CN107219772B - Method, device and system for testing function indexes of multi-loop fault suppression and isolation device - Google Patents
Method, device and system for testing function indexes of multi-loop fault suppression and isolation device Download PDFInfo
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Abstract
The invention relates to a method for testing the function index of a multi-circuit fault suppression and isolation device, which comprises the following steps: initializing a power distribution network networking model in a real-time digital simulator according to actual operation information of the multi-loop power distribution network; obtaining a current fault condition according to the fault occurrence model; controlling a real-time digital simulator to perform power distribution network simulation under the current fault condition to obtain a first current-voltage analog signal of the power distribution network; acquiring a digital control signal, a line selection result and a capacitance current measurement value which are output by the multi-loop fault suppression and isolation device according to the first current-voltage analog signal; adjusting a power distribution network networking model, and controlling the real-time digital simulator to perform power distribution network simulation again to obtain a second current-voltage analog signal of the power distribution network; and determining the function index of the device according to the fault condition, the line selection result, the measured value of the capacitance current and the first and second current-voltage analog signals. The invention can comprehensively test the function indexes of the multi-circuit fault suppression and isolation device and has low test cost.
Description
Technical Field
The invention relates to the field of power system simulation, in particular to a method, a device, a system, a storage medium and computer equipment for testing a function index of a multi-loop fault suppression and isolation device.
Background
In an electric power system, a multi-loop fault suppression and isolation device is used for judging fault properties and fault lines in an arc suppression coil grounding power distribution network, and a complete set of device can be matched with an arc suppression coil of a transformer substation and has the capacity of measuring overvoltage and overcurrent when arc grounding. When the multi-loop fault suppression and isolation device is selected, the fault suppression and isolation functions of the multi-loop fault suppression and isolation device need to be examined in multiple aspects. The traditional mode adopts a field test mode to perform device examination, however, the examination mode needs to perform wiring modification on a transformer substation, a proper test environment is built, the realization cost is high, and the examination period is long.
Disclosure of Invention
Based on this, the embodiments of the present invention provide a method, an apparatus, a system, a storage medium, and a computer device for testing a function index of a multi-loop fault suppression and isolation apparatus, which can comprehensively test the function index of the multi-loop fault suppression and isolation apparatus, and have a low test cost.
One aspect of the present invention provides a method for testing a function index of a multiple-circuit fault suppression and isolation apparatus, comprising:
initializing a power distribution network networking model pre-established in a real-time digital simulator according to actual operation information of the multi-loop power distribution network with the arc suppression coil grounded;
obtaining a current fault condition according to a fault occurrence model corresponding to the power distribution network networking model in the real-time digital simulator;
controlling a real-time digital simulator to simulate the multi-loop power distribution network under the current fault condition based on the current power distribution network networking model to obtain a first current-voltage analog signal of the multi-loop power distribution network; transmitting the first current-voltage analog signal to a multi-loop fault suppression and isolation device to be tested;
acquiring a digital control signal, a grounding line selection result and a capacitance current measurement value which are output by the multi-loop line fault suppression and isolation device according to the first current-voltage analog signal;
adjusting the power distribution network networking model according to the digital control signal, and controlling a real-time digital simulator to perform multi-loop power distribution network simulation again based on the adjusted power distribution network networking model to obtain a second current-voltage analog signal of the multi-loop power distribution network;
and determining the functional index of the multi-loop fault suppression and isolation device according to the fault condition, the grounding line selection result, the capacitance current measurement value, the first current-voltage analog signal and the second current-voltage analog signal.
A device for testing the function index of a multi-loop fault suppression and isolation device comprises:
the initialization module is used for initializing a power distribution network networking model which is pre-established in the real-time digital simulator according to the actual operation information of the multi-loop power distribution network with the grounded arc suppression coil;
the fault condition generation module is used for obtaining the current fault condition according to a fault occurrence model corresponding to the power distribution network networking model in the real-time digital simulator;
the primary simulation module is used for controlling the real-time digital simulator to simulate the multi-loop power distribution network under the current fault condition based on the current power distribution network networking model so as to obtain a first current-voltage analog signal of the multi-loop power distribution network;
the device information acquisition module is used for transmitting the first current-voltage analog signal to a multi-loop fault suppression and isolation device to be tested; acquiring a digital control signal, a grounding line selection result and a capacitance current measurement value which are output by the multi-loop line fault suppression and isolation device according to the first current-voltage analog signal;
the secondary simulation module is used for adjusting the power distribution network networking model according to the digital control signal, and controlling the real-time digital simulator to perform multi-loop power distribution network simulation again based on the adjusted power distribution network networking model to obtain a second current-voltage simulation signal of the multi-loop power distribution network;
and the index determining module is used for determining the functional index of the multi-circuit line fault suppression and isolation device according to the fault condition, the grounding line selection result, the capacitance current measurement value, the first current-voltage analog signal and the second current-voltage analog signal.
