基于N-1和负荷特性的配电网最大接入容量研究

The largest access capacities analysis of distribution grid based on N-1 and the load characteristics

分析配电网自动化管理系统(open2000)监测数据,发现配电网线路平均负载率偏低,一些线路处于轻载或空载状态,配电网冗余度过高、整体利用率低,资源浪费,但同时又有部分配电网线路处于重载状态,不满足N-1准则要求,影响电网可靠运行。针对以上问题,研究出了基于N-1和负荷特性的配电网最大接入容量。对规范配电网线路接入的配电变压器总容量,使配电网经济运行、负载率合理,并满足N-1准则的要求有重要参考价值。同时也可作为对现有运行的配电网接入容量合理性的校验标准。

This paper analyzes the monitoring data of distribution automation management system （open2000） and finds that the average line load rate of distribution grid is low, some of the lines are in the light load or no-load condition, distribution grid redundancy is too high, the overall utilization is low, and the resource is wasted, but while there are parts of the distribution grid line is overloaded, which can not meet the N-1 standard requires and affect the grid reliable operation. To solve the above problems, this paper develops the maximum distribution grid access capacities based on N-I and load characteristics. It has important reference value to regulate the total capacity of distribution transformer accessing distribution line, guarantee economic operation of distribution grid and reasonable load rate, and meet the requirements of N-1 criterion. It also can be regarded as a calibration standard for access capacity rationality of existing distribution grid.