【作者】 李伟；

【导师】 杨以涵； 鲍海；

【作者基本信息】 华北电力大学（北京） ， 电力系统及其自动化， 2007， 博士

【摘要】 依据功率的物理意义,提出一种功率分解的新方法。该方法基于电网功率分量理论,核心描述为在断面潮流已知的多电源网络中,将每个电源的注入功率分解为网络电源的总数个功率分量形式;每个分量描述两个电源间的耦合关系,功率分量间不仅相互独立,并且功率分量的注入与消耗满足功率守恒性质;电网中支路功率为具有不同分布系数的所有功率分量的代数和。由此建立基于网络全局及断面潮流的解析分析理论体系—电网功率分量及其分布机理。通过对比分析将现有一些广泛研究的方法统一到功率分量理论上来,澄清了对功率分解的模糊认识,使得这一问题理论化、系统化。迄今为止叠加定理只是用于电压、电流的计算,没有涉及其物理属性,即每个电源单独作用时其在电路网络中产生的电压、电流数值是否就是所有电源共同作用时由此电源作用产生的电压、电流。叠加定理被认为只是一种数值计算方法,还是其结果就是真实的电压、电流的物理分布?这个问题从现有的文献看还没有人研究过。论文首次提出这个问题并作初步地研究,并以物理实验作为功率分量理论数学证明的有益补充,进一步完善了功率分量理论。在证明功率分量守恒的过程中发现网络导纳阵对称是非常重要并被多次引用的性质,因此提出含受控源的不对称网络功率分量是否正确及表现形式的问题。利用一个简单的并联在节点和地之间的受控电流源进行分析。发现引入受控源后功率分布的数值发生了有规律的变化,进而给出基础功率和附加功率的定义。功率分量在不对称网络中表现为基础功率分量和附加功率分量,二者合成为总的功率分量,且基础功率分量和附加功率分量分别守恒。在电力网络断面潮流已知的前提下,形成电力系统等值网络,利用功率分量的基本理论,对电网功率的分布进行分析,提出一种新的潮流追踪模型与算法。该模型充分利用功率分量理论的优点,将电网分解为几个互相解耦的网络,把每一个电源在功率物理意义的背景下独立出来,充分考虑了电源功率交叉项的分解问题;将系统基本潮流和网络损耗一起追踪,在潮流跟踪过程中实现对系统网损的分摊并考虑了有功无功的耦合这一重要的问题。提出一种新的电流追踪原则:节点功率按由叠加定理所确定电流的共轭比进行分配。更多还原

【Abstract】 According to the physical meanings of power, the dissertation puts forward a novel method to decompose of power in system. Based on the power component theory, core description of the method , under the cross section known flow in power supply network, is that each input power of supply is decomposed into several power components; Each component describes the matched relation of two power supplies, and not only power component is mutually independent but also its power of input and output satisfy the power conservation; In the network any a power is the algebra sum of the power components with different distribution coefficients. Then, according to analyzing of the network overall situation and the cross section flow, the analytical theories system called power component theory and its distribution mechanism is established. Through contrasting and anglicizing, some existing extensive research of the method are unified into power component theory, which makes clear of how to decompose power and makes this problem theorization and systematization.Up to the present superposition theorem just is used for the calculation of electric voltage, electric current, don’t involve its physics attribute, namely whether or not electric current and voltage produced by alone supply are same to the current and voltage produced by all supplies at same time? Superposition theorem is thought just a kind of number calculation method, still its result is true of electric voltage and electric current of physics distribute? This problem has not been studied from the existing documents. First time the dissertation questions this problem and makes elementary research, and as beneficial complement of theories mathematics proving physics experiment further perfects power component theory.In the process of proving conservation of power component symmetry of network admittance is very important and quoted many times, so a question is put out that whether power component is correct and what its manifestation in the dissymmetry network with controlled source. Making use of a shunt-wound controlled current source between the node and the ground elucidation is carried on. Regular power distribution change is found after controlled source is shunt, so foundation power and additional power are defined. The power component changes into foundation power component and additional power component at the dissymmetry network, and two synthesize for total of power component addition to foundation power component and additional power component respective conservation.Under the premise that the cross section flow of the electric power network is known, the electric power network is formed. Making use of the basic theories of power component to analyze power distribution of network, a new flow tracing model and arithmetic is brought out. The model takes vantage of power component theory, and resolves the electric network into several decoupled network. Each power supply under the background of power physics meaning is dependent, then the problem that how decompose across-item is fully thought; Flow and loss being tracked together, loss allocation is taken into account in the process of flow tracing in view of the coupled property between active power and reactive power. A new electric current tracking principle is put forward that the node power is distributed according to the ratio of two conjugated current, which are confirmed by superposition theorem.更多还原