CN103321826A - Hydraulic generator overspeed protection device and control method thereof - Google Patents
Hydraulic generator overspeed protection device and control method thereof Download PDFInfo
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- CN103321826A CN103321826A CN2013102765925A CN201310276592A CN103321826A CN 103321826 A CN103321826 A CN 103321826A CN 2013102765925 A CN2013102765925 A CN 2013102765925A CN 201310276592 A CN201310276592 A CN 201310276592A CN 103321826 A CN103321826 A CN 103321826A
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- overrunning
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The invention discloses a hydraulic generator overspeed protection device and a control method thereof. The hydraulic generator overspeed protection device comprises n rotational speed measuring instruments, an overpspeed detecting device and an overspeed executing device which are mounted on a hydraulic generator, the n rotational speed measuring instruments are connected with the overpspeed detecting device which is connected with the overspeed executing device, the overpspeed detecting device receives detection signals of the n rotational speed measuring instruments and outputs overspeed signals to the overspeed executing device so as to adjusting the rotational speed of the hydraulic generator when m rotational speed measuring instruments detect that the hydraulic generator is overspeed in rotation, n is a positive integer greater than 2, and m is a positive integer greater than 2 and less than n. The overspeed executing device is prevented from moving singly according to whether the rotational speed of a unit is greater than 115%XNe, and maloperation or miss operation of overspeed protection caused by rotational speed signal abnormalities is avoided. Meanwhile, main distribution miss-operation conditions are set so as to avoid maloperation of overspeed protection due to incorrect main distribution miss-operation signals.
Description
Technical field
The present invention relates to a kind of hydraulic turbine generator protective circuit, particularly relate to a kind of hydraulic turbine generator overspeed protection circuit and controlling method thereof.
Background technique
In the hydraulic generator unit control system, the overspeed protection system is mainly used in preventing that as the important component part of unit control system the extensive damage that the anecdote event causes unit from appearring flying in unit.When accidental shutdown or removal of load appear in unit, if the tripping of speed regulator fault or stator closing velocity are crossed the situation that waits slowly, just need to open the direct guide vane closing of emergency distributing valve.Both at home and abroad the major accident of overrunning, flying to escape and cause because of unit once repeatedly appearred in the water power plant, therefore, improved the reliability of Hydropower Unit overspeed protection system, had great importance.
At present; the hydroelectric power plant all disposes the technology that starts overspeed protection when generating unit speed surpasses 115%*Ne (Ne is the unit rated speed); be specially protective system action when generating unit speed surpasses 115%*Ne, cross at the tripping of fast device fault or stator closing velocity simultaneously that the master joins the action of tripping contact when slow.Because the hydroelectric power plant all adopts single speed detector detection generating unit speed, the tach signal that detects according to a speed detector judges whether the needs shutdown, and single tach signal is in case occur will causing overspeed protection malfunction or tripping unusually.Simultaneously, the water power factory owner joins the tripping contact and adopts main control valve position switch signal, main control valve during in the neutral position or to evolution to motion the master join the action of tripping position switch.And in fact when getting rid of 100% load; when generating unit speed rises to peak; rotating speed is from the process that peak descends then; rotating speed still experiences the speed point greater than 115%*Ne; and this moment main control valve just in time toward evolution to motion, stator just from zero aperture toward no-load opening increase process, the master joined the tripping position switch and just in time moved this moment; and be actually speed regulator normal regulating process this time, and this moment, overspeed protection should not move.
Summary of the invention
The present invention is intended to solve at least the technical problem that exists in the prior art; a kind of hydraulic turbine generator overspeed protection circuit and controlling method thereof have been proposed to special innovation; the present invention can avoid avoiding tach signal to cause overspeed protection malfunction or tripping unusually because of single whether moving greater than 115%*Ne according to generating unit speed.Can avoid simultaneously main control valve tripping signal incorrect and cause the overspeed protection malfunction.
In order to realize above-mentioned purpose of the present invention; according to a first aspect of the invention; the invention provides a kind of hydraulic turbine generator overspeed protection circuit; it comprises the n platform tachometer of measuring that is installed on the hydraulic turbine generator; overspeed detection device and the actuating device of overrunning; described n is the positive integer greater than 2; described n platform tachometer of measuring links to each other with overspeed detection device; described overspeed detection device links to each other with the actuating device of overrunning; described overspeed detection device receives the testing signal of described n platform tachometer of measuring; when m platform tachometer of measuring detects the hydraulic turbine generator over speed of rotation; described overspeed detection device is exported the signal of overrunning to the actuating device of overrunning; the described actuating device of overrunning is regulated the hydraulic turbine generator rotating speed, and described m is greater than 2 and less than the positive integer of n.
