WO2012122873A1 - 港口岸基变频供电系统 - Google Patents

港口岸基变频供电系统 Download PDF

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Publication number
WO2012122873A1
WO2012122873A1 PCT/CN2012/071448 CN2012071448W WO2012122873A1 WO 2012122873 A1 WO2012122873 A1 WO 2012122873A1 CN 2012071448 W CN2012071448 W CN 2012071448W WO 2012122873 A1 WO2012122873 A1 WO 2012122873A1
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WIPO (PCT)
Prior art keywords
power supply
ship
variable frequency
frequency power
shore
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PCT/CN2012/071448
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English (en)
French (fr)
Inventor
何银萍
王�锋
徐颖
卞琛
王发彬
刘方平
Original Assignee
荣信电力电子股份有限公司
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Publication of WO2012122873A1 publication Critical patent/WO2012122873A1/zh

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J3/00—Driving of auxiliaries
    • B63J3/04—Driving of auxiliaries from power plant other than propulsion power plant
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/40—Synchronising a generator for connection to a network or to another generator
    • H02J3/42—Synchronising a generator for connection to a network or to another generator with automatic parallel connection when synchronisation is achieved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J3/00—Driving of auxiliaries
    • B63J3/04—Driving of auxiliaries from power plant other than propulsion power plant
    • B63J2003/043—Driving of auxiliaries from power plant other than propulsion power plant using shore connectors for electric power supply from shore-borne mains, or other electric energy sources external to the vessel, e.g. for docked, or moored vessels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/40—The network being an on-board power network, i.e. within a vehicle
    • H02J2310/42—The network being an on-board power network, i.e. within a vehicle for ships or vessels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/49—Combination of the output voltage waveforms of a plurality of converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system

Definitions

  • the invention relates to a port shore based variable frequency power supply system. Background technique
  • the shore-based power supply can be used to supply the ship.
  • China's AC power frequency is 50Hz. If the ship is designed to use 60Hz power, 50Hz power can still be used for some shipboard equipment, such as lighting and heating equipment, but for motor-driven equipment such as pumps, winches and cranes, if it is not available Running at design speed will result in the device not working properly. Therefore, for a ship with a power system designed to be 6013 ⁇ 4, the premise of using shore-based power supply is to convert 50Hz AC to 60Hz AC to meet the power supply requirements of the ship design. Mm
  • the object of the present invention is to provide a port shore-based variable frequency power supply system, wherein the power supply of the power supply system is taken from a port high voltage substation, which greatly reduces environmental pollution and energy consumption generated by the ship's fuel generator set as a power source.
  • the system can continuously output three-phase AC with a voltage adjustment range of 0 ⁇ 6.6kV or 0 ⁇ 10kV and a frequency adjustment range of 0 ⁇ 60Hz, providing high quality and high reliability power for the boat.
  • a port shore based variable frequency power supply system including a variable frequency power supply, a port high voltage substation, a ship power receiving system, and an input end of the variable frequency power supply is connected to a port rolling substation, and an output end of the variable frequency power supply It is connected to the ship receiving system;
  • the power supply system can continuously output three-phase alternating current with a voltage adjustment range of 0 ⁇ 6.6kV or 0 ⁇ 10kV and a frequency adjustment range of 0 ⁇ 60Hz.
  • variable frequency power supply is connected to the port high voltage substation through a cable reel and an electric II connector.
  • variable frequency power supply The output side of the variable frequency power supply is connected to the distribution line through the cable reel, and the high voltage output is directly distributed to the power receiving system of the ship through the distribution line, and the low voltage output is distributed by the step reducing transformer for the ship receiving system.
  • the variable frequency power supply is composed of a phase shifting rectifier transformer and a plurality of power units, and the secondary side of the phase shifting rectifier transformer is composed of a plurality of different phase groups, each phase component is formed into three windings, and the Yanbian triangle connection method is adopted, and each phase group is formed.
  • the same phase power unit is sequentially connected in series to form a multi-level structure, and all the power units superposed in series in phase A, phase B, and phase C are connected in a star manner, and output a line voltage of 6.6 kV or 10 kV.
  • Ship load power supply is sequentially connected in series to form a multi-level structure, and all the power units superposed in series in phase A, phase B, and phase C are connected in a star manner, and output a line voltage of 6.6 kV or 10 kV.
