CN110244115A - One kind being based on the internuncial load switch event detecting method of signal and system - Google Patents
One kind being based on the internuncial load switch event detecting method of signal and system Download PDFInfo
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Abstract
It includes: S1 that the present invention, which discloses one kind based on the internuncial load switch event detecting method of signal and system, method: obtaining power signal detection sequence P1,P2,…,PN‑1,…,PN；Wherein, P indicates that power, N indicate time serial number；S2: time window length is determined；S3: iteration control parameter n, n=1,2 ..., N are determined；S4: corresponding power parameter under all time window length is calculated based on the iteration control parameter；S5: enabling n=n+1, repeats step S3, until n is greater than N, obtains power parameter sequence；S6: determine that the moment occurs for switch events based on the power parameter and the power parameter sequence.The above method in the present invention can be improved the detection accuracy of switch events.
Description
Technical Field
The invention relates to the field of electrical equipment, in particular to a load switch event detection method and system based on signal connectivity.
Background
With the development of smart grids, the analysis of household electrical loads becomes more and more important. Through the analysis of the power load, a family user can obtain the power consumption information of each electric appliance and a refined list of the power charge in time; the power department can obtain more detailed user power utilization information, can improve the accuracy of power utilization load prediction, and provides a basis for overall planning for the power department. Meanwhile, the power utilization behavior of the user can be obtained by utilizing the power utilization information of each electric appliance, so that the method has guiding significance for the study of household energy consumption evaluation and energy-saving strategies.
The current electric load decomposition is mainly divided into an invasive load decomposition method and a non-invasive load decomposition method. The non-invasive load decomposition method does not need to install monitoring equipment on internal electric equipment of the load, and can obtain the load information of each electric equipment only according to the total information of the electric load. The non-invasive load decomposition method has the characteristics of less investment, convenience in use and the like, so that the method is suitable for decomposing household load electricity.
In the non-invasive load decomposition algorithm, the detection of the switching event of the electrical equipment is the most important link. The initial event detection takes the change value of the active power P as the judgment basis of the event detection, and is convenient and intuitive. This is because the power consumed by any one of the electric devices changes, and the change is reflected in the total power consumed by all the electric devices. Besides the need to set a reasonable threshold for the power variation value, this method also needs to solve the problem of the event detection method in practical application: a large peak (for example, a motor starting current is much larger than a rated current) appears in an instantaneous power value at the starting time of some electric appliances, so that an electric appliance steady-state power change value is inaccurate, and the judgment of a switching event is influenced, and the peak is actually pulse noise; moreover, the transient process of different household appliances is long or short (the duration and the occurrence frequency of impulse noise are different greatly), so that the determination of the power change value becomes difficult; due to the fact that the active power changes suddenly when the quality of the electric energy changes (such as voltage drop), misjudgment is likely to happen.
Disclosure of Invention
The invention aims to provide a load switch event detection method based on signal connectivity, which improves the detection precision of a switch event.
In order to achieve the purpose, the invention provides the following scheme:
a method of load switch event detection based on signal connectivity, the method of detection comprising:
s1: obtaining a power signal detection sequence P1,P2,…,PN-1,…,PN(ii) a Wherein, P represents power, N represents time sequence number;
s2: determining a time window length;
s3: determining an iteration control parameter N, N is 1,2, …, N;
s4: calculating corresponding power parameters under all the time window lengths based on the iteration control parameters;
s5: repeating the step S3 until N is greater than N, and obtaining a power parameter sequence;
s6: determining a switching event occurrence time based on the power parameter and the sequence of power parameters.
Optionally, the time window specifically includes: first time window T1A second time window T2And a third time window T3。
Optionally, the first time window T110, the second time window T220, the third time window T3＝30。
Optionally, the following formula is specifically adopted for calculating the corresponding power parameters under all the time window lengths based on the iterative control parameters:
wherein, representing T in the T time window before the nth point datatThe sum of the individual power data is,indicating T in the T time window after the nth datatSum of power data, PmPower data representing the m-th time, TtDenotes the tth time window, t 1,2,3,when three conditions of t being 1,2 and 3 are selected,is measured.
