Hitachi Energy Patente

A coil block fixation system (30) for a transformer comprises a coil block body to be coupled to a coil (19) of the transformer, and a supporting plate that is coupled to an upper surface (23) of the coil block body (10) opposite a bottom surface (24) of the coil block body (10). The coil block fixation system (30) further comprises two or more rods (3) that are coupled to an upper surface (21) of the supporting plate (1) opposite a bottom surface (22) of the supporting plate (1) for setting a load to the supporting plate (1) towards the coil block body (10). The supporting plate (1) and the coil block body (10) are formed geometrically in coordination with each other such that one comprise at least one recess (13, 14) and the other one comprise at least one protrusion (9, 16) that extends into the corresponding recess (13, 14) forming a respective movement limiter to counteract a translation and/or a rotation of the supporting plate (1) relative to the coil block body (10).

When supporting ancillary services for a target power system, existing solutions consider a fixed capacity of the battery energy storage system. In contrast, disclosed embodiments leverage a forecast of ancillary events, in combination with an optimization model, to produce an optimal determination for ancillary services. In particular, required capacity may be calculated from the forecast of ancillary events, and a capacity constraint may be generated from the required capacity and incorporated into the optimization model. Then, the optimization model may be solved to produce an optimal determination for ancillary services.

A coil block fixation system (30) for a transformer comprises a coil block body to be coupled to a coil (19) of the transformer, and a supporting plate that is coupled to an upper surface (23) of the coil block body (10) opposite a bottom surface (24) of the coil block body (10). The coil block fixation system (30) further comprises two or more rods (3) that are coupled to an upper surface (21) of the supporting plate (1) opposite a bottom surface (22) of the supporting plate (1) for setting a load to the supporting plate (1) towards the coil block body (10). The coil block fixation system (30) further comprises two or more spring elements (2) one of which is coupled to the associated rod (3) such that the load set to the supporting plate (1) is provided with a given flexibility with respect to a mounting direction from the coil block body (10) to the rods (3).

There is disclosed herein a protection device (100) adapted to protect a series compensation unit (SCU, 102) for a power line (2), wherein the protection device (100) comprises a mechanical switch (104), configured to close to thereby bypass the SCU (102), and a triggered spark gap (TSG, 106) connected across the mechanical switch 104, configured to trigger in response to a trigger signal. The actuator of the mechanical switch (104) is powered by an energization circuit (108) electrically connected in series between the SCU (102) and the TSG (106), or by at least one energy storage (118) in the series compensation unit (102). There is further disclosed herein a series compensation system (1) comprising such a protection device (100) arranged across a series compensation unit (102).

The invention relates to a method for producing an insulator for gas insulated switchgear (20) by injection molding a thermoplastic resin (4). The method comprises a filling step (100) of filling a cavity (3) of a mold (1, 2) with molten thermoplastic resin (4) and a packing step (200) of packing the thermoplastic resin (4) in the mold (1, 2) under controlled pressure. The molten thermoplastic resin (4) is introduced into the cavity (3) via at least a first inlet opening group and a second inlet opening group and the packing step (200) includes a first packing sub-process step (200a) and a second packing sub-process step (200b) of controlling the pressure of the first inlet opening group and the second inlet opening group.

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A wall bushing for high voltage application is presented. The wall bushing comprises a grounded shield (2). The grounded shield comprises a grading ring (6) in a distal end thereof. The grading ring has an elliptic cross section (7) with conjugate diameters, wherein a major diameter of the conjugate diameters is arranged in an axial direction of the grounded shield and a minor diameter of the conjugate diameters is arranged in a radial direction of the grounded shield. The major diameter is larger than the minor diameter.

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A semiconductor power module (10) for a semiconductor device comprises a leadframe or substrate (4) and a resin body that is coupled to the leadframe or substrate (4). The resin body includes at least a first resin element (1) and a second resin element (2), wherein a resin material of the first resin element (1) is different from a resin material of the second resin element (2). The resin elements (1, 2) are configured such that they are separated in part at least with respect to surface areas facing each other by means of a recess (5, 6).

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A transformer comprises a transformer housing, a stationary contact (4), a load break rotary switch (6) and a magnetically sensitive indicator component (20). The transformer housing comprises a transformer housing wall (2) separating an inner housing area (I) from an outer housing area (II). The stationary contact (4) is disposed stationary relative to the housing. The load break rotary switch (6) comprises a shaft (8), comprising a shaft portion (10) which is disposed in the inner housing area (I) and a shaft contact (12) attached to the shaft portion (10). The shaft (8) is supported with respect to the transformer housing wall (2) rotatably about a rotary axis (R) between a first position in which the shaft contact (12) is electrically connected to the stationary contact (4) and a second position in which the shaft contact (12) is electrically not connected to the stationary contact (4). The load break rotary switch (6) further comprises a lever (14) connected to the shaft portion (10) with respect to the rotary axis (R) in a rotationally fixed manner, wherein the lever (14) comprises a lever portion (16) having a radial distance (d) from the rotary axis (R). The lever portion (16) comprises a lever magnet (18). The magnetically sensitive indicator component (20) is attached to the transformer housing wall (2), wherein the magnetically sensitive indicator component (20) is placeable selectively into a first state in which the magnetically sensitive indicator component (20) is indicative of the first state and into a second state in which the magnetically sensitive indicator component (20) is indicative of the second state. The magnetically sensitive indicator component (20) is switched from its first state into its second state by the lever magnet (18) when the shaft (8) is rotated from the first position to the second position or vice versa. Thus, an operator of the transformer can make sure that the shaft contact is disconnected from the stationary contact before preforming a maintenance work.

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A power semiconductor device (1) comprising a semiconductor body (2) extending in a vertical direction between a first main surface (21) and a second main surface (22), a trench (4) extending from the first main surface (21) into the semiconductor body (2) in the vertical direction, and an insulated trench gate electrode (3) that is formed on the first main surface (21) and extends into the trench (4) is specified, wherein the trench (4) comprises along a main horizontal extension direction of the trench (4) a plurality of alternating deeper segments (41) and the insulated trench gate electrode (3) continuously extends over the plurality of segments (41).

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