CN206877189U - The intelligent high-precision voltage stabilizing device of adaptive wide dynamic power - Google Patents

Abstract

A kind of intelligent high-precision voltage stabilizing device of adaptive wide dynamic power is the utility model is related to, its major loop includes 1 compensator transformer, 4 IGBT and intelligent driven controlling system；Harmonics restraint inductance L1 is connected in 4 IGB of input power live wire and chop control, in the tail end connection first contactor (KM1 of compensator transformer (T1) primary side）Contact and second contactor (KM2）Contact；The two ends of compensator transformer (T1) secondary are simultaneously connected to the 3rd contactor (KM3）Contact.The utility model uses chop control technological adjustment offset voltage value, realizes and adapts to wide dynamic power and high-precision output voltage.

Description

The intelligent high-precision voltage stabilizing device of adaptive wide dynamic power

Technical field

A kind of voltage-stablizer is the utility model is related to, refers in particular to a kind of intelligent high-precision voltage stabilizing of adaptive wide dynamic power Device.

Background technology

Exceed radius of electricity supply for power supply remote districts, terminal voltage is difficult to ensure that power factor (PF) does not reach requirement, line loss Greatly；Power supply quality can not be met.Stable-pressure device is to ensure the essential component of power supply quality；Coil type on the market at present Stable-pressure device collocation structure or circuit are probably divided into 4 kinds：1st, it is made up of motor, automatic control circuit and carbon brush；It is such steady Pressure device response speed is slow, and fault rate is higher；2nd, it is made up of compensator transformer, multi-tap pressure regulator and contactor；Such voltage stabilizing Device realizes the function of voltage stabilizing by the respective taps of contactor matrix majorization multi-tap pressure regulator to compensator transformer power supply；This , the problem of precision of voltage regulation is low be present, and volume is larger in the multi-tap multi-regulator that class stable-pressure device uses；3rd, using connecing Tentaculum controls；Such compensation circuit response time is excessively slow, can not meet requirement for high-accuracy equipment；4th, by compensating more Transformer and Group of Silicon Controlled Rectifier into；Therefore its response time is fast using controllable silicon for such voltage-stablizer, but multiple compensator transformers are direct Stable-pressure device precision in itself and capacity issue are had influence on；Be present voltage stabilizing output discontinuously in this contactless stable-pressure device, mend Repay voltage and the reason for ladder grade be present, it is impossible to reach the purpose of high-precision voltage stabilizing output, especially to being wanted with work voltage accuracy Cisco unity malfunction in the case of asking higher.

On 06 18th, 2014, extremely electric Science and Technology Ltd. was closed in Chinese utility model Authorization Notice No. in Zhejiang： In CN203658891U, disclose a kind of contactless voltage stabilizer of chopped mode, it include 1 compensator transformer, 4 IGBT, 4 can Control silicon, 1 electric capacity and 1 inductance, input power live wire connects one end of compensator transformer secondary, compensator transformer secondary it is another The first IGBT colelctor electrode is terminated, and connects output end of pressure-stabilizing, the first IGBT and the 2nd IGBT series connection, the 2nd IGBT colelctor electrode connect The colelctor electrode of inductance and the 4th IGBT, the other end of inductance connect one end of electric capacity, second controllable silicon one end, the 4th controllable silicon respectively One end, the second controllable silicon and the first controllable silicon in serial connection, the 4th controllable silicon and the 3rd controllable silicon in serial connection, the intermediate point of two series circuits Another terminal connecting zero line at the both ends of compensator transformer primary side, the first controllable silicon and the 3rd controllable silicon, the other end of electric capacity are connect respectively Connecting to neutral line, the 4th IGBT emitter stage connect the 3rd IGBT emitter stage, the 3rd IGBT colelctor electrode connecting to neutral line.The utility model is led to The working condition of 4 controllable silicons of control is crossed, to control the direction of compensator transformer original edge voltage, so as to obtain required compensation secondary Voltage Δ U size and Orientation, realize output burning voltage.But conducting resistance be present and easily generate heat in controllable silicon, internal system electricity Damage larger；The high-frequency harmonic of internal system simultaneously be present, directly affect the power supply quality of external electrical network.

