CN107302229B - AGC control device and comprehensive power generation system - Google Patents
AGC control device and comprehensive power generation system Download PDFInfo
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Abstract
The embodiment of the invention provides an AGC control device, which comprises an AGC instruction forming loop and a plant-level load instruction distribution loop, wherein new energy is accessed; the AGC instruction accessed by the new energy forms a loop, and is used for compensating the AGC instruction of the gas turbine power plant sent by the dispatching center according to the deviation value of the regional power generated by the new energy power generation; and the plant-level load instruction distribution loop is used for forming an AGC instruction distribution loop compensated according to the actual power generation power of the gas turbine and the AGC instruction accessed by the new energy and adjusting the load instruction of the gas turbine. The invention can compensate the deviation value of the power generation power of the regional power grid caused by the intermittent power generation of the renewable new energy through the gas turbine generator set, so that the whole power generation system can output stable power generation, eliminate the adverse effect of the intermittent power generation of the renewable new energy on the power grid, stabilize the fluctuation of the intermittent power generation power of the new energy in the regional power grid and realize the complementation of the power generation power of the gas turbine power plant and the new energy power plant.
Description
Technical Field
The invention relates to the field of control devices, in particular to an AGC control device and a comprehensive power generation system.
Background
At present, most of power generation energy is from petrochemical fuel, the combustion of the petrochemical fuel brings serious pollution to the environment on which human beings live, and renewable energy sources such as wind energy, solar energy and the like are pollution-free and have huge reserves, so that the utilization of the renewable energy sources for power generation is generally regarded by all countries in the world. In recent years, renewable new energy power generation technologies represented by wind energy, solar energy and biomass energy are rapidly developed, but the new energy power generation has the characteristics of randomness, uncontrollable property and the like, the power generation of the new energy power generation is intermittent, and disturbance is generated on the generated power accessed to a power grid, and the generated power of a regional power grid fluctuates if the generated power is not timely consumed. How to use a conventional power plant and new energy power generation for complementary power generation to realize consumption of intermittent power generation is a key problem for solving the problem of restricting the development of new energy. The new energy power generation is changed rapidly and randomly, and in order to enable the output of the complementary power generation equipment to stabilize the power fluctuation of the new energy in time, the complementary power generation equipment is required to have rapid peak regulation capability so as to adapt to the instantaneous change of the new energy power generation.
A large number of gas turbine power generation plants are put into production in China, in recent years, the gas turbines are reformed to burn natural gas, low-nitrogen combustion modes are reformed, near zero emission of combustion is achieved, heavy gas turbine generator sets have high quick load response capacity and wide peak regulation ranges (AGC ranges of F-class gas turbines reach 240-390 MW), and therefore the heavy gas turbine generator sets are quite suitable for compensating random fluctuation of output power of wind power plants, the power plants can be used for realizing a complementary power generation system with new energy power generation, the total output power of a wind-combustion complementary combined power generation system is stable after compensation, and adverse effects of large-scale wind power integration on the power system are reduced. Therefore, how to invent a control device for matching a gas turbine power plant with new energy to generate power is a problem to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides an AGC control device, which compensates a regional power grid power generation power deviation value caused by renewable new energy intermittent power generation through a gas turbine generator set, so that the whole power generation system can output stable power generation power, the adverse effect of the renewable new energy intermittent power generation on a power grid is eliminated, the fluctuation of the new energy intermittent power generation power in the regional power grid is stabilized, and the power complementation of a gas turbine power plant and a new energy power plant is realized.
The invention provides an AGC control device, comprising: an AGC instruction accessed by new energy forms a loop and a plant-level load instruction distribution loop;
the AGC instruction accessed by the new energy forms a loop, and is used for compensating the AGC instruction of the gas turbine power plant sent by the dispatching center according to the deviation value of the regional power generated by the new energy power generation;
and the plant-level load instruction distribution loop is used for forming an AGC instruction distribution loop compensated according to the actual power generation power of the gas turbine and the AGC instruction accessed by the new energy and adjusting the load instruction of the gas turbine.
Preferably, the AGC instruction forming loop accessed by the new energy specifically includes a regional power deviation operation module and a plant-level AGC instruction synthesis module;
the regional power deviation operation module is used for calculating a deviation value of the regional power;
and the plant-level AGC instruction comprehensive module is used for superposing the deviation value of the area power to the AGC instruction of the gas turbine power plant sent by the dispatching center.
