CN103590858A - System and method for preventing rotating speed of turbine of power plant unit from being raised rapidly - Google Patents
System and method for preventing rotating speed of turbine of power plant unit from being raised rapidly Download PDFInfo
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- CN103590858A CN103590858A CN201310582946.9A CN201310582946A CN103590858A CN 103590858 A CN103590858 A CN 103590858A CN 201310582946 A CN201310582946 A CN 201310582946A CN 103590858 A CN103590858 A CN 103590858A
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Abstract
The invention discloses a system and method for preventing the rotating speed of a turbine of a power plant unit from being raised rapidly. The system comprises a rotating speed detection device and a control device, wherein the rotating speed detection device is used for detecting the current rotating speed of the turbine, the control device is connected with the rotating speed detection device and used for comparing the detected current rotating speed with a preset rotating speed, and the control device is further used for being connected with a switch device which communicates a power plant with a power grid so as to detect the state of the switch device and adjusting an initial load set value of the unit or the current rotating speed of the turbine according to the comparison result and the state of the switch device. Therefore, according to the system and the method, the problem that the rotating speed of the turbine is raised rapidly due to unreliability of grid-tied signals can be solved, and stability and safety of the power plant unit can be ensured.
Description
Technical field
The present invention relates to a kind of system and method that prevents that Power Plant turbine speed from ascending to heaven.
Background technique
In prior art, for the power generator turbine in power station, start the process of red switch, conventionally exist the turbine speed causing due to the unreliable and operator's misspecification of the grid-connected signal problem of ascending to heaven, and the generation of this problem can affect stability and the Security of Power Plant.
Summary of the invention
The object of this invention is to provide a kind of a kind of system and method that prevents that Power Plant turbine speed from ascending to heaven that prevents that Power Plant turbine speed from ascending to heaven, to solve in prior art the turbine speed problem of ascending to heaven.
To achieve these goals, the invention provides a kind of system that prevents that Power Plant turbine speed from ascending to heaven, this system comprises: speed detector, for detection of the current rotating speed of steam turbine; Control gear, be connected with described speed detector, for detected current rotating speed and desired speed are compared, this control gear also for the switch gear with connection power plant and electrical network be connected to detect this switch gear state, according to the state of comparative result and described switch gear, adjust the initial load setting value of described unit or the current rotating speed of described steam turbine.
According to a kind of mode of execution, described control gear, in the situation that described switch gear is closed state, described comparative result is that detected current rotating speed is less than described desired speed, is adjusted into 0MW by the initial load setting value of described unit.Preferably, described control gear is when adjusting the initial load setting value of described unit, and also the speed setting device of described steam turbine and the signal of power setting device locking are controlled in output.
According to a kind of mode of execution, described control gear is when adjusting the initial load setting value of described unit, and also the speed setting device of described steam turbine and the signal of power setting device locking are controlled in output.
According to a kind of mode of execution, described control gear, in the situation that described switch gear is off state, described comparative result is that detected current rotating speed is less than described desired speed, is 0rpm by the current adjustment of rotational speed of described steam turbine.
According to a kind of mode of execution, described control gear, in the situation that described switch gear is off state, described comparative result is that detected current rotating speed is more than or equal to described desired speed, is steam turbine rated speed by the current adjustment of rotational speed of described steam turbine.
The present invention also provides a kind of method that prevents power generator turbine speed fling lifting, and the method comprises: receive the current rotating speed of the steam turbine being detected by speed detector the state that detection is communicated with the switch gear of power plant and electrical network; And by detected current rotating speed and desired speed comparison, and adjust the initial load setting value of described unit or the current rotating speed of described steam turbine according to the state of comparative result and described switch gear.
According to a kind of mode of execution, in the situation that described switch gear is closed state, described comparative result, be that detected current rotating speed is less than described desired speed, the initial load setting value of described unit is adjusted into 0MW.Preferably, when adjusting the initial load setting value of described unit, also the speed setting device of described steam turbine and the signal of power setting device locking are controlled in output.
According to a kind of mode of execution, in the situation that described switch gear is off state, described comparative result, be that detected current rotating speed is less than described desired speed, by the current adjustment of rotational speed of described steam turbine, be 0rpm.
According to a kind of mode of execution, in the situation that described switch gear is off state, described comparative result, be that detected current rotating speed is more than or equal to described desired speed, by the current adjustment of rotational speed of described steam turbine, be steam turbine rated speed.
Pass through technique scheme, can adopt speed detector to detect the current rotating speed of steam turbine, adopt control gear that detected current rotating speed and desired speed are compared, and control gear is also connected to detect the state of this switch gear for the switch gear with being communicated with power plant and electrical network, according to the current rotating speed of steam turbine and the comparative result of desired speed and the state of described switch gear, adjust the initial load setting value of described unit or the current rotating speed of described steam turbine, avoid thus due to the unreliable caused turbine speed of the grid-connected signal problem of ascending to heaven, guarantee stability and the Security of Power Plant.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Accompanying drawing explanation
Accompanying drawing is to be used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the skeleton diagram that prevents the system that Power Plant turbine speed is ascended to heaven according to the embodiment of the present invention; And
Fig. 2 is the flow chart that prevents the method that Power Plant turbine speed is ascended to heaven according to the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
Fig. 1 is the skeleton diagram that prevents the system that Power Plant turbine speed is ascended to heaven according to the embodiment of the present invention.
As shown in Figure 1, the system that prevents that Power Plant turbine speed from ascending to heaven provided by the invention comprises: speed detector 10, for detection of the current rotating speed of steam turbine; Control gear 12, be connected with described speed detector 10, for current rotating speed and the desired speed of detected steam turbine are compared, this control gear also for the switch gear (not shown) with connection power plant and electrical network be connected to detect this switch gear state, according to the current rotating speed of steam turbine and the comparative result of desired speed and the state of described switch gear, adjust the initial load setting value of described unit or the current rotating speed of described steam turbine.
Wherein, described speed detector 10 can adopt speed probe, and the switch gear of described connection power plant and electrical network can adopt circuit breaker, and for example, in the present invention, this switch gear can be unit booster stations 500KV circuit breaker.In addition, can in control gear 12, set in advance described desired speed, this desired speed can arrange according to the actual steam turbine type in power plant, for example, can be set to 2700rpm, and the present invention does not specifically limit it.
According to technological scheme of the present invention, can be by adopting speed detector 10 to detect the current rotating speed of steam turbine, adopt control gear 12 that detected current rotating speed and desired speed are compared, and control gear 12 is also connected to detect the state of this switch gear for the switch gear with being communicated with power plant and electrical network, according to the state of comparative result and described switch gear, adjust the initial load setting value of described unit or the current rotating speed of described steam turbine, can avoid thus due to the unreliable caused turbine speed of the grid-connected signal problem of ascending to heaven, guarantee stability and the Security of Power Plant.
In embodiments of the present invention, the state of the switch gear of connection power plant and electrical network comprises closed state and off state.When the state of described switch gear is closed state, there is the grid-connected signal that represents that power plant is communicated with electrical network, i.e. electric cyclization; When the state of described switch gear is off state, there is not grid-connected signal, i.e. electric unlinking.
According to an embodiment of the present, described control gear 12, in the situation that described switch gear is closed state, described comparative result is that detected current rotating speed is less than described desired speed, is adjusted into 0MW by the initial load setting value of described unit.Like this, can switching power power plant and the switch gear of electrical network cause Steam Turbine Over-speed Accident when closed.
Preferably, described control gear 12 is when adjusting the initial load setting value (the initial load setting value of described unit is adjusted into 0MW) of described unit, and also the speed setting device of described steam turbine and the signal of power setting device locking are controlled in output.
Thus, by making speed setting device and the locking of power setting device of steam turbine, even if operator operate speed setting device and power setting device, also cannot set rotating speed and power, thereby (the Steam Turbine Over-speed Accident situation that for example misoperation causes can be: when the switch gear that is communicated with power plant and electrical network is closed state in load control mode can to avoid the Steam Turbine Over-speed Accident that operator's misoperation causes, it is for example desired value of 500rpm that operator want speed setting, but because load is that load value is set under control mode, make operator be actually load value is set as to 500MW/min the setting of rotating speed, thereby the hypervelocity that has caused steam turbine).
In addition, in the situation that described switch gear is closed state, described comparative result is that detected current rotating speed is more than or equal to described desired speed, described control gear 12 is for being adjusted into 15MW by the initial load setting value of described unit.
According to an embodiment of the present, described control gear 12, in the situation that described switch gear is off state, described comparative result is that detected current rotating speed is less than described desired speed, is 0rpm by the current adjustment of rotational speed of described steam turbine.Thus, can switching power power plant and the switch gear of electrical network cause Steam Turbine Over-speed Accident while disconnecting.
In addition, described control gear 12 is in the situation that described switch gear is off state, described comparative result is that detected current rotating speed is more than or equal to described desired speed, by the current adjustment of rotational speed of described steam turbine, be that steam turbine rated speed is (to guarantee " island " operation, " island " refers to that power generator is to generating electricity in the ，Dui power plant that do not generate electricity outside power plant; " island " operates to the common practise in art technology, do not repeat them here).
Wherein, steam turbine rated speed can be for example 3000rpm, and those skilled in the art can determine its rated speed according to the particular type of steam turbine, and the present invention does not specifically limit it.
Fig. 2 is the flow chart that prevents the method that Power Plant turbine speed is ascended to heaven according to the embodiment of the present invention.
