CN115021275B - Distribution transformer operation method, device and medium - Google Patents
Distribution transformer operation method, device and medium Download PDFInfo
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- CN115021275B CN115021275B CN202210798118.8A CN202210798118A CN115021275B CN 115021275 B CN115021275 B CN 115021275B CN 202210798118 A CN202210798118 A CN 202210798118A CN 115021275 B CN115021275 B CN 115021275B
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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
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
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Abstract
The invention provides a distribution transformer operation method which is applied to two transformers which can only adopt a split operation mode. According to whether the transformer operates in the optimal economic operation range or not, when the economic operation range is not met, the loads of the two transformers which are mutually standby are divided equally, whether the two transformers with the load divided equally operate in the optimal economic range or not is calculated, and if the loads of the transformers operate in the optimal economic range, the loads of the transformers are switched according to the operation states of the loads of the two transformers and the adjustable load. And if the two transformers after load bisection do not operate in the optimal economic operation range, one transformer is ensured to operate in the optimal economic operation range by switching the loads. The operation method of the distribution transformer is suitable for transformers which are operated in a split mode, and when the operation mode of the transformers is not changed, the load of the transformers can be switched, so that at least one transformer can be operated in the optimal economic operation range.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a distribution transformer operation method, a distribution transformer operation device and a distribution transformer operation medium.
Background
The transformer is used as a main device for operating the power system, and generates loss in the process of converting voltage and transmitting power. The loss of the transformer generates nonlinear change along with the change of the load, and the loss of the transformer accounts for a larger proportion of line loss in a power grid, especially for a larger proportion under light load. According to statistics, the line loss of the transformer in the medium and low voltage power grid is about 2% -3%. Therefore, how to realize the energy-saving operation of the transformer and reduce the loss has very important significance.
At present, in a power supply system with two transformers, the existing method for energy-saving operation of a distribution transformer switches the operation modes of the transformers by calculating the load ratios or loss conditions of the two transformers, so that the transformers work in an economic operation state. However, in the petrochemical industry, the requirement of the electrical load on the power supply source needs to have two power sources for supplying power. Therefore, in order to ensure the reliability of power supply in the petrochemical industry, a power distribution system powered by two transformers requires that the two power distribution transformers need to adopt a split-row operation mode under normal conditions, and only under special conditions such as system switching operation or fault treatment, the short-time adoption of a single transformer operation mode or a parallel operation mode of the two transformers is allowed. In view of the above situation, the existing method for switching the operation mode of the transformer to achieve economic operation of the transformer is not suitable for petrochemical enterprises and power distribution systems thereof with the same requirements.
The background description provided herein is for the purpose of generally presenting the context of the disclosure. Unless otherwise indicated herein, the material described in this section is not prior art to the claims in this application and is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
In order to solve the technical problems in the related art, the invention provides a distribution transformer operation method which is applied to two transformers only adopting a split operation mode and comprises the following steps:
s1, respectively obtaining a first transformer load factor beta of a first transformer A and a second transformer B A Second transformer load factor beta B ；
S2, judging the load coefficient beta of the first transformer A And a second transformer load factor beta B Whether the current time is within the range of the optimal economic operation area;
s3, if the first transformer load factor beta A Or/and a second transformer load factor beta B If the load of the first transformer and the load of the second transformer are not in the optimal economic operation area range, a second load coefficient beta 'of the first transformer after the loads of the first transformer and the second transformer are equally divided is obtained' A And a third load coefficient beta 'of the second transformer' B ；
S4, judging the first transformationSecond load factor of vessel beta' A And a third load factor beta 'of the second transformer' B Whether the current position is within the range of the optimal economic operation area or not, if so, executing the step S5, otherwise, executing the step S6;
step S5, switching the loads of the first transformer and the second transformer according to the running states of a second adjustable load I 'ktA of the first transformer A, an adjustable load IktA of the first transformer A, a third adjustable load I' ktB of the second transformer B, an adjustable load IktB of the second transformer B and the adjustable loads of the first transformer A and the second transformer B;
s6, obtaining the optimal economic operation point load rate beta for enabling one of the first transformer A and the second transformer B to operate in the optimal economic range A Or beta B And switching the load of the first transformer A or the second transformer B according to the relation between the optimal economic operation current of the first transformer A or the second transformer B and the operation current of the first transformer A or the second transformer B.
