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The STEVAL-ISV003V1 is a demonstration board which implements the microinverter concept and is designed to optimize the power production of each single solar panel by means of DC/AC conversion. The conversion system is capable of both grid synchronization and Maximum Power Point Tracking (MPPT) thanks to the use of an advanced control algorithm implemented in the 32-bit STM32 microcontroller. The MPPT function is based on the perturb and observe (P & O) concept which seeks the best operating point of the panel, thus maximizing the energy produced under any environmental condition. The grid synchronization algorithm has the advantage over standard solutions of a decoupled control of active and reactive power. The STEVAL-ISV003V1 demonstration board uses a high-frequency (HF) isolated DC/DC converter with interleaved current and an optimized full-bridge DC/AC inverter. The typical solar panel voltage is first stepped up to about 400 V and then converted into AC to create a sinusoidal output.
An LED display provides a user-friendly interface for the end user which allows monitoring and/or modifying some of the main operating parameters. Two modes of operation are available and can be selected to allow either open-loop operation or closed-loop operation in synchronization with the grid.
In open-loop mode the sinusoidal reference is created internally by means of a standard lookup table, while in closed-loop mode, a sinusoidal voltage feedback, proportional to the grid voltage, is used. The system can be connected to either a 50 Hz or 60 Hz network, depending on local requirements. Finally, the RS-232 interface can be used for serial data transfer of specified voltage, current and current signals.
Features:
250 W power capability
Input voltage range from 18 V to 45 V
Output voltage Vout= 230Vac 50Hz -240Vac 60Hz
Grid connection algorithm and MPPT capability
MPPT efficiency (99%)
Decoupled control of active and reactive power
Overcurrent and anti-islanding protection
RS-232 for communication
Galvanic isolation between the panel and the grid
Manufacturer | STMicroelectronics |
---|---|
Category | AC/DC and DC/DC Conversion |
Sub-Category | DC/AC Inverter |
Eval Board Part Number | 497-12941-ND |
Eval Board Supplier | STMicroelectronics |
Eval Board |
Board not Stocked
|
Output Power |
250 W
|
Voltage Out @ Frequency |
110 ~ 240 V @ 50/60 Hz
|
Voltage In |
18 ~ 45 V
|
Features |
Anti-Islanding Protection
Grid Connectable Over Current Protection |
Efficiency @ Conditions |
>95%, 20 ~ 40V in, 380V @ 75 ~ 250 W
>93%, 380V in, 240 VAC @ 75 ~ 250 W |
Component Count + Extras |
342 + 16
|
Switching Frequency |
17 kHz
35 kHz |
Design Author |
STMicroelectronics
|
Application / Target Market | |
Main I.C. Base Part |
STM32F103ZE
|
Date Created By Author | |
Date Added To Library | 2012-06 |
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Orders are typically delivered to China within 4 days depending on location.
Free delivery to China on orders of $100 USD or more. A delivery charge of $30 USD will be billed on all orders less than $100 USD.
CPT if prepay and add, FCA Thief River Falls if billing to a shipper account as defined by INCOTERMS 2010
Customer is responsible for all applicable duties, tariffs, brokerage fees and taxes
Credit account for qualified institutions and businesses
Payment in Advance by Wire Transfer
More Products From Fully Authorized Partners
Average Time to Ship 1-3 Days, extra ship charges may apply. Please see product page, cart, and checkout for actual ship speed.
Incoterms: CPT (Duty, customs, and applicable VAT/Tax due at time of delivery)
For more information visit Help & Support
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