TWI313953B - Uninterruptible power supply and power outage backup system - Google Patents

Description

1313953 IX. Invention Description: Year and month record (more) is replacing page \PR 1 7 20 (19 ~ "一一一---- replacement page [Technical field of invention] The present invention relates to occurrence in commercial power supply In the case of an accident such as a transient voltage drop or a power failure, the uninterruptible power supply device and the power failure compensation system that supply power to the load without momentary interruption may be used.

In a device or system such as a network server or a semiconductor manufacturing device, since a power failure or a transient voltage drop (hereinafter referred to as instantaneous reduction) is severely damaged, a power supply device (UPS: uninterruptible power supply) is often used. ) as a backup power source when a power failure occurs. A general uninterruptible power supply device is provided with a battery (battery), and the battery is charged when the power supply is sound (usually), and when a power failure occurs, power is supplied from the battery to the device or the system to prevent the device or the system from being stopped. Or wrong action to make it function properly. In the power supply mode of the uninterruptible power supply device, there is a usual inverter mode (for example, refer to Patent Document 1) and a common commercial power supply mode. The constant current power supply device of the usual converter mode, regardless of the input power supply, often makes the output voltage constant, and does not cause frequency confusion. In addition, when there is a power failure, it is possible to switch to the backup power supply without interruption and supply power. However, since the uninterruptible power supply device of this type uses the converter circuit and the converter circuit, even if the power from the commercial power source is converted twice, the conversion loss occurs, and the efficiency is 8 5 . The degree of %, the power consumption of the uninterruptible power supply unit itself is a problem. In addition, the circuit used becomes complicated, so there will be a high price 94109738 6 1313953 ::,, „ 17» ....''. 口 '一. — 1 : 'ν'νί .................................................................................................................................................................................................................................................................................................................................................................................................... Direct output to the load, the output is switched to the battery supply power in the event of a power failure, so the power consumption of the constant power supply device itself is reduced, and the battery life is also long. In addition, the circuit used is reduced, and the structure is simplified. Therefore, it becomes cheap. The conventional uninterruptible power supply device of the commercial power supply mode has the structure shown in Fig. 8. Fig. 8 is a conventional power supply device of the prior art commercial power supply mode.

A connection diagram of the commercial power supply and load is connected. The input terminal of the uninterruptible power supply unit 1 0 1 is connected to the commercial power supply 1 0 8. The output terminal 1 0 7 is connected to the load 1 0 9. The uninterruptible power supply device 1 0 1 includes a measuring transformer 1 1 1 , a control unit 1 1 2, a semiconductor switch 1 1 3 , a battery 1 1 5 , a battery output measuring unit 1 16 , and a charger and a converter. The conversion unit 1 17 , the filter circuit 1 18 , the transformer 1 1 9 , and the interrupter 1 2 1 . The measuring transformer 1 1 1 detects the voltage value supplied from the commercial power source 108, and steps down the voltage value of the used power source to a predetermined voltage, and outputs it to the control unit 1 1 2 . When the voltage value of the battery output measuring unit 1 16 does not reach the specified value, the controller of the converting unit 1 1 7 charges the battery 1 15 . When the voltage value output from the measurement transformer 1 1 1 is equal to or less than the predetermined value, the control unit 11 2 interrupts the semiconductor switch 1 1 3 (the thyristor 1 1 3 a, 1 1 3 b ), and causes the conversion unit 1 1 7 The converter operates to supply power from the battery 1 15 to the load 1 0 9 . The semiconductor switch 1 1 3 is provided with a thyristor 1 1 3 a and a thyristor 1 1 3 b at 94109738 7 1313953 r-—---[APR 1 ? 2009

Yearly repair (more) replacement page replacement I Commercial power supply 1 0 8 When a power failure such as a short-circuit accident occurs, the load is separated from the commercial power supply 108. When the battery 1 1 5 is interrupted by a power failure, the battery 1 1 5 supplies power to the load 1 0 9 . The battery output measuring unit 1 1 6 measures the voltage/current of the battery 1 15 and outputs the result to the control unit 1 1 2 .

The charger of the conversion unit 117 is a converter that converts the AC power into DC power and charges the battery 115. Further, the converter of the converter 11 7 converts DC power into DC power and then outputs it. The filter circuit 118 is provided with a reactor 118L and a capacitor 118C, and is a high-frequency filter connected to the load side of the converter for absorbing noise generated when the power device inside the converter is switched. Transformer 119 converts the voltage supplied from commercial power source 108 to a specified voltage. Further, at the time of interruption of the semiconductor switch 113, the value of the voltage output from the converter of the converter 117 is converted into the voltage value of the commercial power source 108. The interrupter 121 directly supplies power from the commercial power supply 1 0 8 to the load 1 0 9 while the power supply device 101 is being maintained or the like. Next, the operation of the uninterruptible power supply device 101 will be described. The control unit 1 1 2 causes the semiconductor switch 1 1 3 to become Ο N, and the control unit 1 1 2 stops the converter of the converter 1 1 7 to stop the supply of electric power from the battery 1 15 . In this manner, power is supplied to the load 1 0 9 from the commercial power source 108. Further, at this time, when the voltage value of the battery 1 15 measured by the battery output measuring unit 1 1 6 does not reach a predetermined value, the controller 1 1 2 operates the charger of the converter 1 1 7 , 94109738 8 1313953 for the battery 1 1 5 charging, when the voltage value of the battery measured by the battery output measuring unit 1 16 is greater than the specified value, the charger of the converting unit 117 is stopped. When an accident occurs in the commercial power source 1 0 8 and the supply voltage is lowered, the control 1 1 2 At high speed (1 / 4 cycle or less), the voltage drop is detected by the measuring transformer 1 1 1 , and the semiconductor switch 1 1 3 is immediately opened, and the current transformer 1 1 7 b operates, and the battery 1 1 5 pairs The load 1 0 9 power supply user stops the load normally to prevent a malfunction from occurring before the battery 1 15 is exhausted. When the commercial power supply 1 0 8 returns to the sound state and the supply voltage becomes positive, the control unit 1 1 2 detects the change of the output voltage at a high speed (1 / 4 or less) by the measuring transformer 1 1 1 , and immediately causes the semiconductor switch 1 1 3 Closed, and the converter of the converter 1 17 is stopped, and the converter 1 1 charger is operated to charge the battery 1 15 . [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei No. Hei No. Hei. No. Hei. No. Hei. No. Hei. No. 5 - 6 4 3 8 8 (Problem to be Solved by the Invention) The method of the conventional power supply apparatus of the prior art, which is described in the conventional power supply mode, is detected. The voltage drop from the commercial power supply 1 0 8 causes the semiconductor switch 1 1 3 to open, and when the battery 1 1 5 supplies the power supply to the load 1 0 9 emergency, the switching takes half a cycle (8 ~ 10 msec) to a certain extent. A short break occurred during this period. Therefore, when the voltage is reduced even if the voltage is reduced to a short extent of 2 msec, the load of the semiconductor manufacturing device will be affected. When the power supply device of the usual commercial power supply mode cannot be used, the technology is expensive and the efficiency is not good. Converter Mode 2009 Page 115 The Ministry of Control changes the transmission. Make , can be a constant value to become a 7 APR 17 replacement 曰 repair (more) positive replacement page

After, after: force, between, between the situation, previous constant 94109738 9

1313953 The electric power unit is used as a backup power source. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an uninterruptible electric power device and a power failure compensation system which can convert a preliminary power supply to supply a power without a momentary interruption. (Means for Solving the Problems) The means for solving the above problems of the present invention are as follows. (1) It is characterized in that: an accident detecting means for detecting an accident of a commercial power source; and a high-speed current limiting interrupt means for supplying power from the power source to the load when the commercial power source is sound, and the accident detecting means detects In the event of an accident of a commercial power source, a circuit for interrupting the power supply from the commercial power source to the load; and a preparatory power source means to supply a specified force to the load immediately after the accident occurs, and when the accident detecting means detects an accident, the current limiting When the interrupted hand interrupts the above circuit, it is used to supply the necessary power to the load. In such a configuration, power is normally supplied from the commercial power source to the load, and when an accident occurs in the power source, the load is supplied from the standby power source means immediately thereafter. Therefore, unlike the conventional power supply device of the conventional commercial power supply system of the prior art, when an accident occurs in the commercial power source, power can be supplied from the backup power source without interruption. (2) It is characterized by: an accident detection means for detecting an instantaneous electric power reduction accident and a power failure accident of a commercial power source at a specified cycle; 326\Patent Specification (Replenishment)\94-07\94109738 10 to the source structure Paragraph, power supply, instantaneous pressure 1313953

'APR 1 7 replaces the high-speed current-limit interruption means, and has a single-phase rectifier bridge circuit including a high-speed switch for opening and closing the circuit of the commercial power source, and is directly connected to the two DC terminals of the single-phase rectifier bridge circuit. When the commercial power source is sound, the commercial power source supplies power to the load via the DC reactor, and when the accident detecting means detects the accident of the commercial power source, the high-speed switch interrupts the circuit for supplying power from the power source; and the preparation In the power supply means, a filter circuit including an AC reactor, a converter, and a DC power supply are connected in series, and the PQ control is performed on the commercial power source 3 to make the effective power and the invalid power supplied to the load become zero. When the detection means detects the commercial power source, the PQ control is stopped, and the responsiveness of the PQ control is set to be longer than the accident confirmation cycle of the accident detecting hand commercial power supply. In such a configuration, when the commercial power source is sound, since power is not supplied from the power supply device, power is supplied only from the commercial power source, and the high-speed current limiting interruption means performs PQ control from the commercial power source to the load power via the DC reactor. Both the effective and reactive powers supplied to the load by the preparatory power means are zero. In addition, in the normal state, since the impedance of the DC converter appears to be 0, the reactor does not adversely affect the commercial power supply when the commercial power source is sound, and the power can be stably supplied from the commercial power load. Therefore, when the commercial power source is sound, power is not supplied from the reserve power source means, so that the constant power source can efficiently supply power only to the load from the commercial power source. 2009 supply, and galvanic power, when the commercial power is detected above, the power failure of the accident section is therefore supplied to the power reactor. Because the device 94109738 11 1313953

Further, in such a configuration, the accident detecting means performs the accident detection at a predetermined cycle. Since the power is not instantaneously interrupted during the period from the occurrence of the accident to the detection of the accident, the responsiveness of the PQ control is set to be higher than that. The accident detection period of the commercial power source of the accident detection means is long. Therefore, even if a transient voltage drop accident or a power failure occurs in the commercial power supply, the PQ control cannot be immediately followed, so the PQ control continues to be performed under the same system conditions as before the accident. At this time, in the case where an accident occurs on the system side, since the P Q control is performed under the system conditions before the occurrence of the accident, the PQ control cannot be performed correctly. That is, the correct PQ control in the manner in which no load current flows is performed, causing a current to flow from the preparatory power source to the system. In the present invention, with the current at this time, the voltage is supplied to the load by the partial pressure of the DC reactor and the AC reactor. Then, at the next accident detection timing, the PQ control is stopped. After the stop, power is supplied from the preliminary power source means. According to the above aspect, during the period from the occurrence of the accident to the detection of the accident sequence, the load and the accident point are supplied with electric power from the preliminary power source means without interruption. Further, in the present configuration, when the accident detecting means detects an accident such as an instantaneous decrease in power supply or a power failure, the PQ control is stopped at the preparatory power source means, and the high-speed switch is interrupted by the high-speed current limiting interrupt means to interrupt the circuit. The power is separated. Therefore, after the high-speed current limiting interrupt means interrupts the circuit, the necessary power can be supplied from the preliminary power supply means, and the voltage to the load is not lowered. (3) It is characterized in that: the allowable voltage reduction rate for the load is set to A%, the above-mentioned AC reactance 12 326\patent specification (supplement)\94-07\94109738 1313953

When the impedance of the above-mentioned DC reactor is set to (1 0 0 Z ) / A or more, the impedance of the above-mentioned DC reactor is set to be a. In such a configuration, even in the event of a ground fault or accident in the commercial power source, the voltage of the standby power source is divided by the DC reactor and the reactor, and the voltage of the load is not lower than the allowable voltage reduction rate. (4) A control means for controlling the electric power of the preparatory power source means that the voltage of the commercial power source is substantially in phase and has the same amplitude. In such a configuration, the voltage of the commercial power source and the voltage of the standby power source are controlled so that the phase and the amplitude are substantially the same value. Therefore, when the power source is in an accident, the load is supplied from the standby power source and the power is not deviated from the amplitude. . In addition, at the time of PQ control, control is performed to make the current zero, and the converter is normally driven. Therefore, the phase of the pre-system and the phase of the converter are used to supply the power of the power source after the above-mentioned accident occurs, so that the phase is continuous. (5) The high-speed switch is a pair of thyristors, and the single-phase rectifier bridge is connected to at least one of the two AC terminals to connect the two AC terminals of the pair of thyristor rectifier circuits to the commercial Since the power supply and the negative are in such a configuration, since a pair of gate fluids are used as the rectifying electric high-speed switch, the circuit for supplying electric power from the commercial power source can be interrupted at a level of 10 msec from the occurrence of the commercial power source accident. In addition, in the event of an accident, when the circuit between the commercial power supply and the load is interrupted by the thyristor, the semiconductor rectifying element can be used to make the induction of the DC reactor. The 2009 short-circuit AC voltage and the electric current phase load are first applied. From the circuit, upload. When the road is at the power source, electric 94109738 13

1313953 Potential short circuit. (6) It is characterized in that: an uninterruptible power supply device is provided with: an accident detecting means for detecting an accident of a power source; and a high-speed current limiting interrupt means for supplying a load from the commercial power source when the commercial power source is in a healthy state The electric power, when the accident detecting section detects the accident of the commercial power source, is used to interrupt the circuit for supplying power from the commercial source to the load; and the preliminary power supply circuit supplies the specified power to the load immediately after the accident, when the accident The detecting means detects an accident, and the current limiting interrupt means supplies the necessary power to the upper load when the circuit is interrupted; and the emergency generator starts when the high-speed current limiting interrupt means interrupts the circuit and passes the designated time; And a switch for switching the connection between the load and the commercial power source and the emergency generator. Further, the present invention is characterized in that: an uninterruptible power supply device includes: an accident detecting means for detecting an instantaneous electric power reduction accident and a power failure accident of a commercial power source at a predetermined cycle; and a high-speed current limiting interruption means provided with the commercial power supply a single-phase rectifier bridge circuit for opening and closing a high-speed switch for supplying power to a circuit, and a DC reactor connected between two DC terminals of the single-phase rectifier bridge circuit, and when the commercial power source is sound, the commercial power source is passed through the DC current reactance The device supplies power to the load, and when the accident detecting means detects an accident of the commercial power source, the high-speed switch is interrupted from the commercial 326\patent specification (supplement)\94-07\94109738 14 Press and power up 1313953 APR 1 7 2009 Replace the page source to supply power to the circuit; and the preparatory power means, connected in series with a filter circuit including an AC reactor, a converter and a DC power supply, in the above commercial power supply When it is sound, PQ control is performed to supply the effective power and the invalid power to the above load. When the accident detecting means detects the accident of the commercial power source, the PQ control is stopped, and the necessary power is supplied to the load. The responsiveness of the PQ control is set to be confirmed by the accident of the commercial power source of the accident detecting means. Long cycle

The emergency generator is activated when the high-speed current limiting interrupt means interrupts the circuit and passes the specified time; and a switch is used to switch the connection between the load and the commercial power source and the emergency generator.

