CN-121710512-B - Change-over switch device and control method

CN121710512BCN 121710512 BCN121710512 BCN 121710512BCN-121710512-B

Abstract

The invention discloses a change-over switch device and a control method. The device comprises a change-over switch module and a working condition sensing module, wherein the change-over switch module is connected between the pair of electric power equipment, the change-over switch module comprises a plurality of switch assemblies and auxiliary assemblies corresponding to the switch assemblies respectively, the switch assemblies respectively comprise a first IGCT element and a second IGCT element, the corresponding auxiliary assemblies comprise an auxiliary IGCT element and an auxiliary switching element, the auxiliary switching element is respectively connected with the auxiliary IGCT element and the first IGCT element and the second IGCT element of the corresponding switch assemblies, and the working condition sensing module is connected with the change-over switch module. The invention solves the technical problems of damage to the change-over switch device and even reduced reliability of the power system caused by the fact that the change-over switch device cannot flexibly adapt to different working condition scenes in the related art.

Inventors

ZHAO BIN
CAI JING
ZHANG YING
LIU RUOXI
CHEN ZEXI
DAI HANQI
WANG DAWEI
TANG CUNWEI
YANG YAQI

Assignees

国网北京市电力公司
北京怀柔实验室
北京鼎诚鸿安科技发展有限公司

Dates

Publication Date: 20260508
Application Date: 20260214

Claims (9)

1. A switching device, comprising: A change-over switch module (N) and a working condition sensing module (G); The switching module (N) is connected between a pair of power equipment, wherein the pair of power equipment comprises a first power equipment (M1) and a second power equipment (M2), the switching module (N) comprises a plurality of switch assemblies and auxiliary assemblies (F) respectively corresponding to the plurality of switch assemblies, the plurality of switch assemblies respectively comprise a first IGCT element (K1) and a second IGCT element (K2), the corresponding auxiliary assemblies (F) comprise an auxiliary IGCT element and an auxiliary switching element, the auxiliary switching element is respectively connected with the auxiliary IGCT element, and the first IGCT element (K1) and the second IGCT element (K2) of the corresponding switch assemblies are respectively connected, the first IGCT element (K1) is reversely connected in parallel with the second IGCT element (K2), the plurality of switch assemblies comprise a first switch assembly, a second switch assembly and a third switch assembly, wherein the power inlet end of the first switch assembly is used for connecting the power inlet end of a three-phase power supply, and the power inlet end of the second switch assembly is used for connecting the power inlet end of the three-phase power supply; The working condition sensing module (G) is connected with the change-over switch module (N), wherein the working condition sensing module (G) is used for determining module working condition parameters of the change-over switch module (N) and respectively sending corresponding working condition adjustment signals to a plurality of auxiliary switching elements according to the module working condition parameters, the plurality of auxiliary switching elements are in one-to-one correspondence with the plurality of switch assemblies, the corresponding working condition adjustment signals are used for controlling the corresponding auxiliary switching elements to execute target operation or not, and the target operation comprises any one of switching a first IGCT element (K1) of the corresponding switch assembly into the auxiliary IGCT element and switching a second IGCT element (K2) of the corresponding switch assembly into the auxiliary IGCT element; The working condition sensing module (G) comprises a plurality of element sensing units, an association sensing unit and a working condition determining unit, wherein the element sensing units are respectively connected with corresponding target IGCT elements in the target IGCT elements, the target IGCT elements comprise a first IGCT element (K1) and a second IGCT element (K2) which are respectively corresponding to the switch components, the element sensing units are respectively used for detecting target states of the corresponding target IGCT elements so as to obtain element working condition parameters of the corresponding target IGCT elements, the target states comprise element states and power states of the corresponding target IGCT elements, the association sensing unit is respectively connected with the target IGCT elements, wherein the association sensing unit is used for determining state association relations between any one of the target IGCT elements and other target IGCT elements so as to obtain association state parameters corresponding to the switch module (N), the working condition determining unit is respectively connected with the association sensing unit and the association sensing unit so as to obtain the element working condition parameters of the corresponding target IGCT elements, the working condition sensing module (N) is respectively connected with the association sensing units, and the working condition sensing parameters of the corresponding target IGCT elements are respectively, and the working condition sensing module is used for determining the working condition parameters of the corresponding to the switch module.
2. The apparatus of claim 1, wherein the association sensing unit comprises: the association status parameter is determined by: determining topology correlation parameters respectively corresponding to the target IGCT elements; Determining a state propagation matrix according to the topological association parameters respectively corresponding to the target IGCT elements, wherein the state propagation matrix is used for representing the state association relationship between any two target IGCT elements in the target IGCT elements; And determining the association state parameters according to the state propagation matrix.
3. The apparatus according to claim 1, characterized in that said switching module (N) further comprises: The system comprises a plurality of voltage control units, a plurality of current control units, a plurality of temperature control units and a protection trigger control unit; the voltage control units are respectively and correspondingly connected with corresponding switch assemblies in the switch assemblies and are used for controlling voltage change intervals at two ends of the corresponding switch assemblies; the plurality of current control units are respectively connected with corresponding target IGCT elements in the plurality of target IGCT elements, wherein the plurality of target IGCT elements comprise a first IGCT element (K1) and a second IGCT element (K2) which are respectively corresponding to the plurality of switch assemblies and are used for controlling the current change interval of the corresponding target IGCT elements; The plurality of temperature control units are respectively and correspondingly connected with corresponding target IGCT elements in the plurality of target IGCT elements, and are used for controlling the temperature change interval of the corresponding target IGCT elements; The protection trigger control unit is used for performing corresponding activation control on the plurality of voltage control units, the plurality of current control units and the plurality of temperature control units respectively.
4. The apparatus of claim 3, wherein the protection trigger control unit is configured to perform corresponding activation control on the plurality of voltage control units, the plurality of current control units, and the plurality of temperature control units, respectively, and further comprising performing corresponding activation control by: Determining first activation parameters corresponding to the plurality of voltage control units according to the voltage parameters corresponding to the plurality of switch components respectively, wherein the corresponding voltage parameters comprise voltage values at two ends of the corresponding switch components, and voltage change amplitudes at two ends of the corresponding switch components; determining second activation parameters corresponding to the current control units according to the voltage variation amplitudes corresponding to the switch components respectively, wherein the current parameters comprise current values of the target IGCT elements and current variation amplitudes of the target IGCT elements; Determining third activation parameters corresponding to the plurality of temperature control units according to the voltage variation amplitudes respectively corresponding to the plurality of switch components and the current variation amplitudes and the temperature parameters respectively corresponding to the plurality of target IGCT elements; and according to the first activation parameters respectively corresponding to the voltage control units, the second activation parameters respectively corresponding to the current control units, the third activation parameters respectively corresponding to the temperature control units, and corresponding activation control is performed on the voltage control units, the current control units and the temperature control units.
5. The device according to claim 1, characterized in that the anode of the first IGCT element (K1) is connected to the feed end, the cathode of the first IGCT element (K1) is connected to the discharge end, the anode of the second IGCT element (K2) is connected to the discharge end, and the anode of the second IGCT element (K2) is connected to the feed end.
6. The apparatus of any one of claims 1 to 5, wherein the pair of power devices includes any one of a first pair of devices, a second pair of devices, and a third pair of devices, the first pair of devices being determined from a transformer and a bus bar corresponding to the transformer, the second pair of devices being determined from a primary power supply device and an auxiliary power supply device, the third pair of devices being determined from a transformer and a load device corresponding to the transformer.
7. A change-over switch control method, characterized in that a change-over switch device according to any one of claims 1 to 6 is employed.
8. An electronic device, comprising: A processor; a memory for storing the processor-executable instructions; And a diverter switch assembly as claimed in any one of claims 1 to 6.
9. A computer readable storage medium, characterized in that instructions in the computer readable storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the switcher control method as claimed in claim 7.

