RU149325U1 - VOLTAGE TRANSFORMATION UNIT BPN 2 BASIC CABINET COMPLEX OF HIGHER RELIABILITY TECHNICAL-SOFTWARE MEANS - Google Patents

Abstract

The voltage conversion unit of the cabinet of the basic complex of high-tech hardware and software for automating the control of technological equipment of a power plant, characterized in that it contains triggers with a set of logic circuits that implement the logic "I", "OR", as well as contacts for connecting to power circuits and terminal blocks .

Description

The field of technology.

The utility model relates to the field of energy, electrical engineering and automation and can be used to build automated control systems and technological processes of power plants.

State of the art

Currently, well-known cabinets in general are used to place remote control units, to form technological protection teams; signaling, analog-discrete signal conversion, logical signal conversion, time delays, voltage conversion, providing in-cabinet connections between blocks and cross terminal blocks.

At the same time, BPN2 type units are installed in these cabinets

UKTS performs the functions of controlling technological parameters and controlling equipment of technological systems in accordance with the algorithms specified in UKTS.

In emergency conditions, when the initiating event is generated, UKTS provides the necessary signals for the impact on the mechanisms and electrical fittings of technological safety systems. The mechanisms are launched in a certain sequence, the closing / opening of valves UKTS manages the equipment of technological systems of nuclear power plants (NPPs) and thermal (TPPs).

In the UKTS complexes, the input (measurement of values) of analog signals takes place, the input of discrete signals that determine the state of the equipment and technological processes of the NPP power unit, the logical processing, the output of control and signaling commands by the UKTS-M cabinets, in which the voltage conversion units BPN2-M are located.

Voltage conversion blocks (BPN2-M) are intended for inputting signals and generating signals at the output; for processing discrete signals in accordance with the functional purpose.

The disadvantages of the BPN2-M block include:

- lack of redundancy of the logical circuit;

- the lack of the ability to transmit information over digital local area networks;

- lack of internal diagnosis;

- low reliability of components;

- high heat dissipation and, as a consequence, the need to install fans in the cabinet where the unit is installed;

- designated service life of 10 years;

- MTBF of 50,000 hours

A control cabinet is known, comprising a vertically oriented rectangular frame formed by vertical racks and front beams fastened together, the cabinet being made with compartments separated by a vertical partition: cable and functional equipment attachments, the last of which is equipped with retractable modular units installed in tiers throughout the compartment volume at the same time, rails are fixed on each tier for each modular block, and each modular block is equipped with rails for interaction with the guides of the corresponding tier and the clamp of the required position in the cabinet, providing independent extension of any block. At the same time, the position lock of the block contains a spring-loaded rod fixed to the base of the block, connected with a handle mounted for movement in a L-shaped hole made on the front panel of the block, with horizontal plates with rows of holes for entering into them installed on each tier them corresponding spring-loaded latch (see patent for utility model RU 61471,27.02.2007, H02B 1/30).

A multi-section plug-in module is known, comprising functional blocks connected by a backplane and protected by a housing that is divided into at least two sections, each of which has mounting boards with electrical connectors attached to the contact ends, connected to electrical connectors on the backplane and mounted in parallel a side wall of the housing, on the opposite side of the backplane there is a docking connector connected to the mating part with ykovochnogo backplane connector adjacent section, wherein the backplane attached to the side walls of the housing, adjacent sections are connected to each other by means of strips arranged on the side walls of the housing. At the same time, a shield is placed between the backplanes of the neighboring sections, which protects against electromagnetic radiation (see utility patent RU 120310, 09/10/2012, H05K 7/02, 7/18).

The well-known KSO KTPS-PN cabinet for collecting data on the state of technological equipment of nuclear power plants, characterized in that it consists of three subracks, one of which is used to install service units: power supplies, voltage control unit, network devices, the second and third are used for installation functional blocks that provide the collection of analog signals - unified DC and voltage signals, signals from thermocouples and resistance thermocouples, as well as the collection and generation of discrete signals, moreover, the function All the blocks have a redundant internal structure for converting the input signal and are connected by a local highway according to the RS-485 standard, which provides the possibility of sequential polling of function blocks with a cycle of less than 20 ms, while filters are built into the function blocks to suppress sinusoidal noise at frequencies of 50 and 60 Hz At the same time, galvanic isolation in digital circuits and high-precision measuring ADCs are used in analog blocks, and cabinet communication lines from the inputs of functional blocks to hubs duplicated completely (.cm. Utility Model Patent RU 136608, 01/10/2014, F01K 7/00).

Disclosure of a utility model The technical result is to increase the reliability of the developed voltage conversion unit (BPN2) of the complex of technical and software tools of increased reliability KTPS-PN.

The claimed technical result is achieved as follows.

The voltage conversion unit (BPN2), the cabinet of the basic complex of hardware and software tools of increased reliability (SB KTPS-PN) for automating the control of technological equipment of a power plant, according to the utility model, contains a scheme for implementing tight control logic on triggers with a set of logic circuits that implement the logic “I ”,“ OR ”, as well as contacts for connecting to power circuits and terminal blocks.

Utility Model Implementation

The voltage conversion unit with diagnostics and redundancy (BPN2), located in the cabinet of the basic KTPS-PN SB, of the KTPS-PN complex of high-reliability hardware and software, is designed to coordinate the voltage of the switching fields XT and ХВ, and the logical processing of input signals.

The unit provides light signaling of output voltages on the front panel and the delivery of all necessary information in digital form to the local network of functional units (LSSF).

The block provides:

- reception of DC signals with a voltage of plus 24 V with galvanic separation of input circuits from the circuit of the unit and the conversion of these signals into discrete DC signals with a voltage of 12 V;

- receiving DC signals with a voltage of plus 24 V without galvanic separation of circuits and converting these signals into discrete DC signals with a voltage of plus 12 V;

- the issuance of information signals in digital form to a local area network of functional blocks (LSSB) for transmission to a peripheral controller;

- signaling the presence of output signals by LEDs on the front panel;

- block failure alarm;

- the issuance of details (type of unit, serial number, production date, version of the software recorded in the unit, design location and address of the installation location in the cabinet) in the LSSB for input into the peripheral controller.

The unit is made in a unified design, in its design contains contacts for connecting to power circuits, a local network and terminal blocks. The block can be installed in any position of the second and third racks of the cabinet.

The BPN2 block is a group of functional blocks of the cabinet of the basic SB KTPS-PN and is an integral part of the complex of technical and software tools of increased reliability, designed to create automated control systems and technological processes by design and transfer information about the state of technical equipment of the cabinet and technological equipment to the system top block or station level.

The assigned service life of the unit is at least 30 years. MTBF of at least 200,000 hours

A high MTBF of MTBF2 is achieved through the use of highly reliable electronic components, partial duplication of circuits inside the unit. The low-power electronic components used in the unit do not require forced ventilation of the cabinet in which the unit is installed.

Thus, the claimed unit has the following capabilities that are absent from the analogue, which is extremely important, since national and international safety requirements are imposed on the operability of equipment providing the technological process, for example, nuclear power plants.

The block retains the performance of all functions in the event of any one malfunction in it due to internal duplication in the block.

The unit allows removal and installation of it back into the cabinet without turning off the power to the cabinet.

The block provides active and passive diagnostics, providing early detection of a malfunction before the failure of the control function.

Troubleshooting in the unit occurs during active and passive control of the elements.

In passive control, the unit checks the correspondence of the output signals with the signals generated by the unit depending on the totality of the input signals. In passive control, the unit detects malfunctions of input circuits with galvanic isolation in the presence of active signals at the inputs.

Passive diagnostics of the outputs is carried out each time after writing data to the key registers.

Passive diagnostics is based on a comparison of the data recorded in the key registers and the information read from the outputs of the block. Tasks of passive diagnostics of outputs (in priority order):

- prevent the generation of a false signal;

- determine if there is an error in writing data to the key registers;

- determine if there are malfunctions in the key register control circuits;

- determine if there are short circuits in the unit loads.

In active control, the unit checks the operability of circuits and nodes by supplying short-term signals "0" or "1" to the input of the node and reading the result of the action at the output. The duration of the test signals (15 ... 100) μs is selected so as not to cause false triggering of actuators and false alarms.

Thus, active input diagnostics checks input signal multiplexers, optocoupler transistors, and comparators.

The diagnostic system also checks the watchdog timers and indicators on the front panel of the unit.

Passive control of inputs and outputs is carried out every 1.5 ms. Active control of inputs is carried out once every 1.5 ms. Active control of exits is carried out once every 12 hours. The indicators on the front panel of the unit are checked once every 5 s.

When a malfunction occurs, the unit generates:

- general output signal "Fault";

- a signal to one of the LEDs "Fault" of the front panel of the unit;

- flashing signal to both LEDs "Fault" in the event of a short circuit in the load.

After removing the short circuit in the load circuit, the fault signals are removed. The duration of the Fault signal is at least 2 s.

The unit remains operational in the absence of a supply voltage of +24 V.

Thus, the technical result is achieved by a combination of essential features of a utility model.

Claims (1)

The voltage conversion unit of the cabinet of the basic complex of high-tech hardware and software for automating the control of technological equipment of a power plant, characterized in that it contains triggers with a set of logic circuits that implement the logic "I", "OR", as well as contacts for connecting to power circuits and terminal blocks .