CN115483698A - System and method for evaluating operation stability of alternating current-direct current hybrid power distribution network - Google Patents
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Abstract
The invention discloses an operation stability evaluation system and method for an alternating current-direct current hybrid power distribution network, relates to the technical field of stability evaluation, and solves the technical problem that the stability cannot be accurately analyzed in the operation process of the power distribution network in the prior art so that the operation efficiency of the power distribution network is low; the stability analysis of the power distribution network is carried out, whether the operation process of the power distribution network is stable or not is judged, the operation efficiency of the power distribution network is improved, meanwhile, the operation state of the power distribution network is detected in real time through the stability analysis of the power distribution network, the operation monitoring force is favorably improved, the rectification can be carried out in time when the operation is unstable, and the influence caused by the operation fluctuation of the power distribution network is reduced; the initial operation of the power distribution network is detected, and the stage that the operation of the power distribution network is unstable is judged, so that whether the stability influence factors are external influence or self internal influence can be accurately analyzed, the accuracy of stability maintenance can be improved, and the operation efficiency of the power distribution network is improved.
Description
Technical Field
The invention relates to the technical field of stability assessment, in particular to an operation stability assessment system and method for an alternating current-direct current hybrid power distribution network.
Background
The alternating current-direct current hybrid power distribution network refers to a power distribution network formed by mixing alternating current and direct current, the alternating current-direct current hybrid power distribution network is a development trend of a future power distribution network when the alternating current power distribution network is built, and new influences on energy efficiency can be generated due to the introduction of new devices such as a distributed power supply and an energy storage device in the direct current power distribution network; in recent years, with the continuous progress of social modernization, the demand of people on electric quantity is increased day by day, the power grid develops towards ultrahigh voltage and large capacity, the requirements of people on the safety and reliability of power utilization are higher and higher, and a power enterprise is vital to the operation and maintenance of equipment of an alternating current-direct current hybrid power distribution network;
however, in the prior art, the stability cannot be accurately analyzed in the operation process of the power distribution network, so that the operation efficiency of the power distribution network is low, and meanwhile, the reason for the abnormal stability of the power distribution network cannot be accurately analyzed according to the operation analysis of the power distribution network when the stability is unqualified, so that the accuracy of stability maintenance is reduced;
in view of the above technical drawbacks, a solution is proposed.
Disclosure of Invention
The invention aims to solve the problems and provides a system and a method for evaluating the running stability of an alternating current-direct current hybrid power distribution network, which are used for analyzing the stability of the power distribution network, judging whether the running process of the power distribution network is stable or not, improving the running efficiency of the power distribution network, detecting the running state of the power distribution network in real time through the stability analysis of the power distribution network, being beneficial to improving the running monitoring strength, being capable of performing rectification in time when the running is unstable and reducing the influence caused by running fluctuation of the power distribution network; the initial operation of the power distribution network is detected, and the stage that the operation of the power distribution network is unstable is judged, so that whether the stability influence factors are external influence or self internal influence can be accurately analyzed, the accuracy of stability maintenance can be improved, and the operation efficiency of the power distribution network is improved.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides an alternating current-direct current hybrid power distribution network operation stability evaluation system, includes the server, and server communication connection has:
the power distribution network stability analysis unit is used for analyzing the stability of the power distribution network, judging whether the running process of the power distribution network is stable or not, acquiring a stability analysis coefficient of the power distribution network in an execution time period through analysis, comparing the stability analysis coefficient of the power distribution network to generate a stability analysis qualified signal and a stability analysis unqualified signal, and sending the stability analysis qualified signal and the stability analysis unqualified signal to the server;
the static operation detection unit is used for detecting the initial operation of the power distribution network, marking the execution speed of the power distribution task in the corresponding operation expectation of the power distribution network as a power distribution task execution speed threshold, marking the time period when the execution speed of the power distribution task at the operation starting moment is increased to the execution speed threshold of the power distribution task as a static operation time period when the power distribution network starts to operate, marking the operation state of the power distribution network in the static operation time period as static operation, generating a static detection unqualified signal and a static detection qualified signal through static operation analysis, and sending the signals to the server;
the fault influence detection unit is used for analyzing the operation faults of the power distribution network after the power distribution network finishes static operation, dividing the operation faults into high-influence faults and low-influence faults through analysis and sending the high-influence faults and the low-influence faults to the server;
the risk control efficiency detection unit is used for carrying out efficiency detection on fault risk control in the operation process of the power distribution network, analyzing the operation parameters of the power distribution network when the operation fault of the power distribution network occurs, and marking the corresponding operation parameters as the influence parameters of the operation fault if the floating frequency of the operation parameters of the power distribution network exceeds a floating frequency threshold value when the operation fault of the power distribution network occurs; and acquiring a risk control efficiency detection coefficient in the operation process of the power distribution network through analysis, comparing the risk control efficiency detection coefficient to generate a risk control efficiency detection unqualified signal and a risk control efficiency detection qualified signal, and sending the risk control efficiency detection unqualified signal and the risk control efficiency detection qualified signal to a server.
As a preferred embodiment of the present invention, the operation process of the power distribution network stability analysis unit is as follows:
acquiring an operation time period of the power distribution network, marking the operation time period as an execution time period, constructing an operation expectation of the power distribution network according to the task amount of the power distribution network in the execution time period, and acquiring the frequency which is not met by the operation expectation of the power distribution network in the execution time period and the reduction amount of the operation expected yield when the operation expectation is not met; acquiring the probability that the operation is expected to be completed within the set time within the execution time period; acquiring a stability analysis coefficient of the power distribution network in an execution time period through analysis; comparing the stability analysis coefficient of the power distribution network in the execution time period with a stability analysis coefficient threshold value:
if the stability analysis coefficient of the power distribution network in the execution time period exceeds the stability analysis coefficient threshold value, judging that the stability analysis of the power distribution network in the execution time period is qualified, generating a stability analysis qualified signal and sending the stability analysis qualified signal to a server; and if the stability analysis coefficient of the power distribution network in the execution time period does not exceed the stability analysis coefficient threshold value, judging that the stability analysis of the power distribution network in the execution time period is unqualified, generating a unqualified stability analysis signal and sending the unqualified stability analysis signal to a server.
As a preferred embodiment of the present invention, the operation process of the static operation detection unit is as follows:
the method comprises the following steps of collecting distribution fault occurrence frequency and distribution fault occurrence rear controllable probability in the distribution network static operation process, and comparing the distribution fault occurrence frequency with a fault occurrence frequency threshold and a controllable probability threshold respectively:
if the distribution fault occurrence frequency exceeds a fault occurrence frequency threshold value in the static operation process of the distribution network or the controllable probability exceeds a controllable probability threshold value after the distribution fault occurs, generating a static detection unqualified signal and sending the static detection unqualified signal to a server; and if the distribution fault occurrence frequency does not exceed the fault occurrence frequency threshold value in the static operation process of the distribution network and the controllable probability does not exceed the controllable probability threshold value after the distribution fault occurs, generating a static detection qualified signal and sending the static detection qualified signal to the server.
As a preferred embodiment of the present invention, the operation process of the fault influence detection unit is as follows:
the frequency which can be automatically recovered after the operation fault occurs in the operation process of the power distribution network and the probability of continuous occurrence after the corresponding type operation fault is maintained are collected and respectively compared with an automatic recovery frequency threshold value and a continuous occurrence probability threshold value:
if the frequency capable of automatically recovering after the operation fault occurs in the operation process of the power distribution network does not exceed the automatic recovery frequency threshold value, or the probability of continuous occurrence after the maintenance of the corresponding type of operation fault exceeds the continuous occurrence probability threshold value, marking the corresponding operation fault as a high-influence fault, and correspondingly sending the high-influence fault type to a server;
if the frequency capable of automatically recovering after the operation fault occurs in the operation process of the power distribution network exceeds the automatic recovery frequency threshold value and the probability of continuous occurrence after the maintenance of the corresponding type of operation fault does not exceed the continuous occurrence probability threshold value, marking the corresponding operation fault as a low-influence fault and correspondingly sending the type of the low-influence fault to the server.
As a preferred embodiment of the present invention, the operation process of the risk control efficiency detection unit is as follows:
acquiring the interval duration of the influence parameter floating time and the control time in the operation process of the power distribution network and the reduction of the floating speed after the influence parameter control floating, and respectively marking the interval duration of the influence parameter floating time and the control time in the operation process of the power distribution network and the reduction of the floating speed after the influence parameter control floating as JG and JD; acquiring the probability in the range of the influence parameter numerical control threshold in the operation process of the power distribution network, and marking the probability in the range of the influence parameter numerical control threshold in the operation process of the power distribution network as GL;
by the formula
Acquiring a risk control efficiency detection coefficient C in the operation process of the power distribution network, wherein s1, s2 and s3 are preset proportionality coefficients, s1 is greater than s2 and greater than s3 and greater than 0, beta is a fault influence coefficient, and when the operation fault type is a high-influence fault type, the value of beta is 0.8; when the operation fault type is the low-influence fault type, the value of beta is 1.05;
comparing a risk control efficiency detection coefficient C with a risk control efficiency detection coefficient threshold value in the operation process of the power distribution network:
if the risk control efficiency detection coefficient C in the operation process of the power distribution network exceeds the risk control efficiency detection coefficient threshold, judging that the risk control efficiency detection in the operation process of the power distribution network is qualified, generating a risk control efficiency detection qualified signal and sending the risk control efficiency detection qualified signal to a server;
and if the risk control efficiency detection coefficient C in the operation process of the power distribution network does not exceed the risk control efficiency detection coefficient threshold, determining that the risk control efficiency detection in the operation process of the power distribution network is unqualified, generating a risk control efficiency detection unqualified signal and sending the risk control efficiency detection unqualified signal to the server.
The method for evaluating the running stability of the alternating current-direct current hybrid power distribution network comprises the following specific steps of:
the method comprises the following steps of firstly, analyzing the stability of the power distribution network, judging whether the operation process of the power distribution network is stable or not, acquiring a stability analysis coefficient of the power distribution network in an execution time period through analysis, and comparing and judging whether the stability of the power distribution network is qualified or not according to the stability analysis coefficient of the power distribution network;
when the stability of the power distribution network is unqualified, detecting the initial operation of the power distribution network, marking the execution speed of the power distribution task in the corresponding operation expectation of the power distribution network as a power distribution task execution speed threshold, marking the time period when the execution speed of the power distribution task at the operation starting moment is increased to the power distribution task execution speed threshold as a static operation time period when the power distribution network starts to operate, marking the operation state of the power distribution network in the static operation time period as static operation, and judging whether the static detection of the power distribution network is qualified or not through static operation analysis;
step three, analyzing the operation faults of the power distribution network after the static detection of the power distribution network is qualified, and dividing the operation faults into high-influence faults and low-influence faults through analysis;
and fourthly, carrying out efficiency detection on the risk control of different fault types in the operation process of the power distribution network, analyzing the operation parameters of the power distribution network when the operation faults of the power distribution network occur, acquiring a risk control efficiency detection coefficient in the operation process of the power distribution network through analysis, and comparing whether the risk control efficiency is normal or not according to the risk control efficiency detection coefficient.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the method, the stability of the alternating current-direct current hybrid power distribution network is analyzed in a targeted manner, whether the operation process of the power distribution network is stable or not is judged, the operation efficiency of the power distribution network is improved, meanwhile, the operation state of the power distribution network is detected in real time through the stability analysis of the power distribution network, the operation monitoring force is improved, the rectification can be performed in time when the operation is unstable, and the influence caused by the operation fluctuation of the power distribution network is reduced; the initial operation of the power distribution network is detected, and the stage of unstable operation of the power distribution network is judged, so that whether the stability influence factor is external influence or self internal influence can be accurately analyzed, the accuracy of stability maintenance can be improved, and the operation efficiency of the power distribution network is improved;
2. in the invention, the influence of the power distribution fault in the operation process of the power distribution network is analyzed, and whether the influence of the operation fault of the power distribution network is controllable or not is judged, so that accurate and proper fault maintenance is implemented aiming at the operation fault type, the maintenance stability of the operation fault is ensured, and the influence caused by the operation fault is reduced to the maximum extent; carry out efficiency detection with distribution network operation in-process trouble risk control, judge whether the distribution network operation has the control efficiency when the trouble risk qualified, detect the trouble risk control of distribution network, improve the efficiency of distribution network trouble management and control, reduce the trouble incidence of distribution network.
Drawings
In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic block diagram of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The traditional alternating current power distribution system faces a series of problems of high line loss, power quality disturbance, voltage drop and the like, and is difficult to meet the increasing power requirements of power users. Compared with an alternating-current power distribution network, the direct-current power supply can effectively solve the problems of harmonic waves, unbalanced three phases and other electric energy quality, has obvious advantages in the aspect of improving the power supply quality, but cannot completely replace the alternating-current power distribution network in a short time. Therefore, the alternating current and direct current hybrid power distribution network is a development trend of the future power distribution network on the basis of the alternating current power distribution network. However, the introduction of new devices such as a distributed power supply and an energy storage device in the direct-current power distribution network also has new influence on the energy efficiency; in this application, the distribution network corresponds promptly and indicates to be the mixed distribution network of alternating current-direct current in the technical scheme.
Referring to fig. 1, an ac/dc hybrid power distribution network operation stability evaluation system includes a server, the server is in communication connection with a power distribution network stability analysis unit, a static operation detection unit, a fault influence detection unit and a risk control efficiency detection unit, wherein the server is in bidirectional communication connection with the power distribution network stability analysis unit, the static operation detection unit, the fault influence detection unit and the risk control efficiency detection unit;
the server generates a power distribution network stability analysis signal and sends the power distribution network stability analysis signal to the power distribution network stability analysis unit, the power distribution network stability analysis unit performs stability analysis on the power distribution network after receiving the power distribution network stability analysis signal, and whether the operation process of the power distribution network is stable or not is judged, so that the operation efficiency of the power distribution network is improved, meanwhile, the operation state of the power distribution network is detected in real time through the stability analysis of the power distribution network, the operation monitoring force is favorably improved, the rectification can be performed in time when the operation is unstable, and the influence caused by the operation fluctuation of the power distribution network is reduced;
acquiring an operation time period of the power distribution network, marking the operation time period as an execution time period, constructing an operation expectation of the power distribution network according to a power distribution network task amount of the execution time period, wherein the power distribution network task amount is represented as a distribution amount, an operation duration and other task amounts, acquiring a frequency which is not met by the operation expectation of the power distribution network in the execution time period and a reduction amount of the operation expected income when the operation expectation is not met, and respectively marking the frequency which is not met by the operation expectation of the power distribution network in the execution time period and the reduction amount of the operation expected income when the operation expectation is not met as WPL and JDL; acquiring the probability that the operation is expected to be completed within the set time within the execution time period, and marking the probability that the operation is expected to be completed within the set time within the execution time period as WGL;
by the formula
Acquiring a stability analysis coefficient X of the power distribution network in an execution time period, wherein a1, a2 and a3 are all preset proportionality coefficients, a1 is greater than a2 and greater than a3, and alpha isThe value of the error correction factor is 0.986;
comparing the stability analysis coefficient X of the power distribution network in the execution time period with a stability analysis coefficient threshold value:
if the stability analysis coefficient X of the power distribution network in the execution time period exceeds the stability analysis coefficient threshold, judging that the stability analysis of the power distribution network in the execution time period is qualified, generating a stability analysis qualified signal and sending the stability analysis qualified signal to a server; if the stability analysis coefficient X of the power distribution network in the execution time period does not exceed the stability analysis coefficient threshold, judging that the stability analysis of the power distribution network in the execution time period is unqualified, generating a unqualified stability analysis signal and sending the unqualified stability analysis signal to a server;
after the server receives the stability analysis qualified signal, marking the current execution time period as a stable time period, and performing statistical storage on the operation expectation of the power distribution network and the execution flow of the operation expectation in the stable time period;
after receiving the unqualified stability analysis signal, the server generates a static operation detection signal and sends the static operation detection signal to the static operation detection unit, and after receiving the static operation detection signal, the static operation detection unit detects the initial operation of the power distribution network and judges the stage of unstable operation of the power distribution network, so that the stability influence factor can be accurately analyzed to be external influence or self internal influence, the accuracy of stability maintenance can be improved, and the operation efficiency of the power distribution network can be improved;
when the power distribution network starts to operate, a time period when the execution speed of the power distribution task at the operation starting moment is increased to the execution speed threshold of the power distribution task is marked as a static operation time period, and the operation state of the power distribution network in the static operation time period is marked as static operation;
gather distribution network static operation in-process distribution fault frequency of occurrence and distribution fault controllable probability after appearing to with distribution network static operation in-process distribution fault frequency of occurrence and distribution fault controllable probability after appearing compare with fault frequency of occurrence threshold value and controllable probability threshold value respectively: the power distribution fault is expressed as a fault which influences the power distribution efficiency in the operation process of the power distribution network;
if the distribution fault occurrence frequency exceeds the fault occurrence frequency threshold value in the distribution network static operation process or the controllable probability exceeds the controllable probability threshold value after the distribution fault occurs, judging that the distribution network static detection is unqualified, generating a static detection unqualified signal and sending the static detection unqualified signal to a server; after receiving the unqualified static detection signal, the server maintains and monitors the execution equipment corresponding to the current operation expectation of the power distribution network;
