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A New Generalized Integrated Load Model and Its Equivalent Description Based on a Variety of New Energy Loads

机译：基于多种新能源负荷的新型广义综合负荷模型及其等效描述

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With the addition of new distributed energy sources, a new and more accurate load model need to be established. Based on MATLAB/Simulink, this paper researches on the modeling and simulating of photovoltaic power generation system and battery energy storage and their equivalent model. First, a detailed model of the photovoltaic system is built. Boost circuit and MPPT control are selected on the DC side of photovoltaic power generation system. The double closed loop control method of current internal loop and external voltage loop is used for grid inverter control. The model is improved considering the capability of LVRT (low voltage ride through). Based on the above precise models, the model is equaled. The equivalent transfer function is calculated by the grid connected control loop, so the model is simplified. The battery energy storage module establishes a general mathematical model based on the charging and discharging principle. Charge and discharge are controlled through the DC/DC converter. And it is connected to the power grid after inverting and filtering. The common PQ control are selected in the inverter control mode. According to the same principle, the energy storage model is equaled. Finally, based on the traditional load model, the above load model is added to set up a new generalized integrated load model. And the actual model is replaced to build up an equivalent model. The equivalent model is compared with the actual model to verify the equivalent description ability.
机译：随着新的分布式能源的加入，需要建立一个新的，更准确的负荷模型。本文基于MATLAB / Simulink，研究了光伏发电系统与电池储能及其等效模型的建模与仿真。首先，建立光伏系统的详细模型。在光伏发电系统的直流侧选择升压电路和MPPT控制。电流内部回路和外部电压回路的双闭环控制方法用于电网逆变器控制。考虑到LVRT（低压穿越）的能力，对模型进行了改进。基于以上精确模型，模型相等。等效传递函数由并网的控制回路计算得出，因此简化了模型。电池能量存储模块基于充电和放电原理建立通用数学模型。充电和放电通过DC / DC转换器控制。经过逆变和滤波后连接到电网。在变频器控制模式下选择通用PQ控制。根据相同的原理，能量存储模型相等。最后，在传统负荷模型的基础上，增加了上述负荷模型，建立了新的广义综合负荷模型。并替换实际模型以建立等效模型。将等效模型与实际模型进行比较，以验证等效描述能力。

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