CN201364850Y

CN201364850Y - Cylindrical linear induction motor control device of high-voltage circuit breaker

Info

Publication number: CN201364850Y
Application number: CNU2008202321473U
Authority: CN
Inventors: 刘爱民; 李家珏; 李永祥; 林莘; 徐建源
Original assignee: Shenyang University of Technology
Current assignee: Shenyang University of Technology
Priority date: 2008-12-26
Filing date: 2008-12-26
Publication date: 2009-12-16
Anticipated expiration: 2018-12-26

Abstract

The utility model relates to a cylindrical linear induction motor control device of a high-voltage circuit breaker. The spindle of a cylindrical linear induction motor is respectively connected with the moving contact of a high-voltage circuit breaker, a power grid failure detection unit and a control unit, and the control unit is respectively connected with an inverter unit and the power grid failure detection module. The utility model improves the closing/opening capacity of the high-voltage circuit breaker, prolongs the mechanical and electrical service life of the high-voltage circuit breaker, and enhances the reliability. The reverse actuating force can be generated in a control method to replace the function of the traditional buffer device, thereby achieving the purpose of simplifying the mechanism.

Description

A kind of primary cut-out cylindrical linear induction motor control device

Technical field

The utility model relates to the power transmission and transforming equipment technical field, be particularly related to a kind of primary cut-out cylindrical linear induction motor control device, the cylindrical linear induction motor operating mechanism that uses and the control of moving contact in high voltage breaker movement travel characteristic are used for matching with high voltage switchgear.

Background technology

Traditional high-voltage breaker operation mechanism mainly is made up of several parts such as connecting rod, snap close and energy supply systems, link is many, the cumulative movement tolerance is big and response slowly, poor controllability, efficient be low.Response time is generally wanted a few tens of milliseconds.Dispersiveness operate time of these operating mechanisms is also bigger in addition, for AC controling signal even greater than 10ms, even employing dc operation, the dispersiveness of operate time is also at Millisecond, and can only realize the circuit breaker action request, therefore can not realize adjusting and control to the actuating process, the moving contact kinetic characteristic of above-mentioned operating mechanism mesohigh circuit breaker is difficult to the level that reaches desirable.

Summary of the invention

At the problem that exists in the existing high-voltage switch gear actuating technology, the utility model proposes and a kind ofly when some temporary derangements take place electrical network, drive primary cut-out and come omnibearing control device that electric power system is effectively protected by cylindrical linear induction motor.

This device comprises primary cut-out, cylindrical linear induction motor, wherein the main shaft of cylindrical linear induction motor is connected with control unit with moving contact in high voltage breaker, electric network fault detecting unit respectively, and control unit connects inversion unit and electric network fault detecting unit respectively.

Inversion unit comprises three phase mains, uncontrollable diode bridge rectifier module, the IPM module, first resistance (Ron), switch, second resistance (R1), divider resistance (R2), first electric capacity (C1), second electric capacity (C2), the 3rd resistance (Rb), the IGBT element, diode and Hall element, wherein three phase mains links to each other with uncontrollable diode bridge rectifier module, realize that three phase mains is converted into the required DC power supply of IPM, uncontrollable diode bridge rectifier module DC side positive pole connects the common collector of IPM module through first resistance (Ron), uncontrollable diode bridge rectifier module DC side negative pole connects the common emitter of IPM module, wherein first resistance (Ron) and switch in parallel, the control signal of switch terminates on the pin set in the dsp chip initialization module, output control command when cylindrical linear induction motor moves, switch closure short circuit first resistance (Ron), first branch road (I) that is composed in series by second resistance (R1) and divider resistance (R2) in parallel between the common collector of IPM module and common emitter, second branch road (II) that is composed in series by first electric capacity (C1) and second electric capacity (C2) and the 3rd branch road of forming by the 3rd resistance (Rb) and IGBT element connected in series (III), wherein the effect of first resistance (Ron) is before the cylindrical linear induction motor operation, make filtering first electric capacity (C1), second electric capacity (C2) has a less charging current in advance, avoid impacting because of the charging of capacitor instantaneous large-current produces, protection rectification module and filter capacitor, the input of the over-voltage detection circuit in first branch road (I) in the exit of divider resistance (R2) and the control unit links to each other; When the direct current press pump rises in the circuit, after this moment, dsp chip arrived by voltage detecting, the discharge drive circuit of controlling in the 3rd branch road (III) drives the IGBT conducting, power consumption on the 3rd resistance (Rb), the anode of first electric capacity (C1) links to each other with the common collector of IPM module in second branch road (II), and the common emitter of IPM module links to each other with the anode of second electric capacity (C2); In the 3rd branch road (III), be in parallel with diode between the emitter and collector of IGBT element, the base stage of IGBT element connects the output of the discharge drive circuit in the control unit; The input of IPM module connects the output of the isolated drive circuit of the IPM in the control unit, and the three phase terminals process Hall element of IPM module output links to each other with the level shifting circuit input in the control unit.

Control unit comprises over-voltage detection circuit; dsp chip; the discharge drive circuit; the isolated drive circuit of IPM; level shifting circuit; rotary encoder; simulator and upper PC; wherein the output of over-voltage detection circuit links to each other with the pin that sets about over-voltage protection function in the dsp chip protection module; the input of discharge drive circuit connects the pin that the dsp chip protection module sets; the input of the isolated drive circuit of IPM links to each other with six output pins of PWM1～PWM6 on the dsp chip; the output of level shifting circuit links to each other with analog input port on the dsp chip; level shifting circuit is that the signal of Hall element output is converted into the signal that DSP accepts; the code-disc rotating shaft of rotary encoder is connected with cylindrical linear induction motor by truckle; realize that rotary encoder carries out the detection of speed and position to the motor in the utility model; the A of rotary encoder; QEP1 on B phase output terminal and the dsp chip; the QEP2 port links to each other; calculate by the DSP speed measurement module, dsp chip links to each other with upper PC by simulator.

The electric network fault detecting unit comprises the electric network fault testing circuit, and the electric network fault testing circuit links to each other with the pin that dsp chip electric network fault detection module in the control unit sets.

The control of the utility model by cylindrical linear induction motor help improving circuit breaker close close, connecting-disconnecting function, and the machinery of circuit breaker, electrical endurance and reliability.In addition, can allow mechanism produce the effect that reverse actuating force replaces the buffer unit of traditional operating mechanism, reach the purpose that simplifies the internal structure of an organization by control.

Description of drawings

Fig. 1 is that mechanism model connects sketch in the utility model;

Fig. 2 is the utility model cylindrical linear induction motor control system structure chart;

Fig. 3 is the application process control program flow chart of the utility model primary cut-out cylindrical linear induction motor control device;

Fig. 4 is the application process step 1 control program flow chart of primary cut-out cylindrical linear induction motor control device;

Fig. 5 is the application process step 3 control program flow chart of primary cut-out cylindrical linear induction motor control device;

Fig. 6 (a) is the utility model rotary encoder;

Fig. 6 (b) is the output mode of the utility model rotary encoder;

Fig. 7 is the utility model RS-232 and TMS320F2812 hardware connection layout;

The rate curve of moving contact when Fig. 8 (a) is the utility model combined floodgate

The rate curve of moving contact when Fig. 8 (b) is the utility model separating brake;

Fig. 9 is the utility model level shifting circuit schematic diagram;

Figure 10 is the utility model electric network fault testing circuit schematic diagram;

Figure 11 is the utility model over-voltage detection circuit schematic diagram;

Figure 12 is the utility model discharge drive circuit schematic diagram;

Among Fig. 1: 1 inversion unit, 2 control units, 3 electric network fault detecting units, 4 cylindrical linear induction motors, 5 primary cut-outs;

Among Fig. 2: 6 three phase mains, 7 uncontrollable diode bridge rectifier modules, 8IPM module, 29 Hall elements, 9 over-voltage detection circuits, 10 discharge drive circuits, the isolated drive circuit of 11IPM, 12DSP chip, 13 level shifting circuits, 14 rotary encoders, 15 electric network fault testing circuits, 16 simulators, 17 upper PCs;

Among Fig. 7: 18 light sources, 19 optically focused sources, 20 optical discs, 21 light trap plates, 22 photoelectric tubes, 23 shapings amplification, 24 numerical display devices, 25 truckles, 26 compartments, 27 cracks, 28 code-disc rotating shafts.

Embodiment

The utility model dsp chip model is TMS320F2812, adopt IPM interface specialized high-speed model HCPL-4504 photoelectrical coupler in the IPM isolated drive circuit, discharge drive circuit model is PM300DSA120, the Hall element model is LT10-C, it is E6B2-CWZ6C that rotary encoder adopts the incremental rotary encoder model of OMRON, and DSP and upper PC carry out the communication transmission by the chip for driving SP3223EEY that meets rs-232 standard.

This device comprises primary cut-out 5, cylindrical linear induction motor 4 as shown in Figure 1, the main shaft of cylindrical linear induction motor 4 is connected with primary cut-out 5 moving contacts, electric network fault detecting unit 3 and control unit 2 respectively, and control unit 2 connects inversion unit 1 and electric network fault detecting unit 3 respectively.

Inversion unit 1 comprises three phase mains 6 as shown in Figure 2, uncontrollable diode bridge rectifier module 7, IPM module 8, first resistance (Ron), switch, second resistance (R1), divider resistance (R2), first electric capacity (C1), second electric capacity (C2), the 3rd resistance (Rb), the IGBT element, diode and Hall element 29, wherein three phase mains 6 links to each other with uncontrollable diode bridge rectifier module 7, uncontrollable diode bridge rectifier module 7 DC side positive poles connect the common collector of IPM module 8 through first resistance (Ron), uncontrollable diode bridge rectifier module 7 DC side negative poles connect the common emitter of IPM module 8, wherein first resistance (Ron) and switch in parallel, the control signal of switch terminates on the pin set in dsp chip 12 initialization modules, first branch road (I) that is composed in series by second resistance (R1) and divider resistance (R2) in parallel between the common collector of IPM module 8 and common emitter, second branch road (II) that is composed in series by first electric capacity (C1) and second electric capacity (C2) and the 3rd branch road of forming by the 3rd resistance (Rb) and IGBT element connected in series (III), the input of the over-voltage detection circuit 9 in first branch road (I) in the exit of divider resistance (R2) and the control unit 2 links to each other; The anode of first electric capacity (C1) links to each other with the common collector of IPM module 8 in second branch road (II), and the common emitter of IPM module 8 links to each other with the anode of second electric capacity (C2); In the 3rd branch road (III), be in parallel with diode between the emitter and collector of IGBT element, the base stage of IGBT element connects the output of the discharge drive circuit 10 in the control unit 2; The input of IPM module 8 connects the output of the isolated drive circuit 11 of the IPM in the control unit 2, and the three phase terminals process Hall element 29 of IPM module 8 outputs links to each other with level shifting circuit 13 inputs in the control unit 2.

Control unit 2 comprises over-voltage detection circuit 9 as shown in Figure 2; dsp chip 12; discharge drive circuit 10; the isolated drive circuit 11 of IPM; level shifting circuit 13; rotary encoder 14; simulator 16 and upper PC 17; wherein the output of over-voltage detection circuit 9 links to each other with the pin that sets about over-voltage protection function in dsp chip 12 protection modules; the input of discharge drive circuit 10 connects the pin that dsp chip 12 protection modules set; the input of the isolated drive circuit 11 of IPM links to each other with six output pins of PWM1～PWM6 on the dsp chip 12; the output of level shifting circuit 13 links to each other with analog input port on the dsp chip 12; rotary encoder 14 code-disc rotating shaft 28 as shown in Figure 7 is connected with cylindrical linear induction motor 4 by truckle 25; the A of rotary encoder 14; QEP1 on B phase output terminal and the dsp chip 12; the QEP2 port links to each other, and dsp chip 12 links to each other with upper PC 17 by simulator 16.

Electric network fault detecting unit 3 comprises electric network fault testing circuit 15 shown in Fig. 2, Fig. 8 (a) and Fig. 8 (b), electric network fault testing circuit 15 links to each other with the pin that dsp chip 12 electric network fault detection modules in the control unit 2 set.

The application process of primary cut-out cylindrical linear induction motor control device as shown in Figure 3, as follows:

Step 1, by the electric network fault detecting unit line voltage and the current signal that records fed back to control unit, by control unit acquisition speed curve;

Step 2, by control unit control inversion unit, drive the cylindrical linear induction motor motion by inversion unit again;

Step 3, control moving contact in high voltage breaker by the motion of cylindrical linear induction motor main shaft and open/close a floodgate motion by rate curve.

Wherein step 1 feeds back to control unit by the electric network fault detecting unit with line voltage and the current signal that records, by the control method of control unit acquisition speed curve, as follows:

Step 1, control system bring into operation, and by upper PC dsp chip are downloaded, and the CPU of dsp chip calls the SCI communication module and comes communications protocol is set; Control system energising operation, CPU calls initialization module each port of dsp chip and timer is carried out the initialization setting;

Whether the CPU detection of grid fault detection module of step 2, dsp chip has interruption, and when the electric network fault testing circuit detected electric network fault, application was interrupted entering step 3, when fault-free is interrupted, returns step 2.

Step 3, CPU check whether overvoltage signal is arranged, if the step 7 of commentaries on classics is arranged, if do not change step 4.

Step 4, dsp chip are judged fault type at detection signal, determine that by inquiry fault type and speed chart pairing rate curve is shown in Fig. 8 (a) and Fig. 8 (b) again, and as velocity setting, if this moment, three phase short circuit fault appearred in electrical network, CPU calculates the speed given curve of three phase short circuit fault type;

Step 5, dsp chip calculates pairing rate curve by inquiry fault type and speed chart and compares with the motor speed detection signal shown in Fig. 8 (a) and Fig. 8 (b), dsp chip calls speed measurement module, and to calculate speed regulator given, and then call the PI adjustment module successively by dsp chip, the transform vector module, the current sample module, magnetic linkage angle computing module, the space vector of voltage module is carried out the control algolithm computing, calculate after the SVPMWM duty ratio, the SVPWM control signal that generates is delivered to the IPM module by pin PWM1～PWM6;

Step 6, form the needed elementary voltage signal unshakable in one's determination of cylindrical linear induction motor by the inversion of IPM module, thereby drive the cylindrical linear induction motor action, drive moving contact in high voltage breaker by cylindrical linear induction motor again, moving contact is moved according to rate curve;

Step 7, link to each other with overvoltage crowbar by divider resistance (R2) in the inverter circuit DC side; when DC side pump occurs and rises overvoltage; overvoltage crowbar is given the dsp chip high level signal; the application of dsp chip protection module is interrupted, and dsp chip generates the SVPWM modulation signal and sends the discharge drive circuit to then.

The main function of the module that above-mentioned steps is quoted is:

Described initialization module, be used to be provided with system clock, set the serial port form, and allow serial port to receive interruption, the various I/O interfaces of initialization, each timer of initialization is set to full comparison pattern, and Dead Time is set, the A/D initialization of sampling, select sampling channel, the analog input port is emptied, the initialization assignment of the corresponding memory cell of each variable; Described SCI communication module is used for sending character according to PC, and dsp chip receives data, when the identifier that receives is " 1 ", rotary speed setting value then is set, when the identifier that receives is " 2 ", d shaft current PI parameter then is set, when the identifier that receives is " 3 ", the PI parameter of q shaft current then is set, when the identifier that receives is " 4 ", the PI parameter of rotational speed regulation then is set, when the identifier that receives is " 5 ", receiving system operation sign position, the operation of start-up system when this position is " 1 "; Described current sample module, the signal that is used for being input to by level shifting circuit the A/D mouth of dsp chip is handled; Described circuit protection module is used for judging whether overvoltage according to accepting the overvoltage detection signal, if overvoltage makes it protect circuit just to the given control signal of discharge drive circuit; Described speed measurement module is used to enter servo interrupt, motor velocity signal is read, and with given ideal signal relatively, given speed adjuster input variable; Described PI adjustment module is used to finish speed regulator and current regulator function; Described transform vector module is used to carry out coordinate transform, the regulation algorithm; Described magnetic linkage angle computing module is used to finish indirect magnetic linkage angle and calculates, and calculates controlled quentity controlled variable in conjunction with transform vector; Described space vector of voltage module is used for determining the SVPMWM duty ratio according in conjunction with controlled quentity controlled variable; Described electric network fault detection module, be used for signal, come the failure judgement type, because every kind of corresponding a kind of rate curve of fault type according to electrical network testing circuit detection of grid fault, therefore corresponding with fault type that enrolls in advance and speed chart, provide corresponding rate curve then.

Claims

1, a kind of primary cut-out cylindrical linear induction motor control device, comprise primary cut-out, cylindrical linear induction motor, it is characterized in that: the main shaft of cylindrical linear induction motor is connected with control unit with moving contact in high voltage breaker, electric network fault detecting unit respectively, and control unit connects inversion unit and electric network fault detecting unit respectively.

2, primary cut-out cylindrical linear induction motor control device according to claim 1, it is characterized in that described inversion unit comprises three phase mains, uncontrollable diode bridge rectifier module, the IPM module, first resistance (Ron), switch, second resistance (R1), divider resistance (R2), first electric capacity (C1), second electric capacity (C2), the 3rd resistance (Rb), the IGBT element, diode and Hall element, wherein three phase mains links to each other with uncontrollable diode bridge rectifier module, uncontrollable diode bridge rectifier module DC side positive pole connects the common collector of IPM module through first resistance (Ron), uncontrollable diode bridge rectifier module DC side negative pole connects the common emitter of IPM module, wherein first resistance (Ron) and switch in parallel, the control signal of switch terminates on the pin set in the dsp chip initialization module, first branch road (I) that is composed in series by second resistance (R1) and divider resistance (R2) in parallel between the common collector of IPM module and common emitter, second branch road (II) that is composed in series by first electric capacity (C1) and second electric capacity (C2) and the 3rd branch road of forming by the 3rd resistance (Rb) and IGBT element connected in series (III), the input of the over-voltage detection circuit in first branch road (I) in the exit of divider resistance (R2) and the control unit links to each other; The anode of first electric capacity (C1) links to each other with the common collector of IPM module in second branch road (II), and the common emitter of IPM module links to each other with the anode of second electric capacity (C2); In the 3rd branch road (III), be in parallel with diode between the emitter and collector of IGBT element, the base stage of IGBT element connects the output of the discharge drive circuit in the control unit; The input of IPM module connects the output of the isolated drive circuit of the IPM in the control unit, and the three phase terminals process Hall element of IPM module output links to each other with the level shifting circuit input in the control unit.

3; primary cut-out cylindrical linear induction motor control device according to claim 1; it is characterized in that described control unit comprises over-voltage detection circuit; dsp chip; the discharge drive circuit; the isolated drive circuit of IPM; level shifting circuit; rotary encoder; simulator and upper PC; wherein the output of over-voltage detection circuit links to each other with the pin that sets about over-voltage protection function in the dsp chip protection module; the input of discharge drive circuit connects the pin that the dsp chip protection module sets; the input of the isolated drive circuit of IPM links to each other with six output pins of PWM1～PWM6 on the dsp chip; the output of level shifting circuit links to each other with analog input port on the dsp chip; the code-disc rotating shaft of rotary encoder is connected with cylindrical linear induction motor by truckle; the A of rotary encoder; QEP1 on B phase output terminal and the dsp chip; the QEP2 port links to each other, and dsp chip links to each other with upper PC by simulator.

4, primary cut-out cylindrical linear induction motor control device according to claim 1, it is characterized in that described electric network fault detecting unit comprises the electric network fault testing circuit, the electric network fault testing circuit links to each other with the pin that dsp chip electric network fault detection module in the control unit sets.