SU574848A1 - Device for monitoring redundant generator - Google Patents

Description

one

The invention relates to the field of pulsed and discrete technology and can be used in synchronization and control devices, when reserving by replacing generators of an in-phase frequency grid (obtained by dividing the frequency of the master oscillator with dividers with different division factors).

A device 1 for controlling a generator is known, which contains a converter, a shut-off valve, through which a backup generator is powered. A disadvantage of this device is the ability to control the frequency reduction.

It is also known a device 2 for controlling a generator, comprising integrators with threshold devices. The disadvantage of this device is the ability to control only increasing the frequency of the generator. Devices 1 and 2 also provide control only for the frequency of the single-output generator. The closest to the technical solution to the invention, the device 3 for monitoring a redundant generator contains the first element And, the output of which is connected to the input "Installation O of the pulse counter connected to the pulse generator. The disadvantage of such a device is the lack of detection and automatic switching to a reserve with non-malfunctions that cause an increase in the frequency of the operating oscillator.

The purpose of the invention is to increase the reliability of monitoring a redundant generator, in particular, detection of any malfunction of the common-mode grid generator (both the master oscillator and any frequency divider).

This is achieved in that the device for

The control of the redundant generator contains the AND, OR, and / 5-flip-flop elements, the 5-n / -inputs of which are connected respectively to the outputs of the first and second-to-last bits of the counter, the output of the first And element and the output

The 5 flip-flops are connected to the inputs of the second AND element, and the outputs of the second AND element and the last digit of the counter are connected to the inputs of the OR element.

Figure 1 shows the flowchart.

devices for monitoring a redundant generator.

It contains the first element AND I, the output buses of channels 2, 3, 4 in-phase frequencies of the redundant generator, counter 5, generator 6 pulses, jRS-trigger 7, second element AND 8, element OR 9, bus 10 controlling the reserve switching switch.

The inputs of the element And 1 are connected to channels 2, 3, 4 of the common-mode frequencies of the redundant generator. The output of element II 1 is connected to the input “Installation About counter 5, generator output 6 pulses — with counting input of counter 5. Input 5 is set to unit / 5-flip-flop 7 connected to the output of the first discharge of counter 5, input R is set to zero the state of the S-flip-flop 7 - to the output of the penultimate discharge of the counter 5. The output of the unit arm 7 of the 5-trnger is connected to the input of the element 8. And the second input of the element 8 and 8 is connected to the output of the element 1 1. The output of the element E 8 is connected to the input of the element OR 9, the second input of the element OR 9 - with the output of the last digit of the sche snip 5, and an output of OR 9 - 10 with the bus switch control the switching to standby.

The device works as follows.

During normal operation of the controlled generator to the inputs of the element And 1 receives common-mode signals from the output buses of channels 2, 3, 4 frequencies of the redundant generator. The signal from the output of the AND 1 element is removed, the frequency of which is equal to the lowest frequency of the signals applied to its inputs. The output signal of AND 1 zeroes the counter 5 pulses of the generator 6, while the frequency of the pulse generator and the number of bits of the counter are determined from the condition of the time position of the zero pulse between the transfer pulses of the penultimate and last bits of the counter during normal operation of the redundant generator.

The first discharge transfer bit counter 5 sets the one condition to 5 trigger 7, which is transferred to the zero state by the transfer signal of the last but one digit of the counter. The signal of the single arm 5 of the trigger 7 is fed to the input of the element And 8 and controls the passage of the signal from the output of the element AND 1 through the element AND 8. In normal operation of the redundant generator, the signal of the single arm / 5 flip-flop ends before the arrival of the signal from the output of the element AND 1, as a result what the signal at the output element And 8 is missing The element OR 9 combines the output of the last bit of the counter 5 and the output of the element AND 8.

Thus, during normal operation of the redundant generator, the signal at the output of the element OR 9, and the accession to the bus 10 of the control of the switch for switching to the reserve, is absent. In the event of faults, the drive w, nx increases the signal frequency, w arrives; it comes from the output of element I 1, for example, the divider divides the dividend twice, the transfer signal of the penultimate digit of counter 5 is absent, because the counter is reset earlier. RS trigger 7 is not set to the zero state, i.e. the signal of its single arm allows the signal from the output of the AND 1 element to pass through the AND 8 element to the input of the OR 9 element and further to the bus 10 controlling the reserve switching switch. In case of malfunctions that lead to a decrease in the signal frequency, the arrival of w; its output from element I 1, for example, doubling the division ratio by half, the output of the last discharge of counter 5 generates a transfer signal until a counter zero pulse appears, resulting in The transfer signal through element P1LI 9 enters the control switch spine 10 for switching to a reserve.

The use of the invention will improve the reliability of the system, since it is a consumer of an in-phase frequency grid (for example, an undetected increase in frequency leads to a failure of powerful devices operating at a certain duty cycle, distortions and loss of information, etc.), reduces time. troubleshooting the system.

Claims (3)

1. V. V. Klimov. On the issue of generator backup. “Radio Engineering N ° 5, 1967, p. 102 2. Authors certificate of the USSR Vg 2148251 cl. G 06F 11/00, 1975. 3. USSR author's certificate L341141, cl. N OZK 1/00, 1970.