CN109638866A - Based on the transient voltage Initiative Defense device for being switched fast switch and hybrid energy-storing - Google Patents
Based on the transient voltage Initiative Defense device for being switched fast switch and hybrid energy-storing Download PDFInfo
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- CN109638866A CN109638866A CN201811539687.0A CN201811539687A CN109638866A CN 109638866 A CN109638866 A CN 109638866A CN 201811539687 A CN201811539687 A CN 201811539687A CN 109638866 A CN109638866 A CN 109638866A
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- 230000007123 defense Effects 0.000 title claims abstract description 12
- 230000001052 transient effect Effects 0.000 title claims abstract description 12
- 238000004146 energy storage Methods 0.000 claims abstract description 90
- 238000010168 coupling process Methods 0.000 claims abstract description 16
- 238000005859 coupling reaction Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 11
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 14
- 230000005611 electricity Effects 0.000 claims description 7
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- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 230000006870 function Effects 0.000 description 6
- 230000005389 magnetism Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000001131 transforming effect Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
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Classifications
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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
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The present invention provides a kind of based on the transient voltage Initiative Defense device for being switched fast switch and hybrid energy-storing, including low-pass filter, by-pass switch, main switch, coupling transformer, converter plant and energy storage device.1) permanent-magnetic switching is used, as by-pass switch, to solve the problems, such as the integrity problem of power supply and energy storage switching and the voltage distortion of handoff procedure as main switch, using permanent-magnetic switching and thyristor switch parallel connection；2) hybrid energy-storing mode is used, it is insufficient to solve single energy storage mode bring.3) IGBT full-control type bidirectional converter is used, charging-discharging structure is simplified.Can guarantee that the voltage for supplying load-side remains in the normal range, even if can also accomplish the temporary drop compensation of voltage in the case where source side stops, can not be to load supplying, electric energy be supplied using energy storage device and loaded.
Description
Technical field
The present invention relates to power system voltage compensation technique fields, in particular to a kind of to be based on being switched fast switch and mixing
The transient voltage Initiative Defense device of energy storage.
Background technique
With the development of economy and society, the scale of power grid is more huge, and structure is also increasingly sophisticated.Power grid operates normally
When, voltage is generally stabilized in a certain normal range (NR), to guarantee that the load of its supply can work in optimum state.But in electricity
It in net operational process, will appear various disturbing factors often, so that network voltage fluctuates, work as voltage fluctuation range
It is excessive, when exceeding normal range (NR), many adverse effects can be brought to supply load.For example, occur in the system short trouble or
When load largely accesses suddenly, network voltage can be made to decline, this abnormal low-voltage can make the equipment on production line can not
It works normally, causes scrapping for product, in some instances it may even be possible to equipment can be damaged, cause to stop production.Therefore it needs to take measures to guarantee load
Stable, continual electric energy supply can be obtained always.
Common measure is using voltage compensating device.When deficiency occurs in the electric energy supply to load, so that load voltage water
When putting down lower than normal range (NR), voltage compensating device can play the role of power supply, provide electric energy for load, and the voltage of load is mended
It repays to normal range (NR).Residual quantity compensation can be divided into compensate with temporarily drop.Residual quantity compensation, which refers to, monitors load voltage in real time, when it is inclined
When from normal range (NR), the amount of will deviate from enables voltage compensating device compensate this deviation as control amount by certain control strategy
Amount, compensation is the difference of normal voltage level Yu virtual voltage level.Temporarily drop compensation refers to that predetermined normal voltage is horizontal, when
When load voltage deviates normal level, power unit is disconnected, and is only compensated load voltage to normal level by compensation device, to electricity
After source causes the factor of voltage fluctuation to be eliminated, then again by power supply power supply.It is compensated compared to residual quantity, temporarily drops indemnifying measure to monitoring
It is lower with control section requirement, a default fixed offset only need to be preset, in the situation that voltage fluctuation is more frequent
Under be not susceptible to failure, remain to effective compensation, but to the more demanding of compensation ability, furthermore using temporarily drop compensation when, due to therefore
It is only powered by compensation device to load in the case of barrier, therefore it is required that the power supply reliability of device wants high.
The deficiencies in the prior art are mainly reflected in three aspects:
First aspect is the switching time of switch generally all in Millisecond, and transit time existing for centre is long, longest
Can reach 10 milliseconds or so.In addition, generate voltage distortion in handoff procedure, to precision instrument and equipment, there are biggish peaces
Full hidden danger.
Second aspect is the reliability of switching device.In the above-mentioned technical solutions, switching device (open with bypass by main switch
Close) it is the core that guarantees device and can normally play a role.When main switch and by-pass switch work normally, pass through upper one
The part workflow, can guarantee the uninterrupted power supply under any circumstance to load.When any one switch appearance is different
Chang Shi can make device not can guarantee the uninterrupted power supply to load under any circumstance, therefore the reliability of switching device
It is most important to device.Substantially all more mature based on spring operating mechanism using technology in current existing technical solution
Mechanical switch.This mechanical switch realizes the opening and closing of switch using the elastic potential energy of spring, due to fully relying on machinery
Transmission device, therefore overall mechanism is complex, part used is more, and service life is shorter, is unable to satisfy frequently dynamic for a long time
The requirement of work.
The third aspect is the energy storage mode of energy storage section.Power supply capacity of the selection of energy storage mode concerning device.It is main at present
The energy storage mode of stream includes batteries to store energy and ultracapacitor energy storage two ways, for both corresponding controls of energy storage mode
Strategy processed has multinomial patent and is studied.But take at present all for single energy storage mode, i.e., from battery group with it is super
It selects a kind of as energy-storage travelling wave tube between capacitor group, and corresponding control strategy is cooperated to form complete energy storage section.This two
Kind energy-storage travelling wave tube all haves the shortcomings that respective.The shortcomings that single battery group energy storage mode, is the limit by battery charge characteristic
System is only suitable for absorbing and fluctuates smaller, the more stable electric energy of output, in the biggish system of energy fluctuation, absorption meeting
It is greatly affected, causes the waste of electric energy in absorption process, in some instances it may even be possible to be affected by this, battery group itself is damaged.
The shortcomings that single supercapacitor group energy storage mode, is to be limited by manufacturing technology, compares battery group, can absorb simultaneously
The electric energy of storage is less, and furthermore supercapacitor group itself cost is relatively high, largely not economical enough when investment.
As can be seen that being improved the switching device of conventional voltage compensation method in terms of three above, by energy storage side
Formula is changed into hybrid energy-storing mode by single energy storage mode, for reducing the switching time of device, improving the reliability, excellent of device
Disguising the compensation ability set has innovative value.
Summary of the invention
In order to solve the problems, such as described in background technique, the present invention provides a kind of based on being switched fast switch and hybrid energy-storing
Transient voltage Initiative Defense device, 1) made using permanent-magnetic switching as main switch, using permanent-magnetic switching and thyristor switch parallel connection
For by-pass switch, the integrity problem of power supply and energy storage switching and the voltage distortion of handoff procedure are solved the problems, such as；2) using mixed
Energy storage mode is closed, it is insufficient to solve single energy storage mode bring.3) IGBT full-control type bidirectional converter is used, charge and discharge are simplified
Structure.Can guarantee supply load-side voltage remain in the normal range, even if source side stop, can not be to load
In the case where power supply, it can also accomplish the temporary drop compensation of voltage, electric energy is supplied using energy storage device and is loaded.
In order to achieve the above object, the present invention is implemented with the following technical solutions:
It is a kind of based on the transient voltage Initiative Defense device for being switched fast switch and hybrid energy-storing, including low-pass filter,
By-pass switch, main switch, coupling transformer, converter plant and energy storage device.
The low-pass filter and main switch are sequentially connected by power supply end to the load end of power grid；The master opens
Close both ends parallel connection by-pass switch；AC power source all the way is drawn on transmission line of electricity between main switch and load, this road alternating current
Source passes sequentially through coupling transformer and converter plant is connected to energy storage device.
The main switch is permanent-magnetic switching breaker one；The by-pass switch is by permanent-magnetic switching breaker two and brilliant lock
Pipe switch in parallel is constituted.
The energy storage device includes energy storage battery group and energy-storage capacitor group；The energy storage battery group is multiple
Battery is connected in series, and the energy-storage capacitor group is to be made of multiple energy storage capacitor in series；Energy storage battery group and energy storage
Capacitor group is in parallel, the DC side both ends of connection converter plant in both ends in parallel.
The thyristor switch is bi-directional thyristor switch.
The converter plant controls biphase rectification inverter/converter using IGBT entirely.
A method of based on the transient voltage Initiative Defense device for being switched fast switch and hybrid energy-storing, including following step
It is rapid:
Step 1: by network voltage observation circuit real-time monitoring source side voltage；Main switch is closed under original state, bypass
Switch disconnects；
Step 2: main switch is kept closed when detecting that source side voltage is in range of normal value, by-pass switch
It remains off, charging unit acts in energy storage device, and converter plant does not work, and the electrical energy for storage for absorbing source side rises
Come, until full capacity；Power flow on route are as follows: power supply-main switch-load；
Step 3: observation circuit issues letter when detecting source side voltage due to fluctuation beyond or below normal range (NR)
Command main switch disconnects, and by-pass switch still remains off, and charging unit stops working in energy storage device, and converter plant starts
The energy of storage is conveyed to load-side by work, energy storage device, the electricity of load-side when the voltage of load-side and source side being made to power
Pressure is consistent, that is, realizes the compensation of voltage；Power flow on route at this time are as follows: energy storage device-coupling transformer-load；
Step 4: observation circuit issues signal and enables master when detecting that source side voltage comes back in range of normal value
It closing the switch, by-pass switch still remains off, and charging unit is started to work in energy storage device, and converter plant stops working,
The electric energy for absorbing source side makes up the electric energy consumed before；Power flow on route are as follows: power supply-main switch-load；Power supply-
Coupling transformer-energy storage device；
Step 5: main switch disconnects when main switch breaks down or needs to overhaul, by-pass switch closure makes source side
It still keeps being connected to load-side；When by-pass switch acts, bidirectional triode thyristor is first acted, and permanent-magnetic switching reoperates；Equal permanent-magnetic switchings
After fully switched on, bidirectional triode thyristor stops working；Power flow on route at this time are as follows: power supply-by-pass switch-load.
Further, when circuit communication between source side and load-side, energy storage device absorbs electric energy from source side and stores up
It leaves and, when absorbing, AC energy is decomposed first by control device, using Fourier transformation, electric energy is decomposed into two
Point: a part is that vibration frequency is larger but the lesser component of amplitude, is sent after rectification to energy-storage capacitor group and is stored；Another part is
Vibration frequency is smaller but the biggish component of amplitude, is sent after rectification to energy storage battery group and is stored.
Compared with prior art, the beneficial effects of the present invention are:
1, replace traditional spring mechanism mechanical switch using permanent-magnetic switching device, selected with permanent-magnet manipulating mechanism and be
The mechanical switch of the heart.Compared with conventional mechanical switch, permanent magnetism mechanical switch uses twin coil control mode, i.e. closing coil is only controlled
Feed motion processed, opening coil only control sub-switching operation, improve the reliability of switching device.Meanwhile it being grasped with traditional spring
Motivation structure is compared, and transmission mechanism greatly simplifies, and service life also improves three times or so.
2, the method that by-pass switch part uses permanent magnetism mechanical switch to combine with bidirectional triode thyristor electronic switch.It plays double
To the fireballing advantage of silicon-controlled electronic switch, guarantee that load power is uninterrupted.It is double meanwhile after permanent magnetism mechanical switch is opened
It stops working to silicon-controlled electronic switch, reduces the running wastage of electronic switch.In addition, electronic switch does not have to plus heat dissipation dress
It sets.
3, energy storage section replaces traditional single energy storage mode, using battery group-supercapacitor group hybrid energy-storing side
Formula.Both it can reduce the impact for fluctuating biggish electric energy to battery group, while the electric energy that also amplitude can be prevented excessive is to super
The damage of capacitor group.It will be due to single energy storage mode in reliability and economy.
4, energy storage section, can be with unsteady flow portion without being individually equipped with a transformer and a set of rectification unit or charhing unit
Divide and share a transformer, and only realizes time-sharing charging and electric discharge with a set of current transforming unit.Investment is saved, land occupation is reduced
Area.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is energy storage device and deflector structure figure of the invention；
Fig. 3 is bi-directional thyristor switch circuit diagram；
Fig. 4 is that IGBT controls biphase rectification inverter/converter circuit structure diagram entirely；
Fig. 5 is the iron core and two coil configuration schematic diagram of permanent-magnetic switching breaker.
1- moves iron core 2- permanent magnet 3- closing coil 4- opening coil 5- fixed core.
Specific embodiment
Specific embodiment provided by the invention is described in detail below in conjunction with attached drawing.
As shown in Figure 1, of the invention is a kind of based on the transient voltage Initiative Defense dress for being switched fast switch and hybrid energy-storing
It sets, including low-pass filter, by-pass switch, main switch, coupling transformer, converter plant and energy storage device.
The low-pass filter and main switch are sequentially connected by power supply end to the load end of power grid；The master opens
Close both ends parallel connection by-pass switch；AC power source all the way is drawn on transmission line of electricity between main switch and load, this road alternating current
Source passes sequentially through coupling transformer and converter plant is connected to energy storage device.
The main switch is permanent-magnetic switching breaker one；The by-pass switch is by permanent-magnetic switching breaker two and brilliant lock
Pipe switch in parallel is constituted.
As shown in Fig. 2, the energy storage device includes energy storage battery group and energy-storage capacitor group；The energy storage electric power storage
Pond group is that multiple batteries are connected in series, and the energy-storage capacitor group is to be made of multiple energy storage capacitor in series；Energy storage electric power storage
Chi Zuyu energy-storage capacitor group is in parallel, the DC side both ends of connection converter plant in both ends in parallel.
As shown in figure 3, the thyristor switch is bi-directional thyristor switch.
As shown in figure 4, the converter plant controls biphase rectification inverter/converter using IGBT entirely.
1, low-pass filter
Functions of low-pass filter is the harmonic wave filtered out in transmission process, can also play the role of reducing voltage fluctuation.Usually
It is made of various power electronic equipments, to realize its filter function.Low-pass filter can be any one in the prior art
Low-pass filter type.
2, main switch
Main switch function is to control the connection of circuit between source side and load-side.When main switch disconnect when, source side with
Circuit disconnects between load-side, and source side stops providing electric energy to load-side；When main switch closure, source side and load-side it
Between circuit communication, provide electric energy by the lateral load-side of power supply at this time.
Configuration aspects, main switch uses the mechanical switch disconnector of permanent magnetism in this programme.Main permanent-magnetic switching breaker is height
A kind of breaker form used in pressure field, iron core form Some principles such as Fig. 5, including movable core 1, permanent magnet 2,
Closing coil 3, opening coil 4, fixed core 5.Dynamic iron core 1 is connected with switch tool arm, and switch is driven to move up and down.Fixed core 5
Top half is open position, lower half portion is closing position.Permanent magnet 2 keeps dynamic iron core for providing permanent-magnetic field
In a certain position.Closing coil 3 and opening coil 4 are used to generate variable magnetic field when being powered, and dynamic iron core 1 is driven to move up and down.
The main switch course of work are as follows: when the switch is in the open position, dynamic iron core 1 is located at 5 top half of fixed core, by this
It influences, dynamic iron core 1 is maintained at quiet in the top half for moving iron core 1, the attraction of generation by the magnetic field concentration that permanent magnet 2 generates
5 top half of iron core, so that switch is constantly in off-state, it will not malfunction closure；When needing to close the switch, first to conjunction
Brake cable circle 3 is powered, and the magnetic fields that closing coil 3 generates generate sufficiently large attraction, overcome in dynamic 1 lower half portion of iron core
The attraction of permanent magnet 2 makes iron core 1 be moved to the lower half portion of fixed core 5, while driving and closing the switch；When dynamic iron core 1
Closing position is reached, after closing the switch, closing coil 3 is no longer powered, and variable magnetic field disappears, at this time by dynamic 1 position shadow of iron core
It rings, dynamic iron core is maintained at fixed core in the lower half portion of dynamic iron core, the attraction of generation by the magnetic field concentration that permanent magnet 2 generates
5 lower half portion, so that switch is constantly in closed state, it will not malfunction disconnection；When needing to switch disconnection, separating brake line is given first
Circle 4 is powered, and the magnetic fields that opening coil 4 generates generate sufficiently large attraction in dynamic 1 top half of iron core, overcomes permanent
The attraction of magnet 2 makes iron core 1 be moved to the top half of fixed core, while switch being driven to disconnect.
3, by-pass switch
It is parallel to main switch both ends in circuit.Major function is in main switch due to faults itself or because of regular maintenance
Needs and when can not be closed, by being closed by-pass switch so that between source side and load-side circuit still in connected state,
It does not influence to play back-up protection to the normal power supply of load.
By-pass switch is in such a way that permanent magnetism machinery switch disconnector adds thyristor (silicon-controlled) two-way switch in this programme.
4, energy-storage units
Energy-storage units are using battery in such a way that super capacitor combines.
