Abstract
Simulation of Wind Power Integration with Modular Multilevel Converter-Based High Voltage Direct Current
Highlights
In 2021, the Chinese government released its latest work report on the back-to-back meetings of the country’s top two political bodies, making the pledge to set a peak for carbon emissions and pursue carbon neutrality
Note: PW and Qw are the active and passive powers transmitted from the wind farm to the direct current (DC) system, respectively; PS and QS are the active and passive powers exchanged between the wind farm and the DC system, respectively; i1 and i2 are the alternating current (AC) currents of wind farm-side MMC (WFMMC) and grid-side MMC (GSMMC), respectively; UWF is the outlet voltage vector of the wind farm; T2 and T3 are the converter transformers of WFMMC and GSMMC, respectively
The above waveforms indicate that the modular multilevel converter (MMC)-high voltage direct current (HVDC) can effectively transmit the active power outputted by the wind farm to the AC system, which verifies the correctness of the simulation model for the MMC-based wind power integration
Summary
In 2021, the Chinese government released its latest work report on the back-to-back meetings of the country’s top two political bodies, making the pledge to set a peak for carbon emissions and pursue carbon neutrality. China plans to increase its total installed capacity of wind power to 540 million kW by 2025. The 14th Five-Year Plan issued by the Global Energy Internet Development Cooperation Organization in 2020 points out that the installed capacity of wind power is 1.967 billion kilowatts, and the power generation is 4.36 trillion kilowatts, accounting for 30.5% of the total power generation, making it the largest energy source in my country [1]. High voltage direct current (HVDC) becomes the preferred technology [2]. The MMC-HVDC system has good wind power grid-connection capability and strong antiinterference ability. This paper attempts to solve the key problem of large scale wind power integration via MMC-HVDC system. The AC voltage and frequency control was selected for the wind farm-side MMC (WFMMC). The authors discussed the AC/DC fault ride-through (FRT), a prominent issue in largescale wind power integration via flexible DC system
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