High-voltage STATCOM control platform for switching main and standby dual-control systems

A system switching and control platform technology, applied in flexible AC transmission systems, reactive power adjustment/elimination/compensation, etc., to reduce the difficulty and risk of debugging

Inactive Publication Date: 2019-08-09
NANCHANG INST OF TECH
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Abstract

The invention discloses a high-voltage STATCOM control platform for switching main and standby dual-control systems. The high-voltage STATCOM control platform comprises an A system FCK404-100 cabinet,an A system FCK401-100 cabinet, an A system FCK402-100 cabinet, a B system FCK404-100 cabinet, a B system FCK401-100 cabinet and a B system FCK402-100 cabinet. The A system FCK404-100 cabinet is connected with the A system FCK401-100 cabinet, the A system FCK402-100 cabinet, the B system FCK404-100 cabinet, an A phase FCK403-100 cabinet, a B phase FCK403-100 cabinet and a C phase FCK403-100 cabinet. The high-voltage STATCOM control platform for switching main and standby dual-control systems divides a single set of systems into two sets of A and B standby sub systems which are in mutual standby, and the two sets of systems are identical in architecture, so that the debugging difficulty and risk are reduced.

Application Domain

Flexible AC transmissionReactive power adjustment/elimination/compensation

Technology Topic

EngineeringControl system +1

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  • High-voltage STATCOM control platform for switching main and standby dual-control systems

Examples

  • Experimental program(2)

Example Embodiment

[0019] Example 1: Please refer to figure 1 , A high-voltage STATCOM control platform for switching between active and standby dual control systems, including system A FCK404-100 chassis, system A FCK401-100 chassis, system A FCK402-100 chassis, system B FCK404-100 chassis, and system B FCK401-100 Chassis, B system FCK402-100 chassis, of which, A system FCK404-100 chassis and B system FCK404-100 chassis are both active/standby switching chassis, which are mainly responsible for active/standby switching, that is, the two subsystems A and B each contain 1 main Standby switching cabinets, A system FCK401-100 cabinets and B system FCK401-100 cabinets are control protection cabinets, mainly responsible for sampling, opening in and out, control and protection functions; A and B subsystems each contain a set of control protection Chassis, A system FCK402-100 chassis and B system FCK402-100 chassis are both optical fiber transceiver chassis, mainly used for the control of the sub-modules (also called chain links) of high-voltage STATCOM; A and B subsystems each contain a set of valves Control the chassis, the signals A_OK and B_OK in the figure are the self-checking normal signals of the A system and the B system; A_ACT and B_ACT are the active status signals of the A system and the B system; if A_ACT is valid, it means that the A system is an active system, and The management B system is similar. The system has two modes of manual and automatic switching. In manual mode, given that the B system is valid, then B is valid. A_Trip and B_Trip signals are trip signals. If they cannot be switched, they will be tripped.
[0020] A system FCK404-100 chassis is connected to A system FCK401-100 chassis, A system FCK402-100 chassis, B system FCK404-100 chassis, A phase FCK403-100 chassis, B phase FCK403-100 chassis and C phase FCK403-100 chassis, The B system FCK404-100 chassis is also connected to the B system FCK401-100 chassis, the B system FCK402-100 chassis, the A phase FCK403-100 chassis, the B phase FCK403-100 chassis and the C phase FCK403-100 chassis, and the A system FCK401-100 chassis It is also connected to the FCK401-100 chassis of system B. System A FCK402-100 chassis includes phase A output, phase B output and phase C output. Phase A output is connected to phase A FCK403-100 chassis, phase B output is connected to phase B FCK403-100 chassis, and phase C is output. Connect the C-phase FCK403-100 chassis, the A-phase FCK403-100 chassis, the B-phase FCK403-100 chassis and the C-phase FCK403-100 chassis are all fiber optic transceiver chassis, which are mainly used for high-voltage STATCOM fiber optic transceiver. A and B dual subsystems share a set of fiber optic transceiver chassis. The self-check signal is used to indicate the working condition of the control and protection system itself, the normal self-check indicates that the valve control is working normally, and the self-check failure indicates that the control and protection system itself has a fault and request system switching.
[0021] Failure with external interface:
[0022] 1) FCK404 receiving coordination controller active system IEC60044-8 communication failure;
[0023] 2) FCK404 receiving angle current sampling and over-limit signal optical fiber communication failure;
[0024] 3) The backup system receives the data communication fiber channel failure of the active system (FCK401);
[0025] 4) The backup system receives the self-checking fiber channel failure of the active system (FCK404);
[0026] 5) The standby system receives the active signal from the active system, the fiber channel failure (FCK404);
[0027] Communication failure between chassis:
[0028] 1) FCK404 receives FCK401 communication failure;
[0029] 2) FCK401 receives FCK404 communication failure;
[0030] 3) FCK401 receiving FCK402 communication failure;
[0031] 4) FCK402 receives FCK401 communication failure;
[0032] 5) FCK402 receives FCK403 communication failure;
[0033] 6) FCK403 receives FCK402 communication failure;
[0034] 7) FCK403 main control board receiving fiber optic transceiver board communication failure;
[0035] Independent Fibre Channel failure:
[0036] 1) FCK401 receiving active signal fiber failure;
[0037] 2) FCK402 receiving active signal fiber failure;
[0038] 3) FCK402 receiving synchronization signal fiber failure;
[0039] 4) FCK402 receives carrier synchronization signal fiber failure;
[0040] 5) FCK403 receiving active signal fiber failure;
[0041] 6) FCK403 receiving synchronization signal fiber failure;
[0042] 7) FCK403 receiving emergency lock fiber failure;
[0043] 8) FCK404 receives FCK401, three-phase FCK402's self-check independent fiber channel failure;
[0044] 9) FCK404 receives FCK401, three-phase FCK402 and three-phase FCK403 trip independent fiber channel faults;
[0045] 10) FCK404 judges that it has received a synchronization signal failure;
[0046] The power module of the control cabinet is faulty:
[0047] 1) FCK404 has detected a failure of the power module of the control cabinet chassis;
[0048] 2) FCK404 detects that the binary input and output power module is faulty.

Example Embodiment

[0049] Embodiment 2, on the basis of embodiment 1, the A system FCK404-100 chassis of this design is equipped with a measuring unit, a switch-in and switch-out unit, and a system protection and interface unit. The system protection and interface unit are connected to the measuring unit and the switch respectively. In and out of the unit. The FCK404-100 case of system A and the FCK404-100 case of system B have the same structure. The A system FCK404-100 chassis and the B system FCK404-100 chassis detect the active/passive status of the A/B system, and determine their own operating status through mutual transmission of optical fibers. Each system detects its own state separately to confirm whether A_OK and B_OK are valid. Once A_OK is invalid, the self-check is considered abnormal. At this time, if B_OK is valid, switch to system B. If A_OK and B_OK are invalid at the same time, it will trip and stop.

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