An emergency control method for power supply and load that responds to load off-grid shocks and takes into account the adjustment capacity of the unit
A technology for regulating capacity and load, applied in the field of power supply and load emergency control, can solve problems such as the inability to meet the convergence requirements of control strategies, achieve significant economic and social benefits, improve operational reliability, and reduce the risk of grid voltage loss.
Active Publication Date: 2020-05-19
NARI TECH CO LTD +2
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Problems solved by technology
[0005] The purpose of the present invention is: in order to overcome the problem that in the prior art, taking equal cut-off unit and supplementary load-cut control measures according to the amount of lost load may lead to failure to meet the convergence requirements of the control strategy, a method to deal with load off-grid impact and take into account unit adjustment is proposed. Power supply and load emergency control method with high capacity, so that under the premise of fully calculating the adjustment capacity of the operating unit of the regional power grid, by accurately selecting the machine and load shedding objects, the control measures of the safety and stability control device are accurate and effective, and the regional power grid is guaranteed to be in the event of a failure. safe and stable operation after
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Embodiment 1
[0021] This embodiment is an emergency control method for power supply and load that responds to the impact of load off-grid and takes into account the adjustment capacity of the unit. The main steps are as follows: figure 1 shown.
[0022] figure 1 Step 1 in the above describes the real-time measurement and calculation of the active capacity of the generator set running in the regional power grid, and the active capacity of the fall, the specific process is as follows figure 2 As shown, that is, first real-time measurement of the operating active power P of each generating set in the regional power grid g_i , and calculate the maximum operating power P of each generator set according to the operating conditions of the generator set max_i , the minimum operating power P min_i and rated operating power P rated_i , the i in the subscript represents the serial number of each generator set, and then calculate the active capacity of each generator (represents the upper limit o...
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The invention discloses a power and load emergency control method for handling load off-net impact and having unit adjusting capacity, and belongs to the technical field of power systems and automation thereof. On the premise of fully calculating adjusting capacity of own power grid operation units of a power grid or large-scale industrial and mining enterprises, whether emergency control measures need to be taken or not is judged according to load loss amount, and unit switching and load object switching are accurately selected according to unit and load operation power when needed. It is ensured that the measures of a safety and stability control device are accurate and effective, operation reliability of the power grid in a fault or special mode is improved, and the power grid voltage loss risk is reduced.
Description
technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to an emergency control method for power supply and load that deals with the impact of load off-grid and takes into account the adjustment capability of the unit. Background technique [0002] At present, the grid structure of power grids in some areas or self-provided power grids of large factories and mines is relatively weak, and the spare capacity of the units in the grid is low. Operation mode of the isolated network. [0003] Therefore, for the above-mentioned self-contained power grid, in the isolated grid operation mode, due to the weak adjustment ability, there will be a large-capacity excess active power impact after a large load off-grid fault occurs in the grid, and even cause the grid to lose power. as a result of. Once the power grid loses power for a long time, the equipment will not work normally, result...
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IPC IPC(8): H02J3/14H02J3/24
CPCH02J3/001H02J3/14H02J3/24Y02B70/3225Y04S20/222
Inventor 刘天翼刘平罗剑波李雪明夏海峰朱磊卢军王古月
Owner NARI TECH CO LTD