KR100649429B1 - Street-light's power saving apparatus controlling voltage-current proportionally - Google Patents

Abstract

The present invention relates to a voltage-current proportional control streetlight power saver, and more specifically, a voltage and current by connecting a decoiled coil wound in series to a street light load in a polarity with a transformer coil functioning as a single winding transformer connected in parallel to an input power source. It is a voltage-current proportional control streetlight power saver that saves power by simultaneously dropping the power.

In the voltage-current proportional control street light power saver according to the present invention, in the voltage-current proportional control street light power saver for lowering the voltage and current of power input from a predetermined power source through an input terminal and supplying it to the street light through the output terminal, the coil is wound around a predetermined core. A transformation coil connected in parallel to the first and second input terminals, and a polarization coil wound on the core in which the transformer coil is wound with respect to the transformer coil, connected in series to a first output terminal at an output terminal based on the transformer coil; A plurality of output taps arranged in a length direction of the coil at one side of the transformer coil to lower and output the voltage output through the transformer coil, and connected in series to a second output terminal and connected to a predetermined output tap among the output taps The first switch to be opened and closed by being connected in parallel with the depolarizing coil and the tap switch being connected in series with the tap switch. A power saver including a second switch to be opened and closed, and closing the first switch and opening the second switch when the potential difference between the first and second output terminals is less than or equal to a set value, and between the first and second output terminals. And a controller for opening the first switch and closing the second switch when the potential difference is greater than or equal to a set value.

Street light

Description

STREET-LIGHT'S POWER SAVING APPARATUS CONTROLLING VOLTAGE-CURRENT PROPORTIONALLY}

1 is a circuit diagram illustrating a state in which a voltage-current proportional control street light power saver is installed in a single-phase power supply according to an embodiment of the present invention.

2 is a circuit diagram showing a state in which the voltage-current proportional control street light power saver is installed in a three-phase power source according to an embodiment of the present invention.

3 is a circuit diagram showing a power saver using a conventional single winding transformer

<Short description of the major reference symbols>

110,210 Voltage-current proportional control street light

Ct transformer coil

Cs polarizing coil

T ₁ to T ₄ output taps

St tap switch

R ₁ a ₁ 1st switch

R ₂ a ₁ 2nd switch

120,220 controller

Sr relay switch

121,221 relay

R ₁ first relay

R ₂ second relay

R ₃ relay 3

R ₂ b ₁ First relay switch

R ₁ b ₁ 2nd relay switch

Sc ₁ 1st selection switch

Sc ₂ 2nd switch

R ₃ a ₁ 3rd relay switch

R ₃ b ₁ 4th relay switch

130,230 Surge Absorber

140240 Voltmeter

The present invention relates to a voltage-current proportional control streetlight power saving device, and more particularly, a transformer coil functioning as a single winding transformer connected in parallel to an input power source and a depolarizing coil wound in a polarity with the transformer coil in series with a street lamp load. The present invention relates to a voltage-current proportional control streetlight power saver that reduces power by simultaneously dropping voltage and current.

Electric power is supplied to homes and businesses with standard voltages of 220V (110V) and 380V, respectively. The Electricity Business Law stipulates that power supplied at standard voltage 220V is supplied within the range of ± 13V (207V to 233V) of standard voltage, and power supplied at standard voltage of 380V is within ± 26V of standard voltage (354V ~ 406V). However, KEPCO is supplying power by increasing the voltage in consideration of the voltage drop during transmission and distribution.

On the other hand, electrical equipment using power is designed to operate normally within the voltage range (198V ~ 242V, 342V ~ 418V) within ± 10% of the standard voltage. Therefore, within the allowable voltage range, there is no problem in the normal operation of the electric equipment. The same is true of street lamps.

A method of saving power by lowering and supplying a voltage of power supplied to a street lamp to a minimum rated voltage using a voltage supply range and an allowable voltage characteristic of an electric device as defined by the Electric Business Act as described above has been used. In particular, this method is very power-saving effect considering the site that is typically supplied at high voltage.

FIG. 3 illustrates a power saving device using a single winding transformer. Referring to the drawings, a conventional power saving device using a single winding transformer has a coil C connected in parallel to the input sides P1 and P2, and in the longitudinal direction of the coil. A plurality of tabs T1 to T4 are arranged, the second switch S2 is connected to the output terminal P3, and the second switch S2 is connected to any one of the predetermined tabs of the tabs T1 to T4. ) Has a configuration connected in parallel to the first switch (S1).

When the power saver using the single winding transformer as described above is applied with the power E, the first switch S1 is closed and the second switch S2 is opened to operate the load L in the initial stage. In this step, the power of the power source E is applied to the load L as it is. When the load L is operated, the first switch S1 is opened and the second switch S2 is closed at the time set by the timer. In this state, since the coil C functions as a single winding transformer, the voltage applied to the load L is lowered, thereby saving power. The voltage applied to the load L is regulated by the taps T1 to T4 and the switch S2.

However, in the conventional power saving device using a single winding transformer, the coil (C) functions as a single winding transformer, thereby lowering the voltage within the allowable voltage to seal the load (L), thereby saving power, so that the current increases as opposed to the voltage drop. As a result, the power saving effect is not great.

In addition, since the power saving device using the conventional single winding transformer has to close the second switch S2 after the first switch S1 is opened in order to prevent a short circuit, supply of power is momentarily stopped when the switch is switched. This has a problem that the street light is not turned on again in the street lamp provided with a light and a ballast.

In the conventional power saving device using a single winding toilet, when the voltage applied to the load L drops below the allowable voltage, when the operation of the load L is not smooth, the power of the power source E is directly applied to the load L. There is a problem that the original state that is applied, that is, the second switch (S2) is opened and the first switch (S1) is not returned to the closed state. Therefore, the street light is supplied with power below the allowable voltage, so the illuminance of the street light is not secured.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to connect a decoiled coil wound in series with a decoiled coil having a function of a single winding transformer connected in parallel to an input power supply in series to a street lamp. Back EMF cancels the current, thereby lowering the voltage and current at the same time to provide a voltage-current proportional control street light saver that saves power.

In addition, another object of the present invention is to provide a voltage-current proportional control streetlight power saver that does not short-circuit at the moment of switching the switch to a state for power saving, and that the power is not cut off instantaneously by switching.

In addition, another object of the present invention is to provide a voltage-current proportional control street lamp power saver that can be switched to the state that the power of the power supply is applied to the load as it is when the voltage applied to the load falls below the allowable voltage in the power saving state. .

In order to achieve the above object, the voltage-current proportional control street light saving device according to the present invention is a voltage-current proportional control street light saving device for supplying a street light through an output terminal by lowering the voltage and current of power input from a predetermined power source through an input terminal. A transformer coil wound around a predetermined core and connected to the first and second input terminals in parallel, and wound around the transformer coil wound around the transformer coil in a core wound around the predetermined coil, on the output end side of the transformer coil based on the transformer coil. And a plurality of output taps arranged in series in a lengthwise direction of the coil on one side of the transformer coil to lower and output a voltage output through the transformer coil, and connected in series to a second output terminal. A tap switch connected to a predetermined output tap among the tabs, and a first switch connected to the depolarizing coil in parallel and opened and closed And closing the first switch and opening the second switch when the potential difference between the first and second output stages of the power saver including a second switch connected in series with the tap switch is less than or equal to a set value. And a controller for opening the first switch and closing the second switch when the potential difference between the first and second output terminals is greater than or equal to a set value.

As a result, the power saver can reduce power consumption by supplying electric power whose voltage is stepped down by the transformer coil and the current is reduced by the polarizing coil. In particular, the power saver automatically switches between the power saving state outputting the load and the power being applied directly from the power source by lowering the voltage and the current in order to reduce the power according to the voltage output to the load by the controller.

