CN105991091B - A kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability - Google Patents
A kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability Download PDFInfo
- Publication number
- CN105991091B CN105991091B CN201510082713.1A CN201510082713A CN105991091B CN 105991091 B CN105991091 B CN 105991091B CN 201510082713 A CN201510082713 A CN 201510082713A CN 105991091 B CN105991091 B CN 105991091B
- Authority
- CN
- China
- Prior art keywords
- grid
- container
- node
- signal
- transformer
- 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
- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 15
- 230000006837 decompression Effects 0.000 claims abstract description 7
- 230000008859 change Effects 0.000 claims abstract description 4
- 238000002474 experimental method Methods 0.000 claims description 27
- 238000004891 communication Methods 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 14
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000001012 protector Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 4
- 230000008030 elimination Effects 0.000 claims description 4
- 238000003379 elimination reaction Methods 0.000 claims description 4
- 238000013501 data transformation Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000003044 adaptive effect Effects 0.000 description 10
- 238000010248 power generation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 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
Landscapes
- Photovoltaic Devices (AREA)
Abstract
Include that the boosting for being depressured change container, being connect with the tested generator unit of photovoltaic plant being connect with power grid becomes container, and collection controls container the present invention provides a kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability；It includes net side switchgear and step-down transformer, step-down transformer access set control container that decompression, which becomes container,；It includes pusher side switchgear and step-up transformer, step-up transformer access set control container that boosting, which becomes container,；Collection control container includes grid disturbance device sum aggregate control operating device；Grid disturbance device is used for the operating status of simulating grid；Collection control operating device, the technology requirement that should meet for adjusting system under the mobile detecting system working condition, and proposition high altitude environment.Compared with prior art, a kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability provided by the invention realizes grid adaptability inspection optimization, so that detection process is become reliable, meet High aititude requirement.
Description
Technical field
The present invention relates to a kind of mobile detecting systems for grid adaptability test, and in particular to one kind being used for High aititude
The mobile detecting system of photovoltaic plant grid adaptability test.
Background technology
Photovoltaic power generation technology development is swift and violent in world wide at present, and the photovoltaic plant that is largely incorporated into the power networks is established one after another, with
More and more photovoltaic generating system access power grids, big shadow is not caused to power grid in order to ensure the grid integration of photovoltaic plant
It rings and the operating status of power grid changes the equipment safety for not influencing photovoltaic plant, various countries' grid company is all to parallel network power generation
System proposes new strict demand, has formulated the standard of photovoltaic electric station grid connection access and grid-connected examination criteria one after another, only logical
The grid-connected detection for having crossed associated mechanisms, obtains grid-connected qualification, just can ensure that photovoltaic plant secure accessing operation of power networks, wherein light
It is one of which that overhead utility, which disturbs adaptive detection,.
Photovoltaic plant grid disturbance adaptability refers to working as in electric system, photo-voltaic power generation station grid entry point generation voltage change,
When frequency fluctuation, certain voltage change, frequency fluctuation time limit in, photo-voltaic power generation station can keep not off-grid continuously transport
Row.Current professional standard recommends low-voltage crossing detection device preferably to use variable-frequency power sources simulating grid frequency, the feelings of voltage fluctuation
Condition.
The abundant the Northwest of photovoltaic resources largely belongs to High aititude region, the site detecting equipment of grid-connected photovoltaic power station
It is in short supply.The grid adaptability detection device for developing High aititude movable type grid-connected photovoltaic power station is extremely urgent.In addition photovoltaic plant is suitable
The precision and the degree of automation of answering property detection experiment be not high, the running state information being unable in comprehensive monitoring experimentation, experiment
More human intervention is needed in the process, increases the complexity of test operation, also therefore brings the wind of personnel's operation error
Danger.And detecting system control principle and the defect in structure, harmonic wave is excessive, control accuracy is not high, and the entirety of detecting system is set
Standby or component will receive certain impact, and the generation of resonance condition can be caused when serious, this is to entire photovoltaic detecting system
Safety, equipment under test or even power grid all produce some potential safety problems.
Often it is related to high-voltage switch gear divide-shut brake during the experiment of grid disturbance adaptive detection, low-voltage circuit breaker connects
The operations such as continuous back brake, transformer switching.The reliability of this generic operation can greatly influence being normally carried out for experiment even can be to examination
Equipment is tested to damage, therefore, photovoltaic plant grid disturbance adaptive detection experiment during to transformer, high-tension switch cabinet,
The real time monitoring of low-voltage circuit breaker and large capacity variable-frequency power sources running state parameter is highly important.So a set of complete
Automatically control and comprehensive method of protection, when there is accidental situation to system, failure it is quick positioning be very necessary, to rear
Continuous Failure elimination, the recovery of experiment and the safety of testing equipment play certain guaranteeing role.Accordingly, it is desirable to provide a kind of
Have higher height above sea level adaptability, high reliability, drawing obtains, with live, improve the photovoltaic plant grid disturbance of automatization level
Adaptive detection system.
Invention content
In order to meet the needs of the prior art, the present invention provides one kind to survey for High aititude photovoltaic plant grid adaptability
The mobile detecting system of examination, the system comprises the decompressions being connect with power grid to become tested power generation list in container and photovoltaic plant
The boosting of member connection becomes container, and collection control container；
It includes net side switchgear and step-down transformer, the step-down transformer access set control packaging that the decompression, which becomes container,
Case；
It includes pusher side switchgear and step-up transformer, the step-up transformer access set control packaging that the boosting, which becomes container,
Case；
The collection control container includes grid disturbance device sum aggregate control operating device；The grid disturbance device is used for mould
The operating status of quasi- power grid；The collection controls operating device, the working condition for adjusting the mobile detecting system.
Preferably, the grid disturbance device includes variable-frequency power sources and grid simulator；The variable-frequency power sources includes safety
Chain circuit, and the first branch and the second branch that are connect respectively with transformer；
The grid simulator adjusts frequency, amplitude and the phase of inverter output AC electricity in the variable-frequency power sources；It will
The alternating current of first branch output is superimposed with the alternating current that the second branch exports, and obtains the alternating current for meeting testing requirements；
Preferably, the first branch includes sequentially connected capacitance C1, inverter PWM1 and filter LC1；It is described inverse
Become device PWM1 by the filtered DC inverters of capacitance C1 as alternating current, is accessed after the filtered device LC1 filtering of alternating current
In the transformer；
The first branch includes sequentially connected capacitance C2, inverter PWM2 and filter LC2；The inverter PWM2
It is alternating current by the filtered DC inverters of capacitance C2, the transformation is accessed after the filtered device LC2 filtering of alternating current
In device；
The transformer is connect with the step-up transformer that boosting becomes in container, and filtered alternating current is output to photovoltaic
The tested generator unit in power station；
Preferably, the grid simulator includes A/D conversion modules, FPGA and DSP；The A/D conversion modules, to described
The voltage signal and current signal of variable-frequency power sources output are sent to FPGA after carrying out data transformation；The FPGA, to the voltage
Signal and current signal carry out logical process；
The DSP controls the output letter of the variable-frequency power sources according to voltage signal and current signal that the FPGA is sent
Number, and the output signal and failure alarm signal are sent to the monitoring system of photovoltaic plant；
The control mode of the DSP includes fundamental mode and harmonic mode；
Preferably, the fundamental mode, for pair based on variable-frequency power sources output voltage instantaneous value and output current instantaneous value
Closed loop feedback control；
The harmonic mode, for the closed loop feedback control based on variable-frequency power sources output voltage instantaneous value；The harmonic mode
Feedforward control is carried out to the instantaneous voltage, to inhibit the higher hamonic wave in the instantaneous voltage；Feed-forward coefficients are 1-LC
ω2, the L and C are respectively the inductance value and capacitance of filter；
Preferably, the collection control operating device includes comprehensive protector, and the behaviour being connect respectively with communication controler
Make platform, PLC device and humiture instrument；The comprehensive protector and communication controler are connect with interchanger respectively；The exchange
The monitoring system that machine passes through Ethernet access photovoltaic plant；
The PLC device receives the control instruction that the monitoring system issues, the switching value letter of acquisition operations platform output
Number, the working condition of PLC is adjusted according to the control instruction and on-off model；
The output signal of the on-off model and humiture instrument is sent to the prison of photovoltaic plant by the communication controler
Control system；
Preferably, the operation console include experiment/stopping knob, point/combined floodgate knob CB1, point/combined floodgate knob CB2, failure
Involution button and scram button；
The experiment/stopping knob includes test node and Stop node, is used, respectively, to initiate detecting system and stops examining
Examining system；
Described point/combined floodgate knob CB1 includes separating brake node CB1 and combined floodgate node CB1；
Described point/combined floodgate knob CB2 includes separating brake node CB2 and combined floodgate node CB2；
The failure involution button, for the Manual reset operation after detecting system Failure elimination；
The scram button, for the manual stop detection system when breaking down；
Preferably, the scram button includes normally closed node and normally opened node；
The normally closed node respectively with the theft-resistant link chain circuit of variable-frequency power sources in grid disturbance device and combined floodgate node CB1
It connects with combined floodgate node CB2；The normally opened node is in parallel with separating brake node CB1 and separating brake node CB2 respectively；
Preferably, the working condition of the PLC device includes standing-by state, experiment state, fault case and shuts down state；
The PLC device receives in the operation console point/switching signal of combined floodgate knob CB1 and point/combined floodgate knob CB2
Sub-gate signal after, work in standing-by state；
The PLC device receives in the operation console point/switching signal of combined floodgate knob CB1 and point/combined floodgate knob CB2
Switching signal after, work in experiment state；
The PLC device receives in the operation console to be become in the actuating signal of scram button and grid disturbance device
After the actuating signal in the theft-resistant link chain circuit of frequency power, fault case is worked in；
In the case of the scram button and not operating theft-resistant link chain circuit, the PLC device receives the operation
In platform after the stopping actuating signal of experiment/stopping knob, shutdown state is worked in.
Compared with the immediate prior art, excellent effect of the invention is：
1, in technical solution of the present invention, the frequency adjusting control of variable-frequency power sources is flexible, can be generated by two-way inverter
Two-way frequency is adjusted with folded frequency method into line frequency, and the output frequency by adjusting two-way inverter obtains adaptability inspection with phase
Survey the output frequency needed；
2, in technical solution of the present invention, the output frequency of variable-frequency power sources has the advantages that precision is high, harmonic wave is small；
3, in technical solution of the present invention, PLC device includes standing-by state, experiment state, fault case and shuts down four kinds of work shapes of state
State can be flexibly met the various demands during adaptive detection, fully consider the exception being likely to occur in detection process
Situation ensure that the reliability of detecting system；
4, in technical solution of the present invention, PLC device refers to according to the control that the host computer of monitoring system in photovoltaic plant issues
It enables, automatically switches working condition, realize the full-automatic unmanned intervention of detection process, greatly improve the convenience of experiment, keep away
Exempt from the generation of fortuitous event；
5, in technical solution of the present invention, experiment/stopping knob in operation console, point/combined floodgate knob CB1, point/combined floodgate knob
The operating process of CB2, failure involution button and scram button are reliable, can be supervised to situations such as time-out in breaking-closing operating
Control avoids in detection process because divide-shut brake is unsuccessful leads to abnormal conditions for switch；
6, in technical solution of the present invention, it is determined that grid side, photovoltaic plant side and mobile detection under high altitude environment
The adaptive technique requirement of primary equipment in system substantially increases the electrical safety of high altitude localities mobile detecting system and reliable
Property；
7, in technical solution of the present invention, the fault case of mobile detecting system is monitored using comprehensive protector, when
When failure problem, trip protection is realized；
8, a kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability provided by the invention is realized
Optimization to grid disturbance adaptive detection, makes detection process become reliable and facilitate, meets the requirement of vehicle-mounted transport.
Description of the drawings
The following further describes the present invention with reference to the drawings.
Fig. 1：A kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability in the embodiment of the present invention
Structure chart；
Fig. 2：Variable-frequency power sources structure chart in the embodiment of the present invention；
Fig. 3：The fundamental mode control circuit schematic diagram of grid simulator in the embodiment of the present invention；
Fig. 4：The harmonic mode control circuit schematic diagram of grid simulator in the embodiment of the present invention；
Fig. 5：Grid simulator structural schematic diagram in the embodiment of the present invention；
Fig. 6：Collection control operating device structural schematic diagram in the embodiment of the present invention；
Fig. 7：The working condition transition diagram of PLC device in the embodiment of the present invention.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The present invention provides a kind of mobile detections suitable for the test of High aititude photovoltaic power station power generation unit grid adaptability
System realizes the networking communicated during photovoltaic plant disturbance adaptive detection, intelligent control, protection real time implementation, makes
It is safer reliable that photovoltaic plant disturbs adaptive detection process.
As shown in Figure 1, the mobile detecting system includes that the decompression being connect with power grid becomes container and photovoltaic electric in the present invention
The boosting of tested generator unit connection in standing becomes container, and collection control container.
One, decompression becomes container
Including net side switchgear and step-down transformer, step-down transformer access set control container.
Net side switchgear and step-down transformer are compatible with 35kV and 10kV in the present embodiment.
Net side switchgear refers to the switchgear for being integrated with the various electric switches of mobile detecting system access power grid.
Two, boosting becomes container
Including pusher side switchgear and step-up transformer, step-up transformer access set control container.
Pusher side switchgear and step-up transformer are compatible with 35kV and 10kV in the present embodiment；
Pusher side switchgear, each of generator unit will be tested in mobile detecting system access photovoltaic substation by referring to being integrated with
The switchgear of kind electric switch.
Three, collection control container
Including grid disturbance device sum aggregate control operating device.Wherein,
Grid disturbance device is used for the operating status of simulating grid；Collection control operating device, for adjusting mobile detecting system
Working condition.
1, grid disturbance device
Including variable-frequency power sources and grid simulator.Wherein,
Variable-frequency power sources includes theft-resistant link chain circuit, and the first branch and the second branch being connect respectively with transformer.
Grid simulator adjusts frequency, amplitude and the phase of inverter output AC electricity in variable-frequency power sources；By the first branch
The alternating current of output is superimposed with the alternating current that the second branch exports, to obtain the alternating current for meeting testing requirements.
(1) variable-frequency power sources
①：As shown in Fig. 2, the first branch includes sequentially connected capacitance C1, inverter PWM1 and filter LC1；Inversion
The filtered DC inverters of capacitance C1 are alternating current by device PWM1, and transformer is accessed after the filtered device LC1 filtering of alternating current
In.The first branch includes sequentially connected capacitance C2, inverter PWM2 and filter LC2；Inverter PWM2 filters capacitance C2
DC inverter afterwards is alternating current, after the filtered device LC2 filtering of alternating current in access transformer.
By the vector superposed of two inverters output, realize the high-precision control to output voltage, pass through two inversions
The frequency superposition of device output, realizes the control to exporting high-frequency harmonic.
②：The step-up transformer that transformer becomes container with boosting is connect, and filtered alternating current is output to photovoltaic electric
The tested generator unit stood.
③：Theft-resistant link chain circuit is one group of concatenated normally closed connection circuit, and theft-resistant link chain action can trigger emergency shutdown.
(2) grid simulator
①：As shown in figure 5, grid simulator includes A/D conversion modules, FPGA and DSP.Wherein,
A/D conversion modules, voltage signal and current signal data to variable-frequency power sources output are sent to FPGA after converting.
FPGA carries out logical process to voltage signal and current signal, and by treated, signal is sent in DSP.
In the present embodiment, FPGA has signal acquisition, A/D conversions, output protection signal and carries out data interaction etc. with DSP
Function.FPGA receives the signal that the host computer of monitoring system in photovoltaic plant is sent, and is handled, such as receives under host computer
Up to " starting to test " On-off signal signal.FPGA carries out logical process, example to signals such as voltage, the electric currents of A/D sampling outputs
Zero crossing such as is judged to voltage signal, to obtain frequency information.Current sampling signal is analyzed, it is found that electric current is excessive,
Then send out protection signal.FPGA is also given the information such as the voltage acquired, electric current, logical process by data/address bus simultaneously
DSP so as to calculate virtual value, the instantaneous value of voltage, electric current, and controls variable-frequency power sources.
