摘要
我国交直流电力系统的日益扩大与复杂化对暂态稳定仿真的速度与精度提出了更高的要求。为此,提出了一种基于图形处理器(Graphics Processing Unit,GPU)计算平台的暂态稳定双层并行算法。第一层为'交-直并行',考虑直流系统动态的独立性,将交流系统与直流系统解耦,分别部署在CPU和GPU上计算。第二层为'直流系统时间并行',直流系统在小步长下采用详细模型仿真,进一步在时间并行算法的框架下,使用GPU模拟实现了流水线计算,可灵活设置流水线条数,对多个直流系统多积分时步并行求解。最后,使用2个算例验证了该算法的有效性与实用性。计算结果表明:该算法可有效提高计算速度,为交直流系统稳定分析提供了新的解决思路。
The expansion and complexity of AC/DC power system in China put forward higher request on the speed and accuracy of transient stability simulation. A two-level parallel algorithm based on GPU platform for the transient stability simulation of AC/DC power system is presented. The first level is AC-DC parallel. Considering the dynamic independency of DC power system, AC/DC power system is decomposed into two parts： the computation of AC power system is deployed on CPU, and HVDC is deployed on GPU. The second parallel level focuses on HVDC. In this paper, DC system adopts detailed model for simulation under small step. Based on the principle of parallel-in-time method, the pipeline technique is implemented on GPU, which can set the numbers of pipeline and makes multi-integration steps of HVDC solved simultaneously. In the end, two examples are applied to verify the efficiency and practical applicability of the proposed method. Calculation results show that the proposed algorithm can enhance the calculation speed, supplying a novel approach for AC/DC system stability analysis.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第21期102-108,共7页
Power System Protection and Control
基金
国家863高技术基金项目(2011AA05A118)
国家自然科学基金项目(50977082)
supported by National High Technology Research and Development of China(863 Program)(No.2011AA05A118)
National Natural Science Foundation of China(No.50977082)
New Century Excellent Talents in University(NCET-08-0489)
