Selective Power Routing in MTDC Grids for Inertial and Primary Frequency Support
Selective Power Routing in MTDC Grids for Inertial and Primary Frequency Support
复制标题
DOI：
10.1109/tpwrs.2018.2854647
复制
发表时间：
2018-07
影响因子：
6.6
通讯作者：
Sai Gopal Vennelaganti;N. Chaudhuri
中科院分区：
文献类型：
--
作者：
Sai Gopal Vennelaganti;N. Chaudhuri
探讨了通过多端直流（MTDC）电网以最小通信量有选择地向异步交流地区提供惯性和主频率支持作为紧急支持服务的可能性。在标称条件下，只有电压下降被认为是允许交流系统异步运行，因为他们是为了。当交流系统需要支持时，相应的转换器通过用于公共直流电压下降控制的直流线路或现有通信信道通过遇险信号传输基本信息。在交流侧扰动之后，频率下降被激活，其值基于我们提出的设计程序预先确定，这确保了通过选择性转换器参与来支持主频率。模型预测控制，其目的是实现最佳的频率动态与单点致动也实施在连接到受影响的区域，以提供惯性支持的换流站。在转换器断电后，MTDC电源参考被修改，以确保对AC侧频率的影响最小。仿真研究表明所提出的策略的有效性。
The possibilities of selectively providing inertial and primary frequency support as an emergency support service to asynchronous AC areas through multiterminal direct current (MTDC) grid with minimal-communication are explored. Under nominal condition, only voltage droop is considered to allow the AC systems operate asynchronously as they are meant to. When an AC system needs support, the corresponding converter transmits basic information via a distress signal through the DC lines or existing communication channels used for common DC voltage-droop control. Following AC-side disturbances, the frequency droop is activated with values that are predetermined based on our proposed design procedure, which ensures primary frequency support through selective converter participation. Model predictive control, which aims to achieve the best possible frequency dynamics with a single-point actuation is also implemented at the converter station connected to the affected area to provide inertial support. Following a converter outage, MTDC power references are modified to ensure minimal impact on the AC-side frequencies. Simulation studies showing the effectiveness of the proposed strategies are presented.