Steam turbine rotor vibration instrument signal acquisition system

Abstract

The invention specifically relates to a steam turbine rotor vibration instrument signal acquisition system comprising a steam turbine rotor vibration instrument used for acquiring steam turbine rotor vibration signals; the signal conversion module is used for converting the steam turbine rotor vibration signal into a current signal and a voltage signal; the TDM system is used for acquiring the voltage signal of the signal conversion module and analyzing the vibration state of the steam turbine rotor; the ETS system is used for collecting the current signal of the signal conversion module and carrying out steam turbine trip logic operation; the DEH system is used for collecting a current signal of the ETS system and performing steam turbine control logic operation; and the DCS system is used for collecting current signals of the DEH system. According to the steam turbine rotor vibration instrument signal acquisition system, steam turbine rotor vibration instrument signal acquisition is dispersed to different acquisition cards, and the risk that a steam turbine trip signal is triggered by mistake due to the fault of a single TSI signal acquisition card is reduced; configurations of a TSI signal acquisition card and a programmable relay card are cancelled, and the equipment purchase cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine rotor vibration measuring instruments, in particular to a steam turbine rotor vibration instrument signal acquisition system. Background Art

[0002] The turbine rotor vibration instrument signal is an important monitoring parameter in turbine operation and is used for turbine trip protection control and turbine vibration status analysis.

[0003] Existing steam turbine rotor vibration instrument signal transmission system such as Figure 1 As shown in the figure, the turbine rotor vibration instrument signal is sent to the TSI signal acquisition card in the TSI system for collection. The TSI system is the abbreviation of the turbine instrument monitoring system. The TSI signal acquisition card sends the turbine rotor vibration instrument signal to the configurable relay card through hard wiring. The relay card performs turbine trip logic configuration on the turbine rotor vibration instrument signal, generates a turbine trip signal and sends it to the ETS system through hard wiring to realize turbine trip. The ETS system is the abbreviation of the turbine emergency shutdown system. The TSI signal acquisition card sends the turbine rotor vibration instrument signal to the DCS system and DEH system through communication or hard wiring, which is used for turbine vibration parameter monitoring and turbine control logic operation. The DCS system is the abbreviation of the distributed control system of the nuclear power plant, and the DEH system is the abbreviation of the turbine control system. The TSI signal acquisition card sends the turbine rotor vibration instrument signal to the TDM system through hard wiring, which is used for turbine vibration status analysis. The TDM system is the abbreviation of the turbine rotation diagnosis monitoring and management system.

[0004] At present, most of the turbine rotor vibration instrument signals are involved in the turbine trip logic operation. A TSI signal acquisition card can collect up to 2 channels of turbine rotor vibration instrument signals. Usually, a TSI signal acquisition card is designed to collect 2 channels of turbine rotor vibration instrument signals. This design method increases the risk of triggering the turbine trip protection action due to the failure of a single TSI signal acquisition card. The turbine rotor vibration instrument signals are not designed to be dispersed, which is not conducive to the safe and stable operation of the turbine. The design of collecting one channel of turbine rotor vibration instrument signals with one TSI signal acquisition card requires doubling the number of TSI signal acquisition cards, which will significantly increase the equipment procurement cost. Summary of the invention

[0005] One of the purposes of the present invention is to provide a steam turbine rotor vibration instrument signal acquisition system to solve the problem of the risk of a single TSI signal acquisition card failure falsely triggering a turbine trip signal in the existing steam turbine rotor vibration instrument signal acquisition system, to achieve the distribution of steam turbine rotor vibration instrument signal acquisition to different acquisition cards, to reduce the risk of a single TSI signal acquisition card failure falsely triggering a turbine trip signal, and to improve the reliability of the steam turbine rotor vibration instrument signal.

[0006] The second object of the present invention is to provide a steam turbine rotor vibration instrument signal acquisition system to solve the problem that the existing steam turbine rotor vibration instrument signal acquisition system has a design in which one TSI signal acquisition card collects one steam turbine rotor vibration instrument signal, resulting in a significant increase in equipment procurement costs. The steam turbine rotor vibration instrument signal acquisition is distributed to different acquisition cards, the TSI signal acquisition card and programmable relay card configuration are cancelled, and the equipment procurement cost is reduced.

[0007] In order to achieve the above object, the present invention provides the following technical solutions:

[0008] A steam turbine rotor vibration instrument signal acquisition system, comprising:

[0009] The steam turbine rotor vibration meter is installed on the steam turbine rotor and is used to collect the steam turbine rotor vibration signal and output it to the signal conversion module;

[0010] A signal conversion module is installed on the local side of the steam turbine rotor vibration instrument, and is used to receive the steam turbine rotor vibration signal output by the steam turbine rotor vibration instrument, convert the steam turbine rotor vibration signal into a steam turbine rotor vibration current signal and a steam turbine rotor vibration voltage signal, output the steam turbine rotor vibration current signal to the ETS signal acquisition card, and output the steam turbine rotor vibration voltage signal to the TDM signal acquisition card;

[0011] The TDM system is provided with a TDM signal acquisition card, which is used to receive the turbine rotor vibration voltage signal output by the signal conversion module through the TDM signal acquisition card, and perform turbine rotor vibration state analysis on the turbine rotor vibration voltage signal;

[0012] The ETS system is equipped with an ETS signal acquisition card, a one-to-three isolation fence, a triple redundant CPU, an ETS communication module and an ETS signal output card, which is used to receive the turbine rotor vibration current signal output by the signal conversion module through the ETS signal acquisition card, divide the turbine rotor vibration current signal into three paths through the one-to-three isolation fence, perform turbine tripping logic operations on the three paths of turbine rotor vibration current signals respectively through the triple redundant CPU, output the turbine rotor vibration current signal to the DEH communication card A through the ETS communication module; and output the turbine rotor vibration current signal to the DEH signal acquisition card through the ETS signal output card;

[0013] The DEH system is provided with a DEH communication card A, a DEH signal acquisition card, a DEH signal output card and a DEH communication card B, which is used to receive the steam turbine rotor vibration current signal output by the ETS communication module through the DEH communication card A, receive the steam turbine rotor vibration current signal output by the ETS signal output card through the DEH signal acquisition card and perform steam turbine control logic operations, output the steam turbine rotor vibration current signal to the DCS communication card through the DEH communication card B, and output the steam turbine rotor vibration current signal to the DCS signal acquisition card through the DEH signal output card;

[0014] The DCS system is equipped with a DCS communication card and a DCS signal acquisition card, which are used to receive the turbine rotor vibration current signal output by the DEH communication card B through the DCS communication card, and receive the turbine rotor vibration current signal output by the DEH signal output card through the DCS signal acquisition card, so as to provide turbine vibration parameter monitoring for the operating personnel.

[0015] As one of the possible implementations, the turbine rotor vibration instrument is powered by the ETS signal acquisition card via hard wiring C.

[0016] As one of the possible implementations, the turbine rotor vibration current signal is (4-20) mA.

[0017] As one of the possible implementation methods, the signal conversion module outputs the turbine rotor vibration voltage signal to the TDM signal acquisition card via hard wiring A.

[0018] As one of the possible implementation methods, the signal conversion module outputs the turbine rotor vibration current signal to the ETS signal acquisition card via hard wiring B.

[0019] As one of the feasible ways, in the ETS system, a one-to-three isolation barrier outputs three steam turbine rotor vibration current signals to the triple redundant CPU via hard wiring D.

[0020] As one of the possible implementation methods, the ETS communication module outputs the turbine rotor vibration current signal to the DEH communication card A via the communication network cable A.

[0021] As one of the possible implementation methods, the ETS signal output card outputs the turbine rotor vibration current signal to the DEH signal acquisition card via hard wiring E.

[0022] As one of the feasible ways, DEH communication card B outputs the turbine rotor vibration current signal to the DCS communication card via the communication network cable B.

[0023] As one of the possible implementation methods, the DEH signal output card outputs the turbine rotor vibration current signal to the DCS signal acquisition card via hard wiring F.

[0024] Beneficial technical effects of the present invention:

[0025] The steam turbine rotor vibration instrument signal acquisition system of the present invention has a signal conversion module that realizes the signal processing and conversion functions of the TSI signal acquisition card. The converted signal meets the requirements of the steam turbine trip protection logic operation and the turbine vibration state analysis, realizes the physical isolation of the steam turbine rotor vibration instrument trip protection signal and the steam turbine vibration state diagnosis signal, and avoids signal common module failure; the steam turbine rotor vibration current signal acquired by the ETS system 9 is dispersed to different acquisition cards, reducing the risk of falsely triggering the steam turbine trip signal due to the failure of a single TSI signal acquisition card, and improving the reliability of the steam turbine rotor vibration instrument signal; the ETS system 9 realizes the steam turbine trip logic operation, further improving the reliability of the steam turbine rotor vibration trip protection logic; the TSI signal acquisition card and the programmable relay card configuration are cancelled, reducing the equipment procurement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of the existing steam turbine rotor vibration instrument signal acquisition system;

[0027] Figure 2 The present invention is a schematic diagram of the structure of a steam turbine rotor vibration instrument signal acquisition system according to an embodiment of the present invention.

[0028] In the figure, 1-turbine rotor; 2-turbine rotor vibration instrument; 3-signal conversion module; 4-hard wiring A; 5-TDM signal acquisition card; 6-TDM system; 7-hard wiring B; 8-hard wiring C; 9-ETS system; 10-ETS signal acquisition card; 11-one-to-three isolation fence; 12-hard wiring D; 13-triple redundant CPU; 14-ETS communication module; 15-ETS signal output card; 16-communication network cable A; 17-hard wiring E; 18-DEH communication card A; 19-DEH signal acquisition card; 20-DEH system; 21-DEH communication card B; 22-DEH signal output card; 23-communication network cable B; 24-hard wiring F; 25-DCS communication card; 26-DCS signal acquisition card; 27-DCS system; 28-TSI signal acquisition card; 29-programmable relay card; 30-TSI system. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is described clearly and completely below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] See also Figure 2 This embodiment provides a steam turbine rotor vibration instrument signal acquisition system, including:

[0032] The steam turbine rotor vibration meter 2 is installed on the steam turbine rotor 1 and is used to collect the steam turbine rotor vibration signal and output it to the signal conversion module 3;

[0033] The signal conversion module 3 is installed on the local side of the steam turbine rotor vibration meter 2, and is used to receive the steam turbine rotor vibration signal output by the steam turbine rotor vibration meter 2, convert the steam turbine rotor vibration signal into a steam turbine rotor vibration current signal and a steam turbine rotor vibration voltage signal, output the steam turbine rotor vibration current signal to the ETS signal acquisition card 10, and output the steam turbine rotor vibration voltage signal to the TDM signal acquisition card 5;

[0034] The TDM system 6 is provided with a TDM signal acquisition card 5, which is used to receive the turbine rotor vibration voltage signal output by the signal conversion module 3 through the TDM signal acquisition card 5, and perform turbine rotor vibration state analysis on the turbine rotor vibration voltage signal;

[0035] The ETS system 9 is provided with an ETS signal acquisition card 10, a one-to-three isolation fence 11, a triple redundant CPU 13, an ETS communication module 14 and an ETS signal output card 15, which is used for receiving the turbine rotor vibration current signal output by the signal conversion module 3 through the ETS signal acquisition card 10, dividing the turbine rotor vibration current signal into three paths through the one-to-three isolation fence 11, performing turbine tripping logic operations on the three paths of turbine rotor vibration current signals respectively through the triple redundant CPU 13, outputting the turbine rotor vibration current signal to the DEH communication card A18 through the ETS communication module 14; and outputting the turbine rotor vibration current signal to the DEH signal acquisition card 19 through the ETS signal output card 15;

