A monitoring system for a low frequency load shed device

Abstract

The application relates to a monitoring system of a low-frequency load shedding device applied to the power supply or power distribution field, which comprises a device body, an executing mechanism arranged in the device body, a DSP operation processing unit carried in the device body and double-set redundant links connected with the device body, adopts the setting of a double-set redundant link data acquisition unit, a scheduling control feedback unit, a reserved re-verification unit, a prediction scheduling emergency unit and a load control emergency recovery unit, can promote the fusion of multi-source information in the application process of the monitoring system, can predict and apply the intermittence and fluctuation of new energy on one hand, can re-verify the data after load control on the other hand, reduces the data error generated due to the previous action, reduces the misoperation of the device body, guarantees the effectiveness and safety of the load shedding of the device body, effectively improves the monitoring accuracy and stability of the monitoring system on the power grid frequency data, and avoids the misoperation or missed operation phenomenon.

Description

TECHNICAL FIELD

[0001] The present application relates to a monitoring system, in particular to a monitoring system of a low-frequency load shedding device applied in the field of power supply or power distribution. BACKGROUND

[0002] The low-frequency load shedding device is a protective measure designed to cut off part of the non-core load in an automatic or manual manner to deal with the situation of frequency drop caused by active power shortage in the power system. The device can quickly respond and prevent the continuous decline of frequency, thereby avoiding the frequency collapse of the system. In the process of ensuring that the power system can respond in time and implement load shedding when facing active power shortage, the monitoring system of the low-frequency load shedding device plays a crucial role.

[0003] The monitoring system is usually composed of key parts such as a data acquisition unit, a communication network, a monitoring center, and an execution mechanism. The data acquisition unit is responsible for collecting real-time frequency and load of the power grid and other key parameters; the communication network transmits these data to the monitoring center; the monitoring center processes, analyzes and judges these data, and then issues control instructions according to the preset logic; finally, the execution mechanism receives the instructions and is responsible for the actual execution of the load shedding operation.

[0004] However, with the large-scale distributed new energy connected to the power grid, new security challenges have been brought to the power system. The power output of new energy is affected by environmental factors and has obvious intermittency and volatility. This characteristic makes the change of power grid frequency more diverse, making it difficult for the monitoring system to effectively predict and adapt to this volatility. Therefore, how to strengthen the prediction and control ability of the monitoring system for new energy power, ensure the monitoring accuracy and stability of the power grid frequency data, and avoid the phenomenon of mis-cutting or missing cutting, has become an important problem to be solved for the monitoring system of the low-frequency load shedding device. SUMMARY

[0005] In view of the above prior art, the technical problem to be solved by the present application is how to strengthen the prediction and control ability of the monitoring system for new energy power, ensure the monitoring accuracy and stability of the power grid frequency data, and avoid the phenomenon of mis-cutting or missing cutting.

[0006] To solve the above problems, the present application provides a monitoring system of a low-frequency load shedding device, comprising a device body, an execution mechanism arranged in the device body, a DSP operation processing unit carried in the device body, and a double-redundancy link connected with the device body, the input end of the DSP operation processing unit is connected with a double-redundancy link data acquisition unit, a scheduling and control feedback unit, a power grid parameter acquisition unit, a full-weather data acquisition unit, and a reserved re-verification unit.

[0007] The output end of the DSP operation processing unit is connected with a load scheduling control unit, a trend prediction unit and a load control emergency recovery unit, the output end of the trend prediction unit is connected with a prediction scheduling emergency unit, and the input ends of a reserved re-verification unit and a scheduling control feedback unit are connected with the double-redundancy link data acquisition unit.

[0008] The actuator comprises an execution fixed piece fixedly arranged in the actuator and a main execution moving piece rotatably arranged in the actuator, the main execution moving piece is matched with the execution fixed piece, the execution fixed piece is fixedly connected with a compensation conversion mechanism at the lower end, and the compensation conversion mechanism is fixedly connected with a secondary execution moving piece matched with the main execution moving piece and the execution fixed piece.

[0009] The input end of the double-redundancy link data acquisition unit is connected with a double-redundancy link signal, the input ends of a power grid parameter acquisition unit and a full-weather data acquisition unit are connected with a monitoring center signal, the output end of the load scheduling control unit is connected with an execution mechanism signal, the output end of the prediction scheduling emergency unit is connected with a DSP operation processing unit and a load scheduling control unit signal, and the output end of the load control emergency recovery unit is connected with a compensation conversion mechanism signal.

[0010] In the monitoring system of the low-frequency load shedding device, the monitoring system can promote the fusion of multi-source information during application, predict and adapt to the intermittency and volatility of new energy, re-verify data after load control, effectively improve the monitoring accuracy and stability of power grid frequency data, and avoid false tripping or missed tripping.

