CN109066824A - A kind of active distribution network load compliant balance control method - Google Patents
A kind of active distribution network load compliant balance control method Download PDFInfo
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- CN109066824A CN109066824A CN201811085027.XA CN201811085027A CN109066824A CN 109066824 A CN109066824 A CN 109066824A CN 201811085027 A CN201811085027 A CN 201811085027A CN 109066824 A CN109066824 A CN 109066824A
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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
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The present invention provides a kind of active distribution network load compliant balance control method.The described method includes: active distribution network configuration multiport flexible switch equipment connection DC side with exchange lateral load；Acquire the exchange side of the multiport flexible switch equipment connection and the power data of DC side；The regulation power of the multiport flexible switch equipment is calculated based on the power data；It sends a command to control equipment and carries out the AC port of the multiport flexible switch equipment and the power regulation of DC side.The present invention connects the exchange feeder line and DC line of different voltages grade by multiport flexible switch equipment, the power supply capacity and flexible switch for giving full play to voltage levels feeder line are to the mutual supporting role between connected feeder line, it is acquired using main website with analytical calculation and AC port power is precisely adjusted by flexible switch equipment, it realizes feeder line load balancing, improves safety, stability, the flexibility of power distribution network.
Description
Technical field
The present invention relates to power system automation technology fields, and in particular to a kind of active distribution network load compliant equilibrium control
Method processed.
Background technique
Power distribution network is final bridge of the electric energy from production to user, is a link particularly important in electric system.By
In conventional electrical distribution net operation with closed ring there is electromagnetic looped network, circulating power, increase short circuit electricity and expand accident range the problems such as,
Generally use open loop operation mode.
Inventors have found that power supply reliability is low there is also utilization rate of equipment and installations is low under open loop operation mode, different feeder lines,
The problems such as lacking mutual support between region, voltage class.Conventional electrical distribution net load balancing depends on the hand of network reconfiguration
Section, but network reconfiguration based on segmentation, interconnection switch is restricted asks with operating life, response speed and the dash current etc. that switch
It inscribes and trend can not be precisely controlled, regulating effect is limited.
Summary of the invention
The purpose of the embodiment of the present invention is that providing a kind of active distribution network load compliant balance control method, pass through multiport
Flexible switch equipment connects the exchange feeder line and DC line of different voltages grade, gives full play to the power supply of voltage levels feeder line
Ability and flexible switch are adjusted the power flowed through using flexible switch equipment, promoted to the mutual supporting role between connected feeder line
The equalization of incoming feeder load distribution, solves above-mentioned technical problem.
The embodiment of the invention provides a kind of active distribution network load compliant balance control methods, comprising:
Active distribution network configuration multiport flexible switch equipment connection DC side with exchange side；
Acquire the exchange side of the multiport flexible switch equipment connection and the power data of DC side；
The load regulation power of the multiport flexible switch equipment is calculated based on the power data；
Send a command to the load that control equipment carries out the AC port and DC side of the multiport flexible switch equipment
Power regulation.
Further, active distribution network configuration multiport flexible switch equipment connection DC side with exchange side, comprising:
The AC port that the active distribution network configures the multiport flexible switch equipment connects the exchange side, direct current
Port connects DC side；Wherein the quantity of the AC port is two or more, and the exchange side includes different voltages
The feeder line of grade；The quantity of the DC port be one or more, the DC side include distributed generation resource, energy storage and
Flexible load.
Further, one and only one port of the AC port operates in control voltage mode, remaining AC port
Operate in control power mode.
Further, the power number of the exchange side of the acquisition multiport flexible switch equipment connection and DC side
According to, comprising:
Active distribution network obtains the active power value for being connected to the head end of the feeder line；
Obtain the active power of the AC port；
Obtain the power of the DC port；
Injecting power can be increased newly to the DC port by obtaining the distributed energy, energy storage and flexible load.
