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1.河海大学能源与电气学院,江苏省南京市 211100
2.南瑞集团有限公司(国网电力科学研究院有限公司),江苏省南京市 211106
Received:04 August 2022,
Revised:2022-11-07,
Published Online:10 March 2023,
Published:25 August 2023
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黄蔓云,费有蝶,卫志农等.高比例新能源下的交直流配电网预测辅助区间状态估计[J].电力系统自动化,2023,47(16):34-43.
HUANG Manyun,FEI Youdie,WEI Zhinong,et al.Interval State Estimation Aided by Forcasting for AC/DC Distribution Network with High Proportion of Renewable Energy[J].Automation of Electric Power Systems,2023,47(16):34-43.
黄蔓云,费有蝶,卫志农等.高比例新能源下的交直流配电网预测辅助区间状态估计[J].电力系统自动化,2023,47(16):34-43. DOI: 10.7500/AEPS20220804001.
HUANG Manyun,FEI Youdie,WEI Zhinong,et al.Interval State Estimation Aided by Forcasting for AC/DC Distribution Network with High Proportion of Renewable Energy[J].Automation of Electric Power Systems,2023,47(16):34-43. DOI: 10.7500/AEPS20220804001.
分布式电源(DG)出力的随机性和波动性、量测误差分布的不确定性给交直流配电网准确的态势感知带来了挑战。文中在利用区间形式描述DG出力和量测值的基础上,建立了交直流主动配电网的三相区间状态估计模型,旨在获得多重不确定性因素影响下系统状态所处的整个区间。为了获得准确的初始状态区间,利用历史状态预测当前时刻的状态区间,并基于非线性优化模型进行区间修正以确保预测区间的合理性。然后,利用基于中值定理的非线性等式放缩方法将非线性区间状态估计模型转化为线性优化模型,保证估计区间的完备性。最后,通过仿真算例验证了所提方法的有效性。
The randomness and fluctuation of distributed generators (DGs) output and the uncertainty of measurement error distribution bring challenges to the accurate situation awareness in the AC/DC distribution network. Aiming at obtaining the entire interval of system states under the influence of multiple uncertainties
this paper proposes a three-phase interval state estimation (SE) model for AC/DC active distribution networks based on the description of DG output and measurement values using the interval forms. In order to obtain an accurate initial state interval
the state interval at the current moment is predicted by using the historical state
and the interval correction is performed based on the nonlinear optimization model to ensure the reasonableness of the predicted interval. Then
the nonlinear interval SE model is transformed into a linear optimization model by using a nonlinear equation deflation method based on the median theorem to ensure the completeness of the estimated intervals. Finally
the effectiveness of the proposed method is verified by simulation.
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