• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2019, Vol. 40 ›› Issue (11): 65-72.doi: 10.3969/j.issn.1000-7229.2019.11.009

• 智能电网 • 上一篇    下一篇

基于SDAE-ELM伪量测建模的高容错快速状态估计方法

陈防渐1,王玉彬1,陈奇芳1,夏明超1,杨晓楠2,韩锋2   

  1. 1.北京交通大学电气工程学院, 北京市 100044;2.电网安全与节能国家重点实验室(中国电力科学研究院),北京市 100192
  • 出版日期:2019-11-01
  • 作者简介:陈防渐(1996),女,硕士研究生,主要研究方向为电力系统状态估计; 王玉彬(1994),男,硕士研究生,主要研究方向为电力系统状态估计、电力线路参数辨识; 陈奇芳(1986),男,博士,主要从事主动配电网优化规划与调度、电动汽车充电站优化、微能源网优化运行等工作; 夏明超(1976),男,博士,博士生导师,通信作者,主要研究方向为智能配用电、微电网等; 杨晓楠(1990),女,硕士研究生,主要研究方向为电力系统自动化; 韩锋(1988),男,硕士研究生,主要研究方向为EMS系统的应用。
  • 基金资助:
    2018电网安全与节能国家重点实验室开放基金(FX83-18-002)

High Fault-Tolerant Fast State-Estimation Method Based on SDAE-ELM Pseudo-Measurement Modeling

CHEN Fangjian1, WANG Yubin1, CHEN Qifang1, XIA Mingchao1, YANG Xiaonan2, HAN Feng2   

  1. 1.School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. State Key Laboratory of Power Grid Safety and Energy Conservation (China Electric Power Research Institute), Beijing 100192, China
  • Online:2019-11-01
  • Supported by:
    This work is supported by Open Fund of State Key Laboratory of Power Grid Safety and Energy Conservation in 2018(No. FX83-18-002).

摘要: 目前在电力系统中无法保证相量量测单元完全覆盖的情况下,状态估计需要采用相量量测单元(phasor measurement unit, PMU)与数据采集与监控(supervisory control and data acquisition, SCADA)混合量测进行传统非线性状态估计,但是SCADA数据精度低,含有较多不良数据,同时混合数据需要迭代求解,会导致计算效率低且存在截断误差。针对该问题,文章提出了一种基于堆叠去噪自编码器(stack denoising autoencoder, SDAE)与极限学习机(extreme learning machine, ELM)伪量测建模的电力系统高容错快速状态估计方法。其将含有不良量测的SCADA量测数据作为SDAE-ELM伪量测模型的输入,节点电压实部与虚部作为输出,根据历史数据进行训练得到伪量测值与伪量测误差模型,训练完成后得到精度较高的伪量测;将伪量测与PMU量测一起进行快速的线性状态估计。仿真结果表明,所提方法在保证估计精度的基础上,提高了计算效率,验证了所提方法的有效性。

关键词: 高容错, 快速, 状态估计, 堆叠去噪自编码器, 极限学习机

Abstract: In the cases that the phasor measurement units (PMUs) cannot be deployed with all buses in the power system, the traditional nonlinear state estimation needs to be carried out by using the hybrid measurement of PMU and supervisory control and data acquisition (SCADA). SCADA data are low accurate and have bad data, and the iterative solution process of mixed data will lead to low computational efficiency and truncation error. In order to solve this problem, a high fault-tolerant fast state-estimation method for power systems on the basis of stack denoising auto-encoder (SDAE) and extreme learning machine (ELM) pseudo-measurement modeling is proposed in this paper. The SCADA measurement data with bad measurement are used as the input of the SDAE-ELM pseudo-measurement model, and the real and imaginary parts of the bus voltage phasors are used as outputs, the pseudo-measurement value and the pseudo-measurement error model are obtained by training the historical data. The pseudo measurement with high precision is obtained after the training and then the pseudo-measurement and PMU measurement are used for fast linear state estimation. The simulation results show that the proposed method improves the computational efficiency and verify the effectiveness of the proposed method on the basis of ensuring the estimation accuracy.

Key words: high fault tolerance, fast, state estimation, stacked denoise auto encoder, extreme learning machine

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