CN101866383B - Electromechanical/electromagnetic transient state simulation data conversion system of power system and design method thereof - Google Patents
Electromechanical/electromagnetic transient state simulation data conversion system of power system and design method thereof Download PDFInfo
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Abstract
The invention relates to an electromechanical/electromagnetic transient state simulation data conversion system of a power system and a design method thereof. The conversion system comprises a top-layer module, six second-grade modules and nineteen third-grade modules. The top-layer module is a PSS/E-EMTP data conversion module, the second-grade module comprises a PSS/E network data inputting module, a generator data conversion module, a transformer data conversion module, a branch data conversion module, a load data conversion module and an EMTP data format outputting module, and the third-grade module comprises a read-in PSS/E data file module, an output PSS/E data file module and the like. The invention provides a design method of electromechanical/electromagnetic transient state simulation conversion system of the power system based on the PSS/E and the EMTP software, aiming to the respectively independent condition between of the electromechanical transient state simulation and the electromagnetic transient state simulation in the traditional power system and from the requirement of the electromechanical transient state/electromagnetic transient state conversion simulation of the power system. Actually, the data conversion result of the Shanghai power system shows that the system can accurately realize the successful conversion from the electromechanical transient state simulation to the electromagnetic transient state simulation in the power system.
Description
Technical field
The present invention relates to a kind of electric system electromechanical/electromagnetic transient state emulation converting system, especially a kind of electric system electromechanical/electromagnetic transient state emulation converting system method for designing based on PSS/E and EMTP software.
Background technology
Electric system simulation is to simulate a kind of research method of side circuit through setting up the appropriate mathematical model; Electromechanical transient simulation is meant the simultaneous solution electric system algebraic equation and the differential equation under certain initial condition; To obtain the time solution of physical quantity; Promptly discrete time series is progressively obtained corresponding system state vector value, PSS/E is typical electric system electromechanical transient simulation software, and its biggest advantage is that it can be used for ultra-large system emulation; Limitation is that its simulation accuracy is not high, can't be used for the fast transient analysis of phenomenons such as superpotential fault analysis, ground connection; The principle of operation of electromagnetic transient simulation be the trapezoidal rule with synthesization solve the time the differential equation in the boundary domain system composition; EMTP is a typical electromagnetic transient in power system simulation software, and it has extraordinary degree of accuracy in the fast transient analysis of phenomenons such as superpotential fault analysis, ground connection.For realizing the fast transient analysis of phenomenons such as the local superpotential fault analysis under big electrical network, ground connection in the electric system, need a kind of electric system electromechanical transient/electro-magnetic transient conversion emulation converting system.
Summary of the invention
The present invention will provide a kind of electric system electromechanical/electromagnetic transient state emulation converting system and method for designing thereof based on PSS/E and EMTP software, and this system and design method can accurately be realized the successful conversion of electric system electromechanical transient simulation to electromagnetic transient simulation.
For realizing above-mentioned purpose; Technical scheme of the present invention is: a kind of electric system electromechanical/electromagnetic transient state emulation converting system; Comprise a top-level module; Six secondary modules and nineteen 3-level module; Be characterized in: top-level module is the PSS/E-EMTP data conversion module, and the secondary module comprises the input of PSS/E network data, generator data-switching, transformer data-switching, branch road data-switching, load data conversion, EMTP data layout output module, and 3-level module comprises and reads in, exports PSS/E data file module;
PSS/E network data load module: be used for reading the data and the * dyr generator data of * raw file, and be sent to the PSS/E-EMTP data conversion module and accept the PSS/E data file;
Generator data conversion module: be used to read generator bus node, generator Temporal Data; Input generator auxiliary data; Calculating generator voltage, angle; Form generator EMTP data, generator EMTP data are sent to the PSS/E-EMTP data conversion module and accept generator PSS/E data;
Transformer data conversion module: be used to read each side gusset of transformer number, each winding impedance of calculating transformer and each side voltage; Form transformer EMTP data, transformer EMTP data are sent to the PSS/E-EMTP data conversion module and accept transformer PSS/E data;
Branch road data conversion module: be used to read each branch node number, calculate branch impedance, form branch road EMTP data, branch road EMTP data are sent to the PSS/E-EMTP data conversion module and accept branch road PSS/E data;
The load data modular converter: be used to read a load bus number, calculated load size, form load EMTP data, the EMTP data of will load are sent to the PSS/E-EMTP data conversion module and accept the PSS/E data of loading;
EMTP data layout output module: be used to accept from the output of PSS/E-EMTP data conversion module-the EMTP data layout, form EMTP data file and output.
