CN117353456A - Control protection system of split type on-load tap-changer voltage-regulating phase shifter - Google Patents

Control protection system of split type on-load tap-changer voltage-regulating phase shifter Download PDF

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Publication number
CN117353456A
CN117353456A CN202311339589.3A CN202311339589A CN117353456A CN 117353456 A CN117353456 A CN 117353456A CN 202311339589 A CN202311339589 A CN 202311339589A CN 117353456 A CN117353456 A CN 117353456A
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China
Prior art keywords
control
switch
phase shifter
layer
network
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Pending
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CN202311339589.3A
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Chinese (zh)
Inventor
杨浩
汪大全
丁峰峰
陈羽
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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Priority to CN202311339589.3A priority Critical patent/CN117353456A/en
Publication of CN117353456A publication Critical patent/CN117353456A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00001—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
    • H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The invention discloses a control protection system of a split type on-load tap-changer voltage-regulating phase shifter, which adopts a three-layer two-network architecture and comprises a station control layer, a spacer layer and an on-site terminal; the spacing layer and the station control layer are communicated through 61850 protocol to form a monitoring network; and a GOOSE control network is formed between the spacer layer and the in-situ intelligent terminal equipment. The invention ensures that the phase shifter control system is reliably connected into the existing transformer substation comprehensive automation system, ensures the realization of various control protection strategies of the phase shifter, adopts the GOOSE control network to be independent from the monitoring network, shortens the time delay of data acquisition and action execution, meets the requirements of quick control and adjustment, and improves the reliability of the power flow optimization control in normal operation and the protection action in fault.

Description

Control protection system of split type on-load tap-changer voltage-regulating phase shifter
Technical Field
The invention belongs to the technical field of flexible alternating current transmission, and particularly relates to a control protection system of a voltage-regulating phase shifter of a split type on-load tap-changer.
Background
The phase shifter is an important component of flexible alternating current transmission system equipment, can realize reasonable distribution of transmission power of a line, avoids overload or underload of main equipment of the system, improves the efficiency of a transmission channel, and reduces the transmission cost. The phase shifter has the technical advantages of good economy, small occupied area and low operation and maintenance cost, and has wider application scenes in the power grid in the load-dense area.
The phase shifter is arranged on one side of the line in series, and the amplitude or phase angle of the line voltage is changed by injecting compensation voltage into the line to adjust the line power flow. The body of the phase shifter is a phase shifting transformer, two sides of the phase shifting transformer are respectively called a load side and a power supply side, the voltage modulus values of the two sides are equal, and the phase angle difference is continuously adjustable within a certain range. The flow of active power can be controlled through phase angle adjustment of phase shift, and the purpose of reasonably distributing line tide to improve power transmission capacity is achieved.
The current actual put-into-service phase shifter is mostly an on-load voltage-regulating phase shifter, in the phase shifter structure, a conventional tapping switch is positioned inside a transformer, a transient switching process has no direct electric quantity monitoring and protecting means, and is in a black box state, and micro faults of the phase shifter cannot be found and quickly protected as soon as possible, so that larger faults of the transformer are easy to be caused. To reduce this risk, studies have been made to propose a technique for a split on-load tap-changer: on the basis of a conventional voltage regulating mechanism, the tapping selector is reserved in the transformer, and the change-over switch is externally arranged; therefore, the change-over switch is controlled by an independent mechanism, can integrate a current transformer and a voltage transformer, and can realize closed-loop control and quick protection, so that the whole voltage-regulating switching process is considerable, controllable and protectable.
