【作者】 周洪芳；

【导师】 夏成军； 余欣梅；

【作者基本信息】 华南理工大学 ， 电气工程， 2011， 硕士

【摘要】 当今世界环境日益恶化的趋势导致清洁能源的迫切需求,核能发电作为一种无污染能源已经在全世界大力发展起来。随着能源危机的来临以及人们环保意识的提高,核电机组大量的接入电网,核电在电网中所占的比重日益增加。由于台山核电机组是目前世界上单机容量最大的核电机组,其单机容量达1755MW,因此核电站运行特性的研究对电网的安全稳定运行具有至关重要的意义。电网故障或扰动会导致核电机端电压、频率的变化,从而引起核电机组内部参数的波动。核电机组的退出将会导致系统失去大量有功功率,使故障情况进一步恶化。而核电机组对电网的影响主要考虑核电机组的切机、失磁对电网的稳定性和电压、频率的扰动。为了对大扰动下核电机组接入电网后的相互影响进行研究,本文以台山核电机组为研究对象,研究核电机组的数学模型及仿真模型,在此基础上针对不同的故障模式对大型压水堆核电机组的特性进行了仿真研究。研究的结果表明:对于一般形态的故障在快速而正确切除的情况下,核电机组本身不需要采取特殊的措施。但是如果某些保护不正确动作,故障长期存在,则可能导致系统内机组失去同步,必须在机组内采取一些特殊的措施。更多还原

【Abstract】 Today’s trend of deteriorating world environment led to the urgent needs of clean energy, nuclear power generation as a pollution-free energy has been developed vigorously in the world. With the advent of the energy crisis and increasing awareness of environmental protection,a large number of nuclear power units connected to the power grid, the proportion of nuclear power in the grid increases,however the capacity of Taishan nuclear power units is the largest in the world, its capacity is 1755 MW, Which makes the studies on nuclear power plant operating characteristics of critical importance in safe and stable operation of power grid.The Power grid malfunction or disturbance may lead to instability of the terminal voltage of nuclear power units and grid frequency,which may cause the fluctuations in intrinsic parameters of nuclear power generating sets. Also the withdrawal of nuclear Power units will cause the system to lose substantive active Power making the malfunction even worse.In order to investigate the interaction between nuclear power units and power grid under serious disturbance, the paper study the mathematical model and simulation model of Taishan nuclear power units.The characteristics of pressurized water reactor plant are simulated in fault modes.Simulative results show that.it is not necessary to take special measures for normal faults which are removed rapidly and correctly:special measures have to be taken if the fault stays because of the incorrect protection operations,which may cause unit synchronization loss.更多还原