CN205644142U - Controlling means is selected to accurate angle of electronic type intelligence - Google Patents

Abstract

The utility model discloses a controlling means is selected to accurate angle of electronic type intelligence. The utility model has the characteristics of high performance, high reliability, compact, non -maintaining and intelligent etc. Technique, the angle of flow that comes inverse parallel thyristor between control source and the load with single chip microcomputer, can 0 180 suitable angle is closed a floodgate. The utility model provides an option switching -on device should be able to adapt to high -frequency operation the scene, have higher overload capacity, very strong electromagnetic compatibility can and lower self loss. The utility model discloses in the aspect of realizing the high reliability, realize accurate control function and quick fault protection function through high -end digital processing technique, realize strong communication reliability under embedded digital platform. Additionally, the utility model discloses it is miniaturized that usable built -in bypass contactor's mode and advance material, technology reach the product, and electroless minute of arc closes and makes its unit volume current ratio lead over the like product.

Description

A kind of electronic type intelligent accurate angle Selection controls device

Technical field

This utility model relates to a kind of low-voltage electrical apparatus intelligent measurement instrument.

Background technology

In network system, chopper is the most all random and not in the initial phase angle of Guan Bi instantaneous system voltage and current Determine.This, not only on the equipment in network system itself and safeguard unfavorable (affecting the insulation of equipment, life-span), also can affect electricity Net system voltage stability, the misoperation behavior of induction relay protection, increase maintenance activity amount and maintenance cost.At inductive load When (no-load transformer, shunt reactor etc.) closes a floodgate, if chopper conjunction phase place is improper, it will produce the biggest shoving and cause wink Between voltage reduce, cause system voltage fluctuation and protective relay misoperation；At capacitive load (unloaded transmission line of electricity, capacitor Group etc.) overvoltage when closing a floodgate and shove and cause contact of breaker melting welding, scaling loss, the electric power shoved may part of damage even Insulation harm is caused to current transformer and current-limiting reactor.So understanding the chopper combined floodgate performance when out of phase to electricity Net system and switchgear are most important.

For solving the different grades of short circuit currents such as circuit breaker short circuit test current 15KA, 30KA, 50KA, 120KA, at present Phase selection device on market all uses mechanical type form, is mainly made up of switch and control chamber two large divisions, and switch employing sets up Meter, with six vacuum interrupter parallel operations, device volume is big, control accuracy is poor≤± 3.6 °, deciliter time vibrations greatly, reliability Difference, plant maintenance workload greatly, periodically need to safeguard.

Summary of the invention

The purpose of this utility model is to provide the circuit breaker short circuit current testing device of a kind of accurate phase selection, is used for examining Survey and record chopper break and short action, complete to meet all examinations of the circuit breaker of GB14048.2 standard Test.

In order to achieve the above object, the technical solution of the utility model there is provided a kind of electronic type intelligent accurate angle choosing Selecting control device, power supply is connected with load circuit by loop of power circuit, loop of power circuit include antiparallel IGCT and with for Control turn on thyristors, the thyristor trigger board of cut-off, it is characterised in that include that two paths of signals collecting unit, a road signal are adopted Between collection unit access power loop and load circuit, between another signal gathering unit access power loop, road and power supply, two Road signal gathering unit connects respective signal processing unit, and two paths of signals processing unit is all connected with host CPU, host CPU output arteries and veins Punching is touched and is signaled to fiber optic distribution panels, and fiber optic distribution panels is connected with thyristor trigger board via optical fiber.

Preferably, described host CPU also sets up communication with host computer.

Preferably, described host CPU connects liquid-crystal controller.

Preferably, described signal processing unit includes that the amplifier for being pruned by the negative half period of sinusoidal signal processes circuit, Amplifier processes the input of circuit and is connected with described signal gathering unit, and amplifier processes the outfan of circuit and is connected to formation side The photoswitch switch unit of ripple.

This utility model has high-performance, high reliability, compact, non-maintaining and intelligent etc. technical characterstic, is to use One chip microcomputer controls the angle of flow of anti-parallel thyristor between power supply and load, can close with 0-180 ° of suitable angle Lock.The option closing device that this utility model provides should be able to adapt to the scene of high frequencies of operation, have higher overload capacity, very Strong Electro Magnetic Compatibility and relatively low own loss.This utility model, in terms of realizing high reliability, passes through high end digital Treatment technology realizes controlling accurately function and quick failure protection function, realizes strong leading under embedded digital platform Letter reliability.It addition, this utility model may utilize mode and the material of advanced person of built in bypass catalyst, that technique reaches product is little Type, makes its unit volume current ratio lead over like product without electric arc deciliter.

Accompanying drawing explanation

Fig. 1 is hardware block diagram of the present utility model；

Fig. 2 is that voltage and current signal of the present utility model processes circuit block diagram；

Fig. 3 is flow chart of the present utility model；

Fig. 4 is sequential chart of the present utility model, and in figure, A is 30 °, and B is 60 °, and C is 10 °；

Fig. 5 A to Fig. 5 C is the turn on thyristors situation that A phase signals is corresponding；

Fig. 6 A to Fig. 6 C is the turn on thyristors situation that B phase signals is corresponding；

Fig. 7 A to Fig. 7 C is the turn on thyristors situation that C phase signals is corresponding, in figure, 1# to 6# be respectively by IGCT according to The numbering that turn-on sequence is carried out.

Detailed description of the invention

For making this utility model become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.

A kind of electronic type intelligent accurate angle Selection that being illustrated in figure 1 this utility model provides controls the hardware cell of device Figure, including host CPU, in the present embodiment, host CPU uses STM32F103VBT6 single-chip microcomputer, and it has 32 kernels, 128KB journey Sequence internal memory, 20KB datarams, 12,8 tunnel A/D mouth, 6 road pwm signal outputs, 2 road SCI serial ports.

12 A/D mouths are used for measuring voltage x current, by signal gathering unit and signal processing unit acquisition process respectively The voltage and current signal between voltage and current signal and loop of power circuit and transformator between load circuit and loop of power circuit.Letter The concrete of number processing unit combines as in figure 2 it is shown, for ensureing the precision measured and control, the collection of electric current and voltage signal is to close Key, this utility model uses high-precision current transformer and voltage transformer, had both isolated major loop and had controlled between loop Voltage, protection controls the safety of part, improves again the precision measured and control.The sine wave signal collected is by amplifier Prune negative half period after reason processing of circuit, form the fluctuating signal of 50Hz.Square-wave signal is formed again by photoswitch switch unit, should Square-wave signal inputs STM32F103VBT6 single-chip microcomputer as synchronizing signal.

Loop of power circuit includes anti-parallel thyristor and thyristor trigger board.The key in parallel of high-power thyristor is exactly big The equal flow problem of power scr, the coupling solving the characteristic mainly by IGCT itself and some peripheral impedances realizes.In choosing When selecting IGCT, the related keyword parameter to IGCT carries out the concordance of pairing guarantee parallel thyristors parameter simultaneously in parallel connection The coupling of peripheral impedance is ensured in structure.This utility model also uses long line all to press mode can effectively suppress di/dt, du/dt.

The external interrupt of STM32F103VBT6 single-chip microcomputer is used for synchronizing signal and the collection of frequency；One road SCI is used for liquid crystal The communication of controller, another road SCI is for the communication with host computer 485.The PWM produced by STM32F103VBT6 single-chip microcomputer is defeated Go out and control IGCT to fiber optic distribution panels by fiber-optic transfer to IGCT pulse-triggered plate.

As it is shown on figure 3, software flow of the present utility model is as follows: first initialize after device power, then judge whole system Whether there is malfunction.After confirming fault-free, system enters normal operating condition, the enabling signal of waiting facilities.In this mistake Cheng Zhong, user can revise various parameters by the guidance panel of local touch screen or long-range host computer, also can check simultaneously The data measured, such as: voltage, electric current, malfunction etc..When equipment is in working stage, and user can not revise parameter, arrive down Could revise the when of primary equipment shutdown work.In the work process of whole equipment, moment failure judgement, once detect Fault, immediately enters exception handles, blocks equipment, sends failure alarm signal.

Being produced the pulse control signal for controlling IGCT by the PWM mouth of STM32F103VBT6 single-chip microcomputer, this signal leads to The process crossing photoelectric controller converts electrical signals to optical signal, and a road pulse signal is produced respectively by fiber optic distribution panels side by side Multichannel IGBT group signal, and time effective when itself and STM32F103VBT6 single-chip microcomputer enable signal while, STM32F103VBT6 single-chip microcomputer just sends out corresponding triggering pulse to IGCT.Owing to using N group IGCT parallel way to realize The control of big electric current, thus higher for triggering the requirement of signal conformance.One road voltage uses a railway digital output of pulse signal, After being divided into N road optical signal by fiber optic distribution panels, docked with corresponding N group trigger board by fiber-optic transfer, it is convenient to adjust defeated Go out width and the dutycycle of pulse, control concordance to realize triggering.

According to technology requirement, turn on thyristors angle range of accommodation is 0～180 °, resolution is 0.1ms, angle of flow error 0～2 °.This utility model uses broad pulse row to trigger, and reissues arteries and veins i.e. to while triggering certain IGCT another IGCT Punching.In this utility model, pulse width is 10-160ms.The generation of thyristor triggering impulse utilizes STM32F103VBT6 single-chip microcomputer The timing function of two 16 bit timing devices/enumerator T/C1 and T/C3, the mode of operation of T/C1 and T/C3 is set to quickly PWM mode, utilizes the comparison match of intervalometer to interrupt and spilling implement of interruption function Trigger Angle, pulse spacing and the pulse width of intervalometer The timing of degree.Analyzed by logical judgment, it is achieved precisely angle Selection controls, control accuracy≤± 1 °, repetitive error :≤± 1 °, resolution is 0.1 °, conduction time resolution 0.1ms.IGCT is numbered according to erection sequence, is followed successively by IGCT VT1, IGCT VT2, IGCT VT3, IGCT VT4, IGCT VT5, IGCT VT6, then use following steps to control crystalline substance The conducting of brake tube:

After step 1, host CPU capture the rising edge of synchronizing signal, produce the main bang and that width is 10 ° Individual width is the auxiliary pulse signal of 10 °, is spaced apart 60 ° between main bang and auxiliary pulse signal, and IGCT VT1 connects Turning on after receiving main bang, IGCT VT6 turns on after receiving auxiliary pulse signal；

Step 2, main bang step 1 produced and auxiliary pulse signal all postpone 60 °, and IGCT VT2 receives Turning on after main bang after delay, IGCT VT1 turns on after receiving the auxiliary pulse signal after delay；

Step 3, main bang step 2 produced and auxiliary pulse signal all postpone 60 °, and IGCT VT3 receives Turning on after main bang after delay, IGCT VT2 turns on after receiving the auxiliary pulse signal after delay；

After step 4, host CPU capture the trailing edge of synchronizing signal, produce the main bang and that width is 10 ° Individual width is the auxiliary pulse signal of 10 °, is spaced apart 60 ° between main bang and auxiliary pulse signal, and IGCT VT4 connects Turning on after receiving main bang, IGCT VT3 turns on after receiving auxiliary pulse signal；

Step 5, main bang step 4 produced and auxiliary pulse signal all postpone 60 °, and IGCT VT5 receives Turning on after main bang after delay, IGCT VT4 turns on after receiving the auxiliary pulse signal after delay；

Step 6, main bang step 5 produced and auxiliary pulse signal all postpone 60 °, and IGCT VT6 receives Turning on after main bang after delay, IGCT VT5 turns on after receiving the auxiliary pulse signal after delay.

It is as shown in the table that the IGCT that time on the basis of A phase, difference phase selection angle is corresponding opens situation:

Fig. 4 gives sequential chart of the present utility model, and turn on thyristors situation sees Fig. 5 A to Fig. 5 C, Fig. 6 A to Fig. 6 C and figure 7A to Fig. 7 C.

Claims (4)

1. electronic type intelligent accurate angle Selection controls a device, and power supply is connected with load circuit by loop of power circuit, power Loop include antiparallel IGCT and with the thyristor trigger board for controlling turn on thyristors, cut-off, it is characterised in that bag Include two paths of signals collecting unit, between a signal gathering unit access power loop, road and load circuit, another road signals collecting Between unit access power loop and power supply, two paths of signals collecting unit connects respective signal processing unit, at two paths of signals Reason unit is all connected with host CPU, and host CPU output pulse triggering signal is to fiber optic distribution panels, and fiber optic distribution panels is via optical fiber and brilliant lock Pipe trigger board is connected.

2. a kind of electronic type intelligent accurate angle Selection as claimed in claim 1 controls device, it is characterised in that described master CPU also sets up communication with host computer.

3. a kind of electronic type intelligent accurate angle Selection as claimed in claim 1 controls device, it is characterised in that described master CPU connects liquid-crystal controller.

4. a kind of electronic type intelligent accurate angle Selection as claimed in claim 1 controls device, it is characterised in that described signal Processing unit includes that the amplifier for being pruned by the negative half period of sinusoidal signal processes circuit, and amplifier processes input and the institute of circuit Stating signal gathering unit to be connected, the outfan of amplifier process circuit is connected to be formed the photoswitch switch unit of square wave.