CN101860313B - Self-excited synchronous generator alternating current excitation initiating circuit - Google Patents
Self-excited synchronous generator alternating current excitation initiating circuit Download PDFInfo
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- CN101860313B CN101860313B CN 201010185169 CN201010185169A CN101860313B CN 101860313 B CN101860313 B CN 101860313B CN 201010185169 CN201010185169 CN 201010185169 CN 201010185169 A CN201010185169 A CN 201010185169A CN 101860313 B CN101860313 B CN 101860313B
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Abstract
The invention relates to a self-excited synchronous generator alternating current excitation initiating circuit, which comprises a diode rectifier bridge excitation initiating circuit with an alternating current lateral contactor and is connected with the two ends of a rotor of a generator in parallel. The self-excited synchronous generator alternating current excitation initiating circuit is characterized in that the diode rectifier bridge output side of the excitation initiating circuit is connected with a resistor in parallel. In the invention, when the generator starts and builds up a voltage, a resistor connected with the diode rectifier bridge output side of the excitation initiating circuit in parallel is connected to the excitation initiating circuit to produce an afterflow in the diode, the resistor, at the same time, serves as a load of a silicon controlled rectifier of an excitation rectifier device in an excitation initiating process to allow the output currents of both a silicon controlled element and a diode element in the excitation rectifier device to surpass a maintenance current and a latching current, and thus, the continuous conduction of the silicon controlled rectifier in an excitation initiating process is ensured and the reliable excitation initiation of the generator is realized; and when the excitation initiation of the generator is finished, the afterflow resistor and the excitation initiating circuit stop operating under the control of a regulator, so the safety of the excitation initiating circuit is ensured.
Description
Technical field
The present invention relates to a kind of self-excited synchronous generator alternating current excitation initiating circuit.
Background technology
The again start of synchronous generator is very frequently, for example after synchronous generator operation a period of time, shut down maintenance, the safety of generator unit when guaranteeing long-play; Because electric load has different demands in Various Seasonal, when load reduced, electrical network also can require part generator unit off-the-line; Hydraulic generator is a kind of of synchronous generator, is bearing frequency modulation, Peak Load Adjustment, and it is more frequent that it opens, shuts down number of times.When adopting self-excited synchronous generator, when the generator unit is started shooting generating again, at first to carry out excitation and build pressure, as seen, reliable, the quick excitation of generator has very important meaning for the again start of generator.
Because the advantage of static excitation mode, the high-rating generator unit mostly adopts self-excitation type static excitation mode, because needed power supply capacity is larger during excitation, therefore the general mode that adopts alternating current excitation initiating when carrying out generator excitation system, to reduce power supply capacity, being convenient to the power plant provides the excitation power supply.The alternating current excitation initiating mode adopts diode rectifier bridge that AC power is rectified into and offers generator amature after the DC power supply and set up initial magnetic field.For the larger generator of its inductor rotor, its larger inductor rotor may have influence on excitation system rectifying device thyristor operating state in the excitation process, cause namely that thyristor can not continue conducting in the excitation process, make generator terminal voltage excessively low, so that after the end of excitation process, set end voltage is excessively low, greatly reduces the speed of excitation or so that field regulator can't trigger the controllable silicon of rectifying device, causes the most at last generator excitation failure.
Summary of the invention
The purpose of this invention is to provide a kind of reliable, quick and safe self-excited synchronous generator alternating current excitation initiating circuit.
For solving the problems of the technologies described above, the present invention takes following technical scheme: a kind of self-excited synchronous generator alternating current excitation initiating circuit, comprise the diode rectifier bridge excitation initiating circuit with AC contactor, described excitation initiating circuit is connected in parallel on described generator amature two ends, it is characterized in that the diode rectifier bridge outlet side of described excitation initiating circuit resistance in parallel.
Preferably, the Standard resistance range of described resistance is 50 Ω～500 Ω.
Preferably, described resistance two ends are connected to described generator amature two ends behind series direct current side contactor and the fast acting fuse respectively.
When the present invention built pressure in the generator start, the resistance access excitation initiating circuit of the diode rectifier bridge outlet side parallel connection of excitation initiating circuit made rectifying device thyristor afterflow conducting, realizes reliable excitation; After the generator excitation was finished, resistance and excitation initiating circuit were out of service, guaranteed the safety of excitation initiating circuit.
Description of drawings
Fig. 1 is a kind of self-excited synchronous generator alternating current excitation initiating circuit electrical schematic diagram of the present invention.
Embodiment
The present invention is further detailed explanation below in conjunction with description of drawings and embodiment.
Referring to Fig. 1, a kind of self-excited synchronous generator alternating current excitation initiating circuit, comprise the diode rectifier bridge excitation initiating circuit with AC contactor K11, this excitation initiating circuit is connected in parallel on the generator amature two ends, its diode rectifier bridge outlet side resistance R 0 in parallel, these resistance R 0 two ends are series direct current side contactor K12 respectively, in order to prevent the excitation initiating circuit dc-side short-circuit, produce large electric current and damage the safety of excitation initiating circuit thyristor or excitation transformer, even the safety that jeopardizes station service and generator unit, series connection fuse F1 behind DC side contactor K12, behind the F2 excitation initiating circuit is connected to the two ends of generator amature
The excitation system that self-excited synchronous generator adopts comprises field regulator, excitation rectifier device, de-excitation system, excitation initiating circuit and instrument etc.Generator is started shooting and is built when pressing, after the excitation system of generator receives that the pressure signal is built in start, field regulator sends action command to AC contactor K11, with resistance R 0 access excitation initiating circuit, make diode rectifier bridge be in conducting rectification operating state, by AC contactor K11 control DC side contactor K12, diode rectifier bridge is accessed the excitation that Generator's Rotor Circuit is carried out generator again, the required exciting voltage of generator amature excitation and field power supply are provided; Wherein resistance R 0 has played the effect of afterflow, also can be known as continued flow resistance.After the generator excitation is finished, field regulator detects and withdraws from the excitation initiating circuit signal, namely send AC contactor K11 release signal, cut off the electricity supply, then discharge DC side contactor K12 by AC contactor K11, finish separating of diode rectifier bridge excitation initiating circuit and generator amature, guarantee the safety of excitation initiating circuit components and parts.
Embodiment 1: the generator excitation initiating circuit design of Shenhua state China Suizhong 1000MW unit: adopt thermoelectric generator, wherein the excitation transformer voltage ratio is: 380V:15V, resistance is: 200 Ω/300W.
Embodiment 2: the generator excitation initiating circuit design of underground power station, Three Gorges 700MW unit: adopt hydraulic generator, the excitation transformer voltage ratio is: 380V: 20V, resistance is: 50 Ω/1000W.
Those skilled in the art will recognize that, above-mentioned embodiment is exemplary, in order better to make those skilled in the art can understand this patent, can not be interpreted as it is the restriction that this patent is comprised scope, anyly be equal to change or modify so long as the spirit that discloses according to this patent is done, all fall into the scope that this patent comprises.
Claims (2)
1. self-excited synchronous generator alternating current excitation initiating circuit, comprise the diode rectifier bridge excitation initiating circuit with AC contactor, described excitation initiating circuit is connected in parallel on described generator amature two ends, it is characterized in that, the diode rectifier bridge outlet side of described excitation initiating circuit resistance in parallel, described resistance two ends are connected to described generator amature two ends behind series direct current side contactor and the fast acting fuse respectively.
