KR100801019B1 - Output voltage control method in a surplus power controller - Google Patents

Abstract

A method for controlling an output voltage in a surplus power controller is provided to control easily and rapidly voltages according to power demand amounts by implementing various operation modes for controlling the voltages. A current time and a set voltage are detected(S202). A current output voltage is detected(S203). The set and output voltages are compared(S204). When the output voltage is higher than the set voltage, a controller outputs a voltage drop signal. Then, an exciting coil is connected to the voltage drop coil of a proportion voltage coil such that an output voltage is dropped. When the output voltage is lower than the set voltage, a controller outputs a voltage increase signal. Then, the exciting coil is connected to the voltage increase coil of the proportion voltage coil such that an output voltage is increased. When the output voltage is equal to the set voltage, the proportion voltage coil is recovered to a natural state.

Description

Output voltage control method in surplus power controller

1 is an overall configuration diagram of a conventional automatic voltage regulator.

2 is an overall configuration diagram of a surplus power controller according to an embodiment of the present invention.

3 is a flowchart illustrating an operation state of the manual mode of the output voltage control method of the surplus power controller according to an embodiment of the present invention.

4 is a flowchart illustrating an operation state of an automatic voltage control mode according to a set voltage in an output voltage control method of a surplus power controller according to an embodiment of the present invention.

FIG. 5 is a flowchart illustrating an operation state of a voltage automatic control mode according to a set voltage for each period of an output voltage control method of a surplus power controller according to an embodiment of the present invention. FIG.

Figure 6 is a graph showing the change in voltage and amount of power supplied by the Korea Electric Power Corporation by time zone.

7 is a graph showing a state in which the output voltage is controlled in accordance with an embodiment of the present invention.

FIG. 8 illustrates an embodiment of the setting and display unit illustrated in FIG. 2. FIG.

FIG. 9 is a table showing various setting states set by the setting unit of FIG. 8; FIG.

10A to 10G are diagrams illustrating a setting state in which the setting state of FIG. 9 is displayed on the setting and display unit of FIG.

11A to 11L are display state diagrams displayed on the setting and display unit according to the setting state of FIG.

<Description of the code used in the main part of the drawing>

101 ~ 103: main winding 104 ~ 106: proportional voltage winding

107-109: excitation winding 200: control means

300: setting and display

The present invention relates to a method of controlling the output voltage of a surplus power controller, and more particularly, to an output voltage control method of a surplus power controller capable of power monitoring, power control and power management of input / output power of general and industrial electricity. will be.

Electricity consumption is increasing significantly every year as the national income increases. In particular, in the summer, due to the load of the air conditioner, power supply and demand is not stable, and systematic power demand management measures are emerging.

Conventionally, by checking the amount of power in real time using the peak power controller, if the amount of power is expected to exceed the preset limit value, that is, the peak, the ventilation and cooling equipment is automatically controlled to shut down for a predetermined time to control power saving. By forcibly stopping the electrical appliance, the user feels uncomfortable, and a low voltage phenomenon caused by excessive power consumption causes a problem of shortening the life of the electrical appliance.

If the power demand is increased during the daytime, when the voltage is boosted and transmitted by the Korea Electric Power Corporation, the power demand decreases during the night time, causing overvoltage to be supplied to the electric product, thereby causing damage to the electric product.

In order to solve such a problem, the present applicant has proposed an automatic voltage regulator for power saver using a voltage variable such as Korean Utility Model Registration No. 411863.

The conventional automatic voltage regulator proposed by the applicant is a product of the same or similar configuration as the surplus power controller of the present invention, it will be known in advance that only the name is changed depending on the intended use.

The conventional automatic voltage regulator proposed by the applicant will be briefly described with reference to FIG. 1.

The conventional automatic voltage regulator has a main winding (L1, L4, L7) connected in series to each phase (A, B, C), and the main winding (L1, L4, L7) of each phase (A, B, C). Excitation windings which variably control the voltages of the main windings L1, L4, L7 according to the proportional voltage of the proportional voltage windings L3, L6, L9 connected in parallel and the proportional voltage windings L3, L6, L9. L2, L5, L8) and the output voltage of each phase (A, B, C) are compared with the preset set voltage, and the stepping motor is operated according to the result, which is proportional by the proportional voltage windings (L3, L6, L9). Control means for controlling the voltage to be stepped up or stepped down (in Fig. 1 is referred to as a 'PCB controller board').

