CN104654267A - Gas thermal power plant two-driving-one unit low-pressure steam system and on-off control method thereof - Google Patents
Gas thermal power plant two-driving-one unit low-pressure steam system and on-off control method thereof Download PDFInfo
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- CN104654267A CN104654267A CN201510081291.6A CN201510081291A CN104654267A CN 104654267 A CN104654267 A CN 104654267A CN 201510081291 A CN201510081291 A CN 201510081291A CN 104654267 A CN104654267 A CN 104654267A
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Abstract
The invention provides a gas thermal power plant two-driving-one unit low-pressure steam system and an on-off control method thereof. The gas thermal power plant two-driving-one unit low-pressure steam system comprises a first low-pressure steam system, a second low-pressure steam system and a steam turbine low-pressure cylinder; the first low-pressure steam system comprises a first low-pressure steam pipeline, a first low-pressure steam combination electrically operated gate, a first low-pressure steam combination bypass electrically operated gate, a first low-pressure bypass control valve, a first low bypass de-superheating water pipeline, a first low bypass de-superheating water regulating valve and a first low bypass de-superheating water electric valve; the second low-pressure steam system comprises a second low-pressure steam system pipeline, a second low-pressure steam combination electrically operated gate, a second low-pressure steam combination bypass electrically operated gate, a second low-pressure bypass control valve, a second low bypass de-superheating water pipeline, a second low bypass de-superheating water regulating valve and a second low bypass de-superheating water electric valve. By utilizing the gas thermal power plant two-driving-one unit low-pressure steam system and the on-off control method thereof, automatic feeding can be realized under the exit status of the low-pressure steam system of this side; the automatic exit or automatic steam combination of the low-pressure steam system of this side is realized under the feed state.
Description
Technical field
The invention relates to gas power station low-pressure steam technology, particularly drag a unit steam vapour system and on off control method thereof about a kind of gas power station two.
Background technology
The major function of gas power station steam vapour system is that conducting waste heat boiler low-pressure drum carrys out vapour and goes turbine low pressure cylinder to do work, but existing gas power station steam vapour system when steam turbine trips, cannot play the effect of pressure release low-pressure steam.Uncontrollable low-pressure steam, when steam turbine load is specified lower than 30%, by low voltage bypass Stress control valve regulation pressure, enters condenser; And uncontrollable when steam turbine load is specified higher than 30%, enter turbine low pressure cylinder acting.In addition, existing gas power station steam vapour system under this side steam vapour system exit status, cannot realize the automatic input of this side steam vapour system; Under input state, automatically exiting of this side steam vapour system cannot be realized; And under opposite side steam vapour system input state, the automatic of this side steam vapour system cannot be realized and vapour.
Summary of the invention
Embodiments provide a kind of gas power station two and drag a unit steam vapour system and on off control method thereof, with under this side steam vapour system exit status, realize the automatic input of this side steam vapour system; Under input state, realize automatically exiting of this side steam vapour system; Under opposite side steam vapour system input state, realize the automatic of this side steam vapour system and vapour.
