CN105207462B - A kind of high-voltage high-power frequency transformator and the electrical equipment with the frequency converter - Google Patents

A kind of high-voltage high-power frequency transformator and the electrical equipment with the frequency converter Download PDF

Info

Publication number
CN105207462B
CN105207462B CN201510612391.7A CN201510612391A CN105207462B CN 105207462 B CN105207462 B CN 105207462B CN 201510612391 A CN201510612391 A CN 201510612391A CN 105207462 B CN105207462 B CN 105207462B
Authority
CN
China
Prior art keywords
resistance
soft
power
voltage
input
Prior art date
Application number
CN201510612391.7A
Other languages
Chinese (zh)
Other versions
CN105207462A (en
Inventor
彭丽巧
褚立峰
张大为
彭丽敏
Original Assignee
北京动力源科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京动力源科技股份有限公司 filed Critical 北京动力源科技股份有限公司
Priority to CN201510612391.7A priority Critical patent/CN105207462B/en
Publication of CN105207462A publication Critical patent/CN105207462A/en
Application granted granted Critical
Publication of CN105207462B publication Critical patent/CN105207462B/en

Links

Abstract

The invention discloses a kind of high-voltage high-power frequency transformator and with the electrical equipment of the frequency converter.Wherein, the high-voltage high-power frequency transformator includes:It is soft to power on high-pressure section and soft power on low-pressure section;It is described it is soft power on high-pressure section, type is powered on according to frequency conversion system, pass through PLC control high voltage connector division, realize high tension loop break-make, so as to it is described it is soft power on low-pressure section, according to the instruction of control system, realize the soft upper Electricity Functional of low pressure or the soft upper Electricity Functional of high pressure;The type that powers on is that high pressure powers on or low pressure powers on.Technical solution of the present invention realizes that high pressure is soft by using low resistance classification and powers on design, realizes high-voltage high-power frequency transformator and exempts from high pressure zero load, waveform, fault test, shortens the field adjustable period;It is multiplexed low-voltage device group, realizes that high-voltage high-power frequency transformator high pressure is classified soft upper Electricity Functional, reduces rush of current, reduce system cost, reduction system volume.

Description

A kind of high-voltage high-power frequency transformator and the electrical equipment with the frequency converter

Technical field

The present invention relates to power electronics field, more particularly to a kind of high-voltage high-power frequency transformator and have the frequency converter Electrical equipment.

Background technology

With scientific technological advance, single production line daily output fast lifting, the capacity of the high-voltage motor configured is more next Bigger, the capacity of matched frequency converter is also increasing.The application of the phase-shifting transformer of large capacity and a large amount of electrolytic capacitors, So that high-voltage frequency converter powered on moment electric current is up to 5-10 times of rated current of motor, remote super motor normal operating current, greatly Increase higher level's supply transformer, supply line's capacity and user terminal high voltage power supply incoming line cabinet power on trip risk.It is existing In technology, tandem type high-voltage frequency converter is mainly by control system, power system, transformation phase-shift system, four part structure of bypath system At.The power unit module of voltage-type tandem type high voltage frequency converter power system realizes direct current using a large amount of electrolytic capacitor connection in series-parallel Filter function.

Existing frequency converter, which powers on, generally uses circuit as shown in Figure 1, and powering on front end in frequency converter adds with being contacted by high pressure The high pressure of device KM1 and 3 high-power high voltage resistance R1/2/3 compositions is soft to power on part.In high-voltage frequency converter before high pressure, first open High pressure QS12, QS22 disconnecting link, KM1 contactors, closed high QS11, QS21 disconnecting link, the upper electrical circuit of high-tension resistive access.It is closed and uses Family end high voltage power supply lead-in circuit breaker QF1 (2-5 times of combined floodgate dash current), power supply are after high-tension resistive R1/2/3 partial pressure current limlitings Frequency converter powers on.After high pressure QF1 is closed, PLC starts timing, and timing time arrives, and closed high KM1 contactors are short by high-tension resistive It connects (2-5 times of short circuit dash current), soft to power on end, power grid is high-voltage frequency converter normal power supply.Using the power system, when QF1 combined floodgate moments, KM1 combined floodgate moment impact electric currents are big;And in frequency converter operational process, high-tension resistive R1/2/3 is charged always, It is easily damaged and is not easy to safeguard;Also it is exactly of high cost using the high-power resistance R1/2/3, size is big, is not easy to Patching operations.

However, being to increase system reliability in the prior art, circuit as shown in Figure 2 can also be used, that is, is based on to power on Line structure adds with high voltage connector KM2, KM3.On frequency conversion system before high pressure, high pressure QS12, QS22 disconnecting link, KM1 contacts are first opened Device, closed high QS11, QS21 disconnecting link, KM2, KM3 contactor, electrical circuit in high-tension resistive R1/2/3 accesses.Closed high is used Family end high voltage power supply incoming line cabinet QF1, power supply are after high-pressure vacuum contactor KM2, KM3, high-tension resistive R1/2/3 partial pressure current limlitings Frequency converter powers on.After high pressure QF1 is closed, PLC starts timing, and timing time arrives, and is closed KM1 contactors by high-tension resistive short circuit, It is soft to power on end, the normal high voltage supply of high-voltage frequency converter.High pressure KM2, KM3 contactor is disconnected, by high-tension resistive R1/2/3 and electricity Air circuit disconnects.

But using the circuit during inventor find in the prior art at least there is a problem in that:

QF1 combined floodgate moments, KM1 combined floodgate moment impact electric currents are still larger in the prior art, and control logic is complicated, are easy Cause maloperation, is also exactly more using the circuit high tension apparatus, is not easy to wiring, low space utilization.

Invention content

In view of the above problems, it is proposed that the present invention overcoming the above problem in order to provide one kind or solves at least partly A kind of high-voltage high-power frequency transformator and the electrical equipment with the frequency converter for stating problem.

One side according to the present invention, the present invention provides a kind of high-voltage high-power frequency transformator, which becomes Frequency device includes:It is soft to power on high-pressure section and soft power on low-pressure section;

It is described it is soft power on high-pressure section, type is powered on according to frequency conversion system, by PLC control high voltage connector division, Realize high tension loop break-make, so as to it is described it is soft power on low-pressure section, according to the instruction of control system, realize the soft upper Electricity Functional of low pressure Or the soft upper Electricity Functional of high pressure;

The type that powers on is that high pressure powers on or low pressure powers on.

Wherein, the soft low-pressure section that powers on includes:It is soft power on function selecting module, input voltage measurement module, it is soft on Electric control low-voltage module;

It is described it is soft power on function selecting module, for choose whether enter soft power up mode, if into soft power up mode, Then start the input voltage measurement module;

The input voltage measurement module, the tertiary winding voltage for detecting phase-shifting transformer, and the electricity that will be detected Pressure is transferred to controller;

The soft upper electric control low-voltage module, the voltage swing for being detected according to the input voltage measurement module, with And the controller instruction, carry out corresponding operating.

Wherein, the input voltage measurement module includes:First input voltage measurement branch, the second input voltage measurement branch Road, third input voltage measurement branch;

The first input voltage measurement branch includes:Eleventh resistor, twelfth resistor, the first transformer, the first fortune It puts, the 11st capacitance, the 12nd capacitance, the 14th resistance and the 15th resistance;

The eleventh resistor one terminates the A phase voltages input, another described twelfth resistor one end of termination;

Another termination the first transformer input terminal 1 of the same name of twelfth resistor;

The first transformer output end 3 of the same name connects the first amplifier positive input, and first transformer is another Input terminal 2 connects power input terminal, another output end of first transformer 4 connect the first amplifier negative input with it is described 14th resistance connecting pin;

The first amplifier output terminates the 15th resistance and the 14th resistance connecting pin;

Another termination controller voltage sample input terminal of 15th resistance;

Twelfth resistor one end ground connection, another termination the first amplifier forward direction power end;

Eleventh resistor one end ground connection, another termination the first amplifier negative sense power end;

The second input voltage measurement branch includes:21st resistance, the 22nd resistance, the second transformer, the Two amplifiers, the 21st capacitance, the 22nd capacitance, the 24th resistance and the 25th resistance;

21st resistance one terminates the B phase voltages input, another described 22nd resistance one end of termination;

Another termination the second transformer input terminal 1 of the same name of 22nd resistance;

The second transformer output end 3 of the same name connects the second amplifier positive input, and second transformer is another Input terminal 2 connects power input terminal, another output end of second transformer 4 connect the second amplifier negative input with it is described 24th resistance connecting pin;

The second amplifier output terminates the 25th resistance and the 24th resistance connecting pin;

Another termination controller voltage sample input terminal of 25th resistance;

22nd resistance one end ground connection, another termination the second amplifier forward direction power end;

21st resistance one end ground connection, another termination the second amplifier negative sense power end;

The third input voltage measurement branch includes:31st resistance, the 32nd resistance, third transformer, the Three amplifiers, the 31st capacitance, the 32nd capacitance, the 34th resistance and the 35th resistance;

31st resistance one terminates the C phase voltages input, another described 32nd resistance one end of termination;

Another termination third transformer input terminal 1 of the same name of 32nd resistance;

The third transformer output end 3 of the same name connects the third amplifier positive input, and the third transformer is another Input terminal 2 connects power input terminal, another output end of the third transformer 4 connect the third amplifier negative input with it is described 34th resistance connecting pin;

The third amplifier output terminates the 35th resistance and the 34th resistance connecting pin;

Another termination controller voltage sample input terminal of 35th resistance;

32nd resistance one end ground connection, another termination third amplifier forward direction power end;

31st resistance one end ground connection, another termination third amplifier negative sense power end.

Wherein, the soft upper electric control low-voltage module includes:Low pressure is soft to power on resistance group one, and low pressure is soft to power on resistance group Two, the 4th contactor and the 5th contactor;

The low pressure is soft to be powered on after resistance group one is connected in parallel with the 4th contactor, one end and the controller phase Even, another termination is described soft powers on function selecting module;

The low pressure is soft to be powered on after resistance group two is connected in parallel with the 5th contactor, one end and the controller phase Even, another termination is soft powers on function selecting module.

Wherein, the soft high-pressure section that powers on includes:One soft upper electric control high voltage connector;The soft upper electric control is high Crimping tentaculum one end is connected by high-voltage switch gear with high voltage power supply busbar, and the other end passes through high-voltage switch gear and three-phase alternating current phase Even.

Other side according to the present invention, the present invention provides a kind of electrical equipment, which includes:High pressure is big Power inverter;The high-voltage high-power frequency transformator includes:It is soft to power on high-pressure section and soft power on low-pressure section;

It is described it is soft power on high-pressure section, type is powered on according to frequency conversion system, by a soft upper electric control high-voltage connecting touch High tension loop connection is realized in device, control, so as to it is described it is soft power on low-pressure section, according to the instruction of control system, realize that low pressure is soft Upper Electricity Functional or the soft upper Electricity Functional of high pressure;

The type that powers on is that high pressure powers on or low pressure powers on.

