CN109768533B - Method for synchronizing actions of multiple sub-machines of in-situ component protection ring network - Google Patents
Method for synchronizing actions of multiple sub-machines of in-situ component protection ring network Download PDFInfo
- Publication number
- CN109768533B CN109768533B CN201811626204.0A CN201811626204A CN109768533B CN 109768533 B CN109768533 B CN 109768533B CN 201811626204 A CN201811626204 A CN 201811626204A CN 109768533 B CN109768533 B CN 109768533B
- Authority
- CN
- China
- Prior art keywords
- sub
- protection
- machines
- data
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a method for synchronously operating a plurality of sub-machines of a local component protection ring network, which aims to solve the technical problem of improving the operation stability of a power system. The invention comprises the following steps: the sub-machines collect the sampling values of the local side to form data message information and send the data message information to other sub-machines, the sub-machines carry out data synchronization on the sampling values of the other sides and the sampling values of the local side in real time, and the sub-machines protect synchronous actions. Compared with the prior art, the invention adopts data synchronization and sub-machine protection synchronization, quickly judges that under the condition that any one sub-machine has an action exit, adjusts the logic judgment of other sub-machines, realizes the consistency of the action behaviors of all the sub-machines in the ring network, prevents the action behavior difference of the ring network element protection sub-machines under the action critical state, completes each protection logic, is simple, safe and reliable, ensures the consistency of the protection action behaviors of a plurality of sub-machines in the ring network under the fault condition, improves the operation stability of the power system, and ensures the safe and reliable operation of the power system.
Description
Technical Field
The invention relates to a relay protection method, in particular to an in-situ protection method.
Background
The on-site protection device without protection and switch yard installation is verified and enters a commissioning stage, wherein element protection meets the requirements of miniaturization, simplified circuit and configuration, rapid action and direct tripping of cables of secondary equipment, the protection device adopts a distributed multi-sub-machine (sub-machine) structure, and the sub-machines perform data interaction by utilizing a ring network. Taking a transformer as an example, each submachine respectively acquires the analog quantity and the input quantity of one side of the secondary side and is responsible for the output of a tripping contact of the side, each submachine synchronously processes the analog quantity and the switching quantity data through a ring network, namely, each submachine independently completes the summary synchronization, the independent operation and the logic outlet judgment of self-acquired data and ring network transmission data, and each submachine only controls the tripping output which is responsible for the submachine. Therefore, the on-site element protection device in the prior art is composed of distributed sub-machines, each sub-machine is installed on site, the sub-machines communicate with each other through a double-loop network, each sub-machine completes the acquisition of the interval analog quantity and the switching value, information interaction is carried out through the loop network communication, and each sub-machine independently completes the protection function. The sub-machines adopt a cable direct tripping mode, namely, a loop between the protection device and the switch operation box adopts a cable direct connection mode, the local protection device receives the position of the breaker, the local interval input information adopts cable transmission, and starting and locking signals between the local interval input information and other devices adopt GOOSE network transmission. A cable access mode is used for a conventional mutual inductor for sampling the analog quantity of the submachine.
The protection device has very high requirements on the data and action synchronism of each sub machine of the ring network, and the action behaviors of each sub machine are required to be consistent under the fault condition. In the prior art, when each submachine acquires looped network transmission data and performs interpolation synchronization with self-acquired data and operates, certain errors exist in data transmission and operation results of different submachines due to different sampling moments and interpolation calculation moments, and if a fault occurs, the fault amount is just in an action critical state, the action behaviors of the submachines may be inconsistent, so that the condition that all sides of a transformer are not completely cut or the adjacent bus bars of the same bus bar are not completely cut is caