CN110112766A - A kind of factory's micro-capacitance sensor black starting-up system and method - Google Patents
A kind of factory's micro-capacitance sensor black starting-up system and method Download PDFInfo
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- CN110112766A CN110112766A CN201910136494.9A CN201910136494A CN110112766A CN 110112766 A CN110112766 A CN 110112766A CN 201910136494 A CN201910136494 A CN 201910136494A CN 110112766 A CN110112766 A CN 110112766A
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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
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The present invention is directed to factory's micro-capacitance sensor, provides a kind of factory's micro-capacitance sensor black starting-up system and method.The micro- source of the micro-capacitance sensor includes photovoltaic array, battery and electric transporting vehicle, and reverse feeding when power grid needs can take as the distributed energy storage unit in micro-capacitance sensor.Energy-storage system, photovoltaic generating system, charging pile and micro-grid load are direct and are connected on micro-capacitance sensor bus.PCC successively by switch, main transformer, is connected to overhead transmission line road, is finally connected with power distribution network.This scheme is factory's micro-capacitance sensor black starting-up under island mode, and the energy-storage units for selecting residual capacity high control self-starting by VSG, and the support of electric transporting vehicle itself electric energy is cooperated to establish micro-grid system voltage.It ensure that voltage and frequency stabilization of factory's micro-grid system under island operation state, energy-storage battery pool-size in microgrid can be reduced and configured, other electric transporting vehicles for having neither part nor lot in black starting-up can be used as emergency duty.
Description
Technical field
The present invention relates to a kind of factory's micro-capacitance sensor black starting-up system and methods, belong to the service restoration technology neck of micro-capacitance sensor
Domain.
Background technique
In recent years, distributed generation technology (distributed generation, DG) is high with its energy utilization rate, installs
Flexibly, the advantages that power supply facilitates, the microgrid being especially made of DG is widely applied in the power system.Micro-capacitance sensor with point
Cloth power supply improves the redundancy of system, can greatly meet the reliable continued power of load in all cases.In 2011
Eastern Japan's violent earthquake and tsunami, when North America hurricane Sandy wreaks havoc, factory's micro-capacitance sensor highlights certain defence capability, not only protects
The power supply for having hindered essential industry equipment during disaster also meets the demand of a part of industrial goods after disaster.In addition to this,
Micro-capacitance sensor is combined with distributed generation resource, energy storage, the controllable electric power system for controlling equipment and load, has faster self-starting energy
Power, reaction speed is rapider, has preferable frequency modulation and voltage modulation ability, increases power supplied locally reliability, improves energy efficiency；And band
There is the microgrid of the formation of gird-connected inverter, bulk power grid can be accessed and be incorporated into the power networks and extreme event can coped with isolated operation,
It ensures and is played a crucial role on critical load.
Micro-capacitance sensor black starting-up, after referring to that bulk power grid is stopped transport because of failure, entire micro-capacitance sensor also enters completely black state of paralysis, no
Dependent on other web helps, by having the self-starting distributed generation resource of frequency modulation, voltage regulation function that nothing is driven to open certainly inside micro-capacitance sensor
Micro- source of kinetic force maintains the voltage and frequency stabilization of micro-capacitance sensor points of common connection, finally realizes that the power supply of independent micro-capacitance sensor is extensive
It is multiple.Bulk power grid structure is sufficiently complex, and micro-capacitance sensor disconnection fault is usually that bulk power grid breaks down or when by big disturbance, non-meter
Isolated island handover failure is drawn to cause.Therefore factory's micro-capacitance sensor, which has off-network condition black starting-up function, can reduce power-off fault to factory's effect
It is lost caused by benefit.
Traditional black-start scheme is mainly for the large-scale power grid containing generator, and micro-grid system focuses mostly in medium/low press-fitting
Power grid, it is composed of DG, energy-storage units, energy conversion device, load and monitoring and protective device.DG fast response time,
But overload capacity and single machine power generation capacity are much smaller than traditional rotating machinery class power supply, and therefore, micro-grid system is difficult directly to continue to use
The black-start scheme of traditional power grid.And what factory's micro-capacitance sensor was focused on is reliability and economy.
Summary of the invention
The object of the present invention is to provide factory's micro-grid system black-start schemes of a set of low-cost high-efficiency benefit.
In order to achieve the above object, there is provided a kind of factory's micro-capacitance sensor black starting-up systems for a technical solution of the invention
System, factory's micro-capacitance sensor are the Guang Chu factory micro-capacitance sensor containing charging pile, which is characterized in that the black starting-up system includes light storage system
Unite matched battery group, photovoltaic array and charging pile, be connected with electric transporting vehicle on charging pile, battery group, photovoltaic array and
Charging pile is direct and is connected on micro-capacitance sensor bus, by battery group as the micro- source of black starting-up, if battery group capacity is unsatisfactory for,
Then the electric transporting vehicle using residual capacity in the connected electric transporting vehicle of charging pile greater than 40% is as the micro- source of black starting-up；
After battery group or electric transporting vehicle starting, the voltage frequency established with reference to battery group or electric transporting vehicle
Rate, photovoltaic array are started.
Preferably, capacity meet condition the battery group or the electric transporting vehicle by VSG control black starting-up, build
The busbar voltage of vertical micro-capacitance sensor.
Preferably, the photovoltaic array works in PQ mode.
Preferably, the direct current side interface of the charging pile uses bi-directional half bridge DC/DC, carries out the liter of battery side DC voltage
Drop transformation；The exchange side interface of the charging pile uses two-way AC/DC link, modulates unsteady flow using voltage-source type pulse width
Device realizes the flowing of DC side power automatic bidirectional.
Another technical solution of the invention there is provided a kind of factory's micro-capacitance sensor black-start method based on above system,
Characterized by comprising the following steps:
All loads and micro battery in step 1, excision micro-grid system；
Step 2 selects black starting-up power supply: preferential the matched battery group of light-preserved system of choosing is as the micro- source offer ginseng of black starting-up
Voltage and frequency are examined, if battery group capacity is unsatisfactory for, detects the connected electric transporting vehicle residual capacity of charging pile, selection is remaining
Electric transporting vehicle of the capacity greater than 40% is as black starting-up power supply；
Step 3, starting black starting-up power supply: selection capacity meets the battery group of condition or electric transporting vehicle passes through VSG and controls
Black starting-up processed establishes the busbar voltage of micro-capacitance sensor, and battery group or electric transporting vehicle not only provide sufficient power generation capacity, and bear
The no-load loss of the short-time rating impact and ac bus of other non-micro- sources of black starting-up during startup in micro-capacitance sensor；
Step 4 judges whether micro-capacitance sensor busbar voltage is established, and criterion is that the frequency shift (FS) of bus output voltage does not surpass
Cross ± 1% ω0, magnitude shift is no more than ± 10%U0, ω0For rated angular velocity, U0For the specified of inverter output end voltage
Value, if being unsatisfactory for condition, otherwise return step 1 enters step 5；
Step 5, the non-micro- source of black starting-up of starting:
First access has pressure regulation, the battery feed of fm capacity and the parallel group net operation of primary reference, to increase only
The power generation capacity of vertical micro-capacitance sensor, so that the voltage of micro-capacitance sensor and frequency obtain stability contorting, photovoltaic cells start in energy-storage units
The electric voltage frequency established later with reference to energy-storage units is started, and photovoltaic cells work in PQ mode；
Step 6 increases micro-capacitance sensor internal loading: by electric network swim and power-balance constraint, the load put into micro-capacitance sensor is needed
Meet:
In formula, SMiAnd SGiRespectively micro-grid system load and source nominal capacity, UGiminAnd UGimaxRespectively node voltage
Amplitude UGiUpper and lower limit, n be micro-grid system interior nodes number, i, j are respectively node serial number, PijFor route active power,
For route active power limits value, Δ f is the frequency departure of system.
Preferably, in step 3, the specified apparent energy of battery group or electric transporting vehicle is Sn, then have:
In formula, SLiFor the no-load loss of i-th of equipment in micro-capacitance alternating current bus, m1To connect
Enter the sum of the equipment of micro-capacitance alternating current bus, SejFor the percussion power of j-th in the micro-capacitance sensor non-micro- source starting of black starting-up, m2For
The sum in the non-micro- source of black starting-up.
The present invention provides a kind of system and method suitable for the Guang Chu factory micro-capacitance sensor containing charging pile, this scheme can drop
Energy-storage battery pool-size configures in humble net, and the support of electric transporting vehicle itself electric energy is cooperated to establish micro-grid system voltage, drives
The starting of microgrid photo-voltaic power supply, ensure that voltage and frequency stabilization of the micro-grid system under island operation state, it is other have neither part nor lot in it is black
The electric transporting vehicle of starting can be used as emergency duty.
