CN104963806A - Power-loss protection system of water turbine generator unit speed regulator - Google Patents
Power-loss protection system of water turbine generator unit speed regulator Download PDFInfo
- Publication number
- CN104963806A CN104963806A CN201510376418.7A CN201510376418A CN104963806A CN 104963806 A CN104963806 A CN 104963806A CN 201510376418 A CN201510376418 A CN 201510376418A CN 104963806 A CN104963806 A CN 104963806A
- Authority
- CN
- China
- Prior art keywords
- valve
- emergency shutdown
- speed regulator
- power
- loss protecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Landscapes
- Control Of Water Turbines (AREA)
Abstract
The invention relates to a power-loss protection system of a water turbine generator unit speed regulator. A manual/automatic switching valve is connected with a proportional valve through a control pipeline. An emergency shutdown executing valve is connected with the manual/automatic switching valve through a control pipeline. An emergency shutdown control valve is connected with the emergency shutdown executing mechanism through a control pipeline. A stepping displacement conversion device is connected with the manual/automatic switching valve through a control pipeline. A main distributing valve is connected with the emergency shutdown executing mechanism through a control pipeline. A power-loss protection diverter valve is connected with the emergency shutdown executing valve and the main distributing valve through a control pipeline at the same time. A second electromagnetic valve is connected with the power-loss protection diverter valve through a control pipeline. A first electromagnetic valve is connected with the second electromagnetic valve and the emergency shutdown executing mechanism at the same time. According to the actual power station needs, a power-loss self-hold mode and a power-loss self-switching mode can be switched at will, and more flexibility is achieved. For the situation that a single-coil electromagnetic valve is powered on for a long term, and consequently a coil is burned out and breaks down, the redundancy protection measure is increased, and the system is safer and more reliable.
Description
Technical field
The present invention relates to a kind of loss protecting system, particularly relate to a kind of turbine-generator units speed regulator loss protecting system.
Background technique
At present, domestic large hydropower station speed regulator, the generator protection design proposal when the full dead electricity of electric part has two kinds of modes usually, and the first is dead electricity self closing, and the second is dead electricity self-sustaining.These two kinds of design proposal starting points are different, and wherein, dead electricity self closing scheme is it is considered that as the speed regulator of turbine-generator units control core once dead electricity, unit exists risk out of control, now should shut down in time; Dead electricity self-sustaining scheme, it is considered that maintain set steady, is guaranteed to run and generating state.When speed regulator dead electricity, electric liquid conversion equipment is switched to state again, cuts off the control oil sources of servomotor, makes unit maintain current state and runs.
This two schemes respectively has application at present, also cuts both ways.Water power plant Reference Design standard and grid requirements adopt one, reply speed regulator Loss of power failure or employing shutdown operation, or maintain normal operating condition of unit.Once after scheme determines to implement, can not need to change selection flexibly according to the later stage, lack flexibility and adaptability.As the schematic diagram that Fig. 2 is the former scheme of the present invention.
Summary of the invention
Technical problem to be solved by this invention is for above-mentioned the deficiencies in the prior art, and provides a kind of switching flexibly, practical turbine-generator units speed regulator loss protecting system.
In order to realize above-mentioned technical characteristics, the technical solution adopted in the present invention is: a kind of turbine-generator units speed regulator loss protecting system, it comprises Proportional valve, hand/automatic transfer valve is connected with Proportional valve by pilot line, emergency shutdown is performed valve and is connected with hand/automatic transfer valve by pilot line simultaneously, engine off control valve performs valve by pilot line and emergency shutdown and is connected, step-wise displacement conversion equipment is connected with hand/automatic transfer valve by pilot line, main control valve performs valve by pilot line and emergency shutdown and is connected, loss protecting switching valve performs valve with emergency shutdown by pilot line simultaneously and is connected with main control valve, No. two solenoid valves are connected with loss protecting switching valve by pilot line, a solenoid valve performs valve with No. two solenoid valves and emergency shutdown simultaneously and is connected.
A described solenoid valve adopts two-position four-way solenoid directional control valve.
Described No. two solenoid valves adopt two-position four-way solenoid directional control valve.
The oil outlet of a described solenoid valve is connected with return line.
Described loss protecting switching valve is the Double coil electromagnetic valve of band manual switchover function.
