Research of Distributed Power
and Microgrid in IEE CAS
Xisheng Tang
Laboratory of DC Power Grid
Institute of Electrical Engineering, Chinese Academy of Sciences
[email protected]
Contents
 Introduction
 Microgrid Research Work
 Future work
2
Institute of Electrical Engineering, CAS
3
Laboratory of DC Power Grid
Members：20 researchers and 18
PhD/MD candidates
Director：Professor Qi Zhiping
Focusing on the research of
advanced technologies of electric
power
system,
including
microgrid,
advanced
energy
storage technologies and DC
power grid technologies.
4
Laboratory of DC Power Grid
Microgrid Lab
5
Microgrid
 Operation Principles and Stability Analysis
 Transient Simulation
 MG Energy Management System
 DG, ESS and other key tech.
 MG Demonstrations
6
Microgrid
 Operation Principles and Stability Analysis
异步风机发电单
元小信号模型
G1
net1
(1  BG1 1 Dnet
)
0
 BG1 1 Dnet
'

G2
net 2'
0
(1  BG1 2 Dnet
)
 BG1 2 Dnet

G 2 G 2'
G 2 net 2'
G1 net1'
  B G1 D G1'
 Bnet
Dnet
(1  Bnet
Dnet  Bnet
Dnet )
net net

C2
C3 V 3
G 2'
C2
C3 V 3
net 2'
0
 ( BG 2  BG 2 DG 2 ) Dnet  ( BG 2  BG 2 DG 2 ) Dnet

'
同步电机发电
单元（柴油机、
微燃机）
微电网数
学模型
逆变器并网型发
电单元（光伏发
电、储能）
'
  G1 
0  x 

0 x G 2 
  
0  xnet 
 
1  x c 
 G 2 
 G1 
G1
net1
 AG1  BG1 1 Dnet
  x 
0
BG1 1 Dnet
0


G2
net 2
0
AG 2  BG1 2 Dnet
BG1 2 Dnet
BG2 2 DGV 12  BG3 2 BG4 2  x G 2 



G1 G1
G2 G2
G1 net1
G 2 net 2
 Bnet
  x 
Dnet
Bnet
Dnet
Anet  Bnet
Dnet  Bnet
Dnet
0
net


G2
net 2
0
BGC21  ( BGC22  BGC23 DGV 23 ) Dnet
( BGC22  BGC23 DGV 23 ) Dnet
AGC2  BGC23 DGV 24  BGC23 DGV 12   c 

 x G 2 
 BG2 1

0


2
V2
0
BG 2 DG 2   u G1 


0
 u G 2 
0

C4
C3 V 2 
 0 ( BG 2  BG 2 DG 2 )

 A X  BX  CU
微网网络模型

 X  A1 BX  A1CU
Mathematical Models of Microgrid
7
Microgrid
 Operation Principles and Stability Analysis
Grid
Fault
Fault Clearance
Reconnection
Planned
Maintenance
EMS
Unintentional
Islanded
Intentional
Islanded
Black Start
Islanded
Operation
V/f Control
PQ Control
Mode
Transfer
V/f Control
Mode
Transfer
Smooth Reconnection
GridConnected
Operation
Short transition time
High Power Quality & Reliability
Operation Principle of Microgrid
8
Microgrid
 Microgrid Simulation and transient stability analysis
Matlab中的仿真
模型图
DIgSILENT
MatLab/Simulink
Simulation Platform of Microgrid
9
Microgrid
 Microgrid Simulation and transient stability analysis
Digital-Analog Hybrid Simulation based on RT-Lab
Simulation Platform of Microgrid
10
Microgrid
 Centralized Energy Management System
MG-PAMS (Microgrid Power
Automatic Management
Software)
SCADA (Supervisory Control
And Data Acquisition)
MG-RTCS (Microgrid RealTime Control Software)
Architecture of Centralized Energy Management System for Microgrid
11
Microgrid
 Control Technology for Distributed Power Sources
 Wind Power simulation Platform
12
Microgrid
 Control Technology for Distributed Power Sources
 PV Simulation Platform
DC/DC
电
网
三相
整流
电路
DC/AC
MPP
DC/DC
降压斩
波电路
PWM
Sun
Tc
DC/AC
电压型
逆变器
Udc
DSP 2
控制电路
电
网
变压器
PWM
Idc
DSP 1
控制电路
SCR
三相电
力开关
三相
负载
iabc
uabc
Controller Based on DSP
Simulation of the PV power fluctuation with the variation of
sunshine and temperature
13
Microgrid
 Control Technology for Distributed Power Sources
 Microturbine (Combined Heat and Power)
14
Microgrid
 Control Technology for Distributed Power Sources
双向DC/DC变换器
PMW变换器
LC滤波器
电网
超级电
容器组
100kVA/1kWh Supercapacitor Energy Storage System
15
Microgrid
 Control Technology for Distributed Power Sources
400V,50Hz 电网
电
网
负
荷
LC 滤波
LC 滤波
LC 滤波
AC
AC
AC
DC
DC
DC
DC
永磁同步
电机
飞轮转子
N#飞轮储能单元
MG
并网逆变
单元
DC
AC
AC
MG
DC
AC
永磁同步
电机
飞轮转子
2#飞轮储能单元
MG
永磁同步
电机
飞轮转子
1#飞轮储能单元
100kVA/1kWh Flywheel Energy Storage Matrix
16
Microgrid
 Control Technology for Distributed Power Sources
50kVA
100kVA
500kVA
Battery Energy Storage System with Double Operation Modes
17
Microgrid
 Control Technology for Distributed Power Sources
100kW SuperCap/Li Battery Hybrid
Renewable Energy Fluctuation Smooth
100kVA SuperCap/Battery Hybrid Energy Storage System
18
PET
 PET is a key equipment in distributed smart grid
with the functions of electric isolation, voltage
transform and reactive power compensation.
 A 500kVA PET is developed based on Modular
Multi-level Converter (MMC) and smart control.
SM
SM
SM
SM
SM
SM
Z1
高频
变压器
Z2
低压DC-DC变换器
SM
Larm
SM
Larm
SM
Larm
高
压
直
流
三相
10kV
高压
交流
Larm
Larm
Larm
SM
SM
SM
Z1
SM
SM
SM
SM
SM
Z2
低压DC-DC变换器
Z1
SM
高频
变压器
高频
变压器
低
压
直
流
至
低
压
直
流
微
网
Z2
低压DC-DC变换器
10kV Power Electronic Transformer
中国科学院电工研究所
MMC
ISOP型DC-DC变换器
Main Circuit Topology
19
PESCL
 Power Electronic based Short Current Limiter
(PESCL) is a key equipment for the reliability
operation of power system with the ability of
short current limit and power flow control.
 A PESCL is developed with novel topology, online fault current detection and control method,
which can reduce 79% of the short current.
PESCL Topology
10kV PESCL
中国科学院电工研究所
20
Smart Meter and Energy Management
Smart Meter
Smart Sockets
•
Make good use of the information of power utility,
distributed generations and local loads to facilitate
demand side response.
中国科学院电工研究所
Smart Energy Management Terminal
21
MG Demonstration 1
中国科学院电工研究所
22
MG Demonstration 1
Grid
PV
Grid
Connected Set
DC/AC
WG
保护装置
Sensitive
Load
分布式能源并网接口
DC/AC
电力监测设备
Normal
Load
Energy Hub
Battery
Microgrid in One---Energy Hub (eHub)
中国科学院电工研究所
23
MG Demonstration 1
Dynamic from grid-tied
to islanded
Seamless transition between grid-connected operation and islanded operation when
unintentional islanding occurred
中国科学院电工研究所
24
MG Demonstration 2
• A 4-terminal based DC loop power grid is designed, which can be used for DC microgrid
R&D, as well the simulation of high voltage DC grid.
中国科学院电工研究所
25
MG Demonstration 2
• A DC microgrid demonstration was established containing PV, wind power, hybrid
energy storage and typical loads with grid-tied and islanded operation modes.
• A novel DC grid voltage based on Master/Slave Droop control method is presened,
which can make the voltage regulation more precise and reliable.
725
724
723
PV & Wind Power
Li Battery and EDLC
负载电压U/V
722
721
720
从模块下垂曲线
主模块下垂曲线
719
718
717
716
715
7
MG EMS
AC/DC Interface
中国科学院电工研究所
7.5
8
8.5
功率P/kW
9
9.5
10
10.5
DC Voltage Regulation Based on Master/Slave
Droop control
Flywheel Matrix
26
Future Work
 As an open tech. framwork, microgrid needs further research and market
positioning of for renewable energy facilitation, load shaving, power system
black start, and power reliability and quality, etc.
 Advanced technologies and key equippments for distributed generation,
energy storage and energy management such as current sharing of parallel
micro-sources, medium-voltage energy storage system based on MMC, fault
location and self-healing, demand side response and more microgrids
coordination.
 DC microgrid/grid model, stability analysis and voltage control.
27
Thank you for your attention!