CN101447698A - Centralized type wave recording system of digital transformer substation - Google Patents

Abstract

The present invention proposes a data-sharing digital substation centralized wave recording system based on IEC61850, which is oriented to digital substations, follows the IEC61850 standard, and records, analyzes and manages data in substations. The equipment supports XML, which enables the use of various means and tools It is possible to configure the equipment, which is more convenient for the exchange and sharing of information between different systems and different platforms; the standard substation configuration language SCL is used to configure the equipment related to communication, and any manufacturer's configuration tools that comply with IEC61850 can be identified. The centralized wave recording system of the digital substation has the advantages of digitization, openness, easy maintenance and convenient expansion. At the same time, the analysis and management software located at the station control layer can easily analyze and process the data and manage the wave recorder.

Description

A Centralized Wave Recording System for Digital Substation

technical field

The invention belongs to the field of electric power system automation, and in particular relates to a data sharing digital substation centralized wave recording system based on IEC61850.

Background technique

Digital substation and related technologies are hot issues in the field of power system automation in recent years. It is the result of the development of computer technology, network technology, and power system requirements. IEC61850 standard, multifunctional IED (Intelligent Electronic Device) and communication network are the key research contents.

The IEC 61850 standard (substation communication network and system standard) was formulated by the TC57 working group of the International Electrotechnical Commission on the basis of summarizing previous communication protocols to achieve seamless communication between devices from different manufacturers. Its core content includes function-based models and communication, and configuration management. Among them, the model is object-oriented; the communication is abstract and does not depend on specific networks and protocols; the configuration is managed by SCL (substation configuration language).

In the traditional substation fault recording system, the signal comes from the traditional voltage transformer, current transformer and switch semaphore. The function is realized by a microcomputer, which integrates fault dynamic recording, analysis and calculation, and result output. It can record the system current, voltage and its derivatives caused by large disturbances such as short-circuit faults, system oscillations, frequency collapses, and voltage collapses, such as active power, reactive power, non-periodic components, changes in system frequency, and fault distance, etc. Output analysis result. It is mainly used to detect the action behavior of relay protection and safety automatic devices, understand the change law of various electrical parameters in the system during the system transient process, and check the correctness of the power system calculation program and model parameters.

With the increasing promotion of digital transformers and fully digital substation integrated automation systems, the collectors and users of analog and digital signals are distributed in different devices, and the data can be shared through the network inside and outside the substation. The sharing of data requires that the data must be standardized, which makes the data recording and analysis device of the digital substation must also be developed from the traditional wave recording device to the digital centralized wave recording system oriented to the IEC61850 standard, recording the data transmitted in the form of communication messages in the substation , as an important basis for substation operation and maintenance.

Contents of the invention

According to the new digital substation centralized wave recording system of the present invention, it is divided into two parts: the wave recorder device, and the wave recording analysis management software located in the station control layer.

The wave recorder adopts a dual-machine and double-network redundant configuration, that is, two sets of wave recorders form a group to realize the main and backup functions. For the real-time embedded system platform, the device combines the IEC 61850 standard and the digital substation wave recording function to provide the general centralized wave recording function of the digital substation. The embedded software of the wave recorder completely complies with the logical node design of the IEC61850 standard, adopts object-oriented dynamic modeling technology, has built-in relevant logical nodes, supports free distribution of functions, and meets all communication requirements of the IEC61850 standard. The wave recorder converts the data message based on the IEC61850 standard into a common comtrade format wave recording file, and the man-machine interface of the wave recorder provides on-site wave recording analysis and wave recorder management functions. The wave recording analysis management software located at the station control layer, the communication adopts the IEC61850 standard, analyzes the wave recording files in the standard comtrade format, and provides powerful and rich data analysis functions. In addition to recording the real-time dynamic change process of the collected recording volume, and According to the recorded current, voltage and switching value, it can calculate the active power, reactive power, aperiodic component, system frequency change and fault distance of related components, output the analysis results, and manage the operating parameters and start-up settings of the oscilloscope , to provide protection for on-site operation.

The two components of the centralized wave recording system of the digitalized substation of the present invention can be used in combination or independently.

Therefore, the present invention proposes a centralized wave recording system for digital substations, which obtains the analog and switching data of all substations through the network, and performs centralized data recording and analysis on the data of all substations, including wave recorders and devices located in substations. The wave recording analysis management software of the control layer, the wave recorder adopts dual-machine, double-network redundant configuration, the hardware of the wave recorder adopts an embedded processor unit, multi-CPU parallel processing technology, provides dual Ethernet interfaces and RS232, RS485/422 interface, the oscilloscope will convert the data message based on the IEC61850 standard (substation communication network and system) into a common comtrade format oscilloscope file, and at the same time the man-machine interface of the oscilloscope provides on-site Wave recording analysis and wave recorder management functions. The wave recording analysis management software located at the station control layer uses the IEC61850 standard for communication, analyzes the wave recording files in the standard comtrade format, and records the real-time dynamics of the collected data. According to the recorded current, voltage and switching value, calculate the active power, reactive power, non-periodic component, system frequency change and fault distance of the relevant components, output the analysis results, and manage the operating parameters of the oscilloscope and Start setting.

According to the centralized wave recording system of the digital substation of the present invention, it is characterized in that: the wave recording analysis management software located at the station control layer is based on the fifth part of the IEC 61850 standard to build an information and communication model library.

The digital substation centralized wave recording system according to the present invention is characterized in that: the substation configuration language (SCL) is adopted, and a unified tool is used to configure and manage the wave recorder device.

The advantage of the present invention is that, for digital substations, based on the IEC 61850 standard, it is applicable to any level of its communication system; it can record all exchange data between the process layer and the interval layer of the substation; the new digital substation centralized wave recording system It has the advantages of digitalization, openness, easy maintenance and convenient expansion. At the same time, the analysis management software located at the station control layer can conveniently analyze and process the data and manage the wave recorder.

Description of drawings

Fig. 1 is the schematic diagram of wiring of the digitalized substation centralized wave recording system of the present invention;

Fig. 2 is the hardware structural representation of wave recorder of the present invention;

Fig. 3 is a schematic diagram of the function design module of the wave recording analysis management software of the present invention.

Detailed ways

The data collected by traditional fault recording devices are analog signals and switching values. The new digital substation centralized wave recording system collects data from IEC61850 messages. Therefore, the establishment of a general software and hardware platform based on IEC61850 becomes the key.

The wave recorder hardware according to the present invention adopts embedded processor unit, multi-CPU parallel processing technology, provides double Ethernet interface and RS232, RS485/422 interface, is used for debugging, maintenance, has high-speed processing, stable and reliable, rich in resources and Easy to expand features. Equipped with a local man-machine interface, it can realize the local management and data analysis of the oscilloscope.

The software structure of the digital substation centralized wave recording system of the present invention completely complies with the logical node design of the IEC61850 standard, adopts object-oriented dynamic modeling technology, has built-in relevant logical nodes, supports free distribution of functions, and meets all communication requirements of the IEC61850 standard. Equipped with a unified engineering system integration tool conforming to IEC61850 standard, it can analyze and generate SCL configuration files, and supports offline and online configuration. The device can statically establish a communication model based on the configuration information provided by the IED configuration file generated by the tool. Fully supports SCSM protocol stack: TCP/IP, UDP, IEEE802.3, etc.; adopts the self-developed MMS protocol stack, which can realize unified configuration and GPS time synchronization based on all substation systems.

The wave recording analysis management software located in the station control layer of the digital substation centralized wave recording system of the present invention provides a data analysis function. In addition to recording the real-time dynamic change process of the collected recording volume, it can also record according to the current, voltage, Switching quantity, calculate the active power, reactive power, non-periodic components of related components, system frequency change and fault distance, output the analysis results, and manage the operating parameters and start-up settings of the oscilloscope.

The invention has been described herein in terms of specific exemplary embodiments. Appropriate substitutions or modifications will be apparent to those skilled in the art without departing from the scope of the present invention. The exemplary embodiments are illustrative only, and not limiting of the scope of the invention, which is defined by the appended claims.

Claims (3)

1. A centralized wave recording system for digital substations, characterized in that the system obtains the analog and switching data of all substations through the network, and performs centralized data recording and analysis on the data of all substations; it includes a wave recorder device and Wave recording analysis management software located at the station control layer. The wave recorder adopts dual-computer and dual-network redundant configuration. The hardware of the wave recorder adopts embedded processor unit, multi-CPU parallel processing technology, and provides dual Ethernet interface and RS232, RS485/422 interface, the recorder will convert the data message based on the IEC61850 standard into a common comtrade format recording file, and the man-machine interface of the recorder provides on-site wave recording analysis and Wave recorder management function; the wave recording analysis management software located at the station control layer uses the IEC61850 standard for communication, analyzes the wave recording files in the standard comtrade format, records the real-time dynamic change process of the collected admission volume, and according to The recorded current, voltage, and switching value are used to calculate the active, reactive, and non-periodic components of the relevant components, the system frequency change, and the fault distance, output the analysis results, and manage the operating parameters and start-up settings of the oscilloscope. 2. The centralized wave recording system of digital substation according to claim 1, characterized in that: the wave recording analysis management software located at the station control layer is based on the fifth part of the IEC61850 standard to build an information and communication model library. 3. The digital substation centralized wave recording system according to any one of claims 1 and 2, characterized in that: the substation configuration language is adopted, and a unified tool is used to configure and manage the wave recorder device.

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