Power oscillation judging device
A technology of power oscillation and judging device, applied in the direction of reducing/preventing power oscillation, etc., can solve the problems that the low-frequency oscillation of the power grid is not easy to find and eliminate, and affects the safe and stable operation of the power system
Inactive Publication Date: 2015-03-04
ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD
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Problems solved by technology
[0003] The technical problem to be solved by the present invention is to provide a power oscillation judger to solve the problems that the low-frequency oscillation of the power grid is not easy to be discovered and eliminated in time, and the existing problems affect the safe and stable operation of the power system.
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[0029] A power oscillation judge, which includes (see figure 1 ):
[0030] The detection and alarm circuit of the rate of change in the rising direction uses the active power as the detected signal, detects and judges the rising rate of the detected signal within the detection period, and connects it with the rising range and rate overrun counter;
[0031] The detection and alarm circuit of the rate of change in the falling direction uses the active power as the detected signal, and detects and judges the falling rate of the detected signal within the detection period; it is connected to the falling range and rate overrun counter;
[0032] The range of change detection and alarm circuit uses the active power as the signal to be detected, and calculates and judges the range of change of each single rise or fall of the detected signal within the detection cycle, and automatically resets and restarts the next range of change after each overrun Calculation and judgment of exceed...
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The invention discloses a power oscillation judging device. The power oscillation judging device comprises an ascending direction change rate detection alarm loop, a descending direction change rate detection alarm loop, a change amplitude detection alarm loop, a rising amplitude and rate overrun counter, a descending amplitude and rate overrun counter, an oscillation judgment loop and an output loop, wherein the ascending direction change rate detection alarm loop is connected with the rising amplitude and rate overrun counter, the descending direction change rate detection alarm loop is connected with the descending amplitude and rate overrun counter, the change amplitude detection alarm loop is connected with the rising amplitude and rate overrun counter and the descending amplitude and rate overrun counter, the rising amplitude and rate overrun counter is connected with the oscillation judgment loop, the descending amplitude and rate overrun counter is connected with the oscillation judgment loop, and the oscillation judgment loop is connected with the output loop. With the power oscillation judging device of the invention adopted, problems such as a problem of influence on safe and stable operation of a power system which is caused by a situation in which low-frequency oscillation of a power grid is difficult to find and eliminate in time, can be solved.
Description
technical field [0001] The invention belongs to the grid frequency oscillation control technology, in particular to a power oscillation judger. Background technique [0002] In the process of power production, the safe and stable operation of the power grid and power supply (generator set) is the primary task that must be guaranteed in production. It is related to the reliability of power supply and the national economy and people's livelihood. The low-frequency oscillation of the power grid is one of the important factors that destroy the safe and stable operation of the power system. The low-frequency oscillation of the domestic regional power grid occurs almost every year, which has brought a relatively large negative impact on the power production process; the low-frequency oscillation of the regional power grid, A large part of it is caused by periodic low-frequency fluctuations in active power of generator sets on the power supply side due to various occasional reasons...
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IPC IPC(8): H02J3/24
Inventor 柏毅辉付宇张锐锋杨经武严惟震安波何洪流陈宇李前敏
Owner ELECTRIC POWER SCI RES INST OF GUIZHOU POWER GRID CO LTD