JPS6111000A - Digital type excitation controller of generator - Google Patents

Abstract

PURPOSE:To readily arbitrarily alter a target pattern of voltage/current by composing the blocks of a control system of software. CONSTITUTION:The AC output of an AC generator 1 is supplied through a rectifier 31 to a toroidal magnetic field coil 3 for nuclear fusion reactor. A microprocessor 20 programs the blocks of a current target pattern setting block 21, a voltage target pattern setting block 24, deviation detecting blocks 22, 25, 27, an error amplifying blocks 23, 26, contains them, and controls a field power source 11 in response to the detected outputs of DC current transformer 12, a DC transformer 13, a field current detector 14, and a field voltage detector 8. Thus, the voltage/current pattern can be readily altered.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a digital excitation control device for a generator that controls the voltage and current of a generator and a generator load in a fixed pattern.

[Prior art]

As an excitation control device for a generator, 1. Conventionally, there was a method shown in [No. 1]. In the figure, 1 is an alternating current generator, 2 is a field winding of this alternator, and 3 is a generator load. 4
is the δ1 transformer PT, which detects the output voltage of the alternator. 5 is an electrical installation block, and 6 is a deviation detection block. The deviation detection block 6 detects the deviation between the detected value of the PT 4 and the voltage setting value of the voltage setting button 5. This deviation is amplified by the error amplification block 7. F) is a field voltage detector, and the detected field voltage value and the output of the error amplifier block 7 are determined by the deviation detection block [1].
- The deviation between the field voltage value outputted by the addition block 9 and the output of the error amplification block 7 is input to the gate pulse generator 10 as a control signal. The gate pulse generator 10 converts the gate pulses corresponding to the above deviation C'J into the field power supply 1 using a thyrisk type rectifier.
Supply to 1.

In this excitation control device, when a deviation occurs between the output voltage of the alternator 1 and the voltage setting value, the ignition phase of the thyrisk type rectifier 11 is controlled, and the output voltage changes to the voltage setting value. The field current is controlled so that it is equal to .

Moreover, this excitation control device is also used when controlling the voltage and current of the generator load 3 to a constant target pattern, as shown in FIG.

In any case, in this conventional excitation control device, the voltage setting block 5 that constitutes this device is made up of hardware, so it is necessary to control the voltage and current of the generator and generator load to a certain target pattern. If there is a pattern, it is necessary to prepare a separate voltage setting block or current setting block each time the pattern is changed, and the hardware configuration is complicated when controlling multiple state variables of the load. There was a problem that it would become.

[Summary of the invention]

This invention was made in view of the above-mentioned conventional problems, and uses a microprocessor and programs functions such as a setting block for setting target patterns of voltage and current as described in 1. This is a digital excitation control device for generators that can easily change the target pattern of voltage and current as desired by storing it in a software configuration, and can handle a variety of 41 field controls with one device. This is a proposal.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3, the alternating current generator load 3 is a toroidal magnetic field coil for nuclear fusion, and DC power rectified by a diode rectifier 31 is supplied thereto. This rectifier 31 converts the AC output of the AC generator 1 into DC power. 1
2 is a DC current transformer DCCT for detecting the load DC current flowing through the toroidal magnetic field coil 3, 13 is a DC transformer DCPT for detecting the load DC voltage, and 14 is a field current detector for detecting the field current. It is. 20 is a microprocessor. Input point 121 of this microprocessor 20
．． 131.81.141 respectively DCCT 12
, DCPT13, field voltage detector 8, field current detector 1
The four detection outputs are combined. 100 is an output point and is connected to the gate pulse generator 10. The microprocessor 20 includes a current target pattern setting block (current setting block) 21 that generates a coil current target pattern shown in FIG. 4, a deviation detection block 22, and an error amplification block 2.
3. Voltage target pattern setting block (voltage setting block) that generates the coil voltage target pattern shown as B in Fig. 4
24, deviation detection block 25, error amplification block 26,
Each block, including a deviation detection block 27 and an error increase block 28, is stored in a programmed manner, and this control block performs control operations according to the program flowchart shown in FIG.

That is, this program converts the generator output voltage value detected by the PT4, the field voltage value detected by the field voltage detector 8, and the coil current value detected by the DCCT 12 into electric currents by A/D converting them. Input signal processing step, step of calculating the coil current target pattern value, step of calculating the current deviation between the above coil current value and the coil current target pattern value, I) Δ/D conversion of the signal of the coil voltage value detected by the CPT 13 A step of calculating the voltage deviation between the coil voltage value and the target coil voltage value, a step of adding the current deviation and the voltage deviation, and a step of detecting the voltage by the field voltage detector 8. It consists of a signal processing step of A/D converting and importing the field voltage, and a step of calculating an output value by correcting the added deviation value with the field voltage, and this output value is used as a control signal to generate a gate pulse. The signal is input to the device 1o.

In this way, the field current of the generator 1 is controlled, and the voltage and current supplied to the tro-idal magnetic field coil 3 are
It is controlled according to patterns A and B shown in the figure.

In this embodiment, since the current target pattern setting block 21 and the voltage target pattern setting block 24 are configured by software, arbitrary voltage target patterns and current target patterns can be obtained by simply changing the program.

In addition, the error amplification blocks 23, 26, 2, deviation detectors 25, 27, etc. are also configured with software, so the gain and time constant can be easily adjusted to the optimum level according to the load condition over a wide range. can.

〔Effect of the invention〕

As explained above, in this invention, by configuring each block of the control system with software, the target pattern of voltage and current can be changed arbitrarily without changing the hardware. Any control performance depending on the characteristics can be easily obtained.

[Brief explanation of drawings]

Figures 1 and 2 are block diagrams of a conventional excitation control device for a generator, Figure 3 is a block diagram showing an embodiment of the present invention, and Figure 4 is a coil current target pattern and coil voltage in the above embodiment. FIG. 5, which is a diagram showing the target pattern, is a flow chart of the control system program in the above embodiment. In the figure, J-generator 1, 2 field winding, 3 load, 4
-PT, 8-field voltage detector, 1o gate pulse generator, 11-field power supply, 12-DC current transformer, 13-DC transformer, 14-field current detector, 20-microprocessor, 21 Current target pattern setting block (current setting block), 22-deviation detection block, 23 error amplification block, 24 coil voltage target pattern setting block (voltage setting block), 25.27 deviation detection block, 26.28 error Amplification width block. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] It has an input point that takes in the detected values of the voltage and current of the generator or the generator load, and the detected values of the voltage and current of the generator field, and an output point that sends out the control signal, and has a voltage target value and a current target value. A setting block that calculates and sets a value, a deviation detection block that calculates the deviation between the set target value and the corresponding detected value, at least one deviation amplification block that calculates and amplifies the deviation, and corresponds to other detected values. A digital generator, characterized in that it has a microprocessor programmed and stored with a deviation detection block that detects a deviation from the deviation from the deviation, and a field power supply device that controls the generator field current in response to the control signal. type excitation control device.