CN104143834B - A kind of photovoltaic plant low-voltage ride through detection system of high altitude localities - Google Patents
A kind of photovoltaic plant low-voltage ride through detection system of high altitude localities Download PDFInfo
- Publication number
- CN104143834B CN104143834B CN201410359537.7A CN201410359537A CN104143834B CN 104143834 B CN104143834 B CN 104143834B CN 201410359537 A CN201410359537 A CN 201410359537A CN 104143834 B CN104143834 B CN 104143834B
- Authority
- CN
- China
- Prior art keywords
- test
- voltage
- breaker
- circuit breaker
- current
- 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.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 106
- 238000012544 monitoring process Methods 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000004458 analytical method Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 14
- 238000012937 correction Methods 0.000 claims description 12
- 238000009434 installation Methods 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000012300 Sequence Analysis Methods 0.000 claims description 4
- 150000001875 compounds Chemical class 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 6
- 238000002474 experimental method Methods 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 230000032258 transport Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000010223 real-time analysis Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention provides a kind of photovoltaic plant low-voltage ride through detection system of high altitude localities, comprise electrical network, grid side transformer, test cell, photovoltaic side transformer, tested photovoltaic cells and automatic detection and control system, described automatic detection and control system comprises the monitoring modular of monitoring described unit under test, the processing module realizing control module and the analysis detecting data automatically controlled.This Systematical control adopts full-automatic design; the Voltage Drop degree of depth that system inputs according to background test person and simulated failure type; the reactance combination of automatic selection coupling and simulated failure time, regulation tap switch to corresponding position complete reactance coupling, the simulating grid fault type selected, switching single-phase isolating switch position complete electric network fault type matching; complete low voltage crossing detection experiment; hardware protection function and the software protection function of whole system cooperatively interact, and self-diagnosing function is perfect, good stability.
Description
Technical field
The present invention relates to a kind of system of photovoltaic electric station grid connection detection field, be specifically related to a kind of photovoltaic plant low-voltage ride through detection system of high altitude localities.
Background technology
Along with the development of photovoltaic industry, especially in western China, region is wide, sunshine aboundresources, theCourse of PV Industry is swift and violent, and photovoltaic generation proportion in electrical network constantly increases.When grid collapses causes Voltage Drop, if Large Copacity photovoltaic grid-connection power plant does not possess low voltage crossing (LowVoltageRideThrough, LVRT) ability, significant impact will be produced to stability of power system.Therefore, China has successively promulgated national grid enterprise mark Q/GDW617-2011 " photovoltaic plant access electric power network technique regulation ", GB GB/T19964-2012 " photo-voltaic power generation station access power system technology regulation " and industry standard NB/T32005-2013 " photo-voltaic power generation station low voltage crossing detection technique code ".In GB GB/T19964-2012, low voltage crossing curve as shown in Figure 1.Require in standard that high-power photovoltaic synchronization inverter must have low voltage ride-through capability, it is grid-connected must meet corresponding technical standard, only have when grid voltage sags just allows photovoltaic DC-to-AC converter off-grid lower than regulation curve later, simultaneously when voltage is at sunk part, inverter should provide reactive power.
The voltage falling generator detected for photovoltaic plant low voltage crossing at present mainly contains three classes: impedance dividing potential drop form, transformer-type and Technics of Power Electronic Conversion form.The voltage falling generator realized based on impedance dividing potential drop form and transformer-type belongs to passive voltage falling generator, wherein based on impedance partial pressure type scheme reactor to grid side dividing potential drop, carry out control voltage by adjustment reactor parameter and fall the degree of depth, energy realistic simulation electric network fault phenomenon, easily implement in Practical Project, reliability is high; The voltage falling generator that transformer-type realizes, by being with centre tapped transformer to realize, but volume of transformer and weight are very large, are not easy to transport, and technics comparing is complicated simultaneously.In addition, the voltage falling generator realized based on Technics of Power Electronic Conversion form is active voltage drop generator, form is more flexible, powerful, but for high-power photovoltaic synchronization electricity generation system, use power electronic device cost high, control complicated, reliability is not high, and voltage when simultaneously electric network fault resisted by device itself, rush of current are limited in one's ability.
In prior art, be applied to high altitude localities photovoltaic electric station grid connection detection mobile device and all use Technics of Power Electronic Conversion mode, mobile detection apparatus based on impedance manner is not applied in high altitude localities, is only used in low altitude area, and needs in test process manually to change wiring.
Low voltage ride through of photovoltaic inverter detection system is utilized to mainly contain following three classes: traditional high altitude localities portable photovoltaic plant low voltage crossing checkout gear; Plain type portable photovoltaic plant low voltage crossing checkout gear; Fixed type photovoltaic inverter low-voltage ride through detection system.Mainly there is following characteristics:
(1) traditional high altitude localities portable photovoltaic plant low voltage crossing checkout gear, all adopt Technics of Power Electronic Conversion form, for Large Copacity photo-voltaic power generation station, power electronic device cost is high, control complicated, reliability is not high, and voltage when simultaneously electric network fault resisted by device itself, rush of current are limited in one's ability.And explicitly called for checkout gear generally to adopt passive reactance device ground short circuit or phase fault to carry out simulating grid fault in NB/T32005-2013 " photo-voltaic power generation station low voltage crossing detection technique code ".
(2) plain type portable photovoltaic plant low voltage crossing checkout gear, general employing passive reactance dividing potential drop form, but owing to limiting by installation space, checkout gear cannot configure a lot of reactor, maybe cannot be configured for the switch etc. changing reactor tap wiring, general employing manually changes the reactor parameter that reactor tap wiring changes major loop.Manual change fault point wiring carrys out simulating grid fault, complex steps, and length consuming time has certain potential safety hazard.No matter be manual modification reactance parameter or manual modification simulating grid failure mode, all need that tested photovoltaic DC-to-AC converter is out of service just can be operated afterwards, add extra detection time, be unfavorable for the raising of whole detection efficiency.In addition, the portable photovoltaic plant low voltage crossing checkout gear lectotype selection of plain type or installation cannot meet the requirement of High aititude electric insulation.
(3) fixed type photovoltaic inverter low-voltage ride through detection system, because not limiting by installing space, multiple reactor can be adopted to combine, by installing multiple switch or on-load voltage regulating switch adjusts major loop reactance parameter, and realize simulating grid fault type by multiple switch combination mode and switch, but whole system cost is very high, floor space is larger, equipment is installed on fixed location, cannot move, and is not suitable for photovoltaic plant and detects.
Therefore, need to provide a kind of mobile detecting system being applicable to high altitude localities photovoltaic plant low voltage ride-through capability test.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the invention provides a kind of photovoltaic plant low-voltage ride through detection system of high altitude localities.
In order to realize foregoing invention object, the present invention takes following technical scheme:
A kind of photovoltaic plant low-voltage ride through detection system of high altitude localities, described photovoltaic plant low-voltage ride through detection system comprises electrical network, grid side transformer, test cell, photovoltaic side transformer, tested photovoltaic cells and automatic detection and control system, and its improvements are:
Described test cell comprises the lead-in circuit breaker, current limiting circuit breaker, current-limiting reactor and the wire-outgoing breaker that connect successively, described lead-in circuit breaker, current limiting circuit breaker, current-limiting reactor and wire-outgoing breaker bypass breaker in parallel;
The short-circuit reactance of series connection, circuit breaker, the switches set of three single-phase contactor parallel connections and single-phase contactor is connected, described single-phase contactor ground connection between described current-limiting reactor and described wire-outgoing breaker; Described current-limiting reactor is connected by multiselect shunting switch with the other end of described short-circuit reactance;
Described lead-in circuit breaker, described bypass breaker, described wire-outgoing breaker and described circuit breaker are respectively equipped with current transformer;
35KV voltage transformer one accesses between described lead-in circuit breaker and described grid side transformer; 35KV voltage transformer two and 10KV voltage transformer one access between described wire-outgoing breaker and described photovoltaic side transformer respectively by isolating switch;
Described automatic detection and control system comprises the monitoring modular of monitoring described unit under test, the processing module realizing control module and the analysis detecting data automatically controlled.
Further, described monitoring modular obtains the information of described current transformer, the information of described voltage transformer, deciliter state of the state information of described circuit breaker and the signal of telecommunication, described switches set and single-phase contactor, the switch position of described multiselect shunting switch and the state information of described isolating switch;
Described state information comprises opening and closing state, operating mechanism information, warning information and accident information;
The described signal of telecommunication comprises three-phase voltage, three-phase current, power, power factor and frequency.
Further, described control module control described circuit breaker deciliter, described isolating switch deciliter, the lifting shelves of described multiselect shunting switch, the degree of depth is fallen in test, mode is fallen in test, the switches set of test drop-out time and described three single-phase contactor parallel connections and single-phase contactor deciliter.
Further, the control method of described control module comprises the following steps:
I, closed described lead-in circuit breaker and described bypass breaker, drop into automatic detection and control system;
What II, described automatic monitoring system acceptance backstage issued falls degree of depth instruction, follows according to reactance inductance value coupling matrix, and the combination of screening reactance inductance value, controls the file location of described multiselect shunting switch, completes the reactance inductance value coupling that the degree of depth is fallen in test;
III, described automatic monitoring system follow the test sent according to backstage to fall mode, select and control the described switches set of three single-phase contactor parallel connections and the compound mode of single-phase contactor, completing the switching of electric network fault mode;
VI, closed current limiting circuit breaker and wire-outgoing breaker, start to carry out low electricity and pass through pressure detection;
V, disconnection bypass breaker, closed circuit breaker, starts Voltage Drop;
VI, after described test drop-out time, again disconnect circuit breaker, end voltage is fallen;
VII, closed bypass breaker, disconnect current limiting circuit breaker and wire-outgoing breaker, terminate test.
Further, described processing module comprises the module realizing respectively gathering recorder data, resolving correction data and generation examining report.
Further, the module of described collection recorded broadcast data is included in the high accuracy oscillograph of described current limiting reactor and the installation of described outlet short switch place;
Three-phase voltage when described high accuracy oscillograph record is tested and three-phase current is triggered, by recorded transfer of data to the module of resolving correction data before low voltage crossing on-test.
Further, the module of described parsing correction data receives the Wave data of high accuracy oscillograph, obtains test and falls the degree of depth, fault type, test duration, test number (TN);
By all-wave difference fourier algorithm and sequence analysis method, data transaction is become voltage, current waveform, obtain experimental test number;
The module of described parsing correction data, according to the low degree of depth of the voltage of background transfer, calculates drop-out time and the theoretical test data falling spoke value, experimental test data and described theoretical test data is contrasted, judge test result.
Further, the module of described generation examining report generates single test report according to test condition, test waveform, result of the test, testing time;
Single test report and test result are integrated, obtains test report.
Compared with prior art, beneficial effect of the present invention is:
1, the Voltage Drop amplitude that system of the present invention is meticulous controls; Amplitude of falling covers 0 ~ 90%Un scope, falls a little, Voltage Drop precision≤± 2%Un at interval of being distributed with in 5%Un.
2, system 10/35kV electric pressure independent design of the present invention, system is simple, uses flexibly, reliability is high, is convenient to safeguard.
3, Systematical control of the present invention adopts full-automatic design, the Voltage Drop degree of depth that system inputs according to background test person and simulated failure type, the reactance combination of automatic selection coupling and simulated failure time, automatic regulation tap switch to corresponding position completes reactance coupling, according to the simulating grid fault type selected, automatic switching single-phase isolating switch position completes electric network fault type matching, automatically low voltage crossing detection experiment is completed according to testing process, in whole test process, device responds speed is fast, do not need manually to change wiring, operating equipment, artificial incorrect operation can not be produced, hardware protection function and the software protection function of whole system cooperatively interact, self-diagnosing function is perfect, good stability.
4, system of the present invention adopts intelligent analysis test result, and system gathers automatically, preserve detecting information, and real-time analysis test result, generate test report; Acquisition precision is high, backstage man-machine interface friendly, real-time update, simple to operation.
Accompanying drawing explanation
Fig. 1 is the low voltage crossing curve synoptic diagram that GB/T19964-2012 specifies;
Fig. 2 is portable photovoltaic plant low-voltage ride through detection system figure in the present invention;
Fig. 3 is portable photovoltaic plant low voltage crossing checkout gear primary system figure in the present embodiment;
Fig. 4 is multiselect shunting switch schematic diagram in the present invention;
Fig. 5 is Aulomatizeted Detect control system and portable photovoltaic plant low-voltage ride through detection system connection diagram in the present invention;
Fig. 6 is Aulomatizeted Detect control system flow chart in the present invention;
Fig. 7 is each device layout figure in breaker in middle cabinet container of the present invention;
Fig. 8 is each device layout figure in reactor container in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 2, Fig. 2 is portable photovoltaic plant low-voltage ride through detection system figure in the present invention; The photovoltaic plant low-voltage ride through detection system of high altitude localities of the present invention comprises electrical network, grid side transformer, test cell, photovoltaic side transformer, tested photovoltaic cells and automatic detection and control system.
Described test cell comprises the lead-in circuit breaker, current limiting circuit breaker, current-limiting reactor and the wire-outgoing breaker that connect successively, described lead-in circuit breaker, current limiting circuit breaker, current-limiting reactor and wire-outgoing breaker bypass breaker in parallel.
The short-circuit reactance of series connection, circuit breaker, the switches set of three single-phase contactor parallel connections and single-phase contactor is connected, described single-phase contactor ground connection between described current-limiting reactor and described wire-outgoing breaker; Described current-limiting reactor is connected by multiselect shunting switch with the other end of described short-circuit reactance.
Described lead-in circuit breaker, described bypass breaker, described wire-outgoing breaker and described circuit breaker are respectively equipped with current transformer.
