Section limit calculation and shedding amount information obtaining method of power transmission section
A technology of transmission section and acquisition method, which is applied in the direction of electrical components, circuit devices, AC network circuits, etc., can solve the problems of not considering the operation of the stability control device, the inability to change and adjust the stability control measures, and increasing the transmission point, so as to avoid Insufficient cutting quantity, expanding control margin, and increasing the effect of error prevention function
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Embodiment 1
[0050] A section limit calculation and slicable information acquisition method of a power transmission section, the schematic flow chart of which is shown in figure 1 Shown: Include the following steps:
[0051] S1. Dynamic detection of effective power system stability control measures;
[0052] S2. Judging whether the power system stability control measure condition is satisfied, if so, proceed to step S3, otherwise end the operation;
[0053] S3. Dynamic detection of effective cuttable components;
[0054] S4. Judging whether the condition of the cutable element is satisfied, if so, proceed to step S5, otherwise end the operation;
[0055] S5. Calculate the sensitivity of the cuttable element to the section;
[0056] S6. Judging whether the sensitivity of the cuttable element to the section is greater than the threshold value, if so, proceed to step S7, otherwise end the operation;
[0057] S7. Select key cuttable components;
[0058] S8. Detect the electrical quantity...
Embodiment 2
[0090] This example figure 2 Shown: There are three circuits of 500kV AC lines L1, L2, and L3 between area 1 and area 2, of which L1 and L2 are double-circuit lines on the same pole; in order to control the simultaneous tripping of L1 and L2, the power flow of L3 exceeds the overload limit after the accident , The risk of chain tripping occurs, {L1, L2, L3} constitutes the N-2 transmission section between area 1 and area 2, and the limit of the section is 3300MW.
[0091] Area 1 is equipped with stability control device A1, open line N-2 to switch unit function, the unit can be switched to G1, G2, G3, specifically: detect L1, L2, if the prior power sum of L1, L2 is greater than the threshold value Pmk, L1, When L2 trips, the stability control device calculates the cutting amount according to the relevant fixed value, and the action cuts off the G1, G2, and G3 units.
[0092] Area 2 is equipped with stabilizing device A2, and the function of line overload load shedding is ena...
Embodiment 3
[0116] If the stability control device does not collect the real-time electrical quantity of the cut-off unit or load or the real-time electrical quantity is wrongly uploaded, the following solutions can be adopted:
[0117] Read the SCADA value of the severable unit or load, compare and check with the estimated value of the state, and calculate the severable amount according to the following rules:
[0118] 1. The deviation between the severable SCADA value and the estimated state value is less than 2%, and the SCADA value is used as the real-time power flow of the severable unit or load to calculate the dynamic limit of the transmission section;
[0119]2. The deviation between the severable SCADA value and the estimated state value is between 2% and 5%. Take the SCADA value as the real-time power flow of the severable unit or load, calculate the dynamic limit of the transmission section, and issue an alarm message;
[0120] 3. If the deviation between the SCADA value of the...
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