CN102937685B - The integrated testing platform of a kind of transformer station based on Real-time Simulation Technology - Google Patents

Abstract

An integrated test platform based on real-time simulation technology for substations. The data network card is connected to the merging unit module and the intelligent terminal module respectively through cable connections. The merging unit module is respectively connected to the message recording analysis and playback device, The digital measurement and control device is connected to the main transformer protection module, the intelligent terminal module is respectively connected to the message recording analysis and playback device, the digital measurement and control device and the main transformer protection module through the GOOSE optical fiber, the message recording analysis and playback device, the digital measurement and control device and the main transformer The protection module is connected with the monitoring background and the protection sub-station through the monitoring information exchange. Based on the real-time simulation system, the present invention controls and transmits signals to the interval layer and station control layer equipment through the set merging unit module and intelligent terminal module to form a complete set of intelligent test platform, and its detection results are accurate and effective. It is suitable for the simulation test field of substations of various smart grids.

Description

An integrated test platform based on real-time simulation technology for substations

technical field

The invention relates to a simulation test device, in particular to a simulation device using real-time simulation technology used in substations.

Background technique

With the increasing development of modernization, the smart grid technology for its supporting construction is also changing with each passing day. Among them, the requirements for the substation of the smart grid are getting higher and higher, not only to ensure real-time and comprehensive information collection and reliable and accurate command execution, but also With the significant and general improvement and gradual formation of substation informatization and automation, the command function of the advanced dispatching center can be fully realized, the execution ability can be improved, and the entire power grid can gradually form characteristics such as strong, self-healing, and flexible, and gradually develop into a smart grid. .

With the construction of substations, it gradually has the ability and possibility to control complex large power grids. Substations need many control functions, including power distribution optimization, online analysis, early warning of accidents, emergency handling, post-event recovery, etc., all rely on the scientific and rapid decision-making of the smart grid, and the decision-making of the smart grid first requires timely , sufficient power grid information, and the smart substation will be responsible for collecting various real-time and non-real-time information of the power grid, and send it to the smart grid according to the classification and transmission requirements of transient, dynamic and static. On the other hand, the execution power and execution efficiency of smart grid decision-making also largely fall on the smart substation, and most of the final realization of various controls needs to be completed by the smart substation.

To sum up, the test of the operation of the substation is the basis for the safe and effective operation of the entire substation, but there is currently a lack of an effective test method that can not only combine and configure the models of various power equipment in the substation, but also can It is a device that simulates various working conditions of the power system in real time, and can amplify the generated signal into the voltage and current that can be measured by the actual control and protection system, and interact with the external control system through the switch.

Contents of the invention

In order to solve the problems existing in the test of the operation status of the substation in the prior art, the present invention provides an integrated test platform based on real-time simulation technology for the substation. The system basis of the test platform is a real-time simulation system. The real-time simulation system provides models of various power equipment, and by combining and configuring these models, it can simulate various working conditions of the power system in real time, and can perform real-time simulation calculations for 640 electrical nodes. Power amplifier, the real-time simulation system can amplify the generated signal into the voltage and current that can be measured by the actual control and protection system, and interact with the external control system through the switch. Concrete structure of the present invention is as follows:

An integrated test platform based on real-time simulation technology for substations, including a data network card with functions of information input and output and sampled value transmission for a real-time simulation system, characterized in that:

The data network board is respectively connected to the merging unit module and the intelligent terminal module through cable connection;

The data network board provides the test function of the quality word of the sampling value data, that is, during the simulation process, the quality word of each sampling value data can be dynamically changed, and it is also possible to choose whether to set the sampling rate in the sampling value data frame.

The merging unit module is respectively connected with the message recording analysis and playback device, the digital measurement and control device and the main transformer protection module through the special optical fiber for the sampling value;

The intelligent terminal module is respectively connected with the message recording analysis and playback device, the digital measurement and control device and the main transformer protection module through the GOOSE optical fiber;

The above-mentioned GOOSE is the abbreviation of GenericObjectOrientedSubstationEvent, that is, "generic object-oriented substation event".

The above message recording analysis and playback device has the following functions: voltage and current waveform recording function, secondary equipment action behavior recording function, waveform analysis function and abnormal alarm function.

The above-mentioned digital measurement and control device realizes an interval of three-state data acquisition and control. The device not only completes the conventional telecontrol functions such as steady-state data acquisition, state signal acquisition, remote control operation, synchronous operation, knife switch control, and anti-misoperation locking operation, It also realizes synchrophasor acquisition and calculation, fault recording function, power quality function, etc. It is a multi-functional compartment layer intelligent electronic device for standardization and data sharing.