Detailed description of the invention
Fig. 1 is factory's micro-capacitance sensor integrated stand composition；
Fig. 2 is the VSG control strategy figure of energy storage inverter；
Fig. 3 is factory's micro-capacitance sensor black-start method flow diagram.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Fig. 1 is factory's micro-capacitance sensor integrated stand composition.The micro- source of the microgrid includes photovoltaic array and battery, and charge transport vehicle
Micro- source can be served as under specific circumstances.Energy-storage battery group unit is flanked in exchange into facilitating expansion capacity.The micro- source of photovoltaic is using double
Grade grid-connect mode.Automobile charging pile direct current side interface uses bi-directional half bridge DC/DC, is substantially carried out the lifting of battery side DC voltage
Transformation；It exchanges side interface and uses two-way AC/DC link, (PWM) current transformer is modulated using voltage-source type pulse width, realizes direct current
The flowing of side power automatic bidirectional.Single electric transporting vehicle battery capacity can be used as distribution up to 70~100kW in micro-capacitance sensor
Energy-storage units, reverse feeding when power grid needs, and the four quadrant running based on voltage-source type PWM converter receive
Electric network active, reactive power instruction, participate in dispatching of power netwoks and increase factory's benefit.The line voltage grade of micro-capacitance alternating current bus is
380V, power distribution network line voltage grade are 10kV, and voltage here is line voltage.Energy-storage system, photovoltaic generating system, charging pile
With micro-grid load directly and be connected on micro-capacitance sensor bus.PCC successively by switch, main transformer, is connected to overhead power transmission
On route, finally it is connected with power distribution network.Main transformer grade is 380V/10kV, and Zline is transmission line of electricity impedance, power distribution network
It is carried out with the voltage source with internal impedance equivalently represented.
Fig. 2 is the VSG control strategy figure of energy storage inverter.Virtual synchronous generator (VSG) control technology is that one kind makes
The power electronic equipments such as flexible AC and DC transmission equipment, renewable energy power generation, electric car, energy storage can simulate similar rotation
The converter Control technology of rotary inertia and damping characteristic possessed by rotating motor.Bottom electricity is divided into the control of energy storage inverter
Current voltage double-closed-loop control and the control of upper layer VSG power ring.Bottom control uses outer voltage and current inner loop, defeated to inverter
Three-phase voltage and electric current out carries out accurate double-closed-loop control, realizes the two-way flow of power；Top level control is using embodiment VSG
The active loop and idle loop of characteristic, realize the control of watt level.Bottom voltage and current is bicyclic to be controlled for traditional V/f,
Controlled volume is filter capacitor voltage uabcWith filter inductance electric current iLabc, while acquiring inverter output current iabc.Upper layer power
Ring is VSG Controlling model, simulates the mechanical property and excitation property of conventional synchronization generator, is equivalent set end voltage uabcIt mentions
Phase reference θ and amplitude reference U are suppliedref。
Active-frequency control:
Active-frequency control of VSG has corresponded to equation of rotor motion of the synchronous generator when number of pole-pairs is 1:
In formula, δ is the difference of the phase of VSG and bulk power grid voltage, referred to as generator rotor angle；ω0It is general to be believed that for rated angular velocity
Angular speed equal with power grid angular speed, i.e. under 50Hz；ω is the mechanical angular speed of VSG, and when number of pole-pairs is 1, as it is electrical
Angular speed；J is the virtual inertia of VSG；Tref、TeAnd TdThe respectively machine torque of VSG, electromagnetic torque and damping torque；D is resistance
Buddhist nun's coefficient；PrefAnd PeThe respectively mechanical output of VSG and electromagnetic power.Wherein PeExpression formula be shown below:
Pe=uaia+ubib+ucic (2)
By formula (1) available VSG it is active-frequency control fundamental equation:
The expression formula in the domain s is converted by the differential term in formula (3), and enables Δ ω=ω-ω0, following formula can be obtained:
Formula (3) is the active-frequency expression introduced after virtual inertia and damping, it can be seen that when system frequency changes
When, due to the effect of inertia and damping, changes from main response, so that frequency automatically restores to rated value, embody primary frequency modulation
Effect.
Meanwhile for the frequency modulation frequency modulation that the micro- source for controlling VSG participates in system, system frequency is supported, institute
Sagging control to be usually added in active-frequency control link, when system frequency variation, active power is adjusted accordingly
Given instruction so that system frequency stablize in rated value.The expression formula of its sagging control are as follows:
In formula, P0For given rated active power；KpFor the sagging coefficient of active power.