Wherein, the soft low-pressure section that powers on includes:It is soft power on function selecting module, input voltage measurement module, it is soft on Electric control low-voltage module;

It is described it is soft power on function selecting module, for choose whether enter soft power up mode, if into soft power up mode, Then start the input voltage measurement module;

The input voltage measurement module, the tertiary winding voltage for detecting phase-shifting transformer, and the electricity that will be detected Pressure is transferred to controller;

The soft upper electric control low-voltage module, the voltage swing for being detected according to the input voltage measurement module, with And the controller instruction, carry out corresponding operating.

Wherein, the input voltage measurement module includes:First input voltage measurement branch, the second input voltage measurement branch Road, third input voltage measurement branch;

The first input voltage measurement branch includes:Eleventh resistor, twelfth resistor, the first transformer, the first fortune It puts, the 11st capacitance, the 12nd capacitance, the 14th resistance and the 15th resistance;

The eleventh resistor one terminates the A phase voltages input, another described twelfth resistor one end of termination;

Another termination the first transformer input terminal 1 of the same name of twelfth resistor;

The first transformer output end 3 of the same name connects the first amplifier positive input, and first transformer is another Input terminal 2 connects power input terminal, another output end of first transformer 4 connect the first amplifier negative input with it is described 14th resistance connecting pin;

The first amplifier output terminates the 15th resistance and the 14th resistance connecting pin;

Another termination controller voltage sample input terminal of 15th resistance;

Twelfth resistor one end ground connection, another termination the first amplifier forward direction power end;

Eleventh resistor one end ground connection, another termination the first amplifier negative sense power end;

The second input voltage measurement branch includes:21st resistance, the 22nd resistance, the second transformer, the Two amplifiers, the 21st capacitance, the 22nd capacitance, the 24th resistance and the 25th resistance;

21st resistance one terminates the B phase voltages input, another described 22nd resistance one end of termination;

Another termination the second transformer input terminal 1 of the same name of 22nd resistance;

The second transformer output end 3 of the same name connects the second amplifier positive input, and second transformer is another Input terminal 2 connects power input terminal, another output end of second transformer 4 connect the second amplifier negative input with it is described 24th resistance connecting pin;

The second amplifier output terminates the 25th resistance and the 24th resistance connecting pin;

Another termination controller voltage sample input terminal of 25th resistance;

22nd resistance one end ground connection, another termination the second amplifier forward direction power end;

21st resistance one end ground connection, another termination the second amplifier negative sense power end;

The third input voltage measurement branch includes:31st resistance, the 32nd resistance, third transformer, the Three amplifiers, the 31st capacitance, the 32nd capacitance, the 34th resistance and the 35th resistance;

31st resistance one terminates the C phase voltages input, another described 32nd resistance one end of termination;

Another termination third transformer input terminal 1 of the same name of 32nd resistance;

The third transformer output end 3 of the same name connects the third amplifier positive input, and the third transformer is another Input terminal 2 connects power input terminal, another output end of the third transformer 4 connect the third amplifier negative input with it is described 34th resistance connecting pin;

The third amplifier output terminates the 35th resistance and the 34th resistance connecting pin;

Another termination controller voltage sample input terminal of 35th resistance;

32nd resistance one end ground connection, another termination third amplifier forward direction power end;

31st resistance one end ground connection, another termination third amplifier negative sense power end.

Wherein, the soft upper electric control low-voltage module includes:Low pressure is soft to power on resistance group one, and low pressure is soft to power on resistance group Two, the 4th contactor and the 5th contactor;

The low pressure is soft to be powered on after resistance group one is connected in parallel with the 4th contactor, one end and the controller phase Even, another termination is described soft powers on function selecting module;

The low pressure is soft to be powered on after resistance group two is connected in parallel with the 5th contactor, one end and the controller phase Even, another termination is soft powers on function selecting module.

Wherein, the soft high-pressure section that powers on includes:One soft upper electric control high voltage connector;The soft upper electric control is high Crimping tentaculum one end is connected by high-voltage switch gear with high voltage power supply busbar, and the other end passes through high-voltage switch gear and three-phase alternating current phase Even.

The beneficial effects of the invention are as follows:It realizes that high pressure is soft by using low resistance classification and powers on design, realize high pressure Big-power transducer exempts from high pressure zero load, waveform, fault test, shortens the field adjustable period;It is multiplexed low-voltage device group, realizes high pressure Big-power transducer high pressure is classified soft upper Electricity Functional, reduces rush of current, reduces system cost, reduction system volume.

Description of the drawings

Fig. 1, which is that a kind of high-voltage frequency converter is soft in the prior art, powers on system structure diagram;

Fig. 2 is that another in the prior art high-voltage frequency converter is soft powers on system structure diagram;

Fig. 3 is a kind of high-voltage high-power frequency transformator electrical block diagram provided by the invention;

Fig. 4 is that a kind of the soft of high-voltage high-power frequency transformator provided by the invention powers on high-pressure section structural schematic diagram;

Fig. 5 is that a kind of the soft of high-voltage high-power frequency transformator provided by the invention powers on low-pressure section structural schematic diagram;

Fig. 6 is that a kind of the soft of high-voltage high-power frequency transformator provided by the invention powers on control interface schematic diagram;

Fig. 7 is a kind of soft input voltage measurement mould for powering on low-pressure section of high-voltage high-power frequency transformator provided by the invention Block circuit diagram;

Fig. 8 is a kind of electrical equipment structural schematic diagram provided by the invention.

