CN104579165A - Photovoltaic power station dynamic reactive response performance site testing method - Google Patents
Photovoltaic power station dynamic reactive response performance site testing method Download PDFInfo
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- CN104579165A CN104579165A CN201510031603.2A CN201510031603A CN104579165A CN 104579165 A CN104579165 A CN 104579165A CN 201510031603 A CN201510031603 A CN 201510031603A CN 104579165 A CN104579165 A CN 104579165A
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- 238000012360 testing method Methods 0.000 title claims abstract description 45
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- 238000010248 power generation Methods 0.000 claims description 23
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- 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
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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
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Abstract
The invention relates to a photovoltaic power station dynamic reactive response performance site testing method. Test points in the method are selected to be at the positions of photovoltaic power station combining points; voltage changes of buses in a photovoltaic power station are achieved by adjusting a main transformer tap. The method includes the steps of measuring output of active power and reactive power of the photovoltaic power station; confirming a detection device; adjusting an on-load transformer tap to enable the voltage of the combining points to meet the voltage deviation requirement; recording the active power output by the current station with the luminance keeping at 400 watt/square meter to be P0; setting the photovoltaic power station to work in the end voltage control mode; adjusting the on-load transformer tap to observe the reactive motion of the power station; analyzing test results to calculate photovoltaic power station dynamic response performance indexes. The photovoltaic power station dynamic reactive response performance site testing method solves the problems that when photovoltaic power station dynamic reactive response measurement is carried out, the volume of a testing device is limited, and a modeling testing method is too complex are solved, and a photovoltaic power station station-stage reactive response capacity testing method system at present is perfected.
Description
Technical field:
The present invention relates to a kind of on-the-spot test method of photovoltaic plant dynamic reactive response performance, more specifically relate to a kind of on-the-spot test method utilizing station level on-load voltage regulation change and power station AVC system coordination cooperation to carry out photovoltaic plant dynamic reactive response performance.
Background technology:
When comparatively large disturbances appears in photovoltaic electric station grid connection point voltage, voltage magnitude drops to 90%U
n~ 0%U
ntime, photovoltaic DC-to-AC converter needs to have low voltage ride-through capability, and wishes that photovoltaic plant can carry out reactive response rapidly, compensates corresponding reactive current, realizes grid-connected point voltage enabling capabilities.At present, national and foreign standards has all made regulation for the dynamic reactive response during low voltage crossing.Under accidental conditions, due to the impact by solar irradiation strength fluctuation, unsteadiness etc., photovoltaic plant output-power fluctuation is larger.Along with the increase of photovoltaic plant access capacity, the phenomenon that output-power fluctuation causes line voltage distribution to transfinite progressively is aggravated, and wishes that photo-voltaic power generation station possesses the ability of conventional capability regulation voltage, maintain grid-connected press stable.
In photovoltaic plant except concentrating the static passive compensation device that installs additional or dynamic reactive compensation device, photovoltaic DC-to-AC converter also has Reactive-power control ability.Photovoltaic plant powerless control system block diagram as shown in Figure 1, can be divided into idle layer and the idle Distribution Layer adjusted usually.Wherein, upper strata (layer of adjusting) according to and site low-pressure side deviation adaptive setting electrical network to the reactive requirement of photovoltaic plant, and according to the operation constraint of photovoltaic plant, the reactive requirement of adjusting is verified, finally provide rational reactive requirement value, in addition, the reactive power regulating command of dispatching down distributing can also directly be accepted; Lower floor's (Distribution Layer) is according to the operation constraint of photovoltaic generation unit and actual motion state, according to certain distribution principle, the reactive requirement value that upper strata calculates is distributed, after verification, exports the Reactive-power control target instruction target word as photovoltaic generation unit.Therefore plant stand level reactive power compensation configuring condition relative complex, need formulate testing conditions, the detection method of detailed reactive power support ability, the true reactive power support ability of correct response photovoltaic plant.
In GB/T 29321-2012 " photo-voltaic power generation station reactive power compensation technology regulation ", the photovoltaic plant dynamic reactive response time is defined, namely the photo-voltaic power generation station dynamic reactive response time (response timeof PV station dynamic reactive power) refer to photo-voltaic power generation station from grid-connected point voltage is abnormal raise or reduce and reach and trigger set point, until photo-voltaic power generation station the actual exporting change amount of site reactive power (difference of desired value and initial value) reach the time needed for 90% of variable quantity desired value.Fluctuation that photovoltaic exerts oneself responds, fast to meet voltage regulation requirement to require the reactive power source of photo-voltaic power generation station to follow the tracks of.The regulation photo-voltaic power generation station dynamic reactive response time should be not more than 30ms.
The test of dynamic reactive needs the abnormal rising of grid-connected point voltage or reduces as experiment condition, because testing apparatus capacity is much smaller than large-scale photovoltaic plant capacity, testing ground cannot simulating grid large disturbances operating mode, currently generally by power station modeling method, dynamic reactive electric current during low voltage crossing to be assessed, but the method implementation step is complicated, and assessment result precision relies on evaluation and test mechanism technology level.For under accidental conditions, scope range of the fluctuation of voltage is 10%U
nwithin time, need a kind of method of testing simple to operation to the assessment of photo-voltaic power generation station dynamic reactive response performance, the true dynamic reactive enabling capabilities of correct response photovoltaic plant.
Summary of the invention:
The object of this invention is to provide a kind of on-the-spot test method of photovoltaic plant dynamic reactive response performance, when described method solves photovoltaic plant dynamic reactive response measurement, the problem that testing apparatus finite capacity and modeling method of testing are too complicated, perfect current photovoltaic plant station level reactive response aptitude tests method system.
For achieving the above object, the present invention by the following technical solutions: a kind of on-the-spot test method of photovoltaic plant dynamic reactive response performance, described photovoltaic plant comprises reactive power compensator and photovoltaic DC-to-AC converter; Its test point is selected in photovoltaic electric station grid connection point place; In described photovoltaic plant, busbar voltage change realizes by regulating main transformer tap; Said method comprising the steps of:
(1) measure described photovoltaic plant active power to export and reactive power output; Confirm that checkout gear is synchronous with control room;
(2) adjustment has a year transformer tapping, makes grid-connected point voltage should meet the requirement of GB/T 12325 voltage deviation;
(3) record test illumination remains on the current plant active power of output of 400 watts/square metre is P
0;
(4) under setting photovoltaic plant is operated in terminal voltage control mode;
(5) adjustment has a year transformer tapping, observes the idle action in power station;
(6) test terminates, and preserves data;
(7) analytical test result, calculates photovoltaic plant dynamic response performance index.
The on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance provided by the invention, described step (1), by described photovoltaic plant secondary side access power checkout gear, is measured power station active power and is exported and reactive power output.
The on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance provided by the invention, checks that whether the voltage of power quality analyzer and power analyzer, electric current, active power is consistent with Control of Power Plant room with reactive power respectively; Check whether the time of described power detection device keeps synchronous with Control of Power Plant room.
The on-the-spot test method of another preferred a kind of photovoltaic plant dynamic reactive response performance provided by the invention, transformer tapping is adjusted to centre position by described step (2).
The on-the-spot test method of a preferred a kind of photovoltaic plant dynamic reactive response performance more provided by the invention, by by 10kV or 6kV electric pressure access public electric wire net photo-voltaic power generation station, its grid-connected point voltage deviation be corresponding electric power system nominal voltage ± 7%;
By by 35kV ~ 110kV electric pressure access public electric wire net photo-voltaic power generation station, its grid-connected point voltage deviation be corresponding electric power system nominal voltage ?3% ~+7%; After accident recovery voltage be electric power system nominal voltage ± 10%;
By the photo-voltaic power generation station by 220kV electric pressure access public electric wire net, its grid-connected point voltage deviation is 0% ~+10% of corresponding electric power system nominal voltage; After accident recovery voltage be electric power system nominal voltage ?5% ~+10%;
By the photo-voltaic power generation station by 330kV and above access public electric wire net, under normal operating mode, itself and site highest operating voltage must not exceed+110% of electric power system nominal voltage; Minimum operation voltage does not affect electric power system synchronism stability, voltage stabilization, the normal use of station service and the adjustment of next stage voltage.
The on-the-spot test method of another preferred a kind of photovoltaic plant dynamic reactive response performance provided by the invention, in the test in described step (3), does not limit the reactive power pace of change of photo-voltaic power generation station; Guarantee that concentrated reactive power compensator is in normal operating condition, the output reactive power of all photovoltaic DC-to-AC converters is close to 0.
The on-the-spot test method of another preferred a kind of photovoltaic plant dynamic reactive response performance provided by the invention, under described step (4) is operated in terminal voltage control mode by power station AVC default photovoltaic plant, definition action threshold value bound ± U%, i.e. virtual voltage absolute value of the bias | Δ U%|> ± | during U%|, AVC system will carry out voltage-regulation, until | Δ U%|< ± | U%|.During experiment, general setting voltage action threshold value ± U%< (2 ~ 4) × step-length voltage regulating U
tap%.Wherein, step-length voltage regulating U
tap% has to carry the percentage that tapped transformer changes change in voltage after one-level.Reverse maximum reactive power Q is sent after voltage crosses the border
max, suppress voltage fluctuation.
The on-the-spot test method of another preferred a kind of photovoltaic plant dynamic reactive response performance provided by the invention, according to the voltage regulation curve of photovoltaic plant in described step (5), adjustment has carries transformer tapping, raise grid-connected point voltage step by step and disturbance is carried out to electric station grid connection point voltage, after observing the idle action in power station, recover on-load tap-changing transformer tap to testing initial centre position; Reducing grid-connected point voltage step by step and disturbance is carried out to electric station grid connection point voltage, after observing the idle action in power station, recovering tap to testing initial centre position.
The on-the-spot test method of another preferred a kind of photovoltaic plant dynamic reactive response performance provided by the invention, in described step (6), test terminates, recovery voltage tap position, and photovoltaic plant recovers normal operating condition, preserve instrument test data, remove instrument wiring.
The on-the-spot test method of another preferred a kind of photovoltaic plant dynamic reactive response performance provided by the invention, the index in described step (7) comprises: when described photovoltaic plant sends lagging reactive power, dynamic reactive electric current Δ settling time t
1L, dynamic reactive current response time Δ t
2L; When described photovoltaic plant sends capacitive reactive power, dynamic reactive electric current Δ settling time t
1C, dynamic reactive current response time Δ t
2C, lagging reactive power response and capacitive reactive power response
The on-the-spot test method of another preferred a kind of photovoltaic plant dynamic reactive response performance provided by the invention:
Described dynamic reactive electric current Δ settling time t
1Ldetermined by following formula:
Δt
1L＝|t
1L-t
0L| (1)
Wherein, t
1Lfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time; t
0Lfor reactive current arrives steady-state value 90% moment, be designated as response finish time;
Described dynamic reactive electric current Δ settling time t
1Cdetermined by following formula:
Δt
1C＝|t
1C-t
0C| (2)
Wherein, t
1Cfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time; t
0Cfor reactive current arrives steady-state value 90% moment, be designated as response finish time;
Described dynamic reactive current response time Δ t
2Ldetermined by following formula:
Δt
2L＝|t
2L-t
0L| (3)
Wherein, t
2Lfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time;
Described dynamic reactive current response time Δ t
2Cdetermined by following formula:
Δt
2C＝|t
2C-t
0C| (4)
Wherein, t
2Cfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time;
Perception or capacitive reactive power response are the ratio reaching the idle output valve Q in power station and AVC target setting value Qset after stable state.
With immediate prior art ratio, the invention provides technical scheme and there is following excellent effect
1, method of the present invention realizes power station outlet side voltage fluctuation by the tap adjustment and the adjustment of power station AVC response lag utilizing station level on-load voltage regulation change;
2, the dynamic reactive responding ability of reactive power compensation and inverter is concentrated and establishing criteria is evaluated in method of the present invention monitoring power station;
3, when method of the present invention solves photovoltaic plant dynamic reactive response measurement, the problem that testing apparatus finite capacity and modeling method of testing are too complicated;
4, method of the present invention is perfect current photovoltaic plant station level reactive response aptitude tests method system.
Accompanying drawing explanation
Fig. 1 is photovoltaic plant powerless control system block diagram of the present invention;
Fig. 2 is photovoltaic plant dynamic reactive of the present invention test point diagram;
Fig. 3 is photovoltaic plant voltage regulation curve figure of the present invention;
Fig. 4 is reactive power dynamic response determining method schematic diagram of the present invention;
Fig. 5 is certain concentrated access type 30MW voltage, reactive current changing trend diagram of the present invention;
Fig. 6 is certain concentrated access type 30MW voltage, reactive current changing trend diagram of the present invention;
Fig. 7 is certain concentrated access type 30MW active power of the present invention, reactive power response characteristic figure;
Fig. 8 is certain concentrated access type 30MW capacitive dynamic electric voltage, reactive current effective value figure of the present invention.
Embodiment
Below in conjunction with embodiment, the invention will be described in further detail.
