CN109190242A - Impedance estimation method for line of service segment - Google Patents
Impedance estimation method for line of service segment Download PDFInfo
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- CN109190242A CN109190242A CN201811007697.XA CN201811007697A CN109190242A CN 109190242 A CN109190242 A CN 109190242A CN 201811007697 A CN201811007697 A CN 201811007697A CN 109190242 A CN109190242 A CN 109190242A
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Abstract
The invention discloses a home segment line impedance estimation method, which comprises the following steps: step S1, collecting three-phase voltage at branch points at the general opening of a building meter box through a non-home-entry measuring terminal, and collecting user current at each user home-entry switch; step S2, performing electrothermal load identification through acquiring and comparing active power lifting, active power dropping, reactive power change and load operation time interval rules; step S3, constructing a circuit model according to a low-voltage distribution network topological structure from a building meter box to a user, and establishing an impedance calculation mathematical model aiming at the circuit model; and step S4, substituting the electric heating load identification result into the mathematical model, and solving an equation based on a binary linear regression method to obtain the line impedance of the service section. The invention can monitor the health degree of the line impedance of the user service section by calculating the line impedance of the service section.
Description
Technical field
It registers one's residence a section line impedance estimation method the present invention relates to power management techniques field more particularly to one kind.
Background technique
With the increase of power circuit service life and the erosion of external extreme natural environment, route can gradually aging,
On the one hand there is the possibility of broken string in aging circuit, be more after electric wire aging, decreasing insulating is easy to produce electric leakage or short circuit
Phenomenon.Calculating for line impedance is confined to mesohigh power distribution network before due to the missing of metric data, faces branch
The low-voltage network of bulky complex is always the blank of monitoring, and the investigation for route is mostly that ground connection, broken string or short circuit has occurred
Etc. carry out live investigation again after failures.
The all standing of power information acquisition system, which is built, provides the number of analysis for the calculating of low-voltage network line impedance
According to source, how electric power researcher is also begun to focus on using the data progress low-voltage network line impedance analysis acquired, but deposits
A blind area be the cells such as present high-rise building electricity box mostly be to install concentratedly, electricity box to user be spaced apart place there is also one
Section is registered one's residence a section route, and positional distance of the route because of different user away from electricity box is different, and the influence to user also has relatively big difference.By
It can not be calculated in lacking detailed electricity consumption data, conventional method inside user.
Summary of the invention
Technical problem to be solved by the present invention lies in provide one kind and register one's residence a section line impedance estimation method, to monitor use
Family is registered one's residence the health degree of section line impedance.
It registers one's residence a section line impedance estimation method in order to solve the above technical problem, the present invention provides one kind, comprising:
Step S1 measures terminal three-phase voltage at the building electricity box always place's of opening acquisition branch point by non-register one's residence, in each use
Family, which is registered one's residence, acquires user's electric current at switch；
Step S2, by active power lifting, active power is fallen, reactive power change and the load operation period is regular
It obtains and compares, carry out electrothermal load identification；
Step S3 constructs circuit model according to the low-voltage network network topology structure of building electricity box to user, and is directed to
The circuit model establishes impedance computation mathematical model；
Electrothermal load identification result is substituted into the mathematical model, is based on binary linear regression method progress side by step S4
Journey solves, and obtains a section line impedance of registering one's residence.
Wherein, the step S1 is specifically included:
Three-phase voltage instantaneous value is acquired by the non-voltage transformer measured in terminal of registering one's residence, and does basic data virtual value
Analysis, form the sequence chart that is distributed at any time of voltage effective value at electricity box；
The grid-connected critical point current instantaneous value of user is acquired by the non-current transformer measured in terminal of registering one's residence, and does virtual value
Analysis, FFP frequency analysis forms the sequence chart that total current virtual value is distributed at any time of registering one's residence.
