Series Compensation Insulation Coordination via Overvoltage Partitioning
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Solution Overview
Problem
The existing insulation coordination methods for series compensation apparatuses in power grids are inadequate as they ignore system-side faults and have limited reliability, particularly in addressing various fault types, leading to potential damage and instability.
Innovation Solution
An insulation coordination method and system that determines the topology and system parameters of the series compensation apparatus, partitions overvoltage analysis areas, constructs simulated operating conditions, and calculates the number and configuration of lightning arresters to ensure safe operating voltages, thereby enhancing fault tolerance and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing insulation coordination method is used, then the implementation is simple, but the reliability is low and system-side faults are ignored
Solution Approach 1:
The patent segments the series compensation apparatus into multiple analysis areas (system-side analysis area and device-side analysis area) with different overvoltage characteristics. This segmentation allows targeted analysis of system-side faults that were previously ignored, improving reliability without requiring complete redesign of the insulation coordination method.
Solution Approach 2:
The patent performs preliminary overvoltage partitioning and identifies critical analysis areas before conducting detailed insulation coordination analysis. By pre-identifying system-side fault scenarios and their impact on different apparatus components, the method prepares comprehensive protection strategies in advance, enhancing system reliability.
2Adaptability or versatility
If the lightning arrester configuration protection mode is used, then the implementation is straightforward, but it is difficult to solve various fault types
Solution Approach 1:
The patent applies different protection strategies to different analysis areas based on their specific overvoltage characteristics. The system-side analysis area uses one protection approach while the device-side analysis area uses another, allowing tailored protection for each region's specific fault types and improving overall adaptability.
Solution Approach 2:
The patent dynamically adjusts the insulation coordination strategy based on the identified overvoltage analysis areas and their specific fault conditions. The method adapts its analysis depth and protection requirements according to the particular system configuration and fault scenarios, enhancing versatility across different fault types.
3Measurement precision
If overvoltage partitioning is performed to obtain multiple analysis areas, then the analysis precision is improved, but the calculation complexity increases
Solution Approach 1:
The patent divides the series compensation apparatus into distinct overvoltage analysis areas with clearly defined boundaries and characteristics. This segmentation enables focused analysis on critical regions while simplifying the overall calculation by treating different areas with appropriate analysis methods tailored to their specific overvoltage behaviors.
Data Source
AI summary
Provided are an insulation coordination method and system for a series compensation apparatus, a storage medium and an electronic device. The method includes determining a topology of a series compensation apparatus and a system parameter and an operation mode of an access system of the series compensation apparatus; performing overvoltage partitioning on the series compensation apparatus; constructing a simulated operating condition according to a plurality of overvoltage analysis areas and an operating condition; establishing an overvoltage simulation analysis model; performing a simulating calculation for different preset fault types according to the overvoltage simulation analysis model; determining the number of lightning arresters installed in each overvoltage analysis area and a continuous operating voltage value of each lightning arrester; and determining, according to a preset insulation coordination coefficient and the continuous operating voltage value of each lightning arrester, a safe operating voltage of the series compensation apparatus.