SD Renewables Testbed
The Intelligent Flow of Power.
A technical deep-dive into the experimental testbed validating our next-generation hybrid topology—proving that efficiency and flexibility can coexist.
Validating the Blueprint
The Core Objective of the Experimental Testbed
The primary goal of this experimental testbed is to simulate and assess the feasibility and stability of controlled power transfer within a utility-scale hybrid energy system. This system comprises solar PV generation and battery storage, where dynamic energy flows are intelligently routed.
By creating a downscaled yet representative environment, the testbed facilitates the validation of complex power sharing logic before deployment in large-scale systems, mitigating risks of grid violations or inefficiencies.
Hybrid Architecture Concept
The proposed system integrates two distinct yet complementary approaches: Conventional DC-coupling for efficient PV storage, and Reverse DC-coupling for flexible energy dispatch. This topology supports multiple critical power flow modes:
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Solar → Inverters → GridDirect dispatch of solar power to the grid via both inverters.
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Solar → BatteryCharging the battery directly from solar PV generation.
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Battery → Inverters → GridDischarging stored battery energy to support the grid or connected loads.
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Combined DispatchA combined scenario where solar power feeds the solar inverter while battery power supports the battery inverter simultaneously.
Small-Scale with Utility-Scale Purpose
Despite being constructed with 1kW inverters and a 24V battery, the testbed is meticulously designed to replicate the architecture and control behavior typical of utility-scale renewable power plants. In this scaled-down configuration:
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The solar inverter functions as a model for a grid-tied PV inverter in a commercial solar field.
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The battery inverter emulates a grid-connected Battery Energy Storage System (BESS).
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The DC-DC converters are crucial for modeling bi-directional DC transfer, a common feature in integrated hybrid systems.
(Refer to the figures for a visual overview of the system components and operational insights.)
System Components
The testbed integrates a comprehensive set of components designed to replicate the architecture and control behavior of utility-scale renewable power plants.
Inverters & Converters
The core of the power conversion system, designed for maximum flexibility.
- Inverters: 2 Soyu 1000W Inverters (Solar & Battery)
- DC-DC Converters: 2 Unidirectional DC-DC Converters (DPH-505)
Energy Storage & Control
High-performance battery and the central brain of the operation.
- Battery: 1 LiFePO4 Battery 24V 100Ah
- Sensors: PZEM-016, PZEM-017, and Victron SmartShunt
- Circuit Breakers: For protection and control
- SCADA Server: With Python control, Node-RED dashboard, and InfluxDB.
Operational Insights
The provided SCADA screenshots offer valuable insights into the dynamic power flows and control capabilities of the testbed under different operational scenarios.