35KV voltage transformer one accesses between described lead-in circuit breaker and described grid side transformer; 35KV voltage transformer two and 10KV voltage transformer one access between described wire-outgoing breaker and described photovoltaic side transformer respectively by isolating switch.
As shown in Figure 5,6, Fig. 5,6 is respectively Aulomatizeted Detect control system and portable photovoltaic plant low-voltage ride through detection system connection diagram and Aulomatizeted Detect control flow chart in the present invention.Described automatic detection and control system comprises the monitoring modular of monitoring described unit under test, the processing module realizing control module and the analysis detecting data automatically controlled.
Monitoring modular obtains switch cubicle container environment humiture, reactor container environment humiture, the information of current transformer, the information of voltage transformer, the state information of circuit breaker (comprises opening and closing state, operating mechanism information, relevant alarm and accident information) and the signal of telecommunication (comprise three-phase voltage, electric current, power, power factor, frequency), deciliter state of switches set and single-phase contactor, the switch position of described multiselect shunting switch and the state information of described isolating switch, reactor temperature, the state information of 10kV/35kVPT isolating switch.
Above-mentioned circuit-breaker switching on-off information comprises: circuit breaker close bit per minute position, disconnecting link close bit per minute position, cutter close bit per minute position; Operating mechanism information comprises: spring energy-storage instruction, the instruction of breaker chamber low pressure, the instruction of SF6 gas density; Warning information comprises: spring unstored energy alarm, control loop template alarm, low pressure alarm, power supply power-fail alarm etc.; Accident information comprises: fault trip accident is total, three station controller faults, density monitor fault, low pressure fault etc.
Control module control described circuit breaker deciliter, described isolating switch deciliter, the lifting shelves of described multiselect shunting switch, the degree of depth is fallen in the test of test start/stop, mode is fallen in test, the test setting of drop-out time and the switches set of described three single-phase contactor parallel connections and single-phase contactor deciliter.
The control method of control module comprises the following steps:
I, closed described lead-in circuit breaker and described bypass breaker, drop into automatic detection and control system;
II, complete fall the degree of depth reactance inductance value coupling;
What automatic monitoring system acceptance background test personnel issued falls degree of depth instruction, follow according to reactance inductance value coupling matrix, the position that reactance inductance value combines and each gear of multiselect shunting switch is corresponding that screening is corresponding, to each equipment transmitting order to lower levels, control each gear of multiselect shunting switch and be adjusted to correspondence position, complete the inductance Matching and modification that the degree of depth is fallen in this test, and corresponding information is returned background test person station of feeding, whole process full-automation completes, without the need to manually carrying out change wiring.
III, switching electric network fault mode;
Automatic testing and control system follows and falls mode according to consistency operation personnel selection, the single-phase contactor of automatic selection correspondence runs compound mode, the switches set of the single-phase contactor parallel connection of Long-distance Control three and single-phase contactor K1, K2, K3 and K4 deciliter, and corresponding information is fed back to background test person station, overall process completes automatically, without the need to manually carrying out change wiring, the security reliability of strengthen test, greatly improves detection efficiency.
IV, closed current limiting circuit breaker DL3 and wire-outgoing breaker DL4, start to carry out low electricity and pass through pressure detection;
V, disconnection bypass breaker DL2, closed circuit breaker DL5, starts Voltage Drop;
VI, after described test drop-out time, again disconnect circuit breaker DL5, end voltage is fallen;
VII, closed bypass breaker DL2, disconnect current limiting circuit breaker DL3 and wire-outgoing breaker DL4, terminate this LVRT and test, and changes test request and carry out another single test;
VII, total Test terminate, and DL1, DL2, DL3, DL4, DL5 all disconnect, and automatic test control system exits.
In Step II, complete and fall degree of depth reactance inductance value coupling.Concrete steps are as follows:
In this enforcement, realize each reactance fallen a little by the tap combination of many taps reactor and combine, amplitude of falling covers 0 ~ 90%Un scope, falls a little, Voltage Drop precision≤± 2%Un at interval of being distributed with in 5%Un.
35kV and 10kV system respectively configures one group of reactor.Fall based on reactance dividing potential drop analog voltage, according to reactance dividing potential drop relation, detection system output voltage (i.e. Voltage Drop amplitude) can be obtained
Wherein, Xs is electrical network reactance, and Xsr is current-limiting reactor, and Xsc is short-circuit reactance, and Un is line voltage.
