CN111969660B - Primary frequency modulation assessment method and system based on different working condition reward and punishment double-track operation - Google Patents
Primary frequency modulation assessment method and system based on different working condition reward and punishment double-track operation Download PDFInfo
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Abstract
The utility model discloses a primary frequency modulation examination method and system based on different operating condition reward punishment double track operation, include: collecting relevant parameters of primary frequency modulation of the unit in real time, wherein the parameters comprise frequency, active power, main steam pressure and disturbance test signals; and when the unit is judged to be in the primary frequency modulation disturbance test working condition through the acquired parameters, performing reward punishment on the unit through an excess frequency modulation compensation standard, and when the unit is judged to be in the primary frequency modulation disturbance test working condition, performing examination and evaluation on the unit by adopting a standard examination method. The unit primary frequency modulation action and the working condition can be monitored and analyzed, and reward and punishment assessment is performed by adopting different assessment standards according to different primary frequency modulation working conditions of the unit.
Description
Technical Field
The disclosure relates to a primary frequency modulation assessment method and system based on different working condition reward and punishment double-track operation.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
With the rapid development of economy in China, the power demand and the power grid scale are increasing day by day, and in order to improve the operation economy of the power grid, the construction scale of a high-voltage interconnected power grid is continuously enlarged in recent years. When the high-voltage direct current transmission realizes interconnection of regional power grids and improves economic benefits, inevitable risks exist, single-pole and double-pole locking faults of a high-voltage direct current system are difficult to avoid, once single-pole and double-pole locking occurs during large-scale power transmission of ultra-high-voltage direct current, large-scale fluctuation of section power occurs, large impact is formed on a transmitting end power grid and a receiving end power grid, and safe operation of the power grid system is affected. Therefore, primary frequency modulation in the grid source coordination function becomes one of effective means for stabilizing the grid.
At present, a power supply in China still takes a thermal generator set as a main power, and the primary frequency modulation function of the thermal generator set is mainly realized by adjusting an air inlet adjusting door of a DEH system, utilizing boiler heat storage, quickly responding to the requirement of a power grid under the condition that the power grid is abnormal, stabilizing the frequency of the power grid, making up the load gap of the power grid and maintaining the safety of the power grid. In order to ensure safe operation of respective power grids and grid-connected generator sets, improve the quality of electric energy and standardize auxiliary service management, regional power plant grid-connected operation management implementing rules and regional grid-connected power plant auxiliary service management implementing rules are formulated according to relevant rules and regulations such as 'electric power supervision regulations' and 'notice on printed generation plant grid-connected operation management opinions' (No. 2003 & 23), and primary frequency modulation operation examination management methods and primary frequency modulation action performance examination of the generator sets are determined.
In the prior art, a primary frequency modulation performance evaluation calculation parameter of a unit by power grid dispatching management is mainly derived from an energy management system EMS, wherein frequency, active power and other measurement point information corresponding to the unit is defined in a WAMS (wide area monitoring system) telemetering measurement definition table, and telemetering data such as frequency, active power, rotating speed, primary frequency modulation pre-and-post instruction and the like calculated by primary frequency modulation disturbance are obtained from a PMU (phasor measurement Unit) real-time library according to telemetering information defined in the WAMS.
In the national grid (tone/4) 910 plus 2018 primary frequency modulation management regulations of the power system of the national grid company and the primary frequency modulation examination rules of various areas such as north China and east China, the concept of primary frequency modulation action integral electric quantity is proposed, namely, the accumulated integral value of the generating load variation quantity relative to the sampling time is provided within a period of time (recommended value 60s) when the grid frequency variation exceeds the primary frequency modulation dead zone. As shown in fig. 1, the diagram is a schematic diagram of checking and calculating the primary frequency modulation performance of a conventional unit, where a curve 1 is a power grid frequency value, a curve 2 is a theoretical primary frequency modulation action amplitude, a curve 3 is a theoretical primary frequency modulation theoretical actual action amplitude, a theoretical action integral electric quantity a can be obtained from the curve 2, an actual action integral electric quantity B can be obtained from the curve 3, B needs to reach a certain ratio of a to meet the standard requirement of a power grid, and the ratio of the actual action integral electric quantity B to the action integral electric quantity a is an electric quantity contribution index. Because the actual actions are not full and completely consistent with the theoretical actions due to the inherent delay and inertia of the unit, the electric network formulation and assessment standards are considered, for example, if the primary frequency modulation electric quantity contribution index specified in the northwest electric network generator set primary frequency modulation technical management regulation is not less than 60%, the electric network is judged to be qualified, and if the electric network in north china requires the electric quantity contribution index to reach 70%, the electric network is judged to be qualified.
Because the frequency of the power grid with larger frequency deviation is less, the performance of the primary frequency modulation of the conventional unit can only be mastered after an accident occurs, and regulation and control measures cannot be timely and effectively taken in the accident, so that the problems such as large frequency drop in the Jinsu direct current blocking and the like are caused, and the safe and stable operation of the power grid is influenced. Therefore, a primary frequency modulation performance assessment system is gradually established in regional power grids in north China, northeast China, east China and the like, an irregular remote disturbance test system for primary frequency modulation is realized in provinces and cities such as Shandong, Jiangsu and the like, the primary frequency modulation performance of the unit is tested by manually issuing a frequency deviation instruction, and as shown in fig. 2, the dynamic monitoring of the frequency modulation performance of the running unit is further realized. That is to say, the performance examination of the primary frequency modulation of the unit by the power grid can be divided into two categories, namely real disturbance examination and disturbance test examination. From the results of unit disturbance tests in recent years, the primary frequency modulation performance indexes of a considerable part of units can achieve values far exceeding the requirements of standard regulations such as GB/T30370 and the like, but because the existing power grid management department only carries out penalty check on unqualified units and does not have clear reward regulation on the excess frequency modulation contribution made by the units, a contradiction phenomenon exists among the current grid sources: on one hand, the frequency modulation capability of the power grid side is increasingly insufficient, and on the other hand, the power supply side unit still has the frequency modulation potential but cannot be exerted.
Disclosure of Invention
The primary frequency modulation assessment method and system based on reward and punishment double-track operation under different working conditions can monitor and analyze primary frequency modulation actions and working conditions of the unit, and reward and punishment assessment is performed according to different primary frequency modulation working conditions of the unit by adopting different assessment standards, so that assessment is more reasonable, contribution of the primary frequency modulation of the unit to power grid frequency adjustment is reasonably assessed through a reward and punishment mechanism, and power grid frequency adjustment capability is improved.
The first purpose of the disclosure is to provide a primary frequency modulation assessment method based on different working condition reward and punishment double-track operation, which comprises the following steps:
collecting relevant parameters of primary frequency modulation of the unit in real time, wherein the parameters comprise frequency, active power, main steam pressure and disturbance test signals;
and when the unit is judged to be in the primary frequency modulation disturbance test working condition through the acquired parameters, performing reward punishment on the unit through an excess frequency modulation compensation standard, and when the unit is judged to be in the primary frequency modulation disturbance test working condition, performing examination and evaluation on the unit by adopting a standard examination method.
Further, when the unit is judged to have primary frequency modulation effective action through the collected frequency, active power and main steam pressure and is judged to be in a primary frequency modulation real disturbance state through the disturbance test signal, the unit is judged to be in a primary frequency modulation real disturbance working condition, otherwise, the unit is judged to be in a primary frequency modulation disturbance test working condition.
Further, the primary frequency modulation action of the unit is judged by comparing the collected frequency with a frequency set value, the collected active power is compared with a power set value, the frequency modulation power compensation of the active power of the unit is judged, the collected main steam pressure is compared with a pressure set value, and the frequency modulation power compensation of the main steam pressure of the unit is judged.
Further, when the unit is judged to simultaneously generate primary frequency modulation action, active power generation frequency modulation power compensation and main steam pressure generation frequency modulation power compensation, the unit is judged to generate primary frequency modulation effective action, otherwise, the unit is judged not to generate primary frequency modulation effective action.
Further, the excess frequency modulation compensation standard is as follows: when the primary frequency modulation electric quantity contribution index in the actual action of the unit exceeds a qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the excess part of the reward is calculated, and when the primary frequency modulation electric quantity contribution index in the actual action of the unit is smaller than the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the penalty is calculated.
Further, the standard assessment method comprises the following steps: when the primary frequency modulation electric quantity contribution index in the actual action of the unit is smaller than the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the punishment amount is calculated, and when the primary frequency modulation electric quantity contribution index in the actual action of the unit exceeds the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the punishment amount is 0.
The second purpose of the disclosure is to provide a primary frequency modulation assessment system which operates on two tracks based on reward and punishment of different working conditions, and the primary frequency modulation assessment system is characterized by comprising a unit primary frequency modulation action judgment module, a digital quantity collector for collecting unit disturbance test signals and an analog quantity collector AI4 for collecting unit primary frequency modulation electric quantity contribution indexes; the output end of the unit primary frequency modulation action judgment module is connected with the first input end of a logic AND module AND2, the digital quantity collector is connected with the second input end of a logic AND module AND2 through a logic negation module AND a logic, the analog quantity collector AI4 is connected with a function setting module F1(x) AND a function setting module F2(x) through a subtracter DEV4, the function setting module F1(x) AND the function setting module F2(x) are connected with the input end of an analog quantity selector module, AND the output end of the logic AND module AND2 is connected with the position end of the analog quantity selector module; and the output end of the analog quantity selector module outputs a primary frequency modulation examination result of the unit.
Further, the unit primary frequency modulation action judgment module comprises an analog quantity collector AI1 for collecting a unit frequency value, an analog quantity collector AI2 for collecting a unit active power value, and an analog quantity collector AI3 for collecting a unit main steam pressure value;
the analog quantity collector AI1 is respectively connected with the input end of the first-order inertia module LAG1 and the first input end of the subtractor module DEV1, the output end of the first-order inertia module LAG1 is connected with the second input end of the subtractor module DEV1, and the output end of the subtractor module DEV1 is connected with the input end of the high-low amplitude alarm module HLALM 1; the analog quantity collector AI2 is respectively connected with the input end of the first-order inertia module LAG2 and the first input end of the subtractor module DEV2, the output end of the first-order inertia module LAG2 is connected with the second input end of the subtractor module DEV2, and the output end of the subtractor module DEV2 is connected with the input end of the high-low amplitude alarm module HLALM 2; the analog quantity collector AI3 is respectively connected with an input end of a first-order inertia module LAG3 AND a first input end of a subtracter module DEV3, an output end of the first-order inertia module LAG3 is connected with a second input end of the subtracter module DEV3, an output end of the subtracter module DEV3 is connected with an input end of a high-low amplitude alarm module HLALM3, AND an output end of the high-low amplitude alarm module HLALM1, an output end of the high-low amplitude alarm module HLALM2 AND an output end of the high-low amplitude alarm module HLALM3 are all connected with an input end Z3 of a logic AND module AND 1; the output of the logical AND-block AND1 is connected to a first input of the logical AND-block AND 2.
Further, when the high-low amplitude alarm modules all output high levels, the logic AND module AND1 outputs high levels, which indicates that the unit generates a primary frequency modulation effective action, otherwise, indicates that the unit does not generate the primary frequency modulation effective action; when the output end of the logical AND module AND2 is at a high level, the unit is in a primary frequency modulation real disturbance working condition, AND the analog quantity selector module outputs a calculation result of the function setting module F2 (x); when the output end of the logical AND module AND2 is at a low level, the unit is in a primary frequency modulation disturbance test working condition, AND the analog quantity selector module outputs a calculation result of the function setting module F1 (x).
A third objective of the present disclosure is to provide a computer-readable storage medium, configured to store a computer instruction, where the computer instruction, when executed by a processor, completes the steps of the primary frequency modulation assessment method based on different operating condition reward and punishment dual-rail operations.
Compared with the prior art, the beneficial effect of this disclosure is:
1. the monitoring and analysis of the effectiveness of the primary frequency modulation action of the grid-connected unit are realized through the changes of indexes such as frequency, unit active power, main steam pressure and the like, and the primary frequency modulation analysis and judgment of different working conditions of the unit are completed.
2. The contribution of the primary frequency modulation of the unit to the power grid frequency adjustment is reasonably judged through different reward and punishment mechanisms, so that the power grid frequency adjustment capability is improved, the contradiction problem existing in the network source frequency modulation is solved, and the stability of the power grid frequency is ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of evaluation and calculation of primary frequency modulation performance of a conventional unit;
FIG. 2 is a schematic diagram of a conventional PMU-based primary frequency modulation assessment system;
fig. 3 is a schematic diagram of a primary frequency modulation assessment system operating based on reward and punishment dual tracks of different working conditions.
The method comprises the following steps of 1, a power grid frequency value, 2, a primary frequency modulation theoretical action amplitude value and 3, a primary frequency modulation theoretical actual action amplitude value.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
Example 1
In order to realize the judgment of the primary frequency modulation performance index of the unit under different working conditions and reasonably judge the contribution of the primary frequency modulation of the unit to the power grid frequency adjustment through a reward and punishment mechanism, the power grid frequency adjustment capability is further improved, and the power grid frequency stability is ensured, the embodiment discloses a primary frequency modulation examination method based on reward and punishment double-track operation under different working conditions, which comprises the following steps of:
acquiring relevant parameters of primary frequency modulation of a unit in real time, wherein the relevant parameters of the primary frequency modulation of the unit mainly comprise frequency, active power, main steam pressure and disturbance test signals because the active power and the main steam pressure of the unit react most directly when the frequency changes;
when the unit is judged to generate primary frequency modulation effective action through the acquired frequency, active power and main steam pressure and is judged to be in a primary frequency modulation real disturbance state through a disturbance test signal, the unit is judged to be in a primary frequency modulation real disturbance working condition, otherwise, the unit is in a primary frequency modulation disturbance test working condition;
when the unit is in a primary frequency modulation real disturbance working condition, reward and punishment are carried out on the unit through an excess frequency modulation compensation standard so as to stimulate the unit with capability to promote the frequency modulation contribution;
when the unit is in the primary frequency modulation disturbance test working condition, the unit is assessed and evaluated by adopting a standard assessment method.
Comparing the collected frequency with a frequency set value, judging that the unit generates primary frequency modulation action, comparing the collected active power with a power set value, judging that the unit active power generates frequency modulation power compensation, comparing the collected main steam pressure with a pressure set value, and judging that the unit main steam pressure generates frequency modulation power compensation; and when the unit is judged to simultaneously generate primary frequency modulation action, active power generation frequency modulation power compensation and main steam pressure generation frequency modulation power compensation, the unit is judged to generate primary frequency modulation effective action, otherwise, the unit is judged not to generate primary frequency modulation effective action.
The frequency set value, the power set value and the pressure set value all refer to specific primary frequency modulation management regulations issued by each regional power grid.
The excess frequency modulation compensation standard is as follows: when the primary frequency modulation electric quantity contribution index in the actual action of the unit exceeds a qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the excess part of the reward is calculated, and when the primary frequency modulation electric quantity contribution index in the actual action of the unit is smaller than the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the penalty is calculated. The corresponding function is:
wherein Q isA% is the contribution index of primary frequency modulation electric quantity in the actual action of the unit, QB% is regional power grid primary frequency modulation that unit belongs toQualified threshold value of primary frequency modulation electric quantity contribution index, P, set in management regulationeAnd the rated power value of the unit.
The standard assessment method comprises the following steps: when the primary frequency modulation electric quantity contribution index in the actual action of the unit is smaller than the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the punishment amount is calculated, and when the primary frequency modulation electric quantity contribution index in the actual action of the unit exceeds the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the punishment amount is 0. The corresponding function is:
wherein Q isA% is the calculated value of the contribution index of the primary frequency modulation electric quantity in the actual action of the unit, QB% is qualified threshold value of primary frequency modulation electric quantity contribution index set in primary frequency modulation management regulation of regional power grid to which unit belongs, PeAnd the rated power value of the unit.
Example 2
In the embodiment, a primary frequency modulation assessment system based on reward and punishment dual-track operation under different working conditions is disclosed, and comprises a unit primary frequency modulation action judgment module, a digital quantity collector DI for collecting a unit disturbance test signal and an analog quantity collector AI4 for collecting a unit primary frequency modulation electric quantity contribution index;
the output end of the unit primary frequency modulation action judging module AND the logic are connected with a first input end Z1 of a module AND2, the digital quantity collector DI is connected with a second input end Z2 of the module AND2 through a logic negation module NOT AND the logic, the analog quantity collector AI4 is connected with a first input end X1 of a subtracter module DEV4, the output end of the subtracter module DEV4 is connected with a function setting module F1(X) AND a function setting module F2(X), the function setting module F1(X) is connected with a first input end X1 of an analog quantity selector module AXSEL, the function setting module F2(X) is connected with a second input end X2 of the analog quantity selector module AXSEL, AND the output end D of the logic AND module AND2 is connected with a setting end S of the analog quantity selector module AXSEL; and the output end of the analog quantity selector module AXSEL outputs a primary frequency modulation examination result of the unit.
