Document Name Wecc Solar Plant Dynamic Modeling Guidelines-Books Pdf

Document name WECC Solar Plant Dynamic Modeling Guidelines
29 Sep 2020 | 0 views | 0 downloads | 26 Pages | 565.57 KB

Share Pdf : Document Name Wecc Solar Plant Dynamic Modeling Guidelines

Download and Preview : Document Name Wecc Solar Plant Dynamic Modeling Guidelines

Report CopyRight/DMCA Form For : Document Name Wecc Solar Plant Dynamic Modeling Guidelines



Transcription

Western Electricity Coordinating Council, Modeling and Validation Work Group. WECC PV Power Plant, Dynamic Modeling Guide, Prepared by. WECC Renewable Energy Modeling Task Force, April 2014. 1 Introduction 3, 2 Background 3, 3 General Considerations for Dynamic Simulation of PV Plants 5. 3 1 Appropriate Models for Bulk System Simulations 5. 3 2 Load Flow Representation 5, 3 3 Implications of Collector System Equivalencing 6.
3 4 Active and Reactive Power Control 6, 3 5 Fault Ride Through and Representation of Protection Limits 6. 3 6 Model parameters 7, 4 WECC Generic Models 7, 4 1 Technical Specifications for the WECC Generic Models 7. 4 2 WECC Generic Model for Large scale PV Plants 8. 4 2 1 Model Structure 8, 4 2 2 Model call 9, 4 2 3 Scaling for the PV plant size and reactive capability 10. 4 2 4 Volt Var controls options 11, 4 2 5 Active power control options 11. 4 2 6 Representation of Voltage and Frequency Protection 12. 4 2 7 Sample simulation results 12, 4 3 WECC Generic Model for Distributed and Small PV Plants 12.
4 3 1 Model Structure 12, 4 3 2 Model call 13, 4 3 3 Scaling for the PV plant size and reactive capability 14. 4 3 4 Volt Var Controls 14, 4 3 5 Active Power Controls 14. 4 3 6 Generation tripping 15, 4 3 7 Sample simulation results 15. 5 Summary 16, Appendix Detailed Model Description 17. 5 1 Renewable Energy Generator Converter Model REGC A 17. Description 17, Block Diagram 17, Parameters and Default Settings 18.
Internal Variables and Output Channels 18, 5 2 REEC B Renewable Energy Electrical Control Model for PV Plants 19. Description 19, Block Diagram 19, Parameters and sample settings 20. Internal variables and Output Channels 20, 5 3 REPC A Renewable Energy Plant Control Model 22. Description 22, Block Diagram 22, Parameters and sample settings 23. Internal Variables and Output Channels 24, Document Version Control 25.
1 Introduction, Grid connected photovoltaic PV systems cover a wide range of applications Most PV systems. are residential up to several kW and commercial scale up to several MW connected to. distribution networks However many PV systems are large generation facilities some. exceeding 100 MW and are connected to the transmission system NERC Reliability Standards. require that power flow and dynamics models be provided in accordance with regional. requirements and procedures Under the existing WECC modeling guidelines 1 all PV power. plants with aggregated capacity 20 MVA or larger must be modeled explicitly in power flow and. dynamics This means that these plants must not be load netted or modeled as negative load. Manufacturer specific dynamic models commonly provided for interconnection studies are not. adequate for regional planning For this application WECC requires the use of approved. models that are public non proprietary are available as standard library models and have been. tested and validated in accordance to WECC guidelines Approved models are listed in the. WECC Approved Dynamic Model List, This document is a guide for the application WECC PV power plant generic dynamic models. recently been adopted by WECC The user should always refer to module documentation. maintained by the simulation software vendor For additional technical details the user can. reference the WECC approved model specifications 2 Subject to some limitations and with. proper selection of model structure and parameters the models are suitable for representation of. large scale PV plants and distribution connected PV aggregated to a transmission bus Both PV. system models require explicit representation of the generation in the power flow model PV. power plant modeling will continue to be an area of active research Models will continue to. evolve with changes in technology and interconnection requirements Also PV power plants. model validation against reference data remains a challenge due to limited industry experience. 2 Background, Solar power plants are different than conventional power plants The interface to the grid is an. inverter see Figure 1 connected to a PV array, Figure 1 A topology commonly found in utility scale three phase PV inverters. WECC Data Preparation Procedural Manual for Power Flow Base Cases and Dynamic Stability Data WECC. System Review Work Group Approved March 27 2013, Model specifications are accessible from the WECC website in this folder.
Inverters are characterized by low short circuit current contribution lack of mechanical inertia. and high bandwidth fast controls A primary function of the inverter controls is to make the. most efficient use of available energy being produced by the PV array while ensuring that the. magnitude of AC current does not exceed the rating of the inverter PV plants do not have any. inherent inertial or frequency response capabilities. Figure 2 shows the topology of a large PV power plant Large PV plants typically have several. medium voltage radial feeders The PV inverters are connected to the feeders via step up. transformers with several inverters sharing one step up transformer Some plants designs. include capacitors or other reactive support systems that work in conjunction with the inverters. to meet reactive power capability and control requirements at the point of interconnection A. plant controller provides the power factor reference to the inverters 3 and plant level reactive. power support equipment if present The plant controller processes measurements at the point of. interconnection and commands issued from the fleet remote operations center or directly from. the transmission system operator, Figure 2 Typical PV Power Plant Topology. Much of the existing PV generation in WECC consists of small PV systems deployed in. customer premises connected directly to distribution service voltage These systems do not. typically have a plant controller and the inverter manages the grid interface Some PV systems. as large as 20 MW are connected directly to distribution substations using a dedicated medium. voltage feeder, Although not used commonly the plant controller could also provide active power to the inverters to prevent the. plant output from exceeding a certain limit, PV plants are considered non dispatchable because the energy source solar irradiance is. variable However reactive power is dispatchable within the capability of the inverters and. plant level reactive compensation, 3 General Considerations for Dynamic Simulation of PV Plants. 3 1 Appropriate Models for Bulk System Simulations. The WECC generic models were designed for transmission planning studies that involve a. complex network and a large set of generators loads and other dynamic components The. objective is to assess dynamic performance of the system particularly recovery dynamics. following grid side disturbances such as transmission level faults In this context WECC uses. positive sequence power flow and dynamic models that provide a good representation of. recovery dynamics using integration time steps of one quarter cycle This approach does not. allow for detailed representation of very fast controls and response to imbalanced disturbances It. should be noted that generic dynamic models for inverter based generator tend to produce a. short duration a cycle or shorter voltage spike at fault inception or clearing These spikes. should be ignored in most cases as they do not represent the performance of actual hardware. They are simply a consequence of the model s limited bandwidth integration time step and the. way current injection models interface with the network solution. 3 2 Power Flow Representation, The WECC generic dynamic models described in this guideline assume that the PV generators.
are represented explicitly in power flow representing a single large plant or the aggregated. output of multiple smaller plants connected to distribution systems For bulk system studies it is. impractical and unnecessary to model the collector system network inside the plant to the level. of detail shown in Figure 2 In accordance with the WECC PV Plant Power Flow Modeling. Guide 4 PV power plants must be represented by a simplified system consisting of one or more. equivalent generators and unit transformers equivalent collector system substation transformer. and plant level reactive support system if present For most PV plants the single generator. equivalent model shown in Figure 3 is adequate for bulk level power flow and dynamic. simulations The WECC PV Plant Power Flow Modeling Guide also describes a methodology to. derive the parameters for the single machine representation including a way to derive the. collector system equivalent from design data, WECC Guide for Representation of Photovoltaic Systems in Large Scale Load Flow Simulations WECC. Renewable Energy Modeling Task Force Approved January 2011. Figure 3 Single Generator Equivalent Power Flow Representation for a PV Power Plant. Similarly it is impractical to represent the large number of PV systems connected to distribution. systems When it is necessary to study the effects of distributed PV generation in a given area. the aggregated PV generation could be represented at a suitable transmission node by an. equivalent generator preferably behind an equivalent station transformer and equivalent medium. voltage feeder The dynamic models suggested for distributed PV plants are simpler than the. dynamic models used for PV power plants, 3 3 Implications of Collector System Equivalencing. It is important that the equivalent impedance of the collector system be represented in dynamic. simulations Since PV systems typically extend over a large geographical area the electrical. impedance between the terminals of each PV system and the point of interconnection could be. significantly different leading to a diverse dynamic response It is not possible to capture this. level of detail with a single machine equivalent The same argument applies to situations where. multiple distributed PV systems are aggregated into an equivalent generator Therefore it. should be understood that the modeling approach provides an indication of the average response. of the inverters as opposed to the response of any particular inverter in the plant. 3 4 Active and Reactive Power Control, Average irradiance over a large PV plant can change appreciably during the span of a typical. dynamic simulation up to 30 seconds By default the WECC generic models assume a fixed. reference generator output in the solved power flow case Presently there is no provision for. incorporating simulation of irradiance variability in large scale system studies The generic. models do allow for the specification of active power control including ramp rate limits. frequency response and active reactive power priority during voltage dips Reactive power. capability and response characteristics are an important consideration in system studies A. variety of reactive power control modes can be implemented in a PV power plant Very large PV. systems typically control voltage at the point of interconnection Smaller plants are typically. operated in power factor control mode During a dynamic event the reactive power response is. the combined contribution of fast inverter response in cycles and slower supervisory control in. seconds via the plant controller, 3 5 Fault Ride Through and Representation of Protection Limits. An important part of a dynamic performance evaluation is whether the PV system will trip off. line for a given voltage or frequency disturbance The equivalent representation and simplified. dynamic models described here are not recommended for evaluation of fault ride through. Whether or not an inverter will ride through a voltage disturbance depends on the type of fault. and the magnitude of the remaining voltage at the inverter terminals The control actions that. affect the behavior of the inverter during the span of a short fault are generally not modeled in. detail in the generic dynamic models This limitation is acceptable because system studies focus. on the characteristics of the dynamic recovery rather than on system conditions during the fault. Considering that terminal voltage can vary significantly across the plant a single machine. representation has obvious limitations with respect to assessment of voltage ride through. 3 6 Model parameters, As with any other equipment appropriate parameters must be selected to represent the dynamic.
behavior of the corresponding PV plant Default parameters provided are intended only for. model testing and do not represent any particular project Consistent with established WECC. practice input from the plant operator and equipment manufacturer is required to correctly. parameterize the model 5 This is also true for the power flow representation. 4 WECC Generic Models, This section contains a general description of the WECC generic models based on REMTF. technical specifications approved by WECC The models are available as standard library. models in commercial simulation platforms used in WECC The purpose of this document is to. help model users understand the limitations of the models the model structure user selectable. options requirements for scaling the plant size and representation of protection settings. 4 1 Technical Specifications for the WECC Generic Models. The WECC generic models for PV plants are based on the following technical specifications. The models shall be non proprietary and accessible to transmission planners and grid. equivalent model shown in Figure is adequate for bulklevel power flow and 3 dynamic simulations The WECC PV Plant Power Flow Modeling Guide also describes a methodology to derive the parameters for the singlemachine represe ntation including a way to derive the collector system equivalent from design data

Related Books

Agile Architecture Roadmapping Carnegie Mellon University

Agile Architecture Roadmapping Carnegie Mellon University

Architecting the Time dimension Evolution Viewpoint Step 1 Identify events with architectural impact 27 Event When expected Impact type Impact Competitor releases next generation product Q4 2017 Business value Risk Our own product will be harder to sell if we do not match their new features which would cause us to lose revenue Microsoft

EDITAL DE ABERTURA DE INSCRI ES PROCE RA PREE NCHIMENTO

EDITAL DE ABERTURA DE INSCRI ES PROCE RA PREE NCHIMENTO

de inscri ional na s pela FU ato de Oliv Processo rimoramen a quem s grama sciplinar em eriatria ir rgica tomaterapia Humanos em e em Educa te r e Cl nica sciplinar em eriatria ica M dica pia Intensiva gia umana ia ia EST O P AO SERVIDOR Fone 50 l iamspe s E INSCRI TO DE VA REA DA SA DE ADMINI IDOR P blico Esta uisa CED

Aldeia de Santa Isabel

Aldeia de Santa Isabel

realizado que algu m acredite que ele pode ser rea lizado O futuro daqueles que acreditam na beleza de seus sonhos O sonho a satisfa o de que o dese jo se realize Jamais se pode sofrer antecipadamente devemos acreditar nos nossos sonhos nunca desistin do de lutar para os alcan ar A vida generosa para aqueles que acreditam nela Se pensar o destino do ser humano

aspectes b sics Marc conceptual i

aspectes b sics Marc conceptual i

D altra banda un fisiote rapeuta que utilitz s un sistema de rehabilitaci virtual en pacients amb dis La possibilitat que apareguin dificultats t cniques durant la sessi de ter pia i que el professional no s piga solucionar les L entrenament i coneixements t cnics necessaris per a utilitzar la tecnolo gia M s enll d aquests resultats tot sembla indicar que

RESUMO ABSTRACT

RESUMO ABSTRACT

to de diversas patologias Na Paralisia Cerebral a Fisiote rapia tem o intuito de inibir a atividade reflexa anormal para normalizar o t nus muscular atrav s de exerc cios de facilita o e inibi o que buscam a melhora da for a fle xibilidade e amplitude de movimento Al m desses a uti liza o de jogos eletr nicos como Nintendo Wii uma alternativa que pode tornar o

CONCEITO NEUROEVOLUTIVO EM PACIENTES COM S NDROME DE DOWN

CONCEITO NEUROEVOLUTIVO EM PACIENTES COM S NDROME DE DOWN

ras de S ndrome de Down que rea lizam a equotera pia ou fisioterapia convencional Transversal Longitudinal A equoterapia e a fisioterapia con vencional influenciaram na aquisi o de marcos motores em portadores de S ndrome de Down em ambos os grupos houve melhora nesse aspecto sendo mais evidente no grupo da fisiote rapia Morais et al

Noticiari de Fisioter pia

Noticiari de Fisioter pia

Noticiari de Fisioter pia N m 31 pies manuals El plantejament de la campanya gira entorn a inicialment fer la promoci dins del nostre col lectiu dis tribuint el material en tre els col legiats cen tres de salut centres de Fisioter pia per posteriorment difon dre a nivell de mitjans de comunicaci entre professionals de ci n

Filtri Olio Stradali Moto Modello Anno Codice

Filtri Olio Stradali Moto Modello Anno Codice

Honda Motorcycle 125 VT125 C C2 Shadow 99 04 140002 Honda Motorcycle 125 XL125 V Varadero 39822 140002 Honda Motorcycle 250 AX1 140001 Honda Motorcycle 250 CB250 N NA T 78 82 140000 Honda Motorcycle 250 CB250 NDX B NB 78 82 140000 Honda Motorcycle 250 CB250 NB NDX B Super Dream 81 85 140000 Honda Motorcycle 250 CB250 RSA MD02 80 83 140000 Honda Motorcycle 250 CB250 RSD C L 82 84 140000 Honda

EXHAUST PIPE GASKETS HONDA SHOP EQUIPMENT TOOLS KAWASAKI

EXHAUST PIPE GASKETS HONDA SHOP EQUIPMENT TOOLS KAWASAKI

EXHAUST PIPE GASKETS HONDA Street Application Year Exh Pipe Gskt pk 10 TG50 85 86 16 5976 PC800 Pacific Coast 89 10 16 1843 VFR800FI Interceptor 98 01 16 5976 VFR800 A 02 09 16 5976 VT800C Shadow 1987 16 1843 CB900C Custom 80 82 16 5977 CB900F Super Sport 81 82 16 5977 CB900F Super Sport 02 07 16 6061 CBR900RR 93 99 16 6061 CBR929RE 2001 16 5977 CBR929RR 00 01 16 5977 CBR954RR 02 03 16

PC800 vs Deauville650 Scaleway

PC800 vs Deauville650 Scaleway

Pacific Coast 800 Deauville NTV650 On va essayer d tre honn te Je dois comparer deux honda la tr s particuli re Pacific Coast d couverte et l ind modable Deauville NTV650 la mienne Ma description va porter essentiellement sur la PC800 et donc dans mon texte je parlerai