KR100740764B1 - Line change type un-interruptible power hybrid inverter system having a booster function and a parallel converter function - Google Patents

Abstract

A line change type uninterruptible power hybrid inverter system having a booster function and a parallel converter function is provided to improve the usage efficiency of natural energy by simultaneously using various power sources. A line change type uninterruptible power hybrid inverter system having a booster function and a parallel converter function includes an electricity generating apparatus(105,105-1), a rectifying unit(110), an inverter unit(120), a system interconnection apparatus(130), a storage battery(150), a microcomputer controlling unit(C), a digital interface unit(D), a booster converter(170,170-1), a rectifying unit(180), and a parallel converter(190). The electricity generating apparatus(105,150-1) generates electricity by using a natural energy. The rectifying unit(110) rectifies AD power or DC power supplied from the electricity generating apparatus(105,105-1) into the DC power. The inverter unit(120) receives the DC power from the rectifying unit(110), and changes the DC power into the AD power. The system interconnection apparatus(130) supplies the AD power applied from the inverter unit(120) to a load(157), and is converted to common power(140) when the AC power is not supplied. The storage battery(150) is connected between the rectifying unit(110) and the inverter unit(120), and charges a part of the DC power. The microcomputer controlling unit(C) and the digital interface unit(D) are connected with the rectifying unit(110), the inverter unit(120), the system interconnection apparatus(130), and the storage battery(150). The booster converter(170,170-1) is connected with the electricity generating apparatus(105,105-1), and functions as a booster with the rectifying unit(110) to convert the unstably generated electric energy to usable energy. The rectifying unit(180) rectifies by being connected with the common power(140). The parallel converter(190) is connected with the booster converter(170,170-1) and the rectifying unit(180) in parallel.

Description

Line change type uninterruptible power hybrid inverter system having a booster function and a parallel converter function}

1 is a block diagram illustrating a grid-connected inverter device to which a conventional technique is applied.

Figure 2 is a block diagram showing a grid-type uninterruptible hybrid inverter device having a booster function and a parallel converter function to which the technique of the present invention is applied.

3 is a block diagram showing a parallel converter configured in a grid-type uninterruptible hybrid inverter device having a booster function and a parallel converter function to which the technique of the present invention is applied.

4 is a block diagram showing the function of a booster converter configured in a grid-type uninterruptible hybrid inverter device having a booster function and a parallel converter function to which the technique of the present invention is applied.

FIG. 5 is a waveform graph illustrating a process in which alternating current is formed by an inverter unit configured in a grid-type uninterruptible hybrid inverter device having a booster function and a parallel converter function to which the technique of the present invention is applied.

* Description of the symbols used in the main parts of the drawings *

105, 105-1: electricity generating device 110, 180: rectifier

120: inverter 130: grid connection device

150: battery 151: charge and discharge control unit

170, 170-1: Booster converter 190: Parallel converter

191, 195: power semiconductors 193, 197: current reactor

200: parallel control unit 201: commercial power detection unit

203: power generation power detection unit 205: current amount control unit

207: parallel control command unit

In the grid-type uninterruptible hybrid inverter device having a booster function and a parallel converter function according to the present invention, a booster converter is connected to a pollution-free electric generator that can obtain electrical energy from natural phenomena, and a rectifier connected to the booster converter and a commercial power source. By configuring the parallel converter to be connected in parallel, even if the amount of energy generated from the electricity generating device is less than the amount of power required by the load, the loss of weakly supplied electric energy is prevented, and the battery can be efficiently charged, and the grid connection device The present invention relates to a grid-type uninterruptible hybrid inverter device having a booster function and a parallel converter function, which can prevent equipment failures, failures, and shortened lifespans due to frequent switching.

1 is a block diagram showing a grid-connected inverter device to which the prior art is applied, wherein the grid-connected inverter device is from an electric generator for generating electricity from natural phenomena such as solar power, tidal power or wind power generator. Apparatus for supplying the supplied electrical energy to the load, when the power is not supplied from the grid-connected inverter device is configured to enable the power from the commercial power source.

Looking at the configuration of the grid-connected inverter device (1) to which the prior art is applied as follows.