The content of the invention

Technical problem to be solved in the utility model is the deficiency for existing stable-pressure device technology, there is provided a kind of adaptive The intelligent high-precision voltage stabilizing device of wide dynamic power is answered, it uses chop control technological adjustment offset voltage value, realizes adaptation Wide dynamic power and high-precision output voltage.

To achieve the above object, the utility model is achieved by the following technical solution：Including 1 compensator transformer, 4 Individual IGBT and intelligent driven controlling system；Input power live wire connects the head end of compensator transformer secondary；Input power live wire also passes through Harmonics restraint inductance connects the first IGBT colelctor electrode and first contactor, and connects compensator transformer by the contact of first contactor Primary side tail end；First IGBT and the 2nd IGBT series connection, the 2nd IGBT colelctor electrode connect High frequency filter inductance and the 3rd IGBT simultaneously Colelctor electrode；The head end of another termination compensator transformer primary side of High frequency filter inductance, and with being attempted by compensator transformer primary side The second filter capacitor composition LC High frequency filters loop of two ends；3rd IGBT emitter stage connects the 4th IGBT emitter stage, the Four IGBT colelctor electrode connecting to neutral line；First filtered electrical also in parallel between the first IGBT colelctor electrodes and the 4th IGBT colelctor electrodes Hold；The tail end of the compensator transformer secondary connects output end of pressure-stabilizing；The two ends of the compensator transformer secondary are simultaneously connected to the 3rd Probe of contactor and shaping capacitance；The compensator transformer primary side tail end also controls connecting to neutral line by the contact of second contactor End.

The utility model exceedes radius of electricity supply mainly in part power supply remote districts, and terminal voltage is difficult to ensure that, work( Rate factor does not reach requirement, and line loss is big；Power supply quality can not be met；The equipment can be AC in supply voltage:When 140V certainly AC is arrived in dynamic compensation:220V, it is AC in supply voltage:Automatically AC220V is depressured to during 300V；The use of user terminal is sufficiently ensured The security of electricity quality and electrical equipment.

Utility model works principle：In utility model works, compensator transformer (T1) of the AC power by series connection Secondary is exported to power supply output end, when output supply voltage stabilization exists：The device is failure to actuate when in AC220V ± 10%；When When output voltage is below or above AC220V ± 10%, the device triggers IGBT high frequencies by intelligent driven controlling system The primary side of energized circuit excitation compensator transformer (T1) realizes whole voltage stabilizing process.

Innovative point of the present utility model is：1）Harmonics restraint is connected in 4 IGB of input power live wire and chop control Inductance L1, harmonics restraint inductance L1 effect are：High-frequency harmonic inside its system and device is filtered out, does not influence external electrical network Power supply quality.2）In the tail end connection first contactor (KM1 of compensator transformer (T1) primary side）Contact, input power is introduced Compensation；When input supply voltage is higher than 242V, decompression scope can be expanded；Also connect in the tail end of compensator transformer (T1) primary side Meet second contactor (KM2）Contact, by the tail end connecting to neutral of compensator transformer (T1) primary side；Input supply voltage less than 198V with When lower, boosting scope can be expanded；Actual measurement the utility model, which adapts to supply voltage dynamic range, can reach 140-300V, significantly More than ± 20% dynamic voltage stabilized range of prior art.The utility model is small using contactor coil own loss electric current, main contact Internal resistance is low, and current-carrying capacity is big, and the coefficient of stability is high；Larger save the power consumption of equipment itself.3）Compensator transformer (T1) secondary Two ends are simultaneously connected to the 3rd contactor (KM3）Contact, its effect is the 3rd contactor when not boosting or being depressured (KM3）Adhesive bypasses compensator transformer (T1) secondary, and oneself power consumption is reduced hence into standby park mode；In addition, examining When measuring control system itself has abnormal, compensator transformer (T1) secondary adhesive can also bypass, so as to ensure that customer power supply Continuation.

Brief description of the drawings

Fig. 1 is major loop schematic diagram of the present utility model.

Fig. 2 is system control block of the present utility model.

Mark is in figure：T1 compensator transformers；L1 harmonics restraint inductance；L2 High frequency filter inductance；The IGBT of Q1 the first；Q2 Two IGBT；The IGBT of Q3 the 3rd；The IGBT of Q4 the 4th；The filter capacitors of C1 first；The filter capacitors of C2 second；C3 shaping capacitances；KM1 first Contactor；KM2 second contactors；The contactors of KM3 the 3rd；CT current transformers.

Embodiment

The utility model is described again with reference to embodiment and its accompanying drawing.

Referring to Fig. 1, a kind of intelligent high-precision voltage stabilizing device of adaptive wide dynamic power, including 1 compensator transformer (T1), 4 IGBT and intelligent driven controlling system；Input power live wire connects the head end of compensator transformer (T1) secondary；Input electricity Source live wire also connects the first IGBT (Q1) colelctor electrode and first contactor through harmonics restraint inductance (L1)（KM1）, and pass through first Contactor (KM1）Contact connect compensator transformer (T1) primary side tail end；First IGBT (Q1) and the 2nd IGBT (Q2) series connection, second IGBT (Q2) colelctor electrode connects High frequency filter inductance (L2) and the 3rd IGBT (Q3) colelctor electrode simultaneously；High frequency filter inductance (L2) Another termination compensator transformer (T1) primary side head end, and be attempted by compensator transformer (T1) primary side two ends second filter Ripple electric capacity (C2) composition LC High frequency filters loop；3rd IGBT (Q3) emitter stage connects the 4th IGBT (Q4) emitter stage, and the 4th IGBT (Q4) colelctor electrode connecting to neutral line；It is also in parallel one between the first IGBT (Q1) colelctor electrodes and the 4th IGBT (Q2) colelctor electrode First filter capacitor (C1)；The tail end of compensator transformer (T1) secondary connects output end of pressure-stabilizing；The compensator transformer (T1) The two ends of secondary are simultaneously connected to the 3rd contactor (KM3）Contact and shaping capacitance (C3)；Compensator transformer (T1) the primary side tail End also passes through second contactor (KM2）Contact control connecting to neutral line end.

First contactor (the KM1）Contact and second contactor (KM2）Contact, by design on control circuit for interlocking, Or full off-state.

The tail end of compensator transformer (T1) secondary also passes through current transformer（CT）Connect output end of pressure-stabilizing, Current Mutual Inductance Device（CT）The protection detection circuit in intelligent driven controlling system is connected, realizes system protection；When current value exceedes setting for system When putting value, by analog-to-digital conversion, system self-protection stops output, and alarms.

In 4 described IGBT, it is parallel between each IGBT emitter and collector by diode, resistance and electric capacity The surge absoption loop formed.

Referring to Fig. 2：The intelligent driven controlling system by RM singlechip microprocessors, man-machine interaction button set circuit, PMW pulsewidth modulations isolated drive circuit and communication interface circuit composition；PMW pulsewidth modulations isolated drive circuit and RM single-chip microcomputers are micro- Processor is independently-powered by insulating power supply, and RM singlechip microprocessors connection man-machine interaction button sets circuit and communication interface； RM singlechip microprocessors are by protecting detection circuit to form closed loop with PMW pulsewidth modulations isolated drive circuit, IGBT components PID control；The drive signal connection IGBT of PMW pulsewidth modulation isolated drive circuits control terminal；The voltage letter of output end of pressure-stabilizing Number by voltage monitoring sampling send RM singlechip microprocessors；The current signal of output end of pressure-stabilizing is by protecting detection circuit to carry out Analog-to-digital conversion feeds back to RM singlechip microprocessors.

Compared with prior art, in the present embodiment work, when input voltage deviates, intelligent driven controlling system is defeated from voltage stabilizing Go out end and take voltage monitoring sample, when detecting that output voltage Uo is not equal to AC220V ± 10%, i.e., be such as that output voltage Uo is Second contactor (KM2 during below 198V）Contact adhesive, or first contactor when output voltage Uo is more than AC242V (KM1）Contact adhesive, the microprocessor in intelligent driven controlling system export PMW pulse-width signals and driven to isolation drive plate It is dynamic, then by triggering pin of the PMW signal outputs to IGBT；In AC power input voltage Ui positive half cycle, with the first IGBT (Q1) Chop control is carried out, afterflow passage is provided to load current with the 3rd IGBT (Q3)；Negative the half of AC power input voltage Ui In week, chop control is carried out with the 2nd IGBT (Q2), afterflow passage is provided to load current with the 4th IGBT (Q4)；High frequency filter electricity Feel (L2) and the second filter capacitor (C2) composition High frequency filter, high frequency waves are filtered out, pure sine wave is obtained and is applied to compensation Transformer (T1) primary side（It is primary）, compensator transformer (T1) secondary（It is secondary）Produce change Δ U, by Δ U=0 after no-load voltage ratio~ 80V voltages are applied in general supply, total output voltage Uo=Ui ± Δ U is realized the purpose of automatic voltage regulation.

The surge absoption loop of the present embodiment, primarily to protecting IGBT not by surge impact.The electric current of the present embodiment Transformer, the current value of moment detection output, when current value exceedes the arranges value of system, system self-protection stops output, And alarm.

Communication interface of the present utility model provides RS485 communication interfaces for device, and upper machine communication, for monitoring it Running status and variable, the reflection in time of the information such as fault category, installation site host computer, work people can be arrived when system exception Member just can be directly to in-situ processing problem by the prompting of host computer.

The effect of the shaping capacitance (C3) of the present embodiment is straight-through carrier signal so that the stable not packet loss of carrier signal；And Compensator transformer (T1) is exported and filtered, ensure that the quality of output waveform.

The voltage sampling standard of the present embodiment：Out-put supply is input to control mainboard with input power sampling, through decompression -12 It is compared after the analog-to-digital conversion of position by CPU, its reference voltage depends on the arranges value of man-machine interface, arranges value and input/output Value is compared, and PWM pulse-width signals is exported by certain algorithm, using closed loop PID control.

The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party Formula, can also be on the premise of this patent objective not be departed from one skilled in the relevant art's possessed knowledge Various changes can be made.

Claims (2)

1. a kind of intelligent high-precision voltage stabilizing device of adaptive wide dynamic power, including 1 compensator transformer (T1), 4 IGBT And intelligent driven controlling system；It is characterized in that：Input power live wire connects the head end of compensator transformer (T1) secondary；Input power fire Line also connects the first IGBT (Q1) colelctor electrode and first contactor through harmonics restraint inductance (L1)（KM1）, and pass through the first contact Device (KM1）Contact connect compensator transformer (T1) primary side tail end；First IGBT (Q1) and the 2nd IGBT (Q2) series connection, the 2nd IGBT (Q2) colelctor electrode connects High frequency filter inductance (L2) and the 3rd IGBT (Q3) colelctor electrode simultaneously；High frequency filter inductance (L2) it is another The head end of one termination compensator transformer (T1) primary side, and with being attempted by the second filtered electrical of compensator transformer (T1) primary side two ends Hold (C2) composition LC High frequency filters loop；3rd IGBT (Q3) emitter stage meets the 4th IGBT (Q4) emitter stage, the 4th IGBT (Q4) colelctor electrode connecting to neutral line；It is also in parallel one first between the first IGBT (Q1) colelctor electrodes and the 4th IGBT (Q4) colelctor electrode Filter capacitor (C1)；The tail end of compensator transformer (T1) secondary connects output end of pressure-stabilizing；Compensator transformer (T1) secondary Two ends and be connected to the 3rd contactor (KM3）Contact and shaping capacitance (C3)；Compensator transformer (T1) the primary side tail end is also Pass through second contactor (KM2）Contact control connecting to neutral line end；The intelligent driven controlling system by RM singlechip microprocessors, Man-machine interaction button sets circuit, PMW pulsewidth modulations isolated drive circuit and communication interface circuit composition；PMW pulsewidth modulations every Independently-powered by insulating power supply from drive circuit and RM singlechip microprocessors, the connection man-machine interaction of RM singlechip microprocessors is pressed Key sets circuit and communication interface；RM singlechip microprocessors are by protecting detection circuit and PMW pulsewidth modulations isolation drive electricity Road, IGBT components form closed loop PID control；The drive signal connection IGBT of PMW pulsewidth modulation isolated drive circuits control End；The voltage signal of output end of pressure-stabilizing send RM singlechip microprocessors by voltage monitoring sampling；The electric current letter of output end of pressure-stabilizing Number by protect detection circuit carry out analog-to-digital conversion feed back to RM singlechip microprocessors.

2. the intelligent high-precision voltage stabilizing device of adaptive wide dynamic power according to claim 1, it is characterised in that：It is described First contactor (KM1）Contact and second contactor (KM2）Contact, it is interlocking or full off-state by design on control circuit.