CN116298440A - State sequence simulation method for realizing coupling of multisource abnormal working conditions of power system - Google Patents
State sequence simulation method for realizing coupling of multisource abnormal working conditions of power system Download PDFInfo
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Abstract
The invention discloses a state sequence simulation method for realizing multi-source abnormal condition coupling of a power system, which increases a simulatable data source in a state sequence by an abnormal source registration mode; superposing the registered transient fault data information of the system into steady-state electric quantity output data in a data coupling mode; and coupling the composite fault electric quantity output data, the switching value data information and other abnormal source data information into a time sequence beat sequence in a time sequence coupling mode, and simulating the power system fault in a state sequence mode. The invention can simulate various transient faults, auxiliary equipment faults, communication signal faults and other abnormal working conditions of the composite power system of the power system through a single device, does not need a simulation system, has high test efficiency and has strong practicability.
Description
Technical Field
The invention relates to a power secondary equipment testing technology, in particular to a state sequence simulation method for realizing multi-source abnormal condition coupling of a power system.
Background
The action principle of the protection control equipment of the electric power system is to discriminate faults and take corresponding measures after logic judgment according to the collected external electric quantity information, switching value information and communication information. The principle of the protection control equipment is tested by utilizing external test equipment to generate various fault electrical quantity waveforms and simulating fault phenomena by matching with switching value information to check whether the action condition of the protection control equipment is correct.
At present, closed loop static test of secondary equipment basically adopts steady-state electric quantity to simulate faults, namely sine waves or cosine waves with fixed amplitude and frequency of fundamental waves or integer times of harmonic waves. If communication faults such as channel interruption, error code and the like are to be simulated, the communication faults can be realized only by setting external simulation equipment, and synchronous control with a state sequence can not be realized; if the transient waveform containing the attenuated direct current component or the attenuated non-direct current component is to be simulated, the transient waveform is mostly realized by adopting a real-time digital simulation system, the test system and the setting are complex, and the professional requirement level of the test personnel is high.
Disclosure of Invention
The invention aims to: the invention aims to provide a state sequence simulation method for realizing multi-source abnormal condition coupling of a power system, which utilizes the flexibility of script files and increases a simulatable data source in a state sequence in an abnormal source registration mode; superposing the registered transient fault data information of the system into steady-state electric quantity output data in a data coupling mode; the composite fault electric quantity output data, switching value data information and other abnormal source data information are coupled into a time sequence beat sequence in a time sequence coupling mode, and the power system faults are simulated in a state sequence mode, so that a comprehensive and simple test method is provided for secondary equipment of the power system.
The technical scheme is as follows: the invention discloses a state sequence simulation method for realizing multi-source abnormal condition coupling of a power system, which increases a simulatable data source in a state sequence by an abnormal source registration mode; superposing the registered transient fault data information of the system into steady-state electric quantity output data in a data coupling mode; and coupling the composite fault electric quantity output data, the switching value data information and other abnormal source data information into a time sequence beat sequence in a time sequence coupling mode, and simulating the power system fault in a state sequence mode.
A state sequence simulation method for realizing multi-source abnormal condition coupling of a power system comprises the following steps:
(1) In the test equipment software, various abnormal sources are registered through a state sequence data source interface, registration information comprises names, IDs, types, parameters and the like of the abnormal sources, and the abnormal sources realize parameter registration at the state sequence data source interface in a key value pair mode.
(2) According to the simulation demand, setting each state parameter of a state sequence, wherein the state parameter comprises an abnormal source parameter, and the abnormal source parameter comprises transient state electric quantity fault information and communication state simulation information.
And (2.1) setting the numerical value and the time sequence of the steady-state electric quantity and the switching value through the state sequence parameters.
And (2.2) setting transient electric quantity fault information, communication signals and other abnormal source parameters through a script file. The parameter setting of the script file can be modified in the automatic test cases, so that batch automatic test of the test cases is realized.
And (2.3) changing the number of state sequences according to the actual state conditions, and sequentially setting the parameters according to the states.
(3) The tester extracts switching value and steady-state electric value parameters in the state sequence, analyzes the script to obtain transient electric value and communication state analog signal parameters, completes data coupling of time sequence information and switching value states, completes data coupling of the time sequence information and the electric value, and forms an output data sequence.
And (3.1) respectively extracting the switching value and the steady-state electric quantity setting value and the time sequence parameter in each state.
And (3.2) analyzing the script file, and extracting transient electric quantity, communication signals and other abnormal source parameters.
And (3.3) carrying out coupling processing on the data according to the type of the abnormal source.
(3.3.1) coupling the value with the time sequence for the switching value data to obtain a switching value sequence finally output.
And (3.3.2) for electrical quantity data, respectively coupling the steady-state electrical quantity with the transient electrical quantity and the time sequence, respectively performing sampling value discrete processing, and then performing data coupling superposition on the sampling values of the steady-state electrical quantity and the transient electrical quantity according to the time sequence to obtain a final output electrical quantity sequence.
The electrical quantity class data source information is abstracted into an attenuated direct current component and an attenuated non-direct current component, and the following formula is adopted:
in the method, in the process of the invention,
The abnormal electrical quantity information parameters include: the amplitude and decay time constant of the decaying direct current component, the amplitude, initial phase angle, frequency and decay time constant of various decaying non-direct current components, etc.
(3.3.3) for control type faults, coupling the control command with the time sequence to obtain a final output command sequence.
(4) And outputting the electric quantity, the switching value and the command of each state according to the time sequence beats of each sequence.
And (4.1) the switching value output sequence passes through a switching module of the testing equipment and finally drives an external node of the testing equipment.
(4.2) the electric quantity output sequence is changed into low-voltage small-signal analog quantity output through the analog-digital conversion module of the test equipment; the low voltage small signal can generate conventional analog voltage and current by connecting the power amplifier.
And (4.3) calling related functions of the test equipment by the command output sequence to realize a control function.
A computer storage medium having stored thereon a computer program which, when executed by a processor, implements a state sequence simulation method for implementing multi-source abnormal condition coupling of an electrical power system as described above.
A computer device comprises a storage, a processor and a computer program stored in the storage and capable of running on the processor, wherein the processor realizes a state sequence simulation method for realizing multi-source abnormal condition coupling of a power system when executing the computer program.
The beneficial effects are that: compared with the prior art, the invention has the following advantages:
1. the state sequence simulation method for realizing the coupling of the multisource abnormal working conditions of the power system can be applied to a secondary equipment tester of the power system, can simulate fault waveforms containing transient information by flexibly setting fault electrical quantity data output by the state sequence, can simulate the working conditions of abnormal and communication abnormal of composite auxiliary equipment by setting control type output, is closer to actual fault conditions, and can test relay protection principles more effectively.
2. The state sequence simulation method for realizing the coupling of the multisource abnormal working conditions of the power system is simple in steps and has strong practicability.
3. The registration mechanism of the abnormal source adopted by the invention is beneficial to the subsequent addition of more abnormal source modules, thereby continuously perfecting the test environment.
Drawings
FIG. 1 is a block diagram of a simulation flow of a state sequence according to the present invention.
Fig. 2 is a schematic diagram of state sequence data coupling according to the present invention.
Description of the embodiments
The technical scheme of the invention is further described below with reference to the accompanying drawings.
The embodiment simulates a state sequence of a normal state, a fault state and a recovery state, wherein the fault state simultaneously simulates abnormal working conditions of generating fault current and inconsistent channel delay, and the fault current is as follows:
in the method, in the process of the invention,
Firstly, in test equipment software, a channel abnormality simulation module and a transient current simulation module are registered through a state sequence data source interface in a key value pair mode, and the channel abnormality simulation module is taken as an example to register:
{
"name": "CommErr",
"type": "control",
"paras": [
{"paraName":"ctrlMode","value":"single"},
{"paraName":"errMode","value":"delayErr"},
{"paraName":"rxDelay","value":"1"},
{"paraName":"txDelay","value":"2"}]
}
fig. 1 is a block diagram of the simulation flow of the state sequence of the method.
S1, respectively setting parameters of each state sequence of the test equipment, wherein the specific steps are as follows:
s1.1, setting normal state sequence parameters, including: setting a state switching mode to be a state of switching at a fixed duration and setting a duration, and setting the amplitude value, the initial phase angle and the switching value of the steady-state electric quantity;
s1.2, setting fault state sequence parameters, including: the state switching mode is set to be on-off turnover switching through the state sequence parameter, the state of the switching value is set, and the amplitude of the steady-state electric quantity is set
And a primary phase angle->
The method comprises the steps of carrying out a first treatment on the surface of the Setting transient electric quantity fault information parameters including attenuation direct current component initial amplitude +.>
Decay time constant->
Attenuation of the initial amplitude of the non-DC component +.>
Frequency->
Angle of beginnings->
Decay time constant->
The method comprises the steps of carrying out a first treatment on the surface of the The channel module control mode (ctrlMode), the abnormal mode (delayErr), the receiving channel delay (rxdata) and the transmitting channel delay (txdata) are set through script files.
S1.3, setting a recovery state sequence parameter, including: the state switching mode is set to be the state of switching with fixed duration and setting duration, and the amplitude value, the initial phase angle and the switching value of the steady-state electric quantity are set.
It should be noted that, in this embodiment, taking a three-state sequence as an example, the number of state sequences may be increased according to the fault condition that needs to be simulated in practice; in this embodiment, the transient state information of the fault current to be simulated is composed of three parts, and is realized by setting parameters in a script file, and the composition items of the actual transient state information can be increased or decreased as required.
S2, the tester adopts the data coupling method provided by the figure 2 to generate output data of each state sequence. Taking a fault state as an example, the specific steps are as follows:
s2.1, respectively extracting switching value, steady-state electric quantity setting value and state switching time sequence parameter from state sequence setting parameters by the tester;
s2.2, analyzing the script file by the tester, and extracting other abnormal source parameters such as transient electric quantity, communication signals and the like;
s2.3, coupling the time sequence information of the state with a state data value set by the switching value by the tester to obtain a switching value output sequence;
s2.4, the tester couples the time sequence information of the state with a command set by a control class to obtain a control output command sequence;
s2.5, the tester couples the time sequence information of the state with the steady-state electric quantity (namely, the fundamental wave periodic component in the formula 1), and then carries out sampling value discrete processing according to the time of the relative state to obtain an output sequence of the steady-state electric quantity part;
s2.6, the tester couples the time sequence information of the state with the transient state electric quantity (namely the attenuated direct current component and the attenuated non-direct current component in the formula 1), and then carries out sampling value discrete processing according to the time of the relative state to obtain an output sequence of the transient state electric quantity part;
and S2.7, coupling and superposing the sampling data obtained in the steps S2.4 and S2.5 to obtain a final electric quantity output data sequence.
S3, outputting the electric quantity and the switching value of each state by the tester according to the time sequence beats of each sequence, wherein the specific steps are as follows:
the switching value output sequence passes through a switching module and finally drives an external node;
the electric quantity output data sequence is converted into low-voltage small-signal analog quantity output through an analog-to-digital conversion module;
the command output sequence calls related functions of the test equipment to realize a control function.
If the analog voltage and current values are needed to be output as the analog voltage and current values of the secondary system, the power amplifier can be connected in series in the analog loop link.
When the automatic test cases are designed, batch test cases can be formed by changing the mode of setting parameters in the script file, for example, the influence of different closing moments can be simulated by setting parameters such as different initial angles, amplitude values and the like.
Claims (8)
1. A state sequence simulation method for realizing multi-source abnormal condition coupling of a power system is characterized in that a data source which can be simulated in a state sequence is added by an abnormal source registration mode; superposing the registered transient fault data information of the system into steady-state electric quantity output data in a data coupling mode; and coupling the composite fault electric quantity output data, the switching value data information and other abnormal source data information into a time sequence beat sequence in a time sequence coupling mode, and simulating the power system fault in a state sequence mode.
2. The state sequence simulation method for realizing multi-source abnormal condition coupling of a power system according to claim 1, comprising the following steps:
(1) Registering various abnormal sources through a state sequence data source interface;
(2) Setting each state parameter of a state sequence according to a simulation demand, wherein the state parameter comprises an abnormal source parameter, and the abnormal source parameter comprises transient state electric quantity fault information and communication state simulation information;
(3) The tester extracts switching value and steady-state electric value parameters in the state sequence, analyzes the script to obtain transient electric value and communication state analog signal parameters, completes data coupling of time sequence information and switching value states, completes data coupling of the time sequence information and the electric value, and forms an output data sequence;
(4) The tester outputs the electric analog quantity of each state according to the time sequence beat of the state sequence, and drives the external switch node and other devices.
3. The method for simulating the state sequence for realizing the coupling of the multisource abnormal working conditions of the power system according to claim 2, wherein in the step (1), the abnormal sources realize flexible parameter registration of a data source interface of the state sequence in a key value pair mode, so that different data sources can be accessed conveniently.
4. The state sequence simulation method for realizing multi-source abnormal condition coupling of the power system according to claim 2, wherein the step (2) is specifically as follows:
(2.1) setting the numerical value and the time sequence of the steady-state electric quantity and the switching value through the state sequence parameters;
(2.2) setting other abnormal source parameters through a script file; the parameter setting of the script file can be modified in the automatic test cases, so that batch automatic test of the test cases is realized;
and (2.3) changing the number of state sequences according to the actual state conditions, and sequentially setting the parameters according to the states.
5. The state sequence simulation method for realizing multi-source abnormal condition coupling of the power system according to claim 2, wherein the step (3) is specifically:
(3.1) respectively extracting the switching value and the steady-state electric quantity setting value and the time sequence parameter in each state;
(3.2) analyzing the script file and extracting other abnormal source parameters;
(3.3) carrying out coupling processing on the data according to the type of the abnormal source;
(3.3.1) coupling the numerical value with the time sequence for the switching value data to obtain a switching value sequence finally output;
(3.3.2) for electrical quantity data, respectively coupling the steady-state electrical quantity and the transient electrical quantity with time sequences, respectively performing sampling value discrete processing, and performing data coupling superposition on the sampling values of the steady-state electrical quantity and the transient electrical quantity according to the time sequences to obtain a final output electrical quantity sequence;
the transient electrical quantity class data source information is abstracted into an attenuated direct current component and an attenuated non-direct current component, and the following formula is adopted:
in the method, in the process of the invention,
The abnormal electrical quantity information parameters comprise the amplitude and the decay time constant of the decay direct current component, the amplitude, the initial phase angle, the frequency and the decay time constant of various decay non-direct current components;
(3.3.3) for control type faults, coupling the control command with the time sequence to obtain a finally output control command sequence.
6. The state sequence simulation method for realizing multi-source abnormal condition coupling of the power system according to claim 2, wherein the step (4) is specifically as follows:
(4.1) the switching value output sequence passes through a switch module of the test equipment and finally drives an external node of the test equipment;
(4.2) the electric quantity output sequence is changed into low-voltage small-signal analog quantity output through the analog-digital conversion module of the test equipment; the low-voltage small signal can generate conventional analog voltage and current through being connected with a power amplifier;
and (4.3) calling related functions of the test equipment by the command output sequence to realize a control function.
7. A computer storage medium having a computer program stored thereon, which when executed by a processor implements a state sequence simulation method for implementing multi-source abnormal condition coupling of an electrical power system according to any of claims 1-6.
8. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the computer program, implements a state sequence simulation method for implementing a multi-source abnormal condition coupling of an electrical power system according to any one of claims 1-6.
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