CN109583028B - Scheduling power plant accident total signal synthesis method and system - Google Patents
Scheduling power plant accident total signal synthesis method and system Download PDFInfo
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Abstract
The invention discloses a method and a system for synthesizing accident total signals of a power plant for dispatching, wherein the method comprises the following implementation steps: synthesizing interval accident signals of the power plant unit by using local data of the power plant and adopting a hard contact method or software logic, and synthesizing non-unit interval accident signals of the power plant by adopting a hard contact method or software logic; the method comprises the steps that the rising edges of interval accident signals of all power plant units and non-unit interval accident signals of the power plants are logically synthesized through an OR gate to obtain a total accident signal of the power plant for dispatching; the system comprises a software or hardware system corresponding to the method. The invention only depends on the existing local data information, can synthesize the accurate total signal data of the power plant accident on the spot, and has the advantages of low cost, easy realization on the spot, high accuracy and no increase of the data transmission quantity between the power plant and the regulation center.
Description
Technical Field
The invention relates to a technology for synthesizing a total accident signal of a power plant, in particular to a method and a system for synthesizing a total accident signal of the power plant for dispatching, which are used for synthesizing the total accident signal of the power plant according to various local signals of the power plant so as to be conveniently transmitted to a power grid dispatching control center.
Background
The accident total signal is a power failure of equipment caused by whether serious faults occur or not in the representation of a power plant and a transformer substation, and is generally synthesized according to certain logic according to local data information (such as switch trip information, a protection action signal, a switch position signal and the like). And the accident total signal is sent to a power grid dispatching control center, is used for overall dispatching and emergency treatment starting of the whole power system, and is very important information data in safe and stable operation of the power system.
The existing accident total signal synthesis method and system related to scheduling are fewer: for example, the chinese patent document No. 201410207606.2 discloses a method for rapidly positioning an interval fault of an accident substation, in which a protection opening outlet signal and a switch opening signal are logically synthesized into a total accident signal, but the method does not relate to a power plant, the unit interval of the power plant is greatly different from the substation, the protection opening outlet signal is likely to be sent out even when the power plant is stopped, and the method cannot avoid total accident missending during maintenance, so that the power plant cannot adopt the method; if the device is also disclosed in the patent document No. 201610428779.6, the device can automatically collect and release the power grid fault information, collect all the telemetering and remote signaling data to a central processing unit (a dispatching control center), and then analyze, judge and reverse-correct the data.
At present, the method for synthesizing the accident total signal of the power plant is simpler, and generally, the protection signal is directly 'and' is taken as the accident total signal to be sent up. The protection signals involved in the synthesis include protection trip signals, protection alarm signals and even protection starting signals. This results in that when the power plant is started/stopped and operated for switching, the grid dispatching control center receives a large amount of total signals of mishaped accidents, which seriously affects the overall dispatching and emergency disposal of the power system.
And a large amount of local data information (such as switch trip information, protection action signals, switch position signals and the like) is far beyond the power grid dispatching control center, and then the accident is identified. This is obviously unlikely. And more sensors and sampling devices are added on the spot, so that the data information amount is increased, and the accuracy of the synthesized accident total signal is improved. This is also less easy to implement from a cost point of view.
Therefore, a method and a system for synthesizing a total accident signal of a power plant for scheduling are needed, which can synthesize relatively accurate total accident signal data of the power plant on site only by using the existing local data information, so that a power grid scheduling control center can accurately master the operation condition of grid-connected power plant equipment, and the method and the system are favorable for the safe and stable operation of a power system.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the invention can synthesize more accurate total signal data of the power plant accident on site only by depending on the existing local data information, and has the advantages of low cost, easy realization on site, high accuracy and no increase of data transmission quantity between the power plant and a regulation center.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method for synthesizing accident total signals of a power plant for dispatching comprises the following implementation steps:
synthesizing an interval accident signal of the generating plant unit by using local data of the generating plant and adopting a hard contact method or software logic; in addition, a hard contact method or software logic is adopted to synthesize a non-unit interval accident signal of the power plant by utilizing the local data of the power plant;
and logically synthesizing the generator set interval accident signals of each power plant and the rising edges of the non-generator set interval accident signals of the power plant through an OR gate to obtain a total accident signal of the power plant for dispatching.
Optionally, the synthesizing of the power plant unit interval accident signal by using the hard-contact method includes:
collecting a tripping signal which is formed by a signal of a position relay KKJ and a signal of a tripping position relay TWJ after a switch is closed and does not correspond to the position, an operation state judgment signal which is formed by a generator stopping signal and a unit switch closing signal and a maintenance state signal which is formed by an I/II bus knife separating signal and a unit maintenance state signal;
and logically synthesizing the tripping signal, the operation state judgment signal and the maintenance state signal which do not correspond to the positions into interval accident signals of all the units of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting.
Optionally, the position non-corresponding trip signal is logically synthesized by a signal of the position relay KKJ after the switch is closed and a signal of the trip position relay TWJ through an and gate.
Optionally, the operation state judgment signal is triggered by a generator shutdown signal, the unit switch on-off signal is reset, and then the operation state judgment signal is logically synthesized through a not gate.
Optionally, the overhaul state signal is logically synthesized by an and gate through an i/ii bus isolation bit signal, then is logically synthesized by an or gate through a unit overhaul state signal, and finally is logically synthesized by a not gate.
Optionally, when the position that the signal of position relay KKJ after the switch is closed and the signal of trip position relay TWJ are collected does not correspond to the trip signal, the operation state judgment signal that the generator stop signal and the unit switch are closed and the overhaul state signal that the i/ii mother isolating knife position signal and the unit overhaul state signal are formed, the method further includes the step of performing anti-shake screening on the original signal of position relay KKJ after the switch is closed, the original signal of trip position relay TWJ, the original generator stop signal, the unit switch is closed, the original i/ii mother isolating knife position signal and the original unit overhaul state signal.
Optionally, the synthesizing of the non-inter-unit accident signal of the power plant by using the hard-junction method includes:
collecting a position non-corresponding tripping signal formed by a signal of a position relay KKJ and a signal of a tripping position relay TWJ after a switch is switched on and a maintenance state signal formed by an I/II mother knife separation position signal and an interval maintenance state signal;
and logically synthesizing the tripping signal and the maintenance state signal which do not correspond to the positions into interval accident signals of all non-unit intervals of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting.
Optionally, the position non-corresponding trip signal is logically synthesized by a signal of the position relay KKJ after the switch is closed and a signal of the trip position relay TWJ through an and gate.
Optionally, the overhaul state signal is logically synthesized by an and gate through an i/ii mother partition bit signal, then logically synthesized by an or gate through an interval overhaul state signal, and finally logically synthesized by a not gate.
Optionally, when the position formed by the signal of the position relay KKJ after the switch is switched on and the signal of the trip position relay TWJ is not corresponding to the trip signal and the maintenance state signal formed by the master knife separation position signal of i/ii and the interval maintenance state signal, the method further comprises the step of performing anti-shake screening on the original signal of the position relay KKJ after the switch is switched on, the original signal of the trip position relay TWJ, the original master knife separation position signal of i/ii and the original interval maintenance state signal respectively.
Optionally, the synthesizing of the power plant unit interval accident signal by using the software logic includes:
collecting an interval protection tripping signal consisting of a unit interval tripping switch protection action signal, a thermotechnical/water machine tripping switch protection action signal and an I/II mother protection action signal, a unit switch position dividing signal, an operation state judgment signal consisting of a generator shutdown signal and a unit switch on-position signal and a maintenance state signal consisting of an I/II mother isolation knife position dividing signal and a unit maintenance state signal;
and (3) logically synthesizing the interval protection trip signal, the unit switch position division signal, the operation state judgment signal and the maintenance state signal into interval accident signals of each unit interval of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting.
Optionally, the interval protection tripping signal is logically synthesized by an and gate of a delayed rising edge of the i/ii mother protection action signal and a corresponding i/ii mother side interval switch closing signal, and then logically synthesized by an or gate of a delayed rising edge of the unit interval trip switch protection action signal and a delayed rising edge of the thermotechnical/water machine trip switch protection action signal.
Optionally, the operating state determining signal is triggered by a generator shutdown signal, and the unit switch on-off signal is reset and then logically synthesized through a not gate.
Optionally, the overhaul state signal is logically synthesized by an and gate through an i/ii bus isolation knife split signal, then logically synthesized by an or gate through a unit overhaul state signal, and finally logically synthesized by a not gate.
Optionally, the unit switch split-level signal is obtained by broadening the rising edge of a unit switch split-level signal acquired on the spot.
Optionally, the method further includes the step of performing anti-shake screening on the original unit interval skip switch protection action signal, the original thermal/water machine skip switch protection action signal, the original i/ii master isolation knife separation signal, the original generator shutdown signal, the original i/ii master protection action signal, the original unit switch separation signal, the original generator shutdown signal, the original unit switch closure position signal, the original i/ii master isolation knife separation position signal, and the original unit maintenance state signal, respectively, when acquiring an interval protection trip signal composed of the unit interval skip switch protection action signal, the thermal/water machine skip switch protection action signal, and the i/ii master protection action signal, the operation state judgment signal composed of the generator shutdown signal and the unit maintenance state signal.
Optionally, the synthesizing a non inter-unit accident signal of the power plant by using software logic includes:
collecting an interval protection tripping signal and a switch separation signal which are composed of an interval tripping switch protection action signal, an adjacent interval tripping switch protection action signal and an I/II mother protection action signal, and a maintenance state signal which is composed of an I/II mother separation knife separation position signal and an interval maintenance state signal;
and logically synthesizing the interval protection tripping signal, the unit switch position division signal and the overhaul state signal into interval accident signals of all non-unit intervals of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting.
Optionally, the interval protection tripping signal is logically synthesized with an interval switch protection action signal and a rising edge of an adjacent interval switch protection action signal through an or gate after a rising edge of the i/ii mother protection action signal is delayed and then is logically synthesized with a corresponding i/ii mother side interval switch closing signal through the and gate.
Optionally, the overhaul state signal is logically synthesized by an and gate through an i/ii bus isolation bit signal, then is logically synthesized by an or gate through an interval overhaul state signal and a line side isolation bit signal, and finally is logically synthesized by a not gate.
Optionally, the switch sub-bit signal is obtained by widening the rising edge of a locally acquired switch sub-bit signal.
Optionally, when acquiring an interval protection tripping signal, a switch separation signal and an overhaul state signal, the interval protection tripping signal and the switch separation signal are composed of an interval trip switch protection action signal, an adjacent interval trip switch protection action signal and an i/ii mother protection action signal, and the overhaul state signal is composed of an i/ii mother isolation switch separation signal and an interval overhaul state signal, the method further includes the step of performing anti-shake screening on the original interval trip switch protection action signal, the original adjacent interval trip switch protection action signal, the original i/ii mother protection action signal, the original switch separation signal, the original i/ii mother isolation switch separation signal and the original interval overhaul state signal respectively.
The invention also provides a scheduling power plant accident total signal synthesizing system, which comprises computer equipment programmed to execute the steps of the scheduling power plant accident total signal synthesizing method.
The invention also provides a power plant accident total signal synthesis system for scheduling, which comprises:
the power plant unit interval accident signal synthesis device is used for synthesizing a power plant unit interval accident signal by adopting a hard contact method or software logic;
the device for synthesizing the non-unit interval accident signal of the power plant is used for synthesizing the non-unit interval accident signal of the power plant by adopting a hard contact method or software logic;
the power plant accident total signal synthesis equipment is used for synthesizing the rising edge of each power plant unit interval accident signal and the power plant non-unit interval accident signal through an OR gate logic to obtain a scheduling power plant accident total signal.
Compared with the prior art, the invention has the following advantages: the invention synthesizes the interval accident signals of the power plant unit by using the local data of the power plant by adopting a hard contact method or software logic, synthesizes the interval accident signals of the power plant unit by adopting the hard contact method or the software logic, and finally synthesizes the interval accident signals of each power plant unit and the rising edges of the interval accident signals of the power plant unit by adopting an OR gate logic to obtain the accident total signals of the power plant for dispatching.
Drawings
FIG. 1 is a schematic diagram of a basic process flow of a method according to an embodiment of the present invention.
Fig. 2 is a logic diagram of a composite interval accident signal of an interval of a power plant unit according to an embodiment of the present invention.
Fig. 3 is a logic diagram of a non-interval accident signal of a synthetic power plant unit according to an embodiment of the present invention.
FIG. 4 is a logic diagram of a synthesized power plant accident total signal according to an embodiment of the present invention.
Fig. 5 is a logic diagram of synthesizing an interval accident signal of an interval of a power plant unit according to a second embodiment of the present invention.
Fig. 6 is a logic diagram of a non-spaced accident signal of a synthesized power plant unit according to a second embodiment of the present invention.
Detailed Description
The first embodiment is as follows:
as shown in fig. 1, the implementation steps of the method for synthesizing the total accident signal of the power plant for dispatching in this embodiment include:
synthesizing an interval accident signal of a generating plant unit by utilizing local data of the generating plant and adopting a hard contact method; in addition, a hard contact method is adopted to synthesize a non-unit interval accident signal of the power plant by utilizing the local data of the power plant;
and logically synthesizing the generator set interval accident signals of each power plant and the rising edges of the non-generator set interval accident signals of the power plant through an OR gate to obtain a total accident signal of the power plant for dispatching.
In this embodiment, the power plant unit interval refers to a power generating unit, a corresponding prime mover and its accessories, such as an excitation system, a speed regulator, etc.; the non-unit interval of the power plant is an electrical unit which is divided according to the circuit breaker and has perfect functions; if the power plant unit adopts a unit wiring mode (namely, one step-up transformer corresponds to one unit), the step-up transformer belongs to the corresponding unit interval and does not form an interval independently; if the power plant unit adopts an expanded unit wiring mode (namely, one step-up transformer corresponds to a plurality of units), the step-up transformer independently becomes an interval which is a non-unit interval of the power plant.
As shown in fig. 2, the method for synthesizing the interval accident signal of the power plant unit by using the hard-point method includes:
collecting a position non-corresponding tripping signal formed by a signal of a position relay KKJ and a signal of a tripping position relay TWJ after a switch is switched on, an operation state judgment signal formed by a generator shutdown signal and a unit switch on-position signal and a maintenance state signal formed by an I/II bus knife separating position signal and a unit maintenance state signal;
and logically synthesizing the tripping signal, the operation state judgment signal and the maintenance state signal which do not correspond to the positions into interval accident signals of all the units of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting.
In this embodiment, the delay time of the automatic delay resetting is 15s.
As shown in fig. 2, the trip signal of the position non-corresponding is logically synthesized by the signal of the position relay KKJ after the switch is turned on and the signal of the trip position relay TWJ through an and gate. In the embodiment, the interval accident signals at intervals are synthesized by logic of an AND gate passing signal of a position relay KKJ/HHJ after the circuit breaker is switched on and a signal of a tripping position relay TWJ, wherein the signal of the position relay KKJ/HHJ after the circuit breaker is switched on is a signal for reflecting the switching-on and switching-off position of the circuit breaker, and if the circuit breaker is in the open position, the signal of the position relay KKJ/HHJ after the circuit breaker is switched on is 1; and if the breaker is in the closed position, the signal of the position relay KKJ/HHJ after the breaker switch is closed is 0. The signal of the trip position relay TWJ is a signal which reflects that the protection action is in trip, if the protection action is in trip, the signal of the trip position relay TWJ is 1; the signal of the trip position relay TWJ is 0 if the protection is not acting on the trip. The operation state judgment signal is used for avoiding the error triggering of the interval accident signal when the generator set is stopped, and the overhaul state signal is used for avoiding the error triggering of the interval accident signal when the overhaul test is carried out.
As shown in fig. 2, the operation state determination signal is triggered by the generator stop signal, the unit switch on-off signal is reset, and then the signals are logically synthesized through the not gate.
As shown in FIG. 2, the overhaul state signal is logically synthesized by an I/II bus isolation knife split bit signal through an AND gate, then logically synthesized with a unit overhaul state signal through an OR gate, and finally logically synthesized through an NOT gate.
As shown in fig. 2, when acquiring a position non-corresponding trip signal formed by a signal of the position relay KKJ after the switch is closed and a signal of the trip position relay TWJ, an operation state judgment signal formed by a generator stop signal and a unit switch on-position signal, and an overhaul state signal formed by a master blade separation position signal i/ii and a unit overhaul state signal, the method further includes a step of performing anti-shake screening on an original signal of the position relay KKJ after the original switch is closed, an original signal of the trip position relay TWJ, an original generator stop signal, an original unit switch on-position signal, an original master blade separation position signal i/ii, and an original unit overhaul state signal. The anti-shake screening specifically refers to judging whether a signal is in a high level state or not after a signal high level is judged, whether the signal is in a high level state or not is judged once again after a specified time is delayed, if the signal is still in the high level state, the signal is judged to pass the screening and wait for a signal low level, if the signal is reduced to the low level, a relevant signal (a signal of a position relay KKJ after a switch is closed, a signal of a trip position relay TWJ, a generator stop signal, a unit switch closing signal, an I/II mother isolation knife separating signal and a unit maintenance state signal) is judged and detected, and the anti-interference capability and the detection precision can be improved through the anti-shake screening.
As shown in fig. 3, the method for synthesizing the non-unit interval accident signal of the power plant by using the hard contact method comprises the following steps:
collecting a position non-corresponding trip signal formed by a signal of a position relay KKJ and a signal of a trip position relay TWJ after a switch is switched on and an overhaul state signal formed by an I/II mother isolation knife position separating signal and an interval overhaul state signal;
and logically synthesizing the trip signal and the maintenance state signal which do not correspond to the positions into interval accident signals of all non-unit intervals of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting. In this embodiment, the delay time of the automatic delay resetting is 15s.
As shown in fig. 3, the trip signal of the position non-corresponding is logically synthesized by the signal of the position relay KKJ after the switch is turned on and the signal of the trip position relay TWJ through an and gate.
As shown in FIG. 3, the overhaul state signal is logically synthesized by an AND gate through an I/II mother isolated bit signal, then logically synthesized by an OR gate with an interval overhaul state signal, and finally logically synthesized by an NOT gate.
As shown in fig. 3, when the position formed by the signal of the position relay KKJ after the switch is closed and the signal of the trip position relay TWJ is not corresponding to the trip signal and the maintenance state signal formed by the i/ii mother isolation knife off position signal and the interval maintenance state signal, the method further comprises the step of performing anti-shake screening on the original signal of the position relay KKJ after the switch is closed, the original signal of the trip position relay TWJ, the original i/ii mother isolation knife off position signal and the original interval maintenance state signal respectively. The anti-shake screening specifically refers to judging after the signal high level, whether the signal high level is the just high level state or not is judged again after the specified time is delayed, if the signal high level state is still judged, the signal low level is judged to pass through the screening and waited for again, if the signal is reduced to the low level, the relevant signal (the signal of position relay KKJ after the switch is closed, the signal of trip position relay TWJ, I/II female knife separation position signal and interval maintenance state signal) is judged and detected, the anti-interference capability can be improved through the anti-shake screening, and the detection precision is improved.
As shown in fig. 4, in this embodiment, each of the power plant inter-unit accident signals and the power plant non-inter-unit accident signals respectively includes: a # n generator interval accident signal, a # n main transformer interval accident signal, a # n line interval accident signal, a # n starting backup interval accident signal, a # n bus-to-bus interval accident signal and the like. And logically synthesizing the generator set interval accident signals of each power plant and the rising edges of the non-generator set interval accident signals of the power plant through an OR gate to obtain a total accident signal of the power plant for dispatching.
In addition, the present embodiment also provides a total signal synthesis system for scheduled power plant accidents, which includes a computer device programmed to execute the steps of the total signal synthesis method for scheduled power plant accidents according to the present embodiment.
In addition, this embodiment still provides a power plant accident total signal synthesis system for dispatch, includes:
the power plant unit interval accident signal synthesis device is used for synthesizing a power plant unit interval accident signal by adopting a hard contact method;
the non-unit interval accident signal synthesis equipment of the power plant is used for synthesizing a non-unit interval accident signal of the power plant by adopting a hard contact method;
the power plant accident total signal synthesis equipment is used for synthesizing the rising edge of each power plant unit interval accident signal and the power plant non-unit interval accident signal through an OR gate logic to obtain a scheduling power plant accident total signal.