Specific implementation mode

To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention Formula is described in further detail.

The high-power being previously mentioned in patent of the present invention refers to 2000kW or more;The high pressure being previously mentioned refer to 1000V with Above but it is no more than 35kV;The low pressure being previously mentioned refers to 380V.

Fig. 3 is a kind of high-voltage high-power frequency transformator electrical block diagram provided by the invention;The high-power frequency conversion Device includes:It is soft to power on high-pressure section 301 and soft power on low-pressure section 302;

It is described it is soft power on high-pressure section, type is powered on according to frequency conversion system, by PLC control high voltage connector division, Realize high tension loop break-make, so as to it is described it is soft power on low-pressure section, according to the instruction of control system, realize the soft upper Electricity Functional of low pressure Or the soft upper Electricity Functional of high pressure;

The type that powers on is that high pressure powers on or low pressure powers on

Wherein, the soft low-pressure section that powers on includes:It is soft power on function selecting module, input voltage measurement module, it is soft on Electric control low-voltage module;

It is described it is soft power on function selecting module, for choose whether enter soft power up mode, if into soft power up mode, Then start the input voltage measurement module;

The input voltage measurement module, the tertiary winding voltage for detecting phase-shifting transformer, and the electricity that will be detected Pressure is transferred to controller;

The soft upper electric control low-voltage module, the voltage swing for being detected according to the input voltage measurement module, with And the controller instruction, carry out corresponding operating.

Based on above example, the present invention is carried out specifically below by way of the operation principle of high-voltage high-power frequency transformator It is bright.

As shown in figure 4, being that a kind of the soft of high-voltage high-power frequency transformator provided in an embodiment of the present invention powers on high-pressure section knot Structure schematic diagram;

As shown in figure 5, being that a kind of the soft of high-voltage high-power frequency transformator provided in an embodiment of the present invention powers on low-pressure section knot Structure schematic diagram;

As shown in fig. 7, for the soft input for powering on low-pressure section of high-voltage high-power frequency transformator provided in an embodiment of the present invention Voltage detection module circuit diagram;

The soft of high-voltage high-power frequency transformator as shown in Figure 4 powers on high-pressure section compared with prior art, removes existing skill High-tension resistive R1/2/3, KM2, KM3 contactor in art scheme is reserved only to the high-voltage connecting that high tension loop connection is realized in control Tentaculum KM1.

It should be noted that the device in Fig. 1/Fig. 2/Fig. 4 is high tension apparatus, the device in Fig. 5 is low-voltage device.

The soft of high-voltage high-power frequency transformator as shown in Figure 5 powers on low-pressure section, which includes:Soft upper Electricity Functional selection Module, input voltage measurement module (as shown in Figure 7), soft upper electric control low-voltage module;

When the soft upper Electricity Functional of high-voltage high-power frequency transformator realization low pressure, the soft of high-voltage high-power frequency transformator powers on height Laminate section is as shown in figure 4, need on frequency conversion system before low pressure, to disconnect high pressure QS11, QS21 disconnecting link, high pressure KM1 contactors close Close high pressure QS12, QS22 disconnecting link.

The soft of high-voltage high-power frequency transformator powers on low-pressure section as shown in figure 5, closed low QF11, QF12 switch, KM11 Contactor, switch board power supply selection first via power supply (that is, coming from user AC380V), after control system is ready, high-power Frequency converter it is soft power on control interface as shown in fig. 6, press it is soft power on select button S11, the normally closed points of low pressure K11 disconnect, and forbid The tangential second tunnel control electricity (that is, coming from phase-shifting transformer) of power supply is controlled, low pressure K11 opened points are closed, and allow soft upper electric control (low pressure) part is put into.Closed low QF16 switches, the soft resistance group that powers on of low pressure is (that is, the soft resistance group one that powers on of low pressure is R11/ 12/13, the soft resistance group two that powers on of low pressure is R14/15/16) it puts into, the phase-shifting transformer tertiary winding obtains electric, shifted transformer Reverse boosting, powers on for power cell.Input voltage measurement module as shown in fig. 7, detection phase-shifting transformer tertiary winding voltage, And the voltage is transferred to controller, when phase-shifting transformer primary side voltage is close to phase voltage (35% ± 5V), it is closed low KM14 contactors are pressed, first order low pressure R11/12/13 resistance is cut off.Controller continues to detect phase-shifting transformer primary side voltage, When voltage is close to phase voltage (70% ± 5V), closed low KM15 contactors cut off second level low pressure R14/15/16 resistance, High-voltage frequency converter low voltage is soft to power on end.After unit DC bus-bar voltage is stablized, you can carry out frequency converter zero load, waveform, failure Equal test jobs, avoid scene that from can not carrying out the work because high voltage supply is not ready.

When the soft upper Electricity Functional of high-voltage high-power frequency transformator realization high pressure, the high-voltage frequency converter is soft to power on high-voltage section Point, on frequency conversion system before high pressure, high pressure QS12, QS22 disconnecting link, high pressure KM1 contactors, closed high are disconnected as shown in Figure 4 QS11, QS21 disconnecting link.

The high-voltage frequency converter is soft to power on low-pressure section as shown in figure 5, closed low QF11, QF12 switch, KM11 contacts Device, switch board power supply selection first via power supply (that is, coming from user AC380V), after control system is ready, high-power frequency conversion Device it is soft power on control interface as shown in fig. 6, close it is soft power on selecting switch S11, the normally closed points of low pressure K11 disconnect, and forbid controlling The tangential second tunnel control electricity (that is, coming from phase-shifting transformer) of power supply, low pressure K11 opened points are closed, and allow soft upper electric control (low Pressure) part input.Closed low QF16 switches, the soft resistance group that powers on of low pressure is (that is, the soft resistance group one that powers on of low pressure is R11/12/ 13, low pressure is soft, and to power on resistance group two be R14/15/16) input, the phase-shifting transformer tertiary winding obtains electric, and shifted transformer is reverse Boosting, powers on for power cell.Input voltage measurement module is as shown in fig. 7, detection phase-shifting transformer tertiary winding voltage is sent into Controller, when phase-shifting transformer primary side voltage is close to phase voltage (35% ± 5V), closed low KM14 contactors, excision the Level-one low pressure R11/12/13 resistance/.Controller continues to detect phase-shifting transformer primary side voltage, when voltage is close to phase voltage When (70% ± 5V), closed low KM15 contactors cut off second level low pressure R14/15/16 resistance.Unit DC bus-bar voltage After stabilization, low pressure KM15 contactors are disconnected, delay 0.5s is closed (Fig. 4) high pressure KM1 contactors, and frequency converter is supplied by high voltage bus Electricity, frequency conversion system power on end, and delay 1min disconnections are soft to power on selecting switch, and system restores state to be launched, and low pressure K11 is normally closed Point closes, and allows to control the tangential second tunnel control electricity of power supply, low pressure K11 opened points disconnect, and forbid soft upper electric control (low pressure) portion Divide input.

Technical solution of the present invention is with system bypass, i.e., for manual one-to-one switching mode, realizes high-power frequency conversion Device high-low voltage device multiplexing fusion it is soft powers on design, change the automatic one-to-one of system bypass, one drag it is more, more hold in the palm mostly etc. modes, And use low-voltage device to realize that low high pressure is compatible or the soft upper Electricity Functional of high pressure, the protection domain of technical solution of the present invention it In.

As shown in figure 8, being a kind of electrical equipment structural schematic diagram provided by the invention;The electrical equipment includes:High pressure Big-power transducer;The high-voltage high-power frequency transformator includes:It is soft to power on high-pressure section and soft power on low-pressure section;

It is described it is soft power on high-pressure section, type is powered on according to frequency conversion system, by a soft upper electric control high-voltage connecting touch High tension loop connection is realized in device, control, so as to it is described it is soft power on low-pressure section, according to the instruction of control system, realize that low pressure is soft Upper Electricity Functional or the soft upper Electricity Functional of high pressure;

The type that powers on is that high pressure powers on or low pressure powers on.

Wherein, the soft low-pressure section that powers on includes:It is soft power on function selecting module, input voltage measurement module, it is soft on Electric control low-voltage module;

It is described it is soft power on function selecting module, for choose whether enter soft power up mode, if into soft power up mode, Then start the input voltage measurement module;

The input voltage measurement module, the tertiary winding voltage for detecting phase-shifting transformer, and the electricity that will be detected Pressure is transferred to controller;

The soft upper electric control low-voltage module, the voltage swing for being detected according to the input voltage measurement module, with And the controller instruction, carry out corresponding operating.

Wherein, the input voltage measurement module includes:First input voltage measurement branch, the second input voltage measurement branch Road, third input voltage measurement branch;

The first input voltage measurement branch includes:Eleventh resistor, twelfth resistor, the first transformer, the first fortune It puts, the 11st capacitance, the 12nd capacitance, the 14th resistance and the 15th resistance;

The eleventh resistor one terminates the A phase voltages input, another described twelfth resistor one end of termination;

Another termination the first transformer input terminal 1 of the same name of twelfth resistor;

The first transformer output end 3 of the same name connects the first amplifier positive input, and first transformer is another Input terminal 2 connects power input terminal, another output end of first transformer 4 connect the first amplifier negative input with it is described 14th resistance connecting pin;

The first amplifier output terminates the 15th resistance and the 14th resistance connecting pin;

Another termination controller voltage sample input terminal of 15th resistance;

Twelfth resistor one end ground connection, another termination the first amplifier forward direction power end;

Eleventh resistor one end ground connection, another termination the first amplifier negative sense power end;

The second input voltage measurement branch includes:21st resistance, the 22nd resistance, the second transformer, the Two amplifiers, the 21st capacitance, the 22nd capacitance, the 24th resistance and the 25th resistance;

21st resistance one terminates the B phase voltages input, another described 22nd resistance one end of termination;

Another termination the second transformer input terminal 1 of the same name of 22nd resistance;

The second transformer output end 3 of the same name connects the second amplifier positive input, and second transformer is another Input terminal 2 connects power input terminal, another output end of second transformer 4 connect the second amplifier negative input with it is described 24th resistance connecting pin;

The second amplifier output terminates the 25th resistance and the 24th resistance connecting pin;

Another termination controller voltage sample input terminal of 25th resistance;

22nd resistance one end ground connection, another termination the second amplifier forward direction power end;

21st resistance one end ground connection, another termination the second amplifier negative sense power end;

The third input voltage measurement branch includes:31st resistance, the 32nd resistance, third transformer, the Three amplifiers, the 31st capacitance, the 32nd capacitance, the 34th resistance and the 35th resistance;

31st resistance one terminates the C phase voltages input, another described 32nd resistance one end of termination;

Another termination third transformer input terminal 1 of the same name of 32nd resistance;

The third transformer output end 3 of the same name connects the third amplifier positive input, and the third transformer is another Input terminal 2 connects power input terminal, another output end of the third transformer 4 connect the third amplifier negative input with it is described 34th resistance connecting pin;

The third amplifier output terminates the 35th resistance and the 34th resistance connecting pin;

Another termination controller voltage sample input terminal of 35th resistance;

32nd resistance one end ground connection, another termination third amplifier forward direction power end;

31st resistance one end ground connection, another termination third amplifier negative sense power end.

