CN-121984439-A - New energy photovoltaic power operation analysis system and method

CN121984439ACN 121984439 ACN121984439 ACN 121984439ACN-121984439-A

Abstract

The invention relates to the technical field of photovoltaic power and discloses a new energy photovoltaic power operation analysis system and a method, wherein a data acquisition module acquires a plurality of groups of operation state data of a photovoltaic power station, and combines each group of operation state data to obtain a plurality of operation state data sequences; the photovoltaic power station operation monitoring system comprises a first calculation module, a second calculation module, an operation analysis module, a quantification analysis module and a control module, wherein the first calculation module calculates operation state anomaly coefficients based on an operation state data sequence and data acquisition time, the second calculation module analyzes all operation state anomaly coefficients, calculates anomaly coefficient fluctuation values, calculates power operation anomaly metric values according to the anomaly coefficient fluctuation values, and analyzes power operation of the photovoltaic power station according to the relation between the power operation anomaly metric values and preset power operation anomaly metric values, quantifies fluctuation conditions of operation state data, comprehensively evaluates operation state anomaly degree of the photovoltaic power station, ensures anomaly analysis precision of the power operation, and improves stability and safety of the photovoltaic power station.

Inventors

XIE YU
Feng Xuhao
ZHU RONGKANG
ZHAO JUNLIN
YUAN XIN
ZHANG TAO

Assignees

华能陕西泾阳发电有限公司

Dates

Publication Date: 20260505
Application Date: 20251128

Claims (10)

