Method for designing stability of diesel-storage vehicle-mounted power system with load characteristics being taken into consideration

Abstract

The invention discloses a method for designing the stability of a diesel-storage vehicle-mounted power system with load characteristics being taken into consideration. The vehicle-mounted power systemcomprises a diesel generating set, a battery pack, a direct current bus and a converter device. The method is a stability design method for the vehicle-mounted power system in the coexistence of constant power load and resistive load, and the influences of the two load characteristics on the system stability are fully brought into consideration. The method comprises three flows: I, building an average circuit model of the diesel-storage vehicle-mounted power system to estimate a system stable constraint condition; II, building a power balance equation of the diesel-storage vehicle-mounted power system to estimate a system power balance condition; III, acquiring a uniform stability design basis of the system according to the stable constraint condition obtained in the step I and the powerbalance condition obtained in the step II. The method for designing the stability of a diesel-storage vehicle-mounted power system with load characteristics being taken into consideration has the advantages that the constraint relationship among load power, a voltage grade, a current protection threshold and a control parameter is disclosed, and a part selection and parameter design reference is provided for technicist in the art at the beginning of the design of the vehicle-mounted power system.

Description

technical field [0001] The invention relates to a stability analysis and evaluation method of a distributed power supply system, in particular to a stability design method of a diesel-storage vehicle-mounted power supply system considering load characteristics. Background technique [0002] As a relatively stable and reliable power generation (power supply) system, diesel generator sets (hereinafter referred to as "oil generators") are widely used in vehicle-mounted mobile power stations (automotive power stations). However, due to the small moment of inertia of the diesel engine, in order to avoid fluctuations in the system terminal voltage that may be caused by sudden loading and unloading, the energy storage device is usually used as an energy buffer and used in conjunction with the diesel engine to form a diesel storage type Vehicle power system. There have been related researches on the topology and control of the diesel-storage on-board power system. The invention pa...

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Problems solved by technology

At the same time, in a relatively long period of time in the future, constant power loads and resistive loads will exist at the same time. There is no quantitative analysis on the impact of the different proportions of the two on the stability of the vehicle power system.

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