The function of energy-storage units is to incite somebody to action when source side surveys offer electric energy without normal load because of a variety of causes as power supply
The energy of itself storage is supplied to load, serves as the effect of power supply.Chief component be battery group, supercapacitor group,
Charhing unit.Battery group be a series of batteries be connected in series, supercapacitor group be array of super capacitor connect and
At.It is parallel relationship between battery group and supercapacitor group, for storing electric energy and being supplied to when suitable load.
Charhing unit realizes the conversion between alternating current and direct current.Since energy-storage travelling wave tube can only absorb and discharge direct current energy, and it is electric
The electric energy that source and load-side are circulated is three-phase alternating current, it is therefore desirable to which current transforming unit converts electrical energy into direct current.Charging is single
Member is realized by current transforming unit, saves a set of charhing unit.
The workflow of energy-storage units is as follows:
When circuit communication between source side and load-side, energy-storage units absorb electrical energy for storage from source side and get off.
When circuit disconnects between source side and load-side, energy-storage units serve as power supply, and the electric energy stored by itself is passed through
It is sent after converter plant to load-side, compensates load-side and source side disconnects and reduced voltage, it is suitable that proof load remains to obtain
Electric energy supply, realize uninterrupted power supply.
5, coupling transformer
Coupling transformer function is voltage of transformation grade.Since the charging voltage of battery and supercapacitor is lower, because
This needs to be input to reduction using coupling transformer the voltage of energy-storage travelling wave tube, prevents overtension from damaging element, raises simultaneously
Energy-storage travelling wave tube is exported to the voltage of load-side, with the normal power supply of proof load.
The workflow of described device is as follows:
By existing network voltage observation circuit real-time monitoring source side voltage.Main switch is closed under original state, bypass
Switch disconnects.
When detecting that source side voltage is in range of normal value, main switch is kept closed, and by-pass switch keeps disconnected
Open state, charging unit movement, converter plant do not work in energy storage device, absorb the electrical energy for storage of source side, until
Full capacity.Power flow on route are as follows: power supply-main switch-load.
When detecting source side voltage due to fluctuation beyond or below normal range (NR), observation circuit, which issues signal, enables master open
Shutdown is opened, and by-pass switch still remains off, and charging unit stops working in energy storage device, and converter plant is started to work, storage
The energy of storage is conveyed to load-side by energy device, and the voltage of load-side keeps one when the voltage of load-side and source side being made to power
It causes, that is, realizes the compensation of voltage.Power flow on route at this time are as follows: energy storage device-coupling transformer-load.
When detecting that source side voltage comes back in range of normal value, observation circuit, which issues signal, enables main switch close
It closes, by-pass switch still remains off, and charging unit is started to work in energy storage device, and converter plant stops working, and absorbs electricity
The electric energy that the electric energy of source consumes before making up.Power flow on route are as follows: power supply-main switch-load；Power supply-coupling becomes
Depressor-energy storage device.
When main switch breaks down or needs to overhaul, main switch is disconnected, and by-pass switch closure makes source side and load-side
It still keeps being connected to.When by-pass switch acts, bidirectional triode thyristor is first acted, and permanent-magnetic switching reoperates.Equal permanent-magnetic switchings are fully switched on
Afterwards, bidirectional triode thyristor stops working.Power flow on route at this time are as follows: power supply-by-pass switch-load.
Further, when circuit communication between source side and load-side, energy storage device absorbs electric energy from source side and stores up
It leaves and, when absorbing, AC energy is decomposed first by control device, using Fourier transformation, electric energy is decomposed into two
Point: a part is that vibration frequency is larger but the lesser component of amplitude, is sent after rectification to energy-storage capacitor group and is stored；Another part is
Vibration frequency is smaller but the biggish component of amplitude, is sent after rectification to energy storage battery group and is stored.
By the above course of work, it can guarantee that the voltage for supplying load-side remains in the normal range, even if
In the case that source side stopping can not be to load supplying, it can also accomplish the temporary drop compensation of voltage, be supplied electric energy using energy storage device
To load.
Above embodiments are implemented under the premise of the technical scheme of the present invention, give detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to the above embodiments.Method therefor is such as without spy in above-described embodiment
Not mentionleting alone bright is conventional method.
Claims (4)
1. a kind of based on the transient voltage Initiative Defense device for being switched fast switch and hybrid energy-storing, which is characterized in that including low
Bandpass filter, by-pass switch, main switch, coupling transformer, converter plant and energy storage device；
The low-pass filter and main switch are sequentially connected by power supply end to the load end of power grid；The main switch two
Hold by-pass switch in parallel；Draw AC power source all the way on transmission line of electricity between main switch and load, this road AC power source according to
It is secondary that energy storage device is connected to by coupling transformer and converter plant；
The main switch is permanent-magnetic switching breaker one；The by-pass switch is opened by permanent-magnetic switching breaker two and thyristor
Close in parallel constitute；
The energy storage device includes energy storage battery group and energy-storage capacitor group；The energy storage battery group is multiple electric power storages
Pond is connected in series, and the energy-storage capacitor group is to be made of multiple energy storage capacitor in series；Energy storage battery group and storage capacitor
Device group is in parallel, the DC side both ends of connection converter plant in both ends in parallel.
2. according to claim 1 a kind of based on the transient voltage Initiative Defense dress for being switched fast switch and hybrid energy-storing
It sets, which is characterized in that the thyristor switch is bi-directional thyristor switch.
3. according to claim 1 a kind of based on the transient voltage Initiative Defense dress for being switched fast switch and hybrid energy-storing
It sets, which is characterized in that the converter plant controls biphase rectification inverter/converter using IGBT entirely.
4. a kind of side described in claim 1 based on the transient voltage Initiative Defense device for being switched fast switch and hybrid energy-storing
Method, which comprises the following steps:
Step 1: by network voltage observation circuit real-time monitoring source side voltage；Main switch is closed under original state, by-pass switch
It disconnects；
Step 2: main switch is kept closed when detecting that source side voltage is in range of normal value, by-pass switch is kept
Off-state, charging unit movement, converter plant do not work in energy storage device, absorb the electrical energy for storage of source side, directly
To full capacity；Power flow on route are as follows: power supply-main switch-load；
Step 3: observation circuit issues signal and enables when detecting source side voltage due to fluctuation beyond or below normal range (NR)
Main switch disconnects, and by-pass switch still remains off, and charging unit stops working in energy storage device, and converter plant starts work
Make, the energy of storage is conveyed to load-side by energy storage device, the voltage of load-side when the voltage of load-side and source side being made to power
It is consistent, that is, realizes the compensation of voltage；Power flow on route at this time are as follows: energy storage device-coupling transformer-load；
Step 4: observation circuit issues signal and enables main switch when detecting that source side voltage comes back in range of normal value
Closure, by-pass switch still remain off, and charging unit is started to work in energy storage device, and converter plant stops working, and absorb
The electric energy that the electric energy of source side consumes before making up；Power flow on route are as follows: power supply-main switch-load；Power supply-coupling
Transformer-energy storage device；
Step 5: main switch disconnects when main switch breaks down or needs to overhaul, by-pass switch closure makes source side and bears
Side is carried still to keep being connected to；When by-pass switch acts, bidirectional triode thyristor is first acted, and permanent-magnetic switching reoperates；Equal permanent-magnetic switchings are complete
After connection, bidirectional triode thyristor stops working；Power flow on route at this time are as follows: power supply-by-pass switch-load.
Priority Applications (1)
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| CN110198026A (en) * | 2019-04-19 | 2019-09-03 | 中国电力科学研究院有限公司 | A kind of the voltage dip governing system and its control method of impedance isolated form |
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| CN110518592A (en) * | 2019-07-10 | 2019-11-29 | 广州供电局有限公司 | Voltage dip abatement equipment control method for parallel and device |
| CN110518592B (en) * | 2019-07-10 | 2021-03-16 | 广东电网有限责任公司广州供电局 | Parallel control method and device for voltage sag treatment equipment |
| CN110417113A (en) * | 2019-08-02 | 2019-11-05 | 珠海华创泰能能源科技有限公司 | The method that parallel connection type ac uninterrupted power supply and realization do not power off |
| CN113904429A (en) * | 2021-09-14 | 2022-01-07 | 科华数据股份有限公司 | Control circuit of direct-current power supply bypass switch and power supply equipment |
| CN113904429B (en) * | 2021-09-14 | 2022-08-09 | 科华数据股份有限公司 | Control circuit of direct-current power supply bypass switch and power supply equipment |
| CN113852124A (en) * | 2021-09-17 | 2021-12-28 | 中广核太阳能开发有限公司 | Power supply control system and control method based on renewable resources |
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