KR20160022852A - Hybrid power control appararus - Google Patents

Abstract

A hybrid power control apparatus is disclosed. According to the present invention, the hybrid power control apparatus comprises: an auto transfer switch (ATS) to transfer any one of power from a first generator used as a main power source and commercial power to a load device; and a hybrid controller to control output power of the ATS to switch to one of the power of the first generator and the commercial power to output the power according to a voltage level of a battery. The ATS, the battery, and the hybrid controller can be independently operated or bidirectionally communicate with each other to set priority output order adjustment for two or more input power sources. Therefore, energy can be saved, and power can be stably supplied. Also, the battery can be efficiently used.

Description

[0001] HYBRID POWER CONTROL APPARARUS [0002]

The present invention relates to a power output control apparatus, and more particularly, to a power output control apparatus capable of switching a plurality of power sources input by an ATS according to a set battery voltage and an AC power input state, To a hybrid power control device.

Generally, in buildings such as public offices, schools, and buildings, various loads such as computers, vacuum cleaners, air conditioners, and the like are used. A commercial power source is used to supply the power required for such various load operations. In case of abnormal situation during commercial power supply, the power supplied to the load is automatically cut off, resulting in a power failure state. Thereafter, the emergency generator is activated to temporarily supply power to the load. Thereafter, when the commercial power returns to the normal state, the power supplied from the emergency generator to the load is cut off, and the commercial power supplies power to the load.

In the case where a power failure occurs in the commercial power supply due to an abnormal situation as described above, the operation of the emergency generator, temporary power supply to the load, and automatic operation between the commercial power supply and the emergency generator A power switching system (ATS) is used to perform the switching.

ATS (AUtomatic Transfer Switch) refers to a device that converts an electrical load between two different power elements manually or automatically.

It is a system that automatically switches the load to the power generation power when voltage is applied and the normal phase transition is stopped and the generator is activated. It adopts the uninterruptible switch function to switch between the commercial and emergency power source quickly and accurately (True double-throw).

 In other words, when the main power failure or the reference voltage is not satisfied, the start signal is transmitted to the generator, the short time delay is used in preparation for the momentary power failure, and the remote monitoring and control function of ATS is connected to PowerQuest Using the available modules, various terminal contacts are configured for remote test function (Peak Shave current) and remote test function.

The output of the inverter is used as an emergency power source. The inverter has various uses such as a DC (DC) power source and an AC (AC) power source. In recent years, the use of inverters has become even higher as the spread of new and renewable energy expands. Especially, as the development of IT industry has widened, communication equipments, computer servers, and network systems have been spreading, and related communication inverters are also required to have various functions.

In particular, communication inverters should always operate 24 hours a day, 365 days a year due to the characteristics of the load device. However, unexpected accidents may occur, and the rectifier or the battery may not be supplied with power from the DC power source. In order to solve these problems, an ATS (Auto Transfer Switch) is built in the inverter so that it can be operated by receiving the power from the commercial power of AC in case of an accident, ATS may be installed in combination to be used for switching to commercial power.

Such a conventional power automatic transfer system (ATS) is shown in FIG.

FIG. 1 is a schematic view of a regenerative power utility system according to a first embodiment of the present invention; FIG. The relay 10 is connected to the generator 20 and is also switchably connected to the load output 30.

The commercial power output from the commercial power input unit 40 is supplied to the load output 30 via the commercial power magnetic switch 16. In this case, the relay 10 maintains the ON state with the commercial power supply magnetic switch 16 and maintains the OFF state with the generator power supply magnetic switch 26. In addition, the commercial power indicator 118 connected to the commercial power magnetic switch 16 maintains the ON state to indicate that the commercial power is being used.

On the other hand, the commercial power output from the commercial power input unit 40 charges the battery 22 of the generator 20 through the battery charger 24. The commercial power output from the commercial power input unit 40 supplies electrical energy required for the operation of the relay 10 to the relay 10.

As described above, when the commercial power is supplied to the load output 30 through the commercial power supply magnetic switch 16 and the operation of the load output 30 is performed, if the commercial power supply fails, The generator is operated by transmitting a start signal to the generator 20 while interrupting the power magnetic switch. At the same time, the battery 22 of the generator 20 supplies electric energy to the relay 10 through the power supply switch 14 to maintain the operating state of the relay 10. [

Also, the relay 10 is switched (turned off) from the commercial power supply magnetic switch 16 and switched (switched) to maintain the ON power supply state with the generator power supply magnetic switch 26. Thereafter, when the generator 120 is activated in response to the start signal, the electric power generated by the generator 20 is supplied to the load output 30 through the generator power input 50 and the generator Magnetic switch 26. In this case, the power generation power indicator 28 connected to the power generation power magnetic switch 26 is maintained in the ON state to indicate that the power generation power source is being used.

Thereafter, when the commercial power is restored to the normal state, the relay 10 keeps the connection with the power generation magnetic switch 26 off and the connection with the commercial power magnetic switch 16 is on So as to maintain the same value.

Further, the relay 10 transmits a stop signal to the generator 20, and the operation of the generator 20 is stopped according to the stop signal.

In this way, the power switching system according to the related art performs automatic switching between the commercial power supply and the generator 20 when the commercial power supply and the commercial power supply are out of order.

The generator emergency stop switch 12 shown in FIG. 1 is connected to the generator 20 itself, regardless of whether the commercial power is normally supplied or the generator 20 is supplied with the abnormal power, And is provided to stop the operation of the generator 120 when an abnormal situation occurs.

However, the conventional power supply switching system having the relay 10 as described above has the following problems.

There is a problem in that the operation of the load device is interrupted instantaneously because the output of the generator is interrupted to the commercial power source and the sensitive network equipment or the computer server recognizes it as a momentary power failure and the communication equipment is instantaneously shut down.

In addition, when the battery is charged using the solar panel using permanent energy such as sunlight, and the battery is used as an input power source through the inverter, the ATS is switched regardless of the state of the battery, There is no way.

If the voltage of the battery drops while using the battery voltage after the commercial power supply is shut down, the power supplied to the load device is inevitably cut off. Therefore, the communication device or the server is down and the data is not damaged. none.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a hybrid power control apparatus capable of sensing a battery voltage and setting a priority output order for two or more input power sources.

It is another object of the present invention to provide a hybrid power control apparatus capable of effectively using an input power source by dividing a cut-off voltage of a battery into a first low-voltage cutoff and a second low-voltage cutoff.

It is another object of the present invention to provide a hybrid power control apparatus capable of efficiently using permanent natural energy to save energy.

It is another object of the present invention to provide a hybrid power control apparatus having a bidirectional communication function.

It is another object of the present invention to provide a hybrid power control apparatus capable of performing a UPS function in any case, such as power failure or battery power cutoff.

In order to solve such a problem, an apparatus for controlling a hybrid power according to an embodiment of the present invention includes an AC power source that receives a DC power from a first generator of a solar panel, a wind turbine, or a DC generator, (ATS) for supplying electric power to the load device from an electric power source and a DC / AC inverter to an AC power source (ATS); an ATS connected to the first electric power generator And a battery connected to the DC / AC inverter, wherein the battery is electrically connected to the input power of the DC / AC inverter, and a power source of the ATS is connected to a power source or a commercial power source And a hybrid controller for controlling the ATS, the battery, and the hybrid controller to perform independent operation Can be achieved by configuring to enable bidirectional communication.

The hybrid controller sets a first low voltage for switching the output power of the ATS and a second low voltage lower than the first low voltage, and when the voltage of the battery exceeds the first low voltage, the input of the DC / AC inverter And controls the power source to be output through the ATS. When the voltage of the battery drops below a first low voltage, the power source is controlled to be output through the ATS.

The hybrid controller controls the input power of the DC / AC inverter to be output through the ATS when the KEPT is judged to be a blackout, and when the voltage of the battery reaches the secondary low voltage, the hybrid controller switches the output voltage of the ATS .

To this end, the hybrid controller includes an ATS controller for controlling an output voltage of the ATS, a battery voltage detector for sensing a voltage level of the battery, an electrostatic detector for detecting whether the korean power source is turned off,

And a battery voltage setting unit for setting a primary low voltage for switching the output power of the ATS and a secondary low voltage lower than the primary low voltage, wherein the voltage of the battery sensed by the battery voltage sensing unit is the primary low voltage The ATS control unit controls the input power of the DC / AC inverter to be output through the ATS, and when the voltage of the battery falls below the first low voltage, the ATS control unit controls the KEPD power to be output through the ATS .

Therefore, according to the hybrid power control apparatus of the present invention, it is possible to set the priority output order adjustment for two or more input power sources, thereby saving energy and efficiently using the battery.

