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The MPSS (multiport power supply system) is consist of fuel cell, super capacitor and two DC/DC converters. The energy management scheme, along with the allocation principle of energy storage unit is analyzed. The paper establishes the mathematical model and proposes a composite control strategy. The strategy fuses subsection PI (Proportional and Integral) control and SMC (Sliding Mode Control) based...
The future custom power park will realize the hierarchical power supply of different voltage quality grade, meanwhile and present the grid-friendly characteristics including low pollution for grid, organic combination with distributed generation (DG) and energy storage (ES). In order to gradually achieve the goals, the function reuse and integration in the equipment level should be solved firstly...
Functions of UPQC (Unified Power Quality Conditioner) converters are relatively independent under traditional UPQC control. Its series converter usually is in standby state without full use while its parallel converter usually is in heavy load state. In this paper, a novel UPQC coordinated control strategy is proposed which uses series converter to share reactive power compensation function of parallel...
With the high penetration of distributed generations (DGs) have been connected into the local power distribution network, it will result in some deteriorative influences such as poor power quality and stability issues. And power distribution network itself with problems of power system nonlinear characteristic, power system faults and nonlinear loads makes this issue more severe. Meanwhile, in order...
Because the method for identifying a first-order inertia system parameter in time domain isn't applicable for the approximate first - order inertia nonlinear system with timevarying inertia parameter, and the control effect based on the method is also not so good. Therefore, a method of moving-average-based discrete identification in time domain is proposed in this paper. By simulation test, it is...
The combination of the grid and DG is considered as a main method which can save investment, reduce fossil energy consumption and improve the reliability and flexibility of the power system. However, the high penetration of DG will severely influence the distribution network. This paper studies a typical structure of distribution network, analyzes the principal theory and sets up the simulation model...
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