◆ start the power generation operation process after the self inspection meets the safety requirements;
◆ constant water level operation: automatically start and shut down according to the water level, and automatically adjust the active power of the unit; Automatic regulation of reactive power;
◆ automatically start the excitation after the unit is started, and automatically track the grid voltage after excitation; There are three excitation modes for on load operation: constant power factor, constant voltage and constant excitation; With the given characteristics of no-load V / F, it can stand by at low speed for a long time to ensure that the excitation current will not be large; Grid connected constant power factor operation function, so that no matter the load is increased or decreased, there is no need to manually adjust the excitation; The automatic voltage stabilizing function of load rejection eliminates the need for manual regulation of excitation in case of load tripping.
◆ the detection frequency, voltage and angle meet the standard high-precision, impact free and fast capture the first appropriate grid connection opportunity, and automatically connect to the grid at the same time. After the grid connection, it will automatically operate according to the set power factor value;
◆ eight way temperature patrol alarm protection;
◆ unit speed control, runaway protection, current quick break protection, current overcurrent inverse limit protection, reverse power protection, overload protection and minimum power protection;
◆ undervoltage protection, overvoltage protection, low frequency protection, over frequency protection and circuit breaker fault protection;
◆ automatically identify the shutdown process and conduct de excitation control; Brake control and gate valve closing control;
◆ on the same day and in the same month, the active kWh and reactive kwh shall be measured cumulatively;
◆ fault record; Automatic meter reading and recording of all power generation parameters every ten minutes and permanent storage;
◆ the design of automation panel is suitable for the selection of six operation and power regulation modes of hydropower station;
1. Smart power generation mode: automatically adjust the power according to the water level of the forebay, that is, automatically increase or decrease the load according to the water level, and multi unit coordinated power generation, always maintain high water level operation, indirectly increase the water head and increase the power generation.
2. Power regulation by potentiometer refers to manually adjusting the external knob potentiometer to set the target power for power generation.
3. Manual power regulation, i.e. manually pressing the button to add or subtract water to regulate the power generation.
4. Computer remote target power: the target power is set by remote communication to generate electricity.
5. Computer remote target opening: the target opening is set by remote communication to generate power.
6. For power stations assessed in peak valley period and peak valley period, they can flexibly set regular power generation and time-division power generation to maximize power generation benefits.
◆ the system will conduct AC sampling measurement on the frequency, voltage and phase of the power grid and the unit, and the grid connection can be carried out only when certain grid connection conditions are met. Otherwise, the impulse current will be too large, and the grid voltage at the parallel point will drop instantaneously, which can cause damage to the unit. Adjust according to the deviation and control the closing time. The frequency measurement of the unit is residual voltage frequency measurement.
◆ the automation adopts good lightning protection measures. When the lightning and surge except non direct lightning are serious, the damage to the system will be minimized and will not cause fatal injury.
◆ the integrated panel is also equipped with semi-automatic power generation system: the automatic switch is switched to manual gear, one key excitation is used for excitation, one is put into standby, one is connected to the grid at the same time, and one is put into standby. The comprehensive protection and the full-automatic dual power generation system are standby for each other for emergency power generation.
◆ the requirements for the quality of the staff of the power station are not high. The automatic control panel has a simple structure, "fool design", modular integration and easy maintenance in the future. Changing a core module with plug-in type is as simple as changing a mobile phone battery.
◆ the powerful function of communication module can be configured to expand remote monitoring and control at any time.
◆ the automation panel can additionally expand the practical functions of the power station, such as cooling water, air pressure, oil level, automatic brake, automatic switching main valve, main transformer control and loss reduction.
◆ the automation adopts good lightning protection measures. When the lightning surge is serious, the damage to the system can be reduced to a lower level at most, and can be repaired quickly and at a low cost, except for direct lightning strike in the front.
