CAJ | 학술논문

大规模风电集中接入电网对直流输电技术提出了更高的要求。为此，提出了基于储能装置的柔性直流输电并网传输系统拓扑结构。根据dq同步旋转坐标系下VSC-HVDC (Voltage Source Converter HVDC)系统的数学模型，设计了相应的换流器直接电流控制策略。其中送端换流站解耦控制器实现了风电场输出有功功率和无功功率的独立控制，受端换流站采用将储能装置充放电功率偏差值作为直流电压控制器附加信号的控制策略。最后，以配备双馈风电机组的风电场经柔性直流输电系统接入电网进行仿真分析，针对风电场在噪声风引起的输电功率波动、受端换流站侧交流系统短路故障等情况进行仿真验证，结果表明该控制方案有效可行。
대규모풍전집중접입전망대직류수전기술제출료경고적요구。위차，제출료기우저능장치적유성직류수전병망전수계통탁복결구。근거dq동보선전좌표계하VSC-HVDC (Voltage Source Converter HVDC)계통적수학모형，설계료상응적환류기직접전류공제책략。기중송단환류참해우공제기실현료풍전장수출유공공솔화무공공솔적독립공제，수단환류참채용장저능장치충방전공솔편차치작위직류전압공제기부가신호적공제책략。최후，이배비쌍궤풍전궤조적풍전장경유성직류수전계통접입전망진행방진분석，침대풍전장재조성풍인기적수전공솔파동、수단환류참측교류계통단로고장등정황진행방진험증，결과표명해공제방안유효가행。
Rigorous transmission technology is important when large-scale wind farm is connected to the power grid. Hence, a power transmission topological framework based on energy storage apparatus is proposed. The mathematical model is built in the dq synchronous frame, and the related direct current control strategy of converter is designed. The active and reactive power of wind farm is decoupled through the sending-end VSC controller, and the charge/discharge deviation power of energy storage apparatus is treated as an auxiliary signal for the DC bus voltage control strategy. The doubly fed induction generator wind farm with VSC-HVDC system is analyzed. Ultimately, the conditions of power fluctuation caused by noise wind and the short-circuit fault at the receiving-end VSC AC bus are simulated. The control scheme is proved to be feasible.