CN107392442B - Low-voltage substation user energy consumption evaluation method - Google Patents

Low-voltage substation user energy consumption evaluation method Download PDF

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CN107392442B
CN107392442B CN201710532030.0A CN201710532030A CN107392442B CN 107392442 B CN107392442 B CN 107392442B CN 201710532030 A CN201710532030 A CN 201710532030A CN 107392442 B CN107392442 B CN 107392442B
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energy consumption
historical demand
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赵新红
范希文
明廷玉
常凯
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SHANGHAI SUNRISE POWER TECHNOLOGY CO LTD
Shanghai Anyo Energy Saving Technology Co ltd
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Abstract

A low-voltage substation user energy consumption assessment method relates to the technical field of energy management and solves the technical problem of reducing the electricity consumption cost of a user side. The method comprises the steps of firstly, acquiring power consumption data of a power substation in the previous month; and then according to the previous month electricity utilization data, calculating 24 daily average time-sharing electricity consumption and 24 daily average time-sharing loss of the previous month of the substation, counting previous month demand data of the electric energy meter of the substation, and further calculating an energy consumption evaluation value of the substation. The method provided by the invention can reduce the electricity consumption cost of the user side.

Description

Low-voltage substation user energy consumption evaluation method
Technical Field
The invention relates to an energy management technology, in particular to a technology of a low-voltage substation user energy consumption evaluation method.
Background
Most low-voltage substations are power supply terminals of users and are responsible for energy demand management. The power consumption cost of users is related to various energy losses, load structures and electric energy when the peak valley is divided equally. The energy consumption information of the substation is decomposed, various controllable energy consumption factors are analyzed, the energy consumption of a user is reasonably evaluated, the user can be helped to know the load composition, the energy waste is reduced, and the power consumption cost is reduced, but no effective user energy consumption evaluation method exists at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a low-voltage substation user energy consumption evaluation method capable of reducing the power consumption cost of a user side.
In order to solve the technical problem, the invention provides a method for evaluating user energy consumption of a low-voltage substation, which is characterized by comprising the following specific steps of:
1) acquiring power consumption data of a substation in the previous month;
2) calculating the average time-sharing electricity consumption of 24 days in the last month of the substation, wherein the specific calculation formula is as follows:
Figure BDA0001339509940000011
wherein S isiThe average time-sharing electricity consumption of the ith day of the last month of the substation, T is the calendar days of the last month, n is the number of inlet wires of the substation, Wk,j,iThe time-sharing electricity consumption of the jth inlet wire of the substation in the ith hour of the kth day of the previous month is obtained;
3) 288 × T historical demand values are obtained from the monthly demand data of the electric energy meter of the substation in a manner of taking one demand value every 5 minutes, the historical demand values form a historical demand value sequence A according to a value sequence, and the largest historical demand value MD is selected from the historical demand value sequence A;
counting the number of the historical demand values meeting the condition 1 in the historical demand value sequence A, and recording the counting result as MDr;
condition 1: the historical demand values of more than 95% MD, which are one of the historical demand values of more than 95% MD, appear at least 3 times in succession in the historical demand value sequence A;
4) calculating the average time-sharing loss of 24 days in the last month of the substation, wherein the specific calculation formula is as follows:
Figure BDA0001339509940000021
wherein L isiThe average time-sharing loss amount, Wc, of the ith day of the last month of the substationk,j,iThe time-sharing electricity consumption of the jth outgoing line of the substation in the ith hour of the kth day of the last month is shown, and m is the outgoing line number of the substation;
5) calculating the energy consumption evaluation value F of the substation, wherein the specific calculation formula is as follows:
Figure BDA0001339509940000022
wherein mi is the sum of four minimum daily average time-sharing electricity consumptions of the last month of the substation, ma is the sum of four maximum daily average time-sharing electricity consumptions of the last month of the substation, λ is a standby coefficient, β is a load transfer weight and is an abnormal electricity consumption coefficient, and λ and β are all preset constants.
Further, λ is 0.25, β is 5.0, and β is 0.5.
Further, an energy consumption alarm threshold value is preset, if the energy consumption evaluation value F of the substation is larger than the preset energy consumption alarm threshold value, it is judged that the energy consumption of the substation is abnormal, an energy consumption alarm signal is sent out, and the value of the energy consumption alarm threshold value is 0.1.
According to the low-voltage substation user energy consumption assessment method, the energy consumption assessment value of the substation is calculated according to historical data of incoming and outgoing lines of the substation and the demand data value of the electric energy meter, and then energy consumption alarm information is timely sent according to the energy consumption assessment value, so that a user can be helped to know load composition, energy waste is reduced, and the electricity consumption cost of the user side is reduced.
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Fig. 1 is a flowchart of a method for evaluating energy consumption of a user of a low-voltage substation according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the following description of the drawings, but the embodiments are not intended to limit the present invention, and all similar structures and similar variations using the present invention shall be included in the scope of the present invention, and the pause numbers in the present invention shall have a relation of the same.
As shown in fig. 1, the method for evaluating energy consumption of a user in a low-voltage substation provided by the embodiment of the present invention is characterized by comprising the following specific steps:
1) acquiring power consumption data of a substation in the previous month;
2) calculating the average time-sharing electricity consumption of 24 days in the last month of the substation, wherein the specific calculation formula is as follows:
Figure BDA0001339509940000031
wherein S isiThe average time-sharing electricity consumption of the ith day of the last month of the substation is more than or equal to 0 and less than or equal to 23, T is the calendar days of the last month, n is the number of incoming lines of the substation, Wk,j,iThe time-sharing electricity consumption of the jth inlet wire of the substation in the ith hour of the kth day of the previous month is obtained;
the 0 th hour of each day is 0 hour to 0 hour 59 minutes 59 seconds of the day, the 1 st hour of each day is 1 hour to 1 hour 59 minutes 59 seconds of the day, the 2 nd hour of each day is 2 hours to 2 hours 59 minutes 59 seconds of the day, and so on;
3) 288 × T historical demand values are obtained from the monthly demand data of the electric energy meter of the substation in a manner of taking one demand value every 5 minutes, the historical demand values form a historical demand value sequence A according to a value sequence, and the largest historical demand value MD is selected from the historical demand value sequence A;
counting the number of the historical demand values meeting the condition 1 in the historical demand value sequence A, and recording the counting result as MDr;
condition 1: the historical demand values of more than 95% MD, which are one of the historical demand values of more than 95% MD, appear at least 3 times in succession in the historical demand value sequence A;
4) calculating the average time-sharing loss of 24 days in the last month of the substation, wherein the specific calculation formula is as follows:
Figure BDA0001339509940000041
wherein L isiThe average time-sharing loss amount of the ith day of the last month of the substation (the meaning of i in the step is consistent with that of i in the step 2), Wck,j,iThe time-sharing electricity consumption of the jth outlet of the substation in the ith hour of the kth day of the last month, and m is the outlet of the substationThe number of lines;
5) calculating the energy consumption evaluation value F of the substation, wherein the specific calculation formula is as follows:
Figure BDA0001339509940000042
wherein mi is the sum of four minimum daily average time-sharing electricity consumptions (i.e. four minimum S) of the last month of the substationiMa is the sum of four maximum daily average time-sharing electricity consumptions (namely four maximum S) of the last month of the substationiSum), λ is standby coefficient, β is load transfer weight, which is abnormal electricity utilization coefficient, the typical value of λ is 0.25, the typical value of β is 5.0, and the typical value is 0.5;
an energy consumption alarm threshold value is preset, if the energy consumption evaluation value F of the substation is larger than the preset energy consumption alarm threshold value, the abnormal energy consumption of the substation is judged, an energy consumption alarm signal is sent out, the typical value of the energy consumption alarm threshold value is 0.1, and the larger the energy consumption evaluation value F of the substation is, the more serious the abnormal energy consumption condition of the substation is.

