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

具有可控AC-DC变换器的通用AC-DC潮流求解方法

• 批准号: RGPIN-2020-04509
• 负责人: Mahseredjian, Jean
• 金额: $ 4.01万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=717076
• 关键词: Generic; AC; DC; load; flow

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.

具有可控AC-DC变换器的通用AC-DC潮流求解方法 该项目旨在研究能够考虑将基于逆变器的系统集成到传统交流电网中的潮流计算方法。该项目针对具有交流微电网、混合交直流微电网和多端VSC HVDC系统的配电电网。 目标是提供新的通用潮流解决方法，能够同时求解耦合的交流-直流网络，以建立稳态条件，同时考虑转换器控制和各种操作模式。非线性潮流解决方案将基于添加到传统交流潮流方程中的转换器约束。潮流解之后是稳态解。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 系统稳态相量以及显着减少在具有 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产生影响。 其目标不仅是为系统运营商和规划人员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。这项研究还包括允许分析可再生能源的间歇性的潮流时间序列解决方案。 所提出的新方法将在交流和混合交流/直流微电网基准以及多端 VSC-HVDC 系统基准上进行测试。将展示光伏和风力涡轮机等可再生能源大规模整合的测试案例。将模拟超大规模的输配电网。将证明所提出的研究可以自动化研究现代电力系统的工程任务。它将减少时域中执行的模拟的模拟设置和初始化时序。它将为研究交流/直流系统和提高此类系统的运行稳健性和效率提供强大的新手段。 拟议的工作将对世界上日益流行的交流/直流系统领域的研究产生影响。这将使参与此类系统部署的加拿大工业受益。它还将使加拿大的模拟软件开发行业受益。