• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a solid-state automatic on-load voltage regulator which allows switching between the different taps of a transformer by means of purely electronic devices, dispensing with all types of movable part, comprising a casing with a box for each phase, comprising: a power board provided with solid-state switches; a control board that monitors and controls the power board and receives/emits signals by optical fibre from the central control board; and a power source with multiple outputs in addition to protection elements, varistors, and voltage transformers, none of the boxes having movable parts.
    公开号:ES2680487A1
    申请号:ES201890042
    申请日:2015-12-18
    公开日:2018-09-07
    发明作者:Daniel FERNÁNDEZ HEVIA；Angel Lara Garoz
    申请人:Inael Electrical Systems S A；INAEL ELECTRICAL SYSTEMS SA；
    IPC主号:
    专利说明:

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    LOAD AUTOMATIC VOLTAGE REGULATOR
    DESCRIPTION
    TECHNICAL FIELD OF THE INVENTION
    The present invention is encompassed in the field of charge voltage regulators.
    BACKGROUND OF THE INVENTION
    Voltage control in distribution networks is gaining prominence in the context of smart grids, associated with the penetration of renewable and / or distributed energy resources, as well as with the necessary infrastructure for the massive implementation of electric vehicles. The electricity market demands a qualitative and quantitative increase in the ability to control the voltage profile in the distribution network.
    The distribution transformers are equipped with “manual tap changers”, which are voltage regulators that need to be operated manually (by an operator physically located in front of the transformer) and without load, ie, with the power line cut off and the supply to the customers interrupted They are purely mechanical devices, based on a crank that drives a mechanism that transforms the rotating movement into a linear movement, moving a contact plate that switches two adjacent contacts closing the circuit formed by the medium voltage winding of each phase. They are usually a source of problems and need abundant maintenance.
    For a long time, an innovative solution has been sought to equip both distribution transformers and wind farm transformers and other distributed generation systems with voltage regulation equipment that is automatic and can operate on load, ie, that can regulate the voltage without interrupting the supply.
    Very few of these teams have been put on the market, and the only ones that are
    know are based on the use of an electric motor to move the same set
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    of mobile contacts that in the manual / no load case, combined with a set of electric vacuum switches that allow switching between the different sockets of the transformer, even when there is voltage between them and current is passing (that is, switching, as already It has been said above, "in charge"). These types of devices can be described as "electromechanical" and maintain the existence of moving parts: a motor and a set of contacts that slide on a plate inside the transformer.
    DESCRIPTION OF THE INVENTION
    The present invention is established and characterized in the independent claims, while the dependent claims describe other features thereof.
    The object of the invention is a solid-state automatic voltage regulator in charge, which allows switching between the different sockets of the coils of a transformer of both liquid and dry dielectric isolation by means of purely electronic devices, eliminating all types of moving parts. The technical problem to solve is to configure the regulator to reach the mentioned object.
    The advantages of the regulator are:
    - absence of moving parts;
    - modularity: these are “plug & play” devices in which a defective element can be exchanged for a new one in a matter of minutes, as illustrated in the composition of the equipment for three independently controllable single-phase units;
    - phase independence: the preferred configuration consists of three independent elements, one per phase, which can regulate each phase independently (as, of course, can regulate all three phases identically and simultaneously);
    - availability of regulation, monitoring and obtaining electrical measurements locally or remotely;
    - high efficiency and reliability;
    - high compaction;
    - high integration in smart grids;
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    - low maintenance;
    - possibility of improving performance as the power electronics improve the available commercial devices.
    BRIEF DESCRIPTION OF THE FIGURES
    The present specification is complemented with a set of figures, illustrative of the preferred example, in this case a transformer with liquid dielectric isolation, and never limiting the invention.
    Figure 1 represents a perspective view of the regulator with three boxes because in the configuration shown it is three-phase.
    Figure 2 represents a perspective view of an envelope and a box for a phase.
    Figure 3 represents a perspective view of the inside of a box with its different electronic elements.
    Figure 4 represents a face of the power plate.
    Figure 5 represents the other side of the power plate.
    Figure 6 represents a diagram of the connection of the regulator with the central control. DETAILED EXHIBITION OF THE INVENTION
    Next, an embodiment of the invention is shown with support in the figures for the case of its use in transformer with liquid dielectric isolation. However, the embodiment is equally applicable to the case of a so-called "dry type" transformer.
    Figures 1 and 2 show an automatic voltage regulator on load, comprising: a connection receiver envelope (1) for each phase connected to the
    regulation sockets of each of the transformer's medium voltage coils,
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    in which a box (2) is housed and connected for each phase that contains the electronic regulation and control elements, both enclosure (1) and box (2) are sealed and made of plastic material suitable for operating under high temperatures, of up to 95 ° C, acidic environments, and with high dielectric strength, high enough to isolate a regulator between 24 and 36 kV.