Preferably, the plant-level load instruction distribution loop specifically comprises a plant-level power generation power integration module, a load instruction distribution PI control module, a unit running state accumulator and a unit power generation power tracking calculation module;
the plant-level power generation power comprehensive module is used for calculating the total plant-level power generation power according to the actual power generation power of the gas turbine;
the unit running state accumulator is used for calculating the number of running units;
the unit generating power tracking calculation module is used for calculating the average generating power of each unit according to the plant-level total generating power and the number of the calculated operating units;
and the load instruction distribution PI control module is used for forming an AGC instruction after loop compensation according to the plant-level total power generation power and the AGC instruction accessed by the new energy and adjusting and distributing the load instruction of the gas turbine according to the average power generation power of each unit.
Preferably, the AGC instruction forming loop for new energy access further includes: the system comprises a unit load instruction low limit alarm module, a load instruction change rate lower limit switching module, a load instruction change rate setting module, a unit load instruction high limit alarm module, a load instruction change rate upper limit switching module, a load instruction change rate limiting module and a 0 instruction module;
the unit load instruction lower limit alarm module is connected with the control end of the load instruction change rate lower limit instruction switching module and is used for respectively outputting a 1 instruction and a 0 instruction to control the load instruction change rate lower limit instruction switching module according to whether the load instruction of the gas turbine is lower than a preset unit target load lower limit;
the unit load instruction upper limit alarm module is connected with the control end of the load instruction change rate upper limit instruction switching module and is used for respectively outputting a 1 instruction and a 0 instruction to control the load instruction change rate upper limit instruction switching module according to whether the load instruction of the gas turbine is higher than a preset unit target load upper limit;
the input end of the load instruction change rate lower limit instruction switching module is respectively connected with the load instruction change rate setting module and the 0 instruction module, and is used for outputting a load instruction change rate instruction preset by the load instruction change rate setting module according to a 0 instruction output by the unit load instruction lower limit alarm module or outputting an instruction output by the 0 instruction module according to a 1 instruction output by the unit load instruction lower limit alarm module;
the input end of the load instruction change rate upper limit instruction switching module is respectively connected with the load instruction change rate setting module and the 0 instruction module, and is used for outputting a load instruction change rate instruction preset by the load instruction change rate setting module according to a 0 instruction output by the unit load instruction high limit alarm module or outputting an instruction output by the 0 instruction module according to a 1 instruction output by the unit load instruction high limit alarm module;
the input end of the limiting value of the descending change rate of the load instruction change rate limiting module is connected with the switching module of the lower limit instruction of the load instruction change rate, and the input end of the limiting value of the ascending change rate of the load instruction change rate limiting module is connected with the switching module of the upper limit instruction of the load change rate and is used for limiting the upper limit and the lower limit of the deviation value of the regional power.
Preferably, the AGC instruction forming loop for new energy access further includes: an inertial filtering operation module;
and the inertial filtering operation module is used for carrying out filtering processing on the deviation value of the regional power.
Preferably, the AGC instruction forming loop for new energy access further includes: the system comprises a new energy power generation compensation switching switch, a new energy power generation compensation switching module and a 0 instruction module;
the new energy power generation compensation switching/cutting switch is connected with a control end of the new energy power generation compensation switching module and is used for outputting a switching signal or a cutting signal to control the new energy power generation compensation switching module;
and the new energy power generation compensation input switching module is used for outputting the deviation value of the regional power according to the input signal or outputting the instruction of the 0 instruction module according to the cutting signal.
Preferably, the plant-level load instruction distribution loop further comprises: a manual/automatic switching module for unit load instruction distribution and a manual/automatic switching module for unit AGC;
the unit load instruction distribution manual/automatic switching module is used for switching plant-level load instruction distribution manual/automatic control signals;
and the unit AGC manual/automatic switching module is used for switching manual/automatic control signals of the gas turbine.
Preferably, the plant-level load instruction distribution loop further comprises: the load instruction offset adjusting module and the load instruction adding module are connected with the load instruction offset adjusting module;
the load instruction offset adjusting module is used for outputting a preset load instruction offset instruction to adjust the load instruction of the gas turbine;
and the load instruction adding module is used for superposing the preset load instruction offset instruction on the load instruction of the gas turbine.
Preferably, the method further comprises the following steps: an analog input channel;
the analog input channel is used for transmitting instructions sent by the dispatching center.
The invention provides an integrated power generation system, which is characterized by comprising: a monitoring device of a regional power grid accessed with new energy, an automatic control device of a dispatching center, and an AGC control device of a gas turbine power plant of any one of claims 1 to 9;
the monitoring device of the regional power grid connected with the new energy transmits a target value of regional power and an actual value of the regional power to the AGC control device of the gas turbine power plant;
the dispatching center automatic control device transmits the AGC command of the gas turbine power plant to the gas turbine power plant AGC control device;
the gas turbine power plant AGC control device receives the AGC command of the gas turbine power plant transmitted by the dispatching center automatic control device, receives a target value of the regional power and an actual value of the regional power transmitted by a monitoring device of a regional power grid accessed with new energy, calculates a deviation value of the regional power according to the target value and the actual value of the regional power, and adjusts and distributes the load command of the gas turbine according to the deviation value of the regional power, the actual power generation power of the gas turbine and the AGC command of the gas turbine power plant.
According to the technical scheme, the embodiment of the invention has the following advantages:
the embodiment of the invention provides an AGC control device, which comprises an AGC instruction forming loop and a plant-level load instruction distribution loop, wherein new energy is accessed; the AGC instruction accessed by the new energy forms a loop, and is used for compensating the AGC instruction of the gas turbine power plant sent by the dispatching center according to the deviation value of the regional power generated by the new energy power generation; and the plant-level load instruction distribution loop is used for forming an AGC instruction distribution loop compensated according to the actual power generation power of the gas turbine and the AGC instruction accessed by the new energy and adjusting the load instruction of the gas turbine. The invention can compensate the deviation value of the power generation power of the regional power grid caused by the intermittent power generation of the renewable new energy through the gas turbine generator set, so that the whole power generation system can output stable power generation power, eliminate the adverse effect of the intermittent power generation of the renewable new energy on the power grid, stabilize the fluctuation of the intermittent power generation power of the new energy in the regional power grid and realize the power complementation of a gas turbine power plant and a new energy power plant.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic diagram of an AGC control apparatus provided in an embodiment of the present invention.
Fig. 2 is a schematic diagram of an integrated power generation system provided in an embodiment of the present invention.
Wherein the reference numbers are as follows:
1. an AGC instruction accessed by new energy forms a loop; 2. a plant-level load instruction distribution loop; 3. newly added modules and signals; 11. a regional power deviation operation module; 12. a load command change rate limiting module; 13. a new energy power generation compensation switch; 14. the new energy power generation compensation input switching module; 15. a 0 instruction module; 16. an inertial filtering operation module; 17. a plant-level AGC instruction synthesis module; 22. a unit load instruction low limit alarm module; 23. a load instruction change rate lower limit switching module; 24. a load instruction change rate setting module; 25. a unit load instruction high limit alarm module; 26. a load instruction change rate upper limit switching module; 10. a plant-level power generation power comprehensive module; 18. a load instruction distribution PI control module; 19. a unit running state accumulator; 20. a unit generating power tracking calculation module; 21. a manual/automatic switching module for unit load instruction distribution; 28. a load instruction offset adjusting module of the #1 unit; 31. a #1 unit load instruction addition module; 29. a #2 unit load instruction offset adjusting module; 32. #2 Unit load instruction addition Module; 30. #3 Unit load instruction offset adjustment module; 33. #3 Unit load instruction addition Module; 111. an AGC manual/automatic switching module of a #1 unit; 112. #1 Unit tracking Module; 121. #2 set AGC manual/automatic switching module; 122. #2 Unit tracking Module; 131. an AGC manual/automatic switching module of a #3 set; 132. #3 Unit tracking Module; 401. an analog input channel; 402. actual measurement power of a #1 unit; 403. #2 Unit actual measurement Power; 404. #3 actual measurement power of the unit; 405. AGC commands for a gas turbine power plant; 406. a target value for regional power exchange; 407. actual value of area power exchange; 201. the monitoring device is connected with a regional power grid of new energy; 202. the dispatching center automation control device; 203. gas turbine power plant AGC control.
Detailed Description
The embodiment of the invention provides an AGC control device, which compensates a regional power grid power generation power deviation value caused by renewable new energy intermittent power generation through a gas turbine generator set, so that the whole power generation system can output stable power generation power, the adverse effect of the renewable new energy intermittent power generation on a power grid is eliminated, the fluctuation of the new energy intermittent power generation power in the regional power grid is stabilized, and the power complementation of a gas turbine power plant and a new energy power plant is realized.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of an AGC control apparatus according to the present invention, taking three gas turbines as an example, includes:
an AGC instruction accessed by new energy forms a loop 1 and a plant-level load instruction distribution loop 2;
an AGC instruction accessed by new energy forms a loop 1, and is used for compensating an AGC instruction 405 of a gas turbine power plant sent by a dispatching center according to a deviation value of regional power generated by new energy power generation;
and the plant-level load instruction distribution loop 2 is used for forming an AGC instruction distribution and adjusting the load instruction of the gas turbine after loop compensation according to the measured power 402 of the #1 unit, the measured power 403 of the #2 unit, the measured power 404 of the #3 unit and the AGC instruction accessed by the new energy.
AGC is Auto Generation Control, and is abbreviated as automatic power Generation Control. The plant-level load optimized distribution control is that on the premise of meeting the automatic power generation control requirement of a power grid, the power plant requires scheduling without directly scheduling units, the whole plant is regarded as a single power generation executing mechanism, only the active power instruction of the whole plant is issued, on the premise of ensuring that the actual load lifting speed of the whole plant meets the scheduling requirement of the power grid, each unit in the plant economically and rapidly responds to the change of the load instruction of a power system according to the respective actual running condition, finally, the closed-loop control of the power of the whole plant is completed, and the AGC control of the whole plant is realized.
Referring to fig. 1, an embodiment of another AGC control apparatus according to the present invention, taking three gas turbines as an example, includes: an AGC instruction accessed by new energy forms a loop 1 and a plant-level load instruction distribution loop 2;
an AGC instruction accessed by new energy forms a loop 1, and is used for compensating an AGC instruction 405 of a gas turbine power plant sent by a dispatching center according to a deviation value of regional power generated by new energy power generation;
and the plant-level load instruction distribution loop 2 is used for forming an AGC instruction distribution and adjusting the load instruction of the gas turbine after loop compensation according to the measured power 402 of the #1 unit, the measured power 403 of the #2 unit, the measured power 404 of the #3 unit and the AGC instruction accessed by the new energy.
Further, the AGC instruction forming circuit 1 for new energy access specifically includes a regional power deviation operation module 11 and a plant-level AGC instruction synthesis module 17;
the regional power deviation operation module 11 is used for calculating a deviation value of regional power;
and the plant-level AGC command synthesis module 17 is used for superposing the deviation value of the area power to the AGC command 405 of the gas turbine power plant sent by the dispatching center.
It should be noted that the area power deviation operation module 11 is a subtraction module; the plant-level AGC instruction comprehensive module 17 is an addition module;
a target value 406 of the regional power exchange (the target value of the regional power exchange: the planned value of the exchange power between the local region and the power grid issued by the dispatching center) is sent to the 1 st input end of the regional power deviation operation module 11, and an actual value 407 of the regional power exchange is sent to the 2 nd input end of the regional power deviation operation module 11 for calculating the deviation value of the regional power;
the output of the plant-level AGC instruction integration module 17 superimposes the regional power deviation value of the local power grid due to the new energy power generation access on the AGC instruction 405 of the original gas turbine power plant, so that complementary consumption of new energy power generation can be realized by using the gas turbine generator set which quickly responds in the local power grid to which the new energy power generation access is accessed.
Further, the plant-level load instruction distribution loop 2 specifically comprises a plant-level generated power comprehensive module 10, a load instruction distribution PI control module 18, a unit running state accumulator 19 and a unit generated power tracking calculation module 20;
the plant-level power generation power comprehensive module 10 is used for calculating the total plant-level power generation power;
a unit operating state totalizer 19 for calculating the number of operating units;
the unit generated power tracking calculation module 20 is used for calculating the average generated power of each unit according to the plant-level total generated power and the number of the calculated operating units;
and the load instruction distribution PI control module 18 is used for forming an AGC instruction after loop compensation according to the plant-level total power generation power and the AGC instruction accessed by the new energy and adjusting and distributing the load instruction of the gas turbine according to the average power generation power of each unit.
