Inherit and surpass classics. Shenzhen Guodian Xuzhen has focused on the research of intelligent quasi synchronous control technology for more than te

2022-03-25 3827 字號：分享

Contents of this article:
1. Scope of application
2. Main features
3. Main functions
4. Research and development and listing process of Shenzhen Guodian synchronous series products
5. Partial project performance (picture and text)

1、 . scope of application:
Realize the parallel operation of various large power plants (thermal power, hydropower, etc.), substations, large emergency power vehicles and high-voltage lines within 100MW. It is one of the best devices for automatic parallel operation of various synchronization points on the side to be paralleled and the system side. It is one of the important accessories to ensure safer, more efficient and more intelligent power production and transmission!
2、 Main features:
◆ artificial intelligence logic predicts various parameters and indicators in advance to ensure that the first grid connection opportunity is captured, and the grid connection is accurate, fast and reliable without impact;
◆ all digital circuit, less susceptible to interference in harsh environment, more safe and reliable;
◆ automatically variable parameters, frequency modulation and voltage regulation, and accurately predict the closing phase angle;
◆ synchronization parameters that can be set according to requirements include: allowable differential pressure, allowable frequency difference, allowable angle and power angle settings (special authorized configuration);
3、 Main functions:
◆ The device can be reused for grid connection of generator or line, and has the function of automatically identifying the nature of grid connection;
◆It has multiple set synchronization parameters, which is convenient to set according to the site requirements;
◆The device uses an accurate and rigorous mathematical model to ensure that when the differential frequency is connected to the grid (generator to system or two split systems)
Line grid connection between lines) capture the zero phase angle difference for the first time and conduct impact free grid connection;
◆ In the process of generator grid connection, the device treats the frequency and voltage of parallel units according to the fuzzy control theory and algorithm
Line control to ensure that the frequency difference and pressure difference enter the setting range as quickly and stably as possible, so as to realize rapid grid connection;
◆ The device has the function of automatic identification of differential frequency or same frequency grid connection. During the same frequency grid connection (loop closing) of the line, if the power angle and differential pressure on both sides of the parallel point are less than the setting value, the grid connection operation will be implemented immediately;
◆The device can be applied to systems with line voltage of 100V and line voltage of 400V. After connecting according to the terminal label, modify "parameter 1" at the same time;
◆ When the same frequency occurs in the process of motor differential frequency grid connection, the device will still automatically give "closing" according to the phase angle difference
Command, no need to eliminate the same frequency state;
◆ The device can ensure that there is no reverse power grid connection and reactive power leading phase when needed;
9. With undervoltage protection function (undervoltage value can be set according to user requirements, parameter 12);
◆The device adopts fully enclosed and tight electromagnetic and photoelectric isolation measures, which can adapt to the harsh working environment;
◆The working power supply of the device is AC / DC dual-purpose type, which can automatically adapt to AC / dc100-250v power supply.
4、 Operation and listing process of intelligent quasi synchronous series controller:
Ptq2000 intelligent quasi synchronous controller in 2002
2004 ptq2000a intelligent quasi synchronous controller
2005 ptq2000b intelligent quasi synchronous controller (with comprehensive power protection function)
2006 ptq2000c intelligent quasi synchronous controller

2006 pfx-1 quasi synchronous splitter (used in combination with ptq2000c, supporting 8-way synchronous points)

2007 Gdt-1 intelligent quasi synchronous control device in (special for small power units)

2011 ptq2000a1 intelligent quasi synchronization control device

2018 gdt-3 intelligent quasi synchronization control device (special for small power units)

2021 ptq2000s1 intelligent quasi synchronous controller

5、 Performance of some application projects:
For more than ten years, one of the core technologies of Shenzhen Guodian Xuzhen: Intelligent Synchronous Series controllers have been applied and put into operation in the market, which is a powerful guarantee for ensuring the production and transmission of power system.
The following are some application achievements:
Guangxi Huanjiang County Dajin hydropower plant {12MW
Jinjiang hydropower station in Chengmai County, Hainan Province {6MW
Yunnan Xinping jiepaihe power plant} 4MW
Yagongjiao hydropower station in Zijin County, Guangdong Province {6MW
Guangdong Dongguan waste incineration power plant 15 MW
Qilongshan hydropower station in Guangzhou, Guangdong} 3MW
Guangdong Jieyang Longjing hydropower Co., Ltd. 24mw
Longhui hydropower station, Liannan County, Qingyuan City, Guangdong Province
Large emergency power supply vehicle of State Grid / China Southern Power Grid, 2MW

[company profile] Shenzhen Guodian company was reorganized and established in 2011. Since 2002, the team has been engaged in the R & D, production and sales service of power system automation and hydropower station automation products. After long-term unremitting efforts, in line with the business philosophy of "customer-centered, quality first, integrity-based, leading science and technology and win-win cooperation", great progress has been made and recognized by users.

We have been devoting ourselves to the research and development of hydropower station automation and application technology of power automation products, testing, improving, comparing and screening the electrical automation control technology of rural small hydropower stations, constantly exploring the scheme suitable for the electrical automatic control of old power stations, and summarizing a complete set of electrical automation transformation scheme fully in line with the actual situation of rural small hydropower stations in China, In the past 17 years, there have been more than 5000 power stations equipped with Shenzhen Guodian Xuzhen core controller (accessories) in areas with hydropower stations in China, and more than 1000 power stations equipped with Shenzhen Guodian automation system terminals in the past six years
[main products] Shenzhen Guodian Corporation has made high-quality products for more than ten years: full-automatic intelligent power generation control panel of hydropower station, unattended automation system of hydropower station, microcomputer hydraulic governor, intelligent excitation panel, semi-automatic control panel of hydropower station, IGBT DC governor of hydropower station, dual-purpose governor of hydropower station, intelligent water conservancy and ecological flow monitoring system; Core controller business of hydropower station: intelligent excitation controller, integrated protector controller, intelligent automation integrated controller and intelligent quasi synchronization controller.

Our mission: to make power production and transmission safer, more controllable, more efficient and more automatic. Welcome to consult: Shenzhen Guodian Xuzhen Electric Technology Co., Ltd. and Shenzhen Guodian automation equipment Co., Ltd400-698-3738，0755-84613738

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Inherit and surpass classics. Shenzhen Guodian Xuzhen has focused on the research of intelligent quasi synchronous control technology for more than te