A dual layer distributed asymmetric quantity of multiple redundant controller coordination system

Abstract

A double-layer distribution asymmetric quantity of multiple redundant controller cooperative system, including controller one, controller two, controller three, interface A, interface B, interface C on the controller one, interface D, interface E, interface F on the controller two, interface H, interface I, interface J on the controller three, still including PLC one, PLC two, PLC three, PLC four, interface K, interface L on the PLC one, interface M, interface N on the PLC two, interface K, interface L, interface M, interface N, interface O on the PLC three, interface P, interface Q, interface R, interface S, interface T on the PLC four, PLS one, PLS two are external control systems, interface U on the PLS one, interface V on the PLS two.

Description

I. Technical Field

[0001] This invention relates to the field of automatic control technology, and more specifically to a collaborative system of multiple redundant controllers with a dual-layer asymmetrical distribution. II. Background Technology

[0002] The original design of the main pump frequency converter in a third-generation nuclear power plant in my country adopted a dual-redundant controller, and the upper-level control system (PLS) also adopted a dual-redundant design, with a one-to-one correspondence between the two. Currently, domestically produced frequency converters under development use a triple-redundant controller. To solve the interface problem between the triple-redundant controller and the dual-redundant PLS in the frequency converter, this patent provides a method for the coordinated operation of multiple redundant controllers with an asymmetrical number of dual-layer distribution in a high-voltage frequency converter.

[0003] Currently, the domestic automation control field mainly uses multi-layer dual-redundant control systems. The triple-redundant dual-redundant system was first created in the nuclear power field for frequency converters. While further improving system reliability, it also avoids Siemens' patent restrictions on dual-redundant controllers. III. Summary of the Invention

[0004] The purpose of this invention is to provide a collaborative system for multiple redundant controllers with a dual-layer, asymmetrical distribution.

[0005] This invention includes the following: a collaborative system of multiple redundant controllers with a dual-layer asymmetric distribution, comprising controller one, controller two, and controller three. Controller one has interfaces A, B, and C; controller two has interfaces D, E, and F; and controller three has interfaces H, I, and J.

[0006] It also includes PLC 1, PLC 2, PLC 3, and PLC 4. PLC 1 has interfaces K and L, PLC 2 has interfaces M and N, PLC 3 has interfaces K, L, M, N, and O, and PLC 4 has interfaces P, Q, R, S, and T.

[0007] PLS1 and PLS2 are external control systems. PLS1 has an interface U and PLS2 has an interface V.

[0008] Connections are made between interfaces A, D, and H; connections are made between interfaces L and N.

[0009] Interfaces B and C on controller 1 are connected to interface L on PLC 3 and interface Q on PLC 4, respectively.

[0010] Interfaces E and F on controller 2 are connected to interface M on PLC 3 and interface R on PLC 4, respectively.

[0011] Interface I and interface J on controller three are connected to interface N on PLC three and interface S on PLC four, respectively.

[0012] Connect interface K on PLC 1 to interface M on PLC 2; connect interface M to interface K on PLC 3; connect interface K to interface P on PLC 4; connect interface P to interface K on PLC 1 via a network cable.

[0013] Interface O on PLC 3 connects to interface U on PLS 1, and interface T on PLC 4 connects to interface V on PLS 2.

[0014] Interfaces B and C on controller one are connected to interface L on PLC three and interface Q on PLC four via MODBUSRUT communication bus.

[0015] Interfaces E and F on controller 2 are connected to interface M63 on PLC 3 and interface R on PLC 4 via MODBUSRUT communication bus.

[0016] Interfaces I and J on controller 3 are connected to interface N on PLC 3 and interface S on PLC 4 via MODBUSRUT communication bus.

[0017] Interface O on PLC 3 uses PROFIBUS / USDP bus communication to connect to interface U on PLC 1.

[0018] The interface T on PLC 4 uses PROFIBUS / USDP bus communication to connect to the interface V on PLC 2.

[0019] Interfaces A, D, and H are connected via optical fiber.

[0020] Interfaces L and N are connected via optical fiber.

