61850-5©1EC:2001 21 57/526/CDV 6.6 Conformance test requirements Interoperability depends both on the device properties and the system design and engineering.Conformance tests shall be performed to verify that the communication behavior of a device as system component is compliant with the interoperability specification of IEC 61850.These tests specify what shall be applied on a device to check that the communication function is correctly performed with a complementary device.Also the pass criteria have to be well defined. Conformance tests may involve the use of various simulators to represent the context of the substation and of the communication network. Definitions of the conformance tests will be given in part 10 of the standard(IEC 61850-10). not for reprodu
61850-5 IEC:2001 57/526/CDV 21 6.6 Conformance test requirements Interoperability depends both on the device properties and the system design and engineering. Conformance tests shall be performed to verify that the communication behavior of a device as system component is compliant with the interoperability specification of IEC 61850. These tests specify what shall be applied on a device to check that the communication function is correctly performed with a complementary device. Also the pass criteria have to be well defined. Conformance tests may involve the use of various simulators to represent the context of the substation and of the communication network. Definitions of the conformance tests will be given in part 10 of the standard (IEC 61850-10).
61850-5©1EC:2001 22 57/526/CDV 7 RULES FOR FUNCTION DEFINITION To get the communication requirements in a substation,an identification of all functions is necessary.The function description considers the LN and PICOM approach and consists of three steps Function description including the decomposition into LNs Logical node description including the exchanged PICOMs PICOM description including the attributes Any identification of functions in substations will be incomplete,but the assumption is made that the identified functions cover in a very representative way all communication requirements in substations. 7.1 Function description The function description-given in the Annex-provides the following information ·Task of the function Starting criteria for the function Result or impact of the function Performance of the function Function decomposition This clause describes how functions are decomposed using LNs and how many decomposition sets exist typically.This information is very important since the communication is based on interacting LNs. Interaction with other functions 7.2 Logical Node description The Logical node description-given later in the body of this part-provides the following information Grouping according to their most common application area Short textual description of the functionality IEEE device function number if applicable (for protection and some protection related logical nodes only) Abbreviation/acronym used within the documents of IEC 61850 Relation between functions and logical nodes in tables and in the function description(see Annex) Exchanged PICOMs described in tables 7.3 PICOM description The PICOM description -given later in the body of this part -provides the following information: Semantics Logical point-to-point connection Performance requirements Type of data
61850-5 IEC:2001 57/526/CDV 22 7 RULES FOR FUNCTION DEFINITION To get the communication requirements in a substation, an identification of all functions is necessary. The function description considers the LN and PICOM approach and consists of three steps • Function description including the decomposition into LNs • Logical node description including the exchanged PICOMs • PICOM description including the attributes Any identification of functions in substations will be incomplete, but the assumption is made that the identified functions cover in a very representative way all communication requirements in substations. 7.1 Function description The function description – given in the Annex – provides the following information • Task of the function • Starting criteria for the function • Result or impact of the function • Performance of the function • Function decomposition This clause describes how functions are decomposed using LNs and how many decomposition sets exist typically. This information is very important since the communication is based on interacting LNs. • Interaction with other functions 7.2 Logical Node description The Logical node description – given later in the body of this part – provides the following information • Grouping according to their most common application area • Short textual description of the functionality • IEEE device function number if applicable (for protection and some protection related logical nodes only) • Abbreviation/acronym used within the documents of IEC 61850 • Relation between functions and logical nodes in tables and in the function description (see Annex) • Exchanged PICOMs described in tables 7.3 PICOM description • The PICOM description – given later in the body of this part – provides the following information: • Semantics • Logical point-to-point connection • Performance requirements • Type of data