Hydraulic turbine generator overspeed protection circuit of the present invention can be avoided avoiding tach signal to cause overspeed protection malfunction or tripping unusually because of single whether moving greater than 115%*Ne according to generating unit speed.
In a preferred embodiment of the present invention, described overspeed detection device is made of n relay, and described n is the positive integer greater than 2; The output terminal of k platform tachometer of measuring links to each other with the input circuit of k relay, described k=1,2 ..., n; In the input circuit and output loop of a described n relay, every m loop is composed in series a branch road, does not contain input circuit and the output loop that is positioned at same relay in described each bar, and described m is greater than 2 and less than the positive integer of n; The two ends of described branch road link to each other with the two ends of the actuating device of overrunning respectively.
In another kind of preferred embodiment of the present invention, described n is 3, described m is 2, the input circuit of the input circuit of described first relay and second relay is composed in series first branch road, the input circuit of the output loop of described first relay and the 3rd relay is composed in series second branch road, the output loop of the output loop of described second relay and the 3rd relay is composed in series the 3rd branch road, and the two ends of the described actuating device of overrunning link to each other with described first branch road, second branch road and the two ends of the 3rd branch road respectively.
Among the present invention when m platform tachometer of measuring detects the hydraulic turbine generator over speed of rotation; overspeed detection device is exported the signal of overrunning to the actuating device of overrunning; regulate the hydraulic turbine generator rotating speed; avoid avoiding tach signal to cause overspeed protection malfunction or tripping unusually because of single whether moving greater than 115%*Ne according to generating unit speed.
In order to realize above-mentioned purpose of the present invention, according to a second aspect of the invention, the invention provides a kind of hydraulic turbine generator overspeed protection method, comprise the steps:
S1, n platform tachometer of measuring detects hydraulic generator unit rotating speed and to the overspeed detection device output signal, when m platform tachometer of measuring detects the hydraulic turbine generator over speed of rotation, described overspeed detection device is exported the signal of overrunning to the actuating device of overrunning, described n is the positive integer greater than 2, and described m is greater than 2 and less than the positive integer of n;
S2, the described actuating device of overrunning judge that whether speed regulator satisfies the main tripping condition of joining, and main when joining the tripping condition when satisfying, the master of described speed regulator joins according to the contact action of moving position, and described master joins according to moving condition is:
The hydraulic turbine generator rotating speed greater than unit rated speed Ne 115% and be in rising edge;
After the unit removal of load, when stator was closed back, it was negative value that the guide vane opening setting value deducts the actual aperture of stator;
The displacement of main control valve physical location and its middle position is negative value.
Hydraulic turbine generator overspeed protection method of the present invention is when m platform tachometer of measuring detects the hydraulic turbine generator over speed of rotation; overspeed detection device is to the actuating device output speed-regulating signal of overrunning; regulate the hydraulic turbine generator rotating speed; avoid avoiding tach signal to cause overspeed protection malfunction or tripping unusually because of single whether moving greater than 115%*Ne according to generating unit speed.Simultaneously, by setting up main joining according to moving condition, avoid the main tripping signal of joining incorrect and cause the overspeed protection malfunction.
Additional aspect of the present invention and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming embodiment's the description in conjunction with following accompanying drawing, wherein:
Fig. 1 is hydraulic turbine generator overspeed protection circuit diagram in a kind of preferred implementation of the present invention;
Fig. 2 is the connection diagram of overspeed detection device among Fig. 1.
Embodiment
Describe embodiments of the invention below in detail, described embodiment's example is shown in the drawings, and wherein identical or similar label is represented identical or similar elements or the element with identical or similar functions from start to finish.Be exemplary below by the embodiment who is described with reference to the drawings, only be used for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, unless otherwise prescribed and limit, need to prove that term " installation ", " linking to each other ", " connection " should be done broad understanding, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly to link to each other, and also can link to each other indirectly by intermediary, for the ordinary skill in the art, can understand the concrete implication of above-mentioned term as the case may be.
