CN109358680A

CN109358680A - Three-phase ac voltage stabilizer

Info

Publication number: CN109358680A
Application number: CN201811355958.7A
Authority: CN
Inventors: 周维龙; 凌云; 文定都; 刘建华; 杨兴果
Original assignee: Hunan University of Technology
Current assignee: Xia Jun
Priority date: 2018-11-15
Filing date: 2018-11-15
Publication date: 2019-02-19
Anticipated expiration: 2038-11-15
Also published as: CN109358680B

Abstract

A kind of three-phase ac voltage stabilizer, including auto compensating type three-phase main circuit unit, compensation control unit, trigger unit, protection driving unit；Compensation control unit differentiates that the compensation control circuit of circuit forms including sampling comparison circuit, delay protection circuit, triggering gating configuration circuit, error detection by three; respectively to three-phase phase voltage carry out voltage sample, export three-phase Trig control signal, trigger region control signal, triggering gating controlling value differentiate signal；Whether protection driving unit is effectively protected the three-phase thyristor switching group in main circuit according to the triggering gating controlling value differentiation signal of the three-phase of input.The AC voltage regulator can adjust the number of partitions of input ac power phase voltage fluctuation range voltage, change the mode and compensation precision of compensation；While realizing mutual lock control, also thyristor switch group is protected to whether control circuit logic error occurs, effectively strengthens the protection for course of work exception.

Description

Three-phase ac voltage stabilizer

Technical field

The present invention relates to power technique fields, especially a kind of three-phase ac voltage stabilizer.

Background technique

Existing compensation single-phase and three-phase AC voltage stabilizer, its advantage is that voltage stabilized range is wide, waveform almost without distortion, Overall efficiency is high, and workload-adaptability is strong.Its principle is the height situation according to input voltage, is automatically controlled on compensator transformer just The switching of the different winding coils of grade winding, using the no-load voltage ratio relationship of primary side Working winding and secondary windings, or passes through tune The alive mode of institute, provides the voltage compensation of two-way multi gear, to realize the purpose of voltage-regulation voltage-stabilization on whole armature 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 compensation type ac voltage stabilizer, the present invention provides a kind of three-phase alternating current pressure stabilizings Device, including auto compensating type three-phase main circuit unit, compensation control unit, trigger unit, protection driving unit.Autocompensation It include compensator transformer, auto-transformer, thyristor switch group, relay in every phase main circuit of formula three-phase main circuit unit Protect circuit；It compensates control unit and exports three-phase Trig control signal to trigger unit；Trigger unit is according to the triggering control of input Signal processed issues trigger signal to auto compensating type three-phase main circuit unit, controls thyristor in three-phase thyristor switching group On-off；Compensation control unit exports three-phase simultaneously, and trigger region does not control signal and three-phase triggering gating controlling value differentiates signal to guarantor Driving unit is protected, protection driving unit differentiates whether signal effectively starts/stop according to the three-phase triggering gating controlling value of input Only to the protection of three-phase thyristor switching group, at the same according to three-phase trigger gating controlling value differentiate signal whether effectively and three-phase not Trigger region control signal whether the power supply effectively to control trigger unit.

The compensation control unit is made of the identical compensation control circuit of three structures；Three compensation control circuit difference Voltage sample is carried out to three-phase alternating-current supply phase voltage, trigger region does not control signal, three for output three-phase Trig control signal, three-phase Mutually triggering gating controlling value differentiates signal.

The compensation control circuit of each phase include sampling comparison circuit, delay protection circuit, triggering gating configuration circuit, Error detection differentiates circuit, and the delay protection circuit function of each phase is identical as structure, the sampling comparison circuit function and knot of each phase Structure is identical, and the triggering gating configuration circuit function of each phase is identical as structure, and the error detection of each phase differentiates circuit function and structure It is identical.In each phase compensation control circuit, sampling comparison circuit carries out voltage sample, output triggering choosing to AC power source phase voltage Logical controlling value is simultaneously sent to delay protection circuit；Trigger region control signal and the triggering after delay do not gate for delay protection circuit output Controlling value；Triggering gating controlling value after delay is sent to triggering gating configuration circuit and error detection differentiates circuit；Triggering gating is matched Circuits export Trig control signal；Error detection differentiates that the triggering after circuit input delay gates controlling value and differentiates whether it has Effect, output triggering gating controlling value differentiate signal.

The triggering gating controlling value of each phase is M binary values；In each phase compensation control circuit, error detection differentiates circuit Differentiate whether the triggering gating controlling value of input is effective according to being, in the position the M binary value of triggering gating controlling value, has and only Have one it is effective when, triggering gating controlling value it is effective；Otherwise, triggering gating controlling value is invalid.Position in triggering gating controlling value It effectively for 1, is 0 invalid, i.e., the high level in triggering gating control value signal is effective, and low level is invalid；Either, triggering gating Position in controlling value be 1 invalid, i.e., the low level in triggering gating control value signal is effective, and high level is invalid 0 effectively；Altogether There is M triggering gating controlling value effective.

In each phase, sampling comparison circuit includes voltage comparator electricity between AC power source phase voltage sample circuit and multi-region AC power source phase voltage RMS-DC converter is AC power source phase voltage sampled value by road, AC power source phase voltage sample circuit.

In each phase, voltage comparator circuit includes m-1 comparator between multi-region, and input voltage is different from m-1 Threshold voltage is compared, and exports m bit comparison output valve；M-1 comparator is all made of original power supply power supply.M-1 different Threshold voltage is respectively connected to the inverting input terminal of m-1 comparator, and input voltage is connected to the same phase of m-1 comparator simultaneously Input terminal；The m bit comparison output valve high level that voltage comparator exports between multi-region is effective, has in m bit comparison output valve and only has One output valve is effective；In m-1 comparator, the highest comparator of threshold voltage directlys adopt positive single supply and is powered, His comparator is all made of controllable electric power and is powered；When comparator is powered using controllable electric power, only in all threshold voltage ratios Its high comparator all output low level when, controllable electric power is powered to its positive power source terminal, otherwise controllable electric power stop to Its positive power source terminal is powered；Comparator is powered using controllable electric power and controllable electric power stops being powered to its positive power source terminal When, export low level；M bit comparison output valve is made of the output valve and minimum section judgment value of m-1 comparator；When m-1 When all low level of the output valve of comparator, minimum section judgment value is high level, and otherwise, minimum section judgment value is low electricity It is flat.

In each phase, the voltage of AC power source phase voltage waving interval range is adjusted to M voltage class section, is passed through The parameter of adjustment sampling comparison circuit is realized；Further, it is realized by adjusting the parameter of voltage comparator circuit between multi-region.Often In one phase, voltage comparator circuit further includes by upper limit threshold potentiometer, lower threshold potentiometer, multiple intermediate partial pressures between multi-region The multi-Vt output circuit of resistance composition provides m-1 different threshold voltages to m-1 comparator；Adjust upper limit threshold It is worth the parameter value of potentiometer and lower threshold potentiometer, the voltage of AC power source phase voltage waving interval range can be adjusted to M effective M triggerings of M voltage class section, M voltage class section and sampling comparison circuit output gate controlling value It corresponds；M triggerings gating controlling values are made of low M in m bit comparison output valve, i.e. M triggering gate controlling value by The output of M-1 minimum comparator of threshold voltage and minimum section judgment value form in voltage comparator circuit between multi-region；M-1 A minimum threshold voltage is respectively the voltage sample value for separating the AC power source phase voltage value in M voltage class section.The m It is more than or equal to 2 more than or equal to 3, M and is less than or equal to m.

When comparator is powered using controllable electric power, output is terminated with pull down resistor, only higher than its in all threshold voltages Comparator all output low level when, controllable electric power is powered to its positive power source terminal, and otherwise controllable electric power stops to it just Power end is powered.Using nor gate realize comparator controllable electric power function of supplying power, the positive power source terminal of comparator be connected to or The output end of NOT gate, the input terminal of nor gate are respectively connected to the output end of all threshold voltages comparator higher than its.

Comparator between multi-region in voltage comparator circuit is preferably using the rail-to-rail amplifier of low-power consumption of single supply power supply.

In each phase, the on-off assembled state of thyristor in triggering gating controlling value control thyristor switch group；Thyristor 0 or 1 in switching group in the multiple output voltages of on-off assembled state control selections this phase auto-transformer of thyristor A or multiple voltage superpositions are realized corresponding with voltage class section as the magnet exciting coil voltage of this phase compensator transformer Voltage compensation state；The corresponding voltage compensation state in each voltage class section of AC power source phase voltage.In each phase, Triggering gating configuration circuit includes diode triggered configuring matrix；Triggering gating configuration circuit is according to effective triggering gating control Value, is selected by diode triggered configuring matrix and keeps corresponding Trig control signal effective, controls the main electricity of auto compensating type three-phase On-off assembled state of the road unit with thyristor in phase thyristor switch group.

In each phase, N number of thyristor is shared in thyristor switch group；Diode triggered configuring matrix includes the triggering control of m root Line processed, N root triggering driving alignment；N root triggering driving alignment and N number of thyristor correspond, and a triggering driving alignment has Effect correspondence keeps the Trig control signal of a thyristor effective；In the friendship of every triggering control line and every triggering driving alignment Vent sets the configuration branch for being respectively provided with and being composed in series by diode and configuration switch, and configuration switch can be connected on the yin of diode Extremely, or it is connected on the anode tap of diode；When triggering control line signal is that low level is effective, two poles of branch are configured Tube cathode side is connected on triggering control line, and anode-side is connected on triggering driving alignment；Triggering control line signal is height When level is effective, the diode anode side for configuring branch is connected on triggering control line, and cathode side is connected to triggering driving column On line；The N is the integer more than or equal to 4.

In each phase, configuring and configuring the configuration method of switch in branch is to trigger in control line in m root, selection is wherein M root be triggering gating control line；M root triggering gating control line is corresponded with M triggering gating controlling values, and one has The corresponding triggering gating control line of the triggering gating controlling value of effect is effective；It is right when every triggering gating control line is effective Answer the on-off assembled state of thyristor in a thyristor switch group；When every triggering gating control line is had line effect with this It is to connect that corresponding on-off assembled state, which needs the configuration switchgear distribution between the triggering driving alignment of conducting thyristor in configuration branch, Logical state；By every triggering gating control line and the touching for thering is corresponding on-off assembled state when line effect to need cutoff thyristor The configuration switchgear distribution configured in branch between hair driving alignment is off-state.

In each phase, a triggering driving alignment signal effectively correspondence keeps the Trig control signal of a thyristor effective Method is that N root triggering driving alignment signal corresponds the Trig control signal directly as N number of thyristor；A piece triggering is driven Dynamic alignment signal effectively correspondence makes the effective method of the Trig control signal of a thyristor either, the triggering gating configuration Circuit further includes Trig control signal driving circuit；The input of Trig control signal driving circuit is N root triggering driving alignment Signal exports as the Trig control signal of one-to-one N number of thyristor.

In each phase, so that voltage class section is changed when AC power source phase voltage fluctuates, leads to triggering gating control Value changes, when needing to switch the on-off assembled state of thyristor in thyristor switch group, the thyristor in thyristor switch group Between successive 2 kinds of different on-off assembled states, not trigger region time is maintained, all crystalline substances in thyristor switch group are turned off Brake tube.The trigger region time is not realized by not trigger region control signal for maintenance one；Trigger region control signal is not selected in triggering for control Logical controlling value exports a pulse after changing；Trigger region control signal is not effective during exporting pulse, non-defeated It is invalid during pulse out.Further, after the triggering gating controlling value changes, trigger region does not control simple venation in signal The spaced time of punching is chosen in 10ms between 30ms.

In each phase, in delay protection circuit, the triggering gating control value signal change moment of delay is later than triggering gating Controlling value change after not trigger region control signal in pulse the forward position moment, and earlier than triggering gating controlling value change After change not trigger region control signal in pulse it is rear along the moment.

Protection driving unit differentiates whether signal effectively starts/stop pair according to the three-phase triggering gating controlling value of input The specific method of the protection of three-phase thyristor switching group is to differentiate in signal there is one and one when three-phase triggers gating controlling value When above invalid, control disconnects the input side supply voltage of all auto-transformers in three-phase to make at three-phase thyristor switching group Under guard mode.Three-phase thyristor switching group is under guard mode, and three-phase triggering gating controlling value differentiates that signal is all extensive When being again effective, protection driving unit is automatically stopped the guard mode of three-phase thyristor switching group.

Protect driving unit according to three-phase triggering gating controlling value differentiate signal whether effectively and three-phase not trigger region control Whether the specific method effectively to control the power supply of trigger unit is signal, differentiates signal when three-phase triggers gating controlling value In have one and more than one it is invalid when, control break trigger unit in three-phase trigger circuit power supply；It is gated when three-phase triggers When controlling value differentiates that signal is all effective, in each phase, trigger region control signal is not effectively then in break trigger unit the same as touching Otherwise the power supply of Power Generation Road connects the power supply in trigger unit with phase trigger circuit, work normally with phase trigger circuit, foundation The Trig control signal of input issues trigger pulse.

Thyristor in three-phase thyristor switching group is bidirectional thyristor or 2 unidirectional thyristor reverse parallel connection shapes At thyristor alternating-current switch.

The beneficial effects of the present invention are: the number of partitions of input ac power phase voltage fluctuation range voltage can be adjusted, Change the mode and compensation precision of compensation；Different subregions is adapted to using different configurations are carried out to diode triggered configuring matrix Quantity and compensation way；Existed using the three-phase ac voltage stabilizer that compensator transformer group and thyristor switch group carry out voltage compensation Guarantee that ipsilateral thyristor does not simultaneously turn in every phase thyristor switch group, realizes thyristor using diode triggered configuring matrix While mutual lock control, also to being likely to occur, sampling comparison circuit appearance is wrong to output the invalid feelings for triggering gating controlling value Condition stops issuing trigger pulse and carries out the protection of three-phase thyristor switching group, effectively strengthens the three-phase alternating current pressure stabilizing Device is directed to the protection of course of work exception；When three-phase thyristor switching group is in guard mode, if three-phase triggers Gating controlling value full recovery be it is effective, then can be automatically stopped the guard mode of three-phase thyristor switching group and locate it again In compensation work state.Three-phase ac voltage stabilizer does not use the switching of the program mode (PM) control thyristor of single-chip microcontroller, PLC etc. Switching, avoids voltage-stablizer failure caused by the problems such as program runs fast, crashes.Above-mentioned function makes the three-phase ac voltage stabilizer Work it is more stable, reliable.

Detailed description of the invention

Fig. 1 is the system composition block diagram of three-phase ac voltage stabilizer；

Fig. 2 is the composition block diagram of A phase compensation control circuit；

Fig. 3 is the A phase main circuit in auto compensating type three-phase main circuit unit embodiment 1；

Fig. 4 is the A phase main circuit in auto compensating type three-phase main circuit unit embodiment 2；

Fig. 5 is that comparison circuit embodiment 1 is sampled in A phase compensation control circuit；

Fig. 6 is that comparison circuit embodiment 2 is sampled in A phase compensation control circuit；

Fig. 7 is that A phase delay protects circuit embodiments block diagram；

Fig. 8 is the delay detection circuit embodiment 1 for triggering gating control value signal Y11 in delay detection module for A phase；

Fig. 9 is the delay detection circuit embodiment 2 for triggering gating control value signal Y11 in delay detection module for A phase；

Figure 10 is the delay detection circuit embodiment for triggering gating control value signal Y11 in delay detection module for A phase 3；

Figure 11 is that trigger region does not control signal generator module embodiment to A phase；

Figure 12 is that A phase delay protects split-phase in the middle part of circuit to close waveform diagram；

Figure 13 is the trigger circuit embodiment that bidirectional thyristor SR1 in A phase main circuit is triggered in trigger unit；

Figure 14 is that A phase triggers gating control cells embodiment 1；

Figure 15 is that A phase triggers gating control cells embodiment 2；

Figure 16 is that the error detection of A phase differentiates circuit embodiments 1；

Figure 17 is that the error detection of A phase differentiates circuit embodiments 2；

Figure 18 is protection drive unit embodiment.

Specific embodiment

Below in conjunction with attached drawing, the invention will be further described.

Fig. 1 is the system composition block diagram of three-phase ac voltage stabilizer, and compensation control unit exports three-phase Trig control signal P5 is made of A phase, B phase, C phase Trig control signal P5A, P5B, P5C to trigger unit, three-phase Trig control signal P5；Triggering Unit issues trigger signal P6 to auto compensating type three-phase main circuit unit, control according to the three-phase Trig control signal of input A, in B, C three-phase main circuit thyristor switch group bidirectional thyristor on-off.Compensation control unit exports three-phase simultaneously and does not trigger Area control signal P4 and three-phase triggering gating controlling value differentiate signal P7 to driving unit is protected, and trigger region does not control signal to three-phase P4 includes A phase, B phase, C phase not trigger region control signal P4A, P4B, P4C, and three-phase triggering gating controlling value differentiates that signal P7 includes A phase, B phase, C phase A phase triggers gating controlling value and differentiates signal P7A, P7B, P7C；Protection driving unit is touched according to the three of input Hair gating controlling value differentiates whether signal effectively starts/stop the protection to three-phase thyristor switching group, while according to three-phase Triggering gating controlling value differentiate signal whether effectively and three-phase trigger region does not control whether signal effectively controls trigger unit Power supply.

Compensation control unit is made of the compensation control circuit of A, B, C three-phase, and Fig. 2 is the composition of A phase compensation control circuit Block diagram, sampling comparison circuit carry out voltage sample to A phase AC power source phase voltage, and output A phase triggers gating controlling value P2A；Prolong When protection circuit input A phase trigger gating controlling value P2A, output delay after A phase trigger gating controlling value P3A and A phase do not touch It sends out area and controls signal P4A；A phase after triggering gating configuration circuit input delay triggers gating controlling value P3A, and output A phase triggers Control signal P5A；Error detection differentiates that circuit differentiates that the A phase of input triggers whether gating controlling value P3A is effective, and output A phase triggers choosing Logical controlling value differentiates signal P7A.B phase, the structure of C phase compensation control circuit, function, control logic are identical as A phase, respectively to B Phase AC power source phase voltage, C phase AC power source phase voltage carry out voltage sample and control, export B phase, C phase Trig control signal P5B, P5C, trigger region does not control signal P4B, P4C and B phase, C phase A phase triggers gating controlling value differentiation signal P7B for B phase, C phase, P7C。

Fig. 3 be auto compensating type three-phase main circuit unit embodiment 1 in A phase main circuit, including compensator transformer TB1 and Auto-transformer TB2,6 bidirectional thyristor SR1-SR6 collectively constitute A phase thyristor switch group, and fuse FU1 and relay are normal Switch KA-1, relay normally closed switch KA-2 form A phase relay and protect circuit.

In Fig. 3, the bucking coil of compensator transformer TB1 is connected in A phase phase line, and phase line input terminal is L1A, and output end is L2A.Voltage on TB1 magnet exciting coil is controlled by A phase thyristor switch group.Auto-transformer TB2 have 3 output tap C1, C2, One end of TB1 magnet exciting coil is connected to after one end of C3, bidirectional thyristor SR1, SR3, SR5 are in parallel, SR1, SR3, SR5 are in addition One end is respectively connected to tap C1, C2, C3；TB1 magnet exciting coil is connected to after one end of bidirectional thyristor SR2, SR4, SR6 are in parallel Other end, the other end of SR2, SR4, SR6 is then respectively connected to tap C1, C2, C3.If auto-transformer TB2 tap Output voltage U12 between C1, C2 is different from the output voltage U23 between C2, C3, and voltage U23 is 2 times of voltage U12；Then thyristor Switching group is up to forward direction U12, forward direction U23, forward direction U12+U23, reversed U12, reversed U23, reversed U12+U23 totally 6 kinds of excitations Coil voltage compensation way, 0 voltage compensation mode when a kind of additional input voltage is within normal range (NR), the input of A phase phase line The AC power source phase voltage of end L1A input can at most be divided into 7 voltage ranges and compensate control.In Fig. 3, N is zero curve, G11, G12 are respectively the trigger signal input terminal of bidirectional thyristor SR1 to SR6 to G61, G62.In Fig. 3, bidirectional thyristor SR1, SR3, SR5 form ipsilateral thyristor, and bidirectional thyristor SR2, SR4, SR6 form another ipsilateral thyristor；It is ipsilateral to avoid short circuit There cannot be 2 and 2 or more thyristors to simultaneously turn on simultaneously in thyristor；For example, SR1, SR3 cannot be simultaneously turned on, SR4, SR6 cannot be simultaneously turned on, etc..

Fig. 4 be auto compensating type three-phase main circuit unit embodiment 2 in A phase main circuit, including compensator transformer TB1 and Auto-transformer TB2,8 bidirectional thyristor SR1-SR8 collectively constitute A phase thyristor switch group, and fuse FU1 and relay are normal Switch KA-1, relay normally closed switch KA-2 form A phase relay and protect circuit.

In Fig. 4, the bucking coil of compensator transformer TB1 is connected in A phase phase line, and phase line input terminal is L1A, and output end is L2A.Voltage on TB1 magnet exciting coil is controlled by thyristor switch group.Auto-transformer TB2 have 4 output tap C1, C2, C3, Be connected to one end of TB1 magnet exciting coil after one end of C4, bidirectional thyristor SR1, SR3, SR5, SR7 is in parallel, SR1, SR3, SR5, The other end of SR7 is respectively connected to tap C1, C2, C3, C4；After one end of bidirectional thyristor SR2, SR4, SR6, SR8 are in parallel Be connected 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, between C3, C4 Output voltage U34 is respectively different, and voltage U23 is 3 times of voltage U12, and voltage U34 is 2 times of voltage U12；Then thyristor switch Group include forward direction U12, forward direction U23, forward direction U34, forward direction U12+U23, forward direction U23+U34, forward direction U12+U23+U34, reversely U12, reversed U23, reversed U34, reversed U12+U23, reversed U23+U34, reversed U12+U23+U34 totally 12 kinds of magnet exciting coil voltage Compensation way, 0 voltage compensation mode when a kind of additional input voltage is within normal range (NR), the A of phase line input terminal L1A input Phase AC power source phase voltage can be divided into most 13 voltage ranges and compensate control.In Fig. 4, N is zero curve, G11, G12 It is respectively the trigger signal input terminal of bidirectional thyristor SR1 to SR8 to G81, G82.In Fig. 4, bidirectional thyristor SR1, SR3, SR5, SR7 form ipsilateral thyristor, and bidirectional thyristor SR2, SR4, SR6, SR8 form another ipsilateral thyristor；To avoid short circuit, There cannot be 2 and 2 or more thyristors to simultaneously turn on simultaneously in ipsilateral thyristor；For example, SR1, SR7 cannot be simultaneously turned on, SR4, SR8 cannot be simultaneously turned on, etc..

Each bidirectional thyristor in Fig. 3, Fig. 4 can be substituted with the unidirectional thyristor of 2 reverse parallel connections.Fig. 3, Fig. 4 In, relay normally open switch and relay normally closed switch composition relay protection switch.

Auto compensating type three-phase main circuit unit is three-phase four-line system, and the main circuit of A, B, C three-phase is using identical Circuit structure and form respectively compensate the phase voltage of A, B, C phase, i.e., B, C two-phase use with A phase main circuit identical electricity Line structure and compensation way respectively compensate the phase voltage of B, C phase.

The voltage of A phase AC power source phase voltage waving interval range is adjusted to M voltage class section, A phase samples ratio Voltage sample is carried out to A phase AC power source phase voltage compared with circuit and obtains A phase AC power source phase voltage sampled value, by M or M-1 A comparator is compared A phase AC power source phase voltage sampled value, and the A phase that output M-bit binary number is constituted triggers gating control Value processed；When A phase AC power source phase voltage is in one in M voltage class section, M A phases are triggered in gating controlling value Corresponding one effectively, other positions are invalid.The significance bit that M A phases trigger gating controlling value is high level, i.e. binary one；In vain Position is low level, i.e. Binary Zero；Either, it is low level, i.e. Binary Zero that M A phases, which trigger the significance bit of gating controlling value,；Nothing Effect position is high level, i.e. binary one.

Fig. 5 is that comparison circuit embodiment 1 is sampled in A phase compensation control circuit, and m is equal to 7, for auto compensating type three-phase master Circuit unit embodiment 1 compensates control.In AC power source phase voltage sample circuit, from the friendship of phase line L1A and zero curve N input Galvanic electricity source phase voltage is rectified after transformer TV decompression by the rectifier bridge that diode DV1-DV4 is formed, then is filtered through capacitor CV1 It divides, obtains mutually electric with the AC power source of the AC power source phase voltage virtual value direct proportionality of input with resistance RV1, RV2 Press sampled value U1.

Between the multi-region of Fig. 5 in voltage comparator circuit, upper limit threshold potentiometer RPH, lower threshold potentiometer RPL, centre Divider resistance RF2-RF6 forms bleeder circuit, and after power supply+VCC1 partial pressure, 6 obtained threshold voltage UF2-UF7 are and divide The intermediate dividing voltage value of 6 of the corresponding voltage sample value of AC power source phase voltage value every 7 voltage class sections.6 AC power source phase voltage sampled value U1 is compared with 6 threshold voltage UF2-UF7 for comparator FA2-FA7 realization, voltage between multi-region Output Y12-Y17 and minimum section judgment value Y11 group of the 7 bit comparison output valves of comparator circuit by 6 comparator FA2-FA7 At the voltage of AC power source phase voltage waving interval range is at most divided into 7 voltage class section 1-7.AC power source is mutually electric Pressure sampled value U1 is sent to the non-inverting input terminal of comparator FA2-FA7 simultaneously；6 threshold voltage UF2-UF7 are sent respectively to comparing The inverting input terminal of device FA2-FA7.In Fig. 5, power supply+VCC1, bleeder circuit pair can also be replaced with other precision voltage sources Precision voltage source is divided, and threshold voltage can be made more accurate.Comparator FA2-FA7 is preferably powered using low-power consumption single supply Rail-to-rail amplifier, for example, selection OPA317, AD8517, MCP6291, TLV2450, TLV2451, TLV2460, TLV2461 etc. Quiescent operation source current is less than the rail-to-rail amplifier of single channel of 1mA.

In Fig. 5, nor gate FH2-FH6 forms the controllable power supply of comparator FA2-FA6, i.e. comparator FA2-FA6's The power supply control by output Y13-Y17 respectively；Resistance RB2-RB6 is respectively the pull down resistor for exporting Y12-Y16, works as phase The power supply for answering comparator is to draw level for low level when output is high-impedance state close to 0V.The power supply of comparator FA7 Power supply is connected to power supply+VCC1, is in normal operating conditions, and output Y17 controls the power supply of comparator FA2-FA6 simultaneously.Example Such as, when the AC power source phase voltage of input is high, when one voltage class section 7 of highest in 7 voltage class sections, Y17 High level is exported, all output is low level to nor gate FH2-FH6, and the single supply power supply of comparator FA2-FA6 is all Close to 0V, output is close to 0V either high-impedance state, and resistance RB2-RB6 respectively draws output Y12-Y16 for low level.When defeated For the AC power source phase voltage entered not at one voltage class section 7 of highest in 7 voltage class sections, Y17 exports low level, Nor gate FH6 exports high level and provides power supply to comparator FA6, at this point, if the AC power source phase voltage of input is in When voltage class section 6, Y16 exports high level, and all output is low level, the list of comparator FA2-FA5 to nor gate FH2-FH5 Power supply power supply power supply is all close to 0V, and output is that will export Y12- respectively close to 0V either high-impedance state, resistance RB2-RB5 It is low level that Y15, which is drawn,.When the AC power source phase voltage of input is lower than voltage class section 6, Y17, Y16 export low level, Nor gate FH6, FH5 export high level, provide power supply to comparator FA6, FA5 respectively, at this point, if the exchange of input When power supply phase voltage is in voltage class section 5, Y15 exports high level, and all output is low level to nor gate FH2-FH4, than Single supply power supply compared with device FA2-FA4 is all close to 0V, and output is close to 0V either high-impedance state, resistance RB2- RB4 respectively draws output Y12-Y14 for low level.The rest may be inferred, when the AC power source phase voltage of input is in voltage class area Between 4 when, Y14 export high level, other output be low level；When the AC power source phase voltage of input is in voltage class section 3 When, Y13 exports high level, other outputs are low level；When the AC power source phase voltage of input is in voltage class section 2, Y12 exports high level, other outputs are low level；Only when the AC power source phase voltage of input is in either lower than voltage etc. When grade section 1, all low levels of output Y12-Y17 of comparator FA2-FA7 sentence the minimum section of the output of nor gate FH1 Disconnected value Y11 is high level.When nor gate FH1-FH6 selects 74HC series of high speed CMOS gate circuit, for example, 8 input or non-of selection Door 74HC4078, three tunnels 3 input nor gate 74HC27, four tunnels 2 input nor gate 74HC02 etc. or 74HC series of high speed When CMOS or door add NOT gate to realize nor gate function, since the high level driving current of 74HC series of high speed CMOS can reach 4mA, the rail-to-rail amplifier of single channel for driving quiescent operation source current to be less than 1mA enough.The power supply of nor gate FH1-FH6 For power supply+VCC1.

If the AC power source phase voltage fluctuation range of input is 220V ± 10%, it is desirable that stablized in 220V ± 2% Output in range.Comparison circuit embodiment 1 is sampled using Fig. 5, input can be divided into area in 242V to the voltage between 198V Between voltage swing be 8V 7 voltage class sections, i.e. M is equal to 7, whole by Y11-Y17 included in 7 bit comparison output valves Composition triggering gating controlling value P2A；The voltage in 3 voltage class sections therein is higher than desired output voltage range, needs Carry out drop compensation；The voltage in 3 voltage class sections needs to carry out boosting compensation lower than desired output voltage range；1 Voltage class section carries out 0 voltage compensation, i.e. uncompensation within desired output voltage range.The voltage range of 8V is about 220V ± 1.82% meets requirement of the output control within 220V ± 2%；The corresponding reality in 7 voltage class sections of 8V AC power source phase voltage waving interval is 248V to 192V, covers the practical fluctuation range of input voltage.It is mended using Fig. 3 self coupling The A phase main circuit repaid in formula three-phase main circuit unit embodiment 1 compensates, then the input voltage of auto-transformer TB2 is to hand over 220V is flowed, when only making the magnet exciting coil voltage of TB1 of output voltage U12, TB1 offset voltage is 8V；Only made of output voltage U23 When the magnet exciting coil voltage of TB1, TB1 offset voltage is 16V；The magnet exciting coil electricity of TB1 is done using output voltage U12, U23 simultaneously When pressure, TB1 offset voltage is 24V.The selection of threshold voltage UF2-UF7 and AC power source phase voltage sampled value U1 and AC power source Ratio between phase voltage is related；If the ratio between AC power source phase voltage sampled value U1 and AC power source phase voltage is 0.01, i.e. AC power source phase voltage sampled value U1 are the 1% of AC power source phase voltage virtual value, and input is in 242V between 198V The corresponding voltage sample value range of voltage be 2.42V to 1.98V；It is 8V that AC power source phase voltage, which is divided into section voltage swing, 7 voltage class sections when, 6 threshold voltage UF7-UF2 be respectively 2.40V, 2.32V, 2.24V, 2.16V, 2.08V, 2.00V, for 6 centres point of voltage sample value corresponding with the AC power source phase voltage value in 7 voltage class sections is separated Every voltage value；Difference between 6 threshold voltages is identical, is 0.08V；Intermediate divider resistance RF2-RF6 selects identical electricity Resistance value adjusts the resistance value of upper limit threshold potentiometer RPH, lower threshold potentiometer RPL respectively, can be by 6 threshold voltages UF7-UF2 is adjusted to the numerical value of needs.In this example embodiment, when the AC power source phase voltage of input exceeds maximum voltage grade interval When range, output signal corresponding with maximum voltage grade interval is effective in the triggering gating controlling value of output, i.e. output is Y17 Effectively；Main circuit is in maximum voltage grade interval according to the AC power source phase voltage of input and carries out corresponding voltage step-down at this time Compensation.When the AC power source phase voltage of input be lower than minimum voltage levels interval range when, Y11 output effectively, main circuit according to The AC power source phase voltage of input is in minimum voltage levels section and carries out corresponding boost in voltage compensation.

If the AC power source phase voltage fluctuation range of input is 220V ± 10%, only requires and stablized in 220V ± 4% In the range of when exporting, it is possible to reduce the quantity of voltage range avoids frequent progress from adjusting.It is real using Fig. 5 sampling comparison circuit Example 1 is applied, input is divided into 3 voltage class sections that section voltage swing is 16V, i.e. M in 242V to the voltage between 198V Equal to 3；The voltage in 1 voltage class section therein is higher than desired output voltage range, needs to carry out drop compensation；1 The voltage in voltage class section needs to carry out boosting compensation lower than desired output voltage range；It is wanting in 1 voltage class section Within the output voltage range asked, 0 voltage compensation, i.e. uncompensation are carried out.The voltage range of 16V is about 220V ± 3.64%, Meet requirement of the output control within 220V ± 4%；The corresponding practical AC supply voltage in 3 voltage class sections of 16V Waving interval is 244V to 196V, covers the practical fluctuation range of input voltage.Fig. 3 auto compensating type three-phase master is used at this time A phase main circuit in circuit unit embodiment 1 compensates, then the input voltage of auto-transformer TB2 is alternating current 220V, only uses Output voltage U23 does the magnet exciting coil voltage of TB1, and TB1 offset voltage is 16V.Select minimum section judgment value Y11, comparator The output Y12-Y13 composition triggering gating controlling value P2A of FA2-FA3.The selection of threshold voltage UF2-UF3 is mutually electric with AC power source Press the ratio between sampled value U1 and AC power source phase voltage related；If AC power source phase voltage sampled value U1 and AC power source phase Ratio between voltage is 0.01, input 242V to the corresponding voltage sample value range of voltage between 198V be 2.42V extremely 1.98V；When AC power source phase voltage is divided into 3 voltage class sections that section voltage swing is 16V, 2 threshold voltages UF3-UF2 is respectively 2.28V, 2.12V, for electricity corresponding with the AC power source phase voltage value in 3 voltage class sections is separated Press 2 intermediate dividing voltage values of sampled value；The resistance of upper limit threshold potentiometer RPH, lower threshold potentiometer RPL are adjusted respectively 2 threshold voltage UF3-UF2, can be adjusted to the numerical value of needs by value.At this point, comparator FA4-FA7 is worked at the same time, but FA4- The threshold voltage of FA7 is respectively 2.44V, 2.60V, 2.76V, 2.92V, and the AC power source phase voltage only inputted is more than 244V When, effective high level can be exported in comparator FA4-FA7；Since the AC power source phase voltage of input is in 242V to 198V Between, therefore, effective high level can not be exported in the output of comparator FA4-FA7 in Y14-Y17, at this time by 7 bit comparisons Included Y11-Y13 composition triggering gating controlling value P2A in output valve.

Since the compensation way of auto compensating type three-phase main circuit unit embodiment 1 has Schmidt's characteristic automatically, compare Device FA2 to comparator FA7 does not form Schmidt's comparator.The triggering gating controlling value high level of Fig. 5 output is effective；Comparing The output end of device FA2-FA7 increases level-one phase inverter, while nor gate FH1 is changed to or door, then the triggering gating control exported It is effective that value becomes low level.

The embodiment 1 of Fig. 5 can also be carried out for auto compensating type three-phase main circuit unit embodiment 2, at this time, it may be necessary to will The voltage of AC power source phase voltage waving interval range is divided into more voltage class sections.For example, by AC power source phase voltage When the voltage of waving interval range is divided into 13 voltage class sections, the circuit of Fig. 5 should extend to 12 comparators, with 12 Threshold voltage of different sizes is compared；The triggering gating controlling value P2A of output will be at most by 13, for example, Y11-Y113 Composition.

Fig. 6 is that comparison circuit embodiment 2 is sampled in A phase compensation control circuit, and m is equal to 10, for auto compensating type three-phase Main circuit unit embodiment 2 compensates control.In Fig. 6, FD1 is that real available value detects device LTC1966, LTC1966 and change Depressor TV1, capacitor CV2, capacitor CV3 constitute AC power source phase voltage sample circuit, the friendship to inputting from phase line L1A and zero curve N Galvanic electricity source phase voltage measures, and obtains AC power source phase voltage sampled value U2.UIN1, UIN2 of LTC1966 is alternating voltage Differential input end, USS are the negative supply input terminal that can be grounded, and UDD is positive power input, and GND is ground terminal, and EN is low level Effectively enabled control signal, UOUT are voltage output end, and COM is output voltage return terminal.

In Fig. 6, FD2, RD1, RD2 form voltage comparator circuit between multi-region；FD2 is 10 grades and compares display driver LM3914, the internal voltage divider circuit that inside is together in series containing 10 1k Ω precision resistances form 10 comparative threshold voltages and divide It is not connected to the positive input terminal of internal 10 comparators, the voltage of AC power source phase voltage waving interval range is at most divided into 10 A voltage class section 1-10.6 feet are that internal voltage divider circuit is high-end, are connected to power supply+VCC1 through upper limit threshold potentiometer RD1；4 Foot is internal voltage divider circuit low side, is connected to the ground through lower threshold potentiometer RD2；8 feet are internal standard power supply low side, are 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, connection To AC power source phase voltage sampled value U2, it is connected internally to the negative input end of 10 comparators；The signal that 10-18 foot, 1 foot export Y110 to Y11 is with the output of 10 comparators as a result, wherein Y110 comparative threshold voltage highest, successively reduces, Y11 compares threshold Threshold voltage is minimum；The equal low level of Y1 to Y110 is effective, forms 10 low levels and effectively compares output valve；The scheme control of 9 feet End is hanging, realizes the dotted output of Y11 to Y110, i.e. Y11 only has single low level output effective into Y110；When the friendship of input When galvanic electricity source phase voltage is in voltage class section 10, Y110 exports low level, other outputs are high level；When the exchange of input When power supply phase voltage is in voltage class section 9, Y19 exports low level, other outputs are high level；When the AC power source of input When phase voltage is in voltage class section 5, Y15 exports low level, other export a height of level；When the AC power source of input is mutually electric When pressure is in voltage class section 1, Y11 exports low level, other export a height of level.

If the AC power source phase voltage fluctuation range of input is 220V+10% to 220V-20%, it is desirable that stablized It is exported in the range of 220V ± 2%.Using the sampling comparison circuit embodiment 2 of Fig. 6, will input in 242V to the electricity between 176V Pressure is divided into 10 voltage class sections that section voltage swing is 7V, i.e. M is equal to 10, by included in 10 bit comparison output valves Y11-Y110 integrally forms triggering gating controlling value P2A；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 6 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.7V's Voltage range is 220V ± 1.6%, meets requirement of the output control within 220V ± 2%, 10 voltage class sections of 7V Corresponding practical AC power source phase voltage waving interval is 244.5V to 174.5V, covers the actual range of voltage fluctuation.It adopts It is compensated with the A phase main circuit in Fig. 4 auto compensating type three-phase main circuit unit embodiment 2, then auto-transformer TB2's is defeated Entering 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；Only with defeated When voltage U23 does the magnet exciting coil voltage of TB1 out, TB1 offset voltage is 21V；The excitation wire of TB1 is only made of output voltage U34 When enclosing voltage, TB1 offset voltage is 14V；When doing the magnet exciting coil voltage of TB1 using output voltage U12, U23 simultaneously, TB1 is mended Repaying voltage is 28V；Etc..Between the selection and AC power source phase voltage sampled value U2 and AC power source phase voltage of threshold voltage Ratio is related；If the ratio between AC power source phase voltage sampled value U2 and AC power source phase voltage is 0.005, i.e. AC power source Phase voltage sampled value U2 is the 0.5% of AC power source phase voltage virtual value, is inputted corresponding to the voltage between 176V in 242V Voltage sample value range is 1.21V to 0.88V；AC power source phase voltage is divided into 10 voltage class that section voltage swing is 7V When section, 10 threshold voltages be respectively 1.1875V, 1.1525V, 1.1175V, 1.0825V, 1.0475V, 1.0125V, 0.9775V, 0.9425V, 0.9075V, 0.8725V divide into 10 voltages with by 244.5V to 174.5V range of voltages respectively The voltage sample value of grade interval lower limit value is corresponding；The high-end voltage of internal voltage divider circuit is connected to highest comparator positive input terminal, Therefore 6 foot voltages are 1.1875V.The size of VREF (1.2V or 1.25V) is exported according to internal standard power supply, and 10 internal The size of precision resistance can be with by adjusting the resistance value size of upper limit threshold potentiometer RD1 and lower threshold potentiometer RD2 Obtain 10 threshold voltages.If it is required that the fluctuation range for improving the precision either input voltage of voltage compensation is bigger, it is desirable that When voltage class is divided into more voltage class sections by the sampling comparison circuit embodiment 2 of Fig. 6, for example, it is desired to will exchange When the voltage of power supply phase voltage waving interval range is divided into 15 voltage class sections, 2 LM3914 can be used and realize, by 2 Internal voltage divider circuit series connection in LM3914, forms 20 comparative threshold voltages, constitutes 20 grades of comparator circuits；It selects therein 13 grades are compared output, and the triggering gating controlling value P2A of output will be at most by 13, for example, Y11-Y113 is formed.

It is sampled in comparison circuit embodiment 2 in the A phase compensation control circuit of Fig. 6, when the AC power source phase voltage of input is high When crossing maximum voltage grade interval range, the triggering gating controlling value of output is output corresponding with maximum voltage grade interval letter Number effectively, i.e., output be Y110 it is effective, main circuit according to AC power source phase voltage be in maximum voltage grade interval carry out accordingly Voltage step-down compensation.When the AC power source phase voltage of input is lower than minimum voltage levels interval range, the triggering choosing of output All signals are invalid in logical controlling value, and main circuit is without voltage compensation at this time.

10 comparators inside LM3914 in 10 comparators have been used in Fig. 6, and AC power source phase voltage is compared into area It is divided into 10 voltage class sections.It can be only with 9 comparators in the comparator of the inside LM3914 10, by AC power source phase Voltage relatively divides into 10 voltage class sections；The comparative threshold voltage of 9 comparators is and separates 10 voltage class areas Between 9 of the corresponding voltage sample value of AC power source phase voltage value intermediate dividing voltage values；For example, the comparison of each comparator Threshold voltage does not change, and is used as Y11 without the 1 foot output of LM3914 in Fig. 6, Y11 selection is by triggering gating controlling value Y12-Y110 control generates, i.e., when Y12-Y110 is all invalid, keeps Y11 effective, otherwise, keep Y11 invalid；At this point, when input When AC power source phase voltage is in or exceeds maximum voltage grade interval range, the triggering gating controlling value of output has for Y110 Effect, main circuit are in maximum voltage grade interval according to AC power source phase voltage and carry out corresponding voltage step-down compensation；Work as input AC power source phase voltage when being at or below minimum voltage levels interval range, be Y11 output effectively, main circuit according to The AC power source phase voltage of input is in minimum voltage levels section and carries out corresponding boost in voltage compensation.

If the AC power source phase voltage fluctuation range of input is 220V ± 15%, it is desirable that stablized in 220V ± 3.5% In the range of export, the precision of voltage regulation require reduce, the quantity of voltage range can be reduced at this time, frequent progress is avoided to adjust.It adopts With the sampling comparison circuit embodiment 2 of Fig. 6, it is 14V that input, which is divided into section voltage swing in 253V to the voltage between 187V, 5 voltage class sections, i.e. M be equal to 5；The voltage in 2 voltage class sections therein is higher than desired output voltage range, It needs to carry out drop compensation；The voltage in 2 voltage class sections needs to carry out boosting benefit lower than desired output voltage range It repays；1 voltage class section carries out 0 voltage compensation, i.e. uncompensation within desired output voltage range.The voltage zone of 14V Between be less than 220V ± 3.2%, meet requirement of the output control within 220V ± 3.5%, 5 voltage class sections pair of 14V The practical AC power source phase voltage waving interval answered is 255V to 185V, covers the actual range of voltage fluctuation.Certainly using Fig. 4 A phase main circuit in the compensation three-phase main circuit unit embodiment 2 of coupling compensates, then the input voltage of auto-transformer TB2 For alternating current 220V, when only making the magnet exciting coil voltage of TB1 of output voltage U34, TB1 offset voltage is 14V；Simultaneously using output When voltage U12, U23 do the magnet exciting coil voltage of TB1, TB1 offset voltage is 28V.AC power source phase voltage sampled value U2 is to hand over The 0.5% of galvanic electricity source phase voltage virtual value, input are in 253V to the corresponding voltage sample value range of voltage between 187V 1.265V to 0.935V；When AC power source phase voltage is divided into 5 voltage class sections that section voltage swing is 14V, 5 threshold values Voltage is respectively 1.205V, 1.135V, 1.065V, 0.995V, 0.925V, the AC power source in respectively 5 voltage class sections The corresponding voltage sample value of phase voltage value lower limit value；Adjust the electricity of upper limit threshold potentiometer RD1 and lower threshold potentiometer RD2 Resistance value size makes the threshold voltage of 5 lower comparators of threshold voltage 5 threshold voltages, 15-18 inside LM3914 Foot, the output of 1 foot signal Y15 to Y1 be the output of 5 comparators as a result, wherein Y15 comparative threshold voltage highest, successively drops Low, Y11 comparative threshold voltage is minimum；The 10 equal low levels of bit comparison output valve are effective, at this time by being wrapped in 10 bit comparison output valves The Y11-Y15 composition triggering gating controlling value P2A included.At this point, the comparison threshold value that output is Y16 to Y110 comparator is more than or equal to For 1.275V, corresponding AC power source phase voltage value is 255V, exceeds actual input voltage range, therefore, the Y16 in Fig. 6 Effective low level can not be exported to Y110.

The sampling comparison circuit embodiment 2 of Fig. 6 can also be in auto compensating type three-phase main circuit unit embodiment 1 A phase main circuit compensates control, need to only divide into the voltage of the AC power source phase voltage waving interval range of input at this time No more than 7 voltage class sections select the comparison wherein no more than 7 grades to export.

The A phase of Fig. 6 samples comparison circuit embodiment 2 either for auto compensating type three-phase main circuit unit embodiment 1, or control is compensated to auto compensating type three-phase main circuit unit embodiment 2, B phase, C phase are all made of and A phase structure, function It can identical sampling comparison circuit.

It is real for auto compensating type three-phase main circuit unit in addition to the A phase of Fig. 5 or Fig. 6 samples comparison circuit embodiment It applies the either embodiment 2 of example 1 and compensates control, three-phase sampling comparison circuit is also an option that other AC power source phase voltages Sample circuit and comparison circuit realize function required by sampling comparison circuit.The output of Fig. 5 AC power source phase voltage sample circuit AC power source phase voltage sampled value U1, can send to voltage comparator circuit between the multi-region of Fig. 6 and be compared, output triggering choosing Logical controlling value；The AC supply voltage sampled value U2 of Fig. 6 AC supply voltage sample circuit output, can send to the multi-region of Fig. 5 Between voltage comparator circuit be compared, output triggering gating controlling value.

Fig. 7 is that A phase delay protects circuit embodiments block diagram, wherein delay detection module YC1 is respectively to including A phase M touchings The input signal Y 11-Y1m of hair gating controlling value Y11-Y1M carries out the signal Y21-Y2m after signal delay is postponed, wherein Y21-Y2M composition A phase retardation after triggering gate controlling value P3A；YC1 module simultaneously respectively to input signal Y 11-Y1m into Row Edge check obtains Edge check signal Y31-Y3m；Trigger region control signal generator module YC2 does not input Edge check signal Edge variation in M triggering gating controlling value Y11-Y1M is converted to not trigger region control signal P4A output by Y31-Y3m. In the embodiment block diagram of Fig. 7, the input of delay detection module YC1 is that A phase compensation control circuit samples comparison circuit implementation in Fig. 5 When the A phase that example 1 exports triggers gating controlling value, m is equal to 7.In the embodiment block diagram of Fig. 7, the input of delay detection module YC1 is When the A phase that A phase compensation control circuit sampling comparison circuit embodiment 2 exports in Fig. 6 triggers gating controlling value, m is equal to 10.B phase, C phase uses the identical delay protection circuit with A phase.

Fig. 8 is the delay detection circuit embodiment 1 that A phase input signal Y11 is directed in delay detection module.Resistance RY0, electricity Hold CY0, driving gate FY0 realize the signal delay of Y11 is obtained Y11 it is delayed after signal Y21.Resistance RY1, capacitor CY1, Diode DY1, phase inverter FY1 composition are directed to the rising edge detection circuit of input signal Y 11, the output signal YP1 of phase inverter FY1 In, the pulse of corresponding negative pulse form is exported after Y11 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 11, in the output signal YP2 of phase inverter FY3, The pulse of corresponding negative pulse form is exported after Y11 failing edge.NAND gate FY4 is accomplished that or logic (negative logic Under) function, when there is negative pulse generation in input signal Y P1, YP2, NAND gate FY4 output Edge check signal Y31 in produce Raw positive pulse, i.e., when input signal Y 11 changes, NAND gate FY4 exports the pulse of a positive pulse form.In Fig. 8, drive The device of dynamic door 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 that A phase input signal Y11 is directed in delay detection module.Phase inverter FY5, Resistance RY3, capacitor CY3 carry out reverse phase and delay to input signal Y 11, obtain the delayed inversion signal YP0 of Y11；Phase inverter FY6 again by YP0 reverse phase, obtain Y11 it is delayed after signal Y21.The signal of NAND gate FY7 input is that Y11 and Y11 is delayed The pulse of negative pulse form corresponding with Y11 rising edge is generated in inversion signal YP0, output signal YP1；Or door FY8 input Signal be the delayed inversion signal YP0 of Y11 and Y11, generate negative pulse corresponding with Y11 failing edge in output signal YP2 The pulse of form.NAND gate FY9 is accomplished that or logic (under negative logic) function, when there is negative arteries and veins in input signal Y P1, YP2 When punching generates, generate positive pulse in the Edge check signal Y31 of NAND gate FY9 output, i.e., when input signal Y 11 changes, NAND gate FY9 exports the pulse of a positive pulse form.In Fig. 9, phase inverter FY6, NAND gate FY7 or door FY8 preferably band are applied The device of Mi Te input, for example, phase inverter selects 74HC14, CD40106 etc.；NAND gate selects 74HC132, CD4093 etc. Deng；Or door selects 74HC7032, or the phase inverters that input of 2 band Schmidts of selection and 1 NAND gate are realized or door function Energy.

Figure 10 is the delay detection circuit embodiment 3 that A phase input signal Y11 is directed in delay detection module, wherein by electricity The rising edge detection circuit that RY1, capacitor CY1, diode DY1, phase inverter FY1 composition are directed to input signal Y 11 is hindered, and by resistance RY2, capacitor CY2, diode DY2, phase inverter FY2, FY3 composition are directed to the failing edge detection circuit of input signal Y 11, Yi Jili Circuit with NAND gate FY4 output Edge check signal Y31 is identical as the embodiment 1 of Fig. 8.In Figure 10, by phase inverter FY11, FY12, FY13, FY14 realize the signal delay of Y11 is obtained Y11 it is delayed after signal Y21.

For A phase input signal Y11 delay detection circuit can choose it is any in Fig. 8, Fig. 9, Figure 10 embodiment 1-3 It is a kind of；Under normal conditions, all signals in gating controlling value are triggered for A, B, C three-phase, is all made of same delay detection Circuit.For example, setting m equal to 7, A, B, C three-phase need 21 delay detection circuits altogether；21 delay detection circuits can be adopted all With the embodiment 1 of Fig. 8, or all using the embodiment of Fig. 92, or all using the embodiment of Figure 10 3.Delay inspection Slowdown monitoring circuit can also realize its function using other circuits met the requirements.

The function of the not trigger region control signal generator module of each phase is, when input mutually triggers gating controlling value for this Any one of Edge check signal is multiple when having pulse relevant to edge, the not trigger region control of the phase A pulse is exported in signal.Figure 11 is that trigger region does not control signal generator module embodiment to A phase, by including m input The Edge check signal gating switch of pull down resistor Rz1-Rzm, m of nor gate FY10, m z1-zm circuit realize it is corresponding The position the m Edge check signal Y31-Y3m of function, A phase is connected to nor gate through Edge check signal gating switch z1-zm respectively The m input terminal of FY10, pull down resistor RZ1-RZm are used to input corresponding nor gate FY10 when some z1-zm open circuit and believe Number drop-down be low level；Nor gate FY10 output is that the not trigger region of A phase controls signal P4A.In Figure 11 embodiment, not trigger region The pulse for controlling signal output is negative pulse, i.e., trigger region control signal low level is not effective；Nor gate FY10 is changed into or Men Shi, the pulse of trigger region control signal output is not positive pulse.If generated in the Edge check signal Y31-Y3M of input Have pulse relevant to edge be negative pulse, then the nor gate FY10 in Figure 11 should be changed to NAND gate either with Door realizes under negative logic or logic function.

The m bit comparison output valve of every phase sampling comparison circuit output all send the position m to phase delay protection circuit defeated Enter end；M Edge check signal gating switch z1-zm is used for the position the M triggering gating controlling value connection in m bit comparison output valve To the input terminal of nor gate FY10, when M is less than m, extra input signal is not attached to the input terminal of nor gate FY10；Example Such as, when m is also equal to 7 equal to 7, M, Edge check signal gating switch z1-z7 is all turned on；When m is equal to 7, M equal to 3, edge inspection It surveys signal gating switch z1-z3 to connect, z4-z7 is disconnected, and pull down resistor RZ4-RZ7 will the subsequent nor gate FY10 of switch z4-z7 Input end signal drop-down is low level, at this point, trigger region control signal is not as produced by the edge variation in Y11-Y13.A phase is adopted M-bit data in the embodiment 1 and embodiment 2 of sample comparison circuit, when M is less than m, other than M triggering gating controlling values In other data will not change, for example, remaining 4 outputs is not when M is equal to 3 in sampling comparison circuit embodiment 1 The low level of change will not generate Edge check signal；When M is equal to 5 in sampling comparison circuit embodiment 2, remaining 5 outputs are Constant high level will not generate Edge check signal；Therefore, when M is less than m, even if by m Edge check signal Y31- Y3m is all connected to the input terminal of nor gate FY10, the signal triggered in addition to gating controlling value in m bit comparison output valve except M It will not make to export pulse in not trigger region control signal；Therefore, defeated using sampling comparison circuit embodiment 1 or embodiment 2 Out when m bit comparison output valve, Rz1-Rzm, m Edge check signal gating switch z1-zm of m pull down resistor in Figure 11 can be with Do not have to, m Edge check signal Y31-Y3m are directly all connected to the input terminal of nor gate FY10.

All gate circuits in delay protection circuit are all made of single supply+VCC1 power supply.Figure 12 is in delay protection circuit Part waveform correlation schematic diagram.From principle and the requirement of sampling comparison circuit it is found that its A phase exported triggers gating controlling value When normal change occurs, change each time with 2.In Figure 12, the Y11 that A phase triggers in gating controlling value occurs one respectively Secondary rising edge changes and failing edge changes, and Y21 is that the A phase after the Y11 delay T1 time triggers gating controlling value；In the delay of Fig. 8 In detection circuit embodiment 1, T1 is determined by the product size (i.e. time constant size) of resistance RY0 and capacitor CY0；Fig. 9's In the detection circuit embodiment 2 that is delayed, T1 is determined by the product size of resistance RY3 and capacitor CY3；In the delay detection circuit of Figure 10 In embodiment 3, T1 is determined by the gate delay time size of phase inverter FY11, FY12, FY13, FY14 itself.In Figure 12, signal Because the negative pulse width that Y11 rising edge generates is T2 in YP1；In the delay detection circuit embodiment 1 of Fig. 8 and the delay inspection of Figure 10 In slowdown monitoring circuit embodiment 3, T2 is determined by the product size of resistance RY1 and capacitor CY1；In the delay detection circuit embodiment 2 of Fig. 9 In, T2 is determined by the product size of resistance RY3 and capacitor CY3.In Figure 12, because of the negative pulse of Y11 failing edge generation in signal YP2 Width is T3；In the delay detection circuit embodiment 1 of Fig. 8 and the delay detection circuit embodiment 3 of Figure 10, T3 is by resistance RY2 It is determined with the product size of capacitor CY2；In the delay detection circuit embodiment 2 of Fig. 9, T3 is multiplied by resistance RY3 and capacitor CY3's Product size determines.In Figure 12,2 positive pulses in Edge check signal Y31 respectively in signal YP1 because Y11 rising edge generates Negative pulse and signal YP2 in the negative pulse that generates by Y11 failing edge it is corresponding.Figure 12 A phase is located to trigger in gating controlling value When rising edge change occurs for Y11, the Y12 that A phase triggers in gating controlling value occurs failing edge and changes, at this time its corresponding edge inspection It surveys signal Y32 and accordingly generates a positive pulse；If A phase triggers the Y12 in gating controlling value when failing edge, which occurs, for Y11 changes A rising edge occurs simultaneously to change, accordingly generates a positive pulse in its corresponding Edge check signal Y32 at this time；In this phase Between, except Y11, Y12 other including triggering gate control value signal including comparison output value signal there is no variation, phase The Edge check signal answered is low level, is not drawn into Figure 12.According to not trigger region above-mentioned control signal generator module Or logic function, trigger region controls common in the single pulse width of signal generator module output and the Edge check signal of input It is identical to generate widest pulse width in the input pulse of the pulse, this width difference is because in different delayed time detection circuit It determines caused by the resistance of T2, T3, the difference of capacitance.In Figure 12, the 1st in the 1st positive pulse ratio Y32 in Y31 is just Pulse is wide, and the 2nd positive pulse in the positive pulse ratio Y32 of the 2nd in Y31 is narrow, not the 1st in trigger region control signal P4A Negative pulse width is consistent with the 1st positive pulse width in Edge check signal Y31, not the 2nd in trigger region control signal P4A A negative pulse width is consistent with the 2nd positive pulse width in Edge check signal Y32.

It is delayed in detection circuit embodiment 1 in the delay protection circuit of Fig. 8, A phase triggers gating controlling value and changes Delay time to corresponding not trigger region control signal pulse forward position is that FY10 prolongs in gate circuit FY1, FY4 and Figure 11 The sum of the delay time of FY10 in the sum of slow time or gate circuit FY3, FY4 and Figure 11；By resistance RY0 and capacitor CY0 The A phase that determines of product size to trigger the range of choice of signal delay time T1 of gating controlling value be the ms order of magnitude, it is clear that it is big Etc. it triggers gating controlling value in A phase to change to the delay time in corresponding not trigger region control signal pulse forward position, i.e., Grade encoded radio signal delay change at the time of be later than A phase trigger gating controlling value change after export pulse forward position when It carves.Strictly speaking, T1 actually includes the delay of lag time and gate circuit FY0 caused by resistance RY0 and capacitor CY0 The sum of time.In Fig. 8 embodiment 1, in selection parameter, the value of the value and T3 that make T2 is all larger than the value of T1, encodes grade Value signal delay change at the time of meet need to be triggered earlier than A phase gating controlling value change after export pulse it is rear along when The requirement at quarter.

In the delay detection circuit embodiment 2 in Fig. 9 delay protection circuit, A phase triggers gating controlling value and changes Delay time to corresponding not trigger region control signal pulse forward position is that FY10 prolongs in gate circuit FY7, FY9 and Figure 11 The sum of the delay time of FY10 in the sum of slow time or gate circuit FY8, FY9 and Figure 11；T1 is the number of the ms order of magnitude Value, it is clear that trigger the signal delay time of gating controlling value by the A phase that the product size of resistance RY3 and capacitor CY3 determines at this time The A phase that T1 is greater than triggers gating controlling value and changes to the delay time in corresponding not trigger region control signal pulse forward position, It is later than A phase at the time of i.e. A phase triggers gating controlling value signal delay change and triggers the list for gating and exporting after controlling value changes The forward position moment of pulse.In the delay detection circuit embodiment 2 of Fig. 9, at the time of A phase triggers gating controlling value signal delay change Trigger the rear of the pulse exported after gating controlling value changes with A phase is influenced by signal YP0 change along the moment；A phase It is the delay after signal YP0 change again through gate circuit FY6 at the time of triggering gating controlling value signal delay changes；A phase triggers choosing The pulse that logical controlling value exports after changing it is rear along the moment be signal YP0 change after again through gate circuit FY7, FY9 and figure Delay after the sum of delay time of FY10 or signal YP0 change in 11 again through FY10 in gate circuit FY8, FY9 and Figure 11 The sum of time；Obviously, A phase triggers gating controlling value signal delay and changes at the time of ratio A phase and triggers and gate controlling value at this time The rear delay time for passing through 2 gate circuits less along the moment of the pulse exported after change meets A phase and triggers gating controlling value letter Number delay need to trigger the rear of pulse that exports after gating controlling value changes at the time of change earlier than A phase and want along the moment It asks.

Figure 13 is Fig. 3 auto compensating type three-phase main circuit unit embodiment 1 to be triggered in trigger unit, or trigger Fig. 4 The trigger circuit embodiment of bidirectional thyristor SR1 in the A phase main circuit of middle auto compensating type three-phase main circuit unit is touched by exchange Shine coupling UG1, resistance RG1, resistance RG2 composition, and Trig control signal P51 low level is effective.Altemating trigger optocoupler UG1 can be selected Select the phase shifts type bidirectional thyristor output photoelectric coupler such as MOC3022, MOC3023, MOC3052, MOC3053.Power supply+VCCA is The A phase trigger circuit controlled source of protected driving unit control.Trigger Fig. 3 auto compensating type three-phase main circuit unit embodiment Bidirectional thyristor SR2-SR6 in 1 A phase main circuit, or triggering Fig. 4 auto compensating type three-phase main circuit unit embodiment 2 A phase main circuit in bidirectional thyristor SR2-SR8 trigger circuit, with triggering A phase main circuit in bidirectional thyristor SR1 circuit Structure is the same, is controlled by A phase Trig control signal P5A.Trigger the trigger circuit structure of all bidirectional thyristors in B phase main circuit As the circuit structure of bidirectional thyristor SR1 in triggering A phase main circuit, controlled by B phase Trig control signal P5B, power supply is equal For+VCCB, the B phase trigger circuit controlled source controlled for protected driving unit.Trigger all two-way brilliant locks in C phase main circuit The trigger circuit structure of pipe triggers control letter as the circuit structure of bidirectional thyristor SR1 in triggering A phase main circuit, by C phase Number P5C control, power supply is+VCCC, for the C phase trigger circuit controlled source of protected driving unit control.The exchange of Figure 14 Trigger the optocoupler UG1 trigger pulse that other altemating trigger optocouplers export from G11, G12 trigger pulse exported and trigger unit Collectively constitute trigger signal P6.

Figure 14 be A phase trigger gating configuration circuit embodiment 1, for realizing triggering gating controlling value high level effectively and M is equal to 7, i.e. M is no more than 7, and triggering when Trig control signal low level is effectively and N is equal to 6 gates configuration.In Figure 14,42 Diode D11-D76,42 configuration switch K11-K76,7 triggering control line Y21-Y27,6 triggerings drive alignment VK1- VK6 forms diode triggered configuring matrix, and resistance RS1-RS6, triode VS1-VS6 form A phase Trig control signal P51-P56 Driving circuit, A phase Trig control signal P5A is formed by P51-P56, controls 6 thyristors.Line is controlled in 7 triggerings The crossover location of Y21-Y27 and 6 triggering driving alignment VK1-VK6 is provided with by diode and configures what switch was composed in series Branch is configured, the diode anode side for configuring branch is connected on triggering control line, and cathode side is connected to triggering driving alignment On.

The A phase of Figure 14 is triggered gating configuration circuit embodiment 1 to be used for for Fig. 3 auto compensating type three-phase main circuit unit A phase main circuit in embodiment 1 compensates control；If A phase AC power source phase voltage fluctuation range is 220V ± 10%, it is desirable that Stablized and is exported in the range of 220V ± 2%；At this point, A phase triggers the Y21-Y27 that gating controlling value is 7, Figure 14 is selected In 7 triggerings control line Y21-Y27 all triggerings gating control line.Table 1 is that triggering gates configuration circuit at this time Triggering gating allocation list, when listing effective for 7 triggering gating controlling value Y21-Y27 difference, configuration is corresponding effective The configuration status of switch is configured when Trig control signal in diode triggered configuring matrix.Triggering gating controlling value Y21-Y27's Effectively corresponding with voltage class section 1-7 respectively, triggering gating configuration circuit is controlled according to triggering gating controlling value by triggering Signal control auto compensating type three-phase main circuit unit embodiment 1 in A phase main circuit in bidirectional thyristor on off operating mode into The corresponding voltage compensation of row.

In table 1, the configuration listed switch is needed to configure as on state, and unlisted configuration switch needs to configure to disconnect State；14 configuration switches are shared in table 1 to need to configure as on state.When certain root triggering gating control line is effective, with The configuration switchgear distribution that on-off assembled state needs to be connected between the triggering driving alignment of bidirectional thyristor is corresponded to when its is effective is On state is attached through diode, keeps the triggering driving line for needing to be connected bidirectional thyristor effective.For example, A phase inputs Voltage is minimum voltage class 1, i.e. Y21 when being effectively high level, K11, K16 conducting in diode triggered configuring matrix, Diode D11, D16 is connected, triggering driving line VK1, VK6 controls triode VS1, VS6 conducting for high level respectively to be made P51, P56 effectively go to open bidirectional thyristor SR1, SR6, other diodes cut-off in diode triggered configuring matrix, control Other bidirectional thyristors are turned off, positive compensation is carried out using the magnet exciting coil voltage that output voltage U12+U23 is TB1；Input electricity When be voltage class 2, i.e. Y22 be effectively high level, K23, K26 in diode triggered configuring matrix are connected pressure, make diode D23, D26 conducting, triggering driving line VK3, VK6 controls triode VS3, VS6 conducting for high level respectively keeps P53, P56 effective It goes to open bidirectional thyristor SR3, SR6, other diodes cut-off in diode triggered configuring matrix, it is two-way that control turns off other Thyristor carries out positive compensation only with the magnet exciting coil voltage that output voltage U23 is TB1；Input voltage be voltage class 4, That is when Y24 is effectively high level, K45, K46 in diode triggered configuring matrix are connected, and diode D45, D46 are connected, touching Hair driving line VK5, VK6 controls triode VS5, VS6 conducting for high level respectively makes P55, P56 effectively go to open two-way brilliant lock Pipe SR5, SR6, other diodes cut-off in diode triggered configuring matrix, control turn off other bidirectional thyristors, realize 0 electricity Pressure compensation；Input voltage is voltage class 5, i.e. Y25 when being effectively high level, K52, K53 in diode triggered configuring matrix Diode D52, D53 is connected in conducting, and triggering driving line VK2, VK3 are that high level controls triode VS2, VS3 conducting respectively P52, P53 is set effectively to go to open bidirectional thyristor SR2, SR3, other diodes cut-off in diode triggered configuring matrix, control System turns off other bidirectional thyristors, carries out Contrary compensation only with the magnet exciting coil voltage that reversed output voltage U12 is TB1；Deng Deng.

Table 1

The A phase of Figure 14 is triggered gating configuration circuit embodiment 1 to be used for for Fig. 3 auto compensating type three-phase main circuit unit A phase main circuit in embodiment 1 compensates control, and A phase AC power source phase voltage fluctuation range is 220V ± 10%, it is desirable that will Its stabilization exports in the range of 220V ± 4%；At this point, A phase triggers the Y21-Y23 that gating controlling value is 3, select in Figure 14 3 triggerings control line Y21-Y23 be triggering gating control line.Table 2 is the triggering choosing of triggering gating configuration circuit at this time Logical allocation list configures corresponding effectively triggering control when listing effective for 3 triggering gating controlling value Y21-Y23 difference The configuration status of switch is configured when signal processed in diode triggered configuring matrix.A phase triggers the difference of gating controlling value Y21-Y23 It is effectively corresponding with voltage class section 1-3.

In table 2, the configuration listed switch is needed to configure as on state, and unlisted configuration switch needs to configure to disconnect State；6 configuration switches are shared in table 2 to need to configure as on state.A phase input voltage is that voltage class 1, i.e. Y21 is effective When for high level, K13, K16 conducting in diode triggered configuring matrix is connected diode D13, D16, triggering driving line VK3, VK6 control triode VS3, VS6 conducting for high level respectively makes P53, P56 effectively go to open bidirectional thyristor SR3, SR6, Other diodes cut-off in diode triggered configuring matrix, control turns off other bidirectional thyristors, only with output voltage U23 The magnet exciting coil voltage for being TB1 carries out positive compensation；Input voltage is voltage class 2, i.e. Y22 when being effectively high level, two poles Pipe triggers K25, K26 conducting in configuring matrix, and diode D25, D26 is connected, and triggering driving line VK5, VK6 are high level Control triode VS5, VS6 conducting makes P55, P56 effectively go to open bidirectional thyristor SR5, SR6, diode triggered configuration respectively Other diodes cut-off in matrix, control turn off other bidirectional thyristors, realize 0 voltage compensation；Input voltage is voltage etc. When 3, i.e. Y23 of grade is effectively high level, K34, K35 in diode triggered configuring matrix are connected, and lead diode D34, D35 It is logical, triggering driving line VK4, VK5 be high level control respectively triode VS4, VS5 conducting make P54, P55 effectively go to open it is double To thyristor SR4, SR5, other diodes in diode triggered configuring matrix end, and control turns off other bidirectional thyristors, Contrary compensation is carried out only with the magnet exciting coil voltage that reversed output voltage U23 is TB1.

Table 2

Figure 15 be A phase trigger gating configuration circuit embodiment 2, for realizing triggering gating controlling value low level effectively and M is equal to 10, i.e. M is no more than 10, and Trig control signal low level is effectively and triggering when compensating control of 8, i.e. N equal to 8 gates Configuration.In Figure 15,80 diode D01-D98,80 configuration switch K01-K98,10 triggerings control line Y21-Y210,8 Root triggering driving alignment VK1-VK8 forms diode triggered configuring matrix, is driven by 8 triggerings of diode triggered configuring matrix Alignment VK1-VK8 directly exports the effective A phase Trig control signal P51-P58 of low level, forms P5A.It is controlled in 10 triggerings The crossover location of line Y21-Y210 and 8 triggering driving alignment VK1-VK8 are provided with by diode and configuration switch series connection The configuration branch of composition, the diode cathode side for configuring branch are connected on triggering control line, and anode-side is connected to triggering and drives On dynamic alignment.The main region of the triggering gating configuration circuit embodiment 1 of the triggering gating configuration circuit embodiment 2 and Figure 14 of Figure 15 It is not that triggering gating controlling value low level is effective, and is effectively passed through by the low level of triggering gating controlling value and configure conducting Diode drives directly as the driving source of the input terminal light emitting diode of multiple altemating trigger optocouplers without Trig control signal Dynamic circuit.

The A phase of Figure 15 is triggered gating configuration circuit embodiment 2 to be used for for Fig. 4 auto compensating type three-phase main circuit unit A phase main circuit in embodiment 2 compensates control；If A phase AC power source phase voltage fluctuation range be 220V+10% extremely 220V-20%, it is desirable that stablized and exported in the range of 220V ± 2%；At this point, it is 10 that A phase, which triggers gating controlling value, Y21-Y210 selects all triggering gating control lines of 10 triggerings control line Y21-Y210 in Figure 15.Table 3 is at this time The triggering of triggering gating configuration circuit gates allocation list, and the triggering gating controlling value Y21-Y210 listed for 10 has respectively When effect, the configuration status of switch is configured when configuring corresponding effective Trig control signal in diode triggered configuring matrix.Triggering The difference for gating controlling value Y21-Y210 is effectively corresponding with voltage class section 1-10, and triggering gating configuration circuit is according to triggering choosing Logical controlling value is controlled double in the A phase main circuit in auto compensating type three-phase main circuit unit embodiment 2 by Trig control signal Corresponding voltage compensation is carried out to the on off operating mode of thyristor.

In table 3, the configuration listed switch is needed to configure as on state, and unlisted configuration switch needs to configure to disconnect State；20 configuration switches are shared in table 3 to need to configure as on state.When certain root triggering gating control line is effective, with The configuration switchgear distribution that on-off assembled state needs to be connected between the triggering driving alignment of bidirectional thyristor is corresponded to when its is effective is On state is attached through diode, keeps the triggering driving line for needing to be connected bidirectional thyristor effective.For example, A phase inputs Voltage is voltage class 7, i.e. Y27 when being effectively low level, and K77, K78 conducting in diode triggered configuring matrix make two poles Pipe D77, D78 conducting, triggering driving line VK7, VK8 are that low level goes to open bidirectional thyristor SR7, SR8, and diode triggered is matched Other diodes cut-off in matrix is set, other bidirectional thyristors are turned off, realizes 0 voltage compensation, i.e. the excitation voltage of TB1 is 0； Input voltage is voltage class 8, i.e. Y28 when being effectively low level, and K82, K83 conducting in diode triggered configuring matrix make Diode D82, D83 are logical, and triggering driving line VK2, VK3 are that low level goes to open bidirectional thyristor SR2, SR3, diode triggered Other diodes cut-off in configuring matrix, turns off other bidirectional thyristors, encourages only with reversed output voltage U12 TB1 Coil voltage carries out Contrary compensation；Input voltage is voltage class 10, i.e. Y210 when being effectively low level, and diode triggered is matched K04, K05 conducting in matrix are set, diode D04, D05 is connected, triggering driving line VK4, VK5 goes to open double for low level To thyristor SR4, SR5, other diodes in diode triggered configuring matrix end, and turn off other bidirectional thyristors, only adopt Contrary compensation is carried out with the magnet exciting coil voltage that reversed output voltage U23 is TB1；Input voltage is that voltage class 6, i.e. Y26 has When effect is low level, K61, K64 in diode triggered configuring matrix are connected, and diode D61, D64 is connected, triggering driving row Line VK1, VK4 are that low level goes to open bidirectional thyristor SR1, SR4, other diodes in diode triggered configuring matrix are cut Only, other bidirectional thyristors are turned off, carry out positive compensation only with the magnet exciting coil voltage that output voltage U12 is TB1；Input electricity When be voltage class 4, i.e. Y24 be effectively low level, K43, K46 in diode triggered configuring matrix are connected pressure, make diode D43, D46 conducting, triggering driving line VK3, VK6 are that low level goes to open bidirectional thyristor SR3, SR6, diode triggered configuration Other diodes cut-off in matrix, turns off other bidirectional thyristors, and the magnet exciting coil electricity of TB1 is done only with output voltage U23 Pressure carries out positive compensation；Input voltage is voltage class 1, i.e. Y21 when being effectively low level, in diode triggered configuring matrix K11, K18 conducting, are connected diode D11, D18, and triggering driving line VK1, VK8 are that low level goes to open bidirectional thyristor SR1, R8, other diodes cut-off in diode triggered configuring matrix, turn off other bidirectional thyristors, using output voltage The magnet exciting coil voltage that U12+U23+U34 is TB1 carries out positive compensation；Etc..

Table 3

The A phase of Figure 15 is triggered gating configuration circuit embodiment 2 to be used for for Fig. 4 auto compensating type three-phase main circuit unit A phase main circuit in embodiment 2 compensates control；If A phase AC power source phase voltage fluctuation range is 220V ± 15%, it is desirable that Stablized and is exported in the range of 220V ± 3.5%；At this point, A phase triggers the Y21-Y25 that gating controlling value is 5, selection figure 5 triggerings control line Y21-Y25 in 15 is triggering gating control line.Table 4 is the touching of triggering gating configuration circuit at this time Hair gating allocation list configures corresponding effectively touching when listing effective for 5 triggering gating controlling value Y21-Y25 difference The configuration status of switch is configured when hair control signal in diode triggered configuring matrix.Point of triggering gating controlling value Y21-Y25 Effectively not corresponding with voltage class section 1-5, triggering gating configuration circuit passes through triggering control letter according to triggering gating controlling value Number control auto compensating type three-phase main circuit unit embodiment 2 in A phase main circuit in bidirectional thyristor on off operating mode carry out Corresponding voltage compensation.

In table 4, the configuration listed switch is needed to configure as on state, and unlisted configuration switch needs to configure to disconnect State；10 configuration switches are shared in table 4 to need to configure as on state.For example, A phase input voltage is voltage class 3, i.e. When Y23 is effectively low level, K37, K38 in diode triggered configuring matrix are connected, and diode D37, D38 are connected, triggering Driving line VK7, VK8 are that low level goes to open bidirectional thyristor SR7, SR8, other two poles in diode triggered configuring matrix Pipe cut-off, turns off other bidirectional thyristors, realizes 0 voltage compensation；Input voltage is that voltage class 1, i.e. Y21 is effectively low level When, diode D11, D16 is connected in K11, K16 conducting in diode triggered configuring matrix, triggering driving line VK1, VK6 It goes to open bidirectional thyristor SR1, SR6 for low level, other diodes cut-off in diode triggered configuring matrix turns off other Bidirectional thyristor carries out positive compensation using the magnet exciting coil voltage that output voltage U12+U23 is TB1；Input voltage is voltage When class 4, i.e. Y24 are effectively low level, K46, K47 in diode triggered configuring matrix are connected, and lead diode D46, D47 Logical, triggering driving line VK6, VK7 are that low level removes to open bidirectional thyristor SR6, SR7, in diode triggered configuring matrix The cut-off of other diodes, turns off other bidirectional thyristors, only with reversed output voltage U34 do the magnet exciting coil voltage of TB1 into Row Contrary compensation；Etc..

Table 4

The embodiment 2 that the A phase of Figure 15 triggers gating configuration circuit is used for for Fig. 4 auto compensating type three-phase main circuit unit When A phase main circuit in embodiment 2 compensates control, the low level in triggering gating controlling value needs to directly drive 2 friendships The input terminal lumination of light emitting diode of stream triggering optocoupler；Whens altemating trigger optocoupler selects MOC3022, MOC3052 etc., 20mA is needed Driving current；Whens altemating trigger optocoupler selects MOC3023, MOC3053 etc., the driving current of 10mA is needed.The triggering of Figure 15 The embodiment 2 of gating configuration circuit can be used for for the A phase in Fig. 3 auto compensating type three-phase main circuit unit embodiment 1 Main circuit compensates control, at this point, the low level in triggering gating controlling value is also required to directly drive 2 altemating trigger optocouplers Input terminal lumination of light emitting diode.

The embodiment 1 that the A phase of Figure 14 triggers gating configuration circuit can be used for for the main electricity of Fig. 4 auto compensating type three-phase A phase main circuit in road unit embodiment 2 compensates control, at this time, it may be necessary to increase triggering control line quantity and triggering drive Dynamic alignment quantity.When Figure 14, Figure 15 extend, institute of the diode triggered configuring matrix in triggering control line and triggering driving alignment There is infall to be required to that the configuration branch being composed in series by diode and configuration switch is arranged.

B phase, C phase trigger gating configuration circuit using the identical triggering gating configuration circuit of A phase, and respective diode triggered is matched The configuration switch in matrix is set using identical configuration method and configuration status with A phase.

Error detection differentiate the function of circuit be when having in the position M for judging triggering gating controlling value and when only one effective, It enables the triggering gating controlling value of output differentiate that signal is effective, otherwise enables the triggering of output gate controlling value and differentiate invalidating signal；I.e. Triggering gating controlling value the position M in only have one it is effective when, or without one it is effective when, enable output triggering gate control Value processed differentiates invalidating signal.

Figure 16 is that the error detection of A phase differentiates circuit embodiments 1, inputs and triggers gating controlling value Y21-Y27 for A phase, for high electricity Flat effective, m 7, i.e., up to 7 triggering gating controlling value P3A are differentiated；The A phase of output triggers gating controlling value Differentiate that signal P7A high level is effective, low level is invalid；I.e. output P7A is 1, and it is effective to indicate that A phase triggers gating controlling value；Output P7A is 0, and it is invalid to indicate that A phase triggers gating controlling value.In Figure 16, FD3 is with the input of 7 bit address and 1 data output ROM memory, gated switch k1-k7 is connected to 7 bit address input A0-A6 to 7 triggering gating controlling value Y21-Y27 respectively, Triggering gating controlling value differentiates that signal P7A is exported from data output end D0；Pull down resistor RX1-RX7 is used to open a way when gating switch When, corresponding ROM memory input signal is pulled down as low level.Table 5 is the logical truth that the error detection of A phase differentiates circuit embodiments 1 It is worth the memory cell content tables of data of ROM memory in table and Figure 16.The content of ROM memory storage unit is pressed in Figure 16 According to the data write-in of table 5.If it is 7 that the A phase of input, which triggers gating controlling value P3A, i.e. M is equal to 7, then by the gating in Figure 16 Switch k1-k7 is all closed, and it is defeated that 7 triggering gating controlling value Y21-Y27 all actually enter 7 bit address to ROM memory Enter A0-A6.In table 5, have in only 7 Y21-Y27 of triggering gating controlling value and when only one is effective 1, enables output A phase trigger gating controlling value differentiate signal P7A be effective 1, otherwise enable the A phase of output trigger gating controlling value differentiate signal P7A it is invalid 0, meet the functional requirement that error detection differentiates circuit.

Table 5

In Figure 16, if it is 3 that the A phase of input, which triggers gating controlling value P3A, i.e. M is equal to 3, then by the gating in Figure 16 Switch k1-k3 closure, k4-k7 are disconnected；3 triggering gating controlling value Y21-Y23 are actually entered to 3 bit address of ROM memory A0-A2 is inputted, the other 4 bit address input A3-A6 of ROM memory is 0 by pull down resistor drop-down；At this point, the 4-7 in table 5 Capable input condition can not generate, and only A phase triggers has and only one is effective in 3 Y21-Y23 of gating controlling value 1 when, enable the A phase of output trigger gating controlling value differentiate signal P7A be effective 1, otherwise enable the A phase of output trigger gating control Value processed differentiates invalid 0 signal P7A, meets the functional requirement that error detection differentiates circuit.

In Figure 16, the triggering gating controlling value if necessary to output differentiates that signal P7A low level is effective, and high level is invalid, Then by the content of 1 column data last in table 5, all 0 change 1,1 becomes 0.

Figure 17 is that the error detection of A phase differentiates circuit embodiments 2, and it is Y21-Y210, needle that the A phase of input, which triggers gating controlling value P3A, , m 10 effective to low level, i.e., up to 10 A phases trigger gating controlling value P3A and are differentiated；The A phase of output triggers It gates controlling value and differentiates that signal P7A high level is effective, low level is invalid；I.e. output P7A is 1, indicates that A phase triggers gating controlling value Effectively；Exporting P7A is 0, and it is invalid to indicate that A phase triggers gating controlling value.In Figure 17, FD4 is with the input of 10 bit address and 1 digit According to the ROM memory of output, gated switch j1-j10 is connected to 10 ground to 10 triggering gating controlling value Y21-Y210 respectively Location inputs A0-A9, and A phase triggers gating controlling value and differentiates that signal P7A is exported from data output end D0；Pull-up resistor RJ1-RJ10 is used In when gating switch is opened a way, corresponding ROM memory input signal is pulled up as high level.Table 6 is that error detection differentiates that circuit is real Apply the memory cell content tables of data of ROM memory in the logic true value table and Figure 17 of example 2.

The content of ROM memory storage unit is written according to the data of table 6 in Figure 17.If the A phase of input triggers gating Controlling value P3A is 10, i.e. M is equal to 10, then is all closed the gating switch j1-j10 in Figure 17,10 triggering gating controls Value Y21-Y210 is all actually entered to 10 bit address of ROM memory and is inputted A0-A9.In table 6, only A phase triggers gating control Have in 10 Y21-Y210 of value processed and when only one is effective 1, enables the A phase of output trigger gating controlling value and differentiate signal P7A is effective 1, otherwise enables the A phase of output trigger gating controlling value and differentiates signal P7A is invalid 0, meets error detection and differentiate electricity The functional requirement on road.

Table 6

In Figure 17, if the triggering gating controlling value P3A of input is 5, i.e. M is equal to 5, then by the gating switch in Figure 17 K1-k5 closure, k6-k10 are disconnected；5 triggering gating controlling value Y21-Y25 are actually entered to the 9 bit address input of ROM memory A0-A4, the other 5 bit address input A5-A9 of ROM memory are 1 by pull-up resistor pull-up；At this point, the 6-10 row in table 6 Input condition can not generate, only A phase triggers has and only one effective 0 in 5 Y21-Y25 of gating controlling value When, it enables the A phase of output trigger gating controlling value and differentiates that signal P7A is effective 1, the A phase of output is otherwise enabled to trigger gating control Value differentiates invalid 0 signal P7A, meets the functional requirement that error detection differentiates circuit.

In Figure 17, the triggering gating controlling value if necessary to output differentiates that signal P7A low level is effective, and high level is invalid, Then by the content of 1 column data last in table 6, all 0 change 1,1 becomes 0.

In the embodiment 1 and embodiment 2 of sampling comparison circuit, when M is less than m, sampling comparison circuit, which is sent to this, mutually to be prolonged When protection circuit signal in addition to M triggerings gating controlling value, the state of included m-M of other comparison output valves and its prolong The state to lag is identical as the state of invalid bit in M triggering gating controlling values, will not influence to M triggering gating controls of the phase Whether value effectively differentiates；Therefore at this point, gating switch k1-k7 and pull down resistor RX1-RX7 in Figure 16 can not used, directly It connects and 7 bit comparison output valve Y21-Y27,7 bit address for being connected to ROM memory is inputted into A0-A6；Gating switch j1- in Figure 17 J10 and pull-up resistor RJ1-RJ10 can not used, and 10 bit comparison output valve Y21-Y210 are directly connected to ROM memory 10 bit address input A0-A9.

Error detection differentiates that the logic function of circuit can also be realized in other ways, for example, table 5, table 6 are logic true value Table, can with or NOT logic door to combine realize the function.Error detection differentiates the ROM memory in circuit, or adopts When realizing function with logic gate, it is all made of single supply+VCC1 power supply.

B phase, C phase error detection differentiate that circuit differentiates circuit using the identical error detection of A phase.B phase error detection differentiates that the function of circuit is When judging to have in the position M that B phase triggers gating controlling value P3B and when only one effective, the B phase of output is enabled to trigger gating control Value differentiates that signal P7B is effective, otherwise enables the B phase of output trigger gating controlling value and differentiates that signal P7B is invalid；C phase error detection differentiates electricity The function on road is to enable the C of output touch when judging to have in the position M that C phase triggers gating controlling value P3C and when only one effective Hair gating controlling value differentiates that signal P7C is effective, otherwise enables the C phase of output trigger gating controlling value and differentiates that signal P7C is invalid.

Figure 18 is protection drive unit embodiment, if the A phase of input, B phase, B phase trigger gating, controlling value differentiates signal The equal high level of P7A, P7B, P7C is effective, and low level is invalid；For example, P7A, which triggers gating controlling value for 1 expression A phase, differentiates that signal has Effect, P7A are that 0 expression A phase triggers gating controlling value differentiation invalidating signal.If trigger region control is not believed for the A phase of input, B phase, B phase Number equal low level of P4A, P4B, P4C is effective, and high level is invalid；For example, when P4A is 0 showing that A phase galvanic electricity source phase voltage is handed over to exist Fluctuation makes A phase trigger gating controlling value and produces variation, needs to carry out bidirectional thyristor on-off shape in A phase thyristor switch group The switching of state changes compensation way；In handoff procedure, to avoid because the factor that bidirectional thyristor is delayed to turn off makes ipsilateral crystalline substance There are 2 or 2 or more thyristors to simultaneously turn on simultaneously in brake tube, causes power supply short circuit, it is effective in not trigger region control signal When period, the i.e. P4A of embodiment are equal to 0, all bidirectional thyristors in A phase thyristor switch group are turned off.

In Figure 18, with door FY21, triode VT, freewheeling diode VD, resistance RK1, relay coil KA, relay coil KB, relay coil KC composition protection control circuit；With door FY22, triode VK1, triode VK2, resistance RK2, resistance RK3 Form A phase trigger circuit controlled source+VCCA control circuit；With door FY23, triode VK3, triode VK4, resistance RK4, electricity It hinders RK5 and forms B phase trigger circuit controlled source+VCCB control circuit；With door FY24, triode VK5, triode VK6, resistance RK6, resistance RK7 form C phase trigger circuit controlled source+VCCC control circuit.It is all made of with door FY21, FY22, FY23, FY24 Single supply+VCC1 power supply；+ VCC2 is the power supply of relay coil and the source current of trigger circuit controlled source.

In Figure 18, differentiate that signal P7A, B phase trigger gating controlling value and differentiates signal when the A phase of input triggers gating controlling value P7B, C phase trigger gating controlling value and differentiate there is one in signal P7C for low level, i.e., A phase triggers gating controlling value, B phase triggers Gating controlling value, C phase trigger have in gating controlling value one it is invalid when, the output P7K with door FY21 is low level, controls three poles Pipe VT cut-off, relay coil KA power loss make Fig. 3 auto compensating type three-phase main circuit unit embodiment 1, or make Fig. 4 certainly Relay normally open switch KA-1 in the compensation three-phase main circuit unit embodiment 2 of coupling is disconnected, i.e. control disconnects auto-transformer Input side supply voltage, make the voltage 0 between all taps of auto-transformer, realize the protection to thyristor switch group； Relay normally closed switch KA-2 closure, makes the voltage 0 being applied on TB1 magnet exciting coil.Triode VT cut-off, while control after Electric apparatus coil KB, relay coil KC power loss, make that B phase main circuit, corresponding relay switch executes and A phase in C phase main circuit The protection to B phase, C phase thyristor switch group is realized in the identical movement of relay switch in main circuit.With the output of door FY21 P7K is low level, while making to export low level, triode VK1, VK2, VK3, VK4, VK5, VK6 with door FY22, FY23, FY24 It is turned off, the equal power loss of controlled source+VCCA ,+VCCB ,+VCCC, A phase trigger circuit, B phase trigger circuit, C in trigger unit Phase trigger circuit is not because having power supply without working, i.e., the uneven trigger pulse for issuing triggering bidirectional thyristor.Therefore, only Want have the triggering gating controlling value of a phase invalid in three-phase triggering gating controlling value, the three-phase no matter inputted not believe by trigger region control Effectively whether number, protection driving unit all cut off the power supply of trigger unit, stops the triggering of all bidirectional thyristors of sending Pulse, while the input side supply voltage for disconnecting 3-phase autotransformer is controlled, realize the protection to three-phase thyristor switching group.