61850-5©1EC:2001 23 57/526/CDV 8 CATEGORIES OF FUNCTIONS Different categories of functions are identified.Some functions may belong not uniquely to the given category and its category allocation is a convention only.The functions are listed in the following only;the function description is given in the Annex. 8.1 System support functions ·Network management Time synchronization Physical device self-checking 8.2 System configuration or maintenance functions ·Node identification ·Software management Configuration management Operative mode control of Logical Nodes Setting Test mode producti System security management 8.3 Operational or control functions Access security management ·Control Operational use of spontaneous change of indications Synchronous switching (point-on-wave switching) Parameter set switching ·Alarm management Event(management and)recording ·Data retrieval Disturbance/fault record retrieval 8.4 Local process automation functions Protection function(Generic) Distance protection(example of protection function) Bay interlocking 8.5 Distributed automatic support functions Station-wide interlocking Distributed synchrocheck 8.6 Distributed process automation functions 。Breaker failure Automatic protection adaptation (Generic)
61850-5 IEC:2001 57/526/CDV 23 8 CATEGORIES OF FUNCTIONS Different categories of functions are identified. Some functions may belong not uniquely to the given category and its category allocation is a convention only. The functions are listed in the following only; the function description is given in the Annex. 8.1 System support functions • Network management • Time synchronization • Physical device self-checking 8.2 System configuration or maintenance functions • Node identification • Software management • Configuration management • Operative mode control of Logical Nodes • Setting • Test mode • System security management 8.3 Operational or control functions • Access security management • Control • Operational use of spontaneous change of indications • Synchronous switching (point-on-wave switching) • Parameter set switching • Alarm management • Event (management and) recording • Data retrieval • Disturbance/fault record retrieval 8.4 Local process automation functions • Protection function (Generic) • Distance protection (example of protection function) • Bay interlocking 8.5 Distributed automatic support functions • Station-wide interlocking • Distributed synchrocheck 8.6 Distributed process automation functions • Breaker failure • Automatic protection adaptation (Generic)
61850-5©1EC:2001 24 57/526/CDV not for reproduction Reverse blocking(Example for automatic protection adaptation) ·Load shedding ·Load restoration Voltage and reactive power control Infeed switchover and transformer change Automatic switching sequences
61850-5 IEC:2001 57/526/CDV 24 • Reverse blocking (Example for automatic protection adaptation) • Load shedding • Load restoration • Voltage and reactive power control • Infeed switchover and transformer change • Automatic switching sequences
61850-5©1EC:2001 25 57/526/CDV 9 THE LOGICAL NODE CONCEPT 9.1 Logical nodes and logical connections To fulfill all the requirements stated above,especially the free distribution and allocation of functions,all functions are decomposed into logical nodes (LN)that may reside in one or more physical devices.There are some data to be communicated which refer not to any function but to the physical device itself like nameplate information or the result of device self- supervision.Therefore,a logical node "device"is needed and will be introduced as LLN0.The LNs are linked by logical connections (LC)for a dedicated exchange of data in between. Therefore,the standard shall define the communication between these LNs. This approach is shown in Fig.3.The logical nodes (LN)are both allocated to functions (F) and physical devices (PD).The logical nodes are linked by logical connections (LC),the devices by physical connections (PC).Any logical node is part of a physical device;any logical connection is part of a physical connection.The logical node "device"dedicated for any physical device is displayed as LNO(in the four letter code introduced below for all logical nodes LLNO). Since it is impossible to define all functions for today and tomorrow and any kind of distribution and interaction,it is very important to specify and standardize the interaction between the logical nodes in a generic way. F1 LC12 LN1 LN2 F2 PC13 PD1 LNO LN3 LC36 LN6 PC12 LC35 LNO LC14 LC56 PD2 LN5 PD3 PC23 LN4 LNO Fig.3-The logical node and link concept(explanation see text)
61850-5 IEC:2001 57/526/CDV 25 9 THE LOGICAL NODE CONCEPT 9.1 Logical nodes and logical connections To fulfill all the requirements stated above, especially the free distribution and allocation of functions, all functions are decomposed into logical nodes (LN) that may reside in one or more physical devices. There are some data to be communicated which refer not to any function but to the physical device itself like nameplate information or the result of device selfsupervision. Therefore, a logical node “device” is needed and will be introduced as LLN0. The LNs are linked by logical connections (LC) for a dedicated exchange of data in between. Therefore, the standard shall define the communication between these LNs. This approach is shown in Fig. 3. The logical nodes (LN) are both allocated to functions (F) and physical devices (PD). The logical nodes are linked by logical connections (LC), the devices by physical connections (PC). Any logical node is part of a physical device; any logical connection is part of a physical connection. The logical node “device” dedicated for any physical device is displayed as LN0 (in the four letter code introduced below for all logical nodes LLN0). Since it is impossible to define all functions for today and tomorrow and any kind of distribution and interaction, it is very important to specify and standardize the interaction between the logical nodes in a generic way. Fig. 3 – The logical node and link concept (explanation see text) LN2 LN3 LN1 LN6 LN4 LN5 PD1 PD3 PD2 F1 F2 PC13 PC23 PC12 LC36 LC56 LC14 LC35 LC12 LN0 LN0 LN0