CN111062140A - Real-time digital simulation modeling method and device for power system and simulation test system - Google Patents
Real-time digital simulation modeling method and device for power system and simulation test system Download PDFInfo
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Abstract
The application provides a real-time digital simulation modeling method, a real-time digital simulation modeling device and a simulation test system for an electric power system, wherein the method comprises the following steps: acquiring equipment parameters and action events of a typical grid structure of an electric power system; building a class element module in RTDS simulation software based on the equipment parameters and the action events; and building a power system simulation model based on the class element module. The primary side element, the control element and the control script of the power system are arranged in a matched mode to obtain the primary side element and the class element module combined with the related control system and action events, so that the primary side element, the control system and the script code in the class element module can be called only by calling the class element module which is constructed in a matched mode in advance in a simulation test, and the technical problems that the RTDS simulation modeling workload is large and the modification efficiency is low in the conventional simulation test are solved.
Description
Technical Field
The present application relates to the field of digital simulation technologies, and in particular, to a real-time digital simulation modeling method and device for an electrical power system, and a simulation test system.
Background
The rtds (real Time Digital simulation) real-Time Digital simulation system is widely applied to simulation tests of various power equipment in the industry by virtue of the advantages of full Digital simulation technology, abundant electromagnetic transient models of the power system, high simulation precision and the like, and particularly to verification tests of power system control protection devices such as relay protection, load shedding execution stations and automatic bus transfer.
At present, the RTDS simulation test is basically realized by controlling the simulation test through a script, and the existing RTDS automatic simulation test is based on a built power system simulation model, so that the technical problems of large simulation modeling workload and low script code modification efficiency exist for different test projects.
Disclosure of Invention
The application provides a real-time digital simulation modeling method and device for an electric power system and a simulation test system, which are used for solving the technical problems of large simulation modeling workload and low script code modification efficiency of the conventional RTDS automatic simulation test method.
In view of this, the first aspect of the present application provides a real-time digital simulation modeling method for an electric power system, including:
acquiring equipment parameters and action events of a typical grid structure of an electric power system, wherein the equipment parameters comprise: system power supply parameters, line voltage class parameters, line impedance parameters, circuit breaker parameters, and disconnector parameters, the action events include: short circuit faults and switching actions;
constructing a class element module based on the device parameters and the action events, wherein the class element module comprises: the simulation system comprises a primary side element model, a control model and script codes, wherein the control model is used for controlling the primary side element model to execute action events, and the script codes are used for controlling actions of the primary side element model in a simulation process;
and building a power system simulation model based on the element-like model so as to carry out power equipment simulation test through the power system simulation model.
Optionally, the method further comprises:
if at least two similar element models of the same type exist in the power system simulation model, updating default equipment information of the similar element models, wherein the updating mode of the default equipment information comprises the following steps: and updating the primary side element name of a Draft interface in RTDS simulation software and updating the parameter name corresponding to the primary side element name in the script file.
Optionally, the method further comprises:
and obtaining parameter values corresponding to the parameter names one by one, and assigning the parameters of the script file according to the corresponding relation between the parameter values and the parameter names.
The second aspect of the present application provides a real-time digital simulation modeling apparatus for an electric power system, comprising:
the modeling data acquisition unit is used for acquiring equipment parameters and action events of a typical grid structure of the power system, wherein the equipment parameters comprise: system power supply parameter, line voltage grade parameter, line impedance parameter, circuit breaker parameter and isolator parameter, the action event includes: short circuit faults and switching actions;
a class component model modeling unit, configured to construct a class component module based on the device parameter and the action event, where the class component module includes: the primary side element and a control system for controlling the primary side element to execute action events, and also comprises script codes related to actions of the primary side element in a script file for controlling an RTDS simulation system to realize automatic simulation;
and the power system simulation model modeling unit is used for building a power system simulation model based on the element-like module so as to carry out power equipment simulation test through the power system simulation model.
Optionally, the method further comprises:
the class element objectification unit is used for updating default information of class elements if at least two class elements of the same type exist in the power system simulation model, wherein the updating mode of the default information comprises the following steps: updating the primary component name of a Draft interface in RTDS simulation software and updating the name corresponding to the primary component name in a script file.
Optionally, the method further comprises:
and the parameter assignment unit is used for acquiring parameter values which are in one-to-one correspondence with the parameter names and assigning the parameters of the script file according to the correspondence between the parameter values and the parameter names.