Electricity generating device 10 for generating electricity by natural phenomena such as solar power, tidal power, or wind power, and rectifying unit 20 and rectifying unit for forward rectifying DC power or AC power supplied from the electricity generating device 10 to DC power. Inverter unit 30 which receives DC power from 20 and changes it into AC power and AC power applied from inverter unit 30 are supplied to load 70 and AC power is not supplied from inverter unit 30. If not, the DC power supply supplied from the rectifier 20 in conjunction with the grid linkage device 40 and the rectifier 20 and the inverter unit 30 is provided with a switching switch is switched to the commercial power to be connected to the commercial power supply Storage unit 60 to charge a portion of the control and input or detected information and signals associated with each part in accordance with the program or control circuit to instruct, control and process the operation It consists of the value (80).

The rectifier 20 is composed of a rectifier semiconductor 21 having a rectifying function and a filter combined with a reactor 23 and a condenser 25 to filter the voltage of irregular pulsation passing through the rectifying semiconductor 21 with a constant power source. do.

Looking at the operation process of the prior art by the above configuration as follows.

When electrical energy is generated from the electricity generating device 10, the power generation generated from the electricity generating device 10 is rectified by the rectifying unit 20 to be a direct current power source, the filter provided in the rectifying unit 20 As a result, the DC power becomes a DC voltage having a constant voltage from which the pulsating component is removed, and is converted back into AC power through the inverter unit 30 and supplied to the load 70.

However, since the electric generator 10 relies on natural phenomena, the generation of electric energy becomes irregular according to the weather and the season and the time zone, and thus it is not possible to constantly supply the electric energy, for example, in the case of solar power generation. On cloudy days, during rain, or at night, it can't produce or weakly generate electrical energy.

Therefore, when the input rectified amount is supplied less than the amount of power required by the load 70 electrical equipment or lower than the voltage of the battery 60, it cannot be used and is lost. In this case, DC power is supplied from the battery 60 to the inverter unit ( After converting to AC power through 30, it is supplied to the load 70 for a predetermined time.

When the DC power flowing into the inverter unit 30 is lower than the rated voltage or the voltage is irregular and the inverter operating conditions are not suitable, the inverter function is stopped, so that the grid-connected device 40 supplies power from the inverter unit 30. Disconnected and connected to the commercial power source so that the commercial power is supplied to the load (70).

The grid-connected inverter device 1 by the above configuration and operation has the following problems.

In the case where the supply amount generated from the electricity generating device 10 relying on irregular natural phenomena cannot generate electric energy continuously with the amount of power required by the load 70, the generated electric energy cannot be used as available energy. There is this. In other words, the electric power of the rated power supply is interrupted and is interrupted, and the electric energy that does not reach the rated power is supplied irregularly.

By supplying the irregular electrical energy of the electricity generating device 10, the grid connection device 40 is connected to the commercial power source, the operation is linked to the inverter unit 30, that is, frequent switching phenomenon occurs. Therefore, the load 70 is supplied with alternating commercial power and unstable inverter power, and the load 70 is exposed to the electric shock generated when switching, and may be introduced from the abnormal current and voltage or the commercial power caused by the switching phenomenon. In addition to the harmful power supply, the grid-connected inverter device 1, as well as the failure and failure factors of the load 70, as well as the factors that shorten the life.

In addition, when the system linkage device 40 is switched to a commercial power source, all the electric energy generated from the electric generator 10 must be lost, and thus, the electric generator 10 is not well known. Since it is supplied directly to the load 70, the load 70 cannot be protected from fluctuations in commercial power, harmful components, and power outages.

In addition, when the load 70 is supplied with the electric energy for a predetermined time from the storage battery 60 through the inverter unit 30, a large capacity storage battery 60 is required, in order to charge the electrical energy to the storage battery 60 The electric power generated by the electric generator 10 may be charged with some energy only when electric energy having a voltage higher than the chargeable voltage is supplied. The electric energy supplied from the electric generator 10 is irregular in voltage and current. If it is unstable and cannot be charged properly, the capacity of the battery decreases due to frequent charging and discharging and the life span is drastically shortened. Therefore, even when the supply of electric energy from the electricity generating device 10 is stopped due to the natural phenomenon, the storage battery 60 cannot function properly, and the transfer phenomenon is generated immediately.

Due to the problems of the grid-connected inverter device (1), the electricity generating device (10) that is generated from natural phenomena is rarely used in practice and is a test stage, and still remains a future problem. to be.

