CN105552836A - Bearing bush temperature protection system of hydraulic power plant and protection method - Google Patents
Bearing bush temperature protection system of hydraulic power plant and protection method Download PDFInfo
- Publication number
- CN105552836A CN105552836A CN201610043876.3A CN201610043876A CN105552836A CN 105552836 A CN105552836 A CN 105552836A CN 201610043876 A CN201610043876 A CN 201610043876A CN 105552836 A CN105552836 A CN 105552836A
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- Prior art keywords
- temperature
- bearing bush
- protection system
- processor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
Abstract
The invention discloses a bearing bush temperature protection system of a hydraulic power plant and a protection method. The system comprises N bearing bushes; a temperature detection device is installed on every bearing bush; the N is a positive integer; every temperature detection device is equipped with an overtemperature warning output end; the overtemperature warning output end of every temperature detection device is connected to the input end of a processor in one-to-one correspondence; the processor receives the temperature signal of every temperature detection device and judges whether the temperature signal is more than an emergency shutdown temperature set value; when M temperature detection signals in the N temperature detection signals are more than the emergency shutdown temperature set value, the processor sends a shutdown signal to a shutdown device; and the M is a positive integer not more than the N. According to the system and the method of the invention, the bearing bush temperature protection reliability is improved by using the method of combining hard loop bearing bush temperature water machine protection with PLC program bearing bush temperature water machine protection.
Description
Technical field
The present invention relates to the bearing bush temperature protection of a kind of hydroelectric plant, particularly relate to a kind of hydroelectric plant bearing bush temperature protection system and guard method.
Background technology
Bearing bush temperature protection is all provided with in the water machine protection of current most of hydroelectric plants; the protection of hard Loop Water machine and PLC water machine protection (protection of local control unit LCU for generator set Program) two parallel protected modes are adopted in the protection of hydroelectric plant's water machine; just can export as long as namely hard Loop Water machine protection loop condition is satisfied; equally; as long as PLC water machine protection program conditional meets just start accidental shutdown flow process, two kinds of modes can independent effect.But due to logic imperfection, the malfunction usually causing bearing bush temperature to protect or tripping.
Summary of the invention
The present invention is intended at least solve the technical problem existed in prior art, especially innovatively proposes a kind of hydroelectric plant bearing bush temperature protection system and guard method.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of hydroelectric plant bearing bush temperature protection system, comprise N sheet bearing shell, each bearing shell is all provided with a temperature-detecting device, described N is positive integer; Described each temperature-detecting device all has a too high warning output of temperature; the too high warning output of temperature of each temperature-detecting device is connected with the input one_to_one corresponding of processor; described processor receives the temperature signal of described each temperature-detecting device detection and judges that whether described temperature signal is higher than accidental shutdown desired temperature; when having M temperature detection signal in N number of temperature detection signal higher than accidental shutdown desired temperature; then processor sends stopping signal to arresting gear, and described M is the positive integer being not more than N.
In a kind of preferred implementation of the present invention; also comprise N road inputs and door gear; described each temperature-detecting device also has one and shuts down output; the shutdown output of described each temperature-detecting device is connected with the input one_to_one corresponding of door gear; describedly be connected arresting gear with the output of door gear; when the shutdown output of all temperature-detecting devices all exports stopping signal, arresting gear starts, and shuts down.
In a kind of preferred implementation of the present invention, described processor selects single-chip microcomputer or PLC.
In a kind of preferred implementation of the present invention, described temperature-detecting device selects electronic thermostat.
In a kind of preferred implementation of the present invention, described electronic thermostat selects digital temperature control instument.
The invention discloses the method for a kind of hydroelectric plant bearing bush temperature protection system, described processor judges that flow process comprises the following steps:
Step one, processor gathers the signal value that all temperature-detecting devices export;
Step 2, initial setting output signal value is greater than the number X=0 of setting signal value, and described X is positive integer; Compare the magnitude relationship of the accidental shutdown desired temperature that the input signal values of collection and processor set one by one, if there is an input signal values to be greater than the accidental shutdown desired temperature of setting, then X+1;
Step 3, statistics input signal values is greater than the number Y of the accidental shutdown desired temperature of setting; If the number Y that input signal values is greater than the accidental shutdown desired temperature of setting is greater than or equal to the number m of setting, described m is the positive integer being not more than N, then processor output sends stopping signal;
Step 4, circulation step one to step 4.
In a kind of preferred implementation of the present invention, described m=2.