Embodiment 1:
As shown in figures 1-8, the invention of this example provides the on-the-spot test method of photovoltaic plant dynamic reactive response performance; Test point should be selected in photovoltaic electric station grid connection point place, and in standing, busbar voltage change realizes by regulating main transformer tap, and range of regulation is ± N level, and step-length voltage regulating is U
tap%.
Method of testing step is as follows
(1) according to accompanying drawing 2, at power station secondary side access power checkout gear, measure power station active power and export and reactive power output; Check that whether the voltage of power quality analyzer and power analyzer, electric current, active power is consistent with Control of Power Plant room with reactive power; Check whether the time of power detection device keeps synchronous with Control of Power Plant room.
(2) adjustment has a year transformer tapping, and transformer tapping is adjusted to centre position, and now grid-connected point voltage should meet the requirement of GB/T 12325 voltage deviation:
by 10 (6) kV electric pressures access public electric wire nets photo-voltaic power generation station, its grid-connected point voltage deviation be corresponding system nominal voltage ± 7%.
by 35kV ~ 110kV electric pressure access public electric wire net photo-voltaic power generation station, its grid-connected point voltage deviation be corresponding system nominal voltage ?3% ~+7%; After accident recovery voltage be nominal voltage of a system ± 10%.
by the photo-voltaic power generation station of 220kV electric pressure access public electric wire net, its grid-connected point voltage deviation is 0% ~+10% of corresponding system nominal voltage; After accident recovery voltage be nominal voltage of a system ?5% ~+10%.
by the photo-voltaic power generation station of 330kV and above access public electric wire net, under normal operating mode, itself and site highest operating voltage must not exceed+110% of nominal voltage of a system; Minimum operation voltage should not affect electric power system synchronism stability, voltage stabilization, the normal use of station service and the adjustment of next stage voltage.
(3) during test, illumination should remain on 400W/m
2above; The current active power of output in record power station is P
0; Do not limit the reactive power pace of change of photo-voltaic power generation station; Guarantee that concentrated reactive power compensator is in normal operating condition, all inverter output reactive powers are close to 0.
(4), under being operated in terminal voltage control mode by power station AVC default photovoltaic plant, voltage operation threshold value is ± U%< (2 ~ 4) × U
tap%, sends reverse maximum reactive power Q after voltage crosses the border
max, suppress voltage fluctuation;
(5) according to voltage curve shown in accompanying drawing 3, regulating to have and carry transformer tapping, raise grid-connected point voltage step by step and disturbance is carried out to electric station grid connection point voltage, after observing the idle action in power station, recovering on-load tap-changing transformer tap to testing initial centre position; Reducing grid-connected point voltage step by step and disturbance is carried out to electric station grid connection point voltage, after observing the idle action in power station, recovering tap to testing initial centre position.
(6) test terminates, recovery voltage tap position, and normal operating condition is recovered in power station, preserves instrument test data, removes instrument wiring.
(7) analytical test result, calculates photovoltaic plant dynamic response performance index: send perceptual idle time, dynamic reactive electric current Δ settling time t
1L, dynamic reactive current response time Δ t
2L; When sending capacitive reactive power, dynamic reactive electric current Δ settling time t
1C, dynamic reactive current response time Δ t
2C, lagging reactive power response, capacitive reactive power response.
Described dynamic reactive electric current Δ settling time t
1Ldetermined by following formula:
Δt
1L＝|t
1L-t
0L| (1)
Wherein, t
1Lfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time; t
0Lfor reactive current arrives steady-state value 90% moment, be designated as response finish time;
Described dynamic reactive electric current Δ settling time t
1Cdetermined by following formula:
Δt
1C＝|t
1C-t
0C| (2)
Wherein, t
1Cfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time; t
0Cfor reactive current arrives steady-state value 90% moment, be designated as response finish time;
Described dynamic reactive current response time Δ t
2Ldetermined by following formula:
Δt
2L＝|t
2L-t
0L| (3)
Wherein, t
2Lfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time;
Described dynamic reactive current response time Δ t
2Cdetermined by following formula:
Δt
2C＝|t
2C-t
0C| (4)
Wherein, t
2Cfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time;
Perception/capacitive reactive power response is for reaching the idle output valve Q in power station and AVC target setting value Q after stable state
setratio.
In Fig. 4, Iq
1for photovoltaic plant reactive current initial launch value; Iq
2for photovoltaic plant reactive current dynamic response amplitude; Iq is photovoltaic plant dynamic reactive current response amplitude;
In order to analyze the impact that different time length distributes on test result, below for certain concentrated access type 30MW dynamic reactive test result.As seen in figs. 5-6, perceptual idle set point is 8Mvar to perception dynamic reactive test result.
