共查询到18条相似文献,搜索用时 761 毫秒
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孤网模式下,水电机组调速系统的参数设置不合理会造成频率振荡,从而影响电网可靠运行,因此有必要对调速系统参数与孤网频率稳定性之间的关系进行研究。为此,针对孤网运行的西南某水电机组的实际情况建立了孤网系统模型,并成功仿真出真实存在的频率振荡现象。在此基础上,通过深入分析调速系统人工频率死区、永态转差系数和控制参数对孤网频率稳定性的影响,提出了参数配置建议,并用PSD BPA软件进行了验证。结果表明,合理配置调速系统参数能显著提高水电机组对孤网频率的控制能力,增强孤网系统的稳定性。 相似文献
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超临界机组汽轮机调速系统模型参数确定的新方法 总被引:1,自引:0,他引:1
汽轮机调速系统模型参数的确定,对各种热力发电机组的仿真,控制系统的设计及电力系统动态研究具有重大意义.通过蒸汽发电机组有效热平衡数据计算出汽轮机模型参数,得出各种不同工况下参数的变化规律,比实测法更方便简捷实用.对600MW超临界机组汽轮机调速系统的模型参数进行分析计算,并用该模型针对特殊的阶跃响应作出仿真和分析. 相似文献
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基于果蝇优化算法的汽轮机调节系统参数辨识 总被引:1,自引:0,他引:1
《动力工程学报》2015,(7):556-561
为了建立用于电力系统稳定计算的汽轮机调节系统的准确模型,通过现场试验的方法得到某电厂试验数据并进行了相关预处理,采用果蝇优化算法对该电厂汽轮机调节系统各环节的参数进行辨识,最后对辨识结果进行仿真校核,给出仿真曲线与实测曲线的对比结果,并计算出各误差指标.结果表明:所采用的果蝇优化算法适用于汽轮机调节系统参数辨识,经过仿真校核得到的模型与机组实际特性趋于一致,验证了该方法的实用有效性. 相似文献
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水轮机调速器是水电厂重要控制设备,其工作的稳定性直接关系到水轮发电机组乃至电力系统的安全稳定运行。应用现代故障诊断技术,提出了一种基于状态观测器的故障检测与诊断方法,以实现调速器液压系统的故障检测。通过仿真验证了这种方法依然具有较好的故障检测和诊断能力。 相似文献
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水轮机调速器接力器响应时间常数测试方法研究 总被引:1,自引:0,他引:1
为给水轮机调速器模型仿真提供准确的液压随动系统接力器响应时间常数,分析了现行国家和电力行业标准中提供的测试方法,根据接力器响应时间常数的定义,结合贴近机械液压随动系统实际的测试原理仿真,提出了一种步骤简单且易于实施的测试方法,并实测得到某水轮机调速器机械液压随动系统的接力器响应时间常数,结合该机械液压随动系统的模型进行了仿真,得到的接力器最快开启和关闭过程以及一次调频动作后的响应过程均与实测结果一致,表明该测试方法正确、可行。 相似文献
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Ying Li Chufeng Peng Zenghui Yang 《Frontiers of Energy and Power Engineering in China》2009,3(2):198-203
The theoretical modeling, parameters test and model correction for a steam turbine (ST) governor are discussed. A set of ST
Governor system model for power system simulation is created based on this research. A power system simulation for an actual
power grid accident is conducted using this new model and the comparison between the simulation and actual data show that
the results are satisfactory. 相似文献
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A new generation of real-time digital simulator of the turbine-alternator-grid system (STAR) has been developed by ENEL-R and D-CRA in order to meet the demands of design review, commissioning test, preliminary assessment and final fine-tuning of excitation systems and voltage regulators, as well as of turbine actuators and speed governors. In particular, the electromechanical behavior of the overall turbine-alternator system, with respect to the electrical interconnected grid, may be theoretically studied, by using dynamic simulation models perfected with suitable details. The control systems performances can also be easily checked and fine-tuned, in presence of small and large perturbations, both in normal and in emergency operating conditions. The simulator STAR, which has been successfully used also for the specialists training, can be effectively considered as a real turbine-alternator system. In fact its inputs may be directly connected to the interfaces of the excitation system and turbine governor; moreover, the simulator provides in output the process variables with the suitable format requested by the different control apparatuses. The paper describes the main design topics of the STAR simulator, as mainly regards its hardware and software architecture and the model framework of the turbine (steam, hydro or gas), alternator (with static and rotating exciter) and grid interconnection. The structure of the excitation control system and turbine speed governor, as well as the parameters configuration, run-time simulation, and data visualization procedures are shortly described. Finally, the STAR performances are shown through significant transient responses 相似文献
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提出了一种基于参数的水轮机调节系统状态监测和故障诊断方法,并设计了基于BP人工神经网络的实现模型,对该方法中用到的数据处理技术做了深入研究,为水轮机调节系统的状态监测和故障诊断研究提供了一种新思路。 相似文献