1. The utility model provides a new forms of energy photovoltaic electric power operation analysis system which characterized in that includes: the data acquisition module is used for acquiring a plurality of groups of operation state data of the photovoltaic power station, and combining each group of operation state data to obtain a plurality of operation state data sequences, wherein each group of operation state data corresponds to one data acquisition time; The first calculation module is used for calculating the abnormal operation state coefficient of the photovoltaic power station based on the operation state data sequence and the data acquisition time; the second calculation module is used for analyzing all the abnormal coefficients of the operation state, calculating a plurality of abnormal coefficient fluctuation values of the photovoltaic power station based on analysis results, and calculating an abnormal power operation measurement value of the photovoltaic power station according to the abnormal coefficient fluctuation values; And the operation analysis module is used for presetting a preset power operation abnormal measurement value and analyzing the power operation of the photovoltaic power station according to the relation between the power operation abnormal measurement value and the preset power operation abnormal measurement value.
2. The new energy photovoltaic power operation analysis system of claim 1, wherein the first computing module is configured to: the first calculation module is used for calculating the abnormal coefficient of the overall operation state of the photovoltaic power station according to the operation state data corresponding to the first data acquisition time and the operation state data corresponding to the last data acquisition time; The first calculation module is used for calculating the abnormal coefficient of the fluctuation running state of the photovoltaic power station according to the residual running state data; the first calculation module is used for carrying out weighted summation on the integral operation state abnormal coefficient and the variable operation state abnormal coefficient to obtain the operation state abnormal coefficient of the photovoltaic power station.
3. The new energy photovoltaic power operation analysis system of claim 2, wherein the first computing module is configured to: The first calculation module is used for calculating the absolute value of the difference value of the running state data corresponding to the first data acquisition time and the running state data corresponding to the last data acquisition time as the running state data difference; The first calculation module is used for determining the time interval corresponding to the first data acquisition time and the last data acquisition time; The first calculation module is used for taking the ratio of the running state data difference to the time interval as an abnormal coefficient of the whole running state of the photovoltaic power station.
4. The new energy photovoltaic power operation analysis system of claim 2, wherein the first computing module is configured to: the first calculation module is used for extracting one piece of running state data from the rest of running state data to serve as standard running state data; The first calculation module is used for calculating the average value of all the running state data and determining a first difference absolute value of the standard running state data and the average value; the first calculation module is used for determining left side operation state data and right side operation state data of the standard operation state data; The first calculation module is used for determining a second difference absolute value of the standard running state data and the left running state data and determining a third difference absolute value of the standard running state data and the right running state data; The first calculation module is used for calculating the sum value of the second difference absolute value and the third difference absolute value; The first calculation module is used for determining standard data acquisition time corresponding to the standard running state data, determining left data acquisition time corresponding to the left running state data and determining right data acquisition time corresponding to the right running state data; The first calculation module is used for taking the time interval between the left data acquisition time and the standard data acquisition time as a first time interval and taking the time interval between the right data acquisition time and the standard data acquisition time as a second time interval; The first calculation module is used for calculating abnormal coefficients of the variable running states of the photovoltaic power station according to the first difference absolute value, the sum value, the first time interval and the second time interval.
5. The new energy photovoltaic power operation analysis system of claim 4, wherein the first computing module is configured to: the first calculation module is used for calculating abnormal coefficients of the variable running states of the photovoltaic power station according to the following formula: ; wherein s is a variable operation state anomaly coefficient of the photovoltaic power station, p1 is a first calculation coefficient, p2 is a second calculation coefficient, p3 is a third calculation coefficient, p1> p2> p3, p1+p2+p3=1, i1 is a first difference absolute value, i2 is a sum value, u1 is a first time interval, and u2 is a second time interval.
6. The new energy photovoltaic power operation analysis system of claim 1, wherein the second computing module is configured to: the second calculation module is used for combining every n operation state abnormal coefficients to obtain a plurality of operation state abnormal coefficient sets; the second calculation module is used for binding two running state abnormal coefficient sets and is used as a first running state abnormal coefficient set and a second running state abnormal coefficient set; the second calculation module is used for determining a first mean value and a first standard deviation of the first running state abnormal coefficient set; the second calculation module is used for determining a second mean value and a second standard deviation of the second running state abnormal coefficient set; The second calculation module is used for calculating an abnormal coefficient fluctuation value of the photovoltaic power station based on the first mean value, the first standard deviation, the second mean value and the second standard deviation.
7. The new energy photovoltaic power operation analysis system of claim 6, wherein the second computing module is configured to: The second calculation module is used for calculating the abnormal coefficient fluctuation value of the photovoltaic power station according to the following formula: ; wherein r is an abnormal coefficient fluctuation value of the photovoltaic power station, d1 is a first average value, d2 is a second average value, m1 is the number of abnormal coefficients of the operation state in the first abnormal coefficient set of the operation state, m2 is the number of abnormal coefficients of the operation state in the second abnormal coefficient set of the operation state, f1 is a first standard deviation, and f2 is a second standard deviation.
8. The new energy photovoltaic power operation analysis system of claim 1, wherein the second computing module is configured to: The second calculation module is used for performing curve fitting on all abnormal coefficient fluctuation values to obtain an abnormal coefficient fluctuation value curve; The second calculation module is used for extracting the maximum curve slope corresponding to the abnormal coefficient fluctuation value curve to be used as a mutation coefficient; the second calculation module is used for determining variances of all abnormal coefficient fluctuation values, and taking the product value of the variances and the abrupt change coefficient as an abnormal power operation measurement value of the photovoltaic power station.
9. The new energy photovoltaic power operation analysis system according to claim 1, wherein the operation analysis module is configured to: the operation analysis module is used for judging that the photovoltaic power station does not have power abnormal operation when the power operation abnormal measurement value is smaller than the preset power operation abnormal measurement value; And the operation analysis module is used for judging that the photovoltaic power station has power abnormal operation when the power operation abnormal measurement value is greater than or equal to the preset power operation abnormal measurement value.
10. A new energy photovoltaic power operation analysis method applied to the new energy photovoltaic power operation analysis system as set forth in any one of claims 1 to 9, comprising: acquiring multiple groups of operation state data of the photovoltaic power station, and combining each group of operation state data to obtain multiple operation state data sequences, wherein each group of operation state data corresponds to one data acquisition time; Calculating an operation state anomaly coefficient of the photovoltaic power station based on the operation state data sequence and the data acquisition time; Analyzing all the abnormal coefficients of the operation state, calculating a plurality of abnormal coefficient fluctuation values of the photovoltaic power station based on analysis results, and calculating an abnormal power operation measurement value of the photovoltaic power station according to the abnormal coefficient fluctuation values; and presetting a preset power operation abnormal measurement value, and analyzing the power operation of the photovoltaic power station according to the relation between the power operation abnormal measurement value and the preset power operation abnormal measurement value.

