Emergency interruption protection tripping device of steam turbine
By using a design that triggers at least two fault signals, combined with electrical protection panels, output cards, and logic gate circuits, the problems of false tripping and failure to trip in the generator fault tripping system are solved, thereby improving the stability and reliability of the device.
Patent Information
- Application Number
- CN202520474492.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2035-03-18
AI Technical Summary
Existing generator fault tripping systems are prone to false tripping and failure to trip, leading to instability and unreliability of the equipment.
The design employs at least two fault signal triggers. Through the combination of electrical protection panels, output cards, AND gate circuits, and OR NOT gate circuits, it ensures that at least two signals are triggered before the shutdown operation is performed, thus avoiding false tripping and failure of the trip protection.
This improves the stability and reliability of the device, effectively avoids the risk of false tripping and failure to trip protection, and ensures the reliable operation of the system.
Smart Images
Figure CN224006498U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automatic control technology, specifically to an emergency trip protection device for a steam turbine. Background Technology
[0002] The existing generator faults involve a single-point signal entering the ETS system to trigger tripping, which poses a risk of false tripping and failure to trip due to generator faults. Summary of the Invention
[0003] The purpose of this invention is to provide a turbine emergency trip protection trip device that can only achieve shutdown operation by being triggered by at least two fault signals, effectively avoiding the risk of trip protection failure and false trip, and improving the stability and reliability of the device.
[0004] This utility model is implemented as follows:
[0005] An emergency trip protection device for a steam turbine includes multiple electrical protection panels. Each electrical protection panel is connected to an output card for transmitting a fault trip protection signal for a generator-transformer unit. Each output card is connected to a number of AND gate circuits corresponding to the number of output cards. Each AND gate circuit is connected to two output cards. The output terminal of each AND gate circuit is connected to a shutdown output device through a NOR gate circuit.
[0006] Furthermore, each of the aforementioned electrical protection screens is independently connected to an output card.
[0007] Furthermore, the number of electrical protection screens is three, the number of output cards is three, and the number of AND gate circuits is three.
[0008] Compared with the prior art, the beneficial effects of this utility model are:
[0009] In practical applications, generator fault signals are transmitted to AND gate circuits via output cards connected to the electrical protection panel. The number of AND gate circuits is the same as the number of output cards, and each AND gate circuit is connected to two output cards. Each AND gate circuit is also connected to the shutdown output device via a NOR gate circuit. That is, at least two signals in the fault trip protection signal must be triggered to realize the turbine emergency trip system output operation and execute shutdown, effectively avoiding the risk of trip protection failure and false operation, and improving the stability and reliability of the device. This utility model requires at least two fault signals to trigger the shutdown operation, effectively avoiding the risk of trip protection failure and false operation, and improving the stability and reliability of the device. Attached Figure Description
[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0011] Figure 1 This is a schematic diagram of the logic for triggering an emergency trip signal for a steam turbine according to this utility model. Detailed Implementation
[0012] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0013] Please see Figure 1 An emergency trip protection device for a steam turbine includes multiple electrical protection panels. Each electrical protection panel is connected to an output card for transmitting a generator-transformer set fault trip protection signal. Each output card is connected to a number of AND gate circuits corresponding to the number of output cards. Each AND gate circuit is connected to two output cards. The output terminal of each AND gate circuit is connected to a shutdown output device through a NOR gate circuit.
[0014] In practical applications, generator fault signals are transmitted to AND gate circuits via output cards connected to the electrical protection panel. The number of AND gate circuits is the same as the number of output cards, and each AND gate circuit is connected to two output cards. Each AND gate circuit is also connected to the shutdown output device via a NOR gate circuit. That is, at least two signals in the fault trip protection signal must be triggered to realize the turbine emergency trip system output operation and execute shutdown, effectively avoiding the risk of trip protection failure and false operation, and improving the stability and reliability of the device. This utility model requires at least two fault signals to trigger the shutdown operation, effectively avoiding the risk of trip protection failure and false operation, and improving the stability and reliability of the device.
[0015] Please see Figure 1 Each of the aforementioned electrical protection panels is independently connected to an output card.
[0016] Each electrical protection panel outputs a fault signal through a separate output card, ensuring that the signal source and the output card are independent.
[0017] Please see Figure 1 The number of electrical protection screens is three, the number of output cards is three, and the number of AND gate circuits is three.
[0018] Please see Figure 1 The three independent generator-transformer fault trip protection signals (A, B, C) are selected by a two-out-of-three function to trigger the turbine emergency trip signal. The turbine emergency trip system output operation is only realized when at least two of the three fault trip protection signals A, B, and C are triggered. Please refer to Table 1. It is assumed that under fault conditions, the fault trip protection signals A, B, and C are at a high level (1). When the turbine emergency trip output state L is at a high level (1), the equipment is shut down.
[0019] Table 1. Turbine Emergency Trip 3-to-2 Input / Output Logic Table
[0020]
[0021] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A turbine emergency trip protection tripping device, characterized by: The utility model relates to a kind of generator transformer unit fault tripping protection signal transmission device, including multiple electric appliance protection screens, the electric appliance protection screen is connected with the output card for transmitting generator transformer unit fault tripping protection signal, the output card is connected with the number of and gate circuit corresponding to the number of the output card, any the and gate circuit is connected two the output card, and the output end of any the and gate circuit is connected with shutdown output device through or non gate circuit.
2. A turbine emergency trip protection tripping device according to claim 1, characterized in that, Any the electric appliance protection screen is independently connected with an output card.
3. A turbine emergency trip protection tripping device according to claim 2, characterized in that The number of the electric appliance protection screen is three, the number of the output card is three, and the number of the and gate circuit is three.