山东大学“稷下风”研究生学术讲坛

讲坛题目：Protection and Control Systems and Wide Area Schemes

会议内容：

Title: Protection and Control Systems and Wide Area Schemes

Power system state estimation is the enabler of energy management system (EMS), and plays a vital role in power system protection and control. The state estimator is responsible for providing accurate data for the EMS so that it can work so that it can work reliably. To be more specifically, the functions of the state estimator include making the optimal estimate based on a redundant set of measurements (which is true for transmission networks) with certain levels of errors, detecting and identifying bad data, sudden load changes, unreported topology changes and even cyber attacks with false data injection. Classical state estimators have relied on the measurements provided by Supervisory Control and Data Acquisition (SCADA) system to estimate the states. Recently, with the advent of synchronised measurement technology (SMT) facilitated by a new type of measurement device called phasor measurement unit (PMU), state estimator is expected to substantially improve its performance with much higher estimation accuracy and even real-time monitoring of the power system. However, challenges are also established to improve the state estimators so that they can work with SMT and take its full benefits. This lecture will present an introduction of power system state estimation in transmission networks, including details of the functions of the state estimator as given above and a story of how state estimators evolve with the advent of SMT.

Title: Distribution System State Estimation

The key component of DMS (Distribution Management System) is state estimation function. The task of state estimation is to provide an optimal estimate of the complex bus voltages in the entire distribution system by using the set of available measurements. Distribution system state estimation currently employs conventional real-time measurements from SCADA (Supervisory Control and Data Acquisition), which are typically available at the high-to-medium voltage substation. The rest of the distribution network is poorly monitored what causes low redundancy. A large number of pseudo measurements must be provided to achieve a full network observability. Pseudo measurements are usually based on daily profiles from historical database or weather forecast. Consequently, they are characterized by limited accuracy which affects the quality of state estimates. Modern distribution networks are expected to include PMUs (Phasor Measurement Units) in the future, which can increase the accuracy level of state estimation or even pave the path to the real-time state estimation. Unlike transmission networks, distribution networks consist of radially supplied short, untransposed and unbalanced overhead power lines/underground cables. These are characterized with high R/X ratio and could be single-, two- or three-phase. Therefore, the other challenge is development of three-phase state estimation algorithms which are essential for distribution networks. This lecture will present the challenges and solutions for state estimation at distribution level, analyse different types of state estimation algorithms, explain basic functions that state estimator typically includes (topology processor, bad data processing), as well as benefits of employing PMUs in the future distribution networks.

会议形式：视频网络会议，使用腾讯会议软件，会议房间号：766295191

会议时间：2020年7月10日（周五） 15：00

主 持 人：太阳集团tcy8722副研究员 蔡德宇

主讲人简介：

金朝阳，太阳集团tcy8722副教授、硕士研究生导师；2013年获得华北电力大学和曼彻斯特大学学士学位，2018年获得曼彻斯特大学博士学位。研究方向为低惯量电力系统关键参数估计，电网状态估计。

Dragan Ćetenović，曼彻斯特大学多能源网络工程博士后研究助理；塞尔维亚克拉古耶瓦茨大学萨恰克科学技术学院助理教授；2019年获得塞尔维亚克拉古耶瓦茨大学博士学位。研究方向为综合多能源网络动态安全评估的高级状态估计、电力系统故障分析、电力系统保护、配电网和分布式能源。

主办：研究生院、党委研究生工作部

承办：太阳集团tcy8722