In a kind of preferred implementation of the present invention, described processor is single-chip microcomputer or PLC.
In a kind of preferred implementation of the present invention, described checkout gear is electronic thermostat.
In a kind of preferred implementation of the present invention, described electronic thermostat selects digital temperature control instument.
In sum; owing to have employed technique scheme; the invention has the beneficial effects as follows: adopt the bearing bush temperature water machine protection of hard loop to protect with PLC program bearing bush temperature water machine the method and system combined, improve the reliability to bearing bush temperature protection, prevent bearing bush temperature false protection or tripping.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
In describing the invention, unless otherwise prescribed and limit, it should be noted that, term " installation ", " being connected ", " connection " should be interpreted broadly, such as, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be directly be connected, also indirectly can be connected by intermediary, for the ordinary skill in the art, the concrete meaning of above-mentioned term can be understood as the case may be.
As shown in Figure 1, the invention discloses a kind of hydroelectric plant bearing bush temperature protection system, comprise N sheet bearing shell, each bearing shell is all provided with a temperature-detecting device, N is positive integer; In the present embodiment, temperature-detecting device selects electronic thermostat.In the execution mode that the present invention is more preferably, electronic thermostat selects digital temperature control instument.Each temperature-detecting device all has a too high warning output of temperature; the too high warning output of temperature of each temperature-detecting device is connected with the input one_to_one corresponding of processor; processor receives the temperature signal of each temperature-detecting device detection and judges that whether temperature signal is higher than accidental shutdown desired temperature; when having M temperature detection signal in N number of temperature detection signal higher than accidental shutdown desired temperature; then processor sends stopping signal to arresting gear, and M is the positive integer being not more than N.In the present embodiment, processor selects single-chip microcomputer or PLC.
In the present embodiment, if bearing shell number is too much, temperature sensor output can be taked first to be connected with chip parallel port, then be connected with processor by the output of chip serial ports; The defect of processor port deficiency can be saved like this.Such chip is a lot, such as 74LS series.
In the present embodiment; also comprise N road inputs and door gear; each temperature-detecting device also has one and shuts down output; the shutdown output of each temperature-detecting device is connected with the input one_to_one corresponding of door gear; arresting gear is connected with the output of door gear; when the shutdown output of all temperature-detecting devices all exports stopping signal, arresting gear starts, and shuts down.In the present embodiment, if be less than temperature-detecting device output with door input, can be connected with the output of door gear with the input of door gear with another.
The invention provides the method for a kind of hydroelectric plant bearing bush temperature protection system, processor judges that flow process comprises the following steps:
Step one, processor gathers the signal value that all temperature-detecting devices export; In the present embodiment, processor is single-chip microcomputer or PLC.
Step 2, initial setting output signal value is greater than the number X=0 of setting signal value, and X is positive integer; Compare the magnitude relationship of the accidental shutdown desired temperature that the input signal values of collection and processor set one by one, if there is an input signal values to be greater than the accidental shutdown desired temperature of setting, then X+1;
Step 3, statistics input signal values is greater than the number Y of the accidental shutdown desired temperature of setting; If the number Y that output signal value is greater than the accidental shutdown desired temperature of setting is greater than or equal to the number m of setting, m is the positive integer being not more than N, then processor output sends stopping signal; In the present embodiment, m=2.
Step 4, circulation step one to step 4.
In the present embodiment, checkout gear is electronic thermostat.In the preferred embodiment of the present invention, electronic thermostat selects digital temperature control instument.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (10)
1. hydroelectric plant's bearing bush temperature protection system, is characterized in that, comprises N sheet bearing shell, and each bearing shell is all provided with a temperature-detecting device, and described N is positive integer;
Each temperature-detecting device all has a too high warning output of temperature; the too high warning output of temperature of described each temperature-detecting device is connected with the input one_to_one corresponding of processor; described processor receives the temperature signal of described each temperature-detecting device detection and judges that whether described temperature signal is higher than accidental shutdown desired temperature; when having M temperature detection signal in N number of temperature detection signal higher than accidental shutdown desired temperature; then processor sends stopping signal to arresting gear, and described M is the positive integer being not more than N.
2. hydroelectric plant according to claim 1 bearing bush temperature protection system; it is characterized in that; also comprise N road inputs and door gear; described each temperature-detecting device also has one and shuts down output; the shutdown output of described each temperature-detecting device is connected with the input one_to_one corresponding of door gear, is describedly connected arresting gear with the output of door gear, when the shutdown output of all temperature-detecting devices all exports stopping signal; arresting gear starts, and shuts down.
3. hydroelectric plant according to claim 1 and 2 bearing bush temperature protection system, it is characterized in that, described processor selects single-chip microcomputer or PLC.
4. hydroelectric plant according to claim 1 and 2 bearing bush temperature protection system, it is characterized in that, described temperature-detecting device selects electronic thermostat.
5. hydroelectric plant according to claim 4 bearing bush temperature protection system, it is characterized in that, described electronic thermostat selects digital temperature control instument.
6. the method for hydroelectric plant according to claim 1 and 2 bearing bush temperature protection system, it is characterized in that, described processor judges that flow process comprises the following steps:
Step one, processor gathers the signal value that all temperature-detecting devices export;
Step 2, initial setting output signal value is greater than the number X=0 of setting signal value, and described X is positive integer; Compare the magnitude relationship of the accidental shutdown desired temperature that the input signal values of collection and processor set one by one, if there is an input signal values to be greater than the accidental shutdown desired temperature of setting, then X=X+1;
Step 3, statistics input signal values is greater than the number Y of the accidental shutdown desired temperature of setting; If the number Y that input signal values is greater than the accidental shutdown desired temperature of setting is greater than or equal to the number m of setting, described m is the positive integer being not more than N, then processor output sends stopping signal;
Step 4, circulation step one to step 4.
7. the method for hydroelectric plant according to claim 6 bearing bush temperature protection system, is characterized in that, described m=2.
8. the method for hydroelectric plant according to claim 6 bearing bush temperature protection system, is characterized in that, described processor is single-chip microcomputer or PLC.
9. the method for hydroelectric plant according to claim 6 bearing bush temperature protection system, is characterized in that, described checkout gear is electronic thermostat.
10. the method for hydroelectric plant according to claim 9 bearing bush temperature protection system, it is characterized in that, described electronic thermostat selects digital temperature control instument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610043876.3A CN105552836A (en) | 2016-01-22 | 2016-01-22 | Bearing bush temperature protection system of hydraulic power plant and protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610043876.3A CN105552836A (en) | 2016-01-22 | 2016-01-22 | Bearing bush temperature protection system of hydraulic power plant and protection method |
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| CN105552836A true CN105552836A (en) | 2016-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610043876.3A Pending CN105552836A (en) | 2016-01-22 | 2016-01-22 | Bearing bush temperature protection system of hydraulic power plant and protection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939591A (en) * | 2017-12-21 | 2018-04-20 | 四川大唐国际甘孜水电开发有限公司 | A kind of large and medium hydro-generator bearing bush temperature guard method |
Citations (4)
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| CN2938057Y (en) * | 2006-07-24 | 2007-08-22 | 中国南车集团戚墅堰机车车辆厂 | Bush temp, measuring device |
| CN202565223U (en) * | 2012-05-23 | 2012-11-28 | 东方电气集团东风电机有限公司 | Novel alternating-current asynchronous motor controller for all-electric car |
| US20150303679A1 (en) * | 2013-04-08 | 2015-10-22 | Huawei Device Co., Ltd. | Thermal Protection Circuit |
| CN205453093U (en) * | 2016-01-22 | 2016-08-10 | 重庆大唐国际武隆水电开发有限公司 | Axle bush temperature protection system of hydroelectric power plant |
-
2016
- 2016-01-22 CN CN201610043876.3A patent/CN105552836A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2938057Y (en) * | 2006-07-24 | 2007-08-22 | 中国南车集团戚墅堰机车车辆厂 | Bush temp, measuring device |
| CN202565223U (en) * | 2012-05-23 | 2012-11-28 | 东方电气集团东风电机有限公司 | Novel alternating-current asynchronous motor controller for all-electric car |
| US20150303679A1 (en) * | 2013-04-08 | 2015-10-22 | Huawei Device Co., Ltd. | Thermal Protection Circuit |
| CN205453093U (en) * | 2016-01-22 | 2016-08-10 | 重庆大唐国际武隆水电开发有限公司 | Axle bush temperature protection system of hydroelectric power plant |
Non-Patent Citations (1)
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| 唐亚波: "防止水电厂水机保护误动、拒动措施", 《办公室业务》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939591A (en) * | 2017-12-21 | 2018-04-20 | 四川大唐国际甘孜水电开发有限公司 | A kind of large and medium hydro-generator bearing bush temperature guard method |
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