JP-7856633-B2 - Energy storage systems

Inventors

• ディルク・バルゲンデ
• イェルク・グラベル
• サッシャ・コルテマイアー

Assignees

• エス・ケイ・エフ マリーン ゲゼルシャフト ミット ベシュレンクテル ハフツング

Dates

Publication Date

20260511

Application Date

20210913

Priority Date

20200914

Claims (6)

1. An energy storage system (100) for at least one electrical consuming device (106) in the electrical system (142) of a ship (108), wherein the energy storage system (100) includes at least one converter (140) connected to the electrical system (142) for supplying power to the consuming device (106), and the energy storage device (160) is associated with the at least one converter (140), wherein the at least one consuming device (106) is a stabilization device (120) of the ship (108) or a steering system (128) that affects the course of the ship (108) , The energy storage device (160) is connected to the DC intermediate circuit (148) of the converter (140) via a connection line (164). An energy storage system (100) characterized in that, when at least one consumer device (106) generates a high peak load, the energy storage device (160) feeds back electrical energy to the DC intermediate circuit (148) via the connection line (164) .
2. The energy storage system (100) according to claim 1, characterized in that the energy storage device (160) includes at least one energy converter (162) and at least one storage unit (170) associated with the at least one energy converter (162).
3. The energy storage system (100) according to claim 2 , characterized in that the energy converter (162) is configured to enable bidirectional energy flow.
4. The energy storage system (100) according to any one of claims 2 to 3 , characterized in that the at least one storage unit (170) is formed of at least one large-capacity capacitor (172).
5. The energy storage system (100) according to any one of claims 2 to 3 , characterized in that the at least one storage unit (170) is formed of at least one centrifugal mass system, in particular a flywheel (174).
6. The energy storage system (100) according to any one of claims 1 to 5 , characterized in that the vessel (108) is a ship (110).

Description

This invention relates to an energy storage system for at least one electrical consuming device in the electrical system of a ship, wherein the energy storage system includes at least one converter connected to the electrical system for supplying energy to the consuming device. Prior art has shown that fin stabilizers and steering gears for passenger ships, large yachts, and floating pontoons are known in a wide variety of forms. Fin stabilizers and steering gears function periodically, and temporary high peak loads occur because rapid movement is often followed by a phase of rest or waiting with minimal energy intake. Often, due to the high peak loads, the powertrains of the fin stabilizers, steering gears, and the electrical systems supplying them need to be over-engineered. Fin stabilizers and steering gears typically operate electrohydraulic. In electrohydraulic powertrains, energy storage is only possible when a hydrostatic transmission is used as a so-called open hydraulic circuit with nitrogen storage support. The main drawback of this storage technique is the relatively low efficiency of the open hydraulic circuit, as excess energy is dissipated as heat in the form of resistance control. In comparison, closed hydraulic circuits, whether in speed control or displacement control systems, are more efficient, but by their very nature, they cannot store pressure. A drillship supply system is known from Patent Document 1. Further technical background is disclosed in Patent Documents 2, 3, 4, and 5. US2017/298721WO2007/124968A1CN110 304 228AUS2012/028516A1US2007/077830A1 This shows a schematic block circuit image of the energy storage system of the present invention for use in ships. Figure 1 shows a schematic block diagram of the energy storage system of the present invention for ships such as vessels. The energy storage system 100 functions to supply (large) consuming equipment 106 that causes high electrical peak loads on a vessel 108, such as ship 110. The electrical consuming equipment 106 is embodied here, simply as an example, as a stabilization device 120 having at least one associated electric drive unit 122 (indicated by black double arrows) for the rotational drive (indicated by black double arrows) of stabilization fins 126 for stabilizing ship 110, about one spatial axis not further shown. Furthermore, the electrical consuming equipment 106 can also be configured as a steering system 128 having at least one steering gear 130 for driving at least one associated rudder 132 to influence the course of ship 110. The energy storage system 100 includes, among other things, a converter 140 supplied from the ship's electrical system 142. The electrical system 142 is preferably a three-phase power system having a neutral wire and a protective conductor or earth. Here, the converter 140 is configured, as a mere example, as a classic conductor having a passive diode bridge 146 for rectifying the three-phase current 144 supplied by the electrical system 142, a DC intermediate circuit 148 for stabilization, and an output inverter 152. The output inverter 152 can be realized by multiple circuit breakers, and here only one circuit breaker 150 is shown, representing all the other circuit breakers. The output inverter 152 is operational. Circuit breakers are, for example, power bipolar transistors, power MOSFETs, IGBTs, thyristors, triacs, etc. Through the supply line 154, the converter 140 supplies the electrical energy necessary for operation to the (large) power-consuming equipment 106. The detailed technical circuit structure of the converter is well known to those skilled in the art working in the field of electrical energy technology; therefore, for the sake of brevity, a detailed explanation can be omitted here. Instead of the three-phase current 144, the electrical system 142 may also provide DC, and instead of the (frequency) converter 140, a voltage converter or so-called DC-DC converter (not shown) may be required. The energy storage system 100 further comprises an energy storage device 160, which includes an energy converter 162 electrically connected to a converter 140 by a connecting line 164. Furthermore, the energy storage device 160 includes at least one associated storage unit 170 for storing different forms of energy, such as electrical energy, kinetic energy, chemical energy, or potential energy. Preferably, the energy storage device 160 is intended for low-loss storage of electrical energy. The storage unit 170, not shown in more detail, can be, for example, multiple high-capacity (single) capacitors interconnected with the capacitor battery. Of the individual capacitors in the capacitor battery, only one capacitor representing all the other capacitors is shown by reference numeral 172. To enable lossless energy recovery from the energy stored in the storage unit 170 to the DC intermediate circuit 148 of the converter 140, the energy converter 162 is configured to realize bidirectional ener