CN109254608A - Auto compensating type AC voltage-stabilizing control method - Google Patents

Auto compensating type AC voltage-stabilizing control method Download PDF

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Publication number
CN109254608A
CN109254608A CN201811355974.6A CN201811355974A CN109254608A CN 109254608 A CN109254608 A CN 109254608A CN 201811355974 A CN201811355974 A CN 201811355974A CN 109254608 A CN109254608 A CN 109254608A
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China
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voltage
signal
control signal
control
thyristor
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CN201811355974.6A
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CN109254608B (en
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周维龙
凌云
文定都
刘建华
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Nanjing Disi Intelligent Technology Co.,Ltd.
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Hunan University of Technology
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only

Abstract

A kind of auto compensating type AC voltage-stabilizing control method, AC supply voltage is divided into multiple voltage class sections, by one or more voltage superposition in thyristor switch group selection auto-transformer output voltage, the magnet exciting coil voltage as compensator transformer carries out voltage compensation.Whether the Trig control signal of control thyristor switch group is correctly differentiated, when correct, opens the working power of trigger unit；When mistake, the working power of trigger unit is cut off, and controls the input side supply voltage of disconnection auto-transformer to protect to thyristor switch group.The pressure stabilizing control method is while realizing mutual lock control; also thyristor switch is protected to whether control circuit logic error occurs; the protection for course of work exception is effectively strengthened, keeps the course of work of AC voltage-stabilizing more stable, reliable.

Description

Auto compensating type AC voltage-stabilizing control method
Technical field
The present invention relates to power technique fields, especially a kind of auto compensating type AC voltage-stabilizing control method.
Background technique
Existing auto compensating type AC voltage regulator, its advantage is that voltage stabilized range is wide, waveform is almost without distortion, complete machine effect Rate is high, and workload-adaptability is strong.Its principle is the height situation according to input voltage, automatically controls armature winding on compensator transformer Different winding coils switching, using the no-load voltage ratio relationship of primary side Working winding and secondary windings, or by adjusting primary The alive mode of institute, provides the voltage compensation of two-way multi gear, to realize the purpose of voltage-regulation voltage-stabilization on winding.
The shortcoming of existing compensation type ac voltage stabilizer is: being changed using the movement of motor control carbon brush to compensation transformation When device magnet exciting coil applies different voltages, carbon brush is prone to wear, and is often broken down.Using electronic switch switching by the way of come into On the switching of the different winding coils of armature winding on row compensator transformer, or adjustment armature winding when institute's making alive, electronics Being delayed to turn off for switch be easy to cause power supply short circuit failure；Using the program mode (PM) control electronic switch switching of single-chip microcontroller, PLC etc. When, the problems such as program runs fast, crashes, will also result in voltage-stablizer failure, or cause power supply short circuit because of control logic mistake therefore Barrier.
Summary of the invention
In order to solve the problems of existing auto compensating type AC voltage regulator, the present invention provides a kind of Autocompensations Formula AC voltage-stabilizing control method, comprising:
The voltage of AC supply voltage waving interval range is divided into multiple voltage class sections to compensate control；By 0 in thyristor switch group in the multiple output voltages of on-off assembled state control selections auto-transformer of thyristor, or It is that 1 or multiple voltage superpositions are realized corresponding with voltage class section as the magnet exciting coil voltage of compensator transformer Voltage compensation state；The corresponding voltage compensation state in each voltage class section of AC supply voltage；Thyristor switch The on-off assembled state of thyristor issues trigger pulse control by trigger unit by Trig control signal in group.Triggering is controlled Whether signal is correctly differentiated；When Trig control signal is correct, the working power of trigger unit, trigger unit foundation are opened The Trig control signal of input issues corresponding thyristor triggering impulse；When Trig control signal mistake, trigger unit is cut off Working power, trigger unit stop issue thyristor triggering impulse.
AC supply voltage is sampled to obtain voltage class encoded radio, multiple effective volumes in voltage class encoded radio Code value and multiple voltage class sections correspond；The voltage class section of AC supply voltage changes, and voltage class is caused to be compiled When code value changes, change the on-off assembled state of thyristor in thyristor switch group accordingly to change the compensation work of compensator transformer Make state, the corresponding compensation work state in each voltage class section.Change the on-off group of thyristor in thyristor switch group When conjunction state, between its successive 2 kinds of on-off assembled state, not trigger region time is maintained, in cutoff thyristor switching group All thyristors.
The trigger region time is not realized by not trigger region control signal for the maintenance one；Trigger region control signal does not exist for control Voltage class encoded radio exports a pulse after changing；Trigger region control signal is not effective during exporting pulse, It is invalid during non-output pulse；When trigger region control signal is not effective, not trigger region time is maintained.Further, The spaced time of pulse is chosen in 10ms between 30ms in the not trigger region control signal.
The Trig control signal for controlling thyristor switch group is generated by the voltage class encoded radio control postponed；The electricity of delay The pressure grade coding value signal change moment is later than after voltage class encoded radio changes pulse in not trigger region control signal The forward position moment, and after changing earlier than voltage class encoded radio not in trigger region control signal pulse it is rear along the moment.
In the Trig control signal for controlling thyristor switch group, the effective Trig control signal of M+2 group is shared, wherein M+1 group It is controlled for realizing the compensation in M+1 voltage class section of AC supply voltage, 1 group for the institute in cutoff thyristor switching group There is thyristor；The M is more than or equal to 1.
Effective Trig control signal for all thyristors in cutoff thyristor switching group is controlled in not trigger region to be believed Number effectively when export；M+1 and the M+1 one-to-one efficient coding in voltage class section are shared in voltage class encoded radio Value；For realizing the effective Trig control signal of M+1 group of M+1 voltage class section compensation control of AC supply voltage, not Trigger region is controlled when invalidating signal and voltage class encoded radio are 1 in M+1 efficient coding value and is exported.
Voltage class encoded radio is obtained to be realized by sampling comparing unit and coding unit；Comparing unit is sampled to AC power source Voltage carries out voltage sample, M binary voltage class fiducial values of output to coding unit, coding unit output voltage grade Encoded radio.Postponed and generate not trigger region control signal to be realized to voltage class encoded radio by delay protection unit；Delay Protection location input voltage grade encoded radio, exports the voltage class encoded radio after postponing and trigger region does not control signal.Triggering Control signal is realized by interlocking control unit；Voltage class encoded radio and not trigger region control after interlocking control unit input delay Signal processed, output control thyristor switch group Trig control signal；When trigger region does not control invalidating signal and voltage class encodes When value is invalid code value, interlocking control unit exports 1 group of specifically invalid Trig control signal.
By delay detection module and not, trigger region control signal generator module forms delay protection unit；Delay detection module In include K identical delay detection circuits, each delay detection circuit input signal is postponed after it is defeated Signal out, while Edge check is carried out to input signal, export Edge check signal；K delay detection circuit is respectively to K electricity It presses grade encoded radio to carry out signal delay, the position the K voltage class encoded radio after being postponed, and K voltage class is encoded Value carries out Edge check, obtains K Edge check signal；Trigger region control signal generator module does not examine K edge of input It surveys signal and is converted to not trigger region control signal output.
In K identical delay detection circuits, each delay detection circuit includes resistance RY3, capacitor CY3, phase inverter FY5, phase inverter FY6, NAND gate FY7 or door FY8, NAND gate FY9；Phase inverter FY5 input terminal is connected to input signal end；Electricity One end of resistance RY3 is connected to phase inverter FY5 output end, and other end is respectively connected to one end of capacitor CY3, NAND gate FY7 The input terminal of an input terminal of one input terminal or door FY8, phase inverter FY6；The other end of capacitor CY3 is connected to ground terminal, Another input terminal of NAND gate FY7 is connected to input signal end or another input terminal of door FY8 is connected to input Signal end；2 input terminals of NAND gate FY9 are respectively connected to NAND gate FY7 output end or door FY8 output end；Phase inverter FY6 Output end is the output signal end after delay；NAND gate FY9 output end is Edge check signal output end.
Either, in K identical delay detection circuits, each delay detection circuit includes resistance RY0, resistance RY1, electricity Hinder RY2, capacitor CY0, capacitor CY1, capacitor CY2, diode DY1, diode DY2, driving gate FY0, phase inverter FY1, phase inverter FY2, phase inverter FY3, NAND gate FY4；Resistance RY0 is connected between input signal end and driving gate FY0 input terminal, capacitor CY0 It is connected between driving gate FY0 input terminal and ground terminal, driving gate FY0 output end is the output signal end after delay；Capacitor CY1 It being connected between input signal end and phase inverter FY1 input terminal, resistance RY1 is connected between phase inverter FY1 input terminal and ground terminal, Diode DY1 cathode is connected to phase inverter FY1 input terminal, anode is connected to ground terminal；Phase inverter FY2 input is connected to input signal End；Capacitor CY2 is connected between phase inverter FY2 output end and phase inverter FY3 input terminal, and it is defeated that resistance RY2 is connected to phase inverter FY3 Enter between end and ground terminal, diode DY2 cathode is connected to phase inverter FY3 input terminal, anode is connected to ground terminal；The 2 of NAND gate FY4 A input terminal is respectively connected to phase inverter FY1 output end, phase inverter FY3 output end；The output end of NAND gate FY4 is Edge check Signal output end.