[0011] As a supplement to the application, the compensation conversion mechanism comprises an elastic sleeve fixedly connected to the lower end of the execution fixed piece, the elastic sleeve is fixedly connected with the secondary execution moving piece at the lower end, the secondary execution moving piece is fixedly connected with a plurality of communication wires at the upper end, the communication wires penetrate through the elastic sleeve at the lower end and are fixedly connected with the execution fixed piece, the upper and lower inner walls of the elastic sleeve are fixedly connected with electromagnetic control blocks, and the output end of the load control emergency recovery unit is connected with the electromagnetic control blocks.

[0012] As a supplement to the application, the device body is connected with a double-redundancy link and a monitoring center through a telemechanical communication channel, and the telemechanical communication channel adopts an IEC104 protocol.

[0013] As a supplement to the application, the output end of the DSP operation processing unit is also connected with a data display unit, and the output end of the data display unit is connected with a display and display lamp beads arranged at the left end of the device body.

[0014] As a further improvement of the present application, the electromagnetic control blocks at the upper and lower corresponding positions are fixedly connected to an elastic trigger bar at one end thereof, and the input end of the DSP operation processing unit is also connected to a compensation mechanism state feedback unit, and the input end of the compensation mechanism state feedback unit is connected to the elastic trigger bar signal.

[0015] As a further improvement of the present application, the input end of the DSP operation processing unit is also connected to a closing data acquisition unit, and the input end of the closing data acquisition unit is connected to the actuator signal provided in the device body.

[0016] As a further improvement of the present application, the DSP operation processing unit includes a data acquisition receiving module and a verification data receiving module. The input end of the data acquisition receiving module is respectively connected to the dual redundant link data acquisition unit, the power grid parameter acquisition unit, the full meteorological data acquisition unit and the closing data acquisition unit signal. The output end of the data acquisition receiving module is connected to the data coarse processing module.

[0017] The input end of the verification data receiving module is respectively connected to the reserved re-verification unit, the scheduling control feedback unit and the prediction scheduling emergency unit signal, and the output end of the verification data receiving module is connected to the verification data processing module;

[0018] The output ends of the data coarse processing module and the verification data processing module are both connected to the comprehensive optimization processing module signal, the output end of the comprehensive optimization processing module is connected to the optimization scheduling instruction transmission module, and the output end of the data coarse processing module is also connected to the optimization scheduling instruction transmission module signal, and the instruction priority of the data coarse processing module is lower than the instruction priority of the comprehensive optimization processing module;

[0019] The output end of the optimized dispatch instruction transmission module is respectively connected to the load dispatch control unit, the load control emergency recovery unit and the trend prediction unit signal.

[0020] As another improvement of the present application, the reservation re-verification unit includes a link comprehensive judgment module and a quality comprehensive judgment module, the output ends of the link comprehensive judgment module and the quality comprehensive judgment module are connected to the reservation verification processing module, and the output end of the reservation verification processing module is connected to the access data output module and the abnormal data output module;

[0021] The input end of the link comprehensive judgment module is connected to the link launch and withdrawal status acquisition module and the link terminal status acquisition module. The input ends of the link launch and withdrawal status acquisition module, the link final status acquisition module and the quality comprehensive judgment module are all connected to the dual sets of redundant link data acquisition unit signals, and the output ends of the access data output module and the abnormal data output module are both connected to the DSP operation processing unit signal.

[0022] As a further improvement of the present application, the double-redundant link includes an A-link and a B-link connected to the device body signal respectively, and the link on-off state acquisition module acquires the on-off state data of the double-redundant link through the double-redundant link data acquisition unit, the on-off state data including the on-off data of the A-link, the on-off data of the B-link, and the common on-off data of the A-link and the B-link;

[0023] The link terminal state acquisition module acquires the interruption state data of the double-redundant link through the double-redundant link data acquisition unit, the interruption state data including the interruption data of the A-link, the interruption data of the B-link, and the common interruption data of the A-link and the B-link;

[0024] The quality comprehensive judgment module acquires and judges the data quality of the double-redundant link through the double-redundant link data acquisition unit, the data quality including the data quality of the A-link and the data quality of the B-link, and further assisting the reserved verification processing module to judge the effectiveness of the data quality transmitted by the link comprehensive judgment module.

[0025] In summary, through the setting of the double-redundant link data acquisition unit, the scheduling and control feedback unit, the reserved re-verification unit, the prediction scheduling emergency unit, and the load control emergency recovery unit, the application of the monitoring system can promote the fusion of multi-source information, on the one hand, the intermittence and volatility of new energy can be predicted and applied, and when the new energy processing decreases, enough composite can be cut off in time to stabilize the power grid, promoting the protection of the power grid, on the other hand, the data can be re-verified after load control, reducing the data error caused by the previous action, reducing the misoperation of the device body, ensuring the effectiveness and safety of the device body load shedding, effectively improving the monitoring accuracy and stability of the power grid frequency data of the monitoring system, and avoiding the phenomenon of misoperation or missed operation. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The operation logic diagram of the monitoring system of the first to third embodiments of the present application;

[0027] Figure 2 The device body axis drawing of the first to third embodiments of the present application;

[0028] Figure 3 The front internal perspective view of the device body of the first to third embodiments of the present application;

[0029] Figure 4 The local cross-sectional view of the actuator of the first embodiment of the present application in the load shedding state;

[0030] Figure 5 The local cross-sectional view of the actuator of the first embodiment of the present application in the load shedding state; Figure 4A partial enlarged view of the middle A;

[0031] Figure 6 This is a partial enlarged view of the actuator of the first embodiment of the present application when the compensation conversion mechanism and the load control emergency recovery unit are in effect in the load shedding state;

[0032] Figure 7 This is a partial cross-sectional view of the actuator of the first embodiment of the present application in the closed state;

[0033] Figure 8 For the first embodiment of this application Figure 7 A partial enlarged view of point B in the middle;

[0034] Figure 9 This is a partial enlarged view of the actuator of the first embodiment of the present application when the compensation conversion mechanism and the load control emergency recovery unit are in effect in the closed state;

[0035] Figure 10 This is an operational logic diagram of the monitoring system according to the second embodiment of the present application;

[0036] Figure 11 This is an operational logic diagram of the monitoring system according to the third embodiment of the present application;

[0037] Figure 12 This is a logic diagram for running the reserved re-verification unit of the third embodiment of the present application when pre-processing the collected data.

[0038] Description of the numbers in the figure:

[0039] 1 device body, 11 scheduling cavity, 2 actuator, 21 main actuator rotor, 22 actuator fixed plate, 3 compensation conversion mechanism, 31 elastic sleeve, 32 electromagnetic control block, 33 elastic trigger bar, 4 secondary actuator rotor, 41 connecting wire. DETAILED DESCRIPTION

[0040] The following describes three implementation methods of the present application in detail with reference to the accompanying drawings.

[0041] The first implementation method:

[0042] Figure 1 - Figure 9The monitoring system for an under-frequency load shedding device is shown, comprising a device body 1, an actuator 2 disposed within the device body 1, a DSP operation processing unit mounted within the device body 1, and dual redundant links connected to the device body 1. A dispatching chamber 11 is provided within the device body 1, within which multiple actuators 2 are fixedly installed. The multiple actuators 2 are respectively connected to corresponding loads, new energy lines, and backup power supplies. The input end of the DSP operation processing unit is connected to a dual redundant link data acquisition unit, a dispatching and control feedback unit, a power grid parameter acquisition unit, a full meteorological data acquisition unit, and a reserved re-verification unit.

[0043] The output end of the DSP operation processing unit is connected to the load dispatching and control unit, the trend prediction unit and the load control emergency recovery unit. The output end of the trend prediction unit is connected to the forecast dispatching emergency unit. The input ends of the reserved re-verification unit and the dispatching and control feedback unit are both connected to the dual sets of redundant link data acquisition unit signals.

[0044] The actuator 2 includes an actuator stator 22 fixedly disposed therein and a primary actuator plate 21 rotatably disposed therein, wherein the primary actuator plate 21 cooperates with the actuator stator 22. A compensation conversion mechanism 3 is fixedly disposed at the lower end of the actuator stator 22. The lower end of the compensation conversion mechanism 3 is fixedly connected to a secondary actuator plate 4 that cooperates with the primary actuator plate 21 and the actuator stator 22 respectively.

[0045] The input end of the dual-redundant link data acquisition unit is connected to the dual-redundant link signal, the input end of the power grid parameter acquisition unit and the full meteorological data acquisition unit are both connected to the monitoring center signal, the output end of the load dispatching and control unit is connected to the actuator 2 signal, the output end of the prediction and dispatching emergency unit is respectively connected to the DSP operation processing unit and the load dispatching and control unit signal, and the output end of the load control emergency recovery unit is connected to the compensation conversion mechanism 3 signal. By setting up the dual-redundant link data acquisition unit, the dispatching and control feedback unit, the reserved re-verification unit, the prediction and dispatching emergency unit, and the load control emergency recovery unit, the monitoring system can promote the integration of multi-source information during its application. On the one hand, it can predict and adapt to the intermittent and fluctuating nature of new energy. When the new energy processing power decreases, it can timely and effectively cut off sufficient load to stabilize the power grid and promote the protection of the power grid. On the other hand, it can re-verify the data after load control, reduce the data error caused by the previous stage action, reduce the possibility of malfunction of the device body 1, ensure the effectiveness and safety of the load shedding of the device body 1, effectively improve the accuracy and stability of the monitoring system of the power grid frequency data, and avoid malfunction or missed switching.

[0046] Figure 1 - Figure 9The device body 1 is connected with the double-redundancy link and the monitoring center signal through the telemechanism communication channel, the telemechanism communication channel adopts the IEC104 protocol, the device body 1 and the telemechanism communication channel are established, the key information such as the equipment running state, various AC electrical quantities, the required cutting load, the actual cutting load and the pressure plate state can be directly uploaded to the monitoring system through the telemechanism communication channel, the construction of the signal protection substation is saved, the three lines of defense can be observed and measured in a relatively simple way, and the double-redundancy link and the telemechanism communication channel can also save the construction cost and reduce the field construction amount on the basis of guaranteeing the sampling reliability to the maximum extent.

[0047] The IEC104 protocol is a standard for transmitting the application service data unit (ASDU) of the IEC101 by the network protocol TCP / IP, and provides a communication protocol basis for the network transmission of the telemechanism information.

[0048] After the combination of the 104 protocol and the ASDU of the 101 protocol, the standardization of the protocol and the reliability of the communication can be well guaranteed, and the overall structure of the protocol is shown in Table 1.

[0049] Table 1 IEC104 protocol frame format

[0050]

[0051] The IEC104 protocol is not only used for the information transmission between the device body (1) and the double-redundancy link and the monitoring center, but also widely used for the information interaction between various devices in the station, such as the AGC / AVC, the power prediction, the primary frequency modulation, the energy storage EMS and the like, the delay of the station communication can be controlled in the order of seconds, and the data invalidity discrimination mechanism is perfect, so that the reliability is high.

[0052] Figure 1 - Figure 3 The output end of the DSP operation processing unit is also connected with the data display unit, the output end of the data display unit is connected with the display and the display lamp bead arranged at the left end of the device body 1, the arrangement of the data display unit can effectively promote the cooperation between the monitoring system and the maintenance personnel, reduce the maintenance difficulty, and promote the safety of the power grid operation.

[0053] Figure 4 - Figure 9The compensation conversion mechanism 3 is shown to include an elastic sleeve 31 fixedly connected to the lower end of the execution fixed piece 22, the lower end of the elastic sleeve 31 is fixedly connected with the secondary execution moving piece 4, the upper end of the secondary execution moving piece 4 is fixedly connected with a plurality of communication wires 41, the lower end of the communication wire 41 penetrates through the elastic sleeve 31 and is fixedly connected with the execution fixed piece 22, the inner walls of the elastic sleeve 31 are fixedly connected with electromagnetic control blocks 32, the output end of the load control emergency recovery unit is signal connected with the electromagnetic control blocks 32, and the electromagnetic control blocks 32 are provided with the load control emergency recovery unit. When the load control fails, the load state can be controlled in time to reduce the economic loss caused by the failure and the damage of the equipment of the power grid, effectively ensure the monitoring and control accuracy, data verification effectiveness, emergency timeliness and fluctuation applicability of the monitoring system, promote the functionality of the device body 1, make it can be effectively applied to the protection of the current new energy into the power grid, and ensure the stability and safety of the power grid.

[0054] Figure 4 - Figure 9 The electromagnetic control blocks 32 in the corresponding positions are fixedly connected with elastic trigger strips 33 at one end, the input end of the DSP operation processing unit is also connected with a compensation mechanism state feedback unit, the input end of the compensation mechanism state feedback unit is signal connected with the elastic trigger strips 33, and the compensation mechanism state feedback unit is provided. The effectiveness of the monitoring and control of the monitoring system can be further promoted, the data of the compensation conversion mechanism 3 itself can be verified when the emergency load control function is generated, and the effectiveness and direction accuracy of the emergency recovery can be ensured.

[0055] Figure 1 - Figure 9 During the operation of the device body 1, the DSP operation processing unit in the monitoring system can obtain the power grid parameters sent by the monitoring center through the power grid parameter acquisition unit, including but not limited to substation data, new energy data and load data, etc. The weather data acquisition unit and the monitoring center can also cooperate to collect the meteorological data of the region where the new energy is located, which can effectively facilitate the DSP operation processing unit to judge the frequency of the power grid and judge the subsequent load selection;

[0056] Meanwhile, the double-redundant link data acquisition unit acquires data of the double-redundant link and respectively transmits the data to the DSP operation processing unit, the reserved re-verification unit and the scheduling control feedback unit. After receiving the double data, the DSP operation processing unit pre-processes the data of the link at this time. The reserved re-verification unit re-verifies the received double data to determine the validity and accuracy of the data, and then transmits the verified data to the DSP operation processing unit. The DSP operation processing unit selects and uses the pre-processed data according to the verification data. The scheduling control feedback unit retrieves and feeds back the related data generated by the previous stage control action, and then feeds back the data to the DSP operation processing unit, so that the DSP operation processing unit judges the current data. After receiving the previous stage instruction feedback data, the DSP operation processing unit performs data interval action to avoid the error triggering of the next stage control action caused by the frequency rise after the previous stage control action is executed, and causes unnecessary load shedding action.

[0057] Then, according to the collected power grid frequency data, the data display unit is instructed to display data, so that the data display unit displays data through the display and display lamp beads. The load control scheduling unit is also instructed to control the load, so that the load control unit controls the actuator 2 to act and selects the load to be cut off, so as to ensure the stability of the power grid. At the same time, all the monitored data is transmitted to the trend prediction unit. The trend prediction unit can process and judge the monitoring data, and then predict the load state according to the time period and predict the new energy fluctuation according to the meteorological data, and transmit the prediction data to the prediction scheduling emergency unit. After receiving the trend prediction data, the prediction scheduling emergency unit processes the data with abnormal fluctuation, and then transmits the prediction control data to the DSP operation processing unit and the load control scheduling unit respectively. The DSP operation processing unit processes and judges the prediction data, and the load control scheduling unit stores the prediction control data. After the DSP operation processing unit verifies the prediction data through subsequent collected data, the load control scheduling unit is directly transmitted with the prediction control instruction, so that the load control scheduling unit can control the actuator 2 according to the prediction control data. The speed and accuracy of load shedding control in the subsequent power grid frequency fluctuation process are improved, the applicability of the monitoring system to the new energy integrated into the power grid is improved, and the protection effectiveness of the device body 1 is ensured.

[0058] In the process of DSP operation processing unit regulating and controlling the actuator 2 through the load scheduling and control unit according to the collected data, the DSP operation processing unit can effectively judge the deformation state of the compensation conversion mechanism 3 at this time through the compensation mechanism state feedback unit to the data whether the elastic trigger strip 33 is triggered, so as to ensure the stability of the shape of the elastic sleeve 31, and when the subsequent data collected by the DSP operation processing unit continuously shows load shedding abnormality or load closing abnormality or due to sudden drop or rise of new energy output, the DSP operation processing unit will transmit emergency control data to the load control emergency recovery unit, so that the load control emergency recovery unit sends control instructions to the electromagnetic control block 32;

[0059] When the actuator 2 appears closing abnormality or needs to generate closing action control, the load control emergency recovery unit controls the upper and lower electromagnetic control blocks 32 to generate repulsive electromagnetic action, which makes the elastic sleeve 31 produce elastic elongation deformation under the action of electromagnetic repulsive force, and then drives the secondary execution moving piece 4 to move downward and actively resist the main execution moving piece 21, so as to realize the connection of the main execution moving piece 21 and the execution fixed piece 22 through the conduction of the secondary execution moving piece 4 and the communication wire 41, complete the compensation control of the closing action of the actuator 2, effectively cope with the closing abnormality of the actuator 2, promote the effectiveness of the load control unit, or directly execute the closing action of the actuator 2, keep the load control instruction of the DSP operation processing unit unchanged, avoid feedback abnormality of subsequent data control, at the same time, promote the timeliness and applicability of the monitoring system to the power grid frequency fluctuation caused by sudden rise of new energy output through emergency closing;

[0060] When the actuator 2 appears load shedding abnormality or needs to generate load shedding action control, the load control emergency recovery unit controls the upper and lower electromagnetic control blocks 32 to generate attractive electromagnetic action, which makes the elastic sleeve 31 produce elastic contraction deformation under the action of electromagnetic attractive force, and then drives the secondary execution moving piece 4 to move upward and actively move away from the main execution moving piece 21, so as to realize the separation of the main execution moving piece 21 and the execution fixed piece 22 without conduction, complete the compensation control of the load shedding action of the actuator 2, effectively cope with the load shedding abnormality of the actuator 2, so as to promote the effectiveness and accuracy of the DSP operation processing unit load shedding control, promote the stability of the power grid, or directly execute the load shedding action of the actuator 2, keep the load control instruction of the DSP operation processing unit unchanged, avoid feedback abnormality of subsequent data control, at the same time, promote the timeliness and applicability of the monitoring system to the power grid frequency fluctuation caused by sudden drop of new energy output through emergency load shedding;

[0061] And in the process of elastic sleeve 31 elastic elongation deformation, the upper and lower two corresponding elastic trigger strip 33 produce far away from the action, causing DSP operation processing unit through the compensation mechanism state feedback unit received elastic trigger strip 33 not triggered data, in the process of elastic sleeve 31 elastic contraction deformation, the upper and lower two corresponding elastic trigger strip 33 produce close action, continue to maintain its abutment effect, DSP operation processing unit through the compensation mechanism state feedback unit received the continuous trigger data of elastic trigger strip 33, and then in the subsequent load regulation process, DSP operation processing unit according to the state of the compensation conversion mechanism 3 at this time, to the load scheduling control unit and load control emergency recovery unit produces effective control instruction, so as to ensure the effectiveness and accuracy of load control, further ensure that the device body 1 and monitoring system according to the power grid frequency fluctuation on the accuracy and effectiveness of load control, effective position power grid stability.

[0062] The second embodiment:

[0063] Figure 1 - Figure 3 And Figure 10 The monitoring system of the low frequency load shedding device, the input end of the DSP operation processing unit is also connected with the closing data acquisition unit, the input end of the closing data acquisition unit is connected with the actuator 2 signal arranged in the device body 1, the setting of the closing data acquisition unit can further increase the diversity of the data collected by the monitoring system, and the load state data in the power grid is monitored in real time, so as to ensure the effectiveness and accuracy of subsequent load shedding or closing control.

[0064] Figure 10 The DSP operation processing unit comprises a collection data receiving module and a verification data receiving module, the input end of the collection data receiving module is respectively connected with the double sleeve redundant link data acquisition unit, the power grid parameter acquisition unit, the full weather data acquisition unit and the closing data acquisition unit, and the output end of the collection data receiving module is connected with a data rough processing module;

[0065] The input end of the verification data receiving module is respectively connected with the reserved re verification unit, the scheduling control feedback unit and the prediction scheduling emergency unit, and the output end of the verification data receiving module is connected with a verification data processing module;

[0066] The output end of the data rough processing module and the verification data processing module is respectively connected with a comprehensive optimization processing module, the comprehensive optimization processing module adopts an optimal selection algorithm, the output end of the comprehensive optimization processing module is connected with an optimized scheduling instruction transmission module, and the output end of the data rough processing module is also connected with the optimized scheduling instruction transmission module, and the instruction priority of the data rough processing module is lower than that of the comprehensive optimization processing module;

[0067] The output end of the optimization scheduling instruction transmission module is respectively connected with the load scheduling and control unit, the load control emergency recovery unit and the trend prediction unit in signal connection, a double processor mode is adopted to classify the collected data and feedback data, then the corresponding data is processed through the data rough processing module and the verification data processing module, and then the processed data is optimized through the comprehensive optimization processing module, so that the load level can be calculated in real time, the amount of load to be cut in each round can be obtained, the load loss can be reduced under the premise of ensuring the cutting, the operation rate of the DSP operation processing unit can be effectively improved, the effectiveness of the power grid stability protection can be promoted, and the accuracy of the load cutting can be ensured.

[0068] Figure 1 - Figure 3 and Figure 10 In the process of monitoring the system operation, the data acquisition and receiving module in the DSP operation processing unit collects and processes the data transmitted by the power grid parameter acquisition unit, the full weather data acquisition unit, the closing data acquisition unit and the double-redundancy link data acquisition unit, and then transmits the data to the data rough processing module, so that the data rough processing module executes the rough processing data of the load control according to the collected data of the power grid frequency fluctuation, and transquires the data to the comprehensive optimization processing module and the optimization scheduling instruction transmission module;

[0069] The verification data receiving module also collects and processes the data transmitted by the scheduling and control feedback unit, the reserved re-verification unit, the prediction scheduling emergency unit and the compensation mechanism state feedback unit, and then transquires the verification data to the verification data processing module, so that the verification data processing module selects and uses the data to form verification execution data, and then transquires the verification execution data to the comprehensive optimization processing module;

[0070] The comprehensive optimization processing module optimizes and selects the rough processing execution data according to the verification execution data, and then transquires the optimized execution data to the optimization control instruction transmission module. When the optimization control instruction transmission module receives the execution data transmitted by the data rough processing module and the comprehensive optimization processing module of the same level, it transquires the optimized execution data transmitted by the comprehensive optimization processing module, and when it only receives the data transmitted by the data rough processing module, it transquires the control data according to the rough processing execution data. The accuracy, optimality and effectiveness of the selected load control can be effectively guaranteed, and when the comprehensive optimization processing module runs slowly, the load can be coarsely controlled according to the execution data of the data rough processing module, the fluctuation of the power grid frequency can be reduced, the volatility of the power grid frequency can be reduced, then the processing time of the comprehensive optimization processing module is waited, the continuity and effectiveness of the power grid stability control are maintained, and the damage of the power grid is reduced.

[0071] And closing data acquisition module will be closing state and load shedding state data transmission to the data acquisition receiving module, then cause data rough processing module according to the state data of the actuator 2 in the previous level instruction, according to the change of monitoring data to the actuator 2 for subsequent control and keep, on the one hand, ensure the effectiveness and optimality of the data execution of load scheduling control unit, but also can effectively due to the data of the previous level instruction, cause the misoperation of load shedding control, ensure the effectiveness and accuracy of subsequent load shedding or closing control.

[0072] The third embodiment:

[0073] Figure 1 - Figure 3 、 Figure 11 and Figure 12 The monitoring system of the low frequency load shedding device is shown, the reserved verification unit includes a link comprehensive judgment module and a quality comprehensive judgment module, the output ends of the link comprehensive judgment module and the quality comprehensive judgment module are connected with a reserved verification processing module, and the output ends of the reserved verification processing module are connected with a data output module and an abnormal data output module;

[0074] The input end of the link comprehensive judgment module is connected with a link on-off state acquisition module and a link terminal state acquisition module, the input ends of the link on-off state acquisition module, the link terminal state acquisition module and the quality comprehensive judgment module are connected with a double redundant link data acquisition unit signal, the output ends of the data output module and the abnormal data output module are connected with a DSP operation processing unit signal, and the link comprehensive judgment module and the quality comprehensive judgment module are set. While promoting the selection of quality data acquisition and transmission and improving the accuracy and effectiveness of the collected data, the DSP operation processing unit can assist in comprehensively judging the load shedding scheme according to the link on-off state and the interruption state, improve the accuracy and optimality of the load control, and effectively ensure the safety and stability of the power grid.

[0075] Figure 11 and Figure 12 The double redundant link includes an A link and a B link connected with the device body 1 respectively, and the A link and the B link are arranged in parallel with the device body 1. The link on-off state acquisition module collects the on-off state data of the double redundant link through the double redundant link data acquisition unit. The on-off state data includes the on-off data of the A link, the on-off data of the B link and the common on-off data of the A link and the B link.

[0076] The link terminal state acquisition module collects the interruption state data of the double redundant link through the double redundant link data acquisition unit. The interruption state data includes A link interruption data, B link interruption data and common interruption data of the A link and the B link.

[0077] The quality comprehensive judgment module collects and judges the data quality of the two sets of redundant links through the dual sets of redundant link data collection units. The data quality includes the data quality of set A links and the data quality of set B links, and then assists the reserved verification processing module to judge the effectiveness of the data quality transmitted by the link comprehensive judgment module. The link investment and withdrawal status collection module, the link terminal status collection module and the quality comprehensive judgment module can effectively collect various data and data quality of the two sets of redundant links, effectively promote the accuracy and effectiveness of the collected data, and can also promote the efficiency of data processing and collection through item-by-item collection, and improve the effectiveness of the selection of collected data.

[0078] Figure 1 - Figure 3 、 Figure 11 and Figure 12 It is shown that after receiving the link insertion and withdrawal data and interruption data transmitted by the link insertion and withdrawal status acquisition module and the link terminal status acquisition module respectively, the link comprehensive judgment module comprehensively judges the status of the dual redundant links to ensure the effectiveness of data acquisition, and then transmits the comprehensive data to the reserved verification processing module. The quality comprehensive judgment module judges the quality of the data transmitted by the dual redundant links to ensure the accuracy of the data, and then transmits the quality data to the reserved verification processing module. The reserved verification processing module selects and distinguishes abnormalities of the data transmitted by the dual redundant links based on the comprehensive data and quality data, and transmits the access data to the access data output module and the abnormal data to the abnormal data output module. The access data output module and the abnormal data output module simultaneously transmit the data to the verification data receiving module. While transmitting accurate and effective data to the verification data receiving module, the collected data can also be pre-processed and classified, effectively improving the rate of data calculation and abnormality processing of the subsequent verification data processing module, promoting the applicability and timely response of the device body 1 and the monitoring system to power grid frequency fluctuations, and ensuring the stability and security of the power grid.

[0079] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A monitoring system for an underfrequency load shedding device, characterized in that: The invention comprises a device body (1), an actuator (2) arranged in the device body (1), a DSP operation processing unit carried in the device body (1), and a double set of redundant links connected to the device body (1), wherein the input end of the DSP operation processing unit is connected to the double set of redundant link data acquisition units, a dispatching and control feedback unit, a power grid parameter acquisition unit, a full meteorological data acquisition unit, and a reserved re-verification unit; The output end of the DSP operation processing unit is connected to the load scheduling and control unit, the trend prediction unit and the load control emergency recovery unit. The output end of the trend prediction unit is connected to the prediction and scheduling emergency unit. The input ends of the reservation re-verification unit and the scheduling and control feedback unit are both signal-connected to the dual sets of redundant link data acquisition units. The actuator (2) includes an actuator stator (22) fixedly arranged therein and a main actuator plate (21) rotatably arranged therein, and the main actuator plate (21) cooperates with the actuator stator (22). A compensation conversion mechanism (3) is fixedly arranged at the lower end of the actuator stator (22), and a secondary actuator plate (4) is fixedly connected to the lower end of the compensation conversion mechanism (3) and cooperates with the main actuator plate (21) and the actuator stator (22) respectively. The input end of the dual redundant link data acquisition unit is connected to the dual redundant link signal, the input end of the power grid parameter acquisition unit and the full meteorological data acquisition unit are both connected to the monitoring center signal, the output end of the load dispatching and control unit is connected to the execution mechanism (2) signal, the output end of the prediction and dispatching emergency unit is respectively connected to the DSP operation processing unit and the load dispatching and control unit signal, and the output end of the load control emergency recovery unit is connected to the compensation conversion mechanism (3) signal; The compensation conversion mechanism (3) comprises an elastic sleeve (31) fixedly connected to the lower end of the executive stator (22); the lower end of the elastic sleeve (31) is fixedly connected to the secondary executive stator (4); the upper end of the secondary executive stator (4) is fixedly connected to a plurality of connecting wires (41); the lower ends of the connecting wires (41) pass through the elastic sleeve (31) and are fixedly connected to the executive stator (22); the upper and lower inner walls of the elastic sleeve (31) are fixedly connected to the electromagnetic control block (32); and the output end of the load control emergency recovery unit is signal-connected to the electromagnetic control block (32).

2. The monitoring system for an under-frequency load shedding device according to claim 1, characterized in that: The electromagnetic control blocks (32) at two corresponding upper and lower positions are fixedly connected to an elastic trigger bar (33) at one end thereof, and the input end of the DSP operation processing unit is also connected to a compensation mechanism state feedback unit, and the input end of the compensation mechanism state feedback unit is signal-connected to the elastic trigger bar (33).

3. The monitoring system for an under-frequency load shedding device according to claim 1, characterized in that: The input end of the DSP operation processing unit is also connected to a closing data acquisition unit, and the input end of the closing data acquisition unit is connected to a signal of an actuator (2) provided in the device body (1).

4. The monitoring system for an under-frequency load shedding device according to claim 3, characterized in that: The DSP operation processing unit includes a data acquisition receiving module and a verification data receiving module. The input end of the data acquisition receiving module is respectively connected to the dual redundant link data acquisition unit, the power grid parameter acquisition unit, the full meteorological data acquisition unit and the closing data acquisition unit. The output end of the data acquisition receiving module is connected to the data coarse processing module; The input end of the verification data receiving module is respectively connected to the reservation re-verification unit, the scheduling control feedback unit and the prediction scheduling emergency unit signal, and the output end of the verification data receiving module is connected to the verification data processing module; The output ends of the data coarse processing module and the verification data processing module are both signal-connected to the comprehensive optimization processing module, the output end of the comprehensive optimization processing module is connected to the optimization scheduling instruction transmission module, and the output end of the data coarse processing module is also signal-connected to the optimization scheduling instruction transmission module, and the instruction priority of the data coarse processing module is lower than the instruction priority of the comprehensive optimization processing module; The output end of the optimization scheduling instruction transmission module is respectively connected to the load scheduling control unit, the load control emergency recovery unit and the trend prediction unit by signal.

5. The monitoring system for an under-frequency load shedding device according to claim 1, characterized in that: The reservation re-verification unit includes a link comprehensive judgment module and a quality comprehensive judgment module, the output ends of the link comprehensive judgment module and the quality comprehensive judgment module are connected to the reservation verification processing module, and the output end of the reservation verification processing module is connected to the access data output module and the abnormal data output module; The input end of the link comprehensive judgment module is connected to the link launch and withdrawal status collection module and the link terminal status collection module. The input ends of the link launch and withdrawal status collection module, the link final status collection module and the quality comprehensive judgment module are all signal-connected to the dual sets of redundant link data collection units. The output ends of the access data output module and the abnormal data output module are both signal-connected to the DSP operation processing unit.

6. The monitoring system for an under-frequency load shedding device according to claim 5, characterized in that: The dual redundant links include an A set of links and a B set of links respectively connected to the device body (1) by signal. The link launch / withdrawal status acquisition module acquires launch / withdrawal status data of the dual redundant links through the dual redundant link data acquisition unit. The launch / withdrawal status data includes launch / withdrawal data of the A set of links, launch / withdrawal data of the B set of links, and launch / withdrawal data of both the A set of links and the B set of links. The link terminal status acquisition module collects the interruption status data of the dual redundant links through the dual redundant link data acquisition unit, and the interruption status data includes the interruption data of the link set A, the interruption data of the link set B, and the common interruption data of the link set A and the link set B; The quality comprehensive judgment module collects and judges the data quality of the two sets of redundant links through the dual sets of redundant link data collection units. The data quality includes the data quality of set A links and the data quality of set B links, and then assists the reserved verification processing module to judge the validity of the data quality transmitted by the link comprehensive judgment module.

7. The monitoring system for an under-frequency load shedding device according to claim 1, characterized in that: The output end of the DSP operation processing unit is also connected to a data display unit, and the output end of the data display unit is connected to a display and a display lamp bead signal arranged at the left end of the device body (1).

8. The monitoring system for an under-frequency load shedding device according to claim 1, characterized in that: The device body (1) is connected to dual sets of redundant links and monitoring center signals via a remote motor communication channel, and the remote motor communication channel adopts the IEC104 protocol.

Images