Abstract
Integrated energy systems (IES) are an important physical carrier of the energy Internet, which undertakes the tasks of energy conversion, distribution, and storage of electricity, heat and cold. From the perspective of energy Internet, this paper studies the optimal operation scheduling of an urban power grid with a high proportion of clean energy and proposes a multi-energy coordinated intelligent management method for the urban power grid. Firstly, the structure and typical characteristics of urban energy Internet are researched. On this basis, the regulatory capacity of the adjustable generator set and the regenerative equipment is used to offset the volatility of renewable energy, the internal operating system, and network stable operation constraints are considered. To solve the model, alternating direction method of multipliers (ADMM) is used. Finally, a real-time power grid example is given to verify the effectiveness of the proposed method.
Highlights
The current energy structure is dominated by primary energy, which brings great challenges to the sustainability of the world’s energy supply, as well as huge environmental problems [1]
The network is coupled with distributed terminal integrated energy units through reasonable planning and operation optimization to realize the coordinated control of power, gas, heat and other integrated energy systems [2,3]
The development of urban integrated energy systems (IES) provide a new idea for the efficient utilization of clean energy: power supply and heating are closely combined through the “Energy Internet” [7], and the capacity of absorption and utilization of renewable energy is effectively improved through heat storage
Summary
The current energy structure is dominated by primary energy, which brings great challenges to the sustainability of the world’s energy supply, as well as huge environmental problems [1]. With the development of distributed generation technology, most scholars focus their research on IES at the regional level, but there is lack of targeted research on the multi-energy coordination and the integrated management of urban power grids in the context of large-scale clean energy applications. Based on the above background, from the perspective of energy Internet, the optimal operation scheduling of an urban power grid with high clean energy penetrance is studied. (1) To solve the scheduling and the grid connection problems of multi-type new energy, this paper presented a coordinated scheduling method for urban multi-time scale heat–electricity systems. The method ensured the robustness of the scheduling scheme through coordinating the output of controllable generators, electric boilers, storage devices, etc., as well as using multiple time scales (day-ahead, days, real-time) to gradually reduce the impact of renewable energy forecast deviation on the grid.
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