Generalized steady-state model for energy router with applications in power flow calculation

Energy router is an emerging device based on power electronic technology, which can realize the flexible distribution of electric energy in the power system. Therefore, the use of energy routers to improve the operating conditions of the power system not only has broad development prospects, but also brings economic benefits. In this regard, this paper proposes a steady-state model of a single energy router and considers the loss of the DC/DC transformer, establishes a power flow equation with multiple energy routers, and proposes a distribution network power flow alternate iteration that takes into account multiple energy routers Calculation method. A case study of an improved IEEE-33 system with multiple energy routers under different working conditions is carried out. The calculation results show that the alternate iterative power flow calculation method used in this paper is effective and feasible, and it reasonably reflects that the network analysis model with multiple energy routers can achieve stable operation, and it can improve the node voltage and reduce the active power loss of the grid. It makes the operation of the distribution network more flexible.

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“…Pdyn is determined by the power provided by both sides of DC/DC transformer, and can be estimated by the following equation [18]:…”

Section: B Dc/dc Converter Modelmentioning

confidence: 99%

Power Flow Calculation of Distribution Network With Multiple Energy Routers

et al. 2021

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“…The electrical energy router can achieve flexible control of network currents like a router in the information Internet and realize functions such as tidal current distribution, voltage improvement, network monitoring, and fault isolation through flexible control means [7]. At present, many researchers are mainly oriented towards the topology of the electrical energy router [8], and there is less research on the mathematical model of the power router and the tide calculation model and voltage optimization method of the distribution network after joining the power router [9].…”

Section: Introductionmentioning

confidence: 99%

Optimization study of overvoltage problem in PV distribution network based on electrical energy router

Li,

Yang,

Yang

2023

J. Phys.: Conf. Ser.

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Photovoltaic power generation has the advantages of being clean and efficient, but it poses a threat to the voltage quality of distribution networks due to unstable power output. In order to solve the overvoltage and power utilization problems of a high-penetration PV distribution network, this paper proposes a tidal current analysis model based on a four-port power router. First, the steady-state modeling of different ports of the electrical energy router is carried out, and the corresponding voltage control strategy is proposed. Then, by establishing a unified tidal current calculation model, a solution for the optimal operation of the distribution network is proposed. Finally, based on the overvoltage data of a regional power grid, the impact on the voltage level of the grid-connected PV system before and after the addition of the power router is compared. From the analyzed data, it is concluded that the introduction of a four-port power router for corresponding port control strategies can effectively improve overvoltage problems in high-permeability PV distribution networks.

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