CN102879696A - Automatic judgment method for over-load operational feasibility of transformer - Google Patents
Automatic judgment method for over-load operational feasibility of transformer Download PDFInfo
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- CN102879696A CN102879696A CN2012104108425A CN201210410842A CN102879696A CN 102879696 A CN102879696 A CN 102879696A CN 2012104108425 A CN2012104108425 A CN 2012104108425A CN 201210410842 A CN201210410842 A CN 201210410842A CN 102879696 A CN102879696 A CN 102879696A
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Abstract
The invention relates to an automatic judgment method for over-load operational feasibility of a transformer. The method comprises the following steps of: (1) acquiring meteorological data of an environment where the transformer is positioned, equipment parameters of the transformer and operation state data of the transformer; (2) calculating hot spot temperature of the transformer through a thermal circuit calculation model according to data acquired in the step (1); (3) performing pre-cooling analysis, over-load analysis and radiating analysis on the transformer according to the hot spot temperature of the transformer; (4) acquiring operation current of a switching circuit, performing distribution calculation on the operation current and judging whether switching operation current exceeding an upper limit value exists; (5) analyzing the state of the transformer according to the operation state of the transformer; and (6) judging whether over-load operation of the transformer is feasible according to an analysis result. Compared with the prior art, the method has the advantages of high reliability, capability of effectively solving the problem that whether the transformer in production and scheduling of a power grid is allowed to operate in an over-load state, and the like.
Description
Technical field
The present invention relates to a kind of converting equipment status data disposal route, especially relate to a kind of transformer overload operational feasibility automatic judging method.
Background technology
Along with the development of national economy, the contradiction between the development of some areas power supply capacity and the growth of actual demand day by day manifests.For responding actively this situation, in the network system widespread use raising running temperature, the multinomial technology such as dynamic compatibilization, heat resistance circuit in short-term, greatly improved the ability to transmit electricity of circuit, supporting power transformation station equipment is then generally taked technological transformation with it, namely come to be complementary with the circuit transport capacity by the mode of integral replacing, to satisfy to greatest extent power demands.When obtaining certain effect, a large amount of converting equipments do not reach the time limit and retired in advance designed life, have increased the investment of improvement project newly, have caused the utilization ratio of assets to descend, and move simultaneously the converting equipment transformation and have influence on inevitably power supply reliability.Therefore, be necessary to judge whether the converting equipment running overload is feasible.
Summary of the invention
Purpose of the present invention be exactly provide in order to overcome the defective that above-mentioned prior art exists a kind of reliability high, can effectively solve the transformer overload operational feasibility automatic judging method whether transformer in electrical network production and the scheduling allows the running overload problem.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of transformer overload operational feasibility automatic judging method, described transformer is arranged in the transformer station, also is provided with miniature weather station and SCADA system in the described transformer station, and described transformer is connected with cooling fan, and described method comprises:
1) obtains the weather data of transformer environment of living in, the device parameter of transformer and the running state data of transformer;
2) according to step 1) in the overheated road of the data communication device computation model calculating transformer hot(test)-spot temperature obtained;
3) carry out respectively precooling analysis, overload analysis and the analysis of heat transmission of transformer according to hot-spot temperature of transformer;
4) obtain the running current of switching circuit, and this running current is distributed accounting, and judge whether to exist the switch running current above higher limit;
5) according to the running state data of transformer the state of transformer is analyzed;
6) judge according to above-mentioned analysis result whether the transformer overload operation is feasible.
Described weather data is provided by miniature weather station.
The precooling of described transformer is analyzed specifically: judge whether hot-spot temperature of transformer surpasses preset value in the certain hour, if then output need increase the group number of the cooling fan of transformer, if not, then keeps former running status.
Described certain hour is 900 minutes.
Described overload is analyzed specifically: according to the hot(test)-spot temperature value under certain load factor and the relation between preset value, analyze the capability of overload of transformer.
Described certain load factor comprises that transformer operation can bear maximum load rate or 1.5 times of nominal load rates.
Described analysis of heat transmission is specifically: with the actual thermal resistance of certain frequency calculating transformer, and calculate this actual thermal resistance with respect to the rate of change of specified thermal resistance, analyze the cooling effectiveness of cooling fan according to rate of change, the operation of current cooling fan is diagnosed.
Described certain frequency be 12 hours once.
The running current of described switching circuit obtains from the SCADA system.
Compared with prior art, the present invention passes through running state of transformer data and environment weather data acquisition, transformer is carried out the analyses such as precooling, overload and heat radiation, and the switch running current that is connected with transformer analyzed, whether thereby automatic decision goes out transformer allows running overload, has high reliability.
Description of drawings
Fig. 1 is the schematic flow sheet of the inventive method.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
Embodiment
As shown in Figure 1, a kind of transformer overload operational feasibility automatic judging method, described transformer is arranged in the transformer station, also is provided with miniature weather station and SCADA system in the described transformer station, described transformer is connected with cooling fan, and described method may further comprise the steps:
1) obtain the weather data of transformer environment of living in, the device parameter of transformer and the running state data of transformer, described weather data is provided by miniature weather station, and the running state data of described transformer comprises top-oil temperature and load current;
2) according to step 1) in the overheated road of the data communication device computation model calculating transformer hot(test)-spot temperature obtained;
3) carry out respectively precooling analysis, overload analysis and the analysis of heat transmission of transformer according to hot-spot temperature of transformer:
The precooling of described transformer is analyzed specifically: judge whether hot-spot temperature of transformer surpasses preset value in 900 minutes, if then output needs the group number of the cooling fan of increase transformer, if not, then keeps former running status;
Described overload is analyzed specifically: according to the hot(test)-spot temperature value under certain load factor and the relation between preset value, analyze the capability of overload of transformer, certain load factor comprises that the transformer operation can bear maximum load rate or 1.5 times of nominal load rates;
Described analysis of heat transmission is specifically: with the actual thermal resistance of 12 hours frequency computation part transformers once, and calculate this actual thermal resistance with respect to the rate of change of specified thermal resistance, according to the cooling effectiveness of rate of change analysis cooling fan, the operation of current cooling fan is diagnosed;
4) obtain the running current of switching circuit, and this running current is distributed accounting, and judge whether to exist the switch running current above higher limit, the running current of described switching circuit obtains from the SCADA system;
5) according to the running state data of transformer the state of transformer is analyzed;
6) judge according to above-mentioned analysis result whether the transformer overload operation is feasible, and judge the hazard level of transformer overload operation.
The automatic decision of transformer overload operational feasibility must the real-time judge overload before and after the switching current that is associated of transformer whether surpass the upper bound current value of the permission of switch.Because Divergent line is interrelated, therefore, article one, when the power of circuit changes, need to again mate calculating to all switching currents that is associated, calculate the current value of each switch according to the switching current apportion model after simplifying, if surpassing higher limit, the current value of certain switch thinks that then switching circuit can't satisfy the transformer overload operation, as not surpassing the limits value of switch running current, then allows the overload implementation of strategies.
Claims (9)
1. transformer overload operational feasibility automatic judging method, described transformer is arranged in the transformer station, also is provided with miniature weather station and SCADA system in the described transformer station, and described transformer is connected with cooling fan, it is characterized in that described method comprises:
1) obtains the weather data of transformer environment of living in, the device parameter of transformer and the running state data of transformer;
2) according to step 1) in the overheated road of the data communication device computation model calculating transformer hot(test)-spot temperature obtained;
3) carry out respectively precooling analysis, overload analysis and the analysis of heat transmission of transformer according to hot-spot temperature of transformer;
4) obtain the running current of switching circuit, and this running current is distributed accounting, and judge whether to exist the switch running current above higher limit;
5) according to the running state data of transformer the state of transformer is analyzed;
6) judge according to above-mentioned analysis result whether the transformer overload operation is feasible.
2. a kind of transformer overload operational feasibility automatic judging method according to claim 1 is characterized in that described weather data is provided by miniature weather station.
3. a kind of transformer overload operational feasibility automatic judging method according to claim 1, it is characterized in that, the precooling of described transformer is analyzed specifically: judge whether hot-spot temperature of transformer surpasses preset value in the certain hour, if, then output needs the group number of the cooling fan of increase transformer, if not, then keep former running status.
4. a kind of transformer overload operational feasibility automatic judging method according to claim 3 is characterized in that described certain hour is 900 minutes.
5. a kind of transformer overload operational feasibility automatic judging method according to claim 1, it is characterized in that, described overload is analyzed specifically: according to the hot(test)-spot temperature value under certain load factor and the relation between preset value, analyze the capability of overload of transformer.
6. a kind of transformer overload operational feasibility automatic judging method according to claim 5 is characterized in that, described certain load factor comprises that transformer operation can bear maximum load rate or 1.5 times of nominal load rates.
7. a kind of transformer overload operational feasibility automatic judging method according to claim 1, it is characterized in that, described analysis of heat transmission is specifically: with the actual thermal resistance of certain frequency calculating transformer, and calculate this actual thermal resistance with respect to the rate of change of specified thermal resistance, according to the cooling effectiveness of rate of change analysis cooling fan, the operation of current cooling fan is diagnosed.
