JPH04236198A - Adaptive gain monitor for generator multivariable controller - Google Patents

Abstract

PURPOSE:To monitor a control gain to be calculated by adaptive gain calculating means for a generator multivariable controller in an on-line. CONSTITUTION:Before an adaptive gain calculated by adaptive gain calculating means for a generator multivariable controller is input to multivariable control means for the controller, whether the calculated gain is proper or not is decided, the gain decided not to be proper is eliminated, and not input to multivariable control means.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adaptive gain monitoring system for a generator multivariable control system. In detail, the adaptive gain calculation means of the generator multivariable control device monitors the control gain calculated online, and prevents the output of the generator multivariable control device from changing due to inappropriate gain, resulting in changes in the voltage and output of the generator. The present invention relates to an adaptive gain monitoring device for a generator multivariable control device that prevents oscillations from occurring.

0002

[Background Art] In this specification, a generator multivariable control device refers to a generator excitation control device and a turbine speed governor control device each having a one-variable feedback control system, whereas a generator and turbine A control device that takes various state variables (output, voltage, rotational speed, etc.) as input and optimally calculates two outputs for excitation control and speed control control.

[0003] In the above-mentioned one-variable feedback control system control device, the excitation control gain or the speed control control gain are each fixed, and are not necessarily optimal values for the respective state quantities of the generator and turbine. I couldn't. In pursuit of optimization of control, the single variable feedback control system has evolved into a generator multivariable control system. This generator multivariable control device detects the state quantities of the generator and turbine online, calculates multivariable control gains online from the state quantities, and uses these gains to perform excitation control and speed governing control. Execute. therefore,
A generator multivariable control device is a control device that can perform optimal control by controlling a generator or turbine with a control gain that is adapted to the respective state of the generator or turbine.

0004

[Problems to be Solved by the Invention] However, it is extremely difficult to completely eliminate noise from being superimposed on the detected generator state quantities and turbine state quantities, and in the generator multivariable control device according to the prior art, In the unlikely event that noise is superimposed, the gain calculated by the adaptive gain calculation means of the generator multivariable control device may become an unexpected value, and the control performed using this gain will be out of order, and as a result, The disadvantage is that undesirable fluctuations occur in the voltage and output of the generator.

An object of the present invention is to eliminate the above-mentioned drawbacks, and even if noise is accidentally superimposed on the detected generator state quantity or turbine state quantity, the output of the generator multivariable control device will not be disturbed. An object of the present invention is to provide an adaptive gain monitoring device for a generator multivariable control device, which prevents undesirable fluctuations from occurring in the voltage and output of the generator.

[0006]

[Means for Solving the Problems] The above object is to provide a system between an adaptive gain calculation means for calculating an adaptive gain of a generator multivariable control device and a multivariable control means of the generator multivariable control device. erroneous calculation absence confirmation means intervening to confirm that the adaptive gain calculation means does not output an erroneous calculation flag; and convergence confirmation means to confirm that the adaptive gain calculation means has converged; gain appropriate value confirmation means for confirming that the calculation result of the adaptive gain calculation means is less than or equal to the gain specified value; and a gain for checking that the sum of the gains of each variable calculated by the adaptive gain calculation means is not zero. The adaptive gain calculation is performed when outputs are output from all of the total sum checking means, the above-mentioned error calculation absence checking means, the above-mentioned convergence checking means, the above-mentioned gain appropriate value checking means, and the above-mentioned gain sum checking means. This is accomplished by an adaptive gain monitoring device for a generator multivariable control device comprising gain output switching means for outputting the output signal of the device to the multivariable control device.

[0007]

[Operation] In the adaptive gain monitoring device for a generator multivariable control device according to the present invention, the adaptive gain calculated by the adaptive gain calculation means of the generator multivariable control device is input to the multivariable control device of the generator multivariable control device. It is determined whether the calculated gain is appropriate or not before the gain is determined to be appropriate, and the gain determined to be inappropriate is excluded and not input to the multivariable control means. As a result, fluctuations in the voltage and power of the generator that would occur due to the use of an erroneously calculated control gain are prevented.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An adaptive gain monitoring device for a generator multivariable control device according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing the configuration of an adaptive gain monitoring device for a generator multivariable control device according to an embodiment of the present invention. In the figure, R is a generator multivariable control device, which includes adaptive gain calculation means R1 and multivariable control means R2. The above-mentioned adaptive gain calculation means R1 is a calculation means that detects state quantities (output, voltage, rotation speed, etc.) of the generator or turbine online, and calculates an adaptive multivariable control gain online from these state quantities, The multivariable control means R2 is a control means that outputs control commands for excitation control and speed control control using the gain calculated by the above-mentioned adaptive gain calculation means R1. Vs is a target value applying means for applying a target value (voltage target value) to the generator multivariable control means R2, and Vd is the generator multivariable control means R2.
2 is an output signal applying means for applying an output signal (corresponding to the output voltage) of the generator under test. Reference numeral I denotes a control signal applying means for applying a control signal outputted from the generator multivariable control means R2 to the generator under test. S is an adaptive gain monitoring device of a generator multivariable control device according to the present invention, which includes the above-mentioned adaptive gain calculation means R1 and multivariable control means R.
2, and each means S1 to S described below
Consists of 5. S1 is the above adaptive gain calculation means R1
This is a means for confirming the absence of erroneous calculations to confirm that no erroneous calculation flag is output. S2 is a convergence confirmation means for confirming that the adaptive gain calculation means R1 has converged after a predetermined number of calculations. S3
is a gain appropriate value confirmation means for confirming that the gain value calculated by the adaptive gain calculation means R1 is equal to or less than a gain regulation value. S4 is the above adaptive gain calculation means R
1 is a gain sum confirmation means for confirming that the sum of each variable calculated is not zero. S5 is each of the above means S1
-S4 is a gain output switching means for outputting the output signal of the above adaptive gain calculating means R1 to the above multivariable control means R2 when outputting from all of the above.

Next, the operation of the adaptive gain monitoring device for the generator multivariable control device according to the present invention will be explained. Various state variables of the generator and turbine (e.g. generator voltage V
- When the output P, etc.) is detected online and input to the adaptive gain calculation means R1, the adaptive gain calculation means R1 calculates a gain adapted to each of the above state variables online. This calculation result is not immediately input to the multivariable control means R2, but is first input to the adaptive gain monitoring device S of the generator multivariable control device according to the present invention. In this adaptive gain monitoring device S, each of the above-described means S1 to S4 determines whether the adaptive gain that is the result of the above calculation is appropriate or unfavorable based on each of the above-described functions. As a result, when all of the means S1 to S4 determine that they are appropriate and output, the gain output switching means S5 is turned on and the calculation result is input to the multivariable control means R2. Therefore, since the multivariable control means R2 performs control using only the gain determined to be appropriate, stable control is possible and fluctuations do not occur in the voltage or output of the generator.

[0011]

Effects of the Invention As explained above, the adaptive gain monitoring device for a generator multivariable control device according to the present invention is capable of controlling the adaptive gain calculation means of the generator multivariable control device and the multivariable control device for the generator multivariable control device. The adaptive gain calculation means is interposed between the erroneous calculation means and the erroneous calculation means to confirm that the adaptive gain calculation means does not output an erroneous calculation flag, and the convergence confirmation means is used to confirm that the adaptive gain calculation means converges, and the gain Confirm that the adaptive gain calculation result is less than the specified gain value using the appropriate number of value confirmations, confirm that the sum of the gains of each variable is not zero using the gain sum confirmation means, and output from all of the above confirmation means. Since the output gain output switching means is supposed to input the adaptive gain calculation results to the above-mentioned multivariable control means when Even if the gain becomes an inappropriate value, the gain will not be input from the adaptive gain calculation means to the multivariable control means, and the output of the generator multivariable control device will not be disturbed.

Therefore, the present invention provides an adaptive gain monitoring device for a generator multivariable control device that can prevent undesired fluctuations in the voltage and output of the generator due to noise superimposed on the detected amount. can do.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of an adaptive gain monitoring device for a generator multivariable control device according to an embodiment of the present invention.

[Explanation of symbols]

R Generator multivariable control device R1 Adaptive gain calculation means R2 Multivariable control means Vs Target value application means Vd Output signal application means I Control signal application means S Adaptive gain monitoring device S1　　　　　　　　　　　　　　　　　Method for confirming the absence of erroneous calculations) S2 Convergence confirmation means S3 Gain appropriate value confirmation means S4 Gain total confirmation means

Claims (1)

[Claims] 1. At least a generator multivariable control device, a target value applying means for applying a target value to the generator multivariable control device, and an output signal of the generator under test to the generator multivariable control device. and a control signal applying means for applying a control signal outputted by the generator multivariable control device to the generator under test. An erroneous calculation interposed between the adaptive gain calculation means to be calculated and the multivariable control means of the generator multivariable control device, and configured to confirm that the adaptive gain calculation means does not output an erroneous calculation flag. an absence confirmation means; a convergence confirmation means for confirming that the adaptive gain calculation means has converged; a gain appropriate value confirmation means for confirming that the calculation result of the adaptive gain calculation means is less than or equal to a gain specified value; gain sum checking means for checking that the sum of gains of each variable calculated by the adaptive gain calculation means is not zero; the absence of erroneous calculation checking means; the convergence checking means; the gain appropriate value checking means; and the gain sum checking means. and gain output switching means for outputting an output signal of the adaptive gain calculation means to the multivariable control means when the output signal is being output from all of the generator multivariable control devices. Gain monitoring device.