Intelligent alarm method and system based on spare power automatic switching analysis of power system

A power system and intelligent alarm technology, applied in the direction of power network operating system integration, information technology support system, electrical components, etc., can solve problems such as too long time, unable to determine the action of standby and automatic switching, and high level requirements for operation and maintenance personnel, and achieve Shorten the recovery time, facilitate the processing of faults and restore power supply in time, and reduce the effect of relying on experience

Active Publication Date: 2020-11-20

NARI TECH CO LTD +2

3 Cites 1 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0009] (1) It can only truthfully reflect the fault information sent by the substation, and it is impossible to determine whether the standby automatic switching action is correct according to the set action logic. longer

[0010] (2) It is impossible to determine whether the standby automatic switch is malfunctioning, whether it is caused by human or equipment damage or is caused by a fault outside the protection range. The existing method requires operation and maintenance personnel to go to the sub- Confirmation at the station side, on the one hand, the time is too long, on the other hand, the ...

Method used

The present invention carries out integrated analysis by monitoring signal diagnosis and analysis module and can automatically determine whether the action of self-switching is correct according to the set action logic, and can provide diagnostic reference to monitoring personnel, so as to facilitate the recovery of power supply in time for processing failures; through electrical quantity analysis Diagnosis can determine whether the backup self-switching is malfunctioning or refusing to operate. It can determine whether the backup self-switching is caused...

Abstract

The invention discloses an intelligent alarm method and system based on spare power automatic switching analysis of a power system. The method comprises the steps: determining preset action logic of spare power automatic switching under each fault event according to collected electrical quantity information and a predetermined spare power automatic switching model; according to the collected monitoring information and the predetermined spare power automatic switching model, judging a current action state of spare power automatic switching under each fault event; and obtaining final spare powerautomatic switching action information corresponding to each fault event by integrating the preset action logic of the spare power automatic switching and the current action state obtained by judgment. The method can be used to determine whether the spare power automatic switching is the spare power automatic switching maloperation caused by people or equipment damage or a correct action caused by an actual fault of a main power supply fault, does not need operation and maintenance personnel to go to a substation end for confirmation, can reduce dependence on the experience of the field personnel through judgment, and can greatly shorten the mode recovery time.

Application Domain

Power network operation systems integrationEmergency protective circuit arrangements +2

Technology Topic

Real-time computingSystems engineering +3

Image

Examples

Experimental program(4)

Example Embodiment

[0053] EXAMPLIC The following steps (eg, figure 2 The desired electrical amount information and predetermined self-input model determines that the preset action logic of each fault event should be active or should not be moved; according to the acquired monitoring information and predetermined The current operating state of the self-investment model is determined by the auto-affected event is correct, the action failed or incorrect action; the preset action logic and judgment of the combined self-programs and the current action state of the judgment are determined to be properly active. , Malfunctional or refuse to obtain the final preparation from the final ready-to-auto operation information corresponding to each fault event.

[0054] The acquired electrical amount information collected in this embodiment includes a total mesh bus voltage and a zero-sequence voltage, a current value of the main power supply associated with each busbar, and the main power supply protection action information and remote operation information, and the position of the circuit breaker. . The acquisition of monitoring information includes a self-action protection signal and an auto-related gate signal. It should be noted that the collection of electrical amount information and monitoring information is implemented in this application, and this application is not described in detail.

[0055] The self-investment model in the present invention is these is the factory station is transported, and the power supply company is configured, which is a common sense known to those skilled in the art. The self-investment model is mainly some of the configuration information that records the factory-standing equipment, including factory stations, self-cast names, associated equipment (main power supply, backup power, mode switch, action switch).

[0056] like image 3 As shown, in this embodiment, the preset action logic of the preset action logic of the preset operation logic of each fault event is determined by the predetermined electrical amount information and the predetermined auto-input model is to operate or should not operate.

[0057] (1) Monitor the full network bus voltage in real time, when the bus voltage is lowered to the set threshold (30% of the set threshold set to the phase voltage below the rated line voltage) or the zero sequence voltage is increased to the set threshold (When the set threshold is set to the secondary zero sequence voltage above 30V), the bus bar is filtered, and the induction model library is selected. If the matching does not match the auto-shoot configuration, it should not be available from the operation. .

[0058] (2) If the abstore bus is matched to the self-investment model, the current value of the main power supply is obtained according to the corresponding main power supply, and if the current value is higher than the normal load, the current value of the power supply is higher. Then it is determined as a PT secondary disconnection, and there should be no self-investment at this time. Bus stop refers to the fact that the bus voltage is zero due to the failure in the power system, and the bus stop is a major power production accident, which will cause a series of consequences.

[0059] (3) Get the main power supply protection action information, and the protective action information of the busbar connected to the main power supply. If the primary power supply is mainly changed, the lock is closed when the reserve protection action information is obtained. Investing, when the main wire protection operation is connected to the power supply, it should be closed, and when the main power supply is active, the actual position of the corresponding circuit breaker is obtained. When the circuit breaker is not jumped, it should be closed and standby. No action.

[0060] (4) Get the remote control information table. If the remote control of the corresponding switch is accompanied when the bus voltage is lowered, it should be self-investive, and it should not operate.

[0061] like Figure 4 As shown, the present embodiment determines the current operating state of each fault event, the current operation state of each fault event, the failure or incorrect operation of each fault event, the following steps:

[0062] (1) Judging whether or not the fault event first set time (the embodiment is set to 20s) exist that self-action protection signals, if there is no self-output signal, no correspondence is available.

[0063] (2) If a self-cast operation signal is provided, it is determined whether or not the second setting time of this signal (the embodiment is set to 5s), and if there is no corresponding switch gate, it is prepared. Failure.

[0064] (3) If there is a corresponding switch gate and match the matching preparation model, it is prepared from the correct action.

[0065] (4) If there is a corresponding switch gate but does not match the matching preparation model, it is not properly operated.

[0066] In this embodiment, according to the above determination result, it is determined that the self-output is the correct action, and the specific method of malfunction or a refusal (as shown in Table 1):

[0067] Determine the preset action logic of the collected electrical amount information is the case where the preset action logic should be actuated:

[0068] If it is determined according to the acquisition of the monitoring information to be correct, it is presupply to the correct action;

[0069] If it is determined according to the acquisition of the monitoring information, it is ignited to the incorrect action;

[0070] If it is determined according to the acquisition of monitoring information, it is self-investigated as a refusal;

[0071] The preset action logic of the collected electrical amount information is determined by the preset action logic should not operate:

[0072] If it is determined according to the acquisition of the monitoring information to be correct, it is misconducted;

[0073] If it is determined according to the acquisition of the monitoring information, it is ignited to the incorrect action;

[0074] If it is determined according to the acquisition of the monitoring information, it is miscondurated to be missed.

[0075] Table 1 Integrated determination logic

[0076]

Example Embodiment

[0077] Embodiment 2 Based on the example one, the intelligent alarm method of the power system preparation-based analysis provided in this embodiment also includes: displaying the final preparation self-exploising information corresponding to each fault event (eg Figure 5 The specifically includes:

[0078] 1 Visualization method realizes a fault briefing interface, and the fault briefing interface is a click to see the failure to see the failure.

[0079] 2 Prepare the operation information interface support information export and historical self-investment record query;

[0080] 3 Historical query interface support information exports and exports in time cycle, voltage grade query and export.

[0081] The present invention can automatically determine whether or not the active operation is properly operated according to the set action logic, which can provide a diagnostic reference to the monitor personnel, easy to resume power in time; by electrical amount analysis It is necessary to make a self-investment or self-virginity caused by human or equipment damage or due to the correct action caused by human or equipment damage or due to the actual failure of the main power supply. It is determined that it can reduce the dependence of the experience of the scene, which can greatly reduce the way of recovery time; provide the main station side back to the accident analysis, so that the analysis is no longer fully dependent on the judgment of the sub-station operation and maintenance personnel, can be an accident Provide a basis for recalling and accidental recovery.

Example Embodiment

[0082] Embodiment 3, corresponding to the example, this embodiment provides an intelligent alarm system based on power system, including: electrical amount analysis diagnostic module, monitoring information analysis diagnosis and synthesis module,

[0083] The electrical amount analysis diagnostic module is used to determine the preset action logic of each fault event according to the collected electrical amount information and the predetermined auto-output model;

[0084] The monitoring information analysis diagnosis is used to determine the current action state of each fault event in accordance with the acquired monitoring information and the predetermined auto-output model. The current operation state of each fault event is correct, the action failed or incorrect operation;

[0085] The integrated determination module is used to combine the preset action logic and judgment obtaining the current operation status of each fault event to obtain the final standby auto-action information corresponding to each fault event.

[0086] The electrical amount analysis diagnostic module also includes a voltage mutation monitoring module, a self-voter matching module, a main supply current monitoring module, a main power supply protection action monitoring module; the monitoring information analysis diagnosis includes self-investment protection action monitoring module , Prepare from the vision of the moving monitoring module, which is self-cast logic matching module.

[0087] The implementation method of each module in this embodiment corresponds to one of the above embodiments. By this embodiment, the problem solved by the present invention is to determine whether or not the self-investment is determined by the calculation and analysis of the calculation of the electrical amount and combined with the monitoring system signal analysis. Provide a fault judgment support for the regulatory person to quickly restore the power network operation, and reduce the risk of operating the grid.

PUM

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Less reliance on experience
shorten recovery time

Intelligent alarm method and system based on spare power automatic switching analysis of power system

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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