Gas turbine generator protection device

Abstract

The utility model relates to the technical field of automatic control, and discloses a gas turbine generator protection device which comprises a first protection system, a second protection system, a management system and an outlet relay, and the first protection system and the second protection system are both connected with the management system and the outlet relay. The first protection system and the second protection system are mutually independent, have the same structure and respectively comprise a protection CPU (Central Processing Unit), the protection CPU is connected with the management system, the protection CPU is connected with a digital-to-analog conversion module and an FPGA (Field Programmable Gate Array) module, the digital-to-analog conversion module is connected with a low-pass filter, and the FPGA module is connected with the outlet relay; the protection device has anti-maloperation and anti-refusal performance, avoids the problem that protection of the layer is completely quitted when any element of a hardware loop of the protection device is damaged, effectively guarantees safe operation of a protected object, and enables the protection device to have fault tolerance.

Description

TECHNICAL FIELD

[0001] The utility model relates to automatic control technical field, concretely is a gas turbine generator protection device. BACKGROUND

[0002] The protection system and the control system of the gas turbine are an integral whole. When the gas turbine is normally operated, the control system controls the gas turbine to operate under the required parameters. When the unit deviates from the normal operating parameters due to some unpredictable reasons, the protection system should alarm and indicate the cause of the fault so that the operating personnel can analyze the cause of the fault and eliminate the fault in time. When the key parameters of the gas turbine generator unit exceed the critical value or the control equipment fails to endanger the safe operation of the unit, the gas turbine generator protection device alarms and trips the unit by cutting off the gas turbine.

[0003] However, the hardware circuit of the existing gas turbine generator protection device will cause the protection of this layer to be completely withdrawn if any element is damaged, and the protected object loses protection, and the protection device does not have fault tolerance. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a gas turbine generator protection device with anti-misoperation and anti-refusal performance, avoiding the problem that any element damage of the hardware circuit of the protection device will cause the protection of this layer to be completely withdrawn, playing an effective protection role for the safe operation of the protected object, and making the protection device have fault tolerance.

[0005] The utility model is implemented as follows:

[0006] A gas turbine generator protection device, comprising a first protection system, a second protection system, a management system and an outlet relay, the first protection system and the second protection system are connected with the management system and the outlet relay, the first protection system and the second protection system are independent of each other and have the same structure, and each comprises a protection CPU, the protection CPU is connected with the management system, the protection CPU is connected with a digital-to-analog conversion module and an FPGA module, the digital-to-analog conversion module is connected with a low-pass filter, and the FPGA module is connected with the outlet relay.

[0007] Further, the first protection system and the second protection system each comprise a first inverter power supply.

[0008] Further, the two protection CPUs are each connected with a 485 serial port or an Ethernet communication port.

[0009] Further, the management system comprises a management CPU connected with the protection CPU, and the management CPU is connected with a second inverter power supply.

[0010] Compared with the prior art, the utility model has the advantages of

[0011] In actual application, the first protection system and the second protection system are independent and have the same structure, and the first protection system and the second protection system can respectively complete all software functions such as sampling, calculation, judgment, export, self-checking, fault information processing and fault recording; under the safety mechanism of ensuring that the export loop is floating and not electrified, the same information and data are simultaneously processed and judged by two protection systems which are the same but independent, and the "and" gate export, thereby effectively preventing the protection device from being misexported due to the damage of components in the hardware loop, and the device has redundancy; the first protection system and the second protection system are respectively self-checked by the corresponding protection CPU, the two protection CPUs are checked and detected by isolation, the reliability of the device operation is effectively improved, if one protection system fails, the corresponding protection CPU sends a fault alarm signal, and the corresponding protection system exits operation; meanwhile, the other normal protection system can operate independently and completely undertake all protection functions; the problem that the protection device exits the layer protection due to the damage of any component in the hardware loop is avoided, the safe operation of the protected object is effectively guaranteed, and the protection device has fault tolerance; the utility model has the functions of preventing misoperation and preventing refusal, the problem that the protection device exits the layer protection due to the damage of any component in the hardware loop is avoided, the safe operation of the protected object is effectively guaranteed, and the protection device has fault tolerance. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0013] Figure 1 It is the structural schematic diagram of the utility model;

[0014] Figure 2 It is the export mode schematic diagram of normal operation of the utility model.

[0015] Figure 3 It is the export mode schematic diagram of the first protection system fault exit of the utility model;

[0016] Figure 4 It is the export mode schematic diagram of the second protection system fault exit of the utility model. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0018] Please refer to Figures 1 to 4 The gas turbine generator protection device comprises a first protection system, a second protection system, a management system and an outlet relay, the first protection system and the second protection system are connected with the management system and the outlet relay, the first protection system and the second protection system are independent and identical in structure, and each comprises a protection CPU, the protection CPU is connected with the management system, the protection CPU is connected with a digital-to-analog conversion module and an FPGA module, the digital-to-analog conversion module is connected with a low-pass filter, and the FPGA module is connected with the outlet relay.

[0019] In actual application, the first protection system and the second protection system adopt the same running software as the prior art, the first protection system and the second protection system are independent and identical in structure, and the first protection system and the second protection system can respectively and independently complete all software functions such as sampling, calculation, judgment, outlet, self-checking, fault information processing and fault recording; under the safety mechanism of ensuring that the outlet loop is floating and not electrified, the same group of information and data is simultaneously processed and judged by two identical but independent protection systems under normal circumstances, please refer to Figure 2The first protection system and the second protection system are connected with the first protection system and the second protection system in series through an outlet relay in series, and an AND gate outlet is realized, so that the protection device is prevented from being misexported due to element damage in the hardware circuit, the device has redundancy, the first protection system and the second protection system are self-checked through corresponding protection CPUs, the two protection CPUs are checked and detected through isolation, the reliability of device operation is effectively improved, if one protection system fails, the corresponding protection CPU sends a fault alarm signal, and the corresponding protection system exits operation; meanwhile, the other normal protection system can operate independently and completely undertake all protection functions; the problem that the hardware circuit of the protection device is caused to exit the layer protection due to any element damage is avoided, the safe operation of the protected object is effectively guaranteed, and the protection device has fault tolerance; the utility model has the functions of anti-misoperation and anti-refusal, the problem that the hardware circuit of the protection device is caused to exit the layer protection due to any element damage is avoided, the safe operation of the protected object is effectively guaranteed, and the protection device has fault tolerance.

[0020] Please refer to Figure 1 The first protection system and the second protection system both comprise a first inverter power supply.

[0021] The first protection system and the second protection system are independently powered through the first inverter power supply of each, so that the stability of the protection device is effectively improved.

[0022] Please refer to Figure 1 Both of the protection CPUs are connected with a 485 serial port or an Ethernet communication port.

[0023] The two protection CPUs are connected with a DCS through the 485 serial port or the Ethernet communication port to realize information interaction.

[0024] Please refer to Figure 1 The management system comprises a management CPU connected with the protection CPU, and the management CPU is connected with a second inverter power supply.

[0025] The management CPU realizes information interaction with the two protection CPUs, man-machine interface control and communication with a power plant comprehensive automation monitoring system.

[0026] The above only describes preferred embodiments of the utility model and is not used for limiting the utility model, for those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A gas turbine generator protection device characterized by: The application relates to a protection system, which comprises a first protection system, a second protection system, a management system and an outlet relay, wherein the first protection system and the second protection system are connected with the management system and the outlet relay, the first protection system and the second protection system are independent and have the same structure, each of the first protection system and the second protection system comprises a protection CPU, the protection CPU is connected with the management system, the protection CPU is connected with a digital-analog conversion module and an FPGA module, the digital-analog conversion module is connected with a low-pass filter, and the FPGA module is connected with the outlet relay.

2. A gas turbine generator protection apparatus according to claim 1, wherein The first protection system and the second protection system each comprise a first inverter power supply.

3. A gas turbine generator protection apparatus according to claim 1 wherein, Each of the protection CPUs is connected with a 485 serial port or an Ethernet communication port.

4. A gas turbine generator protection apparatus according to claim 1 wherein, The management system comprises a management CPU connected with the protection CPU, and the management CPU is connected with a second inverter power supply.

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