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Hyperbolic cosine maximum exponent square robust estimation method for power system state

A hyperbolic cosine and power system technology, applied in computing, data processing applications, instruments, etc., can solve problems such as estimation performance needs to be improved, and achieve good tolerance and high computing efficiency

Active Publication Date: 2019-05-03
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
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  • Claims
  • Application Information

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Problems solved by technology

However, the estimation performance of these robust state estimation methods still needs to be improved.

Method used

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  • Hyperbolic cosine maximum exponent square robust estimation method for power system state
  • Hyperbolic cosine maximum exponent square robust estimation method for power system state
  • Hyperbolic cosine maximum exponent square robust estimation method for power system state

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Experimental program
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Effect test

Embodiment

[0068] It is set to test the performance of COSH-MES based on primal-dual interior point algorithm by using IEEE standard system. The test adopts full measurement, and the measurement value is obtained by superimposing white noise (mean value is 0, standard deviation is τ) on the result of power flow calculation. For voltage measurement, take τ V =0.005p.u.; for power measurement, take τ PQ = 1MW / MVar. The test environment is a PC, the CPU is Intel(R) Core(TM) i3M370, the main frequency is 2.40GHz, and the memory is 2.00GB.

[0069] 1. Comparison of tolerance performance

[0070] The inventors compared COSH-MES of the present invention with other state estimators to test the robustness of COSH-MES.

[0071] Set 4 bad consistency data on IEEE-14 system (P 1-2 , Q 1-2 ,P 1 , Q 1 ). Table 1 shows the set bad measurement value and the correct value of measurement.

[0072] Table 1 COSH-MES identification of poor consistency data of IEEE 14 system

[0073]

[0074] As...

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Abstract

The invention discloses a method for hyperbolic cosine maximum exponential square robust estimation of a power system state. The method is based on hyperbolic cosine maximum exponential square robust state estimation (COSH-MES) with high robustness and calculation efficiency. The method comprises the following steps: step A, extracting power system node injection active power and reactive power, branch active power and reactive power, and node voltage amplitude parameters, and building a COSH-MES model from the above parameters; and step B, using a primal-dual interior point algorithm to solve the COSH-MES model. The method effectively inhibits multiple adverse data including inconsistent data, shows good robustness and high calculation efficiency, and thus can be widely used.

Description

technical field [0001] The invention belongs to the field of power system scheduling automation. In particular, it relates to a hyperbolic cosine type maximum exponential square robust estimation method for the state of a power system. Background technique [0002] Power system state estimation is the foundation and core of energy management systems. Now almost every large dispatch center has installed a state estimator, and state estimation has become the cornerstone of the safe operation of the power grid. Since state estimation was first proposed by foreign scholars in 1970, people have studied and applied state estimation for more than 40 years, and various state estimation methods have emerged during this period. [0003] At present, the most widely used state estimation at home and abroad is the weighted least squares (WLS) method. The WLS model is simple and easy to solve, but its robustness is poor. In order to enhance the tolerance, there are generally two metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/06
Inventor 陈艳波张籍晋文杰马进谢瀚阳刘洋
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)