SU656153A1 - Device for automatic control of voltage with controlling the sharing of load among parallel-operating generators - Google Patents

Description

The invention relates to the field of electrical engineering and is intended for automatic voltage regulation with load balancing of electric machine generators of autonomous power stations (for example, in ships).

A device for automatic voltage regulation with load balancing of parallel operating generators I is known. However, this device does not provide sufficient accuracy for the distribution of loads.

Of the known devices, the closest in technical essence to the present invention is the device described in 2.

This device for automatic voltage regulation with load balancing in parallel operating generators contains a voltage setting block whose output is connected to relay elements, a generator load cell sensor, a generator selection block with an extreme load current, the input of which is connected to the load sensor block output, relay and key elements according to the number of generators, with the outputs of the relay elements connected to the inputs of the corresponding elements, the inputs of the generator selection block with extreme na1ruzki eye included in the second inputs of the key elements, and the outputs are key elements for connection to the generator field winding.

However, this device has a weakness. When working offline

power plants (for example, ship stations) the inclusion of generators for parallel operation is not always used, i.e. any of the system generators can be operated. In this case, it is necessary to connect the relay element associated with the entire control system to a separate generator, disconnecting it from the rest. When the relay element fails, the system becomes inoperative, which will sharply decrease its reliability. In addition, the presence of autonomous relay elements is necessary when simultaneous operation of single generators for different sizes.

Claims (2)

Therefore, most of the time at ship power plants, relay elements, reagent iia) of the network, are installed on the voltage regulators of each generator. However, it is necessary to switch on generators for parallel operation and to allow control from one pe.iefi element. The object of the present invention is to increase the reliability of the device and expand its functionality by using one of the generators as the lead. The goal has been achieved in a device for automatic control of voltage with load balancing parallel generators, containing a voltage command block, a generator load cell block, a generator selection block with an extreme load current, the input of which is connected to the output of the load cell block, relay and key elements the number of generators, with the output voltage of the relay elements connected to the inputs of the corresponding key elements, the outputs of the generator selection unit with extra current per manual ultrasonic inspection includes the second inputs of the key elements and key element VEYAHODY serve for connection to the generator field winding. A new device is that it is equipped with a second voltage setting unit and a switching unit for relay elements, the first input of which is used to connect to the generator voltage niches, the second input is connected to the output of the first voltage setting unit, the third input is connected to the auxiliary output block generator with extreme current, and the fourth is connected to the output of the relay element of the master generator, and the outputs of the switching unit are connected to the inputs of the relay elements of the slave generators, and the second The voltage setting unit is connected to the first input of the relay element of the master oscillator, the second input of which serves to connect the generator voltage. The drawing shows the block diagram of the device for three parallel generators. The device contains generators 1, 2, 3, the outputs of the corresponding key elements 4, 5, 6 are connected to the output windings of the exciter, the first inputs of each of which are connected to the outputs of the relay elements 7, 8, 9. The input of the relay element 7 generator 1, ispolzuemo1CH) as a master, connected to the output of the voltage setting device 10. The inputs of the relay elements 8 and 9 are connected to the outputs of the switching unit 11. The inputs of the switching unit are connected to the generator voltage buses, with the output of the relay element 7 of the master generator 1, s output block selection for generators with an extreme current 12 and output 13. The voltage setpoint selection input unit 12 connected to the output unit 14 loads sensors generators. The outputs of the block of choice 12 are connected to the second inputs of the key elements. The system works as follows. In a single operation of generators 1, 2, 3, relay elements 7, 8, 9 are used, respectively, acting on the first inputs of keys 4, 5, 6. When only generator 1 is operating, its relay element 7 reacts to the deviation of the current direction from The operation of the job Lz, generated by the voltage control unit 10, generates a signal to the key 4, which enables or disables the excitation of the generator 1. In this case, there is no signal at the output of the selection function block. When the generators are switched on for parallel operation, the load transducer block 14 receives signals on the functional selection block 12, which selects a generator with an extreme load current depending on the current voltage value on the plugs. When the mains voltage is b le, the generator is selected with the lowest load current, and with a mains voltage greater than b, the generator with the highest load current is selected. From the outputs of the function block 12, the corresponding signals are sent to the second inputs of the keys, locked, or released; 1, the excitation of the generators. Simultaneously with the first impulses of the block 12 acting on the keys, the output of block 12 receives a signal to the third input of the switching unit of the relay elements 11, which switches all the relay elements of the master oscillators to the master) for control from the relay element (for example, the trigger Schmidt) leading generator. In the drawing, the switching on is shown when the leading heater 1, i.e., the relay elements 8 and 9 are connected to the output of the relay element 7. The voltage command unit 10 is switched off in parallel operation. The switching unit of relay elementov 1 1 can be executed both on electromechanical relays, and on contactless 1-1b x elementov with l o g p and pe re k clu n e. The applicability of the proposed device allows the use of a relay element of a generator running on it, for all generators operating in parallel. For single operation, their own relay cells are used. If necessary (in the event of an accident or the desire to ensure uniform wear of all generators), any other generator can be taken as lead generator. In addition, the presence of autonomous relay elements is necessary when simultaneous operation of single generators on different ups. Thus, the use of the device improves the reliability of the control system and recognizes its functionality. The invention The device for automatic voltage regulation with load balancing of parallel generators, containing a voltage setting block, a generator load sensors block, a generator selection block with an extreme load current, the input of which is connected to the output of a load sensor block, relay and key elements according to the number of generators In particular, the outputs of the relay elements are connected to the inputs of the corresponding KOTYUCH elements, the outputs of the generator selection unit with an extreme load current are turned on They are connected to the second inputs of key elements, and the outputs of key elements are used to connect to the excitation winding of the generator, characterized in that, in order to improve reliability and enhance functionality by using one of the generators as a master, the device is equipped with a second voltage setting unit and block switching relay elements, the first input of which serves to connect to the generator voltage buses, the second input is connected to the output of the first voltage setting unit, the third input is a switch n to the additional output of the generator selection unit with extreme current, and the fourth is connected to the output of the relay, the first generator of the master generator, the outputs of the switching unit are connected to the inputs of the relay elements of the slave generators, and the output of the second block of the relay element of the master generator , the second input of which is 1, needs to be connected to the generator voltage. Sources of information taken into account during the examination 1. USSR author's certificate LS 389595, cl. H 02 L 3/46, 1970. 2. USSR author's certificate in accordance with the Lch application; 1830465/07, cl. H 02 J 3/46, 1972.