Comprehensive charging system of large inland river electric ship

Abstract

The invention relates to a comprehensive charging system of a large inland river electric ship. The comprehensive charging system comprises a charging station, an outdoor integrated centralized shoreelectricity box and a charging gun module. The charging station provides an alternating current power supply and a direct current power supply to the outdoor integrated centralized shore electricity box and the charging gun module. The outdoor integrated centralized shore electricity box is used for collecting a wharf shore base alternating current power supply and direct current power supply, charging or supplying electricity to the ship in a centralized mode, and monitoring the charging or electricity supplying state. The charging gun module is used for enabling the integrated centralized shore electricity box to be in butt joint with the large pure electric ship and meanwhile conducting alternating current electricity supplying and direct current electricity supplying. By adopting the comprehensive charging system, the number of electricity transmission conducting wires required for direct current electricity transmission lines with the same transmission power is small, resistance heating and electric energy loss are small, reactive power loss of inductive reactance and capacitive reactance is avoided, the transmission power is greatly increased through reducing of the electricity transmission unit loss, and the energy saving effect in electricity transmission is improved.

Description

technical field [0001] This patent relates to the technical field of new energy sources for ships, in particular to a comprehensive charging system for large electric ships in inland rivers. Background technique [0002] As a new type of ocean or river transportation, electric ships have the advantages of saving energy, being quiet and not polluting water bodies, and will be widely used in the future. The existing electric boats are basically transformed on the existing hull, and the power mechanism is transformed into an electric or hybrid structure, but most of them use the electric motor as the auxiliary power, such as a special electric drive system for fine-tuning the boat when berthing. body. Pure electric boats are concentrated on small boats, such as speedboats. [0003] At present, some enterprises have begun to develop and build large-scale pure electric ships with a capacity of more than 1,000 tons in inland rivers. However, due to the constraints of the previou...

AI Technical Summary

Problems solved by technology

[0003] At present, some enterprises have begun to develop and build large-scale pure electric ships with a capacity of more than 1,000 tons in inland rivers. However, due to the constraints of the previous design and layout of existing port terminals, it is difficult to provide them with AC shore power boxes simply arranged on the shore. Large electric boats of this class provide high-capacity, long-distance charging power

At the same time, since other loading, unloading, lifting or transshipment equipment and facilities are often arranged along the shore base, the actual remaining and available space and area are limited, and it is impossible to arrange large-capacity charging stations nearby and on-site at the shore base side of the electric boat berth. Requirements for land occupation and volume of its charging equipment

[0004] The shortcomings and deficiencies of the existing AC shore power supply and DC charging pile technology: 1) The power supply system of AC power supply is single, and only three-phase three-wire AC power or AC variable frequency power supply is provided; 2) The applicable ship type and scope of application of AC power supply Narrow, it is only used as an alternative power source for daily electricity when diesel-powered ships are docked; 3) The power provided by the AC shore power box is relatively small, and it is mostly suitable for occasions where the capacity of AC power is not greater than 500kW; 4) It is currently used in electric The DC charging piles for car charging are mostly composed of precision electronic components, and their protection level is generally IP54. It is difficult to meet the technical conditions of IP56 or above for the outdoor layout of the port and wharf. The technical protection level of charging piles will double the unit construction cost, and the scale and quantity of charging piles required by large charging stations are often limited by the site conditions of the docks, and often cannot be installed in batches.

Therefore, from the perspective of the equipment itself, the current conventional electric vehicle charging piles on the market, in addition to their own protection performance not fully meeting the technical conditions for use in outdoor all-weather conditions, large electric ships with a thousand tons or more require shore-based In terms of charging capacity, the existing conditions of old port terminals do not have the environmental conditions for large-scale and mass installation of charging facilities on the shoreline.

Images