风机有功控制对系统暂态功角第二摆稳定性影响机理
发布时间：2018-09-01 19:14
【摘要】：该文着重研究大规模集中并网的双馈风电基地故障后有功控制行为对系统暂态功角第二摆稳定性的影响机理。首先基于静态扩展等面积定则,对双馈感应式风机接入后系统的网络节点电压方程进行改进,构建适用于含风电多机系统暂态功角稳定性定量分析的等值单机无穷大系统模型;利用该模型对双馈风机与两台同步机互联的简化系统进行解析分析,分别给出风电并网系统暂态功角第二摆失稳的充分条件、必要条件,揭示出故障后风机有功出力低会降低第二摆稳定性;进一步分析风电并网系统中功角第二摆稳定性与第一摆稳定性的关系,从整体上揭示风机有功恢复速率变慢会使原本只会出现首摆失稳的系统发生第二摆失稳,并最终导致系统整体稳定性下降;最后对机理分析进行仿真验证。所做研究拓展了当前风电并网后只关注首摆失稳的暂态功角稳定性分析方法,为大规模风电集中并网电力系统暂态稳定控制提供理论指导。
[Abstract]:This paper focuses on the influence of active power control behavior on the stability of the second pendulum in the transient power angle of a large scale centralized grid-connected wind power station. Firstly, based on the static expansion equal-area rule, the network node voltage equation is improved after the doubly-fed induction fan is connected into the system, and the equivalent single-machine infinite bus system model suitable for quantitative analysis of transient power angle stability of multi-generator system with wind power is constructed. By using this model, the simplified system interconnected with two synchronous machines is analytically analyzed, and the sufficient conditions and necessary conditions for the second pendulum instability of the transient power angle of the wind power grid connected system are given, respectively. It is revealed that the stability of the second pendulum will be reduced by the low active power output of the fan after failure, and the relationship between the stability of the second pendulum at the power angle and the stability of the first pendulum in the wind power grid-connected system is further analyzed. As a whole, it is revealed that the slow recovery rate of the active power of the fan will cause the second swing instability of the original system which only occurs in the first swing instability, and eventually lead to the overall stability of the system. Finally, the mechanism analysis is verified by simulation. The research extends the transient power angle stability analysis method which only pays attention to the first swing instability after wind power grid connection, and provides theoretical guidance for large-scale wind power centralized grid-connected power system transient stability control.
【作者单位】： 新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家重点研发计划项目课题(2016YFB0900105) 国家自然科学基金重大项目课题(51190103) 国家电网公司科技项目(大型风电/光伏发电基地功率汇集与外送技术研究)~~
【分类号】：TM614;TM712
[Abstract]:This paper focuses on the influence of active power control behavior on the stability of the second pendulum in the transient power angle of a large scale centralized grid-connected wind power station. Firstly, based on the static expansion equal-area rule, the network node voltage equation is improved after the doubly-fed induction fan is connected into the system, and the equivalent single-machine infinite bus system model suitable for quantitative analysis of transient power angle stability of multi-generator system with wind power is constructed. By using this model, the simplified system interconnected with two synchronous machines is analytically analyzed, and the sufficient conditions and necessary conditions for the second pendulum instability of the transient power angle of the wind power grid connected system are given, respectively. It is revealed that the stability of the second pendulum will be reduced by the low active power output of the fan after failure, and the relationship between the stability of the second pendulum at the power angle and the stability of the first pendulum in the wind power grid-connected system is further analyzed. As a whole, it is revealed that the slow recovery rate of the active power of the fan will cause the second swing instability of the original system which only occurs in the first swing instability, and eventually lead to the overall stability of the system. Finally, the mechanism analysis is verified by simulation. The research extends the transient power angle stability analysis method which only pays attention to the first swing instability after wind power grid connection, and provides theoretical guidance for large-scale wind power centralized grid-connected power system transient stability control.
【作者单位】： 新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家重点研发计划项目课题(2016YFB0900105) 国家自然科学基金重大项目课题(51190103) 国家电网公司科技项目(大型风电/光伏发电基地功率汇集与外送技术研究)~~
【分类号】：TM614;TM712
【相似文献】
相关期刊论文 前10条
1 梁振光;发电机功角的实时计算方法[J];继电器;2004年01期
2 曹阳;高琳;，
本文编号：2218098
本文链接：https://www.wllwen.com/kejilunwen/dianlidianqilunwen/2218098.html