Description

Change-over switch device and control method Technical Field The invention relates to the field of power systems, in particular to a change-over switch device and a control method. Background The transfer switching device plays a key role in the power system, not only for power distribution and control, but also for fault isolation and protection, in relation to the reliability of the power system and the stability of power transmission. In the related art, the change-over switch device cannot flexibly adapt to different working condition scenes, so that the technical problems of damage to the change-over switch device and even reduction of the reliability of a power system exist. In view of the above problems, no effective solution has been proposed at present. Disclosure of Invention The embodiment of the invention provides a change-over switch device and a control method, which at least solve the technical problems of damage to the change-over switch device and even reduced reliability of a power system caused by the fact that the change-over switch device cannot flexibly adapt to different working condition scenes in the related art. According to one aspect of the embodiment of the invention, a change-over switch device is provided, and comprises a change-over switch module N and an auxiliary switching element G, wherein the change-over switch module N is connected between a power equipment pair, the power equipment pair comprises a first power equipment M1 and a second power equipment M2, the change-over switch module N comprises a plurality of switch components and auxiliary components F respectively corresponding to the switch components, the switch components respectively comprise a first IGCT element K1 and a second IGCT element K2, the corresponding auxiliary components F comprise auxiliary IGCT elements and auxiliary switching elements, the auxiliary switching elements are respectively connected with the auxiliary IGCT elements, and the first IGCT element K1 and the second IGCT element K2 of the corresponding switch components are respectively connected with the change-over switch module N, the condition sensing module G is used for determining module working condition parameters of the change-over switch module N and respectively sending corresponding auxiliary switching elements to the auxiliary switching elements according to the module working condition parameters, the corresponding auxiliary switching elements are respectively used for executing one of the first switching elements and the auxiliary switching elements and the corresponding to the second switching elements, and the first switching elements and the corresponding to the second switching elements are respectively corresponding to the auxiliary switching elements 1. The working condition sensing module G comprises a plurality of element sensing units, an association sensing unit and a working condition determining unit, wherein the element sensing units are respectively connected with corresponding target IGCT elements in the target IGCT elements, the target IGCT elements comprise a first IGCT element K1 and a second IGCT element K2 which are respectively corresponding to the switch components, the element sensing units are respectively used for detecting the target states of the corresponding target IGCT elements so as to obtain element working condition parameters of the corresponding target IGCT elements, the target states comprise element states and power states of the corresponding target IGCT elements, the association sensing units are respectively connected with the target IGCT elements, wherein the association sensing unit is used for determining the state association relation between any one of the target IGCT elements and other target IGCT elements so as to obtain association state parameters corresponding to the switch module N, the working condition determining unit is respectively connected with the association sensing units and the corresponding elements so as to obtain the element working condition parameters of the corresponding target IGCT elements, the association sensing units are respectively connected with the corresponding switch modules, and the working condition sensing parameters are respectively determined according to the state association parameters of the corresponding target IGCT elements and the switch modules. Optionally, the association sensing unit comprises determining the association state parameters by determining topology association parameters corresponding to the target IGCT elements respectively, determining a state propagation matrix according to the topology association parameters corresponding to the target IGCT elements respectively, wherein the state propagation matrix is used for representing a state association relation between any two target IGCT elements in the target IGCT elements, and determining the association state parameters according to the state propagation matrix. The swit