New Analog IC Technology Support Safety, High Efficiency and High Reliability of Today's PV Solar System Delivering MORE Together • Shanghai International Power Electronics Innovation Forum, 21, 2012 Picture: 53MW solar park, Lieberose, Germany Solar Magic
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1998 Strategic Communications Plan - Texas Instruments
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New Analog IC Technology Support Safety, High Efficiency and High Reliability
of Today's PV Solar System
Delivering MORE Together
• Shanghai International Power Electronics Innovation Forum, 21, 2012
Picture: 53MW solar park, Lieberose, Germany
Solar Magic
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Agenda
• Challenges of Today’s PV Solar Industry Development
• PV Solar Market Ask for Safe System, Arc Detection
• Distributed MPPT Increase Solar Power Harvest, DC/DC Optimizer
• New SBD Raise the Reliability of PV Panel
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Big Trend – the 3rd Wave of Electronics
• 1st Wave - Essential Electric Society
– Home appliances, Ice box, Washer, TV, etc.
– Wired telecom
– Incentive to more electrical energy consumption
• 2nd Wave - Informative and Network Society
– PCs are every where and
– Mobile telecom & Internet access
– Encourage energy conservation
• 3rd Wave – Smart & Environment Protection Society
– WW population up to 7B (China 1.6B), a new challenge to energy resource
– Solar Power is the best solution among all the renewable energy
– PV Solar bring in new opportunities for all the industry including ICs
Hi Growth Rate, Huge Market Potential
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AP and China Solar Installation Market is Soaring
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PV System & Ecosystem
Smart
Jbox
SM
PCBa
SM Chip
Set
TI solar ref
•Safety is a strong demand of future PV solar systems
•High total system efficiency bring attention from $/Wp to $/KWh of ROI
•Reliability is system engineering over total PV system
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New 2011 NEC Arc-Fault Requirements for PV Systems
Article 690.11 Mandate
• Written to detect and interrupt “series” arc-faults in
modules, connections, wiring, and other
components in a PV System
• Requires inverters, charge controllers or other
devices in the arcing circuit to be disconnected and
disabled
• Requires manual resets and reconnects once an
arc is detected and fixed
• Functionality tested according to UL 1699B
• TI-SVA is full member of the UL workgroup
defining this standard
The new 2011 NEC
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Arc Detection Solution
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• SM73201 Arc-Detection compliant with NEC requirements
• Detects series, parallel and ground fault arcs
• Check frequency for arc detection up to 20Hz.
• Arc detect signal can be output as a digital output or over UART or
wireless signal.
• Designed to operate in the presence of noise due to switching power electronics (inverters, power optimizers, etc…). Special algorithms designed to recognize these signals and avoid false triggers.
• Tested for all major inverters/PV technologies
• Available for integration into
– Smart combiner box, Decentralized PVI (up to 15 A)
– Multi-string Option
– Self-Test Feature
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Arc Detection Principle Block Diagram
DC
Po
wer
Lin
e
Electrical Parameters SM73201-ARC-EV
String current 15A
Multi-string Option Yes
DC Bus Voltage 1000V (3000 V iso)
Arc Detection Time <150 ms
The arc detection signal
can be used in various
configurations to trigger
the shut-down of the
affected module or string:
-Electro-mechanical
string shut down
- Inverter based shut-
down
Multi-band
Dynamic
Filtering
DSP
SM73307
SM73308C2000SM73201
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Arc Detection Main Features
• Check frequency for arc detection up to 20Hz.
• Arc detect signal can be output as a digital output or over UART or
wireless signal.
• Designed to detect parallel and serial arcs
• Designed to operate in the presence of noise due to switching power
electronics (inverters, power optimizers, etc…). Special algorithms
designed to recognize these signals and avoid false triggers.
• The arc detection circuitry has been designed to pass the draft standard
for arc detection being developed by the UL1699B working group.
• Arc detect reference design operates in single and multi string