CN2128436Y - Pulse type automatic generating controller for thermal power plant - Google Patents
Pulse type automatic generating controller for thermal power plant Download PDFInfo
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- CN2128436Y CN2128436Y CN 92224916 CN92224916U CN2128436Y CN 2128436 Y CN2128436 Y CN 2128436Y CN 92224916 CN92224916 CN 92224916 CN 92224916 U CN92224916 U CN 92224916U CN 2128436 Y CN2128436 Y CN 2128436Y
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Abstract
The utility model relates to a pulse type automatic power generating controller for the heat power plant, which comprises a local/remote control and elevation control circuit, an upper/lower limit force output setting and locking circuit, a pulse overlong protective circuit, a signal display circuit, a power supply circuit, a surface shell, a shell body, etc. The device can receive the pulse generated by the computer of the dispatch center. The synchronous motor of speed regulation of the speed regulating system of the generator is driven by the digital power level outputted by the controlled silicon after the signal processing in order to obtain the preset force output of the machine set. The utility model enables the dispatch and operating people can timely observe the operating situation of the device to guarantee the load center to conduct economic control to the dispatch in order to realize the economic load dispatch of the entire power network.
Description
The utility model relates to a kind of control device, particularly a kind of pulse-type automatic power-generating controller for use in heat-engine plant.
Do not find the technology similar in the prior art as yet to this device.
The purpose of this utility model is to avoid above-mentioned the deficiencies in the prior art part and a kind of power ascending, descending pulse command that the load dispatching centre master computer directly sends that is used to receive is provided, go the regulator generator group to exert oneself, thereby realize the pulse-type automatic power-generating controller for use in heat-engine plant of power system load Automatic Frequency Control.
The purpose of this utility model can reach by following measure: the utility model comprises power circuit; panel; rear board; housing; it is characterized in that: also have locality/distant place control and control lifting circuit; on/lower limit exerts oneself and adjusts and exclusive circuit; the long protective circuit of pulse; signal display circuit; locality/distant place control and control lifting circuit receive the pulse signal of sending here from a distant place, control centre RTU terminal; it is exported one the tunnel and exerts oneself with last/lower limit and to adjust and exclusive circuit joins; one the tunnel joins with the long protective circuit of pulse; one the tunnel delivers to signal display circuit; one the tunnel delivers to the generator syncmotor; also have one the road to send distant place RTU terminal back to; on/lower limit exerts oneself and adjusts and locality/distant place control and control lifting circuit are sent in the output one tunnel of exclusive circuit back to; signal display circuit is delivered on another road; locality/distant place control and control lifting circuit are sent in the output one tunnel of the long protective circuit of pulse back to, and signal display circuit is delivered on another road.
The purpose of this utility model can also reach by following measure: panel is divided into power panel plug-in unit WY, signal plate plug-in unit XH, control board plug-in unit KZ, baffle plug-in unit BH four parts; mains switch K1, K2, power supply indicator XD1, XD2 are housed on power panel plug-in unit WY; on signal plate plug-in unit XH, indicator light XD3, XD4, XD5 are housed; potentiometer BK1, BK2 and the diverter switch P of belt switch are housed on control board plug-in unit KZ, on the panel of baffle plug-in unit BH indicator light XD6 are housed.In the power circuit, after the contact Q2 of terminal and locality/distant place control and control lifting circuit relay electrical equipment Q joins, grid by R12, W3 and controllable silicon G1 joins again, after the contact L2 of terminal and relay L joins in the power circuit again the grid by R12, W3 and controllable silicon G2 join.On/lower limit exert oneself adjust and exclusive circuit in potentiometer W1 and R21～R23, the W2 series connection, connect 12 pin of operational amplifier F1 by leading up to R24 behind the potentiometer with switch BK1, another road connects 3 pin of operational amplifier F2 by R23,7 pin of F2 connect the base stage of diode T1 by R20, the collector electrode of T1 is connected with the coil of relay J, potentiometer W3 and resistance R 32～R34, the W4 series connection, join by leading up to 3 pin of R35 and operational amplifier F2 behind the potentiometer with switch BK2, another road connects 2 pin of operational amplifier F4 by R36,7 pin of F4 connect the base stage of triode T2, the coil tandem of the collector electrode of T2 and relay H by R40.Terminal 4,10,13 is connected to the controllable silicon major loop of terminal 5,12,16 in the power circuit respectively in the long protective circuit of pulse; 4 ends of transformer BHB connect the base stage of triode T3 by diode D23, R54; the emitter-base bandgap grading of T3 connects 2 ends of capacitor C 15 and operational amplifier F2 by potentiometer W7, R56; 3 ends of F7 connect the base stage of T4, the coil tandem of the collector electrode of T4 and relay ZJ by R63.
The pulse signal that this device receives is from the distant place RTU terminal 9 of control centre, comprises power ascending, descending instruction, and computer is being controlled/stopped in the control instruction and transferring four kinds of signals of main frame energy management system state.Simultaneously through RTU with upper and lower limit power adjust, on/lower limit switches locking, the plant failure locking, the five kinds of improving backhauls in locality/distant place are given the control centre.The pulse that this device receiving computer sends is after signal processing, and the synchronous variable-speed motor 10 by controllable silicon output digit pulse level driving generator governing system removes to regulate unit output by syncmotor then.
Fig. 1 is a functional-block diagram of the present utility model;
Fig. 2 is a contour structures schematic diagram of the present utility model;
Fig. 3 is the utility model rear board schematic diagram;
Fig. 4 is the electrical schematic diagram of power circuit;
Fig. 5 is the electrical schematic diagram of locality/distant place control and control lifting circuit;
Fig. 6 exerts oneself for last/lower limit and adjusts and the electrical schematic diagram of exclusive circuit;
Fig. 7 is the electrical schematic diagram of the long protective circuit of pulse.
The utility model is described in further detail below in conjunction with accompanying drawing (embodiment):
With reference to Fig. 1～Fig. 3, the utility model by the control of a locality/distant place and control lifting circuit 1, on/lower limit exerts oneself and adjusts and exclusive circuit 2, the long protective circuit 3 of pulse, signal display circuit 4, power circuit 5, panel 6, rear board 7, housing 8 etc. are formed.
Four blocks of plug-in units are arranged on this device front panel 6, power on light XD1, XD2 and control switch K1 are housed on the WY plug-in unit, controllable silicon output loop and K switch 2 and corresponding power safety pipe RD1～RD3; Computer is arranged at control signal lamp XD3, power ascending, descending signal lamp XD4, XD5 on the XH plug-in unit; On the KZ plug-in unit, there is upper and lower limit to exert oneself and adjusts, on potentiometer BK1, BK2 reach/lower limit switching latch buttons P; Protection actuating signal indicator light XD6 is arranged on the BH plug-in unit, and all there is an instrument connection 11 that test usefulness is provided the below of XH, KZ, BH plate.
In addition, on this device rear board, the lead-out wire of 2 24 pin sockets 12 is arranged, these lead-out wires are connected to the binding post of power plant, above-mentioned whole signals can be presented on the power generator control desk, and pass through the console switch 22K of power plant, realize the distant place control of generator output.
The function of this device
One, controlled function (KZ plug-in unit)
When generator is in computer " distant place " control, the receiving scheduling central host through the unit that master computer automatic generation control (AGC) software sends in line computation " increase ", " subtracting " Load Regulation pulse command, and it be transformed into the receivable controlled quentity controlled variable of gas turbine governing system go exerting oneself of regulator generator.
Two, defencive function (BH plug-in unit)
1. unit output upper and lower limit protection: the upper limit value and lower limit value of adjusting unit output by the actual condition of generator; thereby the power that has that guarantees generator is adjusted in this scope; gauge device meeting automatic blocking " increases ", " subtracting " pulse if surpass, thereby guarantees the safe operation of unit.
2. " controllable silicon fault " or the long protection of pulse when the controllable silicon fault punctures or causes the control pulsewidth to surpass definite value because of other reasons, can be cut off the governor motor power supply automatically, prevents from that unit from crossing to be in harmonious proportion to burn out the motor coil winding.
Three, limit value foldback function: with on-site generated power machine active power upper and lower limit setting value through RTU foldback readjustment degree center; its host computer function is sent by this definite value scope increase, subtract the regulating impulse instruction, the adjusting of guaranteeing generator output is subjected to the duplicate protection of dispatching host machine and local device.
Four, signal Presentation Function
1. when the protection action, send " locking " signal to control centre and power station attendant.
2. when installing the working power fault, signal to control centre and power station attendant.
3. the status signal whether control centre's energy management system (ENS) automatic generation control (AGC) is put into operation is transferred to the scene, and the electric power supply plant operator on duty understands the operation conditions of control centre's main frame.
4. send signal to the control centre when changing the upper and lower limit definite value at the scene, to prevent that computer is received wrong information in the bound definite value setting process.
Five, manual priority function
When generator is in " AGC " mode, when personnel on duty find that generator has abnormal conditions to need emergency treatment, in the time of can be as normal operation, regulating handle 2ZK regulator generator by the active power on the manual operation discovery machine control desk exerts oneself, this moment, this device was deactivated automatically, realized manual priority.
With reference to Fig. 4, K1, K2 mains switch are contained on the WY plug-in unit of panel 6, K1 is closed, the 220V AC power is through transformer B, four secondary output windings are arranged, and wherein two through rectifier bridge, capacitor C 1～C6 and integrated voltage-stabiliser tube μ pc7812, behind the μ pc7912, provide respectively package unit working power+12V direct current and-12V direct current (standby).Two coils after the C8 rectification, are controllable silicon G1 through capacitor C 7 in addition, and G2 provides triggering level, terminal " 3 ", " 4 " to be connected to " " adding " impulse contact Q2, terminal " 10 ", " 9 " are connected to " subtracting " impulse contact L2.When Q2 or L2 connection, " adding ", " subtracting " triggering level are provided for G1, G2, terminal " 11 ", " 12 ", " 15 " are connected to the power generator control desk, " adding ", " subtracting " light indication power supply are provided, hold and be connected to governing system syncmotor locality/distant place control switch 2K(in " 5 ", " 12 ", " 16 " and hold) in power plant, the syncmotor working power is provided, terminal " 13 ", " 14 " are connected to the normally closed contact ZJ2 of blocking relay ZJ, during operate as normal, this contact is connected.K2 closes, and gives controllable silicon G1, and the ac main circuit of G2 provides power supply, and RD1～RD4 is a protective tube.
With reference to Fig. 5, this circuit is divided into signal plate plug-in unit (XH) and control board plug-in unit (KZ) two parts.In signal plate plug-in unit (XH), " computer is in control " signal is by relay B, and signal lamp XD3 forms.Hold in " 22 " and be connected to " in control " contact of sending to RTU from control centre's master computer, when this contact is connected, relay B action, the B1 contact closes, and XD3 sends steady light, and promptly the XD3 lamp on the panel 6 is bright.The B2 contact also closes simultaneously, and " computer is in the control " indicator light that is connected to power plant's control desk (at power plant's end) through terminal " 21 " is also bright.
" computer is not controlled " and " flash circuit " is made up of A relay and FA, FB, AC relay.When terminal " 3 " receives from " not controlling " signal that computer is sent, the A actuating of relay, A2 contact are connected, and through normally closed contact FB2 and terminal " 16 " this signal are delivered to indicator light on power plant's control desk, " computer is not controlled indicator light " is bright, meanwhile the A1 contact is also connected, through normally closed contact AC1, FA1, relay FA action connection point FB2 disconnects, indicator light extinguishes, and the FB1 normal opened contact closes simultaneously, relay FA action, contact FA1 disconnects, the FB relay electric-loss is failure to actuate, and normally closed contact FB2 involution is in on-position, at this moment, indicator light is bright again, therefore, and the flash state that " computer is not controlled " puts out when bright when indicator light is in.The controlled amount system flash time interval of capacitor C 9, C10, terminal " 4 ", " 20 " are connected to the button of power plant's control desk, and when pressing this button, relay AC connects through contact A1, action.The AC1 contact closes, and with FA, FB two relay circuits disconnect, though this moment with push-button reset, but the AC relay through the self-sustaining of AC1 contact in on-state.The AC2 contact also closes simultaneously, and indicator light is through A2, and the AC2 contact sends steady light.
" add ", " subtracting " pulse signal indicator light XD4, XD5 are connected to " adding " impulse contact Q3 and " subtracting " impulse contact L3 respectively through terminal " 8 ", " 9 ".When Q3 or L3 connected, indicator light was bright, and promptly the XD4 on the plate face 6, XD5 indicator light are bright.
" working power fault " indicator light is made up of relay B, when 12V working power fault, and relay E dead electricity, normally closed contact E1, E2 connect, " power failure " indicator light that E1 connects on power plant's control desk is bright, and E2 connects, with power failure signal through RTU foldback readjustment degree center.Diode in this plug-in unit plays the effect of protection relay coil.
In control board plug-in unit (KZ) " adding ", " subtracting " pulse control loop, generator syncmotor 10 receives " adding ", " subtracting " pulse of sending from the control centre, is mainly realized by relay Q and L.When computer sends " adding " or " subtracting " pulse, deliver to terminal " 4 " or " 21 " by RTU, through J1, L1 or H1, Q1 normal opened contact, relay Q or L action.When " adding " pulse circuit Q actuating of relay, normally closed contact Q1 opens, and will " subtract " pulse circuit relay L and disconnect, and this moment, device can only be operated in " adding " pulse condition, and will " subtract " the pulse circuit locking, and vice versa.After the relay Q action, the Q3 contact is connected through terminal " 11 " and is connected to terminal " 8 " on the signal plate XH plug-in unit, make " adding " the pulse signal lamp XD4 on the plate face bright, the Q2 contact is connected simultaneously, be connected to " 3 ", " 4 " terminal on the power circuit through terminal " 3 ", " 5 ", at this moment, the DC loop of controllable silicon G1 on the power circuit has " adding " pulse-triggered level, controllable silicon G1 conducting, go to drive synchronous variable-speed motor 10 forward rotation through terminal " 5 ", " 12 ", thereby unit output is increased.Equally, when the L actuating of relay of subtract pulse loop, operation principle is the same.At this moment, L3 closes, XD5 indicator light on the connection signal plate XH, the XD5 lamp is bright on the plate face 6, and L2 also closes simultaneously, and " subtracting " pulse-triggered loop of the controllable silicon G2 DC loop on the power circuit is connected through terminal " 10 ", " 9 ", controllable silicon G2 conducting under the effect of " subtracting " impulse level, go to drive syncmotor 10 backward rotation through terminal " 16 ", " 12 ", thereby unit output is reduced, " adding ", the response time of " subtracting " pulse in whole process are no more than 0.1 second.
With reference to Fig. 6, by resistance W1, W2, R20～R23, operational amplifier F1 and capacitor C 11 are formed upper limit rectification circuit, and be divided into fourth gear: 80%Pe, 90%Pe, 100%Pe, 110%Pe(Pe are the rated value of unit output), its corresponding voltage value is respectively 4V, 4.5V, 5V, 5.5V.This value is sent to RTU through terminal " 8 ", returns to control centre's master computer.
By resistance W3, W4, R31～R34, computing amplifier F3 and capacitor C 12 formed the lower limits circuit of adjusting, and be divided into fourth gear: 50%Pe, 60%Pe, 70%Pe, 80%Pe, its corresponding voltage value is respectively 2.5V, 3V, 3.5V, 4V.This value is sent to RTU through terminal " 17 ", returns to control centre's master computer.
When the scene need change the upper and lower limit setting value, level disturbed and makes computer receive error message when avoiding switching, and was provided with on KZ plate face and switched latch buttons P.As long as press P when switching, through terminal " 13 ", " 14 ", computer is the lockable information of receiving, and is not chaotic to guarantee the original data of computer.
By operational amplifier F2, switch triode T1, the real active power Ps of sending out of generator that relay J and power transducer are sent here through terminal " 15 " forms upper limit latch-up protection circuit.When the real power P s of sending out surpasses upper limit setting value, be that the level of F2 input " 2 " pin is during greater than the level of " 3 " pin, F2 exports high level, the T1 conduit, the J action, normally closed contact J1 disconnects, and locking " adds " the relay Q of pulse circuit, generator is no longer increased exert oneself, through terminal " 6 " signal is delivered to power plant's control desk simultaneously.
By operational amplifier F4, switch triode T2, relay H and the real power P s of sending out form lower limit latch-up protection circuit.When a real power P s is lower than the lower limit setting value, be that the level of F4 input " 3 " pin is during less than the level of " 2 " pin, F4 exports high level, the T2 conducting, the H action, normally closed contact H1 is disconnected can be opened, and locking " subtracts " the relay L of pulse circuit, generator is no longer reduced exert oneself, through terminal " 6 " signal is delivered to power plant's control desk simultaneously.
Upper and lower limit is adjusted and is protected exclusive circuit to realize the tracking of control centre's master computer to on-the-spot unit output.
With reference to Fig. 7, by transformer BHB, triode T3, T4, capacitor C 15, operational amplifier F7, relay ZJ form the protection major loop.
Terminal " 4 ", " 10 ", " 13 " are connected to terminal " 5 ", " 12 " of power circuit, the controllable silicon major loop of " 16 " respectively.Can adjust W7 when the continuous ON time of controllable silicon according to field condition above this time of 450ms(adjusts) time; the T3 conducting; to capacitor C 15 chargings; when homophase "+" the end level of resistance R 61 input F7 is imported the level of F7 anti-phase "-" end greater than the potentiometer W8 that adjusts; F7 exports high level; the T4 conducting, the ZJ action, the protection XD6 lamp on the plate face is bright.Its contact ZJ2(normally closed contact) disconnect (terminal " 13 ", " 14 " that are power circuit disconnect), the SCR AC major loop disconnects, and package unit withdraws from automatically, and ZJ1 closes simultaneously, with block signal foldback readjustment degree center.ZJ4 closes, and makes the locking indicator light on power plant's control desk bright.
The charging and discharging circuit that resistance W7, R56 and capacitor C 15 are formed has determined the output of operational amplifier F7 to be become the flip-flop transition of high level by low level.
When device is in " distant place " when controlling automatically, terminal " 17 " connection+12V power supply, in case on-the-spot the needs manually intervene, the operator on duty with the T4 shorted on both ends, makes the ZJ actuating of relay through terminal " 22 " by the 2ZK switch of operation site, and self-sustaining, this device is deactivated.
The utility model has following advantage compared to existing technology:
1. this device adopts safe and reliable technology, the pulse that receiving computer sends, after signal is processed, driven the synchronous variable-speed motor of Generator Governor by controllable silicon output digit pulse level, remove to regulate unit output by syncmotor then, thereby reach predetermined unit output, by the adjusting of unit output, can realize the automatic control of Guangdong power system LOAD FREQUENCY.
2. can make scheduling and operations staff can both in time understand the ruuning situation of device, guaranteed that load dispatching centre can be according to the ruuning situation of power plant's reality, by host computer software in line computation, load is carried out economy control, thereby realizes the economic load dispatching of full electric network.
Claims (5)
1; a kind of pulse-type automatic power-generating controller for use in heat-engine plant; comprise power circuit 5; panel 6; rear board 7; housing 8; it is characterized in that: also have locality/distant place control and control lifting circuit 1; on/lower limit exerts oneself and adjusts and exclusive circuit 2; the long protective circuit 3 of pulse; signal display circuit 4; locality/distant place control and control lifting circuit 1 receive the pulse signal of sending here from a distant place, control centre RTU terminal 9; it is exported one the tunnel and exerts oneself with last/lower limit and to adjust and exclusive circuit 2 joins; one the tunnel joins with the long protective circuit 3 of pulse; one the tunnel delivers to signal display circuit 4; one the tunnel delivers to generator syncmotor 10; also have one the road to send distant place RTU terminal 9 back to; on/lower limit exerts oneself and adjusts and locality/distant place control and control lifting circuit 1 are sent in the output one tunnel of exclusive circuit 2 back to; signal display circuit 4 is delivered on another road; locality/distant place control and control lifting circuit 2 are sent in the output one tunnel of the long protective circuit 3 of pulse back to, and signal display circuit 4 is delivered on another road.
2, control device according to claim 1; it is characterized in that: panel 6 is divided into power panel plug-in unit WY, signal plate plug-in unit XH, control board plug-in unit KZ, baffle plug-in unit BH four parts; mains switch K1, K2, power supply indicator XD1, XD2 are housed on power panel plug-in unit WY; on signal plate plug-in unit XH, indicator light XD3, XD4, XD5 are housed; potentiometer BK1, BK2 and the diverter switch P of belt switch are housed on control board plug-in unit KZ, on the panel of baffle plug-in unit BH indicator light XD6 are housed.
3, control device according to claim 1, it is characterized in that: in the power circuit 5, after the contact Q2 of terminal 3,4 and locality/distant place control and control lifting circuit 1 repeat circuit Q joins, grid by R12, W3 and controllable silicon G1 joins again, after the contact L2 of terminal 9,10 and relay L joins in the power circuit 5 again the grid by R12, W3 and controllable silicon G2 join.
4, control device according to claim 1, it is characterized in that: on/lower limit exert oneself adjust and exclusive circuit 2 in potentiometer W1 and R21～R23, the W2 series connection, connect 12 pin of operational amplifier F1 by leading up to R24 behind the potentiometer with switch BK1, another road connects 3 pin of operational amplifier F2 by R23,7 pin of F2 connect the base stage of diode T1 by R20, the collector electrode of T1 is connected with the coil of relay J, potentiometer W3 and resistance R 32～R34, the W4 series connection, join by leading up to 3 pin of R35 and operational amplifier F2 behind the potentiometer with switch BK2, another road connects 2 pin of operational amplifier F4 by R36,7 pin of F4 connect the base stage of triode T2, the coil tandem of the collector electrode of T2 and relay H by R40.
5, control device according to claim 1; it is characterized in that: terminal 4,10,13 is connected to the controllable silicon major loop of terminal 5,12,16 in the power circuit 5 respectively in the long protective circuit 3 of pulse; 4 ends of transformer BHB connect the base stage of triode T3 by diode D23, R54; the emitter-base bandgap grading of T3 connects 2 ends of capacitor C 15 and operational amplifier F2 by potentiometer W7, R56; 3 ends of F7 connect the base stage of T4, the coil tandem of the collector electrode of T4 and relay ZJ by R63.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92224916 CN2128436Y (en) | 1992-06-18 | 1992-06-18 | Pulse type automatic generating controller for thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92224916 CN2128436Y (en) | 1992-06-18 | 1992-06-18 | Pulse type automatic generating controller for thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2128436Y true CN2128436Y (en) | 1993-03-17 |
Family
ID=33769896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92224916 Expired - Fee Related CN2128436Y (en) | 1992-06-18 | 1992-06-18 | Pulse type automatic generating controller for thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2128436Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066903A (en) * | 2012-12-31 | 2013-04-24 | 广州广重企业集团有限公司 | Generator load self-adaptation adjustment device |
-
1992
- 1992-06-18 CN CN 92224916 patent/CN2128436Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066903A (en) * | 2012-12-31 | 2013-04-24 | 广州广重企业集团有限公司 | Generator load self-adaptation adjustment device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |