Coordinated control method and system for active support of new energy power station containing voltage-controlled source
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Solution Overview
Problem
New energy power stations with a mix of devices from different manufacturers face challenges in responding quickly to frequency and active power changes, leading to grid instability, economic losses, and inadequate support capabilities due to independent power regulation and lack of coordinated control, especially when transitioning to systems with voltage-controlled sources.
Innovation Solution
A coordinated control method and system that sets internal parameters for voltage- and current-controlled sources, monitors power output states, calculates regulation margins, and establishes allocation logic for primary and secondary control to enhance active support capabilities, including primary frequency modulation, voltage regulation, and inertia support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If independent power control is used for each energy source device, then device operation simplicity is improved, but response time to frequency and active power changes deteriorates
Solution Approach 1:
The patent merges independent power control functions into a coordinated control system where multiple energy source devices (wind power, photovoltaic, energy storage, SVG) work together under unified control. The coordinated control system integrates control signals and coordinates power output across all devices, enabling faster collective response to grid frequency and active power changes while maintaining individual device operational simplicity through standardized control interfaces.
2Adaptability or versatility
If traditional current-controlled source architecture is used, then device compatibility is improved, but autonomous voltage-frequency establishment capability deteriorates
Solution Approach 1:
The patent introduces a voltage-controlled source that provides universal functionality for autonomous voltage and frequency establishment while maintaining compatibility with existing current-controlled devices. The voltage-controlled source can operate in multiple modes (voltage control, current control, power control) and serves as a master controller that coordinates all other devices, enabling the entire system to function autonomously without requiring fundamental changes to individual device architectures.
3Device complexity
If constant active power and constant reactive power control is used, then control simplicity is improved, but active support capability for primary frequency modulation deteriorates
Solution Approach 1:
The patent transitions from static constant power control to dynamic coordinated control where active and reactive power outputs are continuously adjusted based on real-time grid conditions. The coordinated control system dynamically allocates power among devices, adjusts voltage and frequency references, and modifies control parameters according to system state, enabling effective primary frequency modulation and voltage regulation while maintaining manageable complexity through systematic control strategies.
4Adaptability or versatility
If devices from multiple manufacturers are integrated, then system versatility is improved, but coordinated response to power grid changes deteriorates
Solution Approach 1:
The patent introduces a coordinated control system as an intermediary layer between diverse manufacturer devices and the power grid. This intermediary translates various device types and control protocols into a unified control language, standardizes communication interfaces, and coordinates power output across all devices. The SVG and voltage-controlled source serve as key intermediaries that can interface with different device types while maintaining consistent system-wide control, thereby preserving manufacturer diversity while achieving reliable coordinated response.
Data Source
AI summary
Disclosed are a coordinated control method and system for active support of a new energy power station containing a voltage-controlled source. The method includes: obtaining a working mode and a controlled target value of an external characteristic of a new energy power station, and setting internal parameters of a voltage-controlled source and a current-controlled source in the new energy power station; monitoring a power output state of a controlled unit of a voltage source, and calculating a regulation margin of the voltage source; setting power, inertia, and an objective function and a constraint of multi-source coordinated control of primary frequency modulation (FM)/voltage regulation for the new energy power station, and obtaining controlled allocation logic of a current source based on the objective function and the constraint of the multi-source coordinated control; and setting secondary control logic of each controlled unit and its allocation priority strategy.