CN109345147B - Method, system and device for evaluating operation efficiency of power distribution network transformer - Google Patents
Method, system and device for evaluating operation efficiency of power distribution network transformer Download PDFInfo
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Abstract
The invention discloses an evaluation method of the operation efficiency of a distribution network transformer, which comprises the following steps: acquiring equipment parameters and a safe operation load coefficient of the transformer; calculating to obtain the economic operation load of the transformer according to the equipment parameters; calculating to obtain the safe operation load of the transformer according to the safe operation load coefficient; and calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load. The assessment method comprehensively considers the special requirements of the economical efficiency and safety of the power distribution network on the load capacity of the transformer, can realize scientific assessment of the operation efficiency of the transformer, and improves the assessment quality. The invention also provides a system and a device for evaluating the running efficiency of the distribution network transformer and a computer readable storage medium, which have the technical effects.
Description
Technical Field
The invention relates to the technical field of power distribution networks, in particular to an evaluation method for the running efficiency of a transformer of a power distribution network; the utility model also relates to an evaluation system, device and computer readable storage medium of distribution network transformer operating efficiency.
Background
In recent years, the planning and development of power distribution networks have been changed from extensive to intensive, and power distribution network operation efficiency and economy are closely related, so that the power distribution networks are more and more concerned. The transformer is used as the main equipment of the power distribution network, and the operation efficiency of the transformer is directly related to the economic level and the management level of the power distribution network. Due to the influence of various factors such as economic environment, grid structure, regional characteristics and the like, part of transformers run under light load for a long time, and part of transformers run under heavy overload, so that the transformers cannot be reasonably applied, the loss is high, the operation cost of a power distribution network is increased, and the evaluation of the operation efficiency of the transformers becomes more important.
At present, the load rate of a transformer is mainly adopted, the utilization condition of the transformer is evaluated by calculating the ratio of the actual power and the rated power of the transformer, and an operation efficiency evaluation index system is constructed by combining the average load rate and the maximum load rate. Due to the fact that the geographic positions of the transformers are different and the function setting is inconsistent, the load bearing rates of the transformers are inconsistent, and the operation efficiency of the transformers cannot be scientifically judged by the existing evaluation mode.
In view of this, how to provide a scientific and reasonable evaluation scheme for the operation efficiency of the transformer is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a method, a system and a device for evaluating the operation efficiency of a distribution network transformer and a computer readable storage medium, which can evaluate the operation efficiency of the transformer more scientifically and reasonably and improve the evaluation quality.
In order to solve the technical problem, the invention provides an evaluation method of the operation efficiency of a distribution network transformer, which comprises the following steps:
acquiring equipment parameters and a safe operation load coefficient of the transformer;
calculating to obtain the economic operation load of the transformer according to the equipment parameters;
calculating to obtain the safe operation load of the transformer according to the safe operation load coefficient;
and calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load.
Optionally, obtaining the safe operation load factor of the transformer includes:
acquiring a safety criterion of a power supply area where the transformer is located and a transformer substation interconnection relation; the transformer substation interconnection relationship comprises the number of interconnected transformer substations and the number of transformers in each transformer substation;
and looking up a table to obtain the safe operation load coefficient according to the safety criterion and the transformer substation interconnection relation.
Optionally, the calculating the economic operation load of the transformer according to the device parameter includes:
by passing
Obtaining the economic operation load;
wherein, the PeFor the economic operation load, x is a proportional coefficient of initial investment and transformer capacity, y is the number of years of compensation, and ThFor run time, said ErFor electricity price, the P0For no load loss, said PkFor short-circuit losses, said PNIs rated capacity.
Optionally, the calculating the safe operation load of the transformer according to the safe operation load coefficient includes:
by Ps＝λPNCalculating to obtain the safe operation load;
wherein λ is the safe operation load factor, PsThe load is operated safely.
Optionally, the calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load includes:
collecting total load data of the transformer in a preset time period;
dividing the preset time period into unit time periods with preset number, and correspondingly obtaining load data of the transformers in the unit time periods;
by passing
Respectively obtaining the unit operation efficiency of the transformer in each unit time period;
by passing
Calculating to obtain the operation efficiency of the transformer in the preset time period;
wherein, the alpha is an economic efficiency coefficient, the beta is a safety efficiency coefficient, and the L isiFor load data of said transformer in said unit time period, said ηiThe unit operation efficiency is defined as eta, and the M is the preset number.
Optionally, the method further includes:
adjusting the economic efficiency coefficient and/or the safety efficiency coefficient.
In order to solve the technical problem, the invention also provides an evaluation system for the operation efficiency of the distribution network transformer, which comprises:
the acquisition module is used for acquiring equipment parameters and safe operation load coefficients of the transformer;
the economic operation load calculation module is used for calculating the economic operation load of the transformer according to the equipment parameters;
the safe operation load calculation module is used for calculating to obtain the safe operation load of the transformer according to the safe operation load coefficient;
and the operation efficiency calculation module is used for calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load.
Optionally, the method further includes:
and the adjusting module is used for adjusting the economic efficiency coefficient and/or the safety efficiency coefficient.
In order to solve the above technical problem, the present invention further provides an evaluation apparatus for operation efficiency of a distribution network transformer, including:
a memory for storing a computer program;
a processor for implementing the steps of the method for evaluating the operation efficiency of the transformer of the power distribution network according to any one of the above mentioned items when the computer program is executed.
In order to solve the technical problem, the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for evaluating the operating efficiency of a distribution network transformer according to any one of the above.
The invention provides an evaluation method of the operation efficiency of a distribution network transformer, which comprises the following steps: acquiring equipment parameters and a safe operation load coefficient of the transformer; calculating to obtain the economic operation load of the transformer according to the equipment parameters; calculating to obtain the safe operation load of the transformer according to the safe operation load coefficient; and calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load.
Obviously, compared with the traditional evaluation scheme, the evaluation method for the operation efficiency of the power distribution network transformer provided by the invention obtains the economic operation load of the transformer according to the equipment parameters of the transformer; obtaining the safe operation load of the transformer according to the safe operation load coefficient of the transformer; further, the operation economy and the safety of the transformer are integrated, the economic operation load and the safe operation load are used as the judgment reference of the operation efficiency of the transformer, and the operation efficiency of the transformer is obtained according to the economic operation load and the safe operation load. The assessment method fully considers the safety criterion of the distribution area where the transformer is located, can effectively avoid the influence of the standby capacity of the transformer on the operation efficiency, comprehensively considers the special requirements of the operation economy and safety of the power distribution network on the load capacity of the transformer, can realize scientific assessment of the operation efficiency of the transformer, and improves the assessment quality.
The evaluation system and device for the operation efficiency of the distribution network transformer and the computer readable storage medium have the technical effects.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and 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 flow chart of a method for evaluating the operation efficiency of a distribution network transformer according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a transformer substation interconnection relationship provided in an embodiment of the present invention;
fig. 3 is a schematic diagram of a load curve of a transformer according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an evaluation system for operation efficiency of a distribution network transformer according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an evaluation apparatus for operation efficiency of a distribution network transformer according to an embodiment of the present invention.
Detailed Description
The core of the invention is to provide a method, a system and a device for evaluating the operation efficiency of a distribution network transformer and a computer readable storage medium, which can evaluate the operation efficiency of the transformer more scientifically and reasonably and improve the evaluation quality.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The traditional evaluation mode does not pay attention to the special requirements of the operation safety and the economical efficiency of the power distribution network on the actual load, does not consider the influence of the safety criterion of the power distribution network, neglects the requirement of the reserve capacity of a transformer of the power distribution network, and takes the rated capacity as the upper limit of the actual load capacity of the transformer, so that the load rate is low and the asset utilization condition of the transformer cannot be truly and objectively reflected; in addition, the economic operation point of the transformer is not clear, and the operation efficiency of the transformer in the whole life cycle is reduced due to the overlarge load rate, so that the operation efficiency of the transformer cannot be reasonably evaluated in a long period. Therefore, in order to solve the technical defects, the application provides the method for evaluating the operation efficiency of the transformer of the power distribution network, the special requirements of the operation economy and safety of the power distribution network on the load capacity of the transformer are comprehensively considered, the scientific evaluation of the operation efficiency of the transformer can be realized, and the evaluation quality is improved.
Referring to fig. 1, fig. 1 is a schematic flow chart illustrating a method for evaluating the operation efficiency of a distribution network transformer according to an embodiment of the present invention; as can be seen in fig. 1, the evaluation method may include:
s100: acquiring equipment parameters and a safe operation load coefficient of the transformer;
specifically, the step aims to obtain the equipment parameters and the safe operation load coefficient, and provides a calculation basis for obtaining the economic operation load and the safe operation load subsequently. Specifically, the equipment parameters of the transformer, including the rated capacity, no-load loss, short-circuit loss, the proportional coefficient of initial investment and transformer capacity, the number of years of compensation, the electricity price and the running time of the transformer, can be collected from the power distribution network production management system. Of course, the number and type of the above-mentioned equipment parameters are only one embodiment provided by the present invention, and are not limited only, and may be selected differently according to actual needs.
In addition, in a specific embodiment, obtaining the safe operation load factor of the transformer may include: acquiring a safety criterion of a power supply area where a transformer is located and a transformer substation interconnection relation; the transformer substation interconnection relationship comprises the number of interconnected transformer substations and the number of transformers in each transformer substation; and looking up a table to obtain the safe operation load coefficient according to the interconnection relation between the safety criterion and the transformer substation.
Specifically, the safe operation load factor of the transformer is related to the safety criterion of the power supply area where the transformer is located, the number of interconnected substations, and the number of transformers in each substation, so that the corresponding relationship between the safe operation load factor of the transformer and the safety criterion of the power supply area where the transformer is located, the number of interconnected substations, and the number of transformers in each substation can be stored in a list in advance, as shown in table 1:
TABLE 1 safe running load factor table
| Number of interconnected substations | Number of transformers | Safety guidelines | Safe operating |
| 2 | 2 | N-1 | 0.750 |
| 2 | 3 | N-1 | 0.500 |
| 2 | 2 | N-2 | 0.833 |
| 2 | 3 | N-2 | 0.667 |
| 3 | 2 | N-1 | 0.825 |
| 3 | 3 | N-1 | 0.667 |
| 3 | 2 | N-2 | 0.889 |
| 3 | 3 | N-2 | 0.757 |
| 4 | 2 | N-1 | 0.860 |
| 4 | 3 | N-1 | 0.750 |
| 4 | 2 | N-2 | 0.916 |
| 4 | 3 | N-2 | 0.800 |
After the safety criterion of the transformer area and the transformer substation interconnection relation are obtained from the distribution network automation system, the corresponding safe operation load coefficient can be obtained in a table look-up mode according to the safety criterion and the transformer substation interconnection relation.
S200: calculating according to the equipment parameters to obtain the economic operation load of the transformer;
specifically, on the basis of obtaining the equipment parameters of the transformer, the economic operation load of the transformer is further obtained through calculation according to the obtained equipment parameters.
Optionally, the step of calculating the economic operation load of the transformer according to the device parameters may include: by passing
Obtaining an economic operation load;
wherein, PeFor economic operation load, χ is the proportional coefficient of initial investment and transformer capacity, y is the number of years compensated, ThFor run time, ErTo the electricity price, P0For no-load losses, PkFor short-circuit losses, PNIs rated capacity.
Specifically, the present embodiment adopts the principle of minimum cost consumption during the operation of the transformer to accurately estimate the economic load of the transformer and provide an economic reference value of the operation power of the transformer. Specifically, the obtained equipment parameters are substituted into
And calculating to obtain the economic operation load of the transformer.
S300: calculating to obtain the safe operation load of the transformer according to the safe operation load coefficient;
specifically, on the basis of obtaining the safe operation load coefficient of the transformer, the safe operation load of the transformer is further obtained through calculation according to the safe operation load coefficient.
Optionally, the calculating the safe operation load of the transformer according to the safe operation load coefficient may include: by Ps＝λPNCalculating to obtain a safe operation load; wherein λ is the safe operation load factor, PsTo run the load safely.
Specifically, the embodiment provides a simpler way of calculating the safe operation load, so that the operation efficiency of the transformer can be scientifically and reasonably evaluated, the calculation operation is simplified, and the evaluation efficiency is improved. In particular toSubstituting the obtained safe operation load coefficient and the rated capacity of the transformer into Ps＝λPNAnd calculating to obtain the safe operation load of the transformer, namely, obtaining the safe operation load of the transformer by taking the product of the safe operation load coefficient of the transformer and the rated capacity of the transformer. Wherein, PsFor safe operation load, λ is the safe operation load factor, PNIs rated capacity.
S400: and calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load.
Specifically, after the economic operation load and the safe operation load of the transformer are obtained through the above operations, the operation efficiency of the transformer can be calculated according to the economic operation load and the safe operation load.
Optionally, the calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load may include: collecting total load data of the transformer in a preset time period; dividing the preset time period into unit time periods with preset number, and correspondingly obtaining load data of the transformer in the unit time periods;
by passing
Respectively obtaining the unit operation efficiency of the transformer in each unit time period; by passing
Calculating to obtain the operation efficiency of the transformer in a preset time period;
wherein, alpha is an economic efficiency coefficient, beta is a safety efficiency coefficient, and LiLoad data, η, for the transformer in a unit time periodiIs the unit operating efficiency, eta is the operating efficiency, and M is the preset number.
Specifically, total load data of the transformer in a preset time period can be collected from the power distribution network energy management system; further dividing the preset time period into unit time periods with preset number, and correspondingly obtaining load data of the transformer in each unit time period; wherein, forThe specific duration of the preset time period and the specific numerical value of the preset number are not limited uniquely, and the difference setting can be carried out according to the actual situation. For example, the preset time period may be set to 1 year, and the preset number may be set to 365, that is, the preset time period having the duration of 1 year is divided into 365 unit time periods, and the duration of each unit time period is 1 day. And then pass through
Respectively obtaining the unit operation efficiency of the transformer in each unit time period, and further passing through
And calculating to obtain the operating efficiency of the transformer in the whole preset time period.
The specific values of the economic efficiency coefficient alpha and the safe efficiency coefficient beta are not limited uniquely, and appropriate values can be set according to actual needs.
In summary, according to the evaluation method for the operation efficiency of the power distribution network transformer provided by the invention, the economic operation load of the transformer is obtained according to the equipment parameters of the transformer; obtaining the safe operation load of the transformer according to the safe operation load coefficient of the transformer; further, the operation economy and the safety of the transformer are integrated, the economic operation load and the safe operation load are used as the judgment reference of the operation efficiency of the transformer, and the operation efficiency of the transformer is obtained according to the economic operation load and the safe operation load. The assessment method fully considers the safety criterion of the distribution area where the transformer is located, can effectively avoid the influence of the standby capacity of the transformer on the operation efficiency, comprehensively considers the special requirements of the operation economy and safety of the power distribution network on the load capacity of the transformer, can realize scientific assessment of the operation efficiency of the transformer, and improves the assessment quality.
On the basis of the above embodiment, optionally, the evaluation method further includes: the economic efficiency coefficient and/or the safety efficiency coefficient are adjusted.
In particular, for better trade-off between economy and safetyThe evaluation quality is further provided by the influence of the running efficiency of the transformer, and the economic efficiency coefficient and/or the safety efficiency coefficient can be adjusted by the evaluation method. If the load data of the transformer in the unit time slot is positioned
In the optimal operation economic interval of the transformer, the operation economic performance of the transformer has great influence on the operation efficiency, so that the economic efficiency coefficient can be adjusted to a large value, and if the load data of the transformer in unit time period is in other intervals, the safety efficiency coefficient can be increased. In the process of evaluating the operating efficiency of the transformer, the evaluation rationality can be further increased and the evaluation quality can be improved by dynamically adjusting the economic efficiency coefficient and the safe efficiency coefficient.
The following illustrates the implementation of the evaluation method by means of a specific example:
an enterprise uses 1 special transformer of 10/0.4kV 1000kVA, and the no-load loss P of the transformer04.5kW, short-circuit loss Pk14kW, rated capacity PNThe power factor chi of the initial investment and the transformer capacity is 80 yuan/KVA, and the power factor chi of the initial investment and the transformer capacity is 850 kW; the number of compensated years y is 10 years, and the electricity price Er0.7 yuan/kWh, run time Th8760 h; the power supply area where the transformer is located adopts an N-1 safety criterion, the contact relation is shown in figure 2, namely 3 transformer substations are adopted for interconnection, each transformer substation comprises 2 transformers, and the safe operation load coefficient lambda is obtained by table lookup and is 0.825; load data of the transformer for 1 year is collected and divided into 365 segments by taking 1 day as a unit time, as shown in fig. 3.
Further, the economic operation load is calculated as:
the safe operation load is as follows: ps＝0.825PN＝680.6kW；
Further, the economic efficiency coefficient and the safety efficiency coefficient corresponding to the optimal operation economic interval of the transformer are both set to be 0.5; the economic efficiency coefficient corresponding to other intervals is set to be 0.4, and the safe efficiency coefficient is set to be 0.6;
by passing
Completing 365-section operation efficiency evaluation to obtain the operation efficiency of the transformer in the operation time of 1 year
The invention also provides an evaluation system for the operation efficiency of the distribution network transformer, and the system described below can be correspondingly referred to with the method described above. Referring to fig. 4, fig. 4 is a schematic diagram of an evaluation system for operation efficiency of a distribution network transformer according to an embodiment of the present invention, and in conjunction with fig. 4, the system includes:
the acquiring module 10 is used for acquiring equipment parameters and safe operation load coefficients of the transformer;
the economic operation load calculation module 20 is used for calculating and obtaining the economic operation load of the transformer according to the equipment parameters;
the safe operation load calculation module 30 is used for calculating the safe operation load of the transformer according to the safe operation load coefficient;
and the operation efficiency calculation module 40 is used for calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load.
On the basis of the foregoing embodiment, optionally, the obtaining module 10 includes:
the transformer substation interconnection system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring a safety criterion of a power supply area where a transformer is located and a transformer substation interconnection relation; the transformer substation interconnection relationship comprises the number of interconnected transformer substations and the number of transformers in each transformer substation;
and the query unit is used for looking up a table to obtain the safe operation load coefficient according to the interconnection relationship between the safety criterion and the transformer substation.
Based on the above embodiment, the economic operation load calculation module 20 is optionally specifically used for calculating the economic operation load
Obtaining an economic operation load;
wherein, PeFor economic operation load, χ is the proportional coefficient of initial investment and transformer capacity, y is the number of years compensated, ThFor run time, ErTo the electricity price, P0For no-load losses, PkFor short-circuit losses, PNIs rated capacity.
Based on the above embodiment, optionally, the safe operation load calculation module 30 is specifically configured to pass Ps＝λPNCalculating to obtain a safe operation load; wherein λ is the safe operation load factor, PsTo run the load safely.
On the basis of the above embodiment, optionally, the operation efficiency calculation module 40 includes:
the acquisition unit is used for acquiring total load data of the transformer in a preset time period;
the dividing unit is used for dividing the preset time period into unit time periods with preset number, and correspondingly obtaining load data of the transformer in the unit time periods;
a first calculation unit for passing
Respectively obtaining the unit operation efficiency of the transformer in each unit time period;
a second calculation unit for passing
Calculating to obtain the operation efficiency of the transformer in a preset time period;
wherein, alpha is an economic efficiency coefficient, beta is a safety efficiency coefficient, and LiLoad data, η, for the transformer in a unit time periodiIs the unit operating efficiency, eta is the operating efficiency, and M is the preset number.
On the basis of the above embodiment, optionally, the method further includes:
and the adjusting module is used for adjusting the economic efficiency coefficient and/or the safety efficiency coefficient.
The invention further provides an evaluation device for the operation efficiency of the distribution network transformer, please refer to fig. 5, where fig. 5 is a schematic diagram of the evaluation device for the operation efficiency of the distribution network transformer provided in the embodiment of the invention; as can be seen from fig. 5, the evaluation means comprise a memory 11 and a processor 12. Wherein, the memory 11 is used for storing computer programs; a processor 12 for implementing the following steps when executing the computer program:
acquiring equipment parameters and a safe operation load coefficient of the transformer; calculating according to the equipment parameters to obtain the economic operation load of the transformer; calculating to obtain the safe operation load of the transformer according to the safe operation load coefficient; and calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load.
For the introduction of the evaluation apparatus provided by the present invention, please refer to the embodiment of the above evaluation method, which is not described herein again.
The present invention also provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of:
acquiring equipment parameters and a safe operation load coefficient of the transformer; calculating according to the equipment parameters to obtain the economic operation load of the transformer; calculating to obtain the safe operation load of the transformer according to the safe operation load coefficient; and calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load.
The computer-readable storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the embodiment disclosure system, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and for the relevant points, refer to the description of the method part.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The method, system, device and computer readable storage medium for evaluating the operation efficiency of the power distribution network transformer provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A method for evaluating the operation efficiency of a distribution network transformer is characterized by comprising the following steps:
acquiring equipment parameters and a safe operation load coefficient of the transformer;
calculating to obtain the economic operation load of the transformer according to the equipment parameters;
calculating to obtain the safe operation load of the transformer according to the safe operation load coefficient;
calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load;
the calculating the economic operation load of the transformer according to the equipment parameters comprises the following steps:
by passing
Obtaining the economic operation load;
wherein, the PeFor the economic operation load, x is a proportional coefficient of initial investment and transformer capacity, y is the number of years of compensation, and ThFor run time, said ErFor electricity price, the P0For no load loss, said PkFor short-circuit losses, said PNIs rated capacity;
the calculating the safe operation load of the transformer according to the safe operation load coefficient comprises the following steps:
by Ps＝λPNCalculating to obtain the safe operation load;
wherein λ is the safe operation load factor, PsOperating the load for the safety;
the calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load comprises the following steps:
collecting total load data of the transformer in a preset time period;
dividing the preset time period into unit time periods with preset number, and correspondingly obtaining load data of the transformers in the unit time periods;
by passing
Respectively obtaining the time of the transformer in each unitUnit operating efficiency of the time segment;
by passing
Calculating to obtain the operation efficiency of the transformer in the preset time period;
wherein, the alpha is an economic efficiency coefficient, the beta is a safety efficiency coefficient, and the L isiFor load data of said transformer in said unit time period, said ηiThe unit operation efficiency is defined as eta, and the M is the preset number.
2. The evaluation method of claim 1, wherein obtaining a safe operating load factor of the transformer comprises:
acquiring a safety criterion of a power supply area where the transformer is located and a transformer substation interconnection relation; the transformer substation interconnection relationship comprises the number of interconnected transformer substations and the number of transformers in each transformer substation;
and looking up a table to obtain the safe operation load coefficient according to the safety criterion and the transformer substation interconnection relation.
3. The evaluation method according to claim 1, further comprising:
adjusting the economic efficiency coefficient and/or the safety efficiency coefficient.
4. An evaluation system for the operating efficiency of a distribution network transformer, comprising:
the acquisition module is used for acquiring equipment parameters and safe operation load coefficients of the transformer;
the economic operation load calculation module is used for calculating the economic operation load of the transformer according to the equipment parameters;
the safe operation load calculation module is used for calculating to obtain the safe operation load of the transformer according to the safe operation load coefficient;
the operation efficiency calculation module is used for calculating the operation efficiency of the transformer according to the economic operation load and the safe operation load;
the economic operation load calculation module is specifically used for passing
Obtaining the economic operation load;
wherein, the PeFor the economic operation load, x is a proportional coefficient of initial investment and transformer capacity, y is the number of years of compensation, and ThFor run time, said ErFor electricity price, the P0For no load loss, said PkFor short-circuit losses, said PNIs rated capacity;
the safe operation load calculation module is specifically used for passing Ps＝λPNCalculating to obtain the safe operation load;
wherein λ is the safe operation load factor, PsOperating the load for the safety;
the operating efficiency calculation module includes:
the acquisition unit is used for acquiring total load data of the transformer within a preset time period;
the dividing unit is used for dividing the preset time period into unit time periods with preset number, and correspondingly obtaining load data of the transformer in the unit time periods;
a first calculation unit for passing
a second calculation unit for passing
Calculating the operation of the transformer in the preset time periodEfficiency;
wherein, the alpha is an economic efficiency coefficient, the beta is a safety efficiency coefficient, and the L isiFor load data of said transformer in said unit time period, said ηiThe unit operation efficiency is defined as eta, and the M is the preset number.
5. The evaluation system of claim 4, further comprising:
and the adjusting module is used for adjusting the economic efficiency coefficient and/or the safety efficiency coefficient.
6. An assessment device for the operating efficiency of a distribution network transformer, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method for assessing the operational efficiency of a transformer of a power distribution network according to any one of claims 1 to 3 when executing said computer program.
7. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for assessing the operating efficiency of a distribution network transformer according to any one of claims 1 to 3.
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| CN102901890A (en) * | 2012-11-28 | 2013-01-30 | 安徽省电力公司 | Transformer economic operation online judging method |
| CN102969787A (en) * | 2012-09-26 | 2013-03-13 | 江西省电力科学研究院 | Distribution transformer economical operation control method |
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