中文摘要：

针对南汇柔性直流工程控制指标参数制定过于保守问题，提出控制指标阈值合理的参数范围。分析系统运行方式，提取系统运行参数，建立仿真模型；结合换流器控制策略，设计动作时序。从基础运行方式-并列方式入手，研究各个参数值的变化对装置启动过程的影响，然后再分析其他运行方式。通过大量仿真计算，得出了参数合理运行范围，其中分列运行方式需要调整定频曲线的单位调节功率参数，其余参数均参考并列运行方式即可。

英文摘要：

The paper defines the reasonable parameter range for control indicator threshold to solve the problem that the control indicator parameters for Nanhui Flexible HVDC project are too conservative. System parameters are formulated through analyzing the system operation mode, and correspondingly the simulation model is built. Operation sequence is designed in combination with converter control strategies. Based on the parallel mode, the research focuses on the effects of each parameter change on HVDC equipment starting process ; then the other modes are studied likewise. Through a great deal of simulation calculation, the reasonable parameter operation range is defined. In particular, the separate operation mode needs to adjust the unit regulated power parameters of constant-frequency curve, while the remaining parameters can be referred to parallel operation mode.