摘要
对风力发电设备来说最为重要的几个技术挑战,包括电压控制、无功功率管理、动态功角稳定和电网扰动后风力发电机的行为等。集成到每台风力发电机电力电子装置中的电气控制以及机械控制,跟风电场控制系统结合在一起,已经具备控制大量风力发电机的能力,使这些风力发电机在电网连接点表现为一个统一的发电厂。这一先进的有功功率和无功功率分层控制的动态性能在大多数情况下超越了现代传统同步发电机。本文详细阐述了其中几个重要功能如下:①风力发电场控制功能,包括在准稳态和动态条件下的电网电压控制;②低电压穿越特性,包括风力发电机在严重电网扰动后的表现;③风力发电机的动态功率控制功能,包括针对功率摇摆的暂态和动态控制性能。
In China, as in other parts of the world, many of the best resources for wind generation are located far away from load centers. Large generating facilities connected to distant load centers by long ac transmission lines face numerous technical challenges, regardless of the type of generating facility. This paper addresses some of the most significant challenges for wind generation facilities, including voltage control, reactive power management, dynamic power-swing stability, and behavior following disturbances in the power grid. Wind generation technology has evolved significantly over the past several years, and proven solutions to these technical challenges now exist. Controls integrated into the power electronics and mechanical controls of individual wind-turbine-generators, combined with integrated wind-farm control systems, have the capability of controlling numerous wind turbines so that they act as one unified generating plant at the point of interconnection with the power grid. This advanced hierarchical control of both real and reactive power output can provide dynamic performance that is, in many cases, superior to that achievable with modem conventional synchronous generation. This paper describes： ① Wind farm control functions, including performance for controlling grid voltage in quasi-steady-state and dynamic conditions. ② Low-voltage ride-through characteristics, including performance following severe system disturbances. ③ Dynamic power control functions within wind turbine-generators, including transient and dynamic performance for power swings.
出处
《电工技术学报》
EI
CSCD
北大核心
2007年第7期29-36,共8页
Transactions of China Electrotechnical Society
关键词
风力发电
风电场接入
低电压穿越
LVRT
电压调整
功率摇摆
Wind generation, wind farm integration, low voltage ride through, LVRT, voltage regulation, power swings