A system for testing the function index of a multi-loop fault suppression and isolation device comprises: the system comprises a real-time digital simulator, a signal screen cabinet and a multi-loop fault suppression and isolation device to be tested; a power distribution network networking model and a corresponding fault occurrence model are established in the real-time digital simulator; a current transformer and a voltage transformer are arranged in the signal screen cabinet;
the analog signal output interface of the real-time digital simulator is connected with the input interface of the signal screen cabinet, and the output interface of the signal screen cabinet is connected with the analog signal input interface of the multi-loop fault suppression and isolation device to be tested; the digital signal input interface of the real-time digital simulator is connected with the digital signal output interface of the multi-circuit fault suppression and isolation device;
the real-time digital simulator outputs a first current-voltage analog signal of the multi-loop power distribution network under the current fault condition, which is obtained based on the power distribution network networking model and the fault occurrence model in a simulation mode, to a signal screen cabinet; amplifying the first current-voltage analog signal through a current transformer and a voltage transformer in a signal screen cabinet, and outputting the amplified analog signal to the multi-circuit fault suppression and isolation device; the multi-circuit fault suppression and isolation device outputs a corresponding digital control signal to the real-time digital simulator; the multi-circuit fault suppression and isolation device also outputs a grounding line selection result and a capacitance current measurement value under the current fault condition;
the real-time digital simulator adjusts a power distribution network networking model according to the digital control signal output by the multi-circuit fault suppression and isolation device, and performs multi-circuit power distribution network simulation again based on the adjusted power distribution network networking model to obtain a second current-voltage analog signal of the multi-circuit power distribution network;
and determining the functional index of the multi-loop fault suppression and isolation device according to the simulated fault condition in the real-time digital simulator, the grounding line selection result and the capacitance current measurement value output by the multi-loop fault suppression and isolation device, and the first current-voltage analog signal and the second current-voltage analog signal obtained by the simulation of the real-time digital simulator.
A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method as described above.
A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method described above when executing the program.
According to the technical scheme, various working conditions of a multi-circuit power distribution network production field can be simulated based on the real-time digital simulator, so that related function indexes of multi-circuit fault suppression and isolation devices can be comprehensively and effectively detected, actual wiring modification of a transformer substation is not needed, an experimental field can be reduced, and the test cost is saved.
Drawings
FIG. 1 is a schematic flow chart of a method for testing a functional indicator of a multi-loop fault suppression and isolation apparatus according to an embodiment;
FIG. 2 is a schematic diagram of a power distribution network networking model according to an embodiment;
FIG. 3 is a schematic diagram of a fault occurrence model of an embodiment;
FIG. 4 is a diagram of an application environment of a method for testing a function index of a multi-loop fault suppression and isolation apparatus according to an embodiment;
fig. 5 is a flowchart of a method for testing a function index of a multi-loop fault suppression and isolation apparatus in the application scenario of fig. 4;
fig. 6 is a schematic structural diagram of an apparatus for testing a function index of a multi-loop fault suppression and isolation apparatus according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
FIG. 1 is a schematic flow chart of a method for testing a functional indicator of a multi-loop fault suppression and isolation apparatus according to an embodiment; as shown in fig. 1, the method for testing the function index of the multi-loop fault suppression and isolation apparatus in this embodiment includes the steps of:
and S11, initializing a distribution network networking model pre-established in the real-time digital simulator according to the actual operation information of the multi-loop distribution network with the arc suppression coil grounded.
The power distribution network networking model can reflect networking information of the multi-loop power distribution network with the arc suppression coil grounded, and the networking information comprises networking structure information, element state and/or parameter information and the like.
