Abstract
This paper discusses a structural property for a power system to continue a safe operation under power fluctuation caused by fluctuating power sources and loads. Concerns over global climate change and gas emissions have motivated development and integration of renewable energy sources such as wind and solar to fulfill power demand. The energy generated from these sources exhibits fluctuations and uncertainty which is uncontrollable. In addition, the power fluctuations caused by power loads also have the same consequences on power system. To mitigate the effects of uncontrollable power fluctuations, a power flow control is presented which allocates power levels for controllable power sources and loads and connections between power devices. One basic function for the power flow control is to balance the generated power with the power demand. However, due to the structural limitations, i.e., the power level limitations of controllable sources and loads and the limitation of power flow channels, the power balance may not be achieved. This paper proposes two theorems about the structural conditions for a power system to have a feasible solution which achieves the power balance between power sources and power loads. The discussions in this paper will provide a solid theoretical background for designing a power flow system which proves robustness against fluctuations caused by fluctuating power devices.
Highlights
The awareness of depletion of fossil fuels, increase of power demand, and global warming have promoted the development of renewable energy sources
The power fluctuations caused by power loads have the same consequences on power system
From such point of view, in which power supply and demand changes dynamically, a power flow control mechanism is introduced which assigns power levels for controllable power devices and connections between power devices to absorb the power fluctuations caused by fluctuating devices
Summary
The awareness of depletion of fossil fuels, increase of power demand, and global warming have promoted the development of renewable energy sources. The system design guidelines and system robustness in the presence of of both papers is to enhance demand side flexibility by efficiently using distributed multi-energy uncertainty caused by fluctuating power devices in real time is not considered which is the main focus generation system. The system design guidelines and system robustness in the presence of other hand, there are many software packages which can simulate the behavior of a power system, uncertainty caused by fluctuating power devices in real time is not considered which is the main focus find solutions of constrained optimization problems, etc Most of these approaches are based of our study. Numerical results with illustrative examples of considered system for the application of proposed theorems have been explained in Section 6, Section 7 gives concluding remarks
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