In addition, the voltage-current proportional control street light power saver according to an embodiment of the present invention, the controller is connected to a predetermined control power stage in parallel with the relay switch is switched to the first or second switching tap, and the first and second The control power stage is configured to sense the potential between the two output stages and switch the relay switch to the first switching tap when the potential difference is less than or equal to the set value, and to switch the relay switch to the second switching tap when the potential difference is more than the set value. A relay connected in parallel to the relay switch, a first relay connected in series to the first switching tab of the relay switch to open or close a predetermined relay switch, and a second switching tab of the relay switch in parallel with the first relay; And a second relay connected in series to open or close a predetermined relay switch, and connected in series with the first relay to open the operation of the second relay. And a second relay switch connected in series with the second relay and opened in operation of the first relay, wherein the first switch is closed when the first relay is operated. And a second switch is a relay switch closed when the second relay is operated.

Such a configuration has the advantage that the circuit is high in electrical and physical shocks, and in case of failure, repair can be performed quickly by only replacing the configuration.

In addition, the voltage-current proportional control street light power saver according to an embodiment of the present invention, the controller is connected to the relay switch in series and the first switching switch and the control power stage connected in parallel to the first switching A second switching switch closed at the same time as opening of the switch and opening at the same time as closing of the first switching switch, a third relay connected in series with the second switching switch to open or close a predetermined relay switch, and the relay A third relay switch in parallel with the switch and the first relay switch and connected in series with the first relay and closed by the operation of the third relay, and connected in series with the second relay to operate the third relay. It characterized in that it further comprises a fourth relay switch opened to.

According to the above configuration, the power saver is switched to the automatic mode, which is automatically switched to the power saving state by the switching of the first changeover switch and the second changeover switch, and the switching to the manual mode which always applies the power of the power to the load as it is. It becomes possible.

Hereinafter, a voltage-current proportional control street light power saver according to the present invention will be described in detail with reference to the embodiment shown in the drawings.

1 is a circuit diagram illustrating a state in which a voltage-current proportional control street light saving device is installed in a single phase according to an embodiment of the present invention.

Referring to the drawings, the voltage-current proportional control streetlight power saving device according to an embodiment of the present invention lowers the voltage and current of the power input from the predetermined power (E) through the input terminal (I ₁ , I ₂ ) output terminal (O ₁₎ , To supply to the street lamp L as a load through O ₂ ), and includes a power saver 110, a controller 120, a surge absorber 130, and a voltmeter 140.

Power applied from the power source E to the input terminals I ₁ and I ₂ is applied to the power saver 110 through the power circuit breaker 1. The power saver 110 applies the applied power to the street lamp load L as it is, or lowers the voltage or applies the load to the load L in a range that does not interfere with the operation of the load L. That is, the power saver 110 is installed between the power source E and the load L to step down the voltage of the input power to be applied to the load under the control of the controller 120 or to load the input power as it is (L). The transformer coil Ct, the polarizing coil Cs, the output taps T ₁ to T ₄ , the tap switch St, the first switch R ₁ a ₁ , and the second switch ( R ₂ a ₁ ).

Transformer coil Ct is for applying voltage to the load L by stepping down the voltage of the power input from the power source E. The coil is wound around a predetermined core in parallel with the first and second input terminals I ₁ and I ₂ . Connected. The transformer coil (Ct) has been arranged to install a plurality of output taps (T ₁ to T ₄₎ When switching the tap switch (St) according to the output tab (T ₁ to T ₄₎ the inputs (I _1, I ₂ The power input to the transformer coil (Ct) from the voltage is stepped down and output to the output stage (O ₁ , O ₂ ). In other words, the transformer coil Ct functions as a single winding transformer.

The depolarizing coil Cs is wound around the transformer coil Ct on the core wound around the transformer coil Ct, and is serially connected to the first output terminal O ₁ at the output terminal side based on the transformer coil Ct. Leads to. Since the depolarizing coil Cs is wound around the transformer coil Ct in a polarity around the transformer coil Ct, the current flowing to the load side is reduced by an induction action with the transformer coil Ct. Therefore, the voltage of the voltage stepped down by the transformer coil Ct and the current lowered by the polarization coil Cs are applied to the load L within a range that does not interfere with the operation of the load L. . Accordingly, the load L is applied with a lower voltage and power than the power applied to the power source E by the transformer coil Ct and the polarizing coil Cs. Power savings.

The output taps T ₁ to T ₄ are arranged in the lengthwise direction of the coil at one side of the transformer coil Ct, and are outputted by lowering the voltage output through the transformer coil Ct. A tap switch St is connected to one of the output taps T ₁ to T ₄ to adjust the output voltage.

The tap switch St is connected in series to the second output terminal O ₂ and is connected to a predetermined output tap among the output taps T ₁ to T ₄ . The output taps T ₁ to T ₄ connected to the tap switch St are appropriately selected to output a voltage within a range satisfying the allowable voltage of the load L.

The first switch R ₁ a ₁ and the second switch R ₂ a ₁ have a potential difference between the output terminals O ₁ and O ₂ connected to the load L, which is equal to or less than a preset potential difference. When the output voltage stepped down by) is less than or equal to the allowable voltage of the load L, the output terminals O ₁ and O ₂ without stepping down the power applied to the input terminals I ₁ and I ₂ connected to the power supply L. Is applied as it is, and when the output voltage stepped down by the transformer coil Ct satisfies the allowable voltage of the load L because the potential difference between the output terminals O ₁ and O ₂ is equal to or greater than a preset potential difference. The switch applied to the input terminal (I ₁ , I ₂ ) connected to L) is a switch that is mutually switched to step down by the transformer coil (Ct) to output to the output terminal (O ₁ , O ₂ ). Referring to the drawings, the first switch R ₁ a ₁ is connected to and opened in parallel with the depolarizing coil Cs, and the second switch R ₂ a ₁ is connected in series with the tap switch St. Connected and opened and closed. The first switch R ₁ a ₁ and the second switch R ₂ a ₁ connected as described above have a potential difference between the first and second output terminals O ₁ and O ₂ set by the controller 120. When the value is less than or equal to the value, the first switch R ₁ a ₁ is closed, the second switch R ₂ a ₁ is opened, and a potential difference between the first and second output terminals O ₁ and O ₂ is set. In the above case, the first switch R ₁ a ₁ is opened and the second switch R ₂ a ₁ is closed. In particular, each of the first switch R ₁ a ₁ and the second switch R ₂ a ₁ is closed when the first relay R ₁ and the second relay R ₂ of the controller 120 are described below. It is characterized in that the relay switch.

When the potential applied to the load L is less than or equal to the predetermined potential difference, the controller 120 applies the input power to the load L as it is, and when the potential applied to the load L is equal to or greater than the predetermined potential difference, It is to control the power saver 110 to step down the voltage and apply it to the load (L). That is, the controller 120 closes the first switch R ₁ a ₁ and the second switch R ₂ when the potential difference between the first and second output terminals O ₁ and O ₂ is equal to or less than a set value. a ₁ ) is opened and the first switch R ₁ a ₁ is opened when the potential difference between the first and second output terminals O ₁ and O ₂ is equal to or greater than a set value and the second switch R ₂ a ₁ ) Close.

Referring to the drawings, the controller 120 includes a relay switch Sr, a relay 121, a first relay R ₁ , a second relay R ₂ , a first relay switch R ₂ b ₁ , and a _first switch. 2 relay switch R ₁ b ₁ , first and second switching switches Sc ₁ and Sc ₂ , third relay R ₃ , third relay switch R ₃ a ₁ , and fourth relay switch ( R ₃ b ₁ ).

The relay switch Sr is connected in parallel to the control power terminals P ₁ and P ₂ connected to the input terminals I ₁ and I ₂ through a control power circuit breaker 2 and according to the control of the relay 121. The switch is switched to the first or second switching tabs T ₅ and T ₆ .

Between the relay 121 is the output terminal (O _1, O ₂₎ according to the potential of the power applied to that for switching the relay switch (Sr), a first and a second output terminal (O _1, O ₂₎ When the potential is sensed and the potential difference is less than or equal to the set value, the relay switch Sr is switched to the first switching tap T ₅ , and when the potential difference is greater than or equal to the set value, the relay switch Sr is changed to the second switching tap T. ₆ ) are connected in parallel to the control power stage (P ₁ , P ₂ ) to switch to.