DSP controls the output signal of variable-frequency power sources according to the FPGA voltage signals sent and current signal, and will
Output signal and failure alarm signal are sent to the host computer of monitoring system in photovoltaic plant.
②：The control mode of DSP includes fundamental mode and harmonic mode.
As shown in figure 3, fundamental mode is to be closed based on variable-frequency power sources output voltage instantaneous value and the double of output current instantaneous value
Ring feedback control can not only meet the variable-frequency power sources for obtaining high performance index using Dual-loop feedback control control, can also improve
The response speed and stability of mobile detecting system.
As shown in figure 4, harmonic mode is the closed loop feedback control based on variable-frequency power sources output voltage instantaneous value.
Harmonic mode carries out feedforward control to instantaneous voltage, to inhibit the higher hamonic wave in instantaneous voltage；Feedforward system
Number is 1-LC ω2, L and C are respectively the inductance value and capacitance of filter.Negative feedback current feedforward control is introduced in current inner loop
System accelerates inverter dynamic responding speed, enhances the adaptability disturbed to linear load, and effectively reduce output voltage
Harmonic content.
2, collection control operating device
As shown in fig. 6, include comprehensive protector, and operation console, PLC device and the temperature being connect respectively with communication control
Hygronom；Comprehensive protector and communication controler are connect with interchanger respectively；Interchanger passes through Ethernet access photovoltaic plant
Inspection and monitoring system host computer.Wherein,
PLC device is with RS485 communication protocol access communications controllers, and the on-off model of acquisition operations platform output；
Comprehensive protector realizes the prison of the electrical quantity in photovoltaic plant detection process by ethernet access switch
Control, the device to play a protective role to the abnormal conditions (short circuit, open circuit, phase shortage etc.) in circuit；It is comprehensive in the present embodiment
The number for closing protective device is 2.
The output signal of on-off model and humiture instrument is sent to monitoring system in photovoltaic plant by communication controler
In host computer, completes RS485 communication protocols and converted to the exchange of ethernet communication protocol.
(1) operation console
Including experiment/stopping knob, point/combined floodgate knob CB1, point/combined floodgate knob CB2, failure involution button and emergency stop press
Button.Wherein,
①：Experiment/stopping knob includes test node and Stop node, is used, respectively, to initiate detecting system and stops detecting
System.
②：Point/combined floodgate knob CB1 includes separating brake node CB1 and combined floodgate node CB1.
③：Point/combined floodgate knob CB2 includes separating brake node CB2 and combined floodgate node CB2.
④：Failure involution button, for the Manual reset operation after detecting system Failure elimination.
⑤：Scram button, for the manual stop detection system when breaking down.
Scram button includes normally closed node and normally opened node：
The theft-resistant link chain circuit with variable-frequency power sources in grid disturbance device, combined floodgate node CB1 and combined floodgate save normally closed node respectively
Point CB2 series connection；Normally opened node is in parallel with separating brake node CB1 and separating brake node CB2 respectively.
(2) working condition of PLC device includes standing-by state, experiment state, fault case and shuts down state.System is monitored in photovoltaic plant
Parameter setting values and control instruction are handed down to PLC device by the host computer of system by communication controler：
The on-off model that PLC device is exported according to control instruction and operation console, carries out working condition conversion, according to parameter
Setting value carries out the parameter setting of corresponding working state.PLC device uploads to the ongoing data information of working condition in real time
In the host computer of photovoltaic plant.Wherein,
①：PLC device receives in the operation console point/switching signal of combined floodgate knob CB1 and point/combined floodgate knob CB2
Sub-gate signal after, work in standing-by state.For characterizing, mobile detecting system is completed disturbance and adapts to standing-by state in the present embodiment
Property detection on-test before preparation, system is in hot stand-by duty.
②：PLC device receives in the operation console point/switching signal of combined floodgate knob CB1 and point/combined floodgate knob CB2
Switching signal after, work in experiment state.State is tested in the present embodiment for characterizing, it is suitable that mobile detecting system has been provided with disturbance
The logical condition of answering property detection.In the case where testing state.PLC device output variable-frequency power sources enable signal, variable-frequency power sources normal boot-strap, if
Setting the corresponding disturbance parameter of grid disturbance device can start to test.
