| 引用本文: | 周专,姚秀萍,王维庆,等.基于多电磁环网的功率转移研究与分析[J].电力系统保护与控制,2013,41(22):134-140.[点击复制] |
| ZHOU Zhuan,YAO Xiu-ping,WANG Wei-qing,et al.Research and analysis of power transfer based on multiple electromagnetic looped network[J].Power System Protection and Control,2013,41(22):134-140[点击复制] |
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| 摘要: |
| 随着电网用电负荷和输送功率的不断增大，电网也不断建设加强升级，出现环网和更高一级电压等级的网架结构。由于高电压等级网架建设还在初期，因此在很多地方出现了多电磁环网网架结构，多电磁环网网架对提高电网的供电可靠性有利。但是环网运行同时也将带来许多问题，如保护的配置，正常环网解环及故障解环引起的功率转移，运行线路过载等问题。多端有源的环网在环网打开时，将出现功率的转移变化，对多端供电网络产生一定的影响，影响安全自动装置动作定值设定，调度员运行控制及事故处理，保护相关定值整定等等。预先分析出环网结构打开后的功率分配对运行方式安排、事故处理，安全自动装置定值设定，防止事故扩大、保证电网安全稳定运行至关重要。通过对多电网环网打开后的功率转移进行分析，提出了功率转移比概念以及影响功率转移的因素，提出了环网线路打开后功率转移产生问题的注意事项。运用PSASP程序对某电网进行模拟仿真分析，验证了相关结论的正确性。 |
| 关键词: 电磁环网 功率转移比 循环功率 多端网络 |
| DOI：10.7667/j.issn.1674-3415.2013.22.022 |
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| 基金项目:国家自然科学基金（51267017） |
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| Research and analysis of power transfer based on multiple electromagnetic looped network |
| ZHOU Zhuan1,YAO Xiu-ping1,2,WANG Wei-qing1,CHANG Xi-qiang2,WANG Hai-yun1,WANG Heng2 |
| () |
| Abstract: |
| With the increasing of grid electricity load and transfer power, power grid is also strengthening, which leads to the emergence of looped network and a grid structure of higher voltage level. Because the space truss construction of high voltage level is still in initial stage, grid structures of electromagnetic loop network appear in many places. Electromagnetic looped network frame is beneficial for the increase of power supply reliability of power grid. But looped network operation has its shortcomings in the aspects of the protection configuration, the power transfer caused by normal looping-off of looped network and fault, operation line overload and so on. When the multi-terminal active looped network is opened, the power is transferred, which has effects on supply network, including the setting of automatic safety devices, operational control and accident handling. To analyze the power distribution in advance after the opening of the looped network is very important for arranging operation modes, handling accidents, setting the automatic safety device, preventing accidents from enlarging and ensuring the safety and stable operation of the looped network. Based on the analysis of power transfer of the opening looped network, the paper also offers the definition of power transfer ratio and the factors which affect power transfer. Some precautions about power transfer after the opening of the looped network are provided. The PSASP procedure is used to analyze looped network in the way of analog simulation, which proves the correctness of the related conclusion. |
| Key words: looped electromagnetically coupled power network power transfer ratio cycle power multi-terminal networks |
