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首页> 外文会议>European Conference on Power Electronics and Applications >A Communication-less Cooperative dc Voltage Control Technique for a Multi-terminal HVDC Transmission System Using H∞ Control
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A Communication-less Cooperative dc Voltage Control Technique for a Multi-terminal HVDC Transmission System Using H∞ Control

机译：一种用于多终端HVDC传输系统的可通信的协作直流电压控制技术，使用H ∞控制

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摘要

New and upcoming regulations are requiring converters in high voltage direct current (HVDC) connections to be able provide a rapid response to support the stability of the main synchronous network to which they are connected. However, currently proposed droop-controlled HVDC networks that cover a wide geographical area require communication between converters to update the droop coefficients. The reliance on the communication becomes a limiting factor in the development of MTDC networks. In this paper, we present a novel communication-less and cooperative dc voltage control technique for a multi-terminal HVDC transmission system that employs an H∞ controller for the voltage regulation. One grid side converter, called the master, and an offshore wind farm are designated to guarantee the main dc voltage stability as well as to maintain a power reserve for the provision of fast grid support services. A flexible main dc voltage level is maintained by the master converter to control the power output and to indirectly signal to the wind farm to inject more or less power, hence no dedicated communication system is needed. An H°° local dc voltage controller is designed to manage efficiently the reserve of power in the form of de-loaded wind turbines. The proposed controller acts on the blade pitch angle and guarantees the internal stability of the presented multi-terminal HVDC (MTDC) transmission system locally around an equilibrium (operating) point. The studied MTDC consists of three converter terminals, a master converter, a standard active/reactive power converter and an offshore wind farm. The effectiveness of the proposed control strategy is validated through preliminary simulation results in MATLABR?-SIMULINKR?.
机译：新的和即将到来的法规需要在高压直流（HVDC）连接中的转换器能够提供快速响应，以支持它们所连接的主同步网络的稳定性。然而，目前提出的下垂控制的HVDC网络覆盖了广泛的地理区域需要在转换器之间进行通信以更新下垂系数。对通信的依赖成为MTDC网络的开发中的限制因素。在本文中，我们为采用H的多终端HVDC传输系统提供了一种新的通信和协作直流电压控制技术∞ 控制器用于电压调节。指定一个电网侧转换器，称为船长和海上风电场，以保证主直流电压稳定性，并维持提供快速网格支架服务的动力储备。柔性主直流电压电平由主转换器维护，以控制电源输出并间接信号到风电场以注入或多或少的功率，因此不需要专用通信系统。 H°局部直流电压控制器设计用于以卸载风力涡轮机的形式有效地管理功率储备。所提出的控制器采用刀片桨距角，并确保所提出的多端HVDC（MTDC）传输系统的内部稳定性围绕平衡（操作）点。研究的MTDC由三个转换器终端，主转换器，标准主动/无功转换器和海上风电场组成。通过Matlabr的初步模拟结果验证了所提出的控制策略的有效性？-Simulinkr.？。

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