阅读说明：本技术 一种用于半潜平台不间断供电的Essential供配电系统 (Essential power supply and distribution system for uninterrupted power supply of semi-submersible platform ) 是由 蔡连博 刘树慰 杜银昌 徐建东 王会峰 蔡元浪 王海云 黄波 吴占友 刘洋 张永 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种用于半潜平台不间断供电的Essential供配电系统,主电源的输出端和低压配电系统的第一输入端相连,低压配电系统的第二输入端和第一发电设备相连；主电源的输出端和应急低压配电系统的第一输入端相连,应急低压配电系统的第二输入端和第二发电设备相连；正常状况下,主发电设备向主电源供电,主电源分别向低压配电系统和应急低压配电系统供电；主电源供电失效时,第一发电设备和第二发电设备可分别向低压配电系统和应急低压配电系统供电；第一发电设备和第二发电设备均能够带动主发电设备启动。本发明可实现Essential供配电系统的不间断供电。(The invention discloses an Essential power supply and distribution system for uninterrupted power supply of a semi-submersible platform, wherein the output end of a main power supply is connected with the first input end of a low-voltage power distribution system, and the second input end of the low-voltage power distribution system is connected with first power generation equipment; the output end of the main power supply is connected with the first input end of the emergency low-voltage power distribution system, and the second input end of the emergency low-voltage power distribution system is connected with the second power generation equipment; under normal conditions, the main power generation equipment supplies power to a main power supply, and the main power supply supplies power to a low-voltage power distribution system and an emergency low-voltage power distribution system respectively; when the power supply of the main power supply fails, the first power generation equipment and the second power generation equipment can respectively supply power to the low-voltage power distribution system and the emergency low-voltage power distribution system; the first power generation equipment and the second power generation equipment can both drive the main power generation equipment to start. The invention can realize uninterrupted power supply of the Essential power supply and distribution system.)

1. An Essential power supply and distribution system for uninterrupted power supply of a semi-submersible platform is characterized in that: the emergency low-voltage power distribution system comprises a main power supply, a low-voltage power distribution system and an emergency low-voltage power distribution system;

the output end of the main power supply is connected with the first input end of the low-voltage distribution system, and the second input end of the low-voltage distribution system is connected with the first power generation equipment;

the output end of the main power supply is connected with the first input end of the emergency low-voltage power distribution system, and the second input end of the emergency low-voltage power distribution system is connected with the second power generation equipment;

under normal conditions, the main power generation equipment supplies power to a main power supply, and the main power supply supplies power to a low-voltage power distribution system and an emergency low-voltage power distribution system respectively;

when the power supply of the main power supply fails, the first power generation equipment and the second power generation equipment can respectively supply power to the low-voltage power distribution system and the emergency low-voltage power distribution system;

the first power generation equipment and the second power generation equipment can both drive the main power generation equipment to start.

2. An Essential power supply and distribution system for the uninterruptible power supply of semi-submersible platforms as recited in claim 1 wherein the loads of the low voltage distribution system include normal lighting systems, ventilation equipment, inert gas systems, and air compressor systems.

3. The Essential power supply and distribution system for uninterruptible power supply of semi-submersible platforms as claimed in claim 1, wherein: the load of the emergency low-voltage power distribution system comprises an emergency lighting system, an internal communication system, a pressure discharge load control system, a UPS system, a pressure discharge load pump and the like.

4. The Essential power supply and distribution system for uninterruptible power supply of semi-submersible platforms as claimed in claim 1, wherein: the second power generation system is provided with an automatic starting device, the energy storage capacity of the automatic starting device can continuously start the power generation equipment for at least 3 times, and a second set of starting energy is arranged, and the automatic starting device can be started for 3 times within 30 minutes.

5. The Essential power supply and distribution system for uninterruptible power supply of semi-submersible platforms as claimed in claim 1, wherein: when the power supply of the main power supply fails, the first power generation equipment and the second power generation equipment simultaneously supply power to the low-voltage power distribution system and the emergency power distribution system respectively.

6. An Essential power supply and distribution system for uninterruptible power supply of a semi-submersible platform as claimed in claim 5, wherein: the first and second power generation devices are automatically started within 30 seconds, up to 45 seconds.

7. The Essential power supply and distribution system for uninterruptible power supply of semi-submersible platforms as claimed in claim 1, wherein: the first power generation device is an emergency generator and the second power generation device is an emergency generator, both of which are diesel generators.

Technical Field

The invention relates to the field of semi-submersible platform power distribution, in particular to an Essential power supply and distribution system for uninterrupted power supply of a semi-submersible platform in the field of ocean engineering.

Background

ABS "MODU" standard proposes the concept of Essential load, and for the unpowered semi-submersible production platform, the Essential load mainly includes: 1. equipment threatening the safety of the platform after loss, such as a pressure-discharge load pump, a ventilation system and the like, and related matched systems; 2. non-continuous operation equipment for ensuring the safety of the platform, such as an air compressor, a lighting system, an inert gas system and the like, and related matched systems; 3. an emergency device. And requires that the power system be designed to ensure power continuity of the Essential load. That is, when one generator fails, it should be ensured that the utility load is restored within 30 seconds up to 45 seconds.

Disclosure of Invention

The invention aims to provide an Essential power supply and distribution system for the uninterrupted power supply of a semi-submersible platform, which can ensure the uninterrupted power supply of Essential loads.

In order to solve the technical problem, the invention provides an Essential power supply and distribution system for the uninterrupted power supply of a semi-submersible platform, which comprises a main power supply, a low-voltage power distribution system and an emergency low-voltage power distribution system, wherein the main power supply is connected with the emergency low-voltage power distribution system through a power supply line;

the output end of the main power supply is connected with the first input end of the low-voltage distribution system, and the second input end of the low-voltage distribution system is connected with the first power generation equipment;

the output end of the main power supply is connected with the first input end of the emergency low-voltage power distribution system, and the second input end of the emergency low-voltage power distribution system is connected with the second power generation equipment;

under normal conditions, the main power generation equipment supplies power to a main power supply, and the main power supply supplies power to a low-voltage power distribution system and an emergency low-voltage power distribution system respectively;

when the power supply of the main power supply fails, the first power generation equipment and the second power generation equipment can respectively supply power to the low-voltage power distribution system and the emergency low-voltage power distribution system;

the first power generation equipment and the second power generation equipment can both drive the main power generation equipment to start.

Further, the loads of the low-pressure distribution system include a normal lighting system, a ventilation device, an inert gas system, an air compressor system and the like.

Further, the loads of the emergency low-voltage power distribution system comprise an emergency lighting system, an internal communication system, a pressure load discharge control system, a UPS system, a pressure load discharge pump and the like.

Furthermore, the second power generation system is provided with an automatic starting device, the energy storage capacity of the automatic starting device can continuously start the power generation equipment for at least 3 times, and a second set of starting energy is arranged, so that the automatic starting device can be started for 3 times within 30 minutes.

Furthermore, when the power supply of the main power supply fails, the first power generation equipment and the second power generation equipment simultaneously supply power to the low-voltage power distribution system and the emergency power distribution system respectively.

Further, the first power generation device and the second power generation device are automatically started within 30 seconds and at most 45 seconds.

Further, the first power generation device and the second power generation device are both provided with power generators.

The invention has the technical effects that: the invention solves the problem of power supply continuity of the Essential load in a most economical and effective mode, saves the occupation of the deck area of the platform, reduces the weight of the platform, realizes the capacity sharing of the emergency generator, and saves the inspection and system maintenance work in the later operation process.

Drawings

FIG. 1 is a flow chart of the emergency power supply startup of the Essential power supply and distribution system for the uninterruptible power supply of the semi-submersible platform of the present invention;

FIG. 2 is a circuit diagram of the present invention of an Essential power supply and distribution system generator system for uninterruptible power supply for semi-submersible platforms.

Detailed Description

The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.

In an embodiment, as shown in fig. 1 and fig. 2, an Essential power supply and distribution system for uninterruptible power supply of a semi-submersible platform includes a power supply, a low-voltage power distribution system and an emergency low-voltage power distribution system;

the output end of the main power supply is connected with the first input end of the low-voltage distribution system, and the second input end of the low-voltage distribution system is connected with the first power generation equipment;

the output end of the main power supply is connected with the first input end of the emergency low-voltage power distribution system, and the second input end of the emergency low-voltage power distribution system is connected with the second power generation equipment;

under normal conditions, the main power generation equipment supplies power to a main power supply, and the main power supply supplies power to a low-voltage power distribution system and an emergency low-voltage power distribution system respectively;

when the power supply of the main power supply fails, the first power generation equipment and the second power generation equipment can respectively supply power to the low-voltage power distribution system and the emergency low-voltage power distribution system;

the first power generation equipment and the second power generation equipment can both drive the main power generation equipment to start.

The loads of the low-pressure distribution system comprise a normal lighting system, a ventilation device, an inert gas system, an air compressor system and the like.

The load of the emergency low-voltage power distribution system comprises an emergency lighting system, an internal communication system, a pressure discharge load control system, a UPS system, a pressure discharge load pump and the like.

The second power generation system is provided with an automatic starting device, the energy storage capacity of the automatic starting device can continuously start the power generation equipment for at least 3 times, and a second set of starting energy is arranged, and the automatic starting device can be started for 3 times within 30 minutes.

When the power supply of the main power supply fails, the first power generation equipment and the second power generation equipment simultaneously supply power to the low-voltage power distribution system and the emergency power distribution system respectively.

The first and second power generation devices are automatically started within 30 seconds, up to 45 seconds.

In this embodiment, the first power generation device is an Essential generator, which is an Essential diesel generator with a quick start capability, and is connected to an Essential low-voltage distribution board LB section busbar through a circuit breaker ACB-02, that is, a second input end of the low-voltage distribution system.

The second power generation equipment is an emergency generator which is a diesel generator and is connected with an LE section busbar of the emergency low-voltage distribution board through a circuit breaker ACB-04, namely the second input end of the emergency low-voltage distribution system.

When the power supply of the main power supply of the platform fails, the transformers TR-001 and TR-002 lose power, and the ACB-001, ACB-003 and ACB-007 are in undervoltage tripping. And the LB and LE section busbars lose power and respectively send busbar voltage loss signals to the Essential generator and the emergency generator.

The emergency generator and the sensing generator are automatically started after receiving the voltage loss signals, and after the stable voltage is established, closing signals are respectively sent to the circuit breakers ACB-002 and ACB-004. The automatic starting of the two generators and the closing of the corresponding circuit breakers are completed within 30 seconds and not more than 45 seconds at most, so that the power supply of a low-voltage power distribution system and an emergency low-voltage power distribution system is realized.

Both the Essential generator and the emergency generator have a black start function of the main power generation equipment. When the main power generation equipment needs to be started, the ACB-005 or ACB-007 can be manually switched on to supply power to the LC section busbar of the distribution board of the auxiliary equipment of the main generator, and the main power generation equipment is started.

Due to other working conditions, the low-voltage power distribution system and the emergency low-voltage power distribution system lose power, send the voltage loss signals to the first power generation equipment and the second power generation equipment, and start the first power generation equipment and the second power generation equipment. The first power generation device and the second power generation device can be started respectively or simultaneously according to the power loss condition.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.