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 In order to develop a general, canonical and analytical network reconfiguration method, a novel concept of optimal matching loop flow is introduced in this paper and used to reconfigure distribution network. The concept is based on loopanalysis and superimpose theorem in basic circuit theory. Based on this novel concept, an efficient algorithm proposed and it consists of two steps. At the first step, all the tie breakers are closed to form a meshed network and then an optimal matching loop flow is calculated... In order to develop a general, canonical and analytical network reconfiguration method, a novel concept of optimal matching loop flow is introduced in this paper and used to reconfigure distribution network. The concept is based on loopanalysis and superimpose theorem in basic circuit theory. Based on this novel concept, an efficient algorithm proposed and it consists of two steps. At the first step, all the tie breakers are closed to form a meshed network and then an optimal matching loop flow is calculated to determine the breakers most suitably to be opened in each loop. Some times, more than one breaker maybe selected to be opened in the same loop. To solve this problem, an efficacious criterion is developed. After first step, the network is configured into radial structure again. To further optimize network, an optimal matching loop flow for radial network is also introduced at the second step. It simulates the operation of load transferring between the sides of opened breakers. Numerical tests show that this algorithm is efficient and robust.  为了开发出一种通用的、规范化的和适用于配电重构的解析算法,该文提出了一个新颖的概念——最优匹配回路流,它可以应用于单相模型和三相模型。最优匹配回路流是从回路分析法和电路叠加原理推导而来的。基于这种概念本文开发出一种高效的重构算法,该算法可以同时处理经济和安全两个目标,是一种高效的解析算法,即可以应用于规划研究,也可以应用于实时控制。算法主要由两步构成:在第一步计算中合上所有联络开关:然后计算全网的最优匹配回路流以决定每个回路中最适合打开的开关。由于有些回路可能存在共同的支路集,所以有时会出现有多个被选中的开关存在于同一回路中的情况,为了解决该问题,文中提出了一个实用判据以决定开合顺序。经 过第一步的计算,得到了一个优化后的辐射状电网,为了进一步优化网络,文中提出了面向辐射电网的最优匹配回路流。它可以很好地模拟联络开关两端的局部负荷的转移。最后的数值算例表明本文提出的算法具有很高的效率和很好的鲁棒性,完全可以应用于实时控制。  A novel method based on superposition principle of linear circuit was proposed to allocate the power losses. Method of current superposition was used and power contribution of each power source was represented by the product of total voltage and individual current. The net loss of each branch caused by individual power source was computed by the product of total voltage drop and individual current. Losses allocation between the power sources and loads in certain percentage was calculated on the basis of the... A novel method based on superposition principle of linear circuit was proposed to allocate the power losses. Method of current superposition was used and power contribution of each power source was represented by the product of total voltage and individual current. The net loss of each branch caused by individual power source was computed by the product of total voltage drop and individual current. Losses allocation between the power sources and loads in certain percentage was calculated on the basis of the factors of contributions of individual generators to loads. The allocation of the active power losses and that of the reactive power losses can be calculated at the same time. The simplicity and good adaptability of the method is obvious. The rationality of the method is proved by the examples of IEEE 14 bus system.  提出基于线性电路叠加原理的功率贡献计算方法,用各电源共同作用时的负载电压与单独作用时的负载电流的乘积表示电源对负载的功率贡献,并用这种方法解决电力市场中的网损分摊问题。用电源共同作用时的线路压降和单独作用时的线路电流的乘积计算各个电源在各条支路上引起的网损,计算系统网损在各个电源中的分摊。根据电源对负荷的功率贡献因子计算电源和负荷分别承担网损及它们按比例承担时的系统网损分摊。该方法原理简明、计算量小、方便灵活、合理性强。以IEEE14节点系统为例进行仿真计算,验证了该方法的合理性。  Based on a type of mixed and controlling AVC practical system,a brief analysis on the design and fulfillment of the gateway reactive power control is given.On the one hand,it has kept the system's original advantages and disintegrates the electric,power network according to its power supplying area.Based on the most elementary addup principle,it also calculates the sensibility between the condenser's response and the branch circuit of district gateway,and a heuristic method on juncture's control is designed.Many... Based on a type of mixed and controlling AVC practical system,a brief analysis on the design and fulfillment of the gateway reactive power control is given.On the one hand,it has kept the system's original advantages and disintegrates the electric,power network according to its power supplying area.Based on the most elementary addup principle,it also calculates the sensibility between the condenser's response and the branch circuit of district gateway,and a heuristic method on juncture's control is designed.Many other aspects have been taken into consideration in the design,such as the adjustment of optimization strategy,reactive power control on quality of voltage and optimization of wire damage.Some practical dealing on close control to make the strategy more practical and reliable are applied.The scene concrete cases show that this calculating method is very practical,reliable,and will not cause convergent problem.It can meet the needs of district power network management effectively.  基于一个混合控制型的AVC实用系统,对地区电网的关口无功控制进行了设计与实现。在保留了既有系统的优点的同时,在拓扑上将地区电网按照供电区域进行解耦,并基于最基本的电路叠加原理,计算出电容器投切与地区关口支路灵敏度,从而设计出了启发式的关口控制方法。在设计中考虑了与既有优化策略的协调,考虑了关口无功控制对电压质量、线损优化的影响。在闭环控制中采用一些实用化处理,使得控制策略更加实用可靠。现场控制实例表明,算法实用、鲁棒性好,无收敛性问题,有效满足地区电网的管理需求。  
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