CN102983753A - High-voltage inverter with UPS (uninterrupted power supply) - Google Patents

Abstract

The invention discloses a high-voltage inverter with a UPS (uninterrupted power supply). The high-voltage inverter with the UPS comprises a three-phase transformer, 3*(2N+1) power units, a first DSP (digital signal processor), a second DSP (digital signal processor), an optical fiber communication module, a communication interface and a control panel, wherein the 3*(2N+1) power units are equally divided into three groups; 2N+1 power units in each group are serially connected to form each phase of the high-voltage inverter; and each power unit comprises a first rectifying circuit, a second rectifying circuit, a first charging circuit, a second charging circuit, a first supercapacitor bank, a second supercapacitor bank, a first DC/ DC (direct current/ direct current) converting circuit, a second DC/ DC converting circuit and an SPWM (sinusoidal pulse width modulation) three-level inverter circuit. The supercapacitor banks are added as energy storage mechanisms of the power units, so that the problems that the continuous operation of the conventional high-voltage inverter cannot be ensured and the conventional high-voltage inverter is shut down due to inconvenient production caused by sharp fall or short interruption of supply voltage are avoided.

Description

A kind of high voltage converter with UPS

Technical field

The present invention relates to a kind of high voltage converter with UPS.

Background technology

High voltage converter is to be applied to petrochemical industry, shipbuilding, the electric energy control device in the huge power consumption such as heavy-duty machinery and electric power energy field, development along with device for high-power power electronic such as the popularization of energy-saving and frequency-variable technology and IGBT, the application prospect of high voltage converter is also more and more wide, there are the following problems for existing high voltage converter: high voltage power supply is because thunderbolt, the situations such as short circuit and heavy load startup can cause the significant drop of supply voltage or even interrupt in short-term the several seconds, existing high voltage converter can not guarantee continuous operation and occur shutting down when the electric situation of aforesaid rolling occurs high voltage power supply, bring certain economic loss thereby impact is normally produced; Because the rectification of high voltage converter and the switching characteristic that inverter circuit has all used power electronic device, all can produce wave distortion at its input and output side, so that input harmonics has all caused injurious effects to electrical network and output harmonic wave to load, so the harmonic content of high voltage converter is the important parameter that determines its performance and effect; Adopt the Single-chip Controlling high voltage converter, disposal ability is limited, can not satisfy a large amount of need deal with data, real-time and high-precision requirement.

Summary of the invention

The present invention is directed to the proposition of above problem, a kind of voltage shock avoiding, harmonic carcellation disturb, the convenient and practical high voltage converter with UPS and develop;

Technological means of the present invention is as follows:

A kind of high voltage converter with UPS comprises:

Three-phase transformer; Described three-phase transformer has a plurality of secondary windings, and each connects respectively the input of arbitrary power cell the output of described per two secondary windings with triangle and star fashion;

3*(2N+1) individual power cell; Described 3*(2N+1) individual power cell is divided into three groups, every group of each phase that is consisted of respectively high voltage converter by 2N+1 power unit cascade, and N 〉=2 wherein, N represents the number of power cell; Described power cell comprises for the three-phase electricity of input being carried out rectification and obtains the three phase rectifier output dc voltage and carry out mutually the first rectification circuit and the second rectification circuit that rectification obtains the single-phase rectifier output dc voltage to three-phase electricity is arbitrary; The output negative terminal of described the first rectification circuit connects the three phase rectifier output plus terminal of the second rectification circuit; Described power cell also comprises the single-phase rectifier output that connects respectively the first rectification circuit and the second rectification circuit, is used for single-phase rectifier output dc voltage to the first rectification circuit and the input of the second rectification circuit and carries out behind the voltage transformation the first charging circuit and the second charging circuit to the charging of super capacitor group; The output that connects the first charging circuit is for the first super capacitor group of energy storage; The output that connects the second charging circuit is for the second super capacitor group of energy storage; Connect the first super capacitor group, be used for the DC/DC translation circuit that the voltage that the first super capacitor group is exported is boosted; Connect the second super capacitor group, be used for the 2nd DC/DC translation circuit that the voltage that the second super capacitor group is exported is boosted; The output negative terminal of a described DC/DC translation circuit is connected with the output plus terminal of the 2nd DC/DC translation circuit; The phase contact of described first, second DC/DC translation circuit connects the phase contact of described first, second rectification circuit; The output plus terminal of a described DC/DC translation circuit connects the three phase rectifier output plus terminal of the first rectification circuit by diode D13; Described the 2nd DC/DC translation circuit connects the output negative terminal of the second rectification circuit by diode D14; Connect the output negative terminal of the three phase rectifier output plus terminal of the first rectification circuit and the second rectification circuit as the both positive and negative polarity incoming end, be used for the SPWM tri-level inversion circuit that input voltage is carried out the DC-AC conversion;

