Description: 在MATLAB/Simulink环境中搭建了光伏发电系统模型,其采用最大功率点跟踪(MPPT)控制算法,并加入继电保护逻辑控制模块.通过PSASP的用户程序接口,可将该模型以电流源的形式接入电网模型进行暂态稳定计算.同时提出在电流源并网模式下并网光伏发电系统控制其与电网的无功功率交换为0,因此在潮流计算中可将光伏电站设为PQ节点,并设无功功率为0.CEPRI 36节点系统的仿真结果验证了该模型的正确性,并表明所提模型比常规同步电机二阶经典模型对电网故障的反应更为灵敏,但其对于改善全系统的暂态稳定性作用不大.-Built in MATLAB/Simulink environment, the photovoltaic power generation system model, which uses maximum power point tracking (MPPT) control algorithm and adding relay logic control module via the user program interface PSASP of the model can be in the form of a current source connected to the grid computing model for transient stability, while raised in the current source and network mode and grid-connected PV systems control the reactive power exchange with the grid is zero, so the flow calculation of photovoltaic power plants can be set to PQ node, reactive power and set the simulation results 0.CEPRI 36 node system to verify the correctness of the model and show that the proposed model is more sensitive than conventional synchronous motor response of the second-order classical model of grid failure, but the whole to improve transient stability is not the role of the system. Platform: |
Size: 1011712 |
Author:李雷 |
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Description: Grid-connected distributed generation sources interfaced
with voltage source inverters (VSIs) need to be disconnected
the grid under: 1) excessive dc-link voltage 2) excessive ac
currents and 3) loss of grid-voltage synchronization. In this paper,
the control of single- and two-stage grid-connected VSIs in photovoltaic
(PV) power plants is developed to address the issue of
inverter disconnecting under various grid faults. Inverter control
incorporates reactive power support in the case of voltage sags
based on the grid codes’ (GCs) requirements to ride-through the
faults and support the grid voltages. A case study of a 1-MW
system simulated in MATLAB/Simulink software is used to illustrate
the proposed control. Problems that may occur during grid
faults along with associated remedies are discussed. The results
presented illustrate the capability of the system to ride-through
different types of grid faults.-Grid-connected distributed generation sources interfaced
with voltage source inverters (VSIs) need to be disconnected
the grid under: 1) excessive dc-link voltage 2) excessive ac
currents and 3) loss of grid-voltage synchronization. In this paper,
the control of single- and two-stage grid-connected VSIs in photovoltaic
(PV) power plants is developed to address the issue of
inverter disconnecting under various grid faults. Inverter control
incorporates reactive power support in the case of voltage sags
based on the grid codes’ (GCs) requirements to ride-through the
faults and support the grid voltages. A case study of a 1-MW
system simulated in MATLAB/Simulink software is used to illustrate
the proposed control. Problems that may occur during grid
faults along with associated remedies are discussed. The results
presented illustrate the capability of the system to ride-through
different types of grid faults. Platform: |
Size: 38912 |
Author:hari |
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Description: The objective is to present a nonlinear approach to design a suitable controller system for the photovoltaic (PV) single-phase grid-connected system. The system structure includes a PV generator, Boost converter, and DC-AC inverter coupled to grid network. A backstepping controller is developed to extract maximum point power tracking (MPPT), to regulate the DC bus voltage, and to generate a sinusoidal current into the grid in phase with grid voltage in order to achieve unity power factor. The stability of the control algorithm is demonstrated by tools of Lyapunov analysis. Simulations show that the proposed controller system completely accomplishes listed aims even under atmospheric conditions variation. Theperformance of the proposed controller has been validated by numerical simulation in MATLAB SIMULINK(The objective is to present a nonlinear approach to design a suitable controller system for the photovoltaic (PV) single-phase grid-connected system. The system structure includes a PV generator, Boost converter, and DC-AC inverter coupled to grid network. A backstepping controller is developed to extract maximum point power tracking (MPPT), to regulate the DC bus voltage, and to generate a sinusoidal current into the grid in phase with grid voltage in order to achieve unity power factor. The stability of the control algorithm is demonstrated by tools of Lyapunov analysis. Simulations show that the proposed controller system completely accomplishes listed aims even under atmospheric conditions variation. Theperformance of the proposed controller has been validated by numerical simulation in MATLAB SIMULINK) Platform: |
Size: 507904 |
Author:zinouzinou |
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Search - grid connected photovoltaic system with matlab