KR100684599B1 - Uninterruptible motor control system - Google Patents

Abstract

An uninterruptible motor control system is provided to be immediately converted into an emergency power mode in case of electricity interruption by checking a normal operating state of an emergency power unit periodically in a normal state. In an uninterruptible motor control system, a power supply(100) receives electric power and outputs stabilized power by filtering electromagnetic wave obstacles of the received power. A battery(56) stores DC power. A PLC(Programmable Logic Controller) measure the electric power, a frequency, a temperature, a humidity, and a gas amount. An uninterruptible power unit(31) supervises an electric power state of the input power by being connected with the power supply(100), and has a power measurement unit(51), an inverter unit(52), a converter unit(55), an emergency power unit(54), and a signal sensing unit(53). A calculation control unit(32) controls a power supply state by being connected with the uninterruptible power unit(31), and has a micom calculation unit(58), a load level detection unit(59), and a load control unit(60). A host unit(57) is connected with the micom calculation unit(58), and transmits a notice message in wire or wirelessly in case of disorder generation in every unit. A key pad allows an operator to control function setting, monitoring, and a setting value. An LCD(Liquid Crystal Display) window(61) displays various states and a menu when setting functions.

Description

Uninterruptible Motor Control System

1 is a block diagram of an uninterruptible motor power control apparatus showing an embodiment according to the present invention.

2 is a block diagram of an uninterruptible motor power control apparatus according to the present invention.

3 is a simplified circuit diagram of an uninterruptible motor power control apparatus according to the present invention.

<Code Description of Main Parts of Drawing>

31: uninterruptible power supply 32: operation control

51: power measurement unit 52: inverter unit

53: signal sensing unit 54: emergency power unit

55 converter portion 56 storage battery

57: host unit 58: microcomputer operation unit

59: load level detection unit 60: load control unit

61: LCD window

The present invention relates to a power control device, and more particularly, to stabilize electricity of a KEPCO power supply and to charge electricity in a mounted battery during normal operation, and to supply emergency power from a storage battery during KEPCO power failure, and to compare power, frequency, temperature, and humidity. It relates to an uninterruptible motor power control device characterized by measuring the pressure, etc. with a PLC to match the static level of the load, and transmits the message to the user when an abnormality occurs in the device.

In general, uninterruptible power supply system is the amount of money and time that can occur due to the system stops or data is lost by continuously supplying constant power to the electronic device uninterrupted even if the power supply of the system in use is broken or outage. It is an important power equipment to prevent the loss.

In the related art, the administrator directly manages the operation control of the load connected to the uninterruptible power supply and the environment regarding temperature, humidity, and pressure as described above, and directly manages the uninterruptible power supply and the load accordingly. It took time and manpower, and there was a problem that it could not cope quickly and accurately in case of failure of the uninterruptible power supply equipment, causing huge economic loss.

An object of the present invention devised to solve the above problems is to stabilize the normal KEPCO power and to charge the mounted battery and to supply emergency power to the battery at the time of KEPCO, power, frequency, temperature, humidity and gas amount It is to provide an uninterruptible motor power control device that can measure static electricity by measuring it with PLC and transmit the message to the user in case of abnormality of the device.

Uninterruptible motor power control apparatus according to the present invention for achieving the above object,

A power supply configured to receive stable electric power and filter out electromagnetic interference of an input power source to output stable power;

A storage battery for storing a DC power source;

A PLC for measuring electric power, frequency, temperature and humidity, and gas amount;

A power measurement unit that is connected to the power supply and monitors the power state of the input power, filters noise and harmonics, and measures and outputs high-quality power; An inverter unit converting the stored power of the battery into an alternating current and supplying the stored power to the alternating current; An uninterruptible power supply unit comprising a signal sensing unit transmitting and receiving a fixed frequency to the emergency power unit at regular intervals to check the normal operation of the emergency power unit;

The power supply is connected to the uninterruptible power supply to control the power supply state, detects the abnormal power generated from the load side and the uninterruptible power supply, and determines the abnormality. A microcomputer operator for controlling and controlling the load control unit; and a load level detector for measuring the reference level power output from the power supply and power, overload, frequency, temperature, humidity, and pressure levels which are output from the power supply and the measured values output from the PLC. And a load control unit which is connected to the load level detection unit and cancels noise and surge, which are differences between the reference level power of the power supply and each measured amount of energy of the PLC, and adjusts them to a constant level. Wow;

A host unit connected to the microcomputer calculating unit to transmit an abnormal occurrence notification message through a wired or wireless connection when the abnormality occurs in each unit;

A keypad for operating by a driver for various function setting and monitoring control and set value control; And

And an LCD window for displaying a menu when setting various functions and functions.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an uninterruptible motor power control apparatus showing an embodiment according to the present invention, Figure 2 is a block diagram of the uninterruptible motor power control apparatus according to the present invention, Figure 3 is an uninterruptible motor power control apparatus according to the present invention. Is a simplified circuit diagram.

1 to 3, the uninterruptible motor power control apparatus includes a power supply for receiving electromagnetic power and filtering electromagnetic interference of an input power to output stable power, and a storage battery 56 for storing DC power. Not shown) to measure the power, frequency, temperature, humidity and gas volume.

The power measuring unit 51 compares and measures the output of the power supply 100 and the measured value of the PLC, monitors the power state, and outputs high quality power by filtering out noise and high frequency to remove the difference value.

The inverter unit 52 receives the output value of the power measuring unit 51 at the normal time and converts the DC power into the DC power. In the case of power failure, the inverter unit 55 controls the converter unit 55 through the emergency power unit 54 to convert the power to AC power. In this case, the power stored in the storage battery 56 is used as an emergency power source.

The signal sensing unit 53 transmits and receives a fixed frequency to the emergency power unit 54 at regular intervals to check the normal operation of the emergency power unit 54.

The uninterruptible power supply unit 31 outputs the reference level power to the load side, and adjusts it to the constant level in the inverter unit 52 and charges and discharges the battery 56 of the emergency power unit 54. In this case, the signal sensing unit 53 is connected between the inverter unit 52 and the emergency power unit 54 to check the emergency power unit 54 at regular intervals. In addition, when the emergency power unit 54 is operated due to a power failure or an overload, the inverter unit 52 and the signal sensing unit 53 are switched to a standby state, and the internal storage battery 56 of the emergency power unit 54 is turned on. It will develop and drive. At this time, the signal sensing unit 53 checks the electrostatic power when the voltage discharged to the storage battery 56 to 85% of the rated voltage by the emergency power unit 54 operation.

The microcomputer operation unit 58 receives the outputs of the inverter unit 52 and the emergency power unit 54 to determine the selection of the keypad to control the power supply state, and displays the result value on the LCD window 61 and displays each result. Checking and controlling by detecting and detecting negative abnormality occurrence. That is, after detecting abnormality generated by the KEPCO power supplied to the load side and the load side and the uninterruptible power supply unit 31 and determining whether there is an abnormality, the collected information is inspected and controlled in the form of multi-frequency data. At this time, the microcomputer operation unit 58 transmits an abnormality occurrence to the user through the host unit 57. In addition, the series of processes are softwareized to provide a highly efficient and high-performance interface.

The load level detector 59 controls the function of an automatic voltage regulator (AVR) that matches the measured output voltage with the reference output voltage. The voltage level and output current are obtained to obtain responsiveness and stability to the load. Perform the compensation control function. In addition, the load level detection unit 59 detects the input voltage and the input current, the output voltage and the output current, and performs calculation processing to match the set output voltage and the output current. At this time, the load control unit 60 removes noise and surge, which are the difference between the reference level power of the power supply and the respective amounts of energy measured by the PLC, and adjusts them to a constant level.

The host unit 57 transmits an error occurrence announcement to the wired or wireless unit when an error occurs in each unit. At this time, the keypad (not shown) is operated by the driver for various function setting, monitoring control, set value control, etc., and the status display and menu display at the time of function setting are performed by the keypad.

Referring to the operation and effects of the present invention configured as described above are as follows.

The present invention performs an AVR function simultaneously with a function as an uninterruptible motor power control device. The interface function control is softwareized to control power with high efficiency and high function. In order to maximize the efficiency at the available line voltage, the inverter unit 52 and the emergency power unit 54 controls the output voltage to a constant voltage while controlling the buffer voltage between the output and the input so that the output power is supplied from the line. . The control function is software-configured and various parameters related to the device are set and stored in the keypad.

First, the KEPCO is applied to the power supply to convert the input power and output the reference level power.

In this case, the reference level power and the reference level power are applied to pass the power measurement unit 51 to amplify the noise and surge to compare the measured values of the PLC to monitor the power state, and to measure the noise and The high frequency is filtered to remove the difference, resulting in high quality power output.

In this case, the normal power is output through the microcomputer calculation unit 58, and some power is distributed to charge power to the storage battery 56 of the emergency power unit, and the emergency power unit 54 in case of power failure or overload. Will be activated. At this time, the signal sensing unit 53 checks the normal operating states of the inverter unit 52 and the emergency power unit 54 at regular intervals.

Here, the output of the inverter unit 52 and the emergency power unit 54 is applied to determine the selection of the keypad to control the power supply state, display the result value on the LCD window 61, and detect abnormal occurrence of each unit. Checking and control to determine whether and. At this time, the microcomputer calculation unit 58 transmits the abnormal occurrence to the user through the host unit 57. The above abnormality refers to power, overload, frequency, temperature and humidity and gas amount. In addition, the series of processes are softwareized to provide a highly efficient and high-performance interface.

Here, the function of the automatic voltage regulator (AVR) to match the output voltage and the reference output voltage of the microcomputer operator 58, the voltage control and output current to obtain a response and stability to the load The compensation control function is performed to check the data in the multi-frequency method. At this time, the load level detector 59 detects an input voltage and an input current, an output voltage and an output current, and performs calculation processing to match the set output voltage and output current. Also, by applying the reference level power and the reference level power, the difference value between the noise and the surge is eliminated, and the positive level is adjusted to output the load to the load side.

In addition, the charging of the storage battery 56 performs a floating charge for charging up to a general floating charging voltage, and even charging for charging up to the maximum charging voltage at the time of initial installation or charging after being discharged to the battery low voltage. Limited to maximum charging current. If the charging current reaches 10% or less of the maximum charging current value during even charging, it enters the floating charging. The control of the charging current calculates the effective current based on the difference between the input current and the output current to detect the charging current of the battery 56, limits the charging current to the maximum charging current value, and reaches the time of full charge. Is reduced, and the charge current responsiveness is determined by the charge control gain. In the temperature compensation of the even charging voltage, if the temperature falls below room temperature, the charging voltage is increased, and if the temperature rises above the room temperature, the charging voltage is lowered. Temperature compensation at temperatures higher than room temperature uses positive compensation, and compensation at low temperatures uses negative compensation.

Here, various setting values are set for storing various setting values by menu selection of a keypad. Then, as a selection function, it is possible to select whether the operating frequency of the system is 60Hz or 50Hz, and when the voltage is discharged to the storage battery 56 to 85% of the rated voltage by the emergency power unit 54 operation, the operation to check the electrostatic power. Choose your method.

Here, the buzzer sounds when the emergency power unit 54 is operated. When the alarm silent switch of the keypad is pressed, the buzzer does not sound and the buzzer sounds when the switch is pressed again.

Here, the low voltage state of the storage battery 56, overcurrent, overload, abnormality of the storage battery 56, bypass overcurrent, etc. are controlled as a protection function.

When the overcurrent is generated in the inverter unit 52 while the output current continues to exceed the load state by 300% or more, the signal sensing unit 53 protects the inverter unit 52. The unit 52 is blocked and the emergency power unit 54 is operated.

The overload is to protect the inverter unit 52 from overload. If the output current is greater than the accumulated amount up to 1 minute due to the overload set when the rated current or more is operated, the overload is recognized as an overload.

When the voltage is discharged to the storage battery 56 of the emergency power unit 54 to 85% of the rated voltage, an abnormal signal is generated and converted into electrostatic power by the signal sensing unit 53. At this time, the microcomputer calculation unit 58 simultaneously transmits a warning message "battery discharge" which is an error message and a dial tone to the user through the host unit 57.

Bypass overcurrent turns off the bypass switch to protect the bypass switch due to an output short-circuit or an abnormality when operating on electrostatic power. The reference value of the abnormal current is an overcurrent value.

Initialization functions include fault initialization, parameter initialization, and device initialization. Fault initialization removes past fault records and prepares them for readiness. Parameter initialization sets all variables or selection functions to their default values. Device initialization restarts the device.

When the keypad, the LCD window 61, and the host unit 57 are configured as independent controllers, the input / output controller, which is an 8-bit microcontroller communicating with the microprocessor, may be further configured.

The LCD window 61, the first line shows the overall situation of the power control device, the second line shows various internal variables of the power control device. It displays battery voltage capacity, battery voltage, battery current, output voltage, output current, input voltage, input current, output frequency, temperature and humidity, and gas volume.The third line shows the status of power control device and the number of power failure, date and time, etc. The display selection allows the value to be read using the up and down keys on the keypad.

The "Menu ESC" of the keypad enters or exits the menu and controls the shifting of the variable, and the up and down keys change the type and display variables of the variable value, and the alarm is on or off. To change the status, "SET RUN STP", the menu is selected or the parameters are set, the system is stopped and operated, and the system is restarted in the event of a fault.

The automatic power supply device of the present invention by the microcomputer operation unit 58 performing the above functions, the inverter operation and emergency power operation switching control, looking at the state as follows.

In normal operation, the reference level power of the power supply is output to the load side, and the inverter unit 52 adjusts to a constant level, and charges and discharges the battery 56 of the emergency power unit 54. At this time, the signal sensing unit 53 requests the inverter unit 52 to charge and discharge the battery 56 and checks the normal operation of the emergency power unit 54 at a predetermined cycle.

In the operation of the KEPCO, the inverter unit 52 is switched to the standby state and generates and operates the internal storage battery 56 of the emergency power unit. At this time, the signal sensing unit 53 checks the inverter unit 52 in the standby state at regular intervals and checks whether the reference level power is applied. In addition, the microcomputer calculation unit 58 transmits a warning message and a dial tone of “KEPCO”, which are abnormal occurrences, to the user through the host unit 57.

In the emergency power supply, the inverter unit 52 and the signal sensing unit 53 are switched to a standby state and generate and operate the internal storage battery 56 of the emergency power unit. At this time, the microcomputer calculation unit 58 transmits a warning message and an alarm tone, “Emergency power supply state”, which is an abnormality, to the user through the host unit 57.

Bypass is to control the bypass function in which the input power is directly transmitted to the load side without controlling the uninterruptible power supply unit 31.

The emergency bypass is provided with a maintenance bypass switch (MBS) in parallel with the emergency power unit so that input power is delivered to the load side through the emergency switch, and the SCR is cut off to supply power to the emergency power unit 54. This is to prevent the operation of the emergency power unit 54 in the case of repairing the emergency power unit 54 or other emergency.

Finally, the input power is output to the load side automatically through the emergency power unit 54 path even through the overload or the inverter unit 52 and not through the inverter unit 52. Take precautionary measures against damage. At this time, the microcomputer calculation unit 58 transmits a warning message " overload occurrence " which is an error occurrence message and a dial tone to the user through the host unit 57 at the same time.

As described in detail above, the present invention provides a power control device, which has a function of transmitting a wired / wireless abnormality notification and has an advantage of enabling a faster resumption of the device. In addition, there is an advantage that can be switched to the emergency power supply immediately in case of power failure by checking the normal operating state of the emergency power unit at regular intervals. In addition, it is possible to control the operation of overload by maintaining a constant level to save energy by saving electricity.

Claims (1)

A power supply configured to receive stable electric power and filter out electromagnetic interference of an input power source to output stable power; A storage battery for storing a DC power source; A PLC for measuring power, frequency, temperature, humidity and gas amount; A power measurement unit that monitors the power state of the input power source in connection with the power supply, filters noise and high frequency, and measures and outputs high-quality power; An inverter unit for converting power into a power source, a converter unit for converting the stored power of the battery into alternating current and supplying it again, an emergency power unit converting the battery power mounted in the event of a power outage into AC power and outputting emergency power to a load side; An uninterruptible power supply unit comprising a signal sensing unit transmitting and receiving a fixed frequency to the emergency power unit at regular intervals to check the normal operation of the emergency power unit; The power supply is connected to the uninterruptible power supply to control the power supply state, detects the abnormal power generated from the load side and the uninterruptible power supply, and determines the abnormality. A microcomputer operator for controlling and controlling the load control unit; and a load level detector for measuring the reference level power output from the power supply and power, overload, frequency, temperature, humidity, and pressure levels which are output from the power supply and the measured values output from the PLC. And a load control unit which is connected to the load level detection unit and cancels noise and surge, which are differences between the reference level power of the power supply and each measured amount of energy of the PLC, and adjusts them to a constant level. Wow; A host unit connected to the microcomputer calculating unit to transmit an abnormal occurrence notification message through a wired or wireless connection when the abnormality occurs in each unit; A keypad for operating by a driver for various function setting and monitoring control and set value control; And Uninterruptible motor power control device characterized in that it comprises a; LCD display for displaying the menu when the various status display and function setting.

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