CN104065064A - Control method for a 110 kilovolt transformer substation micro-grid - Google Patents
Control method for a 110 kilovolt transformer substation micro-grid Download PDFInfo
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- CN104065064A CN104065064A CN201410331736.7A CN201410331736A CN104065064A CN 104065064 A CN104065064 A CN 104065064A CN 201410331736 A CN201410331736 A CN 201410331736A CN 104065064 A CN104065064 A CN 104065064A
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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
Abstract
The invention discloses a control method for a 110 kilovolt transformer substation micro-grid. According to the control method, a first station transformer and a second station transformer are involved, under the normal circumstance, the first station transformer supplies power to a first bus and the load of the first bus, and the second station transformer supplies the power to a second bus; when power loss of the first station transformer occurs and the second station transformer is normal, an automatic selector switch connects the load in a station to the second bus; when the first station transformer is normal, and power loss of the second station transformer occurs, a photovoltaic power generation system and a battery energy storage system quit a micro-grid system; when power loss of first station transformer and the second station transformer occurs, the photovoltaic power generation system and the battery energy storage system supply the power to the second bus, and the automatic selector switch connects the load in the station to the second bus. According to the method, the micro-grid distribution condition is controlled, and therefore the micro-grid system can work stably under any circumstance.
Description
Technical field
The present invention relates to a kind of power grid control technology, be specifically related to a kind of 110 kv substation microgrid control methods.
Background technology
Power load constantly increases in recent years, and the drawback of traditional electrical network also shows especially gradually, and this declines the stability of operation of power networks and fail safe, and power supply quality can not get good guarantee.Operation difficulty that the large area blackout several times worldwide occurring has in succession highlighted the centralized generating of electric power system is more large, be difficult to meet the drawbacks such as requirements at the higher level of user to the quality of power supply.For above problem, developed country begins one's study and applies multiple primary energy form in conjunction with, efficient, economic novel electric power technology---distributed power generation (Distributed Generation is called for short DG) technology as Germany, Japan, the U.S. even comprise some developing countries.
Distributed power generation, natural resources as can flexible utilization local in miniature combustion engine, wind power generation, photovoltaic generation etc., reduce environmental pollution, reduce line loss, improve the reliability of power supply, it is the important supplement of centralized single electric power system, efficiently solving large-scale power grid can not load by flexible wire, and local fault causes the problems such as large area disturbance, power failure and remote districts power supply.But distributed generation system is uncontrollable generator unit, generally take the mode of isolation to eliminate its impact on power distribution network, so just greatly reduce the usefulness of distributed power generation, weakened its advantage
[1].In order to solve the grid-connected relevant contradiction of distributed generation system, microgrid arises at the historic moment.
The rise of microgrid concept is mainly the problem solving in the grid-connected technology of bringing of extensive, diversified distributed power source, market and policy, advantage with performance distributed generation technology in economy, the energy and environment, thereby maximize, receive distributed power source, better meet the requirement of power consumer to the quality of power supply and power supply reliability.
Summary of the invention
The invention provides a kind of 110 kv substation microgrid control methods, guarantee 110 kv substation micro-grid system steady operations.
For achieving the above object, the invention provides a kind of 110 kv substation microgrid control methods, in this micro-grid system, comprise first stop power transformation device, circuit is connected to the first bus under power transformation device for first stop, circuit is connected to the station internal loading under the first bus, second station power transformation device, and circuit is connected to the second bus under power transformation device for second station, circuit is connected to photovoltaic generating system and the battery energy storage system under the second bus, and the internal loading of standing connects the second bus by the automatic transfer switch of often opening;
Be characterized in, the method comprises:
First stop is used power transformation device under normal circumstances with power transformation device and second station, and first stop is the first bus and the power supply of lower load thereof with power transformation device, and second station is the second bussed supply with power transformation device;
When for first stop, power transformation device dead electricity, second station use power transformation device normal, automatic transfer switch is connected to the second bus by station internal loading;
First stop is normal with power transformation device, second station is during by power transformation device dead electricity, and photovoltaic generating system and battery energy storage system exit micro-grid system;
First stop is with power transformation device and second station use power transformation device all during dead electricity, and photovoltaic generating system and battery energy storage system are to the second bussed supply, and automatic transfer switch is connected to the second bus by station internal loading.
When for first stop, power transformation device dead electricity, second station use power transformation device normal, the photovoltaic generating system under the second bus and battery energy storage system mode of operation do not adjust, and continue to operate in PQ pattern.
When first stop restores electricity with power transformation device high-pressure side, the internal loading of standing switches back the first bus by automatic transfer switch, and station power use system recovers normal operation mode.
First stop is normal with power transformation device, second station is during by power transformation device dead electricity, if second station is to be caused by its high-voltage side bus dead electricity by power transformation device dead electricity, if 10 kilovolts of actions of autotomying, second station restores electricity with power transformation device high-pressure side, photovoltaic generating system and battery energy storage system put into operation again, and station power use system recovers normal mode of operation.
First stop is normal with power transformation device, second station is during by power transformation device dead electricity, if the supervisory control system of microgrid is pressed and position of the switch combination condition by detecting having of the second bus electric power incoming line switch, judge without electricity, microgrid enters island mode, battery energy storage system switches to V/f pattern by PQ pattern, switched rear main power source and set up, photovoltaic generating system puts into operation, and the internal loading of standing is incorporated to the second bus successively.
When second station restores electricity with power transformation device, microgrid supervisory control system is pressed and position of the switch combination condition by detecting having of the second bus electric power incoming line switch, judged electricity, again the photovoltaic generating system on the second bus and battery energy storage system are exited, switching battery energy storage system is PQ pattern, then photovoltaic generating system and battery energy storage system are dropped into again.
First stop is normal with power transformation device, second station is during by power transformation device dead electricity, microgrid enters island mode, energy accumulation current converter switches to V/f pattern by PQ pattern, having switched rear main power source sets up, the second busbar charging, the internal loading of standing is switched to the second bussed supply by automatic transfer switch, and photovoltaic generating system puts into operation.
First stop is normal with power transformation device, second station is used after power transformation device dead electricity, when the power supply of higher level's power up, for first stop, power transformation device, second station close a floodgate with the high side switch of power transformation device, after transformer has charged, first drop into power transformation device service entrance switch for first stop, the first bus is charged, and the internal loading of standing is by automatic transfer switch switchback the first bus.
The supervisory control system of microgrid detects the second bus electric power incoming line switchyard to be had and presses and position of the switch combination condition by change side, judged electricity, through time delay, the photovoltaic generating system on the second bus and battery energy storage system are exited, the pattern of switching battery energy storage system is PQ pattern, then the second bus electric power incoming line switch closes, photovoltaic generating system and battery energy storage system are all dropped into, now recover normal.
Between the first bus and the second bus, be provided with block switch, when first stop overhauls with change with power transformation device station with power transformation device or second station, the block switch that closes, is with two sections of station electricity consumption buses by a station with becoming, and maintains the normal power supply to load.
Compared to the prior art, its advantage is the present invention's 110 kv substation microgrid control methods, and the present invention controls a microgrid minute situation, guarantees that micro-grid system under any circumstance can steady operation.
Accompanying drawing explanation
Fig. 1 is the module map of the present invention's 110 kv substation microgrid micro-grid systems that control method is used;
Fig. 2 is the schematic diagram of the present invention's 110 kv substation microgrid control methods.
Embodiment
Below in conjunction with accompanying drawing, further illustrate specific embodiments of the invention.
The present invention discloses a kind of 110 kv substation microgrid control methods, guarantees that micro-grid system under any circumstance can steady operation.
