CN105529712B - Integrated design microgrid control method is matched somebody with somebody in one kind storage - Google Patents
Integrated design microgrid control method is matched somebody with somebody in one kind storage Download PDFInfo
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Abstract
Match somebody with somebody integrated design microgrid control method the invention discloses one kind storage.It realizes active, the idle balance Control Scheme of connected microgrid group to be distributed in the energy storage array in each microgrid as core control object, and it is concretely comprised the following steps：Under networking and net state, calculated by energy management module and exchange power definite value and distribute to each microgrid control module；Each microgrid control module can independently be maintained under isolated network state net internal power balance, and with energy management module cooperative achievement networking and net state under each distributed generation unit definite value distribute.The present invention realizes that power mutually helps between the neighbouring microgrid supported without outer network source by low-voltage and medium voltage two-stage distribution, improves microgrid operational reliability；Enable microgrid continuous electromigration between various working, the balance of automatic holding generating electric power improves the quality of power supply, meets safety utilization of electric power requirement.The clean electric power generation resource such as wind, light is maximally utilized, is minimized using oily electricity to reduce the pollution to environment.
Description
Technical field
The invention belongs to miniature distribution network technology field, and in particular to Integral design Miniature power grid control side is matched somebody with somebody in one kind storage
Method.
Background technology
In the miniature power distribution network of isolated operation access distributed wind, photovoltaic generation unit, can raising energy the feature of environmental protection,
Solve the problems, such as to depend on pollution and the high cost enterprise that diesel generation brings unduly.But at the same time, between user faces generated output
Have a rest, the problem that the quality of power supply is not high.Can alleviate above mentioned problem by adding energy-storage units, but easily because of wind, light generated energy or storage
Energy off-capacity, energy-storage units are broken down and lead to not to user's reliable power supply, and frequent starting oil electric unit is then used with reduction
The purpose of electric cost is disagreed, while problem of environmental pollution also cannot be solved thoroughly.
Power distribution network in power network access conditions preferably area typically all possesses the ability of connection power transmission network, can be via distribution
Net, is supplied using the electricity consumption economy of the generating capacity raising Miniature power grid user of distant place power supply, in distribution network failure or electric power
Realize that power is supported, absorbs electricity superfluous in power distribution network when needing unbalance.But the overwhelming majority of electricity is transmitted in domestic power transmission network
Coal fired power generation is still derived from, carbon emission amount is huge.The a high proportion of technology for accessing renewable energy power generation in large-scale power transmission network
It is still immature, it is difficult in a short time, and be unfavorable for the realization early of national energy-saving emission reduction targets.
The content of the invention
To overcome the shortcoming of above-mentioned technology, the present invention is intended to provide one kind is stored up with coordinating external power source and multiple oil containing scene
Miniature power distribution network, realize between various running statuses constantly electromigration, be automatically obtained net between and net in generating electric power balance,
Wind, light distributed clean electric power generation unit are maximally utilized, realizes not increasing the dynamic of distribution network transform investment using stored energy capacitance
State increase-volume, power distribution network reality is interconnected in the key element failure situation such as user's Peak power use, energy storage using low-voltage and medium voltage two-stage
Existing power mutually helps, and improves electricity consumption reliability, economy, the miniature distribution network system of the feature of environmental protection.
In order to solve the above technical problems, the present invention is realized using following technical scheme：
Integral design Miniature power grid control method is matched somebody with somebody in one kind storage, specifically includes procedure below：
When using, by closing the disconnect switch of pressure and low-voltage alternating-current net in connection, in low pressure（Refer in particular to 380-420V）
The miniature power distribution network of integrated design is matched somebody with somebody in partial storage（Hereinafter referred to as microgrid）Networking operation can be realized；Otherwise the microgrid enters
Isolated power grid.When in networking operation state, if the disconnect switch at closure points of common connection, makes the described of networking operation
Microgrid is again by middle pressure（Refer in particular to 10kV）AC network and extraneous power transmission network and power supply（Hereinafter referred to as outer network source）It is connected, then
The microgrid enters grid-connected state.If microgrid of the multiple in networking or grid-connected state is connected by power distribution network,
Then merge and be referred to as the microgrid group that is connected.The maximum electric discharge general power P of energy storage array in the microgridDShould be not less than all exchanges in net
The maximum electricity consumption general power P of loadM.To reduce the utilization to oily electric unit, the maximum electricity of energy storage array storage should be not less than 1
The load power consumption in individual plan intranet and extranet power failure cycle.Ensure that the long-time under the conditions of isolated network is powered, oil electricity in the microgrid
1 cycle of unit（Such as 1 typical day）Generated energy（Rated power POWith the product of cycle duration）No less than in the cycle
The power consumption of load.Meanwhile, if the outer network source according to schedule exert oneself by active accommodation, referred to as " external source is adjusted in agreement
It is whole "；Otherwise it is referred to as " the outer external source adjustment of agreement ".
Be control it is above-mentioned it is grid-connected, networking or isolated power grid state under microgrid, according to " nearby mutually Ji, grid-connected charging, scene
Oil storage is dispatched successively " for target implements the whole network active balance control strategy, by the power-balance demand reality of the connected microgrid group
When be assigned to each distributed power generation element.
Energy management module be responsible for the active power of the connected microgrid group mutually the monitoring of Ji and medium pressure AC network and
Protection, while keeper is monitored by energy therein observes the whole network ruuning situation with display module, sends scheduling and control refers to
Order, the control to the whole network disconnect switch is realized by topological control module.The time interval of Δ t is often crossed, by energy management mould
Network control information module collects each microgrid generating, electric power in the outer net generated output information, the connected microgrid group in block
Information and network topological information.Above- mentioned information is not only to pipe by way of energy monitoring and display module are with numeral and figure
Reason person shows that its result is also fed into power and mutually helps module.
