CN116780469A - Relay protection device of energy storage system isolation transformer - Google Patents
Relay protection device of energy storage system isolation transformer Download PDFInfo
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- CN116780469A CN116780469A CN202310642039.2A CN202310642039A CN116780469A CN 116780469 A CN116780469 A CN 116780469A CN 202310642039 A CN202310642039 A CN 202310642039A CN 116780469 A CN116780469 A CN 116780469A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 29
- 238000002955 isolation Methods 0.000 title claims abstract description 27
- 230000006854 communication Effects 0.000 claims abstract description 43
- 238000004891 communication Methods 0.000 claims abstract description 40
- 230000003993 interaction Effects 0.000 claims abstract description 34
- 230000006870 function Effects 0.000 claims abstract description 30
- 241000272814 Anser sp. Species 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims description 25
- 238000004364 calculation method Methods 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/243—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for DC systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The disclosure relates to the technical field of isolation transformer relay protection, and provides an energy storage system isolation transformer relay protection device. The method comprises the following steps: the system comprises a power supply module, a man-machine interaction module, a communication interface module and a microprocessor module, wherein the power supply module is used for outputting 5V power supply and 24V power supply and outputting 5V voltage and 24V voltage to a corresponding 5V power supply line and 24V power supply line respectively; the man-machine interaction module is used for man-machine interaction; the communication interface module is used for receiving input GOOSE/SV message signals and inputting and outputting the GOOSE/SV message signals to the microprocessor module; the microprocessor module is used for realizing the functions of current quick-break protection, overcurrent protection, overvoltage protection, voltage loss protection, overload protection, breaker failure protection, temperature alarm protection and non-electric quantity protection, and guaranteeing the safe operation of the transformer. The embodiment of the disclosure can greatly increase the safety and stability of the energy storage system.
Description
Technical Field
The disclosure relates to the technical field of isolation transformer relay protection, in particular to an energy storage system isolation transformer relay protection device.
Background
In order to save energy and reduce consumption, the electrified railway traction power supply system improves the utilization rate of regenerative braking energy, realizes peak clipping and valley filling, and is provided with an energy storage system in a digital traction substation. The energy storage device is connected into the comprehensive automation system of the traction substation through an isolation transformer, the isolation transformer is key equipment for connecting the energy storage system with the traction power supply system, and the protection device provided with the isolation transformer is particularly important. In the prior art, a protection scheme aiming at the isolation transformer of the energy storage system of the traction substation is not provided, so that when the isolation transformer of the energy storage system of the traction substation fails, no protection measures are provided, and larger loss is easy to cause.
Disclosure of Invention
In view of the above, the embodiments of the present disclosure provide an energy storage system isolation transformer relay protection device, so as to solve the problem in the prior art that when the energy storage system isolation transformer of the traction substation fails, no protection measures are provided, and large losses are easily caused.
The embodiment of the disclosure provides a method for isolating a relay protection device of a transformer of an energy storage system, comprising the following steps:
the system comprises a power module, a man-machine interaction module, a communication interface module and a microprocessor module, wherein,
the power supply module is used for outputting 5V power supply and 24V power supply and outputting 5V voltage and 24V voltage to a corresponding 5V power supply circuit and 24V power supply circuit respectively;
one end of the man-machine interaction module is connected with the first end of the microprocessor module, the other end of the man-machine interaction module is connected with a 5V power supply line of the power supply module, the man-machine interaction module is used for man-machine interaction, sending information input manually to the microprocessor module, and receiving and displaying the information sent by the microprocessor module;
the first end of the communication interface module is connected with the second end of the microprocessor module, the second end of the communication interface module is connected with a 24V power supply circuit of the power supply module, and the third end of the communication interface module is used for receiving input GOOSE/SV message signals and inputting and outputting the GOOSE/SV message signals to the microprocessor module;
the third end of the microprocessor module is connected with a 5V power supply line of the power supply module, the microprocessor module is provided with a dual-core processor formed by ARM+DSP, and the dual-core processor is used for realizing the functions of current quick-break protection, overcurrent protection, overvoltage protection, voltage loss protection, overload protection, breaker failure protection, temperature alarm protection and non-electric quantity protection and guaranteeing the safe operation of the transformer.
