CN203278683U - Thyristor rectification microcomputer intelligent control circuit - Google Patents

Abstract

The utility model discloses a thyristor rectification microcomputer intelligent control circuit. The thyristor rectification microcomputer intelligent control circuit comprises a main loop and a control loop. The technical effects of the utility model are that: a digital trigger and a digital regulator are combined based on a STC89S52 series one chip microcomputer, so that the thyristor rectification microcomputer intelligent control circuit has the characteristic of not depending on a system precise digital model, and accordingly, the thyristor rectification microcomputer intelligent control circuit has a better robustness for the parameter time-varying characteristic and uncertainty of a system, and can simultaneously consider the advantages of flexible intelligent control, strong adaptability and high classic PID adjusting stability; the hardware structure is simplified effectively, the running reliability of a rectification system is improved, and the highly symmetry among the trigger pulse phases can be guaranteed, thereby reducing the non-characteristic harmonic component of the rectification output; and the thyristor rectification microcomputer intelligent control circuit is suitable for the occasions having higher requirements for thyristor rectification control performance, such as electrolysis, electroplating, DC charging, etc., is especially suitable for the occasions having large interference, strong nonlinearity and indeterminate controlled objects, and displays the higher practical value of a microcomputer intelligent control device.

Description

Thyristor rectifier microcomputer-based intelligent control circuit

Technical field

The utility model relates to the electric power system devices field, particularly a kind of thyristor rectifier microcomputer-based intelligent control circuit.

Background technology

The application of modern power electronics technology almost relates to each industrial department of national economy.The thyristor rectifier technology is one of power electronic technology of using the earliest, is widely used in the fields such as electrochemical treatments, general friendship orthogonal power supply, generation of electricity by new energy technology.Wherein, be one of power rectifier circuit the most widely in present commercial Application based on the phase control rectifier circuit of thyristor.The digitizing technique of controlling based on microcomputer-based intelligent is one of main direction of electronic power rectification technical development.Compared to traditional analog control technique, simple in structure except circuits for triggering based on the digitizing technique that microcomputer-based intelligent is controlled, control flexibly, temperature floats that impact is little, control precision can be by software compensation, has also that output waveform is stable, reliability is high, phase shift range is easy to the characteristics such as adjusting.Phase control rectifier circuit based on microcomputer-based intelligent control; take single chip microcomputer as core; can realize easily that not only pulse output, phase shift trigger, the various functions such as protection restriction, state-detection and various control algorithm design; and have the advantages such as the phase shifting accuracy of control is high, reliable trigger is strong, software modification is flexible, thereby be used widely in Practical Project.

The problem that the thyristor rectifier controller that uses at present exists is as follows:

1. there are the shortcomings such as the symmetry of dispersiveness, null offset, poor anti jamming capability, trigger impulse of component parameters is undesirable in the analog trigger that is made of resolution element or middle small scale integrated circuit.In addition, with regard to analog trigger, when the phase sequence of input three phase mains not simultaneously, the corresponding thyristor of trigger impulse and corresponding synchrotrans also must strictly be compared with oscilloscope, guarantee triggers the consistency of phase sequence.And miscellaneous functions such as phase shortage measuring ability, soft start-stop function, overcurrent protection function also must could be realized by other design circuit.So whole control circuit is quite loaded down with trivial details in design and debug phase.

2. special digital trigger, its core is the CMOS large-scale digital ic, and is provided with the buffer interface of a function admirable between adjuster and high-power main circuit.In addition, development along with programmable logic device and EDA technology, new digital circuits for triggering based on CPLD take full advantage of the powerful System Programming of CPLD (ISP) function and Digital Logic disposal ability, thereby have greatly improved reliability and the flexibility of circuits for triggering.For the special digital trigger, the major defect of its existence is that applicable versatility is limited, and flexibility is not enough, and the corresponding parameter inconvenience etc. of adjusting in the pid algorithm that generally adopts of trigger.

3. for based on micro-processor controlled digital trigger, the programmed algorithm that adopts due to controlled system and the impact of hardware design methods, phase jitter, poor anti jamming capability, control precision are lower etc. is its present ubiquitous subject matter.