The power mutually helps module according to the incoming information of the network control information module, and institute is calculated according to following rule
State the exchange power definite value of connected each net of microgrid group：
1）Simultaneously will first be divided into agreement external source non-adjustment period and multiple agreement external source adjustment periods by net state, be supervised by the energy
Control increases and decreases agreement external source adjustment period and sets the information such as its beginning and ending time, adjustment power with display module：
1.1）In agreement external source non-adjustment period, to any microgrid in the connected microgrid group, met by the outer network source
The electricity consumption of each microgrid load and the energy storage array charge requirement, wind light generation power are still preferentially utilized, specially：It exchanges power
Definite value PT(negative value represents the power for flowing into microgrid) takes-PCWith the absorbable power P of maximumAIn higher value；PCFor the microgrid is exchanged
The maximum of transformer is by capacity, PAEqual to-(PL+PR-PW), wherein PLIt is whole AC load real total power, P in netWFor
Whole wind, light are exerted oneself reference value sum, P in netRFor the maximum of energy storage array in net can use charging general power（The energy storage having been filled with
It is 0 that array power is accrued）；
1.2）In agreement external source adjustment period, when the outer network source is insufficient for whole electricity consumptions, charge requirement, ratio is waited
Example reduces the exchange power of each microgrid；Simultaneously adjustment period progressively delivered power adjustment amount to slow down the impact to the quality of power supply,
Adjusted upward if power（I.e. outer network source increases supply）, the work(that energy storage array sends should be progressively reduced within adjustment period
Rate；If instead for power is adjusted downwards（I.e. outer network source reduces supply）, energy storage array hair should be stepped up within adjustment period
The power for going out, specific method of adjustment includes but is not limited to following linear adjusting methods：According to when m- power planes on（When current
Carve, current outer net power）、（Finish time adjustment period, power after adjustment）2 lines, take the power at correspondence moment on straight line
As outer net power definite value PX；If PXMore than the G of all microgridsiValue sum, then by PXIt is set to the G of all microgridsiValue sum,
GiFor-PCWith the absorbable power P of maximumAIn higher value；To any microgrid in the connected microgrid group（It is following to be represented with symbol i
Concerned enumerates individuality）, it exchanges power definite value PTEqual to weight coefficient WiWith PXProduct, wherein WiTake GiDivided by all micro-
The G of netiValue sum；
2）Under networking state, to any microgrid, P in the connected microgrid groupTCalculated according to following rule：
2.1）When calculating for the 1st time, the unbalanced power amount of each microgrid is obtained：
2.1.1）If the disconnect switch closure of connection wind, light, oily electric unit and inversion unit, and wind, light, oil electricity are most
Big exerting oneself overloads, i.e. PW+PO >PL+ε（ε is sufficiently small positive number）When, PT0 is set to, while it is auxiliary to set imbalance power
It is P to help variable Δ PW+PO-PLAnd PCAmong smaller value；
2.1.2）If connection wind, light, oily electric unit are closed with the disconnect switch of the inversion unit, and wind, light, oil
EIAJ is not more than load, i.e. PW+PO ≤PLDuring+ε, PTP is disposed as with Δ PW+PO-PLWith-PCAmong higher value；
2.1.3）If connection wind, light, oily electric unit are not closed with the disconnect switch of the inversion unit, and the storage
Energy array maximum discharge power is more than load, i.e. PD>PLDuring+ε, PT0 is set to, Δ P is set to PD-PLAnd PCAmong it is smaller
Value；
2.1.4）If connection wind, light, oily electric unit are not closed with the disconnect switch of the inversion unit, and the storage
Energy array maximum discharge power is not more than load, i.e. PD≤PLDuring+ε, PTP is disposed as with Δ PD-PLWith-PCAmong it is larger
Value；
2.2）The 2nd time calculate when, realize each microgrid unbalanced power amount possess mutually Ji condition neighbouring microgrid dividing
Match somebody with somebody：
2.2.1）If need to outwards seek power mutually to help, i.e. Δ P<During-ε, Δ=- Δ P is remembered, read mutually Ji queue（Each is micro-
Net mutual Ji queue simultaneously differ, by keeper according to nearby mutually Ji principle set in advance, generally according to electrical distance or other
Determine that the index of network loss is arranged by the order of network loss when being more beneficial for reducing mutually Ji）, according to queue order, to any for traversing
Microgrid in queue, according to following rules modification PT：
2.2.1.1）If microgrid possesses the ability that power mutually helps that is provided out to traversal in one's power, but supply is not more than demand
When, i.e. Δ P>When ε and Δ P≤Δ, Δ P is added to PT, Δ is set to Δ-Δ P, and Δ P is set to 0；
2.2.1.2）If microgrid possesses the ability that power mutually helps that is provided out to traversal in one's power, but when feeding more than demand,
That is Δ P>ε and Δ P>During Δ, Δ is added to PT, Δ is set to 0, and Δ P is set to Δ P- Δs；
2.2.1.3）If traversal terminates and Δ>ε, is monitored by the energy and shows unbalanced power with display module
Warning information, reminds keeper to take manual control measure；
3）Under isolated network state, to the microgrid, PT0 is set to, and is calculated as below：
3.1）If connection wind, light, oily electric unit are closed with the disconnect switch of the inversion unit, and wind, light, oil are most
Exert oneself less than load, i.e. P greatlyW+PO <PLDuring-ε, unbalanced power warning information is shown by the energy management module, reminded
Keeper takes manual control measure；
3.2）If connection wind, light, oily electric unit are not closed with the disconnect switch of the inversion unit, and the energy storage
Array maximum discharge power is less than load, i.e. PD<PLDuring-ε, show that unbalanced power alerts letter by the energy management module
Breath, reminds keeper to take manual control measure；
The power mutually helps the exchange power definite value P of each microgrid in the described connected microgrid group that module will be calculatedT
Feeding described information bus.
If additionally, in networking or when simultaneously net state, the outer network source are not stopped power supply, the energy management module
Interior Phase synchronization module obtains the phase signal of alternating voltage from medium pressure exchange measurement unit.If the outer network source
Stop power supply, when periphery power transmission network has a power failure, the Phase synchronization module is by the use of the industrial frequency AC signal for itself producing as described
The phase signal of inversion unit.The signal is used for the phase of each microgrid inversion unit of the synchronous connected microgrid group.When by described
When Phase synchronization module produces phase signal, the phase signal from the outer network source is received as starting point with last 1 time, produce
Raw industrial frequency AC signal and its phase signal.
Protection control module in the energy management module is responsible for monitoring medium pressure AC network and the outer network source
All kinds of voltages, the unusual fluctuations of frequency, if exchange voltage, electric current, frequency that measurement unit obtains by medium pressure exceeding
Safety limit, then disconnect each microgrid and exchanged with medium pressure by disconnect switch control module in the energy management module
The switch of net, implements protection；Meet safety requirements when the voltage of measurement unit acquisition, frequency is exchanged by medium pressure, then lead to
Cross the switch of each microgrid of disconnect switch control module closure connection and medium pressure AC network in the energy management module.
The microgrid control module is responsible for the active and reactive power equilibrium inside the microgrid, performs the energy management
Exchange power definite value and other scheduling, protection instruction that module is issued by described information bus, while to the low-voltage alternating-current
Energy storage array, each distributed generation unit and load etc. are realized monitoring and are protected in net and net.Wherein, the power conditioning module
Also the periodic refresh control strategy of Δ t is pressed, determines to exchange power increment Δ P by AC transformation capacity limit moduleT, step is such as
Under：
1）The exchange power definite value P of the microgrid is obtained from described information busT.If set from described information bus
P is can't detect in timing is longTRefreshing, using last 1 freshness value；If still can't detect P outside setting durationTRefreshing,
Then judge that the microgrid enters isolated power grid state immediately, P is setTIt is 0；
2）It is input into the actual exchange work(of the microgrid and middle pressure AC network obtained by the AC transformation measurement unit
Rate Pt；
3）IfNo more than ε：
3.1）If actual exchange power is not less than transformer capacity, i.e.,, then Δ PT=0；
3.2）If actual exchange power exceedes transformer capacity, i.e.,, then Δ PT=, whereinExpression takes sign function, if being negative in bracket, returns to -1；If for just in bracket
Number, returns to 1；If being 0 in bracket, 0 is returned；
4）IfMore than ε：
4.1）If actual exchange power is not less than transformer capacity, i.e.,, then Δ PT=PT-Pt；
4.2）If actual exchange power exceedes transformer capacity, i.e.,, then Δ PT=；
Meanwhile, the power conditioning module obtains electric power P from power load measurement unitL, calculate actual measurement and generate electricity
Demand PN=PL-Pt.Then net power generation needs。
By net power generation needs, the energy-storage units maximum capacity, remaining carrying capacity, wind-powered electricity generation, photovoltaic element exert oneself
Reference value sumFeeding real power control module, the module sets according to scene, storage, oily dispatching sequence according to following specific rules
Put the energy storage array, wind-powered electricity generation unit, photovoltaic element, the definite value of oily electric unit：
1）Calculate storage, oily power definite value pending；
2）If storage, oily power definite value pending are just, and energy-storage units residue carrying capacity is enough, i.e.,And, then honourable power definite valueFor, energy storage power definite valueDeng
In, oily electrical power definite valueEqual to 0；
3）If storage, oily power definite value pending are just, and energy-storage units residue carrying capacity is not enough, i.e.,And, then：
3.1）Oily electrical power definite valueEqual to oily electric unit rated power；
3.2）If dump power volume is exerted oneself reference value more than wind-powered electricity generation, photovoltaic element, i.e.,, wind
Luminous power definite valueFor, energy storage power definite valueIt is equal to, by the microgrid unbalanced power amountAlerted to energy monitoring and display module；
3.3）If dump power volume is exerted oneself reference value less than or equal to wind-powered electricity generation, photovoltaic element, i.e.,
, honourable power definite valueFor, energy storage power definite valueIt is equal to；
4）If storage, oily power definite value pending are negative, and the energy-storage units have enough capacity, i.e.,And
And, then honourable power definite valueFor, energy storage power definite valueIt is equal to, oily electrical power definite valueEqual to 0；
5）If storage, oily power definite value pending are negative, and the energy-storage units do not have enough capacity, i.e.,
And, then：
5.1）Oily electrical power definite valueEqual to 0；
5.2）If storage, oily power definite value pending and wind-powered electricity generation, photovoltaic element are exerted oneself reference value sum be it is negative, i.e.,, then honourable power definite valueIt is 0, energy storage power definite valueIt is equal to 0, the microgrid power is uneven
WeighAlerted to energy monitoring and display module；
5.3）If storage, oily power definite value pending and wind-powered electricity generation, photovoltaic element are exerted oneself reference value sum be not it is negative, i.e.,, then honourable power definite valueFor, energy storage power definite valueIt is equal to。
To reach the target that voltage in AC network meets safety utilization of electric power requirement, the Regulation Control module is responsible for described micro-
In the range of net and its adjacent network reactive power fine feedback regulation control, including but not limited to following linear control methods.