To achieve these goals, embodiments provide a kind of gas power station two and drag a unit steam vapour system, described gas power station two drags a unit steam vapour system to comprise: the first steam vapour system, the second steam vapour system and turbine low pressure cylinder;
First steam vapour system comprises: the first low-pressure steam pipeline, the first low-pressure steam vapour Electrically operated gate, the first low-pressure steam vapour bypass Electrically operated gate, the first low voltage bypass control valve, the first low other desuperheating water pipeline, the first low other desuperheating water adjust valve and the first low other desuperheating water motor-driven valve;
Second steam vapour system comprises: the second low-pressure steam pipeline, the second low-pressure steam vapour Electrically operated gate, the second low-pressure steam vapour bypass Electrically operated gate, the second low voltage bypass control valve, the second low other desuperheating water pipeline, the second low other desuperheating water adjust valve and the second low other desuperheating water motor-driven valve;
Described first low-pressure steam vapour Electrically operated gate is arranged on the first low-pressure steam pipeline, the first low-pressure steam the two ends of vapour bypass Electrically operated gate are connected to the first low-pressure steam and the two ends of vapour Electrically operated gate; Described first low-pressure steam pipeline one end connects turbine low pressure cylinder, and the other end receives from the first waste heat boiler low-pressure steam; One end of described first low other desuperheating water pipeline is connected to described first low-pressure steam by described first low voltage bypass control valve and on described first low-pressure steam pipeline between vapour Electrically operated gate and the first waste heat pot, the other end connects condensate system;
Described second low-pressure steam vapour Electrically operated gate is arranged on described second low-pressure steam pipeline, described second low-pressure steam the two ends of vapour bypass Electrically operated gate are connected to the two ends of described second low-pressure steam vapour Electrically operated gate; Described second low-pressure steam pipeline one end connects turbine low pressure cylinder, and the other end receives from the second waste heat boiler low-pressure steam; One end of described second low other desuperheating water pipeline is connected to described second low-pressure steam by described second low voltage bypass control valve and on the second low-pressure steam pipeline between vapour Electrically operated gate and the second waste heat pot, the other end connects described condensate system.
In one embodiment, described gas power station two drags in a unit steam vapour system and is also provided with: the first steam vapour system programed logic action button and the second steam vapour system programed logic action button.
To achieve these goals, embodiments provide a kind of on off control method, be applied to above-mentioned gas power station two and drag a unit steam vapour system, described on off control method comprises:
Judge whether the first steam vapour system has dropped into automatic position;
If the first steam vapour system has dropped into automatic position,
Judge whether that the second steam vapour system does not drop into and the second low-pressure steam vapour Electrically operated gate and the second low-pressure steam vapour bypass Electrically operated gate are closed, or whether the second low-pressure steam vapour Electrically operated gate opened and the second waste heat boiler in operation, or the first low-pressure steam vapour Electrically operated gate are opened;
If the second steam vapour system does not drop into and the second low-pressure steam vapour Electrically operated gate and the second low-pressure steam vapour bypass Electrically operated gate are closed, or second low-pressure steam vapour Electrically operated gate opened and the second waste heat boiler in operation, or first low-pressure steam vapour Electrically operated gate open, judge whether at least to meet one of following three conditions:
A1: the second low pressure vapour Electrically operated gate has opened and the second waste heat boiler runs;
First waste heat boiler has run and the first low-pressure steam the absolute value of pressure difference value before and after vapour Electrically operated gate is less than a predetermined pressure, and the first low-pressure steam the absolute value of temperature gap before and after vapour motor-driven valve is less than a predetermined temperature;
First, second combustion engine load deviation is less than predetermined load;
A2: or the first low-pressure steam vapour Electrically operated gate are opened;
A3: or the second low-pressure steam vapour Electrically operated gate and the second low-pressure steam vapour bypass Electrically operated gate are closed.
One of A1, A2 and A3 or multiple if satisfied condition, judge the first low-pressure steam and whether vapour bypass Electrically operated gate is opened; If the first low-pressure steam vapour bypass Electrically operated gate are not opened, send out the first low-pressure steam and the instruction of vapour bypass Electrically operated gate;
If the first low-pressure steam vapour bypass Electrically operated gate are opened, judge the first low-pressure steam and whether vapour Electrically operated gate is opened, if described first low-pressure steam vapour Electrically operated gate are not opened, send out the first low-pressure steam and the instruction of vapour Electrically operated gate;
If the first low-pressure steam vapour Electrically operated gate are opened, judge the first low-pressure steam and whether vapour bypass Electrically operated gate closes; If the first low-pressure steam vapour bypass Electrically operated gate are not closed, send pass first low-pressure steam and the instruction of vapour bypass Electrically operated gate.
In one embodiment, described on off control method also comprises:
Judge whether that the first waste heat boiler has moved back and time delay one scheduled time, or the first low lateral pressure control valve is in automatic position;
If the first waste heat boiler has moved back and time delay one scheduled time, or the first low lateral pressure control valve is in automatic position, judges whether the first low-pressure steam and vapour Electrically operated gate has been closed and the first low-pressure steam vapour bypass Electrically operated gate are closed; If not, pass first low-pressure steam is sent and vapour Electrically operated gate and the first low-pressure steam the instruction of vapour bypass Electrically operated gate.
