CN110224432A - A kind of box-type substation and its microgrid system control method - Google Patents
A kind of box-type substation and its microgrid system control method Download PDFInfo
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- CN110224432A CN110224432A CN201910508596.9A CN201910508596A CN110224432A CN 110224432 A CN110224432 A CN 110224432A CN 201910508596 A CN201910508596 A CN 201910508596A CN 110224432 A CN110224432 A CN 110224432A
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- 238000000034 method Methods 0.000 title claims description 11
- 238000004146 energy storage Methods 0.000 claims abstract description 27
- 238000010248 power generation Methods 0.000 claims description 12
- 230000002269 spontaneous effect Effects 0.000 claims description 11
- 230000009466 transformation Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000001131 transforming effect Effects 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241000283984 Rodentia Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
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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
- H02J3/01—Arrangements for reducing harmonics or ripples
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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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- H02J3/383—
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- H02J3/386—
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Patch Boards (AREA)
Abstract
The invention discloses box-type substation and micro-grid system, the invention belongs to defeated power supply system technical field, when power grid is normal and grid-connected switch is not closed, microgrid bus not it is electric, the high power relay normally-closed contact is closed, and AC load end is directly powered by power grid；When power grid is normal and grid-connected closes the switch, microgrid bus obtains electric, the high power relay automatically switches to normally opened contact closure, and AC load end is switched to by microgrid ac bus and low-voltage distribution cabinet power supply, while microgrid DC bus provides DC power supply for the DC load end；Work as electric network fault, switch disconnects, it is microgrid DC bus continued power by the energy-storage units, and alternating current is provided to the microgrid ac bus by the inversion/rectifier cubicle, the high power relay normally opened contact still remains closed, and load end is still DC bus powered by microgrid ac bus and microgrid.
Description
Technical field
The invention belongs to defeated power supply system technical fields, and in particular to a kind of box-type substation and its microgrid system control side
Method.
Background technique
In the defeated change technology of electric power increasingly developed today, the intermediate node on defeated modified line road frequently with box-type substation technology
Also great development has been obtained, it is how efficient sharp in face of the energy dilemmas and growing energy demand currently faced
With electric energy, increases operation rate and also become important topic, and micro-grid system has flexible, efficient spy in T & D Technology field
Property, design concept is very suitable to be combined between box-type substation to which to form a kind of more efficient applicability better
Box-type substation.
Box-type substation is called prepackage type electric substation or preassembled transformer station.It is a kind of high-tension switch gear, distribution transformer
Device and low-voltage distribution equipment, are lined up that integrated prefabrication is indoor, outdoor close-coupled controller switching equipment by certain connection plan, i.e., will
The functions such as transformer pressure-reducing, low-voltage distribution are organically combined, be mounted on one moisture-proof, antirust, dust-proof, protection against rodents, fire prevention,
Antitheft, heat-insulated, totally-enclosed, moveable steel-structure box is after civil engineering transformer station especially suitable for urban network construction and upgradation
The brand-new substation of one kind of emergence.Box-type substation is suitable for mine, factory and enterprise, oil gas field and wind power station, it is replaced
Become novel complete change power distribution equipment for original civil engineering power distribution room, power distribution station.
Micro-grid system is also known as micro-capacitance sensor (Micro-Grid), can also be translated into microgrid, refers to by distributed generation resource, energy storage dress
It sets, the small-sized electric system of energy conversion device, load, the compositions such as monitoring and protective device.The it is proposed of micro-capacitance sensor is intended to reality
Flexible, the efficient application of existing distributed generation resource, solve the problems, such as that substantial amounts, various informative distributed generation resource are grid-connected.Exploitation and
The extensive access of distributed generation resource and renewable energy can be sufficiently promoted by extending micro-capacitance sensor, be realized to load various energy resources shape
The highly reliable supply of formula is a kind of effective means for realizing active power distribution network, makes traditional power grid to smart grid transition.
Summary of the invention
The box type transformation based on micro-grid system design concept that the purpose of the present invention is to provide a kind of suitable for power grid
It stands and the control method of its micro-grid system.
Box-type substation and its micro-grid system include the switch transformation cabinet being connect by high power relay with power grid bus,
The switch transformation cabinet includes the main circuit breaker being arranged between power grid bus and microgrid ac bus and grid-connected switch, further includes
Several branches being connect by branch breaker with microgrid ac bus；
The normally-closed contact end and normally opened contact end of the high power relay are connected across the upper and lower ends of main circuit breaker, big function respectively
The common end of rate relay connects AC load end by load break switch；
AC transformer is also connected between the grid-connected switch and microgrid ac bus；At least one branch road passes through low
Incoming line cabinet is pressed to connect low-voltage distribution cabinet, the low-voltage distribution cabinet passes through described in the AC load route connection with load break switch
AC load end, while microgrid DC bus is also connected by inversion/rectifier cubicle, it is connected under the microgrid DC bus straight
Current load end and energy-storage units.
A kind of box-type substation of the invention and its microgrid system control method, it is characterised in that:
When power grid bussed supply is normal, it is closed main circuit breaker, the normally-closed contact of high power relay is closed, passes through power grid mother
Line provides high-voltage ac power for AC load end；Meanwhile it being closed grid-connected switch, pass through power grid bus under microgrid ac bus
AC transformer transformation, using low voltage incoming line cabinet flow into low-voltage distribution cabinet, low-voltage distribution cabinet provides low for AC load end
Press AC power source, and low-voltage distribution cabinet by inversion/rectifier cubicle by low-voltage alternating current power supply be converted to DC power supply pass through it is micro-
Net DC bus charges for energy-storage units and provides DC power supply for DC load end；
When power grid bussed supply failure, main circuit breaker is disconnected, the normally opened contact of high power relay is closed；Energy-storage units are logical
It crosses microgrid DC bus and provides DC power supply for DC load end, and energy-storage units pass through inversion/rectifier cubicle for direct current
Source inversion provides AC power source for AC power source and by low-voltage distribution cabinet for AC load end.
Several spontaneous electric equipment units are also connected under the DC bus by microgrid, when power grid bussed supply failure
When, the spontaneous electric equipment unit provides DC power supply to inversion/rectifier cubicle and charges simultaneously for the energy-storage units；Or
The spontaneous electric equipment unit provides DC power supply to inversion/rectifier cubicle together with the energy-storage units.
The spontaneous electric equipment unit includes one of photovoltaic power generation apparatus, wind electricity generating system, tidal power generating device
Or it is a variety of.
Two-way DC/DC charge and discharge electric cabinet is also connected under the microgrid DC bus, the energy-storage units are connected to described double
To under DC/DC charge and discharge electric cabinet.
The coil power supply voltage of the high power relay is 210 ~ 230VAC of exchange, and the contact of high power relay can connect
Logical load is big.
Two-way DC/DC charge and discharge electric cabinet is also connected under the microgrid DC bus, the energy-storage units are connected to described double
To under DC/DC charge and discharge electric cabinet.
The AC transformer is more dual low voltage transformers, i.e., multiple branches arranged side by side are connected after AC transformer.
It include for the photovoltaic power generation apparatus DC bus powered to microgrid in the photovoltaic control cabinet.
Air blower control cabinet is also connected under the microgrid ac bus；Wind power generation plant passes through the air blower control cabinet
End of incoming cables is with microgrid DC bus and/or microgrid ac bus for being electrically connected.
Based on the technical solution of above-mentioned box-type substation, the present invention also provides a kind of micro-grid systems, which is characterized in that above-mentioned
Box-type substation, further include the photovoltaic power generation apparatus, wind power generation plant and energy storage device to connect with the box-type substation.
It is an advantage of the current invention that the power distribution switching apparatus is made of high power relay, it can be achieved that with electric loading
Conversion of the power supply between power grid and microgrid bus, the action response of high power relay is fast, contact load is big, conversion time
More than ten ms grades, guarantee the electrical stability for matching electric loading, avoids confession caused by grade switching time second using automatic change-over
Electricity interrupts.
Further, box-type substation mesolow incoming line cabinet connects with low-voltage alternating-current bus, which is
It is drawn by the transformer case of box-type substation；Therefore the box-type substation can both have been applied straight in the occasion without high pressure access
It connects and the low pressure of access is handled；It can also apply in the occasion for needing high-voltage transforming.In addition, inversion/rectifier cubicle goes out
The DC bus connected equipment that line end is drawn includes DC load, two-way DC/DC charge and discharge electric cabinet, photovoltaic control cabinet and air-blower control
One of cabinet is a variety of, and two-way DC/DC charge and discharge electric cabinet, photovoltaic control cabinet and blower can be selected according to practical matter and flexibly
Control cabinet further improves efficiency to realize the two-way flow of energy.
Box-type substation provided by the invention can also include High-voltage Incoming Cabinet, high-voltage metering cubicle and transformer case, the change
It may be provided with more transformer with split windings in depressor cabinet, and form multiply ac bus, so that the electromagnetism between effectively reducing branch is dry
It disturbs and circulation influences, so that the current harmonics of output is smaller, effectively increase the power quality of output.
Detailed description of the invention
It is of the invention aforementioned and be detailed description below and become more apparent upon when reading in conjunction with the following drawings, in attached drawing:
Fig. 1 is structural schematic diagram of the invention；
In figure:
1, high power relay；2, main circuit breaker；3, grid-connected switch；4, AC transformer；5, AC load end；6, low pressure inlet wire
Cabinet；7, low-voltage distribution cabinet；8, inversion/rectifier cubicle；9, DC load end；10, energy-storage units；11, air blower control cabinet.
Specific embodiment
It is further illustrated below by several specific embodiments and realizes the object of the invention technical solution, need to illustrate
It is that claimed technical solution includes but is not limited to following embodiment.
Embodiment 1
Present embodiment discloses a kind of box-type substation and its microgrid system control method, such as Fig. 1, box-type substation and its microgrid
System includes the switch transformation cabinet being connect by high power relay 1 with power grid bus, and the switch transformation cabinet includes that setting exists
Main circuit breaker 2 and grid-connected switch 3 between power grid bus and microgrid ac bus, further include it is several by branch breaker with it is micro-
The branch of net ac bus connection；The normally-closed contact end and normally opened contact end of the high power relay 1 are connected across main disconnected respectively
The common end of the upper and lower ends of road device 2, high power relay 1 connects AC load end 5 by load break switch；It is described grid-connected
AC transformer 4 is also connected between switch 3 and microgrid ac bus；At least one branch road passes through low voltage incoming line cabinet 6
Low-voltage distribution cabinet 7 is connected, the low-voltage distribution cabinet 7 connects the exchange by the AC load route with load break switch and bears
End 5 is carried, while microgrid DC bus is also connected by inversion/rectifier cubicle 8, it is negative that direct current is connected under the microgrid DC bus
Carry end 9 and energy-storage units 10.
When power grid bussed supply is normal, it is closed main circuit breaker 2, the normally-closed contact of high power relay 1 is closed, is passed through
Power grid bus is that AC load end 5 provides high-voltage ac power；Meanwhile the grid-connected switch 3 of closure, hand over power grid bus by microgrid
It flows 4 transformation of AC transformer under bus, flow into low-voltage distribution cabinet 7 using low voltage incoming line cabinet 6, low-voltage distribution cabinet 7 is exchange
Load end 5 provides low-voltage alternating current power supply, and low-voltage distribution cabinet 7 is converted to low-voltage alternating current power supply by inversion/rectifier cubicle 8
DC power supply is the charging of energy-storage units 10 by microgrid DC bus and is that DC load end 9 provides DC power supply；
When power grid bussed supply failure, main circuit breaker 2 is disconnected, the normally opened contact of high power relay 1 is closed；Energy-storage units
10 provide DC power supply by microgrid DC bus for DC load end 9, and energy-storage units 10 pass through inversion/rectifier cubicle 8
DC power supply inversion is AC power source and is that AC load end 5 provides AC power source by low-voltage distribution cabinet 7.