In Figure 18, differentiate that signal P7A, B phase trigger gating controlling value and differentiates signal when the A phase of input triggers gating controlling value P7B, C phase trigger gating controlling value and differentiate all high level of signal P7C, i.e., A phase triggers gating controlling value, B phase triggers gating Controlling value, C phase trigger gating controlling value it is all effective when, be high level, triode VT conducting, control with the output P7K of door FY21 Relay coil KA processed obtains electric, makes Fig. 3 auto compensating type three-phase main circuit unit embodiment 1, or make Fig. 4 auto compensating type Relay normally open switch KA-1 closure in three-phase main circuit unit embodiment 2, relay normally closed switch KA-2 is disconnected, at circuit In compensation work state.Triode VT conducting, at the same control relay coil KB, relay coil KC obtains electric, make the main electricity of B phase Corresponding relay switch executes and the identical movement of relay switch in A phase main circuit, B phase, C phase crystalline substance in road, C phase main circuit Thyristor switch group is in compensation work state.

In Figure 18, when three-phase triggering gating controlling value is all effective, P7K are high level, when trigger region does not control letter to A phase Number effectively, i.e. P4A be equal to 0 when, with door FY22 export low level, triode VK1, VK2 cut-off, controlled source+VCCA power loss, A Phase trigger circuit does not work, i.e., does not issue the trigger pulse that bidirectional thyristor is triggered in A phase thyristor switch group, and shutdown A phase is brilliant All bidirectional thyristors in thyristor switch group show that A phase AC power source phase voltage has fluctuation at this time, A phase are made to trigger gating control Value processed produces variation, needs to carry out the switching of bidirectional thyristor on off operating mode in A phase thyristor switch group, changes compensation side Formula.When it is high level that three-phase, which triggers the whole effective, P7K of gating controlling value, when trigger region does not control invalidating signal, i.e. P4A to A phase When equal to 1, high level is exported with door FY22, triode VK1, VK2 are both turned on, and controlled source+VCCA obtains electric, A phase trigger circuit It works normally, gating configuration circuit is triggered by A phase and triggers gating according to effective, corresponding with some voltage class section A phase Controlling value selects corresponding A phase Trig control signal effective, and A phase trigger circuit is made to issue trigger pulse, and control A phase thyristor is opened The on off operating mode of bidirectional thyristor in the group of pass, A phase main circuit are in compensation work state corresponding with the voltage class section.

In Figure 18, when three-phase triggering gating controlling value is all effective, P7K are high level, when trigger region does not control letter to B phase Number effectively, i.e. P4B be equal to 0 when, with door FY23 export low level, triode VK3, VK4 cut-off, controlled source+VCCB power loss, B Phase trigger circuit does not work, i.e., does not issue the trigger pulse that bidirectional thyristor is triggered in B phase thyristor switch group, and shutdown B phase is brilliant All bidirectional thyristors in thyristor switch group show that B phase AC power source phase voltage has fluctuation at this time, B phase are made to trigger gating control Value processed produces variation, needs to carry out the switching of bidirectional thyristor on off operating mode in B phase thyristor switch group, changes compensation side Formula.When it is high level that three-phase, which triggers the whole effective, P7K of gating controlling value, when trigger region does not control invalidating signal, i.e. P4B to B phase When equal to 1, high level is exported with door FY23, triode VK3, VK4 are both turned on, and controlled source+VCCB obtains electric, B phase trigger circuit It works normally, gating configuration circuit is triggered by B phase and triggers gating according to effective, corresponding with some voltage class section B phase Controlling value selects corresponding B phase Trig control signal effective, and B phase trigger circuit is made to issue trigger pulse, and control B phase thyristor is opened The on off operating mode of bidirectional thyristor in the group of pass, B phase main circuit are in compensation work state corresponding with the voltage class section.

In Figure 18, when three-phase triggering gating controlling value is all effective, P7K are high level, when trigger region does not control letter to C phase Number effectively, i.e. P4C be equal to 0 when, with door FY24 export low level, triode VK5, VK6 cut-off, controlled source+VCCC power loss, C Phase trigger circuit does not work, i.e., does not issue the trigger pulse that bidirectional thyristor is triggered in C phase thyristor switch group, and shutdown C phase is brilliant All bidirectional thyristors in thyristor switch group show that C phase AC power source phase voltage has fluctuation at this time, C phase are made to trigger gating control Value processed produces variation, needs to carry out the switching of bidirectional thyristor on off operating mode in C phase thyristor switch group, changes compensation side Formula.When it is high level that three-phase, which triggers the whole effective, P7K of gating controlling value, when trigger region does not control invalidating signal, i.e. P4C to C phase When equal to 1, high level is exported with door FY24, triode VK5, VK6 are both turned on, and controlled source+VCCC obtains electric, C phase trigger circuit It works normally, gating configuration circuit is triggered by C phase and triggers gating according to effective, corresponding with some voltage class section C phase Controlling value selects corresponding C phase Trig control signal effective, and C phase trigger circuit is made to issue trigger pulse, and control C phase thyristor is opened The on off operating mode of bidirectional thyristor in the group of pass, C phase main circuit are in compensation work state corresponding with the voltage class section.

There is the triggering gating controlling value of a phase invalid in gating controlling value when three-phase triggers, protection driving unit issues protection Signal is controlled to three-phase main circuit, when three-phase thyristor switching group being made to be in guard mode, three-phase ac voltage stabilizer is not right Input voltage compensates, and the voltage of voltage-stablizer output is the three-phase alternating-current supply phase voltage inputted.In thyristor switch group When in guard mode, if three-phase triggering gating controlling value full recovery is useful signal, driving unit is protected to stop automatically The only guard mode of three-phase thyristor switching group, three-phase thyristor switching group are in compensation work state again.

It is each mutually to trigger from above embodiment and its course of work it is found that when input gates controlling value for effective triggering Gating configuration circuit ensure that ipsilateral thyristor does not simultaneously turn in this phase thyristor switch group, realizes the mutual lock control of thyristor System；And when triggering gating controlling value is invalid, protection driving unit avoids two-way in the power supply of cutting trigger unit rapidly On the basis of the conducting of thyristor mistake causes short circuit, the input side supply voltage of all auto-transformers in three-phase is simultaneously switched off, Three-phase thyristor switching group is set to be in guard mode.When three-phase thyristor switching group is in guard mode, if three-phase is examined When to misjudge the triggering gating controlling value full recovery of other circuit judges three-phase be useful signal, then three-phase thyristor can be automatically stopped The guard mode of switching group simultaneously makes it be in compensation work state again.Above-mentioned function effectively strengthens three-phase alternating current pressure stabilizing dress The protection for course of work exception is set, keeps the work of the three-phase ac voltage stabilizer relatively reliable.

Except for the technical features described in the specification, the other technologies of three-phase ac voltage stabilizer are those skilled in the art The routine techniques grasped.

Claims

1. a kind of three-phase ac voltage stabilizer, it is characterised in that: single including auto compensating type three-phase main circuit unit, compensation control Member, trigger unit, protection driving unit；

Every phase main circuit of auto compensating type three-phase main circuit unit includes that compensator transformer, auto-transformer, thyristor are opened Pass group, relay protection circuit；

It compensates control unit and exports three-phase Trig control signal to trigger unit；Trigger unit is controlled according to the triggering of input to be believed Number, trigger signal is issued to compensation three-phase main circuit unit, controls the on-off of thyristor in three-phase thyristor switching group；Compensation Control unit exports three-phase simultaneously, and trigger region control signal and three-phase triggering gating controlling value do not differentiate that signal is single to protection driving Member, protection driving unit differentiate whether signal effectively stops/starting to three-phase according to the three-phase triggering gating controlling value of input The protection of thyristor switch group, at the same according to three-phase trigger gating controlling value differentiate signal whether effectively and three-phase not trigger region control Signal processed whether the power supply effectively to control trigger unit.

2. three-phase ac voltage stabilizer according to claim 1, it is characterised in that: the compensation control unit is tied by three The identical compensation control circuit composition of structure；Three compensation control circuits carry out voltage to three-phase alternating-current supply phase voltage respectively and adopt Sample, trigger region control signal, three-phase triggering gating controlling value do not differentiate signal for output three-phase Trig control signal, three-phase.

3. three-phase ac voltage stabilizer according to claim 2, it is characterised in that: compensation control circuit includes in each phase Sample comparison circuit, delay protection circuit, triggering gating configuration circuit, error detection differentiation circuit；Comparison circuit is sampled to alternating current Source phase voltage carries out voltage sample, and output triggering gating controlling value is simultaneously sent to delay protection circuit；Delay protection circuit exports not The triggering that trigger region controls after signal and delay gates controlling value；Triggering gating controlling value after delay is sent to triggering gating and matches Circuits and error detection differentiate circuit；Triggering gating configuration circuit exports Trig control signal；Error detection differentiates that circuit differentiates input Whether triggering gating controlling value is effective, and output triggering gating controlling value differentiates signal.

4. three-phase ac voltage stabilizer according to claim 3, it is characterised in that: sampling comparison circuit in each phase includes M-1 comparator, upper limit threshold potentiometer, lower threshold potentiometer；Adjust upper limit threshold potentiometer and lower threshold potentiometer The voltage of AC power source phase voltage waving interval range can be adjusted to M voltage class section, export M triggering gating controls Value processed；M voltage class section is corresponded with M triggering gating controlling value；The m is more than or equal to 3, and the M is less than or equal to m。

5. three-phase ac voltage stabilizer according to claim 4, it is characterised in that: error detection differentiates that circuit differentiates in each phase Whether the triggering gating controlling value of input is effective according to being, in the position the M binary value of triggering gating controlling value, has and only one When position is effective, triggering gating controlling value is effective；Otherwise, triggering gating controlling value is invalid.

6. three-phase ac voltage stabilizer according to claim 5, it is characterised in that: voltage class section and electricity in each phase Compensating coefficient is pressed to correspond, the corresponding voltage compensation state in each voltage class section；Different voltage compensation states by The on-off assembled state control that thyristor is different in thyristor switch group；Triggering gating configuration circuit is according to triggering gating control Value, is selected by diode triggered configuring matrix and keeps corresponding Trig control signal effective, controls brilliant lock in thyristor switch group The on-off assembled state of pipe.

7. three-phase ac voltage stabilizer according to claim 6, it is characterised in that: in each phase in thyristor switch group altogether There is N number of thyristor；Diode triggered configuring matrix includes m root triggering control line, N root triggering driving alignment；The triggering driving of N root Alignment and N number of thyristor correspond, and an effectively corresponding triggering for making a thyristor of triggering driving alignment signal controls letter Number effectively；

It is respectively provided in the crossover location of every triggering control line and every triggering driving alignment by diode and configuration switch series Join the configuration branch of composition；When triggering control line signal is that low level is effective, the diode cathode side for configuring branch is connected to On triggering control line, anode-side is connected on triggering driving alignment；When triggering control line signal is that high level is effective, configuration The diode anode side of branch is connected on triggering control line, and cathode side is connected on triggering driving alignment；The N be greater than Integer equal to 4.

8. three-phase ac voltage stabilizer according to claim 6, it is characterised in that: configure to configure in branch in each phase and open The configuration method of pass is to trigger in control line in m root, M root therein is selected to gate control line for triggering；The triggering choosing of M root Logical control line is corresponded with M triggering gating controlling values, and a triggering gating controlling value is corresponding to make a triggering gating control Line processed is effective；When every triggering gating control line signal is effective, the on-off of thyristor in a corresponding thyristor switch group Assembled state；Corresponding on-off assembled state needs to control brilliant lock when by every triggering gating control line and effective line signal The configuration switchgear distribution configured in branch between the triggering driving alignment of pipe conducting is on-state；By every triggering gating control The triggering that corresponding on-off assembled state needs to control thyristor shutdown when line and effective line signal drives matches between alignment Setting the configuration switchgear distribution in branch is off-state.

9. three-phase ac voltage stabilizer according to claim 1 to 8, it is characterised in that: controlled not in each phase Trigger region controls signal and exports a pulse after triggering gating controlling value changes；Trigger region control signal is not exporting During pulse effectively, invalid during non-output pulse.

10. three-phase ac voltage stabilizer according to claim 9, it is characterised in that: in each phase in delay protection circuit, The triggering gating control value signal change moment of delay is later than after triggering gating controlling value changes not trigger region control signal The forward position moment of middle pulse, and trigger region controls in signal after pulse earlier than triggering after gating controlling value changes Along the moment.