Realize the method for designing of above-mentioned electric system electromechanical/electromagnetic transient state emulation converting system, it is characterized in that concrete steps are:
(1) reads in electromechanical transient simulation PSS/E data file;
(2) identification and realization electromechanical transient data are to the conversion of electro-magnetic transient data layout;
(3) require output electro-magnetic transient data file according to the output emulated data;
(4) judge whether to carry out electromagnetic transient simulation;
(5) emulation finishes, and withdraws from dynamo-electric time-out/electro-magnetic transient data conversion system.
The invention has the beneficial effects as follows: the present invention is directed to present electric system electromechanical transient simulation and the relatively independent separately present situation of electromagnetic transient simulation; Demand from electric system electromechanical transient/electro-magnetic transient conversion emulation has proposed a kind of electric system electromechanical/electromagnetic transient state emulation converting system and method for designing thereof based on PSS/E and EMTP software.Actual Shanghai electric network data transformation result shows that this system can accurately realize the successful conversion of electric system electromechanical transient simulation to electromagnetic transient simulation.
Description of drawings
Fig. 1 is electro-magnetic transient, electromechanical transient and medium-term and long-term dynamic schematic diagram;
Wherein, S is a simulation type, and D is an electro-magnetic transient, and M is an electromechanical transient, and Z is dynamically medium-term and long-term
Fig. 2 is a PSS/E-EMTP data-switching principle assumption diagram;
Wherein: D11 is the PSS/E data file, and D12 is a network data; D21 is a generator PSS/E data file, and D22 is generator EMTP data; D31, D32 are transformer PSS/E data; D41 is branch road PSS/E data, and D42 is branch road EMTP data; D51, D52 are load PSS/E data; D61 is the EMTP data layout
Fig. 3 is an electric system electromechanical/electromagnetic transient state emulation converting system process flow diagram;
Fig. 4 is 2008 annual Shanghai Power Network subregion synoptic diagram.
Embodiment
Below in conjunction with surtax figure and embodiment the present invention is further described.
(1) electric system electromechanical transient simulation
The electric system electromechanical transient simulation is mainly studied electric system and is received transient stability and the steady stability performance that receives after the microvariations after the big disturbance.Wherein the transient stability simulation analysis is that the research electric system receives such as short trouble, and excision circuit, generator, load, generator lose under the big perturbation action such as excitation or impact load, the dynamic behaviour of electric system and the ability that keeps the synchronism stability operation.
The electric system electromechanical transient simulation needs simultaneous solution electric system differential equation group and Algebraic Equation set to obtain the time solution of physical quantity.The method for solving of algebraic equation mainly contains: carry out the Newton-Laphson method of iterative, based on Gauss's plug Dare method of admittance matrix form with based on the direct solution of sparse triangle decomposition.The method for solving of the differential equation can adopt explicit integration schemes or implicit expression integral method, and wherein the implicit expression trapezoidal integration is owing to better numerical value stability obtains increasing application.Can be divided into alternately solving method and simultaneous solution method in proper order according to finding the solution of the differential equation.
Under the electromechanical transient simulation pattern, adopt the effective value mode to calculate, grid is used based on the algebraic equation of complex impedance and is described.Therefore dynamo-electric pure first-harmonic model of system's formula under his simulation model.Simultaneously generator and other motor both can have been used completely under this simulation model, also can represent with the differential equation of depression of order.Owing to introduced symmetrical component method, the electromechanical transient simulation pattern also can be calculated unbalanced fault.This simulation model adopts algebraic equation descriptive system network, to the generally not restriction of described system size.Therefore, special formula is to the stable research of large-scale power system in actual engineering, and the electromechanical transient simulation program has obtained using widely like PSS/E.But, because these programs adopt pure first-harmonic model, certain limitation is arranged also in the use, particularly it can't handle the electric system nonlinear characteristic.
(2) electromagnetic transient in power system emulation
Electromagnetic transient in power system emulation must be considered the electro-magnetic transient characteristic of direct current and control system, distribution parameter characteristic and the frequency characteristic of parameter, the electromagnetism of generator and the nonlinear characteristic of electromechanical transient process and a series of elements of transmission line of electricity.Therefore the mathematical model of electromagnetic transient simulation must be set up algebraically or differential, the PDE of these elements.Electromagnetic transient simulation generally all is based on the Dommel algorithm, through with the implicit expression trapezoidal integration differential, the PDE of electric system being converted into difference equation.
Under the electromagnetic transient simulation pattern, system carries out complete description through algebraic equation, the differential equation and PDE, but systematic parameter phase-splitting input also can independently be revised.The electromagnetic transient simulation pattern adopts the instantaneous value mode to calculate; Can simulate the various elements of the complication system that also has HVDC and FACTS device accurately, like conventional thyristor, low frequency gate turn off thyristor (GTO) even the bipolar thyristor of high-frequency insulation grid (IGBT).Therefore, the electromagnetic transient simulation pattern can be analyzed the various transient state problems of AC and DC power system more exactly.But, because the electro-magnetic transient pattern is that to be based upon the differential equation be on the basis, it to find the solution speed slower.
(3) electric system electromechanical/electromagnetic transient state emulation converting system
The electric system time-domain-simulation can be divided into electromagnetic transient simulation, electromechanical transient simulation and medium-term and long-term emulation according to the dynamic process difference of being investigated, and Fig. 1 has provided electromagnetic transient in power system emulation, electromechanical transient simulation and medium-term and long-term dynamic simulation synoptic diagram.
As shown in Figure 2, the present invention has proposed a kind of electromechanical/electromagnetic transient state simulation data conversion system of power system based on PSS/E and EMTP software from the demand of electric system electromechanical transient/electro-magnetic transient conversion emulation.This data conversion system comprises that a top-level module comprises the PSS/E-EMTP data conversion module; The secondary module comprises the input of PSS/E network data, generator data-switching, transformer data-switching, branch road data-switching, load data conversion, EMTP data layout output module, and 3-level module comprises and reads in, exports PSS/E data file module.
PSS/E network data load module: be used for reading the data and the * dyr generator data of * raw file, and be sent to the PSS/E-EMTP data conversion module and accept the PSS/E data file;
Generator data conversion module: be used to read generator bus node, generator Temporal Data; Input generator auxiliary data; Calculating generator voltage, angle; Form generator EMTP data, generator EMTP data are sent to the PSS/E-EMTP data conversion module and accept generator PSS/E data;
Transformer data conversion module: be used to read each side gusset of transformer number, each winding impedance of calculating transformer and each side voltage; Form transformer EMTP data, transformer EMTP data are sent to the PSS/E-EMTP data conversion module and accept transformer PSS/E data;
Branch road data conversion module: be used to read each branch node number, calculate branch impedance, form branch road EMTP data, branch road EMTP data are sent to the PSS/E-EMTP data conversion module and accept branch road PSS/E data;
The load data modular converter: be used to read a load bus number, calculated load size, form load EMTP data, the EMTP data of will load are sent to the PSS/E-EMTP data conversion module and accept the PSS/E data of loading;
EMTP data layout output module: be used to accept from the output of PSS/E-EMTP data conversion module-the EMTP data layout, form EMTP data file and output.
As shown in Figure 3, the electric system electromechanical transient/electromagnetic transient state simulation data conversion system method for designing based on PSS/E and EMTP software comprises the steps:
(1) reads in electromechanical transient simulation data file (PSS/E)
(2) identification and realization electromechanical transient data are to the conversion of electro-magnetic transient data layout
(3) require output electro-magnetic transient data file according to the output emulated data
(4) judge whether to carry out electromagnetic transient simulation
(5) emulation finishes, and withdraws from dynamo-electric time-out/electro-magnetic transient data conversion system
Application example
The Shanghai Power Network data only have PSS/E and BPA form at present; For realizing the electromagnetic transient simulation of Shanghai Power Network; This paper utilizes the electric system electromechanical/electromagnetic transient state emulation converting system based on PSS/E and EMTP software of proposition, in actual Shanghai Power Network, has realized the successful conversion of electric system electromechanical transient simulation data layout to the electromagnetic transient state simulation data form.
1. Shanghai Power Network model
Shanghai Power Network is a core with 500kV transformer station, divides seven 220kV regional power grid independent operatings, is respectively: poplar goes, creeps, Huang Du, Si Jing, south bridge, poplar is high and turn round and look at the road subregion.System be 2008 the end of the year normal operating mode; With 2008 the end of the year network architecture be the basis, the 500kV electrical network adopts and to cross the anti-operation of nasal mucus string, scene 2 string one draws and stops (crossing the anti-operation of nasal mucus 5010/5108 line string; Fen bridge 5912 goes out string with Nan Yang 5106 at south bridge; Board cross 5903 with cross nasal mucus 5101 and go out string at Huang Du, draw and stop Xu yellow 5113 or Xu crosses 5114 arbitrary) the measure limiting short-circuit current, as shown in Figure 4.
2. simulation result comparative analysis before and after the electromechanical/electromagnetic transient state conversion
For the description of wherein component models and not quite identical, the inside of two softwares also is not quite similar for the solution of equation in the Shanghai Power Network simulation process for electromagnetic transient in power system emulation (EMTP) and electric system electromechanical transient simulation (PSS/E).This paper comparative analysis during Shanghai Power Network part 500KV website generation three-phase shortcircuit; Adopt before and after the electromechanical/electromagnetic transient state data conversion system conversion that proposes; EMTP electromagnetic transient simulation and PSS/E electromechanical transient simulation the short-circuit current situation, it is as shown in table 1 that EMTP and PSS/E transient emulation calculate the short-circuit current comparative analysis.
Short-circuit current data comparative analysis information slip before and after the table 1 electromechanical/electromagnetic transient state data-switching
| Short circuit website 500KV | Electromagnetic transient simulation (EMTP) | Electromechanical transient simulation (PSS/E) | Error rate |
| South bridge | 44.364 | 45.632 | 2.86％ |
| Poplar is high | 48.596 | 48.672 | 0.16％ |
| Gu Lu | 54.871 | 54.866 | 0.01％ |
| Outer two factories | 55.327 | 55.302 | 0.04％ |
| Outer three factories | 45.579 | 45.671 | 0.20％ |
| The poplar row | 57.124 | 56.983 | 0.25％ |
| Stone two factories | 43.256 | 43.402 | 0.34％ |
| Huang crosses | 47.341 | 45.194 | 4.45％ |
| Si Jing | 40.808 | 40.776 | 0.08％ |
| Creep | 55.901 | 55.770 | 0.23％ |
Find out by last table error between EMTP electromagnetic transient simulation result and PSS/E electromechanical transient simulation result's the short-circuit current fundamental component except that Huang Duzhan all in 1%; The big reason of the relative error of south bridge station and Huang Duzhan possibly be these 2 get in touch closely with outer net, with the equivalent point close together, add that have direct current to add at these 2.All in all; Simulation result showed after employing electromechanical/electromagnetic transient state emulation converting system was carried out data-switching; EMTP and PSS/E transient emulation calculate the short-circuit current result and have consistance preferably, and the dynamo-electric electromagnetic transient simulation converting system that this patent proposed has accuracy preferably.
3. conclusion
Electric system simulation is to set up model according to original electric system, utilizes model to calculate and tests, and research electric system work behavior characteristic at the appointed time, electric system simulation has just been brought into play important effect always in electric system since being born.This paper is accurate to present electric system electromechanical transient simulation and the relatively independent separately present situation of electromagnetic transient simulation; Demand from electric system electromechanical transient/electro-magnetic transient conversion emulation has proposed a kind of electric system electromechanical/electromagnetic transient state emulation converting system based on PSS/E and EMTP software.With actual Shanghai Power Network is example, and analysis result shows that this system can accurately realize the successful conversion of electric system electromechanical transient simulation to electromagnetic transient simulation.
Claims (2)
1. electric system electromechanical/electromagnetic transient state emulation converting system; Comprise a top-level module; Six secondary modules and nineteen 3-level module; It is characterized in that: said top-level module is the PSS/E-EMTP data conversion module, and the secondary module comprises the input of PSS/E network data, generator data-switching, transformer data-switching, branch road data-switching, load data conversion, EMTP data layout output module, and 3-level module comprises and reads in, exports PSS/E data file module;
Said PSS/E network data load module: be used for reading the data and the * dyr generator data of * raw file, and be sent to the PSS/E-EMTP data conversion module and accept the PSS/E data file;
Said generator data conversion module: be used to read generator bus node, generator Temporal Data; Input generator auxiliary data; Calculating generator voltage, angle; Form generator EMTP data, generator EMTP data are sent to the PSS/E-EMTP data conversion module and accept generator PSS/E data;
Said transformer data conversion module: be used to read each side gusset of transformer number, each winding impedance of calculating transformer and each side voltage; Form transformer EMTP data, transformer EMTP data are sent to the PSS/E-EMTP data conversion module and accept transformer PSS/E data;
Said branch road data conversion module: be used to read each branch node number, calculate branch impedance, form branch road EMTP data, branch road EMTP data are sent to the PSS/E-EMTP data conversion module and accept branch road PSS/E data;
Said load data modular converter: be used to read each load bus number, calculated load size, form load EMTP data, the EMTP data of will load are sent to the PSS/E-EMTP data conversion module and accept the PSS/E data of loading;
Said EMTP data layout output module: be used to accept EMTP data layout, form EMTP data file and output from the output of PSS/E-EMTP data conversion module.
2. method for designing that realizes electric system electromechanical/electromagnetic transient state emulation converting system as claimed in claim 1 is characterized in that concrete steps are:
(1) reads in electromechanical transient simulation PSS/E data file;
(2) identification and realization electromechanical transient data are to the conversion of electro-magnetic transient data layout;
(3) require output electro-magnetic transient data file according to the output emulated data;
(4) judge whether to carry out electromagnetic transient simulation;
(5) emulation finishes, and withdraws from electric system electromechanical/electromagnetic transient state emulation converting system.
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| CN102521343B (en) * | 2011-12-09 | 2013-05-15 | 山东大学 | Transformation method of input data of simulation software of power system |
| CN102682101B (en) * | 2012-04-28 | 2014-01-08 | 浙江大学 | Method for converting load flow input data of power system analysis software package (PSASP) of alternating current power system to load flow input data of power system simulator for engineering (PSS/E) of alternating current power system |
| CN102708258B (en) * | 2012-05-21 | 2014-04-23 | 浙江大学 | Method for converting data of power network system from PSS/E (power system analysis/emulation) to SimPowerSys |
| CN102945299B (en) * | 2012-10-26 | 2016-12-21 | 南方电网科学研究院有限责任公司 | Use the EMTDC simulation initialisation method of controlled source equivalent generator node |
| CN102999361B (en) * | 2012-11-27 | 2014-02-12 | 中国电力科学研究院 | Method for automatically updating electromagnetic transient data from electromechanical transient data |
| CN102999668B (en) * | 2012-11-27 | 2014-04-23 | 中国电力科学研究院 | Method for automatically converting electromagnetic transient data from electromechanical transient data |
| CN104462647A (en) * | 2014-11-04 | 2015-03-25 | 华南理工大学 | Modeling method for BPA and PSS/E data conversion universal model |
| CN105913337B (en) * | 2016-04-19 | 2019-07-26 | 国网重庆市电力公司电力科学研究院 | A kind of PSASP data model translation is the method for RSCAD data model |
| CN108846251A (en) * | 2018-09-13 | 2018-11-20 | 浙江大学 | A kind of Electrical-Machanical Transient Simulation of Power System system and method for self-adapting data format |
| CN110059346B (en) * | 2019-03-08 | 2022-06-03 | 广东工业大学 | Electromagnetic transient rapid simulation method of controllable series compensation device |
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| CN1278232C (en) * | 2003-09-28 | 2006-10-04 | 中国电力科学研究院 | Digital emulator of power system |
| CN101246505A (en) * | 2007-12-14 | 2008-08-20 | 南方电网技术研究中心 | Electric network electromagnet transient and electromechanical transient hybrid simulation system and simulation method thereof |
| CN101539963B (en) * | 2009-04-30 | 2011-02-02 | 华北电力大学 | Model conversion proposal from mechanical-electrical transient to electromagnetic transient and implementation method |
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