CN209402237U - Electric control bus coupler switch system - Google Patents

Abstract

This application relates to an electric control bus tie switch system. The electric control bus tie switch system includes the electric control bus tie switch group, power supply components and control devices. The power supply component is used to provide power for the electric control bus tie breaker group. The control device is electrically connected with the power supply component, and is used for controlling the switching of the electric control bus tie switch group, and detecting the opening and closing state of the electric control bus tie switch group. Wherein, the electric control bus-tie switch group is electrically connected with the power supply component and the control device respectively. In the above electric bus tie switch system, the control device detects the opening and closing states of the electric control bus tie switch group before controlling the switching state of the electric control bus tie switch group, thereby improving safety. The electronic control bus tie switch system can automatically control the on-off action of the electric control bus tie switch group, provide safe and effective control for automatic discharge, ensure the smooth automatic charging and discharging of the battery, and further ensure the safety of the backup power supply system.

Description

Electric control bus tie switch system

technical field

The present application relates to the technical field of automatic control, in particular to an electric control bus tie switch system and a control method thereof.

Background technique

In the power system, the operating power supply of the substation, the communication power supply, the UPS of the computer room, etc. all use batteries as the backup power supply system in large quantities. For the safety of the power supply of the DC system, the backup power system usually adopts a double-battery and double-charge DC system with two sets of batteries. The double-electric double-charge DC system has two sets of batteries, the first set of batteries and the second set of batteries, and each set of batteries has an independent charger. The first set of battery packs is connected to the I-section DC bus, and the second set of batteries is connected to the II-section DC bus. The first group of batteries is in the main working state, and the second group of batteries is in the state of floating charging from the backup. Section I DC busbar is connected to Section II DC busbar through a manual mechanical bus tie switch, and the manual mechanical bus tie switch is normally open under normal circumstances.

Since the storage battery needs regular maintenance such as discharge, nuclear capacity, activation, etc., when manually discharging, it is necessary to manually close the manual mechanical bus tie switch, and then separate a group of batteries that need to be discharged from the bus, and turn on the dummy load discharge device for discharge. Therefore, the manual on-site discharge operation of the battery is time-consuming and laborious. With the application of automatic control technology, some single battery discharges have realized automatic control discharge. However, for the dual-battery and double-charge DC power system, it is still a difficult problem to realize the driving of the electronically controlled bus tie switch under the premise of ensuring the safety of the DC system during discharge.

Utility model content

Based on this, it is necessary to provide an electronically controlled bus tie switch system and its control method for the problem that it is difficult to realize the automatic control of the electronically controlled bus tie switch in the dual electric and double charging source system.

An electric control bus tie switch system, comprising:

Electric control bus tie switch group;

A power supply component, used to provide power for the electric control bus tie switch group; and

A control device, electrically connected to the power supply component, used to control the switching of the electric control bus tie switch group, and detect the opening and closing state of the electric control bus tie switch group;

Wherein, the electric control bus-tie switch group is electrically connected to the power supply component and the control device respectively.

In the above-mentioned electric control bus tie switch system, the power supply unit is used to provide power for the electric control bus tie switch group. The control device can control the automatic connection or disconnection of the two bus sections, that is, control the automatic switching of the electric control bus-tie switch group, so as to ensure the safety of power supply. In addition, the control device can detect the opening and closing state of the electric control bus tie switch group before controlling the switching state of the electric control bus tie switch group, thereby improving the safety of automatic control. The electronic control bus tie switch system can automatically control the on-off action of the electric control bus tie switch group, provide safe and effective control for automatic discharge, ensure the smooth automatic charging and discharging of the battery, and further ensure the safety of the backup power supply system .

In one of the embodiments, the electric control bus tie switch group includes:

The first main contact and the second main contact are respectively used for parallel connection with the manual mechanical bus tie switch arranged on the positive bus and the negative bus;

The first auxiliary contact and the second auxiliary contact are respectively connected in series with the control device to form a closed circuit; and

The first coil and the second coil are respectively connected in series with the power supply assembly and the control device to form a closed loop.

In one of the embodiments, the electric control bus tie switch group further includes:

A main contact terminal row, the first main contact and the second main contact are arranged on the main contact terminal row;

an auxiliary contact terminal block, the first auxiliary contact and the second auxiliary contact are disposed on the auxiliary contact terminal block; and

The coil terminal row, the first coil and the second coil are arranged on the coil terminal row.

In one of the embodiments, the electric control bus tie switch group includes:

Four DC contactors, each DC contactor includes a main contact, an auxiliary contact and a coil;

Wherein, two of the main contacts are connected in parallel as the first main contacts, and the other two main contacts are connected in parallel as the second main contacts;

Two of the auxiliary contacts are connected in parallel as the first auxiliary contacts, and the other two auxiliary contacts are connected in parallel as the second auxiliary contacts; and

Two of the coils are connected in parallel to form the first coil, and the other two coils are connected in parallel to form the second coil.

In one of the embodiments, the electric control bus tie switch group further includes:

The casing, the DC contactor is arranged in the accommodation cavity defined by the casing.

