CN108667073A - A kind of anti-isolated island method of photovoltaic based on dispatch automated system - Google Patents
A kind of anti-isolated island method of photovoltaic based on dispatch automated system Download PDFInfo
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- CN108667073A CN108667073A CN201810499981.7A CN201810499981A CN108667073A CN 108667073 A CN108667073 A CN 108667073A CN 201810499981 A CN201810499981 A CN 201810499981A CN 108667073 A CN108667073 A CN 108667073A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention provides a kind of anti-isolated island method of the photovoltaic based on dispatch automated system, the access module of major network is incorporated to by special line for photovoltaic plant, electric network model and real time data are obtained from dispatch automated system, photovoltaic plant is switched in major network side access point and models and monitors in real time, photovoltaic isolated island whether is formed using electrical island analysis and power supply point trace mode comprehensive descision, and early warning photovoltaic isolated island situation in time, while the major network access point switch in photovoltaic isolated island is cut off by remote control rapidly.The present invention can have found access power grid and form the photovoltaic plant of island effect in time, and the photovoltaic plant to form island effect can be cut off by dispatch automated system far-end remote control, ensure personnel and equipment safety, realize that convenient, at low cost, reliability is preferable.
Description
Technical field
The present invention relates to dispatching automation technical fields, and in particular to a kind of anti-orphan of photovoltaic based on dispatch automated system
Island method.
Background technology
With the continuous propulsion of new energy construction, a large amount of 10kV distributed photovoltaic power generations system accesses common electrical successively
Net, but it is not included in power supply department power scheduling real time monitoring.The access of distributed photovoltaic power generation system easily causes isolated island to imitate
It answers, so-called island effect, refers to briefly after public electric wire net stops power supply, due to generating electricity by way of merging two or more grid systems there are photovoltaic distributed and be
System and its could not be detached from time with power grid, photovoltaic falls power transmission to power grid, and the part circuit in public electric wire net is caused to be still in band
Electricity condition, to the isolated island of electric power self-sufficiency supply occur.When photovoltaic generates island effect, safety accident is easy tod produce.Therefore, such as
What, which accurately and timely identifies judgement and handles photovoltaic islanding problem, seems particularly significant.
Currently used island detection method can be divided into long-range method, local passive means, local active method three categories, each major class
Again can be there are many distinct methods, medium-long range method can be divided into PLCC methods, SPD methods and SCADA methods etc.；Local passive means can
It is divided into voltage/frequency detection method, voltage harmonic detection method and voltage-phase abrupt climatic change method etc.；Local active method can be divided into impedance
Mensuration, reactance insertion, voltage shift method, power disturbance method, active frequency drift method and sliding formwork frequency drift etc..Above-mentioned side
Method is mainly the isolation realized by the gird-connected inverter of the photovoltaic plant to accessing power grid is monitored to photovoltaic plant.
Dispatch automated system is widely used in power scheduling work at present, and electricity has been established in dispatch automated system
Pessimistic concurrency control has the function of the applied analysis including Network topology and Load flow calculation, can obtain the reality of operation of power networks
When data information, can based on grid equipment connection relation analyze power grid electrical island information, but at present how using scheduling from
Dynamicization system is formed by isolated island to prevent photovoltaic plant to be incorporated to major network, there is not yet research.
Invention content
The purpose of the present invention is：For problems of the prior art, provide a kind of real based on dispatch automated system
The anti-isolated island method of existing photovoltaic, using this method, regulation and control personnel can have found access power grid and form the photovoltaic electric of isolated island in time
It stands, and the photovoltaic plant to form island effect can be cut off by dispatch automated system far-end remote control, ensure personnel and equipment peace
Entirely.
The technical scheme is that：The anti-isolated island method of the photovoltaic based on dispatch automated system of the present invention, based on tune
It spends automated system to implement, include the following steps：
1. establishing photovoltaic plant monitoring model：To each photovoltaic plant in region within the jurisdiction and main distribution net in dispatch automated system
The access point switch of connection is identified, and establishes the correspondence of the access point switch and main distribution pessimistic concurrency control of each photovoltaic plant；
2. obtaining electric network model and real time data information：Dispatch automated system obtains electric network model and operation of power networks counts in real time
It is believed that breath；
3. obtaining the access point switching information of the photovoltaic plant modeled；
4. dispatch automated system is based on equipment connecting relation, is periodically analyzed by topology search according to the time cycle of setting
Form electrical island；
5. dispatch automated system judges that the access point of each photovoltaic plant switchs whether in main electrical island, if so, returning to step
Suddenly 4.；If it is not, then entering step 6.；
6. higher level's power supply point of photovoltaic plant access point switch of the dispatch automated system tracking not in main electrical island：Scheduling is certainly
Dynamicization system is switched according to trend inflow direction and to the principle that voltage levels direction traverses from the photovoltaic plant access point
It sets out, search for upwards step by step and judges whether photovoltaic plant access point switch finally can trace back to 500kV substations, if
It is that then return to step is 4.；If it is not, then entering step 7.；
7. dispatch automated system judges that the access point switchs corresponding photovoltaic plant and forms isolated island, dispatch automated system pop-up
Window alarm is alerted, while pop-up includes the straighforward operation interface for the access point switch for needing to cut off；
8. dispatching and monitoring personnel send access point switch and divide operational order by the straighforward operation interface of dispatch automated system,
Cut-out forms the photovoltaic plant of isolated island.
Further embodiment is：Above-mentioned steps 2. in obtain electric network model information be include circuit, busbar, transformer,
The description information and topological connection relation information of power grid primary equipment including switch, disconnecting link, generator, load；The reality of acquisition
When data information include switch, disconnecting link state and circuit, busbar, transformer, generator, load active and reactive, electric current letter
Breath.
The present invention has the effect of positive：The anti-isolated island method of the photovoltaic based on dispatch automated system of the present invention, carries
Supply a kind of technical concept and technical solution of the anti-photovoltaic island effect different from the prior art, method using the present invention,
Regulation and control personnel can have found the photovoltaic plant of access power grid and formation island effect in time, and can be remote by dispatch automated system
It holds remote-control cut-off to form the photovoltaic plant of island effect, ensures personnel and equipment safety, and the method for the present invention has realization side
Just, at low cost, the reliability advantages such as preferably.
Description of the drawings
Fig. 1 is the method flow schematic diagram of the present invention.
Specific implementation mode
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
（Embodiment 1）
See that Fig. 1, the anti-isolated island method of the photovoltaic based on dispatch automated system of the present embodiment match mainly for by access via telephone line
The design of photovoltaic power station of electric major network pattern, the automation system for the power network dispatching based on power supply department are implemented, and following step is specifically included
Suddenly：
1. establishing photovoltaic plant monitoring model：To each photovoltaic plant in region within the jurisdiction and main distribution net in dispatch automated system
The access point switch of connection is identified, and establishes the correspondence of the access point switch and main distribution pessimistic concurrency control of each photovoltaic plant,
Realize the model mapping of major network line switching and photovoltaic plant.
2. obtaining electric network model and real time data information：Electric network model and power grid fortune are obtained by dispatch automated system
Row real time data information.Electric network model includes that the power grids such as circuit, busbar, transformer, switch, disconnecting link, generator, load are once set
Standby description information and topological connection relation information；Real time data include switch, disconnecting link state and circuit, busbar, transformer,
The active and reactive and current information of generator, load.
3. obtaining the access point switching information of the photovoltaic plant modeled；
4. dispatch automated system is according to the time cycle of setting, the electrical island information of timing analysis power grid.Electrical island was analyzed
Cheng Wei：Using the advanced applied analysis function of dispatch automated system, the equipment connecting relation based on electric network model passes through topology
Searching analysis forms electrical island.The method that dispatch automated system analyzes power grid electrical island is the prior art, is not detailed.
5. dispatch automated system judges that the access point of each photovoltaic plant switchs whether in main electrical island, if so, returning
Return step 4.；If it is not, then entering step 6..
6. higher level's power supply point of photovoltaic plant access point switch of the dispatch automated system tracking not in main electrical island：It adjusts
Automated system is spent according to the principle to trend inflow direction and to voltage levels direction traversal, from the photovoltaic plant access point
Switch sets out, and searches for upwards step by step and judges whether photovoltaic plant access point switch finally can trace back to 500kV substations,
If so, return to step is 4.；If it is not, then entering step 7..
7. dispatch automated system judges that the access point switchs corresponding photovoltaic plant and forms isolated island, dispatch automated system
Pop-up alarm window alarm, while pop-up includes the straighforward operation interface for the access point switch for needing to cut off.
8. dispatching and monitoring personnel are sent switch and divide operational order, cut by the straighforward operation interface of dispatch automated system
The disconnected photovoltaic plant for forming isolated island.
Above example is the explanation rather than limitation of the present invention to the specific implementation mode of the present invention, related technology
The technical staff in field without departing from the spirit and scope of the present invention, can also make various transformation and variation and obtain
To corresponding equivalent technical solution, therefore all equivalent technical solutions should be included into the patent protection model of the present invention
It encloses.
Claims (2)
1. a kind of anti-isolated island method of photovoltaic based on dispatch automated system, it is characterised in that：Based on dispatch automated system reality
It applies, includes the following steps：
1. establishing photovoltaic plant monitoring model：To each photovoltaic plant in region within the jurisdiction and main distribution net in dispatch automated system
The access point switch of connection is identified, and establishes the correspondence of the access point switch and main distribution pessimistic concurrency control of each photovoltaic plant；
2. obtaining electric network model and real time data information：Dispatch automated system obtains electric network model and operation of power networks counts in real time
It is believed that breath；
3. obtaining the access point switching information of the photovoltaic plant modeled；
4. dispatch automated system is based on equipment connecting relation, is periodically analyzed by topology search according to the time cycle of setting
Form electrical island；
5. dispatch automated system judges that the access point of each photovoltaic plant switchs whether in main electrical island, if so, returning to step
Suddenly 4.；If it is not, then entering step 6.；
6. higher level's power supply point of photovoltaic plant access point switch of the dispatch automated system tracking not in main electrical island：Scheduling is certainly
Dynamicization system is switched according to trend inflow direction and to the principle that voltage levels direction traverses from the photovoltaic plant access point
It sets out, search for upwards step by step and judges whether photovoltaic plant access point switch finally can trace back to 500kV substations, if
It is that then return to step is 4.；If it is not, then entering step 7.；
7. dispatch automated system judges that the access point switchs corresponding photovoltaic plant and forms isolated island, dispatch automated system pop-up
Window alarm is alerted, while pop-up includes the straighforward operation interface for the access point switch for needing to cut off；
8. dispatching and monitoring personnel send access point switch and divide operational order by the straighforward operation interface of dispatch automated system,
Cut-out forms the photovoltaic plant of isolated island.
2. the anti-isolated island method of the photovoltaic according to claim 1 based on dispatch automated system, it is characterised in that：The step
The rapid 2. middle electric network model information obtained is the electricity including circuit, busbar, transformer, switch, disconnecting link, generator, load
The description information and topological connection relation information of net primary equipment；The real time data information of acquisition include switch, disconnecting link state with
And active and reactive, the current information of circuit, busbar, transformer, generator, load.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810499981.7A CN108667073A (en) | 2018-05-23 | 2018-05-23 | A kind of anti-isolated island method of photovoltaic based on dispatch automated system |
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| CN201810499981.7A CN108667073A (en) | 2018-05-23 | 2018-05-23 | A kind of anti-isolated island method of photovoltaic based on dispatch automated system |
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| CN108667073A true CN108667073A (en) | 2018-10-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109659975A (en) * | 2018-12-25 | 2019-04-19 | 国电南瑞科技股份有限公司 | Active power distribution network island detection method and system |
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| CN205646842U (en) * | 2016-05-23 | 2016-10-12 | 江苏省电力公司常州供电公司 | 10kV distributing type photovoltaic power generation access device that is incorporated into power networks |
| CN107092992A (en) * | 2017-05-16 | 2017-08-25 | 国家电网公司 | A kind of distributed power source access scheme technology is evaluated and methods of comparison and selection and system |
-
2018
- 2018-05-23 CN CN201810499981.7A patent/CN108667073A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205646842U (en) * | 2016-05-23 | 2016-10-12 | 江苏省电力公司常州供电公司 | 10kV distributing type photovoltaic power generation access device that is incorporated into power networks |
| CN107092992A (en) * | 2017-05-16 | 2017-08-25 | 国家电网公司 | A kind of distributed power source access scheme technology is evaluated and methods of comparison and selection and system |
Non-Patent Citations (1)
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| 潘栋等: ""基于主站运行方式监控的光伏防孤岛技术研究与实现"", 《2017智能电网新技术发展与应用研讨会论文集》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109659975A (en) * | 2018-12-25 | 2019-04-19 | 国电南瑞科技股份有限公司 | Active power distribution network island detection method and system |
| CN109659975B (en) * | 2018-12-25 | 2022-06-14 | 国电南瑞科技股份有限公司 | Island detection method and system for active power distribution network |
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Application publication date: 20181016 |