That is, if one phase (for example, A phase) of each phase (A, B, C) is limited and described, when the line voltage supplied by KEPCO is 400V, each phase voltage is 400 / √3 becomes 230V. When the customer's set voltage set by the control means is 220V, the control means drives the stepping motor so that the proportional voltage winding moves in the step-down direction until the output voltage of each phase becomes 220V. When the output voltage of each phase reaches 220V after a predetermined time, the control means stops driving the stepping motor. Accordingly, the output voltage of each phase maintains 220V, which is the set voltage set by the control means.

On the other hand, when the line voltage supplied by KEPCO is 360V, each phase voltage is 360 / √3 to 207V. Since the set voltage of the customer set by the control means is 220V, the control means drives the stepping motor so that the proportional voltage winding is moved in the boosting direction until the output voltage of each phase becomes 220V. When the output voltage of each phase reaches 220V after a predetermined time, the control means stops driving the stepping motor. Accordingly, the output voltage of each phase maintains 220V, which is the set voltage set by the control means.

In addition, if this process is repeated for each phase, the output voltage of each phase is maintained at 220 V, which is the set voltage, and the output voltage of each phase is stabilized.

As such, the conventional automatic voltage regulator presets a voltage level required by the customer, and when the output voltage of each phase (A, B, C) is supplied higher or lower than the set voltage, the stepping motor steps up or down the proportional voltage winding. To keep the output voltage at the set voltage.

The present invention is an improvement on the conventional technology described above, the output of the surplus power controller having the output voltage control by manual operation, the output voltage control for the predetermined target voltage and the output voltage control function for the target voltage for each preset time period Provides a voltage control method.

According to the present invention, the output voltage is controlled by the winding ratio of the main winding to the excitation winding and the proportional voltage winding with respect to the input voltage, and the surplus power includes a control means for controlling the level of the output voltage by adjusting the boost / step-down of the proportional voltage winding. A method for controlling an output voltage of a controller, the method comprising: detecting a current time and detecting a set voltage for each preset period; Detecting an output voltage currently output; Comparing the set voltage with the output voltage; If the output voltage is higher than the set voltage, the step-down signal is sent from the control means, and the excitation winding is connected to the step-down winding of the proportional voltage winding according to the step-down signal sent out to step down the output voltage; If the output voltage is lower than the set voltage, a step-up signal is output from the control means, and the excitation winding is connected to a boost winding of the proportional voltage winding according to the boosted signal to output the voltage up; And if the output voltage is equal to the set voltage, returning the proportional voltage winding to a neutral state.

Here, it is preferable that the set voltage for each period is set according to at least one or more periods of time, month, minute, day of the week, and day / night.

The method may further include indicating that the current mode is a voltage automatic control mode according to a set voltage for each period.

In addition, the operator may directly control the step-up / step-down of the output voltage, and may further include a manual mode performing step of the output voltage is stepped up / down by the control means under the operator's control.

In addition, the method may further include indicating that the current mode is the manual mode.

The method may further include performing a voltage automatic control mode according to a set voltage in which an output voltage is increased / decreased by the control means according to a result of comparing a preset set voltage with a current output voltage.

In addition, if the current output voltage is higher than the set voltage, the step-down signal is sent from the control means, the excitation winding is connected to the step-down winding of the proportional voltage winding in accordance with the step-down signal sent out the output voltage is stepped down; If the current output voltage is lower than the set voltage, a step-up signal is sent from the control means, and the excitation winding is connected to the step-up winding of the proportional voltage winding according to the step-up signal sent out to boost the output voltage; And if the output voltage is equal to the set voltage, returning the proportional voltage winding to a neutral state.

The method may further include indicating that the current mode is a mode for performing the voltage automatic control mode according to the set voltage.

The method may further include generating an alarm signal when the output voltage is higher or lower than the set voltage.

The method may further include a setting step of setting the set voltage for each period.

The method may further include displaying the automatic voltage adjustment for each period in which the set value of the automatic voltage adjustment for each period is displayed.

In addition, the voltage / current / utilization display step of displaying the current value of the power, the effective value of the current and the set amount of power used; An instantaneous power and power factor value display step of displaying instantaneous power and power factor values currently used; An instantaneous, invalid and apparent power display step of displaying instantaneous valid, invalid and apparent power values currently used; An electricity meter display step of displaying the amount of power for each phase; Displaying the maximum current at the time of overcurrent in which the maximum current value of each phase is displayed in an overcurrent state; An automatic / manual voltage display step of displaying whether the voltage adjustment mode is automatic or manual, and displaying a set value; An overcurrent relay display step of displaying a setting state and a set value of the overcurrent; An undervoltage relay display step of displaying a set state and a set value of the undervoltage relay; A temperature relay display step of displaying a set state and a set value of the temperature relay; A date / time display step of displaying a current year, month, day, and time; And it may further comprise at least one or more of the fixed history display step that can determine the failure history of the surplus power controller.

Hereinafter, exemplary embodiment (s) of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the elements of each drawing, it should be noted that the same elements are denoted by the same reference numerals as much as possible even if they are displayed on different drawings. In addition, in the following description there are shown a number of specific details, such as components of the specific circuit, which are provided only to help a more general understanding of the present invention that the present invention may be practiced without these specific details. It is self-evident to those of ordinary knowledge in Esau. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 is an overall configuration diagram of a surplus power controller according to an embodiment of the present invention, Figure 3 is an operation for explaining the operating state of the manual mode of the output voltage control method of the surplus power controller according to an embodiment of the present invention 4 is a flowchart illustrating an operation state of a voltage automatic control mode according to a set voltage in an output voltage control method of a surplus power controller according to an embodiment of the present invention, and FIG. 5 is an embodiment of the present invention. FIG. 6 is a flowchart illustrating an operation state of a voltage automatic control mode according to a set voltage for each period of an output voltage control method of a surplus power controller according to an example. FIG. 7 is a graph showing a state in which the output voltage is controlled according to an embodiment of the present invention, Figure 8 is a setting and table shown in FIG. 9 is a diagram illustrating various setting states set by the setting unit of FIG. 8, and FIGS. 10A to 10G show the setting state of FIG. 9 on the setting and display unit of FIG. 2. 11A to 11L are display state diagrams displayed on the setting and display unit according to the setting state of FIG. 9.

As shown in FIG. 2, the surplus power controller according to an embodiment of the present invention includes main windings 101 to 103 connected in series to each phase A, B, and C, and each phase A, B, and C. FIG. Proportional variable control of the voltage of the main winding (101 ~ 103) according to the proportional voltage winding (104 ~ 106) and the proportional voltage of the proportional voltage winding (104 ~ 106) connected in parallel with respect to the main winding (101 ~ 103) of the Excitation windings 107 to 109.

In addition, the output voltage and the predetermined set voltage are compared for each preset period of each phase (A, B, C), and the stepping motor is operated according to the result, so that the proportional voltage by the proportional voltage windings 104 to 106 increases. Or a setting unit (300) including a control unit (200) for controlling to step down, a setting unit for setting a period and a set voltage, and a display unit for displaying pages and setting results according to various setting modes. (See FIG. 8).

Here, the control means 200 detects the input voltage, the output voltage and the input current of each phase (A, B, C), compares the detected output voltage with a predetermined set voltage and accordingly the stepping motor Configured to control.

In addition, the control means 200 includes a storage medium for storing the set voltage set by the operator and the period information set for performing the automatic control mode for each period. In this case, the storage medium may be any of a conventional storage medium such as a nonvolatile memory or a hard disk.

In addition, the control means 200 and the setting and display unit 300 may be integrated into a single device.

In addition, the main windings 101 to 103 and the excitation windings 107 to 109 are described on the assumption that they are configured in the form of a single winding wound around one core by sharing one core. It is noted that the alternative configuration may be easily modified by those skilled in the art.

In addition, as shown in Figure 9, the surplus power controller according to an embodiment of the present invention includes a setting key (Move key, Editor key, Dec key, Inc key, Reset key) for various settings, each An example of using a key is shown below.

Move key: Cursor moves when page moves or Editor key is pressed

-Inc key: Increase setting value

-Dec key: decreases the set value

-Editor key: to set each page and to complete

-Reset key: Reset to initial screen in each screen

At this time, it is obvious that the above-described embodiment of the use of the setting key can be arbitrarily modified within the scope of the present invention.

In addition, the surplus power controller according to an embodiment of the present invention may set various usage environments as shown in FIG. 9 by using the above setting keys, and the set contents may be set and displayed as shown in FIGS. 10A to 10F. 300 is displayed on the display window.

In addition, the operator may operate the setting key to display the current operating state of the surplus power controller on the display unit.

Here, an example of a current operating state of the surplus power controller displayed on the display window of the setting and display unit 300 is as shown in Figs. 11A to 11L.

That is, the surplus power controller displays a voltage / current / utility display function that displays the effective value of the voltage / current of the power input and the set amount of power used according to the operator's display state setting, and the instantaneous power and power factor value currently used. Instantaneous power / power factor display function to display, active / invalid / apparent power display function to display the instantaneous effective / invalid / apparent power value currently used, electricity meter display function to display the amount of power for each phase, the maximum current value of each phase Maximum current display function for over current, automatic / manual voltage display function for checking the automatic / manual setting status and setting value of voltage adjustment, and automatic voltage adjustment for each period displaying the set value of automatic voltage adjustment for each period Display function, over current relay display function to check setting state and setting value about overcurrent, and setting state and setting value about undervoltage relay The low voltage relay display function that can be checked, the setting status and setting value display function for the thermometer relay that can check the setting status and set value of the temperature relay, and the date to display the current year / month / day / time It includes / time display function and fault history display function to check fault history.

That is, the surplus power controller of the present invention assumes that the operator includes three modes: 1) manual mode, 2) voltage automatic control mode according to the set voltage, and 3) voltage automatic control mode according to the set voltage for each period. Let's explain.

First, as shown in FIG. 3, when the operator sets the surplus power controller to 1) the manual mode, the manipulation and display unit 300 indicates that the surplus power controller is currently in the manual mode (S101), and enters the operator's key. Maintain a waiting state for waiting (S102). At this time, when the operator inputs a predetermined key for boosting or stepping down the output voltage (S103), the control means 200 analyzes whether the input key is a key for boosting or a key for stepping down, Accordingly, the stepping motor is controlled to step up or step down the output voltage of each phase A, B, or C (S104, S105).

That is, when the operator inputs the boost key, the control means 200 sends a boost signal so that the stepping motor connected to each phase (A, B, C) operates in the boosting direction, and accordingly, the excitation winding 107 109 is connected in series to the boost windings of the proportional voltage windings 104 to 106, and the main windings 101 to 103 are output according to the winding ratios of the proportional voltage windings 104 to 107 and the excitation windings 107 to 109. The voltage is boosted and output.

If the operator inputs the step down key, the control means 200 sends out a step down signal so that the stepping motor connected to each phase (A, B, C) operates in the step down direction, and accordingly, the excitation winding 107 109 is connected in series to the step-down windings of the proportional voltage windings 104 to 106, and the main windings 101 to 103 are output according to the winding ratios of the proportional voltage windings 104 to 107 and the excitation windings 107 to 109. The voltage is stepped down and output.

Therefore, according to the operator's operation, the surplus power controller is operated in the manual mode so that the output voltage is boosted or stepped out.

Next, as shown in FIG. 4, when the operator sets the surplus power controller to 2) the voltage automatic control mode according to the set voltage, the operation and display unit 300 displays the surplus power controller automatically according to the current set voltage. The control mode (for example, automatic mode) is displayed (S201), and the control means 200 detects a predetermined set voltage (S202).

In addition, the control means 200 detects the output voltage currently output in each phase (A, B, C) (S203), and compares whether the output voltage is higher than the predetermined set voltage (S204).

Here, if the current output voltage of each phase (A, B, C) is higher than the predetermined set voltage, the control means 200 controls to generate an alarm signal in the setting and display unit 300 (S205), stepping The excitation windings 107 to 109 are operated to output the step-down signals so as to be connected to the step-down windings of the proportional voltage windings 104 to 106 (S206).