③：PLC device receives in the operation console frequency conversion in the actuating signal of scram button and grid disturbance device
After the actuating signal in the theft-resistant link chain circuit of power supply, fault case is worked in.Meanwhile when controlling operation failure, detecting system also turns
Enter fault case.For fault case for characterizing, there are abnormal conditions in mobile detecting system in the present embodiment.Under fault case, PLC device
All breakers of disjunction cancel variable-frequency power sources enable signal.
④：In the case of scram button and not operating theft-resistant link chain circuit, PLC device receive in operation console experiment/
After the stopping actuating signal for stopping knob, shutdown state is worked in.State is shut down in the present embodiment for characterizing, at mobile detecting system
In run-stopping status.
(3) the working condition transfer process of PLC device is：
As shown in fig. 7, when the original state of PLC device is to shut down state, point/combined floodgate knob CB1 separating brakes divide/rotation of closing a floodgate
Button CB2 separating brakes：
①：Experiment/stopping knob being pressed, point/combined floodgate knob CB1 combined floodgates, point/combined floodgate knob CB2 holding gate-dividing states, it moves
Dynamic detecting system enters standby mode；
②：Point/combined floodgate knob CB1 holding "on" positions, divide/combined floodgate knob CB2 combined floodgates, mobile detecting system to enter experiment
State；
③：Point/combined floodgate knob CB2 keeps "on" position, point/combined floodgate knob CB1 separating brakes or theft-resistant link chain circuit behavior or
Person presses scram button, and mobile detecting system enters fault case；
④：If theft-resistant link chain circuit is not operating and when not pressing scram button, point/combined floodgate knob CB1 separating brakes divide/closes a floodgate and revolve
Button CB2 separating brakes press failure involution button, press experiment/stopping knob, and mobile detecting system enters shutdown state.
Four, 4500 meters of atmospheric conditions of height above sea level are distinguished very big compared with plains region, to the primary insulation of high-tension apparatus, high-power are set
Standby heat-radiation belt centainly requires, it is therefore desirable to determine a kind of adaptive technique requirement of the lower secondary device of high altitude environment, specifically
Including：
①：After the manufacture test of the equipment such as high-tension apparatus transformer, switchgear, a cable should meet High aititude finishing
National standard.
②：Primary equipment in mobile detecting system is completed to carry out container after vehicle-mounted installation in container in all devices
Interior industrial frequency withstand voltage test, primary system (except voltage, current transformer) are tested according to 85kV insulation pressure resistances for 1 minute, and
Testing location is high altitude localities, such as in plains region, then height above sea level finishing is carried out according to national standards, so that it is guaranteed that equipment is whole
The electrical insulation properties safety of installation process.
③：Forced air cooling or natural air cooled equipment cooling require 1.5 times of designs according to plains region heat-sinking capability, from
And make up the influence that high altitude localities rarefaction of air is brought.
Finally it should be noted that：Described embodiment is only some embodiments of the present application, rather than whole realities
Apply example.Based on the embodiment in the application, those of ordinary skill in the art are obtained without making creative work
Every other embodiment, shall fall in the protection scope of this application.
Claims (8)
1. a kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability, which is characterized in that the system
Include the boosting change container that the decompression being connect with power grid becomes container, connect with tested generator unit in photovoltaic plant, and
Collection control container；
It includes net side switchgear and step-down transformer, the step-down transformer access set control container that the decompression, which becomes container,；
It includes pusher side switchgear and step-up transformer, the step-up transformer access set control container that the boosting, which becomes container,；
The collection control container includes grid disturbance device sum aggregate control operating device；The grid disturbance device, for simulating electricity
The operating status of net；The collection controls operating device, the working condition for adjusting the mobile detecting system；
The grid disturbance device includes variable-frequency power sources and grid simulator；The variable-frequency power sources includes theft-resistant link chain circuit, and
The first branch and the second branch being connect respectively with transformer；
The grid simulator adjusts frequency, amplitude and the phase of inverter output AC electricity in the variable-frequency power sources；By first
The alternating current of branch output is superimposed with the alternating current that the second branch exports, and obtains the alternating current for meeting testing requirements.
2. the system as claimed in claim 1, which is characterized in that the first branch includes sequentially connected capacitance C1, inversion
Device PWM1 and filter LC1；The filtered DC inverters of capacitance C1 are alternating current, the alternating current by the inverter PWM1
It is accessed in the transformer after filtered device LC1 filtering；
The first branch includes sequentially connected capacitance C2, inverter PWM2 and filter LC2；The inverter PWM2 will be electric
The appearance filtered DC inverters of C2 are alternating current, are accessed in the transformer after the filtered device LC2 filtering of alternating current；
The transformer is connect with the step-up transformer that boosting becomes in container, and filtered alternating current is output to photovoltaic plant
Tested generator unit.
3. the system as claimed in claim 1, which is characterized in that the grid simulator include A/D conversion modules, FPGA and
DSP；The A/D conversion modules, voltage signal and current signal to variable-frequency power sources output are sent after carrying out data transformation
To FPGA；The FPGA carries out logical process to the voltage signal and current signal；
The DSP controls the output signal of the variable-frequency power sources according to voltage signal and current signal that the FPGA is sent,
And the output signal and failure alarm signal are sent to the monitoring system of photovoltaic plant；
The control mode of the DSP includes fundamental mode and harmonic mode.
4. system as claimed in claim 3, which is characterized in that the fundamental mode, to be based on variable-frequency power sources output voltage wink
The Dual-loop feedback control of duration and output current instantaneous value controls；
The harmonic mode, for the closed loop feedback control based on variable-frequency power sources output voltage instantaneous value；The harmonic mode is to institute
It states instantaneous voltage and carries out feedforward control, to inhibit the higher hamonic wave in the instantaneous voltage；Feed-forward coefficients are 1-LC ω2,
The L and C is respectively the inductance value and capacitance of filter.
5. the system as claimed in claim 1, which is characterized in that the collection control operating device includes comprehensive protector, and
Operation console, PLC device and the humiture instrument being connect respectively with communication controler；The comprehensive protector and communication controler point
It is not connect with interchanger；The monitoring system that the interchanger passes through Ethernet access photovoltaic plant；
The PLC device, receives the control instruction that the monitoring system issues, the on-off model of acquisition operations platform output, according to
The working condition of PLC is adjusted according to the control instruction and on-off model；
The output signal of the on-off model and humiture instrument is sent to the monitoring system of photovoltaic plant by the communication controler
System.
6. system as claimed in claim 5, which is characterized in that the operation console includes experiment/stopping knob, divides/close a floodgate rotation
Button CB1, divide/combined floodgate knob CB2, failure involution button and scram button；
The experiment/stopping knob includes test node and Stop node, is used, respectively, to initiate detecting system and stops detection system
System；
Described point/combined floodgate knob CB1 includes separating brake node CB1 and combined floodgate node CB1；
Described point/combined floodgate knob CB2 includes separating brake node CB2 and combined floodgate node CB2；
The failure involution button, for the Manual reset operation after detecting system Failure elimination；
The scram button, for the manual stop detection system when breaking down.
7. system as claimed in claim 6, which is characterized in that the scram button includes normally closed node and normally opened node；
The normally closed node respectively with the theft-resistant link chain circuit of variable-frequency power sources in grid disturbance device and combined floodgate node CB1 and conjunction
The CB2 series connection of lock node；The normally opened node is in parallel with separating brake node CB1 and separating brake node CB2 respectively.
8. system as claimed in claim 5, which is characterized in that the working condition of the PLC device includes standing-by state, experiment
State, fault case and shutdown state；
The PLC device receives in the operation console point/switching signal of combined floodgate knob CB1 and point/point of combined floodgate knob CB2
After lock signal, standing-by state is worked in；
The PLC device receives in the operation console point/switching signal of combined floodgate knob CB1 and point/conjunction of combined floodgate knob CB2
After lock signal, experiment state is worked in；
The PLC device receives in the operation console variable-frequency electric in the actuating signal of scram button and grid disturbance device
After the actuating signal in the theft-resistant link chain circuit in source, fault case is worked in；
In the case of the scram button and not operating theft-resistant link chain circuit, the PLC device receives in the operation console
After the stopping actuating signal of experiment/stopping knob, shutdown state is worked in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510082713.1A CN105991091B (en) | 2015-02-15 | 2015-02-15 | A kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510082713.1A CN105991091B (en) | 2015-02-15 | 2015-02-15 | A kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105991091A CN105991091A (en) | 2016-10-05 |
| CN105991091B true CN105991091B (en) | 2018-08-28 |
Family
ID=57041530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510082713.1A Active CN105991091B (en) | 2015-02-15 | 2015-02-15 | A kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105991091B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802515A (en) * | 2018-04-05 | 2018-11-13 | 董晨晖 | A kind of electric power network adaptive testing device |
| CN116699346A (en) * | 2023-08-08 | 2023-09-05 | 西安高压电器研究院股份有限公司 | Power frequency withstand voltage test loop and power frequency withstand voltage test method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166240A (en) * | 2011-12-15 | 2013-06-19 | 中国科学院电工研究所 | Grid-connected solar photovoltaic power station monitoring system |
| CN103176142B (en) * | 2013-02-26 | 2015-09-09 | 国家电网公司 | A kind of photovoltaic electric station grid connection adaptive testing method |
| KR101454197B1 (en) * | 2014-06-23 | 2014-10-24 | (재) 한국전기산업연구원 | High Efficiency Power Delivery Device for Photovoltaic Power System |
| CN104124757B (en) * | 2014-06-30 | 2017-02-08 | 国家电网公司 | Background operation monitoring system for power grid fault simulation detection device of high-altitude photovoltaic power station |
| CN204089728U (en) * | 2014-06-30 | 2015-01-07 | 国家电网公司 | High aititude photovoltaic plant grid disturbance simulated testing system mobile detection apparatus |
-
2015
- 2015-02-15 CN CN201510082713.1A patent/CN105991091B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN105991091A (en) | 2016-10-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103915836B (en) | A kind of use for laboratory smart micro-grid system based on multiple distributed power sources | |
| CN102664459B (en) | Medium-voltage electrically-propelled ship power management system and management method | |
| CN102324741B (en) | Micro-power grid off-grid energy balance and control device and method | |
| CN103424692A (en) | Direct-current circuit breaker on-off characteristic test method | |
| CN205354423U (en) | Intelligent substation emulation training system | |
| CN111799887B (en) | 220kV intelligent high-voltage switch control system | |
| CN105991091B (en) | A kind of mobile detecting system for the test of High aititude photovoltaic plant grid adaptability | |
| CN202634066U (en) | Power management system of medium-voltage electric propulsion ship | |
| CN104124916A (en) | Power grid fault simulation test system movement detection device for high-altitude photovoltaic power station | |
| CN206945842U (en) | A kind of distribution reactive power compensator analogue test platform | |
| CN112557704A (en) | Alternating current-direct current series-parallel connection power distribution network frame capable of being flexibly configured and true type test system | |
| Liu et al. | A scaled-down microgrid laboratory testbed | |
| CN207518284U (en) | A kind of accident disconnection device of small power incorporating into power network | |
| CN203519736U (en) | Photovoltaic inverter testing platform | |
| CN102981121B (en) | Wind turbine generator set mobile type low voltage crossing test unit theft-resistant link chain and implementation method | |
| CN206226121U (en) | A kind of intelligent distribution network automated remote terminal of power data collecting system | |
| CN214045032U (en) | Novel intelligent direct current of transformer substation screen | |
| CN204131125U (en) | A kind of use for laboratory smart micro-grid system based on multiple distributed power source | |
| CN113937766A (en) | Multi-level networking load control method, system and interactive terminal | |
| CN114188941A (en) | Intelligent platform area fusion terminal system and application method thereof | |
| CN107015084A (en) | A kind of distribution reactive power compensator analogue test platform | |
| CN104184412B (en) | A kind of photovoltaic plant low-voltage crossing movement detection automatic control system | |
| CN105375784A (en) | Power output control system | |
| CN205430068U (en) | Power output control system | |
| Genghuang et al. | Design and implementation of PLC based reclosing device on synchronization line of small hydropower stations |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |