电力系统频率动态特性与一次调频控制
发布时间：2019-07-02 14:31
【摘要】：本文旨在对电力系统的频率动态特性和一次调频控制对系统的安全稳定运行的影响问题进行深入的研究分析,使得复杂电力系统中的一次调频容量得到合理的配置和不同类型发电机组的一次调频容量得到合理的分配,更好的为系统改善供电质量。 本文首先介绍电力系统的频率特性,着重分析电力系统中的静态频率特性和动态频率特性,对频率的动态变化过程进行仿真计算,分析简单电力系统中频率动态变化的影响因素；然后介绍电力系统的一次调频原理和系统动态模型的各元件的分析模型,对不同类型的发电机组参与系统频率一次调节特性进行研究分析；最后根据不同类型的发电机组建立多机系统的一次调频模型,对多机系统的一次调频模型进行一次调频容量进行优化和仿真,得到合理的一次调频容量优化分配策略,分析不同类型发电机组在参与频率一次调节过程中的优点和缺点,总结出多机系统的一次调频的特性。 单机系统的频率动态变化过程是假设在发电机组之间的联系是紧密的基础上来分析的,通过推导其单机模型的频率动态变化的公式可以获得其动态频率变化曲线是一条固定时间常数衰减的指数曲线。多机系统的频率动态变化过程主要表现为系统产生不平衡功率时,各个不同地理位置的节点频率会因为扰动和各在线机组的调节发生一个不同的动态变化过程。简单的电力系统是通过迭代计算得到频率的动态变化曲线,得到的仿真曲线再进行简单电力系统有功功率缺额的大小、负荷频率特性、系统惯性时间常数等对系统频率动态变化过程的影响分析。 不同类型发电机组参与系统频率的一次调频特性分析,主要是在介绍系统一次调频原理及作用的情况下,根据系统中的发电机、调速系统、负荷和网络结构等系统元件推导的模型,利用Matlab的动态仿真平台构建三九节点的系统进行分析研究,区别火电机组和水电机组参与系统频率一次调节的前提下,对涉及不同节点、不同容量规模和不同运行方式下的频率一次调节动态响应过程进行仿真分析。 考虑不同类型发电机组参与系统频率一次调频容量优化问题可以描述为：在给定系统最大发电失去量和系统总的一次调频容量的条件下,在满足系统运行约束的情况下,通过改进粒子群优化算法对一次调频容量在各机组间的分配进行优化,从而使整个系统的频率变化过程的调频综合性能指标最优。另一方面通过多机系统的一次调频模型的仿真,给定频率偏差的情况下对系统的最大承受负荷扰动的能力进行对比分析及其合理的一次调频容量配置优化。 复杂电力系统中有必要分析多种类的发电机组参与电网频率一次调节的特性,同时合理的协调各发电机组参与系统频率一次调节的一次调频容量对于提高电力系统频率安全稳定运行成为了关键性问题,合理的优化一次调频容量分配及其配置不但能够减少系统能源的损失,而且能够更好的改善电能质量,提高整个系统的安全稳定。
[Abstract]:The purpose of this paper is to carry out in-depth research and analysis on the frequency dynamic characteristics of power system and the influence of primary frequency modulation control on the safe and stable operation of the system. So that the primary frequency modulation capacity in the complex power system is reasonably distributed and the primary frequency modulation capacity of different types of generating sets is reasonably distributed, and the power supply quality is better improved for the system. In this paper, the frequency characteristic of the power system is introduced, the static frequency characteristic and the dynamic frequency characteristic in the power system are analyzed, the dynamic process of the frequency is simulated and calculated, and the influence of the dynamic change of the frequency in the simple power system is analyzed. In this paper, the primary frequency modulation principle of the power system and the analytical model of each element of the system dynamic model are introduced, the frequency of the system frequency is analyzed and analyzed for different types of generator sets, and the primary frequency modulation mode of the multi-machine system is finally set up according to different types of generator sets. The primary frequency modulation capacity of a multi-machine system is optimized and simulated, and a reasonable one-time frequency modulation capacity optimization distribution strategy is obtained, and the advantages and disadvantages of different types of generating sets in the one-time adjustment process of the participating frequency are analyzed. Point, summarize the frequency modulation of the multi-machine system. The frequency change process of the single-machine system is based on the assumption that the relation between the generator sets is closely related, and the dynamic frequency change curve of the single-machine system can be obtained by deriving the formula of the frequency change of the single-machine model, which is the finger of the fixed time constant attenuation. The frequency dynamic change process of the multi-machine system mainly shows that when the system generates unbalanced power, the node frequency of each different geographical position can be changed by a different dynamic change due to the disturbance and the regulation of each on-line unit The simple power system is to calculate the dynamic change curve of the frequency by the iterative calculation, the obtained simulation curve can be used for simple power system active power shortage, the load frequency characteristic, the system inertia time constant and the like to the system frequency dynamic change process In response to the analysis, the primary frequency modulation characteristics of the system frequency of different types of generator sets are analyzed, and the system components such as the generator, the speed governing system, the load and the network structure in the system are mainly introduced in the case of the primary frequency modulation principle and the function of the system. The model is derived, and the system of the three-nine nodes is constructed by the dynamic simulation platform of Matlab. and the frequency of different nodes, different capacity scales and different operating modes can be adjusted in a dynamic response process at one time, The simulation and analysis of the frequency primary frequency modulation capacity of different types of generator sets can be described as follows: under the condition of the maximum power generation loss of the given system and the total primary frequency modulation capacity of the system, the system can be used to meet the system transportation. by improving the particle swarm optimization algorithm, the distribution of the primary frequency modulation capacity among the units is optimized by improving the particle swarm optimization algorithm, so that the frequency modulation heddle of the frequency change process of the whole system The performance index is the best. On the other hand, by the simulation of the one-time frequency modulation model of the multi-machine system, the ability of the maximum load disturbance of the system under the condition of the given frequency deviation is compared and analyzed and the reasonable one-time adjustment The frequency capacity configuration is optimized. It is necessary to analyze the characteristics of multi-type generator set in the frequency of the power grid at one time in the complex power system. At the same time, it is reasonable to coordinate the primary frequency modulation capacity of each generator set in the frequency adjustment of the system, so as to improve the frequency safety and stability of the power system The line becomes a key problem, and the reasonable optimization of the primary frequency modulation capacity allocation and the configuration can not only reduce the loss of the energy of the system, but also can better improve the electric energy quality and improve the electric energy quality,
【学位授予单位】：广东工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM712
本文编号：2509009
[Abstract]:The purpose of this paper is to carry out in-depth research and analysis on the frequency dynamic characteristics of power system and the influence of primary frequency modulation control on the safe and stable operation of the system. So that the primary frequency modulation capacity in the complex power system is reasonably distributed and the primary frequency modulation capacity of different types of generating sets is reasonably distributed, and the power supply quality is better improved for the system. In this paper, the frequency characteristic of the power system is introduced, the static frequency characteristic and the dynamic frequency characteristic in the power system are analyzed, the dynamic process of the frequency is simulated and calculated, and the influence of the dynamic change of the frequency in the simple power system is analyzed. In this paper, the primary frequency modulation principle of the power system and the analytical model of each element of the system dynamic model are introduced, the frequency of the system frequency is analyzed and analyzed for different types of generator sets, and the primary frequency modulation mode of the multi-machine system is finally set up according to different types of generator sets. The primary frequency modulation capacity of a multi-machine system is optimized and simulated, and a reasonable one-time frequency modulation capacity optimization distribution strategy is obtained, and the advantages and disadvantages of different types of generating sets in the one-time adjustment process of the participating frequency are analyzed. Point, summarize the frequency modulation of the multi-machine system. The frequency change process of the single-machine system is based on the assumption that the relation between the generator sets is closely related, and the dynamic frequency change curve of the single-machine system can be obtained by deriving the formula of the frequency change of the single-machine model, which is the finger of the fixed time constant attenuation. The frequency dynamic change process of the multi-machine system mainly shows that when the system generates unbalanced power, the node frequency of each different geographical position can be changed by a different dynamic change due to the disturbance and the regulation of each on-line unit The simple power system is to calculate the dynamic change curve of the frequency by the iterative calculation, the obtained simulation curve can be used for simple power system active power shortage, the load frequency characteristic, the system inertia time constant and the like to the system frequency dynamic change process In response to the analysis, the primary frequency modulation characteristics of the system frequency of different types of generator sets are analyzed, and the system components such as the generator, the speed governing system, the load and the network structure in the system are mainly introduced in the case of the primary frequency modulation principle and the function of the system. The model is derived, and the system of the three-nine nodes is constructed by the dynamic simulation platform of Matlab. and the frequency of different nodes, different capacity scales and different operating modes can be adjusted in a dynamic response process at one time, The simulation and analysis of the frequency primary frequency modulation capacity of different types of generator sets can be described as follows: under the condition of the maximum power generation loss of the given system and the total primary frequency modulation capacity of the system, the system can be used to meet the system transportation. by improving the particle swarm optimization algorithm, the distribution of the primary frequency modulation capacity among the units is optimized by improving the particle swarm optimization algorithm, so that the frequency modulation heddle of the frequency change process of the whole system The performance index is the best. On the other hand, by the simulation of the one-time frequency modulation model of the multi-machine system, the ability of the maximum load disturbance of the system under the condition of the given frequency deviation is compared and analyzed and the reasonable one-time adjustment The frequency capacity configuration is optimized. It is necessary to analyze the characteristics of multi-type generator set in the frequency of the power grid at one time in the complex power system. At the same time, it is reasonable to coordinate the primary frequency modulation capacity of each generator set in the frequency adjustment of the system, so as to improve the frequency safety and stability of the power system The line becomes a key problem, and the reasonable optimization of the primary frequency modulation capacity allocation and the configuration can not only reduce the loss of the energy of the system, but also can better improve the electric energy quality and improve the electric energy quality,
【学位授予单位】：广东工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM712
【引证文献】
相关期刊论文 前3条
1 陶骞;陈琼琼;崔一铂;陈文;游力;;基于粒子群算法的一次调频参数优化研究[J];贵州电力技术;2015年12期
2 马晓光;;煤矸石电厂一次调频系统优化及应用分析[J];科技创新导报;2015年29期
3 邓奇超;刘尚明;孙晖;;燃气轮机神经网络前馈控制对一次调频的影响[J];热力透平;2015年02期
相关硕士学位论文 前2条
1 陈晓梅;发电机组频率特性分析与机网协调策略研究[D];华南理工大学;2015年
2 罗宏健;虚拟同步发电机特性的能量型储能系统控制策略研究[D];电子科技大学;2015年
，本文编号：2509009
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