电子科技大学：《电力系统运行与控制 Power System Operation and Control》课程教学资源（课件讲稿）Lecture 08 power system state estimation

Lecture 8 power system state estimation Dr.Qi Huang School of Energy Science and Engineering,UESTC

Lecture 8 power system state estimation Dr. Qi Huang School of Energy Science and Engineering, UESTC

Contents Introduction-Why we need state estimation in power system Problem Formulation Case Study Advanced topics: Hybrid Power System State Estimation (with SCADA and PMU) Placement of Meters Power System Sensor Network(PSSN by UESTC) 电力拿镜广城洲量写控制四川省童点实验蜜 家电

电力系统广域测量与控制四川省重点实验室 Contents  Introduction-Why we need state estimation in power system  Problem Formulation  Case Study  Advanced topics:  Hybrid Power System State Estimation (with SCADA and PMU)  Placement of Meters  Power System Sensor Network (PSSN by UESTC)

Introduction-Why we need state estimation in power system

Introduction-Why we need state estimation in power system

Introduction-why we need state estimation Contingency Normal preventive Alert State State control Contingencies Multiple Contingency control control control Emergency State Loss of load Restorative Sate Power Systemn Security↓eves量多控制四川省童点实验蜜 家电

电力系统广域测量与控制四川省重点实验室 Introduction-why we need state estimation Normal State Alert State Emergency State Restorative Sate control control control preventive Contingency Loss of load Power System Security Levels

Introduction www xianchanhe.com Modern Power System Control 电力镜广城测量与控制四川省重点实验蜜 家电

电力系统广域测量与控制四川省重点实验室 Introduction Modern Power System Control

Introduction-Online control of power system Real-time Power System Data RTU RTU Substation host computer SCADA DBMS OPF Security analysis State estimation Operator Graphical interface Load flow Short-circuit analysis Stability analysis 点实验蜜 家电

电力系统广域测量与控制四川省重点实验室 Introduction-Online control of power system Real-time Power System Data RTU RTU Substation host computer SCADA Operator DBMS Short-circuit analysis Stability analysis Load flow State estimation Graphical interface OPF & Security analysis

Introduction-power system measurement Control Center 0☐ V P and Q measurements n 2例 电力集镜扩城闲量与拉的坚矗产来变写 家电网

电力系统广域测量与控制四川省重点实验室 Introduction-power system measurement Control Center V V : P and Q measurements n = 2 N - 1 1.5  m / n  3

Introduction 2 B3=62MW=0.62pu 乃2=6MW=0.06pu P23=37MW=0.37pu X13=0.2 X12=0.4 Simplified load flow calculation: X23=0.25 ③ f2=1(8-82)=B2 X12 f=1(02-9,)=B3 X23 Assumi®. 电名，壁行城闲量与拉刻回川省童立实验室 家电

电力系统广域测量与控制四川省重点实验室 Introduction ~ ~ 1 2 3 P MW pu P MW pu P MW pu 37 0.37 6 0.06 62 0.62 2 3 1 2 1 3       0.25 0.4 0.2 2 3 1 2 1 3    X X X Simplified load flow calculation: 0 ( ) 1 ( ) 1 2 2 3 2 3 2 3 2 3 1 2 1 2 1 2 1 2             P x f P x f Assuming:

Introduction-Power System State Estimation State Estimation is the process of assigning a value to an unknown system state variables based on measurements from the system according to some criteria. Functionalities: o Provide an estimate for all metered and unmetered quantities; Filter out small errors due to model approximations and measurement inaccuracies; Detect and identify discordant measurements,the so- called bad data 电力镜广城测量乌控制四川省重点实验蜜 国家电

电力系统广域测量与控制四川省重点实验室 Introduction-Power System State Estimation  State Estimation is the process of assigning a value to an unknown system state variables based on measurements from the system according to some criteria.  Functionalities:  Provide an estimate for all metered and unmetered quantities;  Filter out small errors due to model approximations and measurement inaccuracies;  Detect and identify discordant measurements, the so￾called bad data

Problem Formulation

Problem Formulation