    The box (2) is formed by the following elements, according to figures 3 to 5:
    to. a power board (2.1) equipped with solid state switches (2.11) and its associated operating electronics (2.12) which also optionally includes: transition resistors, drivers, protection and safety elements, as well as connectors for control signals and power, heat sink adapted to the aforementioned components with their corresponding ventilation elements;
    b. a control board (2.2), which is responsible for monitoring and controlling the power board (2.1) as well as the emission / reception of signals by optical fiber (5) that interact with a central control (3), the control board (2.2) optionally comprises the different signal adaptation components, microcontroller, optical signal connectors and temperature, voltage and intensity control sensors;
    C. power supply (2.3) multiple output;
    d. protection elements (2.4), varistors and voltage transformers; lacking each box (2) of moving parts.
    Optionally, the solid state switches (2.11) may consist of thyristors, IGBTs, MOSFETs, or JBTs.
    In short, the components described above are configured so that they are housed inside the boxes (2) to allow the largest number of components to be packaged in the smallest possible space, respecting the integrity of the signals.
    Optionally, the central control panel (3), Fig 6, comprises:
    to. a central control board that monitors and controls each of the control boards (2.2) of each of the phases by means of optical fiber (5), formed by a microprocessor, by a signal microcontroller and the electronics associated therewith;
    b. a remote communications unit (4) with inputs and outputs connecting to the central control board, for remote monitoring, control, regulation and measurement of the automatic regulation of load voltage;
    C. display (“display”),
    5 d. protective continent closet.
    权利要求:
    Claims (3)
    [1]
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    1. - Automatic load voltage regulator for dry type transformers
    as insulated in oil or any other dielectric liquid, comprising an envelope (1), characterized in that in said envelope (1) a box (2) is housed for each phase, both envelope (1) and box (2) are sealed and in dielectric strength plastic material high enough to insulate a regulator between 24 and 36 kV, suitable for operating at temperatures up to 95 ° C and acidic environments, and the box (2) comprises:
    to. a power board (2.1) equipped with solid state switches (2.11) and its associated operating electronics (2.12);
    b. a control board (2.2), which is responsible for monitoring and controlling the power board, as well as the emission / reception of signals by optical fiber (5) that interact with a central control (3), said central control (3) It also includes:
    i. a central control board that monitors and controls each of the control boards (2.2) of each of the phases by means of optical fiber (5), formed by a microprocessor, by a signal microcontroller and the electronics associated therewith;
    ii. a remote communications unit (4) with inputs and outputs connecting to the central control board, for remote monitoring, control, regulation and measurement of the automatic regulation of load voltage;
    iii. screen;
    iv. protective continent closet;
    C. multiple output power supply;
    d. protection elements (2.4), varistors and voltage transformers; lacking each box (2) of moving parts.
    [2]
    2. - Regulator according to claim 1 wherein the solid state switches
    (2.11) are thyristors, IGBTs, MOSFETs, or JBTs.
    [3]
    3. - Regulator according to any of claims 1 or 2 wherein the plate
    power (2.1) also includes transition resistors and trip drivers of
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    the components that comprise it, protection and safety elements, in addition to connectors for control and power signals, heatsink adapted to the aforementioned components with their corresponding fans.
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    同族专利:
    公开号 | 公开日
    ES2680487B1|2019-06-19|
    WO2017103296A1|2017-06-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JP2521250B2|1984-10-24|1996-08-07|三菱電機株式会社|Tap switching device under load|
    US5581173A|1991-01-03|1996-12-03|Beckwith Electric Co., Inc.|Microcontroller-based tap changer controller employing half-wave digitization of A.C. signals|
    ES2318961B1|2006-05-19|2010-02-04|Universidad De Sevilla|OPTIMIZED STATIC SOCKET CHANGER FOR HIGH / MEDIUM VOLTAGE AND HALF / LOW VOLTAGE TRANSFORMERS.|
    CA2765160A1|2009-06-11|2010-12-16|Abb Research Ltd.|A versatile distribution transformer|
    US20150243428A1|2014-02-21|2015-08-27|Varentec, Inc.|Methods and systems of field upgradeable transformers|GB2597801A|2020-08-07|2022-02-09|Bristol Bluegreen Ltd|An apparatus for regulating the voltage delivered to a load|
    法律状态:
    2018-09-07| BA2A| Patent application published|Ref document number: 2680487 Country of ref document: ES Kind code of ref document: A1 Effective date: 20180907 |
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    优先权:
    申请号 | 申请日 | 专利标题
    PCT/ES2015/070925|WO2017103296A1|2015-12-18|2015-12-18|Automatic on-load voltage regulator|
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