[0021] Interface K on PLC 1 is connected to interface M on PLC 2 via a network cable. Interface M is connected to interface K on PLC 3 via a network cable. Interface K is connected to interface P on PLC 4 via a network cable. Interface P is connected to interface K on PLC 1 via a network cable.

[0022] The significant advantage of this invention lies in the fact that, in the prior art, there is no discussion of a method for multi-layer collaborative operation of redundant controllers. The outstanding feature of redundant controllers is that their hardware and software control functions are completely identical. During operation, only one controller is in master control mode, while the others are in standby mode, ready to take over from a faulty system at any time, and requiring a sufficiently short switchover time. Furthermore, redundant controllers are all independent control units or control boards, communicating entirely with each other, rather than the collaborative operation between controllers on the same control board described in other patents. IV. Description of the attached drawings

[0023] Figure 1 A schematic diagram of a collaborative system with multiple redundant controllers of asymmetrically distributed, two-layer configuration;

[0024] In the diagram: Controller 1, Controller 2, Controller 3, PLC 1, PLC 2, PLC 3, PLC 4, PLC 5, PLC 6, PLC 4, PLS 1, PLS 2;

[0025] Interfaces A11, B12, C13, D21, E22, F23, H31, I32, J33, K41, L42, M51, N52, K61, L62, M63, N64, O65, P71, Q72, R73, S74, T75, U81, and V82. V. Detailed Implementation Methods

[0026] A collaborative system of multiple redundant controllers with a dual-layer asymmetric distribution includes controller 1, controller 2, and controller 3. Controller 1 has interfaces A11, B12, and C13; controller 2 has interfaces D21, E22, and F23; and controller 3 has interfaces H31, I32, and J33.

[0027] It also includes PLC 1-4, PLC 2-5, PLC 3-6, and PLC 4-7. PLC 1-4 has interfaces K41 and L42, PLC 2-5 has interfaces M51 and N52, PLC 3-6 has interfaces K61, L62, M63, N64, and O65, and PLC 4-7 has interfaces P71, Q72, R73, S74, and T75.

[0028] PLS-8 and PLS-9 are external upper-level control systems for the frequency converter. PLS-8 has an interface U81 and PLS-9 has an interface V82.

[0029] Interfaces A11, D21, and H31 are connected via optical fiber, as are interfaces L42 and N52.

[0030] Interfaces B12 and C13 on controller 1 are connected to interface L62 on PLC 36 and interface Q72 on PLC 47 via MODBUSRUT communication bus, respectively.

[0031] The interfaces E22 and F23 on controller 2 are connected to interface M63 on PLC 36 and interface R73 on PLC 47 via MODBUSRUT communication bus, respectively.

[0032] The interfaces I32 and J33 on controller 3 are connected to interface N64 on PLC 36 and interface S74 on PLC 47 via MODBUSRUT communication bus, respectively.

[0033] Interface K41 on PLC 14 is connected to interface M51 on PLC 25 via a network cable. Interface M51 is connected to interface K61 on PLC 36 via a network cable. Interface K61 is connected to interface P71 on PLC 47 via a network cable. Interface P71 is connected to interface K41 on PLC 14 via a network cable.

[0034] Interface L42 on PLC 14 is connected to interface N52 on PLC 25 via optical fiber;

[0035] Interface O65 on PLC 36 uses PROFIBUSDP bus communication to connect to interface U81 on PLS-8, and interface T75 on PLC 47 uses PROFIBUSDP bus communication to connect to interface V82 on PLS-9.

[0036] Controller 1, Controller 2, and Controller 3 are redundant with each other. One of them is the master controller, and the other two are backup controllers. Controller 1, Controller 2, and Controller 3 communicate with each other via optical fiber.

[0037] PLC 14, PLC 25, PLC 36, and PLC 47 are dual-redundant PLCs for the frequency converter. PLC 14 and PLC 25 are the PLC central processing units (CPUs), while PLC 36 and PLC 47 are remote I / O stations. They communicate via a ring network, ensuring uninterrupted communication even with a single point of failure. PLC 14 and PLC 25 have the same priority, with one serving as the master CPU and the other as the backup CPU, communicating via fiber optic cable. If the master CPU fails, the backup CPU will act as the new master CPU at the point of data interruption to continue process control. PLC 36 and PLC 47 are redundant. When communication between PLC 36 and the master controller is interrupted, the program logic switches to PLC 47 to communicate with the master controller, and vice versa. Switching between controllers only occurs when both PLC 36 and PLC 47 have interrupted communication with the master controller, thus reducing the number of controller switching operations and minimizing disruption to equipment operation.