if the distribution fault occurrence frequency does not exceed the fault occurrence frequency threshold value in the static operation process of the distribution network and the controllable probability does not exceed the controllable probability threshold value after the distribution fault occurs, judging that the static detection of the distribution network is qualified, generating a qualified static detection signal and sending the qualified static detection signal to a server;
after the server receives the static detection qualified signal, a fault influence detection signal is generated and sent to a fault influence detection unit, and after the fault influence detection unit receives the fault influence detection signal, the fault influence detection unit analyzes the influence of the power distribution fault in the operation process of the power distribution network so as to judge whether the influence of the operation fault of the power distribution network is controllable or not, so that accurate and proper fault maintenance is implemented aiming at the operation fault type, the maintenance stability of the operation fault is ensured, and the influence caused by the operation fault is reduced to the maximum extent;
after the distribution network finishes static operation, the operation faults of the distribution network are analyzed, the frequency capable of automatically recovering after the operation faults appear in the distribution network operation process and the probability of continuous occurrence after the corresponding type operation faults are maintained are collected, and the frequency capable of automatically recovering after the operation faults appear in the distribution network operation process and the probability of continuous occurrence after the corresponding type operation faults are maintained are respectively compared with an automatic recovery frequency threshold value and a continuous occurrence probability threshold value: the automatic recovery means that after the operation fault occurs, the manual maintenance is not carried out, and the automatic recovery of the operation regulation of the equipment is carried out;
if the frequency capable of automatically recovering after the operation fault occurs in the operation process of the power distribution network does not exceed the automatic recovery frequency threshold value, or the probability of continuous occurrence after maintenance of the corresponding type of operation fault exceeds the continuous occurrence probability threshold value, judging that the fault influence in the operation process of the power distribution network is high, marking the corresponding operation fault as a high-influence fault, and correspondingly sending the high-influence fault type to a server;
if the frequency capable of automatically recovering after the operation fault occurs in the operation process of the power distribution network exceeds the automatic recovery frequency threshold value and the probability of continuous occurrence after the maintenance of the corresponding type of operation fault does not exceed the continuous occurrence probability threshold value, judging that the fault influence in the operation process of the power distribution network is low, marking the corresponding operation fault as a low-influence fault, and correspondingly sending the low-influence fault type to a server;
the server generates a risk control efficiency detection signal and sends the risk control efficiency detection signal to a risk control efficiency detection unit, and the risk control efficiency detection unit detects the efficiency of fault risk control in the operation process of the power distribution network after receiving the risk control efficiency detection signal and judges whether the control efficiency is qualified or not when the fault risk exists in the operation of the power distribution network, so that the fault risk control of the power distribution network is detected, the efficiency of fault management and control of the power distribution network is improved, and the fault occurrence rate of the power distribution network is reduced;
analyzing the operation parameters of the power distribution network when the operation fault of the power distribution network occurs, wherein the operation parameters of the power distribution network are represented as operation data of the power distribution network, such as time length, voltage, temperature and other parameters; if the floating frequency of the operation parameters of the power distribution network exceeds the floating frequency threshold when the operation faults of the power distribution network occur, marking the corresponding operation parameters as the influence parameters of the operation faults;
acquiring the interval duration of the influence parameter floating time and the control time in the operation process of the power distribution network and the reduction of the floating speed after the influence parameter control floating, and respectively marking the interval duration of the influence parameter floating time and the control time in the operation process of the power distribution network and the reduction of the floating speed after the influence parameter control floating as JG and JD; acquiring the probability in the range of the influence parameter numerical control threshold in the operation process of the power distribution network, and marking the probability in the range of the influence parameter numerical control threshold in the operation process of the power distribution network as GL;
by the formula
Acquiring a risk control efficiency detection coefficient C in the operation process of the power distribution network, wherein s1, s2 and s3 are preset proportionality coefficients, s1 is greater than s2 and greater than s3 and greater than 0, beta is a fault influence coefficient, and when the operation fault type is a high-influence fault type, the value of beta is 0.8; when the operation fault type is the low-influence fault type, the value of beta is 1.05;
comparing a risk control efficiency detection coefficient C with a risk control efficiency detection coefficient threshold value in the operation process of the power distribution network:
if the risk control efficiency detection coefficient C in the operation process of the power distribution network exceeds the risk control efficiency detection coefficient threshold, judging that the risk control efficiency detection in the operation process of the power distribution network is qualified, generating a risk control efficiency detection qualified signal and sending the risk control efficiency detection qualified signal to a server;
if the risk control efficiency detection coefficient C in the operation process of the power distribution network does not exceed the risk control efficiency detection coefficient threshold, determining that the risk control efficiency detection in the operation process of the power distribution network is unqualified, generating a risk control efficiency detection unqualified signal and sending the risk control efficiency detection unqualified signal to a server, after receiving the risk control efficiency detection unqualified signal, the server completes the risk control in the operation process of the power distribution network, controls the risk control reaction duration and improves the control speed.
An AC-DC hybrid power distribution network operation stability assessment method comprises the following specific stability assessment method processes:
the method comprises the following steps of firstly, analyzing the stability of the power distribution network, judging whether the operation process of the power distribution network is stable or not, acquiring a stability analysis coefficient of the power distribution network in an execution time period through analysis, and comparing and judging whether the stability of the power distribution network is qualified or not according to the stability analysis coefficient of the power distribution network;
when the stability of the power distribution network is unqualified, detecting the initial operation of the power distribution network, marking the execution speed of the power distribution task in the corresponding operation expectation of the power distribution network as a power distribution task execution speed threshold, when the power distribution network starts to operate, marking the time period of increasing the execution speed of the power distribution task at the operation starting moment to the power distribution task execution speed threshold as a static operation time period, marking the operation state of the power distribution network in the static operation time period as static operation, and judging whether the static detection of the power distribution network is qualified or not through static operation analysis;
step three, analyzing the operation faults of the power distribution network after the static detection of the power distribution network is qualified, and dividing the operation faults into high-influence faults and low-influence faults through analysis;
and step four, carrying out efficiency detection on risk control of different fault types in the operation process of the power distribution network, analyzing operation parameters of the power distribution network when the operation faults of the power distribution network occur, acquiring a risk control efficiency detection coefficient in the operation process of the power distribution network through analysis, and comparing whether the risk control efficiency is normal or not according to the risk control efficiency detection coefficient.
The formulas are obtained by acquiring a large amount of data and performing software simulation, and the coefficients in the formulas are set by the technicians in the field according to actual conditions;
when the stability analysis system is used, the stability analysis unit of the power distribution network is used for carrying out stability analysis on the power distribution network, judging whether the running process of the power distribution network is stable or not, analyzing and obtaining a stability analysis coefficient of the power distribution network in an execution time period, comparing the stability analysis coefficient of the power distribution network to generate a stability analysis qualified signal and a stability analysis unqualified signal, and sending the stability analysis qualified signal and the stability analysis unqualified signal to a server; detecting the initial operation of the power distribution network through a static operation detection unit, marking the execution speed of a power distribution task in a corresponding operation expectation of the power distribution network as a power distribution task execution speed threshold, marking the time period of increasing the execution speed of the power distribution task at the operation starting moment to the execution speed threshold of the power distribution task as a static operation time period when the power distribution network starts to operate, marking the operation state of the power distribution network in the static operation time period as static operation, generating a static detection unqualified signal and a static detection qualified signal through static operation analysis, and sending the static detection unqualified signal and the static detection qualified signal to a server; after the static operation of the power distribution network is completed, the fault influence detection unit analyzes the operation faults of the power distribution network, divides the operation faults into high-influence faults and low-influence faults through analysis, and sends the high-influence faults and the low-influence faults to the server; the method comprises the steps of carrying out efficiency detection on fault risk control in the operation process of the power distribution network through a risk control efficiency detection unit, analyzing operation parameters of the power distribution network when operation faults of the power distribution network occur, obtaining risk control efficiency detection coefficients in the operation process of the power distribution network through analysis, comparing the risk control efficiency detection coefficients to generate a risk control efficiency detection unqualified signal and a risk control efficiency detection qualified signal, and sending the risk control efficiency detection unqualified signal and the risk control efficiency detection qualified signal to a server.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The utility model provides an alternating current-direct current hybrid power distribution network operation stability evaluation system which characterized in that, including the server, server communication connection has:
the power distribution network stability analysis unit is used for analyzing the stability of the power distribution network, judging whether the running process of the power distribution network is stable or not, acquiring a stability analysis coefficient of the power distribution network in an execution time period through analysis, comparing the stability analysis coefficient of the power distribution network to generate a stability analysis qualified signal and a stability analysis unqualified signal, and sending the stability analysis qualified signal and the stability analysis unqualified signal to the server;
the static operation detection unit is used for detecting the initial operation of the power distribution network, marking the execution speed of the power distribution task in the corresponding operation expectation of the power distribution network as a power distribution task execution speed threshold, marking the time period of increasing the execution speed of the power distribution task at the operation starting moment to the execution speed threshold of the power distribution task as a static operation time period when the power distribution network starts to operate, marking the operation state of the power distribution network in the static operation time period as static operation, generating a static detection unqualified signal and a static detection qualified signal through static operation analysis, and sending the static detection unqualified signal and the static detection qualified signal to the server;
the fault influence detection unit is used for analyzing the operation faults of the power distribution network after the power distribution network finishes static operation, dividing the operation faults into high-influence faults and low-influence faults through analysis, and sending the high-influence faults and the low-influence faults to the server;
the risk control efficiency detection unit is used for carrying out efficiency detection on fault risk control in the operation process of the power distribution network, analyzing the operation parameters of the power distribution network when the operation fault of the power distribution network occurs, and marking the corresponding operation parameters as the influence parameters of the operation fault if the floating frequency of the operation parameters of the power distribution network exceeds a floating frequency threshold value when the operation fault of the power distribution network occurs; and acquiring a risk control efficiency detection coefficient in the operation process of the power distribution network through analysis, comparing the risk control efficiency detection coefficient to generate a risk control efficiency detection unqualified signal and a risk control efficiency detection qualified signal, and sending the risk control efficiency detection unqualified signal and the risk control efficiency detection qualified signal to a server.
2. The system for evaluating the operation stability of the alternating current-direct current hybrid power distribution network according to claim 1, wherein the operation process of the power distribution network stability analysis unit is as follows:
acquiring an operation time period of the power distribution network, marking the operation time period as an execution time period, constructing an operation expectation of the power distribution network according to the task amount of the power distribution network in the execution time period, and acquiring the frequency which is not met by the operation expectation of the power distribution network in the execution time period and the reduction of the operation expected income when the operation expectation is not met; acquiring the probability that the operation is expected to be completed within the set time within the execution time period; obtaining a stability analysis coefficient of the power distribution network in an execution time period through analysis; comparing the stability analysis coefficient of the power distribution network in the execution time period with a stability analysis coefficient threshold value:
if the stability analysis coefficient of the power distribution network in the execution time period exceeds the stability analysis coefficient threshold value, judging that the stability analysis of the power distribution network in the execution time period is qualified, generating a stability analysis qualified signal and sending the stability analysis qualified signal to a server; and if the stability analysis coefficient of the power distribution network in the execution time period does not exceed the stability analysis coefficient threshold, judging that the stability analysis of the power distribution network in the execution time period is unqualified, generating a unqualified stability analysis signal and sending the unqualified stability analysis signal to the server.
3. The system for evaluating the operation stability of the alternating current-direct current hybrid power distribution network according to claim 1, wherein the operation process of the static operation detection unit is as follows:
the distribution network static operation process distribution fault occurrence frequency and distribution fault occurrence back controllable probability are collected and compared with the fault occurrence frequency threshold and the controllable probability threshold respectively:
if the distribution fault occurrence frequency exceeds a fault occurrence frequency threshold value in the static operation process of the distribution network or the controllable probability exceeds a controllable probability threshold value after the distribution fault occurs, generating a static detection unqualified signal and sending the static detection unqualified signal to a server; and if the distribution fault occurrence frequency does not exceed the fault occurrence frequency threshold value in the static operation process of the distribution network and the controllable probability does not exceed the controllable probability threshold value after the distribution fault occurs, generating a static detection qualified signal and sending the static detection qualified signal to the server.
4. The system for evaluating the operation stability of the alternating current-direct current hybrid power distribution network according to claim 1, wherein the operation process of the fault influence detection unit is as follows:
the frequency which can be automatically recovered after the operation fault occurs in the operation process of the power distribution network and the probability of continuous occurrence after the corresponding type operation fault is maintained are collected and respectively compared with an automatic recovery frequency threshold value and a continuous occurrence probability threshold value:
if the frequency capable of automatically recovering after the operation fault occurs in the operation process of the power distribution network does not exceed the automatic recovery frequency threshold value, or the probability of continuous occurrence after the maintenance of the corresponding type of operation fault exceeds the continuous occurrence probability threshold value, marking the corresponding operation fault as a high-influence fault, and correspondingly sending the high-influence fault type to a server;
if the frequency capable of automatically recovering after the operation fault occurs in the operation process of the power distribution network exceeds the automatic recovery frequency threshold value and the probability of continuous occurrence after the maintenance of the corresponding type of operation fault does not exceed the continuous occurrence probability threshold value, marking the corresponding operation fault as a low-influence fault and correspondingly sending the type of the low-influence fault to the server.
5. The system for evaluating the operation stability of the alternating current-direct current hybrid power distribution network according to claim 1, wherein the operation process of the risk control efficiency detection unit is as follows:
acquiring interval duration of an influence parameter floating moment and a control moment in the operation process of the power distribution network and reduction of the floating speed after the influence parameter control floating, and respectively marking the interval duration of the influence parameter floating moment and the control moment and the reduction of the floating speed after the influence parameter control floating in the operation process of the power distribution network as JG and JD; acquiring the probability in the range of the numerical control threshold of the influencing parameter in the running process of the power distribution network, and marking the probability in the range of the numerical control threshold of the influencing parameter in the running process of the power distribution network as GL;
by the formula
Acquiring a risk control efficiency detection coefficient C in the operation process of the power distribution network, wherein s1, s2 and s3 are preset proportionality coefficients, s1 is greater than s2 and greater than s3 and greater than 0, beta is a fault influence coefficient, and when the operation fault type is a high-influence fault type, the value of beta is 0.8; when the operation fault type is a low-influence fault type, the value of beta is 1.05;
comparing a risk control efficiency detection coefficient C with a risk control efficiency detection coefficient threshold value in the operation process of the power distribution network:
if the risk control efficiency detection coefficient C in the operation process of the power distribution network exceeds the risk control efficiency detection coefficient threshold, judging that the risk control efficiency detection in the operation process of the power distribution network is qualified, generating a risk control efficiency detection qualified signal and sending the risk control efficiency detection qualified signal to a server;
and if the risk control efficiency detection coefficient C in the operation process of the power distribution network does not exceed the risk control efficiency detection coefficient threshold, determining that the risk control efficiency detection in the operation process of the power distribution network is unqualified, generating a risk control efficiency detection unqualified signal and sending the risk control efficiency detection unqualified signal to the server.
6. The method for evaluating the running stability of the alternating current-direct current hybrid power distribution network is characterized by comprising the following specific stability evaluation method processes:
the method comprises the following steps of firstly, analyzing the stability of the power distribution network, judging whether the operation process of the power distribution network is stable or not, acquiring a stability analysis coefficient of the power distribution network in an execution time period through analysis, and comparing and judging whether the stability of the power distribution network is qualified or not according to the stability analysis coefficient of the power distribution network;
when the stability of the power distribution network is unqualified, detecting the initial operation of the power distribution network, marking the execution speed of the power distribution task in the corresponding operation expectation of the power distribution network as a power distribution task execution speed threshold, marking the time period when the execution speed of the power distribution task at the operation starting moment is increased to the power distribution task execution speed threshold as a static operation time period when the power distribution network starts to operate, marking the operation state of the power distribution network in the static operation time period as static operation, and judging whether the static detection of the power distribution network is qualified or not through static operation analysis;
step three, analyzing the operation faults of the power distribution network after the static detection of the power distribution network is qualified, and dividing the operation faults into high-influence faults and low-influence faults through analysis;
and fourthly, carrying out efficiency detection on the risk control of different fault types in the operation process of the power distribution network, analyzing the operation parameters of the power distribution network when the operation faults of the power distribution network occur, acquiring a risk control efficiency detection coefficient in the operation process of the power distribution network through analysis, and comparing whether the risk control efficiency is normal or not according to the risk control efficiency detection coefficient.
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