CN109638963A - The grid-connected interface adaptive managing device of distributed generation resource based on wide time scale - Google Patents
The grid-connected interface adaptive managing device of distributed generation resource based on wide time scale Download PDFInfo
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- CN109638963A CN109638963A CN201811585735.XA CN201811585735A CN109638963A CN 109638963 A CN109638963 A CN 109638963A CN 201811585735 A CN201811585735 A CN 201811585735A CN 109638963 A CN109638963 A CN 109638963A
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- 230000033228 biological regulation Effects 0.000 claims abstract description 8
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- 230000007613 environmental effect Effects 0.000 claims description 7
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- 230000001276 controlling effect Effects 0.000 claims description 3
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Classifications
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- H02J13/0062—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
Abstract
The invention discloses a kind of grid-connected interface adaptive managing device of distributed generation resource based on wide time scale, technical problems to be solved are the operational modes according to distributed generation resource, complete the protection of wide time scale and frequency range.The present invention is equipped with CPU board, and the application layer of CPU board is equipped with wide time scale protective module, Multiple Time Scales control module, site coordinating control module, communication management module, sampling and vector calculation module, opens into and remote signalling processing module, output processing module and definite value and its parameter processing module.The present invention is compared with prior art; by being declined source site power coordination and Multiple Time Scales control program using cloth with controlling grid-connected interface adaptive; site realizes the fault-tolerant protection of the regulation of the wide time scale of distributed generation resource, the optimization distribution and equipment of power; the precision of timeliness and control that enhancing data utilize; the safety and stability performance of distributed generation resource and other equipment is improved, utilizes distributed generation resource to the greatest extent.
Description
Technical field
The present invention relates to a kind of relay protection and monitoring device, especially a kind of distributed electrical source protection and monitoring device.
Background technique
Distributed generation resource DR (Distributed Resources) refers to place or construction installation nearby, fortune where user
Line mode with user side generate power for their own use based on power generating equipment, including solar energy, natural gas, biomass energy, wind energy, geothermal energy,
The microgrid that ocean energy, comprehensive utilization of resources power generation are connected containing CMM Power Generation.Distributed generation resource is connected to by simultaneously network interface
Bulk power grid realizes the energy flow between microgrid and bulk power grid.And network interface is interface inverter, isolating transformer and grid-connected disconnected
Road device.Compared with traditional bulk power grid, simultaneously network interface has significant power electronics feature to distributed generation resource: 1) distributed generation resource can
With work in island mode and grid-connect mode, wherein island mode distributed generation resource supports the voltage and frequency of independent micro-grid, and
Electric voltage frequency is supported by bulk power grid under grid-connect mode；2) distributed generation resource and network interface have wide time scale characteristic, wherein electricity
The response time of power electronic switch is several gsecs, and the interface inverter control system response time is in tens microseconds to several milliseconds
Between grade, the response time of isolating transformer and grid-connected breaker is more than Millisecond.Therefore, the electric network protection prison of the prior art
Device is surveyed to be difficult to be useful in distributed micro-grid and the monitoring for protection of network interface and the occasion of pattern switching.
Summary of the invention
The object of the present invention is to provide a kind of grid-connected interface adaptive management dresses of distributed generation resource based on wide time scale
It sets, technical problems to be solved are the operational modes according to distributed generation resource, adaptive to complete wide time scale and frequency range
Protection, monitoring and communication.
The invention adopts the following technical scheme: a kind of grid-connected interface adaptive pipe of distributed generation resource based on wide time scale
Manage device, be equipped with CPU board, the application layer of the CPU board be equipped with wide time scale protective module, Multiple Time Scales control module,
Site coordinating control module, communication management module, sampling and vector calculation module are opened into and remote signalling processing module, output place
Manage module and definite value and its parameter processing module；
The width time scale protective module selects protection seting value, divides in the wide time range of grade from Microsecond grade to minute
Shi Xian not decline to different distributions source, a route in micro-grid system, isolating transformer, load and interface inverter carry out it is more
Level protection act；
The operating mode of the power output in the micro- source of the Multiple Time Scales control module control interface inverter, microgrid, it is micro-
The adjusting of net voltage to frequency controls；
The site power coordination module receives microgrid central controller and predicts instruction value a few days ago, grid-connected according to concentrating
It is distributed the work health data and environmental parameter in the source that declines, is handled by data optimization and coordinated control calculating is each
It is distributed the optimal generation scheme in a short time in the source that declines, generates wide time scale control instruction；
Optimization processing is calculated with coordinated control are as follows: according to interface inverter style and its site real time data,
It is distributed the source operating condition that declines, environmental aspect progress data, micro- source dynamic power curve of output is fitted, obtains Short Term Generation Schedules；Together
When, the instruction of prediction a few days ago that microgrid central controller issues is made the difference compared with the power output value in total practical micro- source, is moved
State performance number, then compared with being made the difference with the power output curve in each micro- source of interface inverter, the smallest fitting of final choice difference
Dotted line operating point value, the instruction of the power output value as interface inverter；
The communication management module declines in microgrid central controller and distribution and establishes communication connection between source, will be distributed
Microgrid central controller is given in the telemetering and remote signalling information in micro- source, while receiving the remote control of microgrid central controller and remote regulating refers to
It enables；It declines the source remote control that issues of forwarding microgrid central controller and remote regulating instruction to distribution, collects sampling and vector calculation module
The distribution of sampling declines the telemetering and remote signalling information in source；
The sampling and vector calculation module sampling isolating transformer and net side three-phase voltage, electric current and microgrid busbar voltage
Data-signal, signal calculates trend value, micro net power quality information between microgrid and major network according to the collected data, passes through
It is sent in communication management module to microgrid central controller；
It is described open into and the grid-connected breaker of remote signalling processing module real-time monitoring, load break switch state position signal, lead to
It crosses in communication management module and send to microgrid central controller；
The telecommand outputing processing module and being issued by communication management module reception microgrid central controller, generates
It is corresponding to output signal, closed procedure is carried out to the breaker of grid-connected breaker and load；
The definite value and its parameter processing module according to open into and remote signalling processing module monitor the division of grid-connected breaker
Position determines the operating mode of microgrid, selectes different protected object and setting valve, is then handed down to wide time scale protection mould
Block, as its protection act parameter value.
Wide time scale protective module of the invention realizes protection meter using O&M scale and two dimensions of time scale
It calculates；
The O&M scale includes protected object, operational mode and protection type and its setting valve；
The time scale is that ten Microsecond grades, hundred Microsecond grades, Millisecond, ten Milliseconds, second grade, minute grade and hour grade are protected
Shield acts gear.
Protected object of the invention includes interface inverter, load, route, isolating transformer, energy-storage battery in microgrid
Micro- source is distributed the source that declines；
The operational mode is divided into island mode and grid-connect mode；
The protection type and its setting valve are island mode and overcurrent protection, power protection, over-voltage under grid-connect mode
Protection, under-voltage protection, carrier current protection and underfrequency protection and its setting valve.
It is inverse as Microsecond grade, interface that Multiple Time Scales control module of the invention sets the electronic power switch action command period
Become device control select or switching command into Millisecond, primary frequency modulation pressure regulation instruction cycle be the second grade, frequency modulation frequency modulation pressure regulation instruction
Period and centralized grid type microgrid operational mode switching command period are that minute grade, monomer distribution decline source power output plan
Instruction is minute to hour grade.
Site power coordination module of the invention generates wide time scale control instruction, surveys as Multiple Time Scales
Control the input instruction of module.
Site power coordination module of the invention is arranged the micro- source operation of each interface inverter and uses job rotating system.
Telemetering and remote signalling information of the invention be respectively and the voltage of each interface inverter off the net, electric current real time data and
The position signal of grid-connected breaker, load break switch；The remote control and remote regulating instruction are respectively grid-connected breaker, load break switch
The division signal and micro- source general power output of the grid-connected interface of centralization, active with idle, voltage, frequency.
Micro net power quality of the invention includes harmonic content, frequency, voltage magnitude.