The number of the interval accident signal synthesis equipment of the power plant unit is at least one, a position non-corresponding tripping signal formed by a signal of a position relay KKJ and a signal of a tripping position relay TWJ after a switch is closed, an operation state judgment signal formed by a generator stop signal and a unit switch closing signal and an overhaul state signal formed by an I/II mother knife separating signal and a unit overhaul state signal are collected, the position non-corresponding tripping signal, the operation state judgment signal and the overhaul state signal are logically synthesized into interval accident signals of each unit interval of the power plant through an AND gate, and the interval accident signals are provided with time delay automatic resetting. The number of the non-unit interval accident signal synthesis equipment in the power plant is at least one, a position non-corresponding tripping signal formed by a signal of a position relay KKJ and a signal of a tripping position relay TWJ after a switch is switched on and an overhaul state signal formed by an I/II mother knife separation position signal and an interval overhaul state signal are collected, the position non-corresponding tripping signal and the overhaul state signal are logically synthesized into interval accident signals of all non-unit intervals in the power plant through an AND gate, and the interval accident signals are provided with time delay automatic resetting. The total accident signal synthesizing equipment of the power plant synthesizes the total accident signals of the power plant for dispatching according to OR gate logic on the rising edge of the interval accident signals of each unit interval and non-unit interval of the power plant, and transmits the total accident signals of the power plant for dispatching to a power grid dispatching control center through a telecontrol device or an RTU.
Example two:
the present embodiment is substantially the same as the first embodiment, and the main differences are as follows: in the present embodiment, as shown in parenthesis in fig. 1, the power plant inter-unit accident signal is synthesized by using the local data of the power plant and the non-inter-unit accident signal is synthesized by using the local data of the power plant and the software logic. Needless to say, under other conditions of this technical solution, a person skilled in the art may also arbitrarily arrange and combine the power plant unit interval accident signal synthesized by using the hard-point method or the software logic and the power plant non-unit interval accident signal synthesized by using the hard-point method or the software logic according to needs, and besides the full hard-point method of the first embodiment and the full software logic synthesis of the second embodiment, the invention further includes four synthesis methods of the hard-point method and the software logic synthesis, and the principle of the four synthesis methods is the same as that of the first embodiment and the second embodiment, and therefore, the description thereof is omitted here.
As shown in fig. 5, the method for synthesizing the interval accident signal of the power plant unit by adopting the software logic comprises the following steps:
collecting an interval protection tripping signal consisting of a unit interval tripping switch protection action signal, a thermotechnical/water machine tripping switch protection action signal and an I/II mother protection action signal, a unit switch separate signal, an operation state judgment signal consisting of a generator stop signal and a unit switch on-position signal and a maintenance state signal consisting of an I/II mother isolation cutter separate signal and a unit maintenance state signal;
and (3) logically synthesizing the interval protection trip signal, the unit switch position division signal, the operation state judgment signal and the maintenance state signal into interval accident signals of each unit interval of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting. In this embodiment, the delay time of the automatic delay resetting is 10s.
In this embodiment, the power plant unit interval refers to a power plant unit, a corresponding prime mover and its accessories, such as an excitation system, a speed regulator, etc.; the non-unit interval of the power plant is an electrical unit which is divided according to the circuit breaker and has perfect functions; if the power plant unit adopts a unit wiring mode (namely one step-up transformer corresponds to one unit), the step-up transformer belongs to the corresponding unit interval and does not form an interval independently; if the power plant unit adopts an expanded unit wiring mode (namely, one step-up transformer corresponds to a plurality of units), the step-up transformer independently becomes an interval which is a non-unit interval of the power plant.
As shown in fig. 5, the interval protection tripping signal is logically synthesized by an and gate of a delayed rising edge of an i/ii mother protection action signal and a corresponding i/ii mother side interval switch closing signal, and then logically synthesized by an or gate of a delayed rising edge of a unit interval trip switch protection action signal and a rising edge of a thermotechnical/water machine trip switch protection action signal.
As shown in fig. 5, the operation state determination signal is triggered by the generator stop signal, and the unit switch on-off signal is reset and then logically synthesized by the not gate.
As shown in FIG. 5, the overhaul state signal is logically synthesized by an AND gate through an I/II bus isolation bit signal, then logically synthesized by an OR gate through a unit overhaul state signal, and finally logically synthesized by an NOT gate.
As shown in fig. 5, the unit switch split-bit signal is obtained by broadening the rising edge of the unit switch split-bit signal acquired on the spot.
As shown in fig. 5, when acquiring an interval protection tripping signal composed of a unit interval tripping switch protection action signal, a thermal/water machine tripping switch protection action signal, and an i/ii mother protection action signal, a unit switch separation signal, an operation state judgment signal composed of a generator shutdown signal and a unit switch closure signal, and an overhaul state signal composed of an i/ii mother isolation switch separation signal and a unit overhaul state signal, the method further includes a step of performing anti-shake screening on the original unit interval tripping switch protection action signal, the original thermal/water machine tripping switch protection action signal, the original i/ii mother protection action signal, the original unit switch separation signal, the original generator shutdown signal, the original unit switch closure signal, the original i/ii mother isolation switch separation signal, and the original unit overhaul state signal. The anti-shake screening specifically refers to judging whether a signal is in a high-level state or not after a signal high level is judged, delaying for a specified time, judging whether the signal is in a high-level state or not, if the signal is still in the high-level state, judging whether the signal passes the screening and waiting for a signal low level again, and judging whether related signals (a unit interval skip switch protection action signal, a thermal/water machine skip switch protection action signal, an I/II mother protection action signal, a unit switch separation signal, a generator stop signal, a unit switch closing signal, an I/II mother knife separation position signal and a unit overhaul state signal) are detected if the signal is reduced to the low level, wherein the anti-interference capability and the detection precision can be improved through the anti-shake screening.
As shown in fig. 6, the software logic is used to synthesize the non-inter-unit accident signal of the power plant, which includes:
collecting an interval protection tripping signal and a switch separate signal which are formed by an interval tripping switch protection action signal, an adjacent interval tripping switch protection action signal and an I/II mother protection action signal, and a maintenance state signal which is formed by an I/II mother isolating blade separate signal and an interval maintenance state signal;
and logically synthesizing the interval protection tripping signal, the unit switch position division signal and the overhaul state signal into interval accident signals of all non-unit intervals of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting. In this embodiment, the delay time of the automatic delay resetting is 10s.
As shown in fig. 6, the interval protection tripping signal is logically synthesized by an and gate through a rising edge of an i/ii mother protection action signal after being delayed and a corresponding i/ii mother side interval switch closing signal, and then logically synthesized by an or gate through a rising edge of an interval trip switch protection action signal and an adjacent interval trip switch protection action signal.
As shown in fig. 6, the overhaul state signal is logically synthesized by an and gate through an i/ii bus isolation bit signal, then logically synthesized by an or gate through an interval overhaul state signal and a line side isolation bit signal, and finally logically synthesized by a not gate.
As shown in fig. 6, the switch tap signal is obtained by widening the rising edge of the locally acquired switch tap signal.
As shown in fig. 6, when acquiring an interval protection tripping signal, a switch separation signal and an overhaul state signal, the interval protection tripping signal is composed of an interval trip switch protection action signal, an adjacent interval trip switch protection action signal and an i/ii mother protection action signal, the overhaul state signal is composed of an i/ii mother isolation switch separation signal and an interval overhaul state signal, the method further includes the step of performing anti-shake screening on the original interval trip switch protection action signal, the original adjacent interval trip switch protection action signal, the original i/ii mother protection action signal, the original switch separation signal, the original i/ii mother isolation switch separation signal and the original interval overhaul state signal respectively. The anti-shake screening specifically refers to judging whether a signal is in a high-level state or not after a signal high level is judged, delaying for a specified time, judging whether the signal is in a high-level state or not, if the signal is still in the high-level state, screening is passed and a signal low level is waited for again, if the signal is reduced to the low level, judging that a related signal (an interval jump switch protection action signal, an adjacent interval jump switch protection action signal, an I/II mother protection action signal, a switch decider signal, an I/II mother knife decider signal and an interval maintenance state signal) is detected, and improving the anti-interference capability and the detection precision through the anti-shake screening.
In addition, the present embodiment also provides a total signal synthesis system for scheduled power plant accidents, which includes a computer device programmed to execute the steps of the total signal synthesis method for scheduled power plant accidents according to the present embodiment.
In addition, this embodiment also provides a total signal synthesis system of power plant accident for dispatching, including:
the power plant unit interval accident signal synthesis device is used for synthesizing a power plant unit interval accident signal by adopting a hard contact method or software logic;
the non-unit interval accident signal synthesis equipment of the power plant is used for synthesizing non-unit interval accident signals of the power plant by adopting a hard contact method or software logic;
the power plant accident total signal synthesis equipment is used for synthesizing the rising edge of each power plant unit interval accident signal and the power plant non-unit interval accident signal through an OR gate logic to obtain a scheduling power plant accident total signal.
The number of the interval accident signal synthesis equipment of the power plant unit is at least one, and the interval accident signal synthesis equipment collects an interval protection tripping signal consisting of a unit interval tripping switch protection action signal, a thermal/water machine tripping switch protection action signal and an I/II mother protection action signal, a unit switch position separation signal, an operation state judgment signal consisting of a generator shutdown signal and a unit switch position separation signal and a maintenance state signal consisting of an I/II mother blade position separation signal and a unit maintenance state signal, synthesizes the interval accident signal of each unit interval of the power plant by an AND gate logic, and is provided with time delay automatic resetting. The number of the non-unit interval accident signal synthesis equipment in the power plant is at least one, an interval protection tripping signal and a switch separate signal which are composed of an interval tripping switch protection action signal, an adjacent interval tripping switch protection action signal and an I/II mother protection action signal, and an overhaul state signal which is composed of an I/II mother isolation knife separate signal and an interval overhaul state signal are collected, the interval protection tripping signal, the unit switch separate signal and the overhaul state signal are synthesized into interval accident signals of all non-unit intervals in the power plant through AND gate logic, and the interval accident signals are provided with time delay automatic resetting. The total accident signal synthesizing equipment of the power plant synthesizes the total accident signals of the power plant for dispatching according to OR gate logic on the rising edge of the interval accident signals of each unit interval and non-unit interval of the power plant, and transmits the total accident signals of the power plant for dispatching to a power grid dispatching control center through a telecontrol device or an RTU.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered as within the scope of the present invention.
Claims (22)
1. A method for synthesizing accident total signals of a power plant for dispatching is characterized by comprising the following implementation steps:
synthesizing an interval accident signal of a generating plant unit by using local data of the generating plant and adopting a hard contact method or software logic; synthesizing a non-unit interval accident signal of the power plant by using local data of the power plant and adopting a hard contact method or software logic;
the method comprises the steps that the rising edges of interval accident signals of all power plant units and non-unit interval accident signals of the power plants are logically synthesized through an OR gate to obtain a total accident signal of the power plant for dispatching;
and a hard contact method is adopted to synthesize an interval accident signal of the generating set, comprising the following steps:
collecting a position non-corresponding tripping signal formed by a signal of a position relay KKJ and a signal of a tripping position relay TWJ after a switch is switched on, an operation state judgment signal formed by a generator shutdown signal and a unit switch on-position signal and a maintenance state signal formed by an I/II bus knife separating position signal and a unit maintenance state signal;
and (3) logically synthesizing the tripping signal, the running state judgment signal and the maintenance state signal which do not correspond to the positions into an interval accident signal of each unit of the power plant through an AND gate, wherein the interval accident signal is provided with a time delay automatic reset.
2. The scheduling power plant accident total signal synthesizing method according to claim 1, wherein the position non-corresponding trip signal is logically synthesized by an and gate of a signal of the position relay KKJ and a signal of the trip position relay TWJ after the switch is turned on.
3. The method for synthesizing accident total signals of a power generation plant for dispatching according to claim 1, wherein the operation state judgment signal is triggered by a generator shutdown signal, the unit switch closing position signal is reset, and then the signals are synthesized through a NOT gate logic.
4. The method as claimed in claim 1, wherein the service status signal is logically combined with an and gate by an i/ii bus isolation bit signal, is logically combined with an or gate by a unit service status signal, and is logically combined with an not gate.
5. The method for synthesizing accident total signals of a power plant for dispatching according to claim 1, wherein when the position signal composed of the signal of the position relay KKJ after the switch is closed and the signal of the trip position relay TWJ is collected does not correspond to the trip signal, the operation state judgment signal composed of the generator stop signal and the unit switch on-position signal, and the overhaul state signal composed of the i/ii mother isolation switch off-position signal and the unit overhaul state signal, the method further comprises the step of performing anti-shake screening on the original signal of the position relay KKJ after the switch is closed, the original signal of the trip position relay TWJ, the original generator stop signal, the original unit switch on-position signal, the original i/ii mother isolation switch off-position signal, and the original unit overhaul state signal.
6. The method for synthesizing accident total signal of power plant for dispatching as claimed in claim 1, wherein said synthesizing the non-inter-unit accident signal of power plant by hard-point method comprises:
collecting a position non-corresponding tripping signal formed by a signal of a position relay KKJ and a signal of a tripping position relay TWJ after a switch is switched on and a maintenance state signal formed by an I/II mother knife separation position signal and an interval maintenance state signal;
and logically synthesizing the trip signal and the maintenance state signal which do not correspond to the positions into interval accident signals of all non-unit intervals of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting.
7. The scheduling power plant accident total signal synthesizing method according to claim 6, wherein the position non-corresponding trip signal is logically synthesized by an AND gate of a signal of the position relay KKJ and a signal of the trip position relay TWJ after the switch is turned on.
8. The method as claimed in claim 6, wherein the overhaul state signal is logically synthesized by an AND gate from an I/II mother bay separation bit signal, an OR gate from an overhaul state signal, and a NOT gate.
9. The method for synthesizing accident total signals of a power plant for dispatching according to claim 6, wherein when the position signal composed of the signal of the position relay KKJ and the signal of the trip position relay TWJ after the switch is switched on is collected, the trip signal is not corresponding to the position signal, and the overhaul state signal composed of the I/II mother knife separation position signal and the interval overhaul state signal, the method further comprises the step of performing anti-shake screening on the original signal of the position relay KKJ after the switch is switched on, the original signal of the trip position relay TWJ, the original I/II mother knife separation position signal and the original interval overhaul state signal respectively.
10. The method for synthesizing a total signal of a scheduled power plant accident according to claim 1, wherein the synthesizing of the power plant unit interval accident signal by using software logic comprises:
collecting an interval protection tripping signal consisting of a unit interval tripping switch protection action signal, a thermotechnical/water machine tripping switch protection action signal and an I/II mother protection action signal, a unit switch position dividing signal, an operation state judgment signal consisting of a generator shutdown signal and a unit switch on-position signal and a maintenance state signal consisting of an I/II mother isolation knife position dividing signal and a unit maintenance state signal;
and (3) logically synthesizing the interval protection trip signal, the unit switch position division signal, the operation state judgment signal and the maintenance state signal into interval accident signals of each unit interval of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting.
11. The method for synthesizing the accident total signal of the dispatching power plant according to claim 10, wherein the interval protection tripping signal is synthesized by logic of an AND gate through a rising edge of an I/II mother protection action signal after time delay and a corresponding I/II mother side interval switch closing signal, and then is synthesized by logic of an OR gate through a rising edge of a unit interval switch protection action signal after time delay and a rising edge of a thermal/water machine switch protection action signal after time delay.
12. The method for synthesizing accident total signals of a dispatching power plant according to claim 10, wherein the operation state judgment signal is triggered by a generator shutdown signal, the unit switch on-off signal is reset, and then the operation state judgment signal is synthesized through a NOT gate logic.
13. The method as claimed in claim 10, wherein the overhaul state signal is logically synthesized by an and gate from an i/ii mother bay separation bit signal, then logically synthesized by an or gate from a unit overhaul state signal, and finally logically synthesized by a not gate.
14. The method for synthesizing the accident total signal of the dispatching power plant according to claim 10, wherein the unit switch position signals are obtained by broadening rising edges of unit switch position signals acquired on site.
15. The method for synthesizing accident total signals of a power generation plant for dispatching according to claim 10, wherein the step of collecting the interval protection tripping signal composed of the unit interval tripping switch protection action signal, the thermal/water machine tripping switch protection action signal and the i/ii mother protection action signal, the unit switch separation signal, the operation state judgment signal composed of the generator stop signal and the unit switch on-position signal, and the overhaul state signal composed of the i/ii mother separation blade separation position signal and the unit overhaul state signal further comprises the step of performing anti-shake screening on the original unit interval tripping switch protection action signal, the original thermal/water machine tripping switch protection action signal, the original i/ii mother protection action signal, the original unit switch separation signal, the original generator stop signal, the original unit switch on-position signal, the original i/ii mother separation blade separation position signal, and the original unit overhaul state signal.
16. The method for synthesizing accident total signal of power plant for dispatching as claimed in claim 1, wherein said synthesizing the accident signal of non-inter-unit of power plant by software logic comprises:
collecting an interval protection tripping signal and a switch separation signal which are composed of an interval tripping switch protection action signal, an adjacent interval tripping switch protection action signal and an I/II mother protection action signal, and a maintenance state signal which is composed of an I/II mother separation knife separation position signal and an interval maintenance state signal;
and the interval protection trip signal, the unit switch position dividing signal and the maintenance state signal are logically synthesized into an interval accident signal of each non-unit interval of the power plant through an AND gate, and the interval accident signal is provided with time delay automatic resetting.
17. The method as claimed in claim 16, wherein the interval protection trip signal is logically combined with the corresponding i/ii parent side interval switch closing signal through an and gate after a delay from a rising edge of the i/ii parent protection operation signal, and then logically combined with the interval trip switch protection operation signal and a rising edge of the adjacent interval trip switch protection operation signal through an or gate.
18. The method as claimed in claim 16, wherein the service status signal is logically combined with an and gate by an i/ii mother blade separation bit signal, is logically combined with an or gate by an interval service status signal and a line side blade separation bit signal, and is logically combined by an not gate.
19. The method according to claim 16, wherein the switch tap signal is obtained by widening rising edges of locally-collected switch tap signals.
20. The method as claimed in claim 16, wherein the step of collecting the interval protection tripping signal, the switch separation signal and the overhaul state signal, the interval protection tripping signal is composed of an interval trip switch protection action signal, an adjacent interval trip switch protection action signal and an I/II mother protection action signal, and the step of anti-shaking screening is performed on the original interval trip switch protection action signal, the original adjacent interval trip switch protection action signal, the original I/II mother protection action signal, the original switch separation signal, the original I/II mother separation trip switch separation signal and the original interval overhaul state signal.
21. A scheduled power plant accident total signal synthesis system comprising computer equipment, wherein the computer equipment is programmed to perform the steps of the scheduled power plant accident total signal synthesis method of any one of claims 1 to 20.
22. A system for synthesizing accident total signals of a power plant for dispatching, comprising:
the power plant unit interval accident signal synthesis device is used for synthesizing the power plant unit interval accident signal by adopting a hard contact method or software logic;
the non-unit interval accident signal synthesis equipment of the power plant is used for synthesizing non-unit interval accident signals of the power plant by adopting a hard contact method or software logic;
the power plant accident total signal synthesis equipment is used for logically synthesizing the rising edges of the interval accident signals of the generator sets of each power plant and the interval accident signals of the non-generator sets of the power plant through an OR gate to obtain a scheduling power plant accident total signal;
the method for synthesizing the interval accident signal of the generator set of the power plant by adopting the hard contact method comprises the following steps:
collecting a tripping signal which is formed by a signal of a position relay KKJ and a signal of a tripping position relay TWJ after a switch is closed and does not correspond to the position, an operation state judgment signal which is formed by a generator stopping signal and a unit switch closing signal and a maintenance state signal which is formed by an I/II bus knife separating signal and a unit maintenance state signal;
and logically synthesizing the tripping signal, the operation state judgment signal and the maintenance state signal which do not correspond to the positions into interval accident signals of all the units of the power plant through an AND gate, wherein the interval accident signals are provided with time delay automatic resetting.
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