CN218601396U - Digital power amplifier of intelligent substation and traditional substation - Google Patents
Digital power amplifier of intelligent substation and traditional substation Download PDFInfo
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- CN218601396U CN218601396U CN202222906978.7U CN202222906978U CN218601396U CN 218601396 U CN218601396 U CN 218601396U CN 202222906978 U CN202222906978 U CN 202222906978U CN 218601396 U CN218601396 U CN 218601396U
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Abstract
The utility model discloses a digital power amplifier of intelligent substation and traditional transformer substation, including central processing unit, difference small signal input conversion unit, voltage source output unit, current source output unit, optical ethernet communication unit, simulation acquisition unit, communication unit. The utility model discloses can insert RTDS's differential signal to trun into the differential signal and can support traditional transformer substation voltage and electric current, and intelligent substation's the digital power amplifier of IEC61850 message.
Description
Technical Field
The utility model relates to a power amplifier technical field of electric power simulation system specifically is a digital power amplifier of intelligent substation and traditional transformer substation.
Background
With the continuous expansion of the scale of the power system and the rapid development of the electronic computer technology, the digital simulation technology has become one of the effective means for the engineering technicians to study the phenomena of the complex power system in the field of the power system; a real-time digital simulation system, whose english name is real time digital simulation system, abbreviated as RTDS; the RTDS is a product of the development of a digital simulation technology, a computer technology and a parallel processing technology, not only has the characteristic of digital simulation, but also more importantly, the real-time performance of the RTDS operation and the capability of closed-loop test are ensured by the adoption of the parallel processing technology and the design of special hardware, and the real-time simulation operation of a large-scale power system can be completed on the step length of 50 mu S.
The advent of real-time digital simulation systems (RTDS) is a product of the development of computer technology, parallel processing technology and digital simulation technology; the RTDS itself has many important features: firstly, the real-time performance of the RTDS is ensured by the adoption of a parallel processing technology and specially designed hardware, and the RTDS can run on a step length of 50 mu s level to simulate a large-scale power system in real time; secondly, the RTDS models and simulation algorithms used to simulate the components of the power system are based on the standard technologies that have been recognized for the current generation of widely used electromagnetic transient analysis software packages.
The RTDS is used in the research and development of novel relay protection products, and is used as a means for carrying out some special tests, so that a simulation environment for the actual operation of a relay protection device in a primary power system is provided, and the advancement of the relay protection products in the design and development and the reliability of the relay protection products in the field operation are ensured through the closed-loop test with the RTDS; generally, when testing relay protection products by using RTDS, digital power amplifiers, i.e. voltage amplifiers and current amplifiers are provided, and analog output signals of voltage and current quantities simulated by RTDS are amplified to replace secondary side outputs of PT and CT in an actual power system.
The performance of a digital power amplifier, which is a critical component of the RTDS that converts virtual simulation into physical quantity, directly affects the reliability of the operation of the simulation environment.
At present, the existing digital power amplifier only has analog voltage and analog current and can only support the traditional transformer substation, and if the existing digital power amplifier supports the intelligent transformer substation, a plurality of complex devices are required to be added, and the price is high; therefore, the existing digital power amplifier mainly has the following defects:
1. the existing digital power amplifier supports the traditional transformer substation and cannot simultaneously support the intelligent transformer substation;
2. the existing digital power amplifier cannot simultaneously output the traditional analog quantity and the digital quantity of the intelligent substation;
3. the existing digital power amplifier is not provided with an intelligent substation interface and a traditional substation interface at the same time.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides a digital power amplifier of intelligent substation and traditional transformer substation, the purpose is solved above-mentioned problem.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a digital power amplifier of an intelligent substation and a traditional substation comprises a central processing unit, a differential small signal input conversion unit, a voltage source output unit, a current source output unit, an Ethernet optical network communication unit, an analog acquisition unit and a communication unit;
the central processing unit is connected with the communication unit, the analog acquisition unit and the optical Ethernet communication unit, the differential small signal input conversion unit is connected with the voltage source output unit and the current source output unit, and the analog acquisition unit is connected with the differential small signal input conversion unit, the voltage source output unit and the current source output unit;
the central processing unit comprises a CPU and an FPGA module; the CPU processing module comprises an ADSPBF609 processor serving as a main control CPU for controlling the communication unit and the Ethernet-optical communication unit; XC7A50 is used as an FPGA module for connecting an analog acquisition unit;
the differential small signal input conversion unit comprises an AD8475 which is used for converting the differential small signals of the RTDS into single-ended signals;
the voltage source output unit comprises an OPA445, and converts a single-end signal into a current signal of 0- +/-60A;
the current source output unit comprises an OPA2277 and is used for converting a single-end signal into a voltage signal of 0 +/-300 volts;
the analog acquisition unit comprises an AD7616 which is used for sampling the voltage of the voltage source output unit, the current output by the current source output unit and the single-ended signal converted by the differential small signal input conversion unit, the data sampled by the analog acquisition unit is sent to the central processing unit, the central processing unit judges the input signal and the output analog quantity, and if the input signal and the output analog quantity are abnormal, the output is stopped;
the optical Ethernet communication unit FTLF1217P2xTL module is used for connecting an optical fiber interface of equipment of an intelligent substation;
the communication unit comprises an Ethernet communication module used for connecting an external computer with the Ethernet to configure the SCD file.