The voltage regulating module is by voltage reference value and the difference incoming first of voltage measurements gathered by low-voltage alternating-current measurement unit
The reactive compensation unit and energy-storage units are connected the maximum idle of inversion unit by bounded proportional integrator, the proportional integrator
, used as the idle upper limit of exerting oneself, using the opposite number of the value as idle lower limit of exerting oneself, the parameter of proportional integrator is by managing for capacity sum
Reason person is given in advance, exports idle reference valueTo the power conditioning module.The power conditioning module willIt is transmitted to
Idle control module, and preferentially distribute to the reactive compensation unit；If the reactive compensation unit capacityDeficiency, then will
Remaining reactive requirementDistribute to the inversion unit.When the inversion unit receives and dispatches reactive power close to its idle work(
During rate upper and lower limit, monitored with display module to keeper's prompt alarm by the energy.
The energy storage control module carries out monitor in real time to the energy storage array by the energy storage measurement unit, receives institute
State the energy storage power definite value that real power control module is sent, the active power of the inversion unit is set according to the value.Set simultaneously
Put and use the power definite value of the D/D converting units being connected with energy storage array to be equal to wind, light, oil actual measurement generating work(as charger
Rate sum.If the normal refresh in setting duration of the phase signal in described information bus, the energy storage controls mould
Block using the signal as the inversion unit phase signal；, whereas if the phase signal in described information bus is not
Normal refresh in duration can be being set, then use last 1 time and receive the phase signal from the Phase synchronization module to rise
Point, generates operating frequency phase signal, as the phase signal of the inversion unit.The energy storage battle array is monitored by energy storage temperature measuring unit
Each energy-storage module overheat, overvoltage in row, the state such as overcharge, after above-mentioned state is detected, disconnect correlation module and other modules
Connection；When overheat, overvoltage, the state such as overcharge and disappear after, the automatic connection for recovering correlation module and other modules.
The oily electric control module is carried out by the oil electricity measurement unit to the working condition of oily electric unit, the situation of exerting oneself
Monitoring, receives the oily electrical power definite value that the real power control module is sent.IfIt is more than, and the oily electric unit shape
State it is normal and and it is not actuated, then start oily electric unit immediately and reach nominal output；IfNo more thanAnd the oily electric unit
Have been turned on, then close oily electric unit immediately.If the oily electric unit working condition is abnormal (including mechanical breakdown, oil starvation etc.), should
Operating oily electric unit is closed, and is monitored with display module to keeper's alarm prompt by the energy.
The honourable control module is by the wind-powered electricity generation measurement unit, the photoelectricity measurement unit to wind-powered electricity generation unit, photoelectricity
The working condition of unit, the situation of exerting oneself are monitored, and receive the honourable power definite value that the real power control module is sent, meter
Calculate honourable regulationing factor of power, by each wind-powered electricity generation, photovoltaic element in the microgrid（It is following to be represented with symbol i
Wind-powered electricity generation, photovoltaic element that concerned participation is enumerated）According to the value and power reference that the wind-powered electricity generation, photoelectricity measurement unit are obtained
, according toThe reference value of exerting oneself of each wind-powered electricity generation, photovoltaic element is set, and sends into the A/D relevant with each wind-powered electricity generation, photovoltaic element
Or the control loop of D/D converting units.When there is wind-powered electricity generation or photovoltaic element failure, monitored by the energy and display module
To keeper's alarm prompt.
The wind-powered electricity generation, photoelectricity, oil electricity, energy storage measurement unit are recorded and to the letter in addition to measured power data are provided, also
Breath bus provides the maximum output of related wind-powered electricity generation, photoelectricity, oily electric unit and energy storage array（Input）Power, when being configured at certain point
After disconnect switch near cloth generator unit, energy storage array disconnects because of reasons such as protections, the generator unit or energy storage array
Maximum output（Input）Power should set to 0 at once；If the disconnect switch of above-mentioned disconnection is re-closed, associated power generating unit or energy storage battle array
The maximum output of row（Input）Power also should at once return to the setting of its actual capacity.
Protection control module in the microgrid control module is responsible for monitoring all kinds of voltages, the frequency of the low-voltage alternating-current net
Unusual fluctuations and make protection act, and system operation when coordinating service without power-off：
1）If the voltage obtained by the low-voltage alternating-current measurement unit, electric current, frequency exceed safety limit, by institute
Energy monitoring is stated with display module to keeper's alarm prompt；
2）When the overvoltage, the overcurrent event that monitor danger, then by the disconnect switch in the microgrid control module
Control module disconnects the switch that AC network is pressed during wind-powered electricity generation, photoelectricity, oily electric unit, the inversion unit and the microgrid are connected,
And the microgrid is marked for malfunction, by power-failure protecting equipment and personal safety in the microgrid, and by the energy
Monitoring is with display module to keeper's alarm prompt.After failture evacuation, monitored and display mould by the energy by keeper
Block is controlled manually, first detects whether the energy-storage units still have enough electricity, if the first closure connection oil is electric very little for electricity
The switch of unit, is charged by the oily electric unit to the energy storage array；Treat that electricity reaches requirement, closure connects except failure microgrid
The switch disconnected by protection control module beyond the switch for connecing pressure AC network, is restarted microgrid and is run in isolated network mode.It is central
Voltage, electric current, the frequency of pressure and low-voltage alternating-current net in safety limit up to for a long time, be closed again enough the connection microgrid with
The switch of medium pressure AC network, realizes networking or is incorporated into the power networks.
3）When the energy-storage units need overall service without power-off, monitored by the energy and display module, notify institute
State the disconnect switch that disconnect switch control module is disconnected between the energy storage array and the inversion unit, be closed at connection wind,
Light, oily electric unit and the disconnect switch of the inversion unit, to realize stable state transition under isolated network state, can shift to an earlier date hand
It is dynamic to start oily electric unit and reach nominal output；When maintenance terminates, reinform the disconnect switch control module and close the storage
Disconnect switch between energy array and the inversion unit, simultaneously switches off opening between wind, light, oily electric unit and the inversion unit
Close, close because of the oily electric unit that maintenance is opened.