The first relay R ₁ opens and closes the first switch R ₁ a ₁ and the second relay switch R ₁ b ₁ , and includes a first switching tap T ₅ of the relay switch Sr. Is connected in series. When the first relay R ₁ is active, the first switch R ₁ a ₁ is closed and the second relay switch R ₁ b ₁ is opened.

The second relay R ₂ is for opening and closing the second switch R ₂ a ₁ and the first relay switch R ₂ b ₁ , and the second section d tap T of the relay switch Sr. ₆ ) in series. When the second relay R ₂ is active, the second switch R ₂ a ₁ is closed and the first relay switch R ₂ b ₁ is opened.

The first relay switch R ₂ b ₁ and the second relay switch R ₁ b ₁ are for implementing an interlock between the first relay R ₁ and the second relay R ₂ . . That is, the first relay switch R ₂ b ₁ is connected in series with the first relay R ₁ to be opened by the operation of the second relay R ₂ , and the second relay switch R ₁ b _1. )) Is connected in series with the second relay R ₂ and is opened by the operation of the first relay R ₁ .

The first changeover switch Sc ₁ and the second changeover switch Sc ₂ are for switching to an operation mode of the power saver 110, that is, an automatic mode and a manual mode. Referring to the drawings, the first changeover switch Sc ₁ is connected to the relay switch Sr in series and opened and closed, and the second changeover switch Sc _{2 is} connected to the control power stages P ₁ and P ₂ . It is connected in parallel to be closed at the same time as the opening of the _first switch (Sc ₁ ) and open at the same time as closing the first switch (Sc ₁ ). The first change-over switch (Sc ₁₎ and a second change-over switch (Sc ₂₎ is installed as described above, the first change-over switch (Sc ₁₎ is in the closed and the second switch (Sc ₂₎ is open, the automatic mode, By the relay switch Sr, the first relay R ₁ and the second relay R ₂ , the first switch R ₁ a ₁ and the second switch R ₂ a _{1 of} the power saver 110 are connected. In the manual mode in which the opening and closing is automatically performed by the potential difference between the output terminals O ₁ and O ₂ , and the first switching switch Sc ₁ is opened and the second switching switch Sc ₂ is closed. The first switch R ₁ a ₁ of the power saver 110 is always in a closed state by the relay R ₃ and the first relay R ₁ .

The third relay R ₃ is connected in series with the second changeover switch Sc ₂ and in parallel with the relay switch Sr and the first relay switch R ₂ b ₁ when activated, and in parallel with the first relay switch S _2. The third relay switch R ₃ a ₁ connected in series with R ₁ ) is closed, and the fourth relay switch R ₃ b ₁ connected in series with the second relay R ₂ is opened.

On the other hand, the voltage current in accordance with an embodiment of the invention the proportional control streetlight Switching devices are stand coupled to the input terminal (I _1, I ₂₎ to absorb the shock due to the surge of power input via the input terminal (I _1, I ₂₎ An absorber 130 is further provided.

In addition, the voltage-current proportional control streetlight power saver according to an embodiment of the present invention is connected to the output terminal (O ₁ , O ₂ ) is a voltmeter 140 for detecting and displaying the load voltage. The voltmeter 140 may be used to observe the output voltage when the output taps T ₁ to T ₄ to which the tap switches St are connected to adjust the voltage output to the load.

On the other hand, Figure 2 is a circuit diagram showing a state in which the voltage current proportional control street light power saver is installed in three phases according to an embodiment of the present invention.

