Products

  • Product Name：GQH-Td AC/DC Integrated Power Supply System

    Model： GQH-Td
    Introduce：TIEON GQH-TD Digital AC/DC Power System is an one -stop solution for substation’s auxiliary power supply system, which is a blend of design, monitoring, production, debugging and service of the AC Power System, DC Power System, Inverter Power System and Communication Power System. It makes a turn key project for substation power supply systm and takes the lead in the whole country.
Description：

Illumination of GQH-T system

GQH-Td Digital Integrated AC/DC Power System provides an integrated solution for substation auxiliary power supply equipments. This system unifies the design, monitoring, production, debugging and service of the AC Power System, DC Power System, Inverter Power System and Communication Power System. 

The system offers network-based communication of each sub-system of substation power through its integrated monitoring module to collect information of substation power and build the digital power software platform.  The system, being very compact, results into elimination of secondary cabling as well as cross-panel secondary cabling outside the module. 

The system builds digital power hardware platform through intelligence modules of all switches, contactors and breakers and decentralization of centralized function of substation power.  The integrated monitoring module communicates with the host computer through the Ethernet interface and IEC61850 protocol so as to make the substation power an open system.


1.2 Applicable Range

A.        Digital Substation

B.        General Substations with Voltages range from 10 kV~1000kV

II. System structure
1. Primary section:
Include AC, DC, UPS and communication power. 


 
Interface of Digital Integrated AC/DC Power System


GQH-T principle sketch
(1) Through the integrated monitoring module, it integrates the AC, DC, UPS and communication power, establishing unified monitoring and information-sharing platform to realize intelligent network.
(2) It uses ATS (automatic transfer switch) to transfer the inputs power automatically. ATS can avoid the collision of two inputs of power.
(3) By using AC/DC inverter module and DC/DC communication module connect to the DC bus, redundant batteries for UPS and communication can be reduced.

 

2. Communication structure

 

 

 

 


 

 

 

 

 

 

 

 

 

 

 

Typical designs
1. One bus system
It is commonly used in 110kV and below transformer substation.

2. One bus divided system
This type of design is commonly used in 110kV, 220kV, 500kV transformer substation.


 

Advantages and features
1. This system realizes the monitoring and controlling of AC power system, DC power system, UPSsystem and communication power system on a single platform. Through HMI interface, customers can review data such as electric quantity, switch status, event records and other information of each sub-system and can set values, select operating mode and perform remote control on switch.
2. The integrated substation power system can be managed and serviced by the same maintenance personnel and reduced maintenance cost. In the system, the communication power and UPS can share the same battery bank which cut the cost and make the walk-round inspection be much easier and convenient. Besides, the system can conduct power analysis failures and position hidden dangers.
3. The system adopts modular design, which makes all parts be standard. Thus the design and production are much simper and can largely shorten lead time. Besides, numerous secondary lines and cross-panel secondary cables are well placed within module, safer and easier maintenance.
4. The system has outstanding performance on explosion-proof and combustion-proof isolation between the switches, thus individual switch can be changed independently. And each switch can be monitored. User can conveniently review switch information such as switch position, accident trip alarm, load current and current leakage etc.
 
5. the system adopts multiple energy-saving measures such as on-line discharge test and HF power converter etc.


 

 

 

 

 

 

 

 

 

System technical parameter:
1．AC input rated voltage: single phase: 220V, three-phase: 380V.
2．AC rated input power : 50Hz
3．AC voltage, current sampling precision (measuring scope 10% rating to 110% rating)
   Measuring precision: Level 1
4．Switching input : high level signal (logical 1): DC 24V, low level signal (logical 0), DC 0V
5．Exit relay connector : Contact capacity: AC 250V/5A
6．Precision of steady current : ±0.5% (20% limited current testing)
7．Stabilized voltage precision : ±0.5%。
8．Waveform coefficient : Waveform effective value coefficient ≤0.5% ; Wave peak coefficient ≤1%
9．Degree of unbalanced flow equalization : ≤±5%。
10．System data refresh cycle: 1.5seconds
11．Control response time: 1second;
12．Alarm response time: within 2seconds;
13．Software watchdog response time: 0 to 10 seconds
14．System data point: 2000
15．Respond time for communication equipments mentioned above: 300 millisecond

Integrated monitoring unit 

Functions:
1. Communication function: the monitoring unit interconnects and communicates between the intelligent modules, and communicates with host computer using Ethernet and IEC61850 protocol.
2. HMI Interface: Instantly displays electrical data such as voltage, current, power etc. Also can vividly display remote signaling status of ATS, switch etc.; and can achieve control downward such as remote control, remote adjustment etc.
3. Alarm function: Alarm is automatically intrigued when there is abnormal, and creates SOE record;
4. History record function:  Parameters are saved automatically; historical data and historical alarm can be recorded according to user’s requirements.
5. Logical processing function: automatically make logical judgment to over-limit situations
6. Programmed linkage control function: It programs the task and saves the program in the integrated monitoring module, once the program is activated, and then it can carry out corresponding programmed linkage control.

