention.
3 is an SMPS in which a dummy rod according to the present invention is coupled.
FIG. 4 is a diagram showing a controller, a resource allocation device, a dummy load, and a smart terminal of a sensor, a relay, and an administrator included in each electronic device according to the present invention.
5 is a schematic configuration diagram of a resource allocation apparatus according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings illustrate only the essential features for the sake of clarity of the invention and are not to be construed as limiting the drawings.

The diagnosis and remote control system using the dummy load and the method according to the present invention will be described with reference to FIGS. 1 to 5 as follows.

1, a system including a diagnosis and remote control apparatus using a dummy load according to the present invention includes an automatic voltage regulator (AVR) 110 for converting power having an unstable voltage into power having a predetermined range of voltages, A SMPS 130, 135 that supplies a constant power to at least one load 140, a relay in the input and output of each of the automatic voltage regulator and SMPS, a controller 120, And a smart terminal 150. The automatic voltage regulator, SMPS, and load include sensors that sense voltage, current, or temperature at each input and output.

The automatic voltage regulator 110 converts an input current having an unstable voltage into a current having a voltage within a certain range and sends power to at least one SMPS within the allowable power. The SMPS powers at least one load within the allowable power. If the power consumed by the load connected to one SMPS exceeds the capacity of the SMPS, it will cause the failure and damage of the SMPS and the automatic voltage regulator, resulting in a series failure and damage of the load connected to the SMPS and the automatic voltage regulator. In order to prevent this in advance, the relay is connected to the input and output parts of the automatic voltage regulator and the SMPS, respectively, so that when the SMPS and the automatic voltage regulator malfunction or the power output exceeds the limit capacity, Protects automatic voltage regulator, SMPS and load.

The controller 120 receives the measurement values from the sensors that measure voltage, current, and temperature at the automatic voltage regulator, the SMPS, and the input and output of each of the loads, receives the diagnostic value using the dummy load installed in the SMPS, And sends the monitored contents to the smart terminal 150 of the user or manager. The controller 120 sends a signal for controlling on / off of the relay to the relays based on the information obtained from the monitoring and controls the relays, have. The administrator can grasp the normal state, the operation state and the automatic control state of the power supply device and the load through the smart terminal 150, or send a manual control signal to the controller 120 as needed to operate the manual control instead of the automatic control have. The administrator can set or reset the input / output capacity of the automatic voltage regulator and the SMPS input to the controller through the smart terminal 150.

The load may include a dimming control device when the load is an illumination device or a light application device such as an LED lighting device, and when the dimming control device is not included, a relay for turning on / Lt; / RTI > The controller 120 may control the dimming control device and the relay. The dimming control device has a function of adjusting the power consumption of the lighting device by adjusting the brightness of the lighting device.

The dummy load may be installed inside the SMPS as shown in FIG. 2, or may be coupled to the SMPS as shown in FIG. 3 to diagnose the SMPS or indirectly diagnose the automatic voltage regulator. The dummy load is very small in power consumption compared to other general loads and is turned off when no diagnosis is made. The SMPS and automatic voltage regulator are diagnosed by temporary operation during diagnosis. For example, the dummy load is designed to consume less than one-tenth of the normal load power consumption and only operates for a short period of time to diagnose the performance of the SMPS. Applications that use the dummy load to diagnose the performance of the SMPS and automatic voltage regulator and to protect the SMPS, automatic voltage regulator, and load can be categorized as follows.

First, before turning on at least one load of the load system 140 connected to the SMPS 130, the dummy load 131 is turned on for a predetermined period of time to preliminarily diagnose whether the automatic voltage device and the SMPS are operating normally, State to check the power consumption of the dummy load and diagnose whether the SMPS and the automatic voltage regulator detect a change in output power due to dummy load activation. At this time, depending on the type of SMPS, when the output of the SMPS is a constant voltage, the amount of power change is measured by varying the current of the dummy load. When the output of the SMPS is a constant current, the voltage of the dummy load is varied to observe the power variation. If the output of the SMPS 130 is a constant voltage of 100 V, a diagnosis is made by allowing an error of 5%, and a current of 0.1 A is supplied to the dummy load 131 to diagnose whether the power detection amount of the SMPS is within the range of 9.5 W to 10.5 W, It is diagnosed whether or not the electric power variation amount is detected within the error range by changing the electric current value flowing in the load. If the detected electric power variation amount is within the error range, it is determined that the automatic voltage device and the SMPS normally operate and the load is activated.