It is an advantage of the current invention that the power distribution switching apparatus is made of high power relay 1, it can be achieved that with electric loading
Conversion of the power supply between power grid and microgrid bus, the action response of high power relay 1 is fast, contact load is big, when conversion
Between more than ten ms grades, guarantee match electric loading electrical stability, avoid using automatic change-over second grade switching time caused by
Power failure；Further, box-type substation mesolow incoming line cabinet 6 connects with low-voltage alternating-current bus, the low-voltage alternating-current bus
It is to be drawn by the transformer case of box-type substation；Therefore the box-type substation can both apply without high pressure access occasion and
Directly the low pressure of access is handled；It can also apply in the occasion for needing high-voltage transforming.
Embodiment 2
Further, on the basis of 1 technical solution of embodiment, such as Fig. 1, if being also connected under the DC bus by microgrid
Spontaneous electric equipment unit is done, when power grid bussed supply failure, the spontaneous electric equipment unit is provided to inversion/rectifier cubicle 8
DC power supply simultaneously charges simultaneously for the energy-storage units 10；Or the spontaneous electric equipment unit with the energy-storage units 10 together
DC power supply is provided to inversion/rectifier cubicle 8.
The spontaneous electric equipment unit includes one of photovoltaic power generation apparatus, wind electricity generating system, tidal power generating device
Or it is a variety of；Two-way DC/DC charge and discharge electric cabinet is also connected under the microgrid DC bus, the energy-storage units 10 are connected to described double
To under DC/DC charge and discharge electric cabinet.
The coil power supply voltage of the high power relay 1 is 210 ~ 230VAC of exchange, and the contact of high power relay 1 can
The load of connection is big.
Two-way DC/DC charge and discharge electric cabinet, photovoltaic control cabinet and air blower control cabinet 11 are also connected under the microgrid DC bus；
The energy-storage units 10 are connected under the two-way DC/DC charge and discharge electric cabinet.
The AC transformer 4 is more dual low voltage transformers, i.e., multiple branches arranged side by side are connected after AC transformer 4；Institute
State includes for the photovoltaic power generation apparatus DC bus powered to microgrid in photovoltaic control cabinet；Also connect under the microgrid ac bus
It is connected to air blower control cabinet 11；Wind power generation plant by the end of incoming cables of the air blower control cabinet 11 and microgrid DC bus and/or
Microgrid ac bus is for being electrically connected.
Based on the technical solution of above-mentioned box-type substation, the present invention also provides a kind of micro-grid systems, which is characterized in that above-mentioned
Box-type substation, further include the photovoltaic power generation apparatus, wind power generation plant and energy storage device to connect with the box-type substation.
It is an advantage of the current invention that the power distribution switching apparatus is made of high power relay 1, it can be achieved that with electric loading
Conversion of the power supply between power grid and microgrid bus, the action response of high power relay 1 is fast, contact load is big, when conversion
Between more than ten ms grades, guarantee match electric loading electrical stability, avoid using automatic change-over second grade switching time caused by
Power failure.
Further, box-type substation mesolow incoming line cabinet 6 connects with low-voltage alternating-current bus, which is
It is drawn by the transformer case of box-type substation；Therefore the box-type substation can both have been applied straight in the occasion without high pressure access
It connects and the low pressure of access is handled；It can also apply in the occasion for needing high-voltage transforming.In addition, inversion/rectifier cubicle 8 goes out
The DC bus connected equipment that line end is drawn includes DC load, two-way DC/DC charge and discharge electric cabinet, photovoltaic control cabinet and air-blower control
One of cabinet 11 is a variety of, and two-way DC/DC charge and discharge electric cabinet, photovoltaic control cabinet and wind can be selected according to practical matter and flexibly
Machine control cabinet 11 further improves efficiency to realize the two-way flow of energy.
