Solar PV/DG Grid Tied Inverter Testing
AC & DC Regenerative Test Equipment for Solar PV/DG Grid Tied Inverter Testing
Solar Photo-voltaic (PV) and Distributed generation (DG) systems convert DC from renewable-energy capture devices (wind/solar) or energy storage devices (battery/fuel-cell) into AC power. Many systems with energy storage are bi-directional allowing AC power to be stored as DC energy until it is needed. Some of these products are able to intentionally island for becoming micro grids or providing critical power (UPS) making AC power available especially in remote locations. Solar PV/DG grid tied inverter testing is necessary as all of these applications must comply with multiple regulatory standards (IEEE/UL/NEC/etc.) in addition to being efficient, reliable, and meeting the product’s performance expectations.
NH Research, Inc. (NHR) provides test equipment for PV/DG grid tied inverter testing (Fig. 1) which can simulate the utility connection as well as energy storage devices. For example, the 9410 Grid-Simulator is used to verify product AC performance while a 9200/9300 Series Test System may be used to emulate any energy storage system. This combination is a complete solution to verify product performance and ensure compliance with IEEE 1547, UL 1741, and similar grid-tied standards around the globe.
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AC & DC Regenerative Test Equipment
AC & DC Regenerative
The NHR 9410 Grid Simulator can provide a 1Φ, 2Φ, or 3Φ simulated utility connection while allowing per-phase controls for amplitude, wave shape and the relative to a phase angle relationship. These features allow testing any number of AC conditions including phase imbalance (in voltage and/or phase angle relationship), voltage sag, frequency changes and harmonic injection. The included measurement system eliminates the need for additional power meters, DMMs, oscilloscopes, or spectrum analyzers. The 9200 Battery Test System includes a charge, a discharge and state of the art battery emulation mode which allows for testing of a real battery or to electronically-emulate a battery. Using battery emulation replaces the need to use a real battery thereby eliminating risks associated with a battery failure, even those caused by a unit-under-test (UUT) failure. Additionally, battery emulation dramatically reduces testing time, provides highly repeatable test results, and creates a safer test environment. Eliminate operator error and environmental variables such as battery temperature or aging, to achieve precise results.