考虑风电接入的电网静态电压安全域计算  

Calculation of power grid static voltage security region considering wind power integration

作　　者：周刚 肖斐[2] 艾芊[2] 谢善益 张宇帆 ZHOU Gang;XIAO Fei;AI Qian;XIE Shanyi;ZHANG Yufan(Guangdong Power Grid Co.,Ltd.Electric Power Research Institute,Guangzhou 510080,China;Department of Electrical Engineering,Shanghai Jiaotong University,Shanghai 200240,China)

机构地区：[1]广东电网有限责任公司电力科学研究院,广东广州510080 [2]上海交通大学电气工程系,上海200240

出　　处：《电力工程技术》2020年第3期23-29,共7页Electric Power Engineering Technology

基　　金：中国南方电网有限责任公司科技项目(GDKJXM20162540);国家高技术研究发展计划(863计划)资助项目(2015AA050404)。

摘　　要：实现快速、有效的系统安全裕度评估,能够为系统运行控制提供决策指导。为掌握电网的安全运行态势,提出一种考虑风电接入的电网静态电压安全域计算方法。首先,利用连续潮流模型并结合电压安全约束,构建系统电压安全裕度指标,用于衡量运行点的安全状态。其次,融合灵敏度方程和启发式算法求得电压安全裕度,实现负荷裕度量化评估。然后,通过引入考虑相关性的风速预测方法,为态势预测奠定基础。最后,通过IEEE 118节点测试系统验证所提方法的有效性和可行性。通过算例仿真可知,当风电渗透率较高时,风电场出力之间的相关度越大,电压安全裕度的波动范围也越大。Fast and effective assessment of power systems security region can provide decision-making guidance for system operation.In order to identify operational state of power system,a method of static voltage security region(SVSR)considering wind power integrated is presented.Firstly,index of voltage security margin is presented by combining continuous power flow model and condition of limit induced bifurcation,which could quantify the level of voltage security.Then,hyper-planes of SVSR boundary by blending quasi steady state equation and heuristic algorithm are calculated.The hyper-planes assist in online assessment of security state and load margin.Further,the method of wind power forecasting considering correlation is introduced,which establishes foundation for situation prediction.Finally,the correctness and effectiveness of the proposed method are demonstrated by cases studied in the IEEE 118-bus system.The simulation results show that when the permeability of wind power is high,correlation between wind power output and fluctuation range of voltage safety margin are greater.

关 键 词：风电 电压安全裕度指标 静态电压安全裕度 灵敏度方程 启发式算法 

分 类 号：TM732[电气工程—电力系统及自动化]