Compared with prior art, the invention has the advantages that：
1st, microgrid continuous electromigration between various working is enable, the balance of automatic holding generating electric power, by setting
Plan external source adjustment period, progressively increase and decrease the supply of outer network source, mitigate the impact of plan internal power adjustment, greatly reduce planned
Outer net power adjust the adverse effect brought to power supply quality.The quality of power supply is improve, safety utilization of electric power requirement is met.
2nd, energy storage array can stabilize the clean electric power generation unit such as the intermittence of wind light generation unit, scene and be placed in preferentially to go out
Power position, reduces and abandons honourable chance, advantageously reduces discharge.When the capacity of energy storage and oily electric unit is according to suggestion of the invention
When method is configured, energy storage array in accessing external network power supply or load valley electricity consumption phase supplement electricity, and can meet outer net and power not
Workload demand when sufficient；Oily electric unit runs under nominal power all the time only as stand-by power supply after startup, save oil plant into
This, reduces environmental pollution.
3rd, multiple miniature power distribution networks are connected, can when necessary realize that the power for not relying on outer network source mutually helps, and carries
Self-powered reliability high, the power failure risk that deduction and exemption external electrical network or internal power element fault bring to user to greatest extent and
Loss.
4th, when power and the sufficiently large energy storage array of capacity is configured, the miniature power distribution network of raising that can be proportional accommodates newly-increased
The ability of load, it is allowed to which net internal loading capacity is maximum more than transformer by capacity, makes microgrid increase-volume not become by initially planned
Depressor capacity impact, is greatly saved distribution investment for trnasforming urban land.
5th, energy storage array greatly reduces the wind of the overall failure caused by overheat, overvoltage, excessively stream etc. by modular arrangements
Danger；Using control strategy of the invention, mutually helped by wind, light, oily electric, outer network source and many microgrid power, energy storage can be realized
Array does not power off overall maintenance；Using energy storage participate in realizing power-off fault remove after the automatic recovery powered of microgrid.
Brief description of the drawings
Fig. 1 matches somebody with somebody the miniature power distribution network grid connected structure of Integral design and energy flow graph for typical case's storage.
Fig. 2 is the control signal flow graph of energy management module.
Fig. 3 is the control signal flow graph of microgrid control module.
Fig. 4 be power mutually help module under networking state the 2nd time calculate exchange power definite value flow chart.
Fig. 5 is the control signal flow graph of power conditioning module.
Fig. 6 is that power conditioning module calculates the flow chart for exchanging power increment.
Fig. 7 is real power control modular power definite value allocation process diagram.
Fig. 8 matches somebody with somebody Integral design Miniature electric network reactive-load control signal flow graph for storage.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and with reference to example.
Fig. 1 matches somebody with somebody the miniature power distribution network grid connected structure of Integral design and energy flow graph for typical case's storage.By closing open circuit in Fig. 1
Switch（S2）, the microgrid enters networking operation；Otherwise the microgrid enters isolated power grid.When in networking operation state,
If the disconnect switch at closure points of common connection（S3）, the microgrid of networking operation is passed through medium pressure AC network again
（12）With the outer network source（13）It is connected, then the microgrid enters grid-connected state.As shown in phantom in Figure 1, it is multiple
Microgrid in networking or grid-connected state can be by medium pressure AC network（12）Join end to end, constitute the connected microgrid
Group.During normal operation, disconnect switch S4-S7, S9-S12 are closed, and only S8 disconnects；The energy storage array（3）Overall constantly electric-examination
When repairing, S7, S9 are disconnected, close S8, enable wind, light, oily electric unit to continue to be powered to load, it is also possible to break under simultaneously net state
Opening S4 carries out the overall maintenance of distributed power supply system.
Fig. 2 is the control signal flow graph of energy management module.The module is responsible for the active balance control between each microgrid
Implementation of strategies, with when necessary for the connected microgrid group provides the function that power mutually helps.Often cross Δ t（Such as 0.2 second）'s
Time interval, by the network control information module（15）Collect outer net generated output（A4）It is each in information, the connected microgrid group
" microgrid generating, the electric power " of net（A5）Information and topological control module（25）The network topological information of offer（A3）.Institute
State outer net generated output（A4）Information middle pressure exchange incoming described information bus of measurement unit described in Fig. 2（A1）；It is described micro-
Net generates electricity, electric power（A5）By Fig. 3 apoplexy, light, oil, storage measurement unit（M1-M4、M6）Feeding described information bus（A1）；
The network topological information（A3）By the topological control module（25）Merge from the disconnect switch control module（34、38）Point
The on off state that supplementary biography enters（A16、A21）Obtain.The network control information module（15）The incoming energy after above- mentioned information is merged
Amount monitoring and display module（36）, show the topology situation of the microgrid group that is connected to keeper in the way of figure by numeral,
And mark the state of each microgrid, while its result is also fed into power described in Fig. 2 mutually helping module（16）.
The power mutually helps module（16）Grid-connected, networking or isolated network shape according to residing for each microgrid in the connected microgrid group
State, calculates according to Different Rule and exchanges power definite value（A2）：
1）Under simultaneously net state：
1.1）If agreement external source non-adjustment period（Refer to that the power supply signed with the outer network source electrical supplier according to user is assisted
View, the sufficient power period not near power time adjustment）, now outer network source described in Fig. 1（13）Generated output foot
Enough meet electricity consumption and the charge requirement of the connected microgrid group.Therefore, the exchange power definite value（A2）To be surveyed in each microgrid
Power load power and the energy storage array（3）Maximum charge power sum, then deduct wind, light and exert oneself reference value（The value can
Tried to achieve according to including but not limited to maximum energy capture MPPT methods）, it is ensured that wind, light are exerted oneself and preferentially utilize；
1.2）If agreement external source adjustment period（Refer to that the power supply signed with the outer network source electrical supplier according to user is assisted
View, the period for being unable to sufficient power near power time adjustment）, now outer network source described in Fig. 1（13）Generating work(
Rate may be insufficient for electricity consumption and the charge requirement of the connected microgrid group.Meanwhile, the outer network source（13）Power adjust
Whole amount may be larger, easily causes quality of power supply decline.Therefore, monitored by the energy by keeper and be input into display module
Outer source power adjustable strategies, it is the adjustment transitional period such as to delimit 10min, it is determined that outer network source when adjustment terminates（13）Expectation
Exert oneself（When expecting to exert oneself more than the connected microgrid group maximum power requirement, limitation expectation is exerted oneself and is needed equal to peak power
Ask）, then from current time, current external source exert oneself, can be progressively complete in 10min according to including but not limited to Serial regulation strategy
Into adjustment, reach expectation in finish time adjustment period and exert oneself, now by the outer network source（13）To the generating that each microgrid is supplied
Power is also adjusted according to gross capability change equal proportion；
2）Under networking state：
2.1）The unbalanced power amount for each microgrid being determined when calculating 1st time.If supply exceed demand for active power in microgrid,
Labeled as with mutually Ji ability（A classes）；Conversely, being then labeled as having mutual Ji demand（B classes）；
2.2）The 2nd time calculate when, realize each microgrid unbalanced power amount possess mutually Ji condition neighbouring microgrid dividing
Match somebody with somebody, its flow chart is as shown in Figure 4.When B class microgrids are found, its mutually Ji queue is read, the queue is specified in advance by keeper, by
The numbering of neighbouring microgrid is constituted.Designing the principle of queue is：If providing power by microgrid forward in queue mutually to help, one
As network loss it is small compared with latter.Therefore, by the order of mutually Ji queue, check whether the microgrid in each queue belongs to A classes.It was found that 1
Individual A classes microgrid, then the exchange power of the A class microgrids improve as far as possible, send power mutually help request B class microgrids power it is uneven
Corresponding reduction same level is weighed, untill the A class microgrids for finding make the unbalanced power amount of the B class microgrids be reduced to 0.Such as
Fruit traversal end still suffers from unbalanced power amount then alarm prompt keeper；
3）Under isolated network state, interaction power definite value is set to 0, if still suffering from the situation of net internal power supply-less-than-demand,
Alarm prompt keeper.