The grid-connected interface adaptive managing device of distributed generation resource based on wide time scale of the invention is equipped with record processing
Module and interface display processing module；
The logging modle records the remote control remote regulating time that microgrid central controller issues, the division behaviour of breaker in microgrid
Make, the change event of the operational mode of interface inverter and parameter；
Voltage, electric current and the power quality of the display of interface display the processing module sampling and data processing module, interface
The operating mode of inverter and the information of power output situation.
The input and output plate and grid-connected breaker and load disconnected that communication management module of the invention is connected through control bus
The control loop of road device connects, wide time scale protective module, Multiple Time Scales control module, site coordinating control module mould
The control signal that block generates, the control life that the microgrid central controller and display panel received through communication management module issues
It enables, that outputs processing module generation outputs signal, and the breaker division of grid-connected breaker and load is controlled through input and output plate.
Compared with prior art, the present invention according to the operating mode of distributed generation resource, by controlling grid-connected interface adaptive
Ground is declined source site power coordination and Multiple Time Scales control program using cloth, and site realizes the wide time ruler of distributed generation resource
The fault-tolerant protection of regulation, the optimization distribution and equipment of power of degree, the precision of timeliness and control that enhancing data utilize mention
The safety and stability performance of high distributed generation resource and other equipment utilizes distributed generation resource to the greatest extent.
Detailed description of the invention
Fig. 1 is that the grid-connected interface adaptive managing device of the distributed generation resource of the invention based on wide time scale externally interacts
Connection schematic diagram.
The structural schematic diagram of Fig. 2 embodiment of the present invention.
The schematic diagram of management system structure of Fig. 3 embodiment of the present invention.
The application layer module of Fig. 4 embodiment of the present invention divides figure.
The O&M scale and time scale scheme schematic diagram of Fig. 5 embodiment of the present invention.
The distribution of Fig. 6 embodiment of the present invention declines source site power coordination control and Multiple Time Scales divide control principle drawing.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, the grid-connected interface adaptive managing device of the distributed generation resource of the invention based on wide time scale (pipe
Manage device, device), to all distributed generation resources (micro- source) 1~N and interface inverter 1 of the connection of lower communication access micro-grid system
~N obtains its voltage, electric current and its state, obtains voltage, the electric current of grid-connected transformer, obtains grid-connected breaker S1 and load
Status signal, ammeter and intelligent electronic device IED (Intelligent Electronic Device) information of breaking S2.Its
In, interface inverter and distribution decline source voltage, electric current and its status signal by low-and high-frequency channel transfer to managing device, and
The status signal of net breaker S1 and load cut-off S2, ammeter, IED information pass to managing device by low frequency channel.Management
Device accesses microgrid central controller through control net and monitoring Network Communication on, and the number of managing device itself He IED is sent in forwarding
According to.Managing device receives the instruction of microgrid central controller, and in conjunction with the communication and operating status of interface inverter, allocation schedule is simultaneously
It is handed down to the execution of interface inverter, so that the instruction that total output tracking microgrid central controller of the branch issues.
Micro-grid system connects bulk power grid (380V power grid) through grid-connected breaker S1.
As shown in Fig. 2, the grid-connected interface adaptive managing device of the distributed generation resource of the invention based on wide time scale, if
There is central processor CPU (Central Processing Unit) plate 6, CPU board 6 is connected with process layer optical port, station level network interface
With serial ports B code 5, data/address bus, control bus and management bus.
Data/address bus is connected with AC sampling plate 3, communication extension plate 4.
Control bus is connected with power panel 1, input and output plate 2, panel lighting 8.
Management bus is connected with display board 9, panel debugging serial interface 7.
Power panel 1 provides reliable and stable 24V and 15V power supply for entire managing device.
Input and output plate 2 is responsible for the grid-connected breaker of acquisition and load break switch working condition, opens and output letter into relay
Breath, passes to CPU board 6.
AC sampling plate 3 is responsible for the ac analog acquisition of transformer voltage electric current, interface inverter delivery outlet electric current, passes
Pass CPU board 6.
Communication extension plate 4 is equipped with 8 RS485 serial ports, is used to and external device communication, establishes and user equipment, kilowatt-hour meter
Communication connection.
Display board 9 receives the remote regulating remote signalling information that the slave microgrid central controller that CPU board 6 is sent receives, and is responsible for management
The display and setting of device information, operating mode, the power output value information of interface inverter.