However, the control protection system of the split type on-load tap changer voltage regulating phase shifter relates to the access and application of various control protection devices such as phase shifter control, split type tap changer control, auxiliary decision, phase shift change protection, line protection and the like, and the networking structure and method of the control protection system of the phase shifter are not researched in the prior art. The phase shifter needs to execute a control strategy in real time according to the running state of equipment and also ensures reliable access with a comprehensive automatic system of a transformer substation, so that a networking framework and a networking method of a control protection system of the split type on-load tap-changer voltage-regulating phase shifter need to be researched.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides a control protection system of a split type on-load tap-changer voltage-regulating phase shifter, which adopts a three-layer two-network architecture, namely a station control layer, a spacer layer and an on-site terminal, which are distributed in equal layers, and a control protection unit is independently networked based on a fast GOOSE control network.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a control protection system of a split type on-load tap-changer voltage-regulating phase shifter adopts a three-layer two-network architecture, and the system comprises a station control layer, a spacer layer and an on-site terminal;
the station control layer is used for monitoring, controlling and managing the phase shifter and carrying out information interaction with remote scheduling;
the spacer layer is used for controlling the local terminal according to the control instruction of the station control layer and the information sent by the local terminal under the normal operation of the phase shifter; under the fault condition of the phase shifter, a protection action instruction is sent to the on-site terminal;
the on-site terminal is used for controlling the change-over switch of the split on-load tap-changer and the on-site intelligent terminal equipment to perform corresponding actions based on the instructions issued by the spacer layer;
the spacing layer and the station control layer are communicated through 61850 protocols to form a monitoring network;
and a GOOSE control network is formed between the spacer layer and the local intelligent terminal equipment of the local terminal.
Further, the station control layer includes:
the phase shifter monitors a background workstation and is used for switching a control mode of a transformer substation, selecting a control target of the phase shifter and monitoring the running state of the phase shifter;
the remote communication unit is a communication interface unit between the station end and the remote dispatching end and is used for uploading the gear, the alarm signal, the switch and knife switch position signal, the action signal and the analog quantity signal of the phase shifter system to the remote dispatching, and receiving a control mode switching or gear shifting instruction from the remote dispatching and sending the command to the spacer layer.
Further, the in-situ terminal includes:
each internal switch driving mechanism of the change-over switch is used for sending the state information of each internal switch position of the change-over switch to the spacing layer; and controlling the change-over switch to execute corresponding actions according to the opening or closing instructions of each internal switch sent by the spacer layer;
the remote module is used for collecting the internal current data of the change-over switch and sending the current data to the spacer layer;
the on-site intelligent terminal equipment is used for collecting the state information of each breaker and the position information of the isolating switch in the interval of the phase shifter on site and sending the state information and the position information to the interval layer through the GOOSE control network; and controlling each breaker and the isolating switch to execute corresponding actions according to the instruction issued by the spacer layer.
Further, the spacer layer includes:
the phase shifter control unit is used for acquiring the position information of each inner switch of the change-over switch and the current gear information of the on-load voltage regulating mechanism from the tapping switch control unit through the GOOSE control network and sending a gear shifting instruction of the on-load voltage regulating mechanism for shifting up or shifting down to the tapping switch control unit through the GOOSE control network;
the tapping switch control unit is used for acquiring internal current data of the diverter switch and position state information of each internal switch of the diverter switch from the on-site terminal; and issuing a switching-off or switching-on instruction of each internal switch to each internal switch driving mechanism of the change-over switch;
the line interval measurement and control unit is used for acquiring the state information of each circuit breaker and the position information of the isolating switch in the phase shifter interval from the on-site terminal, performing logic interlocking, and issuing switching-on and switching-off control instructions of each circuit breaker and the isolating switch to the on-site intelligent terminal equipment through the GOOSE control network;
the phase-shifting protection unit and the line protection unit are used for sending a tripping instruction to the on-site intelligent terminal equipment through the GOOSE control network during the protection action;
the auxiliary decision unit is used for calculating and judging the operation mode of the transformer substation, judging whether the circuit trips and fails, calculating the section power, receiving the failure and section data calculated on the opposite sides of the circuit through inter-station communication, and sending the data on the two sides to the phase shifter control unit through the GOOSE control network.
Further, the tapping switch control unit is communicated with the remote end module in a point-to-point mode, and acquires current data inside the change-over switch; and communicating with each internal switch driving mechanism of the change-over switch in a point-to-point mode, and collecting the position and state information of each internal switch of the change-over switch.
Further, the communication medium between the tap switch control unit and the remote end module is an optical fiber;
the communication medium between the tapping switch control unit and each internal switch driving mechanism in the change-over switch is an optical fiber.
Further, each internal switch of the change-over switch adopts a mechanical switch or a power electronic switch;
the mechanical switch comprises at least one of an oil switch, a sulfur hexafluoride switch and a vacuum switch;
the power electronic switch comprises at least one of a silicon controlled rectifier, an insulated gate bipolar thyristor, an electron injection enhanced gate thyristor, an integrated gate commutated thyristor and a metal oxide semiconductor field effect thyristor.
Further, the monitoring network adopts optical fiber or Ethernet;
the GOOSE control network adopts optical fiber or Ethernet.
Furthermore, the phase shifter control unit, the tapping switch control unit, the line interval measurement and control unit, the phase shift protection unit, the line protection unit, the auxiliary decision unit and the on-site intelligent terminal equipment all adopt main and standby double-set redundancy configuration.
Further, the GOOSE control network adopts a dual-network redundancy configuration.
The beneficial effects brought by adopting the technical scheme are as follows:
the control protection system of the split on-load tap-changer voltage-regulating phase shifter provided by the invention adopts a three-layer two-network architecture, and comprises a station control layer, a spacer layer and an on-site terminal; the spacing layer and the station control layer are communicated through 61850 protocol to form a monitoring network; and a GOOSE control network is formed between the spacer layer and the in-situ intelligent terminal equipment. The system ensures that the phase shifter control system is reliably connected into the existing transformer substation comprehensive automation system, ensures the realization of various control protection strategies of the phase shifter, adopts GOOSE to rapidly control and network the control protection equipment configured on the spacer layer and the on-site terminal, shortens the time delay of data acquisition and action execution, meets the requirements of rapid control and adjustment, and improves the reliability of the power flow optimization control and the protection action in the case of faults in normal operation.
Drawings
Fig. 1 is a control protection system networking architecture of a split on-load tap-changer voltage-regulating phase shifter provided by an embodiment of the invention;
fig. 2 is a schematic diagram of a main connection of a voltage-regulating phase shifter of a split on-load tap-changer according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a redundancy configuration of a control protection system network architecture of a voltage-regulating phase shifter of a split on-load tap-changer according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a change-over switch in a tap changer according to an embodiment of the invention.
Detailed Description
The invention is further described below. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
The invention provides a control protection system of a split type on-load tap-changer voltage-regulating phase shifter, which is shown in figure 1, and adopts a three-layer two-network architecture, namely a control system with equal layer distribution of a station control layer, a spacer layer and an on-site terminal, and two groups of relatively independent networks of a monitoring network and a control network.
The station control layer comprises a phase shifter monitoring background workstation 102 and a remote communication unit 101, and is used for monitoring, controlling and managing the phase shifter and performing information interaction with remote scheduling.
The phase shifter monitoring background workstation 102 is used for monitoring, controlling and managing the phase shifter at the substation end, and specifically includes: different control modes such as a main transformer limiting heavy load reverse feeding mode, an equalizing station power mode, a fixed line power mode and the like are switched, and a control target of the phase shifter is selected; meanwhile, the operation state of the phase shifter can be monitored by monitoring the background in the remote dispatching end and the station.
The remote communication unit 101 is a communication interface unit between a station end and a remote scheduling end, and is configured to perform information interaction with remote scheduling, and includes: uploading the gear, alarm signal, switch and knife switch position signal, action signal and important analog quantity signal of the phase shifter system to the dispatching, and receiving the control mode switching or gear shifting command from the dispatching.
The spacer layer comprises a phase shifter control unit 201, a tapping switch control unit 202, a line interval measurement and control unit 203, a phase shift protection unit 204, a line protection unit 205, an auxiliary decision unit 206 and the like, and is used for performing system state control, line loop closing control, power flow optimization control and protection and emergency control functions under the condition of faults under the normal operation of the phase shifter.
The in-situ terminal comprises devices such as an internal switch driving mechanism 301, a remote module 302, an in-situ intelligent terminal 303 and the like for switching the switch, so as to control and protect an outlet execution unit.
The spacing layer and the station control layer are communicated through 61850 protocol to form a monitoring network, and the medium of the monitoring network is optical fiber or Ethernet.
As shown in fig. 1, according to some embodiments, the phase shifter control unit 201, the tap changer control unit 202, the line interval measurement and control unit 203, the phase shift protection unit 204, the line protection unit 205, the auxiliary decision unit 206, the in-situ intelligent terminal 303 and other devices are equipped with GOOSE network interfaces and connected to a high-speed network switch to form a GOOSE control network, so as to implement fast control, and the GOOSE network medium is an optical fiber or ethernet and is independent from the monitoring network, so that the device has the characteristics of reliability, high efficiency and fast speed.
As shown in fig. 1, according to some embodiments, the phase shifter control unit 201 is configured to collect, from the tap changer control unit 202 via a GOOSE control network, status information such as each internal switch position information of the switch and a current gear of the on-load tap changer, and send, to the tap changer control unit 202 via the GOOSE control network, a shift command for shifting up or down the on-load tap changer.
As shown in fig. 1, according to some embodiments, the tap switch control unit 202 communicates with each remote module 302 in the switch in a point-to-point manner, collects current data inside the switch, and the communication medium is an optical fiber.
As shown in fig. 1, according to some embodiments, the tap switch control unit 202 communicates with each internal switch driving mechanism 301 of the switch in a point-to-point manner, collects the position status information of each internal switch of the switch, and issues an opening or closing command of each internal switch to each internal switch driving mechanism 301, where the communication medium is an optical fiber.
As shown in fig. 1, according to some embodiments, when the phase-shift protection unit 204 and the line protection unit 205 perform protection actions, a trip instruction is sent to the on-site intelligent terminal 303 through the GOOSE control network, and the on-site intelligent terminal 303 performs a circuit breaker trip operation.
As shown in fig. 1, according to some embodiments, the auxiliary decision unit 206 is configured to calculate and determine the operation mode of the substation, determine whether the line is tripped or fails, calculate the section power, etc., and receive the data calculated on the opposite side of the line through inter-station communication, and send the data on both sides to the phase shifter control unit 201 through the GOOSE control network. The phase shifter control unit 201 executes control logic in different substation states according to the received data and states.
As shown in fig. 1, according to some embodiments, the in-situ intelligent terminal 303 is configured to collect, in situ, state information of each circuit breaker and position information of the isolating switch in the phase shifter interval, and send the state information and the position information of the isolating switch to the phase shifter control unit 201 and the line interval measurement and control unit 203 through a GOOSE control network;
the phase shifter control unit 201 performs starting or stopping sequence control according to the acquired state information of each breaker and the position information of the isolating switch in the interval;
the phase shifter control unit 201 and the line interval measurement and control unit 203 realize logic interlocking between each breaker and each isolating switch in the phase shifter interval, and control instructions of each breaker and each isolating switch are issued to the on-site intelligent terminal through the GOOSE control network, and the on-site intelligent terminal executes opening and closing operations of the breakers and the isolating switches.
It should be noted that, the phase shifter control unit 201 and the line interval measurement and control unit 203 may both implement logic interlocking, and specifically, the control of the switch is performed in which measurement and control device (generally, the switch in the phase shifter is controlled by the phase shifter control unit 201, and the switch in the periphery of the phase shifter is controlled by the line interval measurement and control unit 203). The logic interlocking refers to the on-off position interlocking between the disconnecting link and the ground knife and between the circuit breakers.
The phase shifter body is a phase shifting transformer, and consists of a parallel transformer and a series transformer, wherein the two sides of the series transformer are respectively called a load side and a power supply side, and the phase angle difference is continuously adjustable within a certain range. The phase shifter is arranged on one side of the circuit, and changes the amplitude or phase angle of the circuit voltage by injecting compensation voltage into the circuit, so as to regulate the circuit power flow and improve the power transmission capability. Fig. 2 is a schematic diagram of main wiring of a voltage-regulating phase shifter of a split type on-load tap-changer, in whichV LA 、V LB 、V LC Respectively representing three-phase voltage amplitudes on the load side;V SA 、V SB 、V SC respectively representing three-phase voltage amplitude values of a power supply side; the three-phase outlet regulating voltages provided by the phase shifters are respectivelyΔV A 、ΔV B 、ΔV C 。
As shown in fig. 2, the split on-load tap changer is composed of a tap selector 401 located inside a transformer and a diverter switch located outside the transformer, and the diverter switch is composed of three single-phase diverter switches 501, 502, 503 of A, B, C. Each single-phase change-over switch is constructed as shown in fig. 4. And in the single-phase change-over switch, 701, 702, 703 and 704 are all electronic transformers, and are used for collecting current data inside the tapping switch and collecting the current data in a remote module of the change-over switch. 601. 602, 603, 604, 605, 606, 607, 608 are their respective internal switches.