AC power system section
AC power system mainly includes: AC input module and AC feeder module.
AC input module: It integrates input switch, ATS switch, current transformer and intelligent circuit.
1) Six work modes of ATS switch
(2) Communication with up machines through RS485 communication interface.
(3) Real-time clock through GPRS
(4) Accurately record alarms or actions, time error≦1mS.The event will not lost after power failure.
(5) Protection function: Ground connection protection and Overload protection
(6) Real time test on input voltage, bus voltage and current, frequency, active power, reactive power, active kilowatt hours, reactive kilowatt hours and power factor, and upload them to host computer. Judge under voltage, over voltage and voltage line breakage.

 

AC feeder module/Inverter AC feeder module/DC feeder Module:
It integrates switch, current sensor and intelligent circuit.
(1) Alarm function of switch position and accident trip.
(2) Real time monitoring on current and voltage
(3) Leakage current monitoring and over limit alarm function
(4) Communication with up machines through RS485 communication interface.
(5) Remote control the feeder switch-on/off.
(6) Real-time clock through GPRS
(7) Accurately record alarms or actions, time error≦1mS.The event will not lost after power failure.

 

Inverter power system section
Inverter power system mainly includes: inverter module and inverter AC feeder module. They form a system according to N+1 principle with higher reliability.
Inverter power module

 

 

 

 

The inverter AC feeder module’s function is the same as that of AC feeder module

DC power system section
The DC power system mainly includes: charger module, DC monitoring module, DC bus monitoring module, voltage regulating module and DC feeder module. They form the system according to N+1 principle with higher reliability.
Feature:
1.Small power consumption, and high efficiency;
2.Superior reliability and stability, insensitive to the voltage fluctuation of power supply network;
3.Small volume, and light weight;
4.Modular design, N+1 hot backup, and ability for smooth capacity expansion;
5.Perfect monitoring function and high intelligence level.
6.Technical parameters of high-frequency switching DC power supply and conventional power supply are compared as follows:


2. Charger module
It is mainly used to fulfill AC/DC functions. Moreover, it possesses powerful protective functions.
(1) Input over-voltage/under-voltage protection;
(2) Output overvoltage protection/undervoltage warning;
(3) Short-circuit Protection;
(4) Loss-of-phase protection;
(5) Over-temperature protection;
(6) Primary side over current protection;
(7) Fan temperature control;
(8) Fault display;
(9) Communication function.


3. DC bus insulation monitoring module

It monitors in real time the voltage to ground of the positive and negative bus during the normal operation of system so as to obtain the insulation resistance value of bus. It gives an alarm signal in case of reduction of the insulation resistance of bus to make the fault indicating light ON and sends a fault signal to the monitoring module.

 

4. Voltage regulating module 
1. The function of step-less voltage regulation: no matter how the bus closing voltage changes, the control output voltage is stabilized at 220V±0.5%;
2.Furnished with hot pluggable technology and soft switching technology;
3.two-way voltage trip


DC/DC communication power system section
DC/DC communication power system includes DC/DC communication power module and DC/DC communication power feeder module.
1. The DC/DC communication power module converts 110V (220V) to 48V output. The module is directly hooked up to the operating DC bus.
2. Communication power feeder module (its main function is the same as that of AC feeder module)

 

Battery on-line monitoring system section
The battery on-line monitoring system includes: monitoring host, battery voltage acquisition module, discharge module and communication interface board.

1.It conducts automatic on-line monitoring of single battery voltage, battery bank terminal voltage, charging and discharging current and temperature, and can also record each instantaneous change during the battery charging and discharging period
2.Measures the internal resistance and load capacity of each single battery
3.Measures battery bank capacity and displays various parameters during static discharge.
4.The equipment will automatically stop discharging when the voltage of single battery is below the set value, the discharge time and capacity reach the set values, AC power is lost, etc.
5.Multiple fault alarm functions: voltage overlimit, temperature overlimit, average voltage differential value overlimit, etc.,
6.Automatically saves the alarm information and dynamic discharge data.
7.Compatible with LAN, RS232, RS485, MODEM, etc. adapt to the communication requirements of different systems.