共查询到16条相似文献,搜索用时 625 毫秒
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对采用可编程控制器构建稳压器压力水位控制系统进行了研究.利用可编程控制器的功能模块、模块化结构、配置的灵活性和软件控制技术,实现了稳压器压力水位控制系统的功能.通过对实验结果的分析,证明可编程控制器应用于稳压器压力、水位控制是有效的、成功的. 相似文献
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针对AP1000稳压器内部传热传质过程的特点,结合西屋AP1000的相关参数,在上海核工程研究设计院控制系统模型的基础上,对其中稳压器的二区数学模型进行完善和改进,利用acslX软件建立稳压器三区动态数学模型,并严格按照西屋AP1000稳压器的压力控制逻辑,对建立起来的数学模型进行了相应的控制仿真实现。通过比较改进前和改进后模型试验结果与相关设计文件的差异,验证了改进后模型较改进前具有更好的精确性、可扩展性,同时该模型可为今后CAP1400稳压器的仿真工作打下一定基础。 相似文献
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In pressurized water reactor (PWR) nuclear power plants (NPPs) pressure control in the primary loops is fundamental for keeping the reactor in a safety condition and improve the generation process efficiency. The main component responsible for this task is the pressurizer. The pressurizer pressure control system (PPCS) utilizes heaters and spray valves to maintain the pressure within an operating band during steady state conditions, and limits the pressure changes during transient conditions. Relief and safety valves provide overpressure protection for the reactor coolant system (RCS) to ensure system integrity. Various protective reactor trips are generated if the system parameters exceed safe bounds. Historically, a proportional-integral-derivative (PID) controller is used in PWRs to keep the pressure in the set point, during those operation conditions. The purpose of this study is two-fold: first, to develop a pressurizer model based on artificial neural networks (ANNs); secondly, to develop fuzzy controllers for the PWR pressurizer modeled by the ANN and compare their performance with conventional ones. Data from a 2785 MWth Westinghouse 3-loop PWR simulator was used to test both the pressurizer ANN model and the fuzzy controllers. The simulation results show that the pressurizer ANN model responses agree reasonably well with those of the simulated power plant pressurizer, and that the fuzzy controllers have better performance compared with conventional ones. 相似文献
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稳压器是压水堆核动力装置压力安全系统的主要设备,其水位波动反映了一回路系统的水容积变化情况,是稳压器运行控制的关键参数之一。本文基于双区非平衡模型模拟蒸汽泄露条件下的稳压器水位变化,并针对稳压器蒸汽泄漏工况开展了水位测量特性试验研究,研究了2.6~7.8 kPa/s压降速率工况下,稳压器内水位测量压差的变化情况。研究发现:采用压差修正液相区密度计算的水位值在压力瞬变情况下有较好的跟随性,能够更好的反应水位特性;表征稳压器内液相区密度变化的压差在压力减小的过程中,过渡时间小于40 s,且过渡时间与压变速率单因素无强相关性。这为稳压器的安全运行控制提供了基础研究数据。 相似文献
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Yi-Hsiang Cheng Jong-Rong Wang Hao-Tzu Lin Chunkuan Shih 《Nuclear Engineering and Design》2009,239(11):2343-2348
The pressurizer plays an important role in controlling the pressure of the primary coolant system in pressurized water reactor (PWR) nuclear power plants. An accurate modeling of the pressurizer is needed to determine the pressure response of the primary coolant system, and thus to successfully simulate overall PWR nuclear power plant behavior during transients. The purpose of this study is to develop a pressurizer model, and to assess its pressure transients using the TRACE code version 5.0. The benchmark of the pressurizer model was performed by comparing the simulation results with those from the tests at the Maanshan nuclear power plant. Four start-up tests of the Maanshan nuclear power plant are collected and simulated: (1) turbine trip test from 100% power (Test PAT-50); (2) large-load reduction at 100% power (Test PAT-49); (3) net-load trip at 100% power (Test PAT-51); and (4) net-load trip at 50% power (Test PAT-21). The simulation results show that the predictions of the pressure response are in reasonable agreement with the power plant's start-up tests, and thus the pressurizer model built in this study is successfully verified and validated. 相似文献
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通过分析相间的传热传质过程以及非凝性气体存在时壁面蒸汽冷凝过程,建立了汽 气稳压器模型,研究了非凝性气体对稳压过程的影响,描述了稳压器的稳压特性,并将模型计算结果与MIT稳压器实验数据进行了对比。结果表明:当不含非凝性气体时,计算精度高,相对偏差在0.8%内,压力峰值为0.647 MPa;当非凝性气体含量从0增至20%时,计算精度相对减小,最高相对偏差为15.4%;压力峰值从0.647 MPa增至1.02 MPa。研究表明非凝性气体对稳压器稳压过程具有重要影响作用,随着非凝性气体的种类和含量的变化,稳压器内稳压过程发生显著变化。 相似文献
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稳压器模糊控制系统初步研究 总被引:10,自引:6,他引:4
通过合理地确定模糊集、隶属度函数和模糊控制规则等。初步研究和设计了核电站稳压器的模糊控制器。仿真结果表明,与传统的比例-积分-微分控制器相比,模糊控制器在提高稳压器压力、水位控制系统的动态和稳态性能方面具有明显的优点。 相似文献