The invention provides a kind of hydraulic turbine generator overspeed protection circuit; it comprises the n platform tachometer of measuring that is installed on the hydraulic turbine generator; overspeed detection device and the actuating device of overrunning; wherein; n is the positive integer greater than 2; described n platform tachometer of measuring links to each other with overspeed detection device; described overspeed detection device links to each other with the actuating device of overrunning; described overspeed detection device receives the testing signal of n platform tachometer of measuring and moves according to the testing result of tachometer of measuring; when m platform tachometer of measuring detects the hydraulic turbine generator over speed of rotation; described overspeed detection device is exported the signal of overrunning to the actuating device of overrunning; the actuating device of overrunning is regulated the hydraulic turbine generator rotating speed, and described m is greater than 2 and less than the positive integer of n.
In the present embodiment, the actuating device of overrunning can be existing any actuating device of overrunning, and after overspeed detection device was overrun signal to the actuating device output of overrunning, the actuating device of overrunning can be regulated the hydraulic turbine generator rotating speed according to method of the prior art.
In one embodiment of the invention, described overspeed detection device is made of n relay, and described n is the positive integer greater than 2;
The output terminal of k platform tachometer of measuring links to each other with the input circuit of k relay, described k=1,2 ..., n;
In the input circuit and output loop of a described n relay, every m loop is composed in series a branch road, does not contain input circuit and the output loop that is positioned at same relay in described each bar, and described m is greater than 2 and less than the positive integer of n;
The two ends of described branch road link to each other with the two ends of the actuating device of overrunning respectively.
In a mode of execution that is more preferably of the present invention, described n is 3, described m is 2, the input circuit of the input circuit of described first relay and second relay is composed in series first branch road, the input circuit of the output loop of described first relay and the 3rd relay is composed in series second branch road, the output loop of the output loop of described second relay and the 3rd relay is composed in series the 3rd branch road, and the two ends of the described actuating device of overrunning link to each other with described first branch road, second branch road and the two ends of the 3rd branch road respectively.
As shown in Figure 1, at hydraulic turbine generator three rotary speed measurer N1 are installed, N2, N3, every a pair of node of overrunning of rotary speed measurer output, three rotary speed measurer N1, N2, N3 is by three relay K A1, KA2, KA3 expands output, concrete annexation as shown in Figure 2, the input circuit of the first relay K A1 (loop that contact KA1-2 and KA1-3 form) is composed in series first branch road with the input circuit (loop that contact KA2-2 and KA2-3 form) of the second relay K A2, the output loop of the first relay K A1 (loop that contact KA1-5 and KA1-6 form) is composed in series second branch road with the input circuit (loop that contact KA3-2 and KA3-3 form) of the 3rd relay K A3, the output loop of the second relay K A2 (loop that contact KA2-5 and KA2-6 form) is composed in series the 3rd branch road with the output loop (loop that contact KA3-5 and KA3-6 form) of the 3rd relay K A3, the two ends of the actuating device of overrunning respectively with described first branch road, second branch road links to each other with the two ends of the 3rd branch road.
The present invention detects the loop by building " three the select two " node of overrunning; 3 switching value signals that participate in " three select two " are just independent separately from the sampling end; independently sample point and sampler are namely respectively arranged; handle by " three select two " loop; when only having 1 signal to make a mistake; it just can in time be rejected in " three select two " loop, improves the reliability in overspeed protection loop, has reduced the risk of overspeed protection malfunction and tripping.
The present invention also provides a kind of hydraulic turbine generator overspeed protection method, comprises the steps:
S1, n platform tachometer of measuring detects generating unit speed and to the overspeed detection device output signal, when m platform tachometer of measuring detects the hydraulic turbine generator over speed of rotation, described overspeed detection device is to the actuating device output speed-regulating signal of overrunning, described n is the positive integer greater than 2, and described m is greater than 2 and less than the positive integer of n;
S2, the described actuating device of overrunning judge that whether speed regulator satisfies the main tripping condition of joining, and main when joining the tripping condition when satisfying, the master of described speed regulator joins according to the contact action of moving position, and described master joins according to moving condition is:
1) the hydraulic turbine generator rotating speed greater than unit rated speed Ne 115% and be in rising edge, in the present embodiment, rising edge namely refer to the hydraulic turbine generator rotating speed the rotating speed of current time greater than on constantly a rotating speed;
2) after the unit removal of load, when stator was closed back, it was negative value that the guide vane opening setting value deducts the actual aperture of stator;
3) displacement of main control valve physical location and its middle position is negative value.
In the present embodiment, the main tripping condition of joining must be to judge during greater than the rising edge of 115%*Ne rotating speed point just rationally at generating unit speed, in addition, puts contact and moves insecure shortcoming for overcoming main coordination, defines the tripping condition of joining of leading in the speed regulator program.Principle is after the unit removal of load, when speed regulator closes back stator, it is negative value that the guide vane opening setting value deducts the actual aperture of stator, and this moment the main control valve position with its in the middle of the displacement of position also should be negative value (moving toward closing direction), in the present embodiment, set the opening of main control valve to the postive direction that is the main control valve displacement.
Present embodiment realizes reliably obtaining of 115%*Ne tach signal by tach signal " three select two " circuit, avoids single the causing of overspeed protection signal to protect malfunction or tripping.Mainly join tripping contact Rule of judgment by improving simultaneously, avoid the main tripping signal of joining incorrect and cause the overspeed protection malfunction.
Need to prove that main control valve can adopt existing any main control valve among the present invention, its with external equipment be connected and operating method also can adopt prior art, do not give unnecessary details at this.
In the description of this specification, concrete feature, structure, material or characteristics that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example description are contained at least one embodiment of the present invention or the example.In this manual, the schematic statement to above-mentioned term not necessarily refers to identical embodiment or example.And concrete feature, structure, material or the characteristics of description can be with the suitable manner combination in any one or more embodiments or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple variation, modification, replacement and modification to these embodiments under the situation that does not break away from principle of the present invention and aim, scope of the present invention is limited by claim and equivalent thereof.
Claims (6)
1. hydraulic turbine generator overspeed protection circuit; it is characterized in that: comprise the n platform tachometer of measuring that is installed on the hydraulic turbine generator; overspeed detection device and the actuating device of overrunning; described n is the positive integer greater than 2; described n platform tachometer of measuring links to each other with overspeed detection device; described overspeed detection device links to each other with the actuating device of overrunning; described overspeed detection device receives the testing signal of described n platform tachometer of measuring; when m platform tachometer of measuring detects the hydraulic turbine generator over speed of rotation; described overspeed detection device is exported the signal of overrunning to the actuating device of overrunning; the described actuating device of overrunning is regulated the hydraulic turbine generator rotating speed, and described m is greater than 2 and less than the positive integer of n.
2. the described hydraulic turbine generator overspeed protection of claim 1 circuit, it is characterized in that: described overspeed detection device is made of n relay, and described n is the positive integer greater than 2;
The output terminal of k platform tachometer of measuring links to each other with the input circuit of k relay, described k=1,2 ..., n;
In the input circuit and output loop of a described n relay, every m loop is composed in series a branch road, does not contain input circuit and the output loop that is positioned at same relay in described each bar, and described m is greater than 2 and less than the positive integer of n;
The two ends of described branch road link to each other with the two ends of the actuating device of overrunning respectively.
3. hydraulic turbine generator overspeed protection circuit as claimed in claim 1; it is characterized in that: described n is 3; described m is 2; the input circuit of the input circuit of described first relay and second relay is composed in series first branch road; the input circuit of the output loop of described first relay and the 3rd relay is composed in series second branch road; the output loop of the output loop of described second relay and the 3rd relay is composed in series the 3rd branch road, and the two ends of the described actuating device of overrunning link to each other with described first branch road, second branch road and the two ends of the 3rd branch road respectively.
4. a method of utilizing claim 1 or 2 described hydraulic turbine generator overspeed protection circuit to carry out overspeed protection is characterized in that, comprises the steps:
S1, n platform tachometer of measuring detects hydraulic generator unit rotating speed and to the overspeed detection device output signal, when m platform tachometer of measuring detects the hydraulic turbine generator over speed of rotation, described overspeed detection device is exported the signal of overrunning to the actuating device of overrunning, described n is the positive integer greater than 2, and described m is greater than 2 and less than the positive integer of n;
S2, the described actuating device of overrunning judge that whether speed regulator satisfies the main tripping condition of joining, and main when joining the tripping condition when satisfying, the master of described speed regulator joins according to the contact action of moving position, and described master joins according to moving condition is:
The hydraulic turbine generator rotating speed greater than unit rated speed Ne 115% and be in rising edge;
After the unit removal of load, when stator was closed back, it was negative value that the guide vane opening setting value deducts the actual aperture of stator;
The displacement of main control valve physical location and its middle position is negative value.
5. hydraulic turbine generator overspeed protection method as claimed in claim 4, it is characterized in that: described overspeed detection device is made of n relay, and described n is the positive integer greater than 2;
The output terminal of k platform tachometer of measuring links to each other with the input circuit of k relay, described k=1,2 ..., n;
In the input circuit and output loop of a described n relay, every m loop is composed in series a branch road, does not contain input circuit and the output loop that is positioned at same relay in described each bar, and described m is greater than 2 and less than the positive integer of n;
The two ends of described branch road link to each other with the two ends of the actuating device of overrunning respectively.
6. hydraulic turbine generator overspeed protection method as claimed in claim 4; it is characterized in that: described n is 3; described m is 2; the input circuit of the input circuit of described first relay and second relay is composed in series first branch road; the input circuit of the output loop of described first relay and the 3rd relay is composed in series second branch road; the output loop of the output loop of described second relay and the 3rd relay is composed in series the 3rd branch road, and the two ends of described three branch roads link to each other with the two ends of the actuating device of overrunning respectively.
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| CN201310276592.5A CN103321826B (en) | 2013-07-02 | 2013-07-02 | A kind of hydraulic turbine generator overspeed protection circuit and controlling method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310276592.5A CN103321826B (en) | 2013-07-02 | 2013-07-02 | A kind of hydraulic turbine generator overspeed protection circuit and controlling method thereof |
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| CN103321826A true CN103321826A (en) | 2013-09-25 |
| CN103321826B CN103321826B (en) | 2015-10-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139352A (en) * | 2018-11-06 | 2019-01-04 | 贵州电网有限责任公司 | A kind of judgement hydrogovernor master matches the device and measurement method of tripping |
| CN109611263A (en) * | 2018-12-31 | 2019-04-12 | 安徽响水涧抽水蓄能有限公司 | A kind of speed regulating system of water-turbine generator set main control valve tripping measuring device and its control method |
| CN111365188A (en) * | 2020-04-22 | 2020-07-03 | 中国电建集团成都勘测设计研究院有限公司 | Primary overspeed protection system of hydropower station |
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| JPS63192964A (en) * | 1987-02-04 | 1988-08-10 | Toshiba Eng Co Ltd | Governor computing constant change-over circuit |
| JPH09195920A (en) * | 1996-01-17 | 1997-07-29 | Hitachi Ltd | Controller for hydraulic power plant |
| JP2004135422A (en) * | 2002-10-10 | 2004-04-30 | Toyo Electric Mfg Co Ltd | High-speed rotation prevention circuit of power generation apparatus for distributed power supply |
| CN202596973U (en) * | 2012-05-15 | 2012-12-12 | 重庆市合川区供电有限责任公司 | Automatic stopping device for small hydraulic generator set |
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Patent Citations (5)
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| JPS5882076A (en) * | 1981-11-11 | 1983-05-17 | Hitachi Ltd | Control of operation of hydraulic machine |
| JPS63192964A (en) * | 1987-02-04 | 1988-08-10 | Toshiba Eng Co Ltd | Governor computing constant change-over circuit |
| JPH09195920A (en) * | 1996-01-17 | 1997-07-29 | Hitachi Ltd | Controller for hydraulic power plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139352A (en) * | 2018-11-06 | 2019-01-04 | 贵州电网有限责任公司 | A kind of judgement hydrogovernor master matches the device and measurement method of tripping |
| CN109611263A (en) * | 2018-12-31 | 2019-04-12 | 安徽响水涧抽水蓄能有限公司 | A kind of speed regulating system of water-turbine generator set main control valve tripping measuring device and its control method |
| CN111365188A (en) * | 2020-04-22 | 2020-07-03 | 中国电建集团成都勘测设计研究院有限公司 | Primary overspeed protection system of hydropower station |
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| CN103321826B (en) | 2015-10-21 |
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