A Robust State Estimation Method for Electric-Heat Interconnected Integrated Energy System Based on Pseudo-Measurement Model

A technology for comprehensive energy system and robust state estimation, applied in the field of analysis and control, and power system monitoring, can solve the problems of lack of thermal power measurement and unobservable system

Active Publication Date: 2020-11-03
HOHAI UNIV
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Problems solved by technology

Moreover, there is a lack of measurement of thermal power in the actual measurement system, which causes many key measurements in the state estimation model. Once the transmission of key measurement data fails, the system will be unobservable

Method used

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  • A Robust State Estimation Method for Electric-Heat Interconnected Integrated Energy System Based on Pseudo-Measurement Model
  • A Robust State Estimation Method for Electric-Heat Interconnected Integrated Energy System Based on Pseudo-Measurement Model
  • A Robust State Estimation Method for Electric-Heat Interconnected Integrated Energy System Based on Pseudo-Measurement Model

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Embodiment Construction

[0054] This embodiment provides a method for estimating the tolerance state of an electric-thermal interconnected comprehensive energy system based on a pseudo-measurement model, such as figure 1 shown, including the following steps:

[0055] (1) Obtain the power grid information and heating network information of the electricity-heat interconnection integrated energy system respectively.

[0056] Among them, the obtained grid information includes: grid topology, branch parameter information, and generator parameter information; the heating network information includes: the length, diameter, roughness, impedance coefficient of each pipeline, and the thermoelectric ratio of coupling elements.

[0057] (2) Based on the grid information and heating network information, a state estimation model of the electricity-heat interconnection integrated energy system is established considering the equality constraints.

[0058] Among them, the established state estimation model of electri...

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Abstract

The invention discloses a method for estimating the tolerance state of an electric-thermal interconnected comprehensive energy system based on a pseudo-measurement model, including: (1) obtaining information information of the electric-thermal interconnected comprehensive energy system; (2) establishing consideration and equality constraints (3) Establish a pseudo-measurement model of heat load power based on BP neural network and conduct training; (4) Combine the filtered value of the state variable of the heat network at the last moment with the heat network Real-time measurement vectors are used for correlation analysis, and the analysis results are input into the trained thermal load power pseudo-measurement model to obtain power pseudo-measurement data of thermal load nodes; (5) The weighted minimum absolute value based on the original dual interior point method is adopted The method solves the state estimation model and obtains the estimated values ​​of state variables. The invention has effective resistance to bad data in the system, and obviously reduces the number of key measurements in the system, thereby ensuring the observability of the system.

Description

technical field [0001] The invention relates to the field of power system monitoring, analysis and control, in particular to a method for estimating the tolerance state of an electric-thermal interconnected comprehensive energy system based on a pseudo-measurement model. Background technique [0002] The power-heat interconnection integrated energy system not only meets the most common energy needs of users, but also improves the economic and environmental benefits of the energy system. It is also conducive to smoothing the output fluctuations of intermittent new energy and promoting the development of renewable energy. The online scheduling, control and optimization strategies of the system rely on complete and reliable real-time data support. Due to economic and technical reasons, the existing measurement data inevitably has noise and limited measurement points. Therefore, as one of the core functions of the energy management system, the state estimation technology is comm...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06G06N3/04G06N3/08
CPCG06Q10/0639G06Q50/06G06N3/084G06N3/044Y04S10/50
Inventor 臧海祥耿明昊卫志农孙国强黄蔓云陈胜
Owner HOHAI UNIV
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