含风电和储能的电力系统安全约束机组组合问题研究

针对含风电的电力系统安全约束机组组合问题,利用储能的快速双向调节能力改善风电出力的波动性和不确定性,提高系统运行的经济性。机组组合模型中考虑风电、负荷预测误差对机组组合的影响,并引入基于可信理论的旋转备用机会约束条件,可避免造成备用的过度配置。另外,通过考虑合理弃风提高消纳风电能力和降低系统运行成本,分析了储能参数以及接入系统方式对机组组合模型中系统运行成本和风电弃风量的影响。最后,采用新英格兰10机系统验证了所提模型的有效性。

Research on Security-Constrained Unit Commitment of Power Systems with Wind Farm and Energy Storage

As to such issue as security-constrained unit commitment (SCUC) of power systems with wind farm, the volatility and uncertainty of wind power output are improved by means of the fast two-way regulation capacity of energy storage, then operation cost is also reduced. Taking the impact of prediction error of wind power and demand on SCUC into account, the over allocation of reserve can be avoided by introducing the chance constrained formulation of spinning reserve based on trusted theory. In addition, reasonable curtailment can be applied to enhance the accommodation capability of wind power and reduce operation cost. The impact of energy storage parameters and its grid-connected approach on system operation cost and wind curtailment in SCUC are also analyzed in this paper. In the end, 10-machine New England power system is used to validate the proposed model.