secondary system optimization

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Technologies of future substation –d t hit t secondary system architecture

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Secondary architecture

The Overall Framework

Substation Secondary System Optimization

Substation Network Architecture

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Feature in the future:• Platform（building （ g

logical, physical platform）• The full data sharing• Reasonable distribution

of function modulesCompatibility for future• Compatibility for future demand

• Based on current system• Optimize architecture

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Optimize architecture• Support secondary system integration





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Secondary System Optimization

• Divided two planes (Control and Monitoring)：• Dispatching and monitoring planeDispatching and monitoring plane

- The real-time requirements: Quasi real time system- Control direction: active control, strong plan, human computer Co t o d ect o act e co t o , st o g p a , u a co pute

interaction

• Emergency control planeEmergency control plane- The real-time requirements: Hard real time system- Control direction: passive control, closed-loop control, p , p ,

contingency

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• The optimization and integration thought：• Basic: data steam control stream data quality• Basic: data steam, control stream, data quality

• Goal: To improve the performance , simplify the equipment

• Principle: IED integration in same plane between bays and application

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• The optimization and integration in station level• Substation business data fusionSubstation business data fusion• Full data share• Advanced application software of power systemd a ced app cat o so t a e o po e syste

- Dispatching sequence control

- VQC in substation

- ……

• Interaction with dispatch centre- Unify the model for IEC61850 and IEC61970- Maintenance of model and graphic

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• The optimization and integration in station level• Smart gatewaySmart gateway

- Data share: BCU, protection, power meter, PMU, online monitoring of primary equipmento to g o p a y equ p e t

- Data model maintenance: IEC61850 to IEC61970 CIM- Graphics maintenance: Dispatching centre use the graphics p p g g p

done in substation HMI.

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Station level

Integration

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• The optimization and integration in bay level• Bay control unitBay control unit

- data acquisition: same sample source for BCU, power meter, PMU. Combine function to one IED.U Co b e u ct o to o e

- Data forward to station level,- Dispatching control plane:p g p

Passive control: to operate primary equipmentActive control: AVR,VQC ,sequence control

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• Security and stability control

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• Regional protection and control system

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Network–in substation

• More reliable and simple architecture in planning ……• HSR（High-Availability Seamless Ring）：No networkHSR（High Availability Seamless Ring）：No network

storm risk；• PRP（Parallel Redundancy Protocol）：at link layer, No （ a a e edu da cy otoco ） at aye , o

occupation of IED’s CPU；

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• HSR+PRP：• Face to bay，no external influence to communication inter-bay

Reliable redundance• Reliable redundance• Save ethernet switch：for 220kv typical substation: 16 vs 44

switchs

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• Network traffic control technology of IED：• SV+GOOSE < 100M

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• Network traffic control technology of IED：• SV+GOOSE > 100M, maybe IED1 GOOSE port net storm happeny p pp• Important SV data is dropped

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• Network traffic control technology of IED：• SV+GOOSE > 100M , maybe IED1 GOOSE port net storm happeny p pp• GOOSE data is dropped by traffic control module in switch before

output

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Network – Inter substation

• Network inter substation• Stability control system（special 2M point to point vs ethernet）• Stability control system（special 2M point to point vs ethernet）

• Area Protection and Control system）

P t ti d t l WAN Di t hi d t t k• Protection and control WAN vs Dispatching data network

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Network–inter substation

• WAN framework• Extend of process level data network• Extend of process level data network

• Peer to peer communication inter substation

C fi ti St d di ti f t bilit t t ti• Configuration Standardization for stability system, area protection and control system

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secondary system optimization

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