CN211454332U

CN211454332U - Excitation system of two thermal controllers based on field bus

Info

Publication number: CN211454332U
Application number: CN201922474008.2U
Authority: CN
Inventors: 杜夕和
Original assignee: Nanjing Shengtu Electric Technology Co ltd
Current assignee: Nanjing Shengtu Electric Technology Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-08
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to the field of electric power technology, especially, relate to an excitation system of two hot controller controllers based on field bus, including first controller, second controller, rectification portion, demagnetization portion and field bus, first controller, second controller, rectification portion and demagnetization portion interconnect through field bus. The utility model adopts the wiring mode that the field bus interconnects the first controller, the second controller, the rectifying part and the de-excitation part, thereby greatly simplifying the connection circuit among all the parts and reducing the cable wiring cost; the utility model is provided with a first controller and a second controller which are mutually used as a hot standby, only one controller is a main controller at the same time, and the other controller is a hot standby controller; when the two controllers are in failure, the rectifying part and the de-excitation part can keep the original working state, so that the stable operation of the excitation system is ensured, and the stability of channel switching is improved.

Description

Excitation system of two thermal controllers based on field bus

Technical Field

The utility model relates to an electric power tech field especially relates to an excitation system of two hot controller based on field bus.

Background

The utility model discloses the application relates to excitation system technical field specifically is an excitation system based on field bus network deployment is connected, two hot controller. The existing excitation system is mostly finished by connecting a main branch control controller, a rectifier module and a de-excitation module step by step, so that the connection among all parts is complex, the cable wiring is more, and the channel switching is unstable. The excitation system is used as an important device of the generator system, and if the excitation system does not have high reliability, the operation of the generator is influenced, and economic loss is caused to users.

SUMMERY OF THE UTILITY MODEL

To the technical problem that above-mentioned prior art exists, the utility model provides a connect simple, the passageway switches stably, the reliable excitation system based on two hot controller of field bus of operation.

In order to achieve the technical purpose, the utility model adopts the following technical scheme:

an excitation system of two hot standby controllers based on a field bus comprises a first controller, a second controller, a rectifying part, a field suppression part and the field bus, wherein the first controller, the second controller, the rectifying part and the field suppression part are connected with each other through the field bus; the first controller and the second controller are mutually master-slave hot standby, and when the second controller is a master controller, the second controller sends a control command to the rectifying part and the field suppression part through a field bus and transmits the control command to the rectifying part and the field suppression part; the rectifying part receives the control commands sent by the first controller and the second controller through a field bus; and the field suppression part receives the control commands sent by the first controller and the second controller through a field bus.

Further, the first controller, the second controller, the rectifying part and the de-excitation part are connected in parallel through a 2-core shielding twisted pair.

Furthermore, only one of the first controller and the second controller is a main controller at any time, and the main controller has a control right and a communication request right.

Further, the first controller and the second controller are master-slave hot standby.

Further, the first controller and the second controller communicate via a field bus.

Further, when the first controller is a master controller and a fault occurs, the second controller is automatically switched to the master controller and controls the rectifying part and the field suppression part after the second controller cannot track the control parameters of the first controller.

Further, when the second controller is a master controller and a fault occurs, the first controller automatically switches to the master controller and controls the rectifying part and the field suppression part after the first controller cannot track the control parameters of the second controller.

Further, when the first controller and the second controller simultaneously fail in the first control, the rectifying part and the de-excitation part continue to execute the work of the latest control instruction.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model adopts the wiring mode that the field bus interconnects the first controller, the second controller, the rectifying part and the de-excitation part, thereby greatly simplifying the connection circuit among all the parts and reducing the cable wiring cost;

(2) the utility model is provided with a first controller and a second controller which are mutually used as a hot standby, only one controller is a main controller at the same time, and the other controller is a hot standby controller; when the first controller and the second controller both have faults, the rectifying part and the de-excitation part can keep the original working state, so that the stable operation of the excitation system is ensured, and the stability of channel switching is improved.

Drawings

Fig. 1 is a schematic diagram of a field bus-based excitation system of two thermal controllers;

fig. 2 is a principal and subordinate switching schematic diagram of the two thermal controllers of the present invention;

FIG. 3 is a schematic diagram of the two thermal controller control enablement of the present invention;

description of the drawings: 110. a first controller; 120. a second controller; 130. a rectifying section; 140. a demagnetization section; 210. a first controller failure; 220. a second controller failure; 310. a first controller is enabled; 320. the second controller is enabled.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.

As shown in fig. 1, the present invention includes a first controller 110, a second controller 120, a rectifying part 130, a field suppression part 140 and a field bus, and is characterized in that the first controller 110, the second controller 120, the rectifying part 130 and the field suppression part 140 are connected with each other through the field bus, the first controller 110 is used for collecting external unit state, analog quantity and electric quantity information and performing analysis operation, and when determining that the controller is a main controller, the first controller sends a control command to the rectifying part 130 and the field suppression part 140 through the field bus; the second controller 120 is configured to collect information of external unit states, analog quantities, and electrical quantities, perform analysis and calculation, and send a control instruction to the rectifying unit 130 and the field suppression unit 140 through the fieldbus when determining that the second controller is the main controller; the rectifying unit 130 receives control commands sent by the first controller 110 and the second controller 120 through a field bus to perform work operation; the field suppression part 140 receives control instructions sent by the first controller 110 and the second controller 120 through a field bus to perform work operation; the first controller 110 and the second controller 120 are mutually master-slave hot standby, when the first controller 110 is a master controller, the second controller 120 keeps the control working conditions between the two controllers consistent by tracking the control parameters of the first controller 110, and when the second controller 120 is a master controller, the first controller 110 keeps the control working conditions between the two controllers consistent by tracking the control parameters of the first controller 110.

It is noted that the first controller 110, the second controller 120, the rectifying part 130 and the field suppression part 140 are connected in parallel by a 2-core shielded twisted pair. Only one of the first controller 110 and the second controller 120 is a master controller at any one time, and the master controller has a control right and a communication request right. The first controller 110 and the second controller 120 are master-slave hot standby. The first controller 110 and the second controller 120 communicate via a fieldbus. When the first controller 110 is a master controller and a fault occurs, the second controller 120 receives fault information of the first controller 110 and then automatically switches to the master controller to control the rectifying part 130 and the field suppression part 140. When the second controller 120 is a master controller and has a fault, the first controller 110 receives fault information of the second controller 120 and then automatically switches to the master controller to control the rectifying unit 130 and the field suppression unit 140. When the first controller 110 and the second controller 120 simultaneously fail, the rectifying part 130 and the de-magnetizing part 140 continue to maintain the operating state according to the latest control command received.

As shown in fig. 2 and fig. 3, the first controller 110 and the second controller 120 of the present invention adopt a master-slave switching principle: when the transfer switch QK1 is set to the manual position 1, the RLY3 relay is always powered on, and the second controller 120 obtains the control right; when the transfer switch QK1 is set to the manual position 2, the RLY3 relay is not powered all the time, and the first controller 110 obtains the control right, as shown in FIG. 3; when the change-over switch QK1 is set at automatic position 3, when the first controller 110 is abnormal or loses power, the first controller fault 210 signal is output to make the RLY1 relay act, and under the normal condition of the second controller 120, the RLY3 relay is powered on, and the second controller 120 obtains the control right.

Similarly, when the transfer switch QK1 is set to automatic position 3, and the second controller 120 is abnormal or loses power, the second controller fault 220 signal is output to operate the RLY2 relay, and when the first controller 110 is normal, the RLY3 relay loses power, and the first controller 110 obtains the control right.

The transfer switch QK1 is set to automatic position 3, and when the first controller 110 is the master controller, the slave second controller 120 cannot track the control command and parameter sent by the master first controller 110 for a while, and then switches itself to the master controller.

Similarly, when the transfer switch QK1 is set to automatic position 3, and the second controller 120 is the master controller, the slave controller 110 cannot track the control command and parameters sent by the master second controller 120 for a while, and then switches itself to the master controller.

As can be seen from the above embodiments, only one of the first controller 110 and the second controller 120 is a master controller at any time, and has control right to initiate a communication request to the fieldbus. If the first controller 110 is abnormal, the second controller 120 takes over the instruction control work; if the second controller 120 is abnormal, the first controller 110 takes over the instruction control work; if the first controller 110 and the second controller 120 are abnormal, the rectifying unit 130 and the de-excitation unit 140 keep the original operating state of the excitation system according to the latest command obtained before the failure. The utility model simplifies the complexity of the excitation system and reduces the connecting cables; the two hot standby controllers are mutually master and slave, have manual and automatic switching functions, are stable and reliable in switching, and ensure the equipment safety of the excitation system.

The above description is only the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all the modifications and changes made by the present invention or directly or indirectly applied to other related technical fields are also included in the scope of the present invention.

Claims

1. An excitation system of two thermal controllers based on a field bus, comprising a first controller (110), a second controller (120), a rectifying part (130), a de-excitation part (140) and the field bus, characterized in that the first controller (110), the second controller (120), the rectifying part (130) and the de-excitation part (140) are connected with each other through the field bus, and the first controller (110) and the second controller (120) communicate through the field bus;

the first controller (110) and the second controller (120) are mutually master-slave hot standby, and when the first controller is a master controller, the first controller sends a control command to the rectifying part and the demagnetizing part through a field bus; when the second controller is a main controller, the second controller sends a control command to the rectifying part and the field suppression part through the field bus and transmits the control command to the rectifying part and the field suppression part; the rectifying unit receives the control commands sent by the first controller and the second controller via a field bus.

2. The fieldbus-based excitation system of two thermal controllers as set forth in claim 1, wherein the first controller (110), the second controller (120), the rectifying section (130), and the field suppression section (140) are connected in parallel by a 2-core shielded twisted pair.

3. The field bus based excitation system of two thermal controllers according to claim 1, wherein the first controller (110) and the second controller (120) have only one master controller having control right and communication request right at any one time.

4. The fieldbus-based excitation system of two hot controllers as claimed in claim 1, wherein the first controller (110) and the second controller (120) are in master-slave hot standby with each other.