In one of the embodiments, the power supply component includes:

The first power supply device is connected in series with the control device and the first coil respectively to form a closed loop; and

The second power supply device is connected in series with the control device and the second coil respectively to form a closed loop.

In one of the embodiments, the control device is provided with:

The output interface, after being connected in series with the power supply component, is connected in series with the first coil and the second coil respectively to form a closed loop; and

The input interface is respectively connected in series with the first auxiliary contact and the second auxiliary contact to form a closed loop.

In one of the embodiments, the output interface includes:

The first output interface is respectively connected in series with the power supply component and the first coil to form a closed loop; and

The second output interface is respectively connected in series with the power supply component and the second coil to form a closed loop.

In one of the embodiments, the input interface includes:

The first input interface is connected in series with the first auxiliary contact to form a closed circuit; and

The second input interface is connected in series with the second auxiliary contact to form a closed circuit.

In one of the embodiments, the control device includes:

The communication device is used for communicating with the control terminal.

An electric control bus tie switch system, comprising:

Electric control bus tie switch group;

A power supply component is used to provide power for the electric control bus tie switch group;

A control device, electrically connected to the power supply component, used to control the switching of the electric control bus tie switch group, and detect the opening and closing state of the electric control bus tie switch group; and

A control terminal is connected in communication with the control device;

Wherein, the electric control bus-tie switch group is electrically connected to the power supply component and the control device respectively.

In one of the embodiments, the power supply component is a switching power supply.

In one of the embodiments, the control device includes a normally open relay electrically connected to the power supply assembly, and used to control the power supply assembly to supply power to the electric control bus tie switch group.

In one embodiment, the electrically controlled bus-tie switch group includes a plurality of DC contactors, and the plurality of DC contactors are connected in parallel to respectively control the on-off of two sections of positive busbars and two sections of negative busbars.

In one of the embodiments, a manual mechanical bus tie switch is also included, which is connected in parallel with the electric control bus tie switch group, and is used to provide manual control for the two bus sections.

In the electric control bus tie switch system provided in the above embodiment, by setting the first main contact, the second main contact, the first auxiliary contact, the second auxiliary contact, the The first coil and the second coil can realize the on-off control of the two positive busbars and the two negative busbars respectively. The main contact terminal row, the auxiliary contact terminal row, and the coil terminal row can form standardized connection terminals, and the housing can provide protection for the electric control bus-tie switch group. By connecting the two main contacts, the two auxiliary contacts and the two coils in parallel, malfunctions can be prevented and the safety of the electric control bus tie system can be improved. The first power supply device and the second power supply device can respectively supply power to a part of the electric control bus-tie switch groups arranged on the positive and negative bus bars. The output interface is used to control the switching of the electric control bus tie switch group, and the input interface can realize the monitoring of the opening and closing state of the electric control bus tie switch group, which improves the efficiency of the electric control bus tie switch system. security. The electronically controlled bus tie system system can effectively solve the problems of automatic battery discharge and bus tie switch automatic control in the substation dual-power double-charge DC power supply system, ensuring the safety and reliability of the automatic battery discharge of the DC power system, and improving the The level of automation and intelligence of substation DC power supply system.

Description of drawings

Fig. 1 is a schematic structural diagram of a part of the electric control bus tie switch system provided in the positive bus provided by the embodiment of the present application;

Fig. 2 is a schematic structural diagram of another partially electrically controlled bus-tie switch system provided on the positive bus provided by the embodiment of the present application;

Fig. 3 is a schematic structural diagram of another partial electric control bus tie switch system provided in the embodiment of the present application;

Fig. 4 is a schematic structural diagram of a partially electrically controlled bus-tie switch system provided on the negative bus provided in the embodiment of the present application;

Fig. 5 is a schematic structural diagram of an electric control bus tie switch set provided by the embodiment of the present application;

FIG. 6 is a schematic structural diagram of a control device provided in an embodiment of the present application;

Fig. 7 is a flow chart of a control method for an electronically controlled bus tie switch system provided by an embodiment of the present application;

Fig. 8 is a flow chart of another control method for an electronically controlled bus tie switch system provided by the embodiment of the present application;

Fig. 9 is a schematic structural diagram of another partial electric control bus tie switch system provided in the embodiment of the present application provided on the positive bus.

Explanation of reference numbers

100 Electric control bus tie switch system

10 electric control bus tie switch group

102 DC contactor

110 main contacts

111 First main contact

112 Second main contact

120 Auxiliary contacts

121 First auxiliary contact

122 Second auxiliary contact

130 Coils

131 First Coil

132 Second coil

140 main contact terminal block

150 Auxiliary contact terminal block

160 coil terminal block

170 shell

172 chamber

20 power supply components

210 First power supply device

220 Second power supply unit

30 Controls

310 output interface

311 The first output interface

312 Second output interface

320 input interface

321 The first input interface

322 Second input interface

330 communication device

40 control terminal

50 manual mechanical bus tie switch

Detailed ways

In order to make the above-mentioned purpose, features and advantages of the present application more obvious and understandable, the specific implementation manners of the present application will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments, and are not intended to limit the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to FIG. 1 , the present application provides an electric control bus tie switch system 100 . The electric control bus tie switch system 100 includes an electric control bus tie switch group 10 , a power supply assembly 20 and a control device 30 . The power supply assembly 20 is used to provide power for the electric control bus tie switch group 10 . The control device 30 is electrically connected to the power supply assembly 20 . The control device 30 is used for controlling the switching of the electric control bus tie switch group 10 and detecting the opening and closing state of the electric control bus tie switch group 10 . Wherein, the electric control bus tie switch group 10 is electrically connected to the power supply assembly 20 and the control device 30 respectively.

