CN103378784B - Load command dynamic compensation method and system - Google Patents
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Abstract
The invention relates to a load command dynamic compensation method and system. The method includes the steps of receiving a target load command LDC2 output by a load command LDC1 after passing through a communication network and remote terminal equipment, and performing differential operation on the LDC2 to generate a command variation; if the absolute value ABS of the command variation changes, receiving the value of the difference between an actual load command LDC3 and the LDC2, wherein the difference value is generated after the LDC2 undergoes rate limitation; performing amplitude limiting on the difference value to generate an amplitude limiting value delta; obtaining the amplitude limiting result of the command variation, and multiplying the amplitude limiting result by the delta to generate a dynamic accuracy compensation value; inputting the dynamic accuracy compensation value into an input end of a power regulator of a CCS control unit to perform dynamic accuracy compensation, and after limiting the amplitude of the dynamic accuracy compensation value, inputting the dynamic accuracy compensation value into an output end of the power regulator to perform fast dynamic compensation.
Description
Technical field
The invention relates to thermal power generating technology, particularly about automatic generation control (the Automatic Generation Control AGC) technology of thermal power generation unit, is about a kind of load command dynamic compensation method and system concretely.
Background technology
AGC technology ensures power grid security economical operation, improves one of important measures of operation of power networks level, the safety and stability level of generating set AGC characteristic appreciable impact system, the important content that Shi Wang factory is coordinated.Under the situation of national network, for improving electrical network AGC running quality, guarantee tie--line control level between frequency quality of power grid and net, since 2008, regional electricity prison office puts into effect " factory's assistant service management implementation detailed rules and regulations of generating electricity by way of merging two or more grid systems " and " power plant be incorporated into the power networks management implementation detailed rules and regulations " of one's respective area in succession, economy examination is carried out to generating set AGC performance, proposes requirements at the higher level for AGC Control platform index.
For improving the AGC ability of thermal power generation unit, at present, in prior art, generally follow following principle:
(1) CCS side designing requirement: adopt scattered control system (DCS) and there is unit cooperative and control and the unit of AGC function, for meeting the requirement of AGC Control platform, " stove is with machine " CCS control model must be selected, namely take load responding faster steamer pusher side carry out power adjustments, and the slower boiler side of load-responsive carries out the main vapour pressure of unit and control of steam temperature.CCS side completes cooperation control pattern and switches and carry out power adjustments, the instruction of output integrated valve position.Thermal power generation unit AGC typical control circuit as shown in Figure 1.
(2) DEH side designing requirement: unit completes AGC control function of power jointly by DEH, CCS.DEH side operates in control of valve position mode under unit cooperative control model, and DEH accepts CCS and controls the instruction of output integrated valve position.Each adjuster valve, according to the action of rating curve response comprehensive valve bit instruction, finally completes the real task of sending out power response machine unit scheduling load instruction.
By above design, generating set can in time, accurate response scheduling load instruction, high-quality electric energy is provided.
Inventor is realizing in process of the present invention, finds at least there is following deficiency in prior art:
The load instruction LDC1 that traffic department sends exports 4-20mA signal through the computing of network service and remote control device (RTU), the target load instruction LDC2 that final unit DCS control system receives, as the AGC instruction of side of generating set, its signal inherently has certain delaying and decay compared with load instruction LDC1, as shown in Figure 2.Real-time and the accuracy of final unit real power response scheduling load are poor.
Although this design achieves the AGC function of unit, but significantly changing to prevent the moment of the dispatch command received causes unit accumulation of heat to be lost in a large number suddenly, finally affect unit safety stable operation, the AGC typical control circuit of Fig. 1 devises load " rate limit " module, therefore the dispatch command of any form (generally including step and ramp signal) is all subject to its rate limit, thus has a strong impact on unit load change response time index.
Such as, certain 1000MW machine unit scheduling instruction LDC1 rises to 800MW in the T1 moment by 600MW step, and unit receives instruction LDC2 and is then slowly changed to the instruction being slightly less than 800MW in the T2 moment, there is delayed and decay.
Again such as, certain generating set, at 600MW load condition, carries out 200MW load up upset test, contrasts unit load instruction steady state deviation 4MW through scheduling side signal LDC1 and Generation Side signal LDC2, disturbance moment instruction deviation is larger, and the load instruction response lag time reaches 3 seconds.
Summary of the invention
The invention provides a kind of load command dynamic compensation method and system, to improve control precision and the response time of unit AGC.
To achieve these goals, the invention provides a kind of load command dynamic compensation method, the method comprises: receive the target load instruction LDC2 that exports after communication network and RTU (remote terminal unit) RTU of load instruction LDC1, and differentiates to described LDC2 and generate instruction variable quantity; If the absolute value ABS of described instruction variable quantity changes, receive the difference of actual load instruction LDC3 and the described LDC2 generated after described LDC2 carries out rate limit, to described difference amplitude limiting processing, generate amplitude limit value △; Obtain the amplitude limiting processing result of described instruction variable quantity, and described amplitude limiting processing result and △ are carried out multiplication operation, generate dynamic accuracy offset; The input that described dynamic accuracy offset is input to the power governor of CCS control unit is carried out dynamic accuracy compensation, and the output being input to described power governor after described dynamic accuracy offset amplitude limit is carried out dynamically compensate fast.
Further, by described dynamic accuracy offset amplitude limit, comprising: obtain the comprehensive valve bit instruction aperture Z of unit at specified main steam pressure and at full capacity under operating mode; Be 2%Z by described dynamic accuracy offset amplitude limit.
Further, the amplitude limiting processing result of described instruction variable quantity is 2%Pe.
Further, to described difference amplitude limiting processing, generate amplitude limit value △, comprising: to described difference amplitude limiting processing, make, when described instruction variable quantity amplitude limit is 2%Pe, to reach maximum amplitude limit △=1.
To achieve these goals, present invention also offers a kind of load instruction dynamic compensating system, this system: instruction variable quantity generation unit, for receiving the target load instruction LDC2 that load instruction LDC1 exports after communication network and RTU (remote terminal unit) RTU, and described LDC2 is differentiated generate instruction variable quantity; Difference clipping unit, for receiving the difference of actual load instruction LDC3 and the described LDC2 generated after described LDC2 carries out rate limit, to described difference amplitude limiting processing, generates amplitude limit value △; Offset generation unit, for obtaining the amplitude limiting processing result of described instruction variable quantity, and carries out multiplication operation by described amplitude limiting processing result and △, generates dynamic accuracy offset; Dynamic compensation unit, input for described dynamic accuracy offset being input to the power governor of CCS control unit carries out dynamic accuracy compensation, and is carried out by the output being input to described power governor after described dynamic accuracy offset amplitude limit dynamically compensating fast.
Further, described dynamic compensation unit comprises: accuracy compensation module, carries out dynamic accuracy compensation for the input described dynamic accuracy offset being input to the power governor of CCS control unit; Quick compensating module, dynamically compensates fast for being carried out by the output being input to described power governor after described dynamic accuracy offset amplitude limit.
Further, be 2%Z by the amplitude of described dynamic accuracy offset amplitude limit.
Further, the amplitude limit of described instruction variable quantity is 2%Pe.
Further, when described instruction variable quantity amplitude limit is 2%Pe, maximum amplitude limit △=1 is reached.
The Advantageous Effects of the embodiment of the present invention is, by load command dynamic compensation method of the present invention and system, when making AGC action, the LDC2 load instruction received to respond unit by AGC typical control circuit action steam turbine regulating valve on the one hand, judges load variations direction by AGC control loop prediction of the present invention on the other hand; Compensated by dynamic accuracy, can compensative dispatching instruction LDC1 due to cause delayed of signals transmission and decay, improve the real precision sending out power dynamic response AGC instruction; The real speed sending out power response AGC instruction of unit can be improved by dynamically compensating fast, thus improve the overall AGC performance of unit, meet the technical requirement of electrical network and power monitoring department, strengthen economic benefit and social benefit that thermal power generation unit participates in AGC examination.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.In the accompanying drawings:
Fig. 1 is the thermal power generation unit AGC typical control circuit schematic diagram of prior art;
Fig. 2 is certain the 1000MW unit AGC step/slope load instruction change curve under the thermal power generation unit AGC typical control circuit of prior art;
Fig. 3 is embodiment of the present invention load command dynamic compensation method flow chart;
Fig. 4 is embodiment of the present invention compensation correction control loop schematic diagram;
Fig. 5 is embodiment of the present invention function f
1the amplitude limit schematic diagram of (x);
Fig. 6 is embodiment of the present invention function f
3the amplitude limit schematic diagram of (x);
Fig. 7 is embodiment of the present invention function f
2the amplitude limit schematic diagram of (x);
Fig. 8 is embodiment of the present invention load instruction dynamic compensating system structured flowchart;
Fig. 9 is the structured flowchart of embodiment of the present invention dynamic compensation unit.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the embodiment of the present invention is described in further details.At this, schematic description and description of the present invention is for explaining the present invention, but not as a limitation of the invention.
For improving thermal power generation unit AGC ability, the invention provides a kind of load command dynamic compensation method and system, devise a kind of new control loop, to improve control precision and the response time of unit AGC, new AGC control loop is when response scheduling instruction action, energy is fast prediction load variations trend in time, and shortening unit is real sends out the power response dispatch command time, and raising unit participates in AGC action accuracy and AGC control quick performance index greatly.
As shown in Figure 3, the present embodiment provides a kind of load command dynamic compensation method, and the method comprises:
Step S301: receive the target load instruction LDC2 that exports after communication network and RTU (remote terminal unit) RTU of load instruction LDC1, and described LDC2 is differentiated generate instruction variable quantity.
There is to solve in prior art the problem that load instruction is delayed and decay, the application devises new control loop on the basis of Fig. 1, is the improvement on Fig. 1 basis in Fig. 4 in dotted line frame.As shown in Figure 4, the load scheduling instruction LDC1 that traffic department sends through network communication and transmission to remote control equipment (Remote Terminal Unit RTU), RTU exports target load instruction LDC2, differentiates obtain the instruction variable quantity of load instruction to LDC2.
After this step S301, amplitude limiting processing can be carried out to described instruction variable quantity, generate amplitude limiting processing result.Concrete amplitude limit method is, described instruction variable quantity is input to f
1x () carries out amplitude limiting processing, f
1(X) be the function of LDC2 instruction differential, differentiation result numerical value is larger, and to represent instruction dynamic deviation larger, then design compensation function f
1x () exports the result consistent with trend prediction direction larger.According to " thermal power plant analog control system Acceptance Test code ", (and " automatic generation control (AGC) operational management specifies " requires that unit load dynamic deviation index does not exceed the regulation of 2%Pe, penalty function f
1x () output area should be no more than ± 2%Pe in theory, so can be 2%Pe by instruction variable quantity amplitude limit.Function f
1x the content design principle of () as shown in Figure 5.
Above-mentioned the step of amplitude limiting processing is carried out to described instruction variable quantity also can after step S302 or step S303, the present invention is not as limit.
By the instruction variable quantity generated of differentiating to LDC2, trend prediction can be carried out to load instruction.
Step S302: described in real-time judge, whether the absolute value ABS of instruction variable quantity changes, if so, carries out step S303.
Functional module ABS instruction variable quantity being input to Fig. 4 obtains the absolute value of instruction variable quantity, the absolute value of instruction variable quantity is input to diverter switch T by ABS in real time, whether the absolute value of diverter switch T decision instruction variable quantity changes, and if so, carries out step S303.
Step S303: the difference receiving actual load instruction LDC3 and the described LDC2 generated after described LDC2 carries out rate limit, to described difference amplitude limiting processing, generates amplitude limit value △.
Before step S303, need calculating actual load instruction LDC3 and target in real time to meet the difference of instruction LDC2, when the absolute value of diverter switch T decision instruction variable quantity changes, the difference of LDC3 and LDC2 is input to rectification function f
3x () is carried out amplitude limiting processing and is generated amplitude limit amplitude △.F
3x () is for unit load instruction variable quantity is to f
1the rectification function of (x), f
3x () design function content principle as shown in Figure 6, during to described difference amplitude limiting processing, when described instruction variable quantity amplitude limit is 2%Pe, reaches maximum amplitude limit △=1.
Step S304: the amplitude limiting processing result obtaining described instruction variable quantity, and described amplitude limiting processing result and △ are carried out multiplication operation, generate dynamic accuracy offset.
In order to avoid unit by a small margin step instruction load disturbance cause f
1x problem that () offset data is excessive, devises f
3x () is to f
1x () carries out multiplication rectification, Output rusults is as final accuracy compensation data (dynamic accuracy offset).
Step S305: the input that described dynamic accuracy offset is input to the power governor of CCS control unit is carried out dynamic accuracy compensation, and the output being input to described power governor after described dynamic accuracy offset amplitude limit is carried out dynamically compensate fast.
As shown in Figure 4, the input of the power governor PID of dynamic accuracy offset input existing " stove is with machine " pattern CCS control unit carries out summation operation, completes dynamic accuracy and compensates.
In order to carry out dynamically compensating fast, need dynamic accuracy offset to be input to function F 2 (X) and carry out amplitude limiting processing, then obtain the comprehensive valve bit instruction aperture Z of unit at specified main steam pressure and at full capacity under operating mode is 2%Z by described dynamic accuracy offset amplitude limit, the output being finally input to described power governor carries out summation operation, completes and dynamically compensates fast.
F
2x () is the quick penalty function of AGC load instruction dynamic response, can make up signal owing to transmitting the delay caused, accelerate the real response speed sending out power.In practical application, when determining unit valve flow curve linear, obtain unit at specified main steam pressure and at full capacity under operating mode comprehensive valve bit instruction aperture be Z (%), then design f
2x () exports amplitude peak and is no more than 2% × Z (%).Function content design principle as shown in Figure 7.
Steam Turhine Adjustment instruction after dynamic accuracy compensates and dynamically fast compensates finally is input to turbo generator set, is compensated and dynamically compensate fast by above-mentioned dynamic accuracy, can load responding precision and rapidity, provides the overall performance of GGC.
The present invention, when concrete operations, needs according to shown in Fig. 3, completes the design of unit DCS or other parametric controller schemes, configuration and lower dress.After unit normally runs, carry out AGC step and slope instruction test in 50%-100% rated load interval respectively, by various different Changing load-acceleration upset test, obtain the relation curve F of load changing rate and unit load instruction accuracy compensation
1(X), change small test greatly according to load step amount and determine F
3(X), function F is compensated fast according to the data pacing obtained
2(X).
Do not superpose when it should be noted that action equidirectional with unit primary frequency modulation by sequence control system restriction accuracy compensation function and work, high choosing exports.Time different from unit primary frequency modulation direction of action by sequence control system design AGC direction of action, select the action that priority is high.
The Advantageous Effects of the embodiment of the present invention is, by load command dynamic compensation method of the present invention and system, when making AGC action, the LDC2 load instruction received to respond unit by the typical control circuit of AGC shown in Fig. 1 action steam turbine regulating valve on the one hand, judges load variations direction by AGC control loop prediction of the present invention on the other hand; Compensated by dynamic accuracy, can compensative dispatching instruction LDC1 due to cause delayed of signals transmission and decay, improve the real precision sending out power dynamic response AGC instruction; The real speed sending out power response AGC instruction of unit can be improved by dynamically compensating fast, thus improve the overall AGC performance of unit, meet the technical requirement of electrical network and power monitoring department, strengthen economic benefit and social benefit that thermal power generation unit participates in AGC examination.
