CN105896583A - Peak load shifting and power quality comprehensive treatment system and working method thereof - Google Patents
Peak load shifting and power quality comprehensive treatment system and working method thereof Download PDFInfo
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- CN105896583A CN105896583A CN201610442226.6A CN201610442226A CN105896583A CN 105896583 A CN105896583 A CN 105896583A CN 201610442226 A CN201610442226 A CN 201610442226A CN 105896583 A CN105896583 A CN 105896583A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a peak load shifting and power quality comprehensive treatment system. The peak load shifting and power quality comprehensive treatment system is characterized by comprising a three-phase inverter module INV1, a three-phase inverter module INV2, a DC support capacitor, a bidirectional thyristor module, a controller I, a controller II, a transformer T2, a DC bus, a DC-DC converter and a storage battery; and the working method comprises two working modes, namely a normal AC voltage and an abnormal AC voltage of a power supply of the system. The peak load shifting and power quality comprehensive treatment system has the advantages of being high in response speed, high in standby efficiency, stable to work, simple in structure, low in product cost, convenient to maintain, easy to operate and relatively high in cost performance, and has an uninterruptible power supply function, a harmonic compensation function, a reactive power compensation function and a three-phase unbalance compensation function; the power consumption cost is reduced; and the economic benefits of enterprises are improved.
Description
(1) technical field:
The invention belongs to electrical equipment technical field, especially a kind of peak load shifting and comprehensive power quality
Governing system and method for work thereof.
(2) background technology:
Power plant is usually round-the-clock and persistently generates electricity, if the electricity sent cannot be dissolved in time, is used for
The energy utilization rate of generating then can reduce, especially to generation of electricity by new energy.One power plant generating capacity is led to
It is often relatively-stationary, but peak of power consumption is the most by day, thus cause daytime electric not enough
Phenomenon, then becomes low power consumption evening, causes power generation energy resource utilization rate to reduce, for this problem electric power
A part of peak load is moved to the low ebb phase by Peak-valley TOU power price means by system, to reach to save energy
The purpose in source.
Peak-valley TOU power price refers to the load variations situation according to electrical network, and 24 hours every days were divided into height
Multiple periods such as peak, flat section, low ebb, day part is formulated respectively different electricity price levels, to encourage
The Electricity customers reasonable arrangement electricity consumption time, peak load shifting, improves the utilization ratio of electric power resource.But
A lot of enterprises are relatively fixed the production time, therefore realize peak load shifting by energy storage mode and are more come
More multiple enterprises uses.Especially as accumulator and the development of Power Electronic Technique, based on accumulator great Rong
Amount peak load shifting pattern has been used widely.
For power supply reliability is required higher high-end manufacturing industry, corresponding solution is mainly attached most importance to
Want sensitive load configuration uninterrupted power source (UPS Uninterruptible Power System), online
Formula UPS is lost bigger and relatively costly online, and off-line UPS response speed cannot meet sensitivity more slowly
The requirement of load, uninterrupted power source is also based on batteries to store energy realization simultaneously, thus causes peak clipping to be filled out
Paddy energy storage device is reused with uninterrupted power source energy storage device, considerably increases investment of production, reduces
Business electrical efficiency.
Simultaneously along with harmonic pollution, power factor is low, and it is the most convex that three-phase imbalance steps on power quality problem
Aobvious, the main active filter of corresponding solution (APF Active power filter) is static
Reactive-load compensation generator (SVG Static Var Generator) etc., but due to these quality of power supply
Abatement equipment function singleness, considerably increases enterprise's investment of production equally.
(3) summary of the invention:
It is an object of the invention to propose a kind of peak load shifting and power quality harnessed synthetically system and work thereof
Making method, it can overcome the deficiencies in the prior art, is a kind of simple in construction, can meet again simultaneously
Peak load shifting and the comprehensive control of the quality of power supply, easy to use, the system of low cost, and method of work
Simply, easily realize.
Technical scheme: a kind of peak load shifting and power quality harnessed synthetically system, including electricity
Net, electric network source AC, grid side transformator T1, general load M1 and important load M2, it is special
Levy and be that it includes three-phase inverter module INV1, three-phase inverter module INV2, DC support electricity
Appearance, bidirectional thyristor module, controller I, controller II, transformator T2, dc bus, direct current-
DC converter and accumulator；Wherein, described inverter module INV1 and inverter module INV2 it
Between in DC side, back-to-back mode connects；Described DC support electric capacity is connected in parallel on two inverter modules
Between DC side；The input of described bidirectional thyristor module and the low-pressure side of grid side transformator T1
Connecting, its outfan is connected with important load M2；The input of described controller I gathers mutual induction of voltage
Device summation current transformer gathers electrical network and load side voltage and current signal, its outfan respectively with three contraries
Become device module I NV1, the control input of three-phase inverter module INV2 and two-phase thyristor module
Connect；Described dc bus respectively with three-phase inverter module INV1 and three-phase inverter module INV2
DC side connect, described dc bus is also simultaneously connected with the net side of DC-DC converter；Described directly
The net side of stream-DC converter is connected with dc bus, and its components and parts side is connected with accumulator；Described control
The input of device II processed gathers the voltage signal on dc bus and battery tension signal, its outfan
Input with DC-DC converter controls end and is connected；The high-pressure side of described transformator T2 and electrical network electricity
Source AC connects, and its low-pressure side is connected with the AC of three-phase inverter module INV2.
The input of described controller I gathers the voltage signal of grid side by voltage transformer pt 1,
Gathered the voltage x current letter of important load side by voltage transformer pt 2 summation current transformer CT1 simultaneously
Number, and the current signal of transformator T2 low-pressure side is gathered by Current Transmit 2.
Described DC-DC converter is no less than one；The quantity of described accumulator and DC-dc conversion
The quantity of device is identical, powers to respectively each DC-DC converter.
Described bidirectional thyristor module is made up of three bidirectional thyristors；Described accumulator battery is by accumulator
Monomer connection in series-parallel forms.
Described inverter DC support electric capacity is electrochemical capacitor or thin-film capacitor.
Described inverter module INV1 and inverter module INV2 is three-phase bridge inverter structure, three electricity
The structure that a kind of and LCL filter of flat inverter structure or three single-phase inverters combines.
Described transformator T2 is three-phase transformer, and low-pressure side is 380V or 400V, and high-pressure side is 6kV
Or 10kV.
Described DC-DC converter module be voltage raising and reducing circuit or direct current based on high frequency transformer-
DC converter.
A kind of peak load shifting and the method for work of power quality harnessed synthetically system, it is characterised in that its bag
Including the normal and abnormal two kinds of mode of operations of system power supply AC voltage, each pattern comprises the following steps:
(1) system power supply AC voltage normal mode of operation:
1., when system power supply AC is normal, controller I output K1 and K2 control signal makes three contraries
Becoming device module I NV1 and three-phase inverter module INV2 is operated under current source mode, controller I leads to
Over-current sensor CT1 and CT2 gathers three-phase inverter module INV1 and three-phase inverter module
The output electric current of INV2, it is achieved the current follow-up control to inverter；Three-phase inverter module INV1
Startup function is active power filtering, reactive-load compensation, three-phase imbalance compensation function；
2. controller I output-scr control signal triggers bidirectional thyristor module so that it is conducting；Typically
Load M1 is directly powered by transformator T1 by system power supply AC, for important load M2, is
System power supply AC is by transformator T1 and bidirectional thyristor module for power supply；
If 3. current electricity prices is at a low ebb, three-phase inverter module INV2 is operated under controlled rectification pattern,
Charging circuit DC-DC converter for accumulator provides energy, and controller II is by gathering accumulator
Voltage Vb1 ... Vbn and control output K3 ... it is accumulator charging that Kn controls DC-DC converter；
If 4. current electricity prices is in peak value, three-phase inverter module INV2 is operated under inverter mode, logical
Cross the discharge circuit DC-DC converter of accumulator accumulators store energy is released for load M1 and
M2 provides energy, and to reduce system power supply AC power consumption, controller II is by gathering battery tension
Vdc and control output K3 ... it is battery discharging that Kn controls DC-DC converter；
(2) system power supply AC electric voltage exception mode of operation:
1., when system power supply AC occurs voltage failure, controller I is detected by voltage sensor PT1
Judging voltage failure, controller I stops triggering bidirectional thyristor mould by output-scr control signal
Block, output K1 control signal makes three-phase inverter module INV1 stop current source Working mould immediately simultaneously
Formula, and effective shutoff of bidirectional thyristor is realized by back-pressure pulse method or load current transfer method,
Three-phase inverter module INV1 duty is switched to voltage source mode by current source mode；
2. controller I realizes three-phase inverter module INV1 output voltage by voltage sensor PT2 and closes
Ring controls to guarantee that important load M2 keeps normal work；Accumulator battery passes through DC-DC converter
Exchange output with three-phase inverter module INV1 DC side for three-phase inverter module INV1 and energy be provided,
Three-phase inverter module INV1 works with the normal of maintenance important load M1 as voltage source；Three contraries
Become device module I NV2 to quit work；
3., after system power supply AC is recovered normally, three-phase inverter module INV1 then exits voltage source work
Operation mode is also again started up current source mode of operation, and bidirectional thyristor is switched on to maintain the normal of load
Work, three-phase inverter module INV2 starts work.
The superiority of the present invention: 1, employ the IGCT technology that can rapidly switch off, not only has and is exceedingly fast
Response speed, treat that engine efficiency is high, working stability, and simple in construction, effectively save product one-tenth
This, it is simple to safeguard, it is easy to operation, cost performance is higher；2, active power filtering can be realized, reactive-load compensation,
Three-phase imbalance compensates function；3, by use back-to-back three-phase inverter, simultaneously by electric power system with
Seal in bidirectional thyristor module between load, not only can be realized based on peak-trough electricity by batteries to store energy
The peak load shifting function of valency, and uninterrupted power source function, harmonic compensation function, idle can be realized
Compensate function and three-phase imbalance compensates function；4, peak load cutting function and uninterrupted it is provided simultaneously with
Power supply function, is not the most only enterprise and saves electric cost, improve Business Economic Benefit simultaneously.
(4) accompanying drawing explanation:
Fig. 1 is the overall structure of a kind of peak load shifting involved by the present invention and power quality harnessed synthetically system
Block diagram.
Fig. 2 is two-way brilliant lock in a kind of peak load shifting involved by the present invention and power quality harnessed synthetically system
The structural representation of pipe.
Fig. 3 is a kind of peak load shifting involved by the present invention and accumulator battery in power quality harnessed synthetically system
Group mould mode structural representation.
(5) detailed description of the invention:
Embodiment: a kind of peak load shifting and power quality harnessed synthetically system (see Fig. 1), including electrical network,
Electric network source AC, grid side transformator T1, general load M1 and important load M2, its feature exists
In it include three-phase inverter module INV1, three-phase inverter module INV2, DC support electric capacity,
Bidirectional thyristor module, controller I, controller II, transformator T2, dc bus, DC-to-dc
Changer and accumulator；Wherein, between described inverter module INV1 and inverter module INV2 in
The back-to-back mode of DC side connects；Described DC support electric capacity is connected in parallel on the direct current of two inverter modules
Between side；The input of described bidirectional thyristor module is connected with the low-pressure side of grid side transformator T1,
Its outfan is connected with important load M2；The input of described controller I gathers voltage transformer and electricity
Current transformer gathers electrical network and load side voltage and current signal, its outfan respectively with three-phase inverter mould
Block INV1, the control input of three-phase inverter module INV2 and two-phase thyristor module connects；
Described dc bus respectively with three-phase inverter module INV1 and the direct current of three-phase inverter module INV2
Side connects, and described dc bus is also simultaneously connected with the net side of DC-DC converter；Described DC-to-dc
The net side of changer is connected with dc bus, and its components and parts side is connected with accumulator；Described controller II
Input gather the voltage signal on dc bus and battery tension signal, its outfan and direct current-
The input of DC converter controls end and connects；The high-pressure side of described transformator T2 is with electric network source AC even
Connecing, its low-pressure side is connected with the AC of three-phase inverter module INV2.
The input of described controller I gathers the voltage signal of grid side by voltage transformer pt 1,
Gathered the voltage x current letter of important load side by voltage transformer pt 2 summation current transformer CT1 simultaneously
Number, and the current signal (see Fig. 1) of transformator T2 low-pressure side is gathered by Current Transmit 2.
Described DC-DC converter is no less than one；The quantity of described accumulator and DC-dc conversion
The quantity of device is identical, powers (see Fig. 1) to respectively each DC-DC converter.
Described bidirectional thyristor module is formed (see Fig. 2) by three bidirectional thyristors；Described accumulator battery
(see Fig. 3) is formed by single battery connection in series-parallel.
Described inverter DC support electric capacity is electrochemical capacitor or thin-film capacitor.
Described inverter module INV1 and inverter module INV2 is three-phase bridge inverter structure, three electricity
The structure that a kind of and LCL filter of flat inverter structure or three single-phase inverters combines.
Described transformator T2 is three-phase transformer, and low-pressure side is 380V or 400V, and high-pressure side is 6kV
Or 10kV.
Described DC-DC converter module be voltage raising and reducing circuit or direct current based on high frequency transformer-
DC converter.
A kind of peak load shifting and the method for work of power quality harnessed synthetically system, it is characterised in that its bag
Including the normal and abnormal two kinds of mode of operations of system power supply AC voltage, each pattern comprises the following steps:
(1) system power supply AC voltage normal mode of operation:
1., when system power supply AC is normal, controller I output K1 and K2 control signal makes three contraries
Becoming device module I NV1 and three-phase inverter module INV2 is operated under current source mode, controller I leads to
Over-current sensor CT1 and CT2 gathers three-phase inverter module INV1 and three-phase inverter module
The output electric current of INV2, it is achieved the current follow-up control to inverter；Three-phase inverter module INV1
Startup function is active power filtering, reactive-load compensation, three-phase imbalance compensation function；
2. controller I output-scr control signal triggers bidirectional thyristor module so that it is conducting；Typically
Load M1 is directly powered by transformator T1 by system power supply AC, for important load M2, is
System power supply AC is by transformator T1 and bidirectional thyristor module for power supply；
If 3. current electricity prices is at a low ebb, three-phase inverter module INV2 is operated under controlled rectification pattern,
Charging circuit DC-DC converter for accumulator provides energy, and controller II is by gathering accumulator
Voltage Vb1 ... Vbn and control output K3 ... it is accumulator charging that Kn controls DC-DC converter；
If 4. current electricity prices is in peak value, three-phase inverter module INV2 is operated under inverter mode, logical
Cross the discharge circuit DC-DC converter of accumulator accumulators store energy is released for load M1 and
M2 provides energy, and to reduce system power supply AC power consumption, controller II is by gathering battery tension
Vdc and control output K3 ... it is battery discharging that Kn controls DC-DC converter；
(2) system power supply AC electric voltage exception mode of operation:
1., when system power supply AC occurs voltage failure, controller I is detected by voltage sensor PT1
Judging voltage failure, controller I stops triggering bidirectional thyristor mould by output-scr control signal
Block, output K1 control signal makes three-phase inverter module INV1 stop current source Working mould immediately simultaneously
Formula, and effective shutoff of bidirectional thyristor is realized by back-pressure pulse method or load current transfer method,
Three-phase inverter module INV1 duty is switched to voltage source mode by current source mode；
2. controller I realizes three-phase inverter module INV1 output voltage by voltage sensor PT2 and closes
Ring controls to guarantee that important load M2 keeps normal work；Accumulator battery passes through DC-DC converter
Exchange output with three-phase inverter module INV1 DC side for three-phase inverter module INV1 and energy be provided,
Three-phase inverter module INV1 works with the normal of maintenance important load M1 as voltage source；Three contraries
Become device module I NV2 to quit work；
3., after system power supply AC is recovered normally, three-phase inverter module INV1 then exits voltage source work
Operation mode is also again started up current source mode of operation, and bidirectional thyristor is switched on to maintain the normal of load
Work, three-phase inverter module INV2 starts work.
Claims (9)
1. peak load shifting and a power quality harnessed synthetically system, including electrical network, electric network source AC,
Grid side transformator T1, general load M1 and important load M2, it is characterised in that it includes three contraries
Become device module I NV1, three-phase inverter module INV2, DC support electric capacity, bidirectional thyristor module,
Controller I, controller II, transformator T2, dc bus, DC-DC converter and accumulator；
Wherein, between described inverter module INV1 and inverter module INV2 in DC side back-to-back mode
Connect；Described DC support electric capacity is connected in parallel between the DC side of two inverter modules；Described is double
Low-pressure side to the input of thyristor module with grid side transformator T1 is connected, and its outfan is with important
Load M2 is connected；The input of described controller I gathers voltage transformer summation current transformer and gathers electricity
Net and load side voltage and current signal, its outfan respectively with three-phase inverter module INV1, three contraries
The control input becoming device module I NV2 and two-phase thyristor module connects；Described dc bus is respectively
It is connected with the DC side of three-phase inverter module INV1 and three-phase inverter module INV2, described direct current
Bus is also simultaneously connected with the net side of DC-DC converter；The net side of described DC-DC converter is with straight
Stream bus connects, and its components and parts side is connected with accumulator；The input of described controller II gathers direct current
The input of the voltage signal on bus and battery tension signal, its outfan and DC-DC converter
Control end to connect；The high-pressure side of described transformator T2 is connected with electric network source AC, its low-pressure side and three
The AC of phase inverter module I NV2 connects.
The most according to claim 1, a kind of peak load shifting and power quality harnessed synthetically system, it is special
Levy the input being described controller I and gathered the voltage signal of grid side by voltage transformer pt 1,
Gathered the voltage x current letter of important load side by voltage transformer pt 2 summation current transformer CT1 simultaneously
Number, and the current signal of transformator T2 low-pressure side is gathered by Current Transmit 2.
The most according to claim 1, a kind of peak load shifting and power quality harnessed synthetically system, it is special
Levy and be that described DC-DC converter is no less than one；The quantity of described accumulator becomes with DC-to-dc
The quantity of parallel operation is identical, powers to respectively each DC-DC converter.
The most according to claim 1, a kind of peak load shifting and power quality harnessed synthetically system, it is special
Levy and be that described bidirectional thyristor module is made up of three bidirectional thyristors；Described accumulator battery is by electric power storage
Pond monomer connection in series-parallel composition.
The most according to claim 1, a kind of peak load shifting and power quality harnessed synthetically system, it is special
Levy and be that described DC support electric capacity is electrochemical capacitor or thin-film capacitor.
The most according to claim 1, a kind of peak load shifting and power quality harnessed synthetically system, it is special
Levy be described inverter module INV1 and inverter module INV2 be three-phase bridge inverter structure, three
The structure that a kind of and LCL filter of electrical level inverter structure or three single-phase inverters combines.
The most according to claim 1, a kind of peak load shifting and power quality harnessed synthetically system, it is special
Levying and be that described transformator T2 is three-phase transformer, low-pressure side is 380V or 400V, and high-pressure side is
6kV or 10kV.
The most according to claim 1, a kind of peak load shifting and power quality harnessed synthetically system, it is special
Levy and be that described DC-DC converter is voltage raising and reducing circuit or direct current based on high frequency transformer-straight
Current converter.