In some embodiments, the microprocessor module is further provided with an FPGA, a first end of the FPGA is connected to the communication interface module, and the other end of the FPGA is connected to the dual-core processor, and the FPGA is configured to receive the GOOSE/SV packet signal sent by the communication interface module, and parse the GOOSE/SV packet signal into parsed data in a form of identifiable data of the dual-core processor; the dual-core processor realizes the functions of current quick-break protection, overcurrent protection, overvoltage protection, voltage loss protection, overload protection, breaker failure protection, temperature alarm protection and non-electric quantity protection according to the analysis data received from the FPGA, and ensures the safe operation of the transformer.
In some embodiments, the dual-core processor performs inter-core communication in a shared memory manner; wherein, the liquid crystal display device comprises a liquid crystal display device,
the ARM core is used for realizing the following functions:
the communication function with an external monitoring master station, a debugging tool and the man-machine interaction module is realized;
the functions of the DSP core for implementation include:
and responding to the detection of the remote control command, executing a protection algorithm and/or logic judgment, generating a protection algorithm and/or logic judgment result, and alarming or tripping based on the protection algorithm and/or logic judgment result.
In some embodiments, the functions for implementation by the DSP core further include:
the method comprises the steps of monitoring the real-time state of a switching value input signal and judging whether to execute control operation corresponding to the switching value input signal or not based on the real-time state.
In some embodiments, the functions for implementation by the DSP core further include:
and generating a corresponding switch control command according to the protection algorithm and/or the logic judgment result, and sending the switch control command to the FPGA so that the FPGA converts the received switch control command into a GOOSE/SV message signal and outputs the GOOSE/SV message signal.
In some embodiments, the functions for implementation by the DSP core further include:
and responding to the received execution instruction, generating corresponding execution information, and forwarding and uploading the execution information through the ARM core, wherein the execution information at least comprises one of triple remote information, constant value information, self-checking information and fault report.
In some embodiments, the human-computer interaction module is provided with keys, an LCD display screen and LED indicators, wherein,
an operator can perform man-machine interaction operation through the key core LCD display screen;
the LED indicator lamp is used for reflecting the working state of the device, wherein the LED indicator lamp comprises an operating lamp used for representing a normal operating state, a communication lamp representing a communication process, a warning lamp representing current alarm information, a tripping indicator lamp representing current tripping, and an overhaul lamp representing overhaul state.
In some embodiments, the communication interface module is provided with 1 to 5 SC/ST interfaces for input and output of GOOSE/SV message signals.
In some embodiments, the GOOSE/SV message received by the communication interface module provides 4 paths of current and 2 paths of voltage digital quantities, where the 4 paths of current are a-phase protection current, a-phase measurement current, b-phase protection current, and b-phase measurement current, and the 2 paths of voltage are a-phase voltage and b-phase voltage, respectively.
