CN103063985A - Very fast transient overvoltage horizontal identification method - Google Patents
Very fast transient overvoltage horizontal identification method Download PDFInfo
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- CN103063985A CN103063985A CN2012105554974A CN201210555497A CN103063985A CN 103063985 A CN103063985 A CN 103063985A CN 2012105554974 A CN2012105554974 A CN 2012105554974A CN 201210555497 A CN201210555497 A CN 201210555497A CN 103063985 A CN103063985 A CN 103063985A
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Abstract
The invention provides a very fast transient overvoltage horizontal identification method which comprises the following steps: building an electromagnetic transient simulation model which simulates very fast transient overvoltage generated in an operation process of a disconnector; conducting simulating calculation to the very fast transient overvoltage and obtaining very fast transient overvoltage amplitude value distribution on different electrical devices of a transformer substation through statistics; and accounting very fast transient overvoltage levels on the different electrical devices of the transformer substation. According to the very fast transient overvoltage horizontal identification method, a probability character and a space distribution character of the very fast transient overvoltage (VFTO) generated in operation of the disconnector are fully considered, insulation configuration is improved and cost is reduced.
Description
Technical field
The invention belongs to the high voltage isolation techniques field, be specifically related to a kind of very fast transient overvoltage horizontal determining method.
Background technology
Gas-insulated switchgear (gas insulated switchgear, GIS) isolator operation can produce very fast transient overvoltage (very fast transient overvoltage, VFTO), threatens the insulation of equipment.At present in the engineering under the VFTO Insulation Coordination method mainly with equipment lightning impulse dielectric level (Lightning Impulse withstand voltage, LIWV) be foundation, between equipment LIWV and the most serious VFTO of calculating gained, consider certain margin of safety (generally adopting 15%).When definite VFTO level, only to get under the most serious operating mode, the VFTO maximal value at diverse location place is not considered probability nature and the spatial characteristics of VFTO amplitude as the basis of Insulation Coordination in the GIS of the transformer station equipment.
During isolator operation among the ultra-high/extra-high voltage GIS, because its responsiveness is lower, the contact gap that can produce tens of times repeats to puncture, and produces the very fast transient overvoltage (VFTO) that amplitude is higher, steepness is very large, frequency is very high, may cause GIS equipment and transformer to damage when serious.
Fig. 1 is that the GIS disconnector suits the circuit theory diagrams that generation VFTO is repeated to puncture in unloaded short bus generation contact gap.Take the disconnector separating brake as example, after isolation switch contact separates, unloaded bus is in the floating potential state, mains side is that power-frequency voltage constantly changes, form recovery voltage in the contact gap, when recovery voltage surpassed contact gap dielectric dielectric strength, the contact gap breakdown produced electric arc, and produced VFTO.When the VFTO decay finishes, arc extinction, unloaded bus is got back to the floating potential state, until puncture next time, so forms and repeats breakdown process.Each breakdown process all can produce VFTO.Separating brake process disconnector both sides voltage typical waveform as shown in Figures 2 and 3.The making process principle is similar.
The Insulation Coordination method is when definite VFTO level at present, only consider the most harsh situation, suppose that namely both sides, isolation switch contact gap voltage is to puncture in the situation of power frequency peak value and single spin-echo, obtain the most serious VFTO, do not consider that isolator operation produces the probability nature of VFTO amplitude.The VFTO that isolator operation produces is subject to the impact of isolator operation moment, switch dynamic perfromance etc., and its amplitude has very strong randomness, and the probability that above-mentioned the most serious situation occurs is extremely low, does not conform to the actual conditions of isolator operation generation VFTO.
In addition, at present the Insulation Coordination method when definite VFTO level, the VFTO of maximum in all devices when only considering isolator operation; And the VFTO that actual isolator operation produces has very big-difference in equipment diverse location amplitude, and larger VFTO may only appear at indivedual points, need to all not take same measure for all equipment, all disconnectores.
To sum up, when present VFTO Insulation Coordination method is determined the VFTO level, do not consider probability nature and the spatial characteristics of VFTO, may cause engineering to adopt unnecessary measure, cost increases.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of very fast transient overvoltage horizontal determining method, take into full account probability nature, spatial characteristics that isolator operation produces VFTO, the purpose that optimize insulation configuration to reach, reduces cost.
