A method for evaluating the reactive power support capacity of photovoltaic power plants
A photovoltaic power station and support capability technology, which is applied in photovoltaic power generation, reactive power compensation, reactive power adjustment/elimination/compensation, etc., to avoid the deterioration of the reactive power support capability evaluation index of photovoltaic power stations and improve the overall safety and reliability
Active Publication Date: 2019-03-22
CHINA ELECTRIC POWER RES INST +2
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[0004] To sum up, in terms of the impact and evaluation of reactive power support capacity of photovoltaic power plants, domestic and foreign countries are still in the initial stage. How to fully consider the differences between distributed photovoltaic power plants and centralized photovoltaic power plants, and comprehensively analyze the impact of different influencing factors on reactive power support capacity It is a key scientific and technical problem that needs to be solved urgently
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[0055] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0056] The evaluation methods of photovoltaic power plants in the prior art cannot evaluate and study their reactive power support capabilities. The weight selection issues involved in the evaluation index system are generally given according to empirical data, which has a certain degree of subjectivity. For photovoltaic power plants The research on the evaluation of reactive power supporting capacity has the problem that the evaluation index system is not comprehensive enough, and the weight selection of each evaluation index dep...
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The invention provides a reactive power supporting capacity assessment method of a photovoltaic power station. The reactive power supporting capacity assessment method comprises the following steps of: 1) constructing the reactive power supporting capacity comprehensive assessment index system of the photovoltaic power station; 2) collecting test data which is required for carrying out assessment on the photovoltaic power station; 3) carrying out weight assignment on each assessment index of the comprehensive assessment index system; 4) analyzing the comprehensive grey relational degree of the comprehensive assessment index system; and 5) constructing the quantitative grading function of the comprehensive grey relational degree, and carrying out the assessment on the reactive power supporting capacity of the photovoltaic power station on the basis of the quantitative grading function. Compared with the prior art, the reactive power supporting capacity assessment method of the photovoltaic power station is characterized in that the reactive power supporting capacity of each class of photovoltaic power station can be effectively assessed, the problems that a current reactive power supporting capacity assessment index system is not comprehensive, the selection of each assessment index weight stock index depends on subjective experiences and the like can be solved, and the comprehensive reactive power supporting capacity assessment method and system of the photovoltaic power station can be formed.
Description
technical field [0001] The invention relates to the technical field of photovoltaic power station evaluation, in particular to a method for evaluating the reactive power support capability of a photovoltaic power station. Background technique [0002] Photovoltaic power generation has the characteristics of randomness and volatility, and the large-scale grid connection of photovoltaic power generation will have a negative impact on the safe and stable operation of the power grid. Satisfy the static security constraints of the grid such as node voltage constraints, line capacity constraints, and generator capacity constraints, and have certain static and dynamic reactive power margins. Photovoltaic power stations have the ability to continuously and smoothly adjust reactive power, have voltage control measures and a certain fault ride-through capacity, have reactive power regulation and voltage control capabilities, and ensure the voltage regulation function of the power syst...
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IPC IPC(8): G06Q10/06G06Q50/06H02J3/18
CPCY02E10/56Y02E40/30Y04S10/50
Inventor 刘美茵陈梅黄晶生丁杰朱凌志张军军郑飞秦筱迪
Owner CHINA ELECTRIC POWER RES INST