The automatic parallel and grid-connected control technology of the diesel generator set and the communication technology that realizes the “three remote* (ie remote control, telemetry and remote signaling) of the generator set and the host computer have been considered as the difficult technology in the generator set control system. Currently, Individual companies in China can only produce products with a single function. The market mainly uses imported generator sets with many controllers, but even imported products rarely meet the technical requirements of these functions at the same time. Woodward Corporation of the United States launched The EGCP-1 generator set controller is one of the few. Function description of EGCP-1 generator set controller 2.1 Parameter display function of generator set: LCD screen displays generator voltage, battery voltage, current, frequency, active power, reactive power, power factor, mains voltage (public busbar) Voltage), unit temperature, oil pressure, unit speed, running time, etc. 2.2 The monitoring display of 16 input switch measuring points and 11 output switching measuring points is convenient for maintenance and troubleshooting. 2.3 Diesel engine control: air preheating control, solenoid valve control, starter motor control, cold machine running time control, etc. 2.4 Synchronous control: The error of voltage amplitude during synchronization is adjustable between 0.1% and 10%. The phase error during synchronization is adjustable between 2% and 20%. The built-in busbar has no safety switch for self-injection. Switching time auto-reclosing, automatic re-synchronization, synchronous time-out fault control, manual synchronization operation can artificially use the external input switch to adjust speed and voltage regulation (synchronous check is still effective when manual synchronization), power generation Synchronous control of the air switch on the unit and on the mains side. 2.5 Active power control: Accurate and fast control of the load even in the presence of harmonics, smooth access and withdrawal of load control (control control rate of load can be adjusted), can allow up to 8 The vehicle unit distributes the active load proportionally according to the capacity of the unit. It can control the basic power operation mode of the best fuel efficiency at the remote control unit with the switch quantity. The external active power transmitter can be used to realize the unit input/ The output control can realize the flexible transition with the mains supply, the external load adjustment of the basic load, and the kW drop mode when the manual load control is performed. 2.6 Reactive power control: When the unit is separately networked, up to 8 parallel units can be allowed to distribute the reactive load proportionally according to the capacity of the generator. The unit can operate with constant power factor or constant reactive power. The power mode is operated, and the reactive power or power factor is externally adjustable. 2.7 genset operation sequence control: When the running capacity of the running unit exceeds the set upper limit percentage of its rated power, another unit will be automatically started; when the running capacity of the running unit is low and the rated lower limit of the rated power is At the time, the operation of one unit with lower priority is automatically unloaded and stopped; the priority operation level of the unit is adjustable. 2.8 Generator protection: high / low voltage, high / low frequency, reverse power, loss of power, over current (inverse time delay), mains power failure, speed / frequency mismatch, load shock. 2.9 Diesel engine protection: high/low unit temperature, high/low oil pressure, overspeed, start failure. 2.10 Interface with the upper PC: The software set by the host computer is transmitted to the flash memory of EGCP-1 to realize the initial configuration. The protocol can be passed through the RS422 communication port on the EGCP-1 to realize the control and monitoring of the upper PC. Generator set. Several typical applications of the EGCP-1 genset controller The EGCP-1 genset controller is powerful and can change its operating mode by changing the internal settings. The operation mode is *:002004 1 code wear-touch: ä¿: Jiangsu Taizhou State person i deputy chief engineer 'mainly engaged in generator: group system (design research 1rightsreserved, http:// four: The single-machine operation and the mains supply are not connected to the grid, the single-machine operation is connected to the mains, and the parallel operation of the multi-machines is not connected to the mains. The parallel operation of the multi-machines is connected to the mains. In the case of almost no external wiring changes, Switching the unit between different modes of operation, it is now introduced in several typical applications. 3.1 Single-machine operation and mains non-grid mode This application mode is the most basic operation mode of EGCP-1, and it is also the most widely used occasion. In this mode, the precondition for the genset running load is that the mains side air switch must be disconnected, through the mains abnormality (LOSSOFMAINS) detection or external automatic (AUTO), RUNWITHLOAD switch closing detection, To determine whether the unit is running or not. Since the unit and the mains are always not connected to the grid, there will always be short intervals when switching between mains and the unit to supply power to the load. The EGCP-1 software configures this operating mode as follows. The controller of the load control module is designated as the master, and the rest is in the automatic (AUTO) state as the slave, and the master commands the slave to start and stop. The master and slave can be set through the panel. The LCD panel on the controller can display their master-slave order. The EGCP-1 software configures this operating mode as follows. Load control mode, no check (common mode menu 9 '4-load control mode this mode, when the external AUTO input point of EGCP-1 controller is closed, once the mains power is lost, the host first disconnects the air on the mains side The switch, then all the units (the respective EGCP-1 controller operating sequence automatic control configuration is valid) is started, the first unit that reaches the power supply state first closes the corresponding outlet air switch, and the other units are automatically synchronized to the grid. If the load of the unit is lower than the lower limit of the economic load rate, the host will issue a command to command the unit with the lowest priority to be unloaded off-grid and automatically stop; if during operation, the load on the combined unit is higher than the upper limit of the economic load rate. Then the host issues an instruction to start the operation of the unit with the highest priority among the units to be started and synchronously connected to the grid. After the power is restored, the unit side air switch is first commanded to trip, and then the air switch on the listed side is connected to allow the unit to run at no load. Automatically stop afterwards. Market application prospects of EGCP-1 generator set controllers With the gradual opening up of the domestic power market, there are many opportunities for diesel generator sets to be connected to the mains. The EGCP-1 controller is characterized by its powerful functions and stable performance indicators. 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