新型直流输电系统典型扰动暂态响应特性

采用新型换流变压器及其感应滤波技术的直流输电系统在拓扑电路结构上不同于现有任何形式的直流输电联结方式。文中基于CIGRE直流输电标准测试系统模型及其主电路参数,根据新型换流变压器及其感应滤波系统的技术特点,设计了一套与标准测试系统主电路参数相一致的新型直流输电模型测试系统,并对新系统和传统系统在实际工程中所可能遭受到的各种典型扰动及其暂态响应特性进行了详细的仿真计算。仿真结果表明,采用直流输电标准控制模式的新型直流输电系统进一步提升了对直流输送功率的调节裕度,具有较好的暂态稳定性,在遭受各种典型扰动时均能够稳定、充裕地运行。

Transient Response Characteristics of a New HVDC Transmission System Subjected to the Typical Disturbances

The topological circuit of the new DC transmission system based on the new converter transformer and its inductive filtering system is different from that of any existing high voltage DC transmission system(HVDC).Based on the CIGRE HVDC first benchmark model,a new testing system is designed using the same parameters.The transient response characteristics of the conventional and the new system are simulated in detail with various typical disturbances that may occur in reality.The simulation show that the new system further increases the regulating margins of the HVDC transmitted power and retain satisfactory transient response characteristics.The system operates stably and adequately following various typical disturbances.