Reactor adopts many tap setting, wherein current limiting reactor Xsr adopts 4 tap setting (hereinafter referred to as Reactor banks L1), short-circuit reactance device Xsc adopts 5 tap setting (hereinafter referred to as Reactor banks L2), each tap inductance value is different, each tap group meets amplitude of falling altogether and covers 0 ~ 90%Un scope, falls an inductance value coupling at interval of being distributed with in 5%Un.
In the present embodiment, the detection of 35kV power station detects from 10kV power station and uses different Reactor banks, and be installed in 35kV reactor container and 10kV reactor container respectively, the total inductance value of 35kV Reactor banks L1 is the total inductance value of 200mH, L2 is 480mH; The total inductance value of 10kV Reactor banks L1 is the total inductance value of 30mH, L2 is 75mH.
The each tap inductance value of Reactor banks fits through the gear controlling multiselect shunting switch and realizes.Multiselect shunting switch is off circuit tap changer, and point S1, S2, S3 tri-parts of transferring the files, S1, S2, S3 can independently control to transfer the files respectively, and wherein S1, S3 respectively have 4 gears, and S2 has 2 gears, and multiselect shunting switch as shown in Figure 4.
Each tap of multiselect shunting switch S1, S2 difference linked reactor group L1 and L2, be used for selecting corresponding reactor tap, S3 is used for switching the tie point of reactor and switch cubicle CB1 and CB3, change the access direction of Reactor banks L1 and L2 access testing system, thus increase the option of the inductance value coupling of current-limiting reactor and short-circuit reactance.
As shown in Figure 3, 0 of Reactor banks L1, 1, 2, 3 are connected to 0 of multiselect shunting switch with cable respectively, 1, 2, 3 grades, 1 of Reactor banks L2, 2, 3, 4 grades connect 0 of multiselect shunting switch S2 respectively, 1, 2, 3 grades, the reactance of 0 to 1 section of L2 is fixing access, the switch cubicle DL3 port of export is connected to 0 file location of multiselect shunting switch, the switch cubicle DL5 port of export is connected to 1 file location of multiselect shunting switch, S1, S2, S3 gear combination in any can be combined into 32 kinds of combinations, get wherein efficient combination 25 kinds, inductance value combined covering falls 0 ~ 90%Un scope of amplitude, and fall a little at interval of being distributed with in 5%Un.
In this enforcement, the photovoltaic plant low voltage crossing that system of the present invention is specially adapted to high hypo area detects; Wherein, the overall fixed support of multiselect shunting switch supports, each stube cable is fixed on supporting bracket, cable connector installs shrink cable termination, each electric connecting point minimum spacing is greater than 410mm, electric insulation meets GB/T14597-2010 " the climatic environment condition of electric product Different Altitude " height above sea level 4000 meters and revises requirement, the fixing requirement also meeting the vehicle-mounted transport standards such as GB4798.2-2008-T " transport of electric and electronic product applied environment condition part 2 " of installation of equipment.
In Step II I, switch electric network fault mode; Concrete steps are as follows:
In the present invention, 4 single-phase contactor combination in any modes are adopted to realize electrical network symmetry and unbalanced fault simulation.As shown in Figure 2, K1, K2, K3 end of incoming cables connects respectively by cable falls short-circuiting device DL5 outlet A phase, B phase and C phase, K1, K2, the outlet of K3 connects with copper bar and is connected to the end of incoming cables of K4, the K4 port of export is connected to container wall earth point, each contactor independently can be controlled by control system, during test, the operational mode combining each contactor is required according to the mode of falling, and by Aulomatizeted Detect control system control each contactor deciliter, realize symmetry and the unbalanced fault of simulating grid fault, according to the requirement of low voltage crossing detection of grid fault type, shown in each single-phase contactor compound mode following table 1 electric network fault type combination table.
| Electric network fault type | Deciliter combination of single-phase contactor position |
| A phase ground connection | K1 and K4 closes, K2 and K3 disconnects |
| B phase ground connection | K2 and K4 closes, K1 and K3 disconnects |
| C phase ground connection | K3 and K4 closes, K1 and K2 disconnects |
| The short circuit of AB phase | K1 and K2 closes, K3 and K4 disconnects |
| The short circuit of BC phase | K2 and K3 closes, K1 and K4 disconnects |
| The short circuit of CA phase | K1 and K3 closes, K2 and K4 disconnects |
| The short circuit of ABC phase | K1, K2, K3 are closed, and K4 disconnects |
Table 1
Processing module comprises the module realizing respectively gathering recorder data, resolving correction data and generation examining report.
The module gathering recorded broadcast data is included in the high accuracy oscillograph of described current limiting reactor and the installation of described outlet short switch place; Three-phase voltage when described high accuracy oscillograph record is tested and three-phase current is triggered, by recorded transfer of data to the module of resolving correction data before low voltage crossing on-test.