The above-mentioned transformer protection principle of the main transformer protection module has been successfully applied in the field for nearly ten years, and is suitable for transformers with various wiring modes of 110kV and above voltage levels. The device can support electronic transformers and conventional transformers, support the power industry communication standard DL/T667-1999 (IEC60870-5-103) and the new generation substation communication standard IEC61850, support GOOSE input and output functions, and support distributed protection configuration mode.

The message recording analysis and playback device, the digital measurement and control device and the main transformer protection module are connected to the monitoring background and the protection sub-station through the monitoring information switch.

The above-mentioned monitoring background is a communication controller developed for the external telecontrol function of the substation. It is used to collect the data of the whole station measurement and control unit, protection device and intelligent electronic equipment. -5-104, Ministerial CDT, MODBUS and other protocols are transmitted to the dispatching end/centralized control station through analog channels, digital channels or networks, and at the same time receive remote control and remote adjustment commands from the dispatching end/centralized control station and forward them to substation equipment.

The protection sub-station mentioned above is used for communication transfer and protocol conversion between various relay protection devices and other devices, protection information master station and relay protection engineer station. The protection sub-station communicates the information connection between the protection, data acquisition, fault recorder and other devices with the protection information master station or relay protection engineer station system through various types of standard communication interfaces, and saves the protection information and fault waveforms , for historical query and fault analysis. The protection substation supports a variety of communication protocols, and can not only communicate with intelligent protection and wave recorders, but also be compatible with conventional protection.

According to an integrated test platform for a substation based on real-time simulation technology of the present invention, the merging unit module includes an analog voltage signal acquisition device, an analog sampling value switch, and a 1588 clock synchronization module, wherein one end of the analog voltage signal acquisition device passes through The cable connection is connected with the data network card, and the other end of the analog voltage signal acquisition device transmits its analog voltage signal to the analog sampling value switch, and the analog sampling value switch transmits the signal to the message record analysis and playback through the special optical fiber for sampling value device, digital measurement and control device and main transformer protection module, while the 1588 clock synchronization module is connected with the analog sampling value switch and performs clock synchronization control on it.

According to an integrated test platform based on real-time simulation technology for a substation of the present invention, the analog voltage signal acquisition device includes a 500KV analog voltage unit, a 220KV analog voltage unit and a 35KV analog voltage unit.

The above-mentioned merging unit module is compatible with electronic transformers and conventional transformer interfaces, and can convert the voltage and current signals output by the real-time simulation system into digital signals that meet the requirements of smart substations. The merging unit module can send a Line ABC three-phase measurement and protection current and voltage data, the transmission protocol follows the IEC61850-9-2 or IEC60440-8 standard, the merging unit module design is flexible and universal, can support multiple manufacturers and a variety of electronic transformer interfaces, and It can simulate the needs of various electronic transformer configurations in substations of 500KV, 220kV and 35KV levels.

According to an integrated test platform based on real-time simulation technology for a substation of the present invention, the intelligent terminal module includes a GOOSE signal conversion terminal and a GOOSE signal switch, wherein one end of the GOOSE signal conversion terminal is connected to a data network card through a cable connection , the other end transmits the signal to the GOOSE signal switch through the GOOSE optical fiber, and the GOOSE signal switch transmits the signal to the message recording analysis and playback device, the digital measurement and control device and the main transformer protection module through the GOOSE optical fiber.

The purpose of the design here is that, since in the smart substation, the switches output by the protection and measurement and control devices, the control commands of the switch and the position signals of the switch and the switch are all transmitted in the form of GOOSE signals, the intelligent terminal module is responsible for GOOSE and air The node signal is converted.

Using a substation of the present invention with an integrated test platform based on real-time simulation technology has obtained the following beneficial effects:

1. A substation of the present invention uses an integrated test platform based on real-time simulation technology, based on the real-time simulation system, through the merging unit module and the intelligent terminal module that are set to control and transmit signals to the interval layer and station control layer equipment, A complete set of intelligent test platform is formed, and the test results are accurate and effective;

2. An integrated test platform based on real-time simulation technology for substations of the present invention, capable of performing device-level and system-level tests.

Description of drawings

Fig. 1 is the overall structure schematic diagram of a kind of substation of the present invention based on the integrated test platform of real-time simulation technology;

FIG. 2 is a data model of a merged unit module of an integrated test platform based on real-time simulation technology for a substation according to the present invention.