In the present invention, in order to solve the above problems, a high power factor booster control circuit that can be controlled together with a rectifier connected to the electricity generating device to convert the electric energy generated weakly or unstable from the electricity generating device into available energy. An integrated booster converter is provided, and the rectifier unit is configured to supply commercial power so that the inverter is connected to the parallel converter in parallel, so that the inverter unit is proportionally supplied with the generated power generated from the electric generator and commercial power. It is connected to a parallel converter which is composed of a multi-parallel input structure so that it can be selected and supplied, and the inverter unit is supplied with commercial power proportionally and randomly according to the supply amount of the generated power. Can generate voltage, and also It is possible to use electricity generating device using other natural energy, so it is excellent in efficiency, and there is no supply of power generation power, so it is possible to supply stable high-quality constant voltage constant frequency power supply to the load even when using commercial power only. The battery can be used at all times even when there is no supply of power or even when there is a power failure, so that the load equipment can be operated by power supply of uninterrupted, constant voltage, and constant frequency. An object of the present invention is to provide a grid-type uninterruptible hybrid inverter device having a booster function and a parallel converter function capable of supplying electric energy without a commercial power supply.

Hereinafter, with reference to the accompanying drawings look at the configuration, operation and effects of the present invention for achieving the above object.

Figure 2 is a block diagram showing a grid-connected uninterruptible hybrid inverter device having a booster function and a parallel converter function to which the technique of the present invention is applied, Figure 3 is a grid-connected type having a booster function and a parallel converter function to which the technique of the present invention is applied 4 is a block diagram showing a parallel converter configured in an uninterruptible hybrid inverter device, FIG. 4 is a block diagram showing a function of a booster converter configured in a grid-type uninterruptible hybrid inverter device having a booster function and a parallel converter function to which the technology of the present invention is applied. 5 is a waveform graph illustrating a process in which an alternating current is formed by an inverter unit configured in a grid-type uninterruptible hybrid inverter device having a booster function and a parallel converter function to which the technique of the present invention is applied.

The general grid-connected inverter device 100 is an electric generator (105, 105-1) for generating electricity by natural phenomena such as solar, tidal, or wind power and the direct current supplied from the electric generator (105, 105-1) Rectifier 110 is provided with a rectifying semiconductor 111 to forward or rectify the power or AC power to a stable DC power source and the inverter unit 120 receives the DC power from the rectifying unit 110 and changes to AC power and the inverter The system is switched to the commercial power 140 to supply the AC power applied from the unit 120 to the load 157 and to apply the commercial power 140 when the AC power is not supplied from the inverter unit 120. The storage device 150 is connected between the linking device 130 and the rectifying unit 110 and the inverter unit 120 to charge a part of the DC power supplied from the rectifying unit 110. Wow The control signal and operation information can be input from the outside in connection with the microcomputer control unit C and the microcomputer control unit C that instructs, controls, and processes the operation by being connected to each part according to a set program or a control circuit. A digital interface unit D is provided which represents and transmits the internal operating state and the information detected and processed in each part.

In the present invention, the basic configuration of the high-efficiency, high power factor booster converter (170, 170-1) has the function to enable the use of irregular, unstable and weakly generated electrical energy, and also parallel converter 190 Even when the generated power supplied from the booster converters 170 and 170-1 is insufficiently supplied than the power required by the load 157, the insufficient power is supplied from the rectifier 180 connected to the commercial power supply 140 without interruption. Since the inverter unit 120 is proportionally and randomly supplied from the parallel converter 190 to each of the different DC powers, it is possible to output the set frequency and voltage of the sinusoidal waveform as a stable conversion role. Characterized in that configured.

To this end, in the present invention, different or identical electric generators 105 and 105-1, such as solar cells, wind turbines, tidal or hydroelectric generators, which generate electricity in different environments and weather conditions, may be used alone or in parallel. A plurality of booster converters (170, 170-1) are configured to be used to combine the electric energy generated from each of the electric generators 105, 105-1 to supply a single DC power supply more efficiently and stably the electric energy Can be supplied.

In addition, the booster converter (170, 170-1) is a part that is responsible for the booster function configured in conjunction with the rectifier 110, and then connects the DC reactor 113 and the rectifying semiconductor (117, diode), the DC reactor ( After the switching control power semiconductor 118 is connected between the 113 and the rectifying semiconductor 117, the electrical characteristics and the parallel converter 190 supplied to the switching control power semiconductor 118 from the electric generators 105 and 105-1. By booster control circuit unit 119 that can be adjusted to fit the) to ensure that the high efficiency high power factor booster converter (170, 170-1) is configured.

