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Abstract
With the development of demand response technology, it is possible to reduce power shortages caused by loads participating in power grid dispatching. Based on the equivalent thermal parameter model, and taking full account of the virtual energy storage characteristics presented during electro-thermal conversion, a virtual energy storage model suitable for electric heating loads with different electrical and thermal parameters is proposed in this paper. To avoid communication congestion and simplify calculations, the model is processed by discretization and linearization. To simplify the model, a control strategy for electric heating load, based on the virtual state ofcharge priority list, is proposed. This paper simulates and analyzes a control example, explores the relevant theoretical basis affecting the control effect, and puts forward an optimization scheme for the control strategy. The simulation example proved that the proposed method in this paper can reduce power storage in the grid over a long period of time and can realize a power response in the grid.
Highlights
When a power shortage occurs in the generation side of the power system, the system frequency will be reduced, resulting in a series of power quality problems
The process of temperature change is slow and the time for equipment to participate in demand response is relatively short, so it can be considered that the external temperature is constant
T j ≥ ∆t off where Pt s represents the power shortage at time t; Q represents the set arranged from large to small according to virtual state of charge (VSOC); jn is an element of set Q, and n represents the order of j in the new set
Summary
When a power shortage occurs in the generation side of the power system, the system frequency will be reduced, resulting in a series of power quality problems. Reference [10] proposed a new temperature-adjusting method on the basis of the ETP model, to avoid load oscillations caused by the traditional temperature regulation method, but the parameters of the devices participating in the demand side response needed to be the same. A load model and a trunked dispatching strategy for electric heating loads are analyzed deeply to solve the problem of electric heating loads with different parameters and demands participating in demand response at the same time. Based on a simplified first-order ETP model, a VES model, which can reflect the electro-thermal exchange, is proposed where the potential of demand response can be fully exploited Based on this model, the trunked dispatching strategy based on virtual state of charge (VSOC) priority list, is proposed. The validity and advancement of the optimized control strategy based on the VSOC priority list are proved by design and simulation examples
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