The electric control bus tie switch system 100 can be applied to a DC110V DC power supply system of a substation with double electricity and double charge. At the same time, the electronically controlled bus tie switch system 100 can also be applied to dual-electricity and dual-charge backup power systems in other fields, such as uninterruptible power systems for data centers such as government and railway systems, power supplies for communication base stations, and EPS emergency power supplies. The dual-electricity dual-charge DC system includes a first battery pack and a second battery pack. The first battery pack is electrically connected to the first section of the DC bus. The second battery pack is electrically connected to the second-section DC bus. The section I DC bus is connected to the II section DC bus through a manual mechanical bus tie switch. When the electric control bus tie switch system 100 is used, the electric control bus tie switch group 10 can be connected in parallel with the manual mechanical bus tie switch. Please refer to FIG. 2 , in an embodiment, the DC busbar of section I and the DC busbar of section II may be directly connected through the electric control bus-tie switch group 10 . The electric control bus tie switch system 100 can detect the state of the electric control bus tie switch group 10 and control the switching of the electric control bus tie switch group 10 .

The electric control bus tie switch group 10 includes a plurality of electric control bus tie switches, and the plurality of electric control bus tie switches are divided into two groups. The plurality of electrically controlled bus-tie switches in each group are connected in parallel, and are respectively used to control the positive busbar and the negative busbar of the dual-electricity dual-charge DC power supply system. By connecting the plurality of electronically controlled bus-tie switches in parallel, malfunctions can be reduced, the safety of the electronically controlled bus-tie switch group 10 can be improved, and the failure rate can be reduced.

The power supply assembly 20 may be a switching power supply, and a core component of the switching power supply is a DCDC converter. The switching power supply may be a DCDC drive power supply module. That is, the power supply assembly 20 may include a DCDC driving power module, and the DCDC driving power module provides DC working power for the electronically controlled bus tie switch group 10 . In one embodiment, the input of the DCDC drive power module can be DC110V, and the output can be DC24V. The input end of the DCDC power supply module is connected to the DC110V DC bus of the substation system, and the power is directly obtained from the DC bus, so that no additional power supply is needed, and the structure of the electric control bus tie switch system 100 is simplified. The DC24V output of the DCDC power supply module can be connected in series to the control device 30 through wires, and then connected to the electric control bus-tie switch group 10 through wires, so that the control device 30 can realize the control of the electric control bus. Link switch group 10 drive control. It can be understood that the DCDC drive power supply module has the advantages of low power consumption, high efficiency, small volume, light weight and wide voltage stabilization range.

The control device 30 is used for driving control of the electric control bus tie switch group 10 . The control device 30 may include a bus tie switch state monitoring module. The bus tie switch state monitoring module can execute commands to control the opening and closing actions of the electric control bus tie switch group 10 , thereby controlling the opening and closing of the electric control bus tie switch group 10 . It can be understood that the bus tie switch state monitoring module can monitor the opening and closing state of the electric control bus tie switch group 10 in real time, and feed back the detection information to the control terminal, which further improves the performance of the electric control bus tie switch system 100. safety. The control terminal is not limited, and the control terminal is an upper-level control device of the control device 30 .

The electric control bus tie switch system 100 provides power for the electric control bus tie switch group 10 through the power supply assembly 20 . The control device 30 can control the automatic connection or disconnection of the two bus sections, that is, control the automatic switching of the electric control bus-tie switch group 10, so as to ensure the safety of power supply. In addition, the control device 30 can detect the opening and closing state of the electric control bus tie switch group 10 before controlling the electric control bus tie switch group 10 to switch states, thereby improving the safety of automatic control. The electronic control bus tie switch system 100 can automatically control the on-off action of the electric control bus tie switch group 10, provide safe and effective control for automatic discharge, ensure the smooth progress of automatic charging and discharging of batteries, and further ensure that the backup power system Power supply security.

Please refer to Fig. 3-Fig. 4 together. In one embodiment, the electric control bus tie switch group 10 includes a first main contact 111, a second main contact 112, a first auxiliary contact 121, a second auxiliary contact Contact 122 , first coil 131 and second coil 132 . The first main contact 111 and the second main contact 112 are respectively used for parallel connection with manual mechanical bus tie switches arranged on the positive bus and the negative bus. The first auxiliary contact 121 and the second auxiliary contact 122 are respectively connected in series with the control device 30 to form a closed circuit. The first coil 131 and the second coil 132 are respectively connected in series with the power supply assembly 20 and the control device 30 to form a closed loop.