The module of resolving correction data receives the Wave data of high accuracy oscillograph, obtains test and falls the degree of depth, fault type, test duration, test number (TN); By all-wave difference fourier algorithm and sequence analysis method, data transaction is become voltage, current waveform, obtain experimental test number; The module of described parsing correction data, according to the low degree of depth of the voltage of background transfer, calculates drop-out time and the theoretical test data falling spoke value, experimental test data and described theoretical test data is contrasted, judge test result.
The module generating examining report generates single test report according to test condition, test waveform, result of the test, testing time; Single test report and test result are integrated, obtains test report.
During testing inspection, stood by backstage detection person and start high accuracy oscillograph, high accuracy oscillograph acquisition testing systems axiol-ogy point three-phase voltage and three-phase current data, and be transferred to processing module and name by specific naming rule, store with comtrade form in the present embodiment, by processing module, Wave data is resolved, concrete voltage is converted to by all-wave difference fourier algorithm and sequence analysis method, current waveform, drop-out time is calculated according to the stand low voltage crossing opisometer that specifies by GB/T19964-2012 of the low degree of depth of voltage of transmission of backstage detection person, fall spoke value, and the wave analysis Comparative result of enrolling with reality, judge that whether this result of the test is qualified.By the data name stored to after whole group of Data Analysis, generate examining report and export printing.
As shown in Figure 7,8, Fig. 7,8 is respectively each device layout figure in switch cubicle container and reactor container.System of the present invention adopts the structure of vehicle-mounted container, and the complete sets of equipment adopt highly integrated design to concentrate in 3 containers, and Container Dimensions is 9.6 meters * 2.7 meters * 3 meters.Three containers are respectively that 10kV falls volta box, 35kV falls volta box and switch cubicle container.
1) switch cubicle container, 35kVSF6 high-tension switch cabinet 6 shields, 2 groups of 35kVPT, 1 group of 10kVPT, 1 cable drum, high-tension cable, T-shaped joint of cable, complex protection device, centralized control cabinet, isolating transformer, air-conditioning and testing station etc.
2) 35kV falls bleeder mechanism container, and 35kV reactor is a set of, supporting 35kV shunting switch, stube cable, cable turntable, T-shaped joint of cable, heater, temperature and humidity controller, radiator fan etc.;
3) 10kV falls bleeder mechanism container, and 10kV reactor is a set of, supporting 10kV shunting switch, stube cable, cable turntable, T-shaped joint of cable, heater, temperature and humidity controller, radiator fan etc.
The improvement and design of every container, device layout, installation have taken into full account height above sea level 4000 meters, 35kV electric pressure electric insulation, and comprise the environment vehicle-mounted transports such as Gobi desert, hills, desert at low-grade highway.Container adopts full-closed structure, casing chassis uses the stable framework based on automobile chassis, platform floor adopts 3mm checkered steel plate, and tank wall surrounding lifting bolt is fixed, and lifting bolt requires metal and rubber gasket, so that fastening rear rainproof, overall consideration waterproof design, arranges at correct position and leads rain groove, prevents rainwater from infiltrating internal container, anticorrosion, oil-stain-preventing process are carried out in envelope internal material surface, and maintenance channel takes non-skid feature.
In case, each equipment takes into full account vehicle-mounted mobile characteristic, meets the forward action power of the horizontal accelerative force of 0.4g, and the requirement of the lateral force of the horizontal accelerative force of 0.6g.
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 with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. the photovoltaic plant low-voltage ride through detection system of a high altitude localities, described photovoltaic plant low-voltage ride through detection system comprises electrical network, grid side transformer, test cell, photovoltaic side transformer, tested photovoltaic cells and automatic detection and control system, it is characterized in that:
Described test cell comprises the lead-in circuit breaker, current limiting circuit breaker, current-limiting reactor and the wire-outgoing breaker that connect successively, described lead-in circuit breaker, current limiting circuit breaker, current-limiting reactor and wire-outgoing breaker bypass breaker in parallel;
The short-circuit reactance of series connection, circuit breaker, the switches set of three single-phase contactor parallel connections and single-phase contactor is connected, the described single-phase contactor ground connection of series connection between one end of described current-limiting reactor and described wire-outgoing breaker; The other end of described current-limiting reactor is connected by multiselect shunting switch with one end be connected with circuit breaker of described short-circuit reactance;
Described lead-in circuit breaker, described bypass breaker, described wire-outgoing breaker and described circuit breaker are respectively equipped with current transformer;
35KV voltage transformer one accesses between described lead-in circuit breaker and described grid side transformer; 35KV voltage transformer two and 10KV voltage transformer one access between described wire-outgoing breaker and described photovoltaic side transformer respectively by isolating switch;
Described automatic detection and control system comprises the monitoring modular of monitoring tested photovoltaic cells, the processing module realizing control module and the analysis detecting data automatically controlled.
2. the system as claimed in claim 1, is characterized in that: described monitoring modular obtains the information of described current transformer, the information of all voltage transformers, the state information of all circuit breakers and the signal of telecommunication, deciliter state of the switches set of described three single-phase contactor parallel connections and single-phase contactor, the switch position of described multiselect shunting switch and the state information of described isolating switch;
The state information of described circuit breaker comprises opening and closing state, operating mechanism information, warning information and accident information;
The described signal of telecommunication comprises three-phase voltage, three-phase current, power, power factor and frequency.
3. the system as claimed in claim 1, is characterized in that: described control module control all circuit breakers deciliter, described isolating switch deciliter, the lifting shelves of described multiselect shunting switch, the degree of depth is fallen in test, mode is fallen in test, the switches set of test drop-out time and described three single-phase contactor parallel connections and single-phase contactor deciliter.
4. system as claimed in claim 3, is characterized in that: the control method of described control module comprises the following steps:
I, closed described lead-in circuit breaker and described bypass breaker, drop into automatic detection and control system;
II, described automatic detection and control system receive backstage issue fall degree of depth instruction, according to reactance value coupling matrix, screening reactance value combination, control the file location of described multiselect shunting switch, complete test fall the degree of depth reactance value coupling;
III, described automatic detection and control system follow the test sent according to backstage to fall mode, select and control the described switches set of three single-phase contactor parallel connections and the compound mode of single-phase contactor, completing the switching of electric network fault mode;
VI, closed current limiting circuit breaker and wire-outgoing breaker, start to carry out low electricity and pass through pressure detection;
V, disconnection bypass breaker, closed circuit breaker, starts Voltage Drop;
VI, after described test drop-out time, again disconnect circuit breaker, end voltage is fallen;
VII, closed bypass breaker, disconnect current limiting circuit breaker and wire-outgoing breaker, terminate test.
5. the system as claimed in claim 1, is characterized in that: described processing module comprises the module realizing respectively gathering recorder data, resolving correction data and generation examining report.
6. system as claimed in claim 5, is characterized in that: the module of described collection recorder data is included in the high accuracy oscillograph of described current-limiting reactor and the installation of wire-outgoing breaker place;
Three-phase voltage when described high accuracy oscillograph record is tested and three-phase current is triggered, by recorded transfer of data to the module of resolving correction data before low voltage crossing on-test.
7. as the system that claim 5 is stated, it is characterized in that: the module of described parsing correction data receives the Wave data of high accuracy oscillograph, obtain test and fall the degree of depth, fault type, test duration, test number (TN);
By all-wave difference fourier algorithm and sequence analysis method, data transaction is become voltage, current waveform, obtain experimental test number;
The module of described parsing correction data, according to the low degree of depth of the voltage of background transfer, calculates drop-out time and the theoretical test data falling spoke value, experimental test data and described theoretical test data is contrasted, judge test result.
8. as the system that claim 5 is stated, it is characterized in that: the module of described generation examining report generates single test report according to test condition, test waveform, result of the test, testing time;
Single test report and test result are integrated, obtains test report.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410359537.7A CN104143834B (en) | 2014-07-25 | 2014-07-25 | A kind of photovoltaic plant low-voltage ride through detection system of high altitude localities |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410359537.7A CN104143834B (en) | 2014-07-25 | 2014-07-25 | A kind of photovoltaic plant low-voltage ride through detection system of high altitude localities |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104143834A CN104143834A (en) | 2014-11-12 |
| CN104143834B true CN104143834B (en) | 2016-04-20 |
Family
ID=51852942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410359537.7A Active CN104143834B (en) | 2014-07-25 | 2014-07-25 | A kind of photovoltaic plant low-voltage ride through detection system of high altitude localities |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104143834B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104917459B (en) * | 2015-05-27 | 2017-02-01 | 同济大学 | Low-voltage ride-through test system for photovoltaic power generation and method thereof |
| CN105337304B (en) * | 2015-10-19 | 2018-04-20 | 国家电网公司 | A kind of photovoltaic plant low voltage crossing data capture method |
