CAJ | 학술논문

直流并网结构可以有效避免传统交流并网结构中能量转换效率低、灵活性差的缺点。通过对各类典型直流并网风电场的拓扑结构进行分析，从能耗、建设成本和适用性等方面，概述了应用变流器作为电能转换环节的各直流并网风电场特性，重点分析了直流升压型的并网拓扑结构，并将各直流并网结构相互对比，剖析了不同结构的优缺点。与传统结构相比，风电场直流并网的结构易实现单位功率因数控制，拥有良好的长远距离输电能力，具有很强的可控性和稳定性。
직류병망결구가이유효피면전통교류병망결구중능량전환효솔저、령활성차적결점。통과대각류전형직류병망풍전장적탁복결구진행분석，종능모、건설성본화괄용성등방면，개술료응용변류기작위전능전환배절적각직류병망풍전장특성，중점분석료직류승압형적병망탁복결구，병장각직류병망결구상호대비，부석료불동결구적우결점。여전통결구상비，풍전장직류병망적결구역실현단위공솔인수공제，옹유량호적장원거리수전능력，구유흔강적가공성화은정성。
The disadvantages such as low energy conversion efficiency, insufficient flexibility in traditional AC grid-connection of wind farm can be effectively by DC grid-connection of wind farm. Topological structures of various typical DC grid-connection of wind farm are presented, and from the aspects of energy consumption, construction cost and applicability the characteristics of various structures for DC grid-connection of wind farm, in which the converters are used as electric energy conversion components, are summarized, and the analysis is focused on topological structure of DC boost-type grid-connection of wind farm, and different types of topological structures of DC grid-connection of wind farm are compared one another and the merit and demerit of different topological structures are dissected. Comparing with traditional topology structures, the unity power factor control is easy to be achieved by the structure of DC grid-connection, which possesses good long-distance transmission capability and is of strong controllability and stability.