Titlebook: Analysis and Mitigation of Broadband Oscillation in Renewable Energy Generation and AC/DC Transmissi; Weisheng Wang,Guanghui Li,Guoqing He

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7. Sources of Noise and Spurs in DDS,he impedance characteristics of MMC-HVDC are different in the two operating modes. Besides, since the DC transmission lines of MMC-HVDC exhibit non-ideal voltage source characteristics, the converter control loops and AC grid strength at the receiving side also influence the impedance characteristic

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7. Sources of Noise and Spurs in DDS,By the end of 2021, the cumulative world capacity of the installed wind power and photovoltaic (PV) generation amounted to 849?GW and 825?GW. In China, renewable energy generation (REG) has been developing rapidly in the past two decades.

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4. Direct Digital Synthesizers,Power electronic devices are widely used in renewable energy generation and AC/DC transmission systems. From system modeling and analysis point of view, these are nonlinear systems due to the switching process and active control of grid-connected converters.

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4. Direct Digital Synthesizers,The mathematical model of two-level converter includes several non-linear parts such as insulated-gate bipolar transistor (IGBT) switching in the main circuit, and pulse width modulation (PWM), Park transformation, and PLL in the control loops.

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11. Pulse Shaping and Interpolation Filters,PV array is the power supply of PV unit. The changes in irradiance and temperature will affect the output voltage and current of PV array. As DC bus provides a coupling path between PV array and the inverter, operating conditions have a significant impact on the broadband impedance characteristics of PV unit.

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Digital System Test and Testable DesignREG plants usually include dozens to thousands of units, as well as overhead transmission lines or cables, unit box transformers.

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Standard IEEE Test Access Methods,At the sending side of HVAC transmission, thousands of REG units are integrated into AC grid through multiple step-up transformers. Besides, series capacitive compensators are widely used in HVAC to improve the transmission capacity and enhance the system stability.

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Introduction,By the end of 2021, the cumulative world capacity of the installed wind power and photovoltaic (PV) generation amounted to 849?GW and 825?GW. In China, renewable energy generation (REG) has been developing rapidly in the past two decades.