CN105552903A - Method, device and system for reducing closed-loop current - Google Patents
Method, device and system for reducing closed-loop current Download PDFInfo
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- CN105552903A CN105552903A CN201610065901.8A CN201610065901A CN105552903A CN 105552903 A CN105552903 A CN 105552903A CN 201610065901 A CN201610065901 A CN 201610065901A CN 105552903 A CN105552903 A CN 105552903A
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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
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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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
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention relates to a method, device and system for reducing a closed-loop current. The method comprises the following steps of acquiring load powers of a first closed-loop end and a second closed-loop end of a closed-loop point; acquiring an expected load power of the first closed-loop end and an expected load power of the second closed-loop end when the closed-loop current is minimum according to a predetermined rule; adjusting an access power of a first interruptible load and/or an access power of a second interruptible load so that the two ends of the closed-loop point respectively reach the expected load power of the first closed-loop end and the expected load power of the second closed-loop end and the closed-loop current reaches minimum, and executing closed-loop operation at the closed-loop point. By adjusting the access power of the first interruptible load and/or the second interruptible load to adjust the active power on a closed-loop branch, the phase of the voltage difference between the two ends of the closed-loop point is adjusted, the size of the voltage difference between the two ends of the closed-loop point can be adjusted to the great extent so as to reduce the closed-loop current, and a new method is provided for reducing the closed-loop current.
Description
Technical field
The present invention relates to for distribution technique field, be specifically related to a kind of method, the Apparatus and system that reduce Alloy White Iron.
Background technology
At present, domestic power distribution network generally adopts the supply power mode of closed loop design, open loop operation.When maintenance or fault, can the load that do not have a power failure down be realized by conjunction, Open Loop Operation, thus improve the reliability of power supply.But when performing Loop Closing Operation, because the existence of cyclization switch both sides voltage difference, the circulation (i.e. cyclization steady-state current) flowing through cyclization switch can be produced in electrical network, and cyclization also will produce larger cyclization impulse current instantaneously, cyclization steady-state current and cyclization impulse current (hereinafter referred to as Alloy White Iron) all will directly have influence on the safe and stable operation of electrical network.
Because voltage is vector, cyclization point both end voltage extent is by the amplitude of cyclization point both end voltage and phase decision, the method of existing reduction Alloy White Iron, by adjustment load tap changer, to regulate the amplitude of the voltage difference at cyclization point two ends, thus reduce cyclization point both end voltage extent; Or, regulate reactive power compensator, to reduce the difference of the reactive power at cyclization point two ends, thus reduce cyclization point both end voltage extent.
But, because voltage magnitude is relevant to the active power of electrical network, voltage-phase is relevant to the reactive power of electrical network, the scheme of above-mentioned adjustment load tap changer and reactive power compensator is only regulate reactive power, thus is merely able to the amplitude regulating cyclization point both end voltage difference, the phase place of cyclization point both end voltage difference can not be regulated, therefore, the adjustment of involutory circling point both end voltage extent has certain limitation, thus also has certain limitation for reduction Alloy White Iron.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is to overcome in prior art and can not regulates active power, thus the adjustment of involutory circling point both end voltage extent has certain circumscribed defect, thus provide a kind of method reducing Alloy White Iron, comprise the steps:
Obtain the first cyclization end of cyclization point and the load power of the second cyclization end; The first cyclization branch road that described first cyclization end is corresponding is connected with the first interruptible load, the second cyclization branch road that described second cyclization end is corresponding is connected with the second interruptible load, the load power of described first cyclization end comprises the access power of described first interruptible load, and the load power of described second cyclization end comprises the access power of described second interruptible load;
The expected load power of the first cyclization end time minimum according to pre-defined rule acquisition Alloy White Iron and the expected load power of the second cyclization end;
Adjust the access power of described first interruptible load and/or the access power of described second interruptible load, make described cyclization point two ends reach the expected load power of described first cyclization end and the expected load power of described second cyclization end respectively, thus make Alloy White Iron reach minimum;
Loop Closing Operation is performed at described cyclization point.
Preferably, described according to pre-defined rule obtain Alloy White Iron minimum time the expected load power of the first cyclization end and the expected load power of the second cyclization end, comprise the access power of simulation described first interruptible load of adjustment and/or described second interruptible load, simulation Loop Closing Operation, acquisition makes Alloy White Iron minimum, or the load power of described first cyclization end when making Alloy White Iron trend towards minimum and described second cyclization end.