Through calculating, perceptual reactive response performance index are as shown in table 1:
Changed power trend in power station after table 1 voltage resume
As shown in Figure 8, perceptual idle set point is 4Mvar to capacitive dynamic reactive test result.Through calculating, capacitive reactive power performance criteria of the response is as shown in table 1:
Changed power trend in power station after table 2 voltage resume
According to the method described in application, this power station dynamic reactive test result is as follows:
When power station sends lagging reactive power, this power station dynamic reactive electric current Δ settling time t1L is 40ms, and dynamic reactive electric current dynamic response time Δ t2L is 1920ms; When power station sends capacitive reactive power, dynamic reactive electric current Δ settling time t1C is 90ms, and dynamic reactive electric current dynamic response time Δ t2C is 2520ms.Lagging reactive power response 93%Q
set, capacitive reactive power response 67.2%Q
set.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; although those of ordinary skill in the field are to be understood that with reference to above-described embodiment: still can modify to the specific embodiment of the present invention or equivalent replacement; these do not depart from any amendment of spirit and scope of the invention or equivalent replacement, are all applying within the claims of the present invention awaited the reply.
Claims (11)
1. an on-the-spot test method for photovoltaic plant dynamic reactive response performance, described photovoltaic plant comprises reactive power compensator and photovoltaic DC-to-AC converter; It is characterized in that: its test point is selected in photovoltaic electric station grid connection point place; In described photovoltaic plant, busbar voltage change realizes by regulating main transformer tap; Said method comprising the steps of:
(1) measure described photovoltaic plant active power to export and reactive power output; Confirm that checkout gear is synchronous with control room;
(2) adjustment has a year transformer tapping, makes grid-connected point voltage should meet the requirement of GB/T 12325 voltage deviation;
(3) record test illumination remains on the current plant active power of output of 400 watts/square metre is P
0;
(4) under setting photovoltaic plant is operated in terminal voltage control mode;
(5) adjustment has a year transformer tapping, observes the idle action in power station;
(6) test terminates, and preserves data;
(7) analytical test result, calculates photovoltaic plant dynamic response performance index.
2. the on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance as claimed in claim 1, it is characterized in that: described step (1), by described photovoltaic plant secondary side access power checkout gear, is measured power station active power and exported and reactive power output.
3. the on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance as claimed in claim 2, is characterized in that: check that whether the voltage of power quality analyzer and power analyzer, electric current, active power is consistent with Control of Power Plant room with reactive power respectively; Check whether the time of described power detection device keeps synchronous with Control of Power Plant room.
4. the on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance as claimed in claim 1, is characterized in that: transformer tapping is adjusted to centre position by described step (2).
5. the on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance as claimed in claim 4,
It is characterized in that: by the photo-voltaic power generation station of 10kV or 6kV electric pressure access public electric wire net, it also
Site voltage deviation be corresponding electric power system nominal voltage ± 7%;
By by 35kV ~ 110kV electric pressure access public electric wire net photo-voltaic power generation station, its grid-connected point voltage deviation be corresponding electric power system nominal voltage ?3% ~+7%; After accident recovery voltage be electric power system nominal voltage ± 10%;
By the photo-voltaic power generation station by 220kV electric pressure access public electric wire net, its grid-connected point voltage deviation is 0% ~+10% of corresponding electric power system nominal voltage; After accident recovery voltage be electric power system nominal voltage ?5% ~+10%;
By the photo-voltaic power generation station by 330kV and above access public electric wire net, under normal operating mode, itself and site highest operating voltage must not exceed+110% of electric power system nominal voltage; Minimum operation voltage does not affect electric power system synchronism stability, voltage stabilization, the normal use of station service and the adjustment of next stage voltage.
6. the on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance as claimed in claim 1, is characterized in that: in the test in described step (3), does not limit the reactive power pace of change of photo-voltaic power generation station; Guarantee that concentrated reactive power compensator is in normal operating condition, the output reactive power of all photovoltaic DC-to-AC converters is close to 0.
7. the on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance as claimed in claim 1, it is characterized in that: under described step (4) is operated in terminal voltage control mode by power station AVC default photovoltaic plant, voltage operation threshold value is ± U%< (2 ~ 4) × step-length voltage regulating U
tap%, sends reverse maximum reactive power Q after voltage crosses the border
max, suppress voltage fluctuation.
