1. A modeling method for an intelligent terminal device in a low-voltage transformer area is characterized by comprising the following steps:

s1, classifying the pre-collected parameters of the intelligent terminal device in the low-voltage transformer area into an enabling class data set and a numerical value class data set according to the data types defined by the IEC61850 protocol;

s2, forming corresponding logic nodes by the enabling class data sets and the numerical value class data sets according to an IEC61850 protocol, wherein different logic nodes have different function modules so as to execute corresponding functions;

s3, traversing all logic nodes and forming a logic device by the logic nodes with common characteristics or common characteristics, thereby establishing a logic device model of the intelligent terminal device in the low-voltage distribution area;

and S4, performing data interaction between the logic equipment model of the low-voltage transformer area intelligent terminal device and the intelligent electronic equipment based on the data transmission instruction in the MMS communication protocol.

2. The modeling method for the low-voltage transformer area intelligent terminal device according to claim 1, wherein the pre-collected parameters of the low-voltage transformer area intelligent terminal device in step S1 include remote control result signal data, fault signal data, fixed value area number data, remote signaling data, remote measurement curve data, protection remote signaling data, fault trip data, fault location data, protection analog quantity, protection fixed value data, equipment parameter data, protection fault recording and parameter data, and soft pressing plate parameter data;

wherein the enabling type data set comprises the remote control result signal data, the remote signaling data, the protection remote signaling data, the fault tripping data, the protection analog quantity, the protection fixed value data and the soft pressing plate parameter data;

the numerical data set includes the fault signal data, the fixed-value area code data, the telemetry curve data, the fault location data, the equipment parameter data, and protection fault recording and parameter data.

3. The modeling method of the low-voltage transformer area intelligent terminal device according to claim 1, wherein the logic nodes in step S2 are classified into common information type logic nodes, switch type logic nodes, terminal information type logic nodes, status indication type logic nodes and transformer area measurement type logic nodes according to measurement object attributes reflected by data;

the public information logic node comprises physical information of the intelligent terminal device, wherein the physical information comprises a current value, a voltage value and harmonic content;

the switch-class logic node comprises switch position data which is contained in the intelligent terminal device and participates in control;

the terminal information logic node comprises attribute information of a terminal connected with subordinate equipment determined by the intelligent terminal device according to the topological connection relation;

the state indication type logic node comprises states and state alarm data of each area of the low-voltage transformer area and each intelligent terminal device;

the station measurement-like logical node comprises electrical property values of a low-voltage station, wherein the electrical property values comprise voltage, current and power factor.

4. The modeling method of the low-voltage transformer area intelligent terminal device according to claim 1, wherein the logic devices in step S3 are classified into common logic devices, measurement logic devices, protection logic devices, control logic devices, recording logic devices, and metering logic devices according to functions.

5. The utility model provides a low pressure platform district intelligent terminal device modeling system which characterized in that includes:

the data set module is used for classifying the pre-collected parameters of the intelligent terminal device in the low-voltage transformer area into an enabling class data set and a numerical value class data set according to the data types defined by the IEC61850 protocol;

the logic node module is used for forming corresponding logic nodes by the enabling class data sets and the numerical value class data sets according to an IEC61850 protocol, and different logic nodes are correspondingly provided with different function modules so as to execute corresponding functions;

the logic equipment model module is used for traversing all logic nodes and forming the logic nodes with common characteristics or common characteristics into a logic equipment so as to establish a logic equipment model of the intelligent terminal device in the low-voltage distribution area;

and the data interaction module is used for performing data interaction on the logic equipment model of the low-voltage transformer area intelligent terminal device and the intelligent electronic equipment based on a data transmission instruction in an MMS communication protocol.

Background

With the wide access of new energy devices and the continuous improvement of the personalized service requirements of power users, the low-voltage transformer area is used as an important component of electric energy transmission and information interaction between users and a power grid, and the challenges of access of massive intelligent devices and personalized service of users need to be faced.

In order to effectively adapt to the development of a new situation in a low-voltage distribution area, the current main solution is to configure an intelligent terminal to realize the functions of data transmission, task request, control output, information conversion and the like of a cloud-edge cooperative power network. At present, intelligent terminal equipment in a low-voltage transformer area has various types and functions, and the interaction among the equipment is increasingly close, but when parameter setting and adaptability testing are carried out before the interoperation of the intelligent terminal equipment, modeling standards of various manufacturers and regions for the intelligent terminal equipment are different, and hidden dangers are buried for subsequent operation and maintenance management.

In order to better meet the requirement of 'plug and play' of a cloud-side computing system, a set of unified equipment communication standard in the industry is formulated, so that the interoperation and seamless integration between intelligent terminal equipment and other electric power and communication equipment can be realized, the service processing efficiency and the operation reliability of a power grid are improved, and the operation and maintenance management of the equipment is facilitated.

The IEC61850 protocol is called a substation Communication network and System in subsystems (Communication Networks and systems) and is the only international intelligent Communication System for Substations and smart grids. The method mainly aims to realize the interoperation among devices, namely, the distributed devices can realize plug-and-play and automatic interconnection, and two communication parties can understand information commands transmitted and received mutually and carry out corresponding trigger action and coordination work.

The IEC61850 protocol adopts the most main mode of object-oriented modeling and self-description, can realize the interoperation and information sharing among electronic devices (IEDs) of different countries and different manufacturers, and can be used as a communication specification and an object-oriented modeling method of an intelligent terminal device in a low-voltage transformer area.

The existing Intelligent terminal modeling scenes are all Intelligent substations, the common modeling idea is that Intelligent terminal equipment in one Intelligent substation is regarded as an Intelligent Electronic Device (IED), the whole modeling system is composed of IED objects, and the established hierarchical information model comprises 4 levels from top to bottom: servers, logical devices, logical nodes, and data objects. Meanwhile, each IED object contains one or more servers, each server itself comprising one or more logical devices; the logical device is composed of logical nodes, the logical nodes include data objects, and the data objects are composed of data attributes. Any one client may communicate with the server to access data through the abstract communication service interface. And the object names are unique in a specific scope, and the object reference is the whole path name formed by connecting the object names in the hierarchical information model in series. However, a unified modeling standard is lacked, and each manufacturer and each transformer substation adopt respective modeling methods, so that the requirement of interoperation of multiple devices in a low-voltage transformer area across areas is difficult to meet, and the efficiency of information interaction and operation and maintenance of the devices is low.

Disclosure of Invention

The application provides a modeling method and a modeling system for an intelligent terminal device in a low-voltage transformer area, which are used for solving the technical problem that the efficiency of equipment information interaction and operation and maintenance is low due to the fact that the requirement of cross-area interoperation of multiple pieces of equipment in the low-voltage transformer area is difficult to meet.

In view of this, the first aspect of the present application provides a modeling method for a low-voltage transformer area intelligent terminal device, including the following steps:

s1, classifying the pre-collected parameters of the intelligent terminal device in the low-voltage transformer area into an enabling class data set and a numerical value class data set according to the data types defined by the IEC61850 protocol;

s2, forming corresponding logic nodes by the enabling class data sets and the numerical value class data sets according to an IEC61850 protocol, wherein different logic nodes have different function modules so as to execute corresponding functions;

s3, traversing all logic nodes and forming a logic device by the logic nodes with common characteristics or common characteristics, thereby establishing a logic device model of the intelligent terminal device in the low-voltage distribution area;

and S4, performing data interaction between the logic equipment model of the low-voltage transformer area intelligent terminal device and the intelligent electronic equipment based on the data transmission instruction in the MMS communication protocol.

Preferably, the pre-collected parameters of the intelligent terminal device in the low-voltage transformer area in step S1 include remote control result signal data, fault signal data, fixed value area number data, remote signaling data, remote measurement curve data, protection remote signaling data, fault trip data, fault location data, protection analog quantity, protection fixed value data, equipment parameter data, protection fault recording and parameter data, and soft pressing plate parameter data;

wherein the enabling type data set comprises the remote control result signal data, the remote signaling data, the protection remote signaling data, the fault tripping data, the protection analog quantity, the protection fixed value data and the soft pressing plate parameter data;

the numerical data set includes the fault signal data, the fixed-value area code data, the telemetry curve data, the fault location data, the equipment parameter data, and protection fault recording and parameter data.

Preferably, the logic nodes in step S2 are classified into common information type logic nodes, switch type logic nodes, terminal information type logic nodes, status indication type logic nodes and platform area measurement type logic nodes according to the measurement object attributes reflected by the data;

the public information logic node comprises physical information of the intelligent terminal device, wherein the physical information comprises a current value, a voltage value and harmonic content;

the switch-class logic node comprises switch position data which is contained in the intelligent terminal device and participates in control;

the terminal information logic node comprises attribute information of a terminal connected with subordinate equipment determined by the intelligent terminal device according to the topological connection relation;

the state indication type logic node comprises states and state alarm data of each area of the low-voltage transformer area and each intelligent terminal device;

the station measurement-like logical node comprises electrical property values of a low-voltage station, wherein the electrical property values comprise voltage, current and power factor.

Preferably, the logic devices in step S3 are classified by function into a common logic device, a measurement logic device, a protection logic device, a control logic device, a recording logic device, and a metering logic device.

In a second aspect, the present invention further provides a modeling system for a low-voltage transformer area intelligent terminal device, including:

the data set module is used for classifying the pre-collected parameters of the intelligent terminal device in the low-voltage transformer area into an enabling class data set and a numerical value class data set according to the data types defined by the IEC61850 protocol;

the logic node module is used for forming corresponding logic nodes by the enabling class data sets and the numerical value class data sets according to an IEC61850 protocol, and different logic nodes are correspondingly provided with different function modules so as to execute corresponding functions;

the logic equipment model module is used for traversing all logic nodes and forming the logic nodes with common characteristics or common characteristics into a logic equipment so as to establish a logic equipment model of the intelligent terminal device in the low-voltage distribution area;

and the data interaction module is used for performing data interaction on the logic equipment model of the low-voltage transformer area intelligent terminal device and the intelligent electronic equipment based on a data transmission instruction in an MMS communication protocol.

According to the technical scheme, the embodiment of the application has the following advantages:

the method and the system build a three-layer model structure of the data set, the logic nodes and the logic equipment on the basis of layering, cover the whole function logic, further build a logic equipment model of the intelligent terminal device in the low-voltage transformer area, reduce the interoperation and operation and maintenance difficulty among the devices, improve the comprehensive control efficiency of the low-voltage transformer area, and simultaneously, build a model by means of an IEC61850 protocol, so that a unified modeling standard of the intelligent terminal device in the low-voltage transformer area can be formed, the requirement of interoperation among multiple devices in the low-voltage transformer area across areas can be met conveniently, and the efficiency of equipment information interaction and operation and maintenance can be improved.

Drawings

Fig. 1 is a flowchart of a modeling method for an intelligent terminal device in a low-voltage transformer area according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a modeling system of a low-voltage transformer area intelligent terminal device according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Because the existing Intelligent terminal modeling scenes are all Intelligent substations, the common modeling idea is to regard Intelligent terminal equipment in one Intelligent substation as an IED (Intelligent Electronic Device), the whole modeling system is composed of IED objects, and the established hierarchical information model comprises 4 levels from top to bottom: servers, logical devices, logical nodes, and data objects. Meanwhile, each IED object contains one or more servers, each server itself comprising one or more logical devices; the logical device is composed of logical nodes, the logical nodes include data objects, and the data objects are composed of data attributes. Any one client may communicate with the server to access data through the abstract communication service interface. And the object names are unique in a specific scope, and the object reference is the whole path name formed by connecting the object names in the hierarchical information model in series. However, a unified modeling standard is lacked, and each manufacturer and each transformer substation adopt respective modeling methods, so that the requirement of interoperation of multiple devices in a low-voltage transformer area across areas is difficult to meet, and the efficiency of information interaction and operation and maintenance of the devices is low.

Therefore, the invention provides a modeling method for an intelligent terminal device in a low-voltage transformer area, and please refer to fig. 1, which comprises the following steps:

s1, classifying the pre-collected parameters of the intelligent terminal device in the low-voltage transformer area into an enabling class data set and a numerical value class data set according to the data types defined by the IEC61850 protocol;

s2, forming corresponding logic nodes by the enabling class data sets and the numerical value class data sets according to an IEC61850 protocol, wherein different logic nodes have different function modules so as to execute corresponding functions;

s3, traversing all logic nodes and forming a logic device by the logic nodes with common characteristics or common characteristics, thereby establishing a logic device model of the intelligent terminal device in the low-voltage distribution area;

and S4, performing data interaction between the logic equipment model of the low-voltage station area intelligent terminal device and the intelligent electronic equipment based on the data transmission instruction in the MMS communication protocol.

This embodiment constructs the data set based on the layering, logic node, logic equipment three-layer model structure, whole function logic has been covered, and then establish low-voltage transformer district intelligent terminal device's logic equipment model, interoperation and operation and maintenance degree of difficulty have been reduced between the device, promote the comprehensive management and control efficiency in low-voltage transformer district, and simultaneously, model with the help of IEC61850 stipulation, can form low-voltage transformer district intelligent terminal device's unified modeling standard, be convenient for satisfy the requirement that low-voltage transformer district multi-device cross-regional carries out the interoperation, the efficiency of equipment information interaction and operation and maintenance has been improved.

The following is a detailed description of an embodiment of a modeling method for a low-voltage transformer area intelligent terminal device provided by the invention.

S101, collecting operation parameters and data required by operation of the intelligent terminal device in the low-voltage transformer area in the operation process, wherein the data comprises remote control result signal data, fault signal data, fixed value area code data, remote signaling data, remote sensing curve data, protection remote signaling data, fault tripping data, fault positioning data, protection analog quantity, protection fixed value data, equipment parameter data, protection fault recording and parameter data and soft pressing plate parameter data.

And classifying the data of the intelligent terminal device in the low-voltage transformer area into an enabling class data set and a numerical value class data set according to the data types defined by the IEC61850 protocol. The enabling data set comprises remote control result signal data, remote signaling data, protection remote signaling data, fault trip data, protection analog quantity, protection fixed value data and soft pressing plate parameter data; the numerical data set comprises fault signal data, fixed value area code data, telemetering curve data, fault positioning data, equipment parameter data and protection fault recording and parameter data. See table 1 for details.

TABLE 1 data set classification table for intelligent terminal device in low-voltage distribution area

The data are grouped by the data set, the data (such as current values, voltage values, frequency values and the like) which need to be transmitted in real time and the data (such as power service information, power and the like) which do not have real-time requirements can be separately transmitted, and the data transmission and processing efficiency is improved.

S201, enabling class data sets and numerical value class data sets to form corresponding logic nodes according to an IEC61850 protocol, wherein different logic nodes have different function modules so as to execute corresponding functions;

it should be noted that a Logical Node (LN) is a modeling concept for modularly decomposing functions of the intelligent terminal device in the low-voltage distribution room.

Referring to an IEC61850 protocol, classifying the logic nodes into common information logic nodes, switch logic nodes, terminal information logic nodes, state indication logic nodes and distribution room measurement logic nodes according to the measurement object attributes reflected by the data; the public information logic node comprises physical information of the intelligent terminal device, and the physical information comprises a current value, a voltage value and harmonic content; the switch-class logic node comprises switch position data which is contained in the intelligent terminal device and participates in control; the terminal information type logical node comprises attribute information of a terminal connected with subordinate equipment determined by the intelligent terminal device according to the topological connection relation; the state indication type logic node comprises states and state alarm data of each area of the low-voltage transformer area and each intelligent terminal device; the station measurement class logical node comprises electrical attribute values of the low-voltage station, wherein the electrical attribute values comprise voltage, current and power factor.

The instantiation modeling principle of the logic node comprises the following steps:

A) logic nodes with function correlation exist outside the low-voltage transformer area and inside the low-voltage transformer area, and the logic nodes and the states of the logic nodes are related and consistent;

B) if the extension do of the file in one logic node needs to be repeatedly used, the extension do needs to be expanded in a mode of Arabic number postfix;

C) the soft pressure plate is uniformly added with an Ena suffix in the public information logic node for expansion;

D) the alarm defined by the standard uses signals in a model, and other unifications are expanded in the state indication type logic nodes; the alarm signal is sent up by the Alm of the state indication type logic node, and the common remote signaling signal is sent up by the Ind of the state indication type logic node;

E) different examples are respectively established for proportional brake differential protection and differential quick-break protection;

F) the non-electrical quantity signal should be modeled using a status indication class logical node.

S301, traversing all logic nodes and enabling the logic nodes with the common characteristics or the common characteristics to form a logic device, so that a logic device model of the intelligent terminal device in the low-voltage transformer area is established;

it should be noted that, a container in the intelligent terminal device is regarded as a Logical Device (LD), which is composed of a plurality of logical nodes and related communication services.

Generally, according to the IEC61850 specification, logical nodes with common characteristics or common features are divided into one logical device, and each logical device must include two logical nodes, namely a common information class logical node and a terminal information class logical node.

The logic devices are classified into a common logic device, a measurement logic device, a protection logic device, a control logic device, a recording logic device, and a metering logic device according to functions. Specifically, referring to table 2, table 2 shows a part of the logical device partitions and the logical nodes included in the same.

The inst name of the common logic device is LD0, the inst name of the measurement logic device is MEAS, the inst name of the protection logic device is PROT, the inst name of the control logic device is CTRL, the inst name of the wave recording logic device is RCD, and the inst name of the metering logic device is METR.

TABLE 2 logical device partitioning and logical nodes contained therein

In this embodiment, the established logic device model of the low-voltage transformer area intelligent terminal device includes a basic information type logic node, a state indication type logic node, a transformer area measurement type logic node, a harmonic measurement type logic node, and the like, where the common information type logic node includes a plurality of data sets including device physical information, such as APP data and parameter data, and functions to map data objects in the state indication type logic node and the switch type logic node.

S401, carrying out data interaction on the logic equipment model of the intelligent terminal device in the low-voltage transformer area and the intelligent electronic equipment based on a data transmission instruction in an MMS communication protocol.

In this embodiment, by defining the MMS communication protocol as an external communication protocol of a public information logic node, the intelligent electronic device reads and writes parameters in a logic device model of the low-voltage station area intelligent terminal device through a data transmission instruction in the MMS communication protocol.

The above is a detailed description of an embodiment of a modeling method for a low-voltage transformer area intelligent terminal device provided by the present invention, and the following is a detailed description of an embodiment of a modeling system for a low-voltage transformer area intelligent terminal device provided by the present invention.

For convenience of understanding, please refer to fig. 2, the modeling system of the low-voltage transformer area intelligent terminal device provided in this embodiment includes:

the data set module 100 is configured to classify pre-collected parameters of the intelligent terminal device in the low-voltage distribution area into an enabling class data set and a numerical value class data set according to a data type defined by an IEC61850 protocol;

the logic node module 200 is configured to configure the enabling class data set and the numerical value class data set into corresponding logic nodes according to an IEC61850 protocol, where different logic nodes have different function modules to execute corresponding functions;

a logic device model module 300, configured to traverse all logic nodes and form a logic device with a common characteristic or a common characteristic, so as to establish a logic device model of the low-voltage distribution area intelligent terminal device;

and the data interaction module 400 is configured to perform data interaction between the logic device model of the low-voltage station area intelligent terminal device and the intelligent electronic device based on a data transmission instruction in the MMS communication protocol.

This embodiment constructs the data set based on the layering, logic node, logic equipment three-layer model structure, whole function logic has been covered, and then establish low-voltage transformer district intelligent terminal device's logic equipment model, interoperation and operation and maintenance degree of difficulty have been reduced between the device, promote the comprehensive management and control efficiency in low-voltage transformer district, and simultaneously, model with the help of IEC61850 stipulation, can form low-voltage transformer district intelligent terminal device's unified modeling standard, be convenient for satisfy the requirement that low-voltage transformer district multi-device cross-regional carries out the interoperation, the efficiency of equipment information interaction and operation and maintenance has been improved.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.