CN201557102U

CN201557102U - Logic circuit of power grid generator set controller of ship

Info

Publication number: CN201557102U
Application number: CN2009200745019U
Authority: CN
Inventors: 李勇
Original assignee: Shanghai Ship and Shipping Research Institute Co Ltd
Current assignee: Shanghai Ship and Shipping Research Institute Co Ltd
Priority date: 2009-09-15
Filing date: 2009-09-15
Publication date: 2010-08-18
Anticipated expiration: 2019-09-15

Abstract

The utility model discloses a logic circuit of a power grid generator set controller of a ship. A power-off signal input end D1 of a power grid is connected to an input end of an AND gate B2, and connected to an input end of an AND gate B1 through a negation gate A1; a switch-on instruction input end D2 is respectively connected with the other input end of the AND gate B1 and the other input end of the AND gate B2; the output end of the AND gate B1 is connected with one input end of an OR gate E1; the output end of the AND gate B2 is connected with the input end of a negation gate A2; one path of the output end of the negation gate A2 is connected with an interlocking signal output end D3, and the other path thereof is respectively connected with an input end of an AND gate B3 and an input end of an XOR gate C1 through a negation A3; the other input end of the AND gate B3 is connected with a first interlocking signal input end D4; and two input ends of an AND B4 are respectively connected with a second interlocking signal input end D5 and a third interlocking signal input end D6. The logic circuit has simple structure and high real-time performance, does not cause difference on logic judgment; and the outputs thereof corresponds to the physical conditions in a one-to-one manner.

Description

The logical circuit of network of ship generator set controller

Technical field

The invention belongs to the Ship Electrical Power System technical field, relate in particular to the logical circuit of network of ship generator set controller.

Background technology

Ship Electrical Power System can be divided into generating, transmission, distribution and load four major parts, wherein power generation part mainly is for boats and ships provide electric energy, and it is made up of main electrical power plant, emergency power station (using on the civilian boat), storage battery (optional) and bank electricity (using when pulling in to shore) usually.Powered to each power consumption equipment by main electrical power plant when boats and ships normally navigate by water, break down at main electrical power plant, during the main busbar dead electricity, main distribution board sends the dead electricity signal to emergency switchboard, starts the emergency power station, and powers to emergency load.When boats and ships pull in to shore, by the bank electricity to the boats and ships electric.

During to mains supply, when stopping in emergency in net unit generation catastrophe failure, line voltage can descend fast be tending towards dead electricity at main electrical power plant, and should start standby unit as there being standby unit in the main electrical power plant this moment, restores electricity as early as possible, and assurance equipment normally moves.

Current, some ripe boats and ships electric energy management system products all have the dead electricity auto restore facility, and the automatic recovery method for power loss of employing mainly contains following three kinds:

First kind, during electrical breakdown, the standby startup of unit that priority is high closes a floodgate to mains supply;

Second kind, during electrical breakdown, start many standby units, the guest machine that priority is high makes up lock to mains supply;

The third during electrical breakdown, starts many standby units, and the starting winner closes a floodgate earlier, and other unit of software locking.

The shortcoming of first method is that the rapidity that network of ship restores electricity can't guarantee, second and third kind method has improved the reliability of the fast quick-recovery of electrical breakdown to a certain extent, but still can't guarantee in the shortest time, to restore electricity, in addition, the third method does not have to consider when multicomputer occurring and send out the extreme case of interlocking signal simultaneously, how to carry out the switching order adjustment, this method might can't realize reliable locking when the how standby unit of appearance is sent out interlocking signal simultaneously simultaneously.

Summary of the invention

Technical problem to be solved by this invention provides a kind of logical circuit of network of ship generator set controller to have solved many problems that unit closes a floodgate simultaneously, guarantee to close a floodgate cast net unit uniqueness, should need property.

For solving the problems of the technologies described above, the present invention adopts following technical scheme:

A kind of logical circuit of network of ship generator set controller, it is characterized in that, electrical breakdown signal input part D1 connects with the input of door B2 and through not gate A1 and is connected and the input of a B1, reclosing command input D2 respectively with another input of door B1 be connected with another input of door B2, be connected with the output of door B1 or the input of door E1; The input that is connected not gate A2 with the output of door B2, the output one tunnel of not gate A2 connects interlocking signal output D3, another road connects respectively and the input of door B3 and the input of XOR gate C1 through not gate A3, be connected the first interlocking signal input D4 with another input of door B3, be connected the second interlocking signal input D5 and the 3rd interlocking signal input D6 respectively with two inputs of door B4; With door B3 be connected two inputs with door B5 respectively with the output of door B4, be connected respectively with the output of door B5 or another input of door E1 and another input of XOR gate C1; The output of XOR gate C1 connects interlocking state flag bit D7; Or the output of door E1 is connected to closing relay J.

Adopt technique scheme, the logical circuit of network of ship generator set controller of the present invention is when electrical network has electricity, and the reclosing command of controller is directly exported by the circuit on top, drives main switch and closes a floodgate; When the electrical breakdown fault took place, the reclosing command that controller sends will could be exported through the judgement of interlock circuit.When the controller of this unit sends reclosing command, the interlocking signal of switching signal and other unit with, as do not have other controller and send reclosing command, then logic is output as " 1 ", the output switching signal drives main switch and closes a floodgate; As exist other controller to send reclosing command, then logic is output as " 0 ", wouldn't export switching signal, this information be passed to control program, redistribute reclosing command in proper order by each startup of unit by the interlocking state sign, thereby having guaranteed to close a floodgate cast net unit uniqueness, should need property, solved multicomputer and sent out the problem that interlocking signal can't reliably be finished interlocking simultaneously, this logic circuit structure is simple, the real-time height, export correspondingly one by one, can not cause the difference on the logic determines with physical state.

Description of drawings

The present invention is described in detail below in conjunction with the drawings and specific embodiments:

Fig. 1 is the logical circuit of network of ship generator set controller.

Embodiment

As shown in Figure 1, the logical circuit of network of ship generator set controller described in the utility model, electrical breakdown signal input part D1 connects with the input of door B2 and through not gate A1 and is connected and the input of a B1, reclosing command input D2 respectively with another input of door B1 be connected with another input of door B2, be connected with the output of door B1 or the input of door E1; The input that is connected not gate A2 with the output of door B2, the output one tunnel of not gate A2 connects interlocking signal output D3, another road connects respectively and the input of door B3 and the input of XOR gate C1 through not gate A3, be connected the first interlocking signal input D4 with another input of door B3, be connected the second interlocking signal input D5 and the 3rd interlocking signal input D6 respectively with two inputs of door B4; With door B3 be connected two inputs with door B5 respectively with the output of door B4, be connected respectively with the output of door B5 or another input of door E1 and another input of XOR gate C1; The output of XOR gate C1 connects interlocking state flag bit D7; Or the output of door E1 is connected to closing relay J.

Wherein, three interlocking signal input D4, D5, D6 are that the interlocking signal that other generator set controller sends is imported to the interlocking of this machine; This machine of interlocking signal output D3 interlocking signal is the interlocking output to other generator set controller; One road XOR outputs to this controller interlocking state flag bit, is used for control flow and judges that the XOR input state is described as follows:

00---this machine is not sent out reclosing command

11---this machine closes a floodgate

10---multimachine sends reclosing command

01---disarmed state

The XOR output state is described as follows:

0---consistent with reclosing command

1---the reclosing command conflict

When electrical network had electricity, the reclosing command of controller was directly exported by the circuit on top, drove main switch and closed a floodgate; When the electrical breakdown fault took place, the reclosing command that controller sends will could be exported through the judgement of interlock circuit.When No. 1 controller sends reclosing command, the interlocking signal of switching signal and other unit with, as do not have other controller and send reclosing command, then logic is output as " 1 ", the output switching signal drives main switch and closes a floodgate; As exist other controller to send reclosing command, then logic is output as " 0 ", wouldn't export switching signal, by the interlocking state sign this information is passed to control program, redistributes reclosing command in proper order by each startup of unit.

This circuit structure is simple, and the real-time height is exported correspondingly one by one with physical state, can not cause the difference on the logic determines.

Logical circuit described in the utility model is the design of carrying out at 4 units, for the unit of other quantity when the design, only need to increase or reduce the interlocking signal input, and these interlocking signals only need the signal of NAND gate A3 output to carry out and computing, and then export to XOR gate C1 and or door E1.

But, those skilled in the art will recognize that, above-mentioned embodiment is exemplary, be in order better to make those skilled in the art can understand this patent, can not be interpreted as it is the restriction that this patent is comprised scope, so long as according to spirit that this patent discloses done anyly be equal to change or modify, all fall into the scope that this patent comprises.

Claims

1. the logical circuit of a network of ship generator set controller, it is characterized in that, electrical breakdown signal input part D1 connects with the input of door B2 and through not gate A1 and is connected and the input of a B1, reclosing command input D2 respectively with another input of door B1 be connected with another input of door B2, be connected with the output of door B1 or the input of door E1; The input that is connected not gate A2 with the output of door B2, the output one tunnel of not gate A2 connects interlocking signal output D3, another road connects respectively and the input of door B3 and the input of XOR gate C1 through not gate A3, be connected the first interlocking signal input D4 with another input of door B3, be connected the second interlocking signal input D5 and the 3rd interlocking signal input D6 respectively with two inputs of door B4; With door B3 be connected two inputs with door B5 respectively with the output of door B4, be connected respectively with the output of door B5 or another input of door E1 and another input of XOR gate C1; The output of XOR gate C1 connects interlocking state flag bit D7; Or the output of door E1 is connected to closing relay J.