CAJ | 학술논문

配电网的降损节能始终是电力行业业内人士关注的重要问题之一.该文研究通过分布式电源(distributed generation,DG)的配置实现配电网降损的方法.首先,在不考虑 DG 接入最大容量限制的前提下,在负荷均匀分布条件下的配电网,以降损效果最明显为原则,确定了配置DG的“2/3原则”.对于负荷非均匀分布条件的配电网,根据“2/3原则”确定DG的初始配置点,然后在满足功率平衡、节点电压、线路传输功率、DG接入容量限制的条件下,以负荷的平均功率因数为基准,以配电网的损耗最小为原则确定DG配置容量和位置.以实际配电网为例,进行计算、分析和比较,结果表明,该文提出的方法在不同负荷情况下降损效果非常明显.利用该文提出的方法,可以有效地实现配电网降损节能的目标,而且在实际配电网中非常容易使用.
배전망적강손절능시종시전역행업업내인사관주적중요문제지일.해문연구통과분포식전원(distributed generation,DG)적배치실현배전망강손적방법.수선,재불고필 DG 접입최대용량한제적전제하,재부하균균분포조건하적배전망,이강손효과최명현위원칙,학정료배치DG적“2/3원칙”.대우부하비균균분포조건적배전망,근거“2/3원칙”학정DG적초시배치점,연후재만족공솔평형、절점전압、선로전수공솔、DG접입용량한제적조건하,이부하적평균공솔인수위기준,이배전망적손모최소위원칙학정DG배치용량화위치.이실제배전망위례,진행계산、분석화비교,결과표명,해문제출적방법재불동부하정황하강손효과비상명현.이용해문제출적방법,가이유효지실현배전망강손절능적목표,이차재실제배전망중비상용역사용.
The loss reduction and energy saving of the distribution network is one of the most important issues to be concerned in the power industry all the time in the world. With the increased penetration of distributed generation (DG), there is a new opportunity for the problem of loss reduction and energy saving in distribution network at present. This paper studied the power loss reduction method by the configuration of the DG in the radial distribution network. From the simple radial distribution network with symmetrical load, this paper made further efforts to research on the problem of loss reduction in the actual network. First of all, without considering the penetration maximum capacity constraints of DG to be connected to a distribution network, and under the conditions of symmetrical load flow in the simple network, the mathematical models of current flow were established, the algorithm expression of the network loss reduction was determined after the DG configuration. Then, according to the rule of the clearest effect of power loss reduction after the DG configuration, the ‘2/3 principle’was determined to configure the DG in the simple radial network. As to the actual radial distribution network with asymmetrical load flow, the algorithms of the branch current and the power loss were given firstly. And then, according to the ‘2/3 principle’to determine the initial configuration point of DG, and under the constraint conditions of power balance, node voltage, transmission power, and DG capacity restriction, on the basis of load average power factor as the benchmark, the DG size and site was conformed by the minimum loss principles of the actual radial distribution network. The method proposed was applied to a real 10 kV distribution network, based on the data of the network in 2009, the DG was configured in the network, and the related calculation and analysis was implemented by the method given in this paper. By calculation, analysis and comparison, the results showed that the loss was significantly reduced under the different load conditions for used the method of this paper, and the voltage quality was obviously improved. By the proposed method in this paper, it is good to realize the goal of the loss reduction and energy saving in the distribution network effectively, and it is beneficial to improve the voltage. What’s more, it is very easy to use in the actual distribution network, and a new method is provided for energy saving and power loss reduction of the distribution network.