CN107622176A - The verification method of stator overload protection and exciting current limitation matching relationship - Google Patents
The verification method of stator overload protection and exciting current limitation matching relationship Download PDFInfo
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- CN107622176A CN107622176A CN201711064931.8A CN201711064931A CN107622176A CN 107622176 A CN107622176 A CN 107622176A CN 201711064931 A CN201711064931 A CN 201711064931A CN 107622176 A CN107622176 A CN 107622176A
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Abstract
The present invention provides the verification method of stator overload protection and exciting current limitation matching relationship, it is characterised in that comprises the following steps：S1：Stator overload protection actuation time is tested, and the load stator current of multiple is added with protective calibration instrument, is then carried out operating time of protection under different stator currents and is tested；S2：The theoretical action protection time under different stator currents is calculated according to inverse time-lag protection equation；S3：Calculate exciting current theory of control actuation time；S4：Exciting current limitation actuation time is tested, changes sample rate current size, protection tester test exciting current limiter actuation time；S5：Draw electric current and stator overload protection and the curve map of exciting current limitation actuation time; verify stator current overload protection and exciting current limitation matching relationship; it not only can verify that existing system matching relationship; also the adjustment for generating set system provides basis, has ensured generating set safe and reliable operation.
Description
Technical field
The invention belongs to thermal power plant's safe operation technical field, and in particular to stator overload protection limits with exciting current
The verification method of matching relationship.
Background technology
As whole power network Large-scale machine set is more and more, Generator Set has become the main machine of network system
Type, for prevent due to generator ＆ transformer action and excitation system because parameter setting is improper and may caused by unit trip, make
Fluctuated into system active and reactive power, system concussion or even step-out may be caused under serious situation, even causes whole electric power
The major accidents such as system break-down, so necessary related protection definite value and excitation system restrictive curve in G-T protective
Between setting value order relation verified, to improve the security reliability of whole power system.
The content of the invention
To improve the security reliability of whole power system, the present invention provides stator overload protection and limited with exciting current
The verification method of matching relationship.
The technical scheme is that：The verification method of stator overload protection and exciting current limitation matching relationship, bag
Include following steps：
S1：Stator overload protection actuation time is tested, and the load stator current of multiple is added with protective calibration instrument, is then carried out
Operating time of protection is tested under different stator currents；
S2：Stator overload protection action theoretical time is calculated, is calculated according to inverse time-lag protection equation under different stator currents
Theoretical action protection time, inverse time-lag protection equation are：, wherein KSzd:Generator is sent out
Thermal time constant, Ksrzd：Generator heat-radiation effect coefficient, Iezd：The sub-value of the rated current of generator two；
S3：Exciting current theory of control actuation time is calculated, stator current limiter relevant parameter is configured, electric current is entered
Row sampling, according to formulaCalculating current theory of control actuation time, whereinFor stator current perunit value；
For stator current longtime running value, 1 is defaulted as；A is defaulted as 2；A is inverse time lag constant；
S4：Exciting current limitation actuation time is tested, changes sample rate current size, protection tester test exciting current limiter
Actuation time；
S5：Electric current and stator overload protection and the curve map of exciting current limitation actuation time are drawn, verifies stator current mistake
Load is protected and exciting current limitation matching relationship.
Further, each size of current is consistent in step S1-S4 for scheme.
Further, KSzd takes 37.5, Ksrzd to take 1.02~1.05 to scheme in step S1.
Further, Ksrzd takes 1.05 to scheme.
Further, A is inverse time lag constant to scheme in step S3, value 33.
The verification method of the stator overload protection of the present invention and exciting current limitation matching relationship, not only can verify that existing
System matching relationship, the also adjustment for generating set system provide basis, have ensured generating set safe and reliable operation.
Brief description of the drawings
Fig. 1 is steps flow chart block diagram of the present invention.
Fig. 2 is stator current overload protection actuation time data result.
Fig. 3 is exciting current limitation actuation time data result.
Fig. 4 is stator overload protection and exciting current limitation matching relationship curve.
Embodiment
Clearly complete description is done to the present invention below in conjunction with the accompanying drawings, so that those skilled in the art need not make
Under conditions of creative work, it can fully implement the present invention.
Embodiment：As shown in figure 1, the authentication of stator overload protection and exciting current limitation matching relationship
Method, comprise the following steps：
S1（1）：Stator overload protection actuation time tests, and the load stator current of multiple is added with protective calibration instrument, then
Operating time of protection under different stator currents is carried out to test；
S2（2）：Stator overload protection action theoretical time is calculated, is calculated according to inverse time-lag protection equation under different stator currents
The theoretical action protection time, inverse time-lag protection equation is：, wherein KSzd:Generator
Heating time constant takes 37.5, Ksrzd：Generator heat-radiation effect coefficient takes 1.02~1.05, and 1.05 are taken in the present embodiment,
Iezd：The sub-value of the rated current of generator two；
S3（3）：Exciting current theory of control actuation time is calculated, stator current limiter relevant parameter is configured, to electricity
Stream is sampled, according to formulaCalculating current theory of control actuation time, whereinFor stator current perunit
Value；For stator current longtime running value, 1 is defaulted as；A is defaulted as 2；A is inverse time lag constant, value 33；
S4（4）：Exciting current limitation actuation time is tested, changes sample rate current size, protection tester test exciting current limit
Device actuation time processed；
S5（5）：Electric current and stator overload protection and the curve map of exciting current limitation actuation time are drawn, verifies stator current
Overload protection and exciting current limitation matching relationship.
Preferably, each size of current is consistent in step S1-S4.
The stator current overload protection actuation time data result obtained according to step S1 and S2 is as shown in Figure 2.
The exciting current limitation actuation time data result obtained according to step S3 and S4 is as shown in Figure 3.
According to step S5 stator overload protection and exciting current the limitation matching relationship curves drawn as shown in figure 4, from
The limitation of field regulator is can be seen that in figure to be acted prior to G-T protective, G-T protective action full cut-off when limitation is failed,
Therebetween there is good matching relationship, the wherein experimental record time and theoretical calculation time is basically identical, not quite identical
Reason is the deviation and recording error of added electric current, and existing system is safe and reliable.
Presently preferred embodiments of the present invention is described above, it should be pointed out that the invention is not limited in above-mentioned
Particular implementation, wherein the equipment and structure be not described in detail to the greatest extent are construed as giving reality with the common mode in this area
Apply；Any those skilled in the art, without departing from the scope of the technical proposal of the invention, the technology according to the present invention
Essence still falls within technical solution of the present invention protection to any simple modifications, equivalents, and modifications made for any of the above embodiments
In the range of.
Claims (5)
1. the verification method of stator overload protection and exciting current limitation matching relationship, it is characterised in that comprise the following steps：
S1：Stator overload protection actuation time is tested, and the load stator current of multiple is added with protective calibration instrument, is then carried out
Operating time of protection is tested under different stator currents；
S2：Stator overload protection action theoretical time is calculated, is calculated according to inverse time-lag protection equation under different stator currents
Theoretical action protection time, inverse time-lag protection equation are：, wherein KSzd:Generator is sent out
Thermal time constant, Ksrzd：Generator heat-radiation effect coefficient, Iezd：The sub-value of the rated current of generator two；
S3：Exciting current theory of control actuation time is calculated, stator current limiter relevant parameter is configured, electric current is entered
Row sampling, according to formulaCalculating current theory of control actuation time, whereinFor stator current perunit value；For stator current longtime running value, 1 is defaulted as；A is defaulted as 2；A is inverse time lag constant；
S4：Exciting current limitation actuation time is tested, changes sample rate current size, protection tester test exciting current limiter
Actuation time；
S5：Electric current and stator overload protection and the curve map of exciting current limitation actuation time are drawn, verifies stator current mistake
Load is protected and exciting current limitation matching relationship.
2. the verification method of stator overload protection according to claim 1 and exciting current limitation matching relationship, it is special
Sign is that each size of current is consistent in step S1-S4.
3. the verification method of stator overload protection according to claim 2 and exciting current limitation matching relationship, it is special
Sign is that KSzd takes 37.5, Ksrzd to take 1.02~1.05 in step S1.
4. the verification method of stator overload protection according to claim 3 and exciting current limitation matching relationship, it is special
Sign is, Ksrzd takes 1.05.
5. the verification method of stator overload protection according to claim 4 and exciting current limitation matching relationship, it is special
Sign is, A is inverse time lag constant in step S3, value 33.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711064931.8A CN107622176A (en) | 2017-11-02 | 2017-11-02 | The verification method of stator overload protection and exciting current limitation matching relationship |
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| CN201711064931.8A CN107622176A (en) | 2017-11-02 | 2017-11-02 | The verification method of stator overload protection and exciting current limitation matching relationship |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383026A (en) * | 2020-11-05 | 2021-02-19 | 山西垣曲抽水蓄能有限公司 | Checking method, device, medium and electronic equipment for protecting coordination relationship |
| CN112952784A (en) * | 2021-02-24 | 2021-06-11 | 国网浙江省电力有限公司电力科学研究院 | Excitation becomes overload limiter suitable for flexible excitation system |
| CN113376521A (en) * | 2021-06-18 | 2021-09-10 | 四川华能宝兴河水电有限责任公司 | Generator protection and excitation system matching checking method |
| CN112952784B (en) * | 2021-02-24 | 2024-05-10 | 国网浙江省电力有限公司电力科学研究院 | Excitation variable overload limiter applicable to flexible excitation system |
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| DE2015407B2 (en) * | 1970-04-01 | 1975-05-15 | Paul 8000 Muenchen Haisenko | Current dependent stabilised voltage supply - has output current limited to preset threshold to provide overload protection, by transistor addition to standard circuit |
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| CN106160607A (en) * | 2016-05-20 | 2016-11-23 | 中国大唐集团科学技术研究院有限公司华东分公司 | The implementation method that a kind of field regulator stator overcurrent limits |
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| DE2015407B2 (en) * | 1970-04-01 | 1975-05-15 | Paul 8000 Muenchen Haisenko | Current dependent stabilised voltage supply - has output current limited to preset threshold to provide overload protection, by transistor addition to standard circuit |
| CN103606889A (en) * | 2013-11-26 | 2014-02-26 | 四川西南不锈钢有限责任公司 | Secondary side overcurrent protection circuit of electric arc furnace transformer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383026A (en) * | 2020-11-05 | 2021-02-19 | 山西垣曲抽水蓄能有限公司 | Checking method, device, medium and electronic equipment for protecting coordination relationship |
| CN112383026B (en) * | 2020-11-05 | 2022-10-11 | 山西垣曲抽水蓄能有限公司 | Checking method, device, medium and electronic equipment for protecting coordination relationship |
| CN112952784A (en) * | 2021-02-24 | 2021-06-11 | 国网浙江省电力有限公司电力科学研究院 | Excitation becomes overload limiter suitable for flexible excitation system |
| CN112952784B (en) * | 2021-02-24 | 2024-05-10 | 国网浙江省电力有限公司电力科学研究院 | Excitation variable overload limiter applicable to flexible excitation system |
| CN113376521A (en) * | 2021-06-18 | 2021-09-10 | 四川华能宝兴河水电有限责任公司 | Generator protection and excitation system matching checking method |
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Application publication date: 20180123 |