A monitoring system and method for the anti-surge bleed valve of a gas turbine

Abstract

The present invention relates to the technical field of gas turbines, and particularly to an anti-surge bleed valve monitoring system and method for a gas turbine. It includes: an anti-surge bleed valve; a detection unit for, after the gas turbine starts, detecting the rotational speed of the gas turbine in real time; a timing unit for, when the rotational speed of the gas turbine is less than 90% of the rated rotational speed of the gas turbine, calculating the operating duration of the gas turbine in real time; a control unit for, when the rotational speed of the gas turbine is less than 90% of the rated rotational speed of the gas turbine, generating an open position signal and controlling the anti-surge bleed valve to leave the open position; the control unit is further used for, when the rotational speed of the gas turbine is less than 90% of the rated rotational speed of the gas turbine and the operating duration of the gas turbine is greater than or equal to 20 s, controlling the gas turbine to stop operating. The present invention improves the starting success rate of the gas turbine, ensures the safety of the power grid and the heat network, avoids the problem of delayed grid connection, and at the same time improves the start-up economy of the unit.

Description

Technical Field

[0001] The present invention relates to the technical field of gas turbines, and particularly to a monitoring system and method for an anti-surge bleed valve of a gas turbine. Background Art

[0002] Gas-steam combined cycle heating units shoulder the important tasks of power grid peak regulation and heat supply to surrounding enterprises. Whether the unit can be successfully started is related to the safety of the power grid and the heat network. At the same time, the start-up success rate of the unit is also related to start-up economy and power generation, which will ultimately affect the overall plant efficiency. In most existing power plants, ALSTOM GT13E2 gas turbines are used. During the start-up process of the gas turbine, when the speed rises to about 900 rpm, it is very easy to repeatedly occur the situation that the open signal of the anti-surge bleed valve disappears, resulting in the failure of the gas turbine to start, causing the unit to be delayed in grid connection for 30 minutes, reducing the start-up success rate and start-up economy of the gas turbine, and threatening the safety of the power grid and the heat network. Therefore, how to provide a monitoring system and method for an anti-surge bleed valve of a gas turbine is an urgent technical problem to be solved by those skilled in the art. Summary of the Invention

[0003] The purpose of the present invention is to provide a monitoring system and method for an anti-surge bleed valve of a gas turbine. The present invention comprehensively detects the anti-surge bleed valve body, limit switch, and lubricating oil quality, and conducts effective control, improving the start-up success rate of the gas turbine, ensuring the safety of the power grid and the heat network, avoiding the problem of delayed grid connection, and at the same time improving the start-up economy of the unit.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A monitoring system for an anti-surge bleed valve of a gas turbine, comprising:

[0006] An anti-surge bleed valve;

[0007] A detection unit, which is used to detect the speed n of the gas turbine in real time after the gas turbine starts;

[0008] A timing unit, which is used to calculate the running duration t of the gas turbine in real time when the speed n of the gas turbine is less than 90% of the rated speed of the gas turbine;

[0009] A control unit, which is used to generate an open position signal and control the anti-surge bleed valve to leave the open position when the speed n of the gas turbine is less than 90% of the rated speed of the gas turbine;

[0010] The control unit is further used to control the gas turbine to stop running when the speed n of the gas turbine is less than 90% of the rated speed of the gas turbine and the running duration t of the gas turbine is greater than or equal to 20 s.

[0011] In some embodiments of the present application, the control unit is further configured to determine the compressor bleed air pressure according to the rotational speed n of the gas turbine.

[0012] A preset gas turbine speed matrix T0 and a preset compressor bleed air pressure matrix A are set in the control unit. For the preset compressor bleed air pressure matrix A, A(A1, A2, A3, A4) is set, where A1 is the first preset compressor bleed air pressure, A2 is the second preset compressor bleed air pressure, A3 is the third preset compressor bleed air pressure, A4 is the fourth preset compressor bleed air pressure, and A1 < A2 < A3 < A4.

[0013] For the preset gas turbine speed matrix T0, T0(T01, T02, T03, T04) is set, where T01 is the first preset gas turbine speed, T02 is the second preset gas turbine speed, T03 is the third preset gas turbine speed, T04 is the fourth preset gas turbine speed, and T01 < T02 < T03 < T04.

[0014] The control unit is further configured to select the corresponding compressor bleed air pressure as the determined compressor bleed air pressure according to the relationship between n and the preset gas turbine speed matrix T0.