Claims

1. A cooperative system of multiple redundant controllers with a dual-layer distributed asymmetric number, characterized in that: Including controller 1 (1), controller 2 (2), and controller 3 (3). Controller 1 (1) has interface A (11), interface B (12), and interface C (13). Controller 2 (2) has interface D (21), interface E (22), and interface F (23). Controller 3 (3) has interface H (31), interface I (32), and interface J (33). It also includes PLC 1 (4), PLC 2 (5), PLC 3 (6), and PLC 4 (7). PLC 1 (4) has interfaces K (41) and L (42). PLC 2 (5) has interfaces M (51) and N (52). PLC 3 (6) has interfaces K (61), L (62), M (63), N (64), and O (65). PLC 4 (7) has interfaces P (71), Q (72), R (73), S (74), and T (75). PLS-1 (8) and PLS-2 (9) are external control systems. PLS-1 (8) has an interface U (81) and PLS-2 (9) has an interface V (82). Interfaces A(11), D(21), and H(31) are connected to each other, and interfaces L(42) and N(52) are connected to each other. Interfaces B (12) and C (13) on controller 1 (1) are connected to interface L (62) on PLC 3 (6) and interface Q (72) on PLC 4 (7) respectively; Interfaces E (22) and F (23) on controller 2 are connected to interface M (63) on PLC 3 (6) and interface R (73) on PLC 4 (7), respectively. Interface I (32) and interface J (33) on controller three (3) are respectively connected to interface N (64) on PLC three (6) and interface S (74) on PLC four (7); Interface K (41) on PLC 1 (4) is connected to interface M (51) on PLC 2 (5), interface M (51) is connected to interface K (61) on PLC 3 (6); interface K (61) is connected to interface P (71) on PLC 4 (7); interface P (71) is connected to interface K (41) on PLC 1 (4) via a network cable; Interface O (65) on PLC 3 (6) is connected to interface U (81) on PLS 1 (8), and interface T (75) on PLC 4 (7) is connected to interface V (82) on PLS 2 (9); Interfaces B (12) and C (13) on controller 1 (1) are connected to interface L (62) on PLC 3 (6) and interface Q (72) on PLC 4 (7) via MODBUSRUT communication bus, respectively. Interfaces E(22) and F(23) on controller 2 (2) are connected to interface M(63) on PLC 3 (6) and interface R(73) on PLC 4 (7) via MODBUSRUT communication bus, respectively. Interfaces I (32) and J (33) on controller three (3) are connected to interface N (64) on PLC three (6) and interface S (74) on PLC four (7) via MODBUSRUT communication bus, respectively. The interface O(65) on PLC 3 (6) is connected to the interface U(81) on PLS 1 (8) via PROFIBUS P bus communication. The interface T(75) on PLC 4 (7) is connected to the interface V(82) on PLS 2 (9) via PROFIBUS P bus communication.

2. The collaborative system of multiple redundant controllers with a dual-layer distributed asymmetric number according to claim 1, characterized in that: Interfaces A (11), D (21), and H (31) are connected by optical fiber.

3. The collaborative system of multiple redundant controllers with a dual-layer distributed asymmetric number according to claim 1, characterized in that: Interface L(42) and interface N(52) are connected by optical fiber.

4. The collaborative system of multiple redundant controllers with a dual-layer distributed asymmetric number according to claim 1, characterized in that: Interface K(41) on PLC 1 (4) is connected to interface M(51) on PLC 2 (5) via a network cable. Interface M(51) is connected to interface K(61) on PLC 3 (6) via a network cable. Interface K(61) is connected to interface P(71) on PLC 4 (7) via a network cable. Interface P(71) is connected to interface K(41) on PLC 1 (4) via a network cable.

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