9. a peak load shifting and the method for work of power quality harnessed synthetically system, it is characterised in that it
Including the normal and abnormal two kinds of mode of operations of system power supply AC voltage, each pattern comprises the following steps:
(1) system power supply AC voltage normal mode of operation:
1., when system power supply AC is normal, controller I output K1 and K2 control signal makes three contraries
Becoming device module I NV1 and three-phase inverter module INV2 is operated under current source mode, controller I leads to
Over-current sensor CT1 and CT2 gathers three-phase inverter module INV1 and three-phase inverter module
The output electric current of INV2, it is achieved the current follow-up control to inverter；Three-phase inverter module INV1
Startup function is active power filtering, reactive-load compensation, three-phase imbalance compensation function；
2. controller I output-scr control signal triggers bidirectional thyristor module so that it is conducting；Typically
Load M1 is directly powered by transformator T1 by system power supply AC, for important load M2, is
System power supply AC is by transformator T1 and bidirectional thyristor module for power supply；
If 3. current electricity prices is at a low ebb, three-phase inverter module INV2 is operated under controlled rectification pattern,
Charging circuit DC-DC converter for accumulator provides energy, and controller II is by gathering accumulator
Voltage Vb1 ... Vbn and control output K3 ... it is accumulator charging that Kn controls DC-DC converter；
If 4. current electricity prices is in peak value, three-phase inverter module INV2 is operated under inverter mode, logical
Cross the discharge circuit DC-DC converter of accumulator accumulators store energy is released for load M1 and
M2 provides energy, and to reduce system power supply AC power consumption, controller II is by gathering battery tension
Vdc and control output K3 ... it is battery discharging that Kn controls DC-DC converter；
(2) system power supply AC electric voltage exception mode of operation:
1., when system power supply AC occurs voltage failure, controller I is detected by voltage sensor PT1
Judging voltage failure, controller I stops triggering bidirectional thyristor mould by output-scr control signal
Block, output K1 control signal makes three-phase inverter module INV1 stop current source Working mould immediately simultaneously
Formula, and effective shutoff of bidirectional thyristor is realized by back-pressure pulse method or load current transfer method,
Three-phase inverter module INV1 duty is switched to voltage source mode by current source mode；
2. controller I realizes three-phase inverter module INV1 output voltage by voltage sensor PT2 and closes
Ring controls to guarantee that important load M2 keeps normal work；Accumulator battery passes through DC-DC converter
Exchange output with three-phase inverter module INV1 DC side for three-phase inverter module INV1 and energy be provided,
Three-phase inverter module INV1 works with the normal of maintenance important load M1 as voltage source；Three contraries
Become device module I NV2 to quit work；
3., after system power supply AC is recovered normally, three-phase inverter module INV1 then exits voltage source work
Operation mode is also again started up current source mode of operation, and bidirectional thyristor is switched on to maintain the normal of load
Work, three-phase inverter module INV2 starts work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610442226.6A CN105896583B (en) | 2016-06-16 | 2016-06-16 | A kind of peak load shifting and power quality harnessed synthetically system and its working method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610442226.6A CN105896583B (en) | 2016-06-16 | 2016-06-16 | A kind of peak load shifting and power quality harnessed synthetically system and its working method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105896583A true CN105896583A (en) | 2016-08-24 |
| CN105896583B CN105896583B (en) | 2019-04-23 |
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| CN106385043A (en) * | 2016-09-13 | 2017-02-08 | 天津理工大学 | Multiple parallel electric power peak-load shifting device having uninterrupted power source function |
| CN107465196A (en) * | 2017-09-08 | 2017-12-12 | 深圳供电局有限公司 | A kind of breaking circuit for voltage compensating device |
| CN109167375A (en) * | 2018-10-23 | 2019-01-08 | 兰州理工大学 | Electric automobile charging station three-phase voltage autobalance charging system and charging method |
| CN110504687A (en) * | 2019-08-16 | 2019-11-26 | 深圳市伊力科电源有限公司 | Power quality harnessed synthetically system and method |
| CN111384752A (en) * | 2020-03-16 | 2020-07-07 | 深圳供电局有限公司 | Power distribution device, power distribution system and power distribution method |
| CN115051398A (en) * | 2022-06-22 | 2022-09-13 | 普世通（北京）电气有限公司 | Dynamic voltage compensation device and multi-mode fast switching control method thereof |
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| CN115051398A (en) * | 2022-06-22 | 2022-09-13 | 普世通（北京）电气有限公司 | Dynamic voltage compensation device and multi-mode fast switching control method thereof |
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