Wherein, the soft upper electric control low-voltage module includes:Low pressure is soft to power on resistance group one, and low pressure is soft to power on resistance group Two, the 4th contactor and the 5th contactor;

The low pressure is soft to be powered on after resistance group one is connected in parallel with the 4th contactor, one end and the controller phase Even, another termination is described soft powers on function selecting module;

The low pressure is soft to be powered on after resistance group two is connected in parallel with the 5th contactor, one end and the controller phase Even, another termination is soft powers on function selecting module.

Wherein, the soft high-pressure section that powers on includes:One soft upper electric control high voltage connector;The soft upper electric control is high Crimping tentaculum one end is connected by high-voltage switch gear with high voltage power supply busbar, and the other end passes through high-voltage switch gear and three-phase alternating current phase Even.

The beneficial effects of the invention are as follows:It realizes that high pressure is soft by using low resistance classification and powers on design, realize high pressure Big-power transducer exempts from high pressure zero load, waveform, fault test, shortens the field adjustable period;It is multiplexed low-voltage device group, realizes high pressure Big-power transducer high pressure is classified soft upper Electricity Functional, reduces rush of current, reduces system cost, reduction system volume.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention It is interior.

Claims (6)

1. a kind of high-voltage high-power frequency transformator, which is characterized in that including:It is soft to power on high-pressure section and soft power on low-pressure section;
It is described it is soft power on high-pressure section, type is powered on according to frequency conversion system, pass through PLC control high voltage connector division, realize High tension loop break-make, so as to it is described it is soft power on low-pressure section, according to the instruction of control system, realize the soft upper Electricity Functional of low pressure or The soft upper Electricity Functional of high pressure;
Wherein, the type that powers on is that high pressure powers on or low pressure powers on;
The soft low-pressure section that powers on includes:It is soft to power on function selecting module, input voltage measurement module, soft upper electric control low pressure Module;It is described it is soft power on function selecting module, for choose whether enter soft power up mode, if into soft power up mode, Start the input voltage measurement module;The input voltage measurement module, the tertiary winding electricity for detecting phase-shifting transformer Pressure, and the voltage detected is transferred to controller;The soft upper electric control low-voltage module, for being examined according to the input voltage Voltage swing and the controller instruction for surveying module detection, carry out corresponding operating;
The soft upper electric control low-voltage module includes:Low pressure is soft to power on resistance group one, and low pressure is soft to power on resistance group two, the 4th contact Device and the 5th contactor;The low pressure is soft to be powered on after resistance group one is connected in parallel with the 4th contactor, one end and the control Device processed is connected, and another termination is described soft to power on function selecting module;The soft resistance group two that powers on of the low pressure is contacted with the described 5th After device is connected in parallel, one end is connected with the controller, and another termination is soft to power on function selecting module;The low pressure is soft to power on electricity Resistance group one is connected with the soft resistance group two that powers on of the low pressure, the 4th contactor and the 5th contactor series connection.
2. high-voltage high-power frequency transformator as described in claim 1, which is characterized in that the input voltage measurement module includes: First input voltage measurement branch, the second input voltage measurement branch, third input voltage measurement branch;
The first input voltage measurement branch includes:Eleventh resistor, twelfth resistor, the first transformer, the first amplifier, the 11 capacitances, the 12nd capacitance, the 14th resistance and the 15th resistance;
The eleventh resistor one terminates the input of A phase voltages, another described twelfth resistor one end of termination;
Another termination the first transformer input terminal 1 of the same name of twelfth resistor;
The first transformer output end 3 of the same name connects the first amplifier positive input, another input of the first transformer End 2 connects power input terminal, and another output end of first transformer 4 connects the first amplifier negative input and the described tenth Four resistance connecting pins;
The first amplifier output terminates the 15th resistance and the 14th resistance connecting pin;
Another termination controller voltage sample input terminal of 15th resistance;
One end of 11st capacitance is connect with the positive power source terminal of the first operational amplifier N1A and -5V power supplys respectively, the other end Ground connection;
One end of 12nd capacitance is connect with the negative power end of the first operational amplifier N1A and+5V power supplys respectively, the other end Ground connection;
The second input voltage measurement branch includes:21st resistance, the 22nd resistance, the second transformer, the second fortune It puts, the 21st capacitance, the 22nd capacitance, the 24th resistance and the 25th resistance;
The 21st resistance one termination B phase voltages input, another described 22nd resistance one end of termination;
Another termination the second transformer input terminal 1 of the same name of 22nd resistance;
The second transformer output end 3 of the same name connects the second amplifier positive input, another input of the second transformer End 2 connects power input terminal, and another output end of second transformer 4 connects the second amplifier negative input and described second 14 resistance connecting pins;
The second amplifier output terminates the 25th resistance and the 24th resistance connecting pin;
Another termination controller voltage sample input terminal of 25th resistance;
One end of 21st capacitance is connect with the positive power source terminal of second operational amplifier N2A and -5V power supplys respectively, another End ground connection;
One end of 22nd capacitance is connect with the negative power end of the first operational amplifier N2A and+5V power supplys respectively, another End ground connection;
The third input voltage measurement branch includes:31st resistance, the 32nd resistance, third transformer, third fortune It puts, the 31st capacitance, the 32nd capacitance, the 34th resistance and the 35th resistance;
The 31st resistance one termination C phase voltages input, another described 32nd resistance one end of termination;
Another termination third transformer input terminal 1 of the same name of 32nd resistance;
The third transformer output end 3 of the same name connects the third amplifier positive input, another input of third transformer End 2 connects power input terminal, and another output end of the third transformer 4 connects the third amplifier negative input and the third 14 resistance connecting pins;
The third amplifier output terminates the 35th resistance and the 34th resistance connecting pin;
Another termination controller voltage sample input terminal of 35th resistance;
One end of 31st capacitance is connect with the positive power source terminal of third operational amplifier N3A and -5V power supplys respectively, another End ground connection;
One end of 32nd capacitance is connect with the negative power end of third operational amplifier N3A and+5V power supplys respectively, another End ground connection.