Preferably, described according to pre-defined rule obtain Alloy White Iron minimum time the expected load power of the first cyclization end and the step of the expected load power of the second cyclization end, comprising:
Keep the access power of described first interruptible load constant, the access power of described second interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of described second interruptible load; Until the access power of described second interruptible load is reduced to zero;
Obtain simulation Alloy White Iron value minimum time described second interruptible load access power;
The access power of described second interruptible load when keeping simulation Alloy White Iron value minimum is constant, the access power of described first interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of described first interruptible load; Until the access power of described first interruptible load is reduced to zero;
The access power of described first interruptible load when acquisition simulation Alloy White Iron value is minimum;
The access power of described first interruptible load time minimum according to simulation Alloy White Iron value and the access power of described second interruptible load, the expected load power of described first cyclization end when calculating Alloy White Iron is minimum and the expected load power of described second cyclization end.
Preferably, described according to pre-defined rule obtain Alloy White Iron minimum time the expected load power of the first cyclization end and the step of the expected load power of the second cyclization end, also comprise:
Judge the one that in described first cyclization end and described second cyclization end, load power is larger;
Keep the load power of the cyclization end that load power is less constant, the access power of the interruptible load of the larger cyclization end of load power is progressively reduced with predetermined step-length, simulation Loop Closing Operation, the access power of interruptible load on Alloy White Iron value during record each simulation Loop Closing Operation and the larger cyclization branch road of load; Until the access power of interruptible load is reduced to zero on the larger cyclization branch road of described load;
Obtain simulation Alloy White Iron minimum time described first cyclization branch road and described second cyclization branch road on the access power of interruptible load.
Present invention also offers a kind of device reducing Alloy White Iron, comprising:
First acquiring unit, for the load power of the first cyclization end and the second cyclization end that obtain cyclization point; The first cyclization branch road that described first cyclization end is corresponding is connected with the first interruptible load, the second cyclization branch road that described second cyclization end is corresponding is connected with the second interruptible load, the load power of described first cyclization end comprises the access power of described first interruptible load, and the load power of described second cyclization end comprises the access power of described second interruptible load;
Second acquisition unit, for the expected load power of the first cyclization end time minimum according to pre-defined rule acquisition Alloy White Iron and the expected load power of the second cyclization end;
Adjustment unit, for the access power of the access power and/or described second interruptible load that adjust described first interruptible load, make described cyclization point two ends reach the expected load power of described first cyclization end and the expected load power of described second cyclization end respectively, thus make Alloy White Iron reach minimum;
Performance element, for performing Loop Closing Operation at described cyclization point.
Preferably, described according to pre-defined rule obtain Alloy White Iron minimum time the expected load power of the first cyclization end and the expected load power of the second cyclization end, comprise the access power of simulation described first interruptible load of adjustment and/or described second interruptible load, simulation Loop Closing Operation, acquisition makes Alloy White Iron minimum, or the load power of described first cyclization end when making Alloy White Iron trend towards minimum and described second cyclization end.
Preferably, described second acquisition unit, comprising:
First analog submodule unit, for keeping the access power of described first interruptible load constant, the access power of described second interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of described second interruptible load; Until the access power of described second interruptible load is reduced to zero;
First obtains subelement, for obtain simulation Alloy White Iron value minimum time the access power of described second interruptible load;
Second analog submodule unit, the access power of described second interruptible load during for keeping simulation Alloy White Iron value minimum is constant, the access power of described first interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of described first interruptible load; Until the access power of described first interruptible load is reduced to zero;
Second obtains subelement, for obtain simulation Alloy White Iron value minimum time the access power of described first interruptible load;
First computation subunit, for the access power of described first interruptible load time minimum according to simulation Alloy White Iron value and the access power of described second interruptible load, the expected load power of described first cyclization end when calculating Alloy White Iron is minimum and the expected load power of described second cyclization end.