The unit primary frequency modulation action judgment module comprises an analog quantity collector AI1 for collecting a unit frequency value, an analog quantity collector AI2 for collecting a unit active power value and an analog quantity collector AI3 for collecting a unit main steam pressure value;
the analog quantity collector AI1 is respectively connected with an input end X of a first-order inertia module LAG1 AND a first input end X1 of a subtractor module DEV1, an output end Y of the first-order inertia module LAG1 is connected with a second input end X2 of the subtractor module DEV1, an output end Y of the subtractor module DEV1 is connected with an input end X of a high-low amplitude alarm module HLALM1, AND an output end D of the high-low amplitude alarm module HLALM1 is connected with a first input end Z1 of a logic AND module AND 1;
the analog quantity collector AI2 is respectively connected with an input end X of a first-order inertia module LAG2 AND a first input end X1 of a subtractor module DEV2, an output end Y of the first-order inertia module LAG2 is connected with a second input end X2 of the subtractor module DEV2, an output end Y of the subtractor module DEV2 is connected with an input end X of a high-low amplitude alarm module HLALM2, AND an output end D of the high-low amplitude alarm module HLALM2 is connected with a second input end Z2 of the logic AND module AND 1;
the analog quantity collector AI3 is respectively connected with an input end X of a first-order inertia module LAG3 AND a first input end X1 of a subtracter module DEV3, an output end Y of the first-order inertia module LAG3 is connected with a second input end X2 of the subtracter module DEV3, an output end Y of the subtracter module DEV3 is connected with an input end X of a high-low amplitude alarm module HLALM3, AND an output end D AND logic of the high-low amplitude alarm module HLALM3 are connected with a third input end Z3 of the module AND 1;
the output D of the block AND1 AND the logic are connected to a first input Z1 of a block AND 2.
The setting end of the first-order inertia module LAG1 receives the value set by the analog generator a1, and the setting end can be set to 0.5-1 second in consideration of the rapidity of frequency and the periodicity of sampling.
The digital end of the first-order inertia module LAG2 and the digital end of the first-order inertia module LAG3 receive the value set by the analog generator A2, and the units are required to react within 3 seconds according to related technical standards such as GB/T30370 Primary frequency modulation test and Performance acceptance guide rules of thermal generator sets, Q/GDW 669 Primary frequency modulation test guide rules of thermal generator sets and the like, and the changes of active power and main steam pressure are in a synchronous and inverse proportional relation and can be generally set to 2-3 seconds.
The high-low amplitude alarm module HLALM1 is used for judging whether the unit should perform primary frequency modulation action according to related technical standard requirements such as GB/T30370 'Primary frequency modulation test and Performance acceptance guide rule of thermal power generating units', Q/GDW 669 'Primary frequency modulation test guide rule of thermal power generating units', the dead zone of the thermal power generating unit is controlled within +/-0.033 Hz, so the high amplitude H is generally set to be 0.033, and the low amplitude L is generally set to be-0.033.
The high-amplitude end of the high-amplitude alarm module HLALM2 receives a numerical value set by the analog quantity generator A3, the numerical value set by the low-amplitude end receiving analog quantity generator A3 is multiplied by-1 through the multiplier module MUL1 to obtain a numerical value, the numerical value is used for judging whether the active power of the unit generates frequency modulation power compensation, and the numerical value can be generally set to 0.3-0.5 by considering that spike type interference exists in the active power of the unit in the transmitter acquisition process and the like.
The high-amplitude end and low-amplitude end of the high-amplitude alarm module HLALM3 are used for receiving a numerical value set by the analog quantity generator A4, and the numerical value set by the low-amplitude end of the high-amplitude end of the low-amplitude end of the high-amplitude end of the low-amplitude end of the high-amplitude end of.
The analog quantity generator A5 is set according to a qualified threshold value of a primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the local power grid, and the range is generally 60% -80%.
The first order inertia module LAG1, the first order inertia module LAG2 and the first order inertia module LAG3 are all expressed by formulas
Wherein, the value of K is 1, s is function independent variable, and the value of T is the input value of a setting terminal D.
The function setting module F1(x) and the function setting module F2(x) are both polygonal line functions, the input is a primary frequency modulation electric quantity contribution index collected in a primary frequency modulation examination system, and the output is a primary frequency modulation examination electric quantity value, wherein the function setting module F1(x) is provided with a standard examination method as follows: when the primary frequency modulation electric quantity contribution index in the actual action of the unit is smaller than the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the punishment amount is calculated, and when the primary frequency modulation electric quantity contribution index in the actual action of the unit exceeds the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the punishment amount is 0. The correspondence function, is:
wherein Q isA% is the calculated value of the contribution index of the primary frequency modulation electric quantity in the actual action of the unit, QB% is qualified threshold value of primary frequency modulation electric quantity contribution index set in primary frequency modulation management regulation of regional power grid to which unit belongs, PeAnd the rated power value of the unit.
The function setting module F1(x) sets the overshoot compensation criterion as: when the primary frequency modulation electric quantity contribution index in the actual action of the unit exceeds a qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the excess part of the reward is calculated, and when the primary frequency modulation electric quantity contribution index in the actual action of the unit is smaller than the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the penalty is calculated. The correspondence function, is:
wherein Q isA% is the calculated value of the contribution index of the primary frequency modulation electric quantity in the actual action of the unit, QB% is set in primary frequency modulation management regulation of regional power grid to which unit belongsQualified threshold value, P, of frequency modulation electric quantity contribution indexeAnd the rated power value of the unit.
The analog quantity selector module AXSEL determines an output path according to the state of the position terminal S: s ═ 1, Y ═ X1; s is 0, Y is X2, when the unit is in the primary frequency modulation disturbance real working condition, the reward and punishment electric quantity value is output by the excess frequency modulation compensation standard, when the unit is in the primary frequency modulation test disturbance working condition, the examination electric quantity value is output by the standard examination method.
The high-low amplitude alarm module HLALM determines to output according to the input value X and the set high amplitude H and low amplitude L: x > H, D ═ 1; x < L, D ═ 1; l < X < H, D is 0, which indicates that the unit has primary fm active action when the AND logic AND module AND1 outputs high level, AND otherwise, indicates that the unit has no primary fm active action.
Specific examples are as follows:
taking the Shandong power grid in the North China as an example, there are three DC lines of Yidong DC, Shangu DC and Zhayi DC in provinces, and the total DC power is about 7000 MW. Taking a certain 300MW positive pressure direct blowing type unit in the power grid as an example, the rotating speed unequal rate of the unit is specified to be 5%, and the primary frequency modulation dead zone range is 50 +/-0.033 Hz.
In the system, the analog generator a1 was set to 1 second, the analog generator a2 was set to 2 seconds, the analog generator A3 was set to 0.5MW, the analog generator a4 was set to 0.1MPa, and the analog generator a5 was set to 70%.
The corresponding function between the output and the input in the function setting module F1(x) is:
the corresponding function between the output and the input in the function setting module F2(x) is:
and on a certain day, the Yintong direct current electrode II is locked, a direct current line fault signal is sent out, the direct current power transmitted by the external power is changed from 1935MW to 0MW, the frequency of the power grid is dropped to 49.93Hz, and the duration time exceeds 60 s. The starting point time of the secondary primary frequency modulation is 04:05:18, the active power of the unit is 240.21MW, the frequency is 49.99Hz, and the main steam pressure is 15.90 Mpa; 04:05:19 the active power of the unit is 240.20MW, the frequency is 49.93Hz, and the main steam pressure is 15.89 Mpa; the 04:05:20 unit active power is 241.28MW, the frequency is 49.93Hz, and the main steam pressure is 15.72 Mpa. The electric quantity contribution value obtained in the primary frequency modulation assessment system is 93%.