Further, the load regulation function that the multiport flexible switch equipment is calculated based on the power data
Rate, comprising:
It is calculated based on the power data and needs balanced total work between the AC port of the multiport flexible switch equipment
Rate, the active power adjustment amount of each AC port and active power desired value；
Out-of-limit check and processing are carried out to the active power desired value.
Further, it is needed between the AC port that the multiport flexible switch equipment is calculated based on the power data
Want balanced general power, the active power adjustment amount of each AC port and active power desired value, comprising:
Balanced general power is needed between calculating the AC port based on the power data:
In formula, LlBalanced general power, L are needed between AC portiFor the active power value of the head end of exchange feeder line, Δ
PdIt is that DC port increases injecting power newly；
The expectation power of each item exchange feeder line is calculated according to the rated capacity of exchange feeder line:
Wherein, LiexpFor the expectation power for exchanging feeder line, SNiIt is the rated capacity for exchanging feeder line i；
Calculate the active power adjustment amount of each AC port and the active power desired value of each AC port:
ΔPi=Liexp-Li,
Piexp=Pi+ΔPi,
In formula, Δ PiFor the active power adjustment amount of AC port, LiexpFor the expectation power for exchanging feeder line, LiTo exchange feeder line
Head end active power value, PiexpFor the active power desired value of AC port, PiFor the active power of AC port.
It is further, described that out-of-limit check and processing are carried out to the active desired value, comprising:
Whether out-of-limit check the active desired value；
Out-of-limit processing is carried out to out-of-limit active desired value.
It is further, described that out-of-limit processing is carried out to out-of-limit active desired value, comprising:
Desired value is negative and the desired value of the out-of-limit AC port more limits the quantity and cumulative obtain negative desired value more limit the quantity；
Desired value is positive and the desired value of the out-of-limit AC port more limits the quantity and cumulative obtain positive desired value more limit the quantity；
Compare the negative desired value more to limit the quantity and the positive desired value more the size limited the quantity；
It is handled based on comparative result.
It is further, described to be handled based on comparative result, comprising:
If the negative desired value more limits the quantity greater than the positive desired value more limits the quantity:
All desired values are negative and the desired value of the out-of-limit AC port is set as limit value, by the conservation of energy,
The desired value for the AC port that desired value is positive is reduced by the feeder line capacity ratio；
Judging whether there is the AC port that desired value is positive, there are out-of-limit situations, if not having, update associated AC port
Power adjustment；If so, then all expectation power are positive and the desired value of out-of-limit AC port is set as limit value, and
According to the conservation of energy, the exhausted of the desired value of the AC port of limit value is negative and not reached by feeder line capacity ratio reduction desired value
To value, the power adjustment of associated AC port is updated；
If the negative desired value more limits the quantity less than the positive desired value more limits the quantity:
All desired values are positive and the desired value of out-of-limit AC port is set as limit value, by the conservation of energy, by feedback
Line capacity compares the absolute value for reducing the desired value for the AC port that desired value is negative；
Judging whether there is the AC port that desired value is negative, there are out-of-limit situations, if not having, update associated AC port
Power adjustment, if so, then all expectation power are negative and the desired value of out-of-limit AC port is set as limit value, and
According to the conservation of energy, the desired value for reducing the AC port that desired value was positive and did not reach limit value is compared by feeder line capacity, more
The power adjustment of new correlation AC port；
If the negative desired value more limits the quantity equal to the positive desired value more limits the quantity, by the out-of-limit exchange of all desired values
The desired value of port is set as limit value, updates related port power adjustment.
Further, it is described send a command to control equipment carry out the multiport flexible switch equipment AC port and
The bearing power of DC side is adjusted, comprising:
Send a command to the active power adjustment that control equipment adjusts remaining AC port in addition to Isobarically Control AC port
Amount；
Send a command to the power that control equipment adjusts the distributed generation resource, energy storage and flexible load.
The technical solution that the embodiment of the present invention provides connects different voltages grade by multiport flexible switch equipment
Feeder line and DC line are exchanged, the power supply capacity for giving full play to voltage levels feeder line and flexible switch are between connected feeder line
Mutual supporting role is acquired with analytical calculation using main website and precisely adjusts flow port power by flexible switch equipment, real
Existing feeder line load balancing overcomes power failure caused by traditional interconnection switch grid switching operation, cyclization impact and control precision
The problems such as poor, meets the custom powers demands such as distributed generation resource consumption, high power supply reliability, improve power distribution network safety,
Stability, flexibility.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of active distribution network load compliant balance control method process signal that one embodiment of the invention provides
Figure；
Fig. 2 is a kind of main electrical scheme schematic diagram for multiport flexible switch that one embodiment of the invention provides；
Fig. 3 be another embodiment of the present invention provides a kind of active distribution network load compliant balance control method flow chart.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below with reference to drawings and examples,
The specific embodiment progress of technical solution of the present invention in further detail, is clearly illustrated.However, specific implementations described below
Mode and embodiment are for illustrative purposes only, rather than limiting the invention.It only contains a part of the invention and implements
Example, instead of all the embodiments, the other embodiments that those skilled in the art obtain various change of the invention all belong to
In the scope of protection of the invention.
Fig. 1 is a kind of active distribution network load compliant balance control method process signal that one embodiment of the invention provides
Figure, the described method comprises the following steps.
In step s 110, active distribution network configuration multiport flexible switch equipment connection DC side with exchange side.
Fig. 2 is a kind of main electrical scheme schematic diagram for multiport flexible switch that one embodiment of the invention provides.As shown in Fig. 2,
Active distribution network configures multiport flexible switch equipment.Multiport flexible switch equipment has n AC port and m DC terminal
Mouthful, n >=2, m >=1.
AC port connection exchange side, exchange side include different voltages grade feeder line, AC port one and only one
Port operates in control voltage mode, remaining AC port operates in control power mode.DC port connects DC side, direct current
Side includes distributed generation resource, energy storage and flexible load.
In the step s 120, the power data of the exchange side of acquisition multiport flexible switch equipment connection and DC side.
Active distribution network main website obtain be connected to multiport flexible switch exchange feeder line head end active power value L1,
L2 ... Ln flows to the direction of end as positive direction using feeder line head end.Each AC port active-power P 1 of acquisition flexible switch,
P2 ... Pn, to flow into the direction of flexible switch as positive direction.Each DC port power P d1, Pd2 of acquisition flexible switch ... Pdm.
Injecting power Δ P can be increased newly to DC port by obtaining distributed energy, energy storage and flexible load in each DC portd.Here, wanting
Comprehensively consider regulating economy and each DC port power constraint.
In step s 130, the load regulation power of multiport flexible switch equipment is calculated based on power data.
The general power for needing equilibrium between the AC port of multiport flexible switch equipment, respectively exchange are calculated based on power data
The active power adjustment amount and active power desired value of port.And out-of-limit check and processing are carried out to active power desired value.
In step S140, AC port and direct current that control equipment carries out multiport flexible switch equipment are sent a command to
The bearing power of side is adjusted.
Active distribution network main website sends to the control equipment of multiport flexible switch equipment and orders, and adjusts except Isobarically Control is handed over
The active power of remaining AC port other than flow port.It is sent out simultaneously to the distributed generation resource of DC side, energy storage and flexible load
Order of losing one's life carries out probability adjusting.
Fig. 3 be another embodiment of the present invention provides a kind of active distribution network load compliant balance control method flow chart.
As shown in figure 3, flow chart is more detailed to there is the implementing procedure of the above method.
In step S210, active distribution network configuration multiport flexible switch equipment connection DC side with exchange side.
Fig. 2 is a kind of main electrical scheme schematic diagram for multiport flexible switch that one embodiment of the invention provides.As shown in Fig. 2,
Active distribution network configures multiport flexible switch equipment.Multiport flexible switch equipment has n AC port and m DC terminal
Mouthful, n >=2, m >=1.
