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Elements and Performance Criteria
Range Statement
Performance Evidence
Knowledge Evidence
Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of: |
PV power systems design principles, including:site survey encompassing:declination angle, reflectance, sunshine hours, extra-terrestrial irradiationenergy efficiency techniques relevant for domestic dwelling and commercial premises to reduce the electrical energy demandenergy efficient initiatives that could be implemented by the site ownerassessing WHS/OHS risks when working on a particular sitesolar access for the siteshading and estimates of its effect on the systemsolar resource for the siteavailable area for the solar arrayroof is suitable for mounting the arraymodules mounted on the roofswitchboard or distribution board is located for connecting the output of inverterarray junction box (if required) and location of inverter cabling route and estimates of the lengths of the cable runsmonitoring panels or screens and determining a suitable location with the site ownerPV arrays selection encompassing:selection and sizing of PV array for a grid-connected inverter system, based on annual energy demand, budget constraints, architectural constraints or limitations on available inverter sizesdetermining the minimum and maximum number of PV modules in a string for the specified voltagesystem components selection encompassing:balance of the system components, including cabling, circuit protection and isolation equipment for a grid-connected PV systemenergy yield, specific energy yield and performance ratio for systemschematic diagrams of common grid-connected inverter circuit configurations, including metering arrangements, isolation and connection with respect to residual circuit devices (RCDs)major installation details for a proposed grid-connected inverter system, based on the requirements set out in AS/NZS 4777 Grid connection of energy systems via inverters and AS/NZS 5033 Installation and safety requirements for photovoltaic (PV) arraysother design considerations encompassing:major non-technical considerations impacting on the design, installation and operation of grid-connected PV systems, including economic, financial, contractual, institutional, legislative and regulatorycalculation of the annual reduction in greenhouse gas emissions achieved by a given PV power system at a given locationinverters encompassing:types of inverters used in grid connected systemsAustralian Standard symbol for a low voltage (LV) inverterthe basic function of an invertersimple block diagram of a typical inverter used in grid-connected systeminverter operation encompassing:the basic principle of operation of a single phase inverter (using switch analogue)the operation of an inverter bridge and half-bridge configurationoperation of a FET inverterconnection of a grid inverter and measurement of the inverter parameters for various loadsinverter characteristics encompassing:the characteristics which distinguish inverters suitable for grid-connected PV array application from standard invertersusing waveform diagrams, the function of PWM techniques in square wave, modified square wave and synthesised sine wave invertersoutput voltage waveforms for square wave, modified square wave and synthesized sine wave inverters showing typical voltages and periodic timesthe six (6) essential inverter specificationsPV grid-connected system operation encompassing:block diagram of a PV grid-connected systemoperation of grid interactive PV systems, including synchronisation, safety feature, power flow control, passive and active anti-islanding, and metered energy for systemsschematic diagrams of common grid-connected inverter circuit configurations, including metering arrangements, isolation and connection with respect to RCDs in accordance with AS/NZS 4777.1 Grid connection of energy systems via inverters - Installation requirementsgrid-connected inverter selection encompassing:operating window of the inverter for the expected minimum and maximum effective cell temperaturesselection of an inverter rating with respect to the output power of the array/smajor installation requirements for all system components which will ensure correct operation, long life, safety and ease of maintenance consistent with AS/NZS 4509 Stand-alone power systems, AS 4086.2 Secondary batteries for use with stand-alone power systems - Installation and maintenance, AS/NZS 3000 and relevant WHS/OHS guidelinesselection of a suitable location for the PV array, inverter and other components, at a given installation site in accordance with AS 2676.2 Guide to the installation, maintenance, testing and replacement of secondary batteries in buildings - Sealed cells and AS 3011.2 Electrical installations - Secondary batteries installed in buildings Sealed cells, and the considerations given in AS/NZS4509 Stand-alone power systems and AS 4086.2 Secondary batteries for use with stand-alone power systems - Installation and maintenancetypical installation configurations for grid connection of energy systems via invertersfunction and operation of a grid protection device as specified in AS/NZS 4777 Grid connection of energy systems via inverters draft array wiring plan for series connected modules to minimise power loss due to shading at a particular siteinstallation requirements for a grid connected systemlabelling and signage requirements for switchboards supplied with power from grid connected inverters, as set out in AS/NZS 4777.1 Grid connection of energy systems via inverters Installation requirementsthe additional requirements for UPS systems as specified in AS/NZS 4777.1 Grid connection of energy systems via inverters - Installation requirementsrelevant manufacturer specificationsrelevant risk mitigation processesrelevant WHS/OHS legislated requirementsrelevant workplace documentationrelevant workplace policies and proceduresbudgeting methodsdesign briefsgrid systemshybrid power systemsquality assurance requirements. |