In some embodiments, the implementation steps of the current quick-break protection, overcurrent protection, overvoltage protection, voltage loss protection, overload protection, breaker failure protection, temperature alarm protection and non-electric quantity protection function include:
when the dual-core processor detects that any one of a-phase protection current, a-phase measurement current, b-phase protection current or b-phase measurement current is larger than a preset current tripping setting value and the duration time is larger than a preset first duration time, the dual-core processor outputs a current tripping protection instruction;
when the dual-core processor detects that any one of the a-phase protection current, the a-phase measurement current, the b-phase protection current or the b-phase measurement current is larger than a preset overcurrent setting value and the duration time is longer than a preset second duration time, the dual-core processor outputs an overcurrent protection alarm instruction;
when the dual-core processor detects that any one of a-phase voltage and b-phase voltage is larger than a preset overvoltage setting value, a circuit breaker corresponding to the any one of the voltages is in a closed state, and the duration time is longer than a preset third duration time, the dual-core processor outputs an overvoltage protection alarm instruction;
when the dual-core processor detects that any one of a-phase voltage and b-phase voltage is smaller than a preset voltage loss setting value, a circuit breaker corresponding to the any one voltage is in a closed state, and the duration time is longer than a preset fourth duration time, the dual-core processor outputs a voltage loss protection alarm instruction;
when the dual-core processor detects that the current bearing load is larger than a preset alarm load setting value, the dual-core processor outputs an overload alarm instruction;
when the dual-core processor detects that the current bearing load is larger than a preset tripping load setting value, the dual-core processor outputs an overload tripping instruction;
when the energy storage system isolation transformer relay protection device sends a tripping instruction, continuously outputting a breaker failure warning signal of a breaker corresponding to the tripping instruction and outputting the breaker number if the average current in a preset fifth time period is larger than a preset cut-off current threshold value, and continuing for a sixth time period;
the dual-core processor is also used for storing 4 paths of non-electric quantity tripping signal report records and 4 paths of non-electric quantity alarm report records corresponding to the a-phase protection current, the a-phase measurement current, the b-phase protection current or the b-phase measurement current.
In some embodiments, the overload protection includes a time-limited overload protection and an inverse time-limited overload protection, and when the calculated inverse time limit accords with protection, the calculation is performed according to the alarm load setting value/trip load setting value and a preset first calculation formula, where the first calculation formula includes:
wherein I is set Indicating the alarm load setting value/trip load setting value, T set The preset time constant is represented, I represents the current load current, and t represents the inverse time limit.
Advantageous effects
Compared with the prior art, the beneficial effects of the embodiment of the disclosure at least comprise: through setting up power module, man-machine interaction module, communication interface module and microprocessor module to realize that the electric current is quick disconnected protection, overcurrent protection, overvoltage protection, decompression protection, overload protection, circuit breaker malfunction protection, temperature warning protection, non-electric quantity protect function, can greatly increased energy storage system's security and stability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are required for the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic diagram of a simple structure of an energy storage system isolation transformer relay protection device provided according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a simple structure of a power module of an energy storage system isolation transformer relay protection device according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a man-machine interaction module of another energy storage system isolation transformer relay protection device according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a communication interface module of an energy storage system isolation transformer relay protection device according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a simple structure of a microprocessor module of an energy storage system isolation transformer relay protection device according to an embodiment of the present disclosure.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.
It should be further noted that, for convenience of description, only a portion relevant to the present disclosure is shown in the drawings. Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different systems, devices, modules, or units and are not intended to limit the order or interdependence of functions performed by such systems, devices, modules, or units.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.
The names of messages or information interacted between the various devices in the embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.
The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 1 is a simplified schematic diagram of an energy storage system isolation transformer relay protection device according to some embodiments of the present disclosure. Wherein, energy storage system isolation transformer overload protection device includes: the system comprises a power module, a man-machine interaction module, a communication interface module and a microprocessor module.
As shown in fig. 2, the power supply module is configured to output 5V power supply and 24V power supply, and output 5V voltage and 24V voltage to corresponding 5V power supply line and 24V power supply line, respectively. The power supply may refer to a power supply (ac or dc) obtained from the outside. As an example, the power supply may be a 220V/110V power supply.
In some embodiments, the power module is further provided with indicator lamps corresponding to the 5V power supply line and the 24V power supply line, respectively, for indicating whether the 5V power supply line and/or the 24V power supply line are normal. As an example, when the indicator lamp corresponding to the 5V power supply line is green, it may indicate that the 5V power supply line is normal. When the indicator lamp corresponding to the 24V power supply line is green, the 24V power supply line can be indicated to be normal.
As shown in fig. 1 and 3, one end of the man-machine interaction module is connected with the first end of the microprocessor module, the other end of the man-machine interaction module is connected with the 5V power supply line of the power supply module, and the man-machine interaction module is used for man-machine interaction, sending information input manually to the microprocessor module, and receiving and displaying the information sent by the microprocessor module.
