RU210953U1 - Controller of the controlled point of sectioning of medium voltage electric networks - Google Patents

Abstract

The utility model relates to electrical engineering, in particular to controllers of controlled sectioning points (UPS) of distribution electric networks, which provide disconnection of the emergency section of the power line in the event of a short circuit (SC) on the line during the dead pause of the automatic reclosing function (AR). The technical result of the application of the utility model is to expand the scope of the UPS controller, as well as to reduce the number of equipment items required to implement the function of the UPS controller to shut off the emergency section of the line in the event of a short circuit on the line during the dead pause of the automatic reclosure. The above technical result is achieved by performing, as part of the UPS controller, analog measuring inputs for measuring three-phase alternating current in the form of standard analog measuring inputs for direct measurements of alternating current 50 Hz with a nominal value (rms value of the phase current) of 1 A (with a limiting multiplicity value, in order to ensure the possibility flow of emergency current, up to 40). In this case, in the case of the use of these controllers at the connections of power facilities (electrical substations), the need for additional external scale current converters is eliminated, since the connection is made to the existing measuring current transformers installed at the connection (outgoing line) of the substation. 1 w.p. f-s. 2 ill.

Description

FIELD OF TECHNOLOGY

The utility model under consideration relates to controllers of controlled sectioning points (UPS) of distribution electric networks (hereinafter referred to as UPS controllers), which provide disconnection of the emergency section of the power line (taps) in the event of a short circuit (short circuit) on the line during the dead pause of the automatic reclosing function ( APW).

BACKGROUND OF THE INVENTION

A current control and network monitoring device TOPAZ USS.0419.ZTO [1] from the manufacturer PLC Technology LLC is known, intended for use as part of a controlled sectioning point (UPS) based on the disconnector CJSC ZETO RLKS-10.1 \ 7400UHL1 with a motor drive SDA-1 UHL1. The specified controlled sectioning point (UPS) with the TOPAZ USS.0419.ZTO device [1] includes, among other things, a high-voltage switching unit that implements the function of automatic disconnection of the line during a dead pause, and optical current sensors integrated into the high-voltage switching block. At the same time, the TOPAZ USS.0419.ZTO network monitoring and disconnector control device includes a TOPAZ IEC DAS МХ681 data access server with a TOPAZ ТМ MTU5 telemechanics module and a TOPAZ OCTU current control system (SKT) module; at the same time, network monitoring is carried out on the basis of processing analog information received from TOPAZ FOS SKT current sensors and from an auxiliary transformer (TSN) (voltage presence / loss indication). At the same time, the TOPAZ USS.0419.ZTO device includes a set of discrete input channels, a set of discrete output channels, a GSM wireless digital interface, a set of external digital wired interfaces, including Ethernet and RS-485. At the same time, the current control and monitoring device [1] includes a large number of equipment elements, including a separate data access server and a telemechanics module, as well as a separate SKT module with three separate optical current sensors, additionally installed separately from the main SKT module in a high-voltage switching room. UPS block, which generally complicates the device, reduces the reliability of its operation and increases labor costs for its operation.

Known as a prototype UPS controller ML-300RTU as part of a controlled point for sectioning a distribution network from the manufacturer GK Mikronika-Lisis [2], which provides the function of shutting off the emergency section of the power line (tap) in the event of a short circuit on the line during a dead pause of the AR function . The specified controller (1) (see Fig. 1) is made in the form of a single device in a single housing and includes a set of interfaces (2) telesignaling (up to 8 discrete inputs in the controller), a set of interfaces (3) remote control (up to 4 discrete outputs), one channel (4) for connecting the measured phase voltage (from the auxiliary transformer (TSN)), three input channels for connecting analog signals of the measured primary current (3 phases); a block (5) of wireless digital communication interfaces, including a GSM interface (GSM antenna connections). The above interfaces (including 2-5) are connected to the main computing and control unit (6) of the device, which, among other things, performs the functions of analyzing the values of the input analog signals of the measured primary current (from the three corresponding inputs of the controller), identifying the values emergency current and dead time interval with the appropriate control of discrete outputs to implement tripping in the dead time interval of the automatic reclosure. At the same time, the input channels for connecting analog signals of the measured primary current of the controller are implemented in the form of analog measuring inputs (7) of a voltage with a nominal value of 4 millivolts, proportional to the value of the primary (phase) current measured by the UPS controller; at the same time, in order to connect the controller to the primary measured electrical network via measuring current inputs, in addition to connecting through traditional measuring transformers of alternating current with a secondary current rating of 1 Ampere, intermediate external sensors (8) of the current flow are required, providing a scale conversion (1 A/4 mV) of the value measured current. In addition, the controller does not include an Ethernet interface (Fast/Gigabit), which makes it difficult to integrate the controller into a modern "digital substation" (DPS). As part of the above UPS controller, there is also an interface (9) for connecting an external power supply (24 V DC), connected to the power supply unit (10) of the device, which provides power to all hardware components of the controller.

DISCLOSURE OF THE ESSENCE OF THE UTILITY MODEL

The task to be solved by the utility model is to expand the scope of UPS controllers, in particular, to provide the possibility (simplification) of the use of UPS controllers, in addition to directly on power lines, also on connections (outgoing feeders) of electrical substations, while simplifying the design of the device.

The technical result of the application of the utility model is to expand the scope of application of UPS controllers, in particular, to enable and simplify the use of UPS controllers at connections (outgoing feeders) of electrical substations, as well as to reduce the required number of equipment items to implement the function of the UPS controller to shut off the emergency section of the line in the event of Short circuit on the line during the currentless pause of the automatic reclosure.

The above technical result is achieved by performing, as part of the UPS controller, analog measuring inputs for measuring three-phase alternating current in the form of standard analog measuring inputs for direct measurements of alternating current 50 Hz with a nominal value (rms value of the phase current) of 1 A (with a limiting multiplicity value, in order to ensure the possibility flow of emergency current, up to 40). At the same time, in the case of the use of these controllers at the connections of power facilities (electrical substations), the need for the use of additional external large-scale current converters is eliminated, since the connection is made to existing measuring current transformers installed at the connection (outgoing line) of the substation.

In a particular case, the proposed UPS controller may include at least one external digital Ethernet (Fast/Gigabit) interface and a corresponding Ethernet controller connected, on the one hand, to the above Ethernet (Fast/Gigabit) interface, and, with on the other hand, with the computing control unit of the controller; at the same time, the computing and control unit of the device can be configured with the additional possibility of information exchange via the Ethernet network with external devices, including top-level systems, including for receiving control commands from top-level systems, ensuring appropriate control of the device’s discrete outputs . At the same time, an additional technical result is achieved, which consists in simplifying the integration of the UPS controller into modern "digital" electrical substations (DPS) in accordance with the IEC 61850 standard.

BRIEF DESCRIPTION OF THE DRAWINGS

In FIG. 1 shows a prototype diagram of the proposed UPS controller.

In FIG. 2 shows a diagram of the proposed UPS controller.

IMPLEMENTATION OF UTILITY MODEL

Shown in FIG. 2, the proposed UPS controller (11) includes elements (2-7, 9, 10) described above in the UPS controller prototype. In addition, the proposed controller (11) includes three measuring inputs (12) of alternating current 50 Hz with a nominal value of 1 Ampere (proportional to the value of the primary (phase) current measured by the UPS controller) from the measuring current transformer, the signals received through which are transmitted to the corresponding internal scale converters ( transformers) current (13) into the output low-voltage voltage signal for subsequent transmission to the unit (6) to perform the function of analyzing the values of the input analog signals of the measured primary current. The presence of the above inputs (12) of alternating current with a nominal value of 1 A provides the ability to connect the device (through these inputs) to existing measuring current transformers at the connection of the power facility (electrical substation), which facilitates the possibility of using the controller not only on the power lines themselves, but also on electrical connections. substations connected to the specified lines, which expands the scope of the UPS controller, and eliminates the need for additional intermediate (external in relation to the UPS controller) scale converters of the measured current, which reduces the number of equipment elements used to implement the functions of the UPS controller.

In a particular case, the controller (11) may contain an external digital Ethernet interface (14) with a corresponding Ethernet controller (15) connected to the main computing and control unit (6) of the device. At the same time, the computing and control unit (6) of the device can be made with the additional ability to support information exchange protocols via the Ethernet network in accordance with IEC 61850 (in particular, IEC 61850-8-1 GOOSE messages), which simplifies the integration of the UPS controller into modern "digital substations" (DPS).

SOURCES OF INFORMATION

[1] Website https://tpz.ru/resheniya/459/.

[2] Website https://www.gov.spb.ru/static/writable/ckeditor/uploads/2016/12/28/%D0%A3%D0%9F%D0%A1_v.2.1.pdf.

Claims (2)

1. The controller of the controlled point of sectioning of medium voltage electric networks, which includes at least one discrete input interface, at least one discrete output interface, one interface for connecting the measured phase voltage, three interfaces for connecting the input analog signals of the measured primary current, a block of wireless digital communication interfaces, a basic computing and control unit, an interface for connecting an external power supply and a controller power supply unit, where discrete input and output interfaces, an interface for connecting the measured phase voltage, three interfaces for connecting input analog signals of the measured primary current and interfaces as part of the wireless digital communication interfaces are connected to the basic computing and control unit, which provides the following functions: analysis of the values of the input analog signals of the measured primary current from the three corresponding input interfaces of the controller, detection of causes of the emergency current and detection of the moment of occurrence of a dead pause of automatic reclosing (AR), with the corresponding control of discrete outputs for the implementation of tripping in the dead pause of the AR, characterized in that the interfaces for connecting the input analog signals of the measured primary current of the controller are made in the form of standard analog measuring inputs direct measurements of alternating current with a nominal value of 1 A, and each of the above interfaces is additionally equipped with a scale current converter for converting the input analog signal of the measured primary current into a low-level signal for subsequent transmission to the basic computing and control unit. 2. The controller according to claim. 1, characterized in that it additionally contains an Ethernet interface and an Ethernet controller, where the Ethernet controller is connected to the Ethernet interface and the basic computing and control unit.

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