Each internal switch may employ a mechanical switch or a power electronic switch, wherein the mechanical switch includes at least one of an oil switch, a sulfur hexafluoride switch, and a vacuum switch, and the power electronic switch includes at least one of a silicon controlled rectifier, an insulated gate bipolar thyristor, an electron injection enhanced gate thyristor, an integrated gate commutated thyristor, and a metal oxide semiconductor field effect thyristor.
As shown in fig. 3, according to some embodiments, a phase shifter control unit, a tap changer control unit, a line interval measurement and control unit, a phase shift protection unit, a line protection unit, an auxiliary decision unit, an on-site intelligent terminal and the like connected to a GOOSE network may all adopt a primary-backup dual-set redundancy configuration, so as to improve control reliability.
As shown in fig. 3, the GOOSE control network may employ a A, B dual-network redundancy configuration to improve control reliability according to some embodiments.
The technical scheme provided by the embodiment fills the blank of networking architecture and method of the split type on-load tap changer voltage-regulating phase shifter control protection system, ensures that the phase shifter control system is reliably connected into the existing transformer substation comprehensive automation system, ensures the realization of various control protection strategies of the phase shifter, adopts GOOSE to rapidly control and networking control protection equipment configured on a spacer layer and an on-site terminal, shortens the delay of data acquisition and action execution, meets the requirements of rapid control and regulation, and improves the flow optimization control during normal operation and the protection action reliability during faults.
The above embodiments are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereto, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the present invention.

Claims (10)

1. The control protection system of the split type on-load tap-changer voltage-regulating phase shifter is characterized by adopting a three-layer two-network architecture, wherein the system comprises a station control layer, a spacing layer and an on-site terminal;
the station control layer is used for monitoring, controlling and managing the phase shifter and carrying out information interaction with remote scheduling;
the spacer layer is used for controlling the local terminal according to the control instruction of the station control layer and the information sent by the local terminal under the normal operation of the phase shifter; under the fault condition of the phase shifter, a protection action instruction is sent to the on-site terminal;
the on-site terminal is used for controlling the change-over switch of the split on-load tap-changer and the on-site intelligent terminal equipment to perform corresponding actions based on the instructions issued by the spacer layer;
the spacing layer and the station control layer are communicated through 61850 protocols to form a monitoring network;
and a GOOSE control network is formed between the spacer layer and the local intelligent terminal equipment of the local terminal.
2. The control and protection system of a split on-load tap-changer voltage-regulating phase shifter of claim 1, wherein the station-control layer comprises:
the phase shifter monitors a background workstation and is used for switching a control mode of a transformer substation, selecting a control target of the phase shifter and monitoring the running state of the phase shifter;
the remote communication unit is a communication interface unit between the station end and the remote dispatching end and is used for uploading the gear, the alarm signal, the switch and knife switch position signal, the action signal and the analog quantity signal of the phase shifter system to the remote dispatching, and receiving a control mode switching or gear shifting instruction from the remote dispatching and sending the command to the spacer layer.
3. The control and protection system for a split on-load tap-changer voltage-regulating phase shifter of claim 1, wherein the on-site terminal comprises:
each internal switch driving mechanism of the change-over switch is used for sending the state information of each internal switch position of the change-over switch to the spacing layer; and controlling the change-over switch to execute corresponding actions according to the opening or closing instructions of each internal switch sent by the spacer layer;
the remote module is used for collecting the internal current data of the change-over switch and sending the current data to the spacer layer;
the on-site intelligent terminal equipment is used for collecting the state information of each breaker and the position information of the isolating switch in the interval of the phase shifter on site and sending the state information and the position information to the interval layer through the GOOSE control network; and controlling each breaker and the isolating switch to execute corresponding actions according to the instruction issued by the spacer layer.
