CN105490272A - H-bridge cascaded multi-level active power filter device - Google Patents
H-bridge cascaded multi-level active power filter device Download PDFInfo
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- CN105490272A CN105490272A CN201510270423.XA CN201510270423A CN105490272A CN 105490272 A CN105490272 A CN 105490272A CN 201510270423 A CN201510270423 A CN 201510270423A CN 105490272 A CN105490272 A CN 105490272A
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/20—Active power filtering [APF]
Abstract
The invention belongs to the field of a high-voltage large-power converter, in particular to an H-bridge cascaded multi-level active power filter device. The H-bridge cascaded multi-level active power filter device comprises a main loop, a filtering branch, a soft starting loop and a cascaded unit inversion module, wherein each cascaded H-bridge unit inversion module mainly comprises an insulated gate bipolar transistor (IGBT) module, a driving module, a unit control board, an absorption capacitor, an electrolytic capacitor and an equalizing resistor, the driving module is directly welded on the IGBT module, the unit control board is connected with the driving module through a flat cable and used for proving a pulse width modulation (PWM) pulse signal to an IGBT, the unit control board is connected with an upper computer through an optical fiber and used for receiving an H-bridge driving pulse instruction emitted from the upper computer, the absorption capacitor is connected in parallel to a DC side of each IGBT module, the electrolytic capacitor is connected in parallel to the DC sides of the IGBT module, and the equalizing resistor is connected in parallel to the electrolytic capacitor. In the H-bridge cascaded multi-level active power filter device, all H-bridge unit inversion modules have the same structure, and the H-bridge cascaded multi-level active power filter device is easily and modularly designed packaged.
Description
Technical field
The invention belongs to high-voltage high-power converter field, particularly relate to a kind of H bridge cascade multi-level active power filter device.
Background technology
Active filter has huge technical advantage compared with passive filtering, is widely used in countries such as many countries especially Japan, the U.S., Germany.Along with the raising of power electronic device manufacturing process and the proposition of new control strategy and topological structure, active filter technology will be more universal.High voltage large capcity is Active Power Filter-APF development trend from now on.In high pressure, high-power place, in order to solve the withstand voltage height of inverter switching device pipe, the contradiction that switching frequency is low, traditional method adds transformer before active power filter device, the high pressure of system become the electric pressure of conventional 380V.This kind of transformer is through particular design, and price is high, bulky, and transformer loss is higher.The present invention devises a kind of active power filter device of H bridge cascade multi-level, do not need the transformer through particular design, the direct linked network of device, solve high at the equipment loss that brings of high pressure place application transformer, device delay time long, cabinet volume large, the defect that equipment cost is higher; Simultaneously while guarantee switching frequency, reduce the voltage withstand class of switching tube.
Summary of the invention
The present invention be directed to active power filter device and be applied to high pressure, large-power occasions, adopt the topological structure of H bridge tandem type, this kind of topological structure can direct linked network, do not need the transformer of configure dedicated, have structure simple, be easy to modular advantage, be applied to high pressure, large-power occasions to solve active power filter in prior art, need configure dedicated transformer, the high and defect that installing space is large of equipment cost.
Technical scheme of the present invention is:
The invention provides a kind of H bridge cascade multi-level active power filter device,
A kind of H bridge cascade multi-level active power filter device, major loop comprises isolating switch (QS), main contactor (KM1), first fuse (FUa), second fuse (FUb), 3rd fuse (FUc), first lightning arrester (FV-A), second lightning arrester (FV-B), 3rd lightning arrester (FV-C), first network reactor (L1), second network reactor (L2), 3rd network reactor (L3), first bridge reactor (L4), second bridge reactor (L5), 3rd bridge reactor (L6), first voltage Hall (HVT1), second voltage Hall (HVT2), tertiary voltage Hall (HVT3), first current Hall (HAT1), second current Hall (HAT2), 3rd current Hall (HAT3), filter branch, softly open loop and tandem type unit inversion module,
Described 3 fuse first fuses (FUa), the second fuse (FUb), the 3rd fuse (FUc) are connected in series after main contactor (KM1), do the overcurrent protection of whole device; Described 3 lightning arrester first lightning arresters (FV-A), the second lightning arrester (FV-B), the 3rd lightning arrester (FV-C) make the lightning protection of whole device after being connected in parallel on 3 fuse first fuses (FUa), the second fuse (FUb), the 3rd fuse (FUc); Described 3 nets side reactance first network reactor (L1), the second network reactor (L2), the 3rd network reactor (L3), 3 bridge side reactance first bridges reactor (L4), the second bridge reactor (L5), the 3rd bridge reactor (L6), after being connected in series in 3 fuse first fuses (FUa), the second fuse (FUb), the 3rd fuse (FUc); Described voltage Hall first voltage Hall (HVT1), the second voltage Hall (HVT2), tertiary voltage Hall (HVT3) are connected in parallel on the former avris of isolating transformer, sample as system voltage; After described current Hall first current Hall (HAT1), the second current Hall (HAT2), the 3rd current Hall (HAT3) are connected in series in the reactance of bridge side, as bridge side current sample;
It is characterized in that:
Described major loop isolating switch (QS) is directly connected with net side high-pressure system, is used as major loop isolated high-voltage;
Described soft loop of opening is connected in parallel on main contactor (KM1) both sides, comprise main contactor (KM1), 2 isolating transformer first isolating transformers (T1), the second isolating transformer (T2), 3 soft opens that fuse first softly opens fuse (FU1), the second soft fuse (FU2), the 3rd that opens softly opens fuse (FU3), 3 soft open resistance first soft open resistance (R1), second soft open resistance (R2), the 3rd soft open resistance (R3) and 1 softly open contactor (KM2); Wherein, main contactor (KM1) is connected in series after isolating switch QS; The former limit of the first isolating transformer (T1), the second isolating transformer (T2) is connected in main contactor (KM1) both sides in parallel, described first softly opens fuse (FU1), the second soft fuse (FU2), the 3rd that opens softly opens fuse (FU3), softly open contactor (KM2), first softly opens that resistance (R1), second softly opens resistance (R2), the 3rd soft resistance (R3) that opens is sequentially connected in series secondary at 2 isolating transformer first isolating transformers (T1), the second isolating transformer (T2);
Described filter branch is connected in parallel between net side reactance (L1), (L2), (L3) and bridge side reactance (L4), (L5), (L6);
Described filtering contactor (KM3) is connected in series in filter branch side, as on-off filter branch;
Described tandem type unit inversion module is made up of 6 H-bridge unit inversion modules, carries out the series connection of 2 H-bridge unit inversion modules, the form of alternate star-like connection is connected on major loop side.
Further, the H-bridge unit inversion module of described cascade forms primarily of IGBT module, driver module, unit controls plate, Absorption Capacitance, electrochemical capacitor and grading resistor;
Described driver module is directly welded in IGBT module; Unit controls plate is connected by winding displacement with driver module, provides pwm pulse signal to IGBT; Unit controls plate is connected with host computer by optical fiber, accepts the H bridge driving pulse instruction that host computer sends;
Described Absorption Capacitance is connected in each IGBT module DC side in parallel; Described electrochemical capacitor is connected in the DC side of IGBT module in parallel; Described grading resistor and electrochemical capacitor are connected in parallel.
The invention has the beneficial effects as follows: H bridge cascade multi-level Active Power Filter-APF of the present invention has following beneficial effect:
(1) the present invention can be applied to 660V ~ 1260V high-pressure system, does not need the transformer of particular design to carry out step-down, the direct linked network of device.Device response fast (reactive power compensation response time≤7ms, harmonic compensation response time≤16ms), volume is little, cost is low.
(2) adopt the topological structure of H bridge cascade multi-level, the structure of each H-bridge unit inversion module is identical, easily carries out modularized design and encapsulation; What unit switch device bore resistance toly forces down, and switching device used is few.
(3) each H-bridge unit inversion module of this device is with independently DC power supply, does not have direct electrical communication each other, there is not DC side voltage-sharing.
Accompanying drawing explanation
Fig. 1 is the topological diagram of H-bridge unit inversion module of the present invention.
Fig. 2 is H bridge cascade multi-level active filter major loop figure of the present invention.
Wherein, 1-IGBT module, 2-driver module, 3-unit controls plate, 4-Absorption Capacitance, 5-electrochemical capacitor, 6-grading resistor; 7-filter branch, 8-H bridge unit inversion module, 9-tandem type unit inversion module, 10-is soft opens loop.
Embodiment
Characteristics of principle of the present invention is further illustrated below in conjunction with accompanying drawing.
H bridge tandem type electric power Active Power Filter-APF of the present invention is applied to offshore drilling platforms, and system voltage is 1140V ~ 1260V, this device output current >=60A.
The isolating switch that active power filter device major loop of the present invention uses is exclusively used in offshore platform.Isolating switch and vacuum contactor are with the use of the control system of constituent apparatus major loop.Wherein isolating switch is with special switch knob, this isolating switch can effectively and electric power system carry out electrical isolation, to ensure when overhaul of the equipments, the safety of staff and equipment.
1 vacuum contactor KM1,2 isolating transformers T1, T2,3 soft opens fuse FU1, FU2, FU3, and 1 soft opens contactor KM2 and 3 soft resistance R1, R2, R3 of opening and constitute the soft of device and open loop.
No-load voltage ratio, the capacity of 2 isolating transformers T1, T2 are completely the same, fuse, contactor, softly open the secondary side that resistant series is connected to 2 isolating transformers.Closed isolating switch, the soft contactor that opens closes, and by loop isolating transformer T1, softly opens fuse FU1 ~ 3, softly opens contactor KM2, softly opens resistance R1 ~ 3, isolating transformer T2, carries out precharge to the DC side of the H-bridge unit inversion module of cascade.Master controller judges DC voltage value, charges complete, closed main contactor KM1, disconnects softly opening contactor KM2, achieves the soft start of device.Meanwhile, isolating transformer T1 secondary side is by an a miniature circuit breaker QF1 and filter LV for device provides control power supply, and the normal battle of contactor KM2 and the heat radiation centrifugal blower of insurance connection device are passed through in the secondary side of isolating transformer T2.
This kind of soft loop of opening adopts isolating transformer, and its primary side and secondary side are electrically completely isolated, have carried out good filtration on high-tension side power supply, suppress high frequency spurs to import control loop into.The soft loop device used that opens is low pressure 380V device, and cost is low, device is little, saves cabinet space.
Circuit breaker Q F1 protects as the higher level controlling power supply, control switch, for the control power-supply system of device provides overload, short-circuit protection.Control power-supply system inlet wire side at device simultaneously and load filter, the harmonic wave in filtering appts, provides pure direct current to the control power-supply system of device.
The fuse that this device adopts is highly sensitive fast acting fuse, and fast acting fuse has the advantage that speed is fast, efficiency is high.This fast acting fuse can provide better overload protection and more reliable short-circuit protection for this device.
Being used for the reactance of bridge side L4, L5, L6 of the high frequency ripple current produced during net side reactance L1, L2, L3 of filtering Electric Network Higher Harmonic and filtering PWM converter are run all adopts soft magnetism reactor.Soft magnetism reactor is compared to traditional reactor and has the advantage that loss is little, temperature rise is low, noise is little, volume is little.
The parallel connection in the side reactance of major loop net and the reactance of bridge side of this device adds LCL filter branch, is controlled the break-make of filter branch by the normally opened contact of contactor KM3.LCL filter branch is used for the high order harmonic component of filtering inversion unit breaker in middle pipe, prevents the high order harmonic component of switching tube from injecting electrical network.LCL filter branch, net side reactance and the reactance of bridge side constitute the filtering system of device jointly
The H-bridge unit inversion module of this device cascade is mainly made up of IGBT module, Absorption Capacitance, electrochemical capacitor, grading resistor, as shown in Figure 1.Module adopts the driver module of powerful IGBT, IGBT to be directly welded in IGBT module.The unit controls plate of H-bridge unit inversion module inside is connected by winding displacement with driver module, provides pwm pulse signal to IGBT.Unit controls plate is connected with host computer by optical fiber, accepts the H bridge driving pulse instruction that host computer sends.
The Absorption Capacitance of unit inversion module inside, for the protection of IGBT, eliminates the peak voltage that the stray inductance due to busbar causes.Electrochemical capacitor plays the effect of DC support.Grading resistor solves the difference due to capacitance and insulation resistance brought due to capacitances in series and the uneven problem of voltage caused.
The power cabinet of this device carries out every two H-bridge unit inversion module series connection mutually, the structure that alternate star connects.Each H-bridge unit inversion module, with independently DC power supply, does not have direct electrical communication each other, there is not voltage-sharing.Through PWM can export+Ud, 0 ,-Ud three level.In this device, every 2 H bridge series connection mutually, often can export 2N+1=5 level mutually.
Apply this kind of cascade structure and have that loss is little, cost is low, transformerless ferromagnetic nonlinear problem and floor space is little.Main circuit structure simply, not needs clamps, and Controller gain variations is simple, when exporting the voltage of same level number, and required switching device minimum number.
Claims (2)
1. a H bridge cascade multi-level active power filter device, major loop comprises isolating switch (QS), main contactor (KM1), first fuse (FUa), second fuse (FUb), 3rd fuse (FUc), first lightning arrester (FV-A), second lightning arrester (FV-B), 3rd lightning arrester (FV-C), first network reactor (L1), second network reactor (L2), 3rd network reactor (L3), first bridge reactor (L4), second bridge reactor (L5), 3rd bridge reactor (L6), first voltage Hall (HVT1), second voltage Hall (HVT2), tertiary voltage Hall (HVT3), first current Hall (HAT1), second current Hall (HAT2), 3rd current Hall (HAT3), filter branch, softly open loop and tandem type unit inversion module,
Described 3 fuse first fuses (FUa), the second fuse (FUb), the 3rd fuse (FUc) are connected in series after main contactor (KM1), do the overcurrent protection of whole device; Described 3 lightning arrester first lightning arresters (FV-A), the second lightning arrester (FV-B), the 3rd lightning arrester (FV-C) make the lightning protection of whole device after being connected in parallel on 3 fuse first fuses (FUa), the second fuse (FUb), the 3rd fuse (FUc); Described 3 nets side reactance first network reactor (L1), the second network reactor (L2), the 3rd network reactor (L3), 3 bridge side reactance first bridges reactor (L4), the second bridge reactor (L5), the 3rd bridge reactor (L6), after being connected in series in 3 fuse first fuses (FUa), the second fuse (FUb), the 3rd fuse (FUc); Described voltage Hall first voltage Hall (HVT1), the second voltage Hall (HVT2), tertiary voltage Hall (HVT3) are connected in parallel on the former avris of isolating transformer, sample as system voltage; After described current Hall first current Hall (HAT1), the second current Hall (HAT2), the 3rd current Hall (HAT3) are connected in series in the reactance of bridge side, as bridge side current sample;
It is characterized in that:
Described major loop isolating switch (QS) is directly connected with net side high-pressure system, is used as major loop isolated high-voltage;
Described soft loop of opening is connected in parallel on main contactor (KM1) both sides, comprise main contactor (KM1), 2 isolating transformer first isolating transformers (T1), the second isolating transformer (T2), 3 soft opens that fuse first softly opens fuse (FU1), the second soft fuse (FU2), the 3rd that opens softly opens fuse (FU3), 3 soft open resistance first soft open resistance (R1), second soft open resistance (R2), the 3rd soft open resistance (R3) and 1 softly open contactor (KM2); Wherein, main contactor (KM1) is connected in series after isolating switch QS; The former limit of the first isolating transformer (T1), the second isolating transformer (T2) is connected in main contactor (KM1) both sides in parallel, described first softly opens fuse (FU1), the second soft fuse (FU2), the 3rd that opens softly opens fuse (FU3), softly open contactor (KM2), first softly opens that resistance (R1), second softly opens resistance (R2), the 3rd soft resistance (R3) that opens is sequentially connected in series secondary at 2 isolating transformer first isolating transformers (T1), the second isolating transformer (T2);
Described filter branch is connected in parallel between net side reactance (L1), (L2), (L3) and bridge side reactance (L4), (L5), (L6);
Described filtering contactor (KM3) is connected in series in filter branch side, as on-off filter branch;
Described tandem type unit inversion module is made up of 6 H-bridge unit inversion modules, carries out the series connection of 2 H-bridge unit inversion modules, the form of alternate star-like connection is connected on major loop side.
2. a kind of H bridge cascade multi-level active power filter device according to claim 1, is characterized in that:
The H-bridge unit inversion module of described cascade forms primarily of IGBT module, driver module, unit controls plate, Absorption Capacitance, electrochemical capacitor and grading resistor;
Described driver module is directly welded in IGBT module; Unit controls plate is connected by winding displacement with driver module, provides pwm pulse signal to IGBT; Unit controls plate is connected with host computer by optical fiber, accepts the H bridge driving pulse instruction that host computer sends;
Described Absorption Capacitance is connected in each IGBT module DC side in parallel; Described electrochemical capacitor is connected in the DC side of IGBT module in parallel; Described grading resistor and electrochemical capacitor are connected in parallel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110571824A (en) * | 2019-08-30 | 2019-12-13 | 北京星航机电装备有限公司 | iron core magnetization experimental equipment and direct voltage adjustable SVG control method thereof |
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| CN110571824A (en) * | 2019-08-30 | 2019-12-13 | 北京星航机电装备有限公司 | iron core magnetization experimental equipment and direct voltage adjustable SVG control method thereof |
| CN110571824B (en) * | 2019-08-30 | 2020-11-06 | 北京星航机电装备有限公司 | Iron core magnetization experimental equipment and direct voltage adjustable SVG control method thereof |
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Effective date of registration: 20201013 Address after: 065001 No. 68 Lotus Road, Langfang Development Zone, Hebei, China Patentee after: LANGFANG IN-POWER ELECTRIC Co.,Ltd. Patentee after: BEIJING IN-POWER ELECTRIC Co.,Ltd. Address before: 065001 No. 68 Lotus Road, Langfang Development Zone, Hebei, China Patentee before: LANGFANG IN-POWER ELECTRIC Co.,Ltd. Patentee before: BEIJING IN-POWER ELECTRIC Co.,Ltd. Patentee before: BEIJING IN-POWER NEW ENERGY Co.,Ltd. |
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