CN106844812A - A kind of control protection simulation modeling method based on EMTDC - Google Patents
A kind of control protection simulation modeling method based on EMTDC Download PDFInfo
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Abstract
The invention discloses a kind of control protection simulation modeling method based on EMTDC; the basic function module that be can be set using the execution cycle builds the control relay protective scheme of simulation model; each section of basic function module of logic can use the different execution cycles, and the execution cycle of basic function module is by execution recurrent pulse generation module United Dispatching；Performing recurrent pulse generation module and execution cycle settable basic function module is developed by PSCAD/EMTDC softwares custom feature, performs recurrent pulse generation module, and pulse signal is sent when time interval is equal to the set execution cycle；Basic function module, to perform the output of recurrent pulse generation module as parameter.The present invention can improve the uniformity of simulation model and Practical Project, and simulation result is relatively reliable, and its analysis result can preferably instruct engineering reality.
Description
Technical field
The present invention relates to a kind of control protection simulation modeling method based on EMTDC, belong to power system digital simulation technical field.
Background technology
PSCAD/EMTDC softwares are a powerful electromagnetic transient in power system simulation analysis softwares, are widely used in the various aspects such as power system fault analysis, theoretical research.With the construction of high voltage DC engineering, the electric network composition of China becomes increasingly complex, and the safe and stable operation of power system proposes requirement higher to Power System Analysis technology.The dynamic behaviour that study power system exactly just must be set up detailed, accurately consistent with the Control protection system major function of reality simulation model.Each control module of actual Control protection system is distributed on different task chain, and the execution cycle is different, rather than the unified simulation step length of PSCAD/EMTDC.The standard component that PSCAD/EMTDC is carried in component library does not have the execution periodic scheduling function of multitask, and the simulation model built based on this can cause the simulation result of model to be differed greatly with the operating condition of Practical Project.Therefore, in order to improve the uniformity of simulation model and Practical Project, it is necessary to consider new emulation modelling method.
The content of the invention
In order to solve the above-mentioned technical problem, the invention provides a kind of control protection simulation modeling method based on EMTDC.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of control protection simulation modeling method based on EMTDC; the basic function module that be can be set using the execution cycle builds the control relay protective scheme of simulation model; each section of basic function module of logic can use the different execution cycles, and the execution cycle of basic function module is by execution recurrent pulse generation module United Dispatching；
The basic function module that the execution recurrent pulse generation module and execution cycle can be set is developed by PSCAD/EMTDC softwares custom feature, the execution recurrent pulse generation module, pulse signal is sent when time interval is equal to the set execution cycle；The basic function module, to perform the output of recurrent pulse generation module as parameter.
The execution recurrent pulse generation module includes N number of execution cycle parameter, is output as the flag bit in N number of execution cycle；When time interval is equal to m-th performs the cycle, it is that a high level for PSCAD/EMTDC simulation step lengths is otherwise low level that m-th performs cycle indicator position and is width；Wherein M≤N.
The basic function module is parameter to perform the execution cycle indicator position of recurrent pulse generation module output, once whether the flag bit is high level to the detection of each PSCAD/EMTDC simulation step length, if high level, then perform corresponding computing, otherwise enter next PSCAD/EMTDC emulation cycles, output result keeps constant.
The beneficial effect that the present invention is reached：1st, the present invention builds the control relay protective scheme of simulation model using the basic function module that the execution cycle can be set, and each section of basic function module of logic can use the different execution cycles；The uniformity of simulation model and Practical Project can be improved, simulation result is relatively reliable, its analysis result can preferably instruct engineering reality；2nd, the execution cycle of basic function module is by execution recurrent pulse generation module United Dispatching, facilitates module to perform the setting in cycle, modification and manage.
Brief description of the drawings
Fig. 1 realizes block diagram for the present invention is overall.
Fig. 2 is the execution recurrent pulse generation module in settable five execution cycles.
Fig. 3 is the program flow diagram for performing recurrent pulse generation module.
Fig. 4 is with the three-input adder module for performing cycle set function.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.The following examples are only intended to illustrate the technical solution of the present invention more clearly, and can not be limited the scope of the invention with this.
A kind of control protection simulation modeling method based on EMTDC; the basic function module that be can be set using the execution cycle builds the control relay protective scheme of simulation model; each section of basic function module of logic can use the different execution cycles, and the execution cycle of basic function module is by execution recurrent pulse generation module United Dispatching.
The basic function module that execution recurrent pulse generation module and execution cycle can be set is developed by PSCAD/EMTDC softwares custom feature.Recurrent pulse generation module is performed, pulse signal is sent when time interval is equal to the set execution cycle；Basic function module, to perform the output of recurrent pulse generation module as parameter.
As shown in figure 1, for the entirety of the method realizes block diagram.Perform recurrent pulse generation module and include N number of execution cycle parameter, respectively Level1, Level2, Level3 ... LevelN, the flag bit in array Sample_plus (N) correspondence storage N number of execution cycles of a N-dimensional of output.Two sections of logics in figure employ the different execution cycles.Basic function module 1,2,3 is single-input single-output module, and basic function module 4 is the single output module of 3 inputs；Basic function module 1,2,3,4 with perform recurrent pulse generation module output execution cycle indicator position Sample_plus (M) be parameter, M≤N, the execution cycle of these basic functional blocks is the cycle set by the parameter LevelM for performing recurrent pulse generation module.The input of basic function module 1 is IN1, and the input of basic function module 2 is IN2, and the input of basic function module 3 is IN3, the output of basic function module 1,2,3 as basic function module 4 input, basic function module 4 is output as OUT1.The execution cycle of above-mentioned simple logic is the cycle set by the parameter LevelM for performing recurrent pulse generation module, and the execution cycle if necessary to change logic can be realized by the cycle set by the M values for changing basic function module or the parameter LevelM for passing through change execution recurrent pulse generation module.Basic function module 5,6,7 is single-input single-output module, and basic function module 8 is the single output module of 3 inputs；Basic function module 5,6,7,8 with perform recurrent pulse generation module output execution cycle indicator position Sample_plus (I) be parameter, I≤N, the execution cycle of these basic functional blocks is the cycle set by the parameter LevelI for performing recurrent pulse generation module.The input of basic function module 5 is IN5, and the input of basic function module 6 is IN6, and the input of basic function module 7 is IN7, the output of basic function module 5,6,7 as basic function module 8 input, basic function module 8 is output as OUT2.The execution cycle of above-mentioned simple logic is the cycle set by the parameter LevelI for performing recurrent pulse generation module, and the execution cycle if necessary to change logic can be realized by the cycle set by the I values for changing basic function module or the parameter LevelI for passing through change execution recurrent pulse generation module.
Perform recurrent pulse generation module and include N number of execution cycle parameter, be output as the flag bit in N number of execution cycle；When time interval is equal to m-th performs the cycle, it is that a high level for PSCAD/EMTDC simulation step lengths is otherwise low level that m-th performs cycle indicator position and is width.As shown in Figure 2, perform settable five of recurrent pulse generation module and perform period L evel1, Level2, Level3, Level4, Level5, five execution cycles are set to 100 μ s, 200 μ s, 300 μ s, 400 μ s, 500 μ s, and each performs cycle arranges value and can adjust.Array Sample_plus (5) correspondences 5 flag bits in execution cycle of storage of one 5 dimension of output.Fig. 3 show the program flow diagram for performing recurrent pulse generation module, and Time is the current emulation moment；Time_old (5) deposits Sample_plus (5), and everybody is for the last time the moment of high level；Delt_time (5) is that current emulation moment and Sample_plus (5) are every for the last time for the difference between the high level moment is：Delt_time (M)=Time-Time_old (M), if Delt_time (M) be equal to Level (M) if Sample_plus (M)=1 and with current time update Time_old (M) value, otherwise Sample_plus (M)=0.
Basic function module is parameter to perform the execution cycle indicator position of recurrent pulse generation module output, once whether the flag bit is high level to the detection of each PSCAD/EMTDC simulation step length, if high level, then perform corresponding computing, otherwise enter next PSCAD/EMTDC emulation cycles, output result keeps constant.As shown in Figure 4, three-input adder module has three parameters of output end one of input one, three inputs are respectively IN1, IN2, IN3, and an output end is OUT, and parameter is execution cycle indicator position Sample_plus (M) for performing the output of recurrent pulse generation module.If Sample_plus (M)=1, OUT=IN1+IN2+IN3, otherwise output keeps constant.The execution cycle of above-mentioned three-input adder module is the cycle set by the parameter LevelM for performing recurrent pulse generation module, and the execution cycle if necessary to change logic can be realized by the cycle set by the M values for changing basic function module or the parameter LevelM for passing through change execution recurrent pulse generation module.
In sum, the above method builds the control relay protective scheme of simulation model using the basic function module that the execution cycle can be set, and each section of basic function module of logic can use the different execution cycles；The uniformity of simulation model and Practical Project can be improved, simulation result is relatively reliable, its analysis result can preferably instruct engineering reality；The execution cycle of basic function module, by execution recurrent pulse generation module United Dispatching, facilitates module to perform setting, modification and the management in cycle.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, on the premise of the technology of the present invention principle is not departed from; some improvement and deformation can also be made, these are improved and deformation also should be regarded as protection scope of the present invention.
Claims (3)
1. a kind of control protection simulation modeling method based on EMTDC, it is characterised in that：The basic function module that be can be set using the execution cycle builds the control relay protective scheme of simulation model, and each section of basic function module of logic can use the different execution cycles, and the execution cycle of basic function module is by execution recurrent pulse generation module United Dispatching；
The basic function module that the execution recurrent pulse generation module and execution cycle can be set is developed by PSCAD/EMTDC softwares custom feature, the execution recurrent pulse generation module, pulse signal is sent when time interval is equal to the set execution cycle；The basic function module, to perform the output of recurrent pulse generation module as parameter.
2. a kind of control protection simulation modeling method based on EMTDC according to claim 1, it is characterised in that：The execution recurrent pulse generation module includes N number of execution cycle parameter, is output as the flag bit in N number of execution cycle；When time interval is equal to m-th performs the cycle, it is that a high level for PSCAD/EMTDC simulation step lengths is otherwise low level that m-th performs cycle indicator position and is width；Wherein M≤N.
3. a kind of control protection simulation modeling method based on EMTDC according to claim 2, it is characterised in that：The basic function module is parameter to perform the execution cycle indicator position of recurrent pulse generation module output, once whether the flag bit is high level to the detection of each PSCAD/EMTDC simulation step length, if high level, then perform corresponding computing, otherwise enter next PSCAD/EMTDC emulation cycles, output result keeps constant.
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| CN108646587A (en) * | 2018-04-18 | 2018-10-12 | 许继电气股份有限公司 | A kind of EMTDC parallel simulation methods and system |
| CN110442435A (en) * | 2019-07-08 | 2019-11-12 | 国网江苏省电力有限公司 | Simulated program dispatching method and device based on PSCAD/EMTDC |
| CN111638655A (en) * | 2020-06-01 | 2020-09-08 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Periodic distribution method and system for compact direct current control protection device |
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| CN111638655B (en) * | 2020-06-01 | 2022-06-14 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Periodic distribution method and system for compact direct current control protection device |
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