It should be noted that the plant-level generated power integration module 10 is an addition module; the load instruction distribution PI control module 18 is a PID control + tracking module, the tracking module is used for realizing undisturbed switching of load distribution of the switching unit when manual/automatic switching of unit load distribution is carried out, and when the plant-level load distribution is automatic, the output of the load instruction distribution PI control module 18 is the average generated energy of the running unit; the unit running state accumulator 19 is a switching value accumulation module; the unit generating power tracking calculation module 20 is a division module;
the #1 set actual measured power 402, the #2 set actual measured power 403 and the #3 set actual measured power 404 are respectively transmitted to a first input end, a second input end and a third input end of the plant-level generated power comprehensive module 10 and used for calculating plant-level total generated power;
the specific calculation formula of the average generated power of each unit is as follows:
further, the AGC instruction forming loop 1 for new energy access further includes: the system comprises a unit load instruction low limit alarm module 22, a load instruction change rate lower limit switching module 23, a load instruction change rate setting module 24, a unit load instruction high limit alarm module 25, a load instruction change rate upper limit switching module 26, a load instruction change rate limiting module 12 and a 0 instruction module 15;
the unit load instruction lower limit alarm module 22 is connected with a control end of the load instruction change rate lower limit switching module 23 and is used for respectively outputting a 1 instruction and a 0 instruction to control the load instruction change rate lower limit switching module 23 according to whether the load instruction of the gas turbine is lower than a preset unit target load lower limit;
the unit load instruction high limit alarm module 25 is connected with the control end of the load instruction change rate upper limit switching module 26, and is used for respectively outputting a 1 instruction and a 0 instruction to control the load instruction change rate upper limit switching module 26 according to whether the load instruction of the gas turbine is higher than the preset unit target load upper limit;
the input end of the load instruction change rate lower limit switching module 23 is respectively connected with the load instruction change rate setting module 24 and the 0 instruction module 15, and is used for outputting a load instruction change rate instruction preset by the load instruction change rate setting module 24 according to the 0 instruction output by the unit load instruction lower limit alarm module 22 or outputting an instruction output by the 0 instruction module 15 according to the 1 instruction output by the unit load instruction lower limit alarm module 22;
the input end of the load instruction change rate upper limit switching module 26 is respectively connected with the load instruction change rate setting module 24 and the 0 instruction module 15, and is used for outputting a load instruction change rate instruction preset by the load instruction change rate setting module 24 according to the 0 instruction output by the unit load instruction upper limit alarm module 25 or outputting an instruction output by the 0 instruction module 15 according to the 1 instruction output by the unit load instruction upper limit alarm module 25;
a descending change rate limit input end (VL input end) of the load instruction change rate limiting module 12 is connected to the load instruction change rate lower limit switching module 23, and an ascending change rate limit input end (VR input end) of the load instruction change rate limiting module 12 is connected to the load instruction change rate upper limit switching module 26, and is used for limiting the upper limit and the lower limit of the deviation value of the area power.
It should be noted that the load instruction change rate lower limit switching module 23 and the load instruction change rate upper limit switching module 26 are switching modules between two inputs, and output one of the two inputs according to a signal of the control end; the load instruction change rate setting module 24 is a bias module, and an output instruction is a preset ground value; the load instruction change rate limiting module 12 is a change rate limiting module, an input signal at the input end of a descending change rate limiting value is a lower limit of a change rate, and an input signal at the input end of an ascending change rate limiting value is an upper limit of the change rate;
when the load instruction of the gas turbine output by the unit load instruction distribution manual/automatic switching module 21 is not lower than the preset unit target load lower limit, the unit load instruction lower limit alarm module 22 outputs a 0 instruction to the control end of the load instruction change rate lower limit switching module 23, so that the output signal of the load instruction change rate lower limit switching module 23 is the load instruction change rate instruction output by the load instruction change rate setting module 24;
when the load instruction of the gas turbine output by the unit load instruction distribution manual/automatic switching module 21 is lower than the preset unit target load lower limit, the unit load instruction lower limit alarm module 22 outputs a 1 instruction to the control end of the load instruction change rate lower limit switching module 23, so that the output signal of the load instruction change rate lower limit switching module is a 0 instruction output by the 0 instruction module 15.
Here, when the unit power adjustment command output by the unit load command allocation manual/automatic switching module 21 is lower than the preset unit target load lower limit, the upper limit of the change rate of the load command change rate limiting module 12 in the power decreasing direction may be 0, and the change of the power command caused by the regional power deviation in the decreasing direction may be prohibited.
When the load instruction of the gas turbine output by the unit load instruction distribution manual/automatic switching module 21 is not higher than the preset target load upper limit of the unit, the unit load instruction upper limit alarm module 25 outputs a 0 instruction to the control end of the load instruction change rate upper limit switching module 26, so that the output signal of the load instruction change rate upper limit switching module 26 is the load instruction change rate instruction output by the load instruction change rate setting module 24;
when the load instruction of the gas turbine output by the unit load instruction distribution manual/automatic switching module 21 is higher than the preset target load upper limit of the unit, the unit load instruction upper limit alarm module 25 outputs a 1 instruction to the control end of the load instruction upper limit switching module 26, so that the output signal of the load instruction upper limit switching module 26 is the instruction output by the 0 instruction module 15.
Here, when the unit power adjustment command output by the unit load command allocation manual/automatic switching module 21 is higher than the preset unit target upper load limit, the upper limit of the change rate of the load command change rate limiting module 12 in the power increase direction may be set to 0, and the change of the power command caused by the regional power deviation in the increase direction may be prohibited.
The upper limit of the change rate of the load command change rate limiting module 12 in the power increase direction is the output signal of the load command change rate upper limit switching module 26;
the lower limit of the change rate of the power reduction direction of the load command change rate limiting module 12 is the output signal of the load command change rate lower limit switching module 23.
When the change rate of the deviation value of the regional power is not higher than the upper limit of the change rate in the power increasing direction of the load instruction change rate limiting module 12 and is not lower than the lower limit of the change rate in the power decreasing direction of the load instruction change rate limiting module 12, the deviation value of the regional power can be directly output; when the variation rate of the regional power deviation value is higher than the upper limit of the variation rate in the power increasing direction of the load command variation rate limiting module 12 or lower than the lower limit of the variation rate in the power decreasing direction of the load command variation rate limiting module 12, the regional power deviation value can be output only according to the upper limit of the variation rate in the power increasing direction or the lower limit of the variation rate in the power decreasing direction of the load command variation rate limiting module 12.
Further, the AGC instruction forming loop 1 for new energy access further includes: an inertial filtering operation module 16;
and the inertial filtering operation module 16 is configured to perform filtering processing on the deviation value of the area power.
The inertial filtering operation module 16 is a first-order inertial filtering module, and the inertial filtering module 16 can filter high-frequency or low-frequency interference signals generated by new energy power generation, eliminate large-amplitude frequent fluctuation of regional power, and eliminate load instruction fluctuation when the new energy power generation compensation function is switched.
Further, the AGC instruction forming loop 1 for new energy access further includes: a new energy power generation compensation switching switch 13, a new energy power generation compensation switching module 14 and a 0 instruction module 15;
the new energy power generation compensation input/output switch 13 is connected with a control end of the new energy power generation compensation input switching module 14 and is used for outputting an input signal or a cut-off signal to control the new energy power generation compensation input switching module 14;
and the new energy power generation compensation input switching module 14 is used for outputting the deviation value of the regional power according to the input signal or outputting the instruction of the 0 instruction module 15 according to the cutting signal.
It should be noted that the new energy power generation compensation input switching module 14 is a switching module between two inputs, and outputs one of the two inputs according to a signal of the control end; the new energy power generation compensation throw/cut switch 13 determines whether to throw in the new energy power generation compensation function.
Further, the plant-level load instruction distribution loop 2 further includes: a unit load instruction distribution manual/automatic switching module 21, a #1 unit AGC manual/automatic switching module 111, a #2 unit AGC manual/automatic switching module 121, and a #3 unit AGC manual/automatic switching module 131;
the unit load instruction distribution manual/automatic switching module 21 is used for switching plant-level load distribution manual/automatic control signals;
the manual/automatic switching module 111 for AGC of #1 unit, #2 unit AGC manual/automatic switching module 121, and #3 unit AGC manual/automatic switching module 131 are respectively used for switching manual/automatic control signals of #1 unit, #2 unit, and #3 unit.
It should be noted that the outputs of the #1 unit AGC manual/automatic switching module 111, the #2 unit AGC manual/automatic switching module 121, and the #3 unit AGC manual/automatic switching module 131 are the final control quantities of the respective units respectively;
the #1 unit tracking module 112, the #2 unit tracking module 122, and the #3 unit tracking module 132 are the beginning of another load control logic device.