Specifically, the step S3 specifically includes:
s31, obtaining the running current I 'of the first transformer A which equally divides the loads of the first transformer A and the second transformer B' A Running current I 'of a second transformer B' B ；
S32, calculating a second load factor beta 'of the transformer A, B in the case' A And a third load factor β' B 。
Specifically, the step S5 specifically includes:
s51, calculating the adjustable load IktA of the first transformer A and the adjustable load IktB of the second transformer B;
s52, calculating a fixed load IgdA of the first transformer A and a fixed load IgdB of the second transformer B;
s53, calculating a second adjustable load I 'ktA distributed to the first transformer A and a third adjustable load I' ktB distributed to the second transformer B;
s54, switching the loads of the first transformer and the second transformer according to the second adjustable load I 'ktA of the first transformer A, the adjustable load IktA of the first transformer A, the third adjustable load I' ktB of the second transformer B, the adjustable load IktB of the second transformer B and the operation states of the adjustable loads of the first transformer A and the second transformer B;
specifically, step S54 specifically includes:
s541, acquiring the running state of the adjustable load;
s542, if I 'ktA < IktA, switching part of the motors in the motors operated in the first transformer A to operate in a second transformer B, and enabling the difference value of I' ktA and IktA to be within a preset range;
and S543, if the I 'ktB is less than IktB, switching part of the motors in the motors running in the second transformer B to the first transformer A to run so that the difference value between I' ktB and IktB is within a preset range.
Specifically, step S6 further includes:
s61, calculating the load current of the first transformer A running at the optimal economic running point;
s62, if IzjA>I A In the motor running in the second transformer B, part of the motor is switched to the first transformer A to run I A The difference value with IzjA is in a preset range;
s63, if IzjA<I A In the motor running in the first transformer A, part of the motor is switched to the second transformer B to run I A The difference value with IzjA is within a preset range.
Another embodiment of the present invention discloses a distribution transformer operating device, which is applied to two transformers which can only adopt a split operation mode, and comprises the following units:
a transformer load obtaining unit for obtaining a first transformer load factor beta of the first transformer A and a second transformer B respectively A Second transformer load factor beta B ；
An optimal economic operation interval judgment unit for judging the load factor beta of the first transformer A And a second transformer load factor beta B Whether the current time is within the range of the optimal economic operation area;
a load obtaining unit after load halving for obtaining the load if the first change isTransformer load factor beta A Or/and a second transformer load factor beta B If the load of the first transformer and the load of the second transformer are not in the optimal economic operation area range, a second load coefficient beta 'of the first transformer after the load of the first transformer and the load of the second transformer are divided equally is obtained' A And a third load coefficient beta 'of the second transformer' B ；
The optimal economic operation interval judgment unit is used for judging a second load coefficient beta 'of the first transformer' A And a third load coefficient beta 'of the second transformer' B Whether the load is in the range of the optimal economic operation area or not, if so, executing a first load adjusting unit, and otherwise, executing a second load adjusting unit;
the first load adjusting unit is used for switching the loads of the first transformer and the second transformer according to the second adjustable load I 'ktA of the first transformer A, the adjustable load IktA of the first transformer A, the third adjustable load I' ktB of the second transformer B, the adjustable load IktB of the second transformer B and the operation states of the adjustable loads of the first transformer A and the second transformer B;
a second load adjusting unit for obtaining an optimal economic operation point load rate beta for operating one of the first transformer A or the second transformer B in an optimal economic range A Or beta B And switching the load of the first transformer A or the second transformer B according to the relation between the optimal economic operation current of the first transformer A or the second transformer B and the operation current of the first transformer A or the second transformer B.
Specifically, the load obtaining unit after load halving specifically includes:
a current obtaining unit for obtaining the running current I 'of the first transformer A for equally dividing the loads of the first transformer A and the second transformer B' A Running current I 'of a second transformer B' B ；
Post-load halving load factor calculation means for calculating second load factor β 'of transformer A, B in this case' A And a third load factor β' B 。
Specifically, the first load adjusting unit specifically includes:
the adjustable load obtaining unit is used for calculating the adjustable load IktA of the first transformer A and the adjustable load IktB of the second transformer B;
the fixed load obtaining unit is used for calculating a fixed load IgdA of the first transformer A and a fixed load IgdB of the second transformer B;
the distributable load acquisition unit is used for calculating a second adjustable load I 'ktA distributed to the first transformer A and a third adjustable load I' ktB distributed to the second transformer B;
the load switching unit is used for switching the loads of the first transformer and the second transformer according to the second adjustable load I 'ktA of the first transformer A, the adjustable load IktA of the first transformer A, the third adjustable load I' ktB of the second transformer B, the adjustable load IktB of the second transformer B and the operation states of the adjustable loads of the first transformer A and the second transformer B;
specifically, the load switching unit specifically includes:
the adjustable load operation state acquisition unit is used for acquiring the operation state of the adjustable load;
the first load switching unit is used for switching part of the motors in the motors running in the first transformer A to run to the second transformer B if the I 'ktA < IktA so that the difference value between I' ktA and IktA is within a preset range;
and the second load switching unit is used for switching part of the motors in the motors running in the second transformer B to run the first transformer A if the I 'ktB < IktB so that the difference value of I' ktB and IktB is within a preset range.
Specifically, the second load adjusting unit further includes:
the load current acquisition unit of the optimal economic operation area of the first transformer is used for calculating the load current of the first transformer A operating at the optimal economic operation point;
a third load switching unit for if IzjA>I A In the motor running in the second transformer B, part of the motor is switched to the first transformer A to run I A The difference with IzjA is oneWithin a preset range;
a fourth load switching unit for if IzjA<I A In the motor running in the first transformer A, part of the motor is switched to the second transformer B to run I A The difference value with IzjA is within a preset range.
According to whether the transformer operates in the optimal economic range or not, when the economic operation range is not met, the load of the two transformers which are mutually standby is divided equally, whether the two transformers with the load divided equally operate in the optimal economic range or not is calculated, and if the load of the transformers operates in the optimal economic range, the load of the transformers is switched according to the operation state of the loads of the two transformers and the adjustable load. And if the two transformers after load halving do not operate in the optimal economic operation range, one transformer is ensured to operate in the optimal economic operation range by switching the load. The operation method of the distribution transformer is suitable for transformers which are operated in a row mode, and when the operation mode of the transformers is not changed, the load switching can be carried out on the transformers, so that at least one transformer can operate in the optimal economic operation range.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of a transformer and a load structure of a distribution room according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the transformer and load of a power distribution room according to an embodiment of the present invention;
fig. 3 is a flow chart of a method for operating a distribution transformer according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an apparatus for operating a distribution transformer according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an operating apparatus of a distribution transformer according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
Example one
Referring to fig. 1, a wiring mode of A, B two-segment bus segmentation is adopted for primary buses of a distribution room in a distribution system of an enterprise such as a petrochemical industry, power supplies of A, B two-segment buses are respectively from a transformer A and a transformer B, and models and parameters of the transformer A and the transformer B are basically consistent. Meanwhile, in order to ensure the continuity of production, A, B are arranged in a plurality of motors to be mutually standby, the two motors are respectively supplied with power by A, B and two transformers, and the models and the parameters of the motors are basically consistent. Any one of the motors is normally opened, the other one is in a standby state and can be switched to an operating state at any time, and the operating currents of the two motors are basically consistent under the same working condition. In the figure, a motor A1 and a motor B1 are mutually standby, a motor A2 and a motor B2 are mutually standby, and the rest can be done in the same way; the fixed load A and the fixed load B are loads without standby equipment in the loads carried by the transformer A, B respectively.
Reference is made to FIG. 2,I A The current is the running current of the transformer A, the IgdA is the fixed load current carried by the transformer A, the IktA1 is the running current of the motor A1, the IktA2 is the running current of the motor A2, and the rest is the same; i is B The current is the running current of the transformer B, igdB is the fixed load current carried by the transformer B, iktB1 is the running current of the motor B1, iktB2 is the running current of the motor B2, and the rest is the same. IgdA and IgdB are unadjustable load currents, and other loads are adjustable loads, namely, the two A, B motors which are mutually standby can be used for starting the motor A and the motor B.
The present embodiment uses the transformer loss rate δ to measure the economic operation efficiency of the transformer, i.e. the smaller the transformer loss rate δ, the more economic the transformer operates.
In the formula:
δ: loss rate of transformer
P 0 : no-load loss of transformer
P k : short circuit loss of transformer
S N : rated capacity of transformer
Beta: transformer load current to rated current ratio, i.e. transformer load factor
In the above formula, P 0 、P k 、S N And
are all constants, the above formula can be abbreviated as
δ＝fx(β)
The derivation is such that the condition that δ is minimal is d δ/d β =0, resulting in β 2 *P k ＝P 0 Then, then
β＝(P 0 /P k ) -2
The economic operation of the transformer is therefore dependent on the load factor. When the transformer load factor is the square root of the ratio of its no-load loss to short-circuit loss, the transformer loss factor is the smallest and the efficiency is the highest, which is the economic operating condition of the transformer.
Referring to fig. 3, the present embodiment discloses a method for operating a distribution transformer, which is applied to two transformers that can only adopt a split-column operation mode, and includes the following steps:
s1, respectively obtaining first transformer load coefficients beta of a first transformer A and a second transformer B A Second transformer load factor beta B ；
Calculating the load factor beta of the transformer A, B A And beta B 。
β A ＝I A /InA (1)
In formula (1): I.C. A A Is the running current of the transformer A, and InA is the rated current of the transformer A
β B ＝I B /InB (2)
In formula (2): i is B Is the running current of the transformer B, inB is the rated current of the transformer B
S2, judging the load coefficient beta of the first transformer A And a second transformer load factor beta B Whether the current time is within the range of the optimal economic operation area;
GBT13462-2008 power transformer economic operation regulation: the upper limit load coefficient of the optimal economic operation area of the transformer is 0.75, and the lower limit load coefficient of the optimal economic operation area is 1.33 beta 2 JZ Wherein beta is JZ The power economic load factor is synthesized for the transformer.
If beta is A And beta B Within the optimal economic operating area, no adjustment is required.
S3, if the first transformer has the load factor beta A Or/and a second transformer load factor beta B If the load of the first transformer and the load of the second transformer are not in the optimal economic operation area range, a second load coefficient beta 'of the first transformer after the loads of the first transformer and the second transformer are equally divided is obtained' A And a third load factor beta 'of the second transformer' B ；
If beta is A And beta B If the optimum economic operation area is not reached, the operation is carried out in the following way.
S31, obtaining the running current I 'of the first transformer A which equally divides the loads of the first transformer A and the second transformer B' A Running current I 'of a second transformer B' B ；
I pj ＝I' A ＝I' B ＝(I A +I B )/2
S32, calculating a second load factor beta 'of the transformer A, B in the case' A And a third load factor beta' B ；
β' A ＝Ipj/InA
β' B ＝Ipj/InB
S33, judging the second load coefficient beta' A And a third load factor beta' B Whether it is within the optimum economic operation area.
GBT13462-2008 power transformer economic operation regulation: the upper limit load coefficient of the optimal economic operation area of the transformer is 0.75, and the lower limit load coefficient of the optimal economic operation area is 1.33 beta 2 JZ Wherein beta is JZ The power economic load factor is synthesized for the transformer.
S4, judging a second load coefficient beta 'of the first transformer' A And a third load factor beta 'of the second transformer' B Whether the current time is within the range of the optimal economic operation area or not is judged, if so, the step S5 is executed, and if not, the step S6 is executed;
step S5, switching the loads of the first transformer and the second transformer according to the running states of a second adjustable load I 'ktA of the first transformer A, an adjustable load IktA of the first transformer A, a third adjustable load I' ktB of the second transformer B, an adjustable load IktB of the second transformer B and the adjustable loads of the first transformer A and the second transformer B;
if β 'A and β' B are within the optimum economic operating region, the following procedure is followed.
S51, calculating the adjustable load IktA of the first transformer A and the adjustable load IktB of the second transformer B;
adjustable load of transformer a: iktA = IktA1+ IktA2+ … … + Iktan
Adjustable load of transformer B: iktB = IktB1+ IktB2+ … … + IktBN
Total adjustable load of two transformers: ikt Total = IktA + IktB
S52, calculating a fixed load IgdA of the first transformer A and a fixed load IgdB of the second transformer B;
fixed load of transformer a: igdA = IA-IktA
Fixed load of transformer B: igdB = IB-IktB
S53, calculating a second adjustable load I 'ktA distributed to the first transformer A and a third adjustable load I' ktB distributed to the second transformer B;
adjustable load assigned to transformer a: i' ktA = Ipj-IktA
Adjustable load assigned to transformer B: i' ktB = Ipj-IktB
S54, switching the loads of the first transformer and the second transformer according to the second adjustable load I 'ktA of the first transformer A, the adjustable load IktA of the first transformer A, the third adjustable load I' ktB of the second transformer B, the adjustable load IktB of the second transformer B and the operation states of the adjustable loads of the first transformer A and the second transformer B;
the method specifically comprises the following steps:
s541, acquiring the running state of the adjustable load;
by judging the running currents IktA1 … … Iktan and IktB1 … … IktSn of the motors A1 … … An and B1 … … Bn, if the current is 0, the motor is judged to be not running, and if the current is more than 0, the motor is judged to be running. The running devices are marked as Ax1 … … Axn and Bx1 … … Bxn, and only the running motor (Ax or Bx) and the motor (Bx or Ax) which is standby with the running motor participate in the subsequent regulation.
S542. If I' ktA < IktA, in the running motors of Ax1 … … Axn, part of the motor is
The motor is switched to B to operate, so that I' ktA and IktA are as close as possible;
s543, if I 'ktB < IktB, in the running motors Bx1 … … Bxn, switching part of the motors to A running to enable I' ktB to be as close to IktB as possible.
S6, obtaining the optimal economic operation point load rate beta for enabling one of the first transformer A and the second transformer B to operate in the optimal economic range A Or beta B And switching the load of the first transformer A or the second transformer B according to the relation between the optimal economic operation current of the first transformer A or the second transformer B and the operation current of the first transformer A or the second transformer B.
In step S4, if β 'a and β' B are not within the range of the optimal economic operation region, in this case, it is first ensured that one transformer operates at the optimal economic operation point (taking transformer a as an example), and the following procedure is performed.
S61, calculating the load current of the first transformer A operating at the optimal economic operating point
Optimum economic operating point load rate: beta is a beta A ＝(P 0 /P k ) -2
The load current of the transformer is the optimal economic operation current at the moment: izjA = inab β a
S62, if IzjA>I A Then, in the motors with Bx1 … … Bxn running, part of the motors are switched to A running to make I run A As close as possible to IzjA;
of the present embodiment A As close as possible to IzjA, a range of difference values may be preset, as long as I A The difference value with IzjA is within a preset range. In the same way as possible, the following is also expressed using a range of differences.
S63, if IzjA<I A In the motors with Ax1 … … Axn running, part of the motors are switched to B running to make I run A As close as possible to IzjA. The operating current I of the transformer B is taken into account B It cannot exceed its rated current InB.
According to the method, two transformer loads which are mutually standby are divided equally firstly according to whether the transformer operates in the optimal economic range or not and when the economic operation range is not met, whether the two transformers with the load divided equally operate in the optimal economic operation range or not is calculated, and if the two transformers operate in the optimal economic operation range, the loads of the transformers are switched according to the operation states of the loads of the two transformers and the adjustable load. And if the two transformers after load halving do not operate in the optimal economic operation range, one transformer is ensured to operate in the optimal economic operation range by switching the load. The operation method of the distribution transformer is suitable for transformers which are operated in a split mode, and when the operation mode of the transformers is not changed, load switching can be performed on the transformers, so that at least one transformer can operate in the optimal economic operation range.
Example two
Referring to fig. 4, the present embodiment discloses a distribution transformer operating apparatus, which is applied to two transformers that can only adopt a split operation mode, and includes the following units:
a transformer load obtaining unit for obtaining a first transformer load factor beta of the first transformer A and a second transformer B respectively A Second transformer load factor beta B ；
An optimal economic operation interval judgment unit for judging the load factor beta of the first transformer A And a second transformer load factor beta B Whether the current time is within the range of the optimal economic operation area;
a load obtaining unit after load halving for obtaining the load factor beta of the first transformer A Or/and a second transformer load factor beta B If the load of the first transformer and the load of the second transformer are not in the optimal economic operation area range, a second load coefficient beta 'of the first transformer after the loads of the first transformer and the second transformer are equally divided is obtained' A And a third load coefficient beta 'of the second transformer' B ；
The optimal economic operation interval judgment unit after load halving is used for judging a second load coefficient beta 'of the first transformer' A And a third load factor beta 'of the second transformer' B Whether the current load is in the range of the optimal economic operation area or not, if so, executing a first load adjusting unit, and if not, executing a second load adjusting unit;
the first load adjusting unit is used for switching the loads of the first transformer and the second transformer according to the operation states of a second adjustable load I 'ktA of the first transformer A, an adjustable load IktA of the first transformer A, a third adjustable load I' ktB of the second transformer B, an adjustable load IktB of the second transformer B and the adjustable loads of the first transformer A and the second transformer B;
a second load adjusting unit for obtaining an optimal economic operation point load rate beta for operating one of the first transformer A or the second transformer B in an optimal economic range A Or beta B According to the relation between the optimal economic operation current of the first transformer A or the second transformer B and the operation current of the first transformer A or the second transformer B, the negative voltage of the first transformer A or the second transformer B is appliedThe load is switched.
Specifically, the load obtaining unit after load halving specifically includes:
a current obtaining unit for obtaining the running current I 'of the first transformer A for equally dividing the loads of the first transformer A and the second transformer B' A Running current I 'of a second transformer B' B ；
Post-load halving load factor calculation means for calculating second load factor β 'of transformer A, B in this case' A And a third load factor β' B 。
Specifically, the first load adjusting unit specifically includes:
the adjustable load obtaining unit is used for calculating the adjustable load IktA of the first transformer A and the adjustable load IktB of the second transformer B;
the fixed load obtaining unit is used for calculating a fixed load IgdA of the first transformer A and a fixed load IgdB of the second transformer B;
the system comprises an allocable load acquisition unit, a third adjustable load I ' ktB, a second adjustable load I ' ktA and a third adjustable load I ' ktB, wherein the second adjustable load I ' 5363 and the third adjustable load I ' 3242 are distributed to a first transformer A;
the load switching unit is used for switching the loads of the first transformer and the second transformer according to the second adjustable load I 'ktA of the first transformer A, the adjustable load IktA of the first transformer A, the third adjustable load I' ktB of the second transformer B, the adjustable load IktB of the second transformer B and the operation states of the adjustable loads of the first transformer A and the second transformer B;
specifically, the load switching unit specifically includes:
the adjustable load operation state acquisition unit is used for acquiring the operation state of the adjustable load;
the first load switching unit is used for switching part of the motors in the motors running in the first transformer A to run to the second transformer B if the I 'ktA < IktA so that the difference value between I' ktA and IktA is within a preset range;
and the second load switching unit is used for switching part of the motors in the motors operated in the second transformer B to operate the first transformer A if the I 'ktB < IktB so that the difference value of the I' ktB and the IktB is within a preset range.
Specifically, the second load adjusting unit further includes:
the load current acquisition unit is used for calculating the load current of the first transformer A running at the optimal economic running point;
a third load switching unit for if IzjA>I A In the motor running in the second transformer B, part of the motor is switched to the first transformer A to run I A The difference value with IzjA is in a preset range;
a fourth load switching unit for if IzjA<I A In the motor running in the first transformer A, part of the motor is switched to the second transformer B to run I A The difference value with IzjA is within a preset range.
According to the method, two transformer loads which are mutually standby are divided equally firstly according to whether the transformer operates in the optimal economic range or not and when the economic operation range is not met, whether the two transformers with the load divided equally operate in the optimal economic operation range or not is calculated, and if the two transformers operate in the optimal economic operation range, the loads of the transformers are switched according to the operation states of the loads of the two transformers and the adjustable load. And if the two transformers after load halving do not operate in the optimal economic operation range, one transformer is ensured to operate in the optimal economic operation range by switching the load. The operation method of the distribution transformer is suitable for transformers which are operated in a split mode, and when the operation mode of the transformers is not changed, load switching can be performed on the transformers, so that at least one transformer can operate in the optimal economic operation range.
EXAMPLE III
Referring to fig. 5, fig. 5 is a schematic structural diagram of an image enhancement apparatus of the present embodiment. The image enhancement device 20 of this embodiment comprises a processor 21, a memory 22 and a computer program stored in said memory 22 and executable on said processor 21. The processor 21 realizes the steps in the above-described method embodiments when executing the computer program. Alternatively, the processor 21 implements the functions of the modules/units in the above-described device embodiments when executing the computer program.
Illustratively, the computer program may be divided into one or more modules/units, which are stored in the memory 22 and executed by the processor 21 to accomplish the present invention. The one or more modules/units may be a series of computer program instruction segments capable of performing specific functions, which are used to describe the execution of the computer program in the image enhancement device 20. For example, the computer program may be divided into the modules in the second embodiment, and for the specific functions of the modules, reference is made to the working process of the apparatus in the foregoing embodiment, which is not described herein again.
The image enhancement device 20 may include, but is not limited to, a processor 21, a memory 22. It will be appreciated by those skilled in the art that the schematic diagram is merely an example of the image enhancement device 20 and does not constitute a limitation of the image enhancement device 20 and may include more or less components than shown, or combine certain components, or different components, for example, the image enhancement device 20 may also include an input-output device, a network access device, a bus, etc.
The Processor 21 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, and the processor 21 is the control center of the image enhancing apparatus 20 and connects the various parts of the entire image enhancing apparatus 20 by various interfaces and lines.
The memory 22 may be used for storing the computer programs and/or modules, and the processor 21 implements various functions of the image enhancement device 20 by running or executing the computer programs and/or modules stored in the memory 22 and calling data stored in the memory 22. The memory 22 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. In addition, the memory 22 may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.
Wherein, the integrated module/unit of the image enhancement device 20 can be stored in a computer readable storage medium if it is implemented in the form of software functional unit and sold or used as a stand-alone product. Based on such understanding, all or part of the flow of the method according to the above embodiments may be implemented by a computer program, which may be stored in a computer readable storage medium and used by the processor 21 to implement the steps of the above embodiments of the method. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer-readable medium may contain suitable additions or subtractions depending on the requirements of legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer-readable media may not include electrical carrier signals or telecommunication signals in accordance with legislation and patent practice.
It should be noted that the above-described embodiments of the apparatus are merely illustrative, where the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.
Claims (8)
1. A distribution transformer operation method is applied to two transformers which only adopt a split operation mode, and comprises the following steps:
s1, respectively obtaining first transformer load coefficients beta of a first transformer A and a second transformer B A Second transformer load factor beta B；
S2, judging the load coefficient beta of the first transformer A And a second transformer load factor beta B Whether the current time is within the range of the optimal economic operation area;
s3, if the first transformer load factor beta A Or/and a second transformer load factor beta B If the load of the first transformer and the load of the second transformer are not in the optimal economic operation area range, a second load coefficient beta 'of the first transformer after the loads of the first transformer and the second transformer are equally divided is obtained' A And a third load factor beta 'of the second transformer' B (ii) a The step S3 specifically includes:
s31, obtaining the running current I 'of the first transformer A which equally divides the loads of the first transformer A and the second transformer B' A And an operating current I 'of the second transformer B' B ；
S32, calculating a second load factor beta 'of the transformer A, B in the case' A And a third load factor β' B ；
S4, judging a second load coefficient beta 'of the first transformer' A And a third load factor beta 'of the second transformer' B Whether the current time is within the range of the optimal economic operation area or not is judged, if so, the step S5 is executed, and if not, the step S6 is executed;
step S5, switching the loads of the first transformer and the second transformer according to the running states of a second adjustable load I 'ktA of the first transformer A, an adjustable load IktA of the first transformer A, a third adjustable load I' ktB of the second transformer B, an adjustable load IktB of the second transformer B and the adjustable loads of the first transformer A and the second transformer B;
s6, obtaining the optimal economic operation point load rate beta for enabling one of the first transformer A and the second transformer B to operate in the optimal economic range A Or beta B And switching the load of the first transformer A or the second transformer B according to the relation between the optimal economic operation current of the first transformer A or the second transformer B and the operation current of the first transformer A or the second transformer B.
2. The method according to claim 1, wherein the step S5 specifically comprises:
s51, calculating the adjustable load IktA of the first transformer A and the adjustable load IktB of the second transformer B;
s52, calculating a fixed load IgdA of the first transformer A and a fixed load IgdB of the second transformer B;
s53, calculating a second adjustable load I 'ktA distributed to the first transformer A and a third adjustable load I' ktB distributed to the second transformer B;
and S54, switching the loads of the first transformer and the second transformer according to the second adjustable load I 'ktA of the first transformer A, the adjustable load IktA of the first transformer A, the third adjustable load I' ktB of the second transformer B, the adjustable load IktB of the second transformer B and the operation states of the adjustable loads of the first transformer A and the second transformer B.
3. The method according to claim 2, wherein step S54 specifically comprises:
s541, acquiring the running state of the adjustable load;
s542, if I 'ktA < IktA, switching part of the motors in the motors running in the first transformer A to run by a second transformer B, and enabling the difference value between I' ktA and IktA to be within a preset range;
s543, if I 'ktB < IktB, in the motors running in the second transformer B, part of the motors are switched to run in the first transformer A, and the difference value between I' ktB and IktB is within a preset range.
4. The method of claim 1, step S6 further comprising:
s61, calculating the load current of the first transformer A running at the optimal economic running point;
s62, if IzjA>I A In the motor running in the second transformer B, part of the motor is switched to the first transformer A to run I A The difference value with IzjA is in a preset range; wherein I A Is the operating current of the first transformer A, and IzjA is the optimal economic operating current of the first transformer A;
s63, if IzjA<I A In the motor running in the first transformer A, part of the motor is switched to the second transformer B to run I A The difference value with IzjA is within a preset range.
5. A distribution transformer operation device is applied to two transformers which only can adopt a split operation mode, and comprises the following units:
a transformer load obtaining unit for obtaining a first transformer load factor beta of the first transformer A and the second transformer B respectively A A second transformerLoad factor beta B ；
An optimum economic operation interval judgment unit for judging the load factor beta of the first transformer A And a second transformer load factor beta B Whether the current time is within the range of the optimal economic operation area;
a load obtaining unit after load halving for obtaining the load factor beta of the first transformer A Or/and a second transformer load factor beta B If the load of the first transformer and the load of the second transformer are not in the optimal economic operation area range, a second load coefficient beta 'of the first transformer after the loads of the first transformer and the second transformer are equally divided is obtained' A And a third load factor beta 'of the second transformer' B (ii) a The load obtaining unit after load halving specifically includes:
a current obtaining unit for obtaining the running current I 'of the first transformer A for equally dividing the loads of the first transformer A and the second transformer B' A Running current I 'of a second transformer B' B ；
Post-load halving load factor calculation means for calculating second load factor β 'of transformer A, B in this case' A And a third load factor β' B (ii) a The optimal economic operation interval judgment unit is used for judging a second load coefficient beta 'of the first transformer' A And a third load factor beta 'of the second transformer' B Whether the load is in the range of the optimal economic operation area or not, if so, executing a first load adjusting unit, and otherwise, executing a second load adjusting unit;
the first load adjusting unit is used for switching the loads of the first transformer and the second transformer according to the operation states of a second adjustable load I 'ktA of the first transformer A, an adjustable load IktA of the first transformer A, a third adjustable load I' ktB of the second transformer B, an adjustable load IktB of the second transformer B and the adjustable loads of the first transformer A and the second transformer B;
a second load adjusting unit for obtaining an optimal economic operation point load ratio beta for operating one of the first transformer A or the second transformer B in an optimal economic range A Or beta B According to the first transformer A or the second transformerThe relationship between the optimal economic operation current of the transformer B and the operation current of the first transformer A or the second transformer B switches the load of the first transformer A or the second transformer B.
6. The apparatus of claim 5, wherein the first load adjustment unit specifically comprises:
the adjustable load obtaining unit is used for calculating the adjustable load IktA of the first transformer A and the adjustable load IktB of the second transformer B;
the fixed load acquisition unit is used for calculating a fixed load IgdA of the first transformer A and a fixed load IgdB of the second transformer B;
the distributable load acquisition unit is used for calculating a second adjustable load I 'ktA distributed to the first transformer A and a third adjustable load I' ktB distributed to the second transformer B;
the load switching unit is used for switching the loads of the first transformer and the second transformer according to the second adjustable load I 'ktA of the first transformer A, the adjustable load IktA of the first transformer A, the third adjustable load I' ktB of the second transformer B, the adjustable load IktB of the second transformer B and the operation states of the adjustable loads of the first transformer A and the second transformer B.
7. The apparatus of claim 6, wherein the load switching unit specifically comprises:
the adjustable load operation state acquisition unit is used for acquiring the operation state of the adjustable load;
the first load switching unit is used for switching part of the motors in the motors running in the first transformer A to the second transformer B to run if I 'ktA < IktA, so that the difference value between I' ktA and IktA is within a preset range;
and the second load switching unit is used for switching part of the motors in the motors running in the second transformer B to run the first transformer A if the I 'ktB < IktB so that the difference value of I' ktB and IktB is within a preset range.
8. The apparatus of claim 5, the second load adjustment unit further comprising:
the load current acquisition unit is used for calculating the load current of the first transformer A running at the optimal economic running point;
a third load switching unit for if IzjA>I A In the motor running in the second transformer B, part of the motor is switched to the first transformer A to run I A The difference value with IzjA is in a preset range; wherein I A Is the operating current of the first transformer A, and IzjA is the optimal economic operating current of the first transformer A;
a fourth load switching unit for if IzjA<I A In the motor running in the first transformer A, part of the motor is switched to the second transformer B to run I A The difference value with IzjA is within a preset range.
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| CN202210798118.8A CN115021275B (en) | 2022-07-06 | 2022-07-06 | Distribution transformer operation method, device and medium |
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| CN202210798118.8A CN115021275B (en) | 2022-07-06 | 2022-07-06 | Distribution transformer operation method, device and medium |
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| CN102890450A (en) * | 2012-09-27 | 2013-01-23 | 安徽省电力公司 | On-line transformer economic operation optimization platform |
| CN111310980B (en) * | 2020-01-20 | 2023-10-13 | 长沙理工大学 | Distribution transformer optimization method considering load distribution and economic operation interval dynamic reconstruction |
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