CN107994865A - A kind of dynamic reactive test device - Google Patents
A kind of dynamic reactive test device Download PDFInfo
- Publication number
- CN107994865A CN107994865A CN201711241420.9A CN201711241420A CN107994865A CN 107994865 A CN107994865 A CN 107994865A CN 201711241420 A CN201711241420 A CN 201711241420A CN 107994865 A CN107994865 A CN 107994865A
- Authority
- CN
- China
- Prior art keywords
- grid
- transformer
- power
- output terminal
- input terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001360 synchronised effect Effects 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 7
- 238000010168 coupling process Methods 0.000 claims description 7
- 238000005859 coupling reaction Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 230000001939 inductive effect Effects 0.000 abstract description 5
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 238000010248 power generation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000003607 modifier Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
-
- 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
Abstract
The present invention discloses a kind of dynamic reactive test device, applied to photovoltaic power station system, including power analyzer and idle test platform, photovoltaic power station system includes grid-connected main breaker, main step-up transformer and photovoltaic plant to be measured, the main step-up transformer and the grid-connected main breaker are connected between tested photovoltaic plant and grid entry point, connecting line connection between the power analyzer and the grid-connected main breaker and the main step-up transformer, the connecting line connection between the idle test platform and the grid-connected main breaker and the main step-up transformer.The present invention relates to technical field of power systems, a kind of dynamic reactive test device, inductive reactive power is sent by idle test platform or capacitive reactive power manufactures photovoltaic electric station grid connection point voltage fluctuation, reactive power using power analyzer monitoring photovoltaic electric station grid connection point changes, realize and dynamic reactive performance is tested in the case of any voltage change, and idle test platform is moved easily, realize in photovoltaic plant on-the-spot test.
Description
Technical field
The present invention relates to technical field of power systems, more particularly to a kind of dynamic reactive test device.
Background technology
Grid entry point is also known as PCC points (Point of Common Coupling), for there is the photo-voltaic power generation station of booster stations, refers to
Booster stations high-voltage side bus or node.
The centralized system that photo-voltaic power generation station is supplied as new energy, in addition to exporting certain active power, output is certain
The reactive power of degree is also essential.The reactive power of photovoltaic plant output is played plays raising in power supply system
The effect of the power factor of power grid, while the loss of photovoltaic plant related transformer and conveying circuit is reduced, power supplying efficiency is improved,
Improve power supply environment.
Photo-voltaic power generation station reactive capability can be by one or more concentration reactive-load compensation realization, also can be by being filled with reactive-load compensation
The photovoltaic DC-to-AC converter put is realized., need to be to collecting mother in photo-voltaic power generation station when carrying out photo-voltaic power generation station dynamic reactive response test
The voltage of line carries out phase step type change, but if photo-voltaic power generation station only configures a set of concentration reactive power compensator or photo-voltaic power generation station
Reactive capability realized by photovoltaic DC-to-AC converter, then can not by station equipment to photo-voltaic power generation station collection bus carry out phase step type disturb
It is dynamic.And traditional low voltage ride through device itself capacity limit and series connection access way due to, can not be to large-scale light
The collection bus of overhead utility produces larger voltage disturbance, therefore does not possess the ability of dynamic reactive response test.
The content of the invention
In order to solve the above-mentioned technical problem, the object of the present invention is to provide a kind of dynamic reactive test device, can test
Dynamic reactive performance in the case of any voltage change.
The technical solution adopted in the present invention is：A kind of dynamic reactive test device, applied to photovoltaic power station system, including
Power analyzer and idle test platform, the photovoltaic power station system include grid-connected main breaker, main step-up transformer and to be measured
Photovoltaic plant, the main step-up transformer and the grid-connected main breaker are connected between tested photovoltaic plant and grid entry point, institute
State the connecting line connection between power analyzer and the grid-connected main breaker and the main step-up transformer, the idle test
Connecting line connection between platform and the grid-connected main breaker and the main step-up transformer.
Further as such scheme is improved, and the idle test platform includes power supply, frequency converter, shaft coupling, exchange
Motor and synchronous motor, the output terminal of the power supply are connected with the input terminal of the frequency converter, the output terminal of the frequency converter with
The input terminal connection of the alternating current generator, the alternating current generator are coupled by shaft coupling with the synchronous motor, the synchronous electricity
Connecting line connection between the output terminal of machine and the grid-connected main breaker and the main step-up transformer.
Further as such scheme is improved, and the idle test platform further includes transformer, the synchronous motor
Output terminal is connected with the input terminal of the transformer, the output terminal of the transformer and the grid-connected main breaker and the main liter
Connecting line connection between pressure transformer.
Further as such scheme is improved, and the power supply includes AC power, and the frequency converter includes AC/DC rectifications
Device, DC/AC inverters and dc bus, the output terminal of the AC power are connected with the input terminal of the AC/DC rectifiers, institute
The output terminal for stating AC/DC rectifiers is connected by the dc bus with the input terminal of the DC/AC inverters, the DC/AC
The output terminal of inverter is connected with the input terminal of the alternating current generator.
Further as such scheme is improved, and the power supply further includes DC power supply, the output terminal of the DC power supply
It is connected with the input terminal of the DC/AC inverters.
Further as such scheme is improved, and the power supply further includes DC power supply and DC/DC current transformers, the direct current
The input terminal connection of DC/DC current transformers described in the output terminal of power supply, the output terminal and the DC/AC of the DC/DC current transformers are inverse
Become the input terminal connection of device.
Further as such scheme is improved, and the DC power supply is storage battery group.
Further as such scheme is improved, and the alternating current generator is synchronous motor or asynchronous machine.
The beneficial effects of the invention are as follows：
A kind of dynamic reactive test device, sends inductive reactive power by idle test platform or capacitive reactive power manufactures photovoltaic electric
Grid entry point of standing voltage fluctuation, the reactive power using power analyzer monitoring photovoltaic electric station grid connection point change, realize in any electricity
Dynamic reactive performance is tested in the case of buckling, and idle test platform is moved easily, it can be achieved that in photovoltaic plant on-the-spot test.
Brief description of the drawings
The embodiment of the present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is a kind of dynamic reactive test device schematic diagram of the present invention；
Fig. 2 is a kind of idle one block diagram of test platform embodiment of the present invention；
Fig. 3 is a kind of idle two block diagram of test platform embodiment of the present invention.
Embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.
Fig. 1 is a kind of dynamic reactive test device schematic diagram of the present invention, and with reference to Fig. 1, a kind of dynamic reactive test device should
For photovoltaic power station system, including power analyzer and idle test platform, photovoltaic power station system includes grid-connected main breaker, master
Step-up transformer and photovoltaic plant to be measured.
Main step-up transformer and grid-connected main breaker are connected between photovoltaic plant to be measured and grid entry point PCC, power analysis
Connecting line connection between instrument and grid-connected main breaker and main step-up transformer, idle test platform and grid-connected main breaker and master
Connecting line connection between step-up transformer.
Fig. 2 is a kind of idle one block diagram of test platform embodiment of the present invention, as shown in Fig. 2, idle test platform includes electricity
Source, frequency converter, shaft coupling, alternating current generator and synchronous motor.In the present embodiment, the output terminal of power supply and the input terminal of frequency converter connect
Connect, the output terminal of frequency converter and the input terminal of alternating current generator connect, and alternating current generator is coupled by shaft coupling with synchronous motor, synchronous
Connecting line connection between the output terminal of motor and grid-connected main breaker and main step-up transformer.In the present embodiment, using exchange
The prime mover of motor as synchronous motor, reduces the grid-connected dash current of synchronous motor, using transducer drive alternating current generator tune
Speed operation, while the output voltage of exciting current control synchronous motor is adjusted, after motor to be synchronized reaches simultaneous interconnecting condition, then
Put into operation of power networks.
It when synchronous motor is run without mechanical load, can be used as phase modifier, adjust network voltage, improve power grid work(
Rate factor.Synchronous motor absorbs a small amount of active power of power grid to supply the energy loss of itself, is sent to network system idle
Power or absorbing reactive power.If ignoring phase modifier own loss, when encouraging excessively, 90 ° of electric current leading voltage, phase modifier is sent out to power grid
Go out inductive reactive power (being absorbed from power grid advanced idle)；When underexcitation, 90 ° of current lagging voltage, phase modifier sends capacitive to power grid
Idle (it is idle to absorb hysteresis from power grid).
In the present embodiment, power supply includes AC power and DC power supply, and frequency converter includes AC/DC rectifiers, DC/AC inversions
Device and dc bus.Wherein, the output terminal of AC power is connected with the input terminal of AC/DC rectifiers, for giving AC/DC rectifiers
Working power is provided, AC power can be power grid or diesel-driven generator.The output terminal of AC/DC rectifiers is by connecting direct current mother
Line is connected with the input terminal of DC/AC inverters, and the output terminal of DC power supply is connected with the input terminal of DC/AC inverters, direct current
The output terminal in source is connected with the input terminal of DC/AC inverters, for giving DC/AC inverters to provide working power, in the present embodiment,
DC power supply is storage battery group.
In the present embodiment, synchronous motor uses the motor that rated capacity is 10kV for 5MVAR, rated voltage, alternating current
The preferred rated power of machine is the permanent magnet synchronous motor of 500kW, it is clear that, alternating current generator can also be other synchronous motors or asynchronous
Motor, for convenience in inverter input incoming transport power supply and DC power supply, the rated voltage of alternating current generator is 380V, is shown
Right, it can also be alternating current generator of 690V etc., to utilize the AC powers such as electricity consumption or diesel-driven generator of standing, or directly connect
Enter the storage battery group that rated voltage is 500V.
Further as above-described embodiment is improved, this is idle, and test platform further includes transformer, the output of synchronous motor
End is connected with the input terminal of transformer, the connecting line between the output terminal of transformer and grid-connected main breaker and main step-up transformer
Connection.In the present embodiment, transformer rated capacity is 5MVAR, rated voltage 10kV/35kV.
Fig. 3 is a kind of idle two block diagram of test platform embodiment of the present invention, as shown in figure 3, idle test platform embodiment
Two difference lies in this is idle, and test platform further includes DC/DC current transformers, direct current with above-mentioned idle test platform embodiment one
The output terminal in source is connected with the input terminal of DC/DC current transformers, the output terminal of DC/DC current transformers and the input terminal of DC/AC inverters
Connection, powers in the output terminal access DC/DC current transformers of DC power supply to alternating current generator so that whole idle test platform selection
When DC power supply is powered, work is more stablized.
Idle test platform, power analyzer are connected to the output terminal of main step-up transformer, grid-connected main breaker is closed
Close, inductive reactive power is sent by idle test platform or capacitive reactive power manufactures photovoltaic electric station grid connection point PCC voltage fluctuations, power
The reactive power change of analyzer monitoring photovoltaic electric station grid connection point PCC, and record the voltage magnitude of grid entry point PCC and export idle
Electric current, carries out dynamic reactive performance test.
When grid-connected main breaker disconnects, run by transducer drive alternating current generator, idle test platform will according to instruction
The corresponding Voltage Drop curve of cyclical fluctuations of output or the voltage rise curve of cyclical fluctuations are asked, power analyzer monitoring grid entry point PCC's is idle
Changed power, and the voltage magnitude and output reactive current of grid entry point PCC are recorded, carry out dynamic reactive performance test.
A kind of dynamic reactive test device, sends inductive reactive power by idle test platform or capacitive reactive power manufactures photovoltaic electric
Grid entry point of standing voltage fluctuation, the reactive power using power analyzer monitoring photovoltaic electric station grid connection point change, realize in any electricity
Dynamic reactive performance is tested in the case of buckling, and idle test platform is moved easily, it can be achieved that in photovoltaic plant on-the-spot test.
Above is the preferable of the present invention is implemented to be illustrated, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalent variations on the premise of without prejudice to spirit of the invention or replace
Change, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (8)
- A kind of 1. dynamic reactive test device, applied to photovoltaic power station system, it is characterised in that it includes power analyzer and nothing Work(test platform, the photovoltaic power station system include grid-connected main breaker, main step-up transformer and photovoltaic plant to be measured, the master Step-up transformer and the grid-connected main breaker are connected between tested photovoltaic plant and grid entry point, the power analyzer and institute State the connecting line connection between grid-connected main breaker and the main step-up transformer, the idle test platform with it is described grid-connected total Connecting line connection between breaker and the main step-up transformer.
- 2. a kind of dynamic reactive test device according to claim 1, it is characterised in that the idle test platform includes Power supply, frequency converter, shaft coupling, alternating current generator and synchronous motor, the output terminal of the power supply and the input terminal of the frequency converter connect Connect, the output terminal of the frequency converter is connected with the input terminal of the alternating current generator, the alternating current generator by shaft coupling with it is described Synchronous motor couples, the company between the output terminal of the synchronous motor and the grid-connected main breaker and the main step-up transformer Wiring connects.
- 3. a kind of dynamic reactive test device according to claim 2, it is characterised in that the idle test platform also wraps Transformer is included, the output terminal of the synchronous motor is connected with the input terminal of the transformer, the output terminal of the transformer and institute State the connecting line connection between grid-connected main breaker and the main step-up transformer.
- 4. a kind of dynamic reactive test device according to claim 3, it is characterised in that the power supply includes alternating current Source, the frequency converter include AC/DC rectifiers, DC/AC inverters and dc bus, the output terminal of the AC power with it is described The input terminal connection of AC/DC rectifiers, the output terminal of the AC/DC rectifiers are inverse by the dc bus and the DC/AC Become the input terminal connection of device, the output terminal of the DC/AC inverters is connected with the input terminal of the alternating current generator.
- 5. a kind of dynamic reactive test device according to claim 4, it is characterised in that the power supply further includes direct current Source, the output terminal of the DC power supply are connected with the input terminal of the DC/AC inverters.
- 6. a kind of dynamic reactive test device according to claim 4, it is characterised in that the power supply further includes direct current Source and DC/DC current transformers, the input terminal connection of DC/DC current transformers described in the output terminal of the DC power supply, the DC/DC unsteady flows The output terminal of device is connected with the input terminal of the DC/AC inverters.
- 7. a kind of dynamic checkout unit according to claim 5 or 6, it is characterised in that the DC power supply is storage battery Group.
- 8. a kind of dynamic reactive test device according to claim 5, it is characterised in that the alternating current generator is synchronous electricity Machine or asynchronous machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711241420.9A CN107994865A (en) | 2017-11-30 | 2017-11-30 | A kind of dynamic reactive test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711241420.9A CN107994865A (en) | 2017-11-30 | 2017-11-30 | A kind of dynamic reactive test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107994865A true CN107994865A (en) | 2018-05-04 |
Family
ID=62034818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711241420.9A Pending CN107994865A (en) | 2017-11-30 | 2017-11-30 | A kind of dynamic reactive test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107994865A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794231A (en) * | 2019-10-25 | 2020-02-14 | 上海电气集团股份有限公司 | High-low voltage ride through test device for wind power pitch system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201430498Y (en) * | 2009-07-07 | 2010-03-24 | 江门市安利电源工程有限公司 | Marine inverter shaft generator |
| CN105445539A (en) * | 2015-11-24 | 2016-03-30 | 中国电力科学研究院 | Photovoltaic power station dynamic wattless performance test method and system |
| CN106291363A (en) * | 2016-09-26 | 2017-01-04 | 武汉承光博德光电科技有限公司 | The new forms of energy grid-connected test device of integration |
| CN206248790U (en) * | 2016-12-05 | 2017-06-13 | 株洲中达特科电子科技有限公司 | A kind of experimental rig that alternating current generator is drawn for urban rail |
-
2017
- 2017-11-30 CN CN201711241420.9A patent/CN107994865A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201430498Y (en) * | 2009-07-07 | 2010-03-24 | 江门市安利电源工程有限公司 | Marine inverter shaft generator |
| CN105445539A (en) * | 2015-11-24 | 2016-03-30 | 中国电力科学研究院 | Photovoltaic power station dynamic wattless performance test method and system |
| CN106291363A (en) * | 2016-09-26 | 2017-01-04 | 武汉承光博德光电科技有限公司 | The new forms of energy grid-connected test device of integration |
| CN206248790U (en) * | 2016-12-05 | 2017-06-13 | 株洲中达特科电子科技有限公司 | A kind of experimental rig that alternating current generator is drawn for urban rail |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794231A (en) * | 2019-10-25 | 2020-02-14 | 上海电气集团股份有限公司 | High-low voltage ride through test device for wind power pitch system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Benysek et al. | Power electronic systems as a crucial part of Smart Grid infrastructure-a survey | |
| CN103023344B (en) | A kind of general intelligent grid power electronic equipment | |
| Jia et al. | Design of hybrid energy storage control system for wind farms based on flow battery and electric double-layer capacitor | |
| CN106451562A (en) | Black-start system and method for wind and light power storage station | |
| CN103208816B (en) | Power collection and transmission system for wind power plant and voltage control method for alternating current generatrix of power collection and transmission system | |
| CN101345423A (en) | 5-power level H-bridge cascade connection back-to-back current transformer used for wind power generation system | |
| CN203027153U (en) | Universal smart power grid power electronic device | |
| Guo et al. | Control of multiple power inverters for more electronics power systems: A review | |
| CN103915856A (en) | Base station grid connected-charging photovoltaic micro-inverter system and control method thereof | |
| CN107623466A (en) | A kind of brake apparatus and braking method for handing over orthogonal traction drive | |
| CN102810870A (en) | Electromagnetic hybrid device and method for synergetic compensation of high-speed railway multi-station electric energy quality | |
| CN202353232U (en) | High-voltage cascaded inverter power unit grid-connection feedback device | |
| CN104319823A (en) | Alternating current and direct current mixed micro power grid comprising Z source converter and coordination control strategy | |
| CN106026122A (en) | Integrated asynchronous excitation phase modifier and reactive compensation and active balance method thereof | |
| CN103259476B (en) | Frequency conversion alternating current generation system control method with voltage harmonic suppression function | |
| CN107645178A (en) | A kind of virtual synchronous machine control system and method based on electric power electric transformer | |
| Ahmadi et al. | Voltage and frequency control in smart distribution systems in presence of DER using flywheel energy storage system | |
| CN105869507B (en) | Megawatt-level hydroelectric generation simulation system | |
| CN102508071A (en) | Rated capacity test method of active front end voltage-type alternating current-direct current-alternating current frequency converter | |
| CN104467004A (en) | Motor test power supply for new energy automobile | |
| CN107046297A (en) | DC series permanent magnetism wind power plant topological structure and its control method | |
| CN103872747A (en) | Uninterrupted 12V direct-current power system | |
| CN203574386U (en) | Multilevel multiport power generation and energy storage hybrid apparatus | |
| CN206517078U (en) | A kind of Thief zone is than cold, heat and electricity triple supply mixed type intelligent micro-grid | |
| Li et al. | Requirement analysis on large-scale renewable energy DC collection and transmission technology |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180504 |
|
| RJ01 | Rejection of invention patent application after publication |