Accurate load control method for coping with power source off-grid impact and calculating unit adjustment capability
A technology of regulation capability and load control, applied in the direction of AC network voltage adjustment, power network operating system integration, electrical components, etc., can solve the problem of unable to meet the control strategy convergence requirements, achieve significant economic and social benefits, reduce power grid voltage loss risk, the effect of improving operational reliability
Active Publication Date: 2017-12-26
NARI TECH CO LTD +2
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Problems solved by technology
[0005] The purpose of the present invention is: to overcome the problem that the equivalent load shedding control measures taken according to the amount of lost units in the prior art may not be able to meet the convergence requirements of the control strategy, and to propose a precise load response to the impact of power off-grid and taking into account the adjustment capacity of the unit Control method, so that under the premise of fully calculating the adjustment capacity of the operating units of the regional power grid, through the precise selection of load shedding objects, the control measures of the safety and stability control device are accurate and effective, and the safe and stable operation of the regional power grid after failure
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Embodiment 1
[0021] This embodiment is a precise load control method that copes with the impact of power off-grid and takes into account the adjustment ability 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 of the power that can be r...
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The invention discloses an accurate load control method for coping with power source off-grid impact and calculating unit adjustment capability, and belongs to the technical field of electrical power systems and automation thereof. According to the method, on the premise of sufficiently calculating adjustment capability of own power grid operation units of some regional power grids or large-scale industrial and mining enterprises, whether to take emergent control measures or not is judged according to loss of the units, and load shedding objects are selected accurately according to load operation power when it is needed. The accurate load control method has the advantages that accuracy and effectiveness of the control measures of safe and stable control devices are guaranteed, operation reliability of the power grids in a fault or special mode is improved, and no-voltage risks of the power grids are 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 a precise load control method for responding to the impact of power off-grid and taking into account the adjustment ability 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, due to the weak regulation ability in the isolated grid operation mode, there will be a large-capacity active power shortage impact after a unit off-grid fault occurs in the grid, and even cause the power grid to lose power. Once the power grid loses power for a long time, the equipment will not work normally, resulting in permanent damage to some key equ...
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Login to View More IPC IPC(8): H02J3/14H02J3/46
CPCH02J3/14H02J3/388H02J3/46Y02B70/3225Y04S20/222
Inventor 刘天翼刘平罗剑波李雪明夏海峰朱磊卢军魏灿
Owner NARI TECH CO LTD