And S12, obtaining the current fault condition according to the fault occurrence model corresponding to the power distribution network networking model in the real-time digital simulator.
In an optional embodiment, the method further includes the steps of establishing a power distribution network networking model in a real-time digital simulator in advance, and establishing a fault occurrence model corresponding to the power distribution network networking model. The fault occurrence model is associated with the power distribution network networking model, and the power distribution network networking model can be adjusted by setting the model parameters of the fault occurrence model, so that the effect of the corresponding working condition of the multi-loop power distribution network can be simulated.
Preferably, the fault condition comprises: fault location, time of occurrence of the fault, number of faulty lines, transition resistance, initial angle of ground, and/or intermittent time, etc. Through the pre-established distribution network networking model and fault occurrence model in the real-time digital simulator, various different fault conditions can be simulated, and further the functional indexes of the multi-circuit line fault suppression and isolation device under different fault conditions can be tested.
And S13, controlling the real-time digital simulator to perform multi-loop power distribution network simulation under the current fault condition based on the current power distribution network networking model, and obtaining a first current-voltage analog signal of the multi-loop power distribution network.
The real-Time Digital simulator RTDS (real Time Digital simulator) can realize real-Time output based on a Digital processor and parallel calculation, and simultaneously adopts a kilomega processor card to greatly reduce the simulation step length to 20 microseconds, and the response can be accurate to 9 kHz. The RTDS is based on a power distribution network networking model, can perform comprehensive, accurate, real-time and dynamic simulation on a power grid in a laboratory environment, and truly reflects the running state of an actual power system.
S14, transmitting the first current-voltage analog signal to a multi-loop fault suppression and isolation device to be tested; and acquiring a digital control signal, a grounding line selection result and a capacitance current measurement value which are output by the multi-loop fault suppression and isolation device according to the first current-voltage analog signal.
And S15, adjusting the power distribution network networking model according to the digital control signal, and controlling the real-time digital simulator to perform multi-loop power distribution network simulation again based on the adjusted power distribution network networking model to obtain a second current-voltage analog signal of the multi-loop power distribution network.
And S16, determining the function index of the multi-loop fault suppression and isolation device according to the fault condition, the grounding and line selection result, the capacitance current measurement value, the first current-voltage analog signal and the second current-voltage analog signal.
The RTDS can not only be connected with an actual multi-loop fault suppression and isolation device to form a flexible and convenient closed loop, but also can perform analog simulation on various complex and severe working conditions which are difficult to realize or inadmissible in an actual power system. Therefore, the RTDS is connected with the multi-circuit fault suppression and isolation device for simulation test, the defects of the traditional field test can be effectively overcome, various working conditions which may appear on the field can be simulated, and the cost can be saved.
In an optional embodiment, the power distribution network networking model may include: the system comprises a large power grid model, a transformer model, a grounding transformer model, a phase-control arc suppression coil model, a cable model and/or a load model and the like. Preferably, referring to fig. 2, the large power grid uses a three-phase alternating-current voltage source, the transformer model uses a three-phase double-winding transformer model, the grounding transformer model uses a Zigzag model, the control arc suppression coil model uses a small step size model, and the cable model uses a PI type line model.
In an optional embodiment, referring to fig. 3, in the real-time digital simulator, a corresponding electrical data extraction model, an electrical data processing model and/or a result display model may also be pre-established, the electrical data extraction model is configured to obtain a current fault occurrence parameter from the fault occurrence model, the electrical data processing model is configured to perform corresponding processing on the extracted fault occurrence parameter to obtain a current fault condition, and the result display model is configured to output and display the current fault condition. In addition, the result display model is also used for outputting and displaying the simulation result of the real-time digital simulation multi-loop power distribution network, for example, the first current-voltage analog signal and the second current-voltage analog signal are output and displayed. Preferably, the fault occurrence model adopts single-phase earth fault, the occurrence time of the fault adopts external control, and the fault can be generated or removed in real time during the test. The electrical data extraction and processing includes an intermittent ground fault setting model and a fixed ground initial angle setting model.
In an optional embodiment, the step S16 specifically includes:
determining a grounding line selection function index of the multi-loop line fault suppression and isolation device according to a fault condition and a grounding line selection result output by the loop line fault suppression and isolation device under the fault condition;
determining a capacitance current measurement function index of the multi-loop fault suppression and isolation device according to a fault condition and a capacitance current measurement value output by a loop fault suppression and isolation device under the fault condition;
and determining an arc overvoltage suppression function, a ground residual current suppression function and/or a ground start response speed of the multi-loop fault suppression and isolation device according to the first current-voltage analog signal and the second current-voltage analog signal.
By the method of the embodiment, the related functional test of multi-loop fault suppression and isolation can be realized at least comprising the following steps: the method comprises the following steps of capacitance current measurement function testing, grounding compensation starting speed testing, grounding residual current limiting capability testing, arc light overvoltage suppression capability testing and grounding line selection function testing.
Fig. 4 is a specific application scenario diagram of the method for testing a function index of a multiple-circuit line fault suppression and isolation device according to an embodiment of the present invention, and as shown in fig. 4, the application scenario is as follows: the RTDS and the multi-loop fault suppression and isolation device to be tested are connected through the signal screen cabinet to form a closed-loop test platform, and the test platform can realize related function tests of multi-loop fault suppression and isolation under different fault conditions. A primary system (namely a power distribution network networking model) and a secondary system (comprising a fault occurrence model, an electrical data extraction model and an electrical data processing model) of a multi-loop power distribution network test model with an arc suppression coil grounded are established in the RTDS, and real-time simulation and test operation of the multi-loop power distribution network can be executed. The fault generation model adopts single-phase earth fault, external control is adopted at the fault generation time, and the fault can be generated or removed in real time during testing. The electrical data extraction and processing includes an intermittent ground fault setting model and a fixed ground initial angle setting model. Through primary system and secondary system can simulate the multiple operating mode of many return wires distribution network, include: connecting a corresponding line in the power distribution network networking model with the fault occurrence model to simulate a corresponding fault position; simulating the corresponding fault occurrence time by adjusting the fault time parameter of the fault occurrence model; connecting a plurality of lines in a power distribution network networking model with a fault generation submodule to simulate the number of corresponding fault lines; simulating a corresponding transition resistance by adjusting the transition resistance parameter in the fault occurrence model; simulating a corresponding ground initial angle by adjusting a fixed ground initial angle in a fault generation model; and simulating the corresponding intermittent time of the fault by adjusting the time parameter of the intermittent earth fault in the fault occurrence model. Namely: the fault position is realized by connecting different lines with a fault generation module; the fault time can be randomly set in the fault occurrence model, and any one or more faults can be caused to occur at any time; the number of fault lines can be realized by connecting a plurality of loops with the fault generation module; the transition resistance is realized by changing the transition resistance parameter in the fault occurrence model; the grounding initial angle is set through a fixed grounding initial angle setting model, and the intermittent time is set through intermittent grounding faults.
The signal screen cabinet comprises a current transformer and a voltage transformer inside. The analog signal output interface of the real-time digital simulator is connected with the input interface of the signal screen cabinet, and the output interface of the signal screen cabinet is connected with the analog signal input interface of the multi-loop fault suppression and isolation device to be tested; and a digital signal input interface of the real-time digital simulator is connected with a digital signal output interface of the multi-circuit fault suppression and isolation device.
The test platform can realize function tests under different fault conditions, and specifically comprises tests of different fault positions, different fault moments, different fault line numbers, different transition resistances, different grounding initial angles and different intermittent time. Correspondingly, based on the above test platform, the related function test of multi-loop fault suppression and isolation can be performed, including: the method comprises the following steps of capacitance current measurement function testing, grounding compensation starting speed testing, grounding residual current limiting capability testing, arc light overvoltage suppression capability testing and grounding line selection function testing. The method for testing the function index of the multi-loop fault suppression and isolation device according to the above embodiment is further explained with reference to fig. 4 and 5.
As shown in fig. 5, the method for testing the function index of the multi-loop fault suppression and isolation apparatus in this embodiment includes the steps of:
(1) setting primary system parameters according to actual operation information of the multi-loop power distribution network with the arc suppression coil grounded; namely, a pre-established power distribution network networking model in the real-time digital simulator is initialized.
(2) And setting a secondary system in the real-time digital simulator according to actual test requirements to form different fault conditions.
(3) The RTDS carries out real-time digital simulation according to the setting conditions of the primary system and the secondary system, and outputs a simulation result of the multi-loop power distribution network under the current fault condition, namely a first current-voltage simulation signal; after being amplified by a current-voltage transformer in the signal screen cabinet, the amplified signals are transmitted to a multi-loop fault suppression and isolation device to be tested.
(4) The multi-loop fault suppression and isolation device sends out a corresponding digital control signal through operation processing according to a current-voltage analog signal (namely, an analog signal obtained after amplification of a first current-voltage analog signal) transmitted by the signal screen cabinet, and simultaneously outputs a line selection result and a capacitance current measurement value.
The digital control signal is transmitted into the RTDS, the distribution network networking model in the RTDS is adjusted according to the digital control signal, and specifically, for example, the operation mode of an arc suppression coil in the distribution network networking model is adjusted according to the digital control signal.
(5) And the RTDS carries out real-time simulation to obtain a second current-voltage analog signal of the multi-loop power distribution network. The secondary system extracts and records voltage and current values before and after fault processing (namely a first current and voltage analog signal before fault processing, and a second current and voltage analog signal after fault processing). According to the fault condition, the grounding line selection result, the capacitance current measurement value, the first current-voltage analog signal and the second current-voltage analog signal, the related function indexes of the multi-circuit line fault suppression and isolation device are output through a result display model after processing, and the method comprises the following steps: the grounding line selection accuracy, the capacitance current measurement accuracy, the arc overvoltage suppression level, the grounding start response speed, the grounding residual current suppression level and the like.
It should be noted that, for the sake of simplicity, the foregoing method embodiments are described as a series of acts or combinations, but those skilled in the art should understand that the present invention is not limited by the described order of acts, as some steps may be performed in other orders or simultaneously according to the present invention.
Based on the same idea as the method for testing the function index of the multi-loop fault suppression and isolation device in the above embodiment, the present invention further provides a system for testing the function index of the multi-loop fault suppression and isolation device, including: the system comprises a real-time digital simulator, a signal screen cabinet and a multi-loop fault suppression and isolation device to be tested; a power distribution network networking model and a corresponding fault occurrence model are established in the real-time digital simulator; and a current transformer and a voltage transformer are arranged in the signal screen cabinet.
The analog signal output interface of the real-time digital simulator is connected with the input interface of the signal screen cabinet, and the output interface of the signal screen cabinet is connected with the analog signal input interface of the multi-loop fault suppression and isolation device to be tested; and a digital signal input interface of the real-time digital simulator is connected with a digital signal output interface of the multi-circuit fault suppression and isolation device.
And the real-time digital simulator outputs a first current-voltage analog signal of the multi-loop power distribution network to the signal screen cabinet under the current fault condition, wherein the first current-voltage analog signal is obtained based on the power distribution network networking model and the fault occurrence model. And amplifying the first current-voltage analog signal through a current transformer and a voltage transformer in the signal screen cabinet, and outputting the amplified analog signal to the multi-circuit fault suppression and isolation device.
The multi-circuit fault suppression and isolation device outputs a corresponding digital control signal to the real-time digital simulator; and the multi-loop fault suppression and isolation device also outputs a grounding line selection result and a capacitance current measurement value under the current fault condition.
And the real-time digital simulator adjusts a power distribution network networking model according to the digital control signal output by the multi-circuit fault suppression and isolation device, and performs multi-circuit power distribution network simulation again based on the adjusted power distribution network networking model to obtain a second current-voltage analog signal of the multi-circuit power distribution network.
And determining the functional index of the multi-loop fault suppression and isolation device according to the simulated fault condition in the real-time digital simulator, the grounding line selection result and the capacitance current measurement value output by the multi-loop fault suppression and isolation device, and the first current-voltage analog signal and the second current-voltage analog signal obtained by the simulation of the real-time digital simulator. Therefore, the function indexes of the multi-circuit fault suppression and isolation device can be comprehensively tested, and the device is low in cost and high in efficiency.
Based on the same idea as the method for testing the function index of the multi-loop fault suppression and isolation device in the embodiment, the invention further provides a device for testing the function index of the multi-loop fault suppression and isolation device, and the system can be used for executing the method for testing the function index of the multi-loop fault suppression and isolation device. For convenience of illustration, the structural schematic diagram of the embodiment of the device for testing the function index of the multi-loop fault suppression and isolation device only shows a part related to the embodiment of the present invention, and those skilled in the art will understand that the illustrated structure does not constitute a limitation to the system, and may include more or less components than those illustrated, or combine some components, or arrange different components.
Fig. 6 is a schematic structural diagram of an apparatus for testing a function index of a multi-loop fault suppression and isolation apparatus according to an embodiment of the present invention. As shown in fig. 6, the apparatus for testing the function index of the multi-loop fault suppression and isolation apparatus of the present embodiment includes: the initialization module 610, the fault condition generation module 620, the primary simulation module 630, the device information acquisition module 640, the secondary simulation module 650, and the index determination module 660, each of which is described in detail as follows:
the initialization module 610 is configured to initialize a power distribution network networking model pre-established in the real-time digital simulator according to actual operation information of the multi-loop power distribution network with the arc suppression coil grounded;
the fault condition generating module 620 is configured to obtain a current fault condition according to a fault occurrence model corresponding to the networking model of the power distribution network in the real-time digital simulator;
the primary simulation module 630 is configured to control the real-time digital simulator to perform multi-loop power distribution network simulation under the current fault condition based on the current power distribution network networking model, so as to obtain a first current-voltage analog signal of the multi-loop power distribution network;
the device information obtaining module 640 is configured to transmit the first current-voltage analog signal to a multi-loop fault suppression and isolation device to be tested; acquiring a digital control signal, a grounding line selection result and a capacitance current measurement value which are output by the multi-loop line fault suppression and isolation device according to the first current-voltage analog signal;
the secondary simulation module 650 is configured to adjust the power distribution network networking model according to the digital control signal, and control the real-time digital simulator to perform multi-loop power distribution network simulation again based on the adjusted power distribution network networking model, so as to obtain a second current-voltage analog signal of the multi-loop power distribution network;
the index determining module 660 is configured to determine a functional index of the multiple-circuit line fault suppression and isolation apparatus according to the fault condition, the ground line selection result, the measured value of the capacitance current, the first current-voltage analog signal, and the second current-voltage analog signal.
In an optional embodiment, the networking model of the power distribution network includes: the system comprises a large power grid model, a transformer model, a grounding transformer model, a phase-controlled arc suppression coil model, a cable model and/or a load model.
In an alternative embodiment, the fault condition includes: fault location, time of occurrence of fault, number of faulty lines, transition resistance, initial angle of ground, and/or intermittent time.
In an optional embodiment, the index determining module 660 is specifically configured to:
determining a grounding line selection function index of the multi-loop fault suppression and isolation device according to a fault condition and a grounding line selection result output by the multi-loop fault suppression and isolation device under the fault condition;
determining a capacitance current measurement function index of a multi-loop fault suppression and isolation device according to a fault condition and a capacitance current measurement value output by the multi-loop fault suppression and isolation device under the fault condition;
and determining an arc overvoltage suppression function, a ground residual current suppression function and/or a ground start response speed of the multi-loop fault suppression and isolation device according to the first current-voltage analog signal and the second current-voltage analog signal.
In an optional embodiment, the device information obtaining module 650 is specifically configured to input the first current-voltage analog signal into a signal panel cabinet for amplification, and transmit the amplified analog signal to a multi-loop fault suppression and isolation device to be tested through the signal panel cabinet; and a current transformer and a voltage transformer are arranged in the signal screen cabinet.
It should be noted that, in the above embodiment of the apparatus for testing multiple-circuit fault suppression and isolation apparatus, because the contents of information interaction, execution process, and the like between the modules are based on the same concept as the foregoing method embodiment of the present invention, the technical effect brought by the embodiment is the same as the foregoing method embodiment of the present invention, and specific contents may refer to the description in the method embodiment of the present invention, and are not described again here.
In addition, in the above exemplary embodiment of the apparatus for testing a function index of a multi-loop fault suppression and isolation apparatus, the logical division of each functional module is only an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, for example, due to the configuration requirements of corresponding hardware or the convenience of implementation of software, that is, the internal structure of the apparatus for testing a function index of a multi-loop fault suppression and isolation apparatus is divided into different functional modules to perform all or part of the above described functions. The functional modules can be realized in a hardware mode or a software functional module mode.
It will be understood by those skilled in the art that all or part of the processes of the methods of the above embodiments may be implemented by a computer program, which is stored in a computer readable storage medium and sold or used as a stand-alone product. The program, when executed, may perform all or a portion of the steps of the embodiments of the methods described above. In addition, the storage medium may be provided in a computer device, and the computer device further includes a processor, and when the processor executes the program in the storage medium, all or part of the steps of the embodiments of the methods described above can be implemented. The storage medium may be a magnetic disk, an optical disk, a Read-only Memory (ROM), a Random Access Memory (RAM), or the like.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments. It will be understood that the terms "first," "second," and the like as used herein are used herein to distinguish one object from another, but the objects are not limited by these terms.
The above-described examples merely represent several embodiments of the present invention and should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for testing the function index of a multi-loop fault suppression and isolation device is characterized by comprising the following steps:
initializing a power distribution network networking model pre-established in a real-time digital simulator according to actual operation information of the multi-loop power distribution network with the arc suppression coil grounded;
obtaining a current fault condition according to a fault occurrence model corresponding to the power distribution network networking model in the real-time digital simulator;
controlling a real-time digital simulator to simulate the multi-loop power distribution network under the current fault condition based on the current power distribution network networking model to obtain a first current-voltage analog signal of the multi-loop power distribution network;
transmitting the first current-voltage analog signal to a multi-loop fault suppression and isolation device to be tested; acquiring a digital control signal, a grounding line selection result and a capacitance current measurement value which are output by the multi-loop line fault suppression and isolation device according to the first current-voltage analog signal;
adjusting the power distribution network networking model according to the digital control signal, and controlling a real-time digital simulator to perform multi-loop power distribution network simulation again based on the adjusted power distribution network networking model to obtain a second current-voltage analog signal of the multi-loop power distribution network;
and determining the functional index of the multi-loop fault suppression and isolation device according to the fault condition, the grounding line selection result, the capacitance current measurement value, the first current-voltage analog signal and the second current-voltage analog signal.
2. The method of claim 1, wherein determining the functional indicator of the multi-loop fault suppression and isolation device based on the fault condition, the ground selection result, the measured value of the capacitance current, the first current-voltage analog signal, and the second current-voltage analog signal comprises:
determining a grounding line selection function index of the multi-loop fault suppression and isolation device according to a fault condition and a grounding line selection result output by the multi-loop fault suppression and isolation device under the fault condition;
determining a capacitance current measurement function index of a multi-loop fault suppression and isolation device according to a fault condition and a capacitance current measurement value output by the multi-loop fault suppression and isolation device under the fault condition;
and determining an arc overvoltage suppression function index, a ground residual current suppression function index and/or a ground starting response speed of the multi-loop fault suppression and isolation device according to the first current-voltage analog signal and the second current-voltage analog signal.
3. The method of claim 1, wherein the power distribution grid networking model comprises: providing a large power grid model of a three-phase alternating current voltage source, a transformer model connected with the three-phase alternating current voltage source, a grounding transformer model connected with the ground, a phase-control arc suppression coil model, a cable model and/or a load model;
and/or the presence of a gas in the gas,
the fault conditions include: fault location, time of occurrence of fault, number of faulty lines, transition resistance, initial angle of ground, and/or intermittent time.
4. The method according to any one of claims 1 to 3, wherein the step of transmitting the first current-voltage analog signal to the multi-loop fault suppression and isolation device to be tested comprises:
inputting the first current-voltage analog signal into a signal screen cabinet for amplification, and transmitting the amplified analog signal to a multi-loop fault suppression and isolation device to be tested through the signal screen cabinet; and a current transformer and a voltage transformer are arranged in the signal screen cabinet.
5. A device for testing the function index of a multi-loop fault suppression and isolation device is characterized by comprising:
the initialization module is used for initializing a power distribution network networking model which is pre-established in the real-time digital simulator according to the actual operation information of the multi-loop power distribution network with the grounded arc suppression coil;
the fault condition generation module is used for obtaining the current fault condition according to a fault occurrence model corresponding to the power distribution network networking model in the real-time digital simulator;
the primary simulation module is used for controlling the real-time digital simulator to simulate the multi-loop power distribution network under the current fault condition based on the current power distribution network networking model so as to obtain a first current-voltage analog signal of the multi-loop power distribution network;
the device information acquisition module is used for transmitting the first current-voltage analog signal to a multi-loop fault suppression and isolation device to be tested; acquiring a digital control signal, a grounding line selection result and a capacitance current measurement value which are output by the multi-loop line fault suppression and isolation device according to the first current-voltage analog signal;
the secondary simulation module is used for adjusting the power distribution network networking model according to the digital control signal, and controlling the real-time digital simulator to perform multi-loop power distribution network simulation again based on the adjusted power distribution network networking model to obtain a second current-voltage simulation signal of the multi-loop power distribution network;
and the index determining module is used for determining the functional index of the multi-circuit line fault suppression and isolation device according to the fault condition, the grounding line selection result, the capacitance current measurement value, the first current-voltage analog signal and the second current-voltage analog signal.
6. The apparatus of claim 5, wherein the power distribution network networking model comprises: the system comprises a large power grid model, a transformer model, a grounding transformer model, a phase-control arc suppression coil model, a cable model and/or a load model;
and/or the presence of a gas in the gas,
the fault conditions include: fault location, time of occurrence of fault, number of faulty lines, transition resistance, initial angle of ground, and/or intermittent time.
7. The apparatus for testing a function index of a multi-loop fault suppression and isolation apparatus according to claim 5 or 6, wherein the index determination module is specifically configured to:
determining a grounding line selection function index of the multi-loop fault suppression and isolation device according to a fault condition and a grounding line selection result output by the multi-loop fault suppression and isolation device under the fault condition;
determining a capacitance current measurement function index of a multi-loop fault suppression and isolation device according to a fault condition and a capacitance current measurement value output by the multi-loop fault suppression and isolation device under the fault condition;
determining an arc overvoltage suppression function index, a ground residual current suppression function index and/or a ground start response speed of the multi-loop fault suppression and isolation device according to the first current-voltage analog signal and the second current-voltage analog signal;
and/or the presence of a gas in the gas,
the device information acquisition module is specifically used for inputting the first current-voltage analog signal into a signal screen cabinet for amplification processing, and transmitting the amplified analog signal to a multi-loop fault suppression and isolation device to be tested through the signal screen cabinet; and a current transformer and a voltage transformer are arranged in the signal screen cabinet.
8. A system for testing the function index of a multi-loop fault suppression and isolation device is characterized by comprising: the system comprises a real-time digital simulator, a signal screen cabinet and a multi-loop fault suppression and isolation device to be tested; a power distribution network networking model and a corresponding fault occurrence model are established in the real-time digital simulator; a current transformer and a voltage transformer are arranged in the signal screen cabinet;
the analog signal output interface of the real-time digital simulator is connected with the input interface of the signal screen cabinet, and the output interface of the signal screen cabinet is connected with the analog signal input interface of the multi-loop fault suppression and isolation device to be tested; the digital signal input interface of the real-time digital simulator is connected with the digital signal output interface of the multi-circuit fault suppression and isolation device;
the real-time digital simulator outputs a first current-voltage analog signal of the multi-loop power distribution network under the current fault condition, which is obtained based on the power distribution network networking model and the fault occurrence model in a simulation mode, to a signal screen cabinet; amplifying the first current-voltage analog signal through a current transformer and a voltage transformer in a signal screen cabinet, and outputting the amplified analog signal to the multi-circuit fault suppression and isolation device; the multi-circuit fault suppression and isolation device outputs a corresponding digital control signal to the real-time digital simulator; the multi-circuit fault suppression and isolation device also outputs a grounding line selection result and a capacitance current measurement value under the current fault condition;
the real-time digital simulator adjusts a power distribution network networking model according to the digital control signal output by the multi-circuit fault suppression and isolation device, and performs multi-circuit power distribution network simulation again based on the adjusted power distribution network networking model to obtain a second current-voltage analog signal of the multi-circuit power distribution network;
and determining the functional index of the multi-loop fault suppression and isolation device according to the simulated fault condition in the real-time digital simulator, the grounding line selection result and the capacitance current measurement value output by the multi-loop fault suppression and isolation device, and the first current-voltage analog signal and the second current-voltage analog signal obtained by the simulation of the real-time digital simulator.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 4.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the steps of the method of any of claims 1 to 4 are performed when the program is executed by the processor.
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| CN100492872C (en) * | 2007-07-19 | 2009-05-27 | 清华大学 | Large destabilization real-time simulation system based on nonlinear robust power system stabilizer |
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