Additionally, the Phase synchronization module in the energy management module（40）Under grid-connected or networking state, in institute
State outer network source（13）When not having a power failure, measurement unit is exchanged by medium pressure（M10）Obtain outer net alternating voltage（A22）Letter
Breath, voltage phase information is extracted using technologies such as including but not limited to phase-locked loop circuits；Power-off fault can also occur in outer net
When, generate the industrial frequency AC signal and its phase information of simulation, it is ensured that neighboring area connected microgrid under having a power failure on a large scale
The stable operation of group.The above-mentioned phase signal that will be obtained（A6）Incoming described information bus（A1）, by the phase controlling of Fig. 3
Module（36）After capture, there is provided to the energy storage control module（21）, for controlling the inversion unit（7）.If described micro-
Net does not receive the phase signal from the Phase synchronization module, then receive phase signal as starting point with last 1 time, utilizes
The phase control module in the microgrid control module（36）Industrial frequency AC signal is produced as the phase of the inversion unit
Position signal.
The protection control module in the energy management module（39）It is responsible for middle pressure AC network described in monitoring Fig. 1
（12）And the outer network source（13）All kinds of voltages, the unusual fluctuations of frequency, if exchanging measurement unit by medium pressure
（M10）The voltage of acquisition, electric current, frequency exceed safety limit, then by the disconnect switch control in the energy management module
Molding block（38）Disconnect the switch of each microgrid and medium pressure AC network（S2）, implement protection；Handed over when by medium pressure
Stream measurement unit（M10）The voltage of acquisition, frequency meet safety requirements, then by disconnect switch control in the energy management module
Molding block（38）The switch of each microgrid of closure connection and medium pressure AC network（S2）.
Fig. 3 is the control signal flow graph of microgrid control module.The module is also the core of control method of the present invention
Module, can receive the exchange power definite value that the energy management module is provided（A2）And it is assigned to specific control module and correlation
Energy storage array, distributed generation unit, by phase signal（A6）The incoming energy storage control module of information（21）And control described
Inversion unit（7）, it is also possible to when above-mentioned control signal is not received, realize the microgrid reliability service under isolated network state.It is described
The power conditioning module in microgrid control module（19）Control signal flow graph it is as shown in Figure 5.The module is from the friendship
Rheology presses measurement unit（M9）Obtain actual exchange power（A7）Information, from the power load measurement unit（M4）Obtain microgrid
Interior electric power（A8）Sum, then survey power generation needs（A9）Equal to electric power（A8）Subtract actual exchange power（A7）.From
The power mutually helps module（16）Obtain this and exchange power definite value（A2）If, in isolated power grid state or in setting duration
The outer information communication lost with the energy management module, then exchange power definite value（A2）Set to 0.By the AC transformation capacity
Limitation module（27）Compare exchange power definite value（A2）With actual exchange power（A7）, considering AC transformer（11）Capacity is limited
Under the premise of system, calculate this and exchange power increment（A10）, its flow chart is as shown in Figure 6.By the value and actual measurement power generation needs
（A9）It is added, obtains net power generation needs（A11）, and it is input into the real power control module（22）.
The real power control module（22）It is responsible for the net power generation needs（A11）Distribute to the energy storage array（3）With
The wind-powered electricity generation unit（1）, the photovoltaic element（2）And the oily electric unit（8）, its power definite value allocation process diagram such as Fig. 7 institute
Show.When there is unbalanced power amount in assigning process, monitored by the energy and display module（36）Alerted to keeper.
Additionally, the Regulation Control module（18）Be responsible for the microgrid in the range of and its adjacent network reactive power it is fine
Feedback regulation control, it uses voltage reference value（A18）Subtract from the low-voltage alternating-current measurement unit（M8）Gather and send into and be described
Bus（A1）The low-voltage alternating-current net（10）Voltage measurements（A19）Obtain voltage deviation signal, passing ratio product
Divide device that voltage deviation signal is converted to the idle reference value of reflection reactive power demand（A17）, and in the reactive-load compensation list
Unit（9）With the inversion unit（7）Between distribute, as shown in Figure 8.First in the reactive compensation unit（9）It is middle distribution until
Untill full hair；Again the inversion unit is given by remaining reactive power demand assignment（7）.When the inversion unit（7）Transmitting-receiving nothing
When work(power is close to its reactive power upper and lower limit, monitored by the energy and display module（36）To keeper's prompt alarm.
If not installing reactive compensation unit in the microgrid, above-mentioned idle control strategy is reduced to only by the inversion unit（7）
Implement.
The energy storage control module（21）By the energy storage measurement unit（M3）To the energy storage array（3）Carry out in real time
Monitoring, receives the real power control module（22）The energy storage power definite value sent, the inversion unit is set according to the value
（7）Active power reference value.Charger is provided as simultaneously to use and the energy storage array（3）Connected D/D conversions
Unit（31）Power definite value be equal to wind, light, oil actual measurement generated output sum.If described information bus（A1）On the phase
Position signal（A6）Normal refresh, the then energy storage control module in setting duration（21）Using the signal as the inversion unit
（7）Phase signal；, whereas if described information bus（A1）On the phase signal（A6）Can not be in setting duration just
Often refresh, then using by the phase control module（36）The phase signal is received with last 1 time（A6）It is starting point, generation
Operating frequency phase signal（A15）, as the inversion unit（7）Phase signal.By the energy storage temperature measuring unit（M12）Monitoring
The energy storage array（3）In each energy-storage module overheat, overvoltage, the state such as overcharge, after above-mentioned state is detected, disconnect abnormal shape
The connection of morphotype block and other modules；When overheat, overvoltage, the state such as overcharge and disappear after, the module and other modules are recovered automatically
Connection.
The oily electric control module（23）By the oil electricity measurement unit（M6）Working condition to oily electric unit, exert oneself
Situation is monitored, and receives the real power control module（22）The oily electrical power definite value sent.IfIt is more than, and institute
State oily electric unit（8）State it is normal and and it is not actuated, then start the oily electric unit immediately（8）And reach nominal output；IfNo more thanAnd the oily electric unit（8）Have been turned on, then close the oily electric unit immediately（8）.If the oily electric unit
（8）Working condition is abnormal (including mechanical breakdown, oil starvation etc.), should close the operating oily electric unit（8）, and by described
Energy is monitored and display module（36）To keeper's alarm prompt.
The honourable control module（24）By the wind-powered electricity generation measurement unit（M1）, the photoelectricity measurement unit（M2）To institute
State wind-powered electricity generation unit（1）, the photovoltaic element（2）Working condition, the situation of exerting oneself be monitored, receive the real power control module
（22）The honourable power definite value sent, calculate honourable regulationing factor of power, will be each in the microgrid
Wind-powered electricity generation, photovoltaic element（It is following that wind-powered electricity generation, photovoltaic element that concerned participation is enumerated are represented with symbol i）According to the wind-powered electricity generation, light
Electric measurement unit（M1、M2）The value and power reference of acquisition, according toEach wind-powered electricity generation, photovoltaic element are set（1,2）'s
Exert oneself reference value.When the appearance wind-powered electricity generation unit（1）Or the photovoltaic element（2）During failure, monitor and show by the energy
Show module（36）To keeper's alarm prompt.
The wind-powered electricity generation, photoelectricity, oil electricity, energy storage measurement unit（M1、M2、M3、M6）In addition to measured power data are provided, also remember
Record and to described information bus（A1）Related wind-powered electricity generation is provided respectively（1）, photoelectricity（2）, oily electric unit（8）And energy storage array（3）'s
Maximum output（Input）Power, when the disconnect switch being configured near certain distributed generation unit, energy storage array is because of protection etc.
After reason disconnects, the maximum output of the generator unit or energy storage array（Input）Power should set to 0 at once；If the open circuit of above-mentioned disconnection
Switch is re-closed, the maximum output of associated power generating unit or energy storage array（Input）Power also should at once return to its actual appearance
The setting of amount.
Although the present invention is disclosed as above with preferred embodiment, embodiment is not of the invention for limiting.Not
Depart from the spirit and scope of the present invention, any equivalence changes done or retouching also belong to the protection domain of the present invention.Cause
The content that this protection scope of the present invention should be defined with claims hereof is as standard.
Claims (1)
1. integrated design microgrid control method is matched somebody with somebody in a kind of storage, it is characterised in that specifically include procedure below：
When using, by closing the disconnect switch of pressure and low-voltage alternating-current net in connection, the storage in 380-420V low-pressure sections is matched somebody with somebody
Integrated design microgrid can realize networking operation；Otherwise the microgrid enters isolated power grid；When in networking operation state, such as
Disconnect switch at fruit closure points of common connection, makes the microgrid of networking operation again by middle pressure AC network and outer network source phase
Connection, then the microgrid enters grid-connected state；If the microgrid of the multiple in networking or grid-connected state passes through
Power distribution network is connected, then merge and constitute the microgrid group that is connected；The maximum electric discharge general power P of energy storage array in the microgridDShould be not less than
The maximum electricity consumption general power P of whole AC load in netM；The maximum electricity of the energy storage array storage should be not less than 1 plan
The load power consumption in intranet and extranet power failure cycle, to reduce the utilization to oily electric unit；1 cycle of oily electric unit in the microgrid
Generated energy is no less than the power consumption of the cycle internal loading, to ensure that the long-time under the conditions of isolated network is powered；Meanwhile, if described
Outer network source according to schedule exert oneself by active accommodation, referred to as " external source adjustment in agreement ", is otherwise referred to as " the outer external source adjustment of agreement "；
The power-balance demand of the connected microgrid group is assigned to each distributed power generation element in real time, implements the whole network active flat
Weighing apparatus control strategy, is used to control the microgrid under above-mentioned grid-connected, networking or isolated power grid state；
Energy management module is responsible for the monitoring and protection of the mutual Ji of active power and medium pressure AC network of the connected microgrid group,
Keeper is monitored by energy therein and observes the whole network ruuning situation with display module simultaneously, sends scheduling and control instruction, is led to
Cross control of the topological control module realization to the whole network disconnect switch；The time interval of Δ t is often crossed, by net in energy management module
Control information module collects each microgrid generating, electric power information and net in outer net generated output information, the connected microgrid group
Network topology information；Above- mentioned information shows that it is tied by way of energy monitoring and display module are with numeral and figure to keeper
Fruit is admitted to power and mutually helps module simultaneously；
Power mutually helps module according to the incoming information of the network control information module, is calculated according to following rule described connected micro-
The exchange power definite value that net group respectively nets：
1）Simultaneously will first be divided into external source non-adjustment period and external source adjustment period in multiple agreements in agreement by net state, be supervised by the energy
Control with display module increase and decrease agreement in external source adjustment period and set its beginning and ending time, adjustment power information：
1.1）The external source non-adjustment period in agreement, to any microgrid in the connected microgrid group, meet each by the outer network source
The electricity consumption of microgrid load and the energy storage array charge requirement, wind light generation power are still preferentially utilized, specially：It exchanges power and determines
Value PTTake-PCWith the absorbable power P of maximumAIn higher value, negative value represent flow into microgrid power；PCBecome for the microgrid is exchanged
The maximum of depressor is by capacity, PAEqual to=- (PL+PR-PW), wherein PLIt is whole AC load real total power, P in netWIt is net
Interior whole wind, light are exerted oneself reference value sum, PRFor the maximum of energy storage array in net can use charging general power, the energy storage battle array having been filled with
It is 0 that row power is accrued；
1.2）The external source adjustment period in agreement, when the outer network source is insufficient for whole electricity consumptions, charge requirement, equal proportion
Reduce the exchange power of each microgrid；Simultaneously adjustment period progressively delivered power adjustment amount to slow down the impact to the quality of power supply, such as
Fruit is adjusted upward for power, and the power that energy storage array sends should be progressively reduced within adjustment period；If instead for power to downward
It is whole, the power that energy storage array sends should be stepped up within adjustment period, specific method of adjustment includes following linear adjusting methods：Press
According to when m- power planes on current time current outer net power and this 2 points companies of power after the adjustment of finish time adjustment period
Line, takes the power at correspondence moment as outer net power definite value P on straight lineX；If PXMore than the G of all microgridsiValue sum, then
By PXIt is set to the G of all microgridsiValue sum, GiFor-PCWith the absorbable power P of maximumAIn higher value；To the connected microgrid
Any microgrid in group, it exchanges power definite value PTEqual to weight coefficient WiWith PXProduct, wherein WiTake GiDivided by all microgrids
GiValue sum；Represent concerned with symbol i and enumerate individuality；
2）Under networking state, to any microgrid, P in the connected microgrid groupTCalculated according to following rule：
2.1）When calculating for the 1st time, the unbalanced power amount of each microgrid is obtained：
2.1.1）If the disconnect switch closure of connection wind-powered electricity generation unit, photovoltaic element, oily electric unit and inversion unit, and wind-powered electricity generation
Unit, photovoltaic element, oily electric unit EIAJ overload, i.e. PW+PO >PL+ ε, and ε be sufficiently small positive number when, PTSet
It is 0, while it is P to set imbalance power auxiliary variable Δ PW+PO-PLAnd PCAmong smaller value；
2.1.2）If connection wind-powered electricity generation unit, photovoltaic element, oily electric unit are closed with the disconnect switch of the inversion unit, and
Wind-powered electricity generation unit, photovoltaic element, oily electric unit EIAJ are not more than load, i.e. PW+PO ≤PLDuring+ε, PTP is disposed as with Δ PW
+PO-PLWith-PCAmong higher value；
2.1.3）If connection wind-powered electricity generation unit, photovoltaic element, oily electric unit are not closed with the disconnect switch of the inversion unit, and
