A voltage control method, device and system for preventing new energy cascading failures
A voltage control method and cascading failure technology, which are applied to circuit devices, AC network voltage adjustment, and emergency treatment of AC circuit layout, etc. Efficiency and computational convergence, boost and voltage safe operating levels, effect of reduced risk
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Embodiment 1
[0038] Such as figure 1 and 2 As shown, the voltage control method for preventing new energy cascading failures provided by the embodiment of the present invention includes the following steps:
[0039] Step 1: Determine the expected accident set of new energy off-grid, evaluate the impact of the expected accident set on the regional bus voltage and calculate the deviation of the bus voltage limit value.
[0040] Specifically, based on the regional scanning of N-1 expected accidents by new energy plants and stations, the accident sets that have a greater impact on the voltage generated by the safe operation of new energy collection areas are determined; the impact of each fault in the accident set on the regional bus voltage can be understood It is: calculate the busbar voltage variation according to multiple rounds of single new energy plant and station forecast accidents, and evaluate the influence of the forecasted accident set on the lower limit deviation of the bus volta...
Embodiment 2
[0054] Such as image 3 As shown, the embodiment of the present invention provides a voltage control device for preventing cascading faults of new energy sources, including the following modules:
[0055] Deviation calculation module: determine the new energy off-grid expected accident set, evaluate the impact of the expected accident set on the regional bus voltage and calculate the bus voltage limit deviation;
[0056] Control decision-making module: Combined with the bus voltage limit deviation, the secondary voltage control correction is performed, and the secondary voltage control decision is obtained to perform regional voltage coordination control.
[0057] Specifically, the control decision-making module can be used to judge and decide whether each reactive power source in the area can be adjusted to avoid or reduce the voltage limit of the expected accident of new energy off-grid. If the regional calculation converges, the regional control decision is determined; if t...
Embodiment 3
[0059] An embodiment of the present invention provides a voltage control device for preventing new energy cascading failures, including a processor and a storage medium;
[0060] The storage medium is used to store instructions;
[0061] The processor is configured to operate according to the instructions to execute the steps of the voltage control method in the second embodiment.
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