Seismic Decision Research and Seismic Decision Research and Function Assessment on Function Assessment on Power Supply System Power Supply System

Chunguang Liu, Xing Jin

Institute of Engineering Mechanics(IEM), CSBE-mail: lcgiem@163.com

1. Seismic Disaster of Power Supply System

2. Regulations on Power Supply System

3. Seismic Decision Research on Power

Supply System

4. Seismic Function Research on Power

Supply System

5. Example

6. Discussion and Conclusion

ContentsContents

Dam

age of Pow

er S

up

ply S

ystem

2. Regulations on Power Supply System

• Storage battery should set fence protection because storage battery inclines easily and current halt. Fence protection measures should be set particularly in big aquarium-like storage battery and outlet of storage battery should adopt soft connection way.

•Various high voltage electrical equipment with electromagnetic type, such as breaker, separation earthquake switch, current mutual inductance equipment, voltage mutual inductance equipment, Lightning arresters and brace insulator should be seamed or connected firmly by bolts with basis, in case of inclining in earthquake.

•Other regulations of civil structures and electric facilities.

(a) LW6-110 (left) LCWB-110(right)

(b) JDCF-220 (left) GW4-220(right)

3. Seismic Decision Research on Power Supply System

.Steps of Seismic Response Plan on Power Supply

System

.Levels of Seismic Response on Power Supply

System

. Emergency Decision Response on Power Supply

System

Steps of Seismic Decision

Ⅰ To fast determine seismic source parameters.

Ⅱ To fast estimate economy losses, injured and death.

The population by seismic disaster prediction method.

Ⅲ to determine the levels of earthquake emergency response.

Ⅳ The rescue team, specialist team to earthquake site .• Further justify seismic activity trend in the future• Evaluate economy losses and the numbers of death and

injured

Ⅴ To take other emergency actions.

Levels of Seismic Decision

. While general destructive earthquake happened the condition of

seismic decision is: 5.0≤M<6.5, there are some deaths and

economy loss.•While seriously destructive earthquake happened the condition

of seismic decision is: 6.5≤M<7.0, there are death population

more than 200~1000.•While the most seriously destructive earthquake happened the

condition of seismic decision is: M≥7.0, there are death

population more than 1000.

Seismic Decision Response(1)

. Emergency defense system in per-earthquake

. To draw up emergency measure

. To found organization of precaution

. To distribute and manage emergency materials

. To reinforce the response capability of

emergency response

Seismic Decision Response(2)

. Emergency Measurements in Earthquake

. Preparation work

. To carry out emergency plan

. To rescue damage facilities

Seismic Decision Response(3)

. Recovery and reconstruction in post-earthquake

. Directing rescue action

. Recovery and reconstruction of power supply

system

Table Function damage degree of electric supply system

Earthquakedamage degree

System function damage procedure

Ⅰ degreeAccident can be eliminated in time, electric supply function hardlyinfluenced, all electric supply service scope are normal in the sameday.

Ⅱ degree

The power damage is less than 20% of transformer in the scope ofelectric supply service, no more than 10% place was stopped power–supply in 2-3 days, the electric supply can be returned to normal inone week.

Ⅲ degree

The power damage is less than 50% of transformer, in the scope ofelectric supply service no more than 30% place was stopped power–supply in less than 10 days, after being rush repaired, the power–supply can be returned to normal in one month.

Ⅳ degree

The power damage is more than 50% of transformer in the scope ofpower supply service, more than 30% place was stopped powersupply in more than 10 days, though being rush-repaired, the powersupply will be returned to normal in months or longer time.

4. Seismic Function Research on Power Supply System

(1) Seismic Hazard Analysis of Power

Supply System

• Determination of Potential Seismic Source

• Evaluation of Seismic Hazard

• Seismic Microzonation

(2) Seismic Damage Prediction on Power Supply System

• Seismic Vulnerability Analysis of Facilities

• Seismic Vulnerability Analysis of Civil

Structure

• Network Analysis

• Direct Disaster Loss Assessment

• Indirect Disaster Loss Assessment

Function Analysis of Power Supply System

. Newton -Raphson method is employed to study power

equation.

. Function Index is defined as q.

. Function Flow Chart Analysis.

In a transmission network, the capability of the L lines for transporting electric power is accounted for in the admittance matrix Y of the network (N*N complex matrix) which is assembled considering the state of the lines, as follows:

Where yLp,q=longitudinal admittance of line p,q; yT

p,q=transversal admittance of line p,q; Yp,q=p,q element of Y matrix.  

Function Analysis (1)

q

Tqp

q

Lqppp

yyY

2,

,,

. Monte Carlo method is employed to studied network connectivity mode of power supply system.

.According to some paper, Newton -Raphson method is employed to studied load flow of power supply system. abnormal damage condition of voltage is as following:

Where the parameter depends on the type of transformers in the node.

The global performance index is proposed as following:

Function Analysis (2)

base

damagebase

V

VV

Where q(c) is global quality index, pr(c) is real part of the electric power in condition c, is modulus of the voltage in condition c, T(V) is some function, d is demand node, c is current condition, oc is reference condition.

Function Analysis (3)

ddr

d d

dddr

ocP

VTocVocVcV

cP

cq)(

)()(

)()(1)(

)(

)(cVd

Function Flow Chart Analysis

Load Flow Analysis

Evaluation Function Failure of Power Supply System

Initial Data

Load flow Analysis of Initial Electric Network Model

Evaluation of Civil Structural Damage of the Model

Connectivity Analysis by Fuzzy Mathematics Theory

Find Nodes of Connected and Disconnected

End

5. Example

• Seismic Damage Prediction of Power Facilities

• Seismic Damage Prediction of Civil Structures

• Function Damage Degree Evaluation of Power

Supply System

Function Damage degree of Power Supply System

. Major electrical power failure can be caused by disconnectivity and abnormal load flow in a power transmission network.

. Disconnectivity would be occurred primarily through civil structural damage and damage of the equipment, whereas abnormal power flow could result from power imbalance, abnormal voltage, or operational power interruption.

. Power supply network system is studied by load flow analysis and net linked probability analysis in the paper.

. Some meaning seismic decision ideas have been gotten.

6. Discussion and conclusion

Thank You !