Accordingly, the excitation windings 107 to 109 are connected in series to the step-down windings of the proportional voltage windings 104 to 106, and the main windings 101 to 103: the proportional voltage windings 104 to 107 and the excitation windings 107 to 109. According to the winding ratio of), the output voltage is stepped down and output.

Thereafter, the control means 200 returns to step 204 until the output voltage is equal to the preset set voltage, and repeatedly performs the steps after step 204.

If the current output voltage of each phase (A, B, C) is lower than the preset set voltage (S207), the control means 200 controls the setting and display unit 300 to generate an alarm signal (S208). In step S209, the stepping motor is operated to output the boost signal such that the excitation windings 107 to 109 are connected to the boost windings of the proportional voltage windings 104 to 106 (S209).

Accordingly, the excitation windings 107 to 109 are connected in series to the boost windings of the proportional voltage windings 104 to 106, and the main windings 101 to 103: the proportional voltage windings 104 to 107 and the excitation windings 107 to 109. According to the winding ratio of), the output voltage is boosted and output.

Thereafter, the control means 200 returns to step 204 until the output voltage is equal to the preset set voltage, and repeatedly performs the steps after step 204.

Therefore, the surplus power controller may output an output voltage maintained at a predetermined set voltage.

Lastly, as shown in FIG. 5, when the operator sets the surplus power controller to the voltage automatic control mode according to the set voltage for each period, the operation and display unit 300 displays the surplus power controller for the current period. In step (S301), the control means 200 detects the present time and detects a preset set voltage corresponding to the detected present time at the same time. (S302).

In addition, the control means 200 detects the output voltage currently output in each phase (A, B, C) (S303), and compares whether the output voltage is higher than the predetermined set voltage (S304).

Here, if the current output voltage of each phase (A, B, C) is higher than the predetermined set voltage, the control means 200 controls to generate an alarm signal in the setting and display unit 300 (S305), stepping By operating the motor to output the step-down signal so that the excitation windings (107 ~ 109) are connected to the step-down winding of the proportional voltage winding (104 ~ 106) (S306).

Accordingly, the excitation windings 107 to 109 are connected in series to the step-down windings of the proportional voltage windings 104 to 106, and the main windings 101 to 103: the proportional voltage windings 104 to 107 and the excitation windings 107 to 109. According to the winding ratio of), the output voltage is stepped down and output.

Thereafter, the control means 200 checks the current time, redetects the set voltage corresponding to the current time, returns to the above step 302, and then, after the step 302 until the output voltage is equal to the preset set voltage. Perform the steps repeatedly.

If the current output voltage of each phase (A, B, C) is lower than the predetermined set voltage (S307), the control means 200 controls to generate an alarm signal in the setting and display unit 300 (S308). The stepping motor is operated to output a boost signal such that the excitation windings 107 to 109 are connected to the boost windings of the proportional voltage windings 104 to 106 (S309).

Accordingly, the excitation windings 107 to 109 are connected in series to the boost windings of the proportional voltage windings 104 to 106, and the main windings 101 to 103: the proportional voltage windings 104 to 107 and the excitation windings 107 to 109. According to the winding ratio of), the output voltage is boosted and output.

Thereafter, the control means 200 checks the current time, redetects the set voltage corresponding to the current time, returns to the above step 302, and then, after the step 302 until the output voltage is equal to the preset set voltage. Perform the steps repeatedly.

Therefore, the surplus power controller can output the output voltage of the state maintained at the predetermined set voltage for each period.

On the other hand, in the voltage automatic control mode according to the set period by period, the period can be preferably set in units of time, and can be set in minutes, days, days of the week, or day / night units as necessary. This state is well illustrated in FIGS. 6 and 7.

In addition, the operator may input a desired setting value as the various keys of the display and setting unit 300 are operated, and the setting and the current operation state of the surplus power controller may be confirmed by a display window.

As described above, although the specific embodiment (s) have been described in the detailed description of the present invention, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiment (s), but should be defined by the appended claims and equivalents thereof.

The present invention sets the set voltage for each period, and if the output voltage of each phase of the surplus power controller is higher or lower than the preset set voltage, the output voltage is automatically controlled to increase / decrease to the set voltage level so as to output the period. It is easy to manage power, prevent unnecessary power consumption, and prevent malfunction and failure of electric / electronic products due to power shortage during peak time.

