The Effect of Transient Under-voltage Load Shedding Characteristic on Power System Simulation
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摘要: 电力系统暂态稳定性是评估电力系统稳定性的重要方面,它的可信度很大程度上决定了电力系统规划、运行的有效性和合理性。目前,电力系统暂态稳定仿真可信度提高的瓶颈在于负荷模型,虽然近年来出现了许多新型实用的负荷模型,但负荷的一些固有特性,尤其是暂态低压减载特性并没有在暂态稳定仿真当中得以体现。为验证暂态低压载特性对暂态稳定仿真的影响,本文以CEPRI-36节点系统为例,比较了不同负荷模型在发生暂态低压减载和未发生暂态低压减载情形下对暂态稳定仿真结果的影响,结果表明负荷的暂态低压减载特性和负荷模型一样都对仿真结果有着很大的影响,这种特性应该在暂态稳定仿真中加以考虑。Abstract: Transient stability analysis is an important part of power system stability, which highly determines the effectiveness and rationality of power system such as system planning and operating. At present, the bottleneck of improving the reliability of transient stability analysis lies in the load model. Although lots of new practical load models have been presented recently, some characteristics, especially for load shedding under transient voltage sink, has not been considered in transient stability analysis. In order to verify the influence of load shedding characteristic under transient voltage sink in transient stability analysis, with the CEPRI-36 system as example, the influence of different load models under different situations in transient stability simulation are studied. The research shows that the load model and the load shedding characteristic under transient voltage sink both have great effect on simulation results, and this kind of characteristics should be considered in transient stability analysis.
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Keywords:
- transient stability /
- load model /
- load shedding /
- transient voltage sink
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