Key design points and case study of photovoltaic,energy storage,direct current and flexibility systems for zero carbon apartments in cold zone

Driven by the “dual carbon” goal,the photovoltaic,energy storage,direct current and flexibility (PEDF) system has become a key path for the energy transformation in the building field.This article takes a zero carbon apartment as the research object and constructs a collaborative design system covering photovoltaic power generation,energy storage regulation,direct current (DC) power distribution,and flexible electricity use,forming a full process technical path for the design stage of “theoretical modeling-simulation optimization-engineering design”.Based on the simulation of building energy consumption and photovoltaic power generation,the capacity configuration of the photovoltaic-load-energy storage system is determined.At the same time,in response to the problems of multiple photovoltaic units and multiple energy storage units in this system,the control strategy of the DC bus voltage layered architecture is adopted to achieve the efficient coordination of the photovoltaic and energy storage system,solving the problems of power balance and voltage stability.The feasibility of the technology used in this article in the cold zone provides a reference for the design of similar PEDF buildings.