2. self-excited synchronous generator alternating current excitation initiating circuit according to claim 1 is characterized in that, the Standard resistance range of described resistance is 50 Ω～500 Ω.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010185169 CN101860313B (en) | 2010-05-27 | 2010-05-27 | Self-excited synchronous generator alternating current excitation initiating circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010185169 CN101860313B (en) | 2010-05-27 | 2010-05-27 | Self-excited synchronous generator alternating current excitation initiating circuit |
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| CN101860313A CN101860313A (en) | 2010-10-13 |
| CN101860313B true CN101860313B (en) | 2013-04-10 |
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| CN 201010185169 Active CN101860313B (en) | 2010-05-27 | 2010-05-27 | Self-excited synchronous generator alternating current excitation initiating circuit |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102064757B (en) * | 2010-12-24 | 2012-11-07 | 中国长江三峡集团公司 | Generator accident reinforced excitation circuit |
| CN102340276B (en) * | 2011-08-18 | 2013-10-09 | 国电南瑞科技股份有限公司 | Exciting method of flexible electric braking exciting loop of self-exciting hydraulic generator |
| CN104883104A (en) * | 2015-06-02 | 2015-09-02 | 国电南瑞科技股份有限公司 | Multifunctional resistance circuit with small current test and residual voltage excitation freewheeling functions |
| CN105607565B (en) * | 2015-12-17 | 2018-06-15 | 国家电网公司 | Excitation system logic control method in a kind of pumped storage machine Back To Back Startup Procedure |
| CN105471344B (en) * | 2015-12-25 | 2018-02-13 | 国电南瑞科技股份有限公司 | Excitation design method based on excitation rotor loop time constant |
| CN105763113B (en) * | 2016-04-01 | 2018-07-17 | 钛能科技股份有限公司 | A kind of low pressure Hydropower Unit exempts from excitation dual power supply adjustment of field excitation circuit |
| CN114629400B (en) * | 2022-03-22 | 2023-03-24 | 三峡智控科技有限公司 | Control method for establishing initial anode voltage in excitation starting process |
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| CN2053810U (en) * | 1989-03-23 | 1990-02-28 | 汤呜招 | Magnetism, erasing device |
| CN2378866Y (en) * | 1999-05-29 | 2000-05-17 | 王川 | Rotor de-excitation apparatus for synchronous dynamo-electric generator |
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| CN1581675A (en) * | 2004-05-14 | 2005-02-16 | 国电自动化研究院 | Generator controlled follow-current type de-excitation circuit |
| CN2741249Y (en) * | 2004-05-14 | 2005-11-16 | 国电自动化研究院 | Controllable current following de-excitation circuit of generator |
| RU2282925C1 (en) * | 2005-04-19 | 2006-08-27 | Государственное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" | Method and device for suppressing magnetic field of excitation winding of synchronous machine (variants) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH077977A (en) * | 1993-06-17 | 1995-01-10 | Ishikawajima Harima Heavy Ind Co Ltd | Motor overload protector |
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2010
- 2010-05-27 CN CN 201010185169 patent/CN101860313B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2053810U (en) * | 1989-03-23 | 1990-02-28 | 汤呜招 | Magnetism, erasing device |
| CN2378866Y (en) * | 1999-05-29 | 2000-05-17 | 王川 | Rotor de-excitation apparatus for synchronous dynamo-electric generator |
| CN2588638Y (en) * | 2002-07-18 | 2003-11-26 | 科大创新股份有限公司科聚分公司 | Electronic coverting energy-switching magnet-eliminating protector for generator |
| CN1581675A (en) * | 2004-05-14 | 2005-02-16 | 国电自动化研究院 | Generator controlled follow-current type de-excitation circuit |
| CN2741249Y (en) * | 2004-05-14 | 2005-11-16 | 国电自动化研究院 | Controllable current following de-excitation circuit of generator |
| RU2282925C1 (en) * | 2005-04-19 | 2006-08-27 | Государственное образовательное учреждение высшего профессионального образования "Южно-Уральский государственный университет" | Method and device for suppressing magnetic field of excitation winding of synchronous machine (variants) |
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| CN101860313A (en) | 2010-10-13 |
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Owner name: NARI NANJING CONTROL SYSTEM LTD. Effective date: 20141205 |
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Effective date of registration: 20141205 Address after: High road high tech Development Zone Nanjing city Jiangsu province 210061 No. 20 Patentee after: NARI Technology Development Co., Ltd. Patentee after: SGCC NARI Nanjing Control System Co., Ltd. Address before: High road high tech Development Zone Nanjing city Jiangsu province 210061 No. 20 Patentee before: NARI Technology Development Co., Ltd. |