光储直柔空调系统运行控制策略研究

Control strategy of photovoltaics and energy storage integrated flexible direct current air-conditioning system

为解决常规光储空调系统光伏利用率和储能利用率低的问题,提出一种光储直柔空调系统方案。该系统电网侧AC/DC、储能侧DC/DC、电机侧DC/AC统一在直流侧连接控制,可以简化系统连接,能够保障光伏寻优以及系统在并网和离网条件下储能充放电控制策略的实施。通过仿真建模验证该控制方案能够实现并网和离网下光储直柔空调系统的稳定运行。

In order to solve the problems of low utilization rate of photovoltaics and energy storage in conventional photovoltaics and energy storage air-conditioning system,a scheme of photovoltaics and energy storage integrated flexible direct current air-conditioning system is proposed.This system can achieve integrated connection and control of the power grid side AC/DC,the energy storage side DC/DC and the motor side DC/AC at the DC side,which can simplify the system connection,ensure the photovoltaics optimization and the implementation of control strategy for energy storage charge/discharge under the conditions of grid-connected and off-grid of system.Through simulation modeling,it is verified that this control scheme can realize the stable operation of the photovoltaics and energy storage integrated flexible direct current air-conditioning system under the conditions of grid-connected and off-grid of system.