赤峰电网孤网运行负荷控制策略与稳定性研究

发布时间：2018-06-15 21:54

  本文选题：孤网运行 + 负荷控制策略　； 参考：《华北电力大学》2014年硕士论文

【摘要】：随着电网互联规模日益增大、电压等级不断增高,一些与主网联系薄弱的地区电网在严重复杂故障下,存在与主网解列转为孤网运行的风险,对安全、可靠供电形成严重的威胁。在系统危急情况下按最优孤网运行方式及时地将互联电网划分成多个能够稳定运行的孤网系统,既可以避免局部事故扩散引发大面积停电甚至系统崩溃所带来的巨大损失,又使得切机切负荷量最小。赤峰电网是蒙东电网中一个典型弱联系输电、供电系统,随着大规模风电和火厂机组的相继投产,电力系统内电源的规模和类型越来越庞大和多元,负荷特性复杂,具有十分严重的外送矛盾,极容易产生孤网运行的问题。因此,研究制定赤峰电网孤网运行时的负荷控制策略,并对不同运行方式下电力系统的稳定性进行分析,针对电网的稳定运行提出了具有价值且行之有效的建议和措施,具有十分重要的意义。本文首先研究了国内外电力系统出现的孤网运行的背景,对各种研究结果和经验进行了分析和总结。在对赤峰电网存在的孤网运行问题进行研究时,分别从机组侧和电网侧进行了研究。研究制定了赤峰电网孤网运行最佳的运行方式,有针对性地提出了措施和建议。以PSS/E为平台搭建了赤峰电网孤网运行分析仿真系统,对孤网运行的过程中主力电源和变电站的具体承载问题进行了分析,并且仿真研究了孤网运行时的功角、频率、电压变化情况,以此为基础提出了负荷控制方案,在孤网运行后快速实现系统稳定。。
[Abstract]:With the increasing scale of power network interconnection and the increasing voltage level, some areas with weak connection with the main network have the risk of switching from the main network to the isolated network under serious and complex faults, so it is safe. Reliable power supply poses a serious threat. When the system is in critical condition, the interconnected power network can be divided into several stable solitary network systems in time according to the optimal solitary network operation mode, which can avoid the huge losses caused by the local accident diffusion and the large area power outages or even the system collapse. It also minimizes the cutting load. Chifeng Power Grid is a typical weakly connected transmission system in Mendong Power Grid. With the large scale wind power and fire plant units being put into operation one after another, the scale and type of power supply in the power system is more and more large and diversified, and the load characteristics are complex. With very serious outgoing contradiction, it is easy to produce the problem of isolated network operation. Therefore, the paper studies and formulates the load control strategy of Chifeng power network, analyzes the stability of power system under different operation modes, and puts forward valuable and effective suggestions and measures for the stable operation of the power network. It is of great significance. In this paper, the background of isolated network operation in power system at home and abroad is studied, and various research results and experiences are analyzed and summarized. In this paper, the problem of isolated network operation in Chifeng power network is studied from unit side and grid side respectively. The best operation mode of the isolated network in Chifeng Power Grid is studied and the measures and suggestions are put forward. On the platform of PSS / E, a simulation system for analysis and analysis of isolated network operation in Chifeng power grid is built. The main power supply and the specific bearing capacity of substation are analyzed, and the power angle and frequency of the isolated network are simulated and studied. Based on the voltage variation, a load control scheme is proposed, which can quickly realize the system stability after the operation of the isolated network.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM732;TM712
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本文编号：2023776