DVPS-5000 New Energy Station Fast Frequency Control System

Overview

Beijing Aodeweite Electric Power Technology Co., Ltd. has developed the DVPS-5000 fast frequency control system based on national standards such as GB/T40595-2021 "Technical Regulations and Test Guidelines for Primary Frequency Regulation System of Grid-connected Power Supply", GB/T19963.1-2021 "Technical Regulations for Wind Farm Integration into Power System (Onshore Wind Power)", and "Technical Requirements for Power Control System of Photovoltaic Power Station" (GB/T40289-2021). This system is suitable for various sizes and types of wind farms/photovoltaic power stations with energy storage systems, and organically integrates edge computing technology, Internet of Things technology, and primary frequency regulation technology with wind power, photovoltaic power generation, and energy storage power stations to achieve coordinated control of primary frequency regulation in new energy power stations. Currently, the DVPS-5000 fast frequency control system for new energy stations has completed third-party commissioned testing, and the test results fully meet the technical standards. This system consists of a high-precision frequency measurement device DVP-8111K, a core server DVP-810N, and a DVPS-5000 monitoring system.

High-precision frequency measurement device DVP-8111K

Collect and process current and voltage signals from the grid point, and calculate active power, reactive power, and frequency with an accuracy of up to 0.001Hz. This is used to achieve high-precision and rapid measurement of power station frequency and grid point power.

Core server DVP-810N

The system is equipped with the built-in DVPS-300 primary frequency regulation software and integrates AGC/AVC controller functions. It can collect real-time power grid frequency and grid-connected point active power data through a high-precision frequency measurement device, communicate with the main dispatching station to obtain the AGC regulation target value, and initiate primary frequency regulation when the function is enabled and the conditions for initiating primary frequency regulation are met. Based on the frequency regulation coefficient and frequency regulation action threshold, the primary frequency regulation control target value is calculated, and the corresponding power adjustment command is issued to send this frequency regulation target value to each inverter (sent to the wind turbine control system in the wind farm).

DVPS-5000 monitoring system

The functions of the primary frequency modulation (PFM) rapid response system include: grid anomaly detection; system active power, reactive power, and frequency monitoring; monitoring of the operation status of all inverters; rapid frequency modulation triggering and single-machine rapid frequency modulation command triggering; and a monitoring workstation for data acquisition, data analysis, data storage and archiving, interface display, and fault alarm indicator functions.

New energy (wind farms, photovoltaic power stations) stations utilize corresponding active power control systems, standalone machines, or additional independent control devices to complete the active-frequency droop characteristic control of the entire new energy station (station or energy storage), enabling it to participate in rapid grid frequency regulation at the grid connection point. The primary frequency regulation active-frequency droop characteristic is achieved by setting a frequency-active power broken line function. See the figure below: