CN110516275A - Simulation parameters check method based on disturbance information - Google Patents
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Abstract
The invention belongs to electric system simulation verification technique field more particularly to a kind of simulation parameters check methods based on disturbance information.Including establishing the simulation model of detailed synchronous generator, carrying out the initial value setting of parameter and establishing the electric system for emulation；Synchronous generator and external system are subjected to partial decoupling using measurement voltage data direct injection；The measured data and simulation result on the bus of synchronous generator boundary are compared, if error criterion meets electric system simulation precision, simulation parameters are effective, otherwise check to its model parameter；The model parameter that need to be checked is identified using trajectory-based trace sensitivity method；The accuracy of emulation after checking simulation parameters according to global error index verification.The present invention solves verifying electric system simulation system effectiveness, improves the accuracy of synchronous generator simulation parameters, analyzes prediction operation states of electric power system for dispatching of power netwoks personnel and provides foundation.
Description
Technical field
The invention belongs to electric system simulation verification technique field more particularly to a kind of simulation models based on disturbance information
Parameters validation method is the method for checking simulation parameters using actual measurement disturbance information.
Background technique
Digital Simulation is always the important tool of electric system research, planning, operation, so electric system simulation is credible
It spends the safety and economy of the system that will have a direct impact on.Generator is the important component of electric system, therefore its model
The inaccuracy of parameter can directly contribute simulation accuracy decline, and confidence level reduces, to influence the stable operation of electric system.
Currently, due to the shortage of measured data, researcher is generally by Universal Die when testing the parameter of synchronous generator
Type and conservative parameter are applied in emulation, but such model parameter does not ensure that its accuracy, can not improve emulation yet
Precision, correct guidance can not be provided for dispatcher.Moreover, synchronous generator and its control system include a variety of ginsengs
Number, the inaccuracy of different parameters is influenced to different extents the dynamic process of electric system, how in numerous parameters
Middle extraction simultaneously checks dominant parameters, and farthest improving simulation accuracy is problem to be solved.
Summary of the invention
For above-mentioned problems of the prior art, the simulation model ginseng based on disturbance information that the present invention provides a kind of
Number check method, in order to solve verifying electric system simulation system effectiveness, improve synchronous generator simulation model ginseng
Number accuracy.
In order to achieve the above-mentioned object of the invention, the present invention is achieved through the following technical solutions:
Simulation parameters check method based on disturbance information, comprising the following steps:
Step 1: establishing the simulation model of detailed synchronous generator, carry out the initial value setting of parameter and establish for imitating
Genuine electric system；
Step 2: synchronous generator and external system being subjected to partial decoupling using measurement voltage data direct injection；
Step 3: measured data and simulation result on comparison synchronous generator boundary bus, if error between the two refers to
Mark meets electric system simulation precision, then its simulation parameters is effective, otherwise checks to its model parameter；
Step 4: the model parameter that need to be checked is identified using trajectory-based trace sensitivity method；
Step 5: the accuracy of the emulation after checking simulation parameters according to the global error index verification of aforementioned proposition.
Synchronous generator and external system are subjected to piecemeal solution using measurement voltage data direct injection described in step 2
Coupling, strong coupling between power system component and cause the characteristic of external system will affect model parameter check as a result, being
Electric system carries out simulation modeling and brings difficulty, therefore using actual measurement disturbance voltage data as the perimeter strip of synchronous generator
Part decouples synchronous generator and external system, realizes that simulation model boundary busbar voltage is consistent in actual measurement, excludes external system
Interference to synchronous generator operation characteristic, it is last that hybrid dynamic simulation experiment is carried out according to the electric power system model built.
The measured data and simulation result on the bus of synchronous generator boundary are compared in the step 3, if between the two
Error criterion meets electric system simulation precision, then its simulation parameters is effective, otherwise checks to its model parameter, is
Refer to:
With global error index E come from the size of track error of quality appraisement on the whole, expression formula:
In formula: n is the number of samples of actual measurement track；yiFor the measured value of variable；yjFor the simulation numerical of variable；y0For
The steady state values of variable；
The value of error criterion more big error then between simulation result and measured data is smaller, if the value of error criterion
Smaller error then between simulation result and measured data is bigger.
The model parameter that need to be checked is identified in the step 4 using trajectory-based trace sensitivity method；Refer to when any
When one Parameters variation, the size of Electrical Power System Dynamic trail change is portrayed using trace sensitivity, i.e. track is influenced by parameter
Degree；Trace sensitivity is obtained by numerical analysis method, and the accuracy of the model that it is established and parameter is as a result depended on；
The sensitivity of parameter is ranked up using the convolution method based on trajectory calculation trace sensitivity, position is taken the first four place into sensitivity
Parameter is as check object；The mathematic(al) representation of trace sensitivity is the subordination principle of a variable coefficient, and principle is used
Formula (2) indicate, set objectives function using PSO Algorithm parameter to be checked exact value:
In formula: A (t) is a variable coefficient matrix；B (t) is the input of system；xaIt (t) is the output of system.
The standard of the emulation after simulation parameters is checked in the step 5 according to the global error index verification of aforementioned proposition
True property, model parameter is effective if simulation accuracy is met the requirements, if simulation accuracy is unsatisfactory for requiring to continue to check model parameter
Until meeting required precision.
The present invention has the following advantages and beneficial effects:
The present invention is a kind of method for checking synchronous generator simulation parameters using actual measurement disturbance information, is able to solve
Electric system simulation system effectiveness is verified, improves the accuracy of synchronous generator simulation parameters, methodological science is reasonable, only
The accuracy of synchronous generator model parameter multi can be verified and be improved using actual measurement noisy data, is analyzed for dispatching of power netwoks personnel
Predict that operation states of electric power system provides foundation.The method of the present invention is pre- for dispatching of power netwoks personnel analysis based entirely on measured data
It surveys operation states of electric power system and its stability provides reliable basis.
The present invention demonstrates the validity of synchronous machine simulation parameters, provides and obtains synchronous machine model with a high credibility
Parametric technique improves electric system simulation precision.
Detailed description of the invention
Understand for the ease of those of ordinary skill in the art and implement the present invention, with reference to the accompanying drawing and specific embodiment
The present invention is described in further detail, and the following examples are intended to illustrate the invention, it is to be understood that protection model of the invention
It encloses and is not limited by the specific implementation.
Fig. 1 is 2 district system figure of electric system of the present invention；
Fig. 2 is electric system partial decoupling schematic diagram of the present invention；
Fig. 3 is analogue system figure of the present invention；
Fig. 4 is the flow chart that the present invention checks synchronous generator model parameter multi using measured data.
Specific embodiment
The present invention is a kind of simulation parameters check method based on disturbance information, and check result is completely independent of
Simulation model, specifically includes the following steps:
Step 1: establishing the simulation model of detailed synchronous generator, carry out the initial value setting of parameter and establish for imitating
Genuine electric system.
Step 2: synchronous generator and external system being subjected to partial decoupling using measurement voltage data direct injection.Electricity
Strong coupling between Force system element and cause the characteristic of external system will affect model parameter check as a result, this is electric power
System carries out simulation modeling and brings difficulty, since the voltage data of PMU is that direct measurement obtains, and it is true to be able to reflect system
Real voltage dynamic process, and power is that the voltage that throughput measures calculates indirectly with electric current, it is unnecessary to introduce
Error, therefore the present invention using actual measurement disturbance voltage data as the boundary condition of synchronous generator by synchronous generator with outside
Portion's system decoupling realizes simulation model boundary busbar voltage in surveying unanimously, eliminates external system and transport to synchronous generator
The interference of row characteristic, it is last that hybrid dynamic simulation experiment is carried out according to the electric power system model built.
Step 3: measured data and simulation result on comparison synchronous generator boundary bus, if error between the two refers to
Mark meets electric system simulation precision, then illustrates that its simulation parameters is effective, otherwise need to check its model parameter.
The present invention is with global error index E come from the size of track error of quality appraisement on the whole, expression formula such as formula (1).
In formula: n is the number of samples of actual measurement track；yiFor the measured value of variable；yjFor the simulation numerical of variable；y0For
The steady state values of variable.
The bigger error illustrated between simulation result and measured data of the value of error criterion is smaller, if error criterion takes
It is bigger to be worth the smaller error illustrated between simulation result and measured data.
Step 4: the model parameter that need to be checked is identified using trajectory-based trace sensitivity method.When any one parameter becomes
When change, the size that trace sensitivity portrays Electrical Power System Dynamic trail change can use, i.e., track is by parameter effect.
Trace sensitivity be usually obtained by numerical analysis method, but its result depend on it establishes model and parameter it is accurate
Property.The present invention is ranked up the sensitivity of parameter using the convolution method based on trajectory calculation trace sensitivity, and sensitivity is arranged
Four parameters are as check object before name.The mathematic(al) representation of trace sensitivity is the differential algebraic equations of a variable coefficient
Group, principle can be indicated with formula (2).Set objectives function using PSO Algorithm parameter to be checked exact value.
In formula: A (t) is a variable coefficient matrix；B (t) is the input of system；xaIt (t) is the output of system.
Step 5: the accuracy of the emulation after checking simulation parameters according to the global error index verification proposed before,
Illustrate that model parameter is effective if simulation accuracy is met the requirements, if simulation accuracy is unsatisfactory for requiring to need to continue to check model ginseng
Number is until meet required precision.
Embodiment 1:
1st: by taking certain power plant as an example, measured data being pre-processed first, extracts the reality on power plant outlet bus
Voltage data is surveyed, then injects analogue system for the phase angle of measurement voltage and voltage as the boundary condition of simulation model, so that
Synchronous generator is decoupled as research object and external system, and guarantees that the voltage results of simulation data and actual measurement are consistent, such as Fig. 1
With shown in Fig. 2.Analogue system structure shown in Fig. 3 is established, wherein for impedance value close to zero, boundary voltage is actual synchronization phase
The data that measuring device measurement obtains.
2nd: based on the synchro generator model having built up, it is mixed that electric system being carried out to the analogue system after partial decoupling
Close dynamic simulation.Compare synchronous generator outlet bus at simulation result and measured data, including on bus voltage,
The active power and reactive power that phase angle, the synchronous generator of voltage issue.The error criterion of convolution (1) evaluates model ginseng
Several error sizes.
3rd: in the biggish situation of error obtained in the previous step, being carried out based on parameter of the trace sensitivity to Wind turbines
Sequence, takes the biggish parameter of sensitivity such as: synchronous q axis reactance, rotor inertia time constant, series connection pid time constant and amplification
Link coefficient is to check object.Definition can reflect the objective function of simulation track Yu actual measurement track error size on the whole, use
Particle swarm algorithm is sought so that objective function gets the parameter of minimum value as check result.The expression formula of objective function are as follows:
F (x)=(Y-y)T×(Y-y)(3)
In formula: x is parameter to be checked；Y is the reality output amount of system；Y is the output quantity of analogue system.
4th: using the model parameter after checking to carry out hybrid dynamic simulation again, compare measured data and imitate
The error of true result, calculates error criterion numerical values recited, it is compared with the error criterion numerical value before check, if error refers to
The increase of target numerical value illustrates to check effectively, otherwise in vain.Whether the error amount after verifying is checked meets the requirements, if meeting the requirements,
Illustrate that the model parameter meets simulation accuracy, otherwise needs to be back to previous step and continue model parameter check, until meeting
Until simulation accuracy, as shown in Figure 4.Check result is as follows:
1 Generator Parameters check result of table
| Parameter name | Xq | Tq″0 | T3 | Ka |
| Before check | 2.430 | 0.067 | 0.1 | 1 |
| After check | 1.214 | 0.093 | 0.15 | 1.056 |
Wherein: XqFor synchronous q axis reactance；Tq″0For rotor inertia time constant；T3For pid time constant of connecting；KaTo put
Big link coefficient.
By being analyzed above it is found that the synchronous generator model parameter multi proposed by the present invention based on actual measurement disturbance information is checked
Method, not only solves the problem of existing multiple synchronization generator model parameter inaccuracy, and it is imitative to provide electric system
The method really verified.This method calculates simply, meets electric system real measured data, and physical meaning is clear, and required model is simple, ginseng
Number is less, and simulation accuracy is high, grasps convenient for engineers and technicians.
The above specific embodiment is merely illustrative of the technical solution of the present invention, rather than its limitations, fields it is general
Lead to it is to be understood by the skilled artisans that any type of modification, equivalent variations are in right of the present invention referring to made by above-described embodiment
Within the scope of claimed.
Claims (5)
1. the simulation parameters check method based on disturbance information, it is characterized in that: the following steps are included:
Step 1: establishing the simulation model of detailed synchronous generator, carry out the initial value setting of parameter and establish for emulation
Electric system；
Step 2: synchronous generator and external system being subjected to partial decoupling using measurement voltage data direct injection；
Step 3: measured data and simulation result on comparison synchronous generator boundary bus, if error criterion between the two is full
Sufficient electric system simulation precision, then its simulation parameters is effective, otherwise checks to its model parameter；
Step 4: the model parameter that need to be checked is identified using trajectory-based trace sensitivity method；
Step 5: the accuracy of the emulation after checking simulation parameters according to the global error index verification of aforementioned proposition.
2. the simulation parameters check method according to claim 1 based on disturbance information, it is characterized in that: in step 2
It is described that synchronous generator and external system are subjected to partial decoupling, power system component using measurement voltage data direct injection
Between it is strong coupling and cause the characteristic of external system will affect model parameter check as a result, being emulated for electric system
Modeling brings difficulty, thus using actual measurement disturbance voltage data as the boundary condition of synchronous generator by synchronous generator and
External system decoupling realizes that simulation model boundary busbar voltage is consistent in actual measurement, excludes external system and runs to synchronous generator
The interference of characteristic, it is last that hybrid dynamic simulation experiment is carried out according to the electric power system model built.
3. the simulation parameters check method according to claim 1 based on disturbance information, it is characterized in that: the step
The measured data and simulation result on the bus of synchronous generator boundary are compared in 3, if error criterion between the two meets electric power
Simulation accuracy, then its simulation parameters is effective, otherwise checks, refers to its model parameter:
With global error index E come from the size of track error of quality appraisement on the whole, expression formula:
In formula: n is the number of samples of actual measurement track；yiFor the measured value of variable；yjFor the simulation numerical of variable；y0For variable
Steady state values；
The value of error criterion more big error then between simulation result and measured data is smaller, if the value of error criterion is smaller
Error then between simulation result and measured data is bigger.
4. the simulation parameters check method according to claim 1 based on disturbance information, it is characterized in that: the step
The model parameter that need to be checked is identified in 4 using trajectory-based trace sensitivity method；Refer to when any one Parameters variation, benefit
The size of Electrical Power System Dynamic trail change is portrayed with trace sensitivity, i.e., track is by parameter effect；Trace sensitivity
It is to be obtained by numerical analysis method, as a result depends on the accuracy of the model that it is established and parameter；Using based on trajectory calculation
The convolution method of trace sensitivity is ranked up the sensitivity of parameter, and sensitivity is taken the first four place the parameter of position as check pair
As；The mathematic(al) representation of trace sensitivity is the subordination principle of a variable coefficient, and principle is indicated with formula (2), is set up
Objective function using PSO Algorithm parameter to be checked exact value:
In formula: A (t) is a variable coefficient matrix；B (t) is the input of system；xaIt (t) is the output of system.
5. the simulation parameters check method according to claim 1 based on disturbance information, it is characterized in that: the step
The accuracy for checking the emulation after simulation parameters in 5 according to the global error index verification of aforementioned proposition, if simulation accuracy
It is effective to meet the requirements then model parameter, continues check model parameter if simulation accuracy is unsatisfactory for requiring and is wanted until meeting precision
It asks.
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| CN112821440A (en) * | 2020-12-31 | 2021-05-18 | 东南大学 | Parameter measuring and distinguishing method of direct current transmission system simulation model |
| CN113408070A (en) * | 2021-06-22 | 2021-09-17 | 南方科技大学 | Method, device and equipment for determining engine parameters and storage medium |
| CN115422851A (en) * | 2022-11-04 | 2022-12-02 | 南方电网数字电网研究院有限公司 | Power system component model calibration method, device, equipment and storage medium |
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| CN113408070B (en) * | 2021-06-22 | 2023-09-26 | 南方科技大学 | Engine parameter determining method, device, equipment and storage medium |
| CN115422851A (en) * | 2022-11-04 | 2022-12-02 | 南方电网数字电网研究院有限公司 | Power system component model calibration method, device, equipment and storage medium |
| WO2024114070A1 (en) * | 2022-11-30 | 2024-06-06 | 云南电网有限责任公司 | Method for determining simulation parameters of electrolytic aluminum electrolysis cell |
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Application publication date: 20191129 |