Claims (2)

1. A low-voltage substation user energy consumption evaluation method is characterized by comprising the following specific steps:
1) acquiring power consumption data of a substation in the previous month;
2) calculating the average time-sharing electricity consumption of 24 days in the last month of the substation, wherein the specific calculation formula is as follows:
Figure FDA0002406766520000011
wherein S isiThe average time-sharing electricity consumption of the ith day of the last month of the substation, T is the calendar days of the last month, n is the number of inlet wires of the substation, Wk,j,iThe time-sharing electricity consumption of the jth inlet wire of the substation in the ith hour of the kth day of the previous month is obtained;
3) 288 × T historical demand values are obtained from the monthly demand data of the electric energy meter of the substation in a manner of taking one demand value every 5 minutes, the historical demand values form a historical demand value sequence A according to a value sequence, and the largest historical demand value MD is selected from the historical demand value sequence A;
counting the number of the historical demand values meeting the condition 1 in the historical demand value sequence A, and recording the counting result as MDr;
condition 1: the historical demand values of more than 95% MD, which are one of the historical demand values of more than 95% MD, appear at least 3 times in succession in the historical demand value sequence A;
4) calculating the average time-sharing loss of 24 days in the last month of the substation, wherein the specific calculation formula is as follows:
Figure FDA0002406766520000012
wherein L isiThe average time-sharing loss amount, Wc, of the ith day of the last month of the substationk,j,iThe time-sharing electricity consumption of the jth outgoing line of the substation in the ith hour of the kth day of the last month is shown, and m is the outgoing line number of the substation;
5) calculating the energy consumption evaluation value F of the substation, wherein the specific calculation formula is as follows:
Figure FDA0002406766520000013
wherein mi is the sum of four minimum daily average time-sharing electricity consumptions of a previous month of the substation, ma is the sum of four maximum daily average time-sharing electricity consumptions of a previous month of the substation, lambda is a standby coefficient, beta is a load transfer weight and is an abnormal electricity consumption coefficient, and lambda and beta are preset constants;
presetting an energy consumption alarm threshold, if the energy consumption evaluation value F of the substation is greater than the preset energy consumption alarm threshold, judging that the energy consumption of the substation is abnormal, and sending an energy consumption alarm signal, wherein the value of the energy consumption alarm threshold is 0.1.
2. The low-voltage substation user energy consumption evaluation method according to claim 1, characterized in that: lambda is 0.25, beta is 5.0, and beta is 0.5.
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CN109471854B (en) * 2018-10-31 2020-09-15 广东兴发铝业有限公司 Verification method for data acquired by big data energy consumption online monitoring system
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CN111967649B (en) * 2020-07-21 2024-01-05 浙江中新电力工程建设有限公司 Intelligent electricity utilization excitation demand response system and quick response method thereof
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