Optimal configuration method for miniature synchronous phasor measurement unit of power distribution system
A technology for synchrophasor measurement and optimal configuration, applied in forecasting, instrumentation, data processing applications, etc., can solve problems such as poor state estimation accuracy, low computational efficiency, nonlinearity, etc. Effect
Active Publication Date: 2019-09-06
STATE GRID TIANJIN ELECTRIC POWER +2
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Problems solved by technology
However, the strong reliance on pseudo-measurements often leads to poor state estimation accuracy
Therefore, a certain number of real-time measurements must be configured. Considering the huge scale of the power distribution system, only a small number of measuring instruments can be installed under the condition of limited investment, but it is difficult to solve the problem that the optimal configuration of power distribution system measurement is discrete and nonlinear. , non-differentiable combinatorial optimization problems
At present, there are few studies on the micro-synchrophasor measurement unit of power distribution system, and the existing research mostly uses swarm intelligence algorithm to solve the problem, which has low calculation efficiency and is difficult to obtain high-quality configuration schemes.
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[0040] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:
[0041] A method for optimally configuring a miniature synchrophasor measuring unit in a power distribution system, comprising the following steps:
[0042] Step 1, using MSE as the standard state estimation accuracy evaluation index;
[0043] The optimal design criterion of the MSE is: let G -1 The trace is the smallest, f A :=trace(G -1 ), representing the mean square error of state estimation;
[0044] The state estimation objective function can only describe the fitting of the estimated value to the measured value. Due to the influence of measurement noise, the state estimation objective function cannot be used to evaluate the state estimation accuracy. The gain matrix G, also known as the Fisher Information Matrix (FIM), contains the system information obtained by measurement, and its inverse matrix G -1 is the state estimation error covar...
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The invention relates to an optimal configuration method for a miniature synchronous phasor measurement unit of a power distribution system. The method is technically characterized by comprising the following steps: step 1, taking MSE as a standard state estimation precision evaluation index; step 2, based on the standard state estimation precision evaluation index in the step 1, starting from anyconsistent system real state, with the minimum MSE as the target and the muPMU configuration number as the constraint, establishing a muPMU optimal configuration model of the power distribution system, and searching for a muPMU configuration scheme enabling the state estimation MSE to be minimum; and step 3, solving the muPMU optimal configuration model of the power distribution system in the step 2, and obtaining a final muPMU optimal configuration result. According to the invention, a high-quality feasible solution can be rapidly obtained by adopting a commercial solver, and a configurationscheme meeting engineering requirements is provided for planning operation personnel.
Description
technical field [0001] The invention belongs to the technical field of power system secondary planning, and relates to an optimal configuration method for a micro-synchrophasor measurement unit of a power distribution system, in particular to an optimal configuration method for a micro-synchrophasor measurement unit of a power distribution system. Background technique [0002] Many power outages at home and abroad in recent years have highlighted the insufficiency and even extreme vulnerability of the power system to various natural disasters and disturbance events. Building a resilient and resilient power grid has gradually become a national strategy for governments to develop. The power distribution system directly supplies power to users, and the lack of flexibility of the power distribution system will seriously threaten the reliable and continuous power supply of users. [0003] Real-time situational awareness is an important prerequisite for improving the flexibility o...
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IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 刘超王旭东苏彦卓梁栋邢云琪李治张新民刘伟杨扬熊光普冷旭田刁长莹王尚王诗惠贾宓王雅文董祺宋广彦姜彤高强伟
Owner STATE GRID TIANJIN ELECTRIC POWER