Off-grid state energy balance simulation method for distributed comprehensive energy system
An integrated energy system and energy balance technology, applied in the field of energy balance simulation in the off-grid state of distributed integrated energy systems, can solve the problem of less consideration of the influence of heat load changes on the system frequency, reducing the effectiveness of energy balance simulation, and not fully considering the impact To achieve the effect of improving the consumption of renewable energy, improving the accuracy and reliability of simulation, and improving the efficiency of energy utilization
Active Publication Date: 2019-08-30
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Adopting multi-energy complementary coupling comprehensive simulation is an important means to realize the real-time state acquisition of energy balance. At present, simulation models of multi-energy systems such as electricity / heat / cold can be established through simulation software such as MATLAB\PSCAD, and corresponding frequency adjustment and The secondary regulation model is to design corresponding regulators for frequency-regulated gas turbines and energy storage devices. However, in terms of comprehensive simulation, especially the distributed interconnection structure of multiple comprehensive energy systems, on the one hand, less consideration is given to the impact of thermal load changes on the system. The influence of frequency, while the constant frequency modulation model is usually used for energy storage devices, and the influence of its state of charge on the control model has not been fully considered
These factors distort the simulation results and reduce the effectiveness of the energy balance simulation in the off-grid state of the distributed integrated energy system
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[0038]The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0039] 1. The typical structure of distributed integrated energy system is as follows: figure 1 As shown, the integrated energy system 1 is set to include units such as gas turbines, lighting loads, photovoltaics, and air supply heat loads, and can be connected to the AC system 1 for grid-connected operation through the grid-connected switch 1; the integrated energy system 2 includes energy storage devices, wind power, Units such as hot water load and power load can run in parallel with the AC system 2 through the grid-connected switch 2; the integrated energy system 1 and the integrated energy system 2 are interconnected through the contact switch.
[0040] 2. Carry out simulation modeling of integrated energy system 1 and integrated energy system 2, including establishing models of various power sources and loads in the distributed integrated energy ...
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The invention relates to an off-grid state energy balance simulation method for a distributed comprehensive energy system. The off-grid state energy balance simulation method comprises the following steps: performing simulation modeling on a comprehensive energy system 1 and a comprehensive energy system 2, and outputting a physical model of each equipment; establishing a comprehensive frequency modulation simulation model of a gas turbine of the comprehensive energy system 1 and an energy storage device of the comprehensive energy system 2; starting off-grid operation simulation of the distributed comprehensive energy system; and in the off-grid operation simulation process, automatically adjusting the comprehensive frequency modulation simulation model of the energy storage device according to SOC (state of charge) data of the energy storage device so as to keep energy balance of the distributed comprehensive energy system in the off-grid state. According to the off-grid state energybalance simulation method, the simulation credibility is improved, and technical support is provided for improving the operation reliability and the comprehensive energy efficiency of the distributedcomprehensive energy system.
Description
technical field [0001] The invention relates to an energy balance simulation method in an off-grid state of a distributed comprehensive energy system, belonging to the technical field of distributed energy supply. Background technique [0002] my country has listed "distributed energy supply technology" as a key frontier technology in the field of advanced energy technology in the "National Medium and Long-term Science and Technology Development Outline (2006-2020)". Up to now, my country has launched a number of scientific and technological research and development projects related to distributed integrated energy through the 973 and 863 plans. Multi-energy complementary integrated optimized distributed energy systems can fully meet the diverse energy needs of users in different regions, innovate energy supply models, and realize power / heating / cooling among multi-energy systems and between different links of source-network-load-storage. efficient use of collaboration. [...
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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 邓卫裴玮肖浩马文祥孔力
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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