3BSC840157R1 TU891 base ABB module terminal unit

Description

Primorska’s existing 110 kV closed circuit
Connected, this line is thousands of miles long, and the 3BSC840157R1 TU891
Then it is connected to the transnational transmission line to Italy.
Pumped storage power station is also a conventional hydropower generation station in the region
The development of electrical facilities has provided support. Pumped storage
Supporting facilities of the power station include upper reservoir and headrace tunnel
Road, buffer tank, penstock, power house, etc.
The power station is located on the left bank of the Soca River
The meter deep power station shaft and elevated area constitute. vertical
Installation of reversible pump turbine and electric generator in the well
Generator set and its auxiliary equipment. In the powerhouse
Equipped with excitation system equipment, circuit breaker and transformer
Generator, diesel generator, battery pack and mobile crane
Heavy machinery, etc.

Optimizing the Operation of Pumped Storage Power Station
3BSC840157R1 TU891 To ensure the efficient operation of pumped storage power plant, SENG
The company decided to install 195 MVA reversible variable speed
crew. Compared with the conventional constant speed solution
The quick pumping storage device has the following advantages.
In the constant speed solution of synchronous motor, the excitation device
The setting can only adjust reactive power; During power generation
Medium, active power can only be achieved by using guide vanes
Make mechanical adjustments. In water pump mode, adjust
Absorbing active power is completely infeasible. If used
Variable speed solutions in pumping and power generation processes
The active power and reactive power of the motor are both
The AC excitation system shall be adopted for adjustment. these
The technical advantages finally bring considerable
Economic benefits.
1 Avc ˇ E The power station of pumped storage power station is located on the bank of Soca River,
Overlooking the beautiful scenery of Xiaku
Over the past 30 years
Control algorithm of frequency converter
To continue to improve.
Pumped storage equipment absorbs a large amount of energy during the period of low electricity price
Energy; During the peak period of power consumption, the power station uses water storage
Power generation.
Control and absorb active power
The energy storage mode will be more flexible. And general
Compared with fixed speed units, this flexibility is reflected in
The following aspects: optimizing storage state and improving phase
Energy storage at the same time and greatly reduced opening
Number of machine shutdown programs, etc. In addition, even when
In pumping mode, 3BSC840157R1 TU891 also controls active power
Helps to control the main grid frequency (additional services).
In the conventional constant speed unit solution, such as in use
This service must
This can only be done by turning on the generator. no
It goes without saying that if we consider from an economic point of view, the electricity price is
It is unwise to generate electricity at low hours. Therefore,
The installation of variable-speed pumped storage units can realize
Maximizing economic benefits: by optimizing water pumping
Electricity operation and grid service, thus creating more
profit.
In pumped storage power plants
In grid connected power generation of other renewable energy sources
The power control of high-speed motor plays an important role in
effect. For renewable energy production equipment
Said that this role should not be underestimated. Although we can
The power generation capacity of the production equipment of renewable energy can be predicted,
But they can not be used according to the power demand
Leveling. Pumped storage is used for intermittent energy generation and
The actual grid provides the largest scale and cost-effective
Highest solution. In addition, it can also avoid
Emission of gas turbine free power plants during peak power generation
Excess greenhouse gases.
Flexible access to electricity 29
ABB AC excitation system is based on advanced three-level
Voltage source converter (VSC) topology technology. ABB
The production of power electronic frequency converter has a long history
Long time. The first generation products were delivered in the 1970s
Pay. ABB voltage source converter technology is applied in many
It is widely used in various fields, such as railway network interaction
Combined, static var compensator (STATCOM) and
Power supply of static frequency converter (SFC), etc. In addition,
Since the early 1990s, ABB has also applied this technology
Applied to AC excitation system of doubly fed induction motor
Rotary frequency converter. ABB in doubly fed induction
In terms of machine application, more than 20 AC exciters can be installed
Converter, with rich application experience
The control of rotary converter has been tested for more than 30 years
The algorithm has also been continuously improved.
ABB’s experience in these areas is obvious to all
of With a large amount of experience accumulated over the years
ABB calmly responded to pumped storage power
Special problems in station construction to ensure power supply
Safe and stable operation and operation of the machine. ABB voltage
Source converter topology technology for assembly in three-level electrical
The unit is considered as a short-time flywheel accumulator. this
Some excellent control capabilities can be used for long-distance transmission
Stability improvement of the line.
ABB PCS 8000 AC excitation system
At Avc ˇ E In the pumped storage power plant project, ABB
The products provided include AC excitation converter
And its control unit, and converter protection device
Set, excitation transformer, starting device
2。 ABB is responsible for engineering design, project management
Production, factory acceptance test, on-site installation and commissioning
Trial work. All projects are automated by ABB
The product department has completed the implementation of the production base in Tuerji, Switzerland
Cheng. The Turgi production base is responsible for
PCS 8000 excitation
Magnetic system production.
AC excitation system
Box delivery
Scheme, set in box
Standby includes transformation
Device and control protection
Cabinets and water cooling units ｜ 3, 4 and 5. full set
The equipment is assembled and tested in ABB factory to reduce
Less time for on-site installation and commissioning. On site commissioning
Before test, control software (including converter and excitation
Transformer protection function software)
Part closed loop real-time simulator. such
The on-site commissioning time is greatly reduced to avoid
Too much waiting during the test.
ABB AC excitation system
Double fed induction motor built in variable-speed pumped storage device
(DFIM)。 Three phase slip ring and
Wound rotor connection. By connecting the AC excitation system
The low-frequency alternating current in the is transmitted to the rotor to change the speed
The operation is realized. The frequency of the rotor current depends on
At the power grid frequency, it is also synchronized with the actual speed
The difference between speeds is related. Actually, PCS
8000 AC excitation system controls the rotor phase
For synchronous speed slip. At the same time, opposite excitation
The vector control of magnetic current makes the motor speed/active power
Power control and voltage/reactive power control become
probably. The control of the latter is similar to conventional DC
Excitation system, such as ABB Unitrol ® To synchronous electricity
Control of the machine. In addition, the starting/braking range of the motor
The sequence can also pass through the PCS 8000 AC excitation system
Unified implementation without using another initiator.
Since variable speed units control active power and reactive power respectively
Power, so it is helpful to achieve the stability of the power grid
function. Variable speed unit power station does not need to use any electricity
Force system stabilizer (PSS). Active power to motor
Power control can not only improve stability, but also
Respond quickly to grid disturbances. For the whole electrical
In terms of the grid, the variable speed unit can be regarded as a damper
Component, i.e. absorbing power vibration generated by synchronous generator
Swing. Mechanical with hydraulic guide vane unit
Compared with control, electronic speed control greatly reduces
Response time. Since the unit speed does not need to be connected with the power grid
The speed is synchronized, so we can change the power

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