CN102798821A - Test method for checking zero-initial step-up capacity of single unit with many main transformers in hydropower plant - Google Patents
Test method for checking zero-initial step-up capacity of single unit with many main transformers in hydropower plant Download PDFInfo
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- CN102798821A CN102798821A CN2012102969595A CN201210296959A CN102798821A CN 102798821 A CN102798821 A CN 102798821A CN 2012102969595 A CN2012102969595 A CN 2012102969595A CN 201210296959 A CN201210296959 A CN 201210296959A CN 102798821 A CN102798821 A CN 102798821A
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Abstract
The invention discloses a test method for checking zero-initial step-up capacity of a single unit with many main transformers in a hydropower plant and aims to check the capacity of the hydropower plant for rapidly and stably stepping up from zero by using one unit with two (or more) main transformers in black starting in case of unexpected power outage because of power grid accidents. The test method comprises the following contents of: stepping up from zero (initiating excitation) by using one unit with two (or more) main transformers, and recording voltage, increased/decreased rotating speed and excitation and the like in the process; analyzing whether the zero-initial step-up of the single unit with two (or more) main transformers has influences on the above various aspects and judging whether the hydropower plant has the capacity of stepping up from zero by using the single unit with many main transformers in black starting.
Description
Technical field
The present invention relates under the unexpected power-off condition of power grid accident, the hydroelectric power plant deceives the zero verification method that rises ability of the many main transformers of employing unit band when starting.
Background technology
Black startup refers to whole (or local), and the collapse of electrical network failover has a power failure; Be in complete " deceiving " state; This moment startup or external power supply through having the self-startup ability unit in the system; The unit starting of no self-startup ability in the drive system progressively restores electricity the collapse electrical network, realizes that finally total system recovers normal process.
Zero works boost (increasing progressively pressurization) is meant generator, transformer or generator transformer group, bus, circuit and the relevant device that is attached thereto, and begins from no-voltage, progressively steadily boosts, until rated voltage or rated voltage 1.05-1.1 times.Self-startup ability is meant under the situation that does not have external power supply to supply with, and unit starts and possesses ability from electricity to system that send from stopped status at the appointed time.
At present; The hydroelectric power plant generally drives the various backup systems of treating the starter-generator group through diesel-driven generator or adopts and wait to start the unit guarantor station service operation of unit different units; And this dual mode all can not make moderate progress on quick recovery system, so the hydroelectric power plant is black, and the many main transformers of unit band zero rise test when starting method is just arisen at the historic moment.And whether unit possesses the ability of zero liter of the many main transformer of unit band, then can be able to checking through the present invention.
Summary of the invention
The objective of the invention is: the checking hydroelectric power plant fast, stably uses two (or many) main transformers of a unit band zero to work the ability of boosting under the unexpected situation about having a power failure of power grid accident during black the startup.
The object of the invention is implemented through following technical scheme:
A, know that test unit and Liang Tai (or many) main transformer, 220KV (or 500KV) bus have possessed the zero hot stand-by duty that rises;
B, usefulness " charging is closed " (each factory is own) the mode main transformer switch that closes;
C, this unit of host computer operation " main transformer zero rises start ";
D, keeping watch on this unit, that main transformer zero is worked the excitation of boosting is normal, observes and write down this unit excitation machine end initial voltage, bus voltage value;
E, one of them main transformer busbar voltage is raised to ratings, observes and write down another main transformer bus voltage value; Repeat this operation with opposite way;
F, with each numerical value arrangement of above record, analyze, preserve
Said content a comprises test unit excitation power supply and cuts to direct current, and the station service backup auto-activating device is stopped using, and two main transformer neutral grounds reach corresponding test bus and are in stand-by state, and each relevant protection is withdrawed from, and prevents misoperation.
Unloaded charging is provided with " charging is closed " mode from 220KV (500KV) bus high-pressure side to main transformer for main transformer switch among the said content b.
Among the said content d will unit main transformer zero is hoisted positive pressure normal after, observe and write down this unit excitation machine end initial voltage, bus voltage value again.
Among the said content e two main transformers are boosted to load voltage value respectively separately, check the situation of change of another main transformer bus voltage value.
The requirement whether this unit possesses zero liter of the many main transformer of unit band is identified in all numerical value of noting arrangements, analysis before among the said content f, and record.
Adopt above content of the present invention; Can be used to check hydroelectric power plant's unit whether to possess under the unexpected situation about having a power failure of power grid accident; Fast, stably use two (or many) main transformers of a unit band zero to work the ability of boosting, a kind of new method is provided for whether hydroelectric power plant's checking unit possesses black start-up ability.
Description of drawings
Below in conjunction with accompanying drawing and instance this method is further specified.Fig. 1 is that No. 1 machine works the figure that boosts to 01, No. 02 main transformer zero.
Among the figure: 1 (No. 1 machine), 2 (No. 01 main transformers), 3 (No. 02 main transformers), 4 (the secondary bus of 220KV or 500KV), 5 (220KV or 500KV positive bus-bars), 6 (No. 01 unit buses), 7 (No. 02 unit buses), 8 (No. 01 secondary female plug-in strip of main transformer), 9 (No. 01 positive female plug-in strips of main transformer), 10 (No. 02 secondary female plug-in strip of main transformer), 11 (No. 02 positive female plug-in strips of main transformer), 12 (No. 01 main transformer switch), 13 (No. 02 main transformer switch)
Embodiment
With Fig. 1 is example; Then this mode is boosted for (1) No. 1 machine rises (2) 01, (3) No. 02 main transformers zero; Know machine (1) No. 1; (2) 01, (3) No. 02 main transformers, the secondary bus of (4) 220KV (perhaps 500KV) have possessed zero and have risen hot stand-by duty, (2) 01, (3) No. 02 main transformer neutral ground.
With " charging is closed " mode main transformer switch that closes (12) 01, (13) No. 02.Promptly except (8) No. 01 secondary female plug-in strips of main transformer, (10) No. 02 secondary female plug-in strips of main transformer are outside closing a floodgate, and main transformer low-pressure side set generator switch and factory's distribution transforming switch are all drawing back.
At (12) No. 01 main transformer switch of host computer setting in " separating brake " position; (1) No. 1 machine of host computer operation " main transformer zero rises start "; It is normal to zero excitation of boosting of (2) 01, (3) No. 02 main transformers to keep watch on (1) No. 1 machine, writes down (1) No. 1 machine excitation machine end initial voltage, (2) 01, (3) No. 02 bus voltage value;
(6) No. 01 busbar voltages are raised to ratings, write down (7) No. 02 bus voltage value; (7) No. 02 busbar voltages are raised to ratings, write down (6) No. 01 bus voltage value;
With all numerical value of noting arrangements, analysis before, identify the requirement whether this unit possesses zero liter of the many main transformer of unit band, and record.
Through the test of foregoing, whether possess under the unexpected situation about having a power failure of power grid accident with the checking hydroelectric power plant, fast, stably use two (or many) main transformers of a unit band zero to work the ability of boosting during black the startup.According to the arrangement of each item numerical value, the analysis noted, can judge whether Hydropower Unit can unit zero liter many main transformer ability.
Claims (6)
1. the many main transformers of hydroelectric power plant's unit band zero rise the test method of proficiency testing; It is characterized in that: let the test unit be in the black preceding state that starts; The excitation excitation exchanges and draws back, and excitation is cut manually, tests two (or many) main transformers and is in hot stand-by duty; Neutral ground is taken off and is tested relevant protection pressing plate.
2. and then make an experiment, the checking unit possesses with two (or many) main transformers zero and works the ability of boosting, and concrete steps are following:
A, know that test unit and Liang Tai (or many) main transformer, 220KV (or 500KV) bus have possessed the zero hot stand-by duty that rises;
B, usefulness " charging is closed " (each factory is own) the mode main transformer switch that closes;
C, this unit of host computer operation " main transformer zero rises start ";
D, keeping watch on this unit, that main transformer zero is worked the excitation of boosting is normal, observes and write down this unit excitation machine end initial voltage, unit bus voltage value;
E, one of them main transformer voltage is raised to ratings, observes and write down another main transformer magnitude of voltage; Repeat this operation with opposite way;
F, with each numerical value arrangement of above record, analyze, preserve
Rise the test method of proficiency testing according to the many main transformers of claim 1 unit band zero; It is characterized in that: said content a comprises test unit excitation power supply and cuts to direct current; Excitation is cut manually, two main transformer neutral grounds, and corresponding test bus is in stand-by state; Each relevant protection is withdrawed from, and prevents misoperation.
3. rise the test method of proficiency testing according to the many main transformers of claim 1 unit band zero, it is characterized in that: unloaded charging is provided with " charging is closed " mode from 220KV (500KV) bus high-pressure side to main transformer for main transformer switch among the said content b.
4. rise the test method of proficiency testing according to the many main transformers of claim 1 unit band zero, it is characterized in that: among the said content d will unit main transformer zero is hoisted positive pressure normal after, observe and write down this unit excitation machine end initial voltage, unit bus voltage value again.
5. rise the test method of proficiency testing according to the many main transformers of claim 1 unit band zero, it is characterized in that: among the said content e main transformer is boosted to load voltage value, check the situation of change of another main transformer bus voltage value.
6. rise the test method of proficiency testing according to the many main transformers of claim 1 unit band zero, it is characterized in that: all numerical value of noting arrangements, analysis before among the said content f, identify the requirement whether this unit possesses zero liter of the many main transformer of unit band, and record.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102969595A CN102798821A (en) | 2012-08-21 | 2012-08-21 | Test method for checking zero-initial step-up capacity of single unit with many main transformers in hydropower plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102969595A CN102798821A (en) | 2012-08-21 | 2012-08-21 | Test method for checking zero-initial step-up capacity of single unit with many main transformers in hydropower plant |
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| CN102798821A true CN102798821A (en) | 2012-11-28 |
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| CN2012102969595A Pending CN102798821A (en) | 2012-08-21 | 2012-08-21 | Test method for checking zero-initial step-up capacity of single unit with many main transformers in hydropower plant |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290342A (en) * | 2008-06-17 | 2008-10-22 | 四川中鼎科技有限公司 | Hydroelectric units black start-up ability verification test method |
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- 2012-08-21 CN CN2012102969595A patent/CN102798821A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101290342A (en) * | 2008-06-17 | 2008-10-22 | 四川中鼎科技有限公司 | Hydroelectric units black start-up ability verification test method |
Non-Patent Citations (1)
| Title |
|---|
| 吴军等: "珊溪水力发电厂的黑启动方案及分析", 《人民长江》, vol. 42, no. 9, 31 May 2011 (2011-05-31) * |
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Application publication date: 20121128 |