The voltage-current proportional control streetlight power saver shown in FIG. 2 is similar to the voltage-current proportional control streetlight power saver shown in FIG. 1. That is, the single-phase circuit shown in FIG. 1 has one input terminal I ₁ and I ₂ , but in the three-phase circuit shown in FIG. 2, three pairs of the common terminal N and the phase input terminals R, S, and T are each paired. It consists of the input stage of. Referring to the drawings, the voltage-current proportional control streetlight power saving device connected to the three-phase circuit in FIG. 2 is a controller equipped with a power saver 210 and a relay 221 like the voltage-current proportional control streetlight power saving device connected to the single-phase circuit in FIG. 1. 220, a surge absorber 230, and a voltmeter 240.

The voltage-current proportional control street light power saver according to the present invention having the configuration as described above has a depolarization effect by connecting a decoiled coil wound in series to a load with a transformer coil having a function of a single winding transformer connected in parallel to an input power source. By inducing the coil to cancel the current flowing through the street lamp load has the advantage of reducing the voltage and current at the same time to save power.

In addition, the voltage-current proportional control street lamp power saver according to the present invention has the advantage that the short circuit does not occur at the moment of switching the switch to the state for power saving, and that the power is not cut off momentarily by switching.

In addition, when the voltage-current proportional control streetlight power saving device according to the present invention is stepped down and the voltage applied to the load falls below the allowable voltage, the power of the power supply is switched to be applied to the load as it is, and the voltage applied to the load is stepped down to the allowable voltage. In the case of the above, it has the advantage of automatically switching to apply the voltage by stepping down the voltage.

The voltage-current proportional control streetlight power saver described above and illustrated in the drawings is only one embodiment for implementing the present invention, and should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is defined only by the matters set forth in the claims below, and the embodiments improved and changed without departing from the gist of the present invention will be apparent to those skilled in the art. It will be said to belong to the protection scope of the present invention.

Claims (3)

In the voltage-current proportional control streetlight power saving device for lowering the voltage and current of the power input through the input terminal from a predetermined power supply to supply to the street lamp through the output terminal, A transformer coil wound around a predetermined core and connected in parallel to the first and second input terminals; and a coil wound around the transformer coil in a coil wound around the transformer coil in a polarized manner, in series with the first output terminal from the output terminal side based on the transformer coil. A plurality of output taps connected to each other, a plurality of output taps arranged in a length direction of the coil at one side of the transformer coil to lower the voltage output through the transformer coil, and connected in series to a second output terminal; A power switch comprising a tap switch connected to an output tap of the first switch, a first switch connected in parallel with the depolarizing coil, and a second switch connected in series with the tap switch; The first switch is closed when the potential difference between the first and second output terminals is less than or equal to the set value, and the first switch is opened. When the potential difference between the first and second output terminals is greater than or equal to the set value, the first switch is closed. The voltage-current proportional control streetlight power saver, characterized in that for opening and closing the second switch. The method of claim 1, The controller may be connected to a predetermined control power stage in parallel to detect a relay switch switched to a first or second switching tap, and detect a potential between the first and second output terminals, and the relay if the potential difference is less than or equal to a set value. A relay connected in parallel to the control power stage so as to switch the switch to the first switching tap and the relay switch to the second switching tap when the potential difference is equal to or greater than the set value, and in series with the first switching tap of the relay switch. A first relay connected to open or close a predetermined relay switch; a second relay connected in series with the first relay and connected in series with a second switching tap of the relay switch to open or close a predetermined relay switch; And a first relay switch connected in series with the first relay and opened by operation of the second relay, and connected in series with the second relay. Comprising: a second relay switch which is opened by the operation of the ray, The first switch is a relay switch that is closed when the first relay is operated, The second switch is a voltage-current proportional control streetlight power saving device, characterized in that the relay switch is closed when the second relay is operated. The method of claim 2, The controller is connected to the relay switch in series and the first switch is opened and closed, A second changeover switch connected in parallel to the control power stage and closed simultaneously with the opening of the first changeover switch and open simultaneously with the closing of the first changeover switch; A third relay connected in series with the second switching switch to open or close a predetermined relay switch; A third relay switch in parallel with the relay switch and the first relay switch and connected in series with the first relay switch and closed by the operation of the third relay; And a fourth relay switch connected in series with the second relay and opened by operation of the third relay.

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