Ding Rongjun, academician of Chinese Academy of engineering and chief scientist of CRRC Zhuzhou Institute, said at the ship delivery ceremony and summit Technology Forum of DC networking electric propulsion system of luxury cruise line held on August 14"This is the first luxury offshore cruise ship in China with device level autonomous controllable electric / battery hybrid DC network electric propulsion system, setting a global precedent for the application of permanent magnet synchronous generator in ships."
August 14, surging news（ www.thepaper.cn ）The reporter learned that the "Dawan District No. 1" cruise ship was successfully delivered.
A new generation of electric drive
"Looking at Shenzhen at Sea" series of ships is a series of waterfront cruise ship projects built by Shekou ." Dawan District No .1" is a high-end diesel engine lithium battery hybrid cruise ship for the 40th anniversary of Shenzhen Special Economic Zone.
"Dawan District No.1" is 71.88 meters long, 18.72 meters wide, with 350 passengers and 14 knots operating speed. It can be used to watch Shenzhen's high-end tourism, business meetings and weddings at sea.
The ship is equipped with a 2MW class ship DC network electric propulsion system jointly developed by CRRC Zhuzhou Institute and China Merchants Group, with independent intellectual property rights. According to reports, the successful delivery of the ship means that the commercialization of China core, a high-end ship in China, has entered a new stage.
"The marine electric propulsion system can be said to be the" heart "of the ship, and the DC networking technology is the mainstream trend of the development of the marine electric propulsion technology." According to Feng Jianghua, deputy general manager and chief engineer of CRRC Zhuzhou Institute, ship electric propulsion system can be divided into AC networking electric propulsion and DC networking electric propulsion according to different networking modes. As a new generation of marine electric drive mode, DC networking technology avoids the frequency requirement of AC network, and enables the generator set to generate power at variable speed, thus achieving high efficiency, energy saving, energy-saving and high efficiency It has the characteristics of vibration reduction, space saving and multi energy grid connection.
"Dawan District No.1" cruise ship adopts hybrid DC network electric propulsion mode. Its 2MW permanent magnet synchronous generator and ship DC network frequency conversion and distribution integration device are transplanted with high-speed rail core technology, which can upgrade the ship's AC network to DC network, realize the grid connected power supply and power balance of the AC power supply of diesel generator unit and the DC power supply of power battery, so as to ensure the effective protection The dynamic stability of the ship is hindered. This kind of hybrid power can make the ships meet the standards of "ultra-low emission, ultra-low pollution and ultra-low noise", bring passengers a brand-new quiet and comfortable experience, and at the same time, it has an important demonstration significance to promote the green development and quality improvement of tourism traffic in Guangdong, Hong Kong and Macao.
A number of innovative technologies
Feng Jianghua said that "Dawan District No.1" cruise ship not only realizes "made in China" in terms of equipment, but also creates a number of world first examples in technology
Specifically, he said, the ship has overcome the technical problems and technical risks of Hybrid DC networking electric propulsion system based on permanent magnet technology, such as matching research, selective protection, system resonance control, etc., and innovated and adopted DC solid state circuit breaker, permanent magnet generator, power battery, permanent magnet motor and other technologies. Among them, the permanent magnet generator is the first one in the world, and the solid-state circuit breaker, as the DC bus tie switch of ship power grid, is the first independent research and development device in China. Through the short-circuit test verification of the real ship, it can realize the "microsecond level" protection when the DC power grid is short-circuit, and ensure the safety of the whole ship's electricity.
At present, the DC frequency conversion power distribution system, DC solid state switch, energy management system and permanent magnet synchronous generator developed by CRRC Zhuzhou have been approved by China Classification Society, and it is the second unit in China to approve the principle of ship DC electric propulsion system.
"The self-control rate of the system device reaches 100%, the space optimization layout is improved by more than 40%, and the energy-saving effect is more than 20% higher than that of the AC network electric propulsion system. A number of equipment have filled in the domestic gap, and the overall technology has reached the international leading level." Feng Jianghua said.
It is understood that marine electric propulsion system is widely used in high-end ships such as offshore engineering ships, wind power installation ships, business ships and luxury cruise ships. Among them, the DC network electric propulsion system technology has been in the application stage of batch shipment abroad, but it is still in the demonstration stage of inland river ships in China. The successful delivery of "Dawan District No.1" cruise ship has realized the first application of DC networking electric propulsion technology of hybrid power high-power ships in the marine luxury cruise ships, which will effectively boost the degree of autonomy of China's high-end ship core industry and equipment technology, and narrow the gap with foreign countries.
Ding Rongjun said, "Dawan District No.2 ship was officially started in June 2020. At present, the system has been fully promoted. CRRC has the advantages of independent controllable technology and electrical system solutions in the whole industry chain from chip device equipment system. We also look forward to transplanting high-speed rail technology into the field of ship and Ocean Engineering, which can bring more changes."
(surging journalist Yao Xiaolan)