CN102520313A - Power external insulation pollution flashover early warning method - Google Patents
Power external insulation pollution flashover early warning method Download PDFInfo
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- CN102520313A CN102520313A CN2011103535160A CN201110353516A CN102520313A CN 102520313 A CN102520313 A CN 102520313A CN 2011103535160 A CN2011103535160 A CN 2011103535160A CN 201110353516 A CN201110353516 A CN 201110353516A CN 102520313 A CN102520313 A CN 102520313A
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Abstract
The invention discloses a power external insulation pollution flashover early warning method. The method comprises the following steps: next to a position where a measurement power transmission and transformation external insulation device locates, placing a sampling surface with same shape and material of the external insulation device and allowing the sampling surface to experience a pollution accumulation and cleaning process with a same meteorological condition of the power transmission and transformation external insulation device, measuring saturation contamination degree of the sampling surface in two times and calculating a saturation contamination degree increment of each day, converting present insulating intensity at a position of a power transmission line into insulation contamination degree of effective insulation, calculating largest safety operation days and residual safety operation days of drought weather pollution accumulation allowed by device external insulation, calculating a ratio pollution flashover risk index K of the residual safety operation days and the largest safety operation days, and making a corresponding measure according to a range of K. According to the invention, problems that the power transmission line can not be cut off timely to measure pollution degree and surface pollution degree representativeness of a measurement standard insulation form is poor are solved.
Description
Technical field
The present invention relates to power external insulation pollution flashover method for early warning, particularly the ultra-high-tension power transmission line external insulation pollution flashover method for early warning of 110kV and above electric pressure.
Background technology
According to statistics, oneself has accounted for second of whole power system accident pollution flashover accident, be only second to the damage to crops caused by thunder accident, and the loss of pollution flashover accident is ten times of the damage to crops caused by thunder accident.Pollution flashover accident involves a wide range of knowledge, and power off time is long, and economic loss is big, is the threat greatly that electric power safety is sent out power supply.Pollution flashover can directly cause power transmission and transformation equipment outer insulation short circuit, line tripping, and reclosing is difficult to successfully when serious, and cause long-time large-area power-cuts, and then cause system crash, be one of catastrophic failure of prestige rib safe operation of power system.
At present, the basic measures of prevention pollution flashover accident are to measure power external insulation surface filth degree, to instruct the power external insulation configuration.Usually, the manual measurement of line insulator surface filth degree needs line outage to carry out, and measure yet present domestic supply load is difficult to more greatly have a power failure, and various unartificial measuring equipment reliability is not high, causes effectively measuring power external insulation surface filth degree.
The maximum filthy degree that insulating surface possibly occur beyond the power external insulation configuration is normally claimed saturated filthy degree again; As the important references object; Yet electrical production needs cleaning power external insulation filth regularly, and causing not, the energy measurement external insulation pollution continues the saturated filthy degree that accumulation just can obtain.
At present, the measurement of the power external insulation surface filth degree filthy degree on measurement standard external insulation surface normally.Even the filthy degree on measurement standard external insulation surface timely and effectively; But the long-pending dirty characteristic difference of variety classes external insulation is huge; And the non-standard external insulation of most use in the transmission line of electricity; So the filthy degree on measurement standard external insulation surface, the representativeness in actual electrical production is poor, loses to instruct the filthy meaning of cleaning power external insulation.
Summary of the invention
Technical matters to be solved by this invention provides a kind of power external insulation pollution flashover method for early warning; Utilize said method not only can intuitively effectively monitor the operation conditions of transmission line of electricity external insulation; Instruct the configuration of transmission line of electricity external insulation; Can also instruct the safe operation of transmission line of electricity according to the configuration and the operation conditions thereof of transmission line of electricity external insulation.
Technical matters to be solved by this invention realizes through following technical scheme.
A kind of power external insulation pollution flashover method for early warning, it comprises the steps:
(1) measuring the sampling surface of power transmission and transformation external insulation equipment present position next door placement with external insulation equipment identical appearance and material;
(2) sampling surface and power transmission and transformation external insulation equipment experience the long-pending dirt and the cleaning process of equal meteorological condition;
(3) finish the saturated filthy degree that the back is measured the sampling surface for the first time in rainy season;
(4) measure for the second time the saturated filthy degree on sampling surface after being separated by one month;
(5) according to the measurement variation of step (3) and (4), calculate the saturated filthy degree increment of every day;
(6) according to standard GB/T16434-1966 " dirty level and the Insulation Selection standard distinguished of high-tension overhead line and generating plant, electric substation environment " with the existing dielectric strength in transmission line of electricity somewhere be scaled its insulation filth degree that can effectively insulate;
(7) with the saturated filthy degree increment of the filthy degree of insulation divided by every day of step (5), the merchant is exactly that equipment outer insulation allows the long-pending dirty maximum safe operation fate of arid weather;
(8) deduct the saturated filthy degree of step (4) with the filthy degree of insulation, divided by the saturated filthy degree increment of every day of step (5), the merchant is exactly that equipment outer insulation allows the maximum long-pending dirty residue safe operation fate of arid weather that continues again;
(9) ratio of maximum safe operation fate of residue safe operation fate and step (7) of getting step (8) is divided pollution flashover risk index K with reference to subordinate list 1, and is taked corresponding measure as pollution flashover risk index K.