Connect optical fiber communication modules, be used for the DSP that control super capacitor group discharges and recharges;

Connect optical fiber communication modules, be used for the 2nd DSP that power ratio control unit, treatment system fault and logic are judged;

Connect respectively a plurality of power cells, a DSP and the 2nd DSP, be used for the optical fiber communication modules of signal communication between a plurality of power cells and a DSP, the 2nd DSP;

Connect a DSP and the 2nd DSP, be used for the communication interface of frequency converter and external device communication;

Connect respectively a DSP, the 2nd DSP and communication interface, be used for the control panel that shows in real time the high voltage converter operating state and receive user's operation;

Further, described SPWM tri-level inversion circuit comprises the dividing potential drop branch road that is composed in series by capacitor C 1, capacitor C 2; Be connected by connecting the three level arm paths that power switch pipe Q5, Q6, Q7 and Q8 that the mode of collector electrode is connected in series consist of according to emitter successively by connecting power switch pipe Q1, Q2, Q3 and Q4 that the mode of collector electrode is connected in series according to emitter successively;

Further, the former limit winding of described three-phase transformer is connected with the three-phase high-voltage input by triangle manner;

Further, a described DSP and the 2nd DSP interconnect, backup each other, and have consisted of redundancy control system;

Further, described communication interface comprises serial communication interface, modulator-demodulator;

Further, an end of described capacitor C 1 connects capacitor C 2, and the other end of capacitor C 1 connects the three phase rectifier output plus terminal of the first rectification circuit, and the other end of described capacitor C 2 connects the output negative terminal of the second rectification circuit; The phase contact of described capacitor C 1, C2 connects the phase contact of described the first rectification circuit, the second rectification circuit;

Further, between the collector electrode of described power switch pipe Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8 and the emitter respectively reverse parallel connection sustained diode 1, D2, D3, D4, D5, D6, D7 and D8 are arranged;

Further, the collector electrode of described power switch pipe Q1, Q5 connects the three phase rectifier output plus terminal of the first rectification circuit; The emitter of described power switch pipe Q4, Q8 connects the output negative terminal of the second rectification circuit; The mutually contact of the phase contact of described power switch pipe Q2, Q3 and described power switch pipe Q6, Q7 goes between respectively as the output of power cell;

Further, described SPWM tri-level inversion circuit also comprises clamping diode D9, the D10 of series connection and clamping diode D11, the D12 of series connection; The negative electrode of the anodic bonding clamping diode D10 of described clamping diode D9; The negative electrode of the anodic bonding clamping diode D12 of described clamping diode D11; The negative electrode of described clamping diode D9 connects the phase contact of power switch pipe Q1, Q2; The anodic bonding power switch pipe Q3 of described clamping diode D10, the phase contact of Q4; The negative electrode of described clamping diode D11 connects the phase contact of power switch pipe Q5, Q6; The negative electrode of described clamping diode D12 connects the phase contact of power switch pipe Q7, Q8; The phase contact of described clamping diode D9, D10 be connected the phase contact of clamping diode D11, D12 and connect the phase contact of capacitor C 1, C2;

Further, described super capacitor group is comprised of a plurality of super capacitors;

Further, described the first to the 8th power switch pipe is IGBT.

Owing to adopted technique scheme, a kind of high voltage converter with UPS provided by the invention, by increasing the super capacitor group as the stored energy mechanism of power cell, utilize the ultracapacitor charging rate fast, service life cycle is long, the power density advantages of higher, so that when the electric situation of rolling appears in high voltage power supply the supply load that can release energy of the accumulator take the super capacitor group as core, avoided because significantly drop or interrupt in short-term and so that not only be convenient to produce and cause existing high voltage converter can not guarantee that the problem of shutdown appears in continuously operation of supply voltage; Power cell adopts SPWM tri-level inversion circuit and several power unit cascades stacks consisted of each phases of high voltage converters, eliminated effectively that harmonic wave of output voltage has solved existing high voltage converter because harmonic wave serious interference and electrical network and load are produced the problem of adverse effect; Discharge and recharge by being provided with DSP management super capacitor group, the 2nd DSP power ratio control unit, treatment system fault and logic are judged, and two DSP backup each other, consist of redundancy control system, not only control precision and arithmetic speed are much improved with respect to existing high voltage converter, and because of redundancy backup more safe and reliable; The present invention is convenient and practical, be suitable for extensive popularization.

Description of drawings

Fig. 1 is the structured flowchart of high voltage converter of the present invention;

Fig. 2 is the structured flowchart of power cell of the present invention;

Fig. 3 is the structural representation of three-phase transformer input and output of the present invention.

Embodiment

By reference to the accompanying drawings the present invention is elaborated:

Such as Fig. 1, Fig. 2 and the described a kind of high voltage converter with UPS of Fig. 3, comprising:

Three-phase transformer; Described three-phase transformer has a plurality of secondary windings, and each connects respectively the input of arbitrary power cell the output of described per two secondary windings with triangle and star fashion;

3*(2N+1) individual power cell; Described 3*(2N+1) individual power cell is divided into three groups, every group of each phase that is consisted of respectively high voltage converter by 2N+1 power unit cascade, and N 〉=2 wherein, N represents the number of power cell; Described power cell comprises for the three-phase electricity of input being carried out rectification and obtains the three phase rectifier output dc voltage and carry out mutually the first rectification circuit and the second rectification circuit that rectification obtains the single-phase rectifier output dc voltage to three-phase electricity is arbitrary; The output negative terminal of described the first rectification circuit connects the three phase rectifier output plus terminal of the second rectification circuit; Described power cell also comprises the single-phase rectifier output that connects respectively the first rectification circuit and the second rectification circuit, is used for single-phase rectifier output dc voltage to the first rectification circuit and the input of the second rectification circuit and carries out behind the voltage transformation the first charging circuit and the second charging circuit to the charging of super capacitor group; The output that connects the first charging circuit is for the first super capacitor group of energy storage; The output that connects the second charging circuit is for the second super capacitor group of energy storage; Connect the first super capacitor group, be used for the DC/DC translation circuit that the voltage that the first super capacitor group is exported is boosted; Connect the second super capacitor group, be used for the 2nd DC/DC translation circuit that the voltage that the second super capacitor group is exported is boosted; The output negative terminal of a described DC/DC translation circuit is connected with the output plus terminal of the 2nd DC/DC translation circuit; The phase contact of described first, second DC/DC translation circuit connects the phase contact of described first, second rectification circuit; The output plus terminal of a described DC/DC translation circuit connects the three phase rectifier output plus terminal of the first rectification circuit by diode D13; Described the 2nd DC/DC translation circuit connects the output negative terminal of the second rectification circuit by diode D14; Connect the output negative terminal of the three phase rectifier output plus terminal of the first rectification circuit and the second rectification circuit as the both positive and negative polarity incoming end, be used for the SPWM tri-level inversion circuit that input voltage is carried out the DC-AC conversion;

Connect optical fiber communication modules, be used for the DSP that control super capacitor group discharges and recharges;

