计及新能源构网控制参数的机组组合模型
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TM73

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国家自然科学基金资助项目(U2066210)


Unit combination model considering the grid-forming control parameters of new energy station
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    摘要:

    为了在新能源机组组合时充分发挥其灵活调节能力,弥补新能源接入造成的系统惯量缺失,文中以构网型新能源惯量支撑与一次调频能力为基础,采用新能源减载存储备用容量的手段,构建计及动态频率约束及新能源构网控制参数的机组组合模型,并将该非线性混合整数规划模型转化为多目标双层优化问题进行迭代求解,从而获得满足系统频率约束条件的同步机最优开机方式以及新能源最优减载量与对应的控制参数。以甘肃某风电高占比送端电网为例进行仿真验证分析,算例结果表明,与现有仅考虑频率约束的方案以及恒定构网控制参数的机组组合方案相比,文中所提可变构网控制参数的机组组合方案在频率安全约束条件下能进一步提升系统运行经济性和新能源利用率。

    Abstract:

    In order to take advantage of the flexible adjustment ability with new energy in unit combination and make up for the lack of system inertia caused by new energy access,a unit combination model is constructed in this paper,which takes the inertia support and primary frequency regulation capabilities of grid-forming new energy. The model incorporates dynamic frequency constraints and grid-forming control parameters,utilizing the shedding capacity stored through new energy curtailment. Then,the nonlinear mixed integer programming model is transformed into a multi-objective two-layer optimization problem for iterative solution. Thus,the optimal start-up mode of synchronous generators,the optimal reduction of new energy and the corresponding control parameters are obtained which meet the system frequency constraints. A high proportion of wind power transmission grid in Gansu province is taken as an example to verify the method. The results show that compared with the existing scheme that only considers frequency constraints and the unit combination scheme with constant grid-forming control parameters,the unit combination scheme with variable grid-forming control parameters proposed in this paper can further improve the system operation economy and new energy utilization rate under the frequency security constraints.

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黄慧,丁浩寅,郄朝辉,常海军,黄志光,吕睿.计及新能源构网控制参数的机组组合模型[J].电力工程技术,2025,44(2):100-110

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  • 收稿日期:2024-08-10
  • 最后修改日期:2024-10-27
  • 在线发布日期: 2025-04-03
  • 出版日期: 2025-03-28
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