8. the on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance as claimed in claim 1, it is characterized in that: according to the voltage regulation curve of photovoltaic plant in described step (5), adjustment has carries transformer tapping, raise grid-connected point voltage step by step and disturbance is carried out to electric station grid connection point voltage, after observing the idle action in power station, recover on-load tap-changing transformer tap to testing initial centre position; Reducing grid-connected point voltage step by step and disturbance is carried out to electric station grid connection point voltage, after observing the idle action in power station, recovering tap to testing initial centre position.
9. the on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance as claimed in claim 1, it is characterized in that: in described step (6), test terminates, recovery voltage tap position, and photovoltaic plant recovers normal operating condition, preserve instrument test data, remove instrument wiring.
10. the on-the-spot test method of a kind of photovoltaic plant dynamic reactive response performance as claimed in claim 1, it is characterized in that: the index in described step (7) comprises: when described photovoltaic plant sends lagging reactive power, dynamic reactive electric current Δ settling time t
1L, dynamic reactive current response time Δ t
2L; When described photovoltaic plant sends capacitive reactive power, dynamic reactive electric current Δ settling time t
1C, dynamic reactive current response time Δ t
2C, lagging reactive power response and capacitive reactive power response.
The on-the-spot test method of 11. a kind of photovoltaic plant dynamic reactive response performances as claimed in claim 10, is characterized in that:
Described dynamic reactive electric current Δ settling time t
1Ldetermined by following formula:
Δt
1L＝|t
1L-t
0L| (1)
Wherein, t
1Lfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time; t
0Lfor reactive current arrives steady-state value 90% moment, be designated as response finish time;
Described dynamic reactive electric current Δ settling time t
1Cdetermined by following formula:
Δt
1C＝|t
1C-t
0C| (2)
Wherein, t
1Cfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time; t
0Cfor reactive current arrives steady-state value 90% moment, be designated as response finish time;
Described dynamic reactive current response time Δ t
2Ldetermined by following formula:
Δt
2L＝|t
2L-t
0L| (3)
Wherein, t
2Lfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time;
Described dynamic reactive current response time Δ t
2Cdetermined by following formula:
Δt
2C＝|t
2C-t
0C| (4)
Wherein, t
2Cfor change in voltage absolute value exceedes adjustment aim value 10% moment, be designated as change in voltage initial time;
Perception or capacitive reactive power response are the ratio reaching the idle output valve Q in power station and AVC target setting value Qset after stable state.
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| CN105356476A (en) * | 2015-11-09 | 2016-02-24 | 中国电力科学研究院 | Photovoltaic power station power testing method based on simulation scheduling |
| CN105445580A (en) * | 2015-11-18 | 2016-03-30 | 中国电力科学研究院 | Test method of reactive power compensation device response time |
| 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 |
| CN105445539B (en) * | 2015-11-24 | 2021-04-30 | 中国电力科学研究院 | Method and system for testing dynamic reactive performance of photovoltaic power station |
| CN105811426A (en) * | 2015-12-24 | 2016-07-27 | 国网甘肃省电力公司电力科学研究院 | Photovoltaic grid connected inverter reactive output control method |
| CN106026166A (en) * | 2016-06-24 | 2016-10-12 | 中国电力科学研究院 | Reactive capacity detection method for new energy power station accessed to weak power grid |
| CN106026166B (en) * | 2016-06-24 | 2021-10-29 | 中国电力科学研究院 | Reactive capacity detection method for new energy power station accessed to weak power grid |
| CN106712041B (en) * | 2016-12-14 | 2019-06-07 | 云南电网有限责任公司电力科学研究院 | 220kV collects the step voltage control method for coordinating up and down of substation |
| CN106712041A (en) * | 2016-12-14 | 2017-05-24 | 云南电网有限责任公司电力科学研究院 | Higher and lower class voltage coordination control method of 220kV collection substation |
| CN110034584A (en) * | 2019-04-30 | 2019-07-19 | 东南大学 | A kind of meter and the idle adaptive reactive voltage control method of abundance photovoltaic plant |
| CN110034584B (en) * | 2019-04-30 | 2022-06-03 | 东南大学溧阳研究院 | Photovoltaic power station self-adaptive reactive voltage control method considering reactive power abundance |
| CN110266012A (en) * | 2019-05-29 | 2019-09-20 | 华电电力科学研究院有限公司 | A kind of photovoltaic plant dynamic reactive response time test method |
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