共查询到18条相似文献,搜索用时 187 毫秒
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针对目前电力系统机电暂态仿真与电磁暂态仿真各自相对独立的现状,从电力系统机电暂态/电磁暂态转换仿真的需求出发,提出并编程实现了一种基于PSS/E和EMTP软件的电力系统机电/电磁暂态仿真转换系统,该系统可以直接将机电暂态仿真数据转换为电磁暂态仿真数据,为机电暂态与电磁暂态两种原本相对独立的仿真搭起了桥梁。并以实际上海电网为例,结果表明该系统能准确地实现电力系统机电暂态仿真到电磁暂态仿真数据的成功转换。 相似文献
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电力系统机电暂态和电磁暂态数字混合仿真 总被引:1,自引:1,他引:0
石访 《电网与水力发电进展》2009,25(12):42-46
简要介绍了混合仿真的基本原理.对国内外研究状况进行综述,从工程应用角度对混合仿真涉及的关键技术进行分析和评价,并就混合仿真软件开发过程中需注意的若干事项进行讨论。最后指出,基于成熟的机电暂态和电磁暂态软件开发离线混合仿真程序具有广阔的前景和工程应用价值。 相似文献
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随着大规模电力电子设备的并网,传统电网的建模方式已经不能完全适用于现代大规模交直流混合系统。为满足现代交直流混合系统暂态特性分析的需要,提出了建立含VSC-HVDC交直流混合系统多时间尺度暂态模型。VSC-HVDC系统控制器采用矢量控制,内环控制采用基于α-β静止坐标系的建模方式,该建模方式解决了传统d-q旋转坐标系下不能完全解耦的问题。在ETSDAC/PSASP仿真平台上建立了机电-电磁暂态模型,同时在MATLAB/Simulink平台上建立了电磁暂态模型,针对不同类型的直流短路故障,分别在两种模型上进行暂态特性仿真分析。结果显示,在暂态特性上机电-电磁暂态模型比电磁暂态模型更加精确。 相似文献
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研究了简化的电磁暂态电力电子器件应用于机电暂态仿真的可行性。使用MATLAB-SIMULINK的相量算法,将电网中电流电压视为相量,采用滤去直流与谐波分量的隐式梯形法求解相量方程。在相量算法下搭建静止同步补偿装置(STATCOM)模型,对其电流和电压相量进行dq分解,采用PI和前馈解耦控制,通过对风电机组正常情况下的无功补偿以及短路故障下低电压穿越能力的无功支持来验证这种方法的可行性。仿真结果表明,在相量算法下,STATCOM具有快速无功调节的能力,从而验证了简化电磁暂态的STATCOM应用于机电暂态仿真的可行性,也体现出相量算法在大规模电力系统仿真中的精确性和快速性。 相似文献
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介绍了一种电力系统电磁暂态仿真非线性元件算法。针对在电力系统电磁暂态领域广泛应用的EMTP(电磁暂态程序)和EMTDC(直流电磁暂态程序)技术存在一定的局限性,在此技术基础上提出了一种新的算法,并对非线性元件二极管进行算例证明。新算法为所有非线性元件提供了一种真非线性元件算法,解决了补偿法求解过程中遇到的假非线性元件精度低和拓扑约束的问题,即可求解任意拓扑结构的非线性网络。 相似文献
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《全球能源互联网(英文)》2019,2(1):7-18
As the proportion of renewable energy increases, the interaction between renewable energy devices and the grid continues to enhance. Therefore, the renewable energy dynamic test in a power system has become more and more important. Traditional dynamic simulation systems and digital-analog hybrid simulation systems are difficult to compromise on the economy, flexibility and accuracy. A multi-time scale test system of doubly fed induction generator based on FPGA + CPU heterogeneous calculation is proposed in this paper. The proposed test system is based on the ADPSS simulation platform. The power circuit part of the test system is setup up using the EMT (electromagnetic transient simulation) simulation, and the control part uses the actual physical devices. In order to realize the close-loop testing for the physical devices, the power circuit must be simulated in real-time. This paper proposes a multi-time scale simulation algorithm, in which the decoupling component divides the power circuit into a large time scale system and a small time scale system in order to reduce computing effort. This paper also proposes the FPGA + CPU heterogeneous computing architecture for implementing this multitime scale simulation. In FPGA, there is a complete small time-scale EMT engine, which support the flexibly circuit modeling with any topology. Finally, the test system is connected to an DFIG controller based on Labview to verify the feasibility of the test system. 相似文献
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为研究风气互补发电系统对电网的影响,首先搭建了由风电机组、燃气轮机、电网线路、静止无功补偿器、电力系统稳定器和大型水力发电机组成的仿真系统,并对该系统的负载侧和电网线路中部节点进行了稳定性分析。仿真结果表明,电网在加载了风气互补系统后运行能保持稳定,并能在发生短时故障后恢复到原来状态。该文为进一步研究风气互补系统与电网的相互影响提供了良好的模型基础。 相似文献
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《全球能源互联网(英文)》2018,1(5):627-635
In recent years, a large number of high voltage direct current (HVDC) transmission projects have been connected to AC systems. This has started to have an impact on AC/DC hybrid power grids, particularly receiving terminal power grids. An HVDC system is a large-scale power electronic integrated nonlinear system, and it includes a primary system and a control and protection system. Hence, the precision and degree of detail of HVDC systems directly affect the actual effect of simulation. In recent years, in the case of the normal operation and failure of AC power grids, the abnormal fluctuation and even locking of HVDC systems caused by the inappropriate strategies of the control and protection system component have strongly affected power grids. This has significantly affected the safety and stability of receiving power grids and normal operation. In this study, the actual engineering HVDC control logic provided by a manufacturer is analyzed and simulated based on the user defined component library of the ADPSS electromagnetic transient calculation program, and an HVDC control model based on an actual system is established. The accuracy of the DC control custom model based on ADPSS is verified through the simulation of an actual power grid. 相似文献
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在电力系统暂态安全定量分析软件平台FASTEST(Fast Analysis of Stability using the Extended equal areacriterion and Simulation Technologies)上以研究规模化光伏电站接入系统后的稳定性分析为目的,建立了一个完整而且适合系统安全稳定分析的并网光伏电站机电暂态模型。基于FASTEST特有的暂态稳定量化分析功能,对并网光伏电站被浮云遮挡和系统侧发生扰动这2种典型情况进行仿真分析,从对系统暂态功角稳定性、暂态电压稳定性和暂态频率稳定性的影响的角度,探讨光伏电站与常规电源在影响电网运行特性方面的区别。结果表明,光伏电站并网后对系统暂态频率稳定性影响最为严重,相比较于带有励磁和调速系统的同步发电机,光伏电站在网侧故障时的暂态响应特性更为剧烈。 相似文献
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Modeling and simulation of a grid-connected PV generation system for electromagnetic transient analysis 总被引:9,自引:0,他引:9
This paper addresses modeling and simulation of a grid-connected photovoltaic system (GCPS) to analyze its grid interface behavior and control performance in the system design. A simple circuit model of the solar array is used to easily simulate its inherent characteristics with the basic specification data. Detailed power and protection control of the GCPS as well as its electrical circuits have been represented by user-defined and built-in components to take into account transients in normal and fault conditions, which are dominated by its power electronic controller. The model has been described with the reference to and implemented in PSCAD/EMTDC, a power system transient software package. Extensive simulation results are presented and analyzed to validate that the proposed simulation model is effective for control and protection performance evaluation of the GCPS in terms of electromagnetic transient analysis. 相似文献