From formula (5) as can be seen that system frequency and active power are inversely proportional, when system frequency rises, active power is defeated
Decline out；When system frequency decline, active power output rises.Compared with the vector controlled of conventional inverter, VSG control exists
Virtual inertia, damping and sagging control are increased in active power-frequency loop, when system frequency is changed
From its variation of main response, guarantee the stable operation of system.
Idle-voltage control:
Idle-voltage control of VSG simulates synchronous generator excited system to the control characteristic of set end voltage.In VSG
In pass through virtual potential (U i.e. hereinafterref) adjust reactive power.In traditional sagging control, digital ratio equation system is generally used
For number to embody the sagging relationship between reactive power and set end voltage, expression formula is as follows:
Uref=U0+Kq(Qref-Qe) (6)
In formula, UrefFor set end voltage, i.e. inverter output end voltage (provides voltage for bottom Voltage loop control above
Reference value)；U0For the rated value (being generally regarded as network voltage) of inverter output end voltage；For the sagging system of reactive power
Number；QrefAnd QeRespectively reactive power reference qref and real output value.
This traditional control mode is a kind of Reactive Power Control mode for having difference, it is difficult to meet VSG control micro battery
Control target when grid-connected.So introducing PI controller herein to realize VSG to the zero steady state error control of reactive power, in formula (6)
On the basis of improve expression formula it is as follows:
In formula, kpqAnd kiqRespectively the proportionality coefficient and integral coefficient of PI controller, s are multifrequency domain variable.
By detecting reactive power reference qref QrefWith real output value QeBetween deviation, carry out PI control, obtain voltage
Compensation rate, then superposition load voltage value obtains the set end voltage of VSG control, i.e. virtual potential on this basis.Wherein QeTable
Up to shown in formula such as formula (8):
In order to improve the accuracy of control, in UrefIt is preceding to add uabcThe a reference value of peak value and the difference of actual value, and carry out PI
Control.Then formula (7) becomes:
In formula, kpAnd kiThe respectively proportionality coefficient and integral coefficient of PI controller, UmnFor uabcThe a reference value of peak value, UmFor
uabcThe actual value of peak value.
Fig. 3 is factory's micro-capacitance sensor black-start method flow diagram.
Step 1: bulk power grid breaks down, and micro-capacitance sensor enters island mode not in time, if micro-capacitance sensor monitoring system detects
Enter full black state to micro-capacitance sensor power-off, then should run the power supply of black starting-up program recovery in time.It is completely black to judge that micro-capacitance sensor has entered
State is primary link, and basic judgment criteria is that each electrical equipment of micro-capacitance sensor does not damage but micro-capacitance sensor busbar voltage is zero.
Step 2: after micro-grid system is stopped transport, should initialize and avoid black starting-up procedure failure.In black starting-up
At initial stage, load is excessive easily to cause DG disorderly closedown situation, to avoid such phenomenon generation that from can carrying out following initialization operation: disconnected
Breaker at point of common coupling is opened, mode decision mistake causes not synchronize grid-connected when preventing DG from starting, and causes rush of current；Cutting
All loads avoid load excessive, DG off-capacity in start-up course and cause starting fail；Whole DG shut down and remove failure
Information prepares sequentially Leie time starting.
Step 3: micro-capacitance sensor management system detects the matched battery of photovoltaic and the battery remaining power in stake electric transporting vehicle,
Selection capacity meets burden requirement, fast response time, the self-starting under VSG control of the good energy-storage units of frequency modulation and voltage modulation performance.It is logical
Often being selected as the micro- source of black starting-up should meet:
In formula, SLiFor the no-load loss of i-th of equipment in micro-capacitance alternating current bus, m1For access micro-capacitance alternating current bus
The sum of equipment, SejFor the percussion power of j-th in the micro-capacitance sensor non-micro- source starting of black starting-up, m2For the total of the micro- source of non-black starting-up
Number.
It specifically pays the utmost attention to whether the matched battery of light-preserved system meets self-starting condition, is then controlled in VSG if meeting
Lower quick start is made, the busbar voltage of micro-capacitance sensor is established, guarantees voltage and frequency stabilization when piconet island operation.Light-preserved system
After matched battery self-starting, by presynchronization device complete synchronization paralleling make electric transporting vehicle and battery voltage magnitude,
Frequency is synchronous with phase angle.If the matched remaining battery capacity of light-preserved system is unsatisfactory for condition, charging pile control algolithm is adjusted, benefit
The busbar voltage for establishing micro-capacitance sensor to micro-capacitance sensor feed with electric transporting vehicle, it is common to be finally incorporated to the matched battery of light-preserved system again
Necessary frequency and voltage support are provided for independent micro-capacitance sensor.
Step 4: judging whether micro-capacitance sensor busbar voltage is established, criterion is that the frequency shift (FS) of bus output voltage does not surpass
Cross ± 1% ω0, magnitude shift is no more than ± 10%U0.If being unsatisfactory for condition, initialization operation is reentered, is cut off all negative
Lotus and Wei Yuan；If busbar voltage is it has been established that starting frequency modulation and voltage modulation algorithm.Micro-capacitance sensor re-establishes still unstable, should first start
Frequency modulation and voltage modulation algorithm, then it is sequentially ingressed into photovoltaic generation unit and load, avoid load is excessive from causing frequency, voltage are larger to fall.
Step 5: according to the photovoltaic power generation capacity of weather condition at that time and the significance level of load, being sequentially ingressed into load and light
Lie prostrate unit.During black starting-up, factory's micro-grid system adjusts photovoltaic generation power by the reasonable charge and discharge of energy-storage battery
Unbalanced supply-demand caused by fluctuation and load variations, maintains the safe and stable operation of whole system.Between power supply and load
Active power balance expression formula are as follows:
Ppv+PES-PLoad-Pbs-Pm=0 (11)
In formula, PpvFor photovoltaic active power output, PESFor energy storage active power output, PLoadFor system burden with power demand, PbsFor electricity
Burden with power needed for net black starting-up, PmFor system active loss.
Under the conditions of black starting-up, battery only issues active as black starting-up power supply when photovoltaic cells operate normally at this time
Power is not involved in system frequency modulation.Photovoltaic cells run on unity power factor at this time, and only energy-storage system balance system difference is run
Reactive power under mode maintains system voltage stable operation.Reactive power equilibrium expression formula between power supply and load are as follows:
Qpv+QES-QLoad-Qbs-Qm=0 (12)
In formula, QpvFor the output of photovoltaic cells reactive power, QESFor the output of energy-storage system reactive power, QLoadFor System Reactive Power
Workload demand, QbsFor load or burden without work needed for power grid"black-start", QmFor System Reactive Power loss.
Wherein, photovoltaic cells generated energy and load activity relation mainly have following four situation:
A. photovoltaic power output is greater than workload demand, and energy storage SOC < SOCmax, SOCmaxFor energy-storage battery carrying capacity upper limit value, this
When energy storage there are also enough remaining charging capacitys, photovoltaic DC/DC converter can work in MPPT mode, and dump power passes through whole
Current circuit charges to battery or electric transporting vehicle, i.e. PES < 0, meets black starting-up condition；
B. photovoltaic power output is greater than workload demand, and energy storage SOC > SOCmax, at this time battery storage electric energy have reached the upper limit
Value, overshoot state will be reached by continuing charging, injured larger to battery while being also resulted in unbalanced power, so as to cause
Black starting-up failure, therefore photovoltaic DC/DC converter need to work in MPPT and Steam Generator in Load Follow coordinated control mode, undertaken by energy storage and be
System power loss, i.e. PES >=0, stored energy capacitance needed for reducing can be avoided black starting-up failure simultaneously；
C. photovoltaic power output is less than workload demand, and energy storage SOC > SOCmin, SOCminFor energy-storage battery carrying capacity lower limit value, this
When energy storage discharge remaining capacity, photovoltaic DC/DC converter be in MPPT mode, energy storage electric discharge supplemental capacity vacancy, i.e. PES > 0,
Meet black starting-up condition；
D. photovoltaic power output is less than workload demand, and energy storage SOC < SOCmin, i.e. PES≤0 needs cut-out load at this time,
To guarantee important load uninterrupted power supply.
Step 6: load being accessed, is divided into main load (most important) and secondary load (relatively important) by significance level.
Wherein main load LD0Priority highest accesses first when micro- source generated energy is enough；Then random number volume is carried out to secondary load
Number, boot sequence is LS1 > LS2 > LS3, can cause photovoltaic cells can not to avoid secondary load is excessive using random number number
Meeting entry condition can not start always.
It should be noted that station-service asynchronous motor needs band to carry starting, the too fast growth of load may cause motor and open
Dynamic failure declines to a great extent with frequency, so station-service asynchronous motor institute on-load should be gradually slow with the increase of motor speed
Increase, i.e.,PbsFor burden with power needed for power grid"black-start", VRotor_speedFor motor speed.
The present invention is directed to factory's micro-capacitance sensor, provides a kind of system suitable for the Guang Chu factory micro-capacitance sensor containing charging pile and side
Method, this scheme can reduce energy-storage battery pool-size in microgrid and configure, and the support of electric transporting vehicle itself electric energy is cooperated to establish microgrid
System voltage drives the starting of microgrid photo-voltaic power supply, ensure that voltage and frequency stabilization of the micro-grid system under island operation state,
Other electric transporting vehicles for having neither part nor lot in black starting-up can be used as emergency duty.
The micro- source of the microgrid includes photovoltaic array and battery, and charging transport vehicle can serve as micro- source under specific circumstances.Storage
Can battery assembly module flank in exchange into facilitating expansion capacity.The micro- source of photovoltaic uses twin-stage grid-connect mode.Automobile charging pile direct current
Side interface uses bi-directional half bridge DC/DC, is substantially carried out the lifter change of battery side DC voltage；Side interface is exchanged using two-way
AC/DC link modulates (PWM) current transformer using voltage-source type pulse width, realizes the flowing of DC side power automatic bidirectional.
The matched battery of light-preserved system and charging transport vehicle booting-self controller are virtual synchronous generator (VSG) control, it
It is that one kind makes the power electronic equipments such as flexible AC and DC transmission equipment, renewable energy power generation, electric car, energy storage can be with mould
Draw up the converter Control technology of rotary inertia and damping characteristic possessed by similar rotating electric machine.VSG is controlled in black starting-up mistake
System pressure regulating and frequency modulation are realized in journey, provide necessary frequency and voltage support for independent micro-capacitance sensor；It is worked normally in micro-capacitance sensor
In the case of, charging interface equivalent control is synchronous motor, simulates the spy that output impedance that synchronous motor has is big and inertia is big
Point, can automatically make it have interacted between power grid, the Premium Features such as Demand Side Response, realize the information exchange with power grid
With the two-way exchange of energy, the schedulability of micro- source power generation is improved.
Micro-capacitance sensor management system detects the matched battery of photovoltaic and the battery remaining power in stake electric transporting vehicle, and selection is held
Amount meets burden requirement, fast response time, the self-starting under VSG control of the good energy-storage units of frequency modulation and voltage modulation performance.It is usually selected
Making the micro- source of black starting-up should meet
It specifically pays the utmost attention to whether the matched battery of light-preserved system meets self-starting condition, is then controlled in VSG if meeting
Lower quick start is made, the busbar voltage of micro-capacitance sensor is established, guarantees voltage and frequency stabilization when piconet island operation.Light-preserved system
After matched battery self-starting, by presynchronization device complete synchronization paralleling make electric transporting vehicle and battery voltage magnitude,
Frequency is synchronous with phase angle.If the matched remaining battery capacity of light-preserved system is unsatisfactory for condition, charging pile control algolithm is adjusted, benefit
The busbar voltage for establishing micro-capacitance sensor to micro-capacitance sensor feed with electric transporting vehicle, it is common to be finally incorporated to the matched battery of light-preserved system again
Necessary frequency and voltage support are provided for independent micro-capacitance sensor.
Judge whether micro-capacitance sensor busbar voltage is established, criterion be bus output voltage frequency shift (FS) be no more than ±
1% ω0, magnitude shift is no more than ± 10%U0.If being unsatisfactory for condition, reenter initialization operation, cut off whole loads and
Micro- source；If busbar voltage is it has been established that starting frequency modulation and voltage modulation algorithm.Micro-capacitance sensor re-establishes still unstable, should first start frequency modulation
Pressure regulation algorithm, then it is sequentially ingressed into photovoltaic generation unit and load, avoid load is excessive from causing frequency, voltage are larger to fall.
Claims (6)
1. a kind of factory's micro-capacitance sensor black starting-up system, which is the Guang Chu factory micro-capacitance sensor containing charging pile, feature
It is, the black starting-up system includes the matched battery group of light-preserved system, photovoltaic array and charging pile, is connected with electricity on charging pile
Dynamic transport vehicle, battery group, photovoltaic array and charging pile are direct and are connected on micro-capacitance sensor bus, are opened by battery group as black
Micro- source is moved, it is if battery group capacity is unsatisfactory for, residual capacity in the connected electric transporting vehicle of charging pile is electronic greater than 40%
Transport vehicle is as the micro- source of black starting-up；
After battery group or electric transporting vehicle starting, with reference to the electric voltage frequency that battery group or electric transporting vehicle are established,
Photovoltaic array is started.
2. a kind of factory's micro-capacitance sensor black starting-up system as described in claim 1, which is characterized in that capacity meets the described of condition
Battery group or the electric transporting vehicle establish the busbar voltage of micro-capacitance sensor by VSG control black starting-up.
3. a kind of factory's micro-capacitance sensor black starting-up system as described in claim 1, which is characterized in that the photovoltaic array works in
PQ mode.
4. a kind of factory's micro-capacitance sensor black starting-up system as described in claim 1, which is characterized in that the DC side of the charging pile
Interface uses bi-directional half bridge DC/DC, carries out the lifter change of battery side DC voltage；The exchange side interface of the charging pile uses
Two-way AC/DC link modulates current transformer using voltage-source type pulse width, realizes the flowing of DC side power automatic bidirectional.
5. a kind of factory's micro-capacitance sensor black-start method based on system described in claim 1, which is characterized in that including following step
It is rapid:
All loads and micro battery in step 1, excision micro-grid system；
Step 2 selects black starting-up power supply: preferential the matched battery group of light-preserved system of choosing is provided as the micro- source of black starting-up with reference to electricity
Pressure and frequency detect the connected electric transporting vehicle residual capacity of charging pile if battery group capacity is unsatisfactory for, and select residual capacity
Electric transporting vehicle greater than 40% is as black starting-up power supply；
Step 3, starting black starting-up power supply: choose capacity meet the battery group of condition or electric transporting vehicle controlled by VSG it is black
The busbar voltage of micro-capacitance sensor is established in starting, and battery group or electric transporting vehicle not only provide sufficient power generation capacity, and bear micro- electricity
The no-load loss of the short-time rating impact and ac bus of other non-micro- sources of black starting-up during startup in netting；
Step 4 judges whether micro-capacitance sensor busbar voltage is established, criterion be bus output voltage frequency shift (FS) be no more than ±
1% ω0, magnitude shift is no more than ± 10%U0, ω0For rated angular velocity, U0For the rated value of inverter output end voltage, if
It is unsatisfactory for condition, then return step 1, otherwise enters step 5；
Step 5, the non-micro- source of black starting-up of starting:
First access has pressure regulation, the battery feed of fm capacity and the parallel group net operation of primary reference, to increase independent micro-
The power generation capacity of power grid, so that the voltage of micro-capacitance sensor and frequency obtain stability contorting, photovoltaic cells are after energy-storage units starting
The electric voltage frequency established with reference to energy-storage units is started, and photovoltaic cells work in PQ mode；
Step 6 increases micro-capacitance sensor internal loading: by electric network swim and power-balance constraint, the load put into micro-capacitance sensor needs to meet:
In formula, SMiAnd SGiRespectively micro-grid system load and source nominal capacity, UGiminAnd UGimaxRespectively node voltage amplitude
UGiUpper and lower limit, n be micro-grid system interior nodes number, i, j are respectively node serial number, PijFor route active power,For line
Road active power limits value, Δ f are the frequency departure of system.
6. a kind of factory's micro-capacitance sensor black-start method as claimed in claim 5, which is characterized in that in step 3, battery group or
The specified apparent energy of electric transporting vehicle is Sn, then have:
In formula, SLiFor the no-load loss of i-th of equipment in micro-capacitance alternating current bus, m1To access micro- electricity
The sum of the equipment of net ac bus, SejFor the percussion power of j-th in the micro-capacitance sensor non-micro- source starting of black starting-up, m2It black is opened to be non-
Move the sum in micro- source.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542851A (en) * | 2020-11-23 | 2021-03-23 | 南方电网调峰调频发电有限公司 | Black start circuit and charge-discharge pile of power grid |
| CN113991731A (en) * | 2021-09-14 | 2022-01-28 | 中国大唐集团科学技术研究总院有限公司华东电力试验研究院 | Black start method for energy storage system of large gas turbine |
| CN115207945A (en) * | 2022-03-08 | 2022-10-18 | 浙江大学 | Variable-proportion-coefficient coordination control method based on fan and stored energy residual regulation energy |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104281977A (en) * | 2013-07-10 | 2015-01-14 | 北京中电建投微电网科技有限公司 | Hybrid microgrid application platform and control method theref |
| CN104882906A (en) * | 2015-05-04 | 2015-09-02 | 华电电力科学研究院 | Distributed micro-grid black-start control system and method based on photovoltaic and energy storage |
| CN105262131A (en) * | 2015-10-22 | 2016-01-20 | 华南理工大学 | Black-start system and black-start method applicable to light storage micro grid |
| CN105305495A (en) * | 2015-11-12 | 2016-02-03 | 国网山西省电力公司电力科学研究院 | Dispatching method for multi-energy complement micro-grid system |
| CN106356892A (en) * | 2016-10-14 | 2017-01-25 | 易事特集团股份有限公司 | Microgrid black-start method |
| CN106451443A (en) * | 2016-11-23 | 2017-02-22 | 国网浙江省电力公司电动汽车服务分公司 | Electric power system recovering method for centralized electric vehicle charging station |
| CN106712092A (en) * | 2017-01-25 | 2017-05-24 | 上海电气分布式能源科技有限公司 | System with function of black start, and black start method |
| CN107104439A (en) * | 2017-05-17 | 2017-08-29 | 东北大学 | The mixing micro-grid system and control method of a kind of many direct current subnets of band |
| CN109066799A (en) * | 2018-09-25 | 2018-12-21 | 哈尔滨工业大学 | A kind of micro-capacitance sensor black starting-up system and method suitable for being stored up containing light |
-
2019
- 2019-02-25 CN CN201910136494.9A patent/CN110112766A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104281977A (en) * | 2013-07-10 | 2015-01-14 | 北京中电建投微电网科技有限公司 | Hybrid microgrid application platform and control method theref |
| CN104882906A (en) * | 2015-05-04 | 2015-09-02 | 华电电力科学研究院 | Distributed micro-grid black-start control system and method based on photovoltaic and energy storage |
| CN105262131A (en) * | 2015-10-22 | 2016-01-20 | 华南理工大学 | Black-start system and black-start method applicable to light storage micro grid |
| CN105305495A (en) * | 2015-11-12 | 2016-02-03 | 国网山西省电力公司电力科学研究院 | Dispatching method for multi-energy complement micro-grid system |
| CN106356892A (en) * | 2016-10-14 | 2017-01-25 | 易事特集团股份有限公司 | Microgrid black-start method |
| CN106451443A (en) * | 2016-11-23 | 2017-02-22 | 国网浙江省电力公司电动汽车服务分公司 | Electric power system recovering method for centralized electric vehicle charging station |
| CN106712092A (en) * | 2017-01-25 | 2017-05-24 | 上海电气分布式能源科技有限公司 | System with function of black start, and black start method |
| CN107104439A (en) * | 2017-05-17 | 2017-08-29 | 东北大学 | The mixing micro-grid system and control method of a kind of many direct current subnets of band |
| CN109066799A (en) * | 2018-09-25 | 2018-12-21 | 哈尔滨工业大学 | A kind of micro-capacitance sensor black starting-up system and method suitable for being stored up containing light |
Non-Patent Citations (2)
| Title |
|---|
| 北京：北京交通大学出版社: "《主动配电网中的电力电子技术》", 31 January 2015 * |
| 蔡旭, 上海：上海交通大学出版社 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112542851A (en) * | 2020-11-23 | 2021-03-23 | 南方电网调峰调频发电有限公司 | Black start circuit and charge-discharge pile of power grid |
| CN113991731A (en) * | 2021-09-14 | 2022-01-28 | 中国大唐集团科学技术研究总院有限公司华东电力试验研究院 | Black start method for energy storage system of large gas turbine |
| CN113991731B (en) * | 2021-09-14 | 2023-11-28 | 广东大唐国际肇庆热电有限责任公司 | Black-start method for large-scale gas turbine energy storage system |
| CN115207945A (en) * | 2022-03-08 | 2022-10-18 | 浙江大学 | Variable-proportion-coefficient coordination control method based on fan and stored energy residual regulation energy |
| CN115207945B (en) * | 2022-03-08 | 2024-01-26 | 浙江大学 | Variable proportion coefficient coordination control method based on fan and energy storage residual adjustment energy |
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Application publication date: 20190809 |