In addition, according to the hybrid power control apparatus of the present invention, when the battery voltage is high, it is detected that solar power, wind power, DC power generation is good and adjusted to the power inverter output priority. When the battery voltage falls below a predetermined voltage, It is possible to supply power without interruption of electricity.

In addition, according to the hybrid power control apparatus of the present invention, since the voltage for switching the output power of the ATS is biased, the power can be supplied to the power inverter power source in the first and second low voltage ranges during the power failure, .

According to the hybrid power control apparatus of the present invention, when the KEPCO power source is unstable or in an emergency, the output order can be remotely adjusted and controlled, and the power can be used for preventing blackout and the like.

1 is a schematic illustration of a conventional power automatic transfer system (ATS)
2 is a main configuration diagram of a hybrid power control apparatus according to an embodiment of the present invention,
FIG. 3 is a detailed configuration diagram of the hybrid controller of FIG. 2,
And,
4 is a flowchart illustrating an ATS output voltage control process according to an exemplary embodiment of the present invention.

First, the meaning of the term described in the present application should be understood as follows.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. Also, the terms "---", "---", "module", "device", and the like in the specification mean a unit for processing at least one operation, which is a combination of hardware and / Lt; / RTI >

Furthermore, the terms "first "," second ", and the like are used to distinguish one element from another element, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It should be understood that the singular " include "or" have "are to be construed as including a stated feature, number, step, operation, component, It is to be understood that the combination is intended to specify that it is present and not to preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

In each step, the identification codes (e.g., a, b, c, ...) are used for convenience of explanation, and the identification codes do not describe the order of each step, Unless the specific order is described, it may occur differently from the order specified. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a main configuration diagram of a hybrid power control apparatus according to an embodiment of the present invention, and FIG. 3 is a detailed configuration diagram of the hybrid controller of FIG.

2, a DC / AC inverter 140 for receiving a DC power of a first generator operated as a main power source and supplying the converted AC power to the input power of an automatic transfer switch (ATS) An automatic transfer switch (ATS) 120 for receiving and transferring a first power source 141, which is an output power source of the AC inverter 140, and a third power source 121, A battery 170 electrically connected to the DC / AC inverter 140 and charged or charged by the third power source 121 and the charged voltage is electrically connected to the input power of the DC / AC inverter 140, A hybrid controller 110 for controlling the output power of the ATS 120 to be switched to a power source of either the first power source supplied from the DC / AC inverter 140 or the third power source 121 supplied from the electric power source, So that the priority output order adjustment for two or more input power supplies So that stable electric output, energy saving and efficient use of the battery can be achieved.

For this purpose, the DC / AC inverter 140 receives the DC power from the first generator, which is composed of a solar panel, a wind turbine, or a DC generator, and converts the DC power into AC to bend the input power to the ATS 120 .

Also, the output power of the first generator 190 is used as a main power for supplying power to a load device (not shown), charging the battery 170 and supplying stable power to the DC / AC inverter 140 The charging controller 180 may be additionally provided in series on the connection line between the first generator 190 and the inverter 140 and the battery 170 may be further provided on the line to which the charging controller 180 and the inverter 140 are connected. And is circuitarily connected to the inverter 140 so that the charging power is supplied.

Also, the battery 170 is connected to the output power of the charge controller 180 and charged first, and is charged through the uninterruptible power supply (third power supply) 121.

At this time, the charge voltage of the charge controller 180 is set to be higher than a charger for charging a battery using an uninterruptible power supply (for preventing discharge of the battery when the nighttime or long-term weather is blunted or for charging the battery when the generator is started) So that the energy can be efficiently saved.

In this case, the third power source 121 may be an AC power source and may further include an AC / DC battery charging unit 150 that converts the DC power to DC to charge the battery.

An automatic transfer switch (hereinafter referred to as "ATS") includes a power source of any one of a third power source 121 as a power source power source and a first power source 141 output from a DC / AC inverter 140 And is output to the load device under the control of the hybrid controller 110.

This ATS is usually used to switch to another power source in case of power failure of one power source, and if power failure can not be done due to failure of ATS, power can not be supplied to the load side. Therefore, You can also install the device.

In the present invention, the first power source 141, the third power source 121, and a second power source 131 described later are provided for convenience of explanation.

The second power source 131 protects the battery 170 when the third power source 121 supplied from the first power source becomes unstable or is out of order and the usage amount of the first power source 141 reaches a certain set level, At the same time, it is a power source supplied from a separate generator such as a generator to supply continuous power to the load device without interruption.

The hybrid controller 110 controls the output power of the ATS 120 according to the output voltage level of the battery 110 from the first power supplied from the DC / AC inverter 140, the second power supplied from the generator, And the third power source is outputted from the ATS 120 to the load device.

Specifically, the hybrid controller 110 sets the primary low voltage of the battery for switching the output power of the ATS 120 and the secondary low voltage lower than the primary low voltage so that the voltage of the battery 170 becomes the primary low voltage AC inverter 140 is output through the ATS 120. When the voltage of the battery 170 falls below the first low voltage, the third power source 130 of the KEPCO controls the ATS 120 120).

This primary low voltage is set to switch to the KEPCO priority output or to switch to the generator power priority output mode when the set voltage is reached. When the solar power is good, the voltage is high. And the secondary low voltage is to maintain the residual amount of the battery so that power can be supplied even in an emergency such as a power failure.

Since the lowest voltage (cut-off voltage) available for power supply is about 10.5 to 11 V when the battery 170 is fully charged, the primary low voltage is formed between the full charge voltage and the lowest voltage (for example, 12 V) When the voltage of the battery 170 reaches the first low voltage, the voltage discharged from the battery 170, that is, the output of the DC / AC inverter 140 is stopped to give an adjustment signal to the normal power output priority mode, Thereby preventing the consumption of the battery. And then to supply the emergency power to the output of the DC / AC inverter 140 when the third power source 121 of KEPCO is unstable or blocked due to a power failure or the like.

Also, the secondary low voltage may be set to about 10.5 to 11 V, which is a cutoff voltage of the battery, though it depends on the battery configuration.

The hybrid controller 110 controls the input power of the DC / AC inverter 140 to be output through the ATS 120 when the third power source 121 is determined to be out of order, The second power generator 131 is operated such that the second power source 131 output from the second generator 130 is output to the ATS 120. In this case,

That is, when the secondary low voltage is reached, a signal is given to operate the generator before the DC / AC inverter 140 is turned off to control the generator power to be outputted without momentary power failure.

In addition, the hybrid controller 110 operates the generator by giving an automatic start signal to the second generator 130 when a long time of power failure or voltage of the battery comes just before the second low voltage, and the power (second power) (120) to be supplied to the load device.

At this time, if the power output from the second generator 130 is AC, the battery 170 may be used as a charging power source through a separate AC / DC charger 160 or an AC / DC battery charging unit 150, The battery can be charged and the power output of the DC / AC inverter 140 can be continued.

The hybrid controller 110 controls either one of the third power source 121 of the KEPCO, the second power source 131 of the second generator 130 and the input power of the DC / AC inverter 140 to the battery 170 It is controlled so that it can be used in accordance with the voltage setting range or the input state of AC or DC power source.

The detailed configuration of the hybrid controller 110 for performing such an operation will be described with reference to FIG.

That is, the hybrid controller 110 includes an ATS controller 111 for controlling the output voltage of the ATS 120, a battery voltage detector 112 for detecting the voltage level of the battery 170, a third power source 121 of the KEPCO, A first low voltage switchable for switching the AC output priority for switching the output power of the ATS 120 to another power supply, and a second low voltage And a generator driving unit 115. When the voltage of the battery 170 sensed by the battery voltage sensing unit 112 exceeds the primary low voltage, The controller 111 controls the first power source of the DC / AC inverter 140 to be outputted through the ATS 120. When the voltage of the battery 170 falls below the first low voltage, the third power source 121 of the KEPCO ATS (120).

The hybrid controller 110 controls the first power source 141 of the DC / AC inverter 140 to transmit power to the ATS 120 when the third power source 121 of the first electric power source is determined as a power failure through the AC sensing unit 113, If the voltage sensed by the battery 170 reaches the secondary low voltage, the generator 170 is given an operation command to sense the supply of the generator power for a predetermined period of time (about 5 seconds) and is determined to be supplied stably Generator power is output to the ATS 120. If the power being output through ATSats is interrupted, the power is supplied to the spare power supply at a high speed, but when the power output from the ATS is live, the output is switched to another (KEPCO or the second generator) It is preferable to determine whether the other power source (KEPCO or the second generator) is stably supplied for a predetermined period of time (about 5 seconds) and then switch the power.

On the other hand, the hybrid controller 110 is electrically connected to enable bidirectional communication to check the voltage of the battery, check the generation amount of sunlight and the like, drive the second generator, and control the ATS.