On-site programmable gate array FPGA (Field Programmable Gate Array) and height are provided on CPU board 6
Grade Reduced Instruction Set Computer ARM (Advanced RISC Machine) processor, FPGA are responsible for the protection control of managing device
The logic of function is realized and its external telecommunication management, ARM are responsible for managing and showing grid-connected interface voltage, electric current, power, interface
Inverter operating mode and power output information.
As shown in figure 3, CPU board 6 is equipped with management system, management system is equipped with application layer Application 61, general guarantor
Protect monitoring function podium level Platform 62, operating system layer Os 63 and driving layer BSP 64.
Application layer 61 carry out wide time scale the grid-connected interface adaptive Interruption of distributed generation resource, in real time processing and it is more
Thread task operating.
General monitoring for protection function platform layer 62 includes system call interfaces and platform feature module.
The request of application layer 61 is passed to platform feature module by system call interfaces, then calls corresponding kernel function
Processing result, is finally returned to the interface of application layer 61 by the processing of monitoring for protection needed for completing.
Platform feature module is called for application layer 61, carries out monitoring for protection processing, and final process result returns to application layer
61 interface.
Operating system layer 63 is equipped with thread scheduling module, network protocol module, memory management module and file system module.
Thread scheduling module carries out Resource Distribution and Schedule to operating system by the prior art.
Network protocol when network protocol module is provided to be communicated with internet by the prior art.
Memory management module realizes elasticity distribution formula data set RDD (Resilient Distributed by the prior art
Datasets the persistence of caching Shuffle data).
File system module realizes file access and management by the prior art, and provides a series of file input and output function
Energy.
Driving layer 64 is that application layer 61, general monitoring for protection function platform layer 62, operating system layer 63 mention by the prior art
For the operation interface of external equipment, the driving to management system is realized.
As shown in figure 4, application layer 61 is equipped with wide time scale protective module 611, Multiple Time Scales control module 612, just
Ground coordinating control module 613, communication management module 614, sampling and vector calculation module 615, open into and remote signalling processing module
616, processing module 617, definite value and its parameter processing (double mode definite value and its parameter processing) module 618, record processing are outputed
(time record) module 619 and interface display processing module 6110.
According to the operational mode of microgrid and based on different protected objects, selection corresponds to wide time scale protective module 611
Protection seting value, realize in the wide time range of grade from Microsecond grade to minute and decline source, micro-grid system to different distributions respectively
In a route, isolating transformer (grid-connected transformer), load (load) and the multi-level protection act of interface inverter progress.
As shown in figure 5, the wide adaptive protection of pipe module 611 of time scale is using O&M scale (O&M space) and time ruler
Two dimensions are spent to realize that protection calculates.
From the point of view of O&M space, three key elements for constituting wide time scale and adaptive protection of pipe include protection pair
As, operational mode and protection type and its setting valve.
Protected object includes the capital equipment in microgrid: interface inverter, load, route, isolating transformer, energy-storage battery
Micro- source, various distributions decline source.
Operational mode is divided into island mode and grid-connect mode.The frequency of microgrid and voltage are by distributed generation resource when island mode
It supports, micro-grid system can bear overcurrent-overvoltage overpower at this time, fault transient impact capacity is relatively low.Grid-connect mode operation
When, the frequency and voltage of micro-grid system are mainly supported by bulk power grid, therefore microgrid receiving failures are stronger.
Protection type is respectively overcurrent protection, power protection, overvoltage protection, under-voltage guarantor under island mode and grid-connect mode
Shield, carrier current protection and underfrequency protection and its setting valve.The operational mode of micro-grid system is different, the topology and processing event of micro-grid system
There are larger differences for barrier ability.Under island mode, managing device selects adaptive strategy for island mode protection and its setting valve
(1 series).Under grid-connect mode, managing device selects adaptive strategy for grid-connect mode protection and its setting valve (2 series).
When managing device open into and remote signalling processing module 616 detect grid-connected breaker S1 and be in quartile state when, microgrid
In island mode, 2 series of adaptive strategy protection and its setting valve selection.It is in when managing device detects grid-connected breaker S1
When coincidence state, microgrid is in grid-connect mode, 2 series of adaptive strategy protection and its setting valve selection.
In terms of time scale, since distributed generation resource microgrid is poor with significant power electronics feature, and different micro- sources
Anisotropic physics realization mechanism, so the grid-connected microgrid of centralization not only has traditional power grid correlation properties, but also it is micro- to have new energy
Net speciality.The response time of interface inverter protection in delicate rank, load protection, route protection, isolating transformer protection and
The response time of the micro- source protection of energy-storage battery is a millisecond rank, the micro- source protection of gas turbine, the micro- source protection of photovoltaic array and wind-force
Generate electricity micro- source protection response time second grade to minute rank.Based on this, the wide adaptive protection of pipe module 611 of time scale is set
The wide time scale guard method of grade from Microsecond grade to minute, to guarantee each to set safe and stable operation.Wide time scale
Protection is equipped with ten Microsecond grades, hundred Microsecond grade protection act gears, Millisecond and ten Millisecond protection act gears, second grade, minute
Grade and hour grade protection act gear, according to the different protection acts that can be adapted with adaptive configuration for outputing mouthful connecting object
Gear.
Multiple Time Scales control module 612 controls the work of the power output strategy, microgrid in each micro- source of interface inverter
Mode, the adjusting control of microgrid frequency voltage.
As shown in fig. 6, Multiple Time Scales control module 612 and site power coordination module 613 complete distribution jointly
Decline source site power coordination and Multiple Time Scales control.Site power coordination module 613 is according to microgrid central controller
The microgrid off-network that issues and grid-connected instruction, centralization and the micro- source general power output of network interface it is active with idle, voltage, frequency it is distant
Tone pitch, with site acquire concentrate and each interface inverter off the net voltage, electric current real time data, carry out optimize processing with
Coordinated control, obtain minute and when generation schedule, wide time scale control instruction is generated, as Multiple Time Scales observing and controlling mould
The input of block 612 instructs, and final interface inverter executes control operation order.
Multiple Time Scales control module 612 executes interface inverter grading control algorithm, according to the control of wide time scale
Selection or switching that the electronic power switch action command period is Microsecond grade, interface inverter control scheme is set separately in instruction
Instruction is Millisecond, the primary frequency modulation pressure regulation instruction cycle is that second grade, frequency modulation frequency modulation pressure regulation instruction cycle and centralized grid type are micro-
The net operational mode switching command period be minute grade, monomer distribution decline source power output Planning Directive be minute to hour grade.
The instruction that site power coordination module 613 is issued according to microgrid central processing unit counts in real time with interface inverter
According to each interface inverter power output of site coordinated allocation.On the one hand microgrid central controller is received to predict to instruct a few days ago
Value, on the other hand according to concentrating grid-connected distribution to decline the work health data and environmental parameter in source, most by data
Optimization processing and coordinated control calculate each optimal generation scheme in a short time for being distributed the source that declines, and (minute or hour are all for the time
Phase).Other than predicting instruction extremely with optimal generation scheme value in a short time a few days ago, the optimal processing of site power coordination module
With traffic signal coordination unit need to acquire actual instruction control the period as calculate minute, when generation schedule input change
Amount.Based on this, wide time scale control instruction is generated.
Site power coordination module 613 carries out optimizing processing and coordinated control (optimal processing and coordinated control calculation
Method): according to interface inverter style and its site real time data, distribution decline source operating condition, environmental aspect carry out it is data-optimized
Processing, is fitted micro- source dynamic power curve of output, obtains Short Term Generation Schedules.Meanwhile microgrid central controller issues a few days ago
Predict that instruction makes the difference compared with the power output value in total practical micro- source, difference is defeated by proportional integration amplifier generation dynamic power
It is worth out, obtains dynamic power value, then compared with making the difference with the power output curve in each micro- source of interface inverter, final choice difference
The smallest fitting dotted line operating point value, the instruction of the power output value as interface inverter.Based on this, show that distinct interface is inverse
Become job responsibility and power output value in the microgrid in the micro- source of device.
