#### 期刊菜单

Method and Modeling of “Grid Planning” Reliability Calculation Based on Typical Target Grid
DOI: 10.12677/JEE.2021.94018, PDF, HTML, XML, 下载: 92  浏览: 134

Abstract: In response to the diversified development requirements of the increasingly complex distribution network, the State Grid Corporation proposed the concept of “grid planning” to realize the refined management of the distribution network and the high-reliability requirements of users. However, there is still a lack of power supply reliability calculation methods that reflect the characteristics of “grid planning”. Based on the improved failure mode consequence analysis method, this paper uses typical wiring as the minimum calculation unit, corresponding to the power supply unit and the power supply grid, and quantitatively associates the reliability index of the distribution network with the load density, the target grid of the distribution network, whether to use distribution automation, and distribution equipment, etc., to quickly realize the reliability index calculation of the “grid planning” of the distribution network, and meet the high power supply reliability needs of different grid users.

1. 引言

2. “网格化”框架层级

2.1. “网格化”目标网架框架

Figure 1. Schematic diagram of grid-based target grid construction framework

2.2. “网格化”供电单元模型

3. “网格化”可靠性计算模型

3.1. 模型构建的方法

1) 故障模式下的配电网可靠性

Figure 2. Schematic diagram of model building

2) 考虑预安排停电的配电网可靠性

3) 配电网网格化规划可靠性

3.2. 模型计算思路流程

Figure 3. Schematic diagram of three-segment single contact fault diagram

3.3. 典型单元停电时间

3.4. 供电单元组合模型

4. 算例分析

4.1. 算例概况

Figure 4. Algorithm flowchart

Table 1. Algorithm formulas for power outage time of typical units in medium voltage cable network

Table 2. Algorithmic formulas of outage time for typical units in medium voltage overhead network

Figure 5. Schematic diagram of the division of power supply units in the core area of L city

Figure 6. Schematic diagram of power grid division in the core area of L city

4.2. 边界条件参数设置

Table 3. Reliability parameter setting of power grid components

4.3. 典型供电模式可靠性

1) 架空有联络

Table 4. Reliability calculation results for overhead lines with connections

Figure 7. Overhead line has contact reliability calculation results

2) 电缆单环网、双环网

Table 5. Cable reliability calculation result

Figure 8. Cable reliability calculation results

4.4. 供电单元可靠性

Table 6. Reliability calculation results of each power supply unit of the Science and Technology Park grid

4.5. 供电网格可靠性

Table 7. Power grid reliability calculation

4.6. 供电可靠性结果校验

Table 8. Power grid reliability calculation

5. 结语

1) 基于典型目标网架的“网格化规划”中，采用由果索因的改进故障模式后果分析法，可以计算典型供电模式可靠性、供电单元和供电网格的供电可靠性。

2) 采用本文设计开发的模型算法，可以快速分析规划阶段不同供电网格和单元供电可靠率，满足不同网格用户的高供电可靠性需求，具有重要的实用价值。

 [1] 姚刚, 仲立军, 张代红. 复杂城市配电网网格化供电组网方式优化研究及实践[J]. 电网技术, 2014, 38(5): 1297-1301. [2] 国家电网公司. 国家电网公司配电网网格化规划指导原则[EB/OL]. https://www.doc88.com/p-6002584302211.html, 2019-05-22. [3] 郭经, 刘文霞, 张建华, 等. 主动配电信息物理系统可靠性建模与评估方法综述[J]. 电网技术, 2019, 43(7): 2403-2412. [4] 王艳玲, 梁立凯, 韩学山, 等. 计及动态热定值的配电网可靠性分析[J]. 中国电机工程学报, 2017, 37(5): 1410-1416. [5] 石敏, 周步祥, 张冰, 等. 计及分布式电源不确定性的配电网系统可靠性评估[J]. 电力系统及其自动化学报, 2017, 29(12): 114-120. [6] 昝贵龙, 赵华, 吴延琳, 等. 考虑容量及电压约束的配电网可靠性评估前推故障扩散法[J]. 电力系统自动化, 2017, 41(7): 61-67. [7] 欧阳森, 刘丽媛. 配电网用电可靠性指标体系及综合评估方法[J]. 电网技术, 2017, 41(1): 222-229. [8] 王浩浩, 管霖, 吴熳红. 配电网可靠性评估中预安排停电的实用数学模型[J]. 电力系统自动化, 2011, 35(23): 59-63+81. [9] 侯佳, 吴志力, 崔凯, 基于双Q的新型配电网网格化规划方法[J]. 广东电力, 2019, 32(4): 17-25. [10] 姚刚, 刘速飞, 金佳. 计及负荷密度的复杂城市配电网接线模式匹配研究[C]//中国电机工程学会. 2013年中国电机工程学会年会论文集. 成都: 中国电机工程学会, 2013: 7. [11] 姚刚, 杨明, 帅浩, 刘速飞, 金佳. 基于“网格化”管理的配电网可靠性分布研究[J]. 华东电力, 2014, 42(9): 1802-1806. [12] 国家能源局. DL/T5729-2016. 配电网规划设计技术导则[S]. 北京: 中国电力出版社, 2016. [13] 商海涛, 吴林, 赵渊, 等. 计及集中式馈线自动化的配电网可靠性评估模型[J]. 电力自动化设备, 2017, 37(5): 129-135+141. [14] 杨建林, 陈龙, 郭明星, 等. 考虑预安排停电的配电网可靠性评估方法[J]. 高电压技术, 2017, 43(4): 1248-1255. [15] 邱生敏, 王浩浩, 管霖. 考虑复杂转供和预安排停电的配电网可靠性评估[J]. 电网技术, 2011(5): 121-126. [16] 赵渊, 赵勇帅, 王洁, 范飞. 复杂配电网可靠性评估的由果索因法[J]. 重庆大学学报, 2014, 37(7): 1-10.