Description

New energy photovoltaic power operation analysis system and method Technical Field The invention relates to the technical field of photovoltaic power, in particular to a new energy photovoltaic power operation analysis system and method. Background With the deep implementation of global energy structure transformation and sustainable development strategy, new energy photovoltaic power generation is an important component of clean energy, and the installed capacity and grid-connected scale of the new energy photovoltaic power generation are continuously expanded. Photovoltaic power stations are generally widely distributed and complex in operation environment, and the power generation efficiency and stability of the photovoltaic power stations are jointly influenced by various factors such as illumination intensity, temperature, equipment aging, shadow shielding and the like. If the abnormal operation is not found in time, the generated energy loss can be caused, equipment faults and even system paralysis can be caused, and the safety and stability operation of the power grid are threatened. At present, the operation monitoring of the photovoltaic power station mainly depends on a data acquisition and monitoring control system, and the abnormality judgment is carried out by acquiring operation parameters such as voltage, current, power and the like in real time and combining a preset threshold value. However, the conventional method is mostly based on data points at a single moment for analysis, lacks overall consideration on the evolution rule of the time sequence of the operation state, and is difficult to effectively identify gradual type abnormality or compound type abnormality. In addition, the prior art has insufficient excavation of fluctuation characteristics of operation data, so that the potential risk early warning capability is limited, and false alarm and missing alarm phenomena are frequently generated. Disclosure of Invention The embodiment of the invention provides a new energy photovoltaic power operation analysis system and a new energy photovoltaic power operation analysis method, which are used for quantitatively analyzing fluctuation conditions of operation state data, comprehensively evaluating the abnormal degree of the operation state of a photovoltaic power station, ensuring the abnormal analysis precision of power operation and improving the stability and safety of the photovoltaic power station. In order to achieve the above object, the present invention provides a new energy photovoltaic power operation analysis system, comprising: the data acquisition module is used for acquiring a plurality of groups of operation state data of the photovoltaic power station, and combining each group of operation state data to obtain a plurality of operation state data sequences, wherein each group of operation state data corresponds to one data acquisition time; The first calculation module is used for calculating the abnormal operation state coefficient of the photovoltaic power station based on the operation state data sequence and the data acquisition time; the second calculation module is used for analyzing all the abnormal coefficients of the operation state, calculating a plurality of abnormal coefficient fluctuation values of the photovoltaic power station based on analysis results, and calculating an abnormal power operation measurement value of the photovoltaic power station according to the abnormal coefficient fluctuation values; And the operation analysis module is used for presetting a preset power operation abnormal measurement value and analyzing the power operation of the photovoltaic power station according to the relation between the power operation abnormal measurement value and the preset power operation abnormal measurement value. Further, the first computing module is configured to: the first calculation module is used for calculating the abnormal coefficient of the overall operation state of the photovoltaic power station according to the operation state data corresponding to the first data acquisition time and the operation state data corresponding to the last data acquisition time; The first calculation module is used for calculating the abnormal coefficient of the fluctuation running state of the photovoltaic power station according to the residual running state data; the first calculation module is used for carrying out weighted summation on the integral operation state abnormal coefficient and the variable operation state abnormal coefficient to obtain the operation state abnormal coefficient of the photovoltaic power station. Further, the first computing module is configured to: The first calculation module is used for calculating the absolute value of the difference value of the running state data corresponding to the first data acquisition time and the running state data corresponding to the last data acquisition time as the running state data difference; The first