基于连续潮流计算的VSC-MTDC异步互联电网换流站参数优化方法

Parameter Optimization Method of VSC-MTDC Asynchronous Interconnected Power Grid Based on Continuous Power Flow Calculation

针对由多端口柔性直流输电网络(VSC-MTDC)进行连接的异步互联电网,本文提出了一种基于连续潮流计算的换流站整定参数优化方法。该方法以全网静态电压稳定裕度最大化为优化目标,以分区断面传输功率恒定为等式约束条件,以遗传算法为计算核心,对各VSC换流站的整定控制参数进行优化。本文利用IEEE-RTS96仿真系统对所提优化方法进行验证。结果显示,本文所提方法可以在保证分区间传输功率恒定的前提下得到最优的换流站整定控制参数方案,有效提升系统的电压稳定性。

For the asynchronous interconnected power grid connected by multi port VSC-MTDC, this paper presented an optimization method of converter station setting parameters based on continuous power flow calculation. In this method, the optimization target was to maximize the static voltage stability margin of the whole network, the equal constraint condition was to keep the transmission power of the partition section constant, and the genetic algorithm was used as the calculation core to optimize the setting control parameters of each VSC converter station. This paper used IEEE-RTS96 simulation system to verify the proposed optimization method. The results show that the method proposed in this paper can obtain the optimal scheme of converter station setting control parameters under the premise of ensuring the transmission power between the zones is constant, and effectively improve the voltage stability of the system.