特高压直流主送新能源技术经济研究

The Technical and Economic Analysis on New Energy Mainly Transmitted by UHV DC Channels

中国西部北部清洁能源基地通过特高压直流通道实现多能互补联合外送,特别是主送或全送新能源对于支撑可再生能源科学发展和高效消纳具有重要的价值和作用。结合特高压直流功率运行控制方式,提出了特高压直流主送新能源的设想,构建了包含配套电源和输电通道特性在内的数学模型。在合理设定兼顾送端新能源出力特性和受端负荷特性的输电曲线基础上,以典型工程为例分析了主送新能源模式下的配套电源优选原则和具体方案,提出了实现特高压直流主送或全送新能源的相关建议。结果表明:以火电补充满足直流通道最小运行功率需求,高比例主送风电、光电等新能源电量是技术经济可行的。

By UHV DC transmission channels, renewable energy in western and northern China delivered in hybrid mode with different type power sources complement, especially in main or whole new energy sending modes, would play an important role in supporting national renewable energy scientific development and efficient consumption. Combined with UHV DC power running control mode, a mathematical model including supporting power and transmission channel characteristic is created. A tentative plan to transmit renewable energy as main senderby UHV DC Channels is proposed. Based on new energy output characteristic in sending region and load features in receiving region features, the transmission characteristic curve is calculated. Technical and economic analysis is performed based on practical engineering project. The results show that by usingthermal power to meet minimum operating power requirements of UHV DC, transmissionof wind and solar power in high proportion in UHV DC channel is both economically and technical feasible.