摘 要
随着城市化进程加快，城市电网面临负荷增长快、供电可靠性要求高及可再生能源接入需求增加等挑战。为此，本文探索柔性直流输电技术在城市电网中的应用，旨在提高城市电网的灵活性、可靠性和接纳可再生能源的能力。基于理论分析与仿真研究相结合的方法，首先建立柔性直流输电系统的数学模型，再利用PSCAD/EMTDC软件搭建仿真平台，对不同运行工况进行模拟。结果表明，柔性直流输电技术能够有效减少电压波动和频率偏移，增强电网稳定性，且便于调控可再生能源发电功率。创新性地提出一种适用于城市电网的柔性直流输电系统拓扑结构，该结构集成多种功能于一体，不仅简化了系统设计，还降低了建设成本，为城市电网升级改造提供了新思路，对推动城市电网向智能化、高效化发展具有重要意义。
关键词：柔性直流输电技术；城市电网；可再生能源接入
Abstract
With the acceleration of urbanization, urban power grids are confronted with challenges such as rapid load growth, high requirements for power supply reliability, and increasing demands for renewable energy integration. This paper explores the application of flexible direct current (HVDC) transmission technology in urban power grids to enhance flexibility, reliability, and the capacity to accommodate renewable energy sources. By integrating theoretical analysis with simulation studies, a mathematical model of the HVDC transmission system is established, followed by the development of a simulation platform using PSCAD/EMTDC software to simulate various operating conditions. The results indicate that HVDC technology can effectively reduce voltage fluctuations and frequency deviations, thereby enhancing grid stability and facilitating the control of renewable energy generation power. An innovative HVDC system topology suitable for urban power grids is proposed, which integrates multiple functions into a single structure. This not only simplifies system design but also reduces construction costs, providing new insights for the upgrade and transformation of urban power grids, and significantly contributing to the advancement of urban power grids towards smarter and more efficient operations.
Keywords: Flexible Direct Current Transmission Technology；Urban Power Grid；Renewable Energy Integration
目 录
引言 1
一、柔性直流输电技术概述 1
（一）技术原理与特点 1
（二）发展历程回顾 1
（三）关键技术难点 2
二、城市电网需求分析 2
（一）城市电网现状 3
（二）用电负荷特性 3
（三）对新技术的需求 3
三、柔性直流输电的应用场景 4
（一）分布式电源接入 4
（二）重要负荷供电 4
（三）电网互联方案 5
四、应用效益与挑战 5
（一）经济效益评估 5
（二）系统稳定性影响 6
（三）面临的主要挑战 6
结 论 7
致 谢 8
参考文献 9
随着城市化进程加快，城市电网面临负荷增长快、供电可靠性要求高及可再生能源接入需求增加等挑战。为此，本文探索柔性直流输电技术在城市电网中的应用，旨在提高城市电网的灵活性、可靠性和接纳可再生能源的能力。基于理论分析与仿真研究相结合的方法，首先建立柔性直流输电系统的数学模型，再利用PSCAD/EMTDC软件搭建仿真平台，对不同运行工况进行模拟。结果表明，柔性直流输电技术能够有效减少电压波动和频率偏移，增强电网稳定性，且便于调控可再生能源发电功率。创新性地提出一种适用于城市电网的柔性直流输电系统拓扑结构，该结构集成多种功能于一体，不仅简化了系统设计，还降低了建设成本，为城市电网升级改造提供了新思路，对推动城市电网向智能化、高效化发展具有重要意义。
关键词：柔性直流输电技术；城市电网；可再生能源接入
Abstract
With the acceleration of urbanization, urban power grids are confronted with challenges such as rapid load growth, high requirements for power supply reliability, and increasing demands for renewable energy integration. This paper explores the application of flexible direct current (HVDC) transmission technology in urban power grids to enhance flexibility, reliability, and the capacity to accommodate renewable energy sources. By integrating theoretical analysis with simulation studies, a mathematical model of the HVDC transmission system is established, followed by the development of a simulation platform using PSCAD/EMTDC software to simulate various operating conditions. The results indicate that HVDC technology can effectively reduce voltage fluctuations and frequency deviations, thereby enhancing grid stability and facilitating the control of renewable energy generation power. An innovative HVDC system topology suitable for urban power grids is proposed, which integrates multiple functions into a single structure. This not only simplifies system design but also reduces construction costs, providing new insights for the upgrade and transformation of urban power grids, and significantly contributing to the advancement of urban power grids towards smarter and more efficient operations.
Keywords: Flexible Direct Current Transmission Technology；Urban Power Grid；Renewable Energy Integration
目 录
引言 1
一、柔性直流输电技术概述 1
（一）技术原理与特点 1
（二）发展历程回顾 1
（三）关键技术难点 2
二、城市电网需求分析 2
（一）城市电网现状 3
（二）用电负荷特性 3
（三）对新技术的需求 3
三、柔性直流输电的应用场景 4
（一）分布式电源接入 4
（二）重要负荷供电 4
（三）电网互联方案 5
四、应用效益与挑战 5
（一）经济效益评估 5
（二）系统稳定性影响 6
（三）面临的主要挑战 6
结 论 7
致 谢 8
参考文献 9
