CN109858070B - Hybrid simulation model and method of Bergeron equivalent line containing frequency division impedance - Google Patents
Hybrid simulation model and method of Bergeron equivalent line containing frequency division impedance Download PDFInfo
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- CN109858070B CN109858070B CN201811481119.XA CN201811481119A CN109858070B CN 109858070 B CN109858070 B CN 109858070B CN 201811481119 A CN201811481119 A CN 201811481119A CN 109858070 B CN109858070 B CN 109858070B
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Abstract
The invention relates to a power electronic equipment simulation technology, in particular to a hybrid simulation model and method of a Bergeron equivalent line containing frequency division impedance. The hybrid simulation model comprises an electromechanical system model, an electromagnetic system model and a hybrid simulation interface model of the Bergeron equivalent line containing frequency division impedance. The method is realized by utilizing a real-time simulator RTLAB, the upper computer software of the real-time simulator RTLAB comprises an electromechanical system simulation software package ePHASOm and an electromagnetic system simulation software package eMAGAsim, electromechanical system models and electromagnetic system models are respectively built through the simulation software packages, and meanwhile, an electromechanical system interface program and an electromagnetic system interface program are designed by utilizing an application program interface carried by software, so that the self-defined development of time sequence control and data conversion is carried out. The hybrid simulation interface model of the Bergeron equivalent line containing the frequency division impedance realizes electromechanical-electromagnetic hybrid simulation, reflects the influence of the high-frequency component of an electromagnetic system on the electromechanical system by utilizing the frequency division impedance, and further improves the precision of the hybrid simulation.
Description
Technical Field
The invention belongs to the technical field of power electronic equipment simulation, and particularly relates to a hybrid simulation model and method of a Bergeron equivalent line containing frequency division impedance.
Background
With the continuous investment of a large number of new power electronic devices, the dynamic characteristics of power systems are becoming more and more complex. The dynamic response time of the power system to the voltage and frequency changes can be from several microseconds, several milliseconds to several minutes, even several hours, so that the simulation of the dynamic process with the large time domain range is difficult to complete at one time, the concerned dynamic process is usually simulated in detail according to the simulation requirement, and other processes are approximately simplified.
In a traditional electric power system analysis tool, digital simulation is respectively carried out on dynamic processes with different response times, and the digital simulation is mainly divided into an electromechanical system model and an electromagnetic system model. However, the electromagnetic transient process and the electromechanical transient process in the power system are interlaced, parallel and mutually influenced, so that a real-time interface is necessary to be performed on an electromechanical system model and an electromagnetic system model to build an electromechanical-electromagnetic hybrid simulation model.
Although the hybrid simulation interface model adopting the original Bergeron isoline avoids the calculation of system impedance, the hybrid simulation interface model cannot reflect the influence of the high-frequency component of an electromagnetic system on an electromechanical system.
Disclosure of Invention
The invention aims to provide a simulation model introducing frequency-division impedance on the basis of a hybrid simulation interface model of an original Bergeron equivalent line and a realization method.
In order to achieve the purpose, the invention adopts the technical scheme that: a mixed simulation model of a Bergeron equivalent line containing frequency division impedance comprises an electromechanical system model, an electromagnetic system model and a mixed simulation interface model of the Bergeron equivalent line containing frequency division impedance;
the electromechanical system model is a partial model which artificially partitions a simulation object according to simulation requirements and analyzes and solves an electromechanical transient process by using electromechanical simulation software;
the electromagnetic system model is a partial model which artificially separates a simulation object according to simulation requirements and analyzes and solves an electromagnetic transient process by utilizing electromagnetic simulation software;
the hybrid simulation interface model of the Bergeron equivalent line containing the frequency division impedance comprises a hybrid simulation interface model based on the Bergeron equivalent line and a broadband equivalent module; the hybrid simulation interface model based on the Bergeron isoline comprises line equivalent impedance and a historical current source, and the broadband isoline module is FDNE introducing frequency-dependent impedance at the electromagnetic system side and is used for reflecting the influence of high-frequency components of the electromagnetic system on an electromechanical system.
A method for realizing a hybrid simulation interface of a Bergeron equivalent line containing frequency division impedance by utilizing a real-time simulator RTLAB is characterized in that upper computer software of the real-time simulator RTLAB comprises an electromechanical system simulation software package ePHASsim and an electromagnetic system simulation software package eMAGAsim, electromechanical system models and electromagnetic system models are respectively built through the simulation software packages, and meanwhile, an electromechanical system interface program and an electromagnetic system interface program are designed by utilizing an application program interface carried by software, so that the self-defined development of time sequence control and data conversion is carried out; the method comprises the following specific steps:
step 2, performing clock synchronization on the electromechanical system and the electromagnetic system, and initializing the system, wherein t is 0;
step 3, the electromechanical system and the electromagnetic system respectively carry out simulation calculation until the moment t reaches the interaction moment, namely the calculation time point of the electromechanical system;
step 4, the electromechanical system and the electromagnetic system send the local side equivalent parameters to the pipeline;
step 5, the electromechanical system and the electromagnetic system respectively read opposite side equivalent parameters from the pipeline; if the total simulation time is reached, ending the simulation, otherwise, circulating the step 3 to the step 5.
The invention has the beneficial effects that: the hybrid simulation interface model of the Bergeron equivalent line containing the frequency-division impedance realizes electromechanical-electromagnetic hybrid simulation, reflects the influence of the high-frequency component of the electromagnetic system on the electromechanical system by using the frequency-division impedance, and further improves the precision of the hybrid simulation.
Drawings
Fig. 1 is an equivalent architecture diagram of a hybrid simulation interface of a bergeron equivalent line with frequency-division impedance according to an embodiment of the present invention;
fig. 2 is a detailed structure diagram of a hybrid simulation interface of a bergeron isoline with a frequency-dividing impedance according to an embodiment of the present invention;
fig. 3 is a flow chart of an implementation of a hybrid simulation interface of a bergeron isoline with a frequency-dividing impedance according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Although the hybrid simulation interface model of the original bergeron equivalent line is adopted, the calculation of system impedance is avoided, but the influence of a high-frequency component of an electromagnetic system on an electromechanical system cannot be reflected.
The embodiment is realized by the following technical scheme that the hybrid simulation model of the Bergeron equivalent line containing the frequency-division impedance comprises an electromechanical system model, an electromagnetic system model and a hybrid simulation interface model of the Bergeron equivalent line containing the frequency-division impedance.
The electromechanical system model refers to a partial model which artificially separates a simulation object according to simulation requirements and analyzes and solves an electromechanical transient process by using electromechanical simulation software.
The electromagnetic system model refers to a partial model which artificially separates a simulation object according to simulation requirements and analyzes and solves an electromagnetic transient process by utilizing electromagnetic simulation software.
The hybrid simulation interface model of the Bergeron equivalent line with the frequency-dividing impedance comprises a hybrid simulation interface model based on the Bergeron equivalent line and a broadband equivalent module. A hybrid simulation interface model based on the Bergeron equivalent line is composed of line equivalent impedance and a historical current source. The broadband equivalent module refers to FDNE introducing frequency-dependent impedance in the electromagnetic system side, and reflects the influence of high-frequency components of the electromagnetic system on an electromechanical system.
As shown in fig. 1, the equivalent architecture diagram of the hybrid simulation interface of the bergeron equivalent line with frequency-division impedance in this embodiment is shown, the left block diagram represents an electromechanical system, and the right block diagram represents an electromagnetic system. The electromechanical system and the electromagnetic system are connected with each other through a hybrid simulation interface of a Bergeron equivalent line containing frequency division impedance. The Bergeron equivalent line hybrid simulation interface model containing the frequency division impedance is composed of a broadband equivalent module FDNE and a Bergeron equivalent line-based hybrid simulation interface model, and the Bergeron equivalent line-based hybrid simulation interface model is built by line equivalent impedance and a historical current source.
Fig. 2 is a detailed structure diagram of a hybrid simulation interface of a bergeron equivalent line with a frequency-division impedance according to this embodiment. The data form of the electromechanical system is a fundamental wave vector value, and the data form of the electromagnetic system is an instantaneous value, so that data conversion needs to be carried out through an electromechanical system and an electromagnetic system interface program when equivalent information interaction is carried out. Meanwhile, the time sequence control can be carried out in the interface program according to the actual requirement.
Fig. 3 is a flow chart of an implementation of the hybrid simulation interface of the bergeron isoline with the frequency-dividing impedance according to this embodiment.
In specific implementation, a method for realizing a hybrid simulation interface of a Bergeron equivalent line containing frequency division impedance by using a real-time simulator RTLAB. The upper computer software of the real-time simulator RTLAB comprises an electromechanical system simulation software package ePHASORsim and an electromagnetic system simulation software package eMAGGAsim. The software package can be used for respectively building electromechanical system models and electromagnetic system models, and meanwhile, application program interfaces of the software are used for designing electromechanical system interface programs and electromagnetic system interface programs, so that the self-defined development of functions such as time sequence control and data conversion is carried out.
The specific implementation steps are as follows:
step one, simultaneously starting an electromechanical system simulation software ePHASORsim and an electromagnetic system simulation software eMAGAsim, wherein the simulation step length of the electromechanical system is delta T, and the simulation step length of the electromagnetic system is delta T;
step two, performing clock synchronization on the electromechanical system and the electromagnetic system, and initializing the system, wherein t is 0;
step three, the electromechanical system and the electromagnetic system respectively carry out simulation calculation until the moment t reaches the interaction moment, namely the calculation time point of the electromechanical system;
step four, the electromechanical system and the electromagnetic system send the local side equivalent parameters to the pipeline;
and step five, reading the equivalent parameters of the opposite side from the pipeline by the electromechanical system machine and the electromagnetic system respectively. If the total simulation time is reached, ending the simulation, otherwise, circulating the steps from three to five.
It should be understood that parts of the specification not set forth in detail are well within the prior art.
Although specific embodiments of the present invention have been described above with reference to the accompanying drawings, it will be appreciated by those skilled in the art that these are merely illustrative and that various changes or modifications may be made to these embodiments without departing from the principles and spirit of the invention. The scope of the invention is only limited by the appended claims.
Claims (2)
1. A mixed simulation model of a Bergeron equivalent line containing frequency-division impedance is characterized by comprising an electromechanical system model, an electromagnetic system model and a mixed simulation interface model of the Bergeron equivalent line containing frequency-division impedance;
the electromechanical system model is a partial model which artificially partitions a simulation object according to simulation requirements and analyzes and solves an electromechanical transient process by using electromechanical simulation software;
the electromagnetic system model is a partial model which artificially separates a simulation object according to simulation requirements and analyzes and solves an electromagnetic transient process by utilizing electromagnetic simulation software;
the hybrid simulation interface model of the Bergeron equivalent line containing the frequency division impedance comprises a hybrid simulation interface model based on the Bergeron equivalent line and a broadband equivalent module; the hybrid simulation interface model based on the Bergeron equivalent line comprises line equivalent impedance and a historical current source, and the broadband equivalent module is FDNE introducing frequency-dependent impedance at the electromagnetic system side and is used for reflecting the influence of high-frequency components of the electromagnetic system on an electromechanical system.
2. A method for realizing a hybrid simulation interface of a Bergeron equivalent line containing frequency division impedance by utilizing a real-time simulator RTLAB is characterized in that upper computer software of the real-time simulator RTLAB comprises an electromechanical system simulation software package ePHASsim and an electromagnetic system simulation software package eMAGAsim, electromechanical system models and electromagnetic system models are respectively built through the simulation software packages, and meanwhile, an electromechanical system interface program and an electromagnetic system interface program are designed by utilizing an application program interface carried by software, so that the self-defined development of time sequence control and data conversion is carried out; the method comprises the following specific steps:
step 1, simultaneously starting an electromechanical system simulation software ePHASORsim and an electromagnetic system simulation software eMAGAsim, wherein the simulation step length of the electromechanical system is delta T, and the simulation step length of the electromagnetic system is delta T;
step 2, performing clock synchronization on the electromechanical system and the electromagnetic system, and initializing the system, wherein t is 0;
step 3, the electromechanical system and the electromagnetic system respectively carry out simulation calculation until the moment t reaches the interaction moment, namely the calculation time point of the electromechanical system;
step 4, the electromechanical system and the electromagnetic system send the local side equivalent parameters to the pipeline;
step 5, the electromechanical system and the electromagnetic system respectively read opposite side equivalent parameters from the pipeline; if the total simulation time is reached, ending the simulation, otherwise, circulating the step 3 to the step 5.
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