A third aspect of the present application provides a real-time digital simulation test system, comprising: the system comprises an RTDS simulation system, a hard pressing plate relay switching circuit and a tested device;
the RTDS simulation system comprises a power system simulation model built by the power system real-time digital simulation modeling method in the first aspect of the application;
the control end of the hard pressing plate relay switching circuit is connected with the signal output end of a GTDO board card of the RTDS simulation system, and the wiring loop end of the hard pressing plate relay switching circuit is connected with a loop where the hard pressing plate of the device to be tested is located.
Optionally, the hard pressing plate relay switching circuit specifically includes: a normally open relay switch and a hard pressing plate on-off switch;
a coil of the normally open relay switch is connected in series with a signal output end of the GTDO board card of the RTDS simulation system, and a switch contact of the normally open relay switch is connected with the hard pressing plate on-off switch;
and the hard pressing plate switching-on/off switch is connected with a protection action loop or a tripping action loop of the tested device.
According to the technical scheme, the embodiment of the application has the following advantages:
the application provides a real-time digital simulation modeling method for an electric power system, which comprises the following steps: acquiring equipment parameters and action events of a typical grid structure of an electric power system, wherein the equipment parameters comprise: system power supply parameter, line voltage grade parameter, line impedance parameter, circuit breaker parameter and isolator parameter, the action event includes: short circuit faults and switching actions; constructing a class element module based on the device parameters and the action events, wherein the class element module comprises: the simulation system comprises a primary side element model, a control model for controlling the primary side element to execute action events, and script codes related to actions of the primary side element in a script file for controlling an RTDS simulation system to realize automatic simulation; and constructing a power system simulation model based on the class element module so as to carry out power equipment simulation test through the power system simulation model.
The primary side element, the control element and the control script of the power system are arranged in a matched mode to obtain the class element module of the primary side element and the combination of the related control system and the action event, so that the class element module which is constructed in a matched mode in advance only needs to be called when simulation modeling is conducted, the class element is assembled after being objectified, and the corresponding script codes are combined to obtain the power system simulation model. The model is not required to be built from beginning to end according to each specific simulation test, the script codes are not required to be compiled from beginning to end, and only the parameters of the combined script codes are required to be updated synchronously, so that the technical problems of large modeling workload and low modification efficiency of the conventional RTDS automatic simulation test are solved.
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In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic flow chart diagram illustrating a first embodiment of a real-time digital simulation modeling method for an electrical power system according to the present application;
FIG. 2 is a schematic flow chart diagram illustrating a real-time digital simulation modeling method for an electrical power system according to a second embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a first embodiment of a real-time digital simulation modeling apparatus for an electrical power system according to the present application;
fig. 4 is a schematic diagram of an automatic hard platen switching control of the real-time digital simulation test system provided in the present application.
Detailed Description
The embodiment of the application provides a real-time digital simulation modeling method and device for an electric power system and a simulation test system, and is used for solving the technical problems of large simulation modeling workload and low script code modification efficiency of the conventional automatic test method based on an RTDS (real time digital system) simulation system.
It should be noted that, the existing RTDS simulation test is usually performed in a script control manner, but a script file is compiled based on a built power system simulation model, and during simulation, the compiled script file is loaded into the RTDS simulation model to implement automatic simulation control. And if the structure of the power system is changed, the power system simulation model needs to be built again. Meanwhile, because the script file is compiled based on a specific simulation model, if the system structure of the simulation model or the action event related to the test project changes, the corresponding script code also needs to be modified, and the modification can only be compiled and modified by professionals familiar with RTDS simulation software, so that the technical problems of huge workload of the conventional RTDS simulation modeling and low efficiency of script code modification are caused.
In order to make the objects, features and advantages of the present invention more apparent and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the embodiments described below are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, an embodiment of the present application provides a real-time digital simulation modeling method for an electric power system, including:
The equipment parameters comprise system power supply parameters, bus and line voltage grades, line impedance, circuit breaker and disconnecting switch parameters and the like, and the action events comprise short-circuit faults, switch action conditions and the like;
and 102, constructing a class component module based on the equipment parameters and the action events.
Wherein the class component module comprises: the simulation system comprises a primary side element model, a control model for controlling the primary side element model to execute action events, and script codes related to actions of the primary side element in a script file for controlling an RTDS simulation system to realize automatic simulation;
and 103, building a power system simulation model based on the class element module so as to carry out power equipment simulation test through the power system simulation model.