AC port connection exchange side, exchange side include different voltages grade feeder line, AC port one and only one
Port operates in control voltage mode, remaining AC port operates in control power mode.DC port connects DC side, direct current
Side includes distributed generation resource, energy storage and flexible load.
Step S220, the exchange side of acquisition multiport flexible switch equipment connection and the power data of DC side.Step
S220 includes sub-step S221, S222, S223, S224.
In step S221, active distribution network main website obtains the head end for being connected to the exchange feeder line of multiport flexible switch
Active power value L1, L2 ... Ln flows to the direction of end as positive direction using feeder line head end.
In step S222, obtain each AC port active-power P 1 of flexible switch, P2 ... Pn, to flow into flexible switch
Direction be positive direction.
In step S223, each DC port power P d1, Pd2 of acquisition flexible switch ... Pdm.
In step S224, obtaining distributed energy, energy storage and flexible load in each DC port can be new to DC port
Increase injecting power Δ Pd.Here, to comprehensively consider regulating economy and each DC port power constraint.
Step S230 calculates the load regulation power of multiport flexible switch equipment based on power data.Step S230 packet
Enclosed tool step S231, S232.
In step S231, equilibrium is needed between the AC port based on power data calculating multiport flexible switch equipment
General power, the active power adjustment amount of each AC port and active power desired value.
Balanced general power is needed between calculating AC port based on power data.Calculation formula is as follows.
In formula, LlBalanced general power, L are needed between AC portiFor the active power value of the head end of exchange feeder line, Δ
PdIt is that DC port increases injecting power newly.
Active distribution network main website calculates the expectation power of each item exchange feeder line according to the rated capacity of exchange feeder line.
Wherein, LiexpFor the expectation power for exchanging feeder line, SNiIt is the rated capacity for exchanging feeder line i,
Calculate the active power adjustment amount of each AC port and the active power desired value of each AC port.
ΔPi=Liexp-Li；
Piexp=Pi+ΔPi。
In formula, Δ PiFor the active power adjustment amount of AC port, LiexpFor the expectation power for exchanging feeder line, LiTo exchange feeder line
Head end active power value, PiexpFor the active power desired value of AC port, PiFor the active power of AC port.
Step S232 carries out out-of-limit check and processing to active power desired value.Step S232 include sub-step S2321,
S2322。
In step S2321, whether out-of-limit active power desired value is checked.
If not out-of-limit, it is directly entered step S240.If out-of-limit, S2322 is entered step.
Step S2322 carries out out-of-limit processing to out-of-limit active power desired value.Step S2322 includes sub-step
S23221、S23222、S23223、S23224。
In step S23221, it would be desirable to which value, which is negative, and the desired value of out-of-limit AC port is more limited the quantity cumulative obtains the negative phase
Prestige value is more limited the quantity.
In step S23222, it would be desirable to which value, which is positive, and the desired value of out-of-limit AC port is more limited the quantity cumulative obtains the positive phase
Prestige value is more limited the quantity.
In step S23223, more negative desired value is more limited the quantity and positive desired value more the size limited the quantity.
In step S23224, handled based on comparative result.
If negative desired value is more limited the quantity greater than positive desired value more limiting the quantity, all desired values are negative and out-of-limit exchange end
The desired value of mouth is set as limit value, and by the conservation of energy, the phase for the AC port that desired value is positive is reduced by feeder line capacity ratio
Prestige value.Judging whether there is the AC port that desired value is positive again, there are out-of-limit situations, if not having, update associated AC port
Power adjustment；If so, then all expectation power are positive and the desired value of out-of-limit AC port is set as limit value, and according to
According to the conservation of energy, the absolute of the desired value of the AC port of limit value is negative and not reached by feeder line capacity ratio reduction desired value
Value updates the power adjustment of associated AC port.