3. the high-voltage high-power frequency transformator as described in any one of claims 1 or 2, which is characterized in that described soft to power on height Laminate section includes:One soft upper electric control high voltage connector;Described soft upper electric control high voltage connector one end passes through high-voltage switch gear It is connected with high voltage power supply busbar, the other end is electrically connected by high-voltage switch gear and three-phase alternating current.
4. a kind of electrical equipment, which is characterized in that including:High-voltage high-power frequency transformator;The high-voltage high-power frequency transformator includes: It is soft to power on high-pressure section and soft power on low-pressure section;
It is described it is soft power on high-pressure section, type is powered on according to frequency conversion system, pass through PLC control high voltage connector division, realize High tension loop break-make, so as to it is described it is soft power on low-pressure section, according to the instruction of control system, realize the soft upper Electricity Functional of low pressure or The soft upper Electricity Functional of high pressure;
Wherein, the type that powers on is that high pressure powers on or low pressure powers on;
The soft low-pressure section that powers on includes:It is soft to power on function selecting module, input voltage measurement module, soft upper electric control low pressure Module;It is described it is soft power on function selecting module, for choose whether enter soft power up mode, if into soft power up mode, Start the input voltage measurement module;The input voltage measurement module, the tertiary winding electricity for detecting phase-shifting transformer Pressure, and the voltage detected is transferred to controller;The soft upper electric control low-voltage module, for being examined according to the input voltage Voltage swing and the controller instruction for surveying module detection, carry out corresponding operating;
The soft upper electric control low-voltage module includes:Low pressure is soft to power on resistance group one, and low pressure is soft to power on resistance group two, the 4th contact Device and the 5th contactor;The low pressure is soft to be powered on after resistance group one is connected in parallel with the 4th contactor, one end and the control Device processed is connected, and another termination is described soft to power on function selecting module;The soft resistance group two that powers on of the low pressure is contacted with the described 5th After device is connected in parallel, one end is connected with the controller, and another termination is soft to power on function selecting module;The low pressure is soft to power on electricity Resistance group one is connected with the soft resistance group two that powers on of the low pressure, the 4th contactor and the 5th contactor series connection.
5. electrical equipment as claimed in claim 4, which is characterized in that the input voltage measurement module includes:First input Voltage detecting branch, the second input voltage measurement branch, third input voltage measurement branch;
The first input voltage measurement branch includes:Eleventh resistor, twelfth resistor, the first transformer, the first amplifier, the 11 capacitances, the 12nd capacitance, the 14th resistance and the 15th resistance;
The eleventh resistor one terminates the input of A phase voltages, another described twelfth resistor one end of termination;
Another termination the first transformer input terminal 1 of the same name of twelfth resistor;
The first transformer output end 3 of the same name connects the first amplifier positive input, another input of the first transformer End 2 connects power input terminal, and another output end of first transformer 4 connects the first amplifier negative input and the described tenth Four resistance connecting pins;
The first amplifier output terminates the 15th resistance and the 14th resistance connecting pin;
Another termination controller voltage sample input terminal of 15th resistance;
One end of 11st capacitance is connect with the positive power source terminal of the first operational amplifier N1A and -5V power supplys respectively, the other end Ground connection;
One end of 12nd capacitance is connect with the negative power end of the first operational amplifier N1A and+5V power supplys respectively, the other end Ground connection;
The second input voltage measurement branch includes:21st resistance, the 22nd resistance, the second transformer, the second fortune It puts, the 21st capacitance, the 22nd capacitance, the 24th resistance and the 25th resistance;
The 21st resistance one termination B phase voltages input, another described 22nd resistance one end of termination;
Another termination the second transformer input terminal 1 of the same name of 22nd resistance;
The second transformer output end 3 of the same name connects the second amplifier positive input, another input of the second transformer End 2 connects power input terminal, and another output end of second transformer 4 connects the second amplifier negative input and described second 14 resistance connecting pins;
The second amplifier output terminates the 25th resistance and the 24th resistance connecting pin;
Another termination controller voltage sample input terminal of 25th resistance;
One end of 21st capacitance is connect with the positive power source terminal of second operational amplifier N2A and -5V power supplys respectively, another End ground connection;
One end of 22nd capacitance is connect with the negative power end of the first operational amplifier N2A and+5V power supplys respectively, another End ground connection;
The third input voltage measurement branch includes:31st resistance, the 32nd resistance, third transformer, third fortune It puts, the 31st capacitance, the 32nd capacitance, the 34th resistance and the 35th resistance;
The 31st resistance one termination C phase voltages input, another described 32nd resistance one end of termination;
Another termination third transformer input terminal 1 of the same name of 32nd resistance;
The third transformer output end 3 of the same name connects the third amplifier positive input, another input of third transformer End 2 connects power input terminal, and another output end of the third transformer 4 connects the third amplifier negative input and the third 14 resistance connecting pins;
The third amplifier output terminates the 35th resistance and the 34th resistance connecting pin;
Another termination controller voltage sample input terminal of 35th resistance;
One end of 31st capacitance is connect with the positive power source terminal of third operational amplifier N3A and -5V power supplys respectively, another End ground connection;
One end of 32nd capacitance is connect with the negative power end of third operational amplifier N3A and+5V power supplys respectively, another End ground connection.
6. the electrical equipment as described in any one of claim 4 or 5, which is characterized in that described soft to power on high-voltage section subpackage It includes:One soft upper electric control high voltage connector;Described soft upper electric control high voltage connector one end passes through high-voltage switch gear and high-voltage electricity Source busbar is connected, and the other end is electrically connected by high-voltage switch gear and three-phase alternating current.
CN201510612391.7A 2015-09-23 2015-09-23 A kind of high-voltage high-power frequency transformator and the electrical equipment with the frequency converter CN105207462B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510612391.7A CN105207462B (en) 2015-09-23 2015-09-23 A kind of high-voltage high-power frequency transformator and the electrical equipment with the frequency converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510612391.7A CN105207462B (en) 2015-09-23 2015-09-23 A kind of high-voltage high-power frequency transformator and the electrical equipment with the frequency converter