Further, the plant-level load instruction distribution loop 2 further includes: a #1 unit load instruction offset adjusting module 28, a #1 unit load instruction adding module 31, a #2 unit load instruction offset adjusting module 29, a #2 unit load instruction adding module 32, a #3 unit load instruction offset adjusting module 30 and a #3 unit load instruction adding module 33;
the load instruction offset adjustment module 28 of the #1 unit, the load instruction offset adjustment module 29 of the #2 unit and the load instruction offset adjustment module 30 of the #3 unit are used for outputting preset load instruction offset instructions to adjust the load instructions of the #1 unit, the #2 unit and the #3 unit;
the #1 unit load instruction adding module 31, the #2 unit load instruction adding module 32 and the #3 unit load instruction adding module 33 are configured to respectively superimpose the preset load instruction offset instructions on the load instructions of the #1 unit, the #2 unit and the #3 unit.
It should be noted that the #1 unit load instruction offset adjustment module 28, the #2 unit load instruction offset adjustment module 29, and the #3 unit load instruction offset adjustment module 30 are offset modules, and output instructions are preset numerical values; the #1 unit load instruction addition module 31, the #2 unit load instruction addition module 32 and the #3 unit load instruction addition module 33 are addition modules.
Further, still include: an analog input channel 401;
the analog input channel 401 is used for transmitting instructions sent by the scheduling center.
It should be noted that the analog input channel 401 can be used not only to transmit the instructions sent by the scheduling center, but also to transmit some analog signals in the gas turbine plant, such as the actual power of the gas turbine.
Referring to fig. 1 and 2, an embodiment of an integrated power generation system according to the present invention includes: a monitoring device 201 of a regional power grid accessed with new energy, a dispatching center automation control device 202 and a gas turbine power plant AGC control device 203;
the monitoring device 201 connected to the regional power grid of the new energy source transmits a target value 406 and an actual value 407 of the regional power to the AGC control device 203 of the gas turbine power plant;
the dispatch center automation control 202 transmits the gas turbine power plant AGC command 405 to the gas turbine power plant AGC control 203;
the gas turbine power plant AGC control device 203 receives the gas turbine power plant AGC command 405 transmitted from the scheduling center automation control device 202, receives the target value 406 of the district power and the actual value 407 of the district power transmitted from the monitoring device 201 of the district power grid connected to the new energy, calculates an offset value of the district power from the target value 406 of the district power and the actual value 407 of the district power, and adjusts and allocates the load command of the gas turbine based on the offset value of the district power, #1 unit measured power 402, #2 unit measured power 403, #3 unit measured power 404, and the gas turbine power plant AGC command 405.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, and is not described herein again.
In the two embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, the modules may be divided into different ways, and for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted or not executed.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.
The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a DCS (distributed control system), a PLC (programmable controller), a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. An AGC control apparatus, comprising: an AGC instruction accessed by new energy forms a loop and a plant-level load instruction distribution loop;
the AGC instruction accessed by the new energy forms a loop, and is used for compensating the AGC instruction of the gas turbine power plant sent by the dispatching center according to the deviation value of the regional power generated by the new energy power generation;
the plant-level load instruction distribution loop specifically comprises a plant-level power generation power integration module, a load instruction distribution PI control module, a unit running state accumulator and a unit power generation power tracking calculation module;
the plant-level power generation power comprehensive module is used for calculating the total plant-level power generation power according to the actual power generation power of the gas turbine;
the unit running state accumulator is used for calculating the number of running units;
the unit generating power tracking calculation module is used for calculating the average generating power of each unit according to the plant-level total generating power and the number of the calculated operating units;
and the load instruction distribution PI control module is used for forming an AGC instruction after loop compensation according to the plant-level total power generation power and the AGC instruction accessed by the new energy and adjusting and distributing the load instruction of the gas turbine according to the average power generation power of each unit.
2. The AGC control apparatus according to claim 1, wherein the AGC instruction forming loop for new energy access specifically includes a regional power deviation operation module and a plant-level AGC instruction synthesis module;
the regional power deviation operation module is used for calculating a deviation value of the regional power;
and the plant-level AGC instruction comprehensive module is used for superposing the deviation value of the area power to the AGC instruction of the gas turbine power plant sent by the dispatching center.
3. The AGC control apparatus as claimed in claim 2, wherein the AGC command forming loop for new energy access further comprises: the system comprises a unit load instruction low limit alarm module, a load instruction change rate lower limit switching module, a load instruction change rate setting module, a unit load instruction high limit alarm module, a load instruction change rate upper limit switching module, a load instruction change rate limiting module and a 0 instruction module;
the unit load instruction lower limit alarm module is connected with the control end of the load instruction change rate lower limit instruction switching module and is used for respectively outputting a 1 instruction and a 0 instruction to control the load instruction change rate lower limit instruction switching module according to whether the load instruction of the gas turbine is lower than a preset unit target load lower limit;
the unit load instruction high limit alarm module is connected with the control end of the load instruction change rate upper limit switching module and is used for respectively outputting a 1 instruction and a 0 instruction to control the load instruction change rate upper limit switching module according to whether the load instruction of the gas turbine is higher than a preset unit target load upper limit;
the input end of the load instruction change rate lower limit instruction switching module is respectively connected with the load instruction change rate setting module and the 0 instruction module, and is used for outputting a load instruction change rate instruction preset by the load instruction change rate setting module according to a 0 instruction output by the unit load instruction lower limit alarm module or outputting an instruction output by the 0 instruction module according to a 1 instruction output by the unit load instruction lower limit alarm module;
the input end of the load instruction change rate upper limit switching module is respectively connected with the load instruction change rate setting module and the 0 instruction module, and is used for outputting a load instruction change rate instruction preset by the load instruction change rate setting module according to the 0 instruction output by the unit load instruction upper limit alarm module or outputting an instruction output by the 0 instruction module according to the 1 instruction output by the unit load instruction upper limit alarm module;
the input end of the limiting value of the descending change rate of the load instruction change rate limiting module is connected with the switching module of the lower limit instruction of the load instruction change rate, and the input end of the limiting value of the ascending change rate of the load instruction change rate limiting module is connected with the switching module of the upper limit instruction of the load instruction change rate and is used for limiting the upper limit and the lower limit of the deviation value of the regional power.
4. The AGC control apparatus as claimed in claim 2, wherein the AGC command forming loop for new energy access further comprises: an inertial filtering operation module;
and the inertial filtering operation module is used for carrying out filtering processing on the deviation value of the regional power.
5. The AGC control apparatus as claimed in claim 2, wherein the AGC command forming loop for new energy access further comprises: the system comprises a new energy power generation compensation switching switch, a new energy power generation compensation switching module and a 0 instruction module;
the new energy power generation compensation switching/cutting switch is connected with a control end of the new energy power generation compensation switching module and is used for outputting a switching signal or a cutting signal to control the new energy power generation compensation switching module;
and the new energy power generation compensation input switching module is used for outputting the deviation value of the regional power according to the input signal or outputting the instruction of the 0 instruction module according to the cutting signal.
6. The AGC control apparatus of claim 1, wherein the plant level load command distribution loop further comprises: a manual/automatic switching module for unit load instruction distribution and a manual/automatic switching module for unit AGC;
the unit load instruction distribution manual/automatic switching module is used for switching plant-level load instruction distribution manual/automatic control signals;
and the unit AGC manual/automatic switching module is used for switching manual/automatic control signals of the gas turbine.
7. The AGC control apparatus of claim 1, wherein the plant level load command distribution loop further comprises: the load instruction offset adjusting module and the load instruction adding module are connected with the load instruction offset adjusting module;
the load instruction offset adjusting module is used for outputting a preset load instruction offset instruction to adjust the load instruction of the gas turbine;
and the load instruction adding module is used for superposing the preset load instruction offset instruction on the load instruction of the gas turbine.
8. The AGC control apparatus of claim 1, further comprising: an analog input channel;
the analog input channel is used for transmitting instructions sent by the dispatching center.
9. An integrated power generation system, comprising: a monitoring device of a regional power grid accessed with new energy, an automatic control device of a dispatching center, and the AGC control device of any one of claims 1 to 8;
the monitoring device of the regional power grid connected with the new energy transmits a target value of regional power and an actual value of the regional power to the AGC control device of the gas turbine power plant;
the dispatching center automatic control device transmits the AGC command of the gas turbine power plant to the gas turbine power plant AGC control device;
the gas turbine power plant AGC control device receives the AGC command of the gas turbine power plant transmitted by the dispatching center automatic control device, receives a target value of the regional power and an actual value of the regional power transmitted by a monitoring device of a regional power grid accessed with new energy, calculates a deviation value of the regional power according to the target value and the actual value of the regional power, and adjusts and distributes a load command of the gas turbine according to the deviation value of the regional power, the actual power generation power of the gas turbine and the AGC command of the gas turbine power plant.
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