And the energy storage array maximum discharge power is more than load, i.e. PD>PLDuring+ε, PT0 is set to, Δ P is set to PD-PLAnd PCAmong
Smaller value；
2.1.4）If connection wind-powered electricity generation unit, photovoltaic element, oily electric unit are not closed with the disconnect switch of the inversion unit, and
And the energy storage array maximum discharge power is not more than load, i.e. PD≤PLDuring+ε, PTP is disposed as with Δ PD-PLWith-PCAmong
Higher value；
2.2）When calculating for the 2nd time, realize each microgrid unbalanced power amount in the distribution for possessing the mutually neighbouring microgrid of Ji condition：
2.2.1）If need to outwards seek power mutually to help, i.e. Δ P<During-ε, Δ=- Δ P is remembered, mutually Ji queue is read, according to queue time
Sequence, to the microgrid in any queue for traversing, according to following rules modification PT：
2.2.1.1）If microgrid possesses the ability that power mutually helps that is provided out to traversal in one's power, but when supplying no more than demand, i.e.,
ΔP>When ε and Δ P≤Δ, Δ P is added to PT, Δ is set to Δ-Δ P, and Δ P is set to 0；
2.2.1.2）If microgrid possesses the ability that power mutually helps that is provided out to traversal in one's power, but when feeding more than demand, i.e. Δ P
>ε and Δ P>During Δ, Δ is added to PT, Δ is set to 0, and Δ P is set to Δ P- Δs；
2.2.1.3）If traversal terminates and Δ>ε, is monitored by the energy and shows that unbalanced power is alerted with display module
Information, reminds keeper to take manual control measure；
3）Under isolated network state, to the microgrid, PT0 is set to, and is calculated as below：
3.1）If connection wind-powered electricity generation unit, photovoltaic element, oily electric unit are closed with the disconnect switch of the inversion unit, and wind
Electric unit, photovoltaic element, oily electric unit EIAJ are less than load, i.e. PW+PO<PLIt is aobvious by the energy management module during-ε
Show unbalanced power warning information, remind keeper to take manual control measure；
3.2）If connection wind-powered electricity generation unit, photovoltaic element, oily electric unit are not closed with the disconnect switch of the inversion unit, and
The energy storage array maximum discharge power is less than load, i.e. PD<PLDuring-ε, show that power is uneven by the energy management module
Weighing apparatus warning information, reminds keeper to take manual control measure；
The power mutually helps the exchange power definite value P of each microgrid in the described connected microgrid group that module will be calculatedTFeeding letter
Breath bus；
If additionally, in networking or when simultaneously net state, outer network source are not stopped power supply, the phase in the energy management module
Synchronization module therefrom presses exchange measurement unit to obtain the phase signal of alternating voltage；If outer net power outage, periphery is defeated
During grid power blackout, phase letter of the Phase synchronization module by the use of the industrial frequency AC signal for itself producing as the inversion unit
Number；The signal is used for the phase of each microgrid inversion unit of the synchronous connected microgrid group；Produced when by the Phase synchronization module
During phase signal, the phase signal from outer network source is received as starting point with last 1 time, produce industrial frequency AC signal and its phase
Position signal；
Protection control module in the energy management module is responsible for monitoring each of medium pressure AC network and the outer network source
The unusual fluctuations of class voltage, frequency, if exchanging voltage, electric current, the frequency of measurement unit acquisition more than safety by medium pressure
Limit value, then disconnect each microgrid with medium pressure AC network by disconnect switch control module in the energy management module
Switch, implements protection；Meet safety requirements when the voltage of measurement unit acquisition, frequency is exchanged by medium pressure, then by institute
State the switch of each microgrid of disconnect switch control module closure connection and medium pressure AC network in energy management module；
Microgrid control module is responsible for the active and reactive power equilibrium inside the microgrid, performs the energy management module and passes through
Exchange power definite value and other scheduling, protection instruction that described information bus is issued, while to energy storage in low-voltage alternating-current net and net
Array, each distributed generation unit and load carry out realizing monitoring and protection；Wherein, power conditioning module presses the cycle brush of Δ t
New control strategy, determines to exchange power increment Δ P by AC transformation capacity limit moduleT, step is as follows：
1）The exchange power definite value P of the microgrid is obtained from described information busT；If from described information bus in setting
P is can't detect in longTRefreshing, using last 1 freshness value；If still can't detect P outside setting durationTRefreshing, then stand
Judge that the microgrid enters isolated power grid state, P is setTIt is 0；
2）It is input into the actual exchange power P of the microgrid and middle pressure AC network obtained by medium pressure exchange measurement unitt；
3）If | Pt - PT| no more than ε：
3.1）If actual exchange power is not less than transformer capacity, i.e., | Pt|≤PC+ ε, then Δ PT=0；
3.2）If actual exchange power exceedes transformer capacity, i.e., | Pt| ＞ PC+ ε, then Δ PT=sign（Pt）×PC - Pt, its
Middle sign is represented and is taken sign function, if in bracket being negative, return -1；If being positive number in bracket, 1 is returned；If being 0 in bracket,
Return to 0；
4）If | Pt - PT| more than ε：
4.1）If actual exchange power is not less than transformer capacity, i.e., | PT|≤PC+ ε, then Δ PT=PT-Pt；
4.2）If actual exchange power exceedes transformer capacity, i.e., | PT| ＞ PC+ ε, then Δ PT=sign（Pt）×PC - Pt；
Meanwhile, the power conditioning module obtains electric power P from power load measurement unitL, calculate actual measurement power generation needs PN
=PL-Pt；Then net power generation needs PΣ=PN+ΔPT；
By net power generation needs, the energy storage array maximum capacity EC, remaining carrying capacity ER, wind-powered electricity generation unit, photovoltaic element exert oneself reference
Value sum PWFeeding real power control module, the real power control module according to wind, light, storage, oily dispatching sequence, according to as follows
Specific rules set the energy storage array, wind-powered electricity generation unit, photovoltaic element, the definite value of oily electric unit：
1）Calculate energy storage array, oily electric unit power definite value P pendingSO=PΣ-PW；
2）If energy storage array, oily electric unit power definite value pending are just, and energy storage array residue carrying capacity is enough, i.e. PSO
>=-ε and PSO×Δt+ER＞ 0.1EC, then honourable power definite value PWSIt is PW, energy storage power definite value PSSEqual to PΣ, oily electrical power
Definite value POSEqual to 0；
3）If energy storage array, oily electric unit power definite value pending are just, and energy storage array residue carrying capacity is not enough, i.e. PSO
>=-ε and PSO×Δt+ER≤0.1EC, then：
3.1）Oily electrical power definite value POSEqual to oily electric unit rated power PO；
3.2）If dump power volume is exerted oneself reference value, i.e. P more than wind-powered electricity generation unit, photovoltaic elementΣ-PO＞ PW+ ε, honourable power is determined
Value PWSIt is PW, energy storage power definite value PSSEqual to PO+PW, by microgrid unbalanced power amount PΣ-PO-PWMonitored and display mould to energy
Block is alerted；
3.3）If dump power volume is exerted oneself reference value, i.e. P less than or equal to wind-powered electricity generation unit, photovoltaic elementΣ-PO≤PW+ ε, honourable work(
Rate definite value PWSIt is PΣ-PO, energy storage power definite value PSSEqual to PΣ；
4）If energy storage array, oily electric unit power definite value pending are negative, and energy storage array has enough capacity, i.e. PSO＜-ε are simultaneously
And-PSO×Δt≤EC-ER, then honourable power definite value PWSIt is PW, energy storage power definite value PSSEqual to PΣ, negative number representation charge power,
Oily electrical power definite value POSEqual to 0；
5）If energy storage array, oily electric unit power definite value pending are negative, and energy storage array does not have enough capacity, i.e. PSO＜-ε
And-PSO× Δ t ＞ EC-ER, then：
5.1）Oily electrical power definite value POSEqual to 0；
5.2）If energy storage array, oily electric unit power definite value pending and wind-powered electricity generation unit, photovoltaic element are exerted oneself, reference value sum is
It is negative, i.e. PSO+PW＜-ε, then honourable power definite value PWS is 0, energy storage power definite value PSSEqual to 0, by the microgrid unbalanced power
Amount PΣAlerted to energy monitoring and display module；
5.3）If energy storage array, oily electric unit power definite value pending and wind-powered electricity generation unit, photovoltaic element exert oneself reference value sum not
It is negative, i.e. PSO+PW>=-ε, then honourable power definite value PWS is PΣ, energy storage power definite value PSSEqual to PΣ；
Regulation Control module be responsible in the range of the microgrid and its adjacent network reactive power fine feedback regulation control, to reach
Voltage meets the target of safety utilization of electric power requirement in AC network, specifically includes following linear control methods：The Regulation Control
Module is by voltage reference value and the incoming first bounded ratio of difference of voltage measurements gathered by low-voltage alternating-current measurement unit
Integrator, the proportional integrator reactive compensation unit and energy storage array are connected the maximum reactive capability sum of inversion unit as
The idle upper limit of exerting oneself, using the opposite number of the value as idle lower limit of exerting oneself, the parameter of proportional integrator is given in advance by keeper,
Export idle reference value QΣTo power conditioning module；The power conditioning module is by QΣIdle control module is transmitted to, and preferentially
Distribute to reactive compensation unit；If the reactive compensation unit capacity QCDeficiency, then by remaining reactive requirement QΣ-QCDistribute to institute
State inversion unit；When the inversion unit receives and dispatches reactive power close to its reactive power upper and lower limit, monitored by the energy
With display module to keeper's prompt alarm；
Energy storage control module carries out monitor in real time to the energy storage array by energy storage measurement unit, receives the real power control mould
The energy storage power definite value P that block is sentSS, the active power of the inversion unit is set according to the value；It is provided as charger simultaneously
Wind-powered electricity generation unit, photovoltaic element, oily electric unit are equal to using the power definite value of the D/D converting units being connected with energy storage array to survey
Generated output sum；If the normal refresh in setting duration of the phase signal in described information bus, the energy storage control
Module using the signal as the inversion unit phase signal；, whereas if the phase signal in described information bus can not
The normal refresh in setting duration, then it is starting point to use and receive the phase signal from the Phase synchronization module last 1 time,
Generation operating frequency phase signal, as the phase signal of the inversion unit；The energy storage array is monitored by energy storage temperature measuring unit
In each energy-storage module overheat, overvoltage and the state that overcharges, after above-mentioned state is detected, disconnect correlation module with other modules
Connection；After overheat, overvoltage or overcharging state disappear, the automatic connection for recovering correlation module and other modules；
Oily electric control module is monitored by oil electricity measurement unit to the working condition of oily electric unit, the situation of exerting oneself, and receives institute
State the oily electrical power definite value P that real power control module is sentOS；If POSMore than ε, and the oily electric unit state is normally and not
Start, then start oily electric unit immediately and reach nominal output；If POSThe no more than ε and oily electric unit has been turned on, then immediately
Close oily electric unit；If the oily electric unit working condition exception, should close operating oily electric unit, and by the energy
Monitoring is with display module to keeper's alarm prompt；
Honourable control module by wind-powered electricity generation measurement unit, photoelectricity measurement unit to wind-powered electricity generation unit, the working condition of photovoltaic element, go out
Power situation is monitored, and receives the honourable power definite value P that the real power control module is sentWS, calculate honourable regulationing factor of power
FW=PWS/PW, each wind-powered electricity generation unit, photovoltaic element in the microgrid are obtained according to the wind-powered electricity generation measurement unit, photoelectricity measurement unit
Value and power reference PWi, according to FW×PWiThe reference value of exerting oneself of each wind-powered electricity generation unit, photovoltaic element is set, and is sent into and each wind-powered electricity generation list
The control loop of the relevant A/D or D/D converting units of unit, photovoltaic element；When there is wind-powered electricity generation unit or photovoltaic element failure, lead to
The energy monitoring is crossed with display module to keeper's alarm prompt；The wind-powered electricity generation list that concerned participation is enumerated is represented with symbol i
Unit, photovoltaic element；
The wind-powered electricity generation measurement unit, photoelectricity measurement unit, oil electricity measurement unit, energy storage measurement unit are except offer measured power data
Outward, also record and provide the maximum defeated of related wind-powered electricity generation unit, photovoltaic element, oily electric unit and energy storage array to described information bus
Go out or input power, when the disconnect switch being configured near certain distributed generation unit, energy storage array because protection reason disconnects
Afterwards, the maximum output or input power of the generator unit or energy storage array should set to 0 at once；If the disconnect switch of above-mentioned disconnection is again
The maximum output or input power of closure, associated power generating unit or energy storage array also should at once return to setting for its actual capacity
Put；
Protection control module in microgrid control module is responsible for monitoring all kinds of voltages, the extraordinary wave of frequency of the low-voltage alternating-current net
System operation when moving and make protection act, and coordinating service without power-off：
1）If the voltage obtained by the low-voltage alternating-current measurement unit, electric current, frequency exceed safety limit, by the energy
Amount monitoring is with display module to keeper's alarm prompt；
2）When the overvoltage, the overcurrent event that monitor danger, then controlled by the disconnect switch in the microgrid control module
Module disconnects the switch that AC network is pressed during wind-powered electricity generation unit, photovoltaic element, oily electric unit, inversion unit and the microgrid are connected,
And the microgrid is marked for malfunction, by power-failure protecting equipment and personal safety in the microgrid, and by the energy
Monitoring is with display module to keeper's alarm prompt；After failture evacuation, monitored and display mould by the energy by keeper
Block is controlled manually, first detects whether the energy storage array still has enough electricity, if the first closure connection oil is electric very little for electricity
The switch of unit, is charged by the oily electric unit to the energy storage array；Treat that electricity reaches requirement, closure connects except failure microgrid
The switch disconnected by protection control module beyond the switch for connecing pressure AC network, is restarted microgrid and is run in isolated network mode；It is central
Voltage, electric current, the frequency of pressure and low-voltage alternating-current net in safety limit up to for a long time, be closed again enough the connection microgrid with
The switch of medium pressure AC network, realizes networking or is incorporated into the power networks；
3）When the energy storage array needs overall service without power-off, monitored by the energy and display module, notify described disconnected
Way switch control module disconnects the disconnect switch between the energy storage array and the inversion unit, is closed at connecting wind-powered electricity generation list
The disconnect switch of unit, photovoltaic element, oily electric unit and inversion unit, to realize stable state transition under isolated network state, can
Oily electric unit is manually booted in advance and reaches nominal output；When maintenance terminates, the disconnect switch control module closure is reinformed
Disconnect switch between the energy storage array and the inversion unit, simultaneously switches off wind-powered electricity generation unit, photovoltaic element, oily electric unit and institute
The switch between inversion unit is stated, is closed because of the oily electric unit that maintenance is opened.
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| CN105870977B (en) * | 2016-05-05 | 2019-04-09 | 彭旭华 | A kind of planned energy storage microgrid Active Control Method for subtracting confession of permission direct-furnish power supply |
| CN106067679B (en) * | 2016-07-03 | 2018-06-19 | 东北电力大学 | Improve the design method of the flywheel energy storage Energy Management System of wind-electricity integration power quality |
| CN109713663B (en) * | 2018-12-28 | 2022-05-31 | 北方民族大学 | Microgrid electric energy quality and energy cooperative control method based on generation power and load prediction |
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| CN103094926B (en) * | 2013-01-09 | 2014-12-10 | 清华大学 | Multi-component energy-storing capacity collocation method applied to micro power grid group |
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