IEEE 1277-2020 pdf free.IEEE Standard General Requirements and 1 Test Code for Dry-Type and Oil-Immersed Smoothing Reactors and for Dry-Type Converter Reactors for DC Power Transmission.
IEEE 1277 is the definition and specification of the functional requirements and test code for dry-type and oil-immersed smoothing reactors and dry-type converter reactors for high-voltage direct current (HVDC) power transmission. This standard only applies to smoothing reactors for dc transmission and converter reactors for dc transmission located at the converter arms.
1.2 Purpose
The purpose of this standard is to provide those in the HVDC industry, manufacturers, and “end users” a document that defines and specifies the electrical, mechanical, and physical requirements of dry-type and oil-immersed smoothing reactors for HVDC applications. Furthermore, the document defines and specifies electrical, mechanical, and physical requirements of dry-type converter reactors used for voltage-sourced FIVDC converters (VSC HVDC) that are located at the converter arms and loaded with dc and ac current. Test code is also defined and specified. Converter reactors are usually built in dry-type air-core and air-cooled design. Thus, only this type of converter reactor design is considered in this standard.
In addition, appropriate technical background information, that will facilitate the use of this standard, is presented or identified.
1.3 Word usage
The word shall indicates mandatory requirements strictly to be followed in order to conform to the standard and from which no deviation is permitted (shall equals is required to)
The word should indicates that among several possibilities one is recommended as particularly suitable, without mentioning or excluding others: or that a certain course of action is preferred but not necessarily required (should equals is recommended that).
The word rnai is used to indicate a course of action permissible within the limits of the standard (may equals is permitted to).
The word can is used for statements of possibility and capability, whether material, physical, or causal (can equals is able to).
2. Normative references
The following referenced documents are indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
3. Definitions For the purposes of this document, the following tcnns and definitions apply. Standard transformer terminology available in IEEE Std C57.l2.80 shall apply. The IEEE Standards Dictionary Online should be consulted for terms not defined in this clause.
ambient temperature: The ambient temperature is the temperature of the cooling air surrounding a smoothing reactor or converter reactor.
harmonic current.
Smoothing reactor: The total harmonic current content superimposed on the dc current. For specific engineering purposes, it is essential to define the harmonic spectrum in terms of rms amplitude and frequency.
Converter reactor: The total harmonic current content superimposed on the dc current and system frequency ac current. For specific engineering purposes. it is essential to define the harmonic spectrum in terms of rrns amplitude and frequency.
incremental inductance: The incremental inductance of a smoothing reactor is the inductance of the smoothing reactor, in henries, determined on the basis of a small current increase (or decrease) at a pre-defined dc current. The incremental inductance is, therefore, defined as a function of dc current from the minimum current up to the maximum peak short-circuit current.
nominal inductance of a converter reactor: The nominal inductance of a converter reactor is the self- inductance at nominal system frequency.nomiiial in(luctance of a smoothing reactor: The nominal inductance of a smoothing reactor is the incremental inductance seen by the ac current of a particular value and frequency superimposed on the direct current through the reactor. For a 1 2-pulse scheme, this frequency is 12 times the system frequency (e.g, 720 Hz for 60 Hz systems).IEEE 1277 pdf download.