Table 1 dirty district grade classification table and counter-measure thereof
| K value scope | The pollution flashover early warning | Corresponding measure |
| K≥1 | The pollution level especially severe | Strengthen circuit inspection work, annually must clean circuit, strengthen line insulation as early as possible |
| 0.8≤ K＜1 | Pollution level is serious | Strengthen circuit inspection work, annual necessary cleaning circuit, apparent time machine reinforcement line insulation |
| 0.6≤ K＜0.8 | The pollution level moderate | Strengthen circuit inspection work, arrange in 1 ~ 2 year circuit to be cleaned once |
| 0.4≤ K＜0.6 | Pollution level is normal or slight | Arrange in 3 ~ 5 years circuit to be cleaned once |
| K＜0.4 | Safe condition | Need not to take measures |
Compare with existing filthy degree measuring method, the present invention has following advantage:
(1) the invention solves transmission line of electricity and can't in time have a power failure and measure the problem of filthy degree, make that power external insulation filth degree surveying work is easy, safety also can in time be carried out;
(2) the invention solves the problem that transmission line of electricity can't effectively be measured saturated filthy degree, make the power external insulation configuration have better reference frame;
(3) the invention solves the representative poor problem of measurement standard insulation form surface filth degree, make filthy degree instruct the filth of cleaning power external insulation that better directive significance is arranged the locality.
Embodiment
Power external insulation pollution flashover method for early warning embodiment of the present invention, it comprises the steps:
(1) on the sampling surface of measuring power transmission and transformation external insulation equipment present position next door close profile of placement and material with external insulation equipment;
(2) sampling surface and power transmission and transformation external insulation equipment experience the long-pending dirt and the cleaning process of equal meteorological condition;
(3) finish the saturated filthy degree that the back is measured the sampling surface for the first time in rainy season;
(4) measure for the second time the saturated filthy degree on sampling surface after being separated by one month;
(5) according to the measurement variation of step (3) and (4), calculate the saturated filthy degree increment of every day;
(6) according to standard GB/T16434-1966 " dirty level and the Insulation Selection standard distinguished of high-tension overhead line and generating plant, electric substation environment " with the existing dielectric strength in transmission line of electricity somewhere be scaled its filthy degree that can effectively the insulate filthy degree that promptly insulate;
(7) with the saturated filthy degree increment of the filthy degree of insulation divided by every day of step (5), the merchant is exactly that equipment outer insulation allows the long-pending dirty maximum safe operation fate of arid weather;
(8) deduct the saturated filthy degree of step (4) with the filthy degree of insulation, divided by the saturated filthy degree increment of every day of step (5), the merchant is exactly that equipment outer insulation allows the maximum long-pending dirty residue safe operation fate of arid weather that continues again;
(9) ratio of maximum safe operation fate of residue safe operation fate and step (7) of getting step (8) is divided pollution flashover risk index K with reference to subordinate list 1, and is taked corresponding measure as pollution flashover risk index K.
Table 1 dirty district grade classification table and counter-measure thereof
| K value scope | The pollution flashover early warning | Corresponding measure |
| K≥1 | The pollution level especially severe | Strengthen circuit inspection work, annually must clean circuit, strengthen line insulation as early as possible |
| 0.8≤ K＜1 | Pollution level is serious | Strengthen circuit inspection work, annual necessary cleaning circuit, apparent time machine reinforcement line insulation |
| 0.6≤ K＜0.8 | The pollution level moderate | Strengthen circuit inspection work, arrange in 1 ~ 2 year circuit to be cleaned once |
| 0.4≤ K＜0.6 | Pollution level is normal or slight | Arrange in 3 ~ 5 years circuit to be cleaned once |
| K＜0.4 | Safe condition | Need not to take measures |
Claims (1)
1. power external insulation pollution flashover method for early warning, it comprises the steps:
(1) measuring the sampling surface of power transmission and transformation external insulation equipment present position next door placement with external insulation equipment identical appearance and material;
(2) sampling surface and power transmission and transformation external insulation equipment experience the long-pending dirt and the cleaning process of equal meteorological condition;
(3) finish the saturated filthy degree that the back is measured the sampling surface for the first time in rainy season;
(4) measure for the second time the saturated filthy degree on sampling surface after being separated by one month;
(5) according to the measurement variation of step (3) and (4), calculate the saturated filthy degree increment of every day;
(6) according to standard GB/T16434-1966 " dirty level and the Insulation Selection standard distinguished of high-tension overhead line and generating plant, electric substation environment " with the existing dielectric strength in transmission line of electricity somewhere be scaled its insulation filth degree that can effectively insulate;
(7) with the saturated filthy degree increment of the filthy degree of insulation divided by every day of step (5), the merchant is exactly that equipment outer insulation allows the long-pending dirty maximum safe operation fate of arid weather;
(8) deduct the saturated filthy degree of step (4) with the filthy degree of insulation, divided by the saturated filthy degree increment of every day of step (5), the merchant is exactly that equipment outer insulation allows the maximum long-pending dirty residue safe operation fate of arid weather that continues again;
(9) ratio of maximum safe operation fate of residue safe operation fate and step (7) of getting step (8) is taked corresponding measure as pollution flashover risk index K according to K value scope:
K>=1, pollution flashover early warning: pollution level especially severe, corresponding measure: strengthen circuit inspection work, annually must clean circuit, strengthen line insulation as early as possible; 0.8≤
K＜1, the pollution flashover early warning: pollution level is serious, corresponding measure: strengthen circuit inspection work, annual necessary cleaning circuit, apparent time machine reinforcement line insulation; 0.6≤
K＜0.8, pollution flashover early warning: pollution level moderate, corresponding measure: strengthen circuit inspection work, arrange in 1 ~ 2 year circuit to be cleaned once; 0.4≤
K＜0.6, the pollution flashover early warning: pollution level is normal or slight, corresponding measure: arrange in 3 ~ 5 years circuit to be cleaned once;
K＜0.4, pollution flashover early warning: safe condition, corresponding measure: need not to take measures.
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| CN2011103535160A CN102520313A (en) | 2011-11-10 | 2011-11-10 | Power external insulation pollution flashover early warning method |
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| CN2011103535160A CN102520313A (en) | 2011-11-10 | 2011-11-10 | Power external insulation pollution flashover early warning method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065212A (en) * | 2012-11-19 | 2013-04-24 | 南京南瑞集团公司 | Electric transmission line pollution flashover early warning system based on weather numerical forecasting and method thereof |
| CN103245761A (en) * | 2013-04-28 | 2013-08-14 | 华南理工大学 | Method for grading polluted areas through pollution rates |
| CN103624053A (en) * | 2013-12-01 | 2014-03-12 | 国网河南省电力公司安阳供电公司 | Field anti-pollution flashover processing technology for high-voltage wall bushing |
| CN104657615A (en) * | 2015-02-28 | 2015-05-27 | 武汉大学 | Method for predicting contamination degree of power transmission line after forest fire |
| CN106093718A (en) * | 2016-05-30 | 2016-11-09 | 中国南方电网有限责任公司电网技术研究中心 | A kind of insulator arc-over method for prewarning risk |
| CN110768144A (en) * | 2019-09-27 | 2020-02-07 | 衢州光明电力投资集团有限公司 | Method for rapidly recovering composite external insulation operation performance of power transmission and transformation equipment |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103065212A (en) * | 2012-11-19 | 2013-04-24 | 南京南瑞集团公司 | Electric transmission line pollution flashover early warning system based on weather numerical forecasting and method thereof |
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| CN103245761A (en) * | 2013-04-28 | 2013-08-14 | 华南理工大学 | Method for grading polluted areas through pollution rates |
| CN103245761B (en) * | 2013-04-28 | 2015-08-26 | 华南理工大学 | A kind of method dividing dirty district grade with contamination speed |
| CN103624053A (en) * | 2013-12-01 | 2014-03-12 | 国网河南省电力公司安阳供电公司 | Field anti-pollution flashover processing technology for high-voltage wall bushing |
| CN104657615A (en) * | 2015-02-28 | 2015-05-27 | 武汉大学 | Method for predicting contamination degree of power transmission line after forest fire |
| CN104657615B (en) * | 2015-02-28 | 2017-09-22 | 武汉大学 | A kind of method that power transmission line pollution degree is predicted after generation mountain fire |
| CN106093718A (en) * | 2016-05-30 | 2016-11-09 | 中国南方电网有限责任公司电网技术研究中心 | A kind of insulator arc-over method for prewarning risk |
| CN106093718B (en) * | 2016-05-30 | 2019-11-22 | 中国南方电网有限责任公司电网技术研究中心 | A kind of insulator arc-over method for prewarning risk |
| CN110768144A (en) * | 2019-09-27 | 2020-02-07 | 衢州光明电力投资集团有限公司 | Method for rapidly recovering composite external insulation operation performance of power transmission and transformation equipment |
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Application publication date: 20120627 |