CN212965775U - Nuclear power steam turbine high pressure rotor surface temperature simulation device - Google Patents
Nuclear power steam turbine high pressure rotor surface temperature simulation device Download PDFInfo
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- CN212965775U CN212965775U CN202021830034.0U CN202021830034U CN212965775U CN 212965775 U CN212965775 U CN 212965775U CN 202021830034 U CN202021830034 U CN 202021830034U CN 212965775 U CN212965775 U CN 212965775U
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Abstract
The utility model belongs to the technical field of the nuclear power steam turbine, concretely relates to nuclear power steam turbine high pressure rotor surface temperature analogue means. In the prior art, temperature measuring points are difficult to arrange at corresponding positions of the inner wall of an inner cylinder of a nuclear turbine, or the measuring points are easy to damage and difficult to maintain. The utility model discloses a: the data acquisition system, the interface and the computer are connected in turn; data are transmitted among the interface, the training data module, the vector regression model and the high-pressure rotor outer surface temperature predictor in sequence and are finally input into the computer; the temperature sensors measure the temperature of the inner wall of the control valve, the steam inlet pipe and the inner wall of the inner cylinder; the power sensor measures the generator power. The high pressure rotor outer surface temperature can be replaced by the analog values of the method and apparatus provided by the present invention. The method provides technical support for the thermal stress optimization control of the high-pressure rotor of the nuclear turbine and the safety of variable-load operation of the nuclear turbine.
Description
Technical Field
The invention belongs to the technical field of nuclear turbines, and particularly relates to a device for simulating the temperature of the outer surface of a high-pressure rotor of a nuclear turbine.
Background
The high-pressure rotor of the nuclear power turbine is larger in size relative to the high-pressure rotor of the thermal power turbine, and radial temperature transfer is slower. When the nuclear turbine is started, stopped and subjected to load variation, the temperature of steam on the outer surface of the high-pressure rotor changes violently, the temperature inside the high-pressure rotor changes slowly, and the temperature difference between the outer surface of the high-pressure rotor and the volume average temperature of the high-pressure rotor is large. The greater the temperature difference between the outer surface of the high pressure rotor and the volume average temperature of the high pressure rotor, the greater the thermal stress of the outer surface and the greater the life loss of the high pressure rotor. By monitoring the temperature difference between the outer surface of the high pressure rotor and the volume average temperature of the high pressure rotor, the thermal stress of the outer surface can be monitored. However, during the operation of the unit, the temperature cannot be directly measured by installing the temperature measuring element due to the rotation of the rotor. Although the temperature value obtained by the temperature measuring element arranged on the inner wall of the inner cylinder of the steam turbine at the corresponding position can be approximately replaced, in some cases, the arrangement of the temperature measuring point at the corresponding position of the inner wall of the inner cylinder of the nuclear steam turbine is difficult, or the measuring point is easy to damage and difficult to maintain. Therefore, a method for simulating the outer surface temperature of the high-pressure rotor of the nuclear steam turbine based on indirect measurement values is urgently needed.
Disclosure of Invention
1. The purpose is as follows:
the to-be-solved technical problem of the utility model is to provide a method and adopt device of this method of simulation high pressure rotor surface temperature after algorithm processing through indirect measurement value.
2. The technical scheme is as follows:
in order to solve the technical problem, the utility model provides a nuclear power steam turbine high pressure rotor surface temperature analogue means:
a temperature simulation device for the outer surface of a high-pressure rotor of a nuclear turbine comprises a data acquisition system, an interface and a computer, wherein the interface is sequentially connected with the computer; data are transmitted among the interface, the training data module, the vector regression model and the high-pressure rotor outer surface temperature predictor in sequence and are finally input into the computer.
The data acquisition system is connected with the analog-to-digital conversion, and the analog-to-digital conversion data is output to the data acquisition system; the analog-to-digital conversion data input is input by a temperature sensor and a power sensor.
The temperature sensors measure the temperature of the inner walls of the control valve, the steam inlet pipe and the inner cylinder; the power sensor measures the generator power.
One end of the control valve is connected with the steam interface, and the other end of the control valve is connected with the high-pressure cylinder of the steam turbine.
The steam turbine high pressure cylinder and the steam turbine low pressure cylinder are connected in sequence.
And the steam turbine high-pressure cylinder is also connected with the steam turbine low-pressure cylinder through a steam-water separation reheater.
And the computer outputs the data to the outer surface temperature display of the high-pressure rotor.
The other technical scheme of the invention is to provide a device adopting the method for simulating the temperature of the outer surface of the high-pressure rotor of the nuclear power turbine, which comprises a power transmitter and a high-precision quick-response temperature transmitter, wherein the power transmitter is used for measuring the electric power of the nuclear power turbine generator unit, the high-precision quick-response temperature transmitter is used for measuring the temperature of main steam and the temperature of the inner wall of an inner cylinder or the inner wall of a high-pressure steam inlet pipeline, a computer acquires and collects the electric power of the turbine generator unit acquired by the power transmitter and the high-precision quick-response temperature transmitter through a data acquisition system, the temperature of the main steam, the temperature of the inner wall of the inner cylinder or the inner wall of the high-pressure steam inlet pipeline are utilized, the temperature analog value is obtained by adopting a nuclear turbine high-pressure rotor outer surface temperature analog method by utilizing the data, and the temperature analog value is used for replacing a high-pressure rotor outer surface temperature measured value to participate in a nuclear turbine rotor thermal stress monitoring system.
3. The effect is as follows:
the method for simulating the temperature of the outer surface of the high-pressure rotor of the nuclear turbine uses the electric power of a steam turbine generator unit, the temperature of main steam and the temperature of the inner wall of an inner cylinder or the inner wall of a high-pressure steam inlet pipeline as input values, and a Support Vector Regression (SVR) is adopted to calculate the temperature of the outer surface of the high-pressure rotor of the nuclear turbine at a corresponding part. The method and the device provided by the invention overcome the defects of the prior art, and the temperature of the outer surface of the high-pressure rotor can be replaced by the analog value of the method and the device provided by the invention. The method provides technical support for the thermal stress optimization control of the high-pressure rotor of the nuclear turbine and the safety of variable-load operation of the nuclear turbine.
Drawings
FIG. 1 is a schematic diagram of a method for simulating the outer surface temperature of a high-pressure rotor of a nuclear turbine according to the present invention;
FIG. 2 is a schematic diagram of a simulation apparatus for the temperature of the outer surface of a high-pressure rotor of a nuclear turbine according to the present invention.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings. As shown in fig. 1 and fig. 2, a device for simulating the outer surface temperature of a high-pressure rotor of a nuclear turbine includes: the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder and the generator of the steam turbine are sequentially connected. The steam turbine high-pressure cylinder is connected with the steam-water separation reheater, and the steam-water separation reheater is connected with the steam turbine low-pressure cylinder. The steam interface is connected with the control valve, and the control valve is connected with the high-pressure cylinder of the steam turbine. The temperature sensor measures the control valve, the inner wall of the steam inlet pipe and the inner wall of the inner cylinder of the high-pressure cylinder of the steam turbine, and the power sensor measures the power of the generator. The temperature sensor, the power sensor and the analog-to-digital conversion are connected in sequence.
The analog-to-digital conversion connections are all connected with a data acquisition system; the data acquisition system, the interface, the computer and the temperature display of the outer surface of the high-pressure rotor are sequentially connected. The data acquisition system inputs data to the interface, and the interface outputs the data to training data; the data are transmitted among training data, a support vector regression model, a high-pressure rotor outer surface temperature predictor and a computer in sequence.
As shown in figure 1, the invention provides a flow chart of a simulation device of the outer surface temperature of a high-pressure rotor of a nuclear turbine, and the method for simulating the outer surface temperature of the high-pressure rotor of the nuclear turbine simulates the outer surface temperature of the high-pressure rotor of the nuclear turbine through calculation by utilizing a pre-trained Support Vector Regression (SVR) model through 3 parameters of electric power, main steam temperature and inner wall temperature of an inner cylinder or an inner wall of a high-pressure steam inlet pipeline of a nuclear turbine generator set which are detected on line. The specific implementation is divided into two parts of training and verification of an off-line Support Vector Regression (SVR) model and simulation temperature of an on-line Support Vector Regression (SVR) model.
Taking a certain 300MW grade nuclear turbine as an example, the temperature of main steam is 265 ℃. The method and the device for simulating the temperature of the outer surface of the high-pressure rotor of the nuclear turbine are created by a model and simulated by the temperature.
With reference to fig. 2, the invention provides a device adopting the method for simulating the temperature of the outer surface of the high-pressure rotor of the nuclear turbine, which comprises a power transmitter and a high-precision quick-response temperature transmitter, wherein the power transmitter is used for measuring the electric power of a turbo generator set, the high-precision quick-response temperature transmitter is used for measuring the temperature of main steam and the temperature of the inner wall of an inner cylinder or the inner wall of a high-pressure steam inlet pipeline, a computer acquires and collects the temperature by a data acquisition system through the power transmitter, the electric power of the steam turbine generator unit, the temperature of main steam, the temperature of the inner wall of an inner cylinder or the inner wall of a high-pressure steam inlet pipeline, which are acquired by the high-precision quick-response temperature transmitter, are utilized to acquire a temperature analog value by the method for simulating the temperature of the outer surface of the high-pressure rotor of the nuclear turbine, and the temperature analog value is used for replacing the measured value of the temperature of the outer surface of the high-pressure rotor to participate in the thermal stress monitoring system of the high-pressure.
In summary, the method and the device for simulating the outer surface temperature of the high-pressure rotor of the nuclear turbine provided by the invention can be used for calculating the outer surface temperature of the high-pressure rotor in real time by using the collected operating data such as the electric power of the steam turbine generator unit, the temperature of main steam, the temperature of the inner wall of an inner cylinder or the inner wall of a high-pressure steam inlet pipeline and the like in a control system of the nuclear turbine. The measured value of the outer surface temperature of the high-pressure rotor can be replaced by the simulated value of the method and the device provided by the invention. The method provides technical support for the thermal stress optimization control of the high-pressure rotor of the nuclear turbine and the safety of variable-load operation of the turbine.
Claims (6)
1. The utility model provides a nuclear power steam turbine high pressure rotor surface temperature analogue means which characterized in that: the data acquisition system, the interface and the computer are connected in turn; data are transmitted among the interface, the training data module, the vector regression model and the high-pressure rotor outer surface temperature predictor in sequence and are finally input into the computer; the temperature sensors measure the temperature of the inner wall of the control valve, the steam inlet pipe and the inner wall of the inner cylinder; the power sensor measures the generator power.
2. The apparatus for simulating the temperature of the outer surface of the high-pressure rotor of a nuclear turbine according to claim 1, wherein: the data acquisition system is connected with the analog-to-digital conversion, and the analog-to-digital conversion data is output to the data acquisition system; the analog-to-digital conversion data input is input by a temperature sensor and a power sensor.
3. The apparatus for simulating the temperature of the outer surface of the high-pressure rotor of a nuclear turbine according to claim 1, wherein: one end of the control valve is connected with the steam interface, and the other end of the control valve is connected with the high-pressure cylinder of the steam turbine.
4. The apparatus for simulating the temperature of the outer surface of the high-pressure rotor of a nuclear turbine according to claim 1, wherein: the steam turbine high pressure cylinder and the steam turbine low pressure cylinder are connected in sequence.
5. The apparatus for simulating the temperature of the outer surface of the high-pressure rotor of a nuclear turbine according to claim 1, wherein: and the steam turbine high-pressure cylinder is also connected with the steam turbine low-pressure cylinder through a steam-water separation reheater.
6. The apparatus for simulating the temperature of the outer surface of the high-pressure rotor of a nuclear turbine according to claim 1, wherein: and the computer outputs the data to the outer surface temperature display of the high-pressure rotor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021830034.0U CN212965775U (en) | 2020-08-28 | 2020-08-28 | Nuclear power steam turbine high pressure rotor surface temperature simulation device |
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| CN202021830034.0U CN212965775U (en) | 2020-08-28 | 2020-08-28 | Nuclear power steam turbine high pressure rotor surface temperature simulation device |
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| CN212965775U true CN212965775U (en) | 2021-04-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112130468A (en) * | 2020-08-28 | 2020-12-25 | 中核核电运行管理有限公司 | Device and method for simulating temperature of outer surface of high-pressure rotor of nuclear turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112130468A (en) * | 2020-08-28 | 2020-12-25 | 中核核电运行管理有限公司 | Device and method for simulating temperature of outer surface of high-pressure rotor of nuclear turbine |
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