Publications (2)

Publication Number Publication Date
CN105207462A CN105207462A (en) 2015-12-30
CN105207462B true CN105207462B (en) 2018-07-31

Family

ID=54954960

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510612391.7A CN105207462B (en) 2015-09-23 2015-09-23 A kind of high-voltage high-power frequency transformator and the electrical equipment with the frequency converter

Country Status (1)

Country Link
CN (1) CN105207462B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5824990A (en) * 1996-01-11 1998-10-20 Illinois Tool Works Inc. Power selection and protection circuit for inverter power supply
CN201629677U (en) * 2010-04-03 2010-11-10 东方电子股份有限公司 Pre-charging circuit for high-voltage frequency converter using high-voltage technology
CN103647458A (en) * 2013-12-24 2014-03-19 苏州汇川技术有限公司 Frequency conversion system and method and device for precharging high-voltage frequency converter in frequency conversion system
CN104038032A (en) * 2014-05-26 2014-09-10 株洲变流技术国家工程研究中心有限公司 Low-voltage precharging system for high-voltage variable frequency system, and control method of low-voltage precharging system
CN205178867U (en) * 2015-09-23 2016-04-20 北京动力源科技股份有限公司 High -power converter of high pressure and have electrical equipment of this converter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5824990A (en) * 1996-01-11 1998-10-20 Illinois Tool Works Inc. Power selection and protection circuit for inverter power supply
CN201629677U (en) * 2010-04-03 2010-11-10 东方电子股份有限公司 Pre-charging circuit for high-voltage frequency converter using high-voltage technology
CN103647458A (en) * 2013-12-24 2014-03-19 苏州汇川技术有限公司 Frequency conversion system and method and device for precharging high-voltage frequency converter in frequency conversion system
CN104038032A (en) * 2014-05-26 2014-09-10 株洲变流技术国家工程研究中心有限公司 Low-voltage precharging system for high-voltage variable frequency system, and control method of low-voltage precharging system
CN205178867U (en) * 2015-09-23 2016-04-20 北京动力源科技股份有限公司 High -power converter of high pressure and have electrical equipment of this converter

Also Published As

Publication number Publication date
CN105207462A (en) 2015-12-30

Similar Documents

Publication Publication Date Title
CN104539042B (en) A kind of uninterruptible power system
CN102540070B (en) Control and detection circuit for four relays and detection method thereof
CN104682431B (en) Self-starting method and self-starting system of energy storage converter
CN106471704B (en) Uninterrupted power supply
CN107086547B (en) A kind of combined high-voltage dc circuit breaker and its self energizing method with self energizing ability
CN203415994U (en) Photovoltaic grid connected inversion system and photovoltaic power generation system equipped therewith
CN103828185A (en) Dual boost converter for ups system
CN102939714A (en) Voltage inverter and method of controlling such an inverter
CN104158282B (en) A kind of two-way switching control power circuit and high voltage converter
CN103269166A (en) Frequency converter with pre-charging protection function
CN100372208C (en) Three-phase unified electric energy quality controller without isolation link
CN103683468B (en) Power-supply system and the control method of power-supply system
CN103022978B (en) For the over under-voltage protection circuit of multiple pulse rectification circuit
CN205921399U (en) Transformer combined floodgate control system
CN101741095A (en) Automatic switching device for economic operation of power transformer
CN201374571Y (en) Online UPS
CN205178636U (en) Computer type high frequency switch DC power supply cabinet
CN102427233B (en) Power saving device with harmonic suppression and voltage stabilization functions
CN103647458A (en) Frequency conversion system and method and device for precharging high-voltage frequency converter in frequency conversion system
CN202717592U (en) Novel high-voltage starting device for polycrystalline silicon reducing furnace
CN203101556U (en) Multifunctional debugging trolley
CN202840669U (en) Commercial power-generated power dual-power-supply automatic/hand-operated transition power supply circuit
CN102946136A (en) Circuit and method for switching from power frequency of high-voltage inverter to variable frequency without disturbance
CN107650729A (en) The pre-charging device of the High-Voltage Electrical Appliances of new-energy automobile
CN101614795B (en) Default-phase signal detection circuit for three-phase power

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant