适用于网源协调的发电机组涉网保护的自动校核

发布时间：2018-09-05 09:47

【摘要】：随着电力体制改革,厂网分开,发电侧独立性和自由性大为增加。由于现场人员工作任务较重或理论水平欠缺,控制系统的控制方式和参数的选择与设置主要由调试单位和控制系统生产厂家的研究人员依据设备参数、参考规程推荐值自行整定,有的甚至使用基建部门的调试定值。此外,电网调控运行工作人员很少参与保护定值的整定;而参数选择和设置人员又不明确电网的安全运行对发电机组的要求,将保障发电机组自身的安全作为唯一的目标,并且缺乏考虑在不同的运行方式下并列运行的机组保护动作特性对电力系统安全与稳定的影响。因此,在电力系统日常生产中,网源协调问题受到越来越多的关注。为进一步加强电网与机组运行的协调控制和管理,本文提供了一种大规模电力系统稳定仿真中发电机组涉网保护自动校核的方法,基于电网拓扑、基础潮流、动态元件参数和涉网保护定值,自动生成涉网保护和限制模型,并根据不同的运行方式自动形成故障集,自动实现发电机组涉网保护和限制的配合关系静态校核以及时域仿真动态校核,并给出相应的校核结果。较好地解决了现有电力系统稳定仿真程序中缺少发电机组涉网保护和限制自动校核功能的问题,确保机组涉网保护能够适应电网运行方式的变化,与自动装置达到最佳配合;并在保证机组安全的基础上,充分发挥其动态调节能力,为电网的安全稳定运行提供有力支撑。
[Abstract]:With the reform of power system, the independence and freedom of power generation side are greatly increased. Because of the heavy work tasks or the lack of theoretical level, the selection and setting of control mode and parameters of the control system are mainly based on the equipment parameters by the researchers of the debugging units and the manufacturers of the control system. Reference procedures recommend the value of self-tuning, and some even use the debug value of the capital construction department. In addition, the regulation and operation staff rarely participate in the setting of the protection setting, and the parameter selection and setup personnel are not clear about the requirements of the grid safety operation on the generator set, and the only goal is to ensure the safety of the generator set itself. And there is a lack of considering the influence of unit protection characteristics on the safety and stability of power system under different operation modes. Therefore, in the daily production of power system, network source coordination has attracted more and more attention. In order to further strengthen the coordinated control and management of power network and unit operation, this paper provides a method for automatic checking of generator unit network protection in large-scale power system stability simulation, which is based on the topology of power network and the basic power flow. Dynamic component parameters and network protection settings are automatically generated, and fault sets are automatically formed according to different operation modes. The coordination relation between protection and limitation of the generator is realized automatically, and the dynamic verification in time domain simulation is also given. The corresponding results are given. The problem of lack of network protection and limitation of automatic checking function in the existing power system stability simulation program is well solved, so as to ensure that the unit network protection can adapt to the change of power grid operation mode and achieve the best cooperation with the automatic device. On the basis of ensuring the safety of the unit, it can give full play to its dynamic regulating ability and provide a strong support for the safe and stable operation of the power grid.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM31

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