In the event of an accident in the commercial power supply, in the near future, the necessary power can be supplied to the load from the preliminary power supply means. When the voltage is passed for a certain period of time, the voltage of the DC power supply of the standby power supply means is lowered, so the load cannot be applied. Supply the necessary power. In the above configuration, before the voltage of the DC power source is lowered, the emergency power generator cannot be started, and the emergency power generator is started, and the switch is switched to supply power from the emergency power generator to the load, and the power can be continuously continued. Power is supplied to the load steadily. (Effect of the Invention) In the case of the uninterruptible power supply device according to the first aspect of the patent application, since the power is supplied from the commercial power source to the load, when the commercial power source is in an accident, the power is supplied to the load from the standby power source. With previous skills 94109738 15

1313953 The uninterruptible power supply unit of the normal commercial power supply mode is different from the power supply when the power supply accident occurs. In the case of the uninterruptible power supply unit according to the second application of the patent scope, when the power supply is sound, the load is not supplied from the standby power supply means. Only the commercial power supply supplies power to the load. In addition, after the circuit is interrupted in the high-speed limit, the voltage to the load is not reduced, and the necessary power can be supplied by the source means. In the case of a grounding accident or a short-circuit accident in the power supply of the uninterruptible power supply unit according to item 3 of the patent application scope, since the voltage of the means is divided by the DC reactor and the AC reactor, the voltage of the applied load is not lower than The power that allows the voltage reduction rate. According to the fourth embodiment of the patent application scope, the voltage of the power supply and the voltage of the preliminary power supply means are controlled so that the amplitudes become substantially the same value, so that when the commercial power supply occurs, the load is immediately supplied from the preliminary power supply means. Supply electricity. In the case of an uninterruptible power supply unit according to item 5 of the scope of the patent application, the power supply circuit can be supplied with power from the time when the power supply has an accident of 1 〇 m s e c. In addition, in the event of a power failure, when the circuit between the commercial power supply and the load is interrupted, the flow element can be used to short-circuit the induced electromotive force occurring in the reactor. According to the power reduction of the power failure compensation system of the sixth or seventh application of the patent application scope, before the power can be negatively converted from the preliminary power supply means, the load can be continued from the emergency generator to the load 326 (supplement)\94 -〇7\94109738 16 , in the commercial source to supply electricity, in commercial power, you can interrupt the hand from the reserve power, in the commercial reserve power supply can be available, because the commercial phase and vibration, can be, from the commercial off from commercial use The thyristor is fully charged and supplied to the ground in a straight load.

1313953 Ground supply of electricity. [Embodiment] Fig. 1 is a schematic configuration diagram of an uninterruptible power supply device according to an embodiment of the present invention. The uninterruptible power supply device according to the embodiment of the present invention is constructed such that power is supplied to the load in a commercial power supply mode, but when power failure or transient reduction occurs, compensation is performed without interruption. The uninterruptible power supply device 1 is provided with an accident detecting unit 2, a high-speed current limiting intermediate portion 3, a preliminary power supply unit 4, and a bypass unit 5, wherein the input terminal 6 is connected to the commercial power source 8, and the output terminal 7 is connected to the load 9. The accident detecting unit 2 is composed of a measuring transformer 1 1 and a control unit 1 2 . The high speed current limiting interrupt unit 3 is formed by a bridge circuit 13 and a DC reactor 14 which are single phase rectification bridge circuits. The preliminary power supply unit 4 includes a battery 15 that is a DC power supply, a battery output unit 16 , a conversion unit 17 , a filter circuit 18 , a transformer 19 , and an electric output measurement unit 20 . The bypass unit 5 is constituted by an interrupter 21. The accident detecting unit 2 is for detecting a power failure or a power failure when the commercial power source 8 is in a power failure. The high-speed current limiting interrupt unit 3 interrupts the circuit between the commercial power source 8 and the load 9 when an electric power failure occurs in the commercial power source 8. When the commercial power source 8 has a power failure, the pre-charging unit 4 supplies the power to the load 9. The bypass unit 5 skips the high-speed current limiting interrupt unit 3 and the preliminary power supply unit 4, and directly connects the commercial power source 8 and the load 9. The measuring transformer 1 1 measures the AC voltage of the commercial power source 8 and outputs the result to the control unit 12 . The control unit 1 2 controls the opening and closing operation of the bridge circuit 13 based on the voltage measurement result of the commercial power source 8 output from the measurement transformer 1 1 or converts the 326\patent specification (supplement)\94-07\9410973 8 17 The charging or output action of the 1313953 1 7 part of the instantaneous source of the measured source. Further, the control unit 12 controls the charging operation of the converting unit 17 based on the measurement result of the battery output measuring unit 16. Further, the control unit 1 2 controls the output power of the conversion unit 17 based on the measurement result of the power supply output measuring unit 20. Further, since the control unit 12 supplies electric power from the preliminary power supply unit 4, even if a power failure occurs in the commercial power source 8, the operation is not affected. Further, the control unit 12 detects a signal output from the measurement transformer 1 1 , the battery output measurement unit 16 , and the power supply output measurement unit 20 every 1/4 cycle.

number. The bridge circuit 13 is composed of two (one pair) thyristors 1 3 a, 1 3 b and two (one pair) diodes 1 3 c and 1 3 d, and has two AC terminals. 1 3 a 1, 1 3 a 2 and 2 DC terminals 1 3 d 1, 1 3 d 2 . A cathode of the thyristor 1 3 a and a cathode of the thyristor 1 3 b are connected to the AC terminal 1 3 a 1 , and a cathode of the diode 1 3 c and a diode 1 3 d are connected to the AC terminal 13 3 a 2 . anode. In addition, a cathode of the thyristor 1 3 a and a cathode of the diode 13 d are connected to the DC terminal 1 3 d 1 , and an anode and a diode 13 of the thyristor 1 3 b are connected to the DC terminal 13 d 2 . The anode of c. Further, a DC reactor 14 is connected between the DC terminal 1 3 d 1 and the DC terminal 1 3 d 2 . Further, an input terminal 6 connected to the commercial power source 8 is connected to the AC terminal 13 3 a 1 , and an output terminal 7 connected to the load 9 is connected to the AC terminal 13 a 2 . Further, in the bridge circuit 13, the AC terminal 1 3 a 1 may be connected to the output terminal 7 and the AC terminal 13a2 may be connected to the input terminal 6. The DC reactor 14 is used to limit the flow of current from the preliminary power supply unit 4 to the commercial power supply 8 when a power failure occurs in the commercial power supply 8. 18 326 profit-making manual (supplement)\94-07\94109738 1313953 year-end repair (more) replacement page APR 1 7 2009 replacement page battery 1 5 stored in the commercial power supply 8 when power failure or instantaneous reduction, load 9 Supply of electricity (electric energy). The battery output measuring unit 16 includes a DC measuring current transformer and a DC measuring transformer (not shown) for measuring the DC voltage and the DC current of the battery 15, and outputs the result to the control unit 12.

The converter 1 7 is provided with a charging unit (converter) 17a and a converter 1 7b (not shown). The charging unit 17a is for floating charging the battery 15, and converts the alternating current power into a direct current power based on a control signal output from the control unit 12. Further, the current transformer 1 7b is for supplying electric power to the load 9, and converts the direct current power stored in the battery 15 into alternating current power based on a control signal outputted from the control unit 12. In addition, it is also possible to construct a method of charging the battery 15 by means of a charger separation method (DC switching method). In this case, the conversion unit 17 is composed only of the current transformer 1 7 b, and is additionally provided with a charger. independent.

The filter circuit 18 is provided with a reactor 18L and a capacitor 18C, and serves as a high-frequency filter for absorbing noise generated when the power device is turned on and off inside the converter. The transformer 19 is used to step down the voltage of the commercial power source 8 to a specified voltage or to boost the output voltage of the converter 1 7 b to substantially the same voltage as the commercial power source 8. The power supply output measuring unit 20 includes an alternating current measuring current transformer 20 a and an alternating current measuring transformer 2 0 v for measuring the current transformer current and the load voltage, and outputs the result to the control unit 12 . The interrupter 21 is switched to a closed state via 94109738 19 1313953 during maintenance or failure of the uninterruptible power supply device 1, and is used to bypass the uninterruptible power supply device 1 to directly supply power to the load 9 from the commercial power source 8. .

Here, the constant current power supply device 1 has an impedance of substantially zero when viewed from the AC side during normal operation, and only exhibits a large impedance when an accident occurs. In this manner, the current decay time constant and the system frequency are set as follows. The relationship between cycles. The graph of Figure 2 shows the relationship between the current decay time constant for the AC power cycle and the equivalent impedance. In the uninterruptible power supply device 1 constructed as described above, the reactor component and the resistance component of the reactor 14 and a pair of gate fluids 1 3 a, 1 3 b and a pair of diodes 1 3 c The current decay time constant determined by the bridge circuit 13 formed by 1 3 d, and the equivalent impedance seen from the system side, as shown in Fig. 2, the larger the current decay time constant, the smaller the equivalent impedance . On the other hand, the circuit impedance during normal operation is preferably as small as possible. The DC reactor generally selected here is to suppress its own current to three times the rated current in the event of a system short circuit accident. That is, it becomes an impedance of 3 3 % based on the rated current of the bridge circuit 13 . On the other hand, as described above, in the normal operation state, it is preferable to make the equivalent impedance as small as possible, and practically satisfy the rated current reference of 3%, that is, the equivalent impedance shown in Fig. 2 in the DC reactor. The AC impedance shown by L is 0. 0 9 pu (= 3 % / 3 3 % ). Therefore, the current decay time constant of the continuous power source device is set to 2.5 times or more of the system frequency cycle according to Fig. 2. The detailed structure of the control unit 12 will be described below. Figure 3 is a block diagram of the control unit of the uninterruptible power supply unit. The control unit 1 2 includes a voltage determination unit 31, a thyristor control unit 3, a synchronization signal generation unit 33, and a self-operation phase signal 20 326\patent specification (supplement)\94-07\94]09738 APR The power supply 1313953 is used as the processing unit 34, the changeover switch 35, the PQ calculation unit 36, the PQ control changeover switch 38, the battery state determination unit 39, the output voltage reference normalization unit 40, and the converter output control unit 41. The voltage determination unit 31 receives a voltage corresponding to the AC voltage value of the source 8 output from the measurement transformer 1 and a predetermined set value, and the voltage of the power supply 8 is lower than a predetermined set voltage value or a set voltage value. , or complex power is the specified set voltage value. Then, the signal corresponding to the determination result is output to the thyristor control unit 32. When a momentary decrease or a power failure occurs, the voltage is judged; and the battery state determination unit 39 outputs a signal for transmitting the information. The thyristor control unit 32 controls the opening and closing (pointing and extinction) of the thyristor fluids based on the sluice fluid 1 3a outputted from the sluice fluid point signal output from the voltage determining unit 31 to the bridge circuit 13. The synchronizing signal generating unit 3 3 generates a signal for synchronizing the voltage of the preliminary power supply unit 4 with the output voltage of the commercial power source 8, and outputs the signal to the output voltage reference sine wave generating unit 40 via the switching signal. Further, the same processing unit 3 3 outputs the signal to the self-operating phase signal 34° self-operating phase signal generating unit 34, and the self-operating circuit is installed in the circuit between the commercial power source 8 and the load 9 by the uninterruptible power supply. To make the phase signal of the output voltage. Further, the self-operating phase forming unit 34 controls the output voltage of the commercial power source 8 based on the signal output from the synchronizing signal 3 3 when the commercial power source 8 is sound. 1 7 2009 The page change unit 37, the sine wave is designated by the commercial power determiner, and the quotient is generated by the bit signal when the quotient is part of the 3rd, the 13b, and the output power 35 is set to 1 in the signal. Part-matching 94109738 21 1313953 The sword is more than the footer 17» * -------------^ The switch 3 5 is operated in accordance with the switch control signal output from the voltage determining unit 31 Switch. In other words, when the commercial power source 8 is in a healthy state or the AC voltage of the commercial power source 8 is re-energized, the switch 3 is outputted from the synchronization signal generating unit 3 to the voltage reference sine wave generating unit 40. 5 to switch. On the other hand, when the AC voltage of the commercial power source 8 is lower than the predetermined set voltage, the signal is output from the self-operating phase signal generating unit 34 to the output voltage reference sine wave generating unit 40, so that the switch 35 Switch.

The P Q calculation unit 36 performs calculation based on the current transformer current and the load voltage measured by the power supply output measurement unit 20, and makes the effective power and the reactive power supplied from the preliminary power supply unit 4 zero. The PQ control unit 37 generates phase information and amplitude information of the AC voltage (sine wave) output from the converter 1 7 b based on the calculation result of the PQ calculation unit 36, and outputs the information to the information via the changeover switch 38. This output voltage reference sine wave is created 40.

The changeover switch 38 is switched in accordance with the switch control signal output from the voltage determination unit 31. In other words, when the commercial power source 8 is in a healthy state or the AC voltage of the commercial power source 8 is restored, the switch 3 is caused to output a signal from the PQ control unit 37 to the output voltage reference sine wave generating unit 40. 8 to switch. On the other hand, when the voltage of the commercial power source 8 is lower than the predetermined set voltage, the switch 38 is switched so as not to output a signal to the output voltage reference sine wave generating unit 40. Further, in the description of the operation described later, the changeover switches 35 and 38 described are latch-type switches. The battery state determining unit 39 outputs the electric power according to the battery output measuring unit 96. 94109738 22