Box-type substation provided by the invention can also include High-voltage Incoming Cabinet, high-voltage metering cubicle and transformer case, the change
It may be provided with more transformer with split windings in depressor cabinet, and form multiply ac bus, so that the electromagnetism between effectively reducing branch is dry
It disturbs and circulation influences, so that the current harmonics of output is smaller, effectively increase the power quality of output.
Claims (4)
1. a kind of box-type substation and its microgrid system control method, it is characterised in that:
It when power grid bussed supply is normal, is closed main circuit breaker (2), the normally-closed contact of high power relay (1) is closed, is passed through
Power grid bus is that AC load end (5) provide high-voltage ac power；Meanwhile the grid-connected switch (3) of closure, pass through power grid bus micro-
AC transformer (4) transformation under net ac bus flows into low-voltage distribution cabinet (7) using low voltage incoming line cabinet (6), low-voltage distribution
Cabinet (7) is that AC load end (5) provide low-voltage alternating current power supply, and low-voltage distribution cabinet (7) will by inversion/rectifier cubicle (8)
Low-voltage alternating current power supply is converted to DC power supply and is energy-storage units (10) charging by microgrid DC bus and is DC load end (9)
DC power supply is provided；
It when power grid bussed supply failure, disconnects main circuit breaker (2), the normally opened contact of high power relay (1) is closed；Energy storage
Unit (10) by microgrid DC bus be DC load end (9) provide DC power supply, and energy-storage units (10) by inversion/
DC power supply inversion is AC power source and is that AC load end (5) provide exchange by low-voltage distribution cabinet (7) by rectifier cubicle (8)
Power supply.
2. a kind of box-type substation as described in claim 1 and its microgrid system control method, it is characterised in that: described to pass through
Several spontaneous electric equipment units, when power grid bussed supply failure, the spontaneous electric equipment are also connected under microgrid DC bus
Unit provides DC power supply to inversion/rectifier cubicle (8) and charges simultaneously for the energy-storage units (10)；Or the self power generation
Equipment unit and the energy-storage units (10) provide DC power supply to inversion/rectifier cubicle (8) together.
3. a kind of box-type substation as claimed in claim 2 and its microgrid system control method, it is characterised in that: described spontaneous
Electric equipment unit includes one of photovoltaic power generation apparatus, wind electricity generating system, tidal power generating device or a variety of.
4. a kind of box-type substation as described in claim 1 and its microgrid system control method, it is characterised in that: the microgrid
Two-way DC/DC charge and discharge electric cabinet is also connected under DC bus, the energy-storage units (10) are connected to the two-way DC/DC charge and discharge
Under cabinet.
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| CN201910508596.9A CN110224432A (en) | 2019-06-13 | 2019-06-13 | A kind of box-type substation and its microgrid system control method |
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| CN201910508596.9A CN110224432A (en) | 2019-06-13 | 2019-06-13 | A kind of box-type substation and its microgrid system control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111987790A (en) * | 2020-08-11 | 2020-11-24 | 云南电网有限责任公司丽江供电局 | Power taking device in ring main unit |
| CN112653140A (en) * | 2020-12-17 | 2021-04-13 | 深圳供电局有限公司 | Power supply control method, device and storage medium |
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| CN111987790B (en) * | 2020-08-11 | 2024-02-20 | 云南电网有限责任公司丽江供电局 | Get electric installation in looped netowrk cabinet |
| CN112653140A (en) * | 2020-12-17 | 2021-04-13 | 深圳供电局有限公司 | Power supply control method, device and storage medium |
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