JP4725010B2 - Two-system mutual backup power supply - Google Patents

Description

The present invention comprises a Basutaikon data Kuta provided two generators for outputting the AC power connected by a bus to the respective load between that bus, the load of both the one of the generator and the other generator during abnormal relates two systems mutually backed power supply for supplying power to, and in particular to a preferred dual cross-backed power supply aircraft applications.

In general, an aircraft power supply device that is mounted on an aircraft in flight and supplies power (output) to an in-flight load is connected to engines (drive sources) on both the left and right sides of the aircraft via CSD1 and CSD2 (speed governor). A generator is connected, and power is supplied from each of the two generators to each load connected by bus to each generator.
FIG. 8 is a block diagram showing a schematic configuration of a conventional aircraft power supply device A. As shown in FIG.
A conventional aircraft power supply device A includes two generators G1 and G2 that output AC power to loads L1 and L2 connected by predetermined power buses B1 and B2, and the two generators G1 and G1, respectively. It has and a Basutaikon data Kuta 90 (BTC) for connecting the bus B1, B2 of G2.
The two generators G1 and G2 are connected to the engines (drive sources) on both the left and right sides of the aircraft via CSD (speed governor) (not shown), and both generators G1 and G2 are operated by the CSD. Is driven while maintaining a constant rotational speed (for example, 400 Hz). As a result, the output frequency is kept constant.
The output voltage of the generators G1 and G2 is maintained at a constant voltage (for example, 115V) by a voltage control device (not shown) provided in the generators G1 and G2.
With the configuration shown in FIG. 8, when both the generators G1 and G2 are operating normally, power is supplied to the loads L1 and L2 independently from the generators G1 and G2, respectively. . Then, the case where the generator G1, G2 either the abnormality (failure or the like) occurs, output a predetermined operation signal to the Basutaikon data Kuta 90 from an external control device or the like, the Basutaikon data Kuta 90 actuation Thus, the buses B1 and B2 are electrically connected, and power is supplied to both loads L1 and L2 from the normal side of the generators G1 and G2. That is, the two generators G1 and G2 have a dual-type backup function that backs up each other while independently operating. As a result, power can be continuously supplied to the load on the side where the abnormality has occurred.
Such a power supply device is disclosed in Non-Patent Document 1, for example.
On the other hand, conventionally, there are two connection ends, and AC power having the same phase, frequency and voltage as the AC power output to one of the connection ends is output to the other connection end, and the AC in the opposite direction. Bi-directional converter capable of power conversion, that is, bi-directional power conversion with output of AC power having the same phase, frequency and voltage as AC power output to the other connection end to the one connection end Exists.
Aerospace Engineering Handbook (Second Edition), Japan Aerospace Society, P609, Figure B4.51

However, if the Basutaikon the data Kuta 90 actuates a generator for supplying power is switched, at the time of switching, so-called instantaneous power failure state where electric power supply to the load of the abnormality generation side stops momentarily occurs. When this momentary power failure occurs, the operation cannot be continued depending on the electronic equipment connected as a load, and the phase, frequency and voltage of the power supply change suddenly when the power supply is switched (when BTC is ON). In such cases, problems such as an excessive current instantaneously flowing and adversely affecting the entire load have occurred.
Accordingly, the present invention has been made in view of the above circumstances, and the object of the present invention is to generate one power generation when two generators that are connected to a load by a bus and output AC power back up each other. It is an object of the present invention to provide a two-system mutual backup type power supply device that can back up the power supply to a load by the other generator without causing a sudden change such as an instantaneous power failure or a power supply phase when the machine is abnormal.

In order to achieve the above object, the present invention includes two generators that are driven by two drive sources and output AC power independently to each load connected to the bus during normal operation, A bus tie contactor for connecting two generator buses, a bidirectional converter connected in parallel with the bus tie contactor between the two generator buses, and performing bidirectional AC power conversion between the buses; , Comprising a phase synchronization circuit and a low-pass filter that cause a response delay in the phase, frequency and voltage of each of the electric power input from the two generators, and when an abnormality occurs in one of the generators, the phase and frequency and voltage of the output power to the bus side of the generated the generator, by the phase locked loop circuit and a response delay of the low-pass filter, the generator is normal From the phase and frequency and voltage of output power at a later point in time, gradually shifts with a predetermined time constant to the phase and frequency and voltage of the electric power obtained by converting AC power of the generator of the normal side by the bi-directional converter And a first control means for operating the bus tie contactor to cause power supply through the bidirectional converter and power supply through the bus tie contactor in parallel. It is configured as a system mutual backup power supply.
As a result, when an abnormality occurs in one of the two generators, the power supply from the normal generator to the abnormal load is continued without causing an instantaneous power failure by the action of the bidirectional converter. (Back up).
Furthermore, the bidirectional converter can gradually shift the phase of the output to the abnormality occurrence side from the power supply phase immediately before the occurrence of the failure to the normal power supply phase etc. on the generator side with a predetermined time constant. It is also possible to prevent a transient excessive current from being generated in a load such as a motor due to a sudden change in the power supply phase.
In addition, since the bus tie contactor is also provided in parallel with the bidirectional converter, the time required to supply power through the bidirectional converter can be switched between power sources such as activation of the bus tie contactor (of the generator). Only a very short time is sufficient for switching. For this reason, the temperature rise of the bidirectional converter is relatively small, and it is not necessary to provide a large (heavy) cooling means for the bidirectional converter. Therefore, an increase in weight due to the combined use of the bidirectional converter and the bus tie contactor can be suppressed sufficiently small.

In addition, the two-system mutual backup power source is configured to supply power through the bidirectional converter and power supply through the bus tie contactor to one abnormal generator-side bus by the first control means. May be provided with a second control means for stopping the power supply through the bidirectional converter after being temporarily performed in parallel.
Further, the two-system mutual backup type power supply device is suitable for application to a power supply device that is mounted on an aircraft and outputs AC power to an onboard load because it can prevent an instantaneous power failure and suppress an increase in weight.

According to the present invention, when an abnormality occurs in one of the previous SL two generators, by the action of the bi-directional converter, without causing the momentary power failure, the power to the load of the abnormality generation side from the normal generator Supply can be continued (backed up).
In addition, the bidirectional converter can gradually shift the phase of the output to the abnormality occurrence side from the power supply phase immediately before the failure occurrence to the normal power supply phase on the generator side with a predetermined time constant. It is also possible to prevent a transient excessive current from being generated in a load such as a motor due to a sudden change in the power supply phase.
In addition, the temperature rise of the bidirectional converter at the time of switching the generator is relatively small, and it is not necessary to provide a large (heavy) cooling means for the bidirectional converter. It can be suppressed.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
1 is a block diagram showing a schematic overall configuration of the power supply device X according to the embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a bidirectional converter and its control unit provided in the power supply device X, and FIG. FIG. 4 is a control block diagram of the bidirectional converter when one generator G1 in the power supply device X is abnormal, and FIG. 5 is a control block diagram of the bidirectional converter when the two generators in the device X are normal. FIG. 6 is a block diagram showing the configuration of the PLL circuit when one generator G2 in the power supply device X is abnormal, FIG. 6 is a block diagram showing the configuration of the PLL circuit, and FIG. 7 shows that one generator G1 in the power supply device X is abnormal. FIG. 8 is a block diagram showing a schematic configuration of a conventional power supply device A. FIG.

First, with reference to the block diagram shown in FIG. 1, the overall configuration of a power supply device X that is a two-system mutual backup power supply device according to an embodiment of the present invention will be described.
The power supply device X is an aircraft power supply device that is mounted on an aircraft in flight and supplies (outputs) power to a load in the aircraft.
The power supply device X is connected to the engines E1, E2 (an example of the drive source) on both the left and right sides of the aircraft via CSDs (speed governors) (CSD1, CSD2), and is driven to rotate by the engines E1, E2. Thus, the two generators G1 and G2 that output AC power to the loads L1 and L2 connected by the predetermined buses B1 and B2, and the buses between the two generators G1 and G2 (B1- and Basutaikon data Kuta 90 for connecting B2 between), which is connected two generators G1, in parallel with the Basutaikon data Kuta 90 between bus G2, bidirectional performing bidirectional AC power converter between the bus A converter 10 (CNV) and a control unit 20 that controls the bidirectional converter 10 are provided.
When an abnormality occurs in one of the two generators G1, G2, the control unit 20 outputs the output power to the bus side of the generator in which the abnormality has occurred, and the AC power of the generator on the normal side. wherein after is shifted with a predetermined time constant to the power converted by the bi-directional converter, operating said Basutaikon data Kuta 90 from the abnormality generation of the generator after a predetermined time.
The two generators G1, G2 are rotationally driven while being maintained at a constant rotational speed (for example, 400 Hz) by the action of the CSD. As a result, the output frequency is kept constant.
The output voltage of the generators G1 and G2 is maintained at a constant voltage (for example, 115V) by a voltage control device (not shown) provided in the generators G1 and G2.
When both the generators G1 and G2 are operating normally, power is supplied to the loads L1 and L2 independently from the generators G1 and G2, respectively. Then, the case where the generator G1, G2 of abnormality in one (failure or the like) occurs, output a predetermined operation signal to the Basutaikon data Kuta 90 from an external control device or the like (not shown), the Basutaikon data By operating the Kuta 90, the buses B1 and B2 are electrically connected, and power is supplied to both the loads L1 and L2 from the normal side of the generators G1 and G2.
The above operation is the same as that of the above-described conventional power supply device A (see FIG. 8). However, in this power supply device X , after the abnormality (failure or the like) is detected in one of the generators G1, G2, the external power supply A is detected. between to said actuation signal is output from the control device or the like to the Basutaikon data Kuta 90, from normal towards the generator G1, G2 by the power converter action of the bi-directional converter 10, the abnormality generation side Power is also supplied to the load. At that time, due to the action of the bidirectional converter 10, the phase of the output power to the abnormality occurrence side gradually shifts from the power supply phase etc. immediately before the occurrence of the failure to the normal power supply phase etc. of the generator side with a predetermined time constant. Is done.
As a result, it is possible to continue (back up) the power supply from the normal generator to the load on the fault occurrence side without causing an instantaneous power failure at the load on the fault occurrence side. It is also possible to prevent a transient excessive current from being generated in a load such as a motor.

FIG. 2 is a diagram illustrating a schematic configuration of the general bidirectional converter 10 and the control unit 20 included in the power supply device X.
The bidirectional converter 10 includes two converters 11 and 12 on the respective sides of the generators G1 and G2, and a DC link unit 13 (Bdc) which is a DC voltage circuit provided between the two converters 11 and 12. It is equipped with.
The converters 11 and 12 each convert AC power into DC power or DC power into AC power.
The control unit 20 adjusts the output level of the gate signal SG1 output to one of the converters 11 so that the AC power from one of the buses B1 (that is, from the generator G1) is supplied to the DC link unit 13. Or the output of the DC link unit 13 can be powered to the bus B1.
Similarly, the control unit 20 adjusts the output level of the gate signal SG2 to be output to the other converter 12, thereby generating AC power from the other bus B2 (that is, from the generator G2). It is possible to regenerate to the DC link unit 13 or power the output of the DC link unit 13 to the bus B2.

(When both generators G1, G2 are normal)
FIG. 3 is a control block diagram of the bidirectional converter 10 by the control unit 20, and shows a signal flow when the two generators G1 and G2 are normal by a solid line. In the figure, “SL” is a select switch, “LPF” is a low-pass filter, “AVR” is an automatic voltage regulator, “ACR” is an automatic current regulator, and “PLL” is a phase. Synchronous circuit (Phase Locked Loop), “−1” represents the process of making the sign of the signal value (current command value) minus, and the parenthesized numerical values (0), (1),. Represents. Further, Imax input to each AVR represents the maximum value of the AVR output.
When the two generators G1 and G2 are normal, the gate signal SG1 to the converter 11 on the bus B1 side (that is, the generator G1 side) indicates that the current value I1f in the bus B1 is the bus B1 side. Is adjusted by the ACR (1) so as to coincide with the current command value I1r of (to eliminate the difference).
Here, the current command value I1r makes the DC voltage Vdc in the DC link unit 12 (Vdcf that is output through the insulation amplifier (FIG. 2)) coincide with the predetermined DC bus voltage command value Vdcr. This is a signal value obtained by subtracting the sign of the output value of AVR (0) adjusted so that the difference becomes 0. The reason why the output value of the AVR (0) is minus is because the power is in the regeneration direction. Also, Vdcf is controlled to be equal to Vdcr, and as a result, Vdc is equal to Vdcr.

On the other hand, the gate signal SG2 to the converter 12 on the bus B2 side (that is, the generator G2 side) is similar to the gate signal SG1, and the current value I2f in the bus B2 is the current command on the bus B2 side. Adjusted by ACR (2) to match the value I2r (no difference). Here, the current command value I2r is also a signal value obtained by minus the sign of the output value of the AVR (0), like the current command value I1r.
As described above, in the DC link unit 12, Vdc becomes equal to Vdcr due to the power regenerated from the bus B1 side and the power regenerated from the bus B2 side. As a result, which side of the buses B1 and B2 Also, no power is supplied to the other.

FIG. 6 is a block showing the circuit configuration of the PLLs (1) and (2).
The PLLs (1) and (2) convert the input analog voltage signal VS (corresponding to the V1f or V2f) into a rectangular wave signal PS by the waveform shaper 31, and a voltage proportional to the frequency of the rectangular wave signal PS. VF is output by the frequency detector 32.
In parallel with this, the phase difference between the most significant bit PF of the output signal θ of the PLL (1) and (2) and the rectangular wave signal PS is detected by the phase comparator 33 and output as the phase difference voltage VE. .
Then, the transmitter 34 outputs a rectangular wave signal F0 having a frequency proportional to the added voltage Vi of the voltage VF and the phase difference voltage VE, and a signal obtained by counting the pulses of the rectangular wave signal F0 by the counter 35 is a synchronization signal. Output as θ (corresponding to the synchronization signal θ1 or θ2).
Here, according to the setting of the loop gain of the phase comparator 33, the synchronization signal θ responds with a predetermined time constant. Therefore, even when the phase and frequency of the input signals of the PLL (1) and (2) change instantaneously, the phase and frequency of the output signal θ (θ1 or θ2) gradually change with a predetermined time constant.
The reason why the frequency detector 32 is provided and the voltage VF is added is to speed up the response, so that a configuration in which the frequency detector 32 is omitted is also conceivable.

(Control of gate signal when generator G1 is abnormal)
FIG. 4 is a control block diagram of the bidirectional converter 10 by the control unit 20, and shows a signal flow when only one of the generators G1 is abnormal in a solid line.
Even if the generator G1 becomes abnormal, the gate signal SG2 to the converter 12 is subjected to the same control (same output) as that when the two generators G1 and G2 are normal. Regeneration of power from B2 to the DC link unit 13 is performed.
On the other hand, when the generator G1 becomes abnormal, the voltage V1f in the bus B1 decreases. Therefore, the control unit 20 detects the voltage decrease of the voltage V1f at an early stage. (Before disappearance), the output of SL (1) is switched from the voltage V1f of the bus B1 to the voltage V2f of the bus B2 (in FIG. 4, the switching signal is represented by SA1).
The output of SL (1) (here, V2f) is converted into a voltage signal V1r whose change has been smoothed by LPF (1), and the smoothed voltage signal V1r and the voltage V1f of the bus B1 A current signal proportional to the level difference is output by AVR (1).
Here, before the SL (1) is switched (when the two generators G1 and G2 are normal), the voltage V1f of the bus B1 is output to the LPF (1). Therefore, when the SL (1) is switched, that is, from the moment when the abnormality occurs in the generator G1, the voltage signal V1r is the voltage V1f of the bus B1 at the last time when the generator G1 is normal. Gradually changes so as to follow the voltage V2f of the bus B2. That is, when an abnormality occurs in the generator G1, the level of the voltage signal V1r changes from the level of the voltage V1f to the level of the voltage V2f with a predetermined time constant.
Further, the output of the AVR (1) is output as the current command value I1r via the SL (3).
The SL (3) outputs the sign inversion value of the output of the AVR (0) as the current command value I1r when the two generators G1 and G2 are normal, but when the generator G1 is abnormal, In response to the switching signal SB1 output by the control unit 20, the output of the AVR (1) is output as the current command value I1r.
Thus, the gate signal SG1 to the converter 11 on the bus B1 side (that is, the generator G1 side) causes the voltage V1f of the bus B1 to follow the voltage V2f of the bus B2 with a predetermined time constant. Is adjusted by the ACR (1) (so that there is no difference).
Further, when the generator G1 is abnormal, a synchronization signal for the phase and frequency of the voltage signal V2f of the bus B2 is input to the ACR (1) as θ1. The synchronization signal θ1 is obtained by the PLL (1) which inputs the voltage signal V2f and outputs a pulse signal whose phase and frequency are synchronized with the voltage signal V2f.
Switching between signals (V1f or V2f) input to the PLL (1) when both the generators G1 and G2 are normal and when only the generator G1 is abnormal is a switching signal output by the control unit 20 Performed based on SC1.
Thus, the phase and frequency of the gate signal SG1 are determined from the phase and frequency of the last output voltage of the generator G1 when the generator G1 is normal when the generator G1 is abnormal. The signal gradually changes with a predetermined time constant to the phase and frequency of the output voltage of the machine G2.
As a result of the above control, even if an abnormality occurs in the generator G1, the power of the bus B2 is supplied to the bus B1 by the converter 11, so an instantaneous power failure occurs in the bus B1 (the load L1). Does not occur. Therefore, it is possible to prevent some of the electronic devices from continuing to operate.
Further, the phase, frequency and voltage of the power supplied to the bus B1 are determined by the response delay of the PLL (1) and the response delay of the LPF (1) in the control unit 20 (an example of the first control means). As a result, the phase, frequency and voltage of the output power at the last time when the generator G1 was normal gradually shifts to the phase, frequency and voltage of the output power of the generator G2 with a predetermined time constant. Therefore, it is possible to prevent a transient excessive current from being generated in a load such as a motor due to a sudden change in the power supply phase or the like.

(Control of gate signal when generator G2 is abnormal)
FIG. 5 is a control block diagram of the bidirectional converter 10 by the control unit 20, and shows a signal flow when only the other generator G2 is abnormal in a solid line.
The operation when the generator G2 is abnormal is that the operations related to the outputs of the gate signals SG1 and SG2 are opposite to the operations when the generator G1 shown in FIG. 4 is abnormal. Since there is, explanation is omitted here.
The SL (1), LPF (1), AVR (1), SL (3), ACR (1), SL (5) and PLL (1) when the generator G1 is abnormal. SL (2), LPF (2), AVR (2), SL (4), ACR (2), SL (6) and PLL (2) perform the operations corresponding to each of the following operations. ).
As a result, even if an abnormality occurs in the generator G2, the power of the bus B1 is supplied to the bus B2 by the converter 12, so that no instantaneous power failure occurs in the bus B2 (the load L2).
Further, the phase, frequency and voltage of the power supplied to the bus B2 are the last time when the generator G2 is normal due to the response delay of the PLL (2) and the response delay of the LPF (2). Since the output power phase, frequency and voltage of the generator G1 gradually shifts to the output power phase, frequency and voltage of the generator G1 with a predetermined time constant, a transient to a load such as a motor due to a sudden change in the power supply phase or the like. Generation of an excessive current can be prevented.

(Change in input / output signal of control unit 20 when generator G1 is abnormal)
Next, changes in each input / output signal of the control unit 20 when a generator abnormality occurs will be described with reference to FIG.
FIG. 7 is a time chart showing changes in the input / output signals of the control unit 20 when the two generators G1 and G2 are in a normal state and one of the generators G1 becomes abnormal. In the figure, a signal indicated by (IN) is an input signal to the control unit 20, and a signal indicated by (OUT) is an output signal from the control unit 20. A bidirectional converter operation signal CNV, which is another signal, is a signal (ON: power supply operation) indicating whether or not a power supply operation (here, B2 to B1) through the bidirectional converter 20 is performed. medium), Basutaikon data Kuta operation signal BTC, the Basutaikon power supply operation through the data Kuta 90 (here, a signal indicating whether the B2 B1) has been performed (ON: represents during power supply operation), It is not an input / output signal of the control unit 20.

When an abnormality occurs in the generator G1 (at time P0), the voltage V1f of the bus B1 input to the control unit 20 starts to decrease. When the start of the voltage drop is detected by the control unit 20, the control unit 20 turns on an error notification FG1 indicating that the generator G1 is abnormal with respect to the upper (external) control device. To do.
At the same time, the control unit 20 switches the output of the gate signal SG1 from the control output shown in FIG. 3 to the control output shown in FIG. As a result, the power supply operation (B2 → B1) through the bidirectional converter 20 is instantly started (that is, the CNV is turned on), so that the converter operation is output as an output to that effect to the host controller. The signal SON is turned ON.
On the other hand, the controller of the upper which receives the ON output of the error notification FG1 is ON outputs the operation command ST of the Basutaikon data Kuta 90 to the controller 20.
The control unit 20 receives the ON signal of the operation command ST (an example of the first control means), the ON outputs an operation command SBTC to said Basutaikon data Kuta 90.
Thus, the said from the abnormality generation of the generator G1 (during ON of the FG1) after a predetermined time T1 Basutaikon data Kuta 90 is operated, the power supply operation through the Basutaikon data Kuta 90 (B2 → B1) is started (That is, the BTC is ON).

Next, the control unit 20 (an example of the second control unit) measures the time when a predetermined converter operation time T0 set in advance has elapsed after the ON output of the error notification FG1 (for example, with a timer). The output of the gate signal SG1 is switched (returned) from the control output shown in FIG. 4 to the control output shown in FIG. As a result, the power supply operation (B2 → B1) through the bidirectional converter 20 is stopped (that is, the CNV is OFF). At the same time, the control unit 20 outputs the converter operation signal SON OFF as an output indicating that the power supply by the bidirectional converter 10 is stopped to the higher-level control device.
The As can be seen from the bidirectional converter operating signal CNV changes and changes in the Basutaikon data Kuta operation signal BTC, when an abnormality in one of the generator occurs, first, power supply by the bidirectional converter 10 instantly after the backup is performed, temporarily, and backup power supply through said bi-directional converter 10, and the Basutaikon data Kuta 90 of the power supply through the backup is to be performed in parallel (in the figure, Time zone represented by W).
Thereby, the instantaneous power failure on the bus B1 side can be surely prevented.
Further, operating time T0 of the bidirectional converter 10, the Basutaikon data Kuta 90 fires sufficient very short time (e.g., about 100 msec) so requires, the temperature rise of the bi-directional converter 10 is relatively small. For this reason, there is no need to provide a large (heavy) cooling means for the bidirectional converter 10, and the increase in the weight of the power supply device X relative to the conventional power supply device is almost the weight of the bidirectional converter 10 itself (for example, , About several kilograms).