In addition to this, site power coordination module 613 can be set the micro- source operation reserve of each interface inverter and use
Job rotating principle reaches the equity of microgrid working condition.Therefore, centralized grid type microgrid can not only guarantee each connect
The coordination output of mouthful micro- source power of inverter can also allow and entire micro-grid system longer-term and stablize sex work.
Communication management module 614 plays data interaction and management between microgrid central controller and the grid-connected microgrid of centralization
Effect.Communication management module 614 declines in microgrid central controller and distribution and establishes communication connection between source, on the one hand by institute
Have the grid-connected distribution of centralization decline source telemetering and remote signalling information on give microgrid central controller, meanwhile, in reception microgrid
Entreat the remote control and remote regulating instruction of controller；On the other hand to each distribution decline the source remote control that issues of forwarding microgrid central controller and
Remote regulating instruction is collected simultaneously each distribution that sampling and vector calculation module 615 sample and declines the telemetering and remote signalling information in source.It is distant
Survey and remote signalling information are respectively and voltage, electric current real time data and the grid-connected breaker of each interface inverter off the net, load break
The position signal of road device.Remote control and remote regulating instruction respectively grid-connected breaker, the division signal of load break switch and centralization are simultaneously
The micro- source general power output of network interface, active and idle, voltage, frequency
The input and output plate 2 that communication management module 614 is connected through control bus is opened output that processing module 617 generates
Signal is transferred to the breaker of grid-connected breaker and load out, by double mode definite value and its selected difference of parameter processing module 618
Protected object and setting valve be transferred to interface inverter.
Sampling and vector calculation module 615 sample isolating transformer and net side three-phase voltage, electric current and microgrid busbar voltage
Data-signal, information calculates trend value, micro net power quality information between microgrid and major network according to the collected data, and leads to
It crosses in communication management module and send to microgrid central controller.Micro net power quality includes harmonic content, frequency, voltage magnitude.
Open into and the grid-connected breaker of 616 real-time monitoring of remote signalling processing module, load break switch state position signal, pass through
It is sent in communication management module 614 to microgrid central controller.
Output 617 pairs of processing module wide time scale protective modules 611, Multiple Time Scales control module 612, site association
The control signal for adjusting 613 module of control module to generate, the microgrid central controller received through communication management module 614 and aobvious
Show the control command that panel issues, what is generated after being handled outputs signal, transmits control signal, control through input and output plate 2
Grid-connected breaker and load break switch division.The control loop of input and output plate 2 and grid-connected breaker and the breaker of load connects
It connects.
Double mode definite value and its parameter processing module 618 according to open into and remote signalling processing module 616 monitor grid-connected open circuit
The division position of device, determines the operating mode of microgrid, selectes different protected object and setting valve, is then handed down to wide time ruler
Protective module 611 is spent, as its protection act parameter value.
Logging modle 619 records the remote control remote regulating time that microgrid central controller issues, the division behaviour of breaker in microgrid
Make, the change event of the operational mode of interface inverter and parameter.
Voltage, electric current and the power quality of interface display processing module 6110 display sampling and data processing module, interface
The operating mode of inverter and the information of power output situation.
In the present embodiment, power panel 1 uses input rated voltage DC/AC220V, rated power≤50W, input and output plate 2
Interface is outputed using 15 tunnel eight road Kai Ru, AC sampling plate 3 is using 6 road voltage sample channels and 6 road current sample channels, display
Plate 9 is negative to be shown using 4 inch screens, and FPGA uses XINLINXSPARTAN6-XC6SLX150 chip, and ARM uses ARM7TDMI
Chip.Operating system layer uses LINUX, and management system is realized using C# and Verilog2001 program language, general monitoring for protection
Podium level uses C++ program language.
The grid-connected interface adaptive managing device of distributed generation resource based on wide time scale of the invention, on the one hand according to micro-
The adaptive selection protection seting value of net operational mode carries out electric current, voltage, power and frequency protection, on the other hand in protection
Between on domain from Microsecond grade to millisecond again to minute grade, decline source, transformer and load equipment to power electronic equipment, different distributions
Comprehensive cross clock domain protection is carried out, to improve the safety and stability performance of distributed generation resource and other equipment.
Managing device in the present invention, it is inverse according to interface for the microgrid of the grid-connected distributed generation resource composition of centralization
Become device type and its site real time data, be distributed the source operating condition that declines, the data-optimized processing of environmental aspect progress, is fitted On Fluctuations
Source power output services curve obtains micro- source Short Term Generation Schedules.
Managing device in the present invention, optimal processing and traffic signal coordination are according to interface inverter style and in fact
When data, calculate the micro- source optimal working point of each interface inverter and power output boundary Limit value.Meanwhile in conjunction with microgrid center
The control instruction value that controller issues obtains job responsibility and power output value in the microgrid in the micro- source of distinct interface inverter.
In addition to this, the micro- source operation reserve of each interface inverter uses job rotating principle, reaches the equity of microgrid working condition.
Therefore, centralized grid type microgrid can not only guarantee the coordination output of each micro- source power of interface inverter, can also allow whole
A micro-grid system longer-term and stablize sex work.
In the present invention, for different control targets and its response time, gradually distinguish by different level in time scale
Carry out distributed generation resource power output plan control, secondary voltage frequency control/microgrid pattern switching, primary voltage frequency control
The switch motion control of system, interface inverter control Scheme Choice and power electronics.To realize that optimizing coordinated control refers to
The output of order, while enhancing the fault-tolerant ability of equipment and the utilization rate of distributed generation resource.
Claims (10)
1. a kind of grid-connected interface adaptive managing device of distributed generation resource based on wide time scale is equipped with CPU board (6), special
Sign is: the application layer (61) of the CPU board (6) is equipped with wide time scale protective module (611), Multiple Time Scales control module
(612), site coordinating control module (613), communication management module (614), sampling and vector calculation module (615), open into
And remote signalling processing module (616), output processing module (617) and definite value and its parameter processing module (618)；
The width time scale protective module (611) selects protection seting value, from Microsecond grade to minute in the wide time range of grade
It realizes respectively and decline source, a route in micro-grid system, isolating transformer, load and interface inverter of different distributions is carried out
Multi-level protection act；
The operating mode of the power output in the micro- source of Multiple Time Scales control module (612) the control interface inverter, microgrid, it is micro-
The adjusting of net voltage to frequency controls；
The site power coordination module (613) receives microgrid central controller and predicts instruction value a few days ago, grid-connected according to concentrating
Distribution decline the work health data and environmental parameter in source, handled by data optimization calculated with coordinated control it is each
A optimal generation scheme in a short time for being distributed the source that declines generates wide time scale control instruction；
The optimization processing is calculated with coordinated control are as follows: according to interface inverter style and its site real time data, distribution
Source operating condition, the environmental aspect of declining carry out data, are fitted micro- source dynamic power curve of output, obtain Short Term Generation Schedules；Meanwhile it will
The instruction of prediction a few days ago that microgrid central controller issues makes the difference compared with the power output value in total practical micro- source, obtains dynamic power
Value, then compared with being made the difference with the power output curve in each micro- source of interface inverter, the smallest fitting dotted line work of final choice difference
Make point value, the instruction of the power output value as interface inverter；
The communication management module (614) declines in microgrid central controller and distribution and establishes communication connection between source, will be distributed
Decline source telemetering and remote signalling information on give microgrid central controller, while receiving the remote control and remote regulating of microgrid central controller
Instruction；It declines the source remote control that issues of forwarding microgrid central controller and remote regulating instruction to distribution, collects sampling and vector calculates mould
The distribution of block (615) sampling declines the telemetering and remote signalling information in source；
The sampling and vector calculation module (615) sampling isolating transformer and net side three-phase voltage, electric current and microgrid bus electricity
The data-signal of pressure, signal calculates trend value, micro net power quality information between microgrid and major network according to the collected data, leads to
It crosses on communication management module (614) and send to microgrid central controller；
It is described open into and the grid-connected breaker of remote signalling processing module (616) real-time monitoring, load break switch state position signal, lead to
It crosses in communication management module and send to microgrid central controller；
The processing module (617) of outputing is referred to by the remote control that communication management module (614) reception microgrid central controller issues
It enables, generation is corresponding to output signal, carries out closed procedure to the breaker of grid-connected breaker and load；
The definite value and its parameter processing module (618) according to open into and remote signalling processing module (616) monitor grid-connected breaker
Division position, determine the operating mode of microgrid, select different protected object and setting valve, be then handed down to wide time scale
Protective module (611), as its protection act parameter value.
2. the grid-connected interface adaptive managing device of distributed generation resource based on wide time scale according to requiring 1, feature
Be: the width time scale protective module (611) realizes that protection is calculated using O&M scale and two dimensions of time scale；
The O&M scale includes protected object, operational mode and protection type and its setting valve；
The time scale is that ten Microsecond grades, hundred Microsecond grades, Millisecond, ten Milliseconds, second grade, minute grade and hour grade protection are dynamic
Make gear.
3. the grid-connected interface adaptive managing device of distributed generation resource based on wide time scale according to requiring 2, feature
Be: the protected object include interface inverter in microgrid, load, route, isolating transformer, energy-storage battery Wei Yuan, point
Cloth declines source；
The operational mode is divided into island mode and grid-connect mode；
The protection type and its setting valve be island mode and overcurrent protection under grid-connect mode, power protection, overvoltage protection,
Under-voltage protection, carrier current protection and underfrequency protection and its setting valve.
4. the grid-connected interface adaptive managing device of distributed generation resource based on wide time scale according to requiring 1, feature
Be: the Multiple Time Scales control module (612) sets the electronic power switch action command period as Microsecond grade, interface inversion
Device control select or switching command be Millisecond, the primary frequency modulation pressure regulation instruction cycle be the second grade, frequency modulation frequency modulation pressure regulation instruction week
Phase and centralized grid type microgrid operational mode switching command period are that the source power output plan that declines of minute grade, monomer distribution refers to
Enabling is minute to hour grade.
5. the grid-connected interface adaptive managing device of distributed generation resource based on wide time scale according to requiring 4, feature
Be: the site power coordination module (613) generates wide time scale control instruction, as Multiple Time Scales observing and controlling
The input of module (612) instructs.
6. the grid-connected interface adaptive managing device of distributed generation resource based on wide time scale according to requiring 1, feature
Be: the micro- source operation of each interface inverter is arranged using job rotating system in the site power coordination module (613).
7. the grid-connected interface adaptive managing device of distributed generation resource based on wide time scale according to requiring 1, feature
Be: the telemetering and remote signalling information are respectively and the voltage of each interface inverter off the net, electric current real time data and grid-connected disconnected
The position signal of road device, load break switch；The remote control and remote regulating instruction are respectively the division of grid-connected breaker, load break switch
Signal and the micro- source general power output of the grid-connected interface of centralization, active and idle, voltage, frequency.
8. the grid-connected interface adaptive managing device of distributed generation resource based on wide time scale according to requiring 1, feature
Be: the micro net power quality includes harmonic content, frequency, voltage magnitude.
9. the grid-connected interface adaptive managing device of distributed generation resource based on wide time scale according to requiring 1, feature
Be: the grid-connected interface adaptive managing device of the distributed generation resource based on wide time scale is equipped with record processing module
(619) and interface display processing module (6110)；
The logging modle (619) records the remote control remote regulating time that microgrid central controller issues, the division of breaker in microgrid
It operates, the change event of the operational mode of interface inverter and parameter；
Voltage, electric current and the power quality of interface display processing module (6110) the display sampling and data processing module, connect
The mouth operating mode of inverter and the information of power output situation.
10. the grid-connected interface adaptive managing device of distributed generation resource based on wide time scale according to requiring 1, feature
It is: the input and output plate (2) and grid-connected breaker and load disconnected that the communication management module (614) connects through control bus
The control loop of road device connects, and wide time scale protective module (611), Multiple Time Scales control module (612), site are coordinated
Control module (613) module generate control signal, the microgrid central controller received through communication management module (614) and
The control command that display panel issues, that outputs processing module (617) generation outputs signal, simultaneously through input and output plate (2) control
The breaker division of net breaker and load.
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| KR20120093671A (en) * | 2011-02-15 | 2012-08-23 | ㈜코리아에너텍 | Grid-connected generating system with photovoltaic and wind power hybrid generation and generator thereof |
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