[0015] When n < T01, the first preset compressor bleed air pressure A1 is selected as the determined compressor bleed air pressure.

[0016] When T01 ≤ n < T02, the second preset compressor bleed air pressure A2 is selected as the determined compressor bleed air pressure.

[0017] When T02 ≤ n < T03, the third preset compressor bleed air pressure A3 is selected as the determined compressor bleed air pressure.

[0018] When T03 ≤ n < T04, the fourth preset compressor bleed air pressure A4 is selected as the determined compressor bleed air pressure.

[0019] In some embodiments of the present application, the detection unit is further configured to detect the lubricating oil particle size grade in the lubricating oil of the anti-surge bleed valve.

[0020] The control unit is further configured to generate a closing signal and control the anti-surge bleed valve to move to the closing position when the lubricating oil particle size grade in the lubricating oil of the anti-surge bleed valve is greater than the preset standard particle size grade.

[0021] In some embodiments of the present application, the detection unit is further configured to periodically detect the status of the anti-surge bleed valve after the gas turbine is started, and determine the operating status of the anti-surge bleed valve; wherein, the operating status includes a normal status, a valve jamming status, a cylinder air leakage status, and a switch action delay status;

[0022] It further includes:

[0023] An alarm unit, which is configured to give an alarm in real time when the operating status of the anti-surge bleed valve is the valve jamming status, the cylinder air leakage status, or the switch action delay status;

[0024] The control unit is further configured to control the gas turbine to stop operating when the alarm unit gives an alarm in real time.

[0025] In some embodiments of the present application, the detection unit is further configured to detect the status of the anti-surge bleed valve with a period of 15 minutes.

[0026] To achieve the above object, the present invention also correspondingly provides a method for monitoring the anti-surge bleed valve of a gas turbine, which is applied to the monitoring system of the anti-surge bleed valve of the gas turbine, and includes:

[0027] After the gas turbine is started, the rotational speed n of the gas turbine is detected in real time;

[0028] When the rotational speed n of the gas turbine is less than 90% of the rated rotational speed of the gas turbine, the operating duration t of the gas turbine is calculated in real time;

[0029] When the rotational speed n of the gas turbine is less than 90% of the rated rotational speed of the gas turbine, an open position signal is generated and the anti-surge bleed valve is controlled to leave the open position;

[0030] When the rotational speed n of the gas turbine is less than 90% of the rated rotational speed of the gas turbine and the operating duration t of the gas turbine is greater than or equal to 20 s, the gas turbine is controlled to stop operating.

[0031] In some embodiments of the present application, it further includes:

[0032] Determine the compressor extraction pressure according to the rotational speed n of the gas turbine;

[0033] A preset gas turbine rotational speed matrix T0 and a preset compressor extraction pressure matrix A are preset. For the preset compressor extraction pressure matrix A, A(A1, A2, A3, A4) is set, where A1 is the first preset compressor extraction pressure, A2 is the second preset compressor extraction pressure, A3 is the third preset compressor extraction pressure, A4 is the fourth preset compressor extraction pressure, and A1 < A2 < A3 < A4;

[0034] For the preset gas turbine speed matrix T0, set T0(T01, T02, T03, T04), where T01 is the first preset gas turbine speed, T02 is the second preset gas turbine speed, T03 is the third preset gas turbine speed, T04 is the fourth preset gas turbine speed, and T01 < T02 < T03 < T04;

[0035] Select the corresponding compressor bleed pressure as the determined compressor bleed pressure according to the relationship between n and the preset gas turbine speed matrix T0;

[0036] When n < T01, select the first preset compressor bleed pressure A1 as the determined compressor bleed pressure;

[0037] When T01 ≤ n < T02, select the second preset compressor bleed pressure A2 as the determined compressor bleed pressure;

[0038] When T02 ≤ n < T03, select the third preset compressor bleed pressure A3 as the determined compressor bleed pressure;

[0039] When T03 ≤ n < T04, select the fourth preset compressor bleed pressure A4 as the determined compressor bleed pressure.

[0040] In some embodiments of the present application, it further includes:

[0041] Detect the lubricating oil particle size grade in the lubricating oil of the anti-surge bleed valve;

[0042] When the lubricating oil particle size grade in the lubricating oil of the anti-surge bleed valve is greater than the preset standard particle size grade, generate a closing signal and control the anti-surge bleed valve to move to the closing position.

[0043] In some embodiments of the present application, it further includes:

[0044] After the gas turbine is started, periodically detect the state of the anti-surge bleed valve and determine the operating state of the anti-surge bleed valve; where the operating state includes a normal state, a valve jamming state, a cylinder air leakage state, and a switch action delay state;

[0045] When the operating state of the anti-surge bleed valve is the valve jamming state, the cylinder air leakage state, and the switch action delay state, give an alarm in real time;

[0046] When giving an alarm in real time, control the gas turbine to stop running.

[0047] In some embodiments of the present application, the status of the anti-surge bleed valve is detected every 15 minutes as a cycle.

[0048] The present invention provides a monitoring system and method for an anti-surge bleed valve of a gas turbine. Compared with the prior art, its beneficial effects are as follows:

[0049] After the gas turbine starts, the present invention detects the rotational speed of the gas turbine in real time. When the rotational speed of the gas turbine is less than 90% of the rated rotational speed of the gas turbine, the running time of the gas turbine is calculated in real time, and the anti-surge bleed valve or the gas turbine is controlled to stop running according to the rotational speed and the running time, effectively improving the starting success rate of the gas turbine, ensuring the safety of the power grid and the heat network, avoiding the problem of delayed grid connection, and at the same time improving the economic efficiency of the unit startup. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 is a functional block diagram of a monitoring system for an anti-surge bleed valve of a gas turbine in an embodiment of the present invention;

[0051] Figure 2 is a flowchart of a monitoring method for an anti-surge bleed valve of a gas turbine in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0052] The following further describes in detail the specific embodiments of the present invention with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0053] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0054] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "plurality" is two or more.

[0055] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" 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 an indirect connection through an intermediate medium, and it can be the communication between the inner sides of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0056] Referring to Figure 1 As shown, the disclosed embodiment of the present invention provides a monitoring system for a surge relief valve of a gas turbine, including:

[0057] A surge relief valve;

[0058] A detection unit, which is used to detect the rotational speed n of the gas turbine in real time after the gas turbine starts.

[0059] A timing unit, which is used to calculate the running duration t of the gas turbine in real time when the rotational speed n of the gas turbine is less than 90% of the rated rotational speed of the gas turbine.

[0060] A control unit, which is used to generate an open position signal and control the surge relief valve to leave the open position when the rotational speed n of the gas turbine is less than 90% of the rated rotational speed of the gas turbine.

[0061] The control unit is further used to control the gas turbine to stop running when the rotational speed n of the gas turbine is less than 90% of the rated rotational speed of the gas turbine and the running duration t of the gas turbine is greater than or equal to 20 s.

[0062] In a specific embodiment of the present application, the control unit is further used to determine the compressor extraction pressure according to the rotational speed n of the gas turbine.

[0063] A preset gas turbine rotational speed matrix T0 and a preset compressor extraction pressure matrix A are set in the control unit. For the preset compressor extraction pressure matrix A, A(A1, A2, A3, A4) is set, where A1 is the first preset compressor extraction pressure, A2 is the second preset compressor extraction pressure, A3 is the third preset compressor extraction pressure, A4 is the fourth preset compressor extraction pressure, and A1 < A2 < A3 < A4;

[0064] For the preset gas turbine rotational speed matrix T0, T0(T01, T02, T03, T04) is set, where T01 is the first preset gas turbine rotational speed, T02 is the second preset gas turbine rotational speed, T03 is the third preset gas turbine rotational speed, T04 is the fourth preset gas turbine rotational speed, and T01 < T02 < T03 < T04;

[0065] The control unit is further configured to select the corresponding compressor bleed pressure as the determined compressor bleed pressure according to the relationship between n and the preset gas turbine speed matrix T0;

[0066] When n < T01, select the first preset compressor bleed pressure A1 as the determined compressor bleed pressure;

[0067] When T01 ≤ n < T02, select the second preset compressor bleed pressure A2 as the determined compressor bleed pressure;

[0068] When T02 ≤ n < T03, select the third preset compressor bleed pressure A3 as the determined compressor bleed pressure;

[0069] When T03 ≤ n < T04, select the fourth preset compressor bleed pressure A4 as the determined compressor bleed pressure.