1313953

§!:More) The result of measuring the DC voltage and DC current of the negative ί af pool 1 5 is judged to determine whether the battery needs to be charged or fully charged. Then, phase information corresponding to the determination result is generated in the output voltage reference sine wave 4 ,, and is output to the output control unit 41. Further, when the quotient 8 is instantaneously lowered or the power is turned off, the battery state determining unit 3 9 outputs a signal stop phase signal output from the voltage determining unit 31 to stop the charging of the battery 15. The output voltage reference sine wave generating unit 40 generates a signal output from the self-operating phase signal generating unit 34 based on the signals output from the synchronizing signal 3 3, the PQ control unit 37, and the battery state determining unit 39, and the generator 17 The information on the phase and amplitude of the sine wave voltage outputted by b is output to the converter output control unit 41. The converter output control unit 41 outputs a signal for controlling the power output from the conversion unit 17 based on the signal output from the output voltage reference sinusoid 40, or outputs the charger 17a for charging 1 Control signal. The following mainly describes the operation of the uninterruptible power supply according to Figs. 3 and 4. Fig. 4 is a schematic view for explaining an uninterruptible power supply device. The uninterruptible power supply unit 1 is powered by normal commercial power supply, but can be compensated instantaneously in the event of a power outage or instantaneous decrease. (A) When it is sound (when commercial power supply is supplied) When the commercial power supply device 8 is sound, that is, when there is no power failure at the source 8, and the power supply unit 4 does not instantaneously reduce or the power failure occurs, the preparatory power supply unit 4 supplies power to the load. Only from the commercial power supply 8 η 1 7 2009 卜 page change L 15 is the power supply for the converter, stop generating the part number, or change the information wave to create. 1 7b Dianchi 15 Device 1 1 The load supply interrupts commercial power, not from ¥ power. 94109738 23 1313953 In the uninterruptible power supply device 1, as shown in FIG. 4(A), the thyristor 1 3 a and the thyristor 1 3 b of the high-speed current limiting interruption unit 3 are controlled to be in a closed state of the point lead, from The commercial power source 8 supplies electric power to the load 9 via the high speed current limiting interrupt unit 3. In the DC reactor 14 of the high-speed current limiting interrupt unit 3, since the current flows in the same direction often, the impedance of the DC reactor 14 appears to be zero, viewed from the side of the AC terminal 1 3 a 1 , 1 3 a 2 The impedance is zero.

The preliminary power supply unit 4 is controlled so that power is not supplied to the load 9 when the commercial power source 8 is sound. In other words, the preparatory power supply unit 4 performs control (hereinafter referred to as P Q control) to make either the effective power P and the reactive power Q supplied to the load 9 zero. Further, the conversion unit 17 of the preliminary power supply unit 4 performs: DC voltage control for performing floating charging of the battery 15; and output voltage control for outputting a voltage substantially in phase/same amplitude with the commercial power source 8. Next, the operation of each part of the control unit 12 in the case of sound is explained. In the control unit 12, the signal output from the measuring transformer 1 1 is detected every 1/4 cycle in accordance with the above-described manner. When the voltage is in the normal state, the voltage determination unit 31 outputs a signal output from the synchronization signal generation unit 33 to the voltage reference sine wave generation unit 34, and outputs a signal for switching the changeover switch 35. Further, the voltage determination unit 31 outputs a signal for switching the changeover switch 38 so as to output a signal from the P Q control unit 37. Further, when the battery state determining unit 39 determines that the battery 15 is not in the fully charged state, the voltage determining unit 31 outputs a signal to the battery state determining unit 39 in order to charge the battery 15. Further, the voltage determining unit 31 outputs to the thyristor control unit 32 a signal that the gate fluids 1 3 a and 1 3 b of the bridge circuit 13 become Ο N 32 24 6\patent specification (supplement)\94-07\ 9410973 8 1313953

4PR 1 7 2009 Replace page number. When the thyristor control unit 32 detects the signal, it outputs a thyristor point signal. Further, when the commercial power source 8 is sound, the thyristors 1 3 a and 1 3 b are often in a spot state (ON state). (PQ Control) When the above-described PQ control is performed, the control unit 1 2 controls the output from the preliminary power supply unit 4 to the load so that the effective power P and the reactive power Q supplied to the load 9 are both zero. The current of 9 becomes zero. Figure 5 is an equivalent circuit and vector diagram of an uninterruptible power supply unit. In FIG. 5(A), the output voltage of the commercial power source 8 is set to VI, the voltage of the preliminary power supply unit 4 becomes V2, the voltage of the load 9 becomes VL, the reactor of the commercial power supply 8 side becomes x1, and the reactance of the preliminary power supply unit 4 Becomes X 2 . Further, the current I1 flows from the commercial power source 8 to the preliminary power supply unit. The current I2 flows from the preliminary power supply unit 4 to the load current I3 from the commercial power supply 8 to the load 9. In addition, in the following description, V Z 0 v is referred to as a voltage vector V, and I Z 0 I is referred to as a current vector I. When the voltage vector V2 of the preliminary power supply unit 4 and the voltage vector VL of the load voltage are the same, the current does not flow from the preliminary power supply unit 4 to the load 9. Further, in this case, the current vector I 1 and the current vector I 2 may be made equal in magnitude and opposite in direction. In the case where the relationship can be satisfied, the relationship of the vectors becomes as shown in Fig. 5(B). Further, in the figure, the voltage vector V(xl+x2) is the addition of the voltage vector Vx1 of the reactor x1 and the voltage vector Vx2 of the reactor x2. In order to satisfy the above relationship, the PQ calculation unit 36 calculates the effective power P and the reactive power Q based on the converter current and the load voltage measured by the power supply output measuring unit 20. Then, the P Q control unit 37 becomes active power P = 0, 94109738 25 1313953

曰KUlO is replacing i

_ 1 7 2GMj replaces I to calculate the specified value 校正 to correct the phase of the sine wave voltage output from the converter 1 7 b. Further, in order to become the reactive power Q = 0, the specified value 算出 is calculated to correct the amplitude of the sine wave voltage output from the converter 1 7 b. Then, the P Q control unit 37 outputs the calculated information of Δ 0 and Δ A to the output voltage reference sine wave generating unit 34.

The output voltage reference sine wave generating unit 34 generates a reference sine wave based on a signal output from the P Q control unit 37 or the like. When a sine wave is generated based only on the signal output from the PQ control unit 37, the sine wave voltage output from the converter 1 7 b becomes V2 = (A + AA) sin(wt + Δ Θ ) (Expression 1 ). Therefore, the output voltage V2 of the current transformer 17b becomes the above equation, and the electric power supplied from the preliminary power supply unit 4 to the load 4 can be made zero.

Further, the relationship between the phase Δ 0 of the voltage V 2 outputted from the preliminary power supply unit 4 and the effective power P, and the relationship between the amplitude Δ A of the voltage V 2 outputted from the preliminary power supply unit 4 and the reactive power Q are corrected. The calculation can be easily performed based on the impedance of the commercial power source 8 connected to the uninterruptible power supply device 1 or the impedance of the uninterruptible power supply device 1. (Charging Control) Further, in the control unit 12, charging control of the battery 15 is performed as described above. In other words, the battery state determination unit 39 judges whether or not the battery 15 needs to be charged or is fully charged, based on the measurement results of the DC voltage and the DC current of the battery 15 output from the battery output measuring unit 16. When the battery 15 needs to be charged, the battery state determining unit 39 causes the current to flow from the charger 17 7 of the converting unit 17 to the battery 15 to charge the battery 15, 94109738 26

1313953 Make phase information. The information generated by the battery state determining unit 39 is output to the output voltage reference sine wave generating unit 40 as information for correction for correcting the phase of the output voltage from the converter 1 7 b. On the other hand, in the state in which the battery 15 is fully charged, the state determining unit 39 does not create a phase signal, and does not feed the phase to the output voltage reference sine wave generating unit 40. In addition, this control is not required when the battery 15 is operated by the charger separation method. (Prepared power supply output balance control) When the control unit 12 generates a voltage in the phase/vibration of the voltage waveform output from the preliminary power supply unit 4 when an instantaneous decrease or a power failure occurs, the control unit 1 performs control so that the preliminary power supply unit 4 is controlled. The amplitude/amplitude of the output current amplitude and the output voltage of the commercial power source 8 is generated by the measurement transformer 1 1 based on the result of the commercial AC voltage measurement, and the output chord generation unit 40 is output via the changeover switch 35. And outputting the information of the output voltage of the commercial power source 8. The output voltage reference sine wave generating unit 40 is used to correct the phase output from the converter 1 7 b based on the information output from the generating unit 3 3 . In this manner, when the commercial power source 8 is sound, the control of the above-described manner is performed, and the output voltage reference sine wave is made; the amplitude or phase from the synchronization signal generating unit 33, the PQ control unit 37, and the electric unit 39 The correction information is used to generate the information of the phase and amplitude of the sine wave voltage from the converter, and the information is transmitted to the APR 1 7 2003 ” to replace the page phase signal. When the sinusoidal wave is used, the information of the electric number is charged and charged. In the case, there is no bias voltage phase/step for the input & Synchronous power supply 8 voltage reference positive phase/amplitude Synchronous signal generated sine wave Control unit 1 2 ί part 4 0 according to state determination 17b output out to converter 94109738 27

1313953 Month 嗲 (more) 瞀 瞀 APR 1 7 2009 Replacement page Output control unit 41. Further, the converter 17 operates in accordance with a signal output from the converter output control unit 41. (B) At the time of the accident, when the power supply device 1 generates a power failure in the commercial power source 8 and instantaneously reduces or powers down, the power supply unit 4 supplies power without interruption. That is, as shown in Fig. 4(B), the preliminary power supply unit 4 immediately supplies a current (output voltage control) to the accident point as a voltage source, and supplies the electric power stored in the battery 15 to the load 9. When the accident detecting unit 2 detects an instantaneous drop or a power failure, the brake fluid of the high speed current limiting interrupt unit 3

Stop PQ 1 3 a, 1 3 b output interrupt signal. At this time, the preparatory power supply unit controls the charging load voltage V L for stopping the battery 15 to be the voltage determined by the voltage division of the DC reactor 14 and the AC reactor 18. That is, when the battery voltage is Vs, the impedance of the DC reactor 14 becomes Z1, and the impedance of the AC reactor 1 8 L becomes Z 2 , the load voltage VL becomes (Expression 2) VL = Z1 / (Z1+ Z2) xVs (accident) In the uninterruptible power supply unit 1, every 1 / 4 of the cycle detects a power failure such as a transient voltage drop or power failure of the commercial power supply. Further, when the commercial power source is sound, PQ control is performed so as to supply electric power from the preparatory power source unit 4. On the other hand, when a power failure occurs, power is supplied to the load 9 and the accident point from the preliminary power supply unit 4 without interruption, so that the control described below is performed. 94109738 28 1313953 Next, the operation of each part of the control unit 12 at the time of occurrence of an accident will be described. Figure 6 is a diagram showing the output voltage waveform and control timing of the uninterruptible power supply unit. The sine wave voltage shown in Fig. 6 is output from the commercial power source 8. The control unit 12 detects the signal output from the measuring transformer 1 1 every 1/4 cycle as described above. As shown in FIG. 6, the voltage determination unit 31 detects from the occurrence of the instantaneous decrease or the power failure ((1) shown in FIG. 6) to the longest 1/4 cycle (50 msec in the case of 50 Hz) (within 11 periods) Instantaneous reduction or power failure ((2) shown in Figure 6).

In the uninterruptible power supply device 1, when an instantaneous reduction or a power failure occurs, the power supply unit 4 immediately starts supplying power to the accident point of the commercial power supply 8 and the load 9, and continuously supplies power to responsiveness of the PQ control. The setting is from 10 msec to several hundred msec, which is longer than the period in which the control unit 12 detects a power failure of the commercial power source. Therefore, even if there is a transient voltage drop accident or a power failure accident in the commercial power supply, since the response of the PQ control cannot be immediately followed, the P Q control is continued with the same system conditions as before the accident. At this time, one of the accidents occurs on the system side (the commercial power source 8 side), and since the PQ control is performed under the system conditions before the occurrence of the accident, the PQ control cannot be performed correctly. That is, the PQ control cannot be performed correctly without flowing the load current, causing a current flow from the preliminary power supply unit 4 to the system. In the present invention, with the current at this time, the load is continuously supplied to the load 9 by using the DC reactor 〖4 and the voltage dividing action of the AC reactor 18.8 L. According to this configuration, even when a power source accident occurs, the power supply unit 4 performs the same control as when the power source is sounded in a short period of time, so that the control that the effective power P and the reactive power Q supplied to the load 9 are zero is not performed. 326\ patent specification (supplement)\94-07\9410973 8

According to the 1313953 system, it is possible to immediately supply power from the pre-supply power supply to the commercial power supply 8 and the load 9. At this time, since the current from the preliminary power supply unit 4 to the accident load 9 of the commercial power source 8 flows, the load voltage VL becomes a voltage determined by the voltage division of the direct current power source 14 and the alternating current reactor 18.8 L. Therefore, when the allowable voltage drop rate of the load 9 is A % 'the impedance of the AC reactor 18 L, the impedance Z1 of the DC reactor 14 can be set to be greater than (1 Ο Ο Z 2 )/A, The electric power output from the preliminary power supply unit 4 to the load 9 is a value larger than the allowable voltage reduction rate. For example, the allowable voltage reduction rate for the load 9 is 10 °/. In the case where the ratio of the impedance Z 2 of the AC reactor 1 8 L and the Z 1 of the DC reactor 14 is set to Z 1 : Z 2 = 1 0 : 1, the voltage output from the load 9 of the preliminary power supply unit 4 can be made. The reduction rate is 10% or less. (Accident Detection) The uninterruptible power supply device 1 stops the P Q control at the accident detection timing (Fig. (3)). Further, after the P Q control is stopped, electric power is supplied from the preparatory unit 4. When detecting a power failure, the voltage determination unit 31 of the control unit 1 1 outputs a signal of the operation phase signal generation unit 34, and outputs it to the output voltage sine wave generation unit 40, thereby outputting the changeover switch 35. signal. Further, the voltage determination unit 31 stops the P Q of the preliminary power supply unit 4 to control the supply of electric power to the load from the preliminary power supply unit 4, and outputs a signal for switching the changeover switch. In this way, when the point of the PQ control unit 3 7 326\patent specification (supplement)\94-07\94109738 30 and the resistance of the reactor are Z 2 pressed, the impedance will be switched from the reference to the 6 power sources. 'Letter 38

No. 1313953, the output is stopped toward the output voltage reference sine wave generating unit 40. Further, the voltage determination unit 31 outputs a signal to the battery state determination unit 39 to stop charging of the battery 15. Further, the output voltage reference sine wave unit 40 generates a sinusoidal voltage based on the information of the information from the self-operating phase signal generating unit 34, and outputs a signal to the converter output control unit 41. Therefore, the power supply unit 4 continues to supply electric power to the accident point of the commercial power source 8 and the load 9. When detecting the instantaneous decrease or power failure, the voltage determination unit 31 outputs, in addition to the upper operation, the sluice fluid control unit 32 for causing the bridge circuit 1 3 fluids 1 3 a, 1 3 b to become 0 FF (arc). signal. When the thyristor control detects this signal, the output of the thyristor jog signal is stopped. However, when the load current is not zero, the fluids 1 3 a and 1 3 b do not become 0 FF, and the sluice fluid control unit 32 stops the output of the sluice fluid and then performs the arc suppression (Fig. 6 (4)). Therefore, as shown in Fig. 6, during the period in which the instantaneous reduction or power failure occurs until the thyristor enters the arc (= tl + t2), a maximum of 1/2 cycle is required (10 ms in the case of 50 Hz but in the event of an accident to the accident) During the period from the detection, the load is supplied to the load and the accident point without interruption. In addition, the PQ control is to control the load current to zero, and the converter 1 7 b is often driven. By presetting the voltage phase of the (commercial power supply 8) and the voltage phase of the current transformer 1 7 b, the output voltage from the preliminary power supply unit 4 after the power failure occurs causes the phase to continue. (C) Compensation No. 2009 No. 1, It is made (the phase output is prepared as the gate 32, the gate is at msec in the slave ec), but the system is first replaced by 94109738 31 1313953 APR 1 7 2009. The brake fluid 1 3 a is replaced by the high-speed current limiting interrupt unit 3, When 1 3 b is arc-extinguish, when the circuit between the commercial power source 8 and the load 9 is interrupted, as shown in FIG. 4(C), only power is supplied to the load 9 from the preliminary power supply unit 4 at a voltage of 100%. To compensate for the instantaneous drop/stop Electricity.

Next, the operation of each part of the control unit 12 at the time of compensation will be described. The control unit 12 performs the same control as when the accident occurred. In other words, in the control unit 12, the voltage determining unit 31 detects the signal output from the measuring transformer 1 1 every 1/4 cycle in accordance with the above-described manner. The voltage determination unit 31 detects the instantaneous decrease or power failure while the commercial power source 8 is instantaneously reduced or power-off, and does not output signals to the changeover switches 3 5 and 3, the battery state determination unit 3 9, and the thyristor control unit 32. Therefore, the changeover switch 35 maintains the signal of the self-operation phase signal generation unit 34, and outputs it to the output voltage reference sine wave generation unit 40. The changeover switch 38 maintains the signal from the PQ control unit 37. status. Further, since the battery state determining unit 39 continues to stop charging of the battery 15, the signal is not output, and the thyristor control unit 32 does not output the illuminating point index (i g n i t i ο η ) signal. Therefore, the output voltage reference sine wave generating unit 40 generates a waveform of the sine wave voltage based on the signal (phase information) output from the self-operating phase signal generating unit 34, and outputs the signal to the converter output control unit 41 to continue only Power is supplied to the load 9 from the preliminary power supply unit 4. (D) In the case of resuming the power failure of the commercial power source 8 during the power-on, in the uninterruptible power supply device 1, the thyristor 1 of the high-speed current limiting interruption portion 3 is as described in accordance with FIG. 4(A) Both the 3a and the thyristor 1 3b are controlled in the closed state of the point, and the power is supplied from the commercial power source 8 to the load 9 via the high-speed current limiting interrupt unit 3, and the power is supplied from the preliminary power supply unit 4.

Here, in the event of an accident in the commercial power source, the necessary power can be supplied to the load from the preliminary power source means in the near future. However, the state in which the power supply device 1 supplies power to the load 9 is continuously continued. When a certain amount of time elapses, since the voltage of the DC power supply of the standby power supply means is lowered, the necessary power cannot be supplied to the load. Therefore, the system can be configured to connect the emergency generator that is the backup power source of the uninterruptible power supply unit 1 to the load. Fig. 7 is a schematic view showing an emergency power generator connected to an emergency power supply unit. As shown in FIG. 7, the uninterruptible power supply device 1 is connected to the load 9, and the power supply system switching switch 52 is provided at the input terminal 6 of the uninterruptible power supply device 1, and is configured to switch the commercial power supply 8 and the emergency generator. 5 1 connection. The power failure compensation system operates in the manner described below. First, when a power failure occurs on the system side, power is supplied to the load 9 from the preliminary power source unit 4 of the constant current power supply device 1 in the manner described above. Further, after the occurrence of an accident on the system side, the emergency power generator 51 is started up at a timing that cannot be supplied from the preliminary power supply unit 4 until sufficient power is supplied to the load 9. Then, the control unit 12 outputs a control signal to the power supply system changeover switch 52, activates the emergency generator 51, and switches the power supply system changeover switch 52 to the emergency power generator 51 side when the operation is stabilized. The control unit 12 of the uninterruptible power supply device 1 monitors the phase of the output of the emergency generator 51 by the measuring transformer 1 1 so that the output of the preliminary power supply unit 4 and the output of the emergency generator 51 are synchronized. The conversion unit 17 is controlled. The output of the control unit 12 in the preliminary power supply unit 4 and the emergency generator 5 1 33 326\patent specification (supplement)\94-07\94109738

When the output of 1313953 is synchronized, the sluice fluid 1 3a fluid 1 3 b of the high-speed current limiting interruption unit 3 is supplied from the emergency generator E to the load 9 via the high-speed current limiting interruption unit 3. At this time, the control unit 1 2 switches the operation of the cutting, and stops the supply of electric power to the load 9 from the preliminary power supply unit 4 to charge the battery 15. Further, while the emergency generator 51 is supplied with electric power to the load line, the method of charging the preliminary power supply unit 4 may be set. When the power failure of the commercial power source 8 is canceled and the power is turned off, the portion 1 2 extinguishes the thyristor 1 3 a and the thyristor 1 3 b, and switches the operation of the portion 17 to load the load from the preliminary power supply unit 4. Supply electricity. At this time, the output of the standby power supply unit 4 is controlled to be synchronized with the emergency generator 5 1 . Then, the control unit 12 outputs a control signal to the electric power switch 52 to switch the switch to the commercial power source 8 side. The control unit monitors the phase of the output of the commercial power source 8 by the measuring transformer 1 1 and converts the output unit 17 so that the output of the power source unit 4 and the output of the commercial power source 8 are synchronized. When the output of the preliminary power supply unit 4 and the commercial power supply 8 are input, the control unit 12 refers to the thyristor 1 3 a fluid 1 3 b of the high-speed current limiting interrupt unit 3, and the commercial power source via the high-speed current limiting interrupt unit 3. 8 pairs of negative power supply. At this time, the control unit 1 switches the switching unit 17 to stop the supply of electric power to the load 9 from the preliminary power supply unit 4, and starts charging the electric power to be in a state of sound. In this manner, before the voltage of the battery 15 is lowered and the sufficient power is not supplied from the pre-source portion 4 to the load 9, since the emergency device 51 is activated to supply electric power, the load 9 can be continued for 326\. Patent specification (supplement)\94-07\94109738 34 and gate>1 will change the part to start the 9-input battery control switch, in the wheel source system; 12 make the pre-control out the same and the gate load 9 of the moving pool 15 back-up power generation Stable 1313953 to supply electricity. Further, the emergency generator 51 may be provided with a timer circuit, and the high-speed current limiting interrupt unit 3 of the uninterruptible power supply device 1 interrupts the circuit between the commercial power source 8 and the load 9, and starts after a predetermined time has elapsed. In this manner, the electric power supplied to the preliminary power supply unit 4 is equal to or lower than a predetermined value, and the electric power can be supplied from the emergency power generator 51 before the required electric power can be supplied to the load 9.

Further, in the above description, the case has been described in the case where the uninterruptible power supply device 1 uses the DC power supply of the preliminary power supply unit 4 and the battery (battery), but the present invention is not limited to this mode, and other methods may be used. . For example, an electric double layer capacitor or a capacitor can also be used as the direct current power source. In addition, it is also possible to construct a flywheel type permanent magnet generator as a power supply " BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic configuration diagram of an uninterruptible power supply device according to an embodiment of the present invention. The graph of Figure 2 is used to show the relationship between the current decay time constant and the equivalent impedance for the AC power cycle. Figure 3 is a block diagram of the control unit of the uninterruptible power supply unit. 4(A) to (C) are schematic diagrams for explaining the operation of the uninterruptible power supply unit. 5(A) and (B) are equivalent circuits and vector diagrams of the uninterruptible power supply device. Figure 6 is a diagram showing the output voltage waveform and control timing of the uninterruptible power supply unit. Fig. 7 is a schematic view showing the connection of an emergency generator to an uninterruptible power supply unit. 35 326\Patent Specification (Repair)\94-07\9410973 8 1313953 Mode of Uninterruptible Power Supply Installation Figure 8 is a structural diagram of a prior art commercial power supply and load connected to a commercial unit. Main component symbol description 1 2 3 4 5 1 09 10 11 Uninterruptible power supply unit accident detection unit High-speed current-limit interruption unit Pre-source unit bypass unit input terminal output terminal Commercial power supply load Emergency generator measurement transformer 1 2 1 2 control unit 13 bridge circuit 13a, 13b thyristor 13c, 1 3d diode 13al, 13a2 AC terminal 1 3d 1 , 1 3d2 DC terminal 14 DC reactor 15 Battery 16 Battery output measurement unit conversion unit 326\Patent specification ( Supplement) \94-07\94〗 09738 36 1313953 __ m 1 7 2009 Day Cold (more) replacement page replacement page

17a Charging unit 17b Converter 18 Filter circuit 1 8C Capacitor 1 8L Reactor 19 Transformer 20 Power supply measuring unit 20a AC measuring current transformer 2 Ον AC measuring transformer 2 1 Interrupting unit 3 1 Voltage determining unit 32 Brake fluid Control unit 33 Synchronization signal generation unit 34 White line operation phase signal creation unit 35' 38 Switch 36 PQ calculation unit 37 PQ control unit 39 Battery state determination unit 40 Output voltage reference sine wave generation unit 4 1 Converter ¥ m Control unit 5 1 Emergency generator 52 Power system changeover switch P Effective power Q Invalid power 94109738 37

Claims (1)

毳 1313953 X. Patent application scope 1. An uninterruptible power supply device characterized by: an accident detecting means for detecting an accident of a commercial power source; and a high-speed current limiting interruption means for using a power source to load when the commercial power source is sound Supplying electric power, the circuit for interrupting power from the commercial power source when the accident detecting means detects an accident of the commercial power source; and the preparatory power source means detecting the commercial power source by the accident detecting means when the commercial power source is sound The effective power and the ineffective power supplied by the load until the accident are zero system, wherein the responsiveness is in the above-mentioned accident detecting means, and the accident confirmation period of the commercial power source is longer than the PQ control, and thus the detecting means detects In the case of the above-mentioned commercial power supply accident, the control is stopped, and the designated power is immediately given in the manner of no instantaneous power failure after the accident occurs. When the accident detecting means detects that the accident high-speed current limiting interruption means interrupts the above circuit, it is used to The above necessary power. 2. An uninterruptible power supply device, characterized by comprising: an accident detecting means for detecting a commercial power source to reduce accidents and power failures at a specified cycle; and a high speed current limiting interruption means having a circuit for including the commercial power from the above The single-phase rectifier bridge of the high-speed switch that opens and closes is connected to the two DC terminal reactors of the single-phase rectifier bridge circuit, and when the commercial power source is sound, the commercial power APR 1 7 2009 replaces the above-mentioned commercial measurement. In the above-described load supply, the above PQ control is set to the above-mentioned PQ to supply the load, and the load is supplied to the instantaneous voltage power supply circuit, and the DC power supply is repaired via the upper 94109738 38 1313953 E! Replacement 丨98ΓΪ: 1^" The DC reactor supplies power, and when the accident detecting means detects the accident of the commercial power source, the high-speed switch interrupts the circuit for supplying power from the commercial power source; and the preparatory power source means A filter circuit including an AC reactor, a converter, and a DC link are connected in series In the structure of the source, when the commercial power source is sound and before the accident detecting means detects the accident of the commercial power source, the PQ control is performed, and the effective power and the reactive power supplied to the load are both zero, and the accident detection is performed. When detecting the accident of the commercial power source, the PQ control is stopped and the necessary power is supplied to the load; and the responsiveness of the PQ control is set to be longer than the accident confirmation period of the commercial power source of the accident detecting means. 3. The uninterruptible power supply device of claim 2, wherein the allowable voltage reduction rate for the load is set to A ° /., and the impedance of the alternating current reactor is set to Z, the DC reactor The impedance is set at (1 0 0 Z ) / A the above. 4. The galvanic power supply device according to claim 2 or 3, wherein the control means is provided for controlling the voltage of the standby power source means and the voltage of the commercial power source to be substantially in phase and of the same amplitude. 5. The uninterruptible power supply device of claim 2, wherein the high speed open relationship is a pair of thyristors, and the single phase rectification bridge circuit connects at least one of the two AC terminals to the pair of The thyristor, the two AC terminals of the rectifier circuit are connected to the commercial power source and the load. 94109738 39 1313953 More) Positive replacement page 6. A power failure compensation system characterized by: An uninterruptible power supply device comprising: an accident detecting means for detecting an accident of a commercial power source; and a high-speed current limiting interruption means for supplying power from the commercial power source to the load when the commercial power source is sound, when the accident detecting means detects In the event of an accident of the commercial power source, a circuit for interrupting the supply of power from the commercial power source to the load; and the standby power source means before the commercial power source is sound and before the accident detecting means detects the accident of the commercial power source The PQ control is performed such that both the effective power and the reactive power supplied to the load become zero, wherein the responsiveness is based on the accident detecting means, and the PQ control is set to be longer than the accident confirmation period of the commercial power source, and When the accident detecting means detects the accident of the commercial power source, the PQ control is stopped, and after the accident occurs, the designated power is immediately supplied to the load without a momentary power failure, and when the accident detecting means detects an accident, When the above high-speed current limiting interrupt means interrupts the above circuit, it is used to The load supplies the necessary power; The emergency generator is activated when the high-speed current limiting interruption means interrupts the circuit and passes the specified time; and the switch is used to switch the connection between the load and the commercial power source and the emergency generator. 7. A power failure compensation system, characterized by comprising: an uninterruptible power supply device, having: an accident detection means for detecting a transient voltage reduction accident and a power failure accident of a commercial power supply at a specified cycle; and a high speed current limiting interruption means having A single 94109738 40 1313953 93⁄4. I 1 ¥ (more) replacement page that includes a high-speed switch that opens and closes a circuit that supplies power from the commercial power source. a phase rectifying bridge circuit and a DC reactor connected between the two DC terminals of the single-phase rectifier bridge circuit, and when the commercial power source is sound, supplying power from the commercial power source via the DC reactor, when the accident detecting means When detecting the accident of the commercial power source, the high-speed switch interrupts a circuit for supplying electric power from the commercial power source; and the preparatory power source means is connected in series with a filter circuit including an AC reactor, a converter, and a DC power supply. When the commercial power source is sound and before the accident detecting means detects the accident of the commercial power source, the PQ control is performed to make the effective power and the reactive power supplied to the load zero, and the accident detecting means detects the commercial In the event of a power failure, the PQ control is stopped and the necessary power is supplied to the load; and the responsiveness of the PQ control is set to be longer than the accident confirmation period of the commercial power source of the accident detecting means; the emergency generator, In the above high speed current limiting interrupt means interrupt circuit With time over a specified time, for starting; and And a switch for switching the connection between the load and the commercial power source and the emergency generator. 94109738 41 1313953 APR 1 7 2009 Replacement page 2/7 Γ—------ Year and month dip (more) positive replacement page