The first main contact 111 , the first auxiliary contact 121 and the first coil 131 are used to control the on-off of the positive bus at both ends. The second main contact 112 , the second auxiliary contact 122 and the second coil 132 are used to control the on-off of the negative bus bars at both ends. The first main contact 111 and the second main contact 112 are respectively used to connect in parallel with the manual mechanical bus tie switch arranged on the positive bus and the negative bus, so as to connect to the double electric double charging DC bus at both ends of the DC power system. The first main contact 111 and the second main contact 112 can respectively control the on-off of the positive bus and the negative bus, so as to control the access of the backup power system. The first auxiliary contact 121 and the second auxiliary contact 122 are respectively connected in series with the control device 30 to form a closed loop. Through the first auxiliary contact 121 and the second auxiliary contact 122, the control device 30 can detect the opening and closing state of the electric control bus tie switch group 10, and monitor the opening and closing state in real time. The above settings can realize the control of positive bus and negative bus at the same time.

Please refer to FIG. 5 together. In one implementation, the electric control bus tie switch set 10 further includes a main contact terminal block 140 , an auxiliary contact terminal block 150 and a coil terminal block 160 . The first main contact 111 and the second main contact 112 are disposed on the main contact terminal row 140 . The first auxiliary contact 121 and the second auxiliary contact 122 are disposed on the auxiliary contact terminal block 150 . The first coil 131 and the second coil 132 are disposed on the coil terminal block 160 .

The electric control bus tie switch set 10 can be integrated into the main contact terminal block 140 , the auxiliary contact terminal block 150 and the coil terminal block 160 . The plurality of electric control bus-tie switches in each group are connected in parallel to the corresponding interface terminal row welding pins with wires. The main contact terminal block 140 is connected in parallel with the manual mechanical bus tie switch, so as to be respectively connected to the DC positive and negative busbars of section I and the positive and negative DC busbars of section II. It can be understood that, after the power supply assembly 20 is connected in series with the control device 30 through wires, and then connected to the coil terminal block 160 through wires, the control device 30 can control all the positive and negative bus lines. The driving control of the electric control bus tie switch group 10 is described. The control device 30 can be connected to the auxiliary contact terminal block 150 through wires. Whether the first main contact 111 and the second main contact 112 on the positive and negative bus lines are effectively closed or opened can be detected through the auxiliary contact terminal block 150 . The arrangement of the above-mentioned terminal blocks can form standardized connection terminals, enhance the firmness of internal electrical connections, and prolong the service life of the electric control bus tie switch system 100 .

In one embodiment, the electric control bus tie switch group 10 includes four DC contactors 102 . Each DC contactor 102 includes a main contact 110 , an auxiliary contact 120 and a coil 130 . Wherein, two main contacts 110 are connected in parallel as the first main contacts 111 , and the other two main contacts 110 are connected in parallel as the second main contacts 112 . Two of the auxiliary contacts 120 are connected in parallel as the first auxiliary contacts 121 , and the other two auxiliary contacts 120 are connected in parallel as the second auxiliary contacts 122 . Two of the coils 130 are connected in parallel to form the first coil 131 , and the other two coils 130 are connected in parallel to form the second coil 132 .

Using four of the DC contactors 102 as the electric control bus tie switch group 10 can prolong the electrical life of the electric control bus tie switch group 10 and improve the safety performance. The main contacts 110 of the four DC contactors 102 are connected in parallel in groups of two, and are connected in parallel with the manual mechanical busbar through the main contact terminal row 140, so as to respectively connect to the DC positive and negative bus bars of section I and section II Segment DC positive and negative buses. The lead wires of the auxiliary contacts 120 and the coils 130 of the four DC contactors 102 are also connected in parallel corresponding to two groups, and are respectively connected to the auxiliary contact terminal block 150 and the coil terminal block 160 .

In one embodiment, the electric control bus tie switch set 10 further includes a housing 170 . The DC contactor 102 is disposed in an accommodating cavity 172 defined by the housing 170 .

The electric control bus tie switch group 10 can be centrally arranged in the accommodation chamber 172 defined by the housing 170. The shell 170 can be made of metal, and is used to provide protection for the electric control bus tie switch set 10 disposed inside the accommodating cavity 172 , so as to prolong the service life of the electric control bus tie switch set 10 . The main contact terminal row 140 , the auxiliary contact terminal row 150 and the coil terminal row 160 are arranged outside the accommodating cavity 172 , so as to form an integrated switch function component with standardized connection terminals. The electric control bus tie switch group 10 can be connected in parallel with the manual mechanical bus tie switch set on the DC bus through a standardized connection terminal, and is electrically connected to the power supply assembly 20 and the control device 30 respectively.

In one embodiment, the power supply assembly 20 includes a first power supply device 210 and a second power supply device 220. The first power supply device 210 is connected in series with the control device 30 and the first coil 131 respectively to form a closed loop. The second power supply device 220 is connected in series with the control device 30 and the second coil 132 respectively to form a closed loop.