Preferably, described second acquisition unit, also comprises:
Judgment sub-unit, for the one judging that in described first cyclization end and described second cyclization end, load power is larger;
3rd analog submodule unit, load power for the cyclization end keeping load power less is constant, the access power of the interruptible load of the larger cyclization end of load power is progressively reduced with predetermined step-length, simulation Loop Closing Operation, the access power of interruptible load on Alloy White Iron value during record each simulation Loop Closing Operation and the larger cyclization branch road of load; Until the access power of interruptible load is reduced to zero on the larger cyclization branch road of described load;
3rd obtains subelement, for obtain simulation Alloy White Iron minimum time described first cyclization branch road and described second cyclization branch road on the access power of interruptible load.
Present invention also offers a kind of system reducing Alloy White Iron, comprise the first cyclization branch road at cyclization point two ends, the second cyclization branch road, described first cyclization branch road is connected with the first interruptible load, described second cyclization branch road is connected with the second interruptible load; Described system also comprises:
Interruptable-Load Management system, for managing access and the excision of described first interruptible load and/or the second interruptible load;
Cyclization controller, comprise above-mentioned arbitrary described device, be connected respectively with described first cyclization branch road, described second cyclization branch road and described Interruptable-Load Management system, by the access power of the access power and/or described second interruptible load that control the first interruptible load described in described Interruptable-Load Management system call interception.
Technical solution of the present invention, tool has the following advantages:
1. the method for reduction Alloy White Iron provided by the invention, by the first cyclization end of acquisition cyclization point and the load power of the second cyclization end, the first cyclization end time minimum according to pre-defined rule acquisition Alloy White Iron and the expected load power of the second cyclization end, adjust the access power of the first interruptible load and/or the second interruptible load to adjust the active power on cyclization branch road, thus the phase place of adjustment cyclization point both end voltage difference, cyclization point both end voltage extent can be adjusted largely thus reduce Alloy White Iron, provide a kind of new approaches reducing Alloy White Iron.
2. the method for reduction Alloy White Iron provided by the invention, by simulating the access power of adjustment first interruptible load and/or the second interruptible load, simulation Loop Closing Operation, acquisition makes Alloy White Iron minimum, or the load power of the first cyclization end when making Alloy White Iron trend towards minimum and the second cyclization end, to obtain the method for the expected load of the first cyclization end and the second cyclization end, simple and easy to do, amount of calculation is little.
3. the method for reduction Alloy White Iron provided by the invention, by first keeping the access power of the first interruptible load constant, the access power of the second interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, the access power of the second interruptible load when keeping simulation Alloy White Iron value minimum is again constant, the access power of the first interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, the mode of the first interruptible load when then acquisition Alloy White Iron value is minimum and the access power of the second interruptible load, give when the load power relative size of unknown first cyclization end and the second cyclization end, the obtain manner of the expected load of the first cyclization end and the second cyclization end.
4. the method for reduction Alloy White Iron provided by the invention, first judge the one that in the first cyclization end and the second cyclization end, load power is larger, the load power of the cyclization end keeping load power less is again constant, the access power of the interruptible load of the larger cyclization end of load power is progressively reduced with predetermined step-length, simulation Loop Closing Operation, then obtain simulation Alloy White Iron minimum time the first cyclization branch road and the second cyclization branch road on the access power of interruptible load, thus obtain the mode of the expected load power of the first cyclization end and the second cyclization end, greatly reduce the step of simulation cyclization, simplify the process of simulation.
5. the method for reduction Alloy White Iron provided by the invention, it obtains in two kinds of methods of the expected load of the first cyclization end and the second cyclization end, regulate the amplitude of cyclization point both end voltage difference can be suitable for the method reducing Alloy White Iron by regulating load tap changer and reactive power compensator simultaneously, namely the words regulating load tap changer and reactive power compensator are considered when simulating, then according to while the first cyclization end of gained and expected load correspondence adjustment first interruptible load of the second cyclization end and the second interruptible load, load tap changer and reactive power compensator can also be regulated, thus adjust while active power and reactive power can be realized, adjust the voltage extent at cyclization point two ends to greatest extent, reduce Alloy White Iron to greatest extent.
6. the system of reduction Alloy White Iron provided by the invention, Interruptable-Load Management system is controlled by lotus controller, manage access and the excision of the first interruptible load and/or the second interruptible load, adjust the active power on cyclization branch road, thus the phase place of adjustment cyclization point both end voltage difference, cyclization point both end voltage extent can be adjusted largely thus reduce Alloy White Iron, providing a kind of new approaches reducing Alloy White Iron.
Accompanying drawing explanation
In order to be illustrated more clearly in the specific embodiment of the invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Figure 1A is a kind of flow chart reducing a concrete example of the method for Alloy White Iron in the embodiment of the present invention 1;
Figure 1B is a kind of flow chart reducing a concrete example of step S2 in the method for Alloy White Iron in the embodiment of the present invention 1;
Fig. 1 C is a kind of flow chart reducing another concrete example of step S2 in the method for Alloy White Iron in the embodiment of the present invention 1;
Fig. 2 A is a kind of theory diagram reducing a concrete example of the device of Alloy White Iron in the embodiment of the present invention 2;
Fig. 2 B is a kind of theory diagram reducing a concrete example of second acquisition unit in the device of Alloy White Iron in the embodiment of the present invention 2;
Fig. 2 C is a kind of theory diagram reducing another concrete example of second acquisition unit in the device of Alloy White Iron in the embodiment of the present invention 2.
Fig. 3 is a kind of schematic diagram reducing a concrete example of the system of Alloy White Iron in the embodiment of the present invention 3.
Embodiment
Be clearly and completely described technical scheme of the present invention below in conjunction with accompanying drawing, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In describing the invention, it should be noted that, term " first ", " second ", " the 3rd " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can also be the connection of two element internals, can be wireless connections, also can be wired connection.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
In addition, if below in the described different execution mode of the present invention involved technical characteristic do not form conflict each other and just can be combined with each other.
Embodiment 1
The present embodiment provides a kind of method reducing Alloy White Iron, as shown in Figure 1A, comprises the steps:
S1: obtain the first cyclization end of cyclization point and the load power of the second cyclization end.The first cyclization branch road that first cyclization end is corresponding is connected with the first interruptible load, the second cyclization branch road that second cyclization end is corresponding is connected with the second interruptible load, the load power of the first cyclization end comprises the access power of the first interruptible load, and the load power of the second cyclization end comprises the access power of the second interruptible load.
Interruptible load, refer under electrical network peak or emergency, the part can interrupted in distribution network load, such as electric automobile, electric heater, cold accumulation air-conditioner etc., interruptible load here comprise connect cyclization branch road, the summation of the various load that can interrupt.Preferably, interruptible load is often connected on cyclization branch road, when needs carry out Loop Closing Operation, just can excise interruptible load.The load power of excision interruptible load, adjustment interruptible load access cyclization branch road, can adjust the active power of cyclization branch road, thus the voltage of adjustment cyclization end, reduce the voltage difference at cyclization point two ends, reduce Alloy White Iron.
S2: the expected load power of the first cyclization end time minimum according to pre-defined rule acquisition Alloy White Iron and the expected load power of the second cyclization end.
S3: adjust the access power of the first interruptible load and/or the access power of the second interruptible load, makes cyclization point two ends reach the expected load power of the first cyclization end and the expected load power of the second cyclization end respectively, thus makes Alloy White Iron reach minimum.
The expected load power of the first cyclization end that can get according to step S2 and the expected load power of the second cyclization end, only the adjustment access power of the first interruptible load or the access power of the second interruptible load, also can adjust the access power of the first interruptible load and the access power of the second interruptible load simultaneously.
S4: perform Loop Closing Operation at cyclization point.After Loop Closing Operation completes, also need the connection recovering interruptible load.
Step S2, comprises simulation adjustment first interruptible load and/or the access power of the second interruptible load, and simulation Loop Closing Operation, obtains and make Alloy White Iron minimum, or the load power of the first cyclization end when making Alloy White Iron trend towards minimum and the second cyclization end.
When simulating adjustment, only can adjust the access power of the first interruptible load or the access power of the second interruptible load, also can adjust the access power of the first interruptible load and the access power of the second interruptible load simultaneously.Acquisition Alloy White Iron is minimum, or the load power of the first cyclization end when making Alloy White Iron trend towards minimum and the second cyclization end.Such as, ideally, when Alloy White Iron is zero, optimum performs Loop Closing Operation, but often may not adjust to Alloy White Iron is zero, when such as Alloy White Iron is 0.75A in the scope that system can allow, then when Alloy White Iron is 0.75A, the load power of the first cyclization end and the second cyclization end also can respectively as the expected load power of the first cyclization end and the second cyclization end.
As a kind of preferred implementation of the present embodiment, as shown in Figure 1B, step S2 comprises:
S21: keep the access power of the first interruptible load constant, progressively reduce the access power of the second interruptible load with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of the second interruptible load; Until the access power of the second interruptible load is reduced to zero.
S22: obtain simulation Alloy White Iron value minimum time the second interruptible load access power.
The access power of the second interruptible load making Alloy White Iron minimum can be got by step S21 and step 22.But if when the load power of the second cyclization end is less than the load power of the first cyclization end, the access power only reducing the second interruptible load can make the difference of the load power of the first cyclization end and the second cyclization end increasing, can increase Alloy White Iron on the contrary.Therefore, also need to adjust the first interruptible load again.
S23: the access power of the second interruptible load when keeping simulation Alloy White Iron value minimum is constant, the access power of the first interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of the first interruptible load; Until the access power of the first interruptible load is reduced to zero.
S24: the access power of the first interruptible load when acquisition simulation Alloy White Iron value is minimum.
S25: the access power of the first interruptible load time minimum according to simulation Alloy White Iron value and the access power of the second interruptible load, calculate Alloy White Iron minimum time the first cyclization end expected load power with the expected load power of the second cyclization end.
The expected load power of the first cyclization end in step S2 and the expected load power of the second cyclization end can be obtained by above-mentioned steps S21-S25.The program gives when the load power relative size of unknown first cyclization end and the second cyclization end, the obtain manner of the expected load of the first cyclization end and the second cyclization end.
As the another kind of preferred implementation of the present embodiment, as shown in Figure 1 C, step S2 also comprises:
S26: judge the one that in the first cyclization end and the second cyclization end, load power is larger.
S27: keep the load power of the cyclization end that load power is less constant, the access power of the interruptible load of the larger cyclization end of load power is progressively reduced with predetermined step-length, simulation Loop Closing Operation, the access power of interruptible load on Alloy White Iron value during record each simulation Loop Closing Operation and the larger cyclization branch road of load; Until the access power of interruptible load is reduced to zero on the larger cyclization branch road of load.
S28: obtain simulation Alloy White Iron minimum time the first cyclization branch road and the second cyclization branch road on the access power of interruptible load.
Above-mentioned steps S26-S28 is by first finding the one that in the first cyclization end and the second cyclization end, load power is larger, the only access power of the interruptible load of the cyclization end that Load adjustment is larger, gets final product the expected load power of the first cyclization end in obtaining step S2 and the expected load power of the second cyclization end.Compared with step S21-S25, greatly reduce the step of simulation cyclization, simplify the process of simulation.
It should be added that, above-mentioned steps S21-S25 and step S26-S28 is two of step S2 embodiments arranged side by side.In above-mentioned two kinds of embodiments, regulate the amplitude of cyclization point both end voltage difference can be suitable for the method reducing Alloy White Iron by regulating load tap changer and reactive power compensator simultaneously, namely the words regulating load tap changer and reactive power compensator are considered when simulating, then according to while the first cyclization end of gained and expected load correspondence adjustment first interruptible load of the second cyclization end and the second interruptible load, load tap changer and reactive power compensator can also be regulated, thus adjust while active power and reactive power can be realized, adjust the voltage extent at cyclization point two ends to greatest extent, reduce Alloy White Iron to greatest extent.
The method of the reduction Alloy White Iron that the embodiment of the present invention provides, by adjusting the second interruptible load that the first interruptible load and/or the second cyclization branch road that the first cyclization branch road connects connect, adjust the active power on cyclization branch road, thus the phase place of adjustment cyclization point both end voltage difference, cyclization point both end voltage extent can be adjusted largely thus reduce Alloy White Iron, providing a kind of new approaches reducing Alloy White Iron.
Embodiment 2
The present embodiment provides a kind of device reducing Alloy White Iron, as shown in Figure 2 A, comprises the first acquiring unit 10, second acquisition unit 20, adjustment unit 30 and performance element 40.
First acquiring unit 10, for the load power of the first cyclization end and the second cyclization end that obtain cyclization point; The first cyclization branch road that first cyclization end is corresponding is connected with the first interruptible load, the second cyclization branch road that second cyclization end is corresponding is connected with the second interruptible load, the load power of the first cyclization end comprises the access power of the first interruptible load, and the load power of the second cyclization end comprises the access power of the second interruptible load.
Second acquisition unit 20, for the expected load power of the first cyclization end time minimum according to pre-defined rule acquisition Alloy White Iron and the expected load power of the second cyclization end.
Adjustment unit 30, for the access power of the access power and/or the second interruptible load that adjust the first interruptible load, make cyclization point two ends reach the expected load power of the first cyclization end and the expected load power of the second cyclization end respectively, thus make Alloy White Iron reach minimum.
Performance element 40, for performing Loop Closing Operation at cyclization point.
Second acquisition unit 20, comprise the access power of simulation adjustment first interruptible load and/or the second interruptible load, simulation Loop Closing Operation, obtains and makes Alloy White Iron minimum, or the load power of the first cyclization end when making Alloy White Iron trend towards minimum and the second cyclization end.
As a kind of preferred implementation of the present embodiment, second acquisition unit 20, comprises the first analog submodule unit 21, first and obtains subelement 22, second analog submodule unit 23, second acquisition subelement 24 and the first computation subunit 25.
First analog submodule unit 21, for keeping the access power of the first interruptible load constant, the access power of the second interruptible load is progressively reduced, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of the second interruptible load with predetermined step-length; Until the access power of the second interruptible load is reduced to zero.
First obtains subelement 22, for obtain simulation Alloy White Iron value minimum time the access power of the second interruptible load.
Second analog submodule unit 23, the access power of the second interruptible load during for keeping simulation Alloy White Iron value minimum is constant, the access power of the first interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of the first interruptible load; Until the access power of the first interruptible load is reduced to zero.
Second obtains subelement 24, for obtain simulation Alloy White Iron value minimum time the access power of the first interruptible load.
First computation subunit 25, for the access power of the first interruptible load time minimum according to simulation Alloy White Iron value and the access power of the second interruptible load, the expected load power of the first cyclization end when calculating Alloy White Iron is minimum and the expected load power of the second cyclization end.
As a kind of preferred implementation of the present embodiment, second acquisition unit, also comprises judgment sub-unit 26, the 3rd analog submodule unit 27 and the 3rd obtains subelement 28.
Judgment sub-unit 26, for the one judging that in the first cyclization end and the second cyclization end, load power is larger.
3rd analog submodule unit 27, load power for the cyclization end keeping load power less is constant, the access power of the interruptible load of the larger cyclization end of load power is progressively reduced with predetermined step-length, simulation Loop Closing Operation, the access power of interruptible load on Alloy White Iron value during record each simulation Loop Closing Operation and the larger cyclization branch road of load; Until the access power of interruptible load is reduced to zero on the larger cyclization branch road of load.
3rd obtains subelement 28, for obtain simulation Alloy White Iron minimum time the first cyclization branch road and the second cyclization branch road on the access power of interruptible load.
The device of the reduction Alloy White Iron that the embodiment of the present invention provides, by adjusting the second interruptible load that the first interruptible load and/or the second cyclization branch road that the first cyclization branch road connects connect, adjust the active power on cyclization branch road, thus the phase place of adjustment cyclization point both end voltage difference, cyclization point both end voltage extent can be adjusted largely thus reduce Alloy White Iron, providing a kind of new approaches reducing Alloy White Iron.
Embodiment 3
The present embodiment provides a kind of system reducing Alloy White Iron, as shown in Figure 3, comprises
The first cyclization branch road at cyclization point two ends, the second cyclization branch road, the first cyclization branch road is connected with the first interruptible load, and the second cyclization branch road is connected with the second interruptible load.The system of this reduction Alloy White Iron also comprises Interruptable-Load Management system and cyclization controller.
Interruptable-Load Management system, for managing access and the excision of the first interruptible load and/or the second interruptible load.Preferably, before Loop Closing Operation, keep the first interruptible load to access the first cyclization branch road with constant access power, keep the second interruptible load to access the second cyclization branch road with constant access power; When Loop Closing Operation, according to the control command of cyclization controller, excise the first interruptible load and/or the second interruptible load; After Loop Closing Operation, recover the access of cut interruptible load, or readjust the access power of interruptible load on cyclization branch road.
Interruptible load, refer under electrical network peak or emergency, the part can interrupted in distribution network load, such as electric automobile, electric heater, cold accumulation air-conditioner etc., interruptible load here comprise connect cyclization branch road, the summation of the various load that can interrupt.Preferably, interruptible load is often connected on cyclization branch road, when needs carry out Loop Closing Operation, just can excise interruptible load.The load power of excision interruptible load, adjustment interruptible load access cyclization branch road, can adjust the active power of cyclization branch road, thus the voltage of adjustment cyclization end, reduce the voltage difference at cyclization point two ends, reduce Alloy White Iron.
Cyclization controller, comprise the device described in embodiment 2, be connected respectively with the first cyclization branch road, the second cyclization branch road and Interruptable-Load Management system, send control command to Interruptable-Load Management system, control the access power of Interruptable-Load Management system call interception first interruptible load and/or the access power of the second interruptible load.
The system of the reduction Alloy White Iron that the embodiment of the present invention provides, Interruptable-Load Management system is controlled by lotus controller, manage access and the excision of the first interruptible load and/or the second interruptible load, adjust the active power on cyclization branch road, thus the phase place of adjustment cyclization point both end voltage difference, cyclization point both end voltage extent can be adjusted largely thus reduce Alloy White Iron, providing a kind of new approaches reducing Alloy White Iron.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And thus the apparent change of extending out or variation be still among the protection range of the invention.
Claims (9)
1. reduce a method for Alloy White Iron, it is characterized in that, comprise the steps:
Obtain the first cyclization end of cyclization point and the load power of the second cyclization end; The first cyclization branch road that described first cyclization end is corresponding is connected with the first interruptible load, the second cyclization branch road that described second cyclization end is corresponding is connected with the second interruptible load, the load power of described first cyclization end comprises the access power of described first interruptible load, and the load power of described second cyclization end comprises the access power of described second interruptible load;
The expected load power of the first cyclization end time minimum according to pre-defined rule acquisition Alloy White Iron and the expected load power of the second cyclization end;
Adjust the access power of described first interruptible load and/or the access power of described second interruptible load, make described cyclization point two ends reach the expected load power of described first cyclization end and the expected load power of described second cyclization end respectively, thus make Alloy White Iron reach minimum;
Loop Closing Operation is performed at described cyclization point.
2. the method for reduction Alloy White Iron according to claim 1, it is characterized in that, described according to pre-defined rule obtain Alloy White Iron minimum time the expected load power of the first cyclization end and the expected load power of the second cyclization end, comprise the access power of simulation described first interruptible load of adjustment and/or described second interruptible load, simulation Loop Closing Operation, acquisition makes Alloy White Iron minimum, or the load power of described first cyclization end when making Alloy White Iron trend towards minimum and described second cyclization end.
3. the method for reduction Alloy White Iron according to claim 1, is characterized in that, described according to pre-defined rule obtain Alloy White Iron minimum time the expected load power of the first cyclization end and the step of the expected load power of the second cyclization end, comprising:
Keep the access power of described first interruptible load constant, the access power of described second interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of described second interruptible load; Until the access power of described second interruptible load is reduced to zero;
Obtain simulation Alloy White Iron value minimum time described second interruptible load access power;
The access power of described second interruptible load when keeping simulation Alloy White Iron value minimum is constant, the access power of described first interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of described first interruptible load; Until the access power of described first interruptible load is reduced to zero;
The access power of described first interruptible load when acquisition simulation Alloy White Iron value is minimum;
The access power of described first interruptible load time minimum according to simulation Alloy White Iron value and the access power of described second interruptible load, the expected load power of described first cyclization end when calculating Alloy White Iron is minimum and the expected load power of described second cyclization end.
4. the method for reduction Alloy White Iron according to claim 1, is characterized in that, described according to pre-defined rule obtain Alloy White Iron minimum time the expected load power of the first cyclization end and the step of the expected load power of the second cyclization end, also comprise:
Judge the one that in described first cyclization end and described second cyclization end, load power is larger;
Keep the load power of the cyclization end that load power is less constant, the access power of the interruptible load of the larger cyclization end of load power is progressively reduced with predetermined step-length, simulation Loop Closing Operation, the access power of interruptible load on Alloy White Iron value during record each simulation Loop Closing Operation and the larger cyclization branch road of load; Until the access power of interruptible load is reduced to zero on the larger cyclization branch road of described load;
Obtain simulation Alloy White Iron minimum time described first cyclization branch road and described second cyclization branch road on the access power of interruptible load.
5. reduce a device for Alloy White Iron, it is characterized in that, comprising:
First acquiring unit, for the load power of the first cyclization end and the second cyclization end that obtain cyclization point; The first cyclization branch road that described first cyclization end is corresponding is connected with the first interruptible load, the second cyclization branch road that described second cyclization end is corresponding is connected with the second interruptible load, the load power of described first cyclization end comprises the access power of described first interruptible load, and the load power of described second cyclization end comprises the access power of described second interruptible load;
Second acquisition unit, for the expected load power of the first cyclization end time minimum according to pre-defined rule acquisition Alloy White Iron and the expected load power of the second cyclization end;
Adjustment unit, for the access power of the access power and/or described second interruptible load that adjust described first interruptible load, make described cyclization point two ends reach the expected load power of described first cyclization end and the expected load power of described second cyclization end respectively, thus make Alloy White Iron reach minimum;
Performance element, for performing Loop Closing Operation at described cyclization point.
6. the device of reduction Alloy White Iron according to claim 5, it is characterized in that, described according to pre-defined rule obtain Alloy White Iron minimum time the expected load power of the first cyclization end and the expected load power of the second cyclization end, comprise the access power of simulation described first interruptible load of adjustment and/or described second interruptible load, simulation Loop Closing Operation, acquisition makes Alloy White Iron minimum, or the load power of described first cyclization end when making Alloy White Iron trend towards minimum and described second cyclization end.
7. the device of reduction Alloy White Iron according to claim 5, is characterized in that, described second acquisition unit, comprising:
First analog submodule unit, for keeping the access power of described first interruptible load constant, the access power of described second interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of described second interruptible load; Until the access power of described second interruptible load is reduced to zero;
First obtains subelement, for obtain simulation Alloy White Iron value minimum time the access power of described second interruptible load;
Second analog submodule unit, the access power of described second interruptible load during for keeping simulation Alloy White Iron value minimum is constant, the access power of described first interruptible load is progressively reduced with predetermined step-length, simulation Loop Closing Operation, Alloy White Iron value during record each simulation Loop Closing Operation and the access power of described first interruptible load; Until the access power of described first interruptible load is reduced to zero;
Second obtains subelement, for obtain simulation Alloy White Iron value minimum time the access power of described first interruptible load;
First computation subunit, for the access power of described first interruptible load time minimum according to simulation Alloy White Iron value and the access power of described second interruptible load, the expected load power of described first cyclization end when calculating Alloy White Iron is minimum and the expected load power of described second cyclization end.
8. the device of reduction Alloy White Iron according to claim 5, is characterized in that, described second acquisition unit, also comprises:
Judgment sub-unit, for the one judging that in described first cyclization end and described second cyclization end, load power is larger;
3rd analog submodule unit, load power for the cyclization end keeping load power less is constant, the access power of the interruptible load of the larger cyclization end of load power is progressively reduced with predetermined step-length, simulation Loop Closing Operation, the access power of interruptible load on Alloy White Iron value during record each simulation Loop Closing Operation and the larger cyclization branch road of load; Until the access power of interruptible load is reduced to zero on the larger cyclization branch road of described load;
3rd obtains subelement, for obtain simulation Alloy White Iron minimum time described first cyclization branch road and described second cyclization branch road on the access power of interruptible load.
9. reduce a system for Alloy White Iron, comprise the first cyclization branch road at cyclization point two ends, the second cyclization branch road, it is characterized in that, described first cyclization branch road is connected with the first interruptible load, described second cyclization branch road is connected with the second interruptible load; Described system also comprises:
Interruptable-Load Management system, for managing access and the excision of described first interruptible load and/or the second interruptible load;
Cyclization controller, comprise the arbitrary described device of claim 5 to 8, be connected respectively with described first cyclization branch road, described second cyclization branch road and described Interruptable-Load Management system, by the access power of the access power and/or described second interruptible load that control the first interruptible load described in described Interruptable-Load Management system call interception.
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