Wherein, the step S2 is specifically included:
Step S21, the grid-connected critical point current instantaneous value of three-phase voltage instantaneous value and user based on acquisition carry out integrating meter
It calculates, obtains active power sequence P (t), reactive power sequence Q (t)；
Step S22 is changed with the active power variation delta P (t) of two period of setting time interval calculation, reactive power
It measures Δ Q (t)；
Step S23, judges whether active power variation delta P (t) is greater than the rated value P of settingVolume, if so, record should
The lifting moment is ton, record active power lifting value is Δ Pu, reactive power lifting value is Δ Qu, and the series data is charged to
Load identification is according to list；
Step S24, judges whether active power variation delta P (t) is less than the rated value P of settingVolume, if so, record should
Fall constantly as toff, it is Δ P that record active power, which falls value,d, it is Δ Q that reactive power, which falls value,d, and the series data is charged to
Load identification is according to list；
Step S25, works as satisfaction | Δ Pu|≈|ΔPd|>PVolume；|ΔQu|≈|ΔQd| when ≈ 0, judge that the load is negative for electric heating
Lotus, and record the operation data of the electrothermal load.
Wherein, the rated value P of the settingVolumeIt is set as 2500W.
Wherein, the operation data of the electrothermal load of record includes: electrothermal load working hour (ton, toff)；Electrothermal load work
Make the Power x Time P of periodR(t), the current time sequence I of electrothermal load working hourR(t)；The table of electrothermal load working hour
End voltage time sequence U (t) at case.
Wherein, in the step S3, linear C-V characteristic relationship and the Kiel of the purely resistive of electrothermal load are specifically utilized
Hough voltage law establishes impedance computation mathematical model for the circuit model.
Wherein, in the circuit model, since at electricity box node, it is negative that a section line impedance of registering one's residence is approximately equal to purely resistive
It carries, the place of being spaced apart of registering one's residence is the total node of family, is parallel to indoor electrical equipment and is spaced apart node, each equipment is equivalent to corresponding pure resistance
Property load, induction motors load, capacitive load, electrothermal load is equivalent to purely resistive load.
Wherein, the impedance computation mathematical model that the step S3 is established is as follows:
UC=IC1ZC1+IRR
In above formula, UCFor end voltage, Z at electricity boxC1For a section line impedance of registering one's residence, IC1For a section line current of registering one's residence, R is user
The impedance of interior electrothermal load, IRFor with indoor electrothermal load electric current.
Wherein, the step S4 is specifically included:
Step S41 transfers the operation data of multiple groups electrothermal load from historical data base, is denoted as m group (ton, toff)；
Step S42 obtains selected each run the period (t of m groupon, toff) during electricity box at end voltage time sequence U
(t), user total current time series I (t), with indoor electrothermal load current time sequence IR(t)；
Step S43, by end voltage time sequence U (t) at electricity box, user total current time series I (t), with indoor electric heating
Load current time series IR(t) above-mentioned mathematical model is substituted into respectively, forms time series equation group；
Step S44 selects binary linear regression method by MATLAB calculating instrument, carries out to time series equation group
It solves, obtains the impedance value R of electrothermal load and section line impedance Z that registers one's residenceC1。
Wherein, in the step S41, the foundation for transferring operation data is each electrothermal load run the period, end at electricity box
Voltage is all different.
The beneficial effect of the embodiment of the present invention is: being registered one's residence section by that can monitor user to section line impedance calculating of registering one's residence
The health degree of line impedance, if certain user's impedance significantly increases as time goes by, the user there may be aging circuit,
It is compared by threshold value, determines that certain user is dangerous with the presence or absence of broken string, can then take interruption maintenance in this way.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is an a kind of section flow diagram for line impedance estimation method of registering one's residence of the embodiment of the present invention.
Fig. 2 is distribution network impedance analysis principle schematic diagram in the embodiment of the present invention.
Fig. 3 is the sequence chart that the voltage effective value of user port in the embodiment of the present invention is distributed at any time.
Fig. 4 is the sequence chart that the current effective value of user port in the embodiment of the present invention is distributed at any time.
Fig. 5 is the current time sequence chart that the electrothermal load come is picked out in the embodiment of the present invention.
Fig. 6 is the circuit model schematic constructed in the embodiment of the present invention.
Specific embodiment
The explanation of following embodiment be with reference to attached drawing, can be to the specific embodiment implemented to the example present invention.
It please refers to shown in Fig. 1, the embodiment of the present invention provides one kind and registers one's residence a section line impedance estimation method, comprising:
Step S1 measures terminal three-phase voltage at the building electricity box always place's of opening acquisition branch point by non-register one's residence, in each use
Family, which is registered one's residence, acquires user's electric current at switch；
Step S2, by active power lifting, active power is fallen, reactive power change and the load operation period is regular
It obtains and compares, carry out electrothermal load identification；
Step S3 constructs circuit model according to the low-voltage network network topology structure of building electricity box to user, and is directed to
The circuit model establishes impedance computation mathematical model；
Electrothermal load identification result is substituted into the mathematical model, is based on binary linear regression method progress side by step S4
Journey solves, and obtains a section line impedance of registering one's residence.
Specifically, the distribution line please also refer to distribution network impedance analysis principle schematic diagram shown in Fig. 2, more than electricity box
Impedance ZDA, ZABDistribution network model calculating is combined to acquire etc. voltage and current power data that can use at electricity box etc.；Electricity box are below
Register one's residence a section line impedance ZC1, ZC2, ZC3Deng due to lacking indoor detailed electricity consumption data, existing conventional method can not be calculated, this hair
It is bright, measure terminal based on non-register one's residence and carry out electrothermal load identification, and modeled according to electrothermal load characteristic, and then acquire into
Family section line impedance.
Non- register one's residence measures terminal and is installed in building electricity box, by the way that in electricity box, always the place of opening acquires three-phase voltage at branch point,
Register one's residence electric current in each user acquisition at switch of registering one's residence, can discriminating user refine load electricity consumption behavior.Specifically, non-measurement of registering one's residence
Terminal acquires three-phase voltage instantaneous value u by the voltage transformer in it, and does the analysis of basic data virtual value U, is formed such as
The sequence chart that voltage effective value shown in Fig. 3 at electricity box is distributed at any time.Non- register one's residence measures terminal and passes through the electric current in it
Mutual inductor acquires the grid-connected critical point current instantaneous value i of user, and does the analysis of virtual value I, FFP frequency analysis etc., is formed such as Fig. 4 institute
The sequence chart that the total current virtual value of registering one's residence shown is distributed at any time.
The electrothermal load of step S2 recognize specifically includes the following steps:
Step S21, the grid-connected critical point current instantaneous value i of three-phase voltage instantaneous value u and user based on acquisition carry out integrating meter
It calculates, obtains active power sequence P (t), reactive power sequence Q (t)；
Step S22, with setting time interval (such as 0.1 second) calculate two periods active power variation delta P (t),
Reactive power variation delta Q (t)；
Step S23, judges whether active power variation delta P (t) is greater than the rated value P of settingVolume, if so, record should
The lifting moment is ton, record active power lifting value is Δ Pu, reactive power lifting value is Δ Qu, and the series data is charged to
Load identification is according to list；Wherein, the rated value P of the settingVolumeNumerical value according to the household electrical appliance list of user summarize determine, often
Rule have 1000W, 1200W, 1500W, 2000W, 2500W and 3000W etc., and the performance number of electrothermal load is set as in the present embodiment
2500W；
Step S24, judges whether active power variation delta P (t) is less than the rated value P of settingVolume, if so, record should
Fall constantly as toff, it is Δ P that record active power, which falls value,d, it is Δ Q that reactive power, which falls value,d, and the series data is charged to
Load identification is according to list；The rated value P of settingVolumeWith the rated value P of the setting in step S23VolumeIt is identical；
Step S25, works as satisfaction | Δ Pu|≈|ΔPd|>PVolume；|ΔQu|≈|ΔQd| when ≈ 0, then judge the load for electric heating
Load, and record the operation data of the electrothermal load, comprising:
Electrothermal load working hour: (ton, toff)；
The power P of electrothermal load working hourR(t), electric current iR(t)；
Voltage U (t) at the electricity box of electrothermal load working hour.
As shown in Figure 5 is the current sequence figure for picking out the electrothermal load come.
In step S3, circuit model is constructed to indoor low-voltage network network topology structure according to electricity box, utilizes electricity
The linear C-V characteristic relationship and Kirchhoff's second law (KVL) of the purely resistive of thermic load establish resistance for the circuit model
Anti- calculating mathematical model.
In the present embodiment, for the circuit model of building as shown in fig. 6, since at electricity box node, section line impedance of registering one's residence is close
Approximately equal to purely resistive load, the place of being spaced apart of registering one's residence is the total node of family, is parallel to indoor electrical equipment and is spaced apart node, each equipment etc.
Effect is corresponding purely resistive load, induction motors load, capacitive load etc., and the electrothermal load in the present embodiment is equivalent to purely resistive
Load.
For the circuit model, the impedance computation mathematical model of foundation is as follows:
UC=IC1ZC1+IRR
In above formula, UCFor end voltage, Z at electricity boxC1For a section line impedance of registering one's residence, IC1For a section line current of registering one's residence, R is user
The impedance of interior electrothermal load, IRFor with indoor electrothermal load electric current.
In step S4, electrothermal load identification result is substituted into above-mentioned mathematical model, is carried out based on binary linear regression method
Equation solution, to obtain a section line impedance of registering one's residence, the specific steps are as follows:
Step S41 transfers the operation data of multiple groups electrothermal load from historical data base, is denoted as m group (ton, toff)；It adjusts
The foundation for taking operation data is each electrothermal load run the period, and end voltage U is all different at electricity box；
Step S42 obtains selected each run the period (t of m groupon, toff) during electricity box at end voltage time sequence U
(t), user total current time series I (t), with indoor electrothermal load current time sequence IR(t)；
Step S43, by end voltage time sequence U (t) at electricity box, user total current time series I (t), with indoor electric heating
Load current time series IR(t) above-mentioned mathematical model is substituted into respectively, forms time series equation group；
Step S44 selects binary linear regression method by MATLAB calculating instrument, carries out to time series equation group
It solves, obtains the impedance value R of electrothermal load and section line impedance Z that registers one's residenceC1.As an example, according to Fig. 3-number shown in fig. 5
Impedance value according to the electrothermal load being calculated is 20.197 Europe, and section line impedance of registering one's residence is 0.006 Europe.
In the error analysis report that linear regression analysis calculates, the standard error of the impedance computation of electrothermal load is
0.012, the standard error 0.007 that section line impedance of registering one's residence calculates, standard error here is the finger that linear regression calculates
Mark, standard error is smaller, and representative fitting is more accurate, also means that regression coefficient is more accurate, it follows that above-mentioned equation model
As a result ideal.Electrothermal load computing impedance value and nominal impedance value are compared, which is 19.36 Europe, accidentally
Difference is 4%.
By above description it is found that the beneficial effect of the embodiment of the present invention is, by calculating section line impedance of registering one's residence
User can be monitored to register one's residence the health degree of section line impedance, if certain user's impedance significantly increases as time goes by, the use
There may be aging circuits at family, are compared by aging threshold, that is, determine what certain user overheated with the presence or absence of broken string or line impedance
Danger can then take interruption maintenance in this way.The aging threshold setting of cable and material, the model of cable are closely related, with BV10
For square millimeter cable, the general value of impedance is 1.75 Europe/km, and aging threshold setting is generally the 20 of normal impedance
Times or more,
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (10)
- A section line impedance estimation method 1. one kind is registered one's residence characterized by comprisingStep S1 measures terminal three-phase voltage at the building electricity box always place's of opening acquisition branch point by non-register one's residence, enters in each user User's electric current is acquired at the switch of family；Step S2, by active power lifting, active power is fallen, reactive power changes and the acquisition of load operation period rule And compare, carry out electrothermal load identification；Step S3 constructs circuit model according to the low-voltage network network topology structure of building electricity box to user, and for described Circuit model establishes impedance computation mathematical model；Electrothermal load identification result is substituted into the mathematical model by step S4, is carried out equation based on binary linear regression method and is asked Solution obtains a section line impedance of registering one's residence.
- 2. the method according to claim 1, wherein the step S1 is specifically included:Three-phase voltage instantaneous value is acquired by the non-voltage transformer measured in terminal of registering one's residence, and does point of basic data virtual value Analysis, the sequence chart that the voltage effective value formed at electricity box is distributed at any time；The grid-connected critical point current instantaneous value of user is acquired by the non-current transformer measured in terminal of registering one's residence, and does point of virtual value Analysis, FFP frequency analysis form the sequence chart that total current virtual value of registering one's residence is distributed at any time.
- 3. the method according to claim 1, wherein the step S2 is specifically included:Step S21, the grid-connected critical point current instantaneous value of three-phase voltage instantaneous value and user based on acquisition carry out integral calculation, obtain Obtain active power sequence P (t), reactive power sequence Q (t)；Step S22, with the active power variation delta P (t) of two period of setting time interval calculation, reactive power variation delta Q(t)；Step S23, judges whether active power variation delta P (t) is greater than the rated value P of settingVolume, if so, recording the lifting Moment is ton, record active power lifting value is Δ Pu, reactive power lifting value is Δ Qu, and the series data is charged into load Identification is according to list；Step S24, judges whether active power variation delta P (t) is less than the rated value P of settingVolume, fall if so, recording this Moment is toff, it is Δ P that record active power, which falls value,d, it is Δ Q that reactive power, which falls value,d, and the series data is charged into load Identification is according to list；Step S25, works as satisfaction | Δ Pu|≈|ΔPd|>PVolume；|ΔQu|≈|ΔQd| when ≈ 0, judge the load for electrothermal load, and Record the operation data of the electrothermal load.
- 4. according to the method described in claim 3, it is characterized in that, the rated value P of the settingVolumeIt is set as 2500W.
- 5. according to the method described in claim 3, it is characterized in that, the operation data of the electrothermal load of record includes: that electric heating is negative Lotus working hour (ton, toff)；The Power x Time P of electrothermal load working hourR(t), the current time of electrothermal load working hour Sequence IR(t)；End voltage time sequence U (t) at the electricity box of electrothermal load working hour.
- 6. the method according to claim 1, wherein specifically utilizing the pure of electrothermal load in the step S3 Resistive linear C-V characteristic relationship and Kirchhoff's second law establish impedance computation mathematical modulo for the circuit model Type.
- 7. the method according to claim 1, wherein since at electricity box node, registering one's residence in the circuit model Section line impedance is approximately equal to purely resistive load, and the place of being spaced apart of registering one's residence is the total node of family, is parallel to and is spaced apart with indoor electrical equipment Node, each equipment are equivalent to corresponding purely resistive load, induction motors load, capacitive load, and electrothermal load is equivalent to purely resistive Load.
- 8. the method according to the description of claim 7 is characterized in that the impedance computation mathematical model that the step S3 is established is such as Under:UC=IC1ZC1+IRRIn above formula, UCFor end voltage, Z at electricity boxC1For a section line impedance of registering one's residence, IC1For a section line current of registering one's residence, R is with indoor electricity The impedance of thermic load, IRFor with indoor electrothermal load electric current.
- 9. according to the method described in claim 8, it is characterized in that, the step S4 is specifically included:Step S41 transfers the operation data of multiple groups electrothermal load from historical data base, is denoted as m group (ton, toff)；Step S42 obtains selected each run the period (t of m groupon, toff) during electricity box at end voltage time sequence U (t), User total current time series I (t), with indoor electrothermal load current time sequence IR(t)；Step S43, by end voltage time sequence U (t) at electricity box, user total current time series I (t), with indoor electrothermal load Current time sequence IR(t) above-mentioned mathematical model is substituted into respectively, forms time series equation group；Step S44 is selected binary linear regression method, is solved to time series equation group by MATLAB calculating instrument, Obtain the impedance value R and section line impedance Z that registers one's residence of electrothermal loadC1。
- 10. according to the method described in claim 9, it is characterized in that, in the step S41, the foundation for transferring operation data is Each electrothermal load run the period, end voltage is all different at electricity box.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613338A (en) * | 2019-02-12 | 2019-04-12 | 江苏智臻能源科技有限公司 | A kind of low-voltage customer circuit resistance estimation method based on linear model |
| CN110672934A (en) * | 2019-08-23 | 2020-01-10 | 北京中电飞华通信股份有限公司 | Non-invasive load identification method, terminal and system |
| CN111062176A (en) * | 2019-12-09 | 2020-04-24 | 国网山西省电力公司长治供电公司 | Low-voltage user loop impedance binary linear model construction and solving method |
| CN115825634A (en) * | 2023-02-16 | 2023-03-21 | 上海红檀智能科技有限公司 | Malignant load identification method based on load complex impedance characteristics |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08220169A (en) * | 1995-02-16 | 1996-08-30 | Shoichi Yamaura | Diagnosis for preventing overheat accident of connecting part in load circuit |
| CN103972889A (en) * | 2014-05-23 | 2014-08-06 | 国家电网公司 | Distribution line impedance online identification method |
| CN104459413A (en) * | 2014-12-17 | 2015-03-25 | 朱明� | Multi-loop electricity monitoring device capable of achieving intelligent household electricity utilization management |
-
2018
- 2018-08-31 CN CN201811007697.XA patent/CN109190242B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08220169A (en) * | 1995-02-16 | 1996-08-30 | Shoichi Yamaura | Diagnosis for preventing overheat accident of connecting part in load circuit |
| CN103972889A (en) * | 2014-05-23 | 2014-08-06 | 国家电网公司 | Distribution line impedance online identification method |
| CN104459413A (en) * | 2014-12-17 | 2015-03-25 | 朱明� | Multi-loop electricity monitoring device capable of achieving intelligent household electricity utilization management |
Non-Patent Citations (4)
| Title |
|---|
| 刘世填: "在住宅电气设计中常见的若干问题", 《广东建材》 * |
| 刘世填: "在住宅电气设计中常见的若干问题", 《广东建材》, no. 10, 31 December 2011 (2011-12-31), pages 52 * |
| 寇英刚等: "无线电能表串户排查的传输损耗研究", 《哈尔滨理工大学学报》 * |
| 寇英刚等: "无线电能表串户排查的传输损耗研究", 《哈尔滨理工大学学报》, no. 03, 25 May 2018 (2018-05-25), pages 32 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109613338A (en) * | 2019-02-12 | 2019-04-12 | 江苏智臻能源科技有限公司 | A kind of low-voltage customer circuit resistance estimation method based on linear model |
| CN109613338B (en) * | 2019-02-12 | 2021-03-16 | 江苏智臻能源科技有限公司 | Low-voltage user loop impedance estimation method based on unitary model |
| CN110672934A (en) * | 2019-08-23 | 2020-01-10 | 北京中电飞华通信股份有限公司 | Non-invasive load identification method, terminal and system |
| CN111062176A (en) * | 2019-12-09 | 2020-04-24 | 国网山西省电力公司长治供电公司 | Low-voltage user loop impedance binary linear model construction and solving method |
| CN111062176B (en) * | 2019-12-09 | 2023-09-22 | 国网山西省电力公司长治供电公司 | Low-voltage user loop impedance binary linear model construction and solving method |
| CN115825634A (en) * | 2023-02-16 | 2023-03-21 | 上海红檀智能科技有限公司 | Malignant load identification method based on load complex impedance characteristics |
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