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SINOPAK Water Cooled STATCOM Design Solution
Sinopak water cooled STATCOM adopts closed-loop water cooling system, it is no need external water supply.
It can be used in all kinds of installation conditions.
Comparison between water cooled STATCOM and air cooled STATCOM
Environmental adaptation
Few days later
In Air cooled conditions, there are some shutters to meet system cooling, a large number of dust will be brought into the equipment, which affect cooling performance.
One year later
Water cooled SVG adopts high degree of protection(IP55), Power valve tower are placed in a sealed space, heat is took away through water cooling system, there is no interaction with outer environment.
Reliability
More higher reliability
The working condition of power module in SINOPAK water cooled SVG is more better compared with air cooled SVG.
Power module in SINOPAK water cooled SVG has good heat dissipation conditions, working shell temperature and junction temperature more lower compared with SINOPAK air cooled SVG，which increased IGBT reliability and life.
Cost
Normal Environment
Under normal circumstances, due to water-cooled SVG needs a set of water cooling system, its initial investment cost will be higher than the air-cooled SVG.
Badly Environment
In the harsh environment, the air-cooled SVG needs dehumidification or air-conditioning scheme to compensate for its defects, which not only increase the initial investment but also increase the area of installation, and the effect is not as good as water-cooled SVG.
Maintenance cost
Air cooled needs regular cleaning and replacement of dust filter, its maintenance costs will be higher than the water-cooled SVG in future.
Water cooled STATCOM Composition
Start part Control part Power part
Cooling system part : Water cooled tube Water cooled chiller External heat exchanger
Water cooled STATCOM series products
Standardized Power Module Design
Standardized design：
124~569kVA full range of water cooled power modules are fully compatible with the structure; Support online bypass function.
Standardized Power Module Design
Platform design：
Same software with air cooled SVG； Same module board with air cooled SVG； Same IGBT etc with air cooled SVG
10kV Containerized STATCOM
10kV Maximum unit capacity 15Mvar
There are three rows of power modules in power chamber, each row can be installed up to 12 modules, a total of 36 modules.
10kV Indoor STATCOM
10kV indoor STATCOM, up to 15Mvar for unit capacity.
There are three rows of power modules in power chamber, each row can be installed up to 12 modules, a total of 36 modules.
10kV Outdoor Containerized STATCOM Up to 15Mvar for unit capacity
10kV Indoor STATCOM
35kV Containerized STATCOM without transformer
35kV Containerzed STATCOM, Maximum unit capacity 50Mvar
Power chamber is divided into three phases, eash phase has two rows, each row can be installed up tp 20 power modules. A total of 40 modules per phase.
35kV Containerized STATCOM without transformer
35kV Indoor STATCOM
35kV Indoor SVG power range: 12Mvar~50Mvar Valve tower size（Width* Depth* Height mm）： 3820*1350*2550 Unit valve can be installed up to 42 power modules.
35kV Indoor STATCOM
Water-cooled SVG production test capability
Batch board test platform
Power module test platform
Power module aging platform
Whole machine test platform
Whole machine aging platform
Water cooled STATCOM Features
Control cabinet: Fully sealed design, which ensure reliability under dust, salt spray etc
Control cabinet is fully sealed to avoid external dust or powder. In order to ensure reasonable inner temperature, we install fans on the top and bottom to realize internal air circulation. The whole control system components, low power consumption, high reliability. Through the thermal simulation of FlOWTHREM software, when the external environment is 45 ℃, the internal average temperature is 67 ℃, which meets the ambient temperature of components. Fundamentally solve the dust and pollution problems.
Full collection of Chain IGBT temperature
It has the functions of real time monitor, display of each IGBT temperature. IGBT temperature is most important factor for its life.
High voltage insulation advantage
Traditional：10kV heat shrinkable tube
Problem：No consideration of control potential and electric field distribution, it shows discharge under the 35kV voltage withstand test, safety test can not pass.
High voltage insulation advantage
TSVG Solution： Design an insulated conducting rod by tubular busbar technology, and shield bus connection part and terminals. Advantages：
1. Power frequency voltage withstand between insulation surface and copper bar 58kV/1min, meanwhile, solve power frequency voltage withstand at high altitude.
2、Creepage distance between insulation level surface and both terminals>300mm.
Insulation material adopted SMC, high reliability
Traditional solution：Insulation material adopted glass fiber.
Problem：Glass fiber has strong water absorption characteristics, longterm operation will result in insulation reduction, equipment discharge and board damage. Especially in Southeast Asia, more worse.
Insulation material adopted SMC, high reliability
TSVG Solution：Using SMC material Advantage: Water repellent, high bearing strength, high reliability during longterm operation.
Insulation material adopted SMC, high reliability
Traditional：Bus capacitor uses external solution
Problem：
1. Parasitic inductance increase too much in structure module and power circuit, and IGBT spike voltage increase too, which badly affect reliability and life of IGBT. 2. Capacitors are placed in air duct of module heat emission from radiator, which reduce heat emission efficiency.
Insulation material adopted SMC, high reliability
TSVG Solution：Bus capacitor uses built-in solution, adjacent to IGBT.
Advantage: Small parasitic inductance in power circuit, small IGBT spike voltage, high reliability, long IGBT life.
Using composite laminated busbar, high protection degree and reliability
Traditional solution：Laminated busbar adops two pieces of bare aluminum+Insulation paper.
Using composite laminated busbar, high protection degree and reliability
TSVG Solution：Using composite laminated busbar, high protection degree, anti-salt, dust and other harsh environmental conditions
Power module fault
Traditional solution：Using electromagnetic transformer for isolation
Problem: HV part is isolated from LV part by isolation transformer, mis-triggering may happen under the high-voltage electromagnetic environment.
Power module fault
TSVG Solution：Using optocoupler isolation to avoid electromagnetic interference and enhance the drive reliability
High flow-balance degree
High water-cooled flow: water-cooled piping flow-balance design, using symmetrical layout pipeline parallel technology, the flow between the module is less than 5%.
Piping flow-balance simulation model
Hydroelectric separation， high reliability
Safety&Reliability:
Module electrical connection is separated from water connection, which avoids electrical short circuit caused by water leakage.
Balance heat emission：
Water cooling pipeline adopts hierarchical symmetrical structure，and the inter-module waterway is independent of each other and the waterway is connected in parallel, which avoids the overheating problem caused by the waterway series.
Power Module Auto Bypass Function（Optional）
When fault of power module happened, the bypass switch will switch off fault power module automatically, and then ensure SVG continous operation without stop.
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