In addition, the output voltage can be controlled manually as needed, and various operation modes are provided to set the set voltage and automatically adjust the output voltage, so that the output voltage can be controlled conveniently and quickly according to the power demand. They can flexibly respond to changes in various situations.

In addition, since the period for registering the set voltage can be arbitrarily set, such as time unit, daily unit, minute unit, and the like, stable power supply is possible even in a time zone where the amount of change in electric power demand is large.

In addition, since the operator's setting state and the current operating state of the surplus power controller are displayed for each page, the operator can easily grasp the current operating state, and the management of the surplus power controller is convenient.

Claims (12)

The output voltage is controlled by the ratio of the windings of the main winding to the excitation winding and the proportional winding with respect to the input voltage, and the output of the surplus power controller including a control means for controlling the level of the output voltage by adjusting the step-up / step-down of the proportional voltage winding In the voltage control method: Detecting a current time and detecting a set voltage for each preset period; Detecting an output voltage currently output; Comparing the set voltage with the output voltage; If the output voltage is higher than the set voltage, the step-down signal is sent from the control means, and the excitation winding is connected to the step-down winding of the proportional voltage winding according to the step-down signal sent out to step down the output voltage; If the output voltage is lower than the set voltage, a step-up signal is output from the control means, and the excitation winding is connected to a boost winding of the proportional voltage winding according to the boosted signal to output the voltage up; And And if the output voltage is equal to the set voltage, returning the proportional voltage winding to a neutral state. The method of claim 1, The set voltage for each period is, The method of controlling the output voltage of the surplus power controller, characterized in that the voltage is set according to at least one of the time period, month, minute, day of the week, day / night. The method of claim 1, And indicating that the current mode is a voltage automatic control mode according to the set voltage for each period. The method of claim 1, And performing a manual mode in which the operator directly controls the rising / falling of the output voltage and the output voltage is raised / decreased by the control means according to the control of the operator. The method of claim 4, wherein And indicating that the current mode is a passive mode. The method of claim 1, Comparing the preset set voltage with the current output voltage, and performing an automatic voltage control mode according to the set voltage in which the output voltage is increased / decreased by the control means according to the result. . The method of claim 6, If the current output voltage is higher than the set voltage, the step-down signal is sent from the control means, and the excitation winding is connected to the step-down winding of the proportional voltage winding according to the step-down signal sent out to step down the output voltage; If the output voltage is lower than the set voltage, a step-up signal is output from the control means, and the excitation winding is connected to a boost winding of the proportional voltage winding according to the boosted signal to output the voltage up; And And if the output voltage is equal to the set voltage, returning the proportional voltage winding to a neutral state. The method of claim 6, And indicating that the current mode is a mode for performing a voltage automatic control mode according to a set voltage. The method according to claim 1 or 6, And generating an alarm signal when the output voltage is higher or lower than the set voltage in the comparing step. The method of claim 1, The output voltage control method of the surplus power controller further comprising a setting step of setting the set voltage for each period. The method of claim 1, An output voltage control method of a surplus power controller further comprising a period-by-step automatic voltage adjustment display step of displaying the set value of the automatic voltage adjustment for each period. The method of claim 1, A voltage / current / utilization rate displaying step of displaying an actual value of an input voltage, an effective value of a current and a set amount of power; An instantaneous power and power factor value display step of displaying instantaneous power and power factor values currently used; An instantaneous, invalid and apparent power display step of displaying instantaneous valid, invalid and apparent power values currently used; An electricity meter display step of displaying the amount of power for each phase; Displaying the maximum current at the time of overcurrent in which the maximum current value of each phase is displayed in an overcurrent state; An automatic / manual voltage display step of displaying whether the voltage adjustment mode is automatic or manual, and displaying a set value; An overcurrent relay display step of displaying a setting state and a set value of the overcurrent; An undervoltage relay display step of displaying a set state and a set value of the undervoltage relay; A temperature relay display step of displaying a set state and a set value of the temperature relay; A date / time display step of displaying a current year / month / day / time; And The method of controlling the output voltage of the surplus power controller further comprises at least one or more of the fixed history display step that can determine the failure history of the surplus power controller.

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