The booster converters 170 and 170-1 may be provided in plural numbers so as to be connected to different or identical electric generators 105 and 105-1, thereby increasing the power supply of the electric generators 105 and 105-1 to increase efficiency. And there is an advantage to improve the safety.

In addition, the present invention uses a rectifier 180 consisting of a filter unit provided with a reactor 183 and a condenser 185 together with a rectifying semiconductor 181 so that the supply of commercial power 140 is possible in parallel with the power generation power. The rectifier 180 and the booster converters 170 and 170-1 are connected to the parallel converter 190 in parallel so that the supply of stable DC power to the inverter unit 120 is provided. By the configuration to enable the configuration of the parallel converter 190 is configured to enable.

The parallel converter 190 is controlled by a power semiconductor 191 and a current reactor 193 capable of controlling the amount of current of the DC power supplied from the rectifier 180, and is supplied from the booster converters 170 and 170-1. It is configured to be controlled by a power semiconductor 195 and a current reactor 197 capable of controlling the amount of current of the DC power (power generation power), each of the current control power semiconductors (191, 195) is connected to the parallel controller 200. .

The parallel controller 200 detects a voltage and a current rectified by the commercial power supply 140 and transmits a signal to the microcomputer control unit C. The commercial power amount detector 201 and the electric generators 105 and 105-1 are provided. The power generation amount detection unit 203 is configured to detect a voltage and a current of the power generation power supplied from the power transmission unit, and transmit a signal to the microcomputer control unit C. The parallel control instruction unit 207 which sends a signal to the current amount control unit 205 and the parallel control instruction unit 207 to control the amount of current supplied from the generators 105 and 105-1 receives electricity from the commercial power supply 140 and The current amount control unit 205 controls the amount of current in the generator 105.

In addition, between the parallel converter 190 and the inverter unit 120, the storage battery 150 and the charge and discharge control unit 151 is configured, the charge and discharge control unit 151 and booster converter (170, 170-1) Since the safe power can be supplied through the parallel converter 190 of the multi-input structure that can receive the power of the rectifier 180, respectively, it does not matter whether the amount of power generation is small or small, so the charge and discharge phenomenon does not occur from time to time. When the battery 150 is in a fully charged state and discharges to the inverter unit 120 to serve as an emergency energy source when the power supplied from the parallel converter 190 to the inverter unit 120 is insufficient or interrupted. The voltage of the battery 150 is lower than the DC potential supplied from the parallel converter 190 so as to increase safety by preventing the battery 150 from being charged and discharged at any time, thereby preventing capacity reduction and shortening the life of the battery 150. It is composed.

The basic configuration of the inverter unit 120 is divided into a single-phase inverter and a three-phase inverter, and is related to the pulse distribution circuit for the quantity of power semiconductor elements for controlling DC power to AC power and the phase angle for three-phase control. Since the principle is the same, the generation of sinusoidal waveforms by the operation of the inverter will be described. As shown in FIG. 5, the sinusoidal PWM control principle of the digital inverter controllers 222 and DSP is based on the control signal of the microcomputer control unit C. The waveform generated to output the AC power of the sine wave at the set voltage and frequency is the first of the sinusoidal wave signal 731 of the output voltage control synchronously generated in synchronization with the commercial power supply 140 when viewed from the zero crossing 736 position. +), The negative signal and the frequency of the sinusoidal signal 731 to produce a harmonic PWM signal (Gate signal) necessary for the control operation of the power semiconductor A positive and negative triangular carrier wave 732 is generated according to a high division ratio, and a positive and negative square wave 733 and a negative square wave 734 are generated using a comparator. The gate control unit 220 for fast switching the power semiconductors 740, 741, 742, and 743 on and off by combining the negative square wave signals 733 and 734 into exclusive logic through a logic circuit. The gate controller 220 is operated in pairs through the digital inverter controller 222 and is applied to the power semiconductors 740, 741, 742, and 743, and the power semiconductors 740, 741, 742, and 743 are When the DC power supplied from the parallel controller 190 is switched at high speed by the PWM method according to the gate signal 737 of the gate controller 220, the inverter transformer 750 connected to the power semiconductors 740, 741, 742, and 743 is provided. It is applied to the primary coil of and output voltage is generated in the secondary coil by magnetic field coupling. Inverter transformer 750 connected to the inverter unit 120 is made by including a reactor circuit for resonance (filter) by the internal magnetic shunt configured in the core included in the coil for the output voltage and the AC resonant capacitor connected in parallel to the transformer output ( 751), the high frequency component is removed and the user outputs the sine wave AC power (735 in FIG. 5) at the set frequency and voltage according to the control information set by the microcomputer control unit C. Supply to the load 157.

