CN102983753B - A kind of high voltage converter with UPS - Google Patents

Abstract

The invention discloses a kind of high voltage converter with UPS, comprising: three-phase transformer, 3*(2N+1) individual power cell, a DSP, the 2nd DSP, optical fiber communication modules, communication interface and control panel; Described 3*(2N+1) individual power cell is divided into three groups, often organizes each phase being made up of high voltage converter respectively 2N+1 power unit cascade; Described power cell first rectification circuit, the second rectification circuit, the first charging circuit, the second charging circuit, the first super capacitor group, the second super capacitor group, a DC/DC translation circuit, the 2nd DC/DC translation circuit and SPWM three-level inverter circuit; The present invention, by increasing the super capacitor group stored energy mechanism as power cell, avoids because supply voltage significantly drops or short interruptions and make not only to be convenient to produce and cause existing high voltage converter can not ensure to run continuously and occur the problem of shutting down.

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 applied to petrochemical industry, shipbuilding, the electric energy control device in the huge power consumption field such as heavy-duty machinery and electric power energy, along with the development of the device for high-power power electronic such as popularization and IGBT of energy-saving and frequency-variable technology, 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 due to thunderbolt, the situations such as short circuit and heavy load startup can cause supply voltage significantly to drop or even the short interruptions several seconds, existing high voltage converter can not ensure to run continuously when the electric situation of rolling as above occurs high voltage power supply and occur shutting down, thus impact is normally produced and brings certain economic loss, because the rectification of high voltage converter and inverter circuit all employ the switching characteristic of power electronic device, all wave distortion can be produced at its input and output side, input harmonics is made all to cause injurious effects to electrical network and output harmonic wave to load, so the harmonic content of high voltage converter is the important parameter determining its performance and application effect, adopt Single-chip Controlling high voltage converter, disposal ability is limited, and can not meet a large amount of needs deal with data, real-time and high-precision requirement.

Summary of the invention

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

Technological means of the present invention is as follows:

With a high voltage converter of UPS, comprising:

Three-phase transformer; Described three-phase transformer has multiple vice-side winding, and the output of described every two vice-side winding is respectively connected the input of arbitrary power cell respectively with triangle and star fashion;

3*(2N+1) individual power cell; Described 3*(2N+1) individual power cell is divided into three groups, and often organize each phase being made up of high voltage converter respectively 2N+1 power unit cascade, wherein N >=2, N represents the number of power cell; Described power cell comprises for carrying out rectification and obtain three phase rectifier output dc voltage to the three-phase electricity of input and carry out to arbitrary in three-phase electricity the first rectification circuit and the second rectification circuit that rectification obtains single-phase rectifier output dc voltage mutually; The output negative terminal of described 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 connecting the first rectification circuit and the second rectification circuit respectively, for carrying out after voltage transformation the first charging circuit of super capacitor group charging and the second charging circuit the single-phase rectifier output dc voltage of the first rectification circuit and the input of the second rectification circuit; Connect the output of the first charging circuit, for the first super capacitor group of energy storage; Connect the output of the second charging circuit, for the second super capacitor group of energy storage; Connect the first super capacitor group, the voltage for the first super capacitor group being exported carries out the DC/DC translation circuit boosted; Connect the second super capacitor group, the voltage for the second super capacitor group being exported carries out the 2nd DC/DC translation circuit 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 first, second DC/DC translation circuit described connects the phase contact of first, second rectification circuit described; 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 2nd DC/DC translation circuit connects the output negative terminal of the second rectification circuit by diode D14; The output negative terminal of the three phase rectifier output plus terminal and the second rectification circuit that connect the first rectification circuit as both positive and negative polarity incoming end, for input voltage being carried out the SPWM three-level inverter circuit of DC-AC conversion;

Connecting fiber communication module, for controlling a DSP of super capacitor group discharge and recharge;

Connecting fiber communication module, for controlling the 2nd DSP of power cell, treatment system fault and Logic judgment;

Connect multiple power cell, a DSP and the 2nd DSP respectively, for multiple power cell and between a DSP, the 2nd DSP signal communication optical fiber communication modules;

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

Connect a DSP, the 2nd DSP and communication interface respectively, for showing the control panel of high voltage converter operating state and reception user operation in real time;