The present invention has following beneficial effect:
The present invention adds loss protecting switching valve, a solenoid valve and No. two solenoid valves and constitutes new loss protecting selective system on the basis of original design proposal; when needs speed regulator works in dead electricity self-sustaining mode; by manual or electronic mode, loss protecting switching valve is switched to leftward position in Fig. 1; namely the A mouth of loss protecting switching valve leads to P mouth; the process oil that the A mouth so performing valve by emergency shutdown controls directly is communicated with the control chamber of main control valve by loss protecting switching valve, does not change former scheme control principle.
When needs speed regulator works in dead electricity self closing mode; by manual or electronic mode, loss protecting switching valve 7 is switched to right positions in Fig. 1, the control chamber of main control valve 5 performs the A mouth of valve 3 by No. two solenoid valves, solenoid valve and emergency shutdown or oil return communicates.
The present invention devises a kind of speed regulator loss protecting way selection system on former scheme basis, can, according to power station actual demand any switching laws between dead electricity self-sustaining and dead electricity self closing two kinds of patterns, make selection more flexible.And be energized for a long time for single-coil electromagnetic valve and easily cause coil to blow fault adding redundancy protecting measure, make system more safe and reliable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is hydraulic system connection diagram of the present invention.
Fig. 2 is the hydraulic system connection diagram of original scheme of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the present invention are described further.
See Fig. 1, a kind of turbine-generator units speed regulator loss protecting system, it comprises Proportional valve 1, hand/automatic transfer valve 2 is connected with Proportional valve 1 by pilot line, emergency shutdown is performed valve 3 and is connected with hand/automatic transfer valve 2 by pilot line simultaneously, engine off control valve 4 performs valve 3 by pilot line and emergency shutdown and is connected, step-wise displacement conversion equipment 6 is connected with hand/automatic transfer valve 2 by pilot line, main control valve 5 performs valve 3 by pilot line and emergency shutdown and is connected, loss protecting switching valve 7 performs valve 3 with emergency shutdown by pilot line simultaneously and is connected with main control valve 5, No. two solenoid valves 9 are connected with loss protecting switching valve 7 by pilot line, a solenoid valve 8 performs valve 3 with No. two solenoid valves 9 and emergency shutdown simultaneously and is connected.
Further, a described solenoid valve 8 adopts two-position four-way solenoid directional control valve.
Further, described No. two solenoid valves 9 adopt two-position four-way solenoid directional control valve.
Further, the oil outlet of a described solenoid valve 8 is connected with return line.
Further, described loss protecting switching valve 7 is the Double coil electromagnetic valve of band manual switchover function.
See Fig. 1, working principle of the present invention is:
When needs speed regulator works in dead electricity self-sustaining mode; by manual or electronic mode, loss protecting switching valve 7 is switched to leftward position in figure; namely the A mouth of loss protecting switching valve 7 leads to P mouth; the process oil that the A mouth so performing valve 3 by emergency shutdown controls directly is communicated by the control chamber of loss protecting switching valve 7 with main control valve 5, does not change former scheme control principle.
When needs speed regulator works in dead electricity self closing mode; by manual or electronic mode, loss protecting switching valve 7 is switched to right positions in figure, the control chamber of main control valve 5 performs the A mouth of valve 3 by No. two solenoid valves 9, solenoid valve 8 and emergency shutdown or oil return communicates.Now the work in combination mode of No. two solenoid valves 9, solenoid valve 8 can have two kinds of different designs to select:
Embodiment 1: during system worked well, a solenoid valve 8 is energized actuating coil excitation, No. two solenoid valve 9 power-off coils not excitation.Under which, during system worked well, oil circuit is: emergency shutdown performs A mouth → main control valve 5 control chamber of the T mouth → loss protecting switching valve 7 of the B mouth → loss protecting switching valve 7 of P mouth → No. bis-solenoid valve 9 of A mouth → No. bis-solenoid valve 9 of P mouth → No. mono-solenoid valve 8 of A mouth → No. mono-solenoid valve 8 of valve 3.If speed regulator dead electricity; the all power-off of a solenoid valve 8, No. two solenoid valves 9, the A mouth of a solenoid valve 8 communicates with oil return T mouth, and main control valve 5 control chamber leads to oil return by a solenoid valve 8; main control valve 5 spool upwards motion action servomotor closes stator, makes compressor emergency shutdown.Because a solenoid valve 8 is single coil structure, during work, coil one leads directly to field current, and long-term work is likely blown and caused unexpected dead electricity.If there is coil surprisingly blow situation, electrical control drops into No. two solenoid valves 9.Main control valve 5 control chamber still can be communicated with the oil circuit control that emergency shutdown performs valve 3 by No. two solenoid valves 9, does not affect normal work.
Embodiment 2: during system worked well, a solenoid valve 8, No. two solenoid valves 9 are energized actuating coil excitation.Under which, during system worked well, oil circuit is: emergency shutdown performs A mouth → main control valve 5 control chamber of the T mouth → loss protecting switching valve 7 of the B mouth → loss protecting switching valve 7 of T mouth → No. bis-solenoid valve 9 of A mouth → No. bis-solenoid valve 9 of valve 3.If speed regulator dead electricity, all power-off of a solenoid valve 8, No. two solenoid valves 9, main control valve 5 control chamber leads to oil return by a solenoid valve 8, and main control valve 5 spool upwards motion action servomotor closes stator, makes compressor emergency shutdown.If solenoid valve 8 coil surprisingly blows; do not affect oil circuit control; if No. two solenoid valve 9 coils surprisingly blow, then main control valve 5 control chamber still can be communicated with the oil circuit control that emergency shutdown performs valve 3 by No. two solenoid valves 9, solenoid valve 8, does not affect normal work.
Further, No. two solenoid valves 9, solenoid valve 8 two kinds of various combination working methods respectively have pluses and minuses, mode 1 advantage be No. two solenoid valves 9 normally work time can not come into operation, coil long service life.Shortcoming needs electrical control to start upper input No. two solenoid valves 9, and make design logic complicated, action is unreliable.The advantage of mode 2 be for solenoid valve be energized for a long time cause unexpected broken string dead electricity time without the need to additionally increasing electrical control logic, reliable in action is simple, shortcoming is that when normally working, two solenoid valves all need the input that is energized for a long time, adds the possibility of solenoid valve broken string, and rate of fault increases.
See Fig. 2, it is the hydraulic system connection diagram of original scheme of the present invention.When hand/automatic transfer valve 2 be switched to controlled by Proportional valve 1 time, after pressure oil is filtered by duplex strainer, enter control chamber above main control valve 5 spool by Proportional valve 1 by switching valve 2, emergency stop valve 3.Time normal, constant voltage chamber, main control valve 5 spool bottom leads to pressure oil and produces upwards permanent active force, Proportional valve 1 can be controlled by the pressure adjusting control chamber above main dispensing spool main dispensing spool upwards (pass stator) or (convincing leaf by patient analysis) motion downwards (the upper and lower cavity area of main dispensing spool is differential pressure type.When Proportional valve leads to pressure oil/oil return to main dispensing spool control chamber, then make main dispensing spool to lower/upper movement), open main control valve hydraulic fluid port and join oil to guide vane servomotor, thus by controlling the switch of servomotor motion control guide vane.When hand/automatic transfer valve 2 be switched to controlled by step-wise displacement conversion equipment 6 time, principle and Proportional valve 1 control mode basically identical.
If speed regulator dead electricity, hand/automatic transfer valve 2 electromagnetic coil dead electricity, spool is in step-wise displacement conversion equipment 6 control position, and due to the same dead electricity of stepper motor, now in fact step-wise displacement conversion equipment 6 is in pure mechanical, hand-driven state.Be under driving due to the function in device runback of the pilot valve in step-wise displacement conversion equipment and join oily meta, the control oil sources of servomotor is cut off, and makes unit maintain current state and runs.
Claims (5)
1. a turbine-generator units speed regulator loss protecting system, it comprises Proportional valve (1), hand/automatic transfer valve (2) is connected with Proportional valve (1) by pilot line, emergency shutdown is performed valve (3) and is connected with hand/automatic transfer valve (2) by pilot line simultaneously, engine off control valve (4) performs valve (3) by pilot line and emergency shutdown and is connected, step-wise displacement conversion equipment (6) is connected with hand/automatic transfer valve (2) by pilot line, main control valve (5) performs valve (3) by pilot line and emergency shutdown and is connected, it is characterized in that: loss protecting switching valve (7) performs valve (3) with emergency shutdown by pilot line simultaneously and is connected with main control valve (5), No. two solenoid valves (9) are connected with loss protecting switching valve (7) by pilot line, a solenoid valve (8) performs valve (3) with No. two solenoid valves (9) and emergency shutdown simultaneously and is connected.
2. a kind of turbine-generator units speed regulator loss protecting system according to claim 1, is characterized in that: a described solenoid valve (8) adopts two-position four-way solenoid directional control valve.
3. a kind of turbine-generator units speed regulator loss protecting system according to claim 1, is characterized in that: described No. two solenoid valves (9) adopt two-position four-way solenoid directional control valve.
4. a kind of turbine-generator units speed regulator loss protecting system according to claim 1, is characterized in that: the oil outlet of a described solenoid valve (8) is connected with return line.
5. a kind of turbine-generator units speed regulator loss protecting system according to claim 1, is characterized in that: described loss protecting switching valve (7) is the Double coil electromagnetic valve of band manual switchover function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510376418.7A CN104963806A (en) | 2015-07-01 | 2015-07-01 | Power-loss protection system of water turbine generator unit speed regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510376418.7A CN104963806A (en) | 2015-07-01 | 2015-07-01 | Power-loss protection system of water turbine generator unit speed regulator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104963806A true CN104963806A (en) | 2015-10-07 |
Family
ID=54217860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510376418.7A Pending CN104963806A (en) | 2015-07-01 | 2015-07-01 | Power-loss protection system of water turbine generator unit speed regulator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104963806A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139350A (en) * | 2018-09-29 | 2019-01-04 | 东方电机控制设备有限公司 | A kind of overspeed protection and volume control device for hydroenergy storage station |
| CN109236803A (en) * | 2018-09-29 | 2019-01-18 | 东方电机控制设备有限公司 | It is a kind of for the hydraulic system with function of redundancy protection |
| CN109458292A (en) * | 2018-09-29 | 2019-03-12 | 东方电机控制设备有限公司 | A kind of governor power down self-sustaining self closing method |
| CN112502893A (en) * | 2020-11-13 | 2021-03-16 | 大唐水电科学技术研究院有限公司 | Control device with power-on closing and power-off closing functions |
| CN112855642A (en) * | 2019-11-28 | 2021-05-28 | 北汽福田汽车股份有限公司 | Electric control valve device, parking system and vehicle |
| CN114458522A (en) * | 2022-01-29 | 2022-05-10 | 宜昌清阳科技有限公司 | Speed regulator control system of water turbine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2864145Y (en) * | 2006-01-09 | 2007-01-31 | 武汉事达电气股份有限公司 | Multifunctional actuating mechanism for hydraulic control type main distributing valve |
| CN201025232Y (en) * | 2007-04-03 | 2008-02-20 | 武汉东顺机械制造有限公司 | Mechanical hydraulic pressure system with speed adjuster capable of automatic center recovery function |
| CN201326507Y (en) * | 2008-12-16 | 2009-10-14 | 国网新源控股有限公司 | Device for realizing self-resetting function of speed control system of water turbine-generator set |
| CN101672244A (en) * | 2009-10-01 | 2010-03-17 | 王晓罡 | Power loss protecting device of fast-stopping electromagnetic valve of hydraulic turbine governor |
| CN204716455U (en) * | 2015-07-01 | 2015-10-21 | 中国长江电力股份有限公司 | A kind of turbine-generator units speed regulator loss protecting system |
-
2015
- 2015-07-01 CN CN201510376418.7A patent/CN104963806A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2864145Y (en) * | 2006-01-09 | 2007-01-31 | 武汉事达电气股份有限公司 | Multifunctional actuating mechanism for hydraulic control type main distributing valve |
| CN201025232Y (en) * | 2007-04-03 | 2008-02-20 | 武汉东顺机械制造有限公司 | Mechanical hydraulic pressure system with speed adjuster capable of automatic center recovery function |
| CN201326507Y (en) * | 2008-12-16 | 2009-10-14 | 国网新源控股有限公司 | Device for realizing self-resetting function of speed control system of water turbine-generator set |
| CN101672244A (en) * | 2009-10-01 | 2010-03-17 | 王晓罡 | Power loss protecting device of fast-stopping electromagnetic valve of hydraulic turbine governor |
| CN204716455U (en) * | 2015-07-01 | 2015-10-21 | 中国长江电力股份有限公司 | A kind of turbine-generator units speed regulator loss protecting system |
Non-Patent Citations (1)
| Title |
|---|
| 张辉，杨张斌，杨兴斌: "溪洛渡水电站调速***失电保护设计", 《水力发电》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139350A (en) * | 2018-09-29 | 2019-01-04 | 东方电机控制设备有限公司 | A kind of overspeed protection and volume control device for hydroenergy storage station |
| CN109236803A (en) * | 2018-09-29 | 2019-01-18 | 东方电机控制设备有限公司 | It is a kind of for the hydraulic system with function of redundancy protection |
| CN109458292A (en) * | 2018-09-29 | 2019-03-12 | 东方电机控制设备有限公司 | A kind of governor power down self-sustaining self closing method |
| CN109236803B (en) * | 2018-09-29 | 2023-12-15 | 东方电气自动控制工程有限公司 | Hydraulic system with redundancy protection function |
| CN109139350B (en) * | 2018-09-29 | 2024-01-26 | 东方电气自动控制工程有限公司 | Overspeed protection and flow control device for pumped storage power station |
| CN112855642A (en) * | 2019-11-28 | 2021-05-28 | 北汽福田汽车股份有限公司 | Electric control valve device, parking system and vehicle |
| CN112502893A (en) * | 2020-11-13 | 2021-03-16 | 大唐水电科学技术研究院有限公司 | Control device with power-on closing and power-off closing functions |
| CN114458522A (en) * | 2022-01-29 | 2022-05-10 | 宜昌清阳科技有限公司 | Speed regulator control system of water turbine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104963806A (en) | Power-loss protection system of water turbine generator unit speed regulator | |
| CN109268347B (en) | Generator set and steam turbine interruption early warning system thereof | |
| CN202215422U (en) | Intelligent oil pressure control system for hydroelectric power station governor | |
| CN204716455U (en) | A kind of turbine-generator units speed regulator loss protecting system | |
| CN202196323U (en) | Main transformer cooling intelligent control system of hydroelectric station | |
| CN103470441B (en) | The hydraulic pressure installation of a kind of water turbine governing and protective system | |
| CN209444655U (en) | It is a kind of for the hydraulic system with function of redundancy protection | |
| CN102879678B (en) | Tester for electromagnetic valve | |
| CN102734353B (en) | Brake hydraulic station, brake device, lifting equipment and engineering machinery | |
| CN202196301U (en) | Seepage draining intelligence control system of water power station | |
| CN104235109B (en) | Axial flow compressor servo closed loop redundant electrohydraulic proportional control apparatus | |
| CN112377475A (en) | Automatic control system for pipeline groove | |
| CN210239900U (en) | Hydraulic turbine speed regulator with start-stop protection function | |
| CN213928620U (en) | Control device with power-on closing and power-off closing functions | |
| CN203670089U (en) | Water-pumping energy-storing unit guide vane delaying closing system | |
| CN209100189U (en) | A kind of governor power down self-sustaining self-closing device | |
| CN113309660B (en) | Intelligent sectional closing control system and method for speed regulator | |
| CN212584038U (en) | Electro-hydraulic reversing valve group with power-off emergency stop control | |
| CN211370603U (en) | Hydraulic turbine speed regulator and water intaking valve linkage protection device | |
| CN109236803B (en) | Hydraulic system with redundancy protection function | |
| CN202228325U (en) | Medium voltage air compressor intelligent control system of hydropower station | |
| CN213981036U (en) | Water turbine accident pressure distribution valve regulation and control system | |
| CN109458292B (en) | Self-holding self-closing method for speed regulator power failure | |
| CN205936957U (en) | Governor of hydraulic turbine emergency shut down device based on double magnet valve and interstage valve | |
| CN210829409U (en) | Real-time monitoring device for preventing faults of hydraulic control valve of low-pressure cylinder communicating pipe in steam turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151007 |
|
| RJ01 | Rejection of invention patent application after publication |