Abstract
The number of new energy power stations in China is boosting in recent years, a large number of conventional power supplies have been replaced, resulting in severe problems in controlling the frequency of power grids and easily leading to frequency issues of the state power grid. When large frequency disturbance occurs in power grid, renewable energy stations can participate in primary frequency regulation of power grid and provide support for system frequency, and the primary frequency regulation capability of the large power grid in sending end is significantly enhanced. In this study, a simulation evaluation method was proposed for the FFR controller of new energy power stations based on the RT-LAB real-time simulation analysis platform. The FFR controller was connected to in the simulation model of the state power grid via I/O physical interfaces and MODBUS communication, so as to conduct the step disturbance test, anti-disturbance performance verification test and automatic generation control (AGC) coordination test and hardware-in-the-loop simulation test of the controller. Results of the tests proved that the test method proposed in this study is accurate and reliable, and help improve the performance of a new energy power station in the state power grid.
Highlights
To cope with the shortage of fossil energy and in the face of the environmental pollution it brings about, power generation using renewable energies, represented by wind power generation and photovoltaic power generation, has been attracting wide attention for its low carbon consumption, environmental-friendliness, proven technology and capability of large-scale production [1]
The number of new energy power stations in China is boosting in recent years, but as new energy power generation requires a huge number of electronic power transform devices and connection to the state power grid and a large number of conventional power supplies have been replaced, the new energy power generation system is of a low inertia level
Results of the tests proved that the test method proposed in this study is accurate and reliable, and could test and verify the performance of a new energy power unit connected to the state power grid, provide experimental data for optimizing the operation strategy of such a unit and help improve the performance of a new energy power station in the state power grid
Summary
To cope with the shortage of fossil energy and in the face of the environmental pollution it brings about, power generation using renewable energies, represented by wind power generation and photovoltaic power generation, has been attracting wide attention for its low carbon consumption, environmental-friendliness, proven technology and capability of large-scale production [1]. Given the low-frequency response of new energy power stations and great stress and high cost to regulate the frequency and peak of conventional power units, primary frequency regulation capacity of new energy power stations is the development trend of the new energy power generation technology. It has been expressly stated in GB 38755-2019 Code on Security and Stability for Power System, implemented on July 1, 2021, that "wind power stations and photovoltaic generation. Results of the tests proved that the test method proposed in this study is accurate and reliable, and could test and verify the performance of a new energy power unit connected to the state power grid, provide experimental data for optimizing the operation strategy of such a unit and help improve the performance of a new energy power station in the state power grid
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