CN-224233334-U - FSSS device power protection system and control cabinet

Abstract

The utility model relates to the technical field of boiler furnace safety monitoring systems (FSSS) of thermal power plants, in particular to a power supply protection system and a control cabinet of an FSSS device. The utility model provides a power supply protection system of an FSSS device, which comprises an anode and a cathode, wherein two first normally-closed relays connected in series are arranged between the anode and the cathode and are in communication connection with an alternating current power supply, the first normally-closed relays are connected in parallel with two second normally-closed relays connected in series and are in communication connection with a system power supply, the first normally-closed relays are connected in parallel with two third normally-closed relays connected in series and are in communication connection with a field power supply, and the first normally-closed relays are connected in parallel with two fourth normally-closed relays connected in series and are in communication connection with a query power supply. The technical problem of no power failure tripping function in the prior art is solved.

Inventors

• WU MINGHU
• DAI XIHUI
• WU YONGFENG
• KE WENHUI
• Luo Tingxiao
• HUANG SHANGJI

Assignees

• 广东粤电博贺能源有限公司

Dates

Publication Date

20260512

Application Date

20250403

Claims (7)

1. 1. A power supply protection system of an FSSS device is characterized by comprising an anode and a cathode, wherein two first normally closed relays connected in series are arranged between the anode and the cathode and are in communication connection with an alternating current power supply, the first normally closed relays are connected in parallel with two second normally closed relays connected in series and are in communication connection with a system power supply, the first normally closed relays are connected in parallel with two third normally closed relays connected in series and are in communication connection with a field power supply, and the first normally closed relays are connected in parallel with two fourth normally closed relays connected in series and are in communication connection with a query power supply.
2. 2. The FSSS device power supply protection system of claim 1, wherein the AC power supply is 220VAC, the system power supply is 24VDC, the field power supply is 24VDC, and the query power supply is 48VDC.
3. 3. The power protection system of the FSSS device according to claim 1, wherein the power failure alarm signals of the alternating current power supply, the system power supply, the field power supply and the query power supply are connected to the DCS system and are connected with an audible and visual alarm in a communication way.
4. 4. The power protection system of an FSSS device according to claim 1, wherein the AC power source, system power source, field power source, and query power source are connected to the MFT cabinet.
5. 5. A control cabinet is characterized by comprising a cabinet body (1) and a radiating plate (2) arranged on the back of the cabinet body (1), wherein radiating holes (21), a track (22), radiating fins (23) movably arranged on the track (22) and fin strips (24) arranged on the radiating fins (23) are arranged on the radiating plate (2).
6. 6. A control cabinet according to claim 5, characterized in that the cabinet body (1) is provided with a housing (3) for placing the cooling fins (23), and the housing (3) is provided with a partition plate (31) forming a channel for receiving the cooling fins (23).
7. 7. A control cabinet according to claim 5, characterized in that the track (22) comprises a plurality of annular tracks (221) and inclined tracks (222) for connecting the annular tracks (221).

Description

FSSS device power protection system and control cabinet Technical Field The utility model relates to the technical field of boiler furnace safety monitoring systems (FSSS) of thermal power plants, in particular to a power supply protection system and a control cabinet of an FSSS device. Background FSSS is a safety monitoring system FSSS (Furnace Safeguard Supervisory System) for boiler furnace, which can make all the equipment in the boiler combustion system safely start (throw) and stop (cut) according to the specified operation sequence and condition, and can quickly cut off all the fuel (including ignition fuel) entering the boiler furnace under critical working condition, so as to prevent destructive accidents of deflagration, explosion and the like, and ensure the safety of furnace. MFT is the main fuel trip MFT (Main Fuel Trip), which is the main protection of the boiler. The boiler furnace safety monitoring system of the thermal power plant, which is called FSSS for short, is an important protection system of the boiler of the power plant. The system is designed with the design specification issued by the national energy agency, namely the technical specification DL/T1091-2018 of the boiler furnace safety monitoring system of the thermal power plant, which is hereinafter referred to as the specification. The rules always specify that the system should be able to recognize the types of faults of a) power failure, b) communication failure, c) processor failure, d) input and output module failure. The system design should also include the following functions, I/O and electrical power off and on contacts should be set to ensure that the equipment controlled by the system is in a safe state or the working state required by the safe operation of the unit when the system is powered off. The trip system design should meet the requirement that the MFT trip system should issue a boiler trip signal when power is lost. While the required power for the FSSS controller is a 220VAC ac-to-dc converted low voltage 24VDC, 48VDC power supply. When the AC/DC power supply converter fails, the FSSS controller fails, or cannot output a protection signal, or cannot acquire a tripping signal from the site, so that serious protection refusal is caused, and the design requirement of regulations is not met. Therefore, it is necessary to provide a power protection system and a control cabinet for realizing the FSSS protection device with the power-failure tripping function. Disclosure of Invention The utility model aims to overcome the defects of the prior art, and provides a power supply protection system and a control cabinet of an FSSS device, which aim to solve the technical problem of no power-failure tripping function in the prior art. The utility model provides a power protection system of an FSSS device, which comprises an anode and a cathode, wherein two first normally-closed relays connected in series are arranged between the anode and the cathode and are in communication connection with an alternating current power supply, the first normally-closed relays are connected in parallel with two second normally-closed relays connected in series and are in communication connection with a system power supply, the first normally-closed relays are connected in parallel with two third normally-closed relays connected in series and are in communication connection with a field power supply, and the first normally-closed relays are connected in parallel with two fourth normally-closed relays connected in series and are in communication connection with a query power supply. Preferably, the AC power source is 220VAC, the system power source is 24VDC, the field power source is 24VDC, and the query power source is 48VDC Preferably, the power failure alarm signals of the alternating current power supply, the system power supply, the field power supply and the query power supply are connected to the DCS system and are connected with an audible and visual alarm in a communication mode. Preferably, the alternating current power supply, the system power supply, the field power supply and the query power supply are connected to the MFT cabinet. The utility model also provides a control cabinet for installing the FSSS device power supply protection system, which comprises a cabinet body and a heat radiation plate arranged on the back of the cabinet body, wherein the heat radiation plate is provided with heat radiation holes, a track, a heat radiation plate movably arranged on the track and a fin bar arranged on the heat radiation plate Preferably, a housing for placing the cooling fins is arranged on the cabinet body, and a partition plate forming channel is arranged on the housing for accommodating the cooling fins. Preferably, the track includes a plurality of circular tracks and inclined tracks for connecting the circular tracks. Compared with the prior art, the FSSS device power supply protection system and the control cabinet have the be