Generic AC-DC load-flow solution method with controllable AC-DC converters

具有可控AC-DC转换器的通用AC-DC潮流计算方法本项目旨在研究能够将基于逆变器的系统整合到传统AC电网中的潮流计算方法。该项目针对具有AC微电网、混合AC/DC微电网和多端VSC HVDC系统的配电电网。 我们的目标是提供新的和通用的潮流解决方案的方法，能够同时解决耦合AC-DC网络建立稳态条件，同时占转换器控制和各种操作模式。非线性潮流的解决方案将基于转换器的约束添加到传统的交流潮流方程。负荷流解之后是稳态解。稳态解决方案将使用集总网络模型来确定所有相量，并允许自动计算导致时域模拟的初始条件。这种初始化应该通过确定准确的AC-DC系统稳态相量以及通过显著减少在具有AC-DC转换器的电网的基于电路的时域仿真中浪费的计算时间来影响。其目标不仅是为系统运营商和规划者提供先进的潮流分析工具，而且还为基于逆变器的大型电力系统的详细时域仿真提供强大的初始化方法。负荷流量时间序列的解决方案，允许分析可再生能源的间歇性，也将包括在这项研究中。提出的新方法将在AC和混合AC/DC微电网基准以及多端VSC-HVDC系统基准上进行测试。将展示大规模集成可再生能源的测试案例，如光电子和风力涡轮机。将模拟非常大规模的输电和配电网。它将表明，拟议的研究可以自动化工程任务，研究现代电力系统。它将减少在时域中执行的模拟的模拟设置和初始化时间。它将为研究AC/DC系统和提高此类系统的运行鲁棒性和效率提供强大的新手段。拟议的工作将影响研究领域的AC/DC系统，这是越来越受欢迎的世界。这将有利于参与部署这种系统的加拿大工业。这也将有利于加拿大参与模拟软件开发的行业。

Generic AC-DC load-flow solution method with controllable AC-DC converters This project is for conducting research on load-flow computation methods capable of accounting for the integration of inverter-based systems into traditional AC power grids. The project targets distribution power grids with AC microgrids, hybrid AC/DC microgrids and multiterminal VSC HVDC systems. The objective is to deliver new and generic load-flow solution methods capable of simultaneously solving coupled AC-DC networks for establishing steady-state conditions while accounting for converter controls and various operating modes. The nonlinear load-flow solution will be based on converter constraints added into traditional AC power-flow equations. The load-flow solution will be followed by steady-state solution. The steady-state solution will use lumped network models to determine all phasors and to allow for automatic computation of initial conditions leading into time-domain simulations. Such initialization should impact by determining accurate AC-DC system steady-state phasors and by dramatically reducing computing times wasted in the circuit-based time-domain simulation of grids with AC-DC converters. The objective is not only to provide advanced load-flow analysis tools to system operators and planners, but to also deliver powerful initialization methods for detailed time-domain simulations of inverter-based and large-scale power systems. Load-flow time-series solutions allowing to analyze the intermittent nature of renewable energy sources, will be also included in this research. The proposed new methods will be tested on AC and hybrid AC/DC microgrid benchmarks, as well as on multiterminal VSC-HVDC system benchmarks. Test cases with large scale integration of renewable energy sources, such as photovoltaics and wind turbines will be demonstrated. Very large-scale transmission and distribution grids will be simulated. It will be shown that proposed research can automate engineering tasks for studying modern power systems. It will reduce simulation setup and initialization timings for simulations performed in time-domain. It will deliver powerful new means for studying AC/DC systems and for increasing the operational robustness and efficiency of such systems. The proposed work will impact on research in the field of AC/DC systems which are becoming increasingly popular in the world. It will benefit the Canadian industry involved in the deployment of such systems. It will also benefit the Canadian industry involved in simulation software development.