CN206389301U

CN206389301U - A kind of fast control power-supply system

Info

Publication number: CN206389301U
Application number: CN201621366148.8U
Authority: CN
Inventors: 翁华明
Original assignee: Suzhou Rich Industrial Equipment Co Ltd
Current assignee: Suzhou Rich Industrial Equipment Co Ltd
Priority date: 2016-12-13
Filing date: 2016-12-13
Publication date: 2017-08-08
Anticipated expiration: 2026-12-13

Abstract

The utility model belongs to pulse power technical field, specifically related to a kind of fast control power-supply system, it is made up of a charging module unit, a H bridge cascade connection multi-level topological structures and a breaker, the input connection alternating current input power supplying of charging module unit, output s ends are respectively connecting to each H-bridge unit in H bridge cascade connection multi-level topological structures, and the output end of H bridge cascade connection multi-level topological structures connects load circuit through breaker.The utility model controls power-supply system soon has practical, H-bridge unit circuit and simple in construction, easy to maintenance, the features such as DC voltage utilization rate is high, without configuring independent charging circuit, the volume and cost relative reduction of whole device on each H bridges submodule.

Description

A kind of fast control power-supply system

Technical field

The utility model belongs to pulse power technical field, and in particular to power-supply system is controlled in many capacitor energy storage type connection in series-parallel soon And control method.

Background technology

Superconducting tokamak（EAST）Quick control power supply（Referred to as fast control power supply）It is a kind of tool There is the bulk voltage source type inverter of current source characteristic, it is the plasma drift production of control output current real-time tracking that it, which is acted on, Raw displacement signal, the exciting current of thousands of or tens of kiloamperes is provided for the fast control coil of internal vacuum chamber, formed magnetic field with Maintain dynamic equilibrium and accurate location of the plasma in on-circular cross-section, with suppress plasma it is big it is elongated under it is quick Drift.Fast control power supply is actually a kind of Single-Phase Inverter Source, but from the output current of power supply unlike conventional inverter Waveform is not sine wave, and its amplitude and frequency all have very strong randomness, and its electric current must hang down according to plasma current The displacement that Nogata is upwardly deviated from equilbrium position quickly changes, and plasma is in the position of relative equilibrium.While the power supply Load current demand ripple it is as far as possible small, for this using phase-shift PWM multiple technology to reach system necessary requirement.Usually require that Fast control power supply for EAST devices can export the load current of thousands of or tens of kiloamperes, and when requiring the response of electric current Between no more than 1ms or faster, and separate unit current transformer is difficult to realize so big and quick current-responsive, is become for this using multigroup Flow the series-parallel mode of device unit.Certain fast control coil output current wave requirement is as shown in Figure 1.The power supply is as can be seen from Figure High-current output pulse in short-term, the usual high current duration is no more than 1s.Astable output electrical current is several ten points of peak point current One of.

The fast control power supply run at present is to change a social system to form on the basis of mesohigh multi-level frequency conversion device.The power supply is by multigroup Mutually isostructural current transformer is formed in parallel, and separate unit current transformer theory diagram is as shown in Fig. 2 H bridge modules used in the current transformer Cellular construction figure is as shown in Figure 3.It can be seen that the current transformer mainly uses cascaded H-bridges topological structure from Fig. 2, Fig. 3, due to input For alternating voltage, therefore increase three-phase isolation transformer and three-phase diode rectifier bridge, Huo Zheqian in each H bridge modules unit front end The end modes such as the transformer of one or many multi output winding.

The shortcoming of prior art：Although control power-supply system can meet wanting for EAST devices experiment using structure shown in Fig. 2 soon Ask, but there is also following shortcoming：

1. each H bridge modules input side is powered by isolating transformer.Because fast control power supply belongs to short-term operation power supply, There is the time of abundance to can be used to charge to each module.Excessive isolating transformer not only increases equipment cost, also increases Installing space needed for equipment.

2. there is three-phase diode rectification module in each H bridge modules.Excessive rectifying component to control power supply system soon The possibility for occurring failing of uniting is improved, and cost also accordingly increases.

3. because momentary pulse electric current is very big, generally require to match somebody with somebody more energy storage DC capacitor in each H bridge modules, therefore Special preliminary filling electrical circuit must be configured, this also increases the volume of system and cost.

4. during high current is to load discharge, if the DC voltage on electric capacity declines quickly, input can be caused Side electric current is very big, and larger impact is caused to input power network.

Utility model content

In order to solve these shortcomings that above-mentioned conventional fast control power supply is present, the utility model provides a kind of single charge circuit Fast control power supply, its installing space and equipment cost are minimized.

The utility model is specifically adopted the following technical scheme that：

A kind of fast control power-supply system, by a charging module unit, a H bridge cascade connection multi-level topological structures and a breaker group Into the input connection alternating current input power supplying of charging module unit, output end is respectively connecting to H bridge cascade connection multi-level topological structures In each H-bridge unit, the output ends of H bridge cascade connection multi-level topological structures connects load circuit through breaker.

The technical scheme that the utility model is further limited is：

Foregoing fast control power-supply system, wherein H bridges cascading topological structure is composed in parallel by least two bridge arm unit, each Bridge arm unit is composed in series by least one H-bridge unit.

Foregoing fast control power-supply system, wherein charging module unit are made up of rectifier and the connection of DC/DC units.

Foregoing fast control power-supply system, wherein rectifier are three-phase diode rectifier or IGBT bridge rectifiers.

Foregoing fast control power-supply system, wherein rectifier are IGBT copped waves unit or two-way DC/DC units.

The utility model advantage：

(1) the utility model device is only with single charhing unit, by appropriate control strategy, using appropriate point When charge control mode, you can complete to the charging process of H-bridge unit DC side storage capacitor all on convertor equipment, topology Simple and reliable for structure, equipment operation and maintenance more facilitate, while having saved equipment cost and installation dimension.(2) employ same Charhing unit is covered, the breaker of rear end is disconnected, you can the pre-charge process of whole unit module energy storage DC capacitors, preliminary filling is completed Efficiency high in electric process, charhing unit utilization rate is high, reduces cost.

Brief description of the drawings

Fig. 1 is fast control electric power outputting current oscillogram.

Fig. 2 is conventional fast control current transformer for power supply topology diagram.

Fig. 3 is the H-bridge unit module with rectification module and storage capacitor.

Fig. 4 is that the utility model controls the converter topologies figure that power supply is used soon.

Fig. 5 is H bridge inverter unit structure chart.

Fig. 6 is charhing unit U1 structure charts.

Fig. 7 is the charhing unit U1 structure charts with energy feedback function.

Fig. 8 is that charhing unit gives H bridge module unit charging structure figures.

Fig. 9 a are that charhing unit gives single H-bridge unit charging schematic diagram.

Fig. 9 b are that charhing unit and same polarity export H-bridge unit and give H-bridge unit charging schematic diagram.

Fig. 9 c are that charhing unit and reversed polarity export H-bridge unit and give H-bridge unit charging schematic diagram.

Fig. 9 d are charhing units to multiple H-bridge unit serial connection charge schematic diagrames.

Embodiment

The utility model is further detailed with reference to specific embodiment.

The utility model controls converter topologies in power-supply system soon as shown in figure 4, the current transformer as can be seen from Figure Using H bridge cascade connection multi-level topological structures, each bridge arm unit is by m（m≥1）Individual H-bridge unit is in series.In order to improve equipment Output current grade, the utility model device uses n（n≥2）Individual single bridge arm unit mode in parallel.The utility model power supply A certain moment in structure in running order H-bridge unit number can be adjusted according to apparatus of load demand.From Fig. 4 also It can be seen that the output of current transformer constitutes loop through circuit breaker Q F and coil load, coil load is mainly based on inductance, the R in figure For circuit and the equivalent resistance of coil.

H-bridge unit structure used in the utility model current transformer is as shown in figure 5, the storage capacitor in the structure is great Rong It is worth electric capacity.From unlike common structure, the utility model converter structure is only with single charging module unit U1, the unit Structure have two kinds, respectively as shown in Figure 6, Figure 7.As can be seen from Figure 6, the charhing unit is by three-phase diode rectifier and IGBT Copped wave unit is constituted, and three-phase alternating voltage is changed into DC voltage by three-phase diode rectifier, and copped wave unit primarily serves tune Save the effect of output voltage and output current.Charhing unit shown in Fig. 7 is by three-phase IGBT bridge rectifiers and two-way DC/DC units Composition.Due to using bilateral device, therefore the two-way flow of energy can be realized.Structure shown in Fig. 7 is removed and can completed shown in Fig. 6 Outside the function of structure charhing unit, can also feedback energy into power network.LC loops in Fig. 6, Fig. 7 charging module unit are filtering Circuit.H-bridge unit and connected mode figure such as Fig. 8 institutes of the charging module unit with energy feedback function shown in Fig. 7 in Fig. 4 Show, connected mode is similar shown in Fig. 6.

Because fast control power supply belongs to the power supply of big pulse current in short-term and long-time low current working method, thus using point When the mode that charges charged to the DC side storage capacitor of the H-bridge unit in converter cell.Put to load high current/voltage When electric, stop charging, all H-bridge units are adjusted to load discharge, and by the control to switching device in H-bridge unit simultaneously For the quantity of the storage capacitor of electric discharge, the output voltage values of regulation power supply；Discharged in low current/tension discharge or stopping During gap, the charging and discharging process of the storage capacitor in all H-bridge units is completed.To each H bridges list in whole power-supply system When member enters line precharge, breaker QF in Fig. 4 need to be disconnected.Charging only can charge to a H-bridge unit every time, under which The DC voltage of each H-bridge unit can be charged under charging module unit U1 output voltage values, which and need not fill The module bypass of electricity falls（Switching tube S1, S2 in H-bridge unit are simultaneously turned on or switching tube S3, S4 are simultaneously turned on, and this fills Electrically schematic diagram is as illustrated in fig. 9）；It can also be charged every time to multiple H-bridge units, each H-bridge unit DC side under which Voltage is changeable, can be electrically charged the output voltage polarity of H-bridge unit to adjust by control, various chargings in this condition Schematic diagram is as shown in Fig. 9 b, 9c, 9d（Because number of modules is numerous, it is only with two H-bridge units in figure for the purpose of simplifying the description Example）.It can be seen that from Fig. 9 a-9d, need to only change the regulation that each H-bridge unit DC voltage can be achieved in control strategy, and each H Bridge unit DC voltage value is specific relevant with current value size needed for current time.

In addition to the implementation, the utility model can also have other embodiment.All use equivalent substitutions or equivalent change The technical scheme to be formed is changed, the protection domain of the utility model requirement is all fallen within.

Claims

1. a kind of fast control power-supply system, it is characterised in that by a charging module unit（U1）, a H bridge cascade connection multi-level topological structures With a breaker（QF）Composition, the charging module unit（U1）Input connection alternating current input power supplying, output end connects respectively It is connected to each H-bridge unit in H bridge cascade connection multi-level topological structures, the output end of the H bridges cascade connection multi-level topological structure Through breaker（QF）Connect load circuit.

2. fast control power-supply system as claimed in claim 1, it is characterised in that the H bridges cascading topological structure is by least two bridge Arm unit is composed in parallel, and each bridge arm unit is composed in series by least one H-bridge unit.

3. fast control power-supply system as claimed in claim 1, it is characterised in that the charging module unit is by rectifier and DC/DC Unit connection composition.

4. control power-supply system as claimed in claim 3 fast, it is characterised in that the rectifier be three-phase diode rectifier or IGBT bridge rectifiers.

5. fast control power-supply system as claimed in claim 3, it is characterised in that the rectifier is IGBT copped waves unit or two-way DC/DC units.