The first power supply device 210 and the second power supply device 220 may be DCDC drive power supply modules. The DCDC drive power supply module directly takes power from the bus bar, and is used to provide DC power for the electric control bus tie switch group 10 . The first power supply device 210 and the second power supply device 220 supply power to the first coil 131 and the second coil 132 respectively, and can realize the electric control of the parts installed on the positive busbar and the negative busbar at the same time. Control of bus tie breaker group 10.

Please refer to FIG. 6 together. In one embodiment, the control device 30 is provided with an output interface 310 and an input interface 320 . After the output interface 310 is connected in series with the power supply assembly 20 , it is connected in series with the first coil 131 and the second coil 132 respectively to form a closed loop. The input interface 320 is connected in series with the first auxiliary contact 121 and the second auxiliary contact 122 respectively to form a closed circuit.

The control device 30 can control whether to supply power to the coil 130 of the electric control bus tie switch group 10 through the power supply component 20 by controlling the on and off of the output interface 310, thereby controlling the electric control bus tie Switching of switch group 10. Since the auxiliary contact 120 of the electric control bus tie breaker set 10 is linked with the main contact 110, the control device 30 can judge the electric control bus tie breaker set 10 through the input interface 320 The opening and closing state of the auxiliary contact 120 is further determined to further determine the opening and closing state of the main contact 110 of the electric control bus tie switch group 10 . It can be understood that the control device 30 can monitor the opening and closing state of the electric control bus tie switch group 10 in real time during the whole process of controlling the switching of the electric control bus tie switch group 10, and The opening and closing status of the control bus tie switch group 10 is fed back to the control terminal. The control terminal can send a control instruction according to the opening and closing state of the electric control bus coupler, thereby improving the safety of the control process.

In one embodiment, the output interface 310 includes a first output interface 311 and a second output interface 312 . The first output interface 311 is connected in series with the power supply assembly 20 and the first coil 131 respectively to form a closed loop. The second output interface 312 is connected in series with the power supply assembly 20 and the second coil 132 respectively to form a closed loop.

In one embodiment, the input interface 320 includes a first input interface 321 and a second input interface 322 . The first input interface 321 is connected in series with the first auxiliary contact 121 to form a closed circuit. The second input interface 322 is connected in series with the second auxiliary contact 122 to form a closed circuit.

The control device 30 is used to monitor the opening and closing state of the electric control bus tie switch group 10 in real time, and execute a control instruction for controlling the opening and closing action of the electric control bus tie switch group 10 . The first output interface 311 and the second output interface 312 of the control device 30 are switching output interfaces with built-in normally open relays. The first power supply device 210 is connected in series with the first output interface 311 for supplying power to the first coil 131 . The second power supply device 220 is connected in series with the second output interface 312 for supplying power to the second coil 132 . The first input interface 321 and the second input interface 322 are digital input interfaces, which are respectively connected in series with the first auxiliary contact 121 and the second auxiliary contact 122 to form a closed circuit, and are used to detect the The opening and closing states of the bus tie switch group 10 are electrically controlled. In one embodiment, the first output interface 311 and the second output interface 312 may be electrically connected to the coil terminal block 160 . The first input interface 321 and the second input interface 322 may be electrically connected to the auxiliary contact terminal block 150 .

In one embodiment, the control device 30 includes a communication device 330 . The communication device 330 is used for communicating with the control terminal. The control device 30 has two RS232/485 communication interfaces for data exchange with the control terminal.

Please also refer to FIG. 7 , the present application provides a control method for an electronically controlled bus tie switch system. The control method of the electric control bus tie switch system includes S10, the control device 30 receives a control instruction. S20, the control device 30 detects the opening and closing state of the electric control bus tie switch group 10. S30, according to the control instruction, the control device 30 judges whether the opening and closing state of the electric control bus tie switch group 10 is normal. S40, the control device 30 controls switching of the electric control bus tie switch group 10 according to the opening and closing state of the electric control bus tie switch group 10 and the abnormal discharge signal.

In the step S10, the bus tie switch state monitoring module in the control device 30 receives a control command from the control terminal. The bus tie switch status monitoring module can communicate with the control terminal through the communication device 330 via RS232/485 serial port. It can be understood that the communication manner is not limited. Before executing the control instruction, the control device 30 may first judge whether the content of the control instruction is correct. When there are garbled characters in the control instruction, the control device 30 may feed back to the control terminal and request to resend the control instruction.

In the step S20 , the control device 30 detects the opening and closing states of the electric control bus tie switch group 10 . Since the auxiliary contact 120 is linked with the main contact 110 , the opening and closing state of the main contact 110 can be further judged according to the opening and closing state of the auxiliary contact 120 . It can be understood that the opening and closing states of the first main contact 111 and the second main contact 112 of the electric control bus tie breaker set 10 are the opening and closing states of the electric control bus tie breaker set 10 . After the detection of the opening and closing state of the electronically controlled bus tie switch group 10 is completed, the opening and closing state information can be fed back to the remote terminal for further control decisions.

In the step S30, according to the control instruction, the control device 30 judges whether the opening and closing state of the electric control bus tie switch group 10 is normal, that is, starts the initial state detection of the electric control bus tie switch group 10 process. When the control instruction is to close the electric control bus tie switch group 10, when the first main contact 111 and the second main contact 112 of the electric control bus tie switch group 10 are in an open state for normal conditions. When the control instruction is to disconnect the electric control bus tie switch group 10, when the first main contact 111 and the second main contact 112 of the electric control bus tie switch group 10 are in the closed state for normal conditions.

In the step S40, when the opening and closing state of the electric control bus tie switch group 10 is normal, the detection data may be fed back to the control terminal, and an abnormal discharge signal is waited for. When there is an abnormal discharge, the control terminal sends a control command to close the electric control bus tie switch group 10, and the control device 30 drives the The electric control bus tie switch group 10 is closed. When an abnormal discharge occurs, the control terminal sends a control command to disconnect the electric control bus tie switch group 10, and the control device 30 drives through the first output interface 311 and the second output interface 312 according to the control command. The electric control bus tie switch group 10 is disconnected. When the opening and closing state of the electric control bus tie switch group 10 is abnormal, the detection data can be fed back to the control terminal, and further decisions can be made through the remote terminal.

When abnormal discharge occurs in the double-battery and double-charge DC power supply system, the control terminal sends a control command to close the electric control bus tie switch group 10 . The control device 30 immediately controls the electric control bus tie switch group 10 to change from the normally open state to the closed state. When the abnormal condition of charging and discharging is eliminated, the control device 30 drives the electric control bus tie switch group 10 from closed to normally open state. The electronically controlled bus tie switch system control method provided by the application can effectively solve the problems of automatic battery discharge and bus tie switch automatic control in a substation dual-power double-charge DC power supply system. The control method of the electronically controlled bus tie switch system ensures the safety and reliability of the automatic discharge of the storage battery of the DC power supply system, and improves the automation and intelligence level of the DC power supply system of the substation.

Please refer to FIG. 8 together. In one embodiment, the step of the control device 30 detecting the opening and closing state of the electric control bus tie breaker set 10 includes S210, the opening and closing of the electric control bus tie breaker set 10 The state is encoded in combination. S220, the control device 30 acquires the state code of the electric control bus tie switch group 10 .

In one embodiment, in the step of combining and coding the opening and closing states of the electric control bus tie switch group 10, the way of the combination coding is: the first main contact 111 and the second main contact 111 The closed state code of the two main contacts 112 is '0', the open state code is '1', and the high-order code of the combined code is the first main contact 111 or the second main The open-close state of the contact 112, the low-order code is the open-close state of the first main contact 111 or the second main contact 112 provided on the negative bus.

Define the combination state coding method of the electric control bus tie switch group 10 on the positive and negative DC bus. The high-order code is the state code of the two parallel-connected DC contactors 102 on the positive DC bus, and the low-order code is the state code of the two parallel-connected DC contactors 102 on the negative DC bus. As long as one of the two DC contactors 102 connected in parallel is turned on, it can be considered that the two bus sections are connected. The opening and closing state coding group of the electric control bus tie switch group 10 is a combination of the high and low state codes. Encoding the switching value of the electric control bus tie switch group 10, when the state of all the parallel connected DC contactors 102 in the electric control bus tie switch group 10 is "0", that is, the electric control bus tie switch group 10 When the state of the group 10 is "00", the electric control bus tie switch group 10 is in the closed state. On the contrary, when the state of all the parallel-connected DC contactors 102 in the electric control bus tie switch group 10 is "1", that is, when the state of the electric control bus tie switch group 10 is "11", the electric The control bus tie switch group 10 is in the disconnected state. It can be understood that the opening and closing states of the first main contact 111 and the second main contact 112 are the opening and closing states of the DC contactor 102 .

In one embodiment, the step of controlling the switching of the electronically controlled bus tie switch group 10 by the control device 30 according to the opening and closing state of the electric control bus tie switch group 10 and the abnormal discharge signal includes S410 , when the state of the electronically controlled bus tie switch group 10 is normal, and the control device 30 receives a control signal to shut down the electronically controlled bus tie switch group 10 due to an abnormal discharge or the abnormal situation is lifted to disconnect the electronically controlled bus tie switch group After the control signal of group 10, the control device 30 feeds back normal information, and drives the switching of the electric control bus tie switch group 10. S420, when the state of the electric control bus tie switch group 10 is abnormal, the control device 30 feeds back abnormal information.

In one embodiment, before the step of the control device 30 detecting the opening and closing state of the electric control bus tie switch group 10 , S02 is included, the control device 30 detects the output state of the power supply assembly 20 .

When the control command is valid, the control device 30 can detect the output voltage of the power supply assembly 20 through the first output interface 311 and the second output interface 312 . When the output state of the power supply assembly 20 and the state of the electric control bus tie switch group 10 are both normal, actions can be performed according to different control instructions. Otherwise, feed back the detection data to the control terminal, and make further decisions through the control terminal. Through the step S02, the safety of the use process of the electric control bus tie switch system 100 can be further improved.

