A reactive power adjustment method suitable for low-frequency oscillation auxiliary decision-making in power system
A low-frequency oscillation and power system technology, applied in the direction of reactive power adjustment/elimination/compensation, reactive power compensation, reduction/prevention of power oscillation, etc., can solve problems such as no quantifiable adjustment strategy
Active Publication Date: 2019-08-16
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology
However, in the specific implementation process, the adjustment of the operation mode depends more on the experience and attempts of the engineering personnel, and there is no set of systematic, quantifiable adjustment strategies for the actual power grid operation status, so the adjustment of the operation mode is also difficult. An instructive metric is urgently needed
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Embodiment 1
[0062] The invention of this example provides a reactive power adjustment method suitable for low-frequency oscillation auxiliary decision-making in power systems, and preliminary calculation and analysis of small disturbance stability;
[0063] pattern filtering;
[0064] Establish and solve reactive power adjustment optimization problems;
[0065] Auxiliary decision-making strategy table summary for reactive power adjustment.
[0066] The flow of this embodiment is as follows figure 1 shown, including:
[0067] (1) Preliminary calculation and analysis of small disturbance stability:
[0068] According to the given power grid topology, parameters of components such as lines and transformers, operating conditions of components such as generators and loads, DC transmission system parameters and reactive power compensation, voltages and phase angles of pivot points and balance points, power flow calculations are performed, Obtain the steady-state equilibrium point of the sys...
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The invention discloses a reactive adjustment method applicable to low-frequency oscillation aid decision of an electric system. The reactive adjustment method comprises: (1) acquiring an oscillation mode and machine set information according to the preliminary minor interference stable analysis; (2) setting a screening condition, and screening low-frequency oscillation modes; (3) establishing target functions and constraint conditions of all the screened low-frequency oscillation modes one by one, and resolving the optimization issue; and (4) collecting aid decision strategy lists for reactive adjustment, and guiding the planning and operation of the electric system. According to the technical scheme, the damp of the system is enhanced, and the low-frequency oscillation hazard by adjusting the reactive power output of a machine set.
Description
[0001] Technical field: [0002] The invention relates to the field of power system simulation analysis, and more specifically relates to a reactive power adjustment method suitable for decision-making aided by low-frequency oscillations in power systems. [0003] Background technique: [0004] With the gradual implementation of my country's west-to-east power transmission and large-scale networking projects, the improvement of the degree of interconnection is of great significance for solving the inversion of energy distribution and electricity demand in our country, and improving the efficiency and economy of power transmission. At the same time, the scale of the power grid continues to expand, the network structure is becoming more and more complex, and the constraints of environmental and economic factors make the operation of the power system closer to the limit conditions. In this case, the problem of low-frequency oscillation after the interconnection of large power grid...
Claims
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IPC IPC(8): H02J3/18H02J3/24
CPCY02E40/30
Inventor 刘涛叶小晖宋新立仲悟之吴国旸苏志达戴汉扬马世英侯俊贤宋墩文王毅董毅峰王晓彤杨学涛熊选文陈勇冯静刘燕嘉
Owner CHINA ELECTRIC POWER RES INST