  • the input side of the power unit is provided with a fuse for protection, and the rectifier side is composed of diodes Da, Db, Dc, Dd. D-e, Df to form a single-direction energy transfer rectifier circuit, and capacitor group C constitutes a DC filter link, capacitor Group C has a voltage equalizing discharge resistor R in parallel, and the inverter side is composed of a controllable power switching device VT-a, VT-b, VT-c, VT-d to form a 3-level voltage output.
  • Figure 1 is a schematic diagram of a system of a port shore based variable frequency power supply system
  • Figure 2 is a top view of a 6.6kV variable frequency power supply for a port shore based variable frequency power supply system
  • Figure 3 is a topographical diagram of a 10kV variable frequency power supply for a port shore based variable frequency power supply system
  • Figure 4 is a structural diagram of the power unit of the port shore-based variable frequency power supply system. detailed description
  • port shore-based variable frequency power supply system including port high-voltage substation A, input connection cable reel system 8, variable frequency power supply €, variable frequency power supply output side ring network cabinet D, shore side power box E, output connection cable reel F, distribution line 0, ship receiving system H.
  • the port high-voltage substation A supplies power to the entire shore-based variable frequency power supply system;
  • the input connection cable reel system B includes the cable reel 1 and the cable connector 2, and the cable reel 1 realizes the length of the free telescopic cable, and becomes the shore main power supply and the variable frequency power supply. hub.
  • variable frequency power supply C is connected to the port high voltage substation A through the cable reel 1 and the cable connector 2; the variable frequency power supply is the core part of the port shore based variable frequency power supply system, and the voltage and frequency can be adjusted, and the input can be 6kV (10kV) / 50Hz. AC power is converted to 0 ⁇ 6.6kV or 0 ⁇ 10kV/0 ⁇ 60Hz AC output.
  • the variable frequency power supply includes an input phase shifting rectifier transformer T, a power unit and a control system, and the variable frequency power supply can be installed in a container or installed indoors.
  • the ring network cabinet D is installed on the output side of the variable frequency power supply to realize the outlet power distribution. It can provide fault protection for the line and protect the operation safety of the power supply system.
  • the ring network cabinet has the measurement function of three-phase output voltage, current, power and so on.
  • the shore side power box ⁇ is connected to the ring network cabinet D, and the shore side power box ⁇ has a cable connector interface, and the frequency converter power supply C is connected to the power distribution line G through the cable connector 3 and the output connection cable reel F.
  • Cable reel F is a device that connects the shore connection point and the ship's power receiving system. The cable reel can meet the requirements of quick connection and storage. When not in use, it can be stored on the shore or directly mounted on the ship.
  • Distribution line G can achieve direct high voltage 6.6kV (10kV) power distribution, or reduce the 6.6kV (10kV) to 440V low voltage through the step-down transformer T1.
  • the variable frequency power supply C is connected to the ship receiving system through the distribution line G.
  • the direct high-voltage power distribution is realized through the distribution line G, or the 6.6kV (10kV) is reduced to 440V by the step-down transformer, and the input power is received.
  • Power receiving device of system H After the power of the port high-voltage substation A is regulated by the variable frequency power supply C, the direct high-voltage power distribution is realized through the distribution line G, or the 6.6kV (10kV) is reduced to 440V by the step-down transformer, and the input power is received. Power receiving device of system H.
  • the power receiving device of the ship receiving system is installed on the ship, and the ring network switching cabinet can also be used to realize seamless switching between the shore-based variable frequency power supply and the ship generator.
  • the protection system monitors the cable connector link. After confirming the error, disconnect the grounding switch Pl, P2, P3, P5 or Pl, P2, P4, P6 . The grounding system is disconnected. The switch S3 is closed and the high voltage variable frequency power supply is integrated into the public power grid.
  • Synchronous device detects the synchronization of the shore-based variable frequency power supply and the ship auxiliary generator, after the synchronization is completed, manual or self
  • the switch S6 or S7 is closed.
  • the shore-based variable frequency power supply is incorporated into the ship's power grid.
  • the protection system monitors possible faults during the operation of the shore-based variable frequency power supply system, such as: ground fault or short circuit fault.
  • the synchronous device detects the synchronization of the shore-based variable frequency power supply and the ship auxiliary generator. After the synchronization is completed, the switch S8, S9 or S 10, S ll is manually or automatically closed. Ship auxiliary generators are incorporated into the ship's power grid.
  • phase unit is connected in series, and the unit A1, the unit A2, the unit A3, the unit A4, the unit A5, and the unit A6 are connected in series, and the unit B1, the unit B2, the unit B3, the unit B4, the unit: B5, and the unit B6 are connected in series, the unit C1, The unit C2, the unit C3, the unit C4, the unit C5, and the unit C6 are connected in series.
  • Phase A, Phase B, and Phase C All units are connected in a star connection and directly output a line voltage of 6.6 kV to power the ship's load.
  • the port shore-based variable frequency power supply with output of 10kV/0 ⁇ 60H Z is connected to the port high voltage substation through the dry phase shifting rectifier transformer T.
  • the secondary side of the transformer is composed of 8 different phase groups, each phase component is 3
  • Each winding adopts a Yanbian triangle connection method, and each group of phase groups supplies power to the same group of units, for example; phase group 1 simultaneously supplies power to unit A1, unit B1, and unit C1.
  • the same phase unit is connected in series, for example: unit A1, unit A2, unit A3, unit A4, unit A5, unit A6, unit A7, unit A8 are connected in series. All units of phase A, phase B, and phase C are connected in a star manner, and directly output a line voltage of 10 kV to supply power to the ship's load.
  • the power unit input side fuses F l and F2 of the variable frequency power supply implement a protection function.
  • the rectifier side is composed of diodes Da, Db, Dc, Dd, De, Df to form a single-direction energy transfer rectifier circuit, capacitor group C constitutes a DC filter link, and resistor R achieves DC side voltage equalization and provides discharge for capacitor group C after the variable frequency power supply is stopped.