When the output voltage of the power supply assembly 20 is normal and the opening and closing state of the electric control bus tie switch group 10 is normal, the control device 30 executes the control command sent by the control terminal according to the abnormal discharge. If the control instruction is to close the electric control bus tie switch group 10, before executing the control instruction, the first coil 131 and the second coil 132 of the electric control bus tie switch group 10 are disconnected, The first auxiliary contact 121 and the second auxiliary contact 122 are disconnected and at a high level, that is, the normal state of the electric control bus tie switch group 10 is disconnected, and the open state is "11". If the control instruction is to disconnect the electric control bus tie switch group 10, before executing the control instruction, the first coil 131 and the second coil 132 of the electric control bus tie switch group 10 are closed, The first auxiliary contact 121 and the second auxiliary contact 122 are closed and at low level, that is, the normal state of the electric control bus tie switch group 10 is closed, and the open state is "00".

In one embodiment, the control terminal sends a control command to close the electric control bus tie switch group 10 . The control device 30 acquires control instructions and detects the opening and closing states of the electric control bus tie switch group 10 . If the opening and closing state is abnormal, the control information will be fed back. If the opening and closing state is normal, wait for the control terminal to send a command instruction.

When abnormal discharge occurs in the dual-electricity and double-charge DC power supply system, the control terminal sends a control command to close the electronically controlled bus-tie switch group 10 to the control device 30 . The control device 30 closes the built-in normally open relay, thereby closing the first output interface 311 and the second output interface 312 . The power supply assembly 20 is connected to the loop of the first coil 131 and the second coil 132, and the electric control bus tie switch group 10 instantly pulls the first main contact 111 and the second main contact 112. The first auxiliary contact 121 and the second auxiliary contact 122 are closed at the same time and are at low level, that is, the electric control bus tie switch group 10 is closed, and the opening and closing state is "00". After executing the control instruction, the control device 30 detects the opening and closing states of the electric control bus tie switch group 10 . If the first auxiliary contact 121 and the second auxiliary contact 122 of the electric control bus tie switch set 10 are at high level, then the electric control bus tie switch set 10 is not closed. If the first auxiliary contact 121 and the second auxiliary contact 122 are at low level, then the electric control bus tie switch group 10 is closed. The control device 30 can feed back information to the control terminal for further actions.

When the abnormal situation is resolved, the control terminal sends a control command to the control device 30 to disconnect the electric control bus tie switch group 10 . The control device 30 disconnects the built-in normally open relay, thereby disconnecting the first output interface 311 and the second output interface 312 . The power supply assembly 20 connected in series with the first coil 131 and the second coil 132 is disconnected from the circuit. When the electric control bus tie switch group 10 loses power, the first main contact 111 and the second main contact 112 instantly return to the normally open state, and the opening and closing state is "11". After executing the control instruction, the control device 30 detects the opening and closing states of the electric control bus tie switch group 10 . If the first auxiliary contact 121 and the second auxiliary contact 122 of the electric control bus tie switch group 10 are at high level, then the electric control bus tie switch group 10 is disconnected completely. If the first auxiliary contact 121 and the second auxiliary contact 122 are at low level, then the electric control bus tie switch group 10 is not disconnected. The control device 30 can feed back information to the control terminal for further actions.

Please also refer to FIG. 9 , the present application provides an electric control bus tie switch system 100 . The electric control bus tie switch system 100 includes an electric control bus tie switch group 10 , a power supply assembly 20 , a control device 30 and a control terminal 40 . The power supply assembly 20 is used to provide power for the electric control bus tie switch group 10 . The control device 30 is electrically connected to the power supply assembly 20 . The control device 30 is used for controlling the switching of the electric control bus tie switch group 10 and detecting the opening and closing state of the electric control bus tie switch group 10 . The control terminal 40 communicates with the control device 30 . Wherein, the electric control bus tie switch group 10 is electrically connected to the power supply assembly 20 and the control device 30 respectively. The electric control bus tie switch system 100 also includes a manual mechanical bus tie switch 50, which is connected in parallel with the electric control bus tie switch group 10, and is used to provide manual control for the two bus sections.

Specifically, referring to Fig. 3-Fig. 4, the electric control bus tie switch system 100, the electric control bus tie switch group 10, the control terminal 40 and the manual mechanical bus tie switch and the components and The circuit may be any one provided in the foregoing embodiments corresponding to FIGS. 3-4 , and details are not repeated here.

The application solves the switching problem of the automatic discharge bus tie switch of the substation storage battery, and at the same time improves the safety and intelligence of the control process of the electric control bus tie switch group 10 . There is no need to manually switch the mechanical bus-tie switch on site, so that when the automatic discharge of one set of batteries in the dual-electricity and double-charge DC power supply system is abnormal, the electric control bus-tie switch set 10 is connected to another set of backup battery sets automatic operation problem.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of protection of the patent application should be based on the appended claims.

Claims (15)

1. a kind of automatically controlled bus connection switch system (100) characterized by comprising

Automatically controlled bus connection switch group (10)；

Power Supply Assembly (20), for providing power supply for the automatically controlled bus connection switch group (10)；And

Control device (30) is electrically connected with the Power Supply Assembly (20), for controlling the throwing of the automatically controlled bus connection switch group (10) It cuts, and detects the folding condition of the automatically controlled bus connection switch group (10)；

Wherein, the automatically controlled bus connection switch group (10) is electrically connected with the Power Supply Assembly (20) and the control device (30) respectively It connects.

2. automatically controlled bus connection switch system (100) according to claim 1, which is characterized in that the automatically controlled bus connection switch group (10) include:

First main contacts (111) and the second main contacts (112), the hand-machine for being respectively used to and being set on positive bus-bar and negative busbar Tool bus connection switch is in parallel；

First auxiliary contact (121) and the second auxiliary contact (122) are connected respectively with the control device (30) to be closed back Road；And

First coil (131) and the second coil (132), connect with the Power Supply Assembly (20) and the control device (30) respectively For closed circuit.

3. automatically controlled bus connection switch system (100) according to claim 2, which is characterized in that the automatically controlled bus connection switch group (10) further include:

Main contacts terminal block (140), first main contacts (111) and second main contacts (112) are set to the main touching Point terminal block (140)；

Auxiliary contact terminal block (150), first auxiliary contact (121) and second auxiliary contact (122) are set to institute State auxiliary contact terminal block (150)；And

Coil terminals arrange (160), and the first coil (131) and second coil (132) are set to the coil terminals row (160)。

4. automatically controlled bus connection switch system (100) according to claim 2, which is characterized in that the automatically controlled bus connection switch group (10) include:

Four D.C. contactors (102), each D.C. contactor (102) include a main contacts (110), an auxiliary contact (120) and a coil (130)；

Wherein, it is first main contacts (111), other two described main contacts (110) that two main contacts (110) are in parallel Parallel connection is second main contacts (112)；

Two auxiliary contact (120) in parallel are first auxiliary contact (121), other two described auxiliary contact (120) in parallel is second auxiliary contact (122)；And

Two coils (130) in parallel are the first coil (131), other two described coil (130) parallel connection is described Second coil (132).

5. automatically controlled bus connection switch system (100) according to claim 4, which is characterized in that the automatically controlled bus connection switch group (10) further include:

Shell (170), the D.C. contactor (102) are set in the accommodating chamber (172) that the shell (170) defines.

6. automatically controlled bus connection switch system (100) according to claim 2, which is characterized in that Power Supply Assembly (20) packet It includes:

First power supply unit (210) is connected respectively with the control device (30) and the first coil (131) to be closed back Road；And

Second power supply unit (220) is connected respectively with the control device (30) and second coil (132) to be closed back Road.

7. automatically controlled bus connection switch system (100) according to claim 2, which is characterized in that the control device (30) sets It is equipped with:

Output interface (310), after connecting with the Power Supply Assembly (20), respectively with the first coil (131) and described second Coil (132) series connection is closed circuit；And

Input interface (320) is connected respectively with first auxiliary contact (121) and second auxiliary contact (122) to close Close circuit.

8. automatically controlled bus connection switch system (100) according to claim 7, which is characterized in that output interface (310) packet It includes:

First output interface (311) is connected respectively with the Power Supply Assembly (20) and the first coil (131) to be closed back Road；And

Second output interface (312) is connected respectively with the Power Supply Assembly (20) and second coil (132) to be closed back Road.

9. automatically controlled bus connection switch system (100) according to claim 7, which is characterized in that input interface (320) packet It includes:

First input interface (321) is connected with first auxiliary contact (121) as closed circuit；And

Second input interface (322) is connected with second auxiliary contact (122) as closed circuit.

10. automatically controlled bus connection switch system (100) according to claim 1, which is characterized in that control device (30) packet It includes:

Communication device (330), for being communicated with controlling terminal.

11. a kind of automatically controlled bus connection switch system (100) characterized by comprising

Automatically controlled bus connection switch group (10)；

Power Supply Assembly (20), for providing power supply for the automatically controlled bus connection switch group (10)；

Control device (30) is electrically connected with the Power Supply Assembly (20), for controlling the throwing of the automatically controlled bus connection switch group (10) It cuts, and detects the folding condition of the automatically controlled bus connection switch group (10)；And

Controlling terminal (40), with the control device (30) communication connection；

Wherein, the automatically controlled bus connection switch group (10) is electrically connected with the Power Supply Assembly (20) and the control device (30) respectively It connects.

12. automatically controlled bus connection switch system (100) according to claim 11, which is characterized in that the Power Supply Assembly (20) For Switching Power Supply.

13. automatically controlled bus connection switch system (100) according to claim 11, which is characterized in that the control device (30) It including normally opened relay, is electrically connected with the Power Supply Assembly (20), is the automatically controlled mother for controlling the Power Supply Assembly (20) Join switching group (10) power supply.

14. automatically controlled bus connection switch system (100) according to claim 11, which is characterized in that the automatically controlled bus connection switch Group (10) includes multiple D.C. contactors (102), controls two sections of positive bus-bars respectively after the multiple D.C. contactor (102) is in parallel With the on-off of two sections of negative busbars.

15. automatically controlled bus connection switch system (100) according to claim 11, which is characterized in that further include armstrong's patent mother Connection switch (50), it is in parallel with automatically controlled bus connection switch group (10), it is manually controlled for being provided for two sections of buses.