Connect optical fiber communication modules, be used for the 2nd DSP that power ratio control unit, treatment system fault and logic are judged;

Connect respectively a plurality of power cells, a DSP and the 2nd DSP, be used for the optical fiber communication modules of signal communication between a plurality of power cells and a DSP, the 2nd DSP;

Connect a DSP and the 2nd DSP, be used for the communication interface of frequency converter and external device communication;

Connect respectively a DSP, the 2nd DSP and communication interface, be used for the control panel that shows in real time the high voltage converter operating state and receive user's operation;

Further, described SPWM tri-level inversion circuit comprises the dividing potential drop branch road that is composed in series by capacitor C 1, capacitor C 2; Be connected by connecting the three level arm paths that power switch pipe Q5, Q6, Q7 and Q8 that the mode of collector electrode is connected in series consist of according to emitter successively by connecting power switch pipe Q1, Q2, Q3 and Q4 that the mode of collector electrode is connected in series according to emitter successively; The former limit winding of described three-phase transformer is connected with the three-phase high-voltage input by triangle manner; A described DSP and the 2nd DSP interconnect, backup each other, and have consisted of redundancy control system; Described communication interface comprises serial communication interface, modulator-demodulator; One end of described capacitor C 1 connects capacitor C 2, and the other end of capacitor C 1 connects the three phase rectifier output plus terminal of the first rectification circuit, and the other end of described capacitor C 2 connects the output negative terminal of the second rectification circuit; The phase contact of described capacitor C 1, C2 connects the phase contact of described the first rectification circuit, the second rectification circuit; Between the collector electrode of described power switch pipe Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8 and the emitter respectively reverse parallel connection sustained diode 1, D2, D3, D4, D5, D6, D7 and D8 are arranged; The collector electrode of described power switch pipe Q1, Q5 connects the three phase rectifier output plus terminal of the first rectification circuit; The emitter of described power switch pipe Q4, Q8 connects the output negative terminal of the second rectification circuit; The mutually contact of the phase contact of described power switch pipe Q2, Q3 and described power switch pipe Q6, Q7 goes between respectively as the output of power cell; Described SPWM tri-level inversion circuit also comprises clamping diode D9, the D10 of series connection and clamping diode D11, the D12 of series connection; The negative electrode of the anodic bonding clamping diode D10 of described clamping diode D9; The negative electrode of the anodic bonding clamping diode D12 of described clamping diode D11; The negative electrode of described clamping diode D9 connects the phase contact of power switch pipe Q1, Q2; The anodic bonding power switch pipe Q3 of described clamping diode D10, the phase contact of Q4; The negative electrode of described clamping diode D11 connects the phase contact of power switch pipe Q5, Q6; The negative electrode of described clamping diode D12 connects the phase contact of power switch pipe Q7, Q8; The phase contact of described clamping diode D9, D10 be connected the phase contact of clamping diode D11, D12 and connect the phase contact of capacitor C 1, C2; Described super capacitor group is comprised of a plurality of super capacitors; Described the first to the 8th power switch pipe is IGBT.

When using this high voltage converter with UPS, high voltage converter is by 3*(2N+1) (N 〉=2 wherein, N represents the number of power cell) individual power cell formation, each power cell all is a single-phase three-level converter, each power cell is independently-powered, mutually series connection, so in every phase output voltage, obtain the Voltage-output of 2N+1 level, the former limit winding of three-phase transformer connects the three-phase high-voltage input by triangle manner, input voltage can be 3kV, 6kV or 10kV, three-phase transformer has a plurality of secondary windings, be divided into 24 through secondary behind the three-phase transformer voltage transformation, 30 or 40 groups of equivalent voltage, each connects respectively each power cell with triangle and star fashion the output of per two secondary windings, rectification circuit is comprised of two kinds of fixedly rectification module and controllable rectifier module, fixedly rectification module is comprised of the high-voltage large current diode, for the SPWM three-level inverter provides enough energy, controllable rectifier module is comprised of metal-oxide-semiconductor or the little current module of IGBT high voltage, its output dc voltage is exported to super capacitor group storage power through overcharge circuit, so that program control charges to guarantee the life-span of super capacitor group, the output of DC-DC translation circuit connects the input of SPWM three-level inverter when high voltage power supply rolling electricity or power failure, the super capacitor group releases energy and guarantees the high voltage converter continuous service, can adjust and select different super capacitor capacity according to different power-on times, discharging and recharging by DSP management control of super capacitor group, the carrier wave ratio F that gets the SPWM three-level inverter is 3, if adopt N SPWM three-level inverter to superpose, same carrier wave is all arranged than F and same modulation M mutually, carrier wave adopts same triangular wave U _C, the carrier wave triangular wave phase place of each SPWM three-level inverter lags behind successively

Carry out addition, N SPWM three-level inverter shares the stack that a sinusoidal modulation wave Us finishes the N step voltage, if constant amplitude at different levels, then $\mathrm{Vu}=U1+U2+\·\·\·\·\·\·+\mathrm{UN}=\underset{K=1}{\overset{N}{\mathrm{\Σ}}}\mathrm{Uk},$ In like manner $\mathrm{Vv}=\underset{K=1}{\overset{N}{\mathrm{\Σ}}}\mathrm{Uk},$ $\mathrm{Vw}=\underset{K=1}{\overset{N}{\mathrm{\Σ}}}\mathrm{Uk},$ The inverter that draws N sine pulse modulation is superimposed, and the result who obtains mutually for U, V, W is identical, the harmonic wave state of the output voltage of the existing phase wherein of deriving, if when carrier wave triangular wave initial phase angle of retard was α, its equation was:

2 π k≤w _cT＜2 π k+ π k=0, ± 1, ± equation of 2 modulating waves is:

2πk+π≤w _ct＜2πk+2π

us＝ _us?sin _wst

Order:

Carrier wave ratio, Modulation ratio, the fourier series equation of the output voltage U i of full-bridge single-phase (FBI) is:

$u1={\mathrm{MESin}}_{\mathrm{ws}}t+\frac{2E}{\mathrm{\π}}\underset{m=1}{\overset{\∞}{\mathrm{\Σ}}}\underset{n=\±1}{\overset{\±\∞}{\mathrm{\Σ}}}\cos m(\mathrm{\π}-\mathrm{\α})\frac{\mathrm{Jn}\left(\mathrm{mM\π}\right)}{m}$

$\mathrm{Sin}\left[{(\mathrm{mF}+n)}_{\mathrm{WS}}t\right]-\frac{2E}{\mathrm{\π}}\underset{m=1}{\overset{\∞}{\mathrm{\Σ}}}\underset{n=\±1}{\overset{\±\∞}{\mathrm{\Σ}}}\mathrm{Sinm}(\mathrm{\π}-\mathrm{\α})\frac{\mathrm{Jn}\left(\mathrm{mM\π}\right)}{m}$

To the direct overlapped in series of N single-phase full bridge (FBI) inverter, each triangular wave carrier initial phase is from FBI ₁Beginning lags behind successively

That is: FBI ₁: α=0

FBI ₂： $\mathrm{\α}=\frac{2\mathrm{\π}}{N}$

FBI ₃： $\mathrm{\α}=2\×\frac{2\mathrm{\π}}{N}$

FBI _N： $\mathrm{\α}=\frac{2\mathrm{\π}}{N}(N-1),$ The substitution following formula

$U1={\mathrm{MESin}}_{\mathrm{ws}}t+\frac{2E}{\mathrm{\π}}\underset{m=1}{\overset{\∞}{\mathrm{\Σ}}}\underset{n=\±1}{\overset{\±\∞}{\mathrm{\Σ}}}\cos m(\mathrm{\π}-0^0)\frac{\mathrm{Jn}\left(\mathrm{mM\π}\right)}{m}$