As shown in Figure 1, the embodiment of the micro-grid system that the present invention's 110 kv substation microgrid control methods are applicable, in this micro-grid system, comprise power transformation device 1 for first stop, circuit is connected to the first bus 3 under power transformation device for first stop, circuit is connected to the station internal loading 5 under the first bus 3, power transformation device 2 for second station, circuit is connected to the second bus 4 under power transformation device 2 for second station, circuit is connected to photovoltaic generating system 6 and the battery energy storage system 7 under the second bus 4, and the internal loading 5 of standing connects the second bus 4 by the automatic transfer switch 8 of often opening.In photovoltaic generating system 6, comprise the photovoltaic DC-to-AC converter that connects the second bus 4 and the photovoltaic module that connects photovoltaic DC-to-AC converter.Battery energy storage system 7 comprises the energy accumulation current converter that connects the second bus 4, and connects the storage battery of energy accumulation current converter.
As shown in Figure 2, the present invention's 110 kv substation microgrid control methods comprise:
Step 1, when first stop with power transformation device and second station with power transformation device under normal circumstances, station power use system is in normal operation mode, first stop is that the first bus and lower load thereof are powered with power transformation device, second station is the second bussed supply with power transformation device.
Step 2, Real-Time Monitoring also judge first stop power transformation device and the second station operating state of power transformation device, control: if power transformation device dead electricity, second station normally jump to step 3 with power transformation device for first stop according to operating state; If first stop is normal with power transformation device, second station power transformation device dead electricity, jump to step 4; If power transformation device and second station all dead electricity of power transformation device for first stop, jump to step 5.
Step 3, when power transformation device dead electricity for first stop, second station are normal with power transformation device, automatic transfer switch is connected to the second bus by station internal loading.Photovoltaic generating system under the second bus and battery energy storage system mode of operation do not adjust, and continue to operate in PQ pattern.When first stop restores electricity with power transformation device high-pressure side, the internal loading of standing switches back the first bus by automatic transfer switch, and station power use system recovers normal operation mode, jumps to step 1.
Step 4, when first stop is normal with power transformation device, second station is during by power transformation device dead electricity, photovoltaic generating system and battery energy storage system exit micro-grid system because of island protect function.
If second station is to be caused by its high-voltage side bus dead electricity by power transformation device dead electricity, if 10 kilovolts of actions of autotomying, second station restores electricity with power transformation device high-pressure side, and photovoltaic generating system and battery energy storage system put into operation again, station power use system recovers normal mode of operation, jumps to step 1.
If the supervisory control system of microgrid is pressed and position of the switch combination condition by detecting having of the second bus electric power incoming line switch, judge without electricity, microgrid enters island mode, battery energy storage system switches to V/f pattern by PQ pattern, having switched rear main power source sets up, photovoltaic generating system puts into operation, and the internal loading of standing is incorporated to the second bus successively.
When second station restores electricity with power transformation device, microgrid supervisory control system is pressed and position of the switch combination condition by detecting having of the second bus electric power incoming line switch, judged electricity, again the photovoltaic generating system on the second bus and battery energy storage system are exited, switching battery energy storage system is PQ pattern, again photovoltaic generating system and battery energy storage system are dropped into again, jump to step 1.
Step 5, first stop are with power transformation device and second station use power transformation device all during dead electricity, and photovoltaic generating system and battery energy storage system are to the second bussed supply, and automatic transfer switch is connected to the second bus by station internal loading.Micro-electrical network enters island mode, and energy accumulation current converter switches to V/f pattern by PQ pattern, and switched rear main power source and set up, the second busbar charging, the automatic transfer switch of the internal loading of standing is switched to the second bussed supply automatically, and photovoltaic generating system also can put into operation.
When the power supply of higher level's power up, for first stop, power transformation device, second station close a floodgate with the high side switch of power transformation device, after transformer has charged, first drop into power transformation device service entrance switch for first stop, the first bus is charged, and the internal loading of standing is by automatic transfer switch switchback the first bus.
The supervisory control system of microgrid detects the second bus electric power incoming line switchyard to be had and presses and position of the switch combination condition by change side, judged electricity, through time delay, the photovoltaic generating system on the second bus and battery energy storage system are exited, the pattern of switching battery energy storage system is PQ pattern, then the second bus electric power incoming line switch closes, photovoltaic generating system and battery energy storage system are all dropped into, now recover normal, jump to step 1.
The present invention's 110 kv substation microgrid control methods also comprise:
(1) load switching: when microgrid is during in islet operation pattern, first cut away unessential load, comprise electric automobile charging pile, maintenance power supply, socket power, air conditioner power source, fan power, ATS load bus power supply etc., preferentially guarantee the power supply of the important loads such as UPS, direct current cabinet.When photovoltaic DC-to-AC converter and energy accumulation current converter power output have when more than needed, can first access ATS load bus power supply, look again afterwards power supply capacity, select the inputs such as maintenance power supply, electric automobile charging pile, socket power, air conditioner power source, fan power.
Between (2) first buses and the second bus, be provided with block switch, when first stop overhauls with change with power transformation device station with power transformation device or second station, the block switch that closes, is with two sections of station electricity consumption buses by a station with becoming, and maintains the normal power supply to load.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Those skilled in the art, read after foregoing, for multiple modification of the present invention with to substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kv substation microgrid control method, in this micro-grid system, comprise first stop power transformation device, circuit is connected to the first bus under power transformation device for first stop, circuit is connected to the station internal loading under the first bus, second station power transformation device, circuit is connected to the second bus under power transformation device for second station, and circuit is connected to photovoltaic generating system and the battery energy storage system under the second bus, and the internal loading of standing connects the second bus by the automatic transfer switch of often opening;
It is characterized in that, the method comprises:
First stop is used power transformation device under normal circumstances with power transformation device and second station, and first stop is the first bus and the power supply of lower load thereof with power transformation device, and second station is the second bussed supply with power transformation device;
When for first stop, power transformation device dead electricity, second station use power transformation device normal, automatic transfer switch is connected to the second bus by station internal loading;
First stop is normal with power transformation device, second station is during by power transformation device dead electricity, and photovoltaic generating system and battery energy storage system exit micro-grid system;
First stop is with power transformation device and second station use power transformation device all during dead electricity, and photovoltaic generating system and battery energy storage system are to the second bussed supply, and automatic transfer switch is connected to the second bus by station internal loading.
2. 110 kv substation microgrid control methods as claimed in claim 1, it is characterized in that, when for first stop, power transformation device dead electricity, second station use power transformation device normal, the photovoltaic generating system under the second bus and battery energy storage system mode of operation do not adjust, and continue to operate in PQ pattern.
3. 110 kv substation microgrid control methods as claimed in claim 1 or 2, is characterized in that, when first stop restores electricity with power transformation device high-pressure side, the internal loading of standing switches back the first bus by automatic transfer switch, and station power use system recovers normal operation mode.
4. 110 kv substation microgrid control methods as claimed in claim 1, it is characterized in that, first stop is normal with power transformation device, second station is during by power transformation device dead electricity, if second station is to be caused by its high-voltage side bus dead electricity by power transformation device dead electricity, if 10 kilovolts of actions of autotomying, second station restores electricity with power transformation device high-pressure side, and photovoltaic generating system and battery energy storage system put into operation again, and station power use system recovers normal mode of operation.
5. 110 kv substation microgrid control methods as described in claim 1 or 4, it is characterized in that, first stop is normal with power transformation device, second station is during by power transformation device dead electricity, if the supervisory control system of microgrid is pressed and position of the switch combination condition by detecting having of the second bus electric power incoming line switch, judge without electricity, microgrid enters island mode, battery energy storage system switches to V/f pattern by PQ pattern, having switched rear main power source sets up, photovoltaic generating system puts into operation, and the internal loading of standing is incorporated to the second bus successively.
6. 110 kv substation microgrid control methods as claimed in claim 5, it is characterized in that, when second station restores electricity with power transformation device, microgrid supervisory control system is pressed and position of the switch combination condition by detecting having of the second bus electric power incoming line switch, judged electricity, the photovoltaic generating system on the second bus and battery energy storage system are exited, switching battery energy storage system is PQ pattern, then photovoltaic generating system and battery energy storage system are dropped into again again.
7. 110 kv substation microgrid control methods as claimed in claim 1, it is characterized in that, first stop is normal with power transformation device, second station is during by power transformation device dead electricity, microgrid enters island mode, energy accumulation current converter switches to V/f pattern by PQ pattern, has switched rear main power source and has set up, the second busbar charging, the internal loading of standing is switched to the second bussed supply by automatic transfer switch, and photovoltaic generating system puts into operation.
8. 110 kv substation microgrid control methods as described in claim 1 or 7, it is characterized in that, first stop is normal with power transformation device, second station is used after power transformation device dead electricity, when the power supply of higher level's power up, for first stop, power transformation device, second station close a floodgate with the high side switch of power transformation device, after transformer has charged, first drop into power transformation device service entrance switch for first stop, the first bus is charged, and the internal loading of standing is by automatic transfer switch switchback the first bus.
9. 110 kv substation microgrid control methods as described in claim 1 or 7, it is characterized in that, the supervisory control system of microgrid detects the second bus electric power incoming line switchyard to be had and presses and position of the switch combination condition by change side, judged electricity, through time delay, the photovoltaic generating system on the second bus and battery energy storage system are exited, the pattern of switching battery energy storage system is PQ pattern, and the second bus electric power incoming line switch then closes, photovoltaic generating system and battery energy storage system are all dropped into, now recover normal.
10. 110 kv substation microgrid control methods as claimed in claim 1, it is characterized in that, between the first bus and the second bus, be provided with block switch, when first stop overhauls with change with power transformation device station with power transformation device or second station, block switch closes, by a station, with becoming, be with two sections of station electricity consumption buses, maintain the normal power supply to load.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109473988A (en) * | 2018-12-05 | 2019-03-15 | 许继集团有限公司 | Intelligent distribution network power flowcontrol, fault handling method and device containing micro-capacitance sensor |
| CN109494734A (en) * | 2018-12-21 | 2019-03-19 | 国网北京市电力公司 | Method for controlling power supply and device |
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| CN103001254A (en) * | 2012-12-04 | 2013-03-27 | 深圳供电局有限公司 | Alternating current and direct current hybrid micro-grid system |
| CN103872702A (en) * | 2014-03-13 | 2014-06-18 | 中国能源建设集团广东省电力设计研究院 | Main wiring structure of intelligent MG (microgrid) power distribution network |
| CN203674797U (en) * | 2014-01-22 | 2014-06-25 | 上海电力设计院有限公司 | Station power microgrid main wiring system |
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| CN102354974A (en) * | 2011-10-13 | 2012-02-15 | 山东大学 | Micro-grid multi-objective optimized operation control method |
| CN103001254A (en) * | 2012-12-04 | 2013-03-27 | 深圳供电局有限公司 | Alternating current and direct current hybrid micro-grid system |
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| CN109473988A (en) * | 2018-12-05 | 2019-03-15 | 许继集团有限公司 | Intelligent distribution network power flowcontrol, fault handling method and device containing micro-capacitance sensor |
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| CN109494734A (en) * | 2018-12-21 | 2019-03-19 | 国网北京市电力公司 | Method for controlling power supply and device |
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| CN104065064B (en) | 2016-09-21 |
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Effective date of registration: 20200710 Address after: 1 / F, No. 131, No. 251, No. 251, No. 4, No. 28, Lifa Road, Shanghai Patentee after: China Online Shanghai Energy Internet Research Institute Co.,Ltd. Address before: 200002 Nanjing East Road, Shanghai, No. 181, No. Patentee before: STATE GRID SHANGHAI MUNICIPAL ELECTRIC POWER Co. |