电网线损的物理分布机理

电网线损是电力系统运行的基础参数,考虑市场因素,传统意义的网损必须附加来源,因此,网损分摊成为研究的热点,并已出了多种计算方法,但这些方法最终必须面对的问题是两乘数占其积的比例,这是一个没有定义的数学命题,没有解决方案,无法获得到令人满意的解释.该文从网损产生的本质出发,指出电网能量的分布规律;利用能量的一维特性,提出功率线性叠加定理;通过理论分析得到了基于能量线性叠加的电源输出功率、支路传输功率和支路线损解析表达式,给出了电源对线损的能量分布系数和线损与电源关系的解析表达式,从而构建了完整的线损线性分析、计算的理论基础.

PHYSICAL DISTRIBUTION MECHANISM OF NETWORK LOSS FOR POWER SYSTEMS

Network loss is one of basic parameters for power systems. Thinking of the electricity market factor, the sources of the loss should be known clearly. So network loss distribution is a key work at this area. Up to now, many methods of network loss allocation are given, but they have to face a same question how to divide a product into two parts as their multipliers proportion. This is a no definition proposition, no solution way, so results of these network loss allocation methods are not correct. In this paper, starting with analyzing the physics essence of network loss, the distribution law is pointed out; the linear power superposition theorem is proposed by the one dimension characteristics of energy. The analytic solutions of sources output power, branches power and branches loss power are described by superposition theorem, the network loss factors caused by sources are given, the relation analytic solution between sources and network losses is advanced. With above results, the network losses linear analysis and calculation theory is established perfectly.