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New-energy power plant model error positioning method and device

A model error and new energy technology, which is applied in the field of new energy power plant model error positioning methods and devices, can solve the problem of less configuration of PMUs, low voltage level of access points of wind farms and photovoltaic power stations, and is not suitable for verification of wind farms and photovoltaic power stations. Problems such as power station model, to achieve the effect of universality, easy to grasp and use, and clear physical concept

Inactive Publication Date: 2017-08-18
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology

[0005] According to the research results of literature and patents, there is no method and application of the present invention at home and abroad. What is more relevant is the invention patent of "Power System Model Checking Method and System Based on Hybrid Dynamic Simulation" applied by Wu Wenchuan and Zhang Boming of Tsinghua University in 2009 However, this patent is directly based on the measured data of the PMU to equalize the external power grid, but the voltage level (35kV or 110kV) of the access point of the wind farm and photovoltaic power station in the actual project is generally not high, and the PMU is rarely configured, so this patent is not applicable to Validate wind farm and photovoltaic plant models

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  • New-energy power plant model error positioning method and device

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Embodiment 1

[0046] The invention provides a new energy power station model error positioning method based on mixed data simulation. The method first obtains the measured voltage, frequency, active power and reactive power amplitude of the grid-connected points of the wind farm and the photovoltaic power station, as well as the convergence points of each feeder The measured voltage, frequency, active power and reactive power amplitude; then use variable impedance combined with controlled AC voltage source or fast response generator to achieve dynamic and accurate equivalent to the external power grid; then calculate the active power of the grid connection point through digital simulation The power and reactive power values ​​are compared with the measured active power and reactive power values. If the error is within the allowable range (generally within 5%), it proves that the model of the wind farm and photovoltaic power station is accurate; Further, the measured equivalent point is furth...

Embodiment 2

[0077] figure 1 It is a schematic diagram of the new energy power plant model error positioning method based on mixed data simulation. The figure includes research system A and other parts of the system. Research system A provides mixed data simulation, and research system A is divided into subsystem A1 and other parts of system A. , subsystem A1 provides mixed data simulation, and subsystem A1 is divided into subsystem A1 and other parts of subsystem A1, subsystem A1 provides mixed data simulation, and so on, the system is divided into multiple subsystems.

[0078] figure 2It is a structural diagram of a wind farm access system calculation example, in which, this calculation example includes three feeders, namely feeder 1, feeder 2 and feeder 3; three groups of wind turbines, respectively: #1-11 wind turbines, #2- 11 wind turbines, #3-11 wind turbines, the #1-11 wind turbines are connected to the feeder 1, the #2-11 wind turbines are connected to the feeder 2, and the #3-11...

Embodiment 3

[0087] Based on the same inventive concept, the present invention also provides a new energy power station model error positioning device, which includes:

[0088] Carrier model building module: based on the measured data of new energy grid connection points, feeder collection points and dynamic reactive power compensation devices, it is used to establish the component carrier model of the equivalent external system;

[0089] Analysis model construction module: used to inject measured data into the component carrier model of the equivalent external system, and build a new energy power station model based on the model;

[0090] Acquisition module: used to simulate field disturbances and obtain simulation data of grid-connected points of wind farms and photovoltaic power stations under the disturbances;

[0091] Error position determination module: determine the deviation value according to the measured data and the simulation data, and calibrate the new energy power plant model...

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Abstract

The invention relates to a new-energy power plant model error positioning method and device. The method comprises steps of: establishing an element carrier model of an equivalent external system according to the measured data of a new-energy grid-connected point, a feeder collection point and a dynamic reactive power compensation device; injecting the measured data into the element carrier model of the equivalent external system and creating a new-energy power plant model according to the model; simulating field disturbance to obtain the simulation data of a wind power plant and the grid-connected point of a PV power station under the disturbance; determining a deviation value according to the measured data and the simulation data, and calibrating the new-energy power plant model according to the deviation value in order to determine the position of a parameter error source of the new-energy power plant model. The new-energy power plant model error positioning method and device can accurately and completely position the errors of the wind power plant and the PV power station model, avoid errors of external system modeling, and greatly reduce modeling workload.

Description

technical field [0001] The invention relates to the technical field of power system model verification, in particular to a new energy power station model error positioning method and device. Background technique [0002] The development of new energy has become the consensus and important means for all countries to deal with climate change, solve the energy crisis and promote energy conservation and emission reduction. By the end of 2016, my country's wind power grid-connected installed capacity reached 149 million kilowatts; solar photovoltaic grid-connected power generation installed capacity reached 77 million kilowatts, ranking first in the world. According to the national plan, by 2020, my country will build 9 10-million-kilowatt-level wind power bases and a batch of 10-million-kilowatt-level photovoltaic power generation bases, mainly located in the "three north" regions of North China, Northeast China, and Northwest China. Affected by wind and solar resources, the ou...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J3/18
CPCH02J3/1821H02J3/383H02J3/386H02J2203/20Y02E10/56Y02E10/76Y02E40/30
Inventor 赵大伟马进钱敏慧刘艳章朱凌志姜达军韩华玲张磊陈宁赵亮何洁琼于若英赫卫国陈梅丁杰吴福保周邺飞居蓉蓉胡东平江星星秦昊彭佩佩罗芳陆菲菲李广磊于芃
Owner CHINA ELECTRIC POWER RES INST
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