  • Channel, indirect protection device operation and personnel safety, inverter side controllable power switching devices VT-a, VT-b, VT-c, VT-d realize 3-level voltage output.

Description

港口岸基变頻供电系统 技术领域
本发明涉及一种港口岸基变频供电系统。 背景技术
随着国际经济贸易的发展， 世界海上航运交易量正逐年稳歩提高。 中国作为世界航运大 国之一， 意味着更多的航 g船舶将停靠中国港口。大多数船舶采用燃油发电机组作为电力來 源， 船舶在靠港停泊后， 船上辅助燃油发电机继续运转， 为船舶负荷供电。燃油作为一种化 学燃料，在其发生能量转换过程中会产生多种有害气体，如氣氧化物 (NOX)，硫氧化物( SOx)， 燃料燃烧颗粒物等。这些排放物对人的健康与周围环境会造成影响， 特别是产生的温室气体 会对地球臭氧层造成破坏。
为减少有害气体排放所造成的环境污染， 在船舶靠岸时，可采用岸基供电方式为泊船供 电。 中国交流电源频率为 50Hz,如果船舶被设计为使用 60Hz电能， 对于部分的船上设备仍可 以使用 50Hz电能， 如照明及加热设备， 但对电机驱动的设备如水泵、 绞车和起重机， 如果 无法在其设计速度运行， 将导致设备无法正常工作。 因此, 电力系统设计为 601¾的船舶， 采用岸基供电的前提是需要将 50Hz交流电转换为 60Hz交流电， 满足船舶设计的供电要求。 mm
本发明的目的是提供一种港口岸基变频供电系统，该供电系统的用电取自港口高压变电 站， 很大程度减小了船舶燃油发电机组作为电力来源产生的环境污染及能源消耗， 该供电系 统能够连续输出电压调节范围为 0〜6.6kV或 0〜10kV、 频率调节范围为 0〜60Hz的三相交 流电， 为泊船提供高质量、 高可靠性的电源。
为实现上述目的， 本发明通过以下技术方案实现- 港口岸基变频供电系统， 包括变频电源、港口高压变电站、 船舶受电系统， 变频电源的 输入端与港口髙压变电站相连， 变频电源的输出端与船舶受电系统相连； 该供电系统能够连 续输出电压调节范围为 0〜6.6kV或 0〜10kV、 频率调节范围为 0〜60Hz的三相交流电。
所述的变频电源通过电缆卷筒及电 II连接器与港口高压变电站相连接。
所述的变频电源输出侧通过电缆卷筒与配电线路连接，高压输出直接通过配电线路给船 舶受电系统配电， 低压输出经降压变压器后为船舶受电系统配电。 所述的变频电源由移相整流变压器、多个功率单元组成， 移相整流变压器副边由多个不 同相位组组成， 每个相位组分成 3个绕组， 采用延边三角接法， 每组相位组分别向同一组功 率单元供电， 同一相位功率单元依次串联叠加组成多电平结构， A相、 B相、 C相所有串联 叠加的功率单元以星形方式连接， 输出 6.6kV或 10kV线电压， 为船舶负载供电。
所述的功率单元输入侧设有起保护作用的熔断器，整流侧由二极管 D-a、 D-b、 D-c、 D-d. D- e、 D-f组成单方向能量传递整流电路， 电容组 C构成直流滤波环节， 电容组 C并联有均 压放电电阻 R, 逆变侧由可控功率开关器件 VT- a、 VT- b、 VT-c, VT- d组成 3电平电压输出。
与现有技术相比， 本发明的优点是-
1) 安全、 可靠、 方便地接入船舶；
2) 综合考虑供电接点数量、 安装位置、 供电容量、 走线等因素；
3) 较宽的电压和频率调节范围， 可实现稳压稳频输出；
4) 对岸上电网和船舶内网无谐波干扰影响；
5) 保证船用电与岸基电源相序和线制的一致性；
6) 具备缺相、 短路、 连锁等各种保护， 可靠安全供电；
7) 方便对靠港船舶接用岸基电源情况进行准确计量、 结算；
8) 适应码头高温、 高湿、 高腐蚀性等恶劣的环境；
9) 可采用移动式集装箱设计， 方便安装、搬运； 亦可采用固定式设计， 在室内安置岸基 电源系统的主要设备；
10)操作简单， 维护方便。
MHfifi
图 1是港口岸基变频供电系统的系统示意图；
图 2是港口岸基变频供电系统的 6.6kV变频电源拓扑图；
图 3是港口岸基变频供电系統的 10kV变频电源拓扑图；
图 4是港口岸基变频供电系统功率单元结构图。 具体实施方式