[0070] In a specific embodiment of the present application, the detection unit is further configured to detect the lubricating oil particle size grade in the lubricating oil of the anti-surge bleed valve;

[0071] The control unit is further configured to generate a closing signal and control the anti-surge bleed valve to move to the closing position when the lubricating oil particle size grade in the lubricating oil of the anti-surge bleed valve is greater than the preset standard particle size grade.

[0072] In a specific embodiment of the present application, the detection unit is further configured to periodically detect the state of the anti-surge bleed valve and determine the operating state of the anti-surge bleed valve after the gas turbine is started; wherein, the operating state includes a normal state, a valve jamming state, a cylinder air leakage state, and a switch action delay state;

[0073] Further includes:

[0074] An alarm unit, which is configured to give an alarm in real time when the operating state of the anti-surge bleed valve is a valve jamming state, a cylinder air leakage state, and a switch action delay state;

[0075] The control unit is further configured to control the gas turbine to stop running when the alarm unit gives an alarm in real time.

[0076] In a specific embodiment of the present application, the detection unit is further configured to detect the state of the anti-surge bleed valve with a period of 15 minutes.

[0077] Based on the same technical concept, refer to Figure 2 As shown, the present invention further provides a method for monitoring an anti-surge bleed valve of a gas turbine, which is applied to a monitoring system of the anti-surge bleed valve of a gas turbine, and includes:

[0078] After the gas turbine is started, the rotation speed n of the gas turbine is detected in real time;

[0079] When the rotational speed n of the gas turbine is less than 90% of the rated rotational speed of the gas turbine, the running duration t of the gas turbine is calculated in real time;

[0080] When the rotational speed n of the gas turbine is less than 90% of the rated rotational speed of the gas turbine, an open position signal is generated and the anti-surge bleed valve is controlled to leave the open position;

[0081] When the rotational speed n of the gas turbine is less than 90% of the rated rotational speed of the gas turbine and the running duration t of the gas turbine is greater than or equal to 20 s, the gas turbine is controlled to stop running.

[0082] In a specific embodiment of the present application, it further includes:

[0083] The compressor extraction pressure is determined according to the rotational speed n of the gas turbine;

[0084] There is a preset gas turbine rotational speed matrix T0 and a preset compressor extraction pressure matrix A in advance. For the preset compressor extraction pressure matrix A, A(A1, A2, A3, A4) is set, where A1 is the first preset compressor extraction pressure, A2 is the second preset compressor extraction pressure, A3 is the third preset compressor extraction pressure, A4 is the fourth preset compressor extraction pressure, and A1 < A2 < A3 < A4;

[0085] For the preset gas turbine rotational speed matrix T0, T0(T01, T02, T03, T04) is set, where T01 is the first preset gas turbine rotational speed, T02 is the second preset gas turbine rotational speed, T03 is the third preset gas turbine rotational speed, T04 is the fourth preset gas turbine rotational speed, and T01 < T02 < T03 < T04;

[0086] According to the relationship between n and the preset gas turbine rotational speed matrix T0, the corresponding compressor extraction pressure is selected as the determined compressor extraction pressure;

[0087] When n < T01, the first preset compressor extraction pressure A1 is selected as the determined compressor extraction pressure;

[0088] When T01 ≤ n < T02, the second preset compressor extraction pressure A2 is selected as the determined compressor extraction pressure;

[0089] When T02 ≤ n < T03, the third preset compressor extraction pressure A3 is selected as the determined compressor extraction pressure;

[0090] When T03 ≤ n < T04, the fourth preset compressor extraction pressure A4 is selected as the determined compressor extraction pressure.

[0091] In a specific embodiment of the present application, it further includes:

[0092] Detect the lubricating oil quality particle size grade in the lubricating oil of the anti-surge bleed valve;

[0093] When the lubricating oil quality particle size grade in the lubricating oil of the anti-surge bleed valve is greater than the preset standard particle size grade, generate a closing signal and control the anti-surge bleed valve to move to the closing position.

[0094] In a specific embodiment of the present application, it further includes:

[0095] After the gas turbine starts, periodically detect the status of the anti-surge bleed valve and determine the operating status of the anti-surge bleed valve; wherein, the operating status includes a normal status, a valve jamming status, a cylinder air leakage status, and a switch action delay status;

[0096] When the operating status of the anti-surge bleed valve is a valve jamming status, a cylinder air leakage status, or a switch action delay status, give an alarm in real time;

[0097] When giving an alarm in real time, control the gas turbine to stop running.

[0098] In a specific embodiment of the present application, use 15 minutes as a cycle to detect the status of the anti-surge bleed valve.

[0099] In summary, after the gas turbine starts, the present invention detects the rotational speed of the gas turbine in real time. When the rotational speed of the gas turbine is less than 90% of the rated rotational speed of the gas turbine, the running duration of the gas turbine is calculated in real time, and the anti-surge bleed valve or the gas turbine is controlled to stop running according to the rotational speed and the running duration, effectively improving the starting success rate of the gas turbine, ensuring the safety of the power grid and the heat network, avoiding the problem of delayed grid connection, and at the same time improving the economic efficiency of the unit startup.

[0100] The above is only one example of the present invention, but it cannot limit the scope of the present invention. Any structural changes made according to the present invention, as long as they do not deviate from the essence of the present invention, should be regarded as falling within the protection scope of the present invention and being restricted.

[0101] Those skilled in the art to which the present invention pertains can clearly understand that for the convenience and simplicity of description, the specific working process and related descriptions of the above-described system can refer to the corresponding process in the foregoing method embodiment, and will not be repeated here.

[0102] It should be noted that for the system provided in the above embodiments, only the division of the above functional modules is used for illustration. In practical applications, the above functions can be assigned to different functional modules according to needs, that is, the modules or steps in the embodiments of the present invention can be further decomposed or combined. For example, the modules in the above embodiments can be combined into one module, or further split into multiple sub-modules to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only used to distinguish each module or step, and are not regarded as an improper limitation of the present invention.

[0103] Those skilled in the art should be able to realize that the modules and method steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. The programs corresponding to the software modules and method steps can be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium well-known in the technical field. To clearly illustrate the interchangeability of electronic hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in the form of electronic hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0104] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, so that a process, method, article, or device / equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to these processes, methods, articles, or devices / equipment.

[0105] So far, the technical solution of the present invention has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0106] The above is only a preferred embodiment of the present invention, and is not used to limit the protection scope of the present invention.

Claims

1. A gas turbine anti-surge bleed valve monitoring system, characterized in that: include: Anti-surge relief valve; a detection unit, the detection unit being used to detect the speed n of the gas turbine in real time after the gas turbine is started; a timing unit, configured to calculate in real time the operating time t of the gas turbine when the speed n of the gas turbine is less than 90% of the rated speed of the gas turbine; a control unit, configured to generate an opening signal and control the anti-surge bleed valve to leave the open position when the speed n of the gas turbine is less than 90% of the rated speed of the gas turbine; The control unit is further configured to control the gas turbine to stop running when the speed n of the gas turbine is less than 90% of the rated speed of the gas turbine and the running time t of the gas turbine is greater than or equal to 20 seconds; The control unit is further configured to determine the compressor extraction pressure according to the rotational speed n of the gas turbine; The control unit is set with a preset gas turbine speed matrix T0 and a preset compressor extraction pressure matrix A. For the preset compressor extraction pressure matrix A, A(A1, A2, A3, A4) is set, where A1 is a first preset compressor extraction pressure, A2 is a second preset compressor extraction pressure, A3 is a third preset compressor extraction pressure, and A4 is a fourth preset compressor extraction pressure, and A1<A2<A3<A4; For the preset gas turbine speed matrix T0, set T0(T01, T02, T03, T04), where T01 is the first preset gas turbine speed, T02 is the second preset gas turbine speed, T03 is the third preset gas turbine speed, and T04 is the fourth preset gas turbine speed, and T01<T02<T03<T04; The control unit is further configured to select a corresponding compressor extraction pressure as the determined compressor extraction pressure according to the relationship between n and the preset gas turbine speed matrix T0; When n<T01, the first preset compressor extraction pressure A1 is selected as the determined compressor extraction pressure; When T01≤n<T02, the second preset compressor extraction pressure A2 is selected as the determined compressor extraction pressure; When T02≤n<T03, selecting the third preset compressor extraction pressure A3 as the determined compressor extraction pressure; When T03≤n<T04, the fourth preset compressor extraction pressure A4 is selected as the determined compressor extraction pressure.