Or be, in K identical delay detection circuits, each delay detection circuit include resistance RY1, resistance RY2, Capacitor CY1, capacitor CY2, diode DY1, diode DY2, phase inverter FY1, phase inverter FY2, phase inverter FY3, phase inverter FY11, phase inverter FY12, phase inverter FY13, phase inverter FY14, NAND gate FY4；Phase inverter FY11 input terminal is connected to input letter Number end, phase inverter FY12 input terminal is connected to phase inverter FY11 output end, and phase inverter FY13 input terminal is connected to phase inverter FY12 Output end, phase inverter FY14 input terminal are connected to phase inverter FY13 output end, and phase inverter FY14 output end is the output after delay Signal end；Capacitor CY1 is connected between input signal end and phase inverter FY1 input terminal, and it is defeated that resistance RY1 is connected to phase inverter FY1 Enter between end and ground terminal, diode DY1 cathode is connected to phase inverter FY1 input terminal, anode is connected to ground terminal；Phase inverter FY2 is defeated Enter to be connected to input signal end；Capacitor CY2 is connected between phase inverter FY2 output end and phase inverter FY3 input terminal, resistance RY2 It is connected between phase inverter FY3 input terminal and ground terminal, diode DY2 cathode is connected to phase inverter FY3 input terminal, anode is connected to Ground terminal；2 input terminals of NAND gate FY4 are respectively connected to phase inverter FY1 output end, phase inverter FY3 output end；NAND gate FY4 Output end is Edge check signal output end.
Trigger region control signal generator module is not with K input signal end or door FY10；Or K of door FY10 are defeated Enter the Edge check signal output end that signal end is respectively connected in K delay detection circuit；Or the output end output of door FY10 Trigger region does not control signal.
When Trig control signal mistake, control thyristor switch group is in guard mode, and specific method is that control disconnects The input side supply voltage of auto-transformer protects thyristor switch group；Thyristor switch group is in guard mode Under, when Trig control signal reverts to correct signal, it is automatically stopped the guard mode of thyristor switch group.
Auto compensating type main circuit, sampling comparing unit, coding unit, delay protection unit, interlocking control unit, triggering Unit, error detection control unit form auto compensating type AC voltage regulator, for realizing auto compensating type AC voltage-stabilizing control Method.Auto compensating type main circuit includes compensator transformer, auto-transformer, thyristor switch group.
Thyristor in thyristor switch group is that bidirectional thyristor or 2 unidirectional thyristor reverse parallel connections are formed Thyristor alternating-current switch.
The beneficial effects of the present invention are: control thyristor switch group, which changes compensator transformer excitation voltage, carries out voltage compensation When, ipsilateral thyristor does not simultaneously turn in guaranteeing thyristor switch group, while realizing thyristor mutual lock control, also to can Can occur coding unit there is logic error and output invalid code value, and interlocking control unit occur logic error and The case where outputing invalid Trig control signal stops issuing trigger pulse and simultaneously switches off the primary side confession of auto-transformer Electricity effectively strengthens the protection that the auto compensating type AC voltage regulator is directed to course of work exception；It is opened in thyristor When pass group is in guard mode, if Trig control signal is effective, system reenters normal logic control state, then can It is automatically stopped the guard mode of thyristor switch group and it is made to be in compensation work state again；Not using single-chip microcontroller, PLC etc. Program mode (PM) controls the switching switching of thyristor, avoids pressure stabilizing procedure fault caused by the problems such as program runs fast, crashes.On Stating function keeps AC voltage-stabilizing process more stable, reliable.
Detailed description of the invention
Fig. 1 is the system composition block diagram of auto compensating type AC voltage regulator；
Fig. 2 is auto compensating type main circuit embodiment 1；
Fig. 3 is auto compensating type main circuit embodiment 2；
Fig. 4 is sampling comparing unit embodiment 1；
Fig. 5 is sampling comparing unit embodiment 2；
Fig. 6 is coding unit embodiment, wherein Fig. 6 (a) is coding unit embodiment 1, and Fig. 6 (b) is coding unit implementation Example 2；
Fig. 7 is delay protection unit embodiment block diagram；
Fig. 8 is the delay detection circuit embodiment 1 for encoding value signal Y10 in delay detection module for voltage class；
Fig. 9 is the delay detection circuit embodiment 2 for encoding value signal Y10 in delay detection module for voltage class；
Figure 10 is the delay detection circuit embodiment 3 for encoding value signal Y10 in delay detection module for voltage class；
Figure 11 is that trigger region does not control signal generator module embodiment；
Figure 12 is that split-phase closes waveform diagram in the middle part of delay protection unit；
Figure 13 is the embodiment for interlocking control unit, wherein Figure 13 (a) is interlocking control unit embodiment 1, Figure 13 (b) To interlock control unit embodiment 2；
Figure 14 is the trigger circuit embodiment that bidirectional thyristor SR1 is triggered in trigger unit；
Figure 15 is error detection control unit embodiment.
Specific embodiment
Below in conjunction with attached drawing, the invention will be further described.
Fig. 1 be auto compensating type AC voltage regulator the system composition block diagram, sampling comparing unit to AC supply voltage into Row voltage sample, output voltage grade fiducial value P1 to coding unit, coding unit output voltage grade encoded radio P2；Delay is protected Unit input voltage grade encoded radio P2 is protected, the voltage class encoded radio P3 after postponing is exported and trigger region does not control signal P4； Interlock control unit input delay after voltage class encoded radio P3 and not trigger region control signal P4, output Trig control signal P5；Trigger unit issues trigger signal P6 to auto compensating type main circuit, controls brilliant lock according to the Trig control signal P5 of input The on-off of thyristor in pipe switching group；Error detection control unit judges whether the Trig control signal P5 of input is effective triggering control Signal, and protection control signal is issued to auto compensating type main circuit according to judging result, thyristor switch group is protected.
Fig. 2 is auto compensating type main circuit embodiment 1, including compensator transformer TB1 and auto-transformer TB2, and 6 two-way Thyristor SR1-SR6 collectively constitutes thyristor switch group, and fuse FU1 and relay normally open switch KA-1, relay is normally closed opens It closes KA-2 and forms relay protection circuit.
In Fig. 2, the bucking coil of compensator transformer TB1 is connected in phase line, and phase line input terminal is L1, output end L2. Voltage on TB1 magnet exciting coil is controlled by thyristor switch group.Auto-transformer TB2 has 3 output tap C1, C2, C3, two-way One end of TB1 magnet exciting coil, the other end point of SR1, SR3, SR5 are connected to after one end of thyristor SR1, SR3, SR5 are in parallel It is not connected to tap C1, C2, C3；TB1 magnet exciting coil is connected in addition after one end of bidirectional thyristor SR2, SR4, SR6 are in parallel One end, the other end of SR2, SR4, SR6 are then respectively connected to tap C1, C2, C3.If auto-transformer TB2 tap C1, C2 Between output voltage U12 it is different from the output voltage U23 between C2, C3, then thyristor switch group be up to forward direction U12, forward direction U23, forward direction U12+U23, reversed U12, reversed U23, reversed U12+U23 totally 6 kinds of magnet exciting coil voltage compensation working conditions, it is additional 0 voltage compensation working condition when a kind of input voltage is within normal range (NR), the AC power source electricity of phase line input terminal L1 input Enough be at most divided into 7 voltage ranges compensates control to pressure energy.In Fig. 2, N is zero curve, and G11, G12 to G61, G62 are respectively The trigger signal input terminal of bidirectional thyristor SR1 to SR6.In Fig. 2, the ipsilateral brilliant lock of bidirectional thyristor SR1, SR3, SR5 composition Pipe, bidirectional thyristor SR2, SR4, SR6 form another ipsilateral thyristor；To avoid short circuit, cannot have 2 simultaneously in ipsilateral thyristor A and 2 or more thyristors simultaneously turn on；For example, SR1, SR3 cannot be simultaneously turned on, SR4, SR6 cannot be simultaneously turned on, etc. Deng.
Fig. 3 is auto compensating type main circuit embodiment 2, including compensator transformer TB1 and auto-transformer TB2, and 8 two-way Thyristor SR1-SR8 collectively constitutes thyristor switch group, and fuse FU1 and relay normally open switch KA-1, relay is normally closed opens It closes KA-2 and forms relay protection circuit.
