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Appendix A Technical Specification Photovoltaics | Photovoltaic System | Photovoltaics
pap_ST3.2_task_13_Sept_2011
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Pvrea Renewable Energy Rebate Form 4-15-2010[1]
ANNEX A TECHNICAL SPECIFICATION FOR SUPPLY TO THE CREATION OF PHOTOVOLTAIC conne cted to a power ratings between 20 and 50 kWp
PURPOSE The purpose of this specif ication is to provide general guidelines and rules to be observed for production of PV systems rated not less than 20 kW eg not more than 50 kWp, intended to op erate in parallel to the electric distribution network and connected to a user, downstream of the comprehensive system. This document, therefore, is not exhaust ive for the purposes of any expectation of the works of supply, installation and connection to the system in question. 1. DEFINITIONS a. A photovoltaic system i s producing electricity by direct conversion of sunlight into electricity (photo voltaic effect), it is the photovoltaic generator and the band conversion b. the photovoltaic installation is the set of photovoltaic modules connected in serie s / parallel to obtain the voltage / current desired c. the rated (or maximum, o r peak, or plate) of the photovoltaic generator is determined by the power sum o f nominal power (or maximum, or peak or plate) of each module forms the photovol taic generator, measured in terms standard d. group conversion is the electronic equipment that converts direct current (supplied by photovoltaic generator) int o AC for connection to the network e. the distributor is the entity providing th e service distribution and sale of electricity users f. the user is the person o r entity holding a contract to supply electricity. 2. REGULATIONS AND LAWS OF REFERENCE legislation and laws to be respected refere nce for the design and implementation of photovoltaic systems are: IEC 64-8: Ele ctrical users rated voltage not exceeding 1000 V ac and 1500 V dc; CEI 11-20: po wer generation plants and UPS systems connected to networks I and II category; C EI EN 60904-1 (IEC 82-1): Photovoltaic Devices Part 1: Measurement of photovolta ic current-voltage characteristics; 1 CEI EN 60904-2 (IEC 82-2): Photovoltaic Devices - Part 2: Requirements for refer ence solar cells, CEI EN 60904-3 (IEC 82-3): Photovoltaic devices - Part 3: Prin ciples of measurement for solar solar spectral irradiance for ground use and ref erence; CEI EN 61727 (IEC 82-9): Photovoltaic (PV) - Characteristics of the inte rface connecting to the network; CEI EN 61215 (IEC 82-8): silicon photovoltaic m odules Crystalline land. Qualification of the project type, CEI EN 61646 (IEC 82 -12): photovoltaic modules (PV) thin-film terrestrial - Qualification and approv al of the project type, CEI EN 50380 (IEC 82-22): Information sheets and data pl ate for photovoltaic modules, CEI 82-25: Guide the development of photovoltaic p ower generation systems connected to the electricity networks of medium and low voltage, CEI EN 62093 (IEC 82-24): Components of PV systems - excluding modules (BOS ) as a project in natural environmental conditions, (CEI ASSOSOLARE), CEI E N 61000-3-2 (IEC 110-31): Electromagnetic compatibility (EMC) - Part 3: Limits S ection 2: Limits for harmonic current emissions ( equipment input current <= 16 A per phase), IEC EN 60555-1: Disturbances in supply systems caused by household appliances and similar electrical equipment - Part 1: Definitions, CEI EN 60439 (IEC 17-13): Equipment assemblies and protection for low voltage operation (ACS ) series consists of: CEI EN 60439-1 (CEI 17-13/1) Equipment subject to standard tests (AS) and equipment partially subject to standard tests ( ANS), CEI EN 604 39-2 (CEI 17-13/2): Particular requirements for busbars, CEI EN 60439-3 (CEI 1713/3): Particular requirements for assemblies for protection and maneuver design ed to be installed in places where unskilled persons have access for their use Distribution boards (ASD), CEI EN 60445 (IEC 16-2): Basic and safety principles for man-machine interface, marking and identification - Identification of termi nals and equipment and the wire ends and designated general rules for an alphanu meric system, CEI EN 60529 (IEC 70-1): Degrees of protection provided by enclosu res (IP code), CEI EN 60099-1 (IEC 37-1): arresters - Part 1: Download a nonline ar resistors with spark gaps for AC systems, CEI 20-19: Rubber insulated cables of rated voltage not exceeding 450/750 V; 2 CEI 20-20: Polyvinyl chloride insulated cables of rated voltages up to and inclu