4. on engineering, PID regulates simple in structure because of it and has suitable robustness, so be still most widely used control law.Yet the controlled device complicated mechanism of Silicon Controlled Rectification System not only have parameter time varying and serious non-linear, and system running state has very strong uncertainty usually.In this case, when requiring control system to possess higher control performance, adopt classical pid control algorithm just to be difficult to reach corresponding control requirement.In addition, the classical PID algorithm relies on larger to pid parameter, and adjusting usually of parameter is comparatively loaded down with trivial details, and workload is very large.

Summary of the invention

In order to solve the existing problem of present thyristor rectifier controller, it is a kind of based on the STC89S52 series monolithic that the utility model provides, the thyristor rectifier microcomputer-based intelligent control circuit that digital trigger and digital governer are combined.

In order to realize above-mentioned technical purpose, the technical solution of the utility model is, a kind of thyristor rectifier microcomputer-based intelligent control circuit comprises major loop and control loop, and described major loop comprises power supply and the scr rectification circuit of series connection successively; Described control loop comprises power supply and synchronous signal acquisition module, feedback and given signal sampling module, pulse phase shifting triggering and output module and digital voltage and current regulating module; Described digital voltage is connected with given signal sampling module communication with feedback with output module with synchronous signal acquisition module, pulse phase shifting triggering with power supply respectively with current regulating module, power supply and synchronous signal acquisition module are connected to pulse phase shifting and trigger and output module, feedback is connected major loop with given signal sampling module by the direct current detection module, and pulse phase shifting triggers and the output of output module is connected to major loop.

Described a kind of thyristor rectifier microcomputer-based intelligent control circuit, the scr rectification circuit of described major loop comprises rectifier transformer and the three-phase commutation bridge of series connection successively, described rectifier transformer connects power supply, and three-phase commutation bridge connects the output of pulse phase shifting triggering and output module.

described a kind of thyristor rectifier microcomputer-based intelligent control circuit, described power supply and synchronous signal acquisition module comprise synchrotrans, the D.C. regulated power supply output module, synchronous circuit, phase sequence self-adaption circuit and open-phase protection circuit, the input of described synchrotrans connects power supply, output is connected to synchronous circuit and D.C. regulated power supply output module, the output of D.C. regulated power supply output module is connected to digital voltage and current regulating module, the output of synchronous circuit is connected to respectively phase sequence self-adaption circuit and open-phase protection circuit, the output of open-phase protection circuit is connected to the phase sequence self-adaption circuit, the output of phase sequence self-adaption circuit is connected to pulse phase shifting and triggers and output module.

Described a kind of thyristor rectifier microcomputer-based intelligent control circuit; also comprise overcurrent protection relay and Control output circuit; described overcurrent protection relay is arranged at the output of power supply; the control end of described Control output circuit connects respectively power supply and synchronous signal acquisition module and digital voltage and current regulating module, and the output of Control output circuit connects the control end of overcurrent protection relay.

Described a kind of thyristor rectifier microcomputer-based intelligent control circuit, the I/O circuit interface and parameter setting and the data storage module that also comprise series connection successively, the output of described parameter setting and data storage module be linking number word voltage and current regulating module and pulse phase shifting triggering and output module respectively.

Technique effect of the present utility model is, based on the STC89S52 series monolithic, digital trigger and digital governer are combined, have the advantages that not rely on system's mathematical models, thereby parameter time varying and the uncertainty of system had robustness preferably, can take into account Based Intelligent Control flexibly, strong adaptability and the high advantage of classical PID modification stability.Not only can effectively simplify hardware configuration, improve the operational reliability of commutation system, and can guarantee that the height of trigger impulse phasetophase is symmetrical, thereby reduce the uncharacteristic harmonics component of rectification output.This device possesses certain detection certainly and self diagnostic capability, be applicable to the occasion that electrolysis, plating, DC charging etc. are had relatively high expectations to the thyristor rectifier control performance, be particularly useful for the uncertain occasion of large interference, strong nonlinearity and controlled object, shown the higher practical value of this microcomputer-based intelligent control device.

