一种采用直流紧急控制的特高压联络线功率摇摆峰值抑制策略

发布时间：2018-03-06 15:13

本文选题：特高压联络线　切入点：互联电力系统　出处：《中国电机工程学报》2015年10期 　论文类型：期刊论文

【摘要】：运行经验表明,长距离的华中华北互联电力系统间特高压联络线容易遭受扰动影响,产生大幅度、长周期的功率摇摆。而过高的功率摇摆峰值,很可能导致互联系统第一摇摆失稳的问题。针对该问题,首先设计了一种基于最大上升斜率的摇摆峰值预测算法;接着根据预测的峰值,提出一种采用直流紧急控制的特高压联络线功率摇摆峰值抑制方法;最后,建立了直流紧急控制的自定义模型并对控制方案进行仿真验证。结果表明,摇摆峰值预测算法具备较高的准确性,直流紧急控制策略也能充分地削弱特高压联络线功率摇摆峰值,从而有效提高特高压联络线的输电能力和互联系统的暂态稳定性。同时,该直流紧急控制策略实现简单,对不同扰动都具备较好的适应性,具有较高的工程实用价值。
[Abstract]:The operation experience shows that the long-distance UHV tie-line between the interconnected power systems in central China and North China is vulnerable to disturbance, resulting in large amplitude and long period power swing, and too high power swing peak. It is possible to cause the first rocking instability of interconnected systems. In order to solve this problem, a rocking peak prediction algorithm based on the maximum rise slope is designed firstly, and then according to the predicted peak value, An UHV tie-line power swing peak suppression method using DC emergency control is proposed. Finally, a self-defined model of DC emergency control is established and the control scheme is verified by simulation. The rocking peak prediction algorithm has high accuracy. The DC emergency control strategy can also reduce the swing peak of UHV tie-line power, thus effectively improve the transmission capacity of UHV tie-line and the transient stability of interconnected system. The DC emergency control strategy is simple to realize, has better adaptability to different disturbances, and has higher engineering practical value.
【作者单位】：强电磁工程与新技术国家重点实验室(华中科技大学);中国电力科学研究院;
【基金】：国家863高技术基金项目(2011AA05A119)~~
【分类号】：TM723

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