It should be noted that the class component module of the present embodiment is implemented in the RTDS simulation software, and the combination of the primary-side component of the power system and the relevant control system model thereof, and the corresponding control script code are implemented in the RTDS Draft modeling interface. For the logic function test of the power system control protection device, the dynamic process of the power system is often required to be simulated by setting various working conditions such as faults, switch changes and the like, and the method relates to the matching setting of a primary side element, a control system and a related control script of the power system. The method comprises the steps of constructing a control system model which is frequently used in a simulation test and realizes a related action sequence in a matched manner in advance, and controlling automatic simulation by script codes.
The class element comprises a primary element with specific parameters and a series of action events thereof. In an electric power system, there are many primary side elements with similar properties and action events, and the common primary side elements include a line fault, a system side switch, a transformer high-voltage side switch, a transformer low-voltage side switch, a line switch, a small power switch and the like.
In the RTDS Draft modeling interface, the input signals to the class components typically include fault signals, other switch actuation signals, and the device under test turn-on amount. And storing the Script template file of the action event in the same directory of the class element library so as to facilitate the calling of an external control program. The Script code defines the standard function format, and the external control program implements execution of different test code segments by means of parameter transmission to complete each test item. In the Script file of this embodiment, parameters such as a fault location, a transition resistance, a fault time, a fault-to-switch operation time interval, and a reclosing time, which are input by a user, are transferred to a function variable of the Script to change an operation sequence.
According to the method, the primary side element, the control element and the control script code of the power system in the RTDS simulation software are set in a matched mode, the primary side element, the related control system and the related action event combined class element module are obtained by referring to the structure of the object programming class, so that the pre-matched class element module can be called in the simulation test, namely the primary side element, the control element and the script code in the class element module can be called, the RTDS simulation model does not need to be built from zero according to a new power system model structure, the script code does not need to be written from zero, and the technical problems that the modeling workload is large and the script file modification efficiency is low in the conventional power equipment simulation test based on the RTDS simulation system are solved. Meanwhile, the objectification of the class elements enables testers to realize the building of the simulation system through rapid combination, reduces the repeated work of the building control link of the RTDS control element based on the minimum unit and meeting the test condition, and reduces the requirements of the testers on the operation aspect of RTDS simulation software.
The above is a detailed description of a first embodiment of a real-time digital simulation modeling method for an electric power system provided by the present application, and the following is a detailed description of a second embodiment of the real-time digital simulation modeling method for the electric power system provided by the present application.
Referring to fig. 2, an embodiment of the present application provides a real-time digital simulation modeling method for an electric power system, and based on the first embodiment, the method of the embodiment further includes:
and 104, if at least two similar component modules of the same type exist in the power system simulation model, updating default equipment information of the similar component modules.
The updating mode of the default equipment information comprises the following steps: and updating the primary component name of a Draft interface in RTDS simulation software and updating the parameter name corresponding to the primary component name in the script file. The class element module is a class element module forming a simulation system model;
the updating mode of the equipment information comprises the following steps: insert characters and/or replace characters, change the default name of the device.
It should be noted that all parameter names of the class component module in this embodiment include a DefaultName (default name) as a parameter identifier of the class component, which indicates that the parameter belongs to a certain class component. And replacing the Default Name part of the class element parameter Name with a specific element Name through an Expression Edit interface, so that objectification of the class element can be realized. When a certain class element is used twice or more than twice in the same Draft file, the class element needs to be objectified respectively, namely the same name is not allowed to appear in two places. And simultaneously, the automatic test control software matches the Default Name part of the class element in the Script template according to the class element Name input by the user and the objectified element Name, and completely replaces the Default Name part with the objectified element Name, thereby generating the exclusive Script customized version of each element.
Wherein the detailed updating process of the class element information comprises the following steps: the identification characters, such as numbers 1, 2, 3 or letters, can be inserted, such as replacing the default name LineBrk of the class element with LineBrk1, LineBrk2, LineBrk3, the specific number can be determined according to the actual number, after the updated class element name, the LineBrk in the control signal Ctl _ LineBrk is replaced with LineBrk1, LineBrk2, LineBrk3, and the control signals of the objectified class elements are: ctl _ LineBrk1, Ctl _ LineBrk2 and Ctl _ LineBrk 3.
Further, the method of this embodiment further includes:
and 105, acquiring parameter values corresponding to the parameter names one by one, and assigning the parameters of the script file according to the corresponding relation between the parameter values and the parameter names.
After the RTDS simulation model is built, functional test items are input on the user interface of the automatic test control software, input test sub-items and parameters such as specific fault positions, transition resistances, action time constants and the like required by the test sub-items are expanded below the functional test items, and the power equipment simulation test is performed through the built RTDS simulation software of the power system.
And then, extracting script parameter values from the test sub-item parameters set by the user, and assigning the script parameter values to corresponding parameter names so as to control the power system simulation model to perform power equipment simulation tests through the script files subjected to parameter assignment.
In addition, step 105 of this embodiment belongs to an optional step, for example, historical test item information may be stored in a database of the automatic test software, and if the system already has historical data of the test item and does not need to change the data, or if default initial parameters can be used, script parameters do not need to be acquired.
The above is a detailed description of the second embodiment of the real-time digital simulation modeling method for the power system provided by the present application, and the following is a detailed description of the first embodiment of the real-time digital simulation modeling apparatus for the power system provided by the present application.
Referring to fig. 3, an embodiment of the present application provides a real-time digital simulation modeling apparatus for an electric power system, including:
a modeling data obtaining unit 301, configured to obtain device parameters and action events of a typical grid structure of an electric power system, where the device parameters include: system power supply parameter, line voltage grade parameter, line impedance parameter, circuit breaker parameter and isolator parameter, the action event includes: short circuit faults and switching actions;
a class component module modeling unit 302, configured to construct a class component module based on the device parameter and the action event, where the class component module includes: the primary side element model and a control model used for controlling the primary side element model to execute the action event;
and the power system simulation model modeling unit 303 is configured to build a power system simulation model based on the class element module, so as to perform a power equipment simulation test through the power system simulation model.
Further, still include:
a class component module objectification unit 304, configured to update default device information of class component modules if at least two class component modules of the same type exist in the power system simulation model, where an update manner of the default device information includes: and updating the primary side element name of a Draft interface in RTDS simulation software and updating the parameter name corresponding to the primary side element name in the script file.
Further, still include:
a parameter assigning unit 305, configured to obtain parameter values corresponding to the parameter names one by one, and assign the parameters of the script file according to the correspondence between the parameter values and the parameter names.
The above is a detailed description of the second embodiment of the real-time digital simulation modeling method for the power system provided by the present application, and the following is a detailed description of the first embodiment of the real-time digital simulation modeling apparatus for the power system provided by the present application.
Referring to fig. 4, an embodiment of the present application provides a real-time digital simulation testing system, an RTDS simulation system, a hard platen relay switching circuit, and a device under test;
the RTDS simulation system comprises a power system simulation model constructed by the power system real-time digital simulation modeling method in the first embodiment or the second embodiment of the application;
the control end of the hard pressure plate relay switching circuit is connected with the signal output end of a GTDO (gigabit Transceiver Digital Ouput Card) of the RTDS simulation system, and the wiring loop end of the hard pressure plate relay switching circuit is connected with the tested device.
More specifically, the hard platen relay on/off circuit of this embodiment specifically includes: a normally open relay switch and a hard pressing plate on-off switch;
a coil of the normally open relay switch is connected in series with a signal output end of the GTDO board card of the RTDS simulation system, and a switch contact of the normally open relay switch is connected with the hard pressing plate on-off switch;
and the hard pressing plate switching-on/off switch is connected with a protection action loop or a tripping action loop of the tested device.
It should be noted that the hard platen relay on/off circuit of this embodiment has a normally open relay switch connected to both ends of the hard platen to realize opening the closed and open of the control hard platen place return circuit through the RTDS, simulate the hard platen on/off. The return button is located in a loop, and automatic return can be achieved through the same modification method. When the digital quantity of a signal output by GPC (gigabit-Processor Card) in the GTDO board Card is 1, the triode is conducted, the coil where the relay switch is located is connected to a positive voltage, the coil is through-current, the KJ switch is closed, the loop where the hard pressing plate is located is closed, and the hard pressing plate is put into operation; if the GPC signal output digital quantity is 0, the triode is switched off, the coil loop where the relay switch is located has no voltage, and the loop where the hard pressure plate is located is kept in a normally open state, namely the hard pressure plate is in an exit state.
The hard pressing plate is used for switching on and off the secondary wiring loop in a hard wiring mode. According to the difference of the secondary circuit position of the hard pressing plate access, the hard pressing plate has different functions. If the protection function hard pressing plate realizes the switching of certain functions in the protection device; the trip outlet hard press plate determines the result of the protection action and acts directly on the switch. In the embodiment, the automatic switching of the hard pressing plate is realized by externally connecting the contacts on two sides of the hard pressing plate with the controllable switches, and the automatic switching device is applicable to all hard pressing plates and can effectively simulate the switching on and off of the hard pressing plates.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The terms "first," "second," "third," "fourth," and the like in the description of the application and the above-described figures, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (8)
1. A real-time digital simulation modeling method for an electric power system is characterized by comprising the following steps:
acquiring equipment parameters and action events of a typical grid structure of an electric power system, wherein the equipment parameters comprise: system power supply parameters, line voltage class parameters, line impedance parameters, circuit breaker parameters, and disconnector parameters, the action events include: short circuit faults and switching actions;
constructing a class element module based on the device parameters and the action events, wherein the class element module comprises: the simulation system comprises a primary side element model, a control model and script codes, wherein the control model is used for controlling the primary side element model to execute action events, and the script codes are used for controlling actions of the primary side element model in a simulation process;
and constructing a power system simulation model based on the element-like module so as to carry out power equipment simulation test through the power system simulation model.
2. The real-time digital simulation modeling method for the power system according to claim 1, characterized by further comprising:
if at least two similar component modules of the same type exist in the power system simulation model, updating default equipment information of the similar component modules, wherein the updating mode of the default equipment information comprises the following steps: and updating the primary side element name of a Draft interface in RTDS simulation software and updating the parameter name corresponding to the primary side element name in the script code.
3. The real-time digital simulation modeling method for the power system according to claim 2, characterized by further comprising:
and obtaining parameter values corresponding to the parameter names one by one, and assigning the parameters of the script file according to the corresponding relation between the parameter values and the parameter names.
4. A real-time digital simulation modeling device for an electric power system is characterized by comprising:
the modeling data acquisition unit is used for acquiring equipment parameters and action events of a typical grid structure of the power system, wherein the equipment parameters comprise: system power supply parameter, line voltage grade parameter, line impedance parameter, circuit breaker parameter and isolator parameter, the action event includes: short circuit faults and switching actions;
a class component module modeling unit, configured to construct a class component module based on the device parameter and the action event, wherein the class component module includes: the simulation system comprises a primary side element model, a control model and script codes, wherein the control model is used for controlling the primary side element model to execute action events, and the script codes are used for controlling actions of the primary side element model in a simulation process;
and the power system simulation model modeling unit is used for building a power system simulation model based on the element-like module so as to carry out power equipment simulation test through the power system simulation model.
5. The real-time digital simulation modeling apparatus for electric power system according to claim 4, further comprising:
the class component module objectification unit is used for updating default component information of the class component modules if at least two class component modules of the same type exist in the power system simulation model, wherein the updating mode of the default component information comprises the following steps: and updating the primary side element name of a Draft interface in RTDS simulation software and updating the parameter name corresponding to the primary side element name in the script file.
6. The real-time digital simulation modeling apparatus for electric power system according to claim 5, further comprising:
and the parameter assignment unit is used for acquiring parameter values which are in one-to-one correspondence with the parameter names and assigning the parameters of the script file according to the correspondence between the parameter values and the parameter names.
7. A real-time digital simulation test system, comprising: the system comprises an RTDS simulation system, a hard pressing plate relay switching circuit and a tested device;
the RTDS simulation system comprises a power system simulation model built by the power system real-time digital simulation modeling method of any one of claims 1 to 3;
the control end of the hard pressing plate relay switching circuit is connected with the signal output end of the GTDO board card of the RTDS simulation system, and the wiring loop end of the hard pressing plate relay switching circuit is connected with the device to be tested.
8. The real-time digital simulation test system according to claim 7, wherein the hard platen relay on/off circuit specifically comprises: a normally open relay switch and a hard pressing plate on-off switch;
a coil of the normally open relay switch is connected in series with a signal output end of the GTDO board card of the RTDS simulation system, and a switch contact of the normally open relay switch is connected with the hard pressing plate on-off switch;
and the hard pressing plate switching-on/off switch is connected with a protection action loop or a tripping action loop of the tested device.
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