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Network Connection and Power Quality

 

The safety and quality of the energy produced is undoubtedly important. If you want to define the quality of the energy simply
At the point, the amplitude and frequency of the voltage is to maintain the nominal values ​​and the waveform is sinusoidal. Electrical energy on the consumer side
no quality assurance and supervision can be provided before use because it requires continuity and cannot be stored. Produced for this reason
energy needs to be high quality and reliable. Unfortunately, the energy produced by the generators is the quality that is produced to the consumer.
It can not be forwarded. Maintains the production quality of electricity after the production stage
should be performed in the form.
Primary Frequency Control
Primary frequency control (PFC) service, with the speed regulator of the unit active output power in response to the
it allows the system frequency to be brought to a new equilibrium point by means of automatic boosting or decreasing. So the system frequency is below 50 Hz.
The active power generation is increased by means of the speed regulator in the thought turbines and the frequency is stopped at a value below 50 Hz.
In this value, the frequency of the stopped frequency (50 Hz) comes again with the secondary frequency control (SFK) is. For this,
There are production reserves.
Primary Frequency Control Performance Test;
The technical procedure for primary frequency control performance tests is described in Annex-4 of the electricity market grid regulation. Performance
Before starting the test, the production plant staff can use the unit control systems for demonstrating the primary frequency control functions, in particular
The operation between the turbine speed regulator and the boiler control system is expected to give simplified block diagrams to the testing team. Primary frequency
In addition to the following values ​​during the test performance tests, the values ​​that the test team deems necessary are recorded:
Active Power Output (MW)
Mains Frequency
Simulated Frequency
Valve Positions
Steam Pressure
Steam Temperature
Sampling rate for each value of the measurement made during primary frequency control performance tests. At least 10 data per second (minimum 10 Hz)
should be. Primary frequency control performance testing consists of three stages:
Primary Frequency Control Reserve Test
Primary Frequency Control Sensitivity Test
Primary Frequency Control 24 Hour Verification Test
Secondary Frequency Control
Secondary frequency control service, the total value of the system frequency and the total electrical energy exchange with neighboring electricity networks.
to increase or decrease the value to the programmed value.
Secondary Frequency Control Performance Test;
Secondary frequency control performance tests consist of two stages.
the control prequalification performance test and the secondary load to be realized on the National Load Dispatch Center through the Automatic Production Control (AGC) system
frequency control performance test. The setting sent by the Automatic Production Control (AGC) program in the National Load Dispatch Center
The functions of the AGC System / Interface in the production unit that will participate in the secondary control according to the values ​​will be checked.

The AGC program uses the di PD Validity ile signal that is sent periodically to the production unit via SCADA System.
if the LRPD alarm is generated at the plant and the Automatic Production Control is not received during a certain time-out period (60 seconds)
When the system / interface position changes from REMOTE position to LOCAL, switching to REMOTE position again receives AK PD Validity imi signal.
then it will be checked however it is possible with operator intervention.

Automatic Production Control System / Interface in the Human Machine Interface (HMI)
will be checked displayed:
AGC control block diagram Operation mode of the AKC systemA setpoint and distribution to unitsLocal setting value (Operators intervention will be possible) Secondary frequency control limits on unit basis (Operators intervention will be possible) Production unit secondary frequency control maximum and minimum capacity values ​​(MAXC and MINC) - Production unit secondary frequency control band State of the ası PV Validity i signalAccounting of the OBC System / Interface Total primer reservoirs of the primary reservoirs Participation status signals to the primary frequency control (PFCO) Unit load / throw speedsSpeed ​​regulators slope setpoints (governor droop setting) - Total power generation controlControl error (with setting value difference between power plant production)
In addition to the records to be taken at the plant during the production unit secondary frequency control tests, SCADA by TEİAŞ National Load Dispatch Center
save the following values ​​from the system
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