Second, during the operation of the load system 140, the dummy load 131 is operated for a certain period of time to diagnose whether or not the change amount of the power of the SMPS 130 is sensed. At this time, depending on the type of SMPS, when the output of the SMPS is a constant voltage, the amount of power change is measured by varying the current of the dummy load. When the output of the SMPS is a constant current, the voltage of the dummy load is varied to observe the power variation. If the output of the SMPS 130 is a constant voltage of 100 V, the following two types of control procedures are performed according to the observed power variation when a current of 0.1 A is passed through the dummy load 131 by making an error of 5% Follow.

(1) If the power detection amount of the SMPS is 9.0 W or more and less than 9.5 W or 10.5 W or more and 11 W or less, the first warning indication and the observation value are sent to the controller 120, and the controller reports to the manager's smart terminal; (2) If the power sensing level of the SMPS is less than 9.0 W or greater than 11 W, a second warning indication is sent to the controller and the controller is connected to the relay 52 connected to the input of the SMPS 130 or the relay 51 connected to the input of the automatic voltage regulator, .

Thirdly, when at least one load, which is part of the load system 140 connected to the SMPS 130, is to be operated in an off or idle state during the operation of the load, the SMPS 130 and the automatic voltage The dummy load 131 is operated for a predetermined time to diagnose whether the regulator 110 operates stably. At this time, depending on the type of SMPS, when the output of the SMPS is a constant voltage, the amount of power change is measured by varying the current of the dummy load. When the output of the SMPS is a constant current, the voltage of the dummy load is varied to observe the power variation. If the output of the SMPS 130 is a constant voltage of 100 V, a diagnosis is made by allowing an error of 5%, and a current of 0.1 A is supplied to the dummy load 131 to diagnose whether the power detection amount of the SMPS is within the range of 9.5 W to 10.5 W, The automatic voltage device 110, the SMPS 130, and the active load operate normally when the detected power variation amount is within the error range by diagnosing whether the power variation amount is detected within the error range by varying the electric current value flowing through the load And activates the load for further operation.

As shown in FIG. 4, the controller 120 transmits and receives information through a power communication module of at least one power supply device, a plurality of relays, a plurality of sensors, and at least one smart terminal by wire or wirelessly. The smart terminal 150 and the controller 120 typically communicate wirelessly.

The controller 120 may turn on or off the corresponding relay of the relay 70 when turning off the automatic voltage regulator or the SMPS to turn it off or when the automatic voltage regulator or the SMPS in the off state is to be returned to the on state, And sends a control signal. The controller periodically receives the voltage, current, and temperature information from the automatic voltage regulator, the SMPS, and the sensor 71 mounted on each of the loads, or receives the voltage, current, and temperature information in a period designated by the smart terminal 150 by the administrator. The controller receives diagnostic results from each SMPS 72 using the dummy load. Each of the sensor 71 and the SMPS 72 has a communication module for converting information to be sent to the controller 120 into data of a format in which communication is possible. Each relay 70 includes a data receiving module capable of receiving a control signal. The controller can send information indicating the diagnosis result, the warning signal, the danger signal, and the control status obtained using the voltage, current, temperature, and dummy load received from the sensor 71 and the SMPS 72 to the smart terminal 150 And receive the manual control signal from the smart terminal 150. [ The administrator may send a manual control signal to the controller 120 or receive information sent by the controller 120 to the smart terminal 150. The controller may send a control signal to some load 140 as needed, and may send the control signal to a sensor mounted within the load.

The controller 120 includes an ID manager for managing the IDs of the relays 70, the sensors 71, the SMPSs 72, and the loads, and stores communication resources for transmission and reception between the controller and other devices and devices And a resource allocation device 121 for allocating resources.

The resource allocation apparatus 121 includes the information input unit 123, the priority calculation unit 125, and the resource allocation unit 127 as shown in FIG. 5, and performs the following contents to guarantee the QoS of the measurement data and control signals do.

The information input unit 123 receives information necessary for calculating the priority of resource allocation. The information required for calculating the priority is part or all of the voltage change measured from the automatic voltage regulator, the SMPS, the voltage, current, temperature, and the dummy load of the SMPS transmitted from the load sensor.

On the other hand, the information input for priority calculation can be replaced with the following section information to reduce the amount of information input. The SMPS has different thresholds of power variation indicating the performance risk of the SMPS for each specified output voltage (or output current), and different voltage, current, and temperature thresholds indicating the performance risk of each of the automatic voltage regulator, SMPS, and load. The threshold value for each observation value is set to four, and the threshold values for the voltage, current, temperature, and power variation amount are set as the first threshold value, the second threshold value, the third threshold value, and the fourth threshold value, The first threshold value is a value of Equation 1 which is the upper limit of the normal range, the second threshold value is a value of the Equation 2 which is the lower limit of the normal range, and the third threshold value and the fourth threshold value are expressed by Equations 3 and 4, respectively.

If the observation value is less than or equal to the first threshold value and equal to or greater than the second threshold value, the section-based information is information that combines '0', which is an indication that the state of the device or device is safe, Lt; / RTI > If the observed value is in a range greater than the first threshold and less than or equal to the third threshold, or if the observed value is in a range less than the second threshold and greater than or equal to the fourth threshold, Quot; 1 " which is an indication that the device is in the step; If the observed value is in a range larger than the third threshold value or smaller than the fourth threshold value, '2', which is an indication that the status of the device or the device is in the dangerous phase, is determined as information combined with the ID of the device or the device. The '0', '1' and '2' may be replaced by other identification marks. The first to fourth threshold values may be adjusted to two or three threshold values depending on the type of the observation value, and the definition of the threshold value may also be changed.

The priority calculation unit 125 calculates the priority of the communication resource allocation and calculates the following in consideration of the importance and performance state of the device or the device to be protected through the control by the controller 120 as follows. The communication resource for sending the control signal to the relay 51 located at the input portion of the automatic voltage regulator 110 has the highest value when the position of the sensor that senses the observed value in the dangerous level is the input portion of the automatic voltage regulator 110 . The relay located at the input stage and the output stage of the device at the dangerous level and the relay positioned at the output of the automatic voltage regulator are higher than those of other devices and devices, The relay located at the input of the SMPS, the relay located at the output of the SMPS, and the relay located at the input of the load.

Relays located at the input (or output) of the SMPS in this critical state are given higher priority to the relays located at the inputs of the SMPS with high output power or a large number of connected loads in operation.

The relay located at the input and output of the device and the device in the above critical stage, the sensor detecting the automatic voltage regulator in the next warning stage, the SMPS in the warning phase, the SMPS sensor in the warning phase, , The devices in the safety stage and the sensors of the devices.

The SMPS sensors having a high output power amount or a large number of connected loads in operation have a higher priority among the SMPS sensors in the warning step. Among the sensors of the device and the device in the safety stage, priority is given in the order of the automatic voltage regulator, the SMPS, and the sensor of the load.

The sensors of the SMPS having the high output power amount of the SMPS in the safety stage or the number of the connected loads in operation have the higher priority. On the other hand, the manager can request monitoring information received from the controller through the smart terminal to request specific control signals or specific device and device information, and the priority of communication resource allocation of the controller can be changed at this time.

The resource assignment unit 127 allocates communication resources in accordance with the priority calculated by the priority calculation unit 125 and allocates communication resources in consideration of the amount of data, by allocating wireless communication resources or wired communication resources.

110: Automatic voltage regulator 130: SMPS
120: controller 150: smart terminal
131: Dummy load 121: Resource allocation device

Claims (12)

A dummy load including a switch installed at an output of the power supply for diagnosing a sensing function for an output power variation of the power supply;
A power communication module for receiving a diagnostic command to be performed by the dummy load or transmitting diagnosis result information of the dummy load;
A plurality of sensors for measuring voltage, current or temperature at the input or output of each of the power supply and the load;
A plurality of relays connected to the input or output of each of the power supply units and the input of a part of the load to perform an on / off operation by receiving the on / off control command,
And a controller for controlling the power communication module, the sensor and the relay through wired communication or wireless communication,
Wherein the dummy load is designed to have a smaller power consumption than the load and is only temporarily activated for diagnosis. The method according to claim 1,
The controller includes an ID manager and a resource allocation device,
The ID management unit manages the IDs of power supply devices, relays, sensors, and loads,
Wherein the resource allocation apparatus comprises: an information input unit for receiving information necessary for calculating a priority of a resource allocation in order to assign a control signal and a communication resource to a reception signal;
A priority calculating unit for calculating a priority for QoS control of the control signal and the received signal;
And a resource allocation unit for allocating communication resources according to the priority order. The method according to claim 1,
Wherein the system further comprises a smart terminal of an administrator for sending a control signal to the controller or receiving information about a diagnostic result or measurement result from the controller. system. 4. A system according to any one of claims 1 to 3,
The controller sends a control signal to the power supply communication module of the power supply to activate the dummy load of the power supply to be diagnosed;
The dummy load is switched to the on state according to the control signal and the dummy load consumes power for a predetermined time;
Wherein the sensor of the power supply unit measures the output power and the output power variation of the power supply output unit and sends information on the measurement result to the controller;
Wherein the controller diagnoses the status of the power supply based on information received from a sensor of the power supply. 5. The method of claim 4,
Wherein the current value of the dummy load is changed when the output of the power supply device is a constant voltage and the voltage of the dummy load is changed when the output of the power supply device is a constant current. 5. The method of claim 4,
Wherein the controller diagnoses the state of the power supply to one of safety, warning, and danger levels,
Diagnose a safety stage when the output power variation is within a predetermined first error range based on the power consumption of the dummy load;
Diagnosing a warning step when the output power variation is out of a first error range based on consumed power of the dummy load and is within a second predetermined error range;
And diagnosing the dummy load as a dangerous phase when the output power variation amount deviates from a first error range and a second error range based on consumed power of the dummy load. The method according to claim 6,
Wherein the controller turns off the relay in the input unit or the output unit of the power supply unit when the status of the power supply unit is diagnosed as a dangerous level. . 5. The method of claim 4,
Wherein the control signal includes information on a dummy load operation time or a dummy load power consumption amount. The method according to claim 6,
The controller sends a control signal for activating the power supply or a control signal for activating at least one load connected to the power supply when the controller diagnoses the state of the power supply as a safety step And sending a control signal for sending or activating an additional load in the off or idle state. The method according to claim 6,
Wherein the controller requests a control signal or measurement information including a measurement command corresponding to a warning step to a sensor that measures a voltage, a current, or a temperature of the power supply device when the controller diagnoses the state of the power supply device as a warning step Wherein the dummy load is used to diagnose and remotely control the vehicle. 5. The method of claim 4,
The controller determines the state of the specific device, which is the object measured by the sensor, based on the information on the voltage, current, or temperature of the power supply device or the load received from the sensor as one of safety, warning,
If the measured value of the sensor is within a predetermined first error range from the reference value, determining that it is a safety step;
Determining that the measurement value of the sensor is a warning step when the measurement value is out of the first error range from the reference value and is within a predetermined second error range;
And determining that the measured value of the sensor is in a dangerous phase when the measured value of the sensor deviates from the first error range and the second error range from the reference value. Using the system of claim 2,
The information input unit receives the diagnostic information of the controller and the identification information of the device to be diagnosed;
The priority calculation unit calculates a priority for the control signal to be sent by the controller and the reception information to be received by the controller based on the diagnosis information and the identification information;
And the resource allocation unit allocates communication resources for each control signal and reception information according to the priority order.

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