CN206948199U - A kind of power supply of simulating grid disturbance - Google Patents

A kind of power supply of simulating grid disturbance Download PDF

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Publication number
CN206948199U
CN206948199U CN201720603452.8U CN201720603452U CN206948199U CN 206948199 U CN206948199 U CN 206948199U CN 201720603452 U CN201720603452 U CN 201720603452U CN 206948199 U CN206948199 U CN 206948199U
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monoblock type
type power
power cell
phase
circuit
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李胜男
吴水军
何廷
何廷一
彭俊臻
陈勇
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Electric Power Research Institute of Yunnan Power System Ltd
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Electric Power Research Institute of Yunnan Power System Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

Abstract

This application discloses a kind of power supply of simulating grid disturbance, including：35KV inputs breaker, 35KV outputs breaker, 35KV four quadrant convertors and 35KV bypass breakers；And 35KV four quadrant convertors include：Phase-shifting transformer and the three-phase cascade circuit being connected with phase-shifting transformer；Each phase of three-phase cascade circuit all includes 30 power conversion units；Each power conversion unit includes：Three phase controllable commutating bridge circuit, flat wave capacitor and H bridge type inverter circuit；35KV four quadrant convertors are used in the power supply provided due to the application, simplify LCL type wave filter of the prior art, and eliminate step-up transformer of the prior art, the adaptability of photovoltaic DC-to-AC converter and blower fan to power network is not only improved, also solves the problem of power network conversion efficiency caused by prior art uses LCL type wave filter and step-up transformer is low and utilization rate of electrical is not high.

Description

A kind of power supply of simulating grid disturbance
Technical field
The application is related to electrical equipment, more particularly to a kind of power supply of simulating grid disturbance.
Background technology
With the fast development of China's new energy, the installed capacity of photovoltaic generation and wind-power electricity generation is increasing, grid entry point Voltage class also more and more higher.China's photovoltaic generation and wind-power electricity generation are installed at present, and to be distributed mainly on China new in most places The western part such as boundary, Tibet, Inner Mongol or northern territory.These regional solar energy and wind energy resources enrich, but economics of underdevelopment, The stability and robustness of power network itself are inadequate, and the quality of power supply is bad so that have voltage dip, flickering, frequency fluctuation and The abnormal conditions such as low-order harmonic content is higher occur.When above-mentioned disturbance occurs in power network, photovoltaic DC-to-AC converter and blower fan can all trigger certainly The protection mechanism of body, so as to which off-grid stops generating electricity, the waste of resource and leaving unused for equipment are not only resulted in, can also increase maintenance Cost.
To solve the above problems, prior art uses LCL type wave filter and step-up transformer, to help to improve photovoltaic inversion The adaptability of device and blower fan to power network.
However, using LCL type wave filter and step-up transformer, conversion efficiency will certainly be caused relatively low, utilization rate of electrical is not High phenomenon.Also, current Large Copacity photovoltaic DC-to-AC converter and the voltage class of blower fan have much reached 35KV, capacity be all MW levels, larger energy loss can also be caused using LCL type wave filter and step-up transformer.
Utility model content
This application provides a kind of power supply of simulating grid disturbance, LCL type wave filter and liter are used to solve prior art The problem of power network conversion efficiency caused by pressure transformer is low and utilization rate of electrical is not high.
This application provides a kind of power supply of simulating grid disturbance, including：35KV inputs breaker, 35KV output open circuits Device, 35KV four quadrant convertors and 35KV bypass breakers；
One end of the 35KV inputs breaker connects the 35KV bypass breakers, and the 35KV inputs the another of breaker One end connects the input of the 35KV four quadrant convertors；
One end of the 35KV outputs breaker connects the output end of the 35KV four quadrant convertors, the 35KV outputs The other end of breaker connects the 35KV bypass breakers；
The 35KV four quadrant convertors include：Phase-shifting transformer and the three-phase cascade electricity being connected with the phase-shifting transformer Road；
Each phase of the three-phase cascade circuit all includes 30 power conversion units；
Each described power conversion unit includes：Three phase controllable commutating bridge circuit, flat wave capacitor and H bridge type inversion electricity Road；
The three phase controllable commutating bridge circuit, the flat wave capacitor and the H bridge type inverter circuit are in parallel；
First power conversion unit also includes：Filter inductance；One end of the filter inductance and the H bridge type are inverse Become the bridge arm connection of circuit, the other end is connected with voltage output port；
The bridge arm of the H bridge type inverter circuit in each described power conversion unit and next power conversion The bridge arm connection of the H bridge type inverter circuit in unit.
Optionally, the three phase controllable commutating bridge circuit includes：First monoblock type power cell, the second monoblock type power list Member, the 3rd monoblock type power cell, the 4th monoblock type power cell, the 5th monoblock type power cell and the 6th monoblock type power list Member；
The emitter stage of the first monoblock type power cell is connected with the colelctor electrode of the second monoblock type power cell；
The emitter stage of the 3rd monoblock type power cell is connected with the colelctor electrode of the 4th monoblock type power cell；
The emitter stage of the 5th monoblock type power cell is connected with the colelctor electrode of the 6th monoblock type power cell；
The circuit of the first monoblock type power cell and the second monoblock type power cell composition, the 3rd entirety The circuit and the 5th monoblock type power cell of formula power cell and the 4th monoblock type power cell composition and described the The circuit in parallel of six monoblock type power cells composition.
Optionally, the first monoblock type power cell, the second monoblock type power cell, the 3rd monoblock type work( Rate unit, the 4th monoblock type power cell, the 5th monoblock type power cell and the 6th monoblock type power cell It is the monoblock type power cell composed in parallel by two IGBT units respectively.
Optionally, the H bridge type inverter circuit includes：7th monoblock type power cell, the 8th monoblock type power cell, Nine monoblock type power cells and the tenth monoblock type power cell；
The emitter stage of the 7th monoblock type power cell is connected with the colelctor electrode of the 8th monoblock type power cell；
The emitter stage of the 9th monoblock type power cell is connected with the colelctor electrode of the tenth monoblock type power cell；
Circuit that the 7th monoblock type power cell forms with the 8th monoblock type power cell and described 9th whole The circuit in parallel of body formula power cell and the tenth monoblock type power cell composition.
Optionally, the 7th monoblock type power cell, the 8th monoblock type power cell, the 9th monoblock type work( Rate unit and the tenth monoblock type power cell are the monoblock type power cell composed in parallel by three IGBT units respectively.
Optionally, the 9th monoblock type power cell in each described H bridge type inverter circuit and described tenth whole The bridge arm midpoint of body formula power cell composition and the 7th monoblock type power cell in next H bridge type inverter circuit Connected with the bridge arm midpoint of the 8th monoblock type power cell composition.
Optionally, the power supply also includes：Main controller；The main controller is connected with the power conversion unit.
From above technical scheme, this application provides a kind of power supply of simulating grid disturbance, including：35KV inputs are disconnected Road device, 35KV outputs breaker, 35KV four quadrant convertors and 35KV bypass breakers；And 35KV four quadrant convertor bags Include：Phase-shifting transformer and the three-phase cascade circuit being connected with phase-shifting transformer；Each phase of three-phase cascade circuit all includes 30 Individual power conversion unit；Each power conversion unit includes：Three phase controllable commutating bridge circuit, flat wave capacitor and H bridge type inversion Circuit；35KV four quadrant convertors are used in the power supply provided due to the application, simplify LCL type wave filter of the prior art And step-up transformer of the prior art is eliminated, photovoltaic DC-to-AC converter and blower fan is not only improved to the adaptability of power network, also solves Prior art of having determined is not low high with utilization rate of electrical using power network conversion efficiency caused by LCL type wave filter and step-up transformer Problem.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the application, letter will be made to the required accompanying drawing used in embodiment below Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor, Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of the power supply for simulating grid disturbance that the embodiment of the present application provides；
Fig. 2 is the circuit diagram for the power conversion unit that the embodiment of the present application provides；
Fig. 3 is the circuit diagram for the 35KV four quadrant convertors that the embodiment of the present application provides；
Fig. 4 is that a phases power that the embodiment of the present application provides transmits vectogram；
Fig. 5 is the vector correlation figure in the two-phase rotating coordinate system that the embodiment of the present application provides.
Illustrate：
Wherein, 1-35KV inputs breaker；2-35KV exports breaker；3-35KV four quadrant convertors；4-35KV is bypassed Breaker；5- phase-shifting transformers；6- three phase controllable commutating bridge circuits；7- flat wave capacitors；8-H bridge inverter main circuits；9- filtered electricals Sense；10- the first monoblock type power cells；11- the second monoblock type power cells；The monoblock type power cells of 12- the 3rd；13- the 4th Monoblock type power cell；The monoblock type power cells of 14- the 5th；The monoblock type power cells of 15- the 6th；The monoblock type power of 16- the 7th Unit；The monoblock type power cells of 17- the 8th；The monoblock type power cells of 18- the 9th；The monoblock type power cells of 19- the tenth.
Embodiment
Referring to Fig. 1, a kind of structural representation of the power supply of simulating grid disturbance provided for the embodiment of the present application.Including： 35KV inputs breaker 1,35KV outputs breaker 2,35KV four quadrant convertors 3 and 35KV bypass breakers 4.
One end of the 35KV inputs breaker 1 connects the 35KV bypass breakers 4, and the 35KV inputs breaker 1 The other end connect the inputs of the 35KV four quadrant convertors 3.
One end of the 35KV outputs breaker 2 connects the output end of the 35KV four quadrant convertors 3, and the 35KV is defeated The other end for going out breaker 2 connects the 35KV bypass breakers 4.
35KV inputs breaker 1 as the power grid energy input switch in the embodiment of the present application；35KV output breakers 2 are used Power supply energy output in division the embodiment of the present application；35KV bypass breakers 4 are used for the power network of division the application access, when When photovoltaic DC-to-AC converter and blower fan carry out conventionally test, power grid energy is introduced directly into, when needing to carry out grid disturbance experiment, then Power grid energy is bypassed, then uses the electric energy of the output of 35KV four quadrant convertors 3, the energy consumption of equipment test can be reduced.
Referring to Fig. 3, the circuit diagram of the 35KV four quadrant convertors 3 provided for the embodiment of the present application.The 35KV four-quadrants Current transformer 3 includes：Phase-shifting transformer 5 and the three-phase cascade circuit being connected with the phase-shifting transformer 5.
Each phase of the three-phase cascade circuit all includes 30 power conversion units.
After 30 power conversion unit cascades, because cascade quantity is more, equivalent switching frequency is very high, at this moment exports Voltage waveform already close to sine wave, therefore, there is no need to use traditional LCL type wave filter, only with inductor filter.
Referring to Fig. 2, the circuit diagram of the power conversion unit provided for the embodiment of the present application.Each described power conversion list Member includes：Three phase controllable commutating bridge circuit 6, flat wave capacitor 7 and H bridge type inverter circuit 8.
The three phase controllable commutating bridge circuit 6, the flat wave capacitor 7 and the H bridge type inverter circuit 8 are in parallel.
First power conversion unit also includes：Filter inductance 9；One end of the filter inductance 9 and the H bridge type inversion The bridge arm connection of circuit 8, the other end are connected with voltage output port.
The bridge arm of the H bridge type inverter circuit 8 in each described power conversion unit becomes with next power The bridge arm connection of the H bridge type inverter circuit 8 changed in unit.
DC inverter after the rectifying conversion of three phase controllable commutating bridge circuit 6 can be exchange by H bridge type inverter circuit 8 Electricity.
From above technical scheme, a kind of power supply for simulating grid disturbance that the embodiment of the present application provides, including：35KV Input breaker 1,35KV outputs breaker 2,35KV four quadrant convertors 3 and 35KV bypass breakers 4；And 35KV four-quadrants Current transformer 3 includes：Phase-shifting transformer 5 and the three-phase cascade circuit being connected with phase-shifting transformer 5；Each phase of three-phase cascade circuit All include 30 power conversion units；Each power conversion unit includes：Three phase controllable commutating bridge circuit 6, flat wave capacitor 7 With H bridge type inverter circuit 8；35KV four quadrant convertors 3 are used in the power supply provided due to the application, are simplified in the prior art LCL type wave filter and eliminate step-up transformer of the prior art, not only improve photovoltaic DC-to-AC converter and blower fan to power network Adaptability, it is low and electric using power network conversion efficiency caused by LCL type wave filter and step-up transformer to also solve prior art The problem of energy utilization rate is not high.
Optionally, the three phase controllable commutating bridge circuit 6 includes：First monoblock type power cell 10, the second monoblock type work( Rate unit 11, the 3rd monoblock type power cell 12, the 4th monoblock type power cell 13, the 5th monoblock type power cell 14 and the 6th Monoblock type power cell 15；
The colelctor electrode of the emitter stage of the first monoblock type power cell 10 and the second monoblock type power cell 11 connects Connect；
The emitter stage of the 3rd monoblock type power cell 12 connects with the colelctor electrode of the 4th monoblock type power cell 13 Connect；
The emitter stage of the 5th monoblock type power cell 14 connects with the colelctor electrode of the 6th monoblock type power cell 15 Connect；
The circuit of the first monoblock type power cell 10 and the second monoblock type power cell 11 composition, the described 3rd Circuit and the fiveth monoblock type power cell of the monoblock type power cell 12 with the 4th monoblock type power cell 13 composition 14 circuit in parallel formed with the 6th monoblock type power cell 15.
Further, as shown in figure 3, the first monoblock type power cell 10 and the second monoblock type power cell 11 The circuit midpoint lead-out wire of composition is connected in a port of phase-shifting transformer 5；The 3rd monoblock type power cell 12 with The circuit midpoint lead-out wire of 4th monoblock type power cell 13 composition is connected in a port of phase-shifting transformer 5；Institute The circuit midpoint lead-out wire for stating the 5th monoblock type power cell 14 and the 6th monoblock type power cell 15 composition is connected to shifting In a port of phase transformer 5.Above-mentioned port is the secondary output of the Multiple coil of phase-shifting transformer 5.
Optionally, the first monoblock type power cell 10, the second monoblock type power cell 11, the 3rd entirety Formula power cell 12, the 4th monoblock type power cell 13, the 5th monoblock type power cell 14 and the 6th entirety Formula power cell 15 is the monoblock type power cell composed in parallel by two IGBT units respectively.
Optionally, the H bridge type inverter circuit 8 includes：7th monoblock type power cell 16, the 8th monoblock type power cell 17th, the 9th monoblock type power cell 18 and the tenth monoblock type power cell 19；
The emitter stage of the 7th monoblock type power cell 16 connects with the colelctor electrode of the 8th monoblock type power cell 17 Connect；
The emitter stage of the 9th monoblock type power cell 18 connects with the colelctor electrode of the tenth monoblock type power cell 19 Connect；
The circuit of the 7th monoblock type power cell 16 and the 8th monoblock type power cell 17 composition and described the The circuit in parallel of nine monoblock type power cells 18 and the tenth monoblock type power cell 19 composition.
Optionally, the 7th monoblock type power cell 16, the 8th monoblock type power cell 17, the 9th entirety Formula power cell 18 and the tenth monoblock type power cell 19 are the monoblock type work(composed in parallel by three IGBT units respectively Rate unit.
Optionally, the 9th monoblock type power cell 18 and the described tenth in each described H bridge type inverter circuit 8 The bridge arm midpoint that monoblock type power cell 19 forms and the 7th monoblock type work(in next H bridge type inverter circuit 8 The bridge arm midpoint that rate unit 16 forms with the 8th monoblock type power cell 17 connects.
Further, the He of the 9th monoblock type power cell 18 in H bridge type inverter circuit 8 in the 30th power conversion unit The bridge arm midpoint of tenth monoblock type power cell 19 composition is drawn out on neutral point.
Optionally, the power supply also includes：Main controller；The main controller is connected with the power conversion unit.Main controller It is middle to use TI2407 chips, real-time collecting unit voltage and input current, then by resolution of vectors technology, input current is shunted For watt current and reactive current, DC voltage closed loop output watt current instruction, referenced reactive current is arranged to 0, most laggard Row unity power factor control.
Further, by taking a phases of three-phase cascade circuit as an example：
Control system uses double-closed-loop control.Outer shroud controls DC bus-bar voltage, actual DC busbar voltage and given straight Input of the difference of busbar voltage as DC voltage pi regulator is flowed, it exports the d shaft currents ginseng as corresponding active power Value is examined, the active power of power network is sent to by adjusting current transformer, DC bus-bar voltage is operated in given reference voltage.Inner ring For current regulator, under the d-q coordinate systems rotated with line voltage vector synchronization, using two pi regulators to current transformer The d axis components and q axis components of output current carry out uneoupled control.
Wherein, with PWM converter (abbreviation PWM rectifier) to the switching device of H bridge type inverter circuit 8 Break-make is controlled.
The principle of above-mentioned decoupled active and reactive control is as follows：During energy feedback, a phase work(between PWM rectifier and power network Rate transmits vectogram as shown in figure 4, wherein,It is power network a phase voltage vectors,Be the both end voltage of filter inductance 9 fundamental wave into Point,It is the fundamental wave component of the output voltage of H bridge type inverter circuit 8,Be the output current of H bridge type inverter circuit 8 fundamental wave into Point, δ is line voltage Vector Rotation angular speed, and θ is line voltage and the angle of the output current of H bridge type inverter circuit 8.It can obtain To PWM rectifier be delivered to power network a phases active power and reactive power expression formula it is as follows：
From formula (1), after filter inductance 9 and line voltage E determinations, the active-power P for being transported to power network is adjusted And reactive power Q, can be by adjusting H bridge type inverter circuit 8 output voltage Uan1, Ubn1 and Ucn1 amplitude and phase come real It is existing.
Remember [ia,ib,ic]TFor the output current quantity of state of H bridge type inverter circuit 8, [Ua,Ub,Uc]TFor H bridge type inverter circuit 8 output voltage quantity of states, [ea,eb,ec]TFor power network phase voltage quantity of state, L is each phase filter inductance value, and is ignored in it Resistance.Then under static three-phase a-b-c coordinate systems, the state equation such as formula (2) of three-phase H bridge type inverter circuit 8：
Enter line translation control to power network current to be advantageous to pi regulator, by the shape based on static three phase coordinate systems a-b-c State equation (2) is transformed to the state equation under synchronous d-q coordinate systems, and the of ac of H bridge type inverter circuit 8 is transformed into direct current Amount, is designated as:
Formula (2) both ends multiply [C simultaneously1,C2]T, following expression formula can be obtained：
With ω, idAnd iqExpression (4) left side, it is three that can further obtain the such as expression formula of formula (5), the expression formula State equation of the phase H bridge type inverter circuit 8 under synchronous rotary d-q coordinate systems：
So under synchronous rotary d-q coordinate systems, the voltage and power expression of PWM rectifier output are：
When grid voltage three-phase symmetrical, and Park conversion is carried out, can obtain the conclusion of formula (8), wherein U is power network mutually electricity The peak value of pressure.
So formula (7) can be using abbreviation as following expression formula：
From formula (9), under the d-q coordinate systems rotated with line voltage vector synchronization, the d axis components of electric current are adjusted idActive-power P can be controlled, adjusts the q axis components i of electric currentqTo control reactive power Q, active power and reactive power are realized Uneoupled control.If it is 0 to set q axles reference current, the power factor of PWM rectifier output is just unit power factor.
Further, the embodiment of the present application is also using SPLL lock phase controls.Its principle is：It is electric in two-phase rotating coordinate system It is pressed into vectorWith its d, q shaft voltage componentRelation as shown in figure 5, for three phase network, voltage synthesis arrow AmountAmplitude be constant, then q shaft voltages componentReflect d shaft voltage componentsWith line voltage resultant vector's Phase relation.Especially, when q axis components areWhen, d axles andIn the same direction.In other words, can be by controlling power network Voltage q axis componentsMake line voltage resultant vectorD shaft voltage components are oriented to, realize both same-phases.
The instantaneous value of three-phase symmetrical phase voltage can be expressed as：
In formula (10), θ1=ω1T, it is power network A phase voltage phases, Um is grid voltage amplitude.
Three-phase symmetric voltage transforms to two-phase rest frame α, β shaft voltage component Usα、Usβ, the static alpha-beta coordinate system of two-phase The dq shaft voltage components U obtained again after two-phase rotating coordinate system convertssd、UsqIt can be expressed as：
In formula (11), θ is three-phase voltage SPLL output phase angle.
Further, the H bridge type inverter circuit 8 of power conversion unit is using output voltage and frequency uneoupled control, output Voltage-target is synthesized by reference voltage, fundamental frequency voltages difference, harmonic wave command voltage three, and frequency is independently arranged.Given benchmark After magnitude of voltage, after the actual deviation amount for independently detecting and calculating A, B, C three-phase voltage, then with reference voltage value it is superimposed to obtain A, B, C three-phase output voltage a reference value.If need to carry out harmonic compensation, then in the reality of calculating benchmark voltage and three-phase voltage While departure is superimposed, then the modulation voltage for needing to compensate times harmonic is superimposed to export three-phase voltage a reference value.
Further, to the output voltage closed-loop control of H bridge type inverter circuit 8, input voltage benchmark of the Voltage loop to synthesize It is worth and carries out PI conversion regulations for target instruction target word, output voltage instruction offset is added with output voltage benchmark is referred to as output voltage Order.
From above technical scheme, a kind of power supply for simulating grid disturbance that the embodiment of the present application provides, including：35KV Input breaker 1,35KV outputs breaker 2,35KV four quadrant convertors 3 and 35KV bypass breakers 4；And 35KV four-quadrants Current transformer 3 includes：Phase-shifting transformer 5 and the three-phase cascade circuit being connected with phase-shifting transformer 5；Each phase of three-phase cascade circuit All include 30 power conversion units；Each power conversion unit includes：Three phase controllable commutating bridge circuit 6, flat wave capacitor 7 With H bridge type inverter circuit 8；35KV four quadrant convertors 3 are used in the power supply provided due to the application, are simplified in the prior art LCL type wave filter and eliminate step-up transformer of the prior art, not only improve photovoltaic DC-to-AC converter and blower fan to power network Adaptability, it is low and electric using power network conversion efficiency caused by LCL type wave filter and step-up transformer to also solve prior art The problem of energy utilization rate is not high.
Those skilled in the art will readily occur to the application its after considering specification and putting into practice application disclosed herein Its embodiment.The application is intended to any modification, purposes or the adaptations of the application, these modifications, purposes or Person's adaptations follow the general principle of the application and including the undocumented common knowledges in the art of the application Or conventional techniques.Description and embodiments are considered only as exemplary, and the true scope of the application will by right above Ask and point out.
It should be appreciated that the precision architecture that the application is not limited to be described above and is shown in the drawings, and And various modifications and changes can be being carried out without departing from the scope.Scope of the present application is only limited by appended claim.

Claims (7)

  1. A kind of 1. power supply of simulating grid disturbance, it is characterised in that including：35KV input breakers (1), 35KV output breakers (2), 35KV four quadrant convertors (3) and 35KV bypass breakers (4)；
    One end of the 35KV input breakers (1) connects the 35KV bypass breakers (4), and the 35KV inputs breaker (1) the other end connects the input of the 35KV four quadrant convertors (3)；
    One end of the 35KV output breakers (2) connects the output end of the 35KV four quadrant convertors (3), and the 35KV is defeated The other end for going out breaker (2) connects the 35KV bypass breakers (4)；
    The 35KV four quadrant convertors (3) include：Phase-shifting transformer (5) and the three-phase being connected with the phase-shifting transformer (5) Cascade circuit；
    Each phase of the three-phase cascade circuit all includes 30 power conversion units；
    Each described power conversion unit includes：Three phase controllable commutating bridge circuit (6), flat wave capacitor (7) and H bridge type inversion electricity Road (8)；
    The three phase controllable commutating bridge circuit (6), the flat wave capacitor (7) and the H bridge type inverter circuit (8) are in parallel；
    First power conversion unit also includes：Filter inductance (9)；One end of the filter inductance (9) and the H bridge type The bridge arm connection of inverter circuit (8), the other end are connected with voltage output port；
    The bridge arm of the H bridge type inverter circuit (8) in each described power conversion unit and next power conversion The bridge arm connection of the H bridge type inverter circuit (8) in unit.
  2. 2. power supply according to claim 1, it is characterised in that the three phase controllable commutating bridge circuit (6) includes：First is whole Body formula power cell (10), the second monoblock type power cell (11), the 3rd monoblock type power cell (12), the 4th monoblock type power Unit (13), the 5th monoblock type power cell (14) and the 6th monoblock type power cell (15)；
    The emitter stage of the first monoblock type power cell (10) and the colelctor electrode of the second monoblock type power cell (11) connect Connect；
    The emitter stage of the 3rd monoblock type power cell (12) connects with the colelctor electrode of the 4th monoblock type power cell (13) Connect；
    The emitter stage of the 5th monoblock type power cell (14) connects with the colelctor electrode of the 6th monoblock type power cell (15) Connect；
    The circuit of the first monoblock type power cell (10) and the second monoblock type power cell (11) composition, the described 3rd Circuit and the fiveth monoblock type power of the monoblock type power cell (12) with the 4th monoblock type power cell (13) composition The circuit in parallel of unit (14) and the 6th monoblock type power cell (15) composition.
  3. 3. power supply according to claim 2, it is characterised in that the first monoblock type power cell (10), described second It is monoblock type power cell (11), the 3rd monoblock type power cell (12), the 4th monoblock type power cell (13), described 5th monoblock type power cell (14) and the 6th monoblock type power cell (15) are by two IGBT unit parallel connection groups respectively Into monoblock type power cell.
  4. 4. power supply according to claim 3, it is characterised in that the H bridge type inverter circuit (8) includes：7th monoblock type Power cell (16), the 8th monoblock type power cell (17), the 9th monoblock type power cell (18) and the tenth monoblock type power list First (19)；
    The emitter stage of the 7th monoblock type power cell (16) connects with the colelctor electrode of the 8th monoblock type power cell (17) Connect；
    The emitter stage of the 9th monoblock type power cell (18) connects with the colelctor electrode of the tenth monoblock type power cell (19) Connect；
    The circuit of the 7th monoblock type power cell (16) and the 8th monoblock type power cell (17) composition and described the The circuit in parallel of nine monoblock type power cells (18) and the tenth monoblock type power cell (19) composition.
  5. 5. power supply according to claim 4, it is characterised in that the 7th monoblock type power cell (16), the described 8th Monoblock type power cell (17), the 9th monoblock type power cell (18) and the tenth monoblock type power cell (19) are respectively It is the monoblock type power cell composed in parallel by three IGBT units.
  6. 6. power supply according to claim 5, it is characterised in that described in each described H bridge type inverter circuit (8) The bridge arm midpoint and next H bridges of nine monoblock type power cells (18) and the tenth monoblock type power cell (19) composition What the 7th monoblock type power cell (16) and the 8th monoblock type power cell (17) in formula inverter circuit (8) formed Bridge arm midpoint connects.
  7. 7. power supply according to claim 6, it is characterised in that the power supply also includes：Main controller；The main controller and institute State power conversion unit connection.
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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN106972759A (en) * 2017-05-26 2017-07-21 云南电网有限责任公司电力科学研究院 A kind of power supply of simulating grid disturbance

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106972759A (en) * 2017-05-26 2017-07-21 云南电网有限责任公司电力科学研究院 A kind of power supply of simulating grid disturbance

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