CN203466568U - Energy-saving intelligent filtering compensation measurement comprehensive protection wave optimization cabinet - Google Patents

Energy-saving intelligent filtering compensation measurement comprehensive protection wave optimization cabinet Download PDF

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Publication number
CN203466568U
CN203466568U CN201320584386.6U CN201320584386U CN203466568U CN 203466568 U CN203466568 U CN 203466568U CN 201320584386 U CN201320584386 U CN 201320584386U CN 203466568 U CN203466568 U CN 203466568U
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CN
China
Prior art keywords
active power
power filter
energy
cabinet
transformer
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Expired - Fee Related
Application number
CN201320584386.6U
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Chinese (zh)
Inventor
李文奇
吴智林
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ANHUI HUAZHENG ELECTRIC Co Ltd
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ANHUI HUAZHENG ELECTRIC Co Ltd
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Priority to CN201320584386.6U priority Critical patent/CN203466568U/en
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Publication of CN203466568U publication Critical patent/CN203466568U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/20Active power filtering [APF]

Abstract

The utility model relates to the technical field of power accessory products and specifically relates to an energy-saving intelligent filtering compensation measurement comprehensive protection wave optimization cabinet. The cabinet comprises a cabinet body which is internally provided with an active power filter, a connection reactor, an active power filterer switch, an isolating switch, a current transformer, a line outlet circuit breaker. The active power filter is connected with the active power filterer switch through the reactor. The active power filterer switch is connected with the isolating switch and a power grid. According to the energy-saving intelligent filtering compensation measurement comprehensive protection wave optimization cabinet, the harmonic current on a bus is eliminated in real time, the operation efficiency of a transformer is raised, the operation safety of the transformer and electric equipment is ensured, transformer operation abnormality, system resonance, and compensation capacitor overcurrent caused by harmonic current are avoided, the service life of the equipment is raised, and a previous frequent capacitor cabinet failure phenomenon is avoided. The cabinet transformer structure has the advantages of modularization, small size, beautiful appearance, safe and reliable operation, convenient maintenance and the like technically.

Description

The excellent ripple case of a kind of energy-conserving intelligent filtering compensation metering integrated protection
Technical field
The present invention relates to electric power auxiliary products technical field, be specifically related to the excellent ripple case of a kind of energy-conserving intelligent filtering compensation metering integrated protection.
Background technology
Along with deepening continuously of upgrade of rural power grids, a large amount of distribution transformer integrated power distribution cabinets or JP cabinet are arranged on the distribution transformer secondary side in city net, rural power grids.Outdoor electricity distribution and compensation equipment that distribution transformer integrated power distribution cabinet mainly consists of isolating switch, circuit breaker, capacitor, switching device, compensating controller etc., adopt multiple scheme of electric power flexibly.Cabinet is divided into independently compartment of four of inlet wires, outlet, electric capacity, metering, user according to scene need to select side enterprising, under the lead-in wire mode such as enter.The operation maintenance of rural power grids, safety management have been played to positive effect.But traditional compensator exists the shortcoming that response speed is slow, compensation effect can not accurately be controlled, easily cause self breaking-up with electrical network generation parallel resonance and switching concussion.
Active Power Filter-APF (APF:Active Power Filter), APF accesses electrical network in parallel, by harmonic wave and the idle component of real-time detection load, adopt PWM converter technique, electric current with harmonic wave and idle component equal and opposite in direction, opposite direction is injected to power supply-distribution system, realize and suppress harmonic wave, function that dynamic compensation is idle.APF is the preferred plan in current filtering harmonic wave, reactive power compensation field, up-to-date sci-tech product.But, existing Active Power Filter-APF due to components and parts volume and integrated level not high, often take larger space, be not suitable for the requirement that adapts to the standardization of countryside low-voltage electric distribution device, miniaturization, outdoor type.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of energy-conserving intelligent filtering compensation metering integrated protection excellent ripple case; overcome traditional compensator and have that response speed is slow, compensation effect can not accurately be controlled, easily cause the shortcoming of self breaking-up with electrical network generation parallel resonance and switching concussion.
Technical problem to be solved by this invention realizes by the following technical solutions:
The excellent ripple case of a kind of energy-conserving intelligent filtering compensation metering integrated protection; comprise casing; in described casing, be provided with Active Power Filter-APF, linked reactor, Active Power Filter, isolating switch, current transformer, wire-outgoing breaker; it is characterized in that: described Active Power Filter-APF is connected with Active Power Filter by reactor, described Active Power Filter is connected and electrical network with isolating switch.
Described Active Power Filter-APF is encapsulated in Active Power Filter-APF module.
In Active Power Filter-APF module, metering units is housed.
Active Power Filter comprises circuit breaker, fuse and controlled power electronic device.
The excellent ripple case of energy-conserving intelligent filtering compensation metering integrated protection is arranged on the distribution transformer secondary side in city net, rural power grids.
Isolating switch upper end is directly connected with Circuit Fault on Secondary Transformer, lower end is furnished with road outlet, Active Power Filter-APF is connected with isolating switch upper end by linked reactor, Active Power Filter-APF is isolated harmonic current components and fundamental reactive current from load current, then its reversed polarity effect after-current is followed the tracks of and controlled the offset current producing, calculate the trigger impulse of each switching device of main circuit, this pulse acts on main circuit after drive circuit, only contains like this real component of first-harmonic in circuit.
Adopt Active Power Filter-APF to replace original distribution transformer integrated power distribution cabinet capacitance compensation part, the high order harmonic component of energy filtering appts, reduces harmonic loss, optimizes waveform, can also two-wayly carry out reactive power compensation; Active Power Filter-APF is by current transformer detection system electric current, and calculate by inner DSP, extract the harmonic components in load current, then by pwm signal, send to inner IGBT, control inverter produces one and load harmonic current equal and opposite in direction, the harmonic current injection of opposite direction, in electrical network, reaches the object of filtering.Active Power Filter-APF is active power filtering dynamically, improves the quality of power supply comprehensively; DSP full-digital control, switching frequency is high, to the dynamic change response of load rapidly; Active Power Filter-APF is compensating reactive power simultaneously; Possess three-phase imbalance compensation ability, there is automatic current limiting function, can not transship; Be installed in parallel mode, install simply, volume is little; Reduce line loss, the transformer that harmonic carcellation causes, with the motor feels hot, is realized system significantly energy-conservation; The filter effect of Active Power Filter-APF is not subject to system impedance variable effect, and can self-restration system resonance.
The invention has the beneficial effects as follows: use Active Power Filter-APF to adopt and concentrate filtering mode, harmonic wave on transformer low voltage side bus is totally administered, eliminate in real time to greatest extent the harmonic current on bus, improve the operational efficiency of transformer, guarantee the security of operation of transformer and power consumption equipment, avoid because harmonic current causes transformer operation exception, system resonance, lifting means useful life, avoid capacitor switching in the past to occur mending and owe the situation of mending.Case becomes structure and has technically the advantages such as modularization, volume are little, handsome in appearance, safe and reliable to operation, easy to maintenance, replace traditional JP cabinet and distribution transformer comprehensive distribution box, there is economically floor space little, conveniently moving, gos deep into that load center, construction period are short, the advantage such as cut the waste.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is circuit diagram of the present invention.
In Fig. 1, APF-Active Power Filter-APF,
QS-isolating switch,
1TAa/1TAb/1TAc-current transformer,
QF1/QF2 – wire-outgoing breaker,
QF3 – APF switch,
Fig. 2 is structural representation of the present invention.
In Fig. 2,1, Active Power Filter-APF circuit breaker, 2, linked reactor, 3, Active Power Filter-APF, 4, isolating switch, 5, current transformer, 6, wire-outgoing breaker, 7, cabinet shell.
Embodiment
The excellent ripple case of energy-conserving intelligent filtering compensation metering integrated protection of the present invention is arranged on the distribution transformer secondary side in city net, rural power grids; capacitance compensation part is in the past replaced with Active Power Filter-APF; Active Power Filter-APF accesses electrical network in parallel; by harmonic wave and the idle component of real-time detection load; adopt PWM converter technique; electric current with harmonic wave and idle component equal and opposite in direction, opposite direction is injected to power supply-distribution system, realize and suppress harmonic wave, function that dynamic compensation is idle.
As shown in Figure 1, Active Power Filter-APF is connected with Active Power Filter QF3 by linked reactor, and Active Power Filter QF3 and isolating switch are connected in the secondary side of power network current instrument transformer, connects terminal use's electrical network.Isolating switch upper end is directly connected with transformer 1TAa/1TAb/1TAc secondary side, and lower end is furnished with 2 tunnel outlets, and QF1/QF2 is wire-outgoing breaker, and Active Power Filter-APF APF is connected with isolating switch QS upper end by reactor, APF switch QF3.Active Power Filter-APF 3 is isolated harmonic current components and fundamental reactive current from load current, then its reversed polarity effect after-current is followed the tracks of and controlled the offset current producing, calculate the trigger impulse of each switching device of main circuit, this pulse acts on main circuit after drive circuit, only contains like this real component of first-harmonic in circuit.Thereby reach harmonic carcellation and the object of carrying out reactive power compensation, can effectively reduce the system loss causing because of harmonic current, system power waveform is effectively optimized, improve the quality of power supply.
Rated operational voltage: AC380V ± 15%;
Nominal operation frequency: 50Hz;
Rated capacity: module harmonic current rated capacity 100A;
In three-phase four-wire system, apply;
Switching frequency: 20kHz(is average);
Response time: <10ms;
Defencive function: overcurrent, overvoltage, IGBT are overheated, equipment overheat;
Power loss: during rated full load operation, loss is no more than 4% rated power;
As shown in Figure 2; the energy-conserving intelligent compensation metering integrated protection pressurizer tank of this embodiment; in casing 7, be provided with Active Power Filter-APF module 3, linked reactor 2, Active Power Filter 1, isolating switch 4, current transformer 5, wire-outgoing breaker 6; in Active Power Filter-APF module, be packaged with active power filter 3, also metering units be housed, Active Power Filter 1 comprises circuit breaker, fuse and controlled power electronic device.
Adopt Active Power Filter-APF to replace original distribution transformer integrated power distribution cabinet capacitance compensation part, the high order harmonic component of energy filtering appts, reduces harmonic loss, optimizes waveform, can also two-wayly carry out reactive power compensation; Active Power Filter-APF is by current transformer detection system electric current, and calculate by inner DSP, extract the harmonic components in load current, then by pwm signal, send to inner IGBT, control inverter produces one and load harmonic current equal and opposite in direction, the harmonic current injection of opposite direction, in electrical network, reaches the object of filtering.Active Power Filter-APF is active power filtering dynamically, improves the quality of power supply comprehensively; DSP full-digital control, switching frequency is high, to the dynamic change response of load rapidly; Active Power Filter-APF is compensating reactive power simultaneously; Possess three-phase imbalance compensation ability, there is automatic current limiting function, can not transship; Be installed in parallel mode, install simply, volume is little; Reduce line loss, the transformer that harmonic carcellation causes, with the motor feels hot, is realized system significantly energy-conservation; The filter effect of Active Power Filter-APF is not subject to system impedance variable effect, and can self-restration system resonance.
By filtering compensation function modoularization, be convenient to safeguard and replace; Because Active Power Filter-APF is modular member, there is function of measuring, by capacitance compensation segment set unification phantom blocking in distribution transformer integrated power distribution cabinet in the past, be convenient to install and change, and there is automatic failure alarm function, can when faults itself, not affect system safety stable operation.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (5)

1. an energy-conserving intelligent filtering compensation measures the excellent ripple case of integrated protection; comprise casing; in described casing, be provided with Active Power Filter-APF, linked reactor, Active Power Filter, isolating switch, current transformer, wire-outgoing breaker; it is characterized in that: described Active Power Filter-APF is connected with Active Power Filter by reactor, described Active Power Filter is connected and electrical network with isolating switch.
2. energy-conserving intelligent filtering compensation according to claim 1 measures the excellent ripple case of integrated protection, and described Active Power Filter-APF is encapsulated in Active Power Filter-APF module.
3. according to right, want the excellent ripple case of energy-conserving intelligent filtering compensation metering integrated protection described in 2, it is characterized in that: in Active Power Filter-APF module, metering units is housed.
4. the excellent ripple case of energy-conserving intelligent filtering compensation metering integrated protection according to claim 1, is characterized in that: Active Power Filter comprises circuit breaker, fuse and controlled power electronic device.
5. the excellent ripple case of energy-conserving intelligent filtering compensation metering integrated protection according to claim 1, is characterized in that: the excellent ripple case of energy-conserving intelligent filtering compensation metering integrated protection is arranged on the distribution transformer secondary side in city net, rural power grids.
CN201320584386.6U 2013-09-22 2013-09-22 Energy-saving intelligent filtering compensation measurement comprehensive protection wave optimization cabinet Expired - Fee Related CN203466568U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320584386.6U CN203466568U (en) 2013-09-22 2013-09-22 Energy-saving intelligent filtering compensation measurement comprehensive protection wave optimization cabinet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320584386.6U CN203466568U (en) 2013-09-22 2013-09-22 Energy-saving intelligent filtering compensation measurement comprehensive protection wave optimization cabinet

Publications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103515959A (en) * 2013-09-29 2014-01-15 安徽华正电气有限公司 Energy-saving intelligent filter compensation metering comprehensive protection automatic transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103515959A (en) * 2013-09-29 2014-01-15 安徽华正电气有限公司 Energy-saving intelligent filter compensation metering comprehensive protection automatic transmission
CN103515959B (en) * 2013-09-29 2016-01-27 安徽华正电气有限公司 The excellent ripple case of a kind of energy-conserving intelligent filtering compensation metering integrated protection

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Granted publication date: 20140305

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