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Comprehensive energy system dynamic state estimation method

A technology for integrated energy system and dynamic state estimation, applied in resources, calculations, instruments, etc., can solve problems such as inability to obtain dynamic process information of integrated energy system, lack of state forecast function, etc.

Pending Publication Date: 2020-11-06
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These methods cannot obtain the dynamic process information of the integrated energy system, and do not have the function of state prediction

Method used

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  • Comprehensive energy system dynamic state estimation method
  • Comprehensive energy system dynamic state estimation method
  • Comprehensive energy system dynamic state estimation method

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Embodiment Construction

[0062] Embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0063] The present invention provides a method for estimating the dynamic state of an integrated energy system, which specifically includes the following steps:

[0064] Step 1. Define the specific form of the state quantity x, determine the measurement quantity z of the integrated energy system, calculate the step size Δt, and form the forecast error variance matrix Q and the measurement error variance matrix R;

[0065] Step 2. Initialize variables. Set the iteration time t=0; set the forecast error variance and measurement error variance of the initial value of the state quantity.

[0066] Step 3. Form the system state transition matrix F according to the topological structure and component parameters of the integrated energy system and the power balance relationship between the gas turbine unit and the combined heat and power unit t and measurement matrix ...

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Abstract

The invention discloses a comprehensive energy system dynamic state estimation method, which comprises the steps of defining a state quantity specific form, determining a measurement quantity of a comprehensive energy system, calculating a step length, and forming a forecast error variance matrix and a measurement error variance matrix; forming a system state transition matrix and a measurement matrix according to the comprehensive energy system topological structure, the element parameters and the power balance relationship between the gas turbine unit and the combined heat and power generation unit; forecasting the state quantity according to the state transition matrix to obtain a forecast value and a forecast error variance matrix of the state quantity at the t + 1 moment; forming a t+ 1 moment measurement phasor, calculating a filtering gain, and calculating a t + 1 moment state quantity estimation value and an estimation error variance matrix; and judging whether calculation isfinished or not, outputting an estimation result, and otherwise, estimating the next moment.The dynamic process of the comprehensive energy system can be forecasted, and meanwhile, the state quantitycan be estimated, so that accurate dynamic information is obtained.

Description

technical field [0001] The invention relates to a dynamic state estimation method of an integrated energy system, belonging to the technical field of integrated energy system monitoring. Background technique [0002] With the increasingly severe environmental problems, the scale of utilization of new energy such as wind power and photovoltaics continues to expand. Due to the strong random volatility of new energy, the connection of large-scale new energy to the power grid will affect the safe and stable operation of the system to a certain extent. The flexible adjustment performance of the gas turbine and the complementary characteristics of the central heating network and the power system through the combined heat and power unit provide a new control method for the operation of the power system. Therefore, it is particularly important to monitor the operation status of the comprehensive energy system composed of the power system, natural gas network and central heating net...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/06393G06Q50/06
Inventor 陈亮贺伟丁宇李扬
Owner NANJING UNIV OF INFORMATION SCI & TECH
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