In Fig. 3, the bucking coil of compensator transformer TB1 is connected in phase line, and phase line input terminal is L1, output end L2. Voltage on TB1 magnet exciting coil is controlled by thyristor switch group.Auto-transformer TB2 has 4 outputs tap C1, C2, C3, C4, One end of TB1 magnet exciting coil, SR1, SR3, SR5, SR7 are connected to after one end of bidirectional thyristor SR1, SR3, SR5, SR7 are in parallel Other end be respectively connected to tap C1, C2, C3, C4；It is connected after one end of bidirectional thyristor SR2, SR4, SR6, SR8 are in parallel To the other end of TB1 magnet exciting coil, the other end of SR2, SR4, SR6, SR8 be then respectively connected to tap C1, C2, C3, C4.If the output voltage U12 between auto-transformer TB2 tap C1, C2, the output voltage U23 between C2, C3, the output between C3, C4 Voltage U34 is respectively different, then thyristor switch group includes forward direction U12, forward direction U23, forward direction U34, forward direction U12+U23, forward direction U23 + U34, forward direction U12+U23+U34, reversed U12, reversed U23, reversed U34, reversed U12+U23, reversed U23+U34, reversed U12 + U23+U34 totally 12 kinds of magnet exciting coil voltage compensation working conditions, 0 electricity when a kind of additional input voltage is within normal range (NR) Compensation work state is pressed, the AC supply voltage of phase line input terminal L1 input, which is at best able to be divided into 13 voltage ranges, to be mended Repay control.In Fig. 3, N is zero curve, and G11, G12 to G81, G82 are respectively the trigger signal input of bidirectional thyristor SR1 to SR8 End.In Fig. 3, bidirectional thyristor SR1, SR3, SR5, SR7 form ipsilateral thyristor, bidirectional thyristor SR2, SR4, SR6, SR8 group At another ipsilateral thyristor；To avoid short circuit, cannot there is 2 and 2 or more thyristors in ipsilateral thyristor simultaneously while leading It is logical；For example, SR1, SR7 cannot be simultaneously turned on, and SR4, SR8 cannot be simultaneously turned on, etc..
Each bidirectional thyristor in Fig. 2, Fig. 3 can be substituted with the unidirectional thyristor of 2 reverse parallel connections.Fig. 2, Fig. 3 In, relay normally open switch and relay normally closed switch composition relay protection switch.
Sampling comparing unit carries out voltage sample to AC supply voltage by AC supply voltage sample circuit and is exchanged Supply voltage sampled value, the comparison circuit being made of M comparator are compared AC supply voltage sampled value, export M The voltage class fiducial value that binary number is constituted.
Fig. 4 is sampling comparing unit embodiment 1, compensates control for auto compensating type main circuit embodiment 1.Fig. 4 AC supply voltage sample circuit in, the AC supply voltage inputted from phase line L1 and zero curve N after transformer TV decompression, by The rectifier bridge rectification of diode DV1- DV4 composition, then divided through capacitor CV1 filtering and resistance RV1, RV2, it obtains and input The AC supply voltage sampled value U1 of AC supply voltage virtual value direct proportionality.
In the comparison circuit of Fig. 4, resistance RF1-RF7 forms bleeder circuit, after power supply+VCC1 partial pressure, obtains 6 threshold values Voltage UF1-UF6.6 comparator FA1-FA6 realize the ratio of AC supply voltage sampled value U1 and 6 threshold voltage UF1-UF6 Compared with the voltage class fiducial value P1 of output is made of the output J1-J6 of 6 comparator FA1-FA6, and AC supply voltage is fluctuated The voltage of interval range is divided into 7 voltage class sections.Amplifier FA0 form follower, AC supply voltage sampled value U1 pass through with After device FA0 driving, sent simultaneously to the non-inverting input terminal of comparator FA1-FA6；6 threshold voltage UF1-UF6 are sent respectively To the inverting input terminal of comparator FA1- FA6.In Fig. 4, power supply+VCC1 can also be replaced with other precision voltage sources, divided Circuit divides precision voltage source, and threshold voltage can be made more accurate.Amplifier FA0 and comparator FA1-FA6 are preferably used The rail-to-rail amplifier of single supply+VCC1 power supply, for example, LMV324, LMV358, AD8517, TLV2432, TLV2434 etc..
If the AC supply voltage fluctuation range of input is 220V ± 10%, it is desirable that stablized the model in 220V ± 2% Enclose interior output.Comparing unit embodiment 1 is sampled using Fig. 4, input can be divided into section in 242V to the voltage between 198V Voltage swing is 7 voltage class sections of 6.4V, and the voltage in 3 voltage class sections therein is higher than desired output electricity Range is pressed, needs to carry out drop compensation；The voltage in 3 voltage class sections needs to carry out lower than desired output voltage range Boosting compensation；1 voltage class section carries out 0 voltage compensation, i.e. uncompensation within desired output voltage range.6.4V Voltage range be not more than 220V ± 1.5%, meet requirement of the output control within 220V ± 2%；7 voltage of 6.4V etc. The corresponding AC supply voltage waving interval in grade section is 242.4V to 197.6V, covers the range actually fluctuated.Using figure 2 auto compensating type main circuit embodiments 1 compensate, and the output voltage U12 of auto-transformer TB2 is low, U23 high；Voltage U23 is 2 times of voltage U12；Then the input voltage of auto-transformer TB2 is alternating current 220V, is only TB1's with output voltage U12 When magnet exciting coil voltage, TB1 offset voltage is 6.4V；The input voltage of auto-transformer TB2 is alternating current 220V, only with output When voltage U23 does the magnet exciting coil voltage of TB1, TB1 offset voltage is 12.8V；The input voltage of auto-transformer TB2 is exchange 220V, while when doing using output voltage U12, U23 the magnet exciting coil voltage of TB1, TB1 offset voltage is 19.2V.Threshold value electricity Press the ratio between the selection and AC supply voltage sampled value U1 and AC supply voltage of UF1-UF6 related；If AC power source Ratio between voltage sample value U1 and AC supply voltage is 0.01, i.e. AC supply voltage sampled value U1 is AC power source The 1% of voltage effective value, then when AC supply voltage being divided into 7 voltage class sections that section voltage swing is 6.4V, 6 Threshold voltage UF1-UF6 is respectively 2.36V, 2.296V, 2.232V, 2.168V, 2.104V, 2.04V, is and separates 7 voltages The intermediate dividing voltage value of 6 of the corresponding voltage sample value of the AC supply voltage value of grade interval；According to 6 threshold voltages The size of UF1-UF6 and+VCC1 can calculate the size of resistance RF1-RF7.
In Fig. 4, resistance R11, resistance R12 and comparator FA1 form Schmidt's comparator, reasonably select resistance R11, resistance The resistance value of R12 can control the size of hysteresis voltage range, avoid AC supply voltage attached in the comparison critical point of comparator When nearly fluctuation, the frequent switching of electronic switch in thyristor switch group is caused.Resistance R21, resistance R22 are to resistance R61, resistance The effect of R62 is identical, forms Schmidt's comparator with comparator FA2 to comparator FA6 respectively.Due to auto compensating type main circuit The compensation way of embodiment 1 has Schmidt's characteristic automatically, and comparator FA1 to comparator FA6 can not also form Schmidt's ratio Compared with device, at this point, resistance R12 to resistance R62 without using with connection, resistance R11 to resistance R61 then retains either respectively short Road connection.
The embodiment 1 of Fig. 4 can also be carried out for auto compensating type main circuit embodiment 2, at this time, it may be necessary to by AC power source The voltage of voltage fluctuation interval range is divided into more voltage class sections.For example, by AC supply voltage waving interval range Voltage when being divided into 13 voltage class sections, the circuit of Fig. 4 should extend to 12 comparators, with 12 thresholds of different sizes Threshold voltage is compared, and the voltage class fiducial value P1 of output will be by 12, for example, J1-J12 is formed.
Fig. 5 is sampling comparing unit embodiment 2, for compensating control for auto compensating type main circuit embodiment 2. In Fig. 5, FD1 is that real available value detects device LTC1966, LTC1966 and transformer TV1, capacitor CV2, capacitor CV3 composition friendship Galvanic electricity source voltage sampling circuit measures the AC supply voltage virtual value inputted from phase line L1 and zero curve N, is exchanged Supply voltage sampled value U2.UIN1, UIN2 of LTC1966 is alternating voltage difference input terminal, and USS is the negative supply that can be grounded Input terminal, UDD are positive power input, and GND is ground terminal, and EN is that low level effectively enables control signal, and UOUT is voltage Output end, COM are output voltage return terminal.
In Fig. 5, FD2, resistance RD1, resistance RD2 form comparison circuit；FD2 compares display driver LM3914 for 10 grades, The internal voltage divider circuit that inside is together in series containing 10 1k Ω precision resistances, forms 10 comparative threshold voltages and is respectively connected to The positive input terminal of internal 10 comparators；6 feet are that internal voltage divider circuit is high-end, and the internal standard electricity of 7 feet is connected to through resistance RD1 Source exports VREF；4 feet are internal voltage divider circuit low side, are connected to the ground through resistance RD2；8 feet are internal standard power supply low side, even It is connected to ground；2 feet are negative power end, are connected to the ground；3 feet are positive power source terminal, are connected to power supply+VCC1；5 feet are signal input part, It is connected to AC supply voltage sampled value U2, is connected internally to the negative input end of 10 comparators；The letter that 10 feet are exported to 18 feet Number L1 to L9 is the comparator output compared with 9 comparative threshold voltages of highest as a result, wherein L1 comparison voltage highest, successively drops Low, L9 comparison voltage is minimum；The equal low level of L1 to L9 is effective, the highest priority of L1, and L1 to L9 forms voltage class fiducial value P1；The scheme control end of 9 feet is connected to 3 feet, realizes (continuous) output of the strip of L1 to L9.In Fig. 5, internal voltage divider circuit is high-end Other power supplys can also be connected to through resistance RD1, for example, power supply+VCC1.