The grid linkage device 130 is composed of two pairs of semiconductors to supply the synchronous transfer switch 131 and the commercial power 140 for the inverter power supplying the AC power generated from the inverter unit 120 to the load 157. And a synchronous transfer switch 132 for commercial power, and the synchronous transfer switch 132 on the side of the commercial power supply 140 is a commercial power source in case of an abnormality of the inverter unit 120 (overload, abnormal voltage, semiconductor burnout, etc.). It is configured to be connected to the commercial power 140 automatically and uninterrupted so as to supply the output power to the load 157 by bypassing the synchronous transfer switch 132 of the commercial power 140 side in parallel for maintenance or troubleshooting Configure the emergency maintenance switch 133.

Looking at the operation of the present invention by the above configuration as follows.

When irregular power generation power is generated from the electric generators 105 and 105-1, it is converted into stable DC power through the booster converters 170 and 170-1, and the DC reactor 113 connected to the rectifying semiconductor 111. Energy is stored when the DC power is supplied so as to be raised to a constant voltage by the on / off operation of the switching control power semiconductor 118, and the DC reactor when the switching control power semiconductor 118 is turned off ( The rectified semiconductor 117 for refluxing the accumulated electrical energy of 113 is adjusted to a constant DC voltage and is supplied to the parallel converter 190, and the DC power supplied to the parallel converter 190 is controlled by the microcomputer controller C. The amount is selectively adjusted according to the signal and supplied to the inverter unit 120.

In addition, the parallel converter 190 enables smooth charging by supplying electricity of a rated voltage to the storage battery 150 connected to the charge and discharge control unit 151.

On the other hand, after the power supplied from the commercial power supply 140 is rectified by the rectifier 180 to DC, and supplied with the power generation power to the parallel converter 190, looking at the operation of the parallel converter 190, The microcomputer control unit C receives information from the commercial power amount detector 201 and the generated power amount detector 203 and compares the information. When the power generation power of the electricity generating device 105 is insufficient, the microcomputer control unit C uses the parallel control commander 207. The current amount control unit 205 is operated to supplement the insufficient electric energy of the power generation power from the commercial power supply 140.

The parallel converter 190 may be supplied by selecting one of the power generation power or the commercial power supply 140 of the electricity generating device 105 in connection with the microcomputer control unit C, and configured to enable a proportional parallel control function. In the case where the supply of the generated power amount is insufficient than the amount of power required for the load 157, the insufficient amount of electricity may be supplied from the commercial power supply 140.

The DC power source formed through the parallel converter 190 is converted into AC through the inverter unit 120 and applied to the load 157 via the grid connection device 130.

According to the present invention by the above configuration and operation, even if the power source is irregular, unstable and weak, the booster control circuit unit 119 is configured to supply stable electrical energy to the inverter unit 120 by the booster converter (170, 170-1) is configured. And, the extra power can be smoothly charged to the storage battery 150 through the charge, discharge control unit 151, if the electrical energy of the power generation power supply by the function of the parallel converter 190 is insufficient by the commercial power supply Since it can be supplied from 140, even if the power generation power is weak, there is an advantage that can be used without disappearing, even if the power generation is destroyed by natural phenomena, commercial power 140 through the parallel converter 190 in a stepless Since the inverter unit 120 continues to operate stably because it can be supplied in an uninterrupted power supply is possible, the supply or short-circuit of the abnormal voltage of the commercial power supply 140 Even if this phenomenon occurs, the inverter unit 120, using the stored electrical energy of the battery 150 because the error-load 157 is that the power supplied to the load is uninterrupted state 157 continues to operate normally.

In addition, even when only the commercial power source 140 is used, since the commercial power source 140 passes through the rectifier 180, the parallel converter 190, and the inverter unit 120, the harmful electrical components included in the commercial power source 140 are removed. Regardless of the input voltage waveform distortion, it is possible to supply the AC power of the constant voltage constant frequency of the pure sinusoidal waveform can be used safely and efficiently.

In addition, since the electrical energy of a stable voltage is continuously supplied through the inverter unit 120, frequent switching of the grid connection device 130 and an electric shock thereof may be prevented, and thus the use of the present invention and the load 157 is safe. This becomes possible.

Even if the operation of the inverter unit 120 stops due to an abnormality or failure of the present invention, the grid connection device 130 which is automatically operated and controlled is switched to the synchronous transfer switch 132 on the commercial power supply 140 side, and the emergency during maintenance. Since the maintenance switch 133 can be connected to the load 157 without any interruption, the load 157 may be continuously operated by receiving the commercial power 140, and in this case, power failure does not occur, so safer operation is possible. Of course it is possible.

In addition, there is an advantage that can be connected to the different or the same generators 105, 105-1 to each other to increase the power generation efficiency of the generator.

The present invention by the above configuration is provided with a rectifier and a DC reactor for booster function, a power semiconductor element for switching control, and a plurality of booster converters connected with a booster control circuit part of high efficiency and high power factor, and constitutes a rectifier for rectifying commercial power. The booster converter and the rectifier are connected in parallel to the parallel converter, respectively, and the DC power supplied to the inverter control unit is proportionally supplied through the commercial power or selects one of the shortages in proportion to the amount of generation power generated. It can be supplied and configured to operate as storage energy of storage battery through charging and discharging control unit. Can generate voltage, so use of various power generation It is possible to use natural energy efficiently, and even if the generated electric energy is weak, it can prevent the loss of weak power generation. It is excellent in efficiency, and it supplies stable high quality power that removes harmful elements even when using only commercial power. Can be used, if the power generation power is weak, it is possible to use the battery, and even if the present invention is stopped by failure or repair can be supplied with commercial power, and can supply electric energy in an uninterrupted manner, and use different electric generators It is possible to increase the power supply efficiency of the power generation.

Claims (3)

Electrical generators 105 and 105-1 for generating electricity by natural phenomena, Rectifier 110 for rectifying the DC power or AC power supplied from the electricity generating device 105, 105-1 to DC power,       Inverter unit 120 for receiving a DC power from the rectifier 110 to change to AC power, and       The AC power supplied from the inverter unit 120 is supplied to the load 157, and when the AC power is not supplied from the inverter unit 120, the commercial power 140 is switched to connect the commercial power 140 to be connected. The grid connection device 130 and A storage battery 150 connected between the rectifying unit 110 and the inverter unit 120 to charge a part of the DC power source; The grid-connected inverter device 100 is composed of a microcomputer control unit (C) and a digital interface unit (D) connected to the rectifier 110, the inverter unit 120, the grid connection device 130, the storage battery 150 to control. ); Booster converters 170 and 170-1 functioning as boosters together with the rectifier 110 to convert the weakly or unstablely generated electric energy into available energy in connection with the electric generators 105 and 105-1. ) Is configured, Rectifying unit 180 and the rectifying function is linked to the commercial power supply 140, The booster converter (170, 170-1) and rectifier 180 is a grid-connected type uninterruptible hybrid inverter having a booster function and a parallel converter function, characterized in that consisting of a parallel converter. The method of claim 1, The booster converters 170 and 170-1 And a direct current reactor (113) associated with the rectifier (110). A rectifying semiconductor 117 connected to the DC reactor 113 to rectify a reflux current accumulated in the DC reactor 113; After connecting the switching control power semiconductor 118 between the DC reactor 113 and the rectifying semiconductor 117, by connecting the booster control circuit unit 119 to the switching control power semiconductor 118 is composed of high efficiency, high power factor A grid-connected type uninterruptible power supply having a booster function and a parallel converter function, characterized in that a plurality of booster converters 170 and 170-1 are configured to be connected to different electric generators 105 and 105-1. Hybrid inverter device. The method of claim 1, The parallel converter 190 is connected to the rectifier 180 and the power semiconductor 191 and the current reactor 193 that can control the supply amount of commercial power, and A power semiconductor 195 and a current reactor 197 that are connected to the booster converters 170 and 170-1 to control the supply amount of the power generation power; It is composed of a parallel controller 200 connected to the power semiconductor (191, 195), The parallel controller 200 detects the voltage of the commercial power source and transmits a signal to the microcomputer control unit C. A generation power amount detection unit 203 which detects a voltage of the generation power and transmits a signal to the microcomputer control unit C; A parallel control instruction unit 207 which receives a signal from the microcomputer control unit C and sends a signal to the current amount control unit 205 to control the current amount of the commercial power source; And a current amount control unit (205) for receiving a signal from the parallel control command unit (207) and controlling a current amount of the commercial power supply (140). The system-type uninterruptible hybrid inverter having a booster function and a parallel converter function.

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