As shown in Figure 8, the present embodiment provides a kind of load instruction dynamic compensating system, this load instruction dynamic compensating system: instruction variable quantity generation unit 801, difference clipping unit 802, offset generation unit 803 and dynamic compensation unit 804.
The target load instruction LDC2 that instruction variable quantity generation unit 801 exports after communication network and RTU (remote terminal unit) RTU for receiving load instruction LDC1, and described LDC2 is differentiated generate instruction variable quantity.
There is to solve in prior art the problem that load instruction is delayed and decay, the application devises new control loop on the basis of Fig. 1, is the improvement on Fig. 1 basis in Fig. 4 in dotted line frame.As shown in Figure 4, the load scheduling instruction LDC1 that traffic department sends through network communication and transmission to remote control equipment (Remote Terminal Unit RTU), RTU exports target load instruction LDC2, differentiates obtain the instruction variable quantity of load instruction to LDC2.
After generation instruction variable quantity, amplitude limiting processing can be carried out to described instruction variable quantity, generate amplitude limiting processing result.Concrete amplitude limit method is, described instruction variable quantity is input to f
1x () carries out amplitude limiting processing, f
1(X) be the function of LDC2 instruction differential, differentiation result numerical value is larger, and to represent instruction dynamic deviation larger, then design compensation function f
1x () exports the result consistent with trend prediction direction larger.According to " thermal power plant analog control system Acceptance Test code ", (and " automatic generation control (AGC) operational management specifies " requires that unit load dynamic deviation index does not exceed the regulation of 2%Pe, penalty function f
1x () output area should be no more than ± 2%Pe in theory, so can be 2%Pe by instruction variable quantity amplitude limit.
By the instruction variable quantity generated of differentiating to LDC2, trend prediction can be carried out to load instruction.
Difference clipping unit 802, for receiving the difference of actual load instruction LDC3 and the described LDC2 generated after described LDC2 carries out rate limit, to described difference amplitude limiting processing, generates amplitude limit value △.
Functional module ABS instruction variable quantity being input to Fig. 4 obtains the absolute value of instruction variable quantity, the absolute value of instruction variable quantity is input to diverter switch T by ABS in real time, whether the absolute value of diverter switch T decision instruction variable quantity changes, if changed, receive the difference of actual load instruction LDC3 and the described LDC2 generated after described LDC2 carries out rate limit, to described difference amplitude limiting processing, generate amplitude limit value △.
Before difference clipping unit 802 carries out amplitude limiting processing, calculating actual load instruction LDC3 and target is in real time needed to meet the difference of instruction LDC2, when the absolute value of diverter switch T decision instruction variable quantity changes, the difference of LDC3 and LDC2 is input to rectification function f
3x () is carried out amplitude limiting processing and is generated amplitude limit amplitude △.F
3x () is for unit load instruction variable quantity is to f
1x the rectification function of (), during to described difference amplitude limiting processing, when described instruction variable quantity amplitude limit is 2%Pe, reaches maximum amplitude limit △=1.
Described amplitude limiting processing result and △ for obtaining the amplitude limiting processing result of described instruction variable quantity, and are carried out multiplication operation by offset generation unit 803, generate dynamic accuracy offset.
In order to avoid unit by a small margin step instruction load disturbance cause f
1x problem that () offset data is excessive, devises f
3x () is to f
1x () carries out multiplication rectification, Output rusults is as final accuracy compensation data (dynamic accuracy offset).
Dynamic compensation unit 804 carries out dynamic accuracy compensation for the input described dynamic accuracy offset being input to the power governor of CCS control unit, and is carried out by the output being input to described power governor after described dynamic accuracy offset amplitude limit dynamically compensating fast.
