Composition of a device
TCR+FC type static reactive power compensation device is composed of thyristor valve group, phase control reactor, fixed capacitor filter (FC), digital control system and valve set condition monitoring and protection device.
The thyristor valve group adopts single phase horizontal structure, compact structure and small floor area. The structure is composed of a thyristor, a voltage sharing resistor, a damping capacitor resistor, a high potential trigger board, a thyristor BOD over voltage protection plate, a heat pipe radiator and a supporting frame. Thyristor valve series, control of the reactor equivalent of the change. The uniform pressure resistance is applied to the steady state voltage of series thyristor. The damping resistance capacitance is used for the transient voltage sharing of series thyristor. A high potential trigger board triggers a thyristor based on the triggering pulse of the controller. Thyristor BOD over voltage protection board is used to protect the thyristor trigger pulse loss.
Phase control reactor manufactured by professional manufacturers, divided up and down two, the thyristor valve group. Under the control of the thyristor valve group, the variable reactive power is issued.
Fixed capacitor filter consists of a number of branches. Each branch of the filter capacitor is tuned to a harmonic frequency, filter the harmonics, while providing capacitive reactive power for the system.
Digital control system with digital signal processor as the core device, the application of instantaneous reactive power theory algorithm, fast and accurate calculation of reactive power and compensation, and then calculate the TCR trigger angle. The pulse forming circuit is formed by the trigger pulse, and the electric switch is sent to a high potential trigger board to control the conduction of the thyristor.
Condition monitoring and protection device of valve group to monitor the working state of thyristor. When the trigger plate is under pressure, the trigger pulse is lost, the BOD action is frequent, the alarm and trip, and the upper computer display and save the fault record.
Two technical features
Control system adopts based on DSP digital controller, the application of instantaneous reactive power theory are controlled by program, the dynamic response and control with high precision, strong programming function, modular design, of trillions to tens of megabytes device can provide integration is constructed.
2 monitoring system to provide friendly man-machine interface, real-time display system working state.
3 cooling system uses the heat pipe cooling method, the operation noise is low, the operation is reliable.
4 control mode is flexible, which can achieve a variety of control methods such as three-phase simultaneous control, split phase control and three-phase balance.
Three technical parameters
1 voltage level 6kV, 10kV, 27.5kV, 35kV
2 system frequency 50Hz
20ms response time is less than 3
4 control power AC220V or AC380V
5 reactor connected form split delta connection method
6 compensation capacity 1-150Mvar