CN101795084B - Thyristor rectifier bridge parallel operation full digital current homogenizing control device - Google Patents
Thyristor rectifier bridge parallel operation full digital current homogenizing control device Download PDFInfo
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Abstract
The invention discloses a thyristor rectifier bridge parallel operation full digital current homogenizing control device, which comprises a regulator, a rectifier cabinet controller, thyristor rectifier bridges and a detection component. The regulator is a master controller; the rectifier cabinet controller is a slave controller; a terminal signal processing module regulates terminal voltage and current signals of a generator, so that the terminal voltage and current signals are suitable to be output to an analog-to-digital conversion module of a regulator controller; and a synchronization signal processing module regulates the anode voltage of the rectifier cabinet thyristor rectifier bridges, so the anode voltage is suitable to be output to a pulse formation module of the regulator controller to serve as a synchronization signal of the anode voltage of the thyristor rectifier bridges. Due to the adoption of digital closed loop control, full digital intelligent current homogenization for a plurality of parallel operation thyristor rectifier bridges under full-motion environment is realized by real-time sampling and control.
Description
Technical field
The present invention relates to motor excitation control field, relate generally to thyristor rectifier bridge parallel operation full digital current homogenizing control device.
Background technology
Excitation unit is generally become by excitation regulator cabinet, excitation rectifier cabinet, demagnetization and overvoltage protection group.Comprise an independently thyristor rectifier bridge in each excitation rectifier cabinet, the excitation unit of large-scale unit is generally by a plurality of excitation rectifier cabinet (thyristor rectifier bridge) while paired running.The thyristor rectifier bridge of paired running is owing to the parameter discrete property of each thyristor, reason such as wiring length is different, contact resistance varies in size; Can cause the thyristor rectifier bridge output current to exist, make that the thyristor rectifier bridge load of paired running is very unbalanced than big-difference.Like this, the quality of the thyristor that long-term load is heavy degenerates, and reliability reduces, and the lost of life causes damage.The thyristor that damages is out of service, has increased the burden of other thyristor again, causes chain reaction.Solve the balanced method of paired running thyristor rectifier bridge output current and be called flow equalize technology.Usually the flow equalize technology that adopts has to be selected the suitable long line current-sharing of ac cable, realizes current-sharing, installs REgulatable reactor additional, the trigger impulse of thyristor element such as is finely tuned at method at each thyristor rectifier bridge DC side copper bar through the thyristor parameter matching.Wherein adopt the mode of the long line current-sharing of ac cable, the cable utilance is low, and when the failed thyristor rectifier bridge was out of service, corresponding cable was out of service, therefore, needs more cable redundant, increases cost.The thyristor parameter matching realizes current-sharing, because after the thyristor operation, parameter changes, the current-sharing effect can't guarantee for a long time.Install the REgulatable reactor current-sharing additional, increased reactance, unfavorable to the thyristor switching-over.And the trigger impulse of thyristor element is finely tuned, employing be analogy method, be difficult for to realize the support arm current-sharing, and be easy to generate temperature and float that long-time stability are poor.
Summary of the invention
In order to overcome the defective of above-mentioned existing control device, the present invention aims to provide a kind of thyristor rectifier bridge parallel operation full digital current homogenizing control device that needs the current-sharing occasion to use when being adapted at rectifier cabinet parallel running in the excitation system.The present invention adopts digital closed-loop control, and stability is improved greatly.
The present invention realizes through following technical proposals:
Thyristor rectifier bridge parallel operation full digital current homogenizing control device; Comprise adjuster, rectifier cabinet controller, thyristor rectifier bridge and detection means; It is characterized in that: said adjuster is a master controller, is made up of machine end signal processing module, synchronizing signal processing module and adjustor controller; Said rectifier cabinet controller is a slave controller, is made up of rectifier cabinet controller control module, rectifier cabinet controller analog-to-digital conversion module, rectifier cabinet controller pulse shaping module, rectifier cabinet controller switches amount input/output module and rectifier bridge display controller; Thyristor rectifier bridge isolates trigger module by thyristor full-controlled rectifier bridge, pulse amplification module, pulse transformer and concentrated reverse blocking spike absorption module is formed; Detection means is made up of current sensor, sensor electrical source module, rectifier cabinet controller and analog-to-digital conversion module; Said machine end signal processing module adjustment generator terminal voltage signal and current signal make it be fit to output to the adjustor controller analog-to-digital conversion module; The anode voltage of synchronizing signal processing module adjustment rectifier cabinet thyristor rectifier bridge makes it be fit to output to adjustor controller pulse shaping module, becomes the synchronizing signal of the anode voltage of thyristor rectifier bridge.
Said adjustor controller is PAC controller or IPC controller or other microcomputerized controller, is made up of adjustor controller analog-to-digital conversion module, adjustor controller pulse shaping module, adjustor controller control module, adjustor controller switching input module and adjustor controller switching value output module; Adjustor controller Sampling Machine end signal; Through exchanging algorithm, calculate the instantaneous three-phase line voltage, phase voltage, each phase active power, each phase reactive power, voltage effective value, current effective value of generator, total active power and total reactive power and power factor.
Said adjustor controller through pid algorithm, calculates the master control angle of thyristor rectifier bridge according to generator signal and given signal; Adjustor controller pulse shaping module is sent the six phase trigger impulse according to the synchronizing signal of the anode voltage of master control angle and thyristor rectifier bridge, outputs to rectifier cabinet controller pulse shaping module, becomes total triggering synchronous signal of thyristor rectifier bridge; Adjustor controller calculates the electric current that each thyristor rectifier bridge support arm should pass through according to the number of the operation rectifier cabinet of reality, and this electric current is as the electric current set-point of each support arm; Compare support arm electric current set-point and each rectifier cabinet thyristor rectifier bridge support arm current actual value, draw the current-sharing phase shifting angle of each support arm, be transferred to the rectifier cabinet controller at last.
Said rectifier cabinet controller calculates the instantaneous value of each support arm electric current of thyristor rectifier bridge, through network, is transferred to adjustor controller; Rectifier cabinet controller pulse shaping module is carried out phase shift and is triggered according to the current-sharing phase shifting angle of total triggering synchronous signal and each support arm, sends triggering signal, outputs to the pulse amplification module.
Said pulse amplification module trigger impulse produces series of pulses, and produces strong start pulse signal, and pulse signal outputs to pulse transformer and isolates trigger module through after the power amplification; Pulse transformer is isolated the high voltage circuit of trigger module isolated controlling loop and thyristor rectifier bridge; Pulse transformer is isolated the filp-flop stage of trigger module output trigger impulse to thyristor rectifier bridge, the output current size of control thyristor rectifier bridge.
Said concentrated reverse blocking spike absorbs module, is made up of high-tension fuse, high pressure three-phase commutation bridge and Resistor-Capacitor Unit; High-tension fuse prevents element fault, and the high pressure three-phase commutation bridge is with the three-phase alternating voltage rectification, and the spike that will commutate is added to Resistor-Capacitor Unit, makes the switching-over spike be suppressed and absorb.
The current sensor of said detection means is a Hall element, and three Hall elements are installed on respectively on rectifier cabinet U, V, the W three-phase alternating current inlet wire, and the working power of each phase Hall element is ± 15V to be provided by the sensor electrical source module; Hall element will flow through the alternating current that exchanges on the inlet wire and be transformed into ± d. c. voltage signal of 5V, and this signal is connected to behind the analog-to-digital conversion module through filtering calculating and exchanges calculating, calculates each support arm electric current of thyristor rectifier bridge.
During use; The current detecting device is measured the thyristor rectifier bridge ac-side current and the signal feedback that measures is arrived the rectifier cabinet controller; Sampling through the rectifier cabinet controller is calculated; Calculate the average current of each support arm thyristor element on the thyristor rectifier bridge respectively, this result of calculation is transferred to adjuster through the EPA network, and adjuster is when carrying out routine control calculating; Adopt to regulate the equal flow algorithm of control figure again, calculate respectively that each support arm thyristor of paired running thyristor rectifier bridge needs for current-sharing to move current-sharing phase shifting control angle; This phase shifting control angle sends to each rectifier cabinet controller through the EPA network again, and the triggering control impuls of each support arm thyristor obtains adjustment, thereby paired running thyristor rectifier bridge output current is reached unanimity.Through real-time sampling, closed-loop control, can guarantee that the thyristor rectifier bridge of paired running is in equal stream mode in real time.