Description of drawings

Fig. 1 is the utility model overall structure figure;

Fig. 2 is the utility model control loop structural representation;

Fig. 3 is the utility model major loop winding diagram;

Fig. 4 is the utility model feedback and given signal sampling module circuit diagram;

Fig. 5 is that the utility model parameter arranges and the data memory module circuit diagram;

Fig. 6 is that the utility model pulse phase shifting triggers and the output module circuit diagram;

Fig. 7 is the phase plane presentation graphs of the utility model system running state;

Fig. 8 is the utility model membership function figure;

Fig. 9 is the utility model control device main program flow chart;

Figure 10 is that the utility model phase sequence detects and phase shift trigger module program flow diagram;

Figure 11 is the utility model signal sampling and processing module program flow diagram;

Figure 12 is the utility model controller architecture figure;

Figure 13 is the utility model control device adjustment module program flow diagram;

Figure 14 is the debugging module program flow diagram.

Embodiment

Referring to Fig. 1, the electrical network three-phase alternating voltage enters respectively corresponding treatment loop after major loop rectifier transformer and control loop synchrotrans.In control loop, power transformer secondary side voltage forms DC-voltage supply after treatment to microcomputer-based intelligent controller and pulse amplifying circuit.In addition, the three-phase alternating current that passes into control loop after synchrotrans also as synchronizing signal to determine the initial time of Trigger Angle.In major loop, line voltage is after the rectifier transformer conversion, obtain corresponding pulsating dc voltage by the thyristor rectifier loop under certain Trigger Angle effect, again via supplying with DC load after filtering, and by the direct current detecting element, direct voltage or direct current that rectification is obtained feed back to control loop.The feedback signal that the control loop utilization obtains is processed through Fuzzy PID and is converted to the gate pole that the pulse-triggered angle signal is applied to thyristor, thereby completes the closed-loop control to scr rectification circuit.In addition, control loop can feed back direct voltage (electric current) signal by detection, if feedback signal greater than predefined over-current adjusting value, judges, over current fault occurs, and the tripping overcurrent protection relay, thereby realizes overcurrent protection function.Three tunnel synchronizing signals are by the synchronizing signal end output of synchrotrans and main transformer, after clamping diode slicing and resistance current limliting, send into the input of comparator LM339, the square wave of LM339 output is through external interrupt INT0, INT1 and the P3.2 mouth of inverter input single-chip microcomputer, as the judgement signal that phase sequence detects, synchronously detects and phase shortage detects.During normal operation, the P0 mouth of single-chip microcomputer connects and draws the input that is input to latch 74HC174 after resistance.What control output latch is single-chip microcomputer P1.0 mouth, and it is connected with the CLR of 74HC174 after passing through the RC oscillating circuit that is comprised of 74HC14, realizes the control output to the latch pulse.Send into pulse transformer after the control output end process MOSFET power amplification of latch, voltage-stabiliser tube voltage stabilizing, diode slicing, produce pulse output.Main devices as the feedback sample link, the input signal of TLC1543 is between 0～5V, thereby for voltage signal (comprising feedback voltage UF and given signal SV) needs process dividing potential drop and amplitude limiting processing, need first pass through by LM339 linear amplifier circuit for current feedback signal, then input through amplitude limit again.Other links comprise that overcurrent protection, control mode are selected, data storage and house dog, digital regulated etc. comparatively close with contacting of single-chip microcomputer, usually directly are connected with the single-chip microcomputer pin and realize corresponding function.The intelligent control algorithm of controlling based on fuzzy that this device adopts has the advantages that not rely on system's mathematical models, thereby parameter time varying and the uncertainty of system had robustness preferably, can take into account Based Intelligent Control flexibly, strong adaptability and the high advantage of classical PID modification stability.

The power supply that adopts and synchronous signal acquisition module provide power supply and synchronizing signal for device.Wherein, power supply is realized voltage transitions by the 380/24V transformer, be converted to after rectification+5V ,+15V powers to each chip and device.The synchronization acquistion module realizes voltage transitions by synchrotrans 380/5V, and obtaining amplitude after current limliting, flat ripple, phase shift are processed is+5V that the cycle is that the rectangular pulse of 20ms is input in single-chip microcomputer as synchronous detection signal.