The beneficial effect of the embodiment of the present invention is, by the present invention, under this side steam vapour system exit status, can realize the automatic input of this side steam vapour system; Under input state, realize automatically exiting of this side steam vapour system; Under opposite side steam vapour system input state, realize the automatic of this side steam vapour system and vapour.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation that the gas power station two of the embodiment of the present invention drags a unit steam vapour system;
Fig. 2 is the on off control method flow diagram of one embodiment of the invention;
Fig. 3 is the on off control method flow diagram of another embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of gas power station two to drag a unit steam vapour system, as shown in Figure 1, this gas power station two drags a unit steam vapour system to comprise: #1 steam vapour system, #2 steam vapour system and turbine low pressure cylinder 11, #1 steam vapour system is connected to turbine low pressure cylinder 11, #2 steam vapour system by #1 low-pressure steam pipeline 12 and is connected to turbine low pressure cylinder 11 by #2 low-pressure steam pipeline 13.
#1 steam vapour system comprises: #1 low-pressure steam pipeline 12, #1 low-pressure steam vapour Electrically operated gate 4, #1 low-pressure steam the low other desuperheating water pipeline 14 of vapour bypass Electrically operated gate 5, low voltage bypass control valve 1, Desuperheating device 15, #1, the low other desuperheating water of #1 adjust valve 2 and the low other desuperheating water motor-driven valve 3 of #1.
#1 low-pressure steam pipeline 12 one end connects turbine low pressure cylinder 11, and the other end receives from #1 waste heat boiler low-pressure steam; #1 low-pressure steam vapour Electrically operated gate 4 is arranged on #1 low-pressure steam pipeline 12, #1 low-pressure steam the two ends of vapour bypass Electrically operated gate 5 are connected to #1 low-pressure steam and the two ends of vapour Electrically operated gate 4; One end of the low other desuperheating water pipeline 14 of #1 is connected to #1 low-pressure steam by Desuperheating device 15 and low voltage bypass control valve 1 and on #1 low-pressure steam pipeline 12 between vapour Electrically operated gate 4 and #1 waste heat pot, the other end connects condensate system.Low voltage bypass control valve 1 is for decompression, and the effect of Desuperheating device 15 is desuperheats, and low voltage bypass control valve 1 and Desuperheating device 15 integrally, are called reducing-and-cooling plant.In addition, Desuperheating device 15 is connected to condenser by condenser branch road 16.
The water of condensate system adjusts valve 2, Desuperheating device 15 and low voltage bypass control valve 1 to enter #1 low-pressure steam pipeline 12 through the low other desuperheating water motor-driven valve 3 of #1, #1 low side desuperheating water successively.
#2 steam vapour system comprises: #2 low-pressure steam pipeline 13, #2 low-pressure steam vapour Electrically operated gate 9, #2 low-pressure steam the low other desuperheating water pipeline 18 of vapour bypass Electrically operated gate 10, low voltage bypass control valve 6, Desuperheating device 17, #2, the low other desuperheating water of #2 adjust valve 7 and the low other desuperheating water motor-driven valve 8 of #2.
#2 low-pressure steam pipeline 13 one end connects turbine low pressure cylinder 11, and the other end receives from #2 waste heat boiler low-pressure steam; #2 low-pressure steam vapour Electrically operated gate 9 is arranged on #2 low-pressure steam pipeline 13, #2 low-pressure steam the two ends of vapour bypass Electrically operated gate 10 are connected to #2 low-pressure steam and the two ends of vapour Electrically operated gate 9; One end of the low other desuperheating water pipeline 18 of #2 is connected to #2 low-pressure steam by Desuperheating device 17 and low voltage bypass control valve 6 and on #2 low-pressure steam pipeline 13 between vapour Electrically operated gate 9 and #2 waste heat pot, the other end connects condensate system.Desuperheating device 17 is connected to condenser by condenser branch road 19.