2. A gas turbine anti-surge bleed valve monitoring system according to claim 1, characterized in that: The detection unit is also used to detect the particle size grade of the lubricating oil in the lubricating oil of the anti-surge release valve; The control unit is further configured to generate a closing signal and control the anti-surge bleed valve to move toward a closing position when the particle size of the lubricating oil in the lubricating oil of the anti-surge bleed valve is greater than a preset standard particle size.

3. The gas turbine anti-surge bleed valve monitoring system according to claim 1, characterized in that: The detection unit is further configured to periodically detect the status of the anti-surge bleed valve after the gas turbine is started, and determine the operating status of the anti-surge bleed valve; wherein the operating status includes a normal state, a valve stuck state, a cylinder leakage state, and a switch action delay state; Also includes: an alarm unit configured to generate an alarm in real time when the anti-surge relief valve is in the valve stuck state, the cylinder is leaking, or the switch action is delayed; The control unit is further configured to control the gas turbine to stop running when the alarm unit issues an alarm in real time.

4. A gas turbine anti-surge bleed valve monitoring system according to claim 3, characterized in that: The detection unit is further configured to perform status detection on the anti-surge relief valve with 15 minutes as a cycle.

5. A method for monitoring a gas turbine anti-surge bleed valve, applied to a gas turbine anti-surge bleed valve monitoring system according to any one of claims 1 to 4, characterized in that: include: After the gas turbine is started, the speed n of the gas turbine is detected in real time; When the speed n of the gas turbine is less than 90% of the rated speed of the gas turbine, calculating the running time t of the gas turbine in real time; When the speed n of the gas turbine is less than 90% of the rated speed of the gas turbine, an opening signal is generated and the anti-surge bleed valve is controlled to leave the open position; When the speed n of the gas turbine is less than 90% of the rated speed of the gas turbine and the operation time t of the gas turbine is greater than or equal to 20 seconds, the gas turbine is controlled to stop operating.

6. A method for monitoring an anti-surge bleed valve of a gas turbine according to claim 5, characterized in that: Also includes: determining a compressor extraction pressure according to a rotational speed n of the gas turbine; A preset gas turbine speed matrix T0 and a preset compressor extraction pressure matrix A are preset. For the preset compressor extraction pressure matrix A, A(A1, A2, A3, A4) is set, where A1 is a first preset compressor extraction pressure, A2 is a second preset compressor extraction pressure, A3 is a third preset compressor extraction pressure, and A4 is a fourth preset compressor extraction pressure, and A1<A2<A3<A4; For the preset gas turbine speed matrix T0, set T0(T01, T02, T03, T04), where T01 is the first preset gas turbine speed, T02 is the second preset gas turbine speed, T03 is the third preset gas turbine speed, and T04 is the fourth preset gas turbine speed, and T01<T02<T03<T04; selecting a corresponding compressor extraction pressure as the determined compressor extraction pressure according to the relationship between n and the preset gas turbine speed matrix T0; When n<T01, the first preset compressor extraction pressure A1 is selected as the determined compressor extraction pressure; When T01≤n<T02, the second preset compressor extraction pressure A2 is selected as the determined compressor extraction pressure; When T02≤n<T03, selecting the third preset compressor extraction pressure A3 as the determined compressor extraction pressure; When T03≤n<T04, the fourth preset compressor extraction pressure A4 is selected as the determined compressor extraction pressure.

7. The method for monitoring an anti-surge bleed valve of a gas turbine according to claim 5, characterized in that: Also includes: Detecting the particle size grade of the lubricating oil in the lubricating oil of the anti-surge bleed valve; When the particle size of the lubricating oil in the lubricating oil of the anti-surge bleed valve is greater than the preset standard particle size, a closing signal is generated and the anti-surge bleed valve is controlled to move toward the closing position.

8. The method for monitoring an anti-surge bleed valve of a gas turbine according to claim 5, characterized in that: Also includes: After the gas turbine is started, the anti-surge bleed valve is periodically checked to determine its operating state; wherein the operating state includes a normal state, a valve stuck state, a cylinder leakage state, and a switch action delay state; When the operating state of the anti-surge relief valve is the valve stuck state, the cylinder leaking state, or the switch action delayed state, an alarm is issued in real time; When an alarm is issued in real time, the gas turbine is controlled to stop operating.

9. The method for monitoring an anti-surge bleed valve of a gas turbine according to claim 8, characterized in that: The status of the anti-surge relief valve is detected with 15 minutes as a cycle.

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