ding 450/750 V, CEI EN 62305 (IEC 81-10): Lightning protection range includes: I EC 62305-1 (CEI 81-10/1 ): General Principles, IEC 62305-2 (CEI 81-10/2): Risk a ssessment; IEC 62305-3 (CEI 81-10/3): Material damage to structures and danger t o people, CEI EN 62305 -4 (CEI 81-10/4): Electrical and electronic internal stru ctures; IEC 81-3: Mean number of lightning strikes to earth per year and per squ are kilometer; CEI 0-2: Guidance for the definition of the documentation Project for electrical installations; CEI 0-3: Guidance for completing the declaration of conformity and its annexes to the Law 46/1990; UNI 10349: Heating and cooling buildings. Climatic data; CEI EN 61724 (IEC 82-15): Survey of performance of ph otovoltaic systems. Guidelines for measurement, exchange and analysis of data; I EC 60364-7-712 Electrical installations of buildings - Part 7-712: Requirements for special installations or locations Solar photovoltaic (PV) power supply syst ems. • • Presidential Decree 547/55 and Legislative Decree no. 626/94 and subsequent amen dments, safety and prevention of occupational accidents, the Law 46/90 and Decre e 447/91 (the Regulation implementing Law 46/90) and amended, for electrical saf ety. Under the system of exchange of electricity, the regulatory deliberation No 6.28 Authority for Electricity and Gas February 10, 2006: "Conditions of the project 's technical and service metering of electricity from plants powered by renewabl e power rating not exceeding 20 kW under Article 6 of Legislative Decree no. Dec ember 29, 2003, No 387. The references above may not be exhaustive. Additional l aws, regulations and resolutions on the subject, if applicable at time of public ation of this specification, although not expressly mentioned, are considered ap plicable. If the above technical standards are changed or updated, apply the mos t recent standards. Will also apply mutatis mutandis to the rules listed above, technical documents issued by the electricity distribution companies bearing imp lementing provisions for the connection of photovoltaic systems connected to the mains. 3. DIMENSIONS, PERFORMANCE AND GUARANTEES 3 The amount of electrical power producible must be calculated on the basis of rad iometric data cited in the standard UNI 10349 and assuming, as average annual pl ant operating efficiency, 75% nominal efficiency of the photovoltaic generator. The nominal efficiency of the photovoltaic generator is given numerically, in pr actice, the ratio of the rated generator (in kW) and its surface (in m² and unde rstanding coma sum of the surface of the modules). If the conditions and use of the photovoltaic plant is such that it can be transferred to network a power gre ater than that committed by contract of sale, you will need to adjust the forwar d power committed. Moreover, the system must be designed to: • • DC power hand over 85% of rated output of the photovoltaic generator, referring to the specific irradiation conditions, active power, side AC greater than 90% o f the side DC power (efficiency of the conversion); and, therefore, an active power, AC side, more than 75% of rated output of the p hotovoltaic system, referring to the particular irradiation conditions. The enti re system must have a guarantee of at least two years to date from testing of th e facility, while the PV modules must have a guarantee of at least 12 years. 4. FEATURES The photovoltaic generator of the plant must be obtained by connecting in parallel an appropriate number of strings. Each string, cut and fitted with b locking diode must be formed by a series of individual photovoltaic modules. Eac h module must be equipped with bypass diodes. The parallel strings must be provi
ded with overvoltage protection and a suitable switch for connection to the grou p of conversion. Particular attention should be paid to the design and construct ion of electrical panel containing these components, this addition to comply wit h existing rules, must have a degree of protection appropriate to the environmen tal characteristics of its installation site. The photovoltaic generator should preferably be managed as IT system, ie no pole connected to ground.The group of conversion must be fit for the transfer of power from the photovoltaic generato r to the network, regulatory compliance and technical safety standards. The valu es of voltage and input current of the conversion must be compatible with those of the photovoltaic generator, while the values of voltage and frequency output must be compatible with the network which is connected to the system. The group conversion should preferably be based on forced commutated inverter via PWM, mus t be free of clock and / or internal reference, and should be able to operate fu lly automatically and to track the maximum power point (MPPT) the photovoltaic g enerator. Technical solutions than those suggested (and for the management of th e photovoltaic generator for the group of conversion) shall be adopted, subject to compliance with existing rules. The interface device, which act on the protec tions as provided by that CEI 11-20, will normally be integrated into the conver sion group. Those protections, however, must be accompanied by certification iss ued by a 4 accredited. The connection of the conversion to the electricity grid must be dow nstream of the overall network user. The system must also be equipped with a dev ice that displays (preferably with an electromechanical device) the amount of en ergy produced (cumulative) from the facility and their operating hours. For safe ty, if the network user or part of it is deemed unfit to bear the greater intens ity of current available (due to the contribution of the photovoltaic), the netw ork or part of it should be appropriately protected. 5. CHECK Technical-function al technical and functional verification is to verify the installation: • • • • • electrical continuity and connections between modules, the grounding of the mass es and unloaders, isolation of circuits from the masses and the proper functioni ng of the photovoltaic power generated in different conditions and in the manner provided by the group of conversion ( ON, OFF, power failure, etc.). the condit ion: CCP> Phnom 0.85 * * I / ISTC, where: o o o o CCP is the DC power (kW) measured at the output of the photovoltaic generator, w ith accuracy better than ± 2%; Phnom is the nominal power (kW) solar generator, I is the irradiance (W / m² ) measured in terms of modules, with accuracy better than ± 3%; ISTC, of 1000 W / m², is the radiation level at standard test condit ions; • • condition: Pca> 0.9 * CCP, where: Pca is the active power AC (kW) measured at th e output of the conversion of the current generated by PV modules into alternati ng current, with accuracy better than 2% ; the condition: Pca> 0.75 * * The Phno m / ISTC. The above checks should be made, work has been completed, the installer of the s ystem, which must be in possession of all the requirements of laws, and shall is sue a declaration (using the form attached), signed and signed all over, showing the results of testing and the date on which the above were made. 6. Documents must be issued and issued by the installer, the following documents:
• • • • • operating and maintenance, inclusive of the recommended schedule of maintenance operations, project executive version "as built", accompanied by sheets of mater ial installed; statement audits conducted and its outcome; declaration of compli ance under the law 46 / 90, article 1, letter a, guarantee certificates for the equipment installed. 5 Facsimile reporting STATEMENT OF FUNCTIONAL TESTING TECHNICIAN-Reference: photovoltaic system instal led at: _____________________________. The undersigned _________________, Enterp rise installer as the plant reference states that the nominal power plant in que stion is equal to _________ kW as the sum of nominal power module comprising the photovoltaic generator. Also claimed to have carried out the tests required for the specific delivery technique on _________, irradiation conditions in terms o f modules exceeding 700 W / m² and the temperature of ____ ° At this point, decl are they are satisfied with outcome C. positive • • • • • electrical continuity and connections between modules, the grounding of the mass es and unloaders, isolation of circuits from the masses;the proper functioning of the photovoltaic power generated in different conditions and in the manner pr ovided by the group conversion (power on, power off, power failure, etc.). the c ondition: CCP> Phnom 0.85 * * I / ISTC, where : o CCP is the power (kW) measured at the output of the photovoltaic generator, with precision better than 2%, or Phnom is the nominal power (in kW) of photovoltaic generator, or I is the irradi ance (W / m² ) measured in terms of modules, with accuracy better than 3%, or IS TC, that is 1000 W / m², irradiation under standard conditions; • • condition: Pca> 0.9 * CCP, where Pca is the active power (kW) measured at the ou tput of the conversion, with accuracy better than 2%, the condition: Pca> Phnom 0.75 * * I / ISTC. Or declares that, as regards checks on a. .....( following statement on tests), were found the following anomalies (description follows). Also stated that these measures have provided the following values: • • • = Pca CCP KW = __________ __________ ___________.W I = KW / m² 6 and that was used the following measuring equipment: (list follows). Finally dec lares that all the above is equivalent to truth. Data____________ Stamp and Firma_____________ 7
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