4. A control and protection system for a split on-load tap-changer voltage-regulating phase shifter according to claim 3, wherein the spacer layer comprises:
the phase shifter control unit is used for acquiring the position information of each inner switch of the change-over switch and the current gear information of the on-load voltage regulating mechanism from the tapping switch control unit through the GOOSE control network and sending a gear shifting instruction of the on-load voltage regulating mechanism for shifting up or shifting down to the tapping switch control unit through the GOOSE control network;
the tapping switch control unit is used for acquiring internal current data of the diverter switch and position state information of each internal switch of the diverter switch from the on-site terminal; and issuing a switching-off or switching-on instruction of each internal switch to each internal switch driving mechanism of the change-over switch;
the line interval measurement and control unit is used for acquiring the state information of each circuit breaker and the position information of the isolating switch in the phase shifter interval from the on-site terminal, performing logic interlocking, and issuing switching-on and switching-off control instructions of each circuit breaker and the isolating switch to the on-site intelligent terminal equipment through the GOOSE control network;
the phase-shifting protection unit and the line protection unit are used for sending a tripping instruction to the on-site intelligent terminal equipment through the GOOSE control network during the protection action;
the auxiliary decision unit is used for calculating and judging the operation mode of the transformer substation, judging whether the circuit trips and fails, calculating the section power, receiving the failure and section data calculated on the opposite sides of the circuit through inter-station communication, and sending the data on the two sides to the phase shifter control unit through the GOOSE control network.
5. The control and protection system of a split on-load tap changer voltage-regulating phase shifter according to claim 4, wherein the tap changer control unit communicates with the remote module in a point-to-point manner, and collects current data inside a diverter switch; and communicating with each internal switch driving mechanism of the change-over switch in a point-to-point mode, and collecting the position and state information of each internal switch of the change-over switch.
6. The control and protection system of a split on-load tap-changer voltage-regulating phase shifter of claim 5, wherein,
the communication medium between the tapping switch control unit and the remote end module is an optical fiber;
the communication medium between the tapping switch control unit and each internal switch driving mechanism in the change-over switch is an optical fiber.
7. The control protection system of a split on-load tap-changer voltage-regulating phase shifter according to claim 1, wherein each internal switch of the change-over switch adopts a mechanical switch or a power electronic switch;
the mechanical switch comprises at least one of an oil switch, a sulfur hexafluoride switch and a vacuum switch;
the power electronic switch comprises at least one of a silicon controlled rectifier, an insulated gate bipolar thyristor, an electron injection enhanced gate thyristor, an integrated gate commutated thyristor and a metal oxide semiconductor field effect thyristor.
8. The control and protection system of a split on-load tap-changer voltage-regulating phase shifter according to claim 1, wherein,
the monitoring network adopts optical fiber or Ethernet;
the GOOSE control network adopts optical fiber or Ethernet.
9. The control protection system of the split on-load tap changer voltage regulating phase shifter according to claim 4, wherein the phase shifter control unit, the tap changer control unit, the line interval measurement and control unit, the phase shift protection unit, the line protection unit, the auxiliary decision unit and the on-site intelligent terminal equipment all adopt a main-standby double-set redundancy configuration.
10. The control and protection system of a split on-load tap-changer voltage-regulating phase shifter of claim 1, wherein the GOOSE control network adopts a dual-network redundancy configuration.
CN202311339589.3A 2023-10-16 2023-10-16 Control protection system of split type on-load tap-changer voltage-regulating phase shifter Pending CN117353456A (en)

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CN202311339589.3A CN117353456A (en) 2023-10-16 2023-10-16 Control protection system of split type on-load tap-changer voltage-regulating phase shifter

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Application Number Priority Date Filing Date Title
CN202311339589.3A CN117353456A (en) 2023-10-16 2023-10-16 Control protection system of split type on-load tap-changer voltage-regulating phase shifter

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