CN105094032A - Distribution network line trip monitoring method - Google Patents

Distribution network line trip monitoring method Download PDF

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Publication number
CN105094032A
CN105094032A CN201510509390.XA CN201510509390A CN105094032A CN 105094032 A CN105094032 A CN 105094032A CN 201510509390 A CN201510509390 A CN 201510509390A CN 105094032 A CN105094032 A CN 105094032A
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real time
load
time
real
time load
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CN201510509390.XA
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CN105094032B (en
Inventor
高立志
崔志国
赵长耀
杨鑫
孔德明
李庆波
宋健
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State Grid Corp of China SGCC
TaiAn Power Supply Co of State Grid Shandong Electric Power Co Ltd
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State Grid Corp of China SGCC
TaiAn Power Supply Co of State Grid Shandong Electric Power Co Ltd
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/048—Monitoring; Safety

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention provides a distribution network line trip monitoring method which comprises the following steps: 100) sampling real-time loads of a line at a substation master control center every fixed-time interval; 200) carrying out de-noising processing on a real-time load sample set; 300) calculating the basic load; 400) calculating real-time load change rate and real-time load change speed; 500) if the absolute value of the real-time load change rate is smaller than a second threshold value and the absolute value of the real-time load change speed is smaller than a third threshold value, carrying out real-time time update, sampling the real-time loads of the distribution network line and entering the step 400), or otherwise, entering the step 600); and 600) sending warning display information to remind the distribution network line to trip.

Description

A kind of distribution line tripping operation method for supervising
Technical field
The present invention relates to electric power safety field, particularly a kind of distribution line tripping operation method for supervising.
Background technology
For ensureing electrical network distribution more reliability service, improve running quality and service quality, 10kV distribution line has installed intelligent switch, and distribution automation system can the situation of display switch displacement accurately.But also have more part circuit to be equiped with non-automated switch at present, often lose more load during this switch trip and not easily find, causing large area to have a power failure for a long time, impact is produced.
Summary of the invention
The present invention, for solving the problem, provides a kind of distribution line tripping operation method for supervising.
According to one embodiment of the invention, a kind of distribution line tripping operation method for supervising is provided, it is characterized in that, comprise the following steps:
Step 100, at the real time load of the described distribution line of time t, t-Δ t, t-2 Δ t...t-(n-1) Δ t place sampling, is designated as I respectively t, I t-Δ t... I t-(n-1) Δ tif, sampled result I t, I t-Δ t... I t-(n-1) Δ tall non-vanishing, then stored in real time load sampling set I rif, sampled result I t, I t-Δ t... I t-(n-1) Δ tbe not zero entirely, then at the real time load of the described distribution line of time t-n Δ t, t-(n+1) Δ t, t-(n+2) Δ t... place sampling, until obtain the sampled result that n to be not equal to zero, and the sampled result described n being not equal to zero is stored in real time load sampling set I r;
Wherein, t is current real-time time; Δ t is sampling time interval; N be user for obtain be not equal to zero sampled result number, by User Defined, be preferably 5;
Step 200, to described real time load sampling set I rcarry out denoising, described denoising comprises when the sampled result of described real time load is greater than first threshold T, thinks that described real time load sampled result is noise; When the sampled result of described real time load is less than or equal to described first threshold T, think real time load efficiently sampling result, stored in service load set I v; Note I rmiddle element is I 1, I 2... I n, then the computing formula of described first threshold T is as follows:
T = 3 * 1 n Σ i = 1 n ( I i - 1 n Σ i = 1 n I i ) 2 + 1 n Σ i = 1 n I i ;
Wherein, n is real-time sampling set I relement number, I ii rin i-th element;
Step 300, calculates basic load, note service load set I vmiddle element is I v1, I v2... I vk, then basic load computing formula is:
I f = 1 k Σ j = 1 k I V j ;
Wherein, k is the element number of service load set, I vjfor a jth element in set;
Step 400, calculates current real-time time t place described real time load rate of change I pwith real time load pace of change I t', computing formula is as follows:
I p = I t - I f I f * 100 % ;
I t ′ = I t - I ( t - Δ t ) Δ t ;
Wherein, I tit is the real time load of the described distribution line in current real-time time t place; I fit is basic load; Δ t is sampling time interval; I t-Δ tit is the real time load of the described distribution line in time t-Δ t place;
Step 500, if described real time load rate of change I pabsolute value be less than Second Threshold and described real time load pace of change I t' absolute value be less than the 3rd threshold value, then real-time time t is updated to t=t+ Δ t, time t place sampling described distribution network circuit real time load and proceed to step 400; Otherwise proceed to step 600;
Step 600, sends alarm display information, the tripping operation of prompting distribution line.
Further, sampling process in described step 100 mainly obtains data by systems such as the master server of access transformer station Master Control Center and energy management, data acquisition and Monitor and Control, in described sampling process for obtain be not equal to zero sampled result number can by User Defined, be preferably 5 times; Sampling time interval by User Defined, can be preferably 5 seconds.
Further, in described step 200, the method for denoising comprises, and calculate first threshold according to described real time load set, the sampled result exceeding first threshold is thought noise and abandons.
Further, in described step 500, the situation of different circuit is depended in the selection of the 3rd threshold value.According to distribution line robotization switch installation principle, generally choose the ratio that end two robotization switch institute on-loads account for whole piece circuit.
Further, in the alarm procedure for displaying of described step 600, while sending alarm display, also can send SMS Tip by SMS platform to the tour personnel on this circuit.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with the embodiment of the present invention, technical scheme of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides the method for a kind of distribution line tripping operation Timeliness coverage, comprise the following steps:
Step 100, at the real time load of the described distribution line of time t, t-Δ t, t-2 Δ t...t-(n-1) Δ t place sampling, is designated as I respectively t, I t-Δ t... I t-(n-1) Δ tif, sampled result I t, I t-Δ t... I t-(n-1) Δ tall non-vanishing, then stored in real time load sampling set I rif, sampled result I t, I t-Δ t... I t-(n-1) Δ tbe not zero entirely, then at the real time load of the described distribution line of time t-n Δ t, t-(n+1) Δ t, t-(n+2) Δ t... place sampling, until obtain the sampled result that n to be not equal to zero, and the sampled result described n being not equal to zero is stored in real time load sampling set I r;
Wherein, t is current real-time time; Δ t is sampling time interval; N be user for obtain be not equal to zero sampled result number, by User Defined, be preferably 5;
Step 200, to described real time load sampling set I rcarry out denoising, described denoising comprises when the sampled result of described real time load is greater than first threshold T, thinks that described real time load sampled result is noise; When the sampled result of described real time load is less than or equal to described first threshold T, think real time load efficiently sampling result, stored in service load set I v; Note I rmiddle element is I 1, I 2... I n, then the computing formula of described first threshold T is as follows:
T = 3 * 1 n Σ i = 1 n ( I i - 1 n Σ i = 1 n I i ) 2 + 1 n Σ i = 1 n I i ;
Wherein, n is real-time sampling set I relement number, I ii rin i-th element;
Step 300, calculates basic load, note service load set I vmiddle element is I v1, I v2... I vk, then basic load computing formula is:
I f = 1 k Σ j = 1 k I V j ;
Wherein, k is the element number of service load set, I vjfor a jth element in set;
Step 400, calculates current real-time time t place described real time load rate of change I pwith real time load pace of change I t', computing formula is as follows:
I p = I t - I f I f * 100 % ;
I t ′ = I t - I ( t - Δ t ) Δ t ;
Wherein, I tit is the real time load of the described distribution line in current real-time time t place; I fit is basic load; Δ t is sampling time interval; I t-Δ tit is the real time load of the described distribution line in time t-Δ t place;
Step 500, if described real time load rate of change I pabsolute value be less than Second Threshold and described real time load pace of change I t' absolute value be less than the 3rd threshold value, then real-time time t is updated to t=t+ Δ t, time t place sampling described distribution network circuit real time load and proceed to step 400; Otherwise proceed to step 600;
An embodiment again, obtains loading rate I pwith load pace of change I t' after, remember that all loading rate sequences are for { I p1, I p2... I pl, all load pace of change sequences are { I t1', I t2' ... I tm', calculate k 0 = α ( | ( I p - 1 l Σ i = 1 l I p i ) 1 l Σ i = 1 l ( I p i - 1 l Σ i = 1 l I p i ) 2 | ) + β ( I t ′ - min ( I t ′ ) max ( I t ′ ) - min ( I t ′ ) ) , Wherein i=1,2...l, alpha+beta=1, α, β can by User Defineds.When the absolute value of loading rate is less than Second Threshold and the absolute value of real time load pace of change is less than the 3rd threshold value, if k 0be less than the 4th threshold value, then real-time time t be updated to t=t+ Δ t, time t place sampling described distribution network circuit real time load and proceed to step 400; Otherwise proceed to step 600; Wherein Second Threshold is preferably 30%, and the 3rd threshold value is determined, α according to line standard load difference, and β value is preferably 0.5, and the 4th threshold value is preferably 0.76.
In described step 500, described decision logic can in most of the cases find trip condition and give a warning, but as loading rate I pclose on Second Threshold and load pace of change I t' when closing on the 3rd threshold value simultaneously, also probably there is trip phenomenon, in order to address this problem, have employed in above-described embodiment and loading rate and load pace of change are combined the technical scheme carrying out judging, thus improve judgement precision, effectively can avoid security loss.
Step 600, sends alarm display information, the tripping operation of prompting distribution line.
Concrete, after determining to proceed to alarm procedure for displaying by logic step, alarm procedure for displaying sends alarm display information, sends SMS Tip by SMS platform to the tour personnel on this circuit simultaneously, prompting Dispatchers on duty checks distribution automation system, and checks with field staff.
The distribution line tripping operation method for supervising of the present embodiment can find distribution line trip phenomenon fast and give a warning, so that staff can Timeliness coverage line fault also investigate in time.
Other and method something in common are not repeated herein, and details please refer to method declaratives.
The embodiment of the present invention effectively can monitor distribution line load situation of change, Timeliness coverage circuit exception also gives a warning, facilitate the supervision that user strengthens electric power networks in actual applications, improve the malfunction elimination rate of circuit, ensure the safe operation of electric power networks.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (3)

1. a distribution line tripping operation method for supervising, is characterized in that, comprise the following steps:
Step 100, at the real time load of the described distribution line of time t, t-Δ t, t-2 Δ t...t-(n-1) Δ t place sampling, is designated as I respectively t, I t-Δ t... I t-(n-1) Δ tif, sampled result I t, I t-Δ t... I t-(n-1) Δ tall non-vanishing, then stored in real time load sampling set I rif, sampled result I t, I t-Δ t... I t-(n-1) Δ tbe not zero entirely, then at the real time load of the described distribution line of time t-n Δ t, t-(n+1) Δ t, t-(n+2) Δ t... place sampling, until obtain the sampled result that n to be not equal to zero, and the sampled result described n being not equal to zero is stored in real time load sampling set I r, wherein t is current real-time time, and Δ t is sampling time interval, be preferably 5 seconds, n be not equal to zero sampled result number, be preferably 5;
Step 200, to described real time load sampling set I rcarry out denoising, described denoising comprises when the sampled result of described real time load is greater than first threshold T, thinks that described real time load sampled result is noise; When the sampled result of described real time load is less than or equal to described first threshold T, think real time load efficiently sampling result, stored in service load set I v; Note I rmiddle element is I 1, I 2... I n, then the computing formula of described first threshold T is as follows:
T = 3 * 1 n Σ i = 1 n ( I i - 1 n Σ i = 1 n I i ) 2 + 1 n Σ i = 1 n I i ;
Wherein, I ii rin i-th element;
Step 300, calculates basic load, comprising: note service load set I vmiddle element is I v1, I v2... I vk, wherein k is the element number of service load set, I vjfor a jth element in set, then basic load
Step 400, calculates the real time load rate of change I at current real-time time t place pwith real time load pace of change I ' t, computing formula is as follows:
I p = I t - I f I f * 100 % ;
I t ′ = I t - I ( t - Δ t ) Δ t ;
Wherein, I tit is the real time load of the described distribution line in current real-time time t place; I t-Δ tit is the real time load of the described distribution line in time t-Δ t place;
Step 500, if described real time load rate of change I pabsolute value be less than Second Threshold and described real time load pace of change I ' tabsolute value be less than the 3rd threshold value, then real-time time t is updated to t=t+ Δ t, time t place sampling described distribution network circuit real time load and proceed to step 400; If described real time load rate of change I pabsolute value be not less than Second Threshold or described real time load pace of change I ' tabsolute value be not less than the 3rd threshold value, then proceed to step 600;
Step 600, sends alarm display information, the tripping operation of prompting distribution line.
2. distribution line tripping operation method for supervising as claimed in claim 1, it is characterized in that, in described step 500, the situation of different circuit is depended in the selection of the 3rd threshold value.According to distribution line robotization switch installation principle, generally choose the ratio that end two robotization switch institute on-loads account for whole piece circuit.
3. distribution line tripping operation method for supervising as claimed in claim 1, is characterized in that, in the alarm procedure for displaying of described step 600, while sending alarm display, also can send SMS Tip by SMS platform to the tour personnel on this circuit.
CN201510509390.XA 2015-08-18 2015-08-18 A kind of distribution line tripping operation monitoring method Active CN105094032B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112350849A (en) * 2020-09-15 2021-02-09 国网浙江省电力有限公司湖州供电公司 Intelligent setting and updating system for power monitoring data threshold value

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CN101013808A (en) * 2005-09-16 2007-08-08 施耐德电器工业公司 Electronic trip device, circuit breaker equipped with such trip device, and monitoring method
CN101860007A (en) * 2010-04-20 2010-10-13 山东卓尔电气有限公司 Remote intelligent residual current monitoring and protection system
US20130073257A1 (en) * 2011-09-19 2013-03-21 Craig Benjamin Williams Method, device, and system for monitoring a component
CN203491142U (en) * 2013-09-30 2014-03-19 国家电网公司 Air switch trip-out monitoring system

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Publication number Priority date Publication date Assignee Title
US20040066595A1 (en) * 2001-09-12 2004-04-08 Tignor Michael S. Method and apparatus for accessing and activating accessory functions of electronic circuit breakers
CN101013808A (en) * 2005-09-16 2007-08-08 施耐德电器工业公司 Electronic trip device, circuit breaker equipped with such trip device, and monitoring method
CN101860007A (en) * 2010-04-20 2010-10-13 山东卓尔电气有限公司 Remote intelligent residual current monitoring and protection system
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112350849A (en) * 2020-09-15 2021-02-09 国网浙江省电力有限公司湖州供电公司 Intelligent setting and updating system for power monitoring data threshold value
CN112350849B (en) * 2020-09-15 2022-07-29 国网浙江省电力有限公司湖州供电公司 Intelligent setting and updating system for power monitoring data threshold value

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