8. a kind of transformer overload operational feasibility automatic judging method according to claim 7 is characterized in that, described certain frequency be 12 hours once.
9. a kind of transformer overload operational feasibility automatic judging method according to claim 1 is characterized in that the running current of described switching circuit obtains from the SCADA system.
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| CN201210410842.5A CN102879696B (en) | 2012-10-24 | 2012-10-24 | Automatic judgment method for over-load operational feasibility of transformer |
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| CN201210410842.5A CN102879696B (en) | 2012-10-24 | 2012-10-24 | Automatic judgment method for over-load operational feasibility of transformer |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245857A (en) * | 2013-04-23 | 2013-08-14 | 浙江大学 | Assessment method for loadable index of oil immersed power transformer |
| CN103324215A (en) * | 2013-05-17 | 2013-09-25 | 郑州华力信息技术有限公司 | Method for setting up thermal circuit model used for transformer load intelligent management system |
| CN103543352A (en) * | 2013-09-25 | 2014-01-29 | 国家电网公司 | Method for determining dynamic overload curves of transformers based on operating data |
| WO2014135015A1 (en) * | 2013-03-07 | 2014-09-12 | 国网安徽省电力公司芜湖供电公司 | Network for online monitoring of power transformer at intelligent substation |
| CN105353233A (en) * | 2015-09-30 | 2016-02-24 | 南京南瑞继保电气有限公司 | Method and device of on-line operation capability detection of transformer |
| CN107246925A (en) * | 2017-05-27 | 2017-10-13 | 上海海能信息科技有限公司 | A kind of current transformer thermal circuit model analysis method |
| CN108680801A (en) * | 2018-03-23 | 2018-10-19 | 国网河北省电力有限公司电力科学研究院 | A kind of transformer overload computational methods, system and terminal device |
| CN112615371A (en) * | 2020-12-18 | 2021-04-06 | 浙江大学 | Asset optimal configuration method for improving utilization efficiency of distribution transformer |
| CN113390461A (en) * | 2021-06-04 | 2021-09-14 | 广西电网有限责任公司北海供电局 | Transformer dynamic capacity increasing system based on transformer monitoring |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014135015A1 (en) * | 2013-03-07 | 2014-09-12 | 国网安徽省电力公司芜湖供电公司 | Network for online monitoring of power transformer at intelligent substation |
| CN103245857A (en) * | 2013-04-23 | 2013-08-14 | 浙江大学 | Assessment method for loadable index of oil immersed power transformer |
| CN103245857B (en) * | 2013-04-23 | 2015-06-03 | 浙江大学 | Assessment method for loadable index of oil immersed power transformer |
| CN103324215A (en) * | 2013-05-17 | 2013-09-25 | 郑州华力信息技术有限公司 | Method for setting up thermal circuit model used for transformer load intelligent management system |
| CN103324215B (en) * | 2013-05-17 | 2016-08-03 | 国网河南省电力公司郑州供电公司 | The method to set up of Intelligent load management system for transformer thermal circuit model |
| CN103543352B (en) * | 2013-09-25 | 2016-05-18 | 国家电网公司 | Determine the method for the dynamic overload curve of transformer based on service data |
| CN103543352A (en) * | 2013-09-25 | 2014-01-29 | 国家电网公司 | Method for determining dynamic overload curves of transformers based on operating data |
| CN105353233A (en) * | 2015-09-30 | 2016-02-24 | 南京南瑞继保电气有限公司 | Method and device of on-line operation capability detection of transformer |
| CN105353233B (en) * | 2015-09-30 | 2018-03-13 | 南京南瑞继保电气有限公司 | A kind of transformer on-line operation ability detection method and device |
| CN107246925A (en) * | 2017-05-27 | 2017-10-13 | 上海海能信息科技有限公司 | A kind of current transformer thermal circuit model analysis method |
| CN108680801A (en) * | 2018-03-23 | 2018-10-19 | 国网河北省电力有限公司电力科学研究院 | A kind of transformer overload computational methods, system and terminal device |
| CN112615371A (en) * | 2020-12-18 | 2021-04-06 | 浙江大学 | Asset optimal configuration method for improving utilization efficiency of distribution transformer |
| CN112615371B (en) * | 2020-12-18 | 2021-10-08 | 浙江大学 | Asset optimal configuration method for improving utilization efficiency of distribution transformer |
| CN113390461A (en) * | 2021-06-04 | 2021-09-14 | 广西电网有限责任公司北海供电局 | Transformer dynamic capacity increasing system based on transformer monitoring |
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| CN102879696B (en) | 2015-04-15 |
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