CN109599887A - Wind-powered electricity generation, photo-voltaic power generation station step-up transformer power-saving method - Google Patents
Wind-powered electricity generation, photo-voltaic power generation station step-up transformer power-saving method Download PDFInfo
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- CN109599887A CN109599887A CN201710924658.5A CN201710924658A CN109599887A CN 109599887 A CN109599887 A CN 109599887A CN 201710924658 A CN201710924658 A CN 201710924658A CN 109599887 A CN109599887 A CN 109599887A
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- transformer
- voltage
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- 230000005611 electricity Effects 0.000 title claims abstract description 11
- 238000010248 power generation Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000007423 decrease Effects 0.000 claims description 2
- 230000002238 attenuated effect Effects 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 230000008092 positive effect Effects 0.000 abstract description 2
- 238000010891 electric arc Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H02J3/383—
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- H02J3/386—
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention provides a kind of wind-powered electricity generation, photo-voltaic power generation station step-up transformer power-saving method, the technical problem to be solved is that: without using breaker by step-up transformer off-grid.The method is characterized in that reducing the expected of switch incision position restores voltage, so that it may by step-up transformer off-grid under the premise of not using breaker.The positive effect of the present invention is the switching surfaces for reducing step-up transformer, embodies wind-powered electricity generation, photo-voltaic power generation station step-up transformer energy-saving efficiency significantly.
Description
Technical field
The invention belongs to field of electrical equipment.
Background technique
When calm, photo-voltaic power generation station cannot generate electricity at night in wind-powered electricity generation power station, and step-up transformer at this time is still
Right hanging net operation generates no-load loss, to avoid these waste of energy, needs to cut off transformer from power grid, if using disconnected
Road device is realized, since high-voltage circuitbreaker cost is high, the economic benefit that economize on electricity generates is counteracted, so in actual production and uncomfortable
With.
To solve this problem, the present invention proposes new solution, does not need to do switching element using high-voltage circuitbreaker,
Energy-saving efficiency after making transformer suspension gives full play to.
Summary of the invention
Transformer is cut off from high-voltage fence, and since incision position voltage is very high, electric arc is difficult to extinguish, so in general needing
Want special breaker.
It can be seen that the voltage of switch fracture is the very corn of a subject, the present invention is solved with reducing (or elimination) fracture voltage
Certainly problem:
Assuming that generating element output is gradually reduced to critical value, inverter output is at this moment adjusted.Detect the output of step-up transformer
Electric current may infer that the voltage of the generation of step-up transformer itself is consistent with network voltage, at this moment by transformation if electric current is zero
Device and power grid disconnect can no electric arc.Not needing breaker can complete to cut-off task.
When transformer is detached from power grid, then inverter closed, since switch fracture has formed stable insulation, is become
Depressor stops working, and does not consume any energy.When generating element, which exports, to be increased, transformer is put into again.
The positive effect of the present invention is the switching surfaces for reducing step-up transformer, makes wind-powered electricity generation, photo-voltaic power generation station boosting transformation
Device energy-saving efficiency significantly embodies.
Specific embodiment
By taking 35KV photovoltaic power generation step-up transformer as an example:
When sunshine gradually decreases, when to the unsuitable critical value for continuing power generation, the output of inverter is adjusted, 35KV liter is made
Pressure transformer high-pressure side output voltage is consistent with network voltage (criterion can also convert from low pressure or high-tension current and obtain), this
When, it is switched to switching and issues disjunction instruction, disconnect the connection of transformer and power grid.
After transformer off-grid, inverter stops output, and step-up transformer is in non-charged state.
To when being suitble to the intensity to generate electricity, reverse operating suspension process is first exported from inverter to transformer illumination restoration
Voltage keeps step-up transformer high side voltage consistent with network voltage, and right Backward handoff switch issues close command, makes transformer
It is connect with power grid, into normal power generation state.
Claims (4)
1. a kind of wind-powered electricity generation, photovoltaic step-up transformer power-saving method, it is characterised in that: when power generation conditions are attenuated to critical value, adjust
Whole step-up transformer output makes it reach unanimity (i.e. expected fracture voltage is smaller) with network voltage, then will by switching switch
Step-up transformer is exited from power grid, after switching stabilization and step-up transformer is isolated with power grid, stops inverter work.
2. according to the method for claim 1, it is characterised in that, step-up transformer output voltage is adjusted, it can be by adjusting
Inverter output voltage or transformer voltage ratio are realized.
3. according to the method for claim 1, it is characterised in that switching switch can not use high-voltage circuitbreaker, using load
Switch, the relatively inexpensive mechanical switch such as disconnecting switch, and switch and be also desirably integrated into transformer tank body, it further decreases
Cost.
4. transformer is generated electricity by way of merging two or more grid systems again when power generation conditions are restored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710924658.5A CN109599887A (en) | 2017-10-01 | 2017-10-01 | Wind-powered electricity generation, photo-voltaic power generation station step-up transformer power-saving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710924658.5A CN109599887A (en) | 2017-10-01 | 2017-10-01 | Wind-powered electricity generation, photo-voltaic power generation station step-up transformer power-saving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109599887A true CN109599887A (en) | 2019-04-09 |
Family
ID=65955861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710924658.5A Withdrawn CN109599887A (en) | 2017-10-01 | 2017-10-01 | Wind-powered electricity generation, photo-voltaic power generation station step-up transformer power-saving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109599887A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013103058A1 (en) * | 2012-01-06 | 2013-07-11 | 株式会社日立産機システム | System linking device |
| CN203415994U (en) * | 2013-07-30 | 2014-01-29 | 阳光电源股份有限公司 | Photovoltaic grid connected inversion system and photovoltaic power generation system equipped therewith |
| US20140078793A1 (en) * | 2012-09-18 | 2014-03-20 | Seshadri Sivakumar | Mitigation of arc flash hazard in photovoltaic power plants |
| CN104242353A (en) * | 2014-10-17 | 2014-12-24 | 阳光电源股份有限公司 | Photovoltaic grid-connected system as well as start control method and start control device |
| CN106159997A (en) * | 2016-07-13 | 2016-11-23 | 上能电气股份有限公司 | The control method of eliminating transformer open circuit loss in a kind of photovoltaic system |
-
2017
- 2017-10-01 CN CN201710924658.5A patent/CN109599887A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013103058A1 (en) * | 2012-01-06 | 2013-07-11 | 株式会社日立産機システム | System linking device |
| US20140078793A1 (en) * | 2012-09-18 | 2014-03-20 | Seshadri Sivakumar | Mitigation of arc flash hazard in photovoltaic power plants |
| CN203415994U (en) * | 2013-07-30 | 2014-01-29 | 阳光电源股份有限公司 | Photovoltaic grid connected inversion system and photovoltaic power generation system equipped therewith |
| CN104242353A (en) * | 2014-10-17 | 2014-12-24 | 阳光电源股份有限公司 | Photovoltaic grid-connected system as well as start control method and start control device |
| CN106159997A (en) * | 2016-07-13 | 2016-11-23 | 上能电气股份有限公司 | The control method of eliminating transformer open circuit loss in a kind of photovoltaic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190409 |
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| WW01 | Invention patent application withdrawn after publication |