$\·\mathrm{Sin}\left[{(\mathrm{mF}+n)}_{\mathrm{ws}}t\right]-\frac{2E}{\mathrm{\π}}\underset{m=1}{\overset{\∞}{\mathrm{\Σ}}}\underset{n=\±1}{\overset{\±\∞}{\mathrm{\Σ}}}\mathrm{Sinm}(\mathrm{\π}-0^0)\frac{\mathrm{Jn}\left(\mathrm{mM\π}\right)}{m}\·\cos \left[(\mathrm{mF}+n)w_{s}t\right]$

$U_2={\mathrm{MESinw}}_{s}t+\frac{2E}{\mathrm{\π}}\underset{m=1}{\overset{\∞}{\mathrm{\Σ}}}\underset{n=\±1}{\overset{\±\∞}{\mathrm{\Σ}}}\cos m(\mathrm{\π}-\frac{2\mathrm{\π}}{N})\frac{J_n\left(\mathrm{mM\π}\right)}{m}$

$\·\mathrm{Sin}\left[{(\mathrm{mF}+n)w}_{s}t\right]-\frac{2E}{\mathrm{\π}}\underset{m=1}{\overset{\∞}{\mathrm{\Σ}}}\underset{n=\±1}{\overset{\±\∞}{\mathrm{\Σ}}}\mathrm{Sinm}(\mathrm{\π}-\frac{2\mathrm{\π}}{N})\frac{J_n\left(\mathrm{mM\π}\right)}{m}\·\cos \left[(\mathrm{mF}+n)w_{s}t\right]$

$U_N={\mathrm{MESinw}}_{s}t+\frac{2E}{\mathrm{\π}}\underset{m=1}{\overset{\∞}{\mathrm{\Σ}}}\underset{n=\±1}{\overset{\±\∞}{\mathrm{\Σ}}}\cos m\left[\mathrm{\π}-\frac{2\mathrm{\π}}{N}(N-1)\right]\frac{J_n\left(\mathrm{mM\π}\right)}{m}\mathrm{Sin}\left[(\mathrm{mF}+n)w_{s}t\right]$

$-\frac{2E}{\mathrm{\π}}\underset{m=1}{\overset{\∞}{\mathrm{\Σ}}}\underset{n=\±1}{\overset{\±\∞}{\mathrm{\Σ}}}\mathrm{Sinm}\left[\mathrm{\π}-\frac{2\mathrm{\π}}{N}(N-1)\right]\frac{J_n\left(\mathrm{mM\π}\right)}{m}\·\cos \left[(\mathrm{mF}+n)w_{s}t\right]$

Because U ₁, U2, U _NDeng, identical first-harmonic is arranged, simultaneously

$\mathrm{Sinm}(\mathrm{\π}-0^0)+\mathrm{Sinm}(\mathrm{\π}-\frac{2\mathrm{\π}}{N})+\·\·\·\·\·\·+\mathrm{Sinm}[\mathrm{\π}-\frac{2\mathrm{\π}}{N}(N-1)]=0$

$\cos m(\mathrm{\π}-0^0)+\cos m(\mathrm{\π}-\frac{2\mathrm{\π}}{N})+\·\·\·\·\·\·+\cos m[\mathrm{\π}-\frac{2\mathrm{\π}}{N}(N-1)]=\±N$

So phase output voltage U v is

$u_v=u_1+u_2+\·\·\·\·\·\·+u_N$

$={\mathrm{NMESinw}}_{s}t\±\frac{2E}{\mathrm{\π}}\underset{m=1}{\overset{\∞}{\mathrm{\Σ}}}\underset{n=\±1}{\overset{\±\∞}{\mathrm{\Σ}}}\frac{J_n\left(\mathrm{mM\π}\right)}{m}\×\mathrm{Sin}\left[(\mathrm{mF}+n)w_{s}t\right]$

Because at different levels is independently-powered, mutual series connection, so in U phase output voltage, get the Voltage-output of 2N+1 level.In dual the Fourier series conversion, can eliminate the harmonic wave below NF ± 1 time, can get following results according to above theory: with the FBI of N SPWN, by lag behind the successively direct overlapped in series at 2 π/N phase angle of carrier wave triangular wave, can effectively eliminate low-order harmonic.And be used for solving many that withstand voltage and simple SPWM method is used for that the solution pressure regulation will be good more than the simple addition method.For example:

The time will eliminate 100 * 7 ± 1 subharmonic during N=7, the present invention can voltage shock avoiding and power failure of short duration, the power supply cleaning is stable simultaneously, has overcome the high order harmonic component interference, therefore need not to increase filter circuit at input and output; And reduced switching abnormal voltage, can be used to directly control the current standard motor, owing to there are not stress and soft start can protect to greatest extent motor safety; Efficient of the present invention is high, need not power factor compensation, and switching circuit is that core consists of by IGBT, and it drives signal by the optical fiber communication modules transmission, and is safe and reliable.

A kind of high voltage converter with UPS provided by the invention, by increasing the super capacitor group as the stored energy mechanism of power cell, utilize that the ultracapacitor charging rate is fast, service life cycle is long, the power density advantages of higher, so that when the electric situation of rolling appears in high voltage power supply the supply load that can release energy of the accumulator take the super capacitor group as core, avoided because significantly drop or interrupt in short-term and so that not only be convenient to produce and cause existing high voltage converter can not guarantee that the problem of shutdown appears in continuously operation of supply voltage; Power cell adopts SPWM tri-level inversion circuit and several power unit cascades stacks consisted of each phases of high voltage converters, eliminated effectively that harmonic wave of output voltage has solved existing high voltage converter because harmonic wave serious interference and electrical network and load are produced the problem of adverse effect; Discharge and recharge by being provided with DSP management super capacitor group, the 2nd DSP power ratio control unit, treatment system fault and logic are judged, and two DSP backup each other, consist of redundancy control system, not only control precision and arithmetic speed are much improved with respect to existing high voltage converter, and because of redundancy backup more safe and reliable; The present invention is convenient and practical, be suitable for extensive popularization.

The above; only be the better embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.

Claims (9)

1. high voltage converter with UPS is characterized in that comprising:

Three-phase transformer; Described three-phase transformer has a plurality of secondary windings, and each connects respectively the input of arbitrary power cell the output of described per two secondary windings with triangle and star fashion;

3*(2N+1) individual power cell; Described 3*(2N+1) individual power cell is divided into three groups, every group of each phase that is consisted of respectively high voltage converter by 2N+1 power unit cascade, and N 〉=2 wherein, N represents the number of power cell; Described power cell comprises for the three-phase electricity of input being carried out rectification and obtains the three phase rectifier output dc voltage and carry out mutually the first rectification circuit and the second rectification circuit that rectification obtains the single-phase rectifier output dc voltage to three-phase electricity is arbitrary; The output negative terminal of described the first rectification circuit connects the three phase rectifier output plus terminal of the second rectification circuit; Described power cell also comprises the single-phase rectifier output that connects respectively the first rectification circuit and the second rectification circuit, is used for single-phase rectifier output dc voltage to the first rectification circuit and the input of the second rectification circuit and carries out behind the voltage transformation the first charging circuit and the second charging circuit to the charging of super capacitor group; The output that connects the first charging circuit is for the first super capacitor group of energy storage; The output that connects the second charging circuit is for the second super capacitor group of energy storage; Connect the first super capacitor group, be used for the DC/DC translation circuit that the voltage that the first super capacitor group is exported is boosted; Connect the second super capacitor group, be used for the 2nd DC/DC translation circuit that the voltage that the second super capacitor group is exported is boosted; The output negative terminal of a described DC/DC translation circuit is connected with the output plus terminal of the 2nd DC/DC translation circuit; The phase contact of described first, second DC/DC translation circuit connects the phase contact of described first, second rectification circuit; The output plus terminal of a described DC/DC translation circuit connects the three phase rectifier output plus terminal of the first rectification circuit by diode D13; Described the 2nd DC/DC translation circuit connects the output negative terminal of the second rectification circuit by diode D14; Connect the output negative terminal of the three phase rectifier output plus terminal of the first rectification circuit and the second rectification circuit as the both positive and negative polarity incoming end, be used for the SPWM tri-level inversion circuit that input voltage is carried out the DC-AC conversion;

Connect optical fiber communication modules, be used for the DSP that control super capacitor group discharges and recharges;

Connect optical fiber communication modules, be used for the 2nd DSP that power ratio control unit, treatment system fault and logic are judged;

Connect respectively a plurality of power cells, a DSP and the 2nd DSP, be used for the optical fiber communication modules of signal communication between a plurality of power cells and a DSP, the 2nd DSP;

Connect a DSP and the 2nd DSP, be used for the communication interface of frequency converter and external device communication;

Connect respectively a DSP, the 2nd DSP and communication interface, be used for the control panel that shows in real time the high voltage converter operating state and receive user's operation.

2. a kind of high voltage converter with UPS according to claim 1 is characterized in that described SPWM tri-level inversion circuit comprises the dividing potential drop branch road that is composed in series by capacitor C 1, capacitor C 2; Be connected by connecting the three level arm paths that power switch pipe Q5, Q6, Q7 and Q8 that the mode of collector electrode is connected in series consist of according to emitter successively by connecting power switch pipe Q1, Q2, Q3 and Q4 that the mode of collector electrode is connected in series according to emitter successively.

3. a kind of high voltage converter with UPS according to claim 1 is characterized in that the former limit winding of described three-phase transformer is connected with the three-phase high-voltage input by triangle manner.

4. a kind of high voltage converter with UPS according to claim 1 is characterized in that a described DSP and the 2nd DSP interconnect, backup each other, and have consisted of redundancy control system.

5. a kind of high voltage converter with UPS according to claim 1 is characterized in that described communication interface comprises serial communication interface, modulator-demodulator.

6. a kind of high voltage converter with UPS according to claim 2, an end that it is characterized in that described capacitor C 1 connects capacitor C 2, the other end of capacitor C 1 connects the three phase rectifier output plus terminal of the first rectification circuit, and the other end of described capacitor C 2 connects the output negative terminal of the second rectification circuit; The phase contact of described capacitor C 1, C2 connects the phase contact of described the first rectification circuit, the second rectification circuit.

7. a kind of high voltage converter with UPS according to claim 2 is characterized in that between the collector electrode of described power switch pipe Q1, Q2, Q3, Q4, Q5, Q6, Q7 and Q8 and the emitter that reverse parallel connection has sustained diode 1, D2, D3, D4, D5, D6, D7 and D8 respectively.

8. a kind of high voltage converter with UPS according to claim 2 is characterized in that the collector electrode of described power switch pipe Q1, Q5 connects the three phase rectifier output plus terminal of the first rectification circuit; The emitter of described power switch pipe Q4, Q8 connects the output negative terminal of the second rectification circuit; The phase contact of described power switch pipe Q2, Q3 goes between respectively as the output of power cell with the mutually contact of described power switch pipe Q6, Q7.

9. a kind of high voltage converter with UPS according to claim 6 is characterized in that described SPWM tri-level inversion circuit also comprises clamping diode D9, the D10 of series connection and clamping diode D11, the D12 of series connection; The negative electrode of the anodic bonding clamping diode D10 of described clamping diode D9; The negative electrode of the anodic bonding clamping diode D12 of described clamping diode D11; The negative electrode of described clamping diode D9 connects the phase contact of power switch pipe Q1, Q2; The anodic bonding power switch pipe Q3 of described clamping diode D10, the phase contact of Q4; The negative electrode of described clamping diode D11 connects the phase contact of power switch pipe Q5, Q6; The negative electrode of described clamping diode D12 connects the phase contact of power switch pipe Q7, Q8; The phase contact of described clamping diode D9, D10 be connected the phase contact of clamping diode D11, D12 and connect the phase contact of capacitor C 1, C2.

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