见图 1， 港口岸基变频供电系统， 包括港口高压变电站 A、 输入连接电缆卷筒系统8、 变频电源€、变频电源输出侧环网柜 D、岸侧接电箱 E、 输出连接电缆卷筒 F、配电线路0、 船舶受电系统 H。 港口高压变电站 A为整套岸基变频供电系统供电； 输入连接电缆卷筒系统 B包括电缆 卷筒 1和电缆连接器 2， 电缆卷筒 1实现自由伸缩电缆长度， 成为岸侧总电源与变频电源的 枢纽。
变频电源 C通过电缆卷筒 1及电缆连接器 2与港口高压变电站 A相连; 变频电源是港 口岸基变频供电系统的核心部分， 实现电压和频率可调节， 可将 6kV( 10kV)/50Hz输入的交 流电转换至 0〜6.6kV或 0〜10kV/0~60Hz交流电输出。 变频电源包含输入移相整流变压器 T、 功率单元及控制系统， 变频电源可安装于集装箱内或者安装于室内。
环网柜 D设置于变频电源输出侧，实现出线配电， 能为线路提供故障保护，保护供电系 统的运行安全， 环网柜具备三相输出电压、 电流、 功率等显示的计量功能。
岸侧接电箱 Ε与环网柜 D连接，岸侧接电箱 Ε具有电缆连接器接口，通过电缆连接器 3 及输出连接电缆卷筒 F， 变频电源 C与配电线路 G连接。 电缆卷筒 F为连接岸上连接点及 船舶受电系统间的设备， 电缆卷筒能够满足快速连接和储存的要求， 不使用的时候储存在岸 上或者直接安装至泊船上。
配电线路 G可实现直接高压 6.6kV( 10kV)配电，或通过降压变压器 T1将 6.6kV( 10kV) 降至 440V低压。 变频电源 C通过配电线路 G与船舶受电系统连接。
港口高压变电站 A的电能经变频电源 C进行电压、 频率调节输出后， 经配电线路 G实 现直接高压配电， 或通过降压变压器将 6.6kV ( 10kV ) 降至 440V低压后， 输入船舶受电系 统 H的受电装置。
船舶受电系统的受电装置安装于船上， 亦可采用环网切换柜， 实现岸基变频电源与船舶 发电机的无缝切换。
见图 1 , 本系统的工作过程是：
1 )高压 6.6kV ( lOkV)船舶靠岸后， 闭合接地开关 Pl、 P2、 P3和 P5。低压 440V船舶 靠岸后， 闭合接地开关 Pl、 P2、 P4、 P6。 船侧及岸上系统接地。
2) 系统接地后， 连接系统所有电力电缆及控制电缆。
3 ) 保护系统监测电缆接头链接情况， 确认无误后， 断开接地开关 Pl、 P2、 P3、 P5或 Pl、 P2、 P4、 P6? 接地系统断开。 闭合开关 S3 , 高压变频电源并入公共电网。
4) 准备为高压 6.6kV ( lOkV) 泊船供电， 闭合开关 S4。 准备为低压 440V船舶受电系 统供电， 闭合幵关 S5。
5 ) 同步装置检测岸基变频电源与船舶辅助发电机的同步情况， 完成同步后， 手动或自 动闭合开关 S6或 S7。 岸基变频电源被并入船舶电网。
6)岸基变频电源与船舶辅助发电机同时向船上负荷供电。 断开开关 S8、 S9, 高压船舶 辅助发电机退出系统并停机。 断开开关 S10、 Sl l;低压船舶辅助发电机退出系统并停机。
7)保护系统在岸基变频电源系统运行过程中时刻监测可能发生的故障， 如： 接地故障 或短路故障。
8 )船舶准备离港时， 船舶所有发电机启动， 同步装置检测岸基变频电源与船舶辅助发 电机的同步情况， 完成同步后， 手动或自动闭合开关 S8、 S9或 S 10、 S ll。 船舶辅助发电机 被并入船舶电网。
9)岸基变频电源与船舶发电机同吋向船上负荷供电， 断开开关 S6或 S7, 岸基变频电 源从船舶系统切除。 断开开关 S2、 S3、 S4、 S5，岸基变频电源与公共电网切除。 闭合接地开 关 Pl、 P2、 P3、 P5或 Pl、 P2、 P4、 P6, 整个系统接地。
10 ) 断开岸基变频电源与船舶受电系统之间的电力电缆及控制电缆， 船舶可以离港。 见图 2， 输出 6.61£¥/0〜601¾的港口岸基变频电源， 通过干式移相整流变压器 T与港口 高压变电站相连， 变压器 T副边由 6个不同相位组组成， 每个相位组分成 3个绕组， 采用延 边三角接法， 每组相位组分别向同一组功率单元供电， 如： 相位组 i同时向单元 Al、 单元 B 单元 C1供电。 同一相位单元依次串联， 单元 Al、 单元 A2、 单元 A3、 单元 A4、 单元 A5、 单元 A6依次串联， 单元 Bl、 单元 B2、 单元 B3、 单元 B4、 单元: B5、 单元 B6依次串 联,单元 Cl、 单元 C2、 单元 C3、 单元 C4、 单元 C5、 单元 C6依次串联。 A相、 B相、 C相 所有单元以星形方式连接， 直接输出 6.6kV线电压， 为船舶负载供电。
见图 3， 输出 10kV/0〜60HZ的港口岸基变频电源， 通过干式移相整流变压器 T与港口 高压变电站相连， 变压器 T副边由 8个不同相位组组成， 每个相位组分成 3个绕组， 采用延 边三角接法， 每组相位组分别向同一组单元供电， 如； 相位组 1同时向单元 Al、 单元 Bl、 单元 C1供电。 同一相位单元依次串联， 如： 单元 Al、 单元 A2、 单元 A3、 单元 A4、 单元 A5、 单元 A6、 单元 A7、 单元 A8依次串联。 A相、 B相、 C相所有单元以星形方式连接， 直接输出 10kV线电压， 为船舶负载供电。
见图 4， 所述变频电源的功率单元输入侧熔断器 F l、 F2实现保护功能。整流侧由二极管 D-a、 D-b、 D-c、 D-d、 D-e、 D-f组成单方向能量传递整流电路， 电容组 C构成直流滤波环 节， 电阻 R实现直流侧均压并在变频电源停机后为电容组 C提供放电通道， 间接保护设备 操作及人员安全，逆变侧可控功率开关器件 VT-a、 VT-b、 VT-c、 VT-d实现 3电平电压输出。

Claims

1、 港口岸基变频供电系统， 其特征在于， 包括变频电源、 港口高压变电站、 船舶电力 系统， 变频电源的输入端与港口高压变电站相连， 变频电源的输出端与船舶电力系统相连； 该供电系统能够连续输出电压调节范围为 0〜6.6kV或 0〜10kV、 频率调节范围为 0〜60Hz 的三相交流电。
2、 根据权利要求 1所述的港口岸基变频供电系统， 其特征在于， 所述的变频电源通过 电缆卷筒及电缆连接器与港口高压变电站相连接。
3、 根据权利要求 1或 2所述的港口岸基变频供电系统， 其特征在于， 所述的变频电源 输出侧通过电缆卷筒与配电线路连接， 高压输出直接通过配电线路给船舶电力系统配电， 低 压输出经降压变压器后为船舶电力系统配电。
4、 根据权利要求 3所述的港口岸基变频供电系统， 其特征在于， 所述的变频电源由移 相整流变压器、 多个功率单元组成， 移相整流变压器副边由多个不同相位组组成， 每个相位 组分成 3个绕组， 采用延边三角接法， 每组相位组分别向同一组功率单元供电， 同一相位功 率单元依次串联叠加组成多电平结构， A相、 B相、 C相所有串联叠加的功率单元以星形方 式连接， 输出 6.6kV或 10kV线电压， 为船舶负载供电。
5、 根据权利要求 4所述的港口岸基变频供电系统， 其特征在于， 所述的功率单元输入 侧设有起保护作用的熔断 I, 整流侧由二极管 D-a、 D- b、 D-c、 D-d, D- e、 D- f组成单方向 能量传递整流电路， 电容组 C构成直流滤波环节， 电容组 C并联有均压放电电阻 R， 逆变 侧由可控功率开关器件 VT-a、 VT-b、 VT-e、 VT-d组成 3电平电压输出。
6、 权利要求 1或 2所述港口岸基变频供电系统， 其特征在于， 该系统的工作过程是：
1 )高压 6.61cV或 10kV船舶靠岸后， 闭合接地开关 Pl、 P2、 P3和 P5; 低压 440V船舶 靠岸后， 闭合接地开关 Pl、 P2、 P4、 P6, 船侧及岸上系统接地；
2)船侧及岸上系统接地后， 连接系统所有电力电缆及控制电缆；
3 ) 保护系统监测电缆接头链接情况， 确认无误后， 断开接地开关 Pl、 P2、 P3、 P5或 Pl、 P2、 P4、 P6? 接地系统断开； 闭合开关 S3 , 高压变频电源并入公共电网；
4)准备为高压 6.6kV或 lOkV泊船供电， 闭合开关 S4;准备为低压 440V船舶受电系统 供电， 闭合幵关 S5;
5) 同步装置检测岸基变频电源与船舶辅助发电机的同步情况， 完成同步后， 手动或自 动闭合开关 S6或 S7; 岸基变频电源被并入船舶电网；
6)岸基变频电源与船舶辅助发电机同时向船上负荷供电； 断开开关 S8、 S9, 高压船舶 辅助发电机退出系统并停机； 断开开关 S10、 Sll， 低压船舶辅助发电机退出系统并停机；
7) 保护系统在岸基变频电源系统运行过程中时刻监测可能发生的故障；
8) 船舶准备离港时， 船舶所有发电机启动， 同步装置检测岸基变频电源与船舶辅助发 电机的同步情况， 完成同步后， 手动或自动闭合开关 S8、 S9或 S10、 S11 ; 船舶辅助发电机 被并入船舶电网；
9) 岸基变频电源与船舶发电机同时向船上负荷供电， 断开开关 S6或 S7， 岸基变频电 源从船舶系统切除； 断开开关 S2、 S3、 S4、 S5, 岸基变频电源与公共电网切除； 闭合接地开 关 Pl、 P2、 P3、 P5或 Pl、 P2、 P4、 P6， 整个系统接地；
10) 断开岸基变频电源与船舶受电系统之间的电力电缆及控制电缆， 船舶可以离港。
PCT/CN2012/071448 2011-03-15 2012-02-22 港口岸基变频供电系统 WO2012122873A1 (zh)

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