In some embodiments, the human-computer interaction module is further provided with a display device. The display device is used for displaying content related to man-machine interaction.
Preferably, the display device may be a touch screen, and the operator may perform man-machine interaction through touch operation.
Preferably, the display device may be an LCD touch screen.
Preferably, the display device may be provided with keys. The man-machine interaction module can realize the man-machine interaction function through the combination of the keys and the display device.
In some embodiments, the man-machine interaction module is provided with an LED indicator light, which can be used for reflecting the working state of the device, wherein the LED indicator light comprises an operating light for indicating a normal operating state, a communication light for indicating that the communication process is in progress, a warning light for indicating that warning information is currently generated, a tripping indicator light for indicating that tripping is currently performed, and a maintenance light for indicating that the maintenance state is performed.
In some embodiments, as shown in fig. 1 and 4, the first end of the communication interface module is connected to the second end of the microprocessor module, the second end is connected to the 24V power supply line of the power supply module, and the third end is used for receiving the input GOOSE/SV message signal and inputting and outputting the GOOSE/SV message to the microprocessor module. The GOOSE/SV signals are common message signals in the art and are not described in detail herein.
In addition, the GOOSE/SV message received by the communication interface module provides 4 paths of current and 2 paths of voltage digital quantities, the 4 paths of current are a-phase protection current, a-phase measurement current, b-phase protection current and b-phase measurement current respectively, and the 2 paths of voltage are a-phase voltage and b-phase voltage respectively. The 4-way current and 2-way voltage are common settings and are not described in detail herein.
In some alternative implementations of some embodiments, the communication interface module is provided with 1 to 5 ethernet SC/ST interfaces (high speed duplex serial interfaces) for interacting data with the microprocessor module.
Preferably, the communication interface module is further provided with a debugging port, and the debugging port is used for debugging the communication interface module or the microprocessor module.
In some embodiments, referring to fig. 1 and 5, a third end of the microprocessor module is connected to a 5V power supply line of the power supply module, and the microprocessor module is provided with a dual-core processor formed by an arm+dsp, where the dual-core processor is used for implementing functions such as current quick-break protection, overcurrent protection, overvoltage protection, voltage loss protection, overload protection, breaker failure protection, temperature alarm protection, non-electric quantity protection, and the like, so as to ensure safe operation of the transformer.
In some embodiments, the microprocessor module is further provided with an FPGA, a first end of the FPGA is connected to the communication interface module, and the other end of the FPGA is connected to the dual-core processor, and the FPGA is configured to receive the GOOSE/SV packet signal sent by the communication interface module, and parse the GOOSE/SV packet signal into parsed data in a form of identifiable data of the dual-core processor; the dual-core processor realizes the protection functions of current quick-break protection, overcurrent protection, overvoltage protection, voltage loss protection, overload protection, breaker failure protection, temperature alarm protection, non-electric quantity and the like according to the analysis data received from the FPGA, and ensures the safe operation of the transformer.
In addition, the FPGA can also pre-process sampling point signals in GOOSE/SV message signals through a preset Fourier algorithm, so that the DSP operation pressure is reduced, and the performance of the micro-processing module is improved.
The DSP core can obtain a current and voltage sampling value from a signal transmitted by the FPGA, and then can complete protection and control functions (such as tripping) through protection algorithm and/or logic judgment. The FPGA receives GOOSE and/or SV signals forwarded by the communication interface module, pre-processes the data, analyzes the data into an internal data structure, and transmits the internal data structure to the ARM+DSP check data in the microprocessor module for further processing, so as to generate analog quantity and digital quantity required by protection.
The ARM core can be used for realizing the functions of a monitoring master station, a debugging tool, a communication function between the ARM core and the man-machine interaction module and the like; the monitoring master station and the debugging tool can refer to external related software. The DSP core may be configured to: and responding to the detection of the remote control command, executing a protection algorithm and/or logic judgment, generating a protection algorithm and/or logic judgment result, and alarming or tripping based on the protection algorithm and/or logic judgment result. The protection algorithm may refer to a scheduling algorithm which is built in the DSP core and is used for matching various protection operations of the energy storage system isolation transformer relay protection device in the embodiment. The logic judgment is similar to the protection algorithm, and can refer to the calculation related to the logic judgment which is built in the DSP core and is used for matching various protection operations of the energy storage system isolation transformer relay protection device in the embodiment. The protection algorithm and/or the logic judgment result may refer to a result obtained by calculation according to the protection algorithm and/or the logic judgment.
Preferably, the DSP core may be further configured to monitor a real-time state of a switching value input signal such as a switching position, an operation state of a primary device, and determine whether to execute a control operation corresponding to the switching value input signal based on the real-time state.
Preferably, the DSP core is also operable to: and generating corresponding switch opening and closing control commands according to the protection algorithm and/or the logic judgment result, and sending the corresponding switch opening and closing control commands to the FPGA so that the FPGA converts the received switch control commands into GOOSE/SV message signals and outputs the GOOSE/SV message signals.
Preferably, the DSP core is also operable to: and responding to the received execution instruction, generating corresponding execution information, and forwarding and uploading the execution information through the ARM core, wherein the execution information at least comprises one of triple remote information, constant value information, self-checking information and fault report. The three remote information, the fixed value information, the self-checking information and the fault report are common words in the field, and are not repeated here.
And inter-core communication is carried out between ARM and DSP cores in a shared memory mode. The ARM+DSP two cores share memory addresses and sizes. In addition, a shared memory area can be created, so that both cores can access the area, and the ARM core and the DSP core can read and write data by using the shared memory address, thereby realizing data exchange and sharing between the two cores.
When the data read-write operation between ARM+DSP cores is performed, a synchronous mechanism, namely a semaphore, a mutual exclusion lock, a read-write lock and the like, is adopted to control the access to the shared memory, so that the race condition between the two cores is avoided. It is ensured that the write operation of one core is completed and the other core can perform the read operation. And meanwhile, when writing operation is performed, a data checking mode is adopted to check whether the data is correctly written into the shared memory. When the data reading operation is carried out, a redundant backup mode is adopted to backup a plurality of data, so that even if a certain data has a problem, other backup data can still be used, and the correctness and the reliability of the data are ensured. Through the arrangement, high-precision digital signal reconstruction can be realized, the precision of the effective value of the analog quantity after digital processing is ensured, the measurement precision and the operation speed of the system are improved, and meanwhile, the operation load of the DSP is lightened. And a synchronization mechanism is adopted between the cores to control the access to the shared memory, so that the correctness and reliability of the data are ensured.
In some embodiments, the implementation steps of the current quick-break protection, overcurrent protection, overvoltage protection, voltage loss protection, overload protection, breaker failure protection, temperature alarm protection and non-electric quantity protection function include:
when the dual-core processor detects that any one of the a-phase protection current, the a-phase measurement current, the b-phase protection current or the b-phase measurement current is larger than a preset current tripping setting value and the duration time is larger than a preset first duration time, the dual-core processor outputs a current tripping protection instruction. The current trip setting value may refer to a preset limit value for limiting the current, preventing an excessive current from causing serious problems. The first duration may refer to a duration that the present current exceeds the current trip setting value. Beyond this current trip setting value, tripping needs to be performed.
When the dual-core processor detects that any one of the a-phase protection current, the a-phase measurement current, the b-phase protection current or the b-phase measurement current is larger than a preset overcurrent setting value and the duration time is larger than a preset second duration time, the dual-core processor outputs an overcurrent protection alarm instruction. The overcurrent setting value may refer to a preset limiting value for limiting the current to prevent the current from being excessively large, which may affect safety to some extent. The second time period may refer to a time period during which the present current exceeds the overcurrent setting value.