In order to realize the foregoing invention purpose, the present invention takes following technical scheme:
A kind of very fast transient overvoltage horizontal determining method is provided, said method comprising the steps of:
Step 1: set up the electromagnetic transient simulation model that simulation isolator operation process produces very fast transient overvoltage;
Step 2: very fast transient overvoltage is carried out simulation calculation, and statistics obtains the very fast transient overvoltage amplitude probability distribution on the different power equipments of transformer station;
Step 3: the very fast transient overvoltage level on the different power equipments of statistics transformer station.
In the described step 1, the electromagnetic transient simulation model comprises GIS bus model, GIS element realistic model and disconnector realistic model.
Described GIS bus model is set up based on the GIS of transformer station arrangement parameter, reflection GIS bus length, wave impedance and velocity of wave;
Described GIS element realistic model is set up based on the GIS component equipment parameter of lightning arrester, transformer, voltage transformer (VT) and sleeve pipe;
Described disconnector realistic model is set up based on characterisitic parameter, and reflection isolator operation process repeatedly repeats breakdown process.
Described characterisitic parameter comprises isolation switch contact gap variation characteristic parameter and isolation switch contact gap breakdown voltage characteristic parameter.
Described step 2 may further comprise the steps:
Step 2-1: with isolator operation constantly as random quantity, random operation N time, wherein N〉100;
Step 2-2: add up the different power equipments of transformer station place's generation very fast transient overvoltage maximal value in each operating process;
Step 2-3: obtain N very fast transient overvoltage for a certain power equipment, this N very fast transient overvoltage is done the probability distribution that probability analysis can obtain different very fast transient overvoltage maximal value amplitudes.
Occur when the factor that very fast transient overvoltage is carried out exerting an influence in the simulation calculation process comprises isolator operation repeatedly to repeat to puncture, the very fast transient overvoltage on the isolator operation different power equipments of randomness, transformer station constantly and disconnector minute/closing operation; Described power equipment comprises transformer, sleeve pipe, disconnector, isolating switch and GIS bus.
In the described step 3, get a certain power equipment probability of occurrence and be no more than 5% very fast transient overvoltage maximal value, as the very fast transient overvoltage level of this power equipment.
Compared with prior art, beneficial effect of the present invention is: the present invention considers that isolator operation produces the probability nature of very fast transient overvoltage horizontal amplitude value, adopt the method for adding up to obtain the probability distribution of very fast transient overvoltage level, consider simultaneously the space distribution of different power equipment very fast transient overvoltage levels, determined respectively the VFTO level on the different power equipments.Conform to actual conditions, select based on this braking measure, and carry out Insulation Coordination, can optimize insulation configuration, provide cost savings.
Description of drawings
Fig. 1 is that the GIS disconnector suits the circuit theory diagrams that generation VFTO is repeated to puncture in unloaded short bus generation contact gap;
Fig. 2 is GIS isolator operation mains side voltage oscillogram;
Fig. 3 is GIS isolator operation load side voltage oscillogram;
Fig. 4 is very fast transient overvoltage horizontal determining method process flow diagram;
Fig. 5 is VFTO probability distribution graph in the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Such as Fig. 4, a kind of very fast transient overvoltage horizontal determining method is provided, said method comprising the steps of:
Step 1: set up the electromagnetic transient simulation model that simulation isolator operation process produces very fast transient overvoltage;
Step 2: very fast transient overvoltage is carried out simulation calculation, and statistics obtains the very fast transient overvoltage amplitude probability distribution on the different power equipments of transformer station;
Step 3: the very fast transient overvoltage level on the different power equipments of statistics transformer station.
In the described step 1, the electromagnetic transient simulation model comprises GIS bus model, GIS element realistic model and disconnector realistic model.
Described GIS bus model is set up based on the GIS of transformer station arrangement parameter, reflection GIS bus length, wave impedance and velocity of wave;
Described GIS element realistic model is set up based on the GIS component equipment parameter of lightning arrester, transformer, voltage transformer (VT) and sleeve pipe;
Described disconnector realistic model is set up based on characterisitic parameter, and reflection isolator operation process repeatedly repeats breakdown process.
Described characterisitic parameter comprises isolation switch contact gap variation characteristic parameter and isolation switch contact gap breakdown voltage characteristic parameter.
Described step 2 may further comprise the steps:
Step 2-1: with isolator operation constantly as random quantity, random operation N time, wherein N〉100;
Step 2-2: add up the different power equipments of transformer station place's generation very fast transient overvoltage maximal value in each operating process;
Step 2-3: obtain N very fast transient overvoltage for a certain power equipment, this N very fast transient overvoltage is done the probability distribution that probability analysis can obtain different very fast transient overvoltage maximal value amplitudes.
To typical ultra-high voltage transformer station, VFTO probability distribution such as the Fig. 5 at resulting certain the some place of isolator operation, the probability that is the VFTO of 2.2 ~ 2.3p.u. for this isolator operation generation amplitude is 5%.If take existing general Insulation Coordination method, calculating the most serious VFTO is 2.4p.u., is higher than to have considered the result of calculation after the probability nature.
Occur when the factor that very fast transient overvoltage is carried out exerting an influence in the simulation calculation process comprises isolator operation repeatedly to repeat to puncture, the very fast transient overvoltage on the isolator operation different power equipments of randomness, transformer station constantly and disconnector minute/closing operation; Described power equipment comprises transformer, sleeve pipe, disconnector, isolating switch and GIS bus.
In the described step 3, get a certain power equipment probability of occurrence and be no more than 5% very fast transient overvoltage maximal value, as the very fast transient overvoltage level of this power equipment.
As shown in table 1 such as the VFTO level that can obtain distinct device.
Table 1
| Equipment | VFTO level (pu) |
| The GIS pipeline | 2.3pu |
| Disconnector | 2.2pu |
| Isolating switch | 2.0pu |
The VFTO level of power equipment can be selected corresponding braking measure according to determined statistics VFTO level after determining.
If surpassed equipment LIWV after having the statistics VFTO level of position to take advantage of safety coefficient, then will take corresponding measure:
If a. the VFTO of single position does not satisfy the Insulation Coordination requirement, can in the situation that does not change equipment size, at the independent reinforced insulation in this position, improve equipment LIWV it is met the demands.
If b. apparatus insulated raising measure is infeasible, can consider at the braking measures such as this position installing magnet ring, the VFTO of this position of damping.Need again check the VFTO of other points behind the installing magnet ring.
If c. adopt above-mentioned two kinds of methods all can not meet the demands, consider to produce the disconnector installing damping resistance of this VFTO.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and do not break away from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (7)
1. very fast transient overvoltage horizontal determining method is characterized in that: said method comprising the steps of:
Step 1: set up the electromagnetic transient simulation model that simulation isolator operation process produces very fast transient overvoltage;
Step 2: very fast transient overvoltage is carried out simulation calculation, and statistics obtains the very fast transient overvoltage amplitude probability distribution on the different power equipments of transformer station;
Step 3: the very fast transient overvoltage level on the different power equipments of statistics transformer station.
2. very fast transient overvoltage horizontal determining method according to claim 1, it is characterized in that: in the described step 1, the electromagnetic transient simulation model comprises GIS bus model, GIS element realistic model and disconnector realistic model.
3. very fast transient overvoltage horizontal determining method according to claim 1 is characterized in that: described GIS bus model is set up based on the GIS of transformer station arrangement parameter, reflection GIS bus length, wave impedance and velocity of wave;
Described GIS element realistic model is set up based on the GIS component equipment parameter of lightning arrester, transformer, voltage transformer (VT) and sleeve pipe;
Described disconnector realistic model is set up based on characterisitic parameter, and reflection isolator operation process repeatedly repeats breakdown process.
4. very fast transient overvoltage horizontal determining method according to claim 1, it is characterized in that: described characterisitic parameter comprises isolation switch contact gap variation characteristic parameter and isolation switch contact gap breakdown voltage characteristic parameter.
5. very fast transient overvoltage horizontal determining method according to claim 1, it is characterized in that: described step 2 may further comprise the steps:
Step 2-1: with isolator operation constantly as random quantity, random operation N time, wherein N〉100;
Step 2-2: add up the different power equipments of transformer station place's generation very fast transient overvoltage maximal value in each operating process;
Step 2-3: obtain N very fast transient overvoltage for a certain power equipment, this N very fast transient overvoltage is done the probability distribution that probability analysis can obtain different very fast transient overvoltage maximal value amplitudes.
6. very fast transient overvoltage horizontal determining method according to claim 5 is characterized in that: the factor that very fast transient overvoltage is carried out exerting an influence in the simulation calculation process occurs when comprising isolator operation repeatedly to repeat to puncture, the very fast transient overvoltage on the isolator operation different power equipments of randomness, transformer station constantly and disconnector minute/closing operation; Described power equipment comprises transformer, sleeve pipe, disconnector, isolating switch and GIS bus.
7. very fast transient overvoltage horizontal determining method according to claim 1, it is characterized in that: in the described step 3, get a certain power equipment probability of occurrence and be no more than 5% very fast transient overvoltage maximal value, as the very fast transient overvoltage level of this power equipment.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558527A (en) * | 2013-11-13 | 2014-02-05 | 国家电网公司 | Voltage withstand test analogue simulation method for ultra-high-voltage GIS standard lightning impulse voltage |
| CN103559358A (en) * | 2013-11-13 | 2014-02-05 | 国家电网公司 | Method for analogue simulation of ultrahigh-voltage GIS (gas insulated switchgear) oscillation type lightning surge voltage withstand test |
| CN104392049A (en) * | 2014-11-26 | 2015-03-04 | 国家电网公司 | Modeling method for GIS disconnecting switch high frequency voltaic arc resistance model |
| CN104462655A (en) * | 2014-11-12 | 2015-03-25 | 国家电网公司 | Method for analog calculation of safety performance of GIS metal pipeline system |
| CN105119298A (en) * | 2015-08-11 | 2015-12-02 | 山东大学 | Very fast transient amplitude frequency characteristic analysis method in hybrid reactive power compensation substation |
| CN105186491A (en) * | 2015-08-27 | 2015-12-23 | 国家电网公司 | Assessment method for overvoltage on primary side of electric power system caused by switching operation |
| CN106707126A (en) * | 2017-01-06 | 2017-05-24 | 贵州电网有限责任公司电力科学研究院 | Potential transformer electromagnetic transient modeling and analysis method of VFTO (very fast transient overvoltage) analysis of GIS (gas insulated switchgear) substation |
| CN107153743A (en) * | 2017-05-27 | 2017-09-12 | 山东大学 | VFTO intelligent simulations analysis method and system based on intelligent search algorithm |
| CN103559406B (en) * | 2013-11-13 | 2018-04-17 | 国家电网公司 | A kind of super-pressure GIS pressure tests analogue system and method |
| CN108898189A (en) * | 2018-07-11 | 2018-11-27 | 云南电网有限责任公司电力科学研究院 | A kind of the fingerprint base method for building up and system of VFTO measurement data |
| CN109100620A (en) * | 2018-06-08 | 2018-12-28 | 中国电力科学研究院有限公司 | A kind of verify inhibits conducting wire to the system and method for GIS substation VFTO inhibitory effect |
| CN109270415A (en) * | 2018-08-27 | 2019-01-25 | 云南电网有限责任公司电力科学研究院 | The VFTO method of inspection and system of surface of composite insulator pulse accounting rate |
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| CN113471947A (en) * | 2021-07-27 | 2021-10-01 | 中国电力工程顾问集团西北电力设计院有限公司 | Active suppression method and system for very fast transient overvoltage of GIS |
| CN113933662A (en) * | 2021-09-09 | 2022-01-14 | 中国电力科学研究院有限公司 | Method and system suitable for measuring fracture breakdown voltage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201464546U (en) * | 2009-07-14 | 2010-05-12 | 国网电力科学研究院武汉南瑞有限责任公司 | Device for intelligently monitoring VFTO inside GIS |
| CN101957396A (en) * | 2009-07-14 | 2011-01-26 | 黑龙江省电力科学研究院 | On-line monitoring device and method for voltage quality of electric power system |
| CN102590718A (en) * | 2012-02-22 | 2012-07-18 | 华北电力大学 | System for GIS (Global Information System) partial discharge measurement and VFTO (Very Fast Transient Overvoltage) measurement |
-
2012
- 2012-12-19 CN CN201210555497.4A patent/CN103063985B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201464546U (en) * | 2009-07-14 | 2010-05-12 | 国网电力科学研究院武汉南瑞有限责任公司 | Device for intelligently monitoring VFTO inside GIS |
| CN101957396A (en) * | 2009-07-14 | 2011-01-26 | 黑龙江省电力科学研究院 | On-line monitoring device and method for voltage quality of electric power system |
| CN102590718A (en) * | 2012-02-22 | 2012-07-18 | 华北电力大学 | System for GIS (Global Information System) partial discharge measurement and VFTO (Very Fast Transient Overvoltage) measurement |
Non-Patent Citations (4)
| Title |
|---|
| V.VINOD KUMAR等: "VFTO computation in a 420 KV GIS", 《HIGH VOLTAGE ENGINEERING》 * |
| Y.YAMAGATA等: "Suppression of VFT in 1100kV GIS by adopting resistor-fitted disconnector", 《IEEE TRANSACTIONS ON POWER DELIVERY》 * |
| 陈维江等: "特高压气体绝缘开关设备中特快速瞬态过电压特性的试验研究", 《中国电机工程学报》 * |
| 韩彬等: "隔离开关操作速度对特快速瞬态过电压的影响", 《中国电机工程学报》 * |
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