🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
BS EN 61724-1:2017:2018 Edition

BS EN 61724-1:2017:2018 Edition

$198.66

Photovoltaic system performance – Monitoring

Published By Publication Date Number of Pages
BSI 2018 64
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Category:

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

This part of IEC 61724 outlines equipment, methods, and terminology for performance monitoring and analysis of photovoltaic (PV) systems. It addresses sensors, installation, and accuracy for monitoring equipment in addition to measured parameter data acquisition and quality checks, calculated parameters, and performance metrics. In addition, it serves as a basis for other standards which rely upon the data collected.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 CONTENTS
10 FOREWORD
12 INTRODUCTION
Figures
Figure 1 – Possible elements of PV systems
14 1 Scope
2 Normative references
15 3 Terms and definitions
18 4 Monitoring system classification
5 General
5.1 Measurement uncertainty
Tables
Table 1 – Monitoring system classifications and suggested applications
19 5.2 Calibration
5.3 Repeated elements
5.4 Power consumption
5.5 Documentation
5.6 Inspection
20 6 Data acquisition timing and reporting
6.1 Sampling, recording, and reporting
Figure 2 – Sampling, recording, and reporting
21 6.2 Timestamps
7 Measured parameters
7.1 General requirements
Table 2 – Sampling and recording interval requirements
23 Table 3 – Measured parameters and requirements for each monitoring system class
25 7.2 Irradiance
7.2.1 On-site irradiance measurement
Table 4 – Relation between system size (AC) and number of sensors for specific sensors referenced in Table 3
26 Table 5 – Sensor choices and requirements for in-plane and global irradiance
27 Table 6 – Irradiance sensor alignment accuracy
28 Table 7 – Irradiance sensor maintenance requirements
30 7.2.2 Satellite remote sensing of irradiance
31 7.3 Environmental factors
7.3.1 PV module temperature
Table 8 – PV module temperature sensor maintenance requirements
32 7.3.2 Ambient air temperature
7.3.3 Wind speed and direction
Table 9 – Ambient air temperature sensor maintenance requirements
33 7.3.4 Soiling ratio
Table 10 – Wind sensor maintenance requirements
35 7.3.5 Rainfall
7.3.6 Snow
7.3.7 Humidity
36 7.4 Tracker system
7.4.1 Single-axis trackers
7.4.2 Dual-axis trackers for >20x systems
7.5 Electrical measurements
37 7.6 External system requirements
8 Data processing and quality check
8.1 Daylight hours
Table 11 – Inverter-level electrical measurement requirements
Table 12 – Plant-level AC electrical output measurement requirements
38 8.2 Quality check
8.2.1 Removing invalid readings
8.2.2 Treatment of missing data
9 Calculated parameters
9.1 Overview
39 9.2 Summations
9.3 Irradiation
Table 13 – Calculated parameters
40 9.4 Electrical energy
9.4.1 General
9.4.2 DC output energy
9.4.3 AC output energy
9.5 Array power rating
9.5.1 DC power rating
9.5.2 AC power rating
9.6 Yields
9.6.1 General
41 9.6.2 PV array energy yield
9.6.3 Final system yield
9.6.4 Reference yield
9.7 Yield losses
9.7.1 General
9.7.2 Array capture loss
9.7.3 Balance of systems (BOS) loss
42 9.8 Efficiencies
9.8.1 Array (DC) efficiency
9.8.2 System (AC) efficiency
9.8.3 BOS efficiency
10 Performance metrics
10.1 Overview
43 10.2 Summations
10.3 Performance ratios
10.3.1 Performance ratio
Table 14 – Performance metrics
44 10.3.2 Temperature-corrected performance ratios
45 10.4 Performance indices
46 11 Data filtering
11.1 Use of available data
11.2 Filtering data to specific conditions
11.3 Reduced inverter, grid, or load availability
47 Annex A (informative)Sampling interval
A.1 General considerations
A.2 Time constants
A.3 Aliasing error
48 A.4 Example
49 Annex B (informative)Module backsheet temperature sensor selection and attachment
B.1 Objective
B.2 Sensor and material selection
B.2.1 Optimal sensor types
B.2.2 Optimal tapes
B.2.3 Cyanoacrylate adhesives and backsheet integrity
50 B.3 Sensor attachment method
B.3.1 Permanent versus temporary
B.3.2 Attachment location
B.3.3 Sensor attachment
51 Figure B.1 – Sensor attachment, permanent
Figure B.2 – Sensor attachment, temporary
Figure B.3 – Sensor element wire strain relief
53 Annex C (informative)Derate factors
54 Annex D (normative)Systems with local loads, storage, or auxiliary sources
D.1 System types
Figure D.1 – Energy flow between possible elements of different PV system types
55 Table D.1 – Elements of different PV system types
56 D.2 Parameters and formulas
Table D.2 – Parameters and equations for different system types
62 Bibliography

Related products

BS EN 61724-1:2017
$198.66