When the dual-core processor detects that any one of the a-phase voltage and the b-phase voltage is larger than a preset overvoltage setting value, a circuit breaker corresponding to the any one of the voltages is in a closed state, and the duration time is larger than a preset third duration time, the dual-core processor outputs an overvoltage protection alarm instruction. The overvoltage setting value may refer to a preset limiting value for limiting the voltage to prevent the voltage from being excessively large, which may affect the safety to some extent. The third duration may refer to a duration in which the current voltage exceeds the overvoltage setting value.
When the dual-core processor detects that any one of the a-phase voltage and the b-phase voltage is smaller than a preset voltage loss setting value, the circuit breaker corresponding to the any one voltage is in a closed state, and the duration time is longer than a preset fourth duration time, the dual-core processor outputs a voltage loss protection alarm instruction. The voltage loss setting value may be a preset limiting value for limiting the voltage to prevent the voltage from being too small, which may affect the safety to some extent. The fourth duration may refer to a duration in which the current voltage is less than the voltage loss setting value.
And when the dual-core processor detects that the current bearing load is larger than a preset alarm load setting value, the dual-core processor outputs an overload alarm instruction. The alarm load setting value may refer to a preset limiting value for limiting the current load to prevent from conforming too much, which may affect safety to some extent.
And when the dual-core processor detects that the current bearing load is larger than a preset tripping load setting value, the dual-core processor outputs an overload tripping instruction. The trip load setting value may refer to a preset limit value for limiting the current load from being excessively met, which may seriously affect safety. Exceeding the trip load setting value requires tripping to be performed.
When the energy storage system isolation transformer relay protection device sends a tripping command, if the average current in a preset fifth time period is larger than a preset cut-off current threshold value, continuously outputting a breaker failure warning signal of a breaker corresponding to the tripping command, and outputting the breaker number for a sixth time period. The fifth duration may refer to a duration that the present current is greater than a preset cutoff current threshold (e.g., the cutoff current threshold may be 0.05 In) after the energy storage system isolation transformer relay protection device issues a trip command. When the situation occurs, the circuit breaker does not successfully trip, the number of the circuit breaker corresponding to the tripping instruction is required to be sent out, and an alarm signal, namely a circuit breaker failure alarm signal, is continuously sent out. The breaker failure warning signal may last for a certain period of time, i.e. a sixth period of time. As an example, the sixth duration may be 2 seconds.
The dual-core processor is also used for storing 4 paths of non-electric quantity tripping signal report records and 4 paths of non-electric quantity alarm report records corresponding to the a-phase protection current, the a-phase measurement current, the b-phase protection current or the b-phase measurement current.
In some embodiments, the overload protection includes a time-limited overload protection and an inverse time-limited overload protection, and when the calculated inverse time limit accords with protection, the calculation is performed according to the alarm load setting value/trip load setting value and a preset first calculation formula, where the first calculation formula includes:
wherein I is set Indicating the alarm load setting value/trip load setting value, T set Representing a preset time constant, I representing the present load current, t representing the inverse time limit, the first calculation formula may refer to a calculation formula for calculating the inverse time limit.
In some embodiments, referring to fig. 5, the microprocessor module is further provided with two ethernet ports (port a and port B in fig. 5), 10M/100M self-adaptation, and supports star-shaped, ring-shaped, and other network topologies. The network cable interface may support an electrical interface connection and/or a fiber optic connection. In addition, the Ethernet port can support communication protocols such as IEC60870-5-103, IEC61850 and the like.
The beneficial effects of one of the above embodiments of the present disclosure include at least: through setting up power module, man-machine interaction module, communication interface module and microprocessor module to realize that the electric current is quick disconnected protection, overcurrent protection, overvoltage protection, decompression protection, overload protection, circuit breaker malfunction protection, temperature warning protection, non-electric quantity protect function, can greatly increased energy storage system's security and stability.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the invention in the embodiments of the present disclosure is not limited to the specific combination of the above technical features, but encompasses other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the invention. Such as the above-described features, are mutually substituted with (but not limited to) the features having similar functions disclosed in the embodiments of the present disclosure.
Claims (11)
1. An energy storage system isolation transformer relay protection device, which is characterized by comprising:
the system comprises a power module, a man-machine interaction module, a communication interface module and a microprocessor module, wherein,
the power supply module is used for outputting 5V power supply and 24V power supply and outputting 5V voltage and 24V voltage to a corresponding 5V power supply circuit and 24V power supply circuit respectively;
one end of the man-machine interaction module is connected with the first end of the microprocessor module, the other end of the man-machine interaction module is connected with a 5V power supply line of the power supply module, the man-machine interaction module is used for man-machine interaction, sending information input manually to the microprocessor module, and receiving and displaying the information sent by the microprocessor module;
the first end of the communication interface module is connected with the second end of the microprocessor module, the second end of the communication interface module is connected with a 24V power supply circuit of the power supply module, and the third end of the communication interface module is used for receiving input GOOSE/SV message signals and inputting and outputting the GOOSE/SV message signals to the microprocessor module;
the third end of the microprocessor module is connected with a 5V power supply line of the power supply module, the microprocessor module is provided with a dual-core processor formed by ARM+DSP, and the dual-core processor is used for realizing the functions of current quick-break protection, overcurrent protection, overvoltage protection, voltage loss protection, overload protection, breaker failure protection, temperature alarm protection and non-electric quantity protection and guaranteeing the safe operation of the transformer.
2. The apparatus of claim 1, wherein the microprocessor module is further provided with an FPGA, a first end of the FPGA is connected to the communication interface module, and the other end of the FPGA is connected to the dual-core processor, and the FPGA is configured to receive GOOSE/SV message signals sent by the communication interface module, and parse the GOOSE/SV message signals into parsed data in a form of identifiable data by the dual-core processor; the dual-core processor realizes the functions of current quick-break protection, overcurrent protection, overvoltage protection, voltage loss protection, overload protection, breaker failure protection, temperature alarm protection and non-electric quantity protection according to the analysis data received from the FPGA, and ensures the safe operation of the transformer.
3. The apparatus of claim 2, wherein the dual-core processor performs inter-core communication in a shared memory manner; wherein, the liquid crystal display device comprises a liquid crystal display device,
the ARM core is used for realizing the following functions:
the communication function with an external monitoring master station, a debugging tool and the man-machine interaction module is realized;
the functions of the DSP core for implementation include:
and responding to the detection of the remote control command, executing a protection algorithm and/or logic judgment, generating a protection algorithm and/or logic judgment result, and alarming or tripping based on the protection algorithm and/or logic judgment result.
4. The apparatus of claim 3, wherein the DSP core for implementing functions further comprises:
the method comprises the steps of monitoring the real-time state of a switching value input signal and judging whether to execute control operation corresponding to the switching value input signal or not based on the real-time state.
5. The apparatus of claim 3, wherein the DSP core for implementing functions further comprises:
and generating a corresponding switch control command according to the protection algorithm and/or the logic judgment result, and sending the switch control command to the FPGA so that the FPGA converts the received switch control command into a GOOSE/SV message signal and outputs the GOOSE/SV message signal.
6. The apparatus of claim 3, wherein the DSP core for implementing functions further comprises:
and responding to the received execution instruction, generating corresponding execution information, and forwarding and uploading the execution information through the ARM core, wherein the execution information at least comprises one of triple remote information, constant value information, self-checking information and fault report.
7. The device according to any one of claims 1 to 6, wherein the human-machine interaction module is provided with keys, an LCD display and LED indicators, wherein,
an operator can perform man-machine interaction operation through the key core LCD display screen;
the LED indicator lamp is used for reflecting the working state of the device, wherein the LED indicator lamp comprises an operating lamp used for representing a normal operating state, a communication lamp representing a communication process, a warning lamp representing current alarm information, a tripping indicator lamp representing current tripping, and an overhaul lamp representing overhaul state.
8. The apparatus according to any one of claims 1 to 6, wherein the communication interface module is provided with 1 to 5 SC/ST interfaces for input and output of GOOSE/SV message signals.
9. The apparatus of any of claims 1 to 6, wherein GOOSE/SV messages received by the communication interface module provide 4-way current and 2-way voltage digital quantities, the 4-way current being a-phase protection current, a-phase measurement current, b-phase protection current, and b-phase measurement current, respectively, and the 2-way voltage being a-phase voltage and b-phase voltage, respectively.
10. The apparatus of claim 9, wherein the implementing steps of the current quick break protection, the over-current protection, the over-voltage protection, the voltage loss protection, the overload protection, the breaker failure protection, the temperature alarm protection, the non-electric quantity protection function include:
when the dual-core processor detects that any one of a-phase protection current, a-phase measurement current, b-phase protection current or b-phase measurement current is larger than a preset current tripping setting value and the duration time is larger than a preset first duration time, the dual-core processor outputs a current tripping protection instruction;
when the dual-core processor detects that any one of the a-phase protection current, the a-phase measurement current, the b-phase protection current or the b-phase measurement current is larger than a preset overcurrent setting value and the duration time is longer than a preset second duration time, the dual-core processor outputs an overcurrent protection alarm instruction;
when the dual-core processor detects that any one of a-phase voltage and b-phase voltage is larger than a preset overvoltage setting value, a circuit breaker corresponding to the any one of the voltages is in a closed state, and the duration time is longer than a preset third duration time, the dual-core processor outputs an overvoltage protection alarm instruction;
when the dual-core processor detects that any one of a-phase voltage and b-phase voltage is smaller than a preset voltage loss setting value, a circuit breaker corresponding to the any one voltage is in a closed state, and the duration time is longer than a preset fourth duration time, the dual-core processor outputs a voltage loss protection alarm instruction;
when the dual-core processor detects that the current bearing load is larger than a preset alarm load setting value, the dual-core processor outputs an overload alarm instruction;
when the dual-core processor detects that the current bearing load is larger than a preset tripping load setting value, the dual-core processor outputs an overload tripping instruction;
when the energy storage system isolation transformer relay protection device sends a tripping instruction, continuously outputting a breaker failure warning signal of a breaker corresponding to the tripping instruction and outputting the breaker number if the average current in a preset fifth time period is larger than a preset cut-off current threshold value, and continuing for a sixth time period;
the dual-core processor is also used for storing 4 paths of non-electric quantity tripping signal report records and 4 paths of non-electric quantity alarm report records corresponding to the a-phase protection current, the a-phase measurement current, the b-phase protection current or the b-phase measurement current.
11. The apparatus of claim 10, wherein the overload protection comprises a time-limited overload protection and an inverse time-limited overload protection, wherein the calculating the inverse time-limited compliance protection is based on the alarm load setting value/trip load setting value and a predetermined first calculation formula, wherein the first calculation formula comprises:
wherein I is set Indicating the alarm load setting value/trip load setting value, T set The preset time constant is represented, I represents the current load current, and t represents the inverse time limit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117761584A (en) * | 2024-02-22 | 2024-03-26 | 保定华创电气有限公司 | Fault detection method and device for power transformer, electronic equipment and medium |
| CN117761584B (en) * | 2024-02-22 | 2024-05-17 | 保定华创电气有限公司 | Fault detection method and device for power transformer, electronic equipment and medium |
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2023
- 2023-05-31 CN CN202310642039.2A patent/CN116780469A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117761584A (en) * | 2024-02-22 | 2024-03-26 | 保定华创电气有限公司 | Fault detection method and device for power transformer, electronic equipment and medium |
| CN117761584B (en) * | 2024-02-22 | 2024-05-17 | 保定华创电气有限公司 | Fault detection method and device for power transformer, electronic equipment and medium |
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