In the present invention, not only the wireless communication in which the communication is wired, but the independent operation in which the wireless communication is performed is not limited to the wireless communication, but also includes components capable of communicating bidirectionally including short range wireless communication. A terminal equipped with a display device capable of inputting data such as a keyboard, a general smart phone, and a PC so that data can be set through the terminal.

Operation of the hybrid power control apparatus having such a configuration will be described with reference to the drawings.

FIG. 4 is a flowchart illustrating an ATS output voltage control process according to an embodiment of the present invention. First, the hybrid controller 110 sets a primary low voltage and a secondary low voltage through a battery voltage setting unit 114 do.

When the sensed voltage is equal to or higher than the set voltage (full-charged state) (S211), the DC / AC inverter (step S210) detects the voltage of the battery 170 through bidirectional communication at the battery voltage sensing unit 112 The ATS controller 111 controls the ATS 120 to connect the first power source 141 of the battery 170 to the load device at step S220 and if it is determined at step S212 that the power of the battery 170 is lower than the set primary low voltage , The ATS control unit 111 controls the ATS 120 so that the third power source 141 of the KEPCO is connected to the load device (S213).

If the third power source 121 of the KEPCO is judged as a blackout through the blackout detecting unit 113, the hybrid controller 110 controls the first power source 141 of the DC / AC inverter 140 to be connected to the load device The ATS control unit 111 controls the ATS 120 (S215).

If it is not a power failure in step S214, it is controlled so that the third power source is outputted.

The hybrid controller 110 controls the first power source 141 to be connected to the load device and then determines whether the voltage sensed by the battery voltage sensing unit 112 has reached the second low voltage at step S216, The second generator 130 is operated to charge the battery 170 or the second power source 131 of the second generator 130 is connected to the load device 120 through the ATS 120. [ (S217 to S218).

On the other hand, if it is determined in step S212 that the detected voltage of the battery is equal to or higher than the first low voltage, the first power source is controlled to be output through the ATS 120. [

Here, when the KEPG power is recovered or the first power output condition, that is, the battery voltage is increased, a command is given to stop the generator start and the output is switched to the corresponding power source.

As described above, according to the hybrid power control apparatus of the present invention, it is possible to adjust the priority output order for two or more input power sources in accordance with the voltage level of the battery, so that natural energy such as sunlight, wind power, Thereby saving energy, securing a spare power supply, and enabling stable power supply. Further, the battery can be efficiently used and the power can be supplied without interruption by detecting the state of the power input to the ATS .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

110: Hybrid controller 111: ATS controller
112: battery voltage sensing unit 113:
114: battery voltage setting unit 115: generator driving unit
120: ATS 121: Third power source
130: second generator 131: second power source
140: DC / AC inverter 141: First power source
170: Battery 190: First generator

Claims (3)

A first generator which is constituted by a solar panel or a wind power generator and is used as a main power source for supplying power to a load, and a second power generator which converts DC power generated by the first generator into AC and supplies it to an automatic transfer switch A first power source comprising a DC / AC inverter;
A battery electrically connected to the first generator to supply a charged and charged voltage to the DC / AC inverter;
A charge controller electrically connected to the first generator to supply stable power to the DC / AC inverter and to charge the battery;
A second power source for supplying the power generated by the generator to the ATS; And
A hybrid controller for controlling the ATS to transfer power from any one of the first power source, the second power source, and the battery to the load;
, And the hybrid controller
An ATS control unit for controlling an output voltage of the ATS;
A battery voltage sensing unit for sensing a voltage level of the battery;
An electrostatic detecting unit for detecting whether or not the third power source is turned off;
A battery voltage setting unit for setting a primary low voltage set between a full charge voltage and a lowest voltage usable as a power supply and a secondary low voltage set to a lowest voltage for switching the output power of the ATS to another power supply; And
A generator driving unit for driving the separate generator;
Wherein the ATS controller controls the first power source to be output through the ATS when the voltage of the battery sensed by the battery voltage sensing unit exceeds the first low voltage, AC power source is used as an input power source of the DC / AC inverter,
And when the voltage of the battery reaches the secondary low voltage, a start signal is given to the second generator to control the second power outputted from the second generator to be outputted to the ATS. The hybrid power control apparatus according to claim 1, wherein, when the second generator is operated, the power output from the second generator is used as a charging power source for the battery. The hybrid power control apparatus of claim 1, further comprising an AC / DC battery charging unit for charging the battery by converting the third power source to DC when the third power source is activated.

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