分布式电源监控保护装置保护算法.doc
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分布式电源监控保护装置保护算法,摘 要分布式发电(distributed generation)并不是一种全新的发电技术，在电能取代水力、蒸汽、燃煤成为能量驱动负载以前，绝大多数电能都是分布在需要能源的设备附近。随着生产方式的集中发电、输送方式的远距离输电与分配方式的大电网互联的电力系统成为当今世界上百分之九十的电力供应，其暴露的问题也在不断增加，...
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摘 要
分布式发电(Distributed Generation)并不是一种全新的发电技术，在电能取代水力、蒸汽、燃煤成为能量驱动负载以前，绝大多数电能都是分布在需要能源的设备附近。随着生产方式的集中发电、输送方式的远距离输电与分配方式的大电网互联的电力系统成为当今世界上百分之九十的电力供应，其暴露的问题也在不断增加，分布式电源与大电网并联运行需求成为21世纪电力工业的发展方向，但含分布式电源的配电网的保护要与以往的保护有很大的差别，本文针对分布式电源并网后对主网保护的影响而设计一种微机型后备保护装置。
论文首先分析了分布式电源的并网对传统电网的继电保护的影响，建立了分布式电源的并网模型，通过对并网模型的分析及继电保护的相关知识，选取分布式电源并网保护的功能及整定值的设定，设计提出了一种基于ARM的嵌入式微机型的分布式电源监控保护装置。
接下来简要介绍了一下分布式电源监控保护装置的硬件平台，在基于LPC2468的最小系统上设计交流采样电路、开关量输入输出电路、频率测量电路。
论文的重点在于各种电网电气量的计算方法，保护算法的目的是从离散的采样值中计算出有用的信号，为保护逻辑判决提供准确而实时的依据。保护算法有很多种，本文提出的分布式电源保护装置的算法有：基于同期并网的相位检测算法，基于突变量的元件启动算法，电流电压序分量的计算方法，各种谐波分量的检测算法及基本电气量的检测算法。所有算法所设定的信号模型都不一样，大致可以分为正弦信号模型、周期信号模型与随机信号模型，从时间窗、精度、计算量及速度等方面对每种算法的优劣性作了分析。
最后把嵌入式操作系统uC/OS-II成功移植到LPC2468硬件平台上，建立了多任务设计环境，保护装置的每个功能都被分配到一个任务，且各任务都有不同的优先级，定时采样中断任务、保护算法任务及故障处理任务是其中最主要的部分，各个任务相互协调完成了从并网投入、检测监控、保护切除的一系列工作。
分布式电源监控保护装置是继电保护领域一个全新的课题，其主要功能还是在于检测并网点两侧的信号来设定后备保护，用以辅助分布式电源内部保护及主网保护设备，随着分布式电源的大范围并网，其应用空间无限宽广。
关键字 分布式电源；保护参数；保护算法；uC/OS-II；多任务设计
Abstract
Distributed Generation (DG) is not a new power generation technology, before the electricity as energy to drive the load replace the water, steam, coal-fired energy , the vast majority of electricity is distributed in the near the equipment which needed energy. As the power system which with the concentration of power production, long-distance of power transmission and large grid interconnection of power distribution mode to be the 90 percent of the electricity supply in the world. The problems are also growing. With large distributed power grid parallel operation to become the development direction of the electric power industry in 21st century. However, distributed power protection is different from traditional relay protection. This paper focuses on the main impact of power protection after the distributed power grid to design a microprocessor-based back-up protection device.
Paper first analyzes the grid of distributed power to influence of the traditional grid relay protection, establish the distributed power grid model, and through analysis the grid model and the relevant knowledge of relay, design the distributed power gird protection function and setting the value of protection. Based ARM embedded to design a microprocessor-based distributed power monitoring and protection devices.
Then a brief introduction about the protection of distributed power protection hardware design, based on the minimum system of LPC2468 to design the AC sampling circuit, switch input and output circuits, frequency measurement circuit.
Paper focuses on various methods of calculating the amount of electrical power, the purpose of protect the algorithm is to calculate the useful signal from the discrete sample values, provide accurate and real-time data to the logical decision for the protection. There are many protection algorithms, the proposed algorithm for distributed power protection devices are: the phase detection algorithm based on the synchronizing grid, the components starting algorithm based on mutation, the calculation method of the current and voltage sequence component, the detection algorithms of harmonic components and the detection algorithm of basic electrical quantities. All the algorithms are not based the same signal model that can be divided into sinusoidal signal model, random periodic signal model and signal model. In terms of the time window, accuracy, speed and computation to analyze advantages and disadvantages of each algorithm.
Finally, embedded operating system uC/OS-II successfully transplanted to the LPC2468 hardware platform, then based on which to establish a multi-task design, each functional unit is assigned to a task, time sampling interrupt task, the protection algorithm task and the fault processing task are the most important part, and all the tasks coordinate to finish a series of works that grid connection, inspection and monitoring, fault cleaning.
Distributed power monitoring and protection device is a new subject area, its main function lies on signal detected of the both sides and to design the b..
分布式发电(Distributed Generation)并不是一种全新的发电技术，在电能取代水力、蒸汽、燃煤成为能量驱动负载以前，绝大多数电能都是分布在需要能源的设备附近。随着生产方式的集中发电、输送方式的远距离输电与分配方式的大电网互联的电力系统成为当今世界上百分之九十的电力供应，其暴露的问题也在不断增加，分布式电源与大电网并联运行需求成为21世纪电力工业的发展方向，但含分布式电源的配电网的保护要与以往的保护有很大的差别，本文针对分布式电源并网后对主网保护的影响而设计一种微机型后备保护装置。
论文首先分析了分布式电源的并网对传统电网的继电保护的影响，建立了分布式电源的并网模型，通过对并网模型的分析及继电保护的相关知识，选取分布式电源并网保护的功能及整定值的设定，设计提出了一种基于ARM的嵌入式微机型的分布式电源监控保护装置。
接下来简要介绍了一下分布式电源监控保护装置的硬件平台，在基于LPC2468的最小系统上设计交流采样电路、开关量输入输出电路、频率测量电路。
论文的重点在于各种电网电气量的计算方法，保护算法的目的是从离散的采样值中计算出有用的信号，为保护逻辑判决提供准确而实时的依据。保护算法有很多种，本文提出的分布式电源保护装置的算法有：基于同期并网的相位检测算法，基于突变量的元件启动算法，电流电压序分量的计算方法，各种谐波分量的检测算法及基本电气量的检测算法。所有算法所设定的信号模型都不一样，大致可以分为正弦信号模型、周期信号模型与随机信号模型，从时间窗、精度、计算量及速度等方面对每种算法的优劣性作了分析。
最后把嵌入式操作系统uC/OS-II成功移植到LPC2468硬件平台上，建立了多任务设计环境，保护装置的每个功能都被分配到一个任务，且各任务都有不同的优先级，定时采样中断任务、保护算法任务及故障处理任务是其中最主要的部分，各个任务相互协调完成了从并网投入、检测监控、保护切除的一系列工作。
分布式电源监控保护装置是继电保护领域一个全新的课题，其主要功能还是在于检测并网点两侧的信号来设定后备保护，用以辅助分布式电源内部保护及主网保护设备，随着分布式电源的大范围并网，其应用空间无限宽广。
关键字 分布式电源；保护参数；保护算法；uC/OS-II；多任务设计
Abstract
Distributed Generation (DG) is not a new power generation technology, before the electricity as energy to drive the load replace the water, steam, coal-fired energy , the vast majority of electricity is distributed in the near the equipment which needed energy. As the power system which with the concentration of power production, long-distance of power transmission and large grid interconnection of power distribution mode to be the 90 percent of the electricity supply in the world. The problems are also growing. With large distributed power grid parallel operation to become the development direction of the electric power industry in 21st century. However, distributed power protection is different from traditional relay protection. This paper focuses on the main impact of power protection after the distributed power grid to design a microprocessor-based back-up protection device.
Paper first analyzes the grid of distributed power to influence of the traditional grid relay protection, establish the distributed power grid model, and through analysis the grid model and the relevant knowledge of relay, design the distributed power gird protection function and setting the value of protection. Based ARM embedded to design a microprocessor-based distributed power monitoring and protection devices.
Then a brief introduction about the protection of distributed power protection hardware design, based on the minimum system of LPC2468 to design the AC sampling circuit, switch input and output circuits, frequency measurement circuit.
Paper focuses on various methods of calculating the amount of electrical power, the purpose of protect the algorithm is to calculate the useful signal from the discrete sample values, provide accurate and real-time data to the logical decision for the protection. There are many protection algorithms, the proposed algorithm for distributed power protection devices are: the phase detection algorithm based on the synchronizing grid, the components starting algorithm based on mutation, the calculation method of the current and voltage sequence component, the detection algorithms of harmonic components and the detection algorithm of basic electrical quantities. All the algorithms are not based the same signal model that can be divided into sinusoidal signal model, random periodic signal model and signal model. In terms of the time window, accuracy, speed and computation to analyze advantages and disadvantages of each algorithm.
Finally, embedded operating system uC/OS-II successfully transplanted to the LPC2468 hardware platform, then based on which to establish a multi-task design, each functional unit is assigned to a task, time sampling interrupt task, the protection algorithm task and the fault processing task are the most important part, and all the tasks coordinate to finish a series of works that grid connection, inspection and monitoring, fault cleaning.
Distributed power monitoring and protection device is a new subject area, its main function lies on signal detected of the both sides and to design the b..
