IEC 62891:2020 PDF

Name: IEC 62891:2020 — Maximum power point tracking efficiency of grid connected photovoltaic inverters
SKU: IEC 62891:2020
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Maximum power point tracking efficiency of grid connected photovoltaic inverters

Название (английский):

IEC 62891:2020

Maximum power point tracking efficiency of grid connected photovoltaic inverters

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 34
Дата публикации:: 15 июля 2020 г.
Издание:: IEC IS 62891 edition 1 version 1
ICS:: 27.160

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Описание (английский):

IEC 62891:2020 provides a procedure for the measurement of the efficiency of the maximum power point tracking (MPPT) of inverters used in grid-connected photovoltaic (PV) systems. Both the static and dynamic MPPT efficiency are considered. Based on the static MPPT efficiency calculated in this document and steady state conversion efficiency determined in IEC 61683 the overall efficiency can be calculated. The dynamic MPPT efficiency is indicated separately.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты IEC

Overview

IEC 62891:2020 specifies a standardized procedure for measuring the maximum power point tracking (MPPT) efficiency of inverters used in grid‑connected photovoltaic (PV) systems. The standard covers both static MPPT efficiency (steady-state ability to find the MPP) and dynamic MPPT efficiency (response to irradiance fluctuations). Based on the static MPPT efficiency calculated per IEC 62891 and the steady‑state conversion efficiency measured according to IEC 61683, an overall inverter efficiency can be derived. Dynamic MPPT performance is reported separately.

Keywords: IEC 62891, MPPT efficiency, grid‑connected photovoltaic inverters, static MPPT efficiency, dynamic MPPT efficiency, PV inverter testing.

Key topics and technical requirements

Scope and applicability

Procedure applies to grid‑connected PV inverters and may also be used for devices with MPPT (e.g., charge controllers, optimizers).

Measurement methodology

Defines test set‑up, measured and calculated quantities, and clear procedures for static and dynamic MPPT tests.
Static MPPT tests assess accuracy across representative operating points; dynamic tests use defined irradiance/voltage/time profiles to evaluate tracking under transient conditions.

Test apparatus requirements (Annex A)

Requirements for PV generator simulators, AC supplies, transient stability, dynamic characteristics and calibration/uncertainty are specified.

Dynamic test profiles (Annex B)

Standardized test sequences and ramp profiles for realistic irradiance fluctuations and start/stop behavior.

PV generator models (Annex C)

Reference current–voltage (I/V) and power characteristics for different PV technologies to ensure repeatable tests.

Efficiency weighting and normalization (Annexes D & E)

Weighting factors for regional efficiency metrics (e.g., European, CEC) and procedures to express efficiencies normalized to rated AC power.

Reporting

Static MPPT efficiency is combined with IEC 61683 conversion efficiency for an overall figure; dynamic MPPT efficiency is reported separately.

Practical applications and users

Manufacturers - optimize MPPT algorithms, validate product performance and support datasheet claims.

Test laboratories & certification bodies - perform repeatable MPPT efficiency measurements for conformity, performance labeling and certification.

System designers & integrators - estimate real energy yield, inform inverter selection for sites with variable irradiance.

Researchers & consultants - compare MPPT strategies and quantify transient tracking losses for modelling and optimisation.

Regulators & procurement - set test-based performance requirements for incentive programs or procurement specifications.

Practical benefits include consistent, repeatable measurements for product comparison, improved accuracy in energy-yield estimation, and better understanding of transient losses due to MPPT behavior.

Related standards

IEC 61683 - Procedure for measuring steady‑state conversion efficiency of power conditioners (used together to compute overall efficiency).

IEC TS 61836 - PV terms and definitions.

EN 50160 - Voltage characteristics of electricity supplied by public distribution networks.

Keywords (SEO): PV inverter testing, MPPT performance testing, photovoltaic standards, IEC 62891:2020, inverter efficiency measurement.

IEC 62891:2020 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

BS IEC 62891:2020

Maximum power point tracking efficiency of grid connected photovoltaic inverters

IEC 61683:1999

Photovoltaic systems - Power conditioners - Procedure for measuring efficiency

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