In the figure: 1-data network board, 2-merging unit module, 2a-analog voltage signal acquisition device, 2b-analog sampling value switch, 2c-1588 clock synchronization module, 3-intelligent terminal module, 3a-GOOSE signal conversion terminal , 3b-GOOSE signal switch, 4-message record analysis and playback device, 5-digital measurement and control device, 6-main transformer protection module, 7-monitoring information switch, 8-monitoring background, 9-protection substation.

Detailed ways

An integrated test platform based on real-time simulation technology for a substation of the present invention will be further described below in conjunction with the drawings and embodiments.

Example

As shown in Figures 1 and 2, an integrated test platform based on real-time simulation technology for a substation includes a data network card 1 with functions of information input and output and sampled value transfer for a real-time simulation system. The card is respectively connected with the merging unit module 2 and the intelligent terminal module 3 through cable connection;

The data network board card in this embodiment is a GTNET card, and GTNET supports 32 channels of GOOSE signal input/output. Different from other testers, GTNET card needs to read an SCD file when configuring GOOSE signal, and this file needs to contain all the definitions of input GOOSE and the definition of corresponding output GOOSE signal IED. The GTNET card also provides a test function for the quality word of sampled value data, that is, during the simulation process, the quality word of each channel of sampled value data can be dynamically changed, and it is also possible to choose whether to set the sampling rate in the sampled value data frame.

The merging unit module 2 is respectively connected with the message recording analysis and playback device 4, the digital measurement and control device 5 and the main transformer protection module 6 through a dedicated optical fiber for sampling values;

The intelligent terminal module 3 is respectively connected with the message recording analysis and playback device, the digital measurement and control device and the main transformer protection module through the GOOSE optical fiber;

The above-mentioned message record analysis and playback device 4 has the following functions:

(1) Voltage and current waveform recording function: analyze the sampling value message of the process layer network, extract the value of the instantaneous sampling point, perform Fourier calculation and start-up calculation. When a fault occurs in the power system and the fault start condition is met, the sampling value and switching value when the fault occurs are stored and recorded in the COMTRADE format, and the display and analysis of the system fault waveform is realized by the graphic analysis software.

(2) Secondary equipment action behavior recording function: analyze the GOOSE message of the process layer network, extract the switching value status information of the GOOSE message, and when the switching value status changes, the sampled value message and Analyze the GOOSE message, and store and record the sampling value and switching value when the fault occurs in the COMTRADE format, and use the graphic analysis software to realize the display and analysis of the system fault waveform.

(3) Waveform analysis function: The transient waveform data recorded by the device is output in COMTRADE format. Using our company's copyrighted CAAP2008 waveform analysis software, it can realize single-ended ranging, double-ended ranging, harmonic analysis, impedance analysis, power Advanced analysis functions such as analysis, vector analysis, differential current analysis, transformer overexcitation analysis, non-periodic component analysis, etc. The formula editor built in CAAP2008 provides more than 50 commonly used functions, which can realize user-defined analysis algorithms.

(4) Abnormal alarm function:

1) Detailed listing alarm on the HMI main interface: Indicate the alarm situation on the HMI main interface, such as the alarm of message content error, message abnormality, wave recording start, etc.

2) The general alarm of the relay is issued by the hard contact: the alarm signal is issued by the hard contact, which can ensure the reliability of the alarm signal.

3) Detailed soft alarm data set issued by GOOSE: send an alarm by sending a GOOSE message, and define the detailed meaning of the alarm in the data set of the GOOSE message. It can perform message timeout alarm, message abnormal alarm, wave recording start, etc.

The above-mentioned digital measurement and control device 5 realizes the three-state data acquisition and control of an interval, and the device not only completes the conventional telecontrol functions such as steady-state data acquisition, state signal acquisition, remote control operation, synchronous operation, knife switch control, and anti-misoperation locking operation , and can also realize synchrophasor acquisition and calculation, fault recording function, power quality function, etc. It is a multi-functional compartment layer intelligent electronic device for standardization and data sharing.

The above-mentioned transformer protection principle of the main transformer protection module 6 has been successfully applied in the field for nearly ten years, and is applicable to transformers with voltage levels of 110kV and above in various wiring modes. The device can support electronic transformers and conventional transformers, support the power industry communication standard DL/T667-1999 (IEC60870-5-103) and the new generation substation communication standard IEC61850, support GOOSE input and output functions, and support distributed protection configuration mode.

The main transformer protection module can provide all the power protection required by a transformer, and the main protection and backup protection can share the same TA. These protections include: steady-state ratio differential, differential quick break, power frequency variation ratio differential, composite voltage blocking directional overcurrent, zero sequence directional overcurrent, zero sequence overvoltage, gap zero sequence overcurrent and simple bus differential. In addition, it also includes the following abnormal alarm functions: overload alarm, start cooler, overload blocking on-load voltage regulation, differential current abnormal alarm, differential circuit TA disconnection, TA abnormal alarm and TV abnormal alarm.

The message recording analysis and playback device, the digital measurement and control device and the main transformer protection module are connected to the monitoring background 8 and the protection sub-station 9 through the monitoring information switch 7 .

The above-mentioned monitoring background 8 is a communication controller developed for the external telecontrol function of the substation. It is used to collect the data of the whole station measurement and control unit, protection device and intelligent electronic equipment. IEC60870-5-104, ministerial CDT, MODBUS and other protocols are transmitted to the dispatching end/central control station through analog channels, digital channels or networks, and at the same time receive remote control and remote adjustment commands from the dispatching end/central control station and forward them to substation equipment.

The telecontrol information in the monitoring background adopts the method of "direct acquisition and direct delivery". The operation of the telecontrol communication device is independent of the background monitoring system, and the two parties do not affect each other. The monitoring background used in this embodiment is the RCS-9698G/H telecontrol communication device, which supports IEC61850 at the station control layer and is compatible with IEC60870-5-101IEC60870-5-103 and other protocols.

The functions of the remote communication device mainly include:

(1) Collect various microcomputer protection and automatic device information:

The RCS-9698G/H remote communication device used in this embodiment can communicate with various microcomputer protection and automatic devices through serial ports or networks, and receive various information sent by them, such as protection action SOE, etc.

(2) Collect information of various measurement and control devices and smart watt-hour meters:

The RCS-9698G/H telecontrol communication device used in this embodiment can communicate with the measurement and control device and the smart energy meter through a serial port or a network. The remote signaling, telemetry, remote pulse quantity and other communication information of the measurement and control device and the smart watt-hour meter are directly sent to the device.

(3) Collect substation intelligent auxiliary equipment information:

In addition to protection, measurement and control, watt-hour meters, and automation devices, there are many auxiliary devices in the substation. Although the information of these auxiliary devices is not as important as the system operation information, in order to improve the safety and reliability of substation operation, such information is usually sent to the RCS-9698G/H telecontrol communication device to collect these information and realize remote monitoring .

(4) Remote command record and query:

The RCS-9698G/H telecontrol communication device used in this embodiment can record all commands from the control source, including remote selection, remote execution, remote adjustment, modification of setting selection, modification of setting execution, signal reset, etc. The information can be retrieved and viewed through various query conditions.

(5) Realize and manage telecontrol communication, and communicate with centralized control center:

The RCS-9698G/H telecontrol communication device used in this embodiment undertakes the task of communication with dispatching and centralized control center computer systems, and can be connected to multi-level dispatching, and the information can be customized according to the requirements of each dispatching terminal.

The above-mentioned protection sub-station 9 is used for communication transfer and protocol conversion between various relay protection devices and other devices, protection information master station and relay protection engineer station. The protection sub-station communicates the information connection between the protection, data acquisition, fault recorder and other devices with the protection information master station or relay protection engineer station system through various types of standard communication interfaces, and saves the protection information and fault waveforms , for historical query and fault analysis. The protection substation supports a variety of communication protocols, and can not only communicate with intelligent protection and wave recorders, but also be compatible with conventional protection.

The functions of the protection substation mainly include: data processing and forwarding, fixed value management, storage and retrieval of fault waveforms, historical event recording and query, execution of master station commands, remote command recording and query, communication with the relay protection engineer station, realization of Communication with the protection information master station, etc.

The merging unit module 2 includes an analog voltage signal acquisition device 2a, an analog sampling value switch 2b and a 1588 clock synchronization module 2c, wherein one end of the analog voltage signal acquisition device is connected with the data network board 1 through cable connection, and the other end of the analog voltage signal acquisition device One end transmits its analog voltage signal to the analog sampling value switch, and the analog sampling value switch transmits the signal to the message recording analysis and playback device 4, the digital measurement and control device 5 and the main transformer protection module 6 through the special optical fiber for sampling value, and the 1588 The clock synchronization module is connected with the analog sampling value switch and performs clock synchronization control on it.

The analog voltage signal acquisition device 2a includes a 500KV analog voltage unit, a 220KV analog voltage unit and a 35KV analog voltage unit.

The above-mentioned merging unit module is compatible with electronic transformers and conventional transformer interfaces, and can convert the voltage and current signals output by the real-time simulation system into digital signals that meet the requirements of smart substations. The merging unit module can send a Line ABC three-phase measurement and protection current and voltage data, the transmission protocol follows the IEC61850-9-2 or IEC60440-8 standard, the merging unit module design is flexible and universal, can support multiple manufacturers and a variety of electronic transformer interfaces, and It can simulate the needs of various electronic transformer configurations in substations of 500KV, 220kV and 35KV levels.

The intelligent terminal module 3 includes a GOOSE signal conversion terminal 3a and a GOOSE signal switch 3b, wherein one end of the GOOSE signal conversion terminal is connected to the data network card 1 through a cable connection, and the other end transmits the signal to the GOOSE signal switch through the GOOSE optical fiber, and the GOOSE signal The switch transmits the signal to the message recording analysis and playback device 4, the digital measurement and control device 5 and the main transformer protection module 6 through the GOOSE optical fiber.

The purpose of the design here is that, since in the smart substation, the switches output by the protection and measurement and control devices, the control commands of the switch and the position signals of the switch and the switch are all transmitted in the form of GOOSE signals, the intelligent terminal module is responsible for GOOSE and air The node signal is converted. The main functions of the intelligent terminal module are as follows:

(1) The circuit breaker trips and closes. The device has a group of TJQ tripping outlets, TJR tripping outlets and reclosing outlets, where TJQ is the tripping outlet for non-blocking reclosing, and TJR is the tripping outlet for locking reclosing.

The device receives various GOOSE commands sent by the protection, including TJQ tripping, TJR tripping and reclosing commands, and then drives the corresponding exit relays to convert the GOOSE commands into hard contact output.

(2) Remote control output. The device has 33 outlets. In addition to the circuit breaker tripping, closing and locking outlets, it also has 4 spacer blades and 4 ground blades for remote control opening, closing, and locking. A total of 24 outlet contacts.

The device receives various GOOSE commands from measurement and control, including opening and closing of circuit breakers, opening and closing of spacers and floor switches, and locking control commands, and then drives the corresponding exit relays to convert GOOSE commands into hard contact output.

(3) Remote signal input. The device has 54 switching inputs, which can collect the circuit breaker position, knife switch position, circuit breaker mechanism and main transformer body signals on the spot, and send them to the corresponding protection and measurement and control devices through the GOOSE network.

An integrated test platform based on real-time simulation technology for a substation of the present invention is based on the real-time simulation system, through the set merging unit module 2, intelligent terminal module 3 pairs of interval layers (message record analysis and playback device 4, digital measurement and control Device 5 and main transformer protection module 6), station control layer (monitoring information switch 7, monitoring background 8 and protection substation 9) equipment for signal control and transmission, constitute a complete set of intelligent test platform, and its detection results are accurate It is effective, and the invention can perform device-level and system-level tests, and is suitable for the simulation test field of substations of various smart grids.

Claims (1)

1. a substation uses an integrated test platform based on real-time simulation technology, comprising a data network board (1) with information input and output and sampling value transfer functions for real-time simulation system, characterized in that: The data network board (1) is respectively connected with the merging unit module (2) and the intelligent terminal module (3) through cable connection; The merging unit module (2) is respectively connected with the message recording analysis and playback device (4), the digital measurement and control device (5) and the main transformer protection module (6) through the special optical fiber for the sampling value; Described intelligent terminal module (3) is respectively connected with message recording analysis and playback device (4), digital measurement and control device (5) and main transformer protection module (6) by GOOSE optical fiber; The message recording analysis and playback device (4), the digital measurement and control device (5) and the main transformer protection module (6) are connected to the monitoring background (8) and the protection substation (9) through the monitoring information switch (7) ; Described merging unit module (2) comprises analog voltage signal acquisition device (2a), analog sampling value exchange (2b) and 1588 clock synchronous module (2c), wherein one end of analog voltage signal acquisition device (2a) connects with by cable connection The data network board (1) is connected, and the other end of the analog voltage signal acquisition device transmits its analog voltage signal to the analog sampling value switch, and the analog sampling value switch transmits the signal to the message record analysis and playback through the special optical fiber for sampling value device (4), digital measurement and control device (5) and main transformer protection module (6), while the 1588 clock synchronization module (2c) is connected with the analog sampling value switch and performs clock synchronization control on it; Described intelligent terminal module (3) comprises GOOSE signal conversion terminal (3a) and GOOSE signal switchboard (3b), wherein one end of GOOSE signal conversion terminal is connected with data network card (1) by cable connection, and the other end is then passed GOOSE The optical fiber transmits the signal to the GOOSE signal switch, and the GOOSE signal switch transmits the signal to the message recording analysis and playback device (4), the digital measurement and control device (5) and the main transformer protection module (6) through the GOOSE optical fiber.