Further, described SPWM three-level inverter circuit comprises the dividing potential drop branch road be composed in series by electric capacity C1, electric capacity C2; By connecting according to emitter the three level arm path that power switch pipe Q1, Q2, Q3 that the mode of collector electrode is connected in series and Q4 and power switch pipe Q5, Q6, Q7 and Q8 of being connected in series by the mode being connected collector electrode according to emitter successively form successively;

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

Further, a described DSP and the 2nd DSP is interconnected, backups each other, and constitutes redundancy control system;

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

Further, one end of described electric capacity C1 connects electric capacity C2, and the other end of electric capacity C1 connects the three phase rectifier output plus terminal of the first rectification circuit, and the other end of described electric capacity C2 connects the output negative terminal of the second rectification circuit; The phase contact of described electric capacity C1, C2 connects the phase contact of described 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 emitter, reverse parallel connection has sustained diode 1, D2, D3, D4, D5, D6, D7 and D8 respectively;

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 phase contact of described power switch pipe Q2, Q3 and the phase contact of described power switch pipe Q6, Q7 go between as the output of power cell respectively;

Further, described SPWM three-level inverter circuit also comprises clamping diode D9, D10 of series connection and clamping diode D11, D12 of series connection; The anode of described clamping diode D9 connects the negative electrode of clamping diode D10; The anode of described clamping diode D11 connects the negative electrode of clamping diode D12; The negative electrode of described clamping diode D9 connects the phase contact of power switch pipe Q1, Q2; The anode of described clamping diode D10 connects the phase contact of power switch pipe Q3, 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 is connected the phase contact of electric capacity C1, C2 with the phase contact of described clamping diode D11, D12;

Further, described super capacitor group is made up of multiple super capacitor;

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

Owing to have employed technique scheme, a kind of high voltage converter with UPS provided by the invention, by increasing the stored energy mechanism of super capacitor group as power cell, utilize ultracapacitor charging rate fast, service life cycle is long, power density advantages of higher, make can to release energy supply load with the super capacitor group accumulator that is core when high voltage power supply occurs shaking electric situation, avoid and significantly to drop due to supply voltage or short interruptions and making not only is convenient to produce and is caused existing high voltage converter can not ensure to run continuously and occur the problem of shutting down, power cell adopts SPWM three-level inverter circuit and the superposition of several power unit cascades is formed each phase of high voltage converter, effectively eliminates harmonic wave of output voltage and solves existing high voltage converter produces adverse effect to electrical network and load problem due to harmonic wave serious interference, the discharge and recharge of super capacitor group is managed by being provided with a DSP, 2nd DSP controls power cell, treatment system fault and Logic judgment, and two CSTR backups each other, form redundancy control system, not only control precision and arithmetic speed are much improved relative to existing high voltage converter, and more safe and reliable because of redundancy backup, the present invention is convenient and practical, be suitable for extensive popularization.

Accompanying drawing explanation

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:

As shown in Figure 1, Figure 2 with a kind of high voltage converter with UPS described in Fig. 3, comprising:

Three-phase transformer; Described three-phase transformer has multiple vice-side winding, and the output of described every two vice-side winding is respectively connected the input of arbitrary power cell respectively with triangle and star fashion;

3*(2N+1) individual power cell; Described 3*(2N+1) individual power cell is divided into three groups, and often organize each phase being made up of high voltage converter respectively 2N+1 power unit cascade, wherein N >=2, N represents the number of power cell; Described power cell comprises for carrying out rectification and obtain three phase rectifier output dc voltage to the three-phase electricity of input and carry out to arbitrary in three-phase electricity the first rectification circuit and the second rectification circuit that rectification obtains single-phase rectifier output dc voltage mutually; The output negative terminal of described 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 connecting the first rectification circuit and the second rectification circuit respectively, for carrying out after voltage transformation the first charging circuit of super capacitor group charging and the second charging circuit the single-phase rectifier output dc voltage of the first rectification circuit and the input of the second rectification circuit; Connect the output of the first charging circuit, for the first super capacitor group of energy storage; Connect the output of the second charging circuit, for the second super capacitor group of energy storage; Connect the first super capacitor group, the voltage for the first super capacitor group being exported carries out the DC/DC translation circuit boosted; Connect the second super capacitor group, the voltage for the second super capacitor group being exported carries out the 2nd DC/DC translation circuit 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 first, second DC/DC translation circuit described connects the phase contact of first, second rectification circuit described; 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 2nd DC/DC translation circuit connects the output negative terminal of the second rectification circuit by diode D14; The output negative terminal of the three phase rectifier output plus terminal and the second rectification circuit that connect the first rectification circuit as both positive and negative polarity incoming end, for input voltage being carried out the SPWM three-level inverter circuit of DC-AC conversion;

Connecting fiber communication module, for controlling a DSP of super capacitor group discharge and recharge;

Connecting fiber communication module, for controlling the 2nd DSP of power cell, treatment system fault and Logic judgment;

Connect multiple power cell, a DSP and the 2nd DSP respectively, for multiple power cell and between a DSP, the 2nd DSP signal communication optical fiber communication modules;

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

Connect a DSP, the 2nd DSP and communication interface respectively, for showing the control panel of high voltage converter operating state and reception user operation in real time;

Further, described SPWM three-level inverter circuit comprises the dividing potential drop branch road be composed in series by electric capacity C1, electric capacity C2; By connecting according to emitter the three level arm path that power switch pipe Q1, Q2, Q3 that the mode of collector electrode is connected in series and Q4 and power switch pipe Q5, Q6, Q7 and Q8 of being connected in series by the mode being connected collector electrode according to emitter successively form successively; The former limit winding of described three-phase transformer is connected with three-phase high-voltage input by triangle manner; A described DSP and the 2nd DSP is interconnected, backups each other, and constitutes redundancy control system; Described communication interface comprises serial communication interface, modulator-demodulator; One end of described electric capacity C1 connects electric capacity C2, and the other end of electric capacity C1 connects the three phase rectifier output plus terminal of the first rectification circuit, and the other end of described electric capacity C2 connects the output negative terminal of the second rectification circuit; The phase contact of described electric capacity C1, C2 connects the phase contact of described 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 emitter, reverse parallel connection has sustained diode 1, D2, D3, D4, D5, D6, D7 and D8 respectively; 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 and the phase contact of described power switch pipe Q6, Q7 go between as the output of power cell respectively; Described SPWM three-level inverter circuit also comprises clamping diode D9, D10 of series connection and clamping diode D11, D12 of series connection; The anode of described clamping diode D9 connects the negative electrode of clamping diode D10; The anode of described clamping diode D11 connects the negative electrode of clamping diode D12; The negative electrode of described clamping diode D9 connects the phase contact of power switch pipe Q1, Q2; The anode of described clamping diode D10 connects the phase contact of power switch pipe Q3, 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 is connected the phase contact of electric capacity C1, C2 with the phase contact of described clamping diode D11, D12; Described super capacitor group is made up of multiple super capacitor; Described 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) (wherein N>=2, N represents the number of power cell) individual power cell formation, each power cell is all a single-phase three-level converter, each power cell is independently-powered, mutual series connection, so the voltage obtaining 2N+1 level in every phase output voltage exports, the former limit winding of three-phase transformer connects three-phase high-voltage input by triangle manner, input voltage can be 3kV, 6kV or 10kV, three-phase transformer has multiple vice-side winding, secondaryly after three-phase transformer voltage transformation be divided into 24, 30 or 40 groups of equivalent voltage, the output of every two vice-side winding is respectively connected each power cell with triangle with star fashion respectively, rectification circuit is by fixing rectification module and controllable rectifier module two kinds forms, fixing rectification module is made up of high-voltage large current diode, for SPWM three-level inverter provides enough energy, controllable rectifier module is made up of metal-oxide-semiconductor or IGBT high voltage small area analysis module, its output dc voltage exports to super capacitor group storage power through overcharge circuit, so that program control charging is with the life-span ensureing super capacitor group, when high voltage power supply shakes electricity or power failure, the output of DC-DC conversion circuit connects the input of SPWM three-level inverter, super capacitor group releases energy and ensures high voltage converter continuous service, can adjust and select different super capacitor capacity according to different power-on times, the discharge and recharge of super capacitor group is managed by a DSP and controls, the carrier wave ratio F getting SPWM three-level inverter is 3, superpose according to N number of SPWM three-level inverter, all there is same carrier wave than F and phase same modulation M, carrier wave adopts same triangular wave U _c, the carrier triangular wave phase of each SPWM three-level inverter is delayed successively be added, N number of SPWM three-level inverter shares the superposition that a sinusoidal modulation wave Us completes 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 $\mathrm{Vv}=\underset{K=1}{\overset{N}{\mathrm{\Σ}}}\mathrm{Uk},$ $\mathrm{Vw}=\underset{K=1}{\overset{N}{\mathrm{\Σ}}}\mathrm{Uk},$ Show that the inverter that N number of sine pulse is modulated is superimposed, the result obtained for U, V, W phase is identical, the harmonic wave state of the output voltage of an existing phase of deriving wherein, if when carrier triangular wave initial phase angle of retard is α, its equation is:

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

2πk+π≤w _ct＜2πk+2π

us＝ _ussin _wst

Order: carrier wave ratio, modulation ratio, the fourier series equation of the output voltage Ui of full-bridge single-phase (FBI) is:

$u1={\mathrm{MESin}}_{\mathrm{ws}}t+\frac{2E}{\mathrm{\&pi;}}\underset{m=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}\underset{n=\&PlusMinus;1}{\overset{\&PlusMinus;\&infin;}{\mathrm{\&Sigma;}}}\cos m(\mathrm{\&pi;}-\mathrm{\&alpha;})\frac{\mathrm{Jn}\left(\mathrm{mM\&pi;}\right)}{m}$

$\mathrm{Sin}\left[{(\mathrm{mF}+n)}_{\mathrm{WS}}t\right]-\frac{2E}{\mathrm{\&pi;}}\underset{m=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}\underset{n=\&PlusMinus;1}{\overset{\&PlusMinus;\&infin;}{\mathrm{\&Sigma;}}}\mathrm{Sinm}(\mathrm{\&pi;}-\mathrm{\&alpha;})\frac{\mathrm{Jn}\left(\mathrm{mM\&pi;}\right)}{m}$

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

That is: FBI ₁: α=0

FBI ₂： $\mathrm{\&alpha;}=\frac{2\mathrm{\&pi;}}{N}$

FBI ₃： $\mathrm{\&alpha;}=2\&times;\frac{2\mathrm{\&pi;}}{N}$

FBI _N： $\mathrm{\&alpha;}=\frac{2\mathrm{\&pi;}}{N}(N-1),$ Substitute into above formula

$U1={\mathrm{MESin}}_{\mathrm{ws}}t+\frac{2E}{\mathrm{\&pi;}}\underset{m=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}\underset{n=\&PlusMinus;1}{\overset{\&PlusMinus;\&infin;}{\mathrm{\&Sigma;}}}\cos m(\mathrm{\&pi;}-0^0)\frac{\mathrm{Jn}\left(\mathrm{mM\&pi;}\right)}{m}$

$\&CenterDot;\mathrm{Sin}\left[{(\mathrm{mF}+n)}_{\mathrm{ws}}t\right]-\frac{2E}{\mathrm{\&pi;}}\underset{m=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}\underset{n=\&PlusMinus;1}{\overset{\&PlusMinus;\&infin;}{\mathrm{\&Sigma;}}}\mathrm{Sinm}(\mathrm{\&pi;}-0^0)\frac{\mathrm{Jn}\left(\mathrm{mM\&pi;}\right)}{m}\&CenterDot;\cos \left[(\mathrm{mF}+n)w_{s}t\right]$

$U_2={\mathrm{MESinw}}_{s}t+\frac{2E}{\mathrm{\&pi;}}\underset{m=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}\underset{n=\&PlusMinus;1}{\overset{\&PlusMinus;\&infin;}{\mathrm{\&Sigma;}}}\cos m(\mathrm{\&pi;}-\frac{2\mathrm{\&pi;}}{N})\frac{J_n\left(\mathrm{mM\&pi;}\right)}{m}$

$\&CenterDot;\mathrm{Sin}\left[{(\mathrm{mF}+n)w}_{s}t\right]-\frac{2E}{\mathrm{\&pi;}}\underset{m=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}\underset{n=\&PlusMinus;1}{\overset{\&PlusMinus;\&infin;}{\mathrm{\&Sigma;}}}\mathrm{Sinm}(\mathrm{\&pi;}-\frac{2\mathrm{\&pi;}}{N})\frac{J_n\left(\mathrm{mM\&pi;}\right)}{m}\&CenterDot;\cos \left[(\mathrm{mF}+n)w_{s}t\right]$

$U_N={\mathrm{MESinw}}_{s}t+\frac{2E}{\mathrm{\&pi;}}\underset{m=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}\underset{n=\&PlusMinus;1}{\overset{\&PlusMinus;\&infin;}{\mathrm{\&Sigma;}}}\cos m\left[\mathrm{\&pi;}-\frac{2\mathrm{\&pi;}}{N}(N-1)\right]\frac{J_n\left(\mathrm{mM\&pi;}\right)}{m}\mathrm{Sin}\left[(\mathrm{mF}+n)w_{s}t\right]$

$-\frac{2E}{\mathrm{\&pi;}}\underset{m=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}\underset{n=\&PlusMinus;1}{\overset{\&PlusMinus;\&infin;}{\mathrm{\&Sigma;}}}\mathrm{Sinm}\left[\mathrm{\&pi;}-\frac{2\mathrm{\&pi;}}{N}(N-1)\right]\frac{J_n\left(\mathrm{mM\&pi;}\right)}{m}\&CenterDot;\cos \left[(\mathrm{mF}+n)w_{s}t\right]$

Due to U ₁, U2, U _ndeng, there is identical first-harmonic, simultaneously

$\mathrm{Sinm}(\mathrm{\&pi;}-0^0)+\mathrm{Sinm}(\mathrm{\&pi;}-\frac{2\mathrm{\&pi;}}{N})+\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;+\mathrm{Sinm}[\mathrm{\&pi;}-\frac{2\mathrm{\&pi;}}{N}(N-1)]=0$

$\cos m(\mathrm{\&pi;}-0^0)+\cos m(\mathrm{\&pi;}-\frac{2\mathrm{\&pi;}}{N})+\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;+\cos m[\mathrm{\&pi;}-\frac{2\mathrm{\&pi;}}{N}(N-1)]=\&PlusMinus;N$

So phase output voltage Uv is

$u_v=u_1+u_2+\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;\&CenterDot;+u_N$

$={\mathrm{NMESinw}}_{s}t\&PlusMinus;\frac{2E}{\mathrm{\&pi;}}\underset{m=1}{\overset{\&infin;}{\mathrm{\&Sigma;}}}\underset{n=\&PlusMinus;1}{\overset{\&PlusMinus;\&infin;}{\mathrm{\&Sigma;}}}\frac{J_n\left(\mathrm{mM\&pi;}\right)}{m}\&times;\mathrm{Sin}\left[(\mathrm{mF}+n)w_{s}t\right]$

Due at different levels be independently-powered, mutually connect, therefore in U phase output voltage 2N+1 level voltage output.The harmonic wave of below NF ± 1 time can be eliminated in the conversion of dual the Fourier series, following results can be obtained: with the FBI of N number of SPWN according to above theory, by the direct overlapped in series of carrier triangular wave successively delayed 2 π/N phase angles, effectively low-order harmonic can be eliminated.And it is good many for solving pressure regulation for solving withstand voltage and simple SPWM method more than the simple addition method.Such as: time N=7 time by elimination 100 × 7 ± 1 subharmonic, the present invention can voltage shock avoiding and power failure of short duration, and power supply is clean stable simultaneously, overcomes high order harmonic component interference, therefore at input and output without the need to increasing filter circuit; And reduce switching abnormal voltage, can be used to directly control current standard motor, motor safety can be protected to greatest extent owing to there is no stress and soft start; Efficiency of the present invention is high, and without the need to power factor compensation, and switching circuit is that core is formed by IGBT, and its drive singal is transmitted by optical fiber communication modules, safe and reliable.

A kind of high voltage converter with UPS provided by the invention, by increasing the stored energy mechanism of super capacitor group as power cell, utilize that ultracapacitor charging rate is fast, service life cycle is long, power density advantages of higher, make can to release energy supply load with the super capacitor group accumulator that is core when high voltage power supply occurs shaking electric situation, avoid because supply voltage significantly drops or short interruptions and make not only to be convenient to produce and cause existing high voltage converter can not ensure to run continuously and occur the problem of shutting down; Power cell adopts SPWM three-level inverter circuit and the superposition of several power unit cascades is formed each phase of high voltage converter, effectively eliminates harmonic wave of output voltage and solves existing high voltage converter produces adverse effect to electrical network and load problem due to harmonic wave serious interference; The discharge and recharge of super capacitor group is managed by being provided with a DSP, 2nd DSP controls power cell, treatment system fault and Logic judgment, and two CSTR backups each other, form redundancy control system, not only control precision and arithmetic speed are much improved relative to existing high voltage converter, and more safe and reliable because of redundancy backup; The present invention is convenient and practical, be suitable for extensive popularization.

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

Claims (8)

1., with a high voltage converter of UPS, it is characterized in that comprising:

Three-phase transformer; Described three-phase transformer has multiple vice-side winding, and the output of every two described vice-side winding is respectively connected the input of arbitrary power cell respectively with triangle and star fashion;

3* (2N+1) individual power cell; Described 3* (2N+1) individual power cell is divided into three groups, and often organize each phase being made up of high voltage converter respectively 2N+1 power unit cascade, wherein N >=2, N represents the number of power cell; Each described power cell includes and obtains three phase rectifier output dc voltage for carrying out rectification to the three-phase electricity of input and carry out to arbitrary in three-phase electricity the first rectification circuit and the second rectification circuit that rectification obtains single-phase rectifier output dc voltage mutually; The output negative terminal of described 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 connecting the first rectification circuit and the second rectification circuit respectively, and the single-phase rectifier output dc voltage for exporting the first rectification circuit and the second rectification circuit carries out after voltage transformation the first charging circuit of the first super capacitor group and the charging of the second super capacitor group and the second charging circuit; Connect the output of the first charging circuit, for the first super capacitor group of energy storage; Connect the output of the second charging circuit, for the second super capacitor group of energy storage; Connect the first super capacitor group, the voltage for the first super capacitor group being exported carries out the DC/DC translation circuit boosted; Connect the second super capacitor group, the voltage for the second super capacitor group being exported carries out the 2nd DC/DC translation circuit 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 first, second DC/DC translation circuit described connects the phase contact of first, second rectification circuit described; 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 2nd DC/DC translation circuit connects the output negative terminal of the second rectification circuit by diode D14; For input voltage being carried out the SPWM three-level inverter circuit of DC-AC conversion, the output negative terminal of three phase rectifier output plus terminal and the second rectification circuit that this SPWM three-level inverter circuit connects the first rectification circuit is as both positive and negative polarity incoming end;

Be connected with optical fiber communication modules, for controlling a DSP of the first super capacitor group and the second super capacitor group discharge and recharge;

Be connected with optical fiber communication modules, for controlling the 2nd DSP of power cell, treatment system fault and Logic judgment;

Connect multiple power cell, a DSP and the 2nd DSP respectively, for multiple power cell and between a DSP, the 2nd DSP signal communication optical fiber communication modules;

Be connected with the 2nd DSP with a DSP, for the communication interface of frequency converter and external device communication;

And connect a DSP, the 2nd DSP and communication interface respectively, for showing the control panel of high voltage converter operating state and reception user operation in real time;

A described DSP and the 2nd DSP is interconnected, backups each other, and constitutes redundancy control system.

2. a kind of high voltage converter with UPS according to claim 1, is characterized in that described SPWM three-level inverter circuit comprises the dividing potential drop branch road be composed in series by electric capacity C1, electric capacity C2; By connecting according to emitter the three level arm path that power switch pipe Q1, Q2, Q3 that the mode of collector electrode is connected in series and Q4 and power switch pipe Q5, Q6, Q7 and Q8 of being connected in series by the mode being connected collector electrode according to emitter successively form 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 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 described communication interface comprises serial communication interface, modulator-demodulator.

5. a kind of high voltage converter with UPS according to claim 2, it is characterized in that one end of described electric capacity C1 connects one end of electric capacity C2, the other end of electric capacity C1 connects the three phase rectifier output plus terminal of the first rectification circuit, and the other end of described electric capacity C2 connects the output negative terminal of the second rectification circuit; The phase contact of described electric capacity C1, C2 connects the phase contact of described first rectification circuit, the second rectification circuit.

6. 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 emitter, reverse parallel connection has sustained diode 1, D2, D3, D4, D5, D6, D7 and D8 respectively.

7. 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 and the phase contact of described power switch pipe Q6, Q7 go between respectively as the output of power cell.

8. a kind of high voltage converter with UPS according to claim 5, is characterized in that described SPWM three-level inverter circuit also comprises clamping diode D9, D10 of series connection and clamping diode D11, D12 of series connection; The anode of described clamping diode D9 connects the negative electrode of clamping diode D10; The anode of described clamping diode D11 connects the negative electrode of clamping diode D12; The negative electrode of described clamping diode D9 connects the phase contact of power switch pipe Q1, Q2; The anode of described clamping diode D10 connects the phase contact of power switch pipe Q3, 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 is connected the phase contact of electric capacity C1, C2 with the phase contact of described clamping diode D11, D12.