[0036] The DEH system 20 is provided with a DEH communication card A18, a DEH signal acquisition card 19, a DEH signal output card 21 and a DEH communication card B 22, and is used for receiving the steam turbine rotor vibration current signal output by the ETS communication module 14 through the DEH communication card A18, receiving the steam turbine rotor vibration current signal output by the ETS signal output card 15 through the DEH signal acquisition card 19 and performing a steam turbine control logic operation, outputting the steam turbine rotor vibration current signal to the DCS communication card 25 through the DEH communication card B 22, and outputting the steam turbine rotor vibration current signal to the DCS signal acquisition card 26 through the DEH signal output card 21;

[0037] The DCS system 27 is provided with a DCS communication card 25 and a DCS signal acquisition card 26, which is used to receive the turbine rotor vibration current signal output by the DEH communication card B 22 through the DCS communication card 25, and receive the turbine rotor vibration current signal output by the DEH signal output card 21 through the DCS signal acquisition card 26, so as to provide turbine vibration parameter monitoring for the operating personnel.

[0038] In this embodiment, as one of the implementable ways, the steam turbine rotor vibration instrument 2 is powered by the ETS signal acquisition card 10 via the hard wiring C8.

[0039] In this embodiment, as one of the implementable methods, the turbine rotor vibration current signal is (4-20) mA.

[0040] In this embodiment, as one of the implementable ways, the signal conversion module 3 outputs the turbine rotor vibration voltage signal to the TDM signal acquisition card 5 via the hard wiring A 4 .

[0041] In this embodiment, as one of the implementable ways, the signal conversion module 3 outputs the turbine rotor vibration current signal to the ETS signal acquisition card 10 via the hard wiring B7.

[0042] In this embodiment, as one of the implementable ways, in the ETS system 9, the one-to-three isolation barrier 11 outputs three steam turbine rotor vibration current signals to the triple redundant CPU 13 via hard wiring D12 respectively.

[0043] In this embodiment, as one of the implementable ways, the ETS communication module 14 outputs the turbine rotor vibration current signal to the DEH communication card A18 via the communication network cable A16.

[0044] In this embodiment, as one of the implementable ways, the ETS signal output card 15 outputs the turbine rotor vibration current signal to the DEH signal acquisition card 19 via the hard wiring E17.

[0045] In this embodiment, as one of the implementable ways, the DEH communication card B 22 outputs the turbine rotor vibration current signal to the DCS communication card 25 via the communication network cable B 23.

[0046] In this embodiment, as one of the implementable ways, the DEH signal output card 21 outputs the turbine rotor vibration current signal to the DCS signal acquisition card 26 via the hard wiring F 24 .

[0047] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A steam turbine rotor vibration instrument signal acquisition system, characterized in that: include: A steam turbine rotor vibration meter (2), mounted on the steam turbine rotor (1), for collecting a steam turbine rotor vibration signal and outputting it to a signal conversion module (3); A signal conversion module (3) is installed on the local side of the steam turbine rotor vibration meter (2), and is used to receive the steam turbine rotor vibration signal output by the steam turbine rotor vibration meter (2), convert the steam turbine rotor vibration signal into a steam turbine rotor vibration current signal and a steam turbine rotor vibration voltage signal, output the steam turbine rotor vibration current signal to the ETS signal acquisition card (10), and output the steam turbine rotor vibration voltage signal to the TDM signal acquisition card (5); The TDM system (6) is provided with a TDM signal acquisition card (5) for receiving the steam turbine rotor vibration voltage signal output by the signal conversion module (3) through the TDM signal acquisition card (5) and performing steam turbine rotor vibration state analysis on the steam turbine rotor vibration voltage signal; The ETS system (9) is provided with an ETS signal acquisition card (10), a one-to-three isolation fence (11), a triple redundant CPU (13), an ETS communication module (14) and an ETS signal output card (15), and is used for receiving the steam turbine rotor vibration current signal output by the signal conversion module (3) through the ETS signal acquisition card (10), dividing the steam turbine rotor vibration current signal into three paths through the one-to-three isolation fence (11), performing steam turbine tripping logic operations on the three paths of steam turbine rotor vibration current signals respectively through the triple redundant CPU (13), outputting the steam turbine rotor vibration current signal to the DEH communication card A (18) through the ETS communication module (14); and outputting the steam turbine rotor vibration current signal to the DEH signal acquisition card (19) through the ETS signal output card (15); The DEH system (20) is provided with a DEH communication card A (18), a DEH signal acquisition card (19), a DEH signal output card (21) and a DEH communication card B (22), and is used for receiving the steam turbine rotor vibration current signal output by the ETS communication module (14) through the DEH communication card A (18), receiving the steam turbine rotor vibration current signal output by the ETS signal output card (15) through the DEH signal acquisition card (19) and performing steam turbine control logic operation, outputting the steam turbine rotor vibration current signal to the DCS communication card (25) through the DEH communication card B (22), and outputting the steam turbine rotor vibration current signal to the DCS signal acquisition card (26) through the DEH signal output card (21); The DCS system (27) is provided with a DCS communication card (25) and a DCS signal acquisition card (26), and is used for receiving the steam turbine rotor vibration current signal output by the DEH communication card B (22) through the DCS communication card (25), and receiving the steam turbine rotor vibration current signal output by the DEH signal output card (21) through the DCS signal acquisition card (26).

2. The steam turbine rotor vibration instrument signal acquisition system according to claim 1, characterized in that: The steam turbine rotor vibration instrument (2) is powered by the ETS signal acquisition card (10) via hard wiring C (8).

3. The steam turbine rotor vibration instrument signal acquisition system according to claim 1, characterized in that: The turbine rotor vibration current signal is between (4 and 20) mA.

4. The steam turbine rotor vibration instrument signal acquisition system according to claim 1, characterized in that: The signal conversion module (3) outputs the turbine rotor vibration voltage signal to the TDM signal acquisition card (5) via the hard wiring A (4).

5. The steam turbine rotor vibration instrument signal acquisition system according to claim 1, characterized in that: The signal conversion module (3) outputs the turbine rotor vibration current signal to the ETS signal acquisition card (10) via the hard wiring B (7).

6. The steam turbine rotor vibration instrument signal acquisition system according to claim 1, characterized in that: In the ETS system (9), a one-to-three isolation barrier (11) outputs three steam turbine rotor vibration current signals to a triple redundant CPU (13) via hard wiring D (12).

7. The steam turbine rotor vibration instrument signal acquisition system according to claim 1, characterized in that: The ETS communication module (14) outputs the turbine rotor vibration current signal to the DEH communication card A (18) via the communication network cable A (16).

8. The steam turbine rotor vibration instrument signal acquisition system according to claim 1, characterized in that: The ETS signal output card (15) outputs the turbine rotor vibration current signal to the DEH signal acquisition card (19) via the hard wiring E (17).

9. The steam turbine rotor vibration instrument signal acquisition system according to claim 1, characterized in that: The DEH communication card B (22) outputs the turbine rotor vibration current signal to the DCS communication card (25) via the communication network cable B (23).

10. The steam turbine rotor vibration instrument signal acquisition system according to claim 1, characterized in that: In this embodiment, as one of the implementable methods, the DEH signal output card (21) outputs the turbine rotor vibration current signal to the DCS signal acquisition card (26) via the hard wiring F (24).

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