CAJ | 학술논문

为了提高配电网状态估计的计算精度和计算速度，针对常规抗差状态估计算法迭代次数较多的特点，给出了一种以节点电压为状态量，基于预测残差的配电网三相抗差状态估计方法。利用了配电网中各种类型的量测，通过对节点电压和支路电流的相位变换，以及对电流幅值量测进行的等效量测变换，实现了整个雅可比矩阵的常数化，在迭代过程中保持不变，降低了计算量。基于预测残差的信息设置抗差状态估计中的等价权，避免了常规抗差状态估计算法对等价权修正中不必要的多次迭代，提高了收敛速度。算例分析表明，所提的算法抗差能力强、计算速度快、数值稳定性和鲁棒性较好。
위료제고배전망상태고계적계산정도화계산속도，침대상규항차상태고계산법질대차수교다적특점，급출료일충이절점전압위상태량，기우예측잔차적배전망삼상항차상태고계방법。이용료배전망중각충류형적량측，통과대절점전압화지로전류적상위변환，이급대전류폭치량측진행적등효량측변환，실현료정개아가비구진적상수화，재질대과정중보지불변，강저료계산량。기우예측잔차적신식설치항차상태고계중적등개권，피면료상규항차상태고계산법대등개권수정중불필요적다차질대，제고료수렴속도。산례분석표명，소제적산법항차능력강、계산속도쾌、수치은정성화로봉성교호。
In order to improve the calculation accuracy and speed of distribution networks state estimation, this paper presents a robust algorithm of three-phase state estimation for distribution networks based on residual prediction. All kinds of measurements in distribution networks are used in the algorithm, Jacobian matrix becomes constant through phase transform of node voltage and branch current and equivalent transform of current amplitude measurement, and the amount of calculation is reduced due to Jacobian matrix remaining unchanged in the iterative process. Setting of equivalent weight based on prediction residual avoids the unnecessary iterations in the correction of the equivalent weight, which reduces the amount of computation. Simulation results show that the proposed method is stable and robust.