Study on the combined operation of a hydro-thermal-wind hybrid power system based on hydro-wind power compensating principles
Study on the combined operation of a hydro-thermal-wind hybrid power system based on hydro-wind power compensating principles
复制标题
基于水风电补偿原理的水火风混合发电系统联合运行研究
DOI：
10.1016/j.enconman.2019.04.040
复制
发表时间：
2019
影响因子：
10.4
通讯作者：
Tian Yuyu
中科院分区：
文献类型：
--
作者：
Wang Yimin;Zhao Mingzhe;Chang Jianxia;Wang Xuebin;Tian Yuyu
风力发电的高度随机性、不确定性和不可控性使得大规模风力发电对并网提出了很大的挑战。为了提高风电场的电能质量，促进风电并网，本文对水电风电联合补偿运行的原理进行了探讨。根据水电风互补运行的原理，推导了水电风互补容量的计算方法。然后，提出了基于水电风电补偿原理的水热风混合电力系统优化运行模型，以利用水电风电补偿和水电调峰能力，最大限度地减少二氧化碳排放，获得混合电力系统的最佳运行调度。在该模型中，采用基本负荷和非基本负荷输出排放率来估计不同功率输出过程的二氧化碳排放量和减排效益。此外，提出了三种方案的运行模式，以证明水-风功率补偿原则在实践中的适用性。以西北电网为例，通过与历史运行数据的比较，验证了该模型的有效性。结果表明，水火风联合优化运行中，水电风电功率补偿原则起着关键作用。此外，该模型可以提高风力发电，减少电网的二氧化碳排放。特别是西北电网每年可减少二氧化碳排放量约1696* 104 t。该研究为大规模风电接入电网的优化调度提供了一种方法，为全球其他可再生能源的大规模利用提供了有价值的参考。
The high randomness, intermittency and uncontrollability of wind power make large-scale wind power generation present large challenges for integration into a power grid. In this paper, the principles of hydro-wind compensating operation are explored, aiming at improving the power quality of wind power and promoting the integration of wind power into the power grid. Based on the principles of hydro-wind compensating operation, the calculation method of the hydropower compensation capacity for wind power is derived. Then, an optimizing operation model of a hydro-thermal-wind hybrid power system based on the hydro-wind power compensating principle is proposed to minimize the carbon dioxide emissions and obtain optimal operation scheduling of the hybrid power system by taking advantage of hydro-wind compensation and the peak regulation capacity of hydropower. In this model, the baseload and nonbaseload output emission rates are adopted to estimate the carbon dioxide emissions of different power output processes and the emission reduction benefits. Moreover, three scenarios of the operation mode are proposed to demonstrate the applicability of the hydro-wind power compensating principle in practice. The Northwest Power Grid in China is selected as a case study to verify the effectiveness of the proposed model compared to historical operating data. The results indicate that the hydro-wind power compensating principle plays a crucial role in hydro-thermal-wind combined optimal operation. Additionally, the proposed model can improve the wind power generation and reduce the carbon dioxide emissions of the power grid. In particular, the carbon dioxide emissions can be reduced by approximately 1696*104t each year in the Northwest Power Grid. This study provides an approach to schedule optimal operation plans for power grids with large-scale wind power and provides a valuable reference for the large-scale utilization of other kinds of renewable energy worldwide.