As shown in Figure 2, the method that prevents that Power Plant turbine speed from ascending to heaven provided by the invention comprises:
S200, receives the current rotating speed of the steam turbine being detected by speed detector the state that detection is communicated with the switch gear of power plant and electrical network; And
S202, by detected current rotating speed and desired speed comparison, and adjusts the initial load setting value of described unit or the current rotating speed of described steam turbine according to the state of comparative result and described switch gear.
Wherein, the switch gear of described connection power plant and electrical network can adopt circuit breaker, and for example, in the present invention, this switch gear can be unit booster stations 500KV circuit breaker.Desired speed can arrange according to the actual steam turbine type in power plant, for example, can be set to 2700rpm, and the present invention does not specifically limit it.
According to technological scheme of the present invention, can be by receiving the current rotating speed of the steam turbine being detected by speed detector the state that detection is communicated with the switch gear of power plant and electrical network, detected current rotating speed and desired speed are compared, according to the state of comparative result and described switch gear, adjust the initial load setting value of described unit or the current rotating speed of described steam turbine, can avoid thus, due to the unreliable caused turbine speed of the grid-connected signal problem of ascending to heaven, guaranteeing stability and the Security of Power Plant.
In embodiments of the present invention, the state of the switch gear of connection power plant and electrical network can comprise closed state and off state.When the state of described switch gear is closed state, there is the grid-connected signal that represents that power plant is communicated with electrical network, i.e. electric cyclization; When the state of described switch gear is off state, there is not grid-connected signal, i.e. electric unlinking.
In step S202, in the situation that described switch gear is closed state, described comparative result, be that detected current rotating speed is less than described desired speed, the initial load setting value of described unit is adjusted into 0MW.Like this, can switching power power plant and the switch gear of electrical network cause Steam Turbine Over-speed Accident when closed.
Preferably, when adjusting the initial load setting value (the initial load setting value of described unit is adjusted into 0MW) of described unit, also the speed setting device of described steam turbine and the signal of power setting device locking are controlled in output.
Thus, by making speed setting device and the locking of power setting device of steam turbine, even if operator operate speed setting device and power setting device, also cannot set rotating speed and power, thereby (the Steam Turbine Over-speed Accident situation that for example misoperation causes can be: when the switch gear that is communicated with power plant and electrical network is closed state in load control mode can to avoid the Steam Turbine Over-speed Accident that operator's misoperation causes, it is for example desired value of 500rpm that operator want speed setting, but because load is that load value is set under control mode, make operator be actually load value is set as to 500MW/min the setting of rotating speed, thereby the hypervelocity that has caused steam turbine).
In addition,, in the situation that described switch gear is closed state, described comparative result is that detected current rotating speed is more than or equal to described desired speed, the initial load setting value of described unit is adjusted into 15MW.
In step S202, in the situation that described switch gear is off state, described comparative result, be that detected current rotating speed is less than described desired speed, by the current adjustment of rotational speed of described steam turbine, be 0rpm.Thus, can switching power power plant and the switch gear of electrical network cause Steam Turbine Over-speed Accident while disconnecting.
In addition, in the situation that described switch gear is off state, described comparative result, be that detected current rotating speed is more than or equal to described desired speed, by the current adjustment of rotational speed of described steam turbine, be that steam turbine rated speed is (to guarantee " island " operation, " island " refers to that power generator is to generating electricity in the ，Dui power plant that do not generate electricity outside power plant; " island " operates to the common practise in art technology, do not repeat them here).
Wherein, steam turbine rated speed can be for example 3000rpm, and those skilled in the art can determine its rated speed according to the particular type of steam turbine, and the present invention does not specifically limit it.
From above-described embodiment, can find out, can adopt speed detector to detect the current rotating speed of steam turbine, adopt control gear that detected current rotating speed and desired speed are compared, and control gear is also connected to detect the state of this switch gear for the switch gear with being communicated with power plant and electrical network, according to the state of comparative result and described switch gear, adjust the initial load setting value of described unit or the current rotating speed of described steam turbine, can avoid thus due to the unreliable caused turbine speed of the grid-connected signal problem of ascending to heaven, guarantee stability and the Security of Power Plant.
Below describe by reference to the accompanying drawings the preferred embodiment of the present invention in detail; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode.For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible compound modes.
In addition, between various mode of execution of the present invention, also can carry out combination in any, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. prevent the system that Power Plant turbine speed is ascended to heaven, wherein, this system comprises:
Speed detector, for detection of the current rotating speed of steam turbine;
Control gear, be connected with described speed detector, for detected current rotating speed and desired speed are compared, this control gear also for the switch gear with connection power plant and electrical network be connected to detect this switch gear state, according to the state of comparative result and described switch gear, adjust the initial load setting value of described unit or the current rotating speed of described steam turbine.
2. system according to claim 1, wherein, described control gear, in the situation that described switch gear is closed state, described comparative result is that detected current rotating speed is less than described desired speed, is adjusted into 0MW by the initial load setting value of described unit.
3. system according to claim 2, wherein, described control gear is when adjusting the initial load setting value of described unit, and also the speed setting device of described steam turbine and the signal of power setting device locking are controlled in output.
4. system according to claim 1, wherein, described control gear, in the situation that described switch gear is off state, described comparative result is that detected current rotating speed is less than described desired speed, is 0rpm by the current adjustment of rotational speed of described steam turbine.
5. system according to claim 1, wherein, described control gear, in the situation that described switch gear is off state, described comparative result is that detected current rotating speed is more than or equal to described desired speed, is steam turbine rated speed by the current adjustment of rotational speed of described steam turbine.
6. prevent a method for power generator turbine speed fling lifting, wherein, the method comprises:
The current rotating speed of the steam turbine that reception is detected by speed detector detection are communicated with the state of the switch gear of power plant and electrical network; And
By detected current rotating speed and desired speed comparison, and adjust the initial load setting value of described unit or the current rotating speed of described steam turbine according to the state of comparative result and described switch gear.
7. method according to claim 6, wherein, is that detected current rotating speed is less than described desired speed in the situation that described switch gear is closed state, described comparative result, and the initial load setting value of described unit is adjusted into 0MW.
8. method according to claim 7, wherein, when adjusting the initial load setting value of described unit, also exports and controls the speed setting device of described steam turbine and the signal of power setting device locking.
9. method according to claim 6, wherein, is that detected current rotating speed is less than described desired speed in the situation that described switch gear is off state, described comparative result, by the current adjustment of rotational speed of described steam turbine, is 0rpm.
10. method according to claim 6, wherein, in the situation that described switch gear is off state, described comparative result, being that detected current rotating speed is more than or equal to described desired speed, is steam turbine rated speed by the current adjustment of rotational speed of described steam turbine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310582946.9A CN103590858B (en) | 2013-11-19 | 2013-11-19 | Prevent the system and method that Power Plant turbine speed is ascended to heaven |
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| CN201310582946.9A CN103590858B (en) | 2013-11-19 | 2013-11-19 | Prevent the system and method that Power Plant turbine speed is ascended to heaven |
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| CN103590858A true CN103590858A (en) | 2014-02-19 |
| CN103590858B CN103590858B (en) | 2015-12-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500151A (en) * | 2014-12-08 | 2015-04-08 | 中广核工程有限公司 | Load control method and system for adjustment of steam turbine of nuclear power station |
| CN109415949A (en) * | 2016-07-08 | 2019-03-01 | 通用电器技术有限公司 | Turbine trip speed and acceleration restrictor |
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| JPS63120804A (en) * | 1986-11-11 | 1988-05-25 | Toshiba Corp | Helper motor system |
| US5234315A (en) * | 1991-03-19 | 1993-08-10 | Hitachi, Ltd. | Apparatus for preventing a turbine from exceeding revolution speed |
| CN102536349A (en) * | 2010-12-17 | 2012-07-04 | 阿尔斯通技术有限公司 | Steam turbine overspeed protection method and system |
| CN103075206A (en) * | 2013-01-24 | 2013-05-01 | 广东电网公司电力调度控制中心 | Thermal power unit overspeed protection method based on controlling of safety automatic device |
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2013
- 2013-11-19 CN CN201310582946.9A patent/CN103590858B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63120804A (en) * | 1986-11-11 | 1988-05-25 | Toshiba Corp | Helper motor system |
| US5234315A (en) * | 1991-03-19 | 1993-08-10 | Hitachi, Ltd. | Apparatus for preventing a turbine from exceeding revolution speed |
| CN102536349A (en) * | 2010-12-17 | 2012-07-04 | 阿尔斯通技术有限公司 | Steam turbine overspeed protection method and system |
| CN103075206A (en) * | 2013-01-24 | 2013-05-01 | 广东电网公司电力调度控制中心 | Thermal power unit overspeed protection method based on controlling of safety automatic device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500151A (en) * | 2014-12-08 | 2015-04-08 | 中广核工程有限公司 | Load control method and system for adjustment of steam turbine of nuclear power station |
| CN104500151B (en) * | 2014-12-08 | 2016-05-11 | 中广核工程有限公司 | Duty control method and system during steam turbine for nuclear power station regulates |
| CN109415949A (en) * | 2016-07-08 | 2019-03-01 | 通用电器技术有限公司 | Turbine trip speed and acceleration restrictor |
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| Publication number | Publication date |
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| CN103590858B (en) | 2015-12-02 |
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