The present invention has the following advantages:
One, thyristor rectifier bridge parallel operation full digital current homogenizing control device, employing be digital closed loop sharing control.Adjuster and rectifier cabinet controller are digital microcomputerized controller fully, and its signal sampling, control are calculated and pulse shaping all adopts digital form to realize; Adopt duplex industry Ethernet to carry out network communication between adjuster and the rectifier cabinet controller, the data of all collections and current-sharing phase shifting control angle are all transmitted through duplex industry Ethernet with digital mode.Adopt the equal stream mode of digital closed loop higher than other equal stream mode control precisions, and do not have temperature and float, structure is more simple and reliable, and controlling schemes is flexible, and parameter adjustment is convenient, and is also more stable.The control effect can adapt to the rectifier cabinet of various structures through the program adjustment.The scope of current-sharing phase shift has the tracing trouble ability through software control, prevents the fault that flow equalizing circuit causes.And closed-loop control can guarantee the current-sharing precision under various running statuses, has that real-time degree is high, current stabilizing factor is greater than 95% characteristics.
Two, accomplish measurements and calculations through the rectifier cabinet controller to each support arm thyristor element average current on the thyristor rectifier bridge; Realize the equal flow algorithm of adjusting control figure of current-sharing by adjuster; Can judge which arm element fault easily; Which bar branch road is out of service, and how many parallelly connected support arms of normal operation has, and this is that other equal stream modes can't realize; The adjusting control effect of paired running thyristor rectifier bridge is responsible for completion by adjuster, more easily failure judgement and assurance current-sharing effect.
Three, gather, carry out digital filtering and grab sampling analysis in real time through current value to every thyristor rectifier bridge of paired running; Carry out the numerical value transmission through duplex industry Ethernet; The current-sharing that realizes is the current-sharing of parallelly connected support arm, is superior to the current-sharing between the rectifier bridge.Realized many paired runnings thyristor rectifier bridge full-digital intelligent current-sharing under full dynamic environment.
Description of drawings
Fig. 1 is the excitation system schematic diagram
Fig. 2 is the rectifier cabinet schematic diagram
Fig. 3 is for concentrating reverse blocking spike principle of absorption figure
Fig. 4 is rectifier bridge principle and support arm current sample schematic diagram
Mark among the figure: 1, adjuster, 2, the rectifier cabinet controller, 3, thyristor rectifier bridge, 4, detection means; 5, machine end signal processing module, 6, the synchronizing signal processing module, 7, adjustor controller, 8, rectifier cabinet controller control module; 9, rectifier cabinet controller analog-to-digital conversion module, 10, rectifier cabinet controller pulse shaping module, 11, rectifier cabinet controller switches amount input/output module, 12, the rectifier bridge display controller; 13, thyristor full-controlled rectifier bridge, 14, the pulse amplification module, 15, pulse transformer isolates trigger module, 16, concentrate the reverse blocking spike to absorb module; 17, current sensor, 18, the sensor electrical source module, 19, analog-to-digital conversion module, 20, the adjustor controller analog-to-digital conversion module; 21, adjustor controller pulse shaping module, 22, the adjustor controller control module, 23, the adjustor controller switching input module; 24, adjustor controller switching value output module, 25, high-tension fuse, 26, the high pressure three-phase commutation bridge.
Embodiment
Thyristor rectifier bridge parallel operation full digital current homogenizing control device; Comprise adjuster 1, rectifier cabinet controller 2, thyristor rectifier bridge 3 and detection means 4; Said adjuster 1 is a master controller, is made up of machine end signal processing module 5, synchronizing signal processing module 6 and adjustor controller 7; Said rectifier cabinet controller 2 is a slave controller, is made up of rectifier cabinet controller control module 8, rectifier cabinet controller analog-to-digital conversion module 9, rectifier cabinet controller pulse shaping module 10, rectifier cabinet controller switches amount input/output module 11 and rectifier bridge display controller 12; Thyristor rectifier bridge 3 isolates trigger module 15 by thyristor full-controlled rectifier bridge 13, pulse amplification module 14, pulse transformer and concentrated reverse blocking spike absorption module 16 is formed; Detection means 4 is made up of current sensor 17, sensor electrical source module 18, rectifier cabinet controller 2 and analog-to-digital conversion module 19; Said machine end signal processing module 5 adjustment generator terminal voltage signal and current signals make it be fit to output to adjustor controller analog-to-digital conversion module 20; The anode voltage of synchronizing signal processing module 6 adjustment thyristor rectifier bridges 3 makes it be fit to output to adjustor controller pulse shaping module 21, becomes the synchronizing signal of the anode voltage of thyristor rectifier bridge 3.The core component adjustor controller 7 of said adjuster 1 is the PAC controller, and machine end signal processing module 5 adjustment generator terminal voltage signal and current signals make it be fit to output to adjustor controller analog-to-digital conversion module 20.The anode voltage of synchronizing signal processing module 6 adjustment thyristor rectifier bridges 3 makes it be fit to output to adjustor controller pulse shaping module 21, becomes the synchronizing signal of the anode voltage of thyristor rectifier bridge 3.Adjustor controller 7 Sampling Machine end signals; Through exchanging algorithm, calculate the instantaneous three-phase line voltage, phase voltage, each phase active power, each phase reactive power, voltage effective value, current effective value of generator, total active power and total reactive power and power factor.Adjustor controller 7 through pid algorithm, calculates the master control angle of thyristor rectifier bridge 3 according to generator signal and given signal.Adjustor controller pulse shaping module 21 is sent the six phase trigger impulse according to the synchronizing signal of the anode voltage of master control angle and thyristor rectifier bridge 3, outputs to rectifier cabinet controller pulse shaping module 10, becomes total triggering synchronous signal of thyristor rectifier bridge 3.Each rectifier cabinet controller 2 calculates the instantaneous value of each support arm electric current of thyristor rectifier bridge 3, through network, is transferred to adjustor controller 7.Adjustor controller 7 calculates the electric current that each thyristor rectifier bridge 3 support arm should pass through according to the number of the operation rectifier cabinet of reality, and this electric current is as the electric current set-point of each support arm.When calculating support arm electric current set-point; Adopt the thyristor quantity of actual parallel connection; So thyristor rectifier bridge 3 each support arm+U ,+V ,+W ,-U ,-V ,-W is not necessarily identical, because some support arm failover of possibility is out of service, thereby support arm electric current set-point is not necessarily identical.Relatively support arm electric current set-point and each thyristor rectifier bridge 3 support arm current actual values, if support arm electric current set-point greater than thyristor rectifier bridge 3 support arm current actual values accordingly, the current-sharing phase shifting angle of this support arm equals zero; If support arm electric current set-point is less than corresponding thyristor rectifier bridge 3 support arm current actual values, this error amount is regulated and time-delay through PI, calculates the current-sharing phase shifting angle of support arm.The current-sharing phase shifting angle generally gives the minimax restriction.Adjustor controller 7 calculates the current-sharing phase shifting angle of each support arm of thyristor rectifier bridge 3, generally only calculates the current-sharing phase shifting angle of the support arm that thyristor rectifier bridge 3 just organizing, and through network, is transferred to rectifier cabinet controller 2.Rectifier cabinet controller pulse shaping module 10 is carried out phase shift and is triggered according to the current-sharing phase shifting angle of total triggering synchronous signal and each support arm, sends triggering signal, outputs to pulse amplification module 14.The function of pulse amplification module 14 is trigger impulses, produces series of pulses, and produces strong start pulse signal, and pulse signal outputs to pulse transformer and isolates trigger module 15 through after the power amplification.The function that pulse transformer is isolated trigger module 15 is through high insulation voltage pulse transformer, the high voltage circuit of isolated controlling loop and thyristor rectifier bridge 3.Pulse transformer is isolated the filp-flop stage of trigger module 15 output trigger impulses to thyristor rectifier bridge 3, the output current size of control thyristor rectifier bridge 3.
When exciter current of generator is big, like 2000A, need several rectifier cabinet thyristor rectifier bridge 3 parallel runnings, the detection means 4 of each thyristor rectifier bridge 3 comprises current sensor 17, on U, V, W cross streams inlet wire, three current sensors 17 is installed respectively.Current sensor 17 adopts Hall element, prevents that the electromagnetic type current sensor is owing to the magnetic bias of the asymmetric generation of electric current is measured inaccurate.Each phase Hall element can detect the positive thyristor that is connected with this and the electric current of negative crystal brake tube, avoids each support arm that current sensor 17 is installed.Detection means 4 output of thyristor rectifier bridge 3 is connected to rectifier cabinet controller analog-to-digital conversion module 9, and rectifier cabinet controller 2 is gathered the signal of current sensors 17, calculates and exchanges calculating through filtering, calculates each support arm electric current of thyristor rectifier bridge 3.120 ° of electrical degrees of each support arm conducting.This waveform is a trapezoidal wave, and the hypotenuse of trapezoidal wave is by the secondary side leakage reactance decision of the exciting current and the excitation transformer of generator.Behind the trapezoidal wave zero crossing, increase if signal is positive direction, this signal is the current signal of positive thyristor; Otherwise, behind the trapezoidal wave zero crossing,, signal increases if being the direction of bearing, and this signal is the current signal of negative thyristor.After interchange is calculated and can be passed through at a high speed repeatedly sample rate current transducer 17 signals, the average current after calculating positive or the conducting of negative thyristor.Exchanging calculating can also be behind the trapezoidal wave zero crossing, and enough commutation angles of delaying time as 45 °, after wait positive or negative thyristor conducting switching-over are accomplished, calculate the conducting electric current of thyristor.
Thyristor rectifier bridge parallel operation full digital current homogenizing control device; Comprise adjuster 1, rectifier cabinet controller 2, thyristor rectifier bridge 3 and detection means 4; Said adjuster 1 is a master controller, is made up of machine end signal processing module 5, synchronizing signal processing module 6 and adjustor controller 7; Said rectifier cabinet controller 2 is a slave controller, is made up of rectifier cabinet controller control module 8, rectifier cabinet controller analog-to-digital conversion module 9, rectifier cabinet controller pulse shaping module 10, rectifier cabinet controller switches amount input/output module 11 and rectifier bridge display controller 12; Thyristor rectifier bridge 3 isolates trigger module 15 by thyristor full-controlled rectifier bridge 13, pulse amplification module 14, pulse transformer and concentrated reverse blocking spike absorption module 16 is formed; Detection means 4 is made up of current sensor 17, sensor electrical source module 18, rectifier cabinet controller 2 and analog-to-digital conversion module 19; Said machine end signal processing module 5 adjustment generator terminal voltage signal and current signals make it be fit to output to adjustor controller analog-to-digital conversion module 20; The anode voltage of synchronizing signal processing module 6 adjustment thyristor rectifier bridges 3 makes it be fit to output to adjustor controller pulse shaping module 21, becomes the synchronizing signal of the anode voltage of thyristor rectifier bridge 3.The core component adjustor controller 7 of said adjuster 1 is the IPC controller, and machine end signal processing module 5 adjustment generator terminal voltage signal and current signals make it be fit to output to adjustor controller analog-to-digital conversion module 20.The anode voltage of synchronizing signal processing module 6 adjustment thyristor rectifier bridges 3 makes it be fit to output to adjustor controller pulse shaping module 21, becomes the synchronizing signal of the anode voltage of thyristor rectifier bridge 3.Adjustor controller 7 Sampling Machine end signals; Through exchanging algorithm, calculate the instantaneous three-phase line voltage, phase voltage, each phase active power, each phase reactive power, voltage effective value, current effective value of generator, total active power and total reactive power and power factor.Adjustor controller 7 through pid algorithm, calculates the master control angle of thyristor rectifier bridge 3 according to generator signal and given signal.Adjustor controller pulse shaping module 21 is sent the six phase trigger impulse according to the synchronizing signal of the anode voltage of master control angle and thyristor rectifier bridge 3, outputs to rectifier cabinet controller pulse shaping module 10, becomes total triggering synchronous signal of thyristor rectifier bridge 3.Each rectifier cabinet controller 2 calculates the instantaneous value of each support arm electric current of thyristor rectifier bridge 3, through network, is transferred to adjustor controller 7.Adjustor controller 7 calculates the electric current that each thyristor rectifier bridge 3 support arm should pass through according to the number of the operation rectifier cabinet of reality, and this electric current is as the electric current set-point of each support arm.When calculating support arm electric current set-point; Adopt the thyristor quantity of actual parallel connection; So thyristor rectifier bridge 3 each support arm+U ,+V ,+W ,-U ,-V ,-W is not necessarily identical, because some support arm failover of possibility is out of service, thereby support arm electric current set-point is not necessarily identical.Relatively support arm electric current set-point and each thyristor rectifier bridge 3 support arm current actual values, if support arm electric current set-point greater than thyristor rectifier bridge 3 support arm current actual values accordingly, the current-sharing phase shifting angle of this support arm equals zero; If support arm electric current set-point is less than corresponding thyristor rectifier bridge 3 support arm current actual values, this error amount is regulated and time-delay through PI, calculates the current-sharing phase shifting angle of support arm.The current-sharing phase shifting angle generally gives the minimax restriction.Adjustor controller 7 calculates the current-sharing phase shifting angle of each support arm of thyristor rectifier bridge 3, generally only calculates the current-sharing phase shifting angle of the support arm that thyristor rectifier bridge 3 just organizing, and through network, is transferred to rectifier cabinet controller 2.Rectifier cabinet controller pulse shaping module 10 is carried out phase shift and is triggered according to the current-sharing phase shifting angle of total triggering synchronous signal and each support arm, sends triggering signal, outputs to pulse amplification module 14.The function of pulse amplification module 14 is trigger impulses, produces series of pulses, and produces strong start pulse signal, and pulse signal outputs to pulse transformer and isolates trigger module 15 through after the power amplification.The function that pulse transformer is isolated trigger module 15 is through high insulation voltage pulse transformer, the high voltage circuit of isolated controlling loop and thyristor rectifier bridge 3.Pulse transformer is isolated the filp-flop stage of trigger module 15 output trigger impulses to thyristor rectifier bridge 3, the output current size of control thyristor rectifier bridge 3.
When exciter current of generator is big, like 2100A, need several rectifier cabinet thyristor rectifier bridge 3 parallel runnings, the detection means 4 of each thyristor rectifier bridge 3 comprises current sensor 17, on U, V, W cross streams inlet wire, three current sensors 17 is installed respectively.Current sensor 17 adopts Hall element, prevents that the electromagnetic type current sensor is owing to the magnetic bias of the asymmetric generation of electric current is measured inaccurate.Each phase Hall element can detect the positive thyristor that is connected with this and the electric current of negative crystal brake tube, avoids each support arm that current sensor 17 is installed.Detection means 4 output of thyristor rectifier bridge 3 is connected to rectifier cabinet controller analog-to-digital conversion module 9, and rectifier cabinet controller 2 is gathered the signal of current sensors 17, calculates and exchanges calculating through filtering, calculates each support arm electric current of thyristor rectifier bridge 3.120 ° of electrical degrees of each support arm conducting.This waveform is a trapezoidal wave, and the hypotenuse of trapezoidal wave is by the secondary side leakage reactance decision of the exciting current and the excitation transformer of generator.Behind the trapezoidal wave zero crossing, increase if signal is positive direction, this signal is the current signal of positive thyristor; Otherwise, behind the trapezoidal wave zero crossing,, signal increases if being the direction of bearing, and this signal is the current signal of negative thyristor.After interchange is calculated and can be passed through at a high speed repeatedly sample rate current transducer 17 signals, the average current after calculating positive or the conducting of negative thyristor.Exchanging calculating can also be behind the trapezoidal wave zero crossing, and enough commutation angles of delaying time as 45 °, after wait positive or negative thyristor conducting switching-over are accomplished, calculate the conducting electric current of thyristor.
The invention is not restricted to above embodiment, but all should fall within the claim protection range of the present invention.
Claims (4)
1. thyristor rectifier bridge parallel operation full digital current homogenizing control device; Comprise adjuster (1), rectifier cabinet controller (2), thyristor rectifier bridge (3) and detection means (4); Said adjuster (1) is a master controller, is made up of machine end signal processing module (5), synchronizing signal processing module (6) and adjustor controller (7); Said rectifier cabinet controller (2) is a slave controller, is made up of rectifier cabinet controller control module (8), rectifier cabinet controller analog-to-digital conversion module (9), rectifier cabinet controller pulse shaping module (10), rectifier cabinet controller switches amount input/output module (11) and rectifier bridge display controller (12); Thyristor rectifier bridge (3) isolates trigger module (15) by thyristor full-controlled rectifier bridge (13), pulse amplification module (14), pulse transformer and concentrated reverse blocking spike absorption module (16) is formed; Detection means (4) is made up of current sensor (17), sensor electrical source module (18), rectifier cabinet controller (2) and analog-to-digital conversion module (19); Said machine end signal processing module (5) adjustment generator terminal voltage signal and current signal make it be fit to output to adjustor controller analog-to-digital conversion module (20); The anode voltage of synchronizing signal processing module (6) adjustment rectifier cabinet thyristor rectifier bridge (3); Make it be fit to output to adjustor controller pulse shaping module (21); Become the synchronizing signal of the anode voltage of thyristor rectifier bridge (3); It is characterized in that: said adjustor controller (7) is PAC controller or IPC controller, is made up of adjustor controller analog-to-digital conversion module (20), adjustor controller pulse shaping module (21), adjustor controller control module (22), adjustor controller switching input module (23) and adjustor controller switching value output module (24); Adjustor controller (7) Sampling Machine end signal; Through exchanging algorithm, calculate the instantaneous three-phase line voltage, phase voltage, each phase active power, each phase reactive power, voltage effective value, current effective value of generator, total active power and total reactive power and power factor; Said adjustor controller (7) through pid algorithm, calculates the master control angle of thyristor rectifier bridge (3) according to generator signal and given signal; Adjustor controller pulse shaping module (21) is according to the synchronizing signal of the anode voltage of master control angle and thyristor rectifier bridge (3); Send the six phase trigger impulse; Output to rectifier cabinet controller pulse shaping module (10), become total triggering synchronous signal of thyristor rectifier bridge (3); Adjustor controller (7) calculates the electric current that each thyristor rectifier bridge (3) support arm should pass through according to the number of the operation rectifier cabinet of reality, and this electric current is as the electric current set-point of each support arm; Compare support arm electric current set-point and each rectifier cabinet thyristor rectifier bridge (3) support arm current actual value, draw the current-sharing phase shifting angle of each support arm, be transferred to rectifier cabinet controller (2) at last.
2. according to the said thyristor rectifier bridge parallel operation full digital current homogenizing control device of claim 1; It is characterized in that: said rectifier cabinet controller (2) calculates the instantaneous value of each support arm electric current of thyristor rectifier bridge (3); Through network, be transferred to adjustor controller (7); Rectifier cabinet controller pulse shaping module (10) is carried out phase shift and is triggered according to the current-sharing phase shifting angle of total triggering synchronous signal and each support arm, sends triggering signal, outputs to pulse amplification module (14).
3. according to the said thyristor rectifier bridge parallel operation full digital current homogenizing control device of claim 2; It is characterized in that: said pulse amplification module (14) trigger impulse; Produce series of pulses; And produce strong start pulse signal, pulse signal outputs to pulse transformer and isolates trigger module (15) through after the power amplification; Pulse transformer is isolated the high voltage circuit of trigger module (15) isolated controlling loop and thyristor rectifier bridge (3); Pulse transformer is isolated the filp-flop stage of trigger module (15) output trigger impulse to thyristor rectifier bridge (3), the output current size of control thyristor rectifier bridge (3).
4. according to the said thyristor rectifier bridge parallel operation full digital current homogenizing control device of claim 1; It is characterized in that: the current sensor (17) of said detection means (4) is a Hall element; Three Hall elements are installed on respectively on rectifier cabinet U, V, the W three-phase alternating current inlet wire; The working power of each phase Hall element is ± 15V to be provided by sensor electrical source module (18); Hall element will flow through the alternating current that exchanges on the inlet wire and be transformed into ± d. c. voltage signal of 5V, and this signal is connected to analog-to-digital conversion module (19) back through filtering calculating with exchange calculating, calculates each support arm electric current of thyristor rectifier bridge (3).
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