On the other hand, the higher-level control device that has received the ON output of the error notification FG1 turns on the output of the operation recognition signal XSG1 indicating that the generator G1 is operating normally to the control unit 20 Change the output from to OFF. The state where the driving recognition signal XG1 is OFF represents a state where the host control device recognizes that the generator G1 is not operating normally (abnormal).
On the other hand, the control unit 20 that detects that the driving recognition signal XG1 is OFF changes the output of the error notification FG1 from ON to OFF.
Since the example shown in FIG. 7 is an example when the generator G1 is abnormal, there is no change in the voltage V2f of the bus B2, and similarly, an operation recognition signal XSG2 and an error notification signal FG2 for the generator G2 side. Also remains ON.
Further, when an abnormality occurs in the generator G2, the signal states of V1f and V2f, XSG1 and XSG2, and FG1 and FG2 in FIG. 7 are switched.

The present invention can be used for, for example, a two-system mutual backup power supply device for an aircraft.

The block diagram showing the schematic whole structure of the power supply device X which concerns on embodiment of this invention. The schematic block diagram of the bidirectional | two-way converter with which the power supply device X is provided, and its control part. The control block diagram of a bidirectional | two-way converter when two generators in the power supply device X are normal. The control block diagram of a bidirectional | two-way converter when one generator G1 in the power supply device X is abnormal. The control block diagram of a bidirectional | two-way converter when one generator G2 in the power supply device X is abnormal. FIG. 3 is a block diagram illustrating a configuration of a PLL circuit. The time chart of various signals when one generator G1 in the power supply device X becomes abnormal. The block diagram showing schematic structure of the conventional power supply device A. FIG.

Explanation of symbols

E1, E2 ... Engines B1, B2 ... Buses L1, L2 ... Loads G1, G2 ... Generator SL ... Select switch LPF ... Low-pass filter AVR ... Auto Voltage Regulator
ACR ... Auto Current Regulator
PLL ... Phase-locked loop
10 ... Bidirectional converters 11 and 12 ... Converter 13 ... DC link part (Bdc)
20 ... control unit 90 ... Basutaikon data Kuta

Claims (3)

Two generators that are driven by two drive sources and that output AC power independently during normal operation for each bus connected load;
A bus tie contactor connecting the buses of the two generators;
A bidirectional converter connected in parallel with the bus tie contactor between the buses of the two generators and performing bidirectional AC power conversion between the buses;
A phase synchronization circuit and a low-pass filter that cause a response delay in the phase, frequency, and voltage of each of the electric power input from the two generators, and an abnormality occurs when an abnormality occurs in one of the generators The phase, frequency and voltage of the output power to the generator's bus side are determined by the response delay of the phase synchronization circuit and the low-pass filter , and the phase and frequency of the output power at the last time when the generator was normal. After gradually shifting the AC power of the generator on the normal side from the frequency and voltage to the phase, frequency and voltage of the power converted by the bidirectional converter with a predetermined time constant, the bus tie contactor is operated. First control means for paralleling power supply through the bidirectional converter and power supply through the bus tie contactor;
A two-system mutual backup power supply device characterized by comprising:   After the power supply through the bidirectional converter and the power supply through the bus tie contactor are temporarily performed in parallel to the one abnormal generator side bus by the first control means, 2. The two-system mutual backup power supply device according to claim 1, further comprising second control means for stopping power supply through the bidirectional converter.   3. The two-system mutual backup power supply device according to claim 1, wherein the two-system mutual backup power supply device is mounted on an aircraft and outputs alternating current power to a load in the aircraft.

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