The water of condensate system adjusts valve 7, Desuperheating device 17 and low voltage bypass control valve 6 to enter #2 low-pressure steam pipeline 13 through the low other desuperheating water motor-driven valve 8 of #2, #2 low side desuperheating water successively.
Gas power station two of the present invention drags in a unit steam vapour system and is also provided with two artificial action buttons: #1 steam vapour system programed logic action button a1 and #2 steam vapour system programed logic action button a2.
Gas power station two of the present invention drags a unit steam vapour system except by except above-mentioned low-pressure steam pipeline, valve, also comprises relevant thermal technology's measuring point (as the multiple pressure-measuring-point in figure and temperature point).Low-pressure steam pipeline (comprising #1 low-pressure steam pipeline 12 and #2 low-pressure steam pipeline 13) is the connecting pipe between waste heat boiler low-pressure drum and turbine low pressure cylinder 11, plays the effect of transport low-pressure steam.The effect of low-pressure steam vapour Electrically operated gate (#1 low-pressure steam vapour Electrically operated gate 4 and #2 low-pressure steam vapour Electrically operated gate 9) is that isolation waste heat boiler low-pressure steam removes turbine low pressure cylinder.The effect of low-pressure steam vapour bypass Electrically operated gate (#1 low-pressure steam vapour bypass Electrically operated gate 5 and #2 low-pressure steam vapour bypass Electrically operated gate 10) is balance and pressure reduction before and after vapour Electrically operated gate.The effect of low voltage bypass Steam pressure control valve (#1 high lateral pressure control valve 1 and the low lateral pressure control valve 6 of #2) regulates low pressure main steam line pressure, low-pressure steam parameter is controlled by this pressure-control valve before turbine low pressure cylinder admission, when steam turbine trips, this pressure-control valve can also play the effect of pressure release low-pressure steam.The overheated main steam of low-pressure drum is through low-pressure steam and vapour Electrically operated gate enters turbine low pressure cylinder 11 does work, and low pressure (LP) cylinder steam discharge directly enters condenser; Low-pressure steam, when steam turbine load is specified lower than 30%, by low voltage bypass Stress control valve regulation pressure, enters condenser; When steam turbine load is specified higher than 30%, enter turbine low pressure cylinder acting.
The embodiment of the present invention provides a kind of on off control method, and be applied to the gas power station two shown in Fig. 1 and drag a unit steam vapour system, this on off control method comprises: setting up procedure, and as shown in Figure 2, this setting up procedure comprises:
S201: judge whether the first steam vapour system has dropped into automatic position; If the first steam vapour system has dropped into automatic position, enter S202.
S202: judge whether that the second steam vapour system does not drop into and the second low-pressure steam vapour Electrically operated gate and the second low-pressure steam vapour bypass Electrically operated gate are closed; Or whether the second low-pressure steam vapour Electrically operated gate opened and the second waste heat boiler in operation; Or the first low-pressure steam vapour Electrically operated gate are opened.If the second steam vapour system does not drop into and the second low-pressure steam vapour Electrically operated gate and the second low-pressure steam vapour bypass Electrically operated gate are closed, or second low-pressure steam vapour Electrically operated gate opened and the second waste heat boiler in operation, or first low-pressure steam vapour Electrically operated gate open, carry out S203.
It should be noted that, the first waste heat boiler is the Electrically operated gate be connected with the first steam vapour system, and the second waste heat boiler is the Electrically operated gate be connected with the second steam vapour system.First, second in description is not intended to limit sequencing and actual numbering, and such as the first steam vapour system is not #1 steam vapour system, and also can represent the second low-pressure system, namely first can be #1, also can be #2.In the present embodiment, for convenience of description, represent #1 with first, second represents #2.
S203: judge whether at least to meet one of following three conditions:
A1: the second low pressure vapour Electrically operated gate has opened and the second waste heat boiler runs;
And the first waste heat boiler has run and the first low-pressure steam the absolute value of pressure difference value before and after vapour Electrically operated gate is less than a predetermined pressure, and the first low-pressure steam the absolute value of temperature gap before and after vapour motor-driven valve is less than a predetermined temperature;
And first, second combustion engine load deviation is less than predetermined load;
A2: the first low-pressure steam vapour Electrically operated gate are opened;
A3: the second low-pressure steam vapour Electrically operated gate and the second low-pressure steam vapour bypass Electrically operated gate are closed.
In one embodiment, this predetermined pressure is 0.05MPa, and this predetermined temperature is 60 DEG C, and the present invention is not as limit.In one embodiment, this predetermined load is 20MW.
One of A1, A2 and A3 three conditions or meet multiple if satisfied condition, carry out S204.
S204: judge the first low-pressure steam and whether vapour bypass Electrically operated gate is opened.If the first low-pressure steam vapour bypass Electrically operated gate are opened, carry out S206; Otherwise, carry out S205, send out the first low-pressure steam and the instruction of vapour bypass Electrically operated gate.
S206: judge the first low-pressure steam and whether vapour Electrically operated gate is opened.If the first low-pressure steam vapour Electrically operated gate are opened, carry out S208; Otherwise, carry out S207, send out the first low-pressure steam and the instruction of vapour Electrically operated gate.
S208: judge the first low-pressure steam and whether vapour bypass Electrically operated gate closes.If the first low-pressure steam vapour bypass Electrically operated gate are closed, setting up procedure terminates; Otherwise, carry out S209, send pass first low-pressure steam and the instruction of vapour bypass Electrically operated gate.
In S202, judge that two drag a unit under three kinds of ruuning situation, the automatic input logic of steam vapour system can be continued: 1. the second steam vapour system (#2 steam vapour system) is program control does not drop into and the second low-pressure steam vapour Electrically operated gate (#2 low-pressure steam vapour Electrically operated gate) are closed and the second low-pressure steam vapour bypass Electrically operated gate are closed; 2. #2 low-pressure steam vapour Electrically operated gate opened and #2 waste heat boiler in operation; 3. #1 low-pressure steam vapour Electrically operated gate are opened.
In S203, when the second steam vapour system (#2 steam vapour system) under normal operation, continue the first steam vapour system (#1 steam vapour system) and steam-operating makes the following condition of demand fulfillment: 1. #2 low pressure main steam vapour Electrically operated gate has opened and #2 waste heat boiler runs; And 2. #1 waste heat boiler run and before #1 low pressure main steam pressure vapour motor-driven valve with valve after the absolute value of pressure difference value be less than 0.05MPa and #1 low pressure main steam temperature and before vapour motor-driven valve with valve after the absolute value of temperature gap be less than 60 DEG C; And 3. #1, #2 combustion engine load deviation is less than 20MW.
S204 to S208 completes the also vapour process of side steam vapour system, namely first opens and vapour bypass Electrically operated gate, then opens and vapour Electrically operated gate; Treat that also vapour Electrically operated gate is opened, then close and vapour bypass Electrically operated gate.
By the flow process shown in Fig. 2, the automatic input of this gas power station steam vapour system under system exit status can be realized.
The embodiment of the present invention also provides a kind of on off control method, and be applied to the gas power station two shown in Fig. 1 and drag a unit steam vapour system, this on off control method comprises: stop step, as shown in Figure 3, this stopping step comprising:
S301: judge whether that the first waste heat boiler has moved back and time delay one scheduled time, or the first low lateral pressure control valve is in automatic position; If the first waste heat boiler has moved back and time delay one scheduled time, or the first low lateral pressure control valve is in automatic position, carries out S302.In one embodiment, this scheduled time is 30min, and the present invention is not as limit.
S302: judge whether the first low-pressure steam and vapour Electrically operated gate has been closed and the first low-pressure steam vapour bypass Electrically operated gate are closed.If the first low-pressure steam vapour Electrically operated gate have been closed and the first low-pressure steam vapour bypass Electrically operated gate are closed, step has been stopped terminating.Otherwise, if the first low-pressure steam vapour Electrically operated gate are not closed, or first low-pressure steam vapour bypass Electrically operated gate do not close, or first low-pressure steam vapour Electrically operated gate and the first low-pressure steam vapour bypass Electrically operated gate all do not close, carry out S303, send pass first low-pressure steam and vapour Electrically operated gate and the first low-pressure steam the instruction of vapour bypass Electrically operated gate.
On off control method of the present invention (on off control logic) possesses protection exit function: when there is low-pressure steam and vapour Electrically operated gate pass or combustion engine trip during two kinds of situations, then ongoing steam vapour system programed logic can exit immediately.
When gas power station steam vapour system programed logic moves to a certain step, if condition does not meet, single for judge that this condition can be ignored, manually can carry out the operation that leapfrog action continues control logic, until institute is complete in steps.
In S301, below judging two kinds in situation, just can exit #1 steam vapour system: 1. #1 waste heat boiler is out of service, time delay 30min; Or 2. the low other steam control valve of #1 in automatic position.
On off control method shown in Fig. 3, achieves this gas power station steam vapour system automatically exiting under input state.
Gas power station two of the present invention drags the programed logic of a unit steam vapour system to proceed to a certain step, and when not receiving due feedback signal, programed logic can rest on this step, waits for manual operation.Power plant operations staff can find the unreceived feedback signal of current operation step sequence, artificially judges whether unreceived feedback signal affects the continuation execution of programed logic.If this feedback signal does not affect proceeding of present procedure control logic, operations staff can operate the execution that leapfrog action continues programed logic; If this feedback signal affects proceeding of present procedure control logic, then operations staff according to each the unsatisfied feedback signal found, can go investigation problem targetedly, until receive this feedback signal, continues performing a programme control logic.
By the present invention, under this side steam vapour system exit status, the automatic input of this side steam vapour system can be realized; Under input state, realize automatically exiting of this side steam vapour system; Under opposite side steam vapour system input state, realize the automatic of this side steam vapour system and vapour.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Apply specific embodiment in the present invention to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping; Meanwhile, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (4)
1. gas power station two drags a unit steam vapour system, it is characterized in that, described gas power station two drags a unit steam vapour system to comprise: the first steam vapour system, the second steam vapour system and turbine low pressure cylinder;
First steam vapour system comprises: the first low-pressure steam pipeline, the first low-pressure steam vapour Electrically operated gate, the first low-pressure steam vapour bypass Electrically operated gate, the first low voltage bypass control valve, the first low other desuperheating water pipeline, the first low other desuperheating water adjust valve and the first low other desuperheating water motor-driven valve;
Second steam vapour system comprises: the second low-pressure steam pipeline, the second low-pressure steam vapour Electrically operated gate, the second low-pressure steam vapour bypass Electrically operated gate, the second low voltage bypass control valve, the second low other desuperheating water pipeline, the second low other desuperheating water adjust valve and the second low other desuperheating water motor-driven valve;
Described first low-pressure steam vapour Electrically operated gate is arranged on the first low-pressure steam pipeline, the first low-pressure steam the two ends of vapour bypass Electrically operated gate are connected to the first low-pressure steam and the two ends of vapour Electrically operated gate; Described first low-pressure steam pipeline one end connects turbine low pressure cylinder, and the other end receives from the first waste heat boiler low-pressure steam; One end of described first low other desuperheating water pipeline is connected to described first low-pressure steam by described first low voltage bypass control valve and on described first low-pressure steam pipeline between vapour Electrically operated gate and the first waste heat pot, the other end connects condensate system;
Described second low-pressure steam vapour Electrically operated gate is arranged on described second low-pressure steam pipeline, described second low-pressure steam the two ends of vapour bypass Electrically operated gate are connected to the two ends of described second low-pressure steam vapour Electrically operated gate; Described second low-pressure steam pipeline one end connects turbine low pressure cylinder, and the other end receives from the second waste heat boiler low-pressure steam; One end of described second low other desuperheating water pipeline is connected to described second low-pressure steam by described second low voltage bypass control valve and on the second low-pressure steam pipeline between vapour Electrically operated gate and the second waste heat pot, the other end connects described condensate system.
