SVC Controller | List of Available Signals

At acquisition, the following signals are made available by the sensors:

• CMD12phase_TCR1_label: Firing pulse of the positive valve in the TCR inductive branch;
• CMD21phase_TCR1_label: Firing pulse of the negative valve in the TCR inductive branch;
• Iphase_TCR1_label: Current across the TCR inductive branch;
• STATE12phase_TCR1_label: State of the positive valve in the TCR inductive branch;
• STATE21phase_TCR1_label: State of the negative valve in the TCR inductive branch;
• VphaseTh_TCR1_label: Voltage across the valves in the TCR inductive branch;
• VCAPphase_TCR1_label: Voltage across the capacitor in the TCR inductive branch;

FAILSIGphase_TCR1_label

• CMD12phase_TSC1_label: Firing pulse of the positive valve in TSC capacitive branch no 1;
• CMD21phase_TSC1_label: Firing pulse of the negative valve in TSC capacitive branch no 1;
• Iphase_TSC1_label: Current across TSC capacitive branch no 1;
• STATE12phase_TSC1_label: State of the positive valve in TSC capacitive branch no 1;
• STATE21phase_TSC1_label: State of the negative valve in TSC capacitive branch no 1;
• VphaseTh_TSC1_label: Voltage across the valves in TSC capacitive branch no 1;
• VCAPphase_TSC1_label: Voltage across the capacitor in TSC capacitive branch no 1;

FAILSIGphase_TSC1_label

• CMD12phase_TSC2_label: Firing pulse of the positive valve in TSC capacitive branch no 2;
• CMD21phase_TSC2_label: Firing pulse of the negative valve in TSC capacitive branch no 2;
• Iphase_TSC2_label: Current across TSC capacitive branch no 2;
• STATE12phase_TSC2_label: State of positive valve in TSC capacitive branch no 2;
• STATE21phase_TSC2_label: State of negative valve in TSC capacitive branch no 2;
• VphaseTh_TSC2_label: Voltage across the valves in TSC capacitive branch no 2;
• VCAPphase_TSC2_label: Voltage across the capacitor in TSC capacitive branch no 2;

FAILSIGphase_TSC3_label

• CMD12phase_TSC3_label: Firing pulse of the positive valve in TSC capacitive branch no 3
• CMD21phase_TSC3_label: Firing pulse of the negative valve in TSC capacitive branch no 3;
• Iphase_TSC3_label: Current across TSC capacitive branch no 3;
• STATE12phase_TSC3_label: State of positive valve in TSC capacitive branch no 3;
• STATE21phase_TSC3_label: State of negative valve in TSC capacitive branch no 3;
• VphaseTh_TSC3_label: Voltage across the valves in TSC capacitive branch no 3;
• VCAPphase_TSC3_label: Voltage across the capacitor in TSC capacitive branch no 3;

FAILSIGphase_TSC3_label

• pulsePat_int_label: Signal containing the binary code representing the firing orders of the valves
• VSYNCphase_label: Voltage signal used by synchronization unit;
• DelayImpInt_ label: Firing delay (as a fraction of calculation step) calculated by the internal command of the static compensator
• DelayImpExt_ label: Firing delay (as a fraction of calculation step) calculated by an external command of the static compensator
• DelayImp_ label: Firing delay (as a fraction of calculation step) sent to the static compensator
• DelayImpUsed_ label: Firing delay (as a fraction of calculation step) used by the static compensator
• V_Ref_label: Voltage reference for the controller;
• B_Ref_label: Susceptance reference for the controller;
• Slope_label: Slope of the controller;
• Deblocked_label: Signal specifying that the firing pulses are blocked or not.
• TCC_Mode_label: Signal specifying that the TCC mode is enabled or disabled
• ManualMode_label: Signal specifying that the manual mode is enabled or disabled
• Period_label: Period of the network (inverse of the frequency)
• Frequency_label: Network frequency
• Alpha_TCR1_label: Firing angle of the TCR inductive branch
• wtphase_label: Phase angle of synchronization voltages
• V_Prim_label: Voltage measured by the system
• V_Error_label: Input of PI regulator of regulation unit
• B_SVC_label: Susceptance seen from primary side of transformer
• B_TSC_label: Capacitive susceptance required
• B_TCR_label: Inductive susceptance required

Static Compensator Control Panel
Figures 11 - 23 to 11 - 25 show respectively the first, second and third pages of the static compensator control panel.

Figure 11 - 26 shows the network used in this example. The test consists in applying a rising ramp from 0.75 to 1.25 pu to the source voltage.

Then a positive sequence reading is taken of the voltage on the transformer primary and of the current in the Rprim resistance to drawthe U-I dynamic curve of the system. The variation of the source voltage is done as a ramp over 10 seconds.

The following parameters are used:

• Static Compensator: Fault parameters, automatic mode at Vref = 1.0 pu
• Network at 735 kV, short-circuit power of 6000 MVA, quality factor of 10
• Transformer YD 735/16 kV, 333 MVA, leakage of 15%
• Load on primary = 200 MW
• Load on secondary = 500 kW

U-I Dynamic Curve of the Static Compensator