Transcript Zhumei MIAO China Session 3 – Block 1.4

Barcelona 12-15 May 2003
DEVELOPMENT AND APPLICATION
OF THE REACTIVE POWER & VOLTAGE
REAL TIME MONITORING SYSTEM FOR DISTRIBUTION NETWORKS
Zhumei MIAO
Shaanxi Electric Power Company of China - China
[email protected]
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
1
Barcelona 12-15 May 2003
Relationship between RPVRTMS and existent
automation systems
Voltage Monitor
LM
Manual Logging
RPVRTMS
SCADA
MIS
DMS
Remote Power Meter Reading System
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
2
Barcelona 12-15 May 2003
Aim of the monitoring system
(1) To get the data and reports needed by reactive voltage
managing personnel using related reactive power and
voltage real-time information and data in automation
systems;
(2)To realize the real-time monitoring of voltage values and
reactive voltage regulation equipment at main monitoring
points;
(3)To realize the computerized management of the entire
process according to the requirements of the reactive
voltage management.
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
3
Barcelona 12-15 May 2003
System environment and developing tools
•
•
•
•
Database :ORACLE 8 or ORACLE 8i
Network :LAN
Operation System:WINDOWS 98/2000/XP
The software is worked out by integrating C/S
with B/S structures.
• Developing Tools: powerbuilder 8.0 , JSP and
VC++
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
4
Barcelona 12-15 May 2003
Function modules of the system
System Maintenance
Reactive Power & VoltageEquipmentManagement
Equipment Operation Management
RPVRTMS
Allowable Voltage Deviation Acceptance Ratio
LM & Power Factor Statistics
System Power Flow Diagram
Intelligent Analysis
Reports Management
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
5
Barcelona 12-15 May 2003
Major technical difficult points and solutions
• It is impossible to direct access the data from
the databases of other systems
– message request transmitting and receiving
program
• A huge volume of real-time data process
– to render all the time- and energy-consuming task to
be allocated to be done between one and three A.M
when there is the lightest database load
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
6
Barcelona 12-15 May 2003
System parameter maintenance
• setting of all important parameters, and
management and maintenance of the offline data.
• off-line data input and some other essential
functions to increase the flexibility,
adaptability and safety for the customer.
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
7
Barcelona 12-15 May 2003
Reactive power and voltage equipment management
• equipment desk account and device defects
• to work out reactive voltage management
materials
• Include:
– loaded voltage-regulation capacitors /reactors /automatic voltageregulation control devices /10KV line reactive compensation
capacitors / 380V low-voltage reactive dynamic compensation
boxes /capacitors of the customer/ statistical-type voltage monitor
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
8
Barcelona 12-15 May 2003
Voltage deviation monitoring module
• monitoring of the voltage deviation of subordinate
units and main monitoring points
• Data resources: SCADA, LM, DMS and
monitoring points
• Functions:
– Statistical functions
– Monitoring functions
– Inquiry functions
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
9
Barcelona 12-15 May 2003
Load Management and Power Factor Statistics
• monitoring of the reactive power equilibrium
• Data resources: SCADA, LM, DMS and
remote meter readings of power
• Functions:
– The network-wide reactive load and power factor
– The regional reactive load and power factor
– The active load, reactive load and power factor for all
voltage grades
– …
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
10
Barcelona 12-15 May 2003
Other Modules
• Intelligent analysis
• System power flow distribution diagram
• Reports management
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
11
Barcelona 12-15 May 2003
Application results of system
• System was put into use at the beginning
of 2002
• More than 200 voltage monitoring points
• 35 kV to 110 kV the line losses were
reduced by 0.5 % and resulting in 15
million kWh saved
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
12
Barcelona 12-15 May 2003
Conclusions
•
•
•
•
The Reactive Power & Voltage Real Time Monitoring System had
been developed on the information and data base of existent
automation systems.
The monitoring system can help relative person to know the
system status so they can take the optimal measures to improve
the voltage quality and reduce the line loss of the system.
The Monitoring system had shown good results since the system
put into operation.
It is needed to put into the system the monitoring of the new
indexes such as harmonic wave,three-phase unbalance, voltage
fluctuation transient change and voltage drop etc.
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
13
Barcelona 12-15 May 2003
Thank you
Zhumei MIAO China Session 3 – Block 1.4 – Question Z
14