If negative desired value is more limited the quantity less than positive desired value more limiting the quantity, all desired values are positive and out-of-limit exchange end
The desired value of mouth is set as limit value, and by the conservation of energy, the phase for reducing the AC port that desired value is negative is compared by feeder line capacity
The absolute value of prestige value.Judging whether there is the AC port that desired value is negative again, there are out-of-limit situations, if not having, update related friendship
The power adjustment of flow port, if so, then by all expectation power be negative and the desired value of out-of-limit AC port setting be limited
Definite value, and according to the conservation of energy, the phase for reducing the AC port that desired value was positive and did not reach limit value is compared by feeder line capacity
Prestige value updates the power adjustment of associated AC port.
If negative desired value more limits the quantity equal to positive desired value more limits the quantity, by the phase of the out-of-limit AC port of all desired values
Prestige value is set as limit value, updates related port power adjustment.
In step S240, AC port and direct current that control equipment carries out multiport flexible switch equipment are sent a command to
The bearing power of side is adjusted.
Active distribution network main website sends to the control equipment of multiport flexible switch equipment and orders, and adjusts except Isobarically Control is handed over
The active power of remaining AC port other than flow port.It is sent out simultaneously to the distributed generation resource of DC side, energy storage and flexible load
Order of losing one's life carries out probability adjusting.
It should be noted that each embodiment above by reference to described in attached drawing is only to illustrate the present invention rather than limits this
The range of invention, those skilled in the art should understand that, it is right under the premise without departing from the spirit and scope of the present invention
The modification or equivalent replacement that the present invention carries out, should all cover within the scope of the present invention.In addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of in combination with any other embodiment all or part of come using.
Claims (10)
1. a kind of active distribution network load compliant balance control method, comprising:
Active distribution network configures multiport flexible switch equipment connection exchange side and DC side；
Acquire the exchange side of the multiport flexible switch equipment connection and the power data of DC side；
The load regulation power of the multiport flexible switch equipment is calculated based on the power data；
It sends a command to control equipment and carries out the AC port of the multiport flexible switch equipment and the bearing power of DC side
It adjusts.
2. the method according to claim 1, wherein the active distribution network configures multiport flexible switch equipment
Connection DC side with exchange side, comprising:
The AC port that the active distribution network configures the multiport flexible switch equipment connects the exchange side, DC port
Connect DC side；Wherein the quantity of the AC port is two or more, and the exchange side includes different voltages grade
Feeder line；The quantity of the DC port is one or more, and the DC side includes distributed generation resource, energy storage and flexibility
Load.
3. according to the method described in claim 2, it is characterized in that, one and only one port of the AC port operates in control
Voltage mode, remaining AC port operate in control power mode.
4. according to the method described in claim 3, it is characterized in that, what the acquisition multiport flexible switch equipment connected
Exchange the power data of side and DC side, comprising:
Active distribution network obtains the active power value for being connected to the head end of the feeder line；
Obtain the active power of the AC port；
Obtain the power of the DC port；
Injecting power can be increased newly to the DC port by obtaining the distributed energy, energy storage and flexible load.
5. according to the method described in claim 4, it is characterized in that, described soft based on the power data calculating multiport
The load regulation power of property switchgear, comprising:
It is calculated based on the power data and needs balanced general power, each between the AC port of the multiport flexible switch equipment
The active power adjustment amount and active power desired value of AC port；
Out-of-limit check and processing are carried out to the active power desired value.
6. according to the method described in claim 5, it is characterized in that, described soft based on the power data calculating multiport
Property switchgear AC port between need balanced general power, the active power adjustment amount of each AC port and active power expectation
Value, comprising:
Balanced general power is needed between calculating the AC port based on the power data:
In formula, LlBalanced general power, L are needed between AC portiFor the active power value of the head end of exchange feeder line, Δ PdIt is
DC port increases injecting power newly；
The expectation power of each item exchange feeder line is calculated according to the rated capacity of exchange feeder line:
Wherein, LiexpFor the expectation power for exchanging feeder line, SNiIt is the rated capacity for exchanging feeder line i；
Calculate the active power adjustment amount of each AC port and the active power desired value of each AC port:
ΔPi=Liexp-Li,
Piexp=Pi+ΔPi,
In formula, Δ PiFor the active power adjustment amount of AC port, LiexpFor the expectation power for exchanging feeder line, LiFor the head for exchanging feeder line
The active power value at end, PiexpFor the active power desired value of AC port, PiFor the active power of AC port.
7. according to the method described in claim 6, it is characterized in that, described carry out out-of-limit check and place to the active desired value
Reason, comprising:
Whether out-of-limit check the active desired value；
Out-of-limit processing is carried out to out-of-limit active desired value.
8. the method according to the description of claim 7 is characterized in that described carry out out-of-limit processing to out-of-limit active desired value,
Include:
Desired value is negative and the desired value of the out-of-limit AC port more limits the quantity and cumulative obtain negative desired value more limit the quantity；
Desired value is positive and the desired value of the out-of-limit AC port more limits the quantity and cumulative obtain positive desired value more limit the quantity；
Compare the negative desired value more to limit the quantity and the positive desired value more the size limited the quantity；
It is handled based on comparative result.
9. according to the method described in claim 8, it is characterized in that, described handled based on comparative result, comprising:
If the negative desired value more limits the quantity greater than the positive desired value more limits the quantity:
All desired values are negative and the desired value of the out-of-limit AC port is set as limit value, by the conservation of energy, by institute
State the desired value that feeder line capacity ratio reduces the AC port that desired value is positive；
Judging whether there is the AC port that desired value is positive, there are out-of-limit situations, if not having, update the function of associated AC port
Rate adjustment amount；If so, then all expectation power are positive and the desired value of out-of-limit AC port is set as limit value, and foundation
The conservation of energy is negative and is not reached the absolute of the desired value of the AC port of limit value by feeder line capacity ratio reduction desired value
Value updates the power adjustment of associated AC port；
If the negative desired value more limits the quantity less than the positive desired value more limits the quantity:
All desired values are positive and the desired value of out-of-limit AC port is set as limit value, by the conservation of energy, are held by feeder line
Amount compares the absolute value for reducing the desired value for the AC port that desired value is negative；
Judging whether there is the AC port that desired value is negative, there are out-of-limit situations, if not having, update the function of associated AC port
Rate adjustment amount, if so, then all expectation power are negative and the desired value of out-of-limit AC port is set as limit value, and foundation
The conservation of energy is compared the desired value for reducing the AC port that desired value was positive and did not reach limit value, more cenotype by feeder line capacity
Close the power adjustment of AC port；
If the negative desired value more limits the quantity equal to the positive desired value more limits the quantity, by the out-of-limit AC port of all desired values
Desired value be set as limit value, update related port power adjustment.
10. according to the method described in claim 5, it is characterized in that, it is described send a command to control equipment carry out multiport it is soft
Property switchgear AC port and DC side bearing power adjust, comprising:
Send a command to the active power adjustment amount that control equipment adjusts remaining AC port in addition to Isobarically Control AC port；
Send a command to the power that control equipment adjusts the distributed generation resource, energy storage and flexible load.
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| CN110729765A (en) * | 2019-08-30 | 2020-01-24 | 四川大学 | Distribution network flexibility evaluation index system considering SOP and optimal scheduling method |
| CN111917110A (en) * | 2020-06-29 | 2020-11-10 | 国电南瑞南京控制***有限公司 | Direct-current power distribution network loop closing and loop opening control method, system and storage medium |
| CN116155081A (en) * | 2023-04-23 | 2023-05-23 | 深圳市澳博森科技有限公司 | Overload adjustment method and device based on multiport power adapter |
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