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BSI PD IEC TS 63106-2:2022

BSI PD IEC TS 63106-2:2022

$198.66

Simulators used for testing of photovoltaic power conversion equipment. Recommendations – DC power simulators

Published By Publication Date Number of Pages
BSI 2022 58
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PDF Catalog

PDF Pages PDF Title
2 undefined
4 CONTENTS
7 FOREWORD
9 INTRODUCTION
10 1 Scope
2 Normative references
11 3 Terms and definitions
Figures
Figure 1 – Examples of ports
12 4 PCE types with respect to DC voltage levels
4.1 General
13 4.2 Module level PCE
4.3 String level PCE
4.4 Central PCE
5 Test setup for utility interactive inverters
5.1 General
5.2 Test setup examples
14 5.3 System configuration options
5.3.1 General
5.3.2 PV array
Figure 2 – Examples of fundamental setup of EUT test system
15 5.3.3 PV array simulator
5.3.4 DC power supply
6 General recommendations for DC power simulator
6.1 General
16 6.2 DC output voltage accuracy and ripple
6.3 I-V curve stability for EUT testing
6.3.1 General
17 6.3.2 DC irradiance change rate
18 6.4 DC power simulator performance and characteristics for utility interaction tests
19 Tables
Table 1 – Grid qualification/Requalification – In-range AC voltage before connection/reconnection
20 Table 2 – Grid qualification/Requalification – In-range AC frequency before connection/reconnection
21 Table 3 – Power capability: Nameplate P, Q, S under normal and near-normal grid conditions
22 Table 4 – Power capability: Limitation of P/Q/S/PF by setpoint
23 Table 5 – Power capability: Ramp rate or soft start time-developing magnitude by set rate
24 Table 6 – Grid protection tests – AC over-voltage (OV) and under-voltage (UV) trip tests
Table 7 – Grid protection tests: OF/UF trips
25 Table 8 – Grid protection tests: Anti-islanding
26 Table 9 – Grid protection tests: Rate of Change of Frequency (ROCOF) trips
Table 10 – Grid protection tests: Open phase
27 Table 11 – Power quality tests: Current harmonics, inter-harmonics, THDi
28 Table 12 – Power quality tests: Flicker (continuous)
29 Table 13 – Power quality tests: Current inrush (at connection switch close)
Table 14 – Power quality tests: AC output current imbalance
30 Table 15 – Power quality tests: Transient over-voltage (TrOV) on load dump
31 Table 16 – Grid support tests: UV/OV ride-through with/without Iq injection
32 Table 17 – Grid support tests: UF/OF ride-through
Table 18 – Grid support tests: ROCOF ride-through
33 Table 19 – Grid support tests: Phase-jump ride-through
34 Table 20 – Grid support tests: P (f), PF (P, V), Q (V), P (V)
35 Table 21 – External command response tests: Magnitude accuracy for P/Q/S/PF by setpoint
36 6.5 Additional tests conducted with DC power simulators
6.5.1 General
Table 22 – External command response tests: Response to external setpoint changes (response time, settling time test)
37 6.5.2 PCE operational stability with sudden irradiance changes (due to movement of sun between clouds)
Table 23 – Test items and DC power simulators application for PCE
38 6.5.3 Automatic start and stop operation with gradual irradiance changes (representing morning and evening conditions)
6.5.4 PCE DC to AC power conversion efficiency measurement
6.5.5 PCE maximum power point tracking efficiency measurement
39 6.5.6 PCE total power conversion efficiency measurement
6.6 Avoidance measures of transient impact to EUTs
40 Annex A (informative)DC I-V curve dynamic accuracy against MPPT control
A.1 General
A.2 Example of DC I-V curve stability for MPPT properties
A.2.1 MPPT control
Figure A.1 – Voltage and current swing by MPPT control on I-V curve around MPP
41 A.2.2 Recommended stability of operation on the I-V curve
A.2.3 Recommended I-V curve resolution
A.2.4 Use of DC power supply as an input of EUT
Figure A.2 – Current and voltage swing by MPPT control on I-V curve below MPP
42 Figure A.3 – Current and voltage swing by MPPT control on I-V characteristic curve of DC power supply
43 Annex B (informative)DC power simulator stability against utility-frequency ripple voltage/current
B.1 General
B.2 Example of twice the utility-frequency ripple voltage/current
B.2.1 Twice the utility-frequency ripple voltage/current
Figure B.1 – DC current and voltage ripple on single-phase GCPC
44 B.2.2 Stability of I-V curve for the DC ripple
Figure B.2 – DC current and voltage ripple on three-phase GCPC with UVRT test
45 Figure B.3 – DC ripple I-V swing on I-V curve of PV array
46 Annex C (informative)PV array simulator I-V curve stability against quick power change in UVRT test
C.1 General
C.2 DC voltage/current shift by withdrawing power change in UVRT test
47 Figure C.1 – DC input voltage/current transition on zero-voltage ride through test – AC voltage sudden reduction
48 Figure C.2 – DC input voltage/current transition on zero-voltage ride through test – AC voltage sudden recovery
Figure C.3 – DC input voltage/current transition on UVRT test – AC voltage sudden decrease
49 Annex D (informative)DC I-V curve stability against low irradiance at sunrise and sunset
D.1 General
D.2 Example of a DC I-V curve stability against slow irradiance change rate in the morning and evening – I-V curve with low irradiance periods and EUT input voltage/current transition
Figure D.1 – DC input voltage/current transition area in the morning and evening
50 Figure D.2 – DC input voltage transition pattern example in the morning
51 Annex E (informative)DC I-V curve behaviour in rapidly varying irradiance conditions
E.1 General
E.2 I-V curve response to varying irradiance
E.2.1 Irradiance sudden change on I-V characteristics of the PV array (an example)
E.2.2 Recommendation of irradiance quick change rate for test of the EUT by PV array simulator
52 Figure E.1 – DC input voltage/current quick transition and MPPT
Figure E.2 – Irradiance quick change example
53 Figure E.3 – Irradiation change rate for PV array and wind orientation
54 Bibliography

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