潮流计算和机电暂态仿真中风光储联合发电系统的实用等值方法

针对工程实际开展风光储联合发电系统在潮流计算和机电暂态仿真中的等值方法研究,旨在为大容量风光储联合发电系统的并网仿真分析奠定基础。将潮流计算的等值分为单元机组和集电系统2部分来研究。单元机组等值采用根据不同控制模式选取不同节点类型的方法,针对集电系统等值提出基于损耗不变原则的方法。等值模型和详细模型的算例结果表明,潮流计算等值方法具有较好的精度。在机电暂态仿真动态等值中,基于实际工程计算的最严重工况分析原则,提出运行在满出力点的单机"倍乘"等值模型,为工程计算中的风光储联合发电系统动态等值提供了一种解决方案。

Equivalent Method of Integrated Power Generation System of Wind,Photovoltaic and Energy Storage in Power Flow Calculation and Transient Simulation

The equivalent method of integrated power generation system of wind,photovoltaic(PV) and energy storage in power flow calculation and transient simulation was proposed based on actual projects,so as to establish the foundation of its connected-grid simulation and analysis.In power flow calculation,it included the equivalence of unit plants and collection system.Unit plants were equivalent to several nodes of different types by control modes,and collecting system was equivalent to a single system by principle of constant power-loss.The comparison of the equivalent model and detail model in a sample verified the correction and accuracy of the proposed method.In transient simulation,according to the analysis principle of the most serious condition,a multiply equivalent method of full-output unit plant was presented,which supplies a solution to dynamic equivalence for practical engineering.