Preferably, the voltage source output unit is provided with a short-circuit protection interface.
Preferably, the current source output unit is provided with an open circuit protection interface and an overload protection interface.
Preferably, the central processing unit and the communication unit are connected through an MII bus.
Preferably, the connection between the central processing unit and the optical ethernet communication unit is an MII bus connection.
Preferably, the central processing unit and the analog acquisition unit are connected by an SPI bus.
Compared with the prior art, the utility model discloses possess following beneficial effect:
the utility model provides a digital power amplifier of intelligent transformer substation and traditional transformer substation, can realize the support to the device of RTDS to intelligent transformer substation and traditional transformer substation;
the intelligent substation SCD file configuration intelligent substation device IEC61850 can be automatically imported;
the real-time waveform of the RTDS can be observed on line by collecting the output of each analog quantity.
Drawings
FIG. 1 is a connection block diagram of the present invention;
fig. 2 is a connection relationship diagram of each unit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, a digital power amplifier for an intelligent substation and a conventional substation includes a central processing unit, a differential small signal input conversion unit, a voltage source output unit, a current source output unit, an ethernet communication unit, an analog acquisition unit, and a communication unit.
The central processing unit is connected with the communication unit, the analog acquisition unit and the optical Ethernet communication unit, the differential small signal input conversion unit is connected with the voltage source output unit and the current source output unit, and the analog acquisition unit is connected with the differential small signal input conversion unit, the voltage source output unit and the current source output unit.
The central processing unit comprises a CPU and an FPGA module; the CPU processing module comprises an ADSPBF609 processor serving as a main control CPU for controlling the communication unit and the Ethernet-optical communication unit; XC7A50 is used as an FPGA module for connecting an analog acquisition unit;
the differential small-signal input conversion unit includes an AD8475, and functions to convert the differential small signal of the RTDS into a single-ended signal.
The voltage source output unit comprises an OPA445, and converts the single-end signal into a current signal of 0- +/-60A;
the current source output unit comprises an OPA2277 and is used for converting the single-end signal into a voltage signal of 0 +/-300 volts;
the analog acquisition unit comprises an AD7616 which is used for sampling the voltage of the voltage source output unit, the current output by the current source output unit and the single-ended signal converted by the differential small signal input conversion unit, the data sampled by the analog acquisition unit is sent to the central processing unit, the central processing unit judges the input signal and the output analog quantity, and if the input signal and the output analog quantity are abnormal, the output is stopped;
the optical ethernet communication unit FTLF1217P2xTL module is used for connecting an optical fiber interface of equipment of an intelligent substation.
The communication unit comprises an Ethernet communication module used for connecting an external computer with the Ethernet to configure the SCD file.
The method comprises the following steps that a digital power amplifier is connected to RTDS differential signal input, voltage and current are connected to a device interface of a traditional transformer substation, optical fibers are connected to a device interface of an intelligent transformer substation, an SCD (substation configuration description) file is configured on an external computer, corresponding IED equipment is selected, the digital power amplifier collects RTDS differential signals, converts the RTDS differential signals into digital signals and outputs IEC61850 messages of the corresponding IED devices; the digital power amplifier collects the input signal and the output signal at the same time, and automatically stops when an abnormality is found.
In order to reduce the probability of short circuit of the voltage source output unit, the voltage source output unit is provided with a short circuit protection interface.
The current source output unit is provided with an open-circuit protection interface and an overload protection interface, so that the probability of overload and open-circuit conditions of the current source output unit can be reduced.
In order to increase the effectiveness of the connection, the central processing unit and the communication unit are connected through an MII bus; the central processing unit and the optical Ethernet communication unit are connected by an MII bus.
The central processing unit and the analog acquisition unit are connected by an SPI bus, and the data transmission rate block is more convenient for detection.
The utility model discloses RTDS's differential signal can be connected, truns into and can support traditional transformer substation voltage and electric current to and intelligent substation's IEC61850 message.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a digital power amplifier of intelligent substation and traditional transformer substation which characterized in that: the device comprises a central processing unit, a differential small signal input conversion unit, a voltage source output unit, a current source output unit, an optical Ethernet communication unit, an analog acquisition unit and a communication unit;
the central processing unit is connected with the communication unit, the analog acquisition unit and the Ethernet over Ethernet communication unit, the differential small signal input conversion unit is connected with the voltage source output unit and the current source output unit, and the analog acquisition unit is connected with the differential small signal input conversion unit, the voltage source output unit and the current source output unit;
the central processing unit comprises a CPU and an FPGA module; the CPU processing module comprises an ADSPBF609 processor serving as a main control CPU for controlling the communication unit and the Ethernet-optical communication unit; XC7A50 is used as an FPGA module for connecting an analog acquisition unit;
the differential small signal input conversion unit comprises an AD8475 which is used for converting the differential small signals of the RTDS into single-ended signals;
the voltage source output unit comprises an OPA445, and converts a single-end signal into a current signal of 0- +/-60A;
the current source output unit comprises an OPA2277 and is used for converting a single-end signal into a voltage signal of 0 +/-300 volts;
the analog acquisition unit comprises an AD7616 which is used for sampling the voltage of the voltage source output unit, the current output by the current source output unit and the single-ended signal converted by the differential small signal input conversion unit, the data sampled by the analog acquisition unit is sent to the central processing unit, the central processing unit judges the input signal and the output analog quantity, and if the input signal and the output analog quantity are abnormal, the output is stopped;
the optical Ethernet communication unit FTLF1217P2xTL module is used for connecting an optical fiber interface of equipment of an intelligent substation;
the communication unit comprises an Ethernet communication module used for connecting an external computer with the Ethernet to configure the SCD file.
2. The digital power amplifier of an intelligent substation and a traditional substation according to claim 1, characterized in that: the voltage source output unit is provided with a short-circuit protection interface.
3. The digital power amplifier of an intelligent substation and a traditional substation according to claim 1, characterized in that: the current source output unit is provided with an open circuit protection interface and an overload protection interface.
4. The digital power amplifier of an intelligent substation and a traditional substation according to claim 1, characterized in that: the central processing unit and the communication unit are connected through an MII bus.
5. The digital power amplifier of an intelligent substation and a traditional substation according to claim 1, characterized in that: the central processing unit and the optical Ethernet communication unit are connected by an MII bus.
6. The digital power amplifier of an intelligent substation and a traditional substation according to claim 1, characterized in that: and the central processing unit and the analog acquisition unit are connected by adopting an SPI bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222906978.7U CN218601396U (en) | 2022-10-31 | 2022-10-31 | Digital power amplifier of intelligent substation and traditional substation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222906978.7U CN218601396U (en) | 2022-10-31 | 2022-10-31 | Digital power amplifier of intelligent substation and traditional substation |
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| Publication Number | Publication Date |
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| CN218601396U true CN218601396U (en) | 2023-03-10 |
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| CN202222906978.7U Active CN218601396U (en) | 2022-10-31 | 2022-10-31 | Digital power amplifier of intelligent substation and traditional substation |
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2022
- 2022-10-31 CN CN202222906978.7U patent/CN218601396U/en active Active
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