基于储能系统交互的新能源发电和负荷波动柔性控制策略研究

Research on control strategy about new energy power generation and load fluctuation flexibility based on energy storage system interaction

针对含新能源接入输电网的末端稳定性较低的现象,基于某区域电网新能源发电和负荷波动特性,通过建立风力发电、光伏发电、波动负荷、储能系统的数学模型和制定适合储能系统与波动负荷、新能源发电的动态交互功率控制策略的方法,得到储能系统能够通过交互功率抑制新能源和负荷波动的结论。基于PSCAD/EMTDC平台仿真的结果表明,所提控制策略能够可靠消纳新能源发电的功率波动,有效消除"峰谷"差异对输电网的影响,大大减小了用电高峰的发电和输电压力,显著降低了电力系统旋转备用容量。

In view of the phenomena of lower stability at the end of the transmission network with access to new en- ergy, and based on the new energy power generation and load fluctuation characteristics of power grid in a region, the mathematical model comprised of wind power generation, photovoltaic power generation, fluctuating load and energy storage system is established and the dynamic interaction power control strategy is developed, suitable for energy storage system and fluctuating load and the new energy power generation. So much so, the conclusion is ob- tained that the energy storage system can suppress the new energy and load fluctuation through interactive power. Based on the results of PSCAD/EMTDC platform simulation, the proposed control strategy can reliably absorb the power fluctuation of the new energy power generation, effectively eliminate the influence of the ＂ peak valley＂ difference on the transmission network, greatly reduce the power generation and transmission pressure at electricity peak , and significantly reduce the rotation reserve capacity of power system.