基于MMC的RPC环流抑制策略

RPC能够对电气化铁路中产生的负序和无功进行就地综合补偿，适用于对高速铁路突出的负序和谐波问题进行综合治理，但RPC受到器件性能的限制难以增大其容量从而影响RPC未来的发展。针对这一问题，有学者提出基于单相MMC的RPC综合补偿装置（MRPC），MRPC提高了应用的电压等级，有利于适应高压大功率场合。但MRPC中的环流增大了系统损耗，影响了系统稳定，严重时可能导致系统崩溃。针对这一问题，本文详细推导了MRPC的数学模型；分析了环流形成的机理；最后提出了一种环流抑制策略。仿真结果表明，所提出的控制策略可以抑制MRPC中的环流改善其的控制性能，有利于MRPC的实际应用。

RPC Circulation Inhibition Strategy Based on MMC

RPC of electrified railway negative sequence and reactive in situ compensation, suitable for comprehensive management of high-speed railway prominent negative sequence harmonic problems, but RPC by limiting device performance to increase its capacity to affect the future development of the RPC. In view of this problem, some scholars put forward a single phase RPC based MMC integrated compensation device (MRPC) to improve the application of the voltage level, which is conducive to the high voltage and high power applications. But the circulation in MRPC increased the system loss, affect the stability of the system, may lead to serious system collapse. To solve this problem, in this paper, the mathematical model of MRPC is deduced in detail; analyzes the mechanism of the circulation; finally put forward a circulation suppression strategy. The simulation results show that the proposed control strategy can restrain the MRPC circulation in the improvement of control performance, is conducive to practical application of MRPC.