9 comparators inside LM3914 in 10 comparators have been used in Fig. 5, and the AC supply voltage of input has been compared Divide into 10 voltage class sections.If the AC supply voltage fluctuation range of input is 220V+10% to 220V-20%, It asks to be stablized and be exported in the range of 220V ± 2%.Using the sampling comparing unit embodiment 2 of Fig. 5, will input in 242V It is divided into 10 voltage class sections that section voltage swing is 7V, 3 voltage class sections therein to the voltage between 176V Voltage be higher than require output voltage range, need to carry out drop compensation；The voltage in 6 voltage class sections is lower than requirement Output voltage range needs to carry out boosting compensation；1 voltage class section carries out 0 electricity within desired output voltage range Pressure compensation, i.e. uncompensation.The voltage range of 7V is 220V ± 1.6%, meets requirement of the output control within 220V ± 2%； The corresponding AC supply voltage waving interval in 10 voltage class sections of 7V is 244.5V to 174.5V, covers practical fluctuation Range.It is compensated using Fig. 3 auto compensating type main circuit embodiment 2, and the output voltage U12 of auto-transformer TB2 is most It is low, U23 highest；Voltage U23 is 3 times of voltage U12, and voltage U34 is 2 times of voltage U12；The then input of auto-transformer TB2 Voltage is alternating current 220V, and when only making the magnet exciting coil voltage of TB1 of output voltage U12, TB1 offset voltage is 7V；Self coupling transformation The input voltage of device TB2 is alternating current 220V, and when only making the magnet exciting coil voltage of TB1 of output voltage U23, TB1 offset voltage is 21V；The input voltage of auto-transformer TB2 is alternating current 220V, when only making the magnet exciting coil voltage of TB1 of output voltage U34, TB1 offset voltage is 14V；The input voltage of auto-transformer TB2 is alternating current 220V, while being done using output voltage U12, U23 When the magnet exciting coil voltage of TB1, TB1 offset voltage is 28V；Etc..The selection and AC supply voltage sampled value of threshold voltage Ratio between U2 and AC supply voltage is related；If the ratio between AC supply voltage sampled value U2 and AC supply voltage Example is 0.005, i.e. AC supply voltage sampled value U2 is the 0.5% of AC supply voltage virtual value, then by AC supply voltage Be divided into section voltage swing be 7V 10 voltage class sections when, 9 threshold voltages be respectively 1.1875V, 1.1525V, 1.1175V, 1.0825V, 1.0475V, 1.0125V, 0.9775V, 0.9425V, 0.9075V are and separate 10 voltage class The intermediate dividing voltage value of 9 of the corresponding voltage sample value of the AC supply voltage value in section；Internal voltage divider circuit is high-end Voltage is connected to highest comparator positive input terminal, therefore 6 foot voltages are 1.1875V.According to 9 threshold voltages and internal standard power supply Export the size of VREF (1.2V or 1.25V), and the size of internal 10 precision resistances, can calculate resistance RD1, The size of RD2.If it is required that the fluctuation range for improving the precision either input voltage of voltage compensation is bigger, it is desirable that Fig. 5's adopts When voltage class is divided into more voltage class sections by sample comparing unit embodiment 2, for example, it is desired to by AC supply voltage When the voltage of waving interval range is divided into 13 voltage class sections, 2 LM3914 can be used and realize, it will be in 2 LM3914 The series connection of internal voltage divider circuit, forms 20 comparative threshold voltages, constitutes 20 grades of comparator circuits；Select 12 grades therein it is more defeated Out, the voltage class fiducial value P1 of output will be by 12, for example, L1-L12 is formed.
The sampling comparing unit embodiment 2 of Fig. 5 can also compensate control for auto compensating type main circuit embodiment 1 The voltage of the AC supply voltage waving interval range of input need to only be divided into no more than 7 voltage class sections at this time by system, The comparison wherein no more than 6 grades is selected to export.
In the sampling comparing unit embodiment 1,2 of Fig. 4, Fig. 5, when the AC supply voltage of input exceeds maximum voltage grade When interval range, voltage class fiducial value of output etc. is all the voltage class fiducial value of maximum voltage grade interval and carries out phase The compensation answered；When the AC supply voltage of input is lower than minimum voltage levels interval range, the voltage class fiducial value of output It is compensated etc. the voltage class fiducial value for being all minimum voltage levels section and accordingly.
In addition to the sampling comparing unit embodiment of Fig. 4 or Fig. 5, either for auto compensating type main circuit embodiment 1 When embodiment 2 compensates control, it is also an option that other AC supply voltage sample circuits and comparison circuit, realize and require Function.The AC supply voltage sampled value U1 of Fig. 4 AC supply voltage sample circuit output, can send the comparison to Fig. 5 electric Road is compared, output voltage grade fiducial value；The AC supply voltage sampled value of Fig. 5 AC supply voltage sample circuit output U2 can send the comparison circuit to Fig. 4 to be compared, output voltage grade fiducial value.
Fig. 6 is coding unit embodiment, wherein Fig. 6 (a) is coding unit embodiment 1, and input is sampling comparing unit 6 voltage class fiducial values that embodiment 1 exports, FD3 select integrated encoder 74HC148, Strobe input EI to connect 0 (low electricity It is flat), 74HC148 is in coding effective status, and table 1 is corresponding menu.
Table 1
As can be seen from Figure 4, when AC supply voltage is at highest section, J1-J6 exports high level；Work as AC supply voltage When between second highest region, J1 exports low level, and J2-J6 exports high level；When AC supply voltage is in minimum section, J1-J6 exports low level, should be that the fiducial value of J6 output is effective at this time, when coding, the highest priority of J6 is successively reduced To J1, the priority of J1 is minimum.Table 1 is opposite for 7 voltage class of AC supply voltage in sampling comparing unit embodiment 1 Voltage class fiducial value P1 answering, being made of J1-J6 is encoded, obtain voltage class encoded radio P2, P2 by Y12, Y11, Y10 composition；The AC supply voltage section of 1 representative is minimum in 7 voltage class, successively increases, the 7 AC power source electricity represented Highest between pressure area.In table 1, the value of 7 Y12, Y11, Y10 corresponding with voltage class 1-7 are the effective of voltage class encoded radio Encoded radio.
Fig. 6 (b) is coding unit embodiment 2, and input is compared for 9 voltage class of sampling comparing unit embodiment 2 Value, FD4 select integrated encoder 74HC147.From the function of Fig. 5 and LM3914 it is found that when AC supply voltage is in highest section When, L1-L9 exports low level, should be that the fiducial value of L1 output is effective at this time；Between AC supply voltage is in second highest region When, L1 exports high level, and L2-L9 exports low level, should be that the fiducial value of L2 output is effective at this time；Work as AC supply voltage When in minimum section, L1-L9 exports high level；When coding, the highest priority of L1 is successively reduced to L9, and L9's is preferential Grade is minimum.Table 2 be for sampling comparing unit embodiment 2 in AC supply voltage 10 voltage class it is corresponding, by L1- The voltage class fiducial value P1 of L9 composition is encoded, and obtains voltage class encoded radio P2, P2 by Y13, Y12, Y11, Y10 group At；The AC supply voltage section of 1 representative is minimum in 10 voltage class, successively increases, the 10 AC supply voltage areas represented Between highest.In table 2, the value of 10 Y13, Y12, Y11, Y10 corresponding with voltage class 1-10 are having for voltage class encoded radio Imitate encoded radio.
Table 2
When needing to improve compensation precision, the comparison of more levels, voltage class ratio are carried out to the AC supply voltage of input When digit compared with value P1 increases, encoder inputs quantity increase accordingly, at this time can using 2 or more than 74HC148, Either using 2 or more than 74HC147, or directly constitute multi input with ROM memory, or with gate circuit Encoder circuit realizes the function of coding unit.
Fig. 7 is delay protection unit embodiment block diagram, wherein delay detection module YC1 is respectively to the voltage class of input Encoded radio Y12, Y11, Y10 carry out voltage class encoded radio Y22, Y21, Y20 after signal delay is postponed, Y22, Y21, Y20 forms P3；YC1 module simultaneously respectively to Y12, Y11, Y10 carry out Edge check obtain Edge check signal Y32, Y31, Y30；Trigger region does not control signal generator module YC2 and Edge check signal Y32, Y31, Y30 of input is converted to not trigger region Control signal P4 output.In the embodiment block diagram of Fig. 7, delay detection module YC1 input voltage class encoded radio only have Y12, Y11, Y10 etc. 3, K is equal to 3；If K be equal to 4, delay detection module YC1 input voltage class encoded radio by 4 two into Value composition processed, for example, carrying out the voltage class encoded radio phase after signal delay is postponed when by Y13, Y12, Y11, Y10 Should also there are Y23, Y22, Y21, Y20 etc. 4, Edge check is carried out to Y13, Y12, Y11, Y10 and obtains Edge check signal Have Y33, Y32, Y31, Y30 etc. 4, trigger region control signal generator module YC2 input Edge check signal also have Y33, Y32, Y31, Y30 etc. 4.
Fig. 8 is the delay detection circuit embodiment 1 for encoding value signal Y10 in delay detection module needle to voltage class.Electricity Hinder RY0, capacitor CY0, driving gate FY0 realize the signal delay of Y10 is obtained Y10 it is delayed after signal Y20.Resistance RY1, Capacitor CY1, diode DY1, phase inverter FY1 composition are directed to the rising edge detection circuit of input signal Y 10, and phase inverter FY1's is defeated Out in signal YP1, the pulse of corresponding negative pulse form is exported after Y10 rising edge.Resistance RY2, capacitor CY2, Diode DY2, phase inverter FY2, FY3 composition are directed to the failing edge detection circuit of input signal Y 10, the output letter of phase inverter FY3 In number YP2, the pulse of corresponding negative pulse form is exported after Y10 failing edge.NAND gate FY4 is accomplished that negative Logic or logic function, when there is negative pulse generation in input signal Y P1, YP2, NAND gate FY4 output Edge check letter Positive pulse is generated in number Y30, i.e., when input signal Y 10 changes, NAND gate FY4 exports the simple venation of a positive pulse form Punching.In Fig. 8, the device of driving gate FY0, phase inverter FY1, phase inverter FY3 preferably with Schmidt's input, for example, phase inverter selects 74HC14, CD40106 etc.；Driving gate FY0 can be made of 2 phase inverters with Schmidt's input.
Fig. 9 is the delay detection circuit embodiment 2 for encoding value signal Y10 in delay detection module needle to voltage class.Instead Phase device FY5, resistance RY3, capacitor CY3 carry out reverse phase and delay to input signal Y 10, obtain the delayed inversion signal of Y10 YP0；Phase inverter FY6 again by YP0 reverse phase, obtain Y10 it is delayed after signal Y20.NAND gate FY7 input signal be Y10 and The pulse of negative pulse form corresponding with Y10 rising edge is generated in Y10 delayed inversion signal YP0, output signal YP1； Or the signal of door FY8 input is the delayed inversion signal YP0 of Y10 and Y10, is generated and Y10 failing edge phase in output signal YP2 The pulse for the negative pulse form answered.NAND gate FY9 is accomplished that negative logic or logic function, when input signal Y P1, YP2 In when having negative pulse generation, generate positive pulse in the Edge check signal Y30 of NAND gate FY9 output, i.e., when input signal Y 10 has When variation, NAND gate FY9 exports the pulse of a positive pulse form.In Fig. 9, phase inverter FY6, NAND gate FY7 or door FY8 It is preferred that the device with Schmidt's input, for example, phase inverter selects 74HC14, CD40106 etc.；NAND gate selection 74HC132, CD4093 etc.；Or door selects 74HC7032, or 2 phase inverters with Schmidt's input of selection and 1 NAND gate to come in fact Existing or door function.
Figure 10 is the delay detection circuit embodiment 3 for encoding value signal Y10 in delay detection module needle to voltage class, In the rising edge detection circuit for input signal Y 10 formed by resistance RY1, capacitor CY1, diode DY1, phase inverter FY1, Electricity is detected with the failing edge for being directed to input signal Y 10 is made of resistance RY2, capacitor CY2, diode DY2, phase inverter FY2, FY3 Road, and it is identical as the embodiment 1 of Fig. 8 using the circuit of NAND gate FY4 output Edge check signal Y30.In Figure 10, by reverse phase Device FY11, FY12, FY13, FY14 realize the signal delay of Y10 is obtained Y10 it is delayed after signal Y20.
The embodiment 1-3 of Fig. 8, Fig. 9, Figure 10 are the delay detection electricity for the signal Y10 in voltage class encoded radio Road, for other signals in voltage class encoded radio, for example, it is directed to input signal Y 12, the delay detection circuit of Y11, and The delay detection circuit of Y13 in 4 voltage class encoded radios is delayed with input signal Y 10 is directed in corresponding embodiment The circuit structure of detection is as function.Delay detection circuit can also realize its function using other circuits met the requirements Energy.
The function of trigger region control signal generator module is, when any one of Edge check signal of input or It is multiple when having pulse relevant to edge, a pulse is not exported in trigger region control signal.Figure 11 is not trigger Area controls signal generator module embodiment, by or door FY10 realize that the input signal of corresponding function or door FY10 are that edge is examined Signal Y32, Y31, Y30 are surveyed, exports and controls signal P4 for not trigger region.In Figure 11 embodiment, not trigger region control signal output Pulse be positive pulse, i.e., not trigger region control signal high level it is effective；When or door FY10 change nor gate into when, not trigger region The pulse for controlling signal output is negative pulse, and trigger region control signal low level is not effective.If the Edge check letter of input The pulse relevant to edge that has generated in number Y32, Y31, Y30 is negative pulse, then in Figure 11 or door should be changed to NOT gate either with door, realizes under negative logic or logic function.If the Edge check signal of input has 4, Tu11Zhong Or door, or for realizing other doors of not trigger region control signal generator module function, for example, nor gate, NAND gate, It is also accordingly 4 in-gate circuits with door etc..
Figure 12 is that split-phase closes waveform diagram in the middle part of delay protection unit.In Figure 12, the Y10 in voltage class encoded radio divides Not Fa Sheng rising edge change and failing edge changes, Y20 is the voltage class encoded radio after the Y10 delay T1 time；Fig. 8's In the detection circuit embodiment 1 that is delayed, T1 is determined by the product size (i.e. time constant size) of resistance RY0 and capacitor CY0；Scheming In 9 delay detection circuit embodiment 2, T1 is determined by the product size of resistance RY3 and capacitor CY3；It is detected in the delay of Figure 10 In circuit embodiments 3, T1 is determined by the gate delay time size of phase inverter FY11, FY12, FY13, FY14 itself.In Figure 12, Because the negative pulse width that Y10 rising edge generates is T2 in signal YP1；In the delay detection circuit embodiment 1 and Figure 10 of Fig. 8 In the detection circuit embodiment 3 that is delayed, T2 is determined by the product size of resistance RY1 and capacitor CY1；In the delay detection circuit of Fig. 9 In embodiment 2, T2 is determined by the product size of resistance RY3 and capacitor CY3.In Figure 12, because Y10 failing edge generates in signal YP2 Negative pulse width be T3；In the delay detection circuit embodiment 1 of Fig. 8 and the delay detection circuit embodiment 3 of Figure 10, T3 by The product size of resistance RY2 and capacitor CY2 determines；In the delay detection circuit embodiment 2 of Fig. 9, T3 is by resistance RY3 and capacitor The product size of CY3 determines.In Figure 12,2 positive pulses in Edge check signal Y30 respectively in signal YP1 because Y10 rises Because the negative pulse that Y10 failing edge generates corresponds to along the negative pulse and signal YP2 generated.It is located at Figure 12 voltage class encoded radio In Y10 when rising edge occurs changing, no change has taken place by Y11, Y12 in voltage class encoded radio, at this time its corresponding side Positive pulse is not generated along detection signal Y31, Y32；If when failing edge, which occurs, for Y10 changes, in voltage class encoded radio Y11, Y12 change simultaneously, generate in its corresponding Edge check signal Y31, Y32 respectively change phase with Y11, Y12 at this time The positive pulse of pass.According to the logic function of not trigger region above-mentioned control signal generator module, trigger region control signal is not generated It is generated jointly in the single pulse width of module output and the Edge check signal of input widest in the input pulse of the pulse Pulse width is identical.In Figure 12, the 1st positive pulse in trigger region control signal P4 be not by the 1st in Edge check signal Y30 A negative pulse generates, then the two equivalent width；The 2nd positive pulse in trigger region control signal P4 be not by Edge check signal The 2nd negative pulse in Y30 and the negative pulse joint effect in Edge check signal Y31, Y32 generate, and width and generation should The widest negative pulse width of width is identical in 3 negative pulses of positive pulse；As can be seen from Figure 12, the negative pulse width in Y32 is most wide, The 2nd positive pulse width in P4 is identical as the negative pulse width in Y32.This width difference is because of different delayed time detection circuit Caused by the resistance of middle decision T2, T3, the difference of capacitance.
It is delayed in detection circuit embodiment 1 in the delay protection unit of Fig. 8, voltage class encoded radio changes to right When the delay time in the not trigger region control signal pulse forward position answered is the delay of FY10 in gate circuit FY1, FY4 and Figure 11 Between the sum of or gate circuit FY3, FY4 and Figure 11 in FY10 the sum of delay time；By multiplying for resistance RY0 and capacitor CY0 The range of choice of the signal delay time T1 for the voltage class encoded radio that product size determines is the ms order of magnitude, it is clear that is greater than voltage Grade encoded radio changed to the delay time in corresponding not trigger region control signal pulse forward position, i.e. grade encoded radio is believed Number delay is later than forward position moment of the pulse exported after voltage class encoded radio changes at the time of change.Strictly speaking, T1 actually includes the sum of lag time and the delay time of gate circuit FY0 caused by resistance RY0 and capacitor CY0.Fig. 8 In embodiment 1, in selection parameter, the value of the value and T3 that make T2 is all larger than the value of T1, changes grade encoded radio signal delay Meet the rear requirement along the moment of the pulse exported after need to changing earlier than voltage class encoded radio at the time of change.
It is delayed in detection circuit embodiment 2 in the delay protection unit of Fig. 9, voltage class encoded radio changes to right When the delay time in the not trigger region control signal pulse forward position answered is the delay of FY10 in gate circuit FY7, FY9 and Figure 11 Between the sum of or gate circuit FY8, FY9 and Figure 11 in FY10 the sum of delay time；T1 is the numerical value of the ms order of magnitude, is shown So, the signal delay time T1 of the voltage class encoded radio determined at this time by the product size of resistance RY3 and capacitor CY3 is greater than Voltage class encoded radio changed to the delay time in corresponding not trigger region control signal pulse forward position, i.e. voltage class Encoded radio signal delay is later than the forward position moment of the pulse exported after voltage class encoded radio changes at the time of change.Figure In 9 delay detection circuit embodiment 2, occur at the time of voltage class encoded radio signal delay changes with voltage class encoded radio The rear of the pulse exported after change is influenced by signal YP0 change along the moment；Voltage class encoded radio signal delay changes At the time of change for signal YP0 after delay again through gate circuit FY6；The pulse that voltage class encoded radio exports after changing It is rear along the moment be the sum of delay time again through FY10 in gate circuit FY7, FY9 and Figure 11 after signal YP0 changes, either The sum of delay time after signal YP0 change again through FY10 in gate circuit FY8, FY9 and Figure 11；Obviously, voltage class is compiled at this time The rear of the pulse that code value signal delay exports after changing at the time of change than voltage class encoded radio few passes through 2 along the moment The delay time of a gate circuit, meeting at the time of voltage class encoded radio signal delay changes need to send out earlier than voltage class encoded radio The rear requirement along the moment of the pulse exported after raw change.
Figure 13 is the embodiment for interlocking control unit, and Figure 13 (a) is interlocking control unit embodiment 1, and YR1 therein is ROM memory.If the output voltage U12 of auto-transformer TB2 is low, U23 high in Fig. 2 auto compensating type main circuit embodiment 1； Voltage U23 is 2 times of voltage U12.Table 3 is that interlocking control unit embodiment 1 is exported for Fig. 6 (a) coding unit embodiment 1 And the voltage class encoded radio through delay protection cell delay carries out the logic true value table of logic control；AC supply voltage fluctuation Range is 220V ± 10%, it is desirable that is stablized and is exported in the range of 220V ± 2%.Mutual lock control is realized using ROM memory When the logic function of unit processed, P4, Y22-Y20 postpone address input end A3-A0, the ROM storage for being connected to ROM memory respectively The data output D0- D5 of device is the logic output for interlocking control unit, and 6 output signal P51-P56 form Trig control signal P5。
In table 3, trigger region does not control invalidating signal, and P4 is equal to 0, and voltage class encoded radio is corresponding with voltage class 1-7 Value when, interlocking control unit control auto compensating type main circuit embodiment 1 carry out corresponding voltage compensation；For example, input electricity When pressure is minimum voltage class 1, control P51, P56 output remove to open bidirectional thyristor SR1, SR6 for 0, control P52 etc. other Output goes to turn off other bidirectional thyristors for 1, carries out positive benefit using the magnet exciting coil voltage that output voltage U12+U23 is TB1 It repays；When input voltage is voltage class 2, control P53, P56 output go to open bidirectional thyristor SR3, SR6, control P51 etc. for 0 Other outputs go to turn off other bidirectional thyristors for 1, carry out only with the magnet exciting coil voltage that output voltage U23 is TB1 positive Compensation；When input voltage is voltage class 4, control P55, P56 output goes to open bidirectional thyristor SR5, SR6 for 0, controls P51 It goes to turn off other bidirectional thyristors for 1 Deng other outputs, realizes 0 voltage compensation；When input voltage is voltage class 5, control P52, P53 output go to open bidirectional thyristor SR2, SR3 for 0, other outputs such as control P51 go to turn off other two-way brilliant locks for 1 Pipe carries out Contrary compensation only with the magnet exciting coil voltage that reversed output voltage U12 is TB1；Etc..When P4 is equal to 1, show There is fluctuation in AC supply voltage, voltage class encoded radio is made to produce variation, need to carry out the combination of thyristor switch group on-off The switching of state changes compensation way.In the handoff procedure of electronic switch, to avoid thyristor in thyristor switch group from switching When, because the factor that electronic switch is delayed to turn off causes power supply short circuit, for example, thyristor SR1, SR3 are simultaneously turned on and are caused short circuit Situations such as, when not trigger region controls the signal valid period, i.e. the P4 of embodiment is equal to 1, own in cutoff thyristor switching group Bidirectional thyristor, interlocking control unit control P51-P56 all output 1.
Table 3
In table 3, not when trigger region control invalidating signal (P4 is equal to 0), the efficient coding value of 7 voltage class encoded radio P3 7 groups of effective Trig control signals are corresponding with, accordingly realize the control of 7 kinds of voltage compensation states；When P2 change makes P4 effectively (P4 Equal to 1) when be corresponding with 1 group of effective Trig control signal, interlocking control unit exports altogether 8 groups of effective Trig control signals.When P4 invalid (P4 is equal to 0), and when the voltage class encoded radio P3 for interlocking control unit input is invalid code value, mutual lock control list Member 1 group of invalid Trig control signal of corresponding output；The voltage class encoded radio P2 of Fig. 6 (a) coding unit embodiment 1 and through prolonging The voltage class encoded radio P3 to lag has 7 efficient coding values, and being only possible to existing 1 invalid code value is 000.In table 3, It is 1 that 1 group of invalid Trig control signal, which makes P56 output be 0, P51-P55 output,；The specific invalid Trig control signal is not The practical control for carrying out thyristor also only makes TB1 magnet exciting coil be connected to self coupling even if playing the triggering control action of thyristor A tap and excitation voltage of transformer TB2 is 0, without voltage compensation；This 1 group specifically invalid Trig control signal is also It can choose other not and can be carried out the triggering combination of voltage compensation, for example, P55 output is made to be 0, others output is 1.
In table 3, low level is effective when the Trig control signal triggering bidirectional thyristor of interlocking control unit output is connected.Such as The Trig control signal that fruit interlocks control unit output requires to be that high level is effective when triggering bidirectional thyristor conducting, then table 3 is patrolled 1 in the output signal of volume truth table, which needs to change into 0,0, needs to change into 1；When realizing its function with ROM memory, storage The content of unit is according to 3 reverse phase of table.
Figure 13 (b) is interlocking control unit embodiment 2, and YR2 therein is ROM memory.If the main electricity of Fig. 3 auto compensating type In road embodiment 2, the output voltage U12 of auto-transformer TB2 is minimum, U23 highest；Voltage U23 is 3 times of voltage U12, voltage U34 is 2 times of voltage U12.Table 4 is that interlocking control unit is exported for Fig. 6 (b) coding unit embodiment 2 and through delay protection The voltage class encoded radio of cell delay carries out logic true value table when logic control；AC supply voltage fluctuation range is 220V + 10% to 220V-20%, it is desirable that stablized and exported in the range of 220V ± 2%.Using the mutual lock control list of Figure 13 (b) The embodiment 2 of member, i.e., when realizing its logic function using ROM memory YR2, input P4, Y23-Y20 are connected to ROM memory Address end A4-A0, ROM memory data output D0-D7 be interlock control unit logic export, 8 output signals P51-P58 forms Trig control signal P5.In table 4, trigger region does not control invalidating signal, and P4 is equal to 0, and voltage class encoded radio is When value corresponding with voltage class 1-10, interlocking control unit control auto compensating type main circuit embodiment 2 carries out corresponding electricity Pressure compensation；For example, control P57, P58 output goes to open bidirectional thyristor SR7, SR8 when input voltage is voltage class 7 for 0, Other outputs such as control P51 go to turn off other bidirectional thyristors for 1, realize 0 voltage compensation；Input voltage is voltage class 8 When, control P52, P53, which export, to be gone to open bidirectional thyristor SR2, SR3 for 0, other outputs such as control P51 go to turn off other pairs for 1 To thyristor, Contrary compensation is carried out only with the magnet exciting coil voltage that reversed output voltage U12 is TB1；Input voltage is voltage When grade 9, control P56, P57 output go to open bidirectional thyristor SR6, SR7 for 0, other outputs such as control P51 go to turn off for 1 Other bidirectional thyristors carry out Contrary compensation only with the magnet exciting coil voltage that reversed output voltage U34 is TB1；Input voltage When for voltage class 10, control P54, P55 output go to open bidirectional thyristor SR4, SR5 for 0, other outputs such as control P51 are 1 It goes to turn off other bidirectional thyristors, carries out Contrary compensation only with the magnet exciting coil voltage that reversed output voltage U23 is TB1；It is defeated When to enter voltage be voltage class 6, control P51, P54 output remove to open bidirectional thyristor SR1, SR4 for 0, other are defeated by control P52 etc. It goes to turn off other bidirectional thyristors for 1 out, carries out positive compensation only with the magnet exciting coil voltage that output voltage U12 is TB1； When input voltage is voltage class 4, control P53, P56 output remove to open bidirectional thyristor SR3, SR6 for 0, control P51 etc. other Output goes to turn off other bidirectional thyristors for 1, carries out positive benefit only with the magnet exciting coil voltage that output voltage U23 is TB1 It repays；When input voltage is voltage class 3, control P51, P56 output go to open bidirectional thyristor SR1, SR6, control P52 etc. for 0 Other outputs go to turn off other bidirectional thyristors for 1, are carried out just using the magnet exciting coil voltage that output voltage U12+U23 is TB1 To compensation；When input voltage is voltage class 1, control P51, P58 output goes to open bidirectional thyristor SR1, SR8 for 0, controls Other outputs such as P52 go to turn off other bidirectional thyristors for 1, and the magnet exciting coil of TB1 is done using output voltage U12+U23+U34 Voltage carries out positive compensation；Etc..Trigger region control signal is not effective, and when P4 is equal to 1, showing AC supply voltage, there are waves It is dynamic, so that voltage class encoded radio is produced variation, need to carry out the switching of thyristor switch group on-off assembled state, changes compensation Mode, all bidirectional thyristors in cutoff thyristor switching group, interlocking control unit control P51-P58 all export 1 at this time.
In table 4, not when trigger region control invalidating signal (P4 is equal to 0), the efficient coding of 10 voltage class encoded radio P3 Value is corresponding with 10 groups of effective Trig control signals, accordingly realizes the control of 10 kinds of voltage compensation states；When P2 change keeps P4 effective When (P4 is equal to 1), it is corresponding with 1 group of effective Trig control signal, interlocking control unit shares 11 groups of effective Trig control signals. When P4 invalid (P4 is equal to 0), and when the voltage class encoded radio P3 for interlocking control unit input is invalid code value, mutual lock control Unit processed is corresponding with 1 group of specifically invalid Trig control signal；The voltage class encoded radio P2 of Fig. 6 (b) coding unit embodiment 2 And it is delayed after voltage class encoded radio P3 have 10 efficient coding values, it is also possible to export 6 invalid code values；Output 6 Interlocking control unit is set to export same 1 group specifically invalid Trig control signal when a invalid code value；In table 4, this 1 group It is 1 that invalid Trig control signal, which makes P58 output be 0, P51-P57 output,；The specific invalid Trig control signal is without crystalline substance The practical control of brake tube also only makes TB1 magnet exciting coil be connected to auto-transformer even if playing the triggering control action of thyristor A tap and excitation voltage of TB2 is 0, without voltage compensation；This 1 group specifically invalid Trig control signal can also select It selects other not and can be carried out the triggering combination of voltage compensation, for example, P57 output is made to be 0, others output is 1.
In table 4, low level is effective when the Trig control signal triggering bidirectional thyristor of interlocking control unit output is connected.Such as High level is effective when the Trig control signal that fruit interlocks control unit output requires triggering bidirectional thyristor to be connected, then 4 logic of table 1 in the output signal of truth table, which needs to change into 0,0, needs to change into 1；When realizing its function with ROM memory, storage is single The content of member is according to 4 reverse phase of table.
Combination logic function in either 4 truth table of table of table 3, can also be using the other modes except ROM memory It goes to realize.
Table 4
Figure 14 be trigger unit in trigger bidirectional thyristor SR1 trigger circuit embodiment, by altemating trigger optocoupler UG1, Resistance RG1, resistance RG2 composition, Trig control signal P51 low level are effective.Altemating trigger optocoupler UG1 can choose The phase shifts type bidirectional thyristor output light thermocouple such as MOC3021, MOC3022, MOC3023, MOC3051, MOC3052, MOC3053 Clutch.Power supply+VCCK is the controlled source controlled by error detection control unit.It triggers in Fig. 2 auto compensating type main circuit embodiment 1 Bidirectional thyristor SR2-SR8 in bidirectional thyristor SR2-SR6, or triggering Fig. 3 auto compensating type main circuit embodiment 2 Trigger circuit is as the circuit structure of triggering bidirectional thyristor SR1.The altemating trigger optocoupler UG1 of Figure 14 is exported from G11, G12 Trigger pulse and trigger unit in other altemating trigger optocouplers output trigger pulse collectively constitute trigger signal P6.
Figure 15 is error detection control unit embodiment, wherein YR3 is ROM memory, and ROM memory forms discrimination module, is used In judge input Trig control signal P5 whether be effective Trig control signal；Triode VT, triode VK1, triode VK2, relay coil KA, freewheeling diode VD, resistance RK1, resistance RK2, resistance RK3 composition protection control circuit.+ VCC2 is The power supply of relay coil and the source current of trigger unit controlled source.
The error detection control unit embodiment of Figure 15 is used for the triggering issued for Figure 13 (a) interlocking control unit embodiment 1 Control signal is judged that table 5 is to judge to interlock whether the Trig control signal that control unit embodiment 1 issues is effectively to trigger The logic true value table of signal is controlled, auto-transformer forms thyristor switch group by 3 taps, by 6 bidirectional thyristors at this time.
Table 5
When the Trig control signal that interlocking control unit embodiment 1 issues effectively touches for 8 groups listed by 8 rows of front in table 5 When hair controls 1 group in signal, the triggering control of discrimination module output differentiates that signal is effective, i.e. P7 is 1, expression triggering control letter Number be effective Trig control signal, triode VK1, VK2 conducting, controlled source+VCCK obtain it is electric, trigger unit work normally, according to Corresponding trigger pulse is issued according to Trig control signal.P7 be 1 simultaneously control triode VT conducting, relay coil KA obtain it is electric, It is closed the relay normally open switch KA-1 in Fig. 2 auto compensating type main circuit embodiment 1, relay normally closed switch KA-2 is disconnected It opens, thyristor switch group is in compensation work state.When the Trig control signal that interlocking control unit embodiment 1 issues is other Signal, when not being any 1 group in 8 groups of effective Trig control signals listed by 8 rows of front in table 5, the touching of discrimination module output Hair control differentiates that invalidating signal, i.e. P7 are 0, triode VK1, VK2 cut-off, controlled source+VCCK power loss, trigger unit not work Make, i.e., does not issue the trigger pulse of triggering thyristor.P7 is 0 while controlling triode VT cut-off, and relay coil KA power loss makes Relay normally open switch KA-1 in Fig. 2 auto compensating type main circuit embodiment 1 is disconnected, i.e. control disconnects the defeated of auto-transformer Enter side supply voltage, make the voltage 0 between all taps of auto-transformer, realizes the protection to thyristor switch group；Control Relay normally closed switch KA-2 closure, makes the voltage 0 being applied on TB1 magnet exciting coil.When interlocking control unit embodiment 1 Input is invalid code value, and when exporting invalid Trig control signal, and as can be seen from Table 5, it is 0 that discrimination module, which equally export, Realize the protection to thyristor switch group；Therefore, either because the failure that code error occurs in coding unit causes to export There is control mistake and cause to output invalid Trig control signal, error detection control in invalid code value, or interlocking control unit Unit processed, which starts, protects thyristor switch group.When the logic true value table of table 5 is realized using ROM memory, ROM is deposited The address input of reservoir needs 6, i.e. a0-a5 in table 5 is correspondingly connected with input signal P51-P56；The data of ROM memory Output needs 1, i.e. d0 in table 5 is correspondingly connected with the control signal P7 of output.
When error detection control unit need for Figure 13 (b) interlocking control unit embodiment 2 issue Trig control signal into When row judges, table 6 is to judge to interlock whether the Trig control signal that control unit embodiment 2 issues is effective triggering control letter Number logic true value table, auto-transformer forms thyristor switch group by 4 taps, by 8 bidirectional thyristors at this time.
Table 6
When the Trig control signal that interlocking control unit embodiment 2 issues is effective for 11 groups listed by 11 rows of front in table 6 When 1 group in Trig control signal, the triggering control of discrimination module output differentiates that signal is effective, i.e. P7 is 1, indicates triggering control Signal is effective Trig control signal, and triode VK1, VK2 are connected, and controlled source+VCCK obtains electric, trigger unit normal work, Corresponding trigger pulse is issued according to Trig control signal.P7 is in 1 while 3 auto compensating type main circuit embodiment 2 of control figure Relay normally open switch KA- 1 be closed, relay normally closed switch KA-2 is disconnected, and circuit is in compensation work state.Work as interlocking Control unit embodiment 2 issue Trig control signal be other signals, be not in table 6 front 11 rows listed by 11 groups effectively touch When hair controls any 1 group in signal, the triggering control of discrimination module output differentiates that invalidating signal, i.e. P7 are 0, triode VK1, VK2 cut-off, controlled source+VCCK power loss, trigger unit do not work, i.e., do not issue the trigger pulse of triggering thyristor.P7 is 0 same When 3 auto compensating type main circuit embodiment 2 of control figure in relay normally open switch KA-1 disconnect, i.e., control disconnect self coupling become The input side supply voltage of depressor makes the voltage 0 between all taps of auto-transformer, realizes the guarantor to thyristor switch group Shield；Relay normally closed switch KA-2 closure is controlled, the voltage 0 being applied on TB1 magnet exciting coil is made.When interlocking control unit The input of embodiment 2 is invalid code value, and when exporting invalid Trig control signal, as can be seen from Table 6, discrimination module output It is 0, realizes the protection to thyristor switch group；Similarly, either because the failure that code error occurs in coding unit is led Cause outputs invalid code value, or interlocking control unit control mistake occurs and causes to output invalid Trig control signal, Error detection control unit, which starts, protects thyristor switch group.When table 6 logic true value table using ROM memory realize, For example, the address of the ROM memory YR3 in Figure 15 is defeated when realizing the function of error detection control unit using the embodiment of Figure 15 Enter to need to be expanded to 8, i.e. address input needs a0-a7, is correspondingly connected with input signal P51-P58；The data of ROM memory are defeated 1, i.e. d0 in table 6 are needed out, are correspondingly connected with the control signal P7 of output.
Combination logic function in either 6 truth table of table of table 5, can also be using the other modes except ROM memory It goes to realize.
When the Trig control signal of error detection control unit judgement input is not effective Trig control signal, sending protection is controlled Signal is to auto compensating type main circuit, and when thyristor switch group being made to be in guard mode, auto compensating type AC voltage regulator is not right Input voltage compensates, and the voltage of voltage-stablizer output is the AC supply voltage inputted.It is in and protects in thyristor switch group When shield state, if the Trig control signal of error detection control unit judgement input reverts to effective Trig control signal, error detection Control unit is automatically stopped the guard mode of thyristor switch group, and thyristor switch group is in compensation work state again.
From above embodiment and its course of work it is found that as long as error detection control unit judges the triggering control letter of input Number it is not effective Trig control signal, i.e., when Trig control signal is invalid, is not then issuing the trigger pulse of triggering thyristor Meanwhile starting and thyristor switch group is made to be in guard mode；It is protected exporting effective Trig control signal by interlocking control unit Ipsilateral thyristor does not simultaneously turn in card auto compensating type main circuit thyristor switch group, realizes the same of the mutual lock control of thyristor When, also there is logic error to other improper control logic mistakes of appearance, including coding unit in system, and it is invalid to output There is logic error in encoded radio, and interlocking control unit, when outputing invalid Trig control signal, are opened by error detection control unit It moves and thyristor switch group is made to be in guard mode；When thyristor switch group is in guard mode, if error detection control unit Judge that auto compensating type AC voltage regulator reenters normal logic control state, the i.e. touching of error detection control unit judgement input When hair control signal reverts to effective Trig control signal, then it can be automatically stopped the guard mode of thyristor switch group and make it Again it is in compensation work state.It is abnormal for the course of work that above-mentioned function effectively strengthens auto compensating type AC voltage regulator Protection, keep the work of the auto compensating type AC voltage regulator relatively reliable.
In above each embodiment attached drawing, all ROM memories, logic gates and logic function integrated circuit are adopted It is powered with single supply+VCC1.Except for the technical features described in the specification, auto compensating type AC voltage-stabilizing control of the present invention is realized The other technologies of method are the routine techniques that those skilled in the art are grasped.

Claims (9)

1. a kind of auto compensating type AC voltage-stabilizing control method, it is characterised in that: by AC supply voltage waving interval range Voltage is divided into multiple voltage class sections to compensate control；By the on-off assembled state control of thyristor in thyristor switch group 01 or multiple voltage superpositions in the system selection multiple output voltages of auto-transformer, as compensation transformation The magnet exciting coil voltage of device realizes voltage compensation state corresponding with voltage class section；Each voltage of AC supply voltage Grade interval corresponds to a voltage compensation state；The on-off assembled state of thyristor is by Trig control signal in thyristor switch group Trigger pulse control is issued by trigger unit；
AC supply voltage is sampled to obtain voltage class encoded radio, multiple efficient coding values in voltage class encoded radio It is corresponded with multiple voltage class sections；It is corresponding to change thyristor in thyristor switch group when voltage class encoded radio changes On-off assembled state change compensation work state；When changing the on-off assembled state of thyristor in thyristor switch group, Between its successive 2 kinds of on-off assembled state, not trigger region time is maintained, all brilliant locks in cutoff thyristor switching group Pipe；
The trigger region time is not realized by not trigger region control signal for the maintenance one；Trigger region does not control signal in voltage for control Grade encoded radio exports a pulse after changing；Trigger region control signal is not effective during exporting pulse, non- It is invalid during exporting pulse；When trigger region control signal is not effective, not trigger region time is maintained；
The Trig control signal for controlling thyristor switch group is generated by the voltage class encoded radio control postponed；The voltage etc. of delay The grade coding value signal change moment is later than after voltage class encoded radio changes in not trigger region control signal before pulse Along the moment, and after changing earlier than voltage class encoded radio not in trigger region control signal pulse it is rear along the moment；
In the Trig control signal for controlling thyristor switch group, the effective Trig control signal of M+2 group is shared, wherein M+1 group is used for Realize the compensation control in M+1 voltage class section of AC supply voltage, 1 group for all crystalline substances in cutoff thyristor switching group Brake tube；The M is more than or equal to 1；
Effective Trig control signal for all thyristors in cutoff thyristor switching group has in not trigger region control signal It is exported when effect；For realizing the M+1 group effectively triggering control letter of M+1 voltage class section compensation control of AC supply voltage Number, it is exported when not trigger region controls invalidating signal and voltage class encoded radio is 1 in M+1 efficient coding value；
Whether Trig control signal is correctly differentiated；When Trig control signal is correct, the work electricity of trigger unit is opened Source, trigger unit issue corresponding thyristor triggering impulse according to the Trig control signal of input；When Trig control signal mistake When, the working power of trigger unit is cut off, trigger unit stops issuing thyristor triggering impulse；When Trig control signal mistake When, control thyristor switch group is in guard mode.
2. auto compensating type AC voltage-stabilizing control method according to claim 1, it is characterised in that: control thyristor switch Specific method of the group in guard mode is that the input side supply voltage that control disconnects auto-transformer comes to thyristor switch group It is protected.
3. auto compensating type AC voltage-stabilizing control method according to claim 2, it is characterised in that: at thyristor switch group Under guard mode, when Trig control signal reverts to correct signal, it is automatically stopped the guard mode of thyristor switch group.
4. auto compensating type AC voltage-stabilizing control method according to claim 3, it is characterised in that: obtain voltage class and compile Code value is realized by sampling comparing unit and coding unit；It samples comparing unit and voltage sample, output is carried out to AC supply voltage Voltage class fiducial value is to coding unit, coding unit output voltage grade encoded radio.
5. auto compensating type AC voltage-stabilizing control method according to claim 4, it is characterised in that: encoded to voltage class Value is postponed and is generated not trigger region control signal and realized by delay protection unit；Delay protection unit input voltage grade is compiled Code value, exports the voltage class encoded radio after postponing and trigger region does not control signal.
6. auto compensating type AC voltage-stabilizing control method according to claim 5, it is characterised in that: Trig control signal by Control unit is interlocked to realize；Interlock control unit input delay after voltage class encoded radio and not trigger region control signal, it is defeated Thyristor switch group Trig control signal is controlled out；When trigger region control invalidating signal and voltage class encoded radio are not invalid compile When code value, interlocking control unit exports 1 group of specifically invalid Trig control signal.
7. auto compensating type AC voltage-stabilizing control method according to claim 5, it is characterised in that: delay protection unit by Delay detection module and not trigger region control signal generator module composition；It include K identical delay inspections in delay detection module Slowdown monitoring circuit, each delay detection circuit input signal is postponed after output signal, while to input signal Edge check is carried out, Edge check signal is exported；K delay detection circuit carries out signal to K voltage class encoded radios respectively Delay, the position the K voltage class encoded radio after being postponed, and Edge check is carried out to K voltage class encoded radios, obtain K A Edge check signal；Trigger region does not control signal generator module and K Edge check signal of input is converted to not trigger region Control signal output.
8. auto compensating type AC voltage-stabilizing control method according to claim 7, it is characterised in that: K identical delays In detection circuit, each delay detection circuit include resistance RY3, capacitor CY3, phase inverter FY5, phase inverter FY6, NAND gate FY7, Or door FY8, NAND gate FY9；Phase inverter FY5 input terminal is connected to input signal end；One end of resistance RY3 is connected to phase inverter FY5 output end, other end are respectively connected to one of one end of capacitor CY3, an input terminal of NAND gate FY7 or door FY8 The input terminal of input terminal, phase inverter FY6；The other end of capacitor CY3 is connected to ground terminal, another input of NAND gate FY7 End is connected to input signal end or another input terminal of door FY8 is connected to input signal end；2 inputs of NAND gate FY9 End is respectively connected to NAND gate FY7 output end or door FY8 output end；Phase inverter FY6 output end is the output signal after delay End；NAND gate FY9 output end is Edge check signal output end.
9. auto compensating type AC voltage-stabilizing control method according to claim 7, it is characterised in that: not trigger region control letter Number generation module is with K input signal end or door FY10；Or the K input signal end of door FY10 is respectively connected to K Edge check signal output end in the detection circuit that is delayed；Or trigger region does not control signal for the output end output of door FY10.
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