A device for diagnosing and accurately positioning hydrogen leakage of a turbine generator stator bar

Abstract

The utility model discloses a kind of steam turbine generator stator bar hydrogen leakage diagnosis and accurate positioning device, including generator, the hydrogen in generator, still include: stator bar, the stator bar is located on the generator;Temperature data measuring instrument, the temperature data measuring instrument is located on the stator bar;Data acquisition equipment, the data acquisition equipment is located on the stator bar and is connected with the temperature data measuring instrument;Water tank, the water tank is connected on the generator. The steam turbine generator stator bar hydrogen leakage diagnosis and accurate positioning device, make full use of existing data, improve detection efficiency;Through the calculation of the combination of temperature data and hydrogen leakage data, effectively avoid the misjudgment problem that can appear when single data source diagnosis, improve the accuracy of measurement, if as the input end of online real-time monitoring, without maintaining non-positioning stator bar, reduce the workload of field maintenance personnel.

Description

Technical Field

[0001] This utility model relates to the field of safety operation monitoring technology for large generators, specifically a device for diagnosing and accurately locating hydrogen leakage in the stator bars of a steam turbine generator. Background Technology

[0002] This paper proposes a novel method for measuring and locating hydrogen leaks. Generators are core components of power systems, and monitoring their operational status is crucial. Hydrogen leaks are a common fault in hydrogen-cooled steam turbine generators, characterized by difficulty in detection and significant safety hazards. Real-time monitoring and early alarm for hydrogen leaks are necessary. Existing technologies mainly rely on hydrogen content detection in the internal cooling water tank and flow meters for overall monitoring, but these methods suffer from the following problems: they cannot pinpoint the specific leaking rod, require shutdown for airtightness testing, are time-consuming, and do not fully utilize existing data for analysis. Utility Model Content

[0003] The purpose of this invention is to provide a device for diagnosing and accurately locating hydrogen leaks in the stator bars of a steam turbine generator, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a device for diagnosing and precisely locating hydrogen leaks in the stator bars of a steam turbine generator, comprising a generator containing hydrogen gas, and further comprising:

[0005] Stator conductor bars, which are disposed on the generator;

[0006] A temperature data measuring instrument, wherein the temperature data measuring instrument is mounted on the stator bar;

[0007] A data acquisition device is mounted on the stator bar and connected to the temperature data measuring instrument;

[0008] A water tank, which is connected to the generator;

[0009] A flow data measuring instrument is installed on the water tank.

[0010] Preferably, the stator bars transmit the temperature of the generator, and the temperature data measuring instrument is used to measure the temperature of the stator bars and acquire data.

[0011] Preferably, the stator bar is further provided with a water pipe connection, which is connected to the temperature data measuring instrument.

[0012] Preferably, the flow data measuring instrument is used to measure the hydrogen flow rate of the generator.

[0013] Preferably, the data acquisition device is used to aggregate the data measured by the temperature data measuring instrument and the flow data measuring instrument, and to perform data analysis.

[0014] Preferably, the water pipe connection is connected to the water tank.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: This turbine generator stator bar hydrogen leakage diagnosis and precise positioning device does not require additional equipment on each stator bar, reducing the difficulty and risk of monitoring, making full use of existing data, and improving detection efficiency; by combining temperature data and hydrogen leakage data for calculation, it effectively avoids the misjudgment problem that may occur when diagnosing with a single data source, improving the accuracy of measurement; if used as an input end for online real-time monitoring, it eliminates the need to maintain non-positioning stator bars, reducing the workload of on-site maintenance personnel. Attached Figure Description

[0016] Figure 1 This is a diagram of a device for diagnosing and precisely locating hydrogen leaks in the stator bars of a steam turbine generator.

[0017] In the diagram: 1. Temperature data measuring instrument; 2. Flow data measuring instrument; 3. Data acquisition equipment; 4. Stator bar; 5. Water pipe connection; 6. Water tank. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1 This utility model provides a technical solution: a device for diagnosing and accurately locating hydrogen leaks in the stator bars of a steam turbine generator, comprising a generator containing hydrogen gas, and further comprising:

[0020] Stator bar 4 is a core component of the stator winding of the turbine generator, directly participating in the electromagnetic energy conversion process inside the generator. Its operating state is closely related to the overall safe and stable operation of the generator. Stator bar 4 is located on the generator, specifically installed in the slots of the generator stator core, providing key structural support for the generator to achieve power output. Temperature data measuring instrument 1 is a dedicated device for collecting temperature information of the turbine generator stator bar 4. It must be able to adapt to complex internal operating conditions of the generator, such as electromagnetic interference, and a certain temperature range, to ensure the stability of temperature data acquisition. Temperature data measuring instrument 1 is located on stator bar 4, and according to the claims and specification, it is specifically installed at the end of stator bar 4. This installation position can effectively acquire the temperature signal of stator bar 4 and facilitates connection with subsequent data acquisition equipment 3. Stator bar 4 transmits the temperature of the generator because it generates heat due to its own losses during generator operation. Temperature changes directly reflect the internal thermal conditions of the generator, thus serving as a key carrier for transmitting generator temperature. The internal temperature status is transmitted to the temperature data measuring instrument 1, which measures the temperature of the stator winding 4 and acquires data. This data will be crucial for determining whether the stator winding 4 has a hydrogen leakage fault, and will be compared and analyzed with the temperature baseline value collected during fault-free operation. The stator winding 4 also has a water pipe connection 5, which is an important interface of the stator winding 4 cooling system, connected to the generator's internal cooling water system. This provides a necessary channel for heat dissipation during stator winding 4 operation. The water pipe connection 5 is connected to the temperature data measuring instrument 1. As explicitly stated in the claim, the temperature data measuring instrument 1 is installed at the water pipe connection 5 at the end of the stator winding 4. This connection method ensures that the temperature data measuring instrument 1 acquires more accurate temperature information related to the stator winding 4, providing a reliable data source for subsequent data analysis.

[0021] During the operation of the steam turbine generator, the stator bars 4, which are the core components of the generator stator winding and are installed in the stator core slots, generate heat due to their own operating losses, reflecting the internal thermal conditions of the generator. The water pipe connection 5 at their ends serves as an important interface to the cooling system, connecting to the internal cooling water system for heat dissipation. A temperature data measuring instrument 1, used to collect temperature information from the stator bars 4 and possessing resistance to complex operating conditions, is installed on the stator bars 4 and connected to the water pipe connection 5. This allows for effective acquisition of the temperature data of the stator bars 4 and transmission to the data acquisition device. 3; The data acquisition device 3 first uses the temperature of each stator bar collected by the temperature data measuring instrument 1 when the generator is running without faults as the temperature reference value, and combines it with the hydrogen flow rate collected by the flow data measuring instrument 2 as the leakage reference value. When the generator is running, if the hydrogen leakage measured by the flow data measuring instrument 2 is higher than the leakage reference value, it is determined that a hydrogen leakage phenomenon has occurred. At this time, the temperature data of the stator bar 4 collected in real time by the temperature data measuring instrument 1 is analyzed. If the temperature data of a certain stator bar 4 is higher than the temperature reference value, the hydrogen leakage fault of that stator bar 4 can be located.

[0022] Data acquisition device 3 is mounted on the stator bar 4 and connected to the temperature data measuring instrument 1. It also connects to the flow data measuring instrument 2 installed at the water tank 6, ensuring simultaneous reception of real-time data from both monitoring devices to avoid delays in diagnostic timeliness. Data acquisition device 3 is used to summarize and analyze the data measured by the temperature data measuring instrument 1 and the flow data measuring instrument 2. The summarized data specifically includes: temperature data of each stator bar 4 collected by the temperature data measuring instrument 1 at the water pipe connection 5 at the end of the stator bar 4, and hydrogen flow data collected by the flow data measuring instrument 2 at the water tank 6. The data analysis process strictly follows a preset logic, specifically:

[0023] When the turbine generator is running without faults, it receives all the temperature data of the stator bars 4 collected by the temperature data measuring instrument 1 and sets this set of data as the temperature reference value.

[0024] Simultaneously receive hydrogen flow data collected by flow data measuring instrument 2, and set this data as the leakage reference value;

[0025] When the steam turbine generator is running normally, the current hydrogen leakage data transmitted by the flow data measuring instrument 2 is compared with the leakage reference value in real time. If the current data is higher than the reference value, it is determined that the generator has a hydrogen leakage phenomenon.

[0026] After determining that a leak has occurred, the current temperature data of each stator bar 4 transmitted by the temperature data measuring instrument 1 is further compared with the temperature reference value. If the temperature data corresponding to a certain stator bar 4 is higher than the reference value, the stator bar 4 is accurately located as the hydrogen leak fault point.