As shown in Figure 9, dynamic compensation unit 804 comprises: accuracy compensation module 901 and fast compensating module 902.
Accuracy compensation module 901 carries out dynamic accuracy compensation for the input described dynamic accuracy offset being input to the power governor of CCS control unit; Quick compensating module 902 dynamically compensates fast for being carried out by the output being input to described power governor after described dynamic accuracy offset amplitude limit.
As shown in Figure 4, the input of the power governor PID of existing for the input of dynamic accuracy offset " stove is with machine " pattern CCS control unit is carried out summation operation by accuracy compensation module 901, completes dynamic accuracy and compensates.
In order to carry out dynamically compensating fast, quick compensating module 902 needs that dynamic accuracy offset is input to function f 2 (x) and carries out amplitude limiting processing, then obtain the comprehensive valve bit instruction aperture Z of unit at specified main steam pressure and at full capacity under operating mode is 2%Z by described dynamic accuracy offset amplitude limit, the output being finally input to described power governor carries out summation operation, completes and dynamically compensates fast.
F
2x () is the quick penalty function of AGC load instruction dynamic response, can make up signal owing to transmitting the delay caused, accelerate the real response speed sending out power.In practical application, when determining unit valve flow curve linear, obtain unit at specified main steam pressure and at full capacity under operating mode comprehensive valve bit instruction aperture be Z (%), then design f
2x () exports amplitude peak and is no more than 2% × Z (%).
Steam Turhine Adjustment instruction after dynamic accuracy compensates and dynamically fast compensates finally is input to turbo generator set, is compensated and dynamically compensate fast by above-mentioned dynamic accuracy, can load responding precision and rapidity, provides the overall performance of GGC.
The Advantageous Effects of the embodiment of the present invention is, by load command dynamic compensation method of the present invention and system, when making AGC action, the LDC2 load instruction received to respond unit by the typical control circuit of AGC shown in Fig. 1 action steam turbine regulating valve on the one hand, judges load variations direction by AGC control loop prediction of the present invention on the other hand; Compensated by dynamic accuracy, can compensative dispatching instruction LDC1 due to cause delayed of signals transmission and decay, improve the real precision sending out power dynamic response AGC instruction; The real speed sending out power response AGC instruction of unit can be improved by dynamically compensating fast, thus improve the overall AGC performance of unit, meet the technical requirement of electrical network and power monitoring department, strengthen economic benefit and social benefit that thermal power generation unit participates in AGC examination.
Claims (9)
1. a load command dynamic compensation method, is characterized in that, described method comprises:
Receive the target load instruction LDC2 that exports after communication network and RTU (remote terminal unit) RTU of load instruction LDC1, and described LDC2 is differentiated generate instruction variable quantity;
If the absolute value ABS of described instruction variable quantity changes, receive the difference of actual load instruction LDC3 and the described LDC2 generated after described LDC2 carries out rate limit, to described difference amplitude limiting processing, generate amplitude limit value △;
Obtain the amplitude limiting processing result of described instruction variable quantity, and described amplitude limiting processing result and △ are carried out multiplication operation, generate dynamic accuracy offset;
The input that described dynamic accuracy offset is input to the power governor of CCS control unit is carried out dynamic accuracy compensation, and the output being input to described power governor after described dynamic accuracy offset amplitude limit is carried out dynamically compensate fast.
2. method according to claim 1, is characterized in that, by described dynamic accuracy offset amplitude limit, comprising:
Obtain the comprehensive valve bit instruction aperture Z of unit at specified main steam pressure and at full capacity under operating mode;
Be 2%Z by described dynamic accuracy offset amplitude limit.
3. method according to claim 1, is characterized in that, the amplitude limiting processing result of described instruction variable quantity is 2%Pe, Pe is rated power.
4. method according to claim 3, is characterized in that, to described difference amplitude limiting processing, generates amplitude limit value △, comprising: to described difference amplitude limiting processing, make, when described instruction variable quantity amplitude limit is 2%Pe, to reach maximum amplitude limit △=1.
5. a load instruction dynamic compensating system, is characterized in that, described system:
Instruction variable quantity generation unit, for receiving the target load instruction LDC2 that load instruction LDC1 exports after communication network and RTU (remote terminal unit) RTU, and differentiates to described LDC2 and generates instruction variable quantity;
Difference clipping unit, for receiving the difference of actual load instruction LDC3 and the described LDC2 generated after described LDC2 carries out rate limit, to described difference amplitude limiting processing, generates amplitude limit value △;
Offset generation unit, for obtaining the amplitude limiting processing result of described instruction variable quantity, and carries out multiplication operation by described amplitude limiting processing result and △, generates dynamic accuracy offset;
Dynamic compensation unit, input for described dynamic accuracy offset being input to the power governor of CCS control unit carries out dynamic accuracy compensation, and is carried out by the output being input to described power governor after described dynamic accuracy offset amplitude limit dynamically compensating fast.
6. system according to claim 5, is characterized in that, described dynamic compensation unit comprises:
Accuracy compensation module, carries out dynamic accuracy compensation for the input described dynamic accuracy offset being input to the power governor of CCS control unit;
Quick compensating module, dynamically compensates fast for being carried out by the output being input to described power governor after described dynamic accuracy offset amplitude limit.
7. system according to claim 5, is characterized in that, is 2%Z by the amplitude of described dynamic accuracy offset amplitude limit.
8. system according to claim 5, is characterized in that, the amplitude limit of described instruction variable quantity is 2%Pe, Pe is rated power.
9. system according to claim 8, is characterized in that, when described instruction variable quantity amplitude limit is 2%Pe, reaches maximum amplitude limit △=1.
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| CN105022299B (en) * | 2015-07-21 | 2017-11-17 | 国网天津市电力公司 | A kind of method of raising AGC load responding rapidities |
| CN108227501B (en) * | 2018-01-16 | 2020-09-22 | 云南电网有限责任公司电力科学研究院 | Compensation method for load control static deviation of thermal power generating unit |
| CN111520700B (en) * | 2020-04-03 | 2021-11-23 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Differential calculation method based on real-time correction of boiler main steam pressure regulation deviation |
| CN111614128B (en) * | 2020-05-20 | 2021-09-28 | 国网河北省电力有限公司电力科学研究院 | AGC coordinated control optimization method for heat supply unit under new energy grid-connected background |
| CN111619366B (en) * | 2020-05-28 | 2021-03-09 | 清华大学 | Control system and control method based on motor rotation and wheel speed sensor |
| CN112186778B (en) * | 2020-09-12 | 2022-06-28 | 江苏方天电力技术有限公司 | Primary frequency modulation optimization control method and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62207199A (en) * | 1986-03-07 | 1987-09-11 | Hitachi Ltd | Load adjusting device for power plant |
| CN101609312A (en) * | 2009-07-28 | 2009-12-23 | 山西省电力公司电力科学研究院 | Adopt the generating set optimization control method of specific steam consumption correction sliding pressure operation curve |
| CN101614998A (en) * | 2008-06-27 | 2009-12-30 | 浙江省电力试验研究院 | Coordinated control method of boiler-turbine direct instruction balance for thermoelectric generator |
-
2012
- 2012-04-20 CN CN201210118490.6A patent/CN103378784B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62207199A (en) * | 1986-03-07 | 1987-09-11 | Hitachi Ltd | Load adjusting device for power plant |
| CN101614998A (en) * | 2008-06-27 | 2009-12-30 | 浙江省电力试验研究院 | Coordinated control method of boiler-turbine direct instruction balance for thermoelectric generator |
| CN101609312A (en) * | 2009-07-28 | 2009-12-23 | 山西省电力公司电力科学研究院 | Adopt the generating set optimization control method of specific steam consumption correction sliding pressure operation curve |
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| CN103378784A (en) | 2013-10-30 |
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