The secondary frequency modulation is real frequency disturbance, the setting end of a first-order inertia module LAG1 is 1, the output of a subtracter module DEV1 is 49.93-49.99-0.06, and the output of a high-low amplitude alarm module HLALM1 is high level 1 because-0.033 < -0.06; the setting end of the first-order inertia module LAG2 is 2, the output of the subtractor module DEV2 is 241.28-240.21 equals 1.07, and because 1.07 is greater than 0.5, the output of the high-low amplitude alarm module HLALM2 is high level 1; the setting end of the first-order inertia module LAG3 is 2, the output of the subtractor module DEV3 is 15.72-15.90 ═ 0.18, and the output of the high and low amplitude alarm module HLALM3 is high level 1 because-0.18 < -0.1; that is, since the three inputs of the AND logic block AND1 are all at high level 1, the output of the AND logic block AND1 is at high level 1, AND the "primary tuning" is enabled AND sent to the first input Z1 of the AND logic block AND 1.
At this time, the disturb test signal is at low level 0, AND is at high level 1 after being inverted by the NOT block NOT, AND the second input terminal Z2 of the AND block AND2 is at high level 1, so that the output of the AND block AND2 is at high level 1. The setting end S of the analog quantity selector module AXSEL is high level 1, and outputs the value of the first input end X1, namely the output value of the output function setting module F2(X), because the electric quantity contribution value obtained in the primary frequency modulation check system is 93 percent, and 70 percent is less than or equal to 93 percent<100%, so the output is (Q)AAnd percent-70 percent of 300-69 percent of 300-93-70 percent of 300-69 percent of the power unit, namely the original power amount is rewarded to be 0MWh and is increased to be 69MWh in the primary frequency modulation action due to the excellent action of the power unit, and the frequency modulation potential of the power unit is exerted through an incentive policy.
Example 3
In this embodiment, a computer readable storage medium is disclosed for storing computer instructions which, when executed by a processor, perform the steps of the method of embodiment 1.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (9)
1. The primary frequency modulation assessment system based on different working conditions reward and punishment double-track operation is characterized by comprising a unit primary frequency modulation action judgment module, a digital quantity collector for collecting unit disturbance test signals and an analog quantity collector AI4 for collecting unit primary frequency modulation electric quantity contribution indexes;
the output end of the unit primary frequency modulation action judgment module is connected with the first input end of a logic AND module AND2, the digital quantity collector is connected with the second input end of a logic AND module AND2 through a logic negation module AND a logic, the analog quantity collector AI4 is connected with a function setting module F1(x) AND a function setting module F2(x) through a subtracter DEV4, the function setting module F1(x) AND the function setting module F2(x) are connected with the input end of an analog quantity selector module, AND the output end of the logic AND module AND2 is connected with the position end of the analog quantity selector module; the output end of the analog quantity selector module outputs a unit primary frequency modulation examination result;
the unit primary frequency modulation action judgment module comprises an analog quantity collector AI1 for collecting a unit frequency value, an analog quantity collector AI2 for collecting a unit active power value and an analog quantity collector AI3 for collecting a unit main steam pressure value;
the analog quantity collector AI1 is respectively connected with the input end of the first-order inertia module LAG1 and the first input end of the subtractor module DEV1, the output end of the first-order inertia module LAG1 is connected with the second input end of the subtractor module DEV1, and the output end of the subtractor module DEV1 is connected with the input end of the high-low amplitude alarm module HLALM 1; the analog quantity collector AI2 is respectively connected with the input end of the first-order inertia module LAG2 and the first input end of the subtractor module DEV2, the output end of the first-order inertia module LAG2 is connected with the second input end of the subtractor module DEV2, and the output end of the subtractor module DEV2 is connected with the input end of the high-low amplitude alarm module HLALM 2; the analog quantity collector AI3 is respectively connected with an input end of a first-order inertia module LAG3 AND a first input end of a subtracter module DEV3, an output end of the first-order inertia module LAG3 is connected with a second input end of the subtracter module DEV3, an output end of the subtracter module DEV3 is connected with an input end of a high-low amplitude alarm module HLALM3, AND an output end of the high-low amplitude alarm module HLALM1, an output end of the high-low amplitude alarm module HLALM2 AND an output end of the high-low amplitude alarm module HLALM3 are all connected with an input end Z3 of a logic AND module AND 1; the output terminal of the logical AND-block AND1 is connected to a first input terminal of the logical AND-block AND 2;
the corresponding function between the output and the input in the function setting module F1(x) is:
the corresponding function between the output and the input in the function setting module F2(x) is:
wherein Q isA% is the calculated value of the contribution index of the primary frequency modulation electric quantity in the actual action of the unit, QB% is qualified threshold value of primary frequency modulation electric quantity contribution index set in primary frequency modulation management regulation of regional power grid to which unit belongs, PeRated work for the unitThe value is obtained.
2. The primary frequency modulation assessment system based on different working condition reward AND punishment dual-track operation as claimed in claim 1, wherein when the high-low amplitude alarm modules all output high levels, the logic AND module AND1 outputs high levels to indicate that the unit generates primary frequency modulation effective actions, otherwise, the unit does not generate primary frequency modulation effective actions; when the output end of the logical AND module AND2 is at a high level, the unit is in a primary frequency modulation real disturbance working condition, AND the analog quantity selector module outputs a calculation result of the function setting module F2 (x); when the output end of the logical AND module AND2 is at a low level, the unit is in a primary frequency modulation disturbance test working condition, AND the analog quantity selector module outputs a calculation result of the function setting module F1 (x).
3. The primary frequency modulation assessment method based on different working condition reward and punishment dual-track operation of the assessment system as claimed in claim 1, which is characterized by comprising the following steps:
collecting relevant parameters of primary frequency modulation of the unit in real time, wherein the parameters comprise frequency, active power, main steam pressure and disturbance test signals;
and when the unit is judged to be in the primary frequency modulation disturbance test working condition through the acquired parameters, performing reward punishment on the unit through an excess frequency modulation compensation standard, and when the unit is judged to be in the primary frequency modulation disturbance test working condition, performing examination and evaluation on the unit by adopting a standard examination method.
4. The primary frequency modulation assessment method based on different working condition reward and punishment dual-track operation of claim 3, wherein when the unit is judged to generate primary frequency modulation effective action through the collected frequency, active power and main steam pressure, and the unit is judged to be in a primary frequency modulation real disturbance state through the disturbance test signal, the unit is judged to be in a primary frequency modulation real disturbance working condition, otherwise, the unit is judged to be in a primary frequency modulation disturbance test working condition.
5. The primary frequency modulation assessment method based on reward and punishment dual-rail operation under different working conditions as claimed in claim 3, wherein the primary frequency modulation action of the unit is judged by comparing the collected frequency with a frequency set value, the collected active power is compared with a power set value, the frequency modulation power compensation of the active power of the unit is judged, and the frequency modulation power compensation of the main steam pressure of the unit is judged by comparing the collected main steam pressure with a pressure set value.
6. The primary frequency modulation assessment method based on different working condition reward and punishment dual-track operation as claimed in claim 5, characterized in that when the unit is judged to simultaneously generate primary frequency modulation action, active power generation frequency modulation power compensation and main steam pressure generation frequency modulation power compensation, the unit is judged to generate primary frequency modulation effective action, otherwise, the unit is judged not to generate primary frequency modulation effective action.
7. The primary frequency modulation assessment method based on different working condition reward and punishment double-track operation as claimed in claim 3, characterized in that the excess frequency modulation compensation standard is as follows: when the primary frequency modulation electric quantity contribution index in the actual action of the unit exceeds a qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the excess part of the reward is calculated, and when the primary frequency modulation electric quantity contribution index in the actual action of the unit is smaller than the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the penalty is calculated.
8. The primary frequency modulation assessment method based on different working condition reward and punishment dual-track operation as claimed in claim 3, characterized in that the standard assessment method is as follows: when the primary frequency modulation electric quantity contribution index in the actual action of the unit is smaller than the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the punishment amount is calculated, and when the primary frequency modulation electric quantity contribution index in the actual action of the unit exceeds the qualified threshold value of the primary frequency modulation electric quantity contribution index set in the primary frequency modulation management regulation of the regional power grid to which the unit belongs, the punishment amount is 0.
9. A computer-readable storage medium storing computer instructions which, when executed by a processor, perform the steps of the method of any one of claims 3 to 8.
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