[0027] Meanwhile, according to specific implementation requirements, when the detected hydrogen leakage exceeds the benchmark value by 0.3 cubic meters per day, a hydrogen leakage fault judgment will be immediately triggered; if the leakage exceeds 5 cubic meters per day, a warning message of "immediate shutdown required" will be generated simultaneously to ensure the safe operation of the generator.

[0028] The data acquisition device 3, installed on the stator bar 4, is connected to both the temperature data measuring instrument 1 and the flow data measuring instrument 2 installed in the water tank 6. It can simultaneously receive real-time data from both monitoring devices to avoid transmission delays affecting diagnostic timeliness. During the fault-free operation phase of the turbine generator, it first receives all temperature data from the stator bar 4 collected by the temperature data measuring instrument 1 from the water pipe connection 5 at the end of the stator bar 4 and sets it as the temperature reference value. Simultaneously, it receives hydrogen flow data collected by the flow data measuring instrument 2 at the water tank 6 and sets it as the leakage reference value. After the turbine generator returns to normal operation, the data acquisition device 3 will summarize the measurements from the temperature data measuring instrument 1 and the flow data measuring instrument 2 in real time. The system measures and analyzes the data. First, it compares the current hydrogen leakage data transmitted by the flow data measuring instrument 2 with the leakage reference value. If the current data is higher than the reference value, especially when the leakage exceeds the reference value by 0.3 cubic meters per day, a hydrogen leakage fault determination is immediately triggered. After a leak is determined, the data acquisition device 3 further compares the current temperature data of each stator bar 4 transmitted by the temperature data measuring instrument 1 with the temperature reference value one by one. If the temperature data corresponding to a certain stator bar 4 is higher than the reference value, the stator bar 4 can be accurately located as the hydrogen leakage fault point. If the leakage is subsequently detected to exceed 5 cubic meters per day, a warning message of "immediate shutdown required" will be generated simultaneously to ensure the safe operation of the generator.

[0029] Water tank 6 is connected to the generator and is the core water storage component of the generator's internal cooling water system. It is directly connected to the cooling circuit of the generator stator bars 4. Its main function is to store and circulate the cooling water required for heat dissipation during the operation of the stator bars 4. Simultaneously, if hydrogen leaks from the stator bars 4, the leaked hydrogen will seep into the cooling circuit and flow with the cooling water to the water tank 6. Therefore, water tank 6 is also a key physical node for monitoring hydrogen leaks in the generator. Flow data measuring instrument 2 is installed on water tank 6, specifically at the fluid inlet / outlet or a pre-set flow monitoring point, to ensure accurate collection of flow data related to hydrogen leaks. This device needs to be connected to data acquisition equipment 3 to achieve real-time transmission of measurement data. Flow data measuring instrument 2 is used to measure the hydrogen flow rate of the generator. The measurement process must follow a preset procedure: When the turbine generator is running without faults, the collected hydrogen flow data will be transmitted to the data acquisition device 3 as the "leakage reference value"; when the generator is running normally, the hydrogen flow data is collected in real time and sent to the data acquisition device 3 simultaneously. In actual measurement, the flow data at both ends of the water tank 6 must be read and the difference calculated to accurately obtain the real hydrogen leakage data; when the leakage data is higher than the "leakage reference value", the data acquisition device 3 will initially determine that there is a hydrogen leakage in the generator. According to specific implementation requirements, if the leakage is 0.3 cubic meters / day higher than the reference value, a leakage fault judgment will be triggered. If the leakage further exceeds 5 cubic meters / day, the data transmitted by the device will become the core basis for the data acquisition device 3 to generate an "immediate shutdown" warning message.

[0030] The water tank 6, connected to the generator, serves as the core water storage component of the generator's internal cooling water system. It is directly connected to the cooling circuit of the generator stator bars 4, storing and circulating the cooling water required for heat dissipation during stator bar 4 operation. Furthermore, if hydrogen leaks from the stator bars 4, the leaked hydrogen will seep into the cooling circuit and flow with the cooling water to the water tank 6, making it a critical physical point for monitoring hydrogen leaks in the generator. The flow data measuring instrument 2, specifically installed at the fluid inlet / outlet or pre-set flow monitoring points on the water tank 6, connects to the data acquisition device 3 to achieve real-time data transmission and measures the generator's hydrogen flow rate. Its measurement process follows a pre-set procedure: During fault-free operation of the turbine generator... During operation, the collected hydrogen flow rate data is transmitted to the data acquisition device 3 as the "leakage baseline value". When the generator is running normally, the hydrogen flow rate data is collected in real time and sent to the data acquisition device 3 simultaneously. In actual measurement, the flow rate data at both ends of the water tank 6 is read and the difference is calculated to accurately obtain the real hydrogen leakage data. When the leakage data is higher than the "leakage baseline value", the flow data measuring instrument 2 will cooperate with the data acquisition device 3 to preliminarily determine that there is a hydrogen leakage in the generator. If the leakage is 0.3 cubic meters / day higher than the baseline value, a leakage fault judgment is triggered. If the leakage further exceeds 5 cubic meters / day, the data transmitted by the device will also become the core basis for the data acquisition device 3 to generate a "must be shut down immediately" warning message.

[0031] When the hydrogen leakage diagnosis and precise location device for the stator windings of a steam turbine generator is used, the stator windings 4, which are the core components of the generator stator windings and are installed in the stator core slots, generate heat due to their own losses during operation, reflecting the internal thermal conditions of the generator. The water pipe connection 5 at their ends serves as an important interface of the cooling system and is connected to the generator's internal cooling water system to achieve heat dissipation. The temperature data measuring instrument 1, which is used to collect the temperature information of the stator windings 4 and has complex operating conditions such as anti-electromagnetic interference, is installed on the stator windings 4 and connected to the water pipe connection 5, so as to accurately obtain the temperature data of each stator winding 4. At the same time, the water tank 6, which is connected to the generator and serves as the core water storage component of the internal cooling water system, is connected to the cooling circuit of the stator windings 4 to store and circulate cooling water, and can also collect hydrogen gas that seeps into the cooling circuit after the stator windings 4 leak. The flow data measuring instrument 2, installed at the fluid inlet and outlet of the water tank 6 or at the preset monitoring points, can read the flow rate at both ends of the water tank 6. The system collects and calculates the difference to obtain the actual hydrogen flow rate data. The data acquisition device 3, located on the stator bars 4, is connected to both the temperature data measuring instrument 1 and the flow data measuring instrument 2 to simultaneously receive two types of real-time data. First, when the generator is running without faults, the temperature of each stator bar 4 collected by the temperature data measuring instrument 1 is set as the temperature reference value, and the hydrogen flow rate collected by the flow data measuring instrument 2 is set as the leakage reference value. After the generator is running normally, the data acquisition device 3 summarizes and analyzes the two types of data in real time. It first compares the current hydrogen leakage rate with the leakage reference value. If the current data is higher than the reference value, especially exceeding it by 0.3 cubic meters per day, a hydrogen leak is determined. Then, it compares the current temperature of each stator bar 4 with the temperature reference value. If the temperature of a certain stator bar 4 is higher than the reference value, it accurately locates the leak fault point. If the leakage rate further exceeds 5 cubic meters per day, a warning message of "immediate shutdown required" will be generated simultaneously to ensure the safe operation of the generator.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for diagnosing and accurately locating hydrogen leakage from a stator bar of a turbogenerator, comprising a generator, said generator having hydrogen gas therein, characterized by, Also includes: Stator bar (4), the stator bar (4) is provided on the generator; Temperature data measuring instrument (1), the temperature data measuring instrument (1) is mounted on the stator bar (4); Data acquisition device (3), the data acquisition device (3) is mounted on the stator bar (4) and connected to the temperature data measuring instrument (1); Water tank (6), which is connected to the generator; Flow data measuring instrument (2), which is installed on the water tank (6).

2. A device for diagnosing and accurately locating hydrogen leakage of a stator bar of a turbogenerator according to claim 1, characterized in that: The stator bar (4) transmits the temperature of the generator, and the temperature data measuring instrument (1) is used to measure the temperature of the stator bar (4) and obtain data.

3. The apparatus for diagnosing and accurately locating hydrogen leakage of a stator bar of a turbogenerator according to claim 1 or 2, characterized in that: The stator bar (4) is also provided with a water pipe connection (5), which is connected to the temperature data measuring instrument (1).

4. A device for diagnosing and accurately locating hydrogen leakage of a stator bar of a turbogenerator according to claim 3, characterized in that: The flow data measuring instrument (2) is used to measure the hydrogen flow rate of the generator.

5. A device for diagnosing and accurately locating hydrogen leakage of a stator bar of a turbogenerator according to claim 1, characterized in that: The data acquisition device (3) is used to summarize the data measured by the temperature data measuring instrument (1) and the flow data measuring instrument (2) and perform data analysis.

6. The device for diagnosing and precisely locating hydrogen leaks in the stator windings of a steam turbine generator according to claim 3, characterized in that: The water pipe connection (5) is connected to the water tank (6).

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