Method for quickly analyzing voltage stability of direct-current bus of pure battery power ship system
A technology for rapid analysis of DC bus voltage, applied in parallel operation of DC power supplies, DC network circuit devices, electrical components, etc., can solve problems such as instability, and achieve the effect of clear mechanism, easy promotion and fast analysis speed
Active Publication Date: 2021-08-13
湖北东湖实验室
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Problems solved by technology
If the DC / DC converter's stable control of the DC bus voltage cannot suppress the negative damping introduced by the power source operating characteristics of the propulsion load, the DC bus voltage will be at risk of instability, which will bring a negative impact on the safe and stable operation of the integrated power system of pure battery powered ships. to challenge
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[0057] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below may be combined with each other as long as they do not constitute a conflict with each other.
[0058] figure 1 Shown is the application scenario of the present invention: the integrated power system of a pure battery powered ship.
[0059] figure 2 Shown is a schematic diagram of a typical control scheme for a battery-connected DC / DC converter. Double-loop control is adopted, the outer loop voltage control is used to maintain a constant DC bus voltage, and ...
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The invention discloses a method for quickly analyzing the voltage stability of a direct-current bus of a pure battery power ship system. The method comprises the steps: researching negative damping characteristics dynamically introduced to the voltage of the direct-current bus by a propulsion load consisting of a propulsion frequency converter and a propulsion motor; the positive damping characteristic dynamically introduced to the voltage of the direct-current busby the battery connected to the DC / DC converter is studied; and rapid analysis of the voltage stability of the direct-current bus is realized from the angle of whether the total damping component is positive or not. The invention provides a model, thought and method for the analysis of the voltage stability of the DC bus of the pure battery power ship integrated power system, and has the advantages of simple and quick analysis, clear mechanism, convenience in direct engineering application and the like.
Description
technical field [0001] The invention relates to the technical field of safe operation of a microgrid, in particular to a method for quickly analyzing the voltage stability of a DC bus of a pure battery powered ship system. Background technique [0002] In order to increase the energy saving and emission reduction of ships and promote the development of green shipping, new energy ships using "oil to electricity" have become the development trend of new ships. The pure battery power integrated power system is a typical power system architecture of new energy ships. Its characteristics are: using batteries to replace traditional diesel engines, combining the independent mechanical propulsion system and power system in traditional ships into one, and unifying them in the form of electric energy. Electric propulsion and power supply for daily equipment, etc. [0003] In the pure battery power integrated power system, the battery is used as the power source of the system, which g...
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IPC IPC(8): H02J1/00H02J1/10
CPCH02J1/00H02J1/106H02J2310/42
Inventor 胡祺马伟明马凡付立军张彦纪锋梅丹熊又星
Owner 湖北东湖实验室