Generator Set Frequency Urgency Evaluation Across Power Grid Types
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Solution Overview
Problem
Current power grid frequency regulation studies focus primarily on wind power integration, neglecting the role of nuclear power generators, which operate with base load and do not exhibit intermittence or fluctuation, leading to a lack of correlation in frequency regulation requirements.
Innovation Solution
A method to evaluate the frequency regulation urgency of a power system by simulating frequency fluctuations under normal and fault conditions, calculating the degree of frequency regulation participation and urgency based on the installed capacity proportion of different generator types, including thermal, hydropower, and nuclear power generators, using formulas that incorporate deadband settings and frequency variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency regulation studies focus primarily on wind power integration, then the evaluation of power grid frequency fluctuations caused by intermittent power sources is improved, but the applicability to nuclear power generators which operate with base load is worsened
Solution Approach 1:
The patent applies local quality by differentiating the frequency regulation evaluation methodology for different generator types. It introduces generator-specific parameters such as deadband settings and response characteristics that are tailored to each generator type's operational characteristics, rather than using a uniform approach for all generators.
Solution Approach 2:
The patent changes parameters by introducing type-specific parameters for different generator categories. It modifies the evaluation model to incorporate deadband settings, response time constants, and capacity proportions that vary according to whether the generator is wind-powered, nuclear, thermal, or hydro-based, thereby adapting the general frequency regulation framework to local characteristics.
2Device complexity
If a uniform frequency regulation evaluation method is used for all generator types, then the device complexity is reduced, but the measurement precision for specific generator characteristics is worsened
Solution Approach 1:
The patent segments the frequency regulation evaluation method into distinct categories based on generator type. It divides generators into wind power, nuclear power, thermal power, and hydro power categories, each with its own evaluation parameters and calculation formulas, thereby managing complexity through structured segmentation rather than attempting to model all characteristics in a single complex framework.
Solution Approach 2:
The patent introduces dynamic elements by incorporating time-dependent parameters such as response time constants and deadband settings that vary according to generator type. The evaluation method dynamically adjusts parameters based on the specific generator category being assessed, allowing for precise measurement without requiring an overly complex static model.
Data Source
AI summary
Provided are a method and apparatus for evaluating a degree of frequency regulation urgency of a generator set, a power system and a storage medium. The method includes obtaining a power grid frequency fluctuation trend under a normal operation condition and a power grid frequency fluctuation trend under a fault condition through simulation analysis based on the proportion η of the installed capacity of each of multiple types of generator sets in a regional power grid; obtaining a degree P of frequency regulation participation of each of the multiple types of generator sets based on the power grid frequency fluctuation trends under the normal operation condition and the fault condition; and calculating a degree U of frequency regulation urgency of each of the multiple types of generator sets in a power system based on the degree P of frequency regulation participation of each of the multiple types of generator sets and the proportion η of the installed capacity of a respective type of generator set corresponding to the degree P of frequency regulation participation, and implementing frequency regulation participation of the regional power grid in the power system based on the degree U of frequency regulation urgency.