研究目的
To study the dynamic interactions between PV systems and the LV distribution network within a reasonable simulation time by deriving a linear state-space model of a two-stage PV system operating at maximum power point (MPP) with reactive power support capability.
研究成果
The developed linear state space model was validated against a detailed switching model in MATLAB/ Simscape Power Systems? and accurately captures all system dynamics for the small deviations expected in grid support operation. The results show equivalent system dynamics between the switching and linearized state-space model. The linearized state-space model produces equivalent system dynamics with a computational burden reduction of 2200:1.
研究不足
The accuracy of the linearized network model depends upon the linearization points chosen. A steady state error in voltage carries through to the Q(V) controller producing a steady state error. Future work will address a more comprehensive analysis on voltage stability using this presented state-space model.
1：Experimental Design and Method Selection:
The paper derives a linear state-space model of a two-stage PV system for voltage support simulation. The development of the linear PV system model facilitates fast simulation of the dynamic interactions between large numbers of PV systems and the distribution network.
2：Sample Selection and Data Sources:
The PV system under study uses a two-stage conversion. The first stage uses a step up DC/DC converter that implements a maximum power point tracker (MPPT) to regulate the maximum PV array power available during varying irradiation and temperature conditions.
3：List of Experimental Equipment and Materials:
The paper mentions the use of MATLAB/ Simscape Power Systems? for validation. The PV array parameters for the Hyundai IMG 250Wp multi-crystalline panel are obtained from NREL System Advisor Model (SAM).
4：Experimental Procedures and Operational Workflow:
The linearized state-space PV system is validated by comparing its results with those of the switching PV system using MATLAB/ Simscape Power Systems?. A distribution network model in the dq0 reference frame is also derived and compared against a detailed switching model.
5：Data Analysis Methods:
The paper compares the dynamic performance of both systems for various irradiance events with the implementation of an autonomous voltage support controller.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容