As shown in Figure 3, design circuit by a phase thyristor of common cathode group and common anode utmost point group one mutually thyristor consist of a controlled rectification circuit, the commutating circuit power supply is two alternate line voltages in element place.This circuit has three and can to the commutating circuit of load supplying, take turns to operate by the supply voltage phase sequence.

Each constantly all needs the conductings simultaneously of 2 thyristors in rectification circuit, form power to the load the loop, and two thyristors of conducting can not be the thyristor with 1 phase.Requirement to circuits for triggering is: the order of VT1-VT2-VT3-VT4-VT5-VT6 is pressed in the pulse of 6 thyristors, and phase place differs from 60 ° according to this; The pulse of common cathode group VT1, VT3, VT5 differs 120 ° according to this, and the phase place of common anode utmost point group VT4, VT6, VT2 also differs 120 ° according to this; Two brachium pontis up and down of same group, i.e. VT1 and VT4, VT3 and VT6, VT5 and VT2 pulse differ 180 °.Rectifier output voltage u _dOne cycle pulsation 6 times, the waveform of each pulsation is all identical, therefore this circuit is 6 pulse wave rectifier circuit.

In the present embodiment, the feedback with given signal sampling module, consisted of by A/D conversion chip TLC1543 and peripheral circuit thereof, its syndeton as shown in Figure 4, the analog quantity of sampling comprises given voltage (SV), feedback voltage (UF) and feedback current (IF).The sampled value of given voltage and feedback voltage through the series resistance dividing potential drop, is input to the input of TLC1543 at 0～10V.The feedback current sampled value is 0～75mV, must access the input of TLC1543 after the 74HC14 amplifier amplifies.

In the present embodiment, parameter setting and data memory module are made of chip X5045 and peripheral circuit thereof, its syndeton as shown in Figure 5, X5045 is the outer EEROM of sheet, after the device power down, can store the relevant data of adjusting, and prevents that the power down of parameter from losing.In addition, X5045 can design the house dog program, and requires MCU to feed dog every 200ns, otherwise concludes program fleet or MCU fault, and the MCU that resets, and can realize the Software Anti-interference function with this.

In the present embodiment, pulse phase shifting triggers and output module, consisted of by 74HC174 and peripheral circuit thereof, its syndeton as shown in Figure 6,74HC174 can latch the high-low level of single-chip microcomputer output as output latch.Send into the 74HC174 digitalphase-shifted trigger and carry out anti-phase triggering, promote MOSFET and carry out power amplification, the output of this device is connected to the armature winding of pulse transformer after voltage-stabiliser tube and diode voltage stabilizing, thereby produces pulse output.

In the present embodiment, digital voltage and current regulating module then through corresponding Fuzzy PID or manually follow the tracks of and regulate, obtain Trigger Angle α value, and the α value are assigned to timer after the A/D sampling of completing analog quantity is converted into digital quantity and sends into single-chip microcomputer.According to the synchronizing signal that inspection obtains, the time-delay of beginning Trigger Angle then accesses digitalphase-shifted trigger as pulse output through pull-up resistor with the P0 mouth, forms six tunnel output pulses.For ease of instruction cycle calculating, adopt the 12M crystal oscillator to provide clock for system.

In the present embodiment, detect indication and parameter tuning function and comprise that mainly over-current adjusting, decompress(ion) adjust and synchronization settings.Detecting indication and be the Pulse-trigger control system realizes from the important embodiment that detects with self-diagnostic function.This control system can detect and instruction program 8 kinds of states, 5 kinds of faults, adopts modular design method to divide state-detection and the large module of faulty indication two.

In the present embodiment, design in control loop automatically and manual two kinds of control modes.Wherein, automatically control and adopt fuzzy PID control method, the method can according to the size of controlling operating mode auto-adjustment control parameter, possess good control performance.Fuzzy control rule is as follows:

Can be expressed as respectively e (k) and De (k) after the departure e (t) of this device output dc voltage (electric current) and micro component De (t) discretization.As shown in Figure 4, the state of system's output voltage (electric current) can represent with the point on this phase plane, and the form of being write as coordinate is:

M(k)=[e(k),K _D·De(k)] （1）

In formula (1): K _D0, the proportionality coefficient between expression e (k) and De (k).As shown in Figure 1, at the initial point place, the error of output voltage (electric current) is 0, and error rate is also 0, and namely output voltage this moment (electric current) is being just ideal value.Therefore, control target for current output voltage (electric current) state M (k) is moved back into the phase plane origin of coordinates.The phase plane of system running state represents referring to Fig. 7,

Rule 1: when phase plane parameter θ (k) is in [0 °, 90 °], should reduce pulse-triggered angle α, thereby increase output dc voltage (electric current);

Rule 2: when phase plane parameter θ (k) is in [180 °, 270 °], should increase pulse-triggered angle α, thereby reduce output dc voltage (electric current);

Rule 3: when phase plane parameter θ (k) is in [90 °, 180 °] or [270 °, 360 °], determined the output valve of FUZZY ALGORITHMS FOR CONTROL module by membership function in Fig. 5, membership function is referring to Fig. 8;

Rule 4: the fuzzy control output valve is proportional to the distance L (k) between state point M (k) and initial point.

In fuzzy rule, θ (k) is by deviation e (k) and the definite system running state of deviation ratio De (k); Be polar form with the state representation of output voltage (electric current), thereby be convenient to the fuzzy logic control Rule Extraction:

$\left\{\begin{array}{c}L\left(k\right)=\sqrt{{e\left(k\right)}^2+{(K_D\·\mathrm{De}\left(k\right))}^2}\\ \mathrm{\θ}\left(k\right)=\arctan \frac{K_D\·\mathrm{De}\left(k\right)}{e\left(k\right)}\end{array}\right.---\left(2\right)$

Fig. 8 has provided the membership function a of reflection increase and decrease control degree ₁(θ) with membership function a ₂(θ), analyzing this figure has as can be known:

P(θ(k))+N(θ(k))=1 （3）

Above-mentioned four rules are analyzed, and the expression formula that can sum up output variable is:

$U\left(k\right)=\frac{P\left(\mathrm{\θ}\left(k\right)\right)-N\left(\mathrm{\θ}\left(k\right)\right)}{P\left(\mathrm{\θ}\left(k\right)\right)+N\left(\mathrm{\θ}\left(k\right)\right)}G{\left(k\right)U}_{\max }---\left(4\right)$

Formula (3) is brought in formula (4), has:

U(k)=[1-2N(θ(k))]G(k)U _max （5）

In formula (5): U _maxThe maximum of expression fuzzy control output valve is chosen as 1.2*Ue, and Ue is rated voltage; G (k) is the gain coefficient of fuzzy controller output valve, and its definition is as follows:

$G\left(k\right)=\left\{\begin{array}{cc}\frac{L\left(k\right)}{L_S}& L\left(k\right)\≤L_S\\ 1& L\left(k\right)>L_S\end{array}\right.---\left(6\right)$

In formula (6): L _SExpression is corresponding to U _maxThe state point of output voltage (electric current) and the distance between initial point, relevant with the AD conversion accuracy.Can be found out the advantages such as this control method has calculating simplicity, the realization of being convenient to programme by formula (5) and formula (6).

In addition, relative phase shift system is adopted in the output pulse of this control system, at manual mode and automated manner, the phase shift range of the Trigger Angle that calculates is limited in 0～150 ° by the timer assignment, thereby has effectively prevented misleading of thyristor.

In major cycle, peripheral hardware sends interrupt signal by interrupt identification to CPU, and system controls main program flow as shown in Figure 9, and each subprogram major function is summarized as follows:

Initialization subroutine: program initialization comprises that single-chip microcomputer powers on and rear X5045 carried out read operation, the verification operational factor of being correlated with, and timer counter is carried out initialization etc.

Pulse phase shifting and triggering: this module is by timer T0 and the collaborative functions such as phase sequence self-adaption function, default-phase protection function, synchronization signal detection function, pulse shaping and phase shift that realize of timer T1.

Sample conversion: the sampling module take TLC1543 as core is converted into digital quantity with the analog quantity of sample port, and then it is sent into single-chip microcomputer in the sampling time, processes and calculates to carry out data.

Regulating and controlling: after the given signal SV that obtained by sampling and feedback signal UF/IF are carried out filtering, carry out computing according to manual/auto (fuzzy PID regulation) control mode, after the certain amplitude limiting processing of result process that obtains, assignment is to phase shift Trigger Angle timer T1.

Detect and parameter tuning: the Pulse-trigger control system can carry out from detecting and indication 8 kinds of states of this system, 5 kinds of faults, and can be to overcurrent parameter UH, cut and press parameter UJ and Shifting Phase of Rectifier Transformer hour number ZD adjust.

Protection and faulty indication: as previously mentioned, to the problem that occurs in System self-test survey process, carry out faulty indication.

It is one of kernel program of microcontroller that pulse phase shifting triggers, and this program can also realize synchronous measuring ability and phase sequence self-adaption function.Trailing edge INT2 by external interrupt INT0, INT1 and the simulation of P3.0 mouth passes through phase sequence is detected, and realizes synchronously judging and the phase sequence judgement; According to the result that phase sequence detects, trigger different pulse train by timer T0, T1, realize pulse-triggered function and phase sequence self-adaption function.The pulse phase shifting function depends on that timer T0 previous pulse regularly is poor with the timing between an adjacent rear pulse, and T0 carries out timing to Trigger Angle due to the employing Special timer, and such phase shift system is accurate, easy.

After realizing that by external interrupt phase sequence detects, be the key of phase shift trigger design to the accurate timing of trigger impulse.This paper adopts timer T0 realize pulse phase shifting and trigger and control, and concrete grammar is as follows:

Six tunnel pulses output-controlled in the high-low level sequential of P1.0 and P0.1～P0.6, above-mentioned signal can be divided into two groups by positive backward as can be known, each six kinds of states.Through oppositely amplifying, during positive sequence, six kinds of states for sequentially pin corresponding to triggering signal set high, and sequentially set low previous pin, and the time-delay of every kind of state is 60 °, and during backward, the triggering state is just the opposite.The flow process of phase sequence detection and phase shift trigger as shown in figure 10.

The data fetch program of A/D chip is that the work schedule according to TLC1543 designs.TLC1543 single channel sampling flow chart, its course of work is broadly divided into two cycles, i.e. access cycle and sampling period.In access cycle, by corresponding channel number is input to TLC1543, thereby corresponding passage is selected.Realize the AD conversion to respective channel in the sampling period process.The operating state of TLC1543 is controlled by CS, to realize enabling and forbidding of sampling.When its work, CS must set low.When if CS is high level, I/OCLOCK, ADDRESS are under an embargo, and DATA OUT is high-impedance state simultaneously.

TLC1543 data acquisition subprogram flow process as shown in figure 11.This program is by the write operation of cpu access address, send A/D conversion starting impulse, after starting, whether CPU inquiry A/D conversion finishes, in case finish CPU by the read operation reading numerical values to channel address, it should be noted that after TLC1543 starts, from the A/D conversion timing sequence as can be known EOC 300ns after starting impulse just become high level.Also to carry out corresponding filtering to the result that reads and process, have influence on the precision of sampling to prevent impact by factors such as interference the existing of data that make the mistake.

The principle of Fuzzy PID is the robustness of taking into account FUZZY ALGORITHMS FOR CONTROL obtaining dynamic response faster, and the stability of classical PID control algolithm is to obtain higher degree of regulation.FUZZY ALGORITHMS FOR CONTROL and classical PID control algolithm are combined, switch by the deviation size of feedback quantity., enable FUZZY ALGORITHMS FOR CONTROL output is regulated during greater than certain predefined value when deviation; Otherwise, adopt the classical PID algorithm to calculate to obtain output valve.The structure of its controller is controlled output y (k), feedback deviation e (k) and is 0 during initialization as shown in figure 12 in figure.

Commutation system is equivalent to the ratio amplifying element, and the relation of approximately linear is arranged between feedback voltage UF that over-sampling obtains and output pulse.The adjusting program flow diagram of control system switches the regulating and controlling method that needs employing as shown in figure 13 by the AMC signal.For improving the time performance of fuzzy PID algorithm, to deposit in EEROM by parameter tuning and the pid parameter that debugging obtains, during pending automatic control program, directly read and get final product, the parameter that need adjust comprises overcurrent value UH, cuts pressure value UJ, hour number ZD, six kinds of Proportional coefficient K P, integral coefficient KI, differential coefficient KD.

After fuzzy calculates, substitute cosine relation with subtracting the formula relation, namely first deduct y (k) with a fixed value, then carry out ratio and amplify, this as Time delay time α, can be obtained reasonable range of linearity control equally.

The Pulse-trigger control system can detect and instruction program 8 kinds of states, 5 kinds of faults, adopts modular design method to divide two large modules to design.Wherein, detection module Check comprises 8 submodules, is respectively debugging mode CHK_TS, over-current state CHK_OC, pulse blocking state CHK_BK, power phase shortage state CHK_PH, U4 malfunction CHK_U4, parameter error status CHK_PR, U1 malfunction CHK_U1 and normal operating condition CHK_WK.Accordingly, DIS_VL2 is also by 8 sub-module compositions in the state indication, and they are respectively debugging mode VL2_TS, over-current state VL2_OC, pulse blocking state VL2_BK, power phase shortage state VL2_PH, U4 malfunction VL2_U4, parameter error status VL2_PR, U1 malfunction VL2_U1 and normal operating condition VL2_WK.The large sequence of modules of Check and DIS_VL2 two is carried out and is judged by corresponding Status Flag, corresponding Status Flag is that Flag_TS, Flag_OC, uchar Flag_BK, Flag_PH, Flag_U4, Flag_U1 and Flag_PR initialization are set to zero, puts 1 when entering corresponding state.Wherein, the program flow diagram of CHK_TS submodule as shown in figure 14.

Claims (5)

1. a thyristor rectifier microcomputer-based intelligent control circuit, is characterized in that, comprises major loop and control loop, and described major loop comprises power supply and the scr rectification circuit of series connection successively; Described control loop comprises power supply and synchronous signal acquisition module, feedback and given signal sampling module, pulse phase shifting triggering and output module and digital voltage and current regulating module; Described digital voltage is connected with given signal sampling module communication with feedback with output module with synchronous signal acquisition module, pulse phase shifting triggering with power supply respectively with current regulating module, power supply and synchronous signal acquisition module are connected to pulse phase shifting and trigger and output module, feedback is connected major loop with given signal sampling module by the direct current detection module, and pulse phase shifting triggers and the output of output module is connected to major loop.

2. a kind of thyristor rectifier microcomputer-based intelligent control circuit according to claim 1, it is characterized in that, the scr rectification circuit of described major loop comprises rectifier transformer and the three-phase commutation bridge of series connection successively, described rectifier transformer connects power supply, and three-phase commutation bridge connects the output of pulse phase shifting triggering and output module.

3. a kind of thyristor rectifier microcomputer-based intelligent control circuit according to claim 1, it is characterized in that, described power supply and synchronous signal acquisition module comprise synchrotrans, the D.C. regulated power supply output module, synchronous circuit, phase sequence self-adaption circuit and open-phase protection circuit, the input of described synchrotrans connects power supply, output is connected to synchronous circuit and D.C. regulated power supply output module, the output of D.C. regulated power supply output module is connected to digital voltage and current regulating module, the output of synchronous circuit is connected to respectively phase sequence self-adaption circuit and open-phase protection circuit, the output of open-phase protection circuit is connected to the phase sequence self-adaption circuit, the output of phase sequence self-adaption circuit is connected to pulse phase shifting and triggers and output module.

4. a kind of thyristor rectifier microcomputer-based intelligent control circuit according to claim 1; it is characterized in that; also comprise overcurrent protection relay and Control output circuit; described overcurrent protection relay is arranged at the output of power supply; the control end of described Control output circuit connects respectively power supply and synchronous signal acquisition module and digital voltage and current regulating module, and the output of Control output circuit connects the control end of overcurrent protection relay.

5. a kind of thyristor rectifier microcomputer-based intelligent control circuit according to claim 1, it is characterized in that, the I/O circuit interface and parameter setting and the data storage module that also comprise series connection successively, the output of described parameter setting and data storage module be linking number word voltage and current regulating module and pulse phase shifting triggering and output module respectively.

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