| CN105471389B (en) * | 2015-11-09 | 2019-04-05 | 中国电力科学研究院 | A kind of the fault traversing detection system and method for photovoltaic plant/photovoltaic DC-to-AC converter |
| CN106772114A (en) * | 2015-11-18 | 2017-05-31 | 中国电力科学研究院 | A kind of multiple access voltage class method of testing of low-voltage ride-through detection equipment |
| CN105703364B (en) * | 2016-04-18 | 2018-02-13 | 哈尔滨工业大学 | Photovoltaic plant equivalent modeling method |
| CN106291356A (en) * | 2016-07-27 | 2017-01-04 | 山东大学 | A kind of Wind turbines grid-connected low voltage crossing far-end detecting system and method |
| CN112881935A (en) * | 2021-01-19 | 2021-06-01 | 南京信息工程大学滨江学院 | Compatible photovoltaic inverter low-voltage ride-through detection device and reactor determination method thereof |
| CN113281606A (en) * | 2021-07-22 | 2021-08-20 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Flexible DC power module test system and method |
| CN113783199B (en) * | 2021-09-18 | 2022-08-02 | 许昌开普检测研究院股份有限公司 | Automatic trigger control method and system for realizing voltage drop depth control in split phase manner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1107439A2 (en) * | 1999-12-01 | 2001-06-13 | Canon Kabushiki Kaisha | Interconnection power converter and power generation apparatus using the same |
| CN103675523A (en) * | 2013-11-14 | 2014-03-26 | 国家电网公司 | Large-scale photovoltaic power station low voltage ride through detection system suitable for high altitude regions |
| CN203561703U (en) * | 2013-10-29 | 2014-04-23 | 国家电网公司 | Voltage drop generator used for low voltage ride through test of photovoltaic grid-connected inverter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4648789B2 (en) * | 2005-07-29 | 2011-03-09 | 三菱電機株式会社 | Isolated operation prevention system |
-
2014
- 2014-07-25 CN CN201410359537.7A patent/CN104143834B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1107439A2 (en) * | 1999-12-01 | 2001-06-13 | Canon Kabushiki Kaisha | Interconnection power converter and power generation apparatus using the same |
| CN203561703U (en) * | 2013-10-29 | 2014-04-23 | 国家电网公司 | Voltage drop generator used for low voltage ride through test of photovoltaic grid-connected inverter |
| CN103675523A (en) * | 2013-11-14 | 2014-03-26 | 国家电网公司 | Large-scale photovoltaic power station low voltage ride through detection system suitable for high altitude regions |
Non-Patent Citations (1)
| Title |
|---|
| 光伏并网逆变器及其低电压穿越技术;王京保等;《低压电器》;20120915;第26-30页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104143834A (en) | 2014-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104143834B (en) | A kind of photovoltaic plant low-voltage ride through detection system of high altitude localities | |
| CN101304170B (en) | System debug method for high voltage direct current transmission project | |
| CN102736028B (en) | Mobile wind turbine generator system high-low voltage ride through test device | |
| US20140129195A1 (en) | Real time dynamic physics simulation device of flexible dc transmission system | |
| CN103064023B (en) | For grid-connected proving installation and the method for testing thereof of wind-powered electricity generation and photovoltaic | |
| CN201540676U (en) | Factory power supply integrated automatic training device | |
| CN104330979A (en) | Analog simulation system of complex power distribution network | |
| CN203037769U (en) | Wind power and photovoltaic grid-connected testing platform | |
| CN103454521A (en) | Wind power plant power grid operation simulator | |
| CN103472325B (en) | The detection platform of a kind of wave energy and marine tidal-current energy stand alone generating system | |
| CN102208801A (en) | Operation method for safely applying line protection device to wind power station | |
| CN201237626Y (en) | Debugging apparatus for arc suppression coil | |
| CN103746389A (en) | Reactive compensation configuration method based on reactive voltage feature for wind power 500kV collecting transformer substation | |
| CN202003012U (en) | Novel mobile modularized multi-functional MW-level low voltage ride-through capability detector | |
| KR101097290B1 (en) | Interconnection test devices of photovoltaic systems based on the wire and wireless networks | |
| CN111537842A (en) | Testing system and testing method for flexible direct current transmission converter station | |
| CN202649427U (en) | Mobile wind turbine generator system high-low voltage ride through test device | |
| CN210927503U (en) | Photovoltaic power generation and energy storage integrated power supply system | |
| CN104124916B (en) | High aititude photovoltaic plant electric network fault simulated testing system mobile detection apparatus | |
| CN204089727U (en) | High aititude photovoltaic plant electric network fault simulated testing system mobile detection apparatus | |
| CN111049468A (en) | Photovoltaic power generation and energy storage integrated power supply system and method | |
| CN104269859A (en) | Compensation device for distributed series capacitor | |
| CN206945842U (en) | A kind of distribution reactive power compensator analogue test platform | |
| CN201667165U (en) | Factory electricity-supplying technical training device | |
| CN111896887B (en) | Distribution network real-environment test platform connected with distributed power supply and test method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |