Prime motor based on simplex method of nuclear power unit and method for identifying parameters of speed regulator of prime motor
A nuclear power unit and parameter identification technology, applied in the direction of electrical digital data processing, instruments, special data processing applications, etc., can solve the problems of not being able to obtain the analytical form of the objective function, slow convergence speed, and large amount of calculation
Active Publication Date: 2012-11-28
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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[0003] The least squares method is a classic and effective parameter identification method, but when the amount of measured data is large and the number of parameters to be identified is large, the amount of calculation will be very large
The steepest descent method and the conjugate gradient method are effective methods for univariate parameter identification, but both methods require the calculation of the gradient of the objective function, and in fact, the analytical form of the objective function is often not available in many optimization problems. In addition, The steepest descent method tends to converge very slowly near the optimal point. In order to obtain high optimization accuracy, it is often necessary to search many times near the optimal point.
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[0057] The method for identifying the prime mover of the nuclear power unit and the governor parameter thereof based on the simplex method of the present invention comprises the following steps:
[0058] S1 given α 0 ,λ,μ,ε,N,K,K 1 =0,
[0059] where: α 0 is a set of estimated values of parameters to be identified, μ is the expansion factor, μ is the compression factor, ε is the convergence criterion, N is equal to the number of parameters to be identified, and K is the maximum number of iterations;
[0060] S2 determines the initial simplex and calculates α i = α 0 +h*e i ,i=1,2,...n (2);
[0061] S3 objective function formula (1), calculate the average deviation corresponding to each group of parameters according to the objective function, and calculate C i =Q(α i )(i=1,2,...,N);
[0062] S4 find out α H ,α L ,α G ;
[0063] S5 iteration count plus 1, K 1 =K 1 +1;
[0064] S6 Judgment|C H -C L |L , if established, output successful α L , CL, end;
[006...
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The invention provides a prime motor based on a simplex method of a nuclear power unit, and a method for identifying parameters of a speed regulator of the prime motor. The prime motor is characterized in that as the simplex method is applied to the prime motor of the nuclear power unit and the parameter identification of the speed regulator of the prime motor, the calculation workload can be reduced, the convergence is rapid, and an analysis form of target functions can be obtained without the derivation of the target functions and other problems. According to the invention, the control parameters are rapidly optimized and converged, the calculation workload is small, the parameters of the prime motor of the actual nuclear power unit and the speed regulator can be effectively identified, and thus the prime motor has important engineering application values.
Description
technical field [0001] The invention relates to a method for identifying the parameters of a prime mover of a nuclear power unit and its governor, in particular to a method for identifying the parameters of a prime mover of a nuclear power unit and its governor based on the simplex method. Background technique [0002] The basic tool for analyzing the power system is digital simulation software. The mainstream power system analysis software supports the prime movers and governor models of various nuclear power units, but in terms of parameters, they are all "typical values" that have not been verified in practice. When studying the electromechanical transient stability, it may not bring much error. However, for the large power grid formed by the UHV power grid, the influence of the prime mover and its governor will gradually appear, so it is necessary to use the measured data Actual parameter values are identified instead of current "typical values". [0003] The least sq...
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Inventor谭金邓少翔金格蔡笋冯永新邓小文
OwnerGUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD