CN106300684A - A kind of intelligent integral towards transformer station's standby power system monitors method - Google Patents

Abstract

The invention discloses a kind of intelligent integral towards transformer station's standby power system and monitor method, integration power-supply system front-end acquisition device is utilized to complete the hetero-com-munication information aggregate of each power subsystem, and each for power supply subsystem monitors is combined in same monitor supervision platform, again on the basis of IEC61850 communication protocol, specification and perfect collection information, realize integration power-supply system comprehensive, accurate on line real-time monitoring, so guarantee the data information sharing between each power subsystem, and support intelligent diagnostics, the senior application functions such as analysis, finally realize the intellectuality of intelligent transformer station, networking requirement.

Description

An intelligent integrated monitoring method for substation backup power system

technical field

The invention belongs to the technical field of power system informatization, and more specifically relates to an intelligent integrated monitoring method for substation backup power systems.

Background technique

The traditional substation backup power management system, whose equipment is produced, installed, and debugged by different manufacturers, has problems such as incompatibility of communication protocols, poor sharing of data information, and low degree of automation. In addition, the monitoring information of the system is incomplete. It only realizes the monitoring of the basic "telemetry" and "remote signaling" parameters of the equipment, and does not realize the "remote control" function of the smart substation. Through the careful investigation and analysis of the substation backup power monitoring system currently in use, the following problems are summarized: (1) The online monitoring system is incomplete. The existing integrated power supply monitoring system mainly conducts online monitoring of the basic parameters of each device, and does not consider the online monitoring of modules such as bus feeders, inverters, and rectifiers. In actual operation, the integrated power supply monitoring system is incomplete, which will have serious consequences, such as the tripping of the circuit breaker of the bus feeder, and the protection and automatic devices will crash due to the high temperature of the operating environment. When the system fails, the protection and The automatic device may refuse to move, and a leapfrog trip may occur, causing an accident and causing economic and property losses. (2) The degree of automation is not high. The sub-system equipment of the integrated power system is produced, installed, and debugged by different suppliers. The communication protocols between them are generally incompatible, and it is difficult to share data information, and it is difficult to realize intelligent and networked functions of intelligent substations. (3) Lack of advanced application functions such as online diagnosis and analysis. If the system failure is not detected and dealt with in time, it may cause a module of the integrated power system to stop working, and even affect the safe and stable operation of the entire system. For example, when the battery pack or some batteries fail (undervoltage, insufficient SOC), the failure of the charging and discharging module or the inverter and rectifier module is not handled in time, which will cause the DC voltage loss of the entire power system, causing the protection and automatic devices to refuse to operate, and affecting the integrated power supply The system operates safely.

The new substation backup power system, drawing on the core idea of intelligent substations, fully integrates the traditional station power system, integrating AC power, uninterruptible power supply (UPS), inverter power, communication power, DC-DC power, common battery packs and The backup battery pack is designed, produced, debugged and monitored in a unified manner, and the intelligent equipment of each subsystem is connected to the integrated monitoring platform through the communication network to realize the intelligence, networking and information sharing of the intelligent substation. However, the existing substation backup power monitoring system is difficult to meet the basic requirements of smart substation intelligence, networking, and information sharing. It is urgent to invent an integrated power monitoring system engineering design method and application function system for smart substation backup power systems. At present, the IEC61850 protocol is an international standard for the communication network of smart substations. Its fundamental goal is to solve the interoperability and seamless connection of intelligent electronic devices (IEDs), and provide basic methods and standards for information interaction and model description of smart substations.

In recent years, some breakthroughs have been made in the substation information modeling method and application technology based on IEC61850. For example, some literature proposes to establish an IED information model for GIS status monitoring and analyze substation equipment The modeling of the IED of the online monitoring system, the realization method of data mapping between the design of the IED and the monitoring unit, or the database model is divided into three parts: the information model, the equipment model, and the application model. On the basis of the IEC61850 data class, the database information Modeling methods.

Some of the above research results show that the substation information modeling technology based on the IEC61850 protocol has gradually matured, but there is little research on the information model and standardized access of the substation integrated power system.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide an intelligent integrated monitoring method for the substation backup power system. Based on the IEC61850 communication protocol, standardize and improve the collected information, and realize the online real-time monitoring of the intelligent integrated power system .

In order to achieve the above-mentioned purpose of the invention, the present invention is an intelligent integrated monitoring method for substation backup power supply system, which is characterized in that it includes the following steps:

(1), the online monitoring platform uses the Ethernet interface to send the state acquisition command of the intelligent integrated power system to the front-end acquisition device of the integrated power system;

(2) The IEC61850 protocol converter in the front-end acquisition device of the integrated power supply system converts the acquisition command into the corresponding CAN or MODBUS protocol data packet, and then forwards it to the information acquisition module through the monitoring host, and the information acquisition module reads the CAN or MODBUS protocol The collection instruction in the data packet, and use the RS485, RS232 communication interface to collect data from each subsystem of the intelligent integrated power supply system according to the collection instruction;

(3) Pack the collected data of each subsystem of the intelligent integrated power supply system into CAN or MODBUS protocol data packets and send them back to the information collection module through the RS485 or RS232 communication interface, and forward them to the IEC61850 protocol converter through the monitoring host;

(4) The IEC61850 protocol converter converts CAN or MODBUS protocol data packets into recognizable model data for smart substations;

(4.1), the IEC61850 protocol converter reads CAN or MODBUS protocol data packets, encodes and encapsulates the data, and then converts the encoded and encapsulated data into IEC61850 protocol data packets;

(4.2) Model the intelligent integrated power supply system according to the IEC61850 protocol, and convert the IEC61850 protocol data packet into model data recognizable by the smart substation;

(4.2.1), according to the requirements of intelligent substations and the IEC61850 protocol, the functions of the intelligent integrated power supply system are divided into six energy model subsystems: storage battery, AC power supply, DC power supply, communication power supply, UPS power supply, and inverter power supply;

(4.2.2), build intelligent electronic device IED information model for each energy model subsystem;

According to the actual function of each energy model subsystem and the logical structure of the system, determine the logical node LN of each IED, and then allocate the LN to the actual IED of the intelligent integrated power system, and then determine according to the logical connection between the LNs Communication methods between IEDs;

(4.2.3) Use the IEC61850 protocol to describe the intelligent substation configuration description language SCL, and then describe the IED of the intelligent integrated power supply system. The description includes logical node classes, data objects DO, and data attributes DA;

Then carry out IEC6185 engineering configuration for the intelligent integrated power system; the configuration process is that each power device IED generates the ICD file of the device through its own configuration tool, imports the ICD file and the manually configured SSD file into the local system configuration tool, and generates the SCD file , and then import the SCD file into the respective configuration tool, export the CID file of the equipment device, download it to the IEC61850 protocol converter and run it, and configure the language description of each power supply equipment IED;

(5) The online monitoring platform monitors and displays the received data, and at the same time, the online monitoring platform also sends remote control commands to the IEC61850 protocol converter, which are decoded by the IEC61850 protocol converter and forwarded to the monitoring host to realize the remote control function of the integrated power supply system.

The purpose of the invention of the present invention is achieved like this:

The present invention is an intelligent integrated monitoring method oriented to substation backup power supply system, which uses the front-end acquisition device of the integrated power supply system to complete the collection of heterogeneous communication information of each power supply subsystem, and collects the monitoring of each subsystem of the power supply on the same monitoring platform, and then Based on the IEC61850 communication protocol, standardize and improve the collected information, and realize the comprehensive and accurate online real-time monitoring of the integrated power supply system, so as to ensure the data information sharing among the power supply subsystems, and support advanced application functions such as intelligent diagnosis and analysis. Finally, the intelligent and networked requirements of the intelligent substation will be realized.

Description of drawings

Fig. 1 is a kind of intelligent integrated monitoring framework diagram of the present invention facing substation backup power supply system;

Figure 2 is a schematic diagram of the front-end acquisition device of the integrated power supply system;

Figure 3 is a flow chart of IEC64850 protocol conversion;

Figure 4 is a schematic diagram of dividing the functions of the intelligent integrated power supply system into six functional model subsystems;

Figure 5 is a flow chart of SCL configuration.

detailed description

Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings, so that those skilled in the art can better understand the present invention. It should be noted that in the following description, when detailed descriptions of known functions and designs may dilute the main content of the present invention, these descriptions will be omitted here.

Example

For the convenience of description, the relevant technical terms appearing in the specific implementation are explained first:

IEC61850 (International Electrotechnical Committee): An international standard for substation communication networks and systems formulated by the International Electrotechnical Commission

CAN(Controller Area Network): Controller Area Network

MODBUS: network communication protocol

IED (Intelligent Electronic Device): intelligent electronic device

LN (Logical Node): logical node

DO(Data Object): data object

DA (Data Attribute): data attribute

ICD (IED Capability Description): IED capability description

SCD (Substation Configuration Description): total station system configuration description

SSD (System Specification Description): system specification description.

Fig. 1 is a structure diagram of an intelligent integrated monitoring system oriented to a substation backup power supply system according to the present invention.

In this embodiment, as shown in Figure 1, the present invention is an intelligent integrated monitoring method for the substation backup power system, which integrates the monitoring of each subsystem of the intelligent integrated power system on the same platform, and the IEC61850 communication protocol is Benchmark, standardize and improve the collected information, realize the comprehensive and accurate online real-time monitoring of the integrated power supply system, ensure the sharing of data information among the subsystems, and support advanced application functions such as intelligent diagnosis and analysis, and finally realize the intelligence of the intelligent substation and networking requirements.

Among them, as shown in Figure 1, the intelligent integrated power supply system includes an AC power supply subsystem, a DC power supply subsystem, a communication power supply subsystem, an uninterruptible power supply (UPS) subsystem, an inverter power supply subsystem, and a storage battery subsystem.

The equipment in the system is manufactured, installed, and debugged by different suppliers, and generally adopts independent design methods. Therefore, the collection information and control information of the operation status of each equipment are concentrated in the front-end acquisition device of the integrated power system to realize the unification of information of each equipment Acquisition and control of equipment operating status. The front-end acquisition device of the integrated power supply system includes communication interfaces such as RS485, RS232, CAN bus, and Ethernet, among which the communication interfaces of RS485, RS232, and CAN bus are used for It communicates with the intelligent integrated power system online monitoring platform or remote substation, and its communication protocol adopts the IEC61850 protocol to ensure the unification of communication standards and protocols among subsystems, and realize the barrier-free communication between each subsystem and the monitoring platform.

The intelligent integrated power supply monitoring system mainly realizes the real-time monitoring and intelligent alarming of the operating status information of subsystem equipment such as AC power supply, DC power supply, and communication power supply. Among them, real-time monitoring displays the operating status of each subsystem equipment through graphics, numbers, curves, and wiring diagrams, and sends relevant control instructions through mouse and keyboard operations on the monitoring interface to realize online control of each subsystem equipment; intelligent Alarm, through graphics, numbers, and curves, realizes timely alarms for remote signaling, telemetry, and remote control of each subsystem.

An intelligent integrated monitoring method for a substation backup power supply system of the present invention will be described in detail below, which specifically includes the following steps:

(1), the online monitoring platform uses the Ethernet interface to send the state acquisition command of the intelligent integrated power system to the front-end acquisition device of the integrated power system;

(2) The IEC61850 protocol converter in the front-end acquisition device of the integrated power supply system converts the acquisition command into the corresponding CAN or MODBUS protocol data packet, and then forwards it to the information acquisition module through the monitoring host, and the information acquisition module reads the CAN or MODBUS protocol The collection instruction in the data packet, and use the RS485, RS232 communication interface to collect data from each subsystem of the intelligent integrated power supply system according to the collection instruction, wherein the collected data includes digital quantity collection, analog quantity collection and switch quantity collection;

(3) Pack the collected data of each subsystem of the intelligent integrated power supply system into CAN or MODBUS protocol data packets and send them back to the information collection module through the RS485 or RS232 communication interface, and forward them to the IEC61850 protocol converter through the monitoring host;

In the above three steps, the information acquisition module, the monitoring host and the IEC61850 protocol converter together constitute the front-end acquisition device of the integrated power system, as shown in Figure 2;

Among them, the monitoring host adopts the framework of downlink serial port channel and uplink serial port channel; the downlink serial port channel accesses the information acquisition module through RS232, RS485 and CAN to collect and manage status data; the uplink serial port channel sends status data in different formats to IEC61850 Protocol converter, and convert IEC61850 protocol;

As shown in Figure 3, the IEC61850 protocol converter implements the mapping and conversion functions of the data exchange interface and data format. The conversion process is: converting various data communication protocols such as RS232 and RS485 of the corresponding intelligent electronic device (IED) into the IEC61850 standard The communication protocol realizes the management of various IEDs in the integrated power supply system and the interconnection and interoperability between devices; on the one hand, the collected information sent by the monitoring host is encoded and packaged according to the agreed protocol, and sent to the monitoring platform; The instructions issued by the monitoring platform are decoded and sent to the monitoring host to realize real-time telemetry, remote signaling and remote control. The protocol converter is integrated inside the monitoring host;

(4) The IEC61850 protocol converter converts CAN or MODBUS protocol data packets into recognizable model data for smart substations;

(4.1), the IEC61850 protocol converter reads CAN or MODBUS protocol data packets, encodes and encapsulates the data, and then converts the encoded and encapsulated data into IEC61850 protocol data packets;

(4.2) Model the intelligent integrated power supply system according to the IEC61850 protocol, and convert the IEC61850 protocol data packet into model data recognizable by the smart substation;

(4.2.1), according to the requirements of intelligent substations and the IEC61850 protocol, the functions of the intelligent integrated power supply system are divided into six energy model subsystems: storage battery, AC power supply, DC power supply, communication power supply, UPS power supply, and inverter power supply;

As shown in Figure 4, the AC power supply and UPS power supply can be divided into transformer and UPS power supply operating status monitoring, AC incoming line, busbar, feeder line, bypass incoming line operating state monitoring, and AC automatic switching device operating state monitoring; DC power supply And the communication power supply is decomposed into silicon step-down device and DC/DC power supply operation status monitoring, DC incoming line, bus bar, feeder line state monitoring; inverter power supply is decomposed into inverter operating state monitoring, AC incoming line, bus bar, feeder line, bypass Incoming line running status monitoring, and DC incoming line running status monitoring; battery monitoring is decomposed into charging machine running status monitoring, single battery, battery pack status monitoring, DC incoming line, busbar, and feeder status monitoring;

(4.2.2), build intelligent electronic device IED information model for each energy model subsystem;

According to the actual function of each energy model subsystem and the logical structure of the system, determine the logical node LN of each IED, and then allocate the LN to the actual IED of the intelligent integrated power system, and then determine according to the logical connection between the LNs Communication methods between IEDs;

(4.2.3) Use the IEC61850 protocol to describe the intelligent substation configuration description language SCL, and then describe the IED of the intelligent integrated power supply system. The description includes logical node classes, data objects DO, and data attributes DA;

Then configure the IEC6185 project for the intelligent integrated power supply system; as shown in Figure 5, the configuration process is that each power supply device IED generates the ICD file of the device through its own configuration tool, and imports the ICD file and manually configured SSD file into the local system The configuration tool generates SCD files, and then imports the SCD files into their own configuration tools, exports the CID files of the equipment, downloads them to the IEC61850 protocol converter, and completes the language description of each power supply equipment IED;

(5) The online monitoring platform monitors and displays the received data, and at the same time, the online monitoring platform also sends remote control commands to the IEC61850 protocol converter, which are decoded by the IEC61850 protocol converter and forwarded to the monitoring host to realize the remote control function of the integrated power supply system.

Although the illustrative specific embodiments of the present invention have been described above, so that those skilled in the art can understand the present invention, it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, As long as various changes are within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

Claims (3)

1. the intelligent integral towards transformer station's standby power system monitors method, it is characterised in that comprise the following steps:

(1), on-line monitoring platform utilizes Ethernet interface to send the instruction of intelligent integral power-supply system state acquisition to integration Power-supply system front-end acquisition device；

(2), acquisition instructions is converted to correspondence by the IEC61850 protocol converter in integration power-supply system front-end acquisition device CAN or MODBUS protocol data bag, then be forwarded to information acquisition module by monitoring host computer, information acquisition module reads Acquisition instructions in CAN or MODBUS protocol data bag, and utilize RS485, RS232 communication interface according to acquisition instructions to intelligence The each subsystem of integration power-supply system carries out data acquisition；

(3), the collection data of each for intelligent integral power-supply system subsystem are packaged as CAN or MODBUS protocol data bag to pass through The anti-information acquisition module of delivering to of RS485 or RS232 communication interface, and it is forwarded to the conversion of IEC61850 stipulations by monitoring host computer Device；

(4), CAN or MODBUS protocol data bag is converted into the discernible model of intelligent substation by IEC61850 protocol converter Data；

(4.1), IEC61850 protocol converter read CAN or MODBUS protocol data bag, and carry out data encoding, encapsulation, then Data after coding, encapsulation are converted to IEC61850 protocol data bag；

(4.2), according to IEC61850 agreement stipulations, intelligent integral power-supply system is modeled, by IEC61850 protocol data Bag is converted into the discernible model data of intelligent substation；

(4.2.1), according to the requirement of intelligent transformer station and IEC61850 agreement stipulations, by intelligent integral power-supply system function Be divided into electric power storage, alternating current power supply, DC source, communication power supply, ups power, inverter six can model subsystem；

(4.2.2), each model subsystem can be built intelligent electronic device IED information model；

Actual functional capability according to each energy model subsystem and system logic structure relation, determine the logic joint of each IED Point LN, then in the IED of the intelligent integral power-supply system that LN is assigned to reality, then connect according to the logic between LN and determine Communication mode between IED；

(4.2.3), utilize IEC61850 agreement stipulations that intelligent substation configuration is described language SCL, and then to intelligent integral The IED of power-supply system is described, and describes content and includes logical node class, data object DO, data attribute DA；

Then intelligent integral power-supply system is carried out IEC61850 engineering configuration；Its configuration flow is that each power-supply device IED leads to Cross the configuration tool respectively carried and generate the ICD file of equipment, the SSD file of ICD file and manual configuration is imported local system Configuration tool, generates SCD file, then SCD file imports the configuration tool respectively carried, the CID file of equipment leading out device, under Being downloaded in IEC61850 protocol converter run, the language having configured each power-supply device IED describes；

(5), on-line monitoring platform the data received are monitored display, on-line monitoring platform also sends telecommand extremely simultaneously IEC61850 protocol converter, is transmitted to monitoring host computer, it is achieved integrated power supply after IEC61850 protocol converter decodes System remote control function.

A kind of intelligent integral towards transformer station's standby power system the most according to claim 1 monitors method, and it is special Levying and be, described information acquisition module, monitoring host computer and IEC61850 protocol converter collectively form integration power-supply system Front-end acquisition device；

Wherein, described monitoring host computer, use descending serial ports passage and the framework of up serial ports passage；Descending serial ports passage passes through RS232, RS485, CAN access information acquisition module, carry out collection and the management of status data；Up serial ports passage is by not apposition The status data of formula sends to IEC61850 protocol converter, and carries out the conversion of IEC61850 agreement.

A kind of intelligent integral towards transformer station's standby power system the most according to claim 1 monitors method, and it is special Levy and be, in described step (2), each power subsystem is carried out data acquisition, specifically include digital data acquisition, analog quantity is adopted Collection and switch acquisition.