2. gas power station two according to claim 1 drags a unit steam vapour system, it is characterized in that, described gas power station two drags in a unit steam vapour system and is also provided with: the first steam vapour system programed logic action button and the second steam vapour system programed logic action button.
3. an on off control method, be applied to gas power station two according to claim 1 and drag a unit steam vapour system, it is characterized in that, described on off control method comprises:
Judge whether the first steam vapour system has dropped into automatic position;
If the first steam vapour system has dropped into automatic position, judge whether that the second steam vapour system does not drop into and the second low-pressure steam vapour Electrically operated gate and the second low-pressure steam vapour bypass Electrically operated gate are closed, or whether the second low-pressure steam vapour Electrically operated gate opened and the second waste heat boiler in operation, or the first low-pressure steam vapour Electrically operated gate are opened;
If the second steam vapour system does not drop into and the second low-pressure steam vapour Electrically operated gate and the second low-pressure steam vapour bypass Electrically operated gate are closed, or second low-pressure steam vapour Electrically operated gate opened and the second waste heat boiler in operation, or first low-pressure steam vapour Electrically operated gate open, judge whether at least to meet one of following three conditions:
A1: the second low pressure vapour Electrically operated gate has opened and the second waste heat boiler runs;
And the first waste heat boiler has run and the first low-pressure steam the absolute value of pressure difference value before and after vapour Electrically operated gate is less than a predetermined pressure, and the first low-pressure steam the absolute value of temperature gap before and after vapour motor-driven valve is less than a predetermined temperature;
And first, second combustion engine load deviation is less than predetermined load;
A2: or the first low-pressure steam vapour Electrically operated gate are opened;
A3: or the second low-pressure steam vapour Electrically operated gate and the second low-pressure steam vapour bypass Electrically operated gate are closed;
One of A1, A2 and A3 or multiple if satisfied condition, judge the first low-pressure steam and whether vapour bypass Electrically operated gate is opened; If the first low-pressure steam vapour bypass Electrically operated gate are not opened, send out the first low-pressure steam and the instruction of vapour bypass Electrically operated gate;
If the first low-pressure steam vapour bypass Electrically operated gate are opened, judge the first low-pressure steam and whether vapour Electrically operated gate is opened, if described first low-pressure steam vapour Electrically operated gate are not opened, send out the first low-pressure steam and the instruction of vapour Electrically operated gate;
If the first low-pressure steam vapour Electrically operated gate are opened, judge the first low-pressure steam and whether vapour bypass Electrically operated gate closes; If the first low-pressure steam vapour bypass Electrically operated gate are not closed, send pass first low-pressure steam and the instruction of vapour bypass Electrically operated gate.
4. on off control method according to claim 3, is characterized in that, described on off control method also comprises:
Judge whether that the first waste heat boiler has moved back and time delay one scheduled time, or the first low lateral pressure control valve is in automatic position;
If the first waste heat boiler has moved back and time delay one scheduled time, or the first low lateral pressure control valve is in automatic position, judges whether the first low-pressure steam and vapour Electrically operated gate has been closed and the first low-pressure steam vapour bypass Electrically operated gate are closed; If not, pass first low-pressure steam is sent and vapour Electrically operated gate and the first low-pressure steam the instruction of vapour bypass Electrically operated gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081291.6A CN104654267B (en) | 2015-02-15 | 2015-02-15 | Gas power station two drags a unit steam vapour system and on off control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510081291.6A CN104654267B (en) | 2015-02-15 | 2015-02-15 | Gas power station two drags a unit steam vapour system and on off control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104654267A true CN104654267A (en) | 2015-05-27 |
| CN104654267B CN104654267B (en) | 2016-08-24 |
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| CN204478003U (en) * | 2015-02-15 | 2015-07-15 | 华北电力科学研究院有限责任公司 | Gas power station two drags a unit steam vapour system |
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