基于华中电网跨区电力交易的市场辅助服务研究

随着中国风电、水电等清洁能源的大规模开发利用及特高压工程建设的高速发展,跨区电力交易日益频繁且交易量逐年增长。大规模区外来电增加了受端电网的调峰、备用等压力,然而目前不参与受端电网辅助服务的考核和补偿体系。针对这一情况,介绍了华中电网电源及负荷特点,分析了跨区电力交易的现状;提出了跨区电力交易参与华中电网调峰和备用辅助服务的机制建议;根据所提机制,测算了天中等直流跨区联络线送电应分担华中电网调峰和备用辅助服务的大小。所提模型有利于建立跨省区辅助服务分担共享机制,进而缓解华中地区火电机组调峰压力,促进西北等地的清洁能源送往华中电网消纳。

Research on Ancillary Services Market Based on Inter-Regional Electricity Transactions in Central China Power Grid

With the large-scale development of such clean energies as wind power and hydropower in China and the rapid construction of UHV projects, the inter-provincial electricity transactions are becoming more frequent with transaction volume increasing year by year. Large-scale out-of-area electricity increases the pressure for the receiving-end power grid to shave peak and reserve power, but it is not involved in the current assessment and compensation system of the ancillary market. Firstly, the power source and load characteristics of the central China power grid (CCPG) are introduced in this paper, and then the status quo of its inter-regional power transaction is analyzed. Secondly, a mechanism is proposed for the inter-regional power transaction to participate in CCPG peak shaving and reserve ancillary service. Finally, according to the proposed mechanism, the influences of the high-voltage DC transmission lines on the peak shaving and reserve ancillary service in CCPG are computed. The model proposed in this paper is conducive to the establishment of sharing mechanism of inter-regional ancillary services, subsequently alleviating the peak shaving pressure of the thermal power units in CCPG and promoting the consumption of clean energy transmitted from the northwest and other areas to CCPG.