基于多回直流功率转移的受端电网节假日期间电压控制

发布时间：2018-02-27 00:10

本文关键词： 节假日多回直流功率转移多直流馈入系统无功交换电压控制　出处：《电网技术》2014年11期 　论文类型：期刊论文

【摘要】：节假日期间,电网负荷大幅下降,潮流轻载导致容性无功过剩,电压显著升高。对于多直流馈入受端电网,受直流换流站内绝对最小滤波器投入组数的制约,密集落点的多个直流换流站在直流低功率运行方式下会同时向交流电网注入大量容性无功,导致电网电压大幅升高且难以通过常规电压调整手段控制。提出了考虑多回直流功率转移的电压控制策略,在不改变直流总送电计划的基础上,通过优化分配多回直流的功率来改变直流与交流电网的无功交换数量,进而有效降低电网电压。华东电网实际案例和仿真计算均显示,在多回直流之间进行有功功率转移能有效地改善多直流馈入受端电网的无功潮流分布,合理控制系统电压。
[Abstract]:During the holidays and holidays, the load of the power network is greatly reduced, the light load of the power flow leads to capacitive reactive power excess, and the voltage is significantly increased. For multi-DC feed into the receiving power network, it is restricted by the absolute minimum number of filter input banks in the DC converter station. Multiple DC converter stations with dense landing points will simultaneously inject a large amount of capacitive reactive power into the AC power network under the low DC power operation mode. This paper presents a voltage control strategy considering multi-circuit DC power transfer, which does not change the total DC power transmission plan. The amount of reactive power exchange between DC and AC network can be changed by optimizing the power distribution of multi-circuit DC, and then the voltage of power grid can be reduced effectively. The actual case and simulation results of East China Power Grid show that, The active power transfer between multiple DC can effectively improve the reactive power flow distribution of multi-DC feed-through network and control the system voltage reasonably.
【作者单位】：电力传输与功率变换控制教育部重点实验室(上海交通大学);国家电网公司华东分部;
【基金】：国家自然科学基金项目(51337005)~~
【分类号】：TM714.2

【参考文献】