Optionally, the power parameter sequence includes:
optionally, the determining the occurrence time of the switching event based on the power parameter and the power parameter sequence specifically includes:
judgment ofWhether or not greater thanIs equal to
If it isIs greater than or equal toCorresponding to a switching event, the side occurrence time of the switching event is
The present invention additionally provides a load switch event detection system based on signal connectivity, the detection system comprising:
an obtaining module, configured to obtain a power signal detection sequence P1,P2,…,PN-1,…,PN(ii) a Wherein, P represents power, N represents time sequence number;
the time window determining module is used for determining the length of the time window;
an iteration control parameter determining module, configured to determine an iteration control parameter N, N being 1,2, …, N;
the calculation module is used for calculating corresponding power parameters under all the time window lengths based on the iteration control parameters;
the power parameter determining module is used for enabling N to be N +1, and repeatedly executing the iteration control parameter determining module until N is larger than N to obtain a power parameter sequence;
and the switching event occurrence time determining module is used for determining the switching event occurrence time based on the power parameter and the power parameter sequence.
Optionally, the time window specifically includes: first time window T1The second timeWindow T2And a third time window T3。
Optionally, the first time window T110, the second time window T220, the third time window T3＝30。
Optionally, the following formula is specifically adopted for calculating the corresponding power parameters under all the time window lengths based on the iterative control parameters:
wherein, representing T in the T time window before the nth point datatThe sum of the individual power data is,indicating T in the T time window after the nth datatSum of power data, PmPower data representing the m-th time, TtDenotes the tth time window, t 1,2,3,when three conditions of t being 1,2 and 3 are selected,is measured.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the method of the invention utilizes signal connectivity to detect the load switch event, determines the moment of the switch event according to the power parameter and the power parameter sequence, and can detect the real power change, namely the power change caused by the load switch event, but not the power change caused by pulse noise, thereby correctly detecting the load switch event and improving the event detection precision. The method has the advantages of good robustness and simple calculation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used 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 inventive exercise.
FIG. 1 is a flow chart of a method for load switch event detection based on signal connectivity according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a load switch event detection system based on signal connectivity 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, 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 invention aims to provide a load switch event detection method based on signal connectivity, which improves the detection precision of a switch event.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a flowchart of a load switch event detection method based on signal connectivity according to an embodiment of the present invention, where as shown in fig. 1, the detection method includes:
s1: obtaining a power signal detection sequence P1,P2,…,PN-1,…,PN(ii) a Where P denotes power and N denotes time series.
S2: the time window length is determined.
Wherein, three time windows are totally provided, the first time window T1A second time window T2And a third time window T3Said first time window T110, the second time window T220, the third time window T3＝30。
S3: and determining iteration control parameters N, N is 1,2, … and N.
S4: and calculating corresponding power parameters under all the time window lengths based on the iteration control parameters.
That is, the following parameters are calculated for the three time windows:
representing T in the T time window before the nth point datatThe sum of the individual power data is,indicating T in the T time window after the nth datatSum of power data, PmPower data representing the m-th time, TtDenotes the tth time window, t 1,2,3,when three conditions of t being 1,2 and 3 are selected,is measured.
For example: when n is 10, t is 1,indicates T before the 10 th point1The sum of 10 power values;
when n is 10 and t is 2,indicates T before the 10 th point2The sum of 20 power values;indicating T in the T time window after the nth datatThe sum of the individual power data.
For another example, when n is 15, t is 1,after the 15 th point, T1The sum of 10 power values;
when n is 15, t is 3,represents T after point 153The sum of 30 power values;
then it is indicated at T1，T2，T3In the time window of three lengths,wherein t is0(n) represents t corresponding to the maximum value, namely:
s5: let N be N +1, repeat step S3 until N is greater than N, resulting in a power parameter sequence.
The power parameter sequence is:
s6: determining a switching event occurrence time based on the power parameter and the sequence of power parameters.
Namely, judgment ofWhether or not it is greater than or equal to
If it isIs greater than or equal toCorresponding to a switching event, the side occurrence time of the switching event is
Fig. 2 is a schematic structural diagram of a load switch event detection system based on signal connectivity according to an embodiment of the present invention, and as shown in fig. 2, the detection system includes:
an obtaining module 201, configured to obtain a power signal detection sequence P1,P2,…,PN-1,…,PN(ii) a Wherein, P represents power, N represents time sequence number;
a time window determining module 202, configured to determine a time window length;
an iteration control parameter determining module 203, configured to determine an iteration control parameter N, N is 1,2, …, N;
a calculating module 204, configured to calculate, based on the iteration control parameter, corresponding power parameters for all the time window lengths;
a power parameter determining module 205, configured to make N equal to N +1, and repeatedly execute the iterative control parameter determining module until N is greater than N, so as to obtain a power parameter sequence;
a switching event occurrence time determination module 206, configured to determine a switching event occurrence time based on the power parameter and the sequence of power parameters.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A method for load switch event detection based on signal connectivity, the method comprising:
s1: obtaining a power signal detection sequence P1,P2,…,PN-1,…,PN(ii) a Wherein, P represents power, N represents time sequence number;
s2: determining a time window length;
s3: determining an iteration control parameter N, N is 1,2, …, N;
s4: calculating corresponding power parameters under all the time window lengths based on the iteration control parameters;
s5: repeating the step S3 until N is greater than N, and obtaining a power parameter sequence;
s6: determining a switching event occurrence time based on the power parameter and the sequence of power parameters.
2. The method according to claim 1, wherein the time window specifically comprises: first time window T1A second time window T2And a third time window T3。
3. The method of claim 2, wherein the first time window T is greater than the second time window T110, the second time window T220, the third time window T3＝30。
4. The method according to claim 2, wherein the calculating of the corresponding power parameter for all the time window lengths based on the iterative control parameter specifically uses the following formula:
wherein, representing T in the T time window before the nth point datatThe sum of the individual power data is,indicating T in the T time window after the nth datatSum of power data, PmPower data representing the m-th time, TtDenotes the tth time window, t 1,2,3,when three conditions of t being 1,2 and 3 are selected,is measured.
5. The signal connectivity-based load switch event detection method of claim 1, wherein the sequence of power parameters comprises:
6. the method according to claim 1, wherein the determining the occurrence time of the switching event based on the power parameter and the sequence of power parameters specifically comprises:
judgment ofWhether or not it is greater than or equal to
If it isIs greater than or equal toCorresponding to a switching event, the side of the switching eventThe occurrence time is
7. A load switch event detection system based on signal connectivity, the detection system comprising:
an obtaining module, configured to obtain a power signal detection sequence P1,P2,…,PN-1,…,PN(ii) a Wherein, P represents power, N represents time sequence number;
the time window determining module is used for determining the length of the time window;
an iteration control parameter determining module, configured to determine an iteration control parameter N, N being 1,2, …, N;
the calculation module is used for calculating corresponding power parameters under all the time window lengths based on the iteration control parameters;
the power parameter determining module is used for enabling N to be N +1, and repeatedly executing the iteration control parameter determining module until N is larger than N to obtain a power parameter sequence;
and the switching event occurrence time determining module is used for determining the switching event occurrence time based on the power parameter and the power parameter sequence.
8. The signal connectivity-based load switch event detection system of claim 7, wherein the time window specifically comprises: first time window T1A second time window T2And a third time window T3。
9. The signal connectivity-based load switch event detection system of claim 8, wherein the first time window T110, the second time window T220, the third time window T3＝30。
10. The method according to claim 7, wherein the calculating of the corresponding power parameter for all the time window lengths based on the iterative control parameter specifically uses the following formula:
wherein, representing T in the T time window before the nth point datatThe sum of the individual power data is,indicating T in the T time window after the nth datatSum of power data, PmPower data representing the m-th time, TtDenotes the tth time window, t 1,2,3,when three conditions of t being 1,2 and 3 are selected,is measured.
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| CN111161097A (en) * | 2019-12-31 | 2020-05-15 | 四川大学 | Method and device for detecting switch event based on event detection algorithm of hypothesis test |
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