计及电压弹性力的多动态无功装置优化运行
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TM761

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国家自然科学基金资助项目(51707090)


Operation optimization of multi-dynamic reactive power devices with voltage resilience
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    摘要:

    为提升受端电网电压支撑能力和减少直流连续换相失败风险,文中提出一种多动态无功装置运行优化方法。首先,考虑故障后电网电压恢复速度和直流熄弧角变化关键特征,提出适用于受端电网的电压弹性评估指标,精确衡量受端电网故障后的电压恢复能力;然后,以电压弹性最大为优化目标,多动态无功补偿装置无功出力为优化变量,考虑受端电网潮流平衡、节点电压上下限等稳态约束和暂态约束条件,建立多维非线性含微分方程的数学优化模型;最后,采用粒子群算法对上述模型进行优化求解,以实际苏州南部电网为例进行仿真验证,结果表明文中方法可有效提升短路故障后电网电压恢复速度,并减少直流连续换相失败次数。

    Abstract:

    For the purpose of improving voltage support capacity of receiving-end power grid and reducing the risk of high voltage direct current (HVDC) continuous commutation failure, this paper presents an optimization method for the operation of multi-dynamic reactive power devices. Firstly, considering the key characteristics of voltage recovery speed and extinction angle of HVDC after faults, the evaluation index of voltage resilience for receiving-end power grid is introduced to measure the voltage recovery ability. Then, taking the maximum voltage resilience as the optimization objective, a mathematical optimization model is established. In this model, the reactive power output of multi-dynamic reactive power devices is treated as the optimization variable, while the steady and transient constraints of power grid are included at the same time. In the end, particle swarm optimization (PSO) method is used for calculating in the proposed model. To testify the correctness of the model, Suzhou southern power grid is utilized to simulated. The result shows that it effectively improves the recovery speed of grid voltage after short-circuit fault and reduces the number of HVDC continuous commutation failure.

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赵欣,施祎辰,张宁宇.计及电压弹性力的多动态无功装置优化运行[J].电力工程技术,2021,40(3):78-83

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  • 收稿日期:2020-11-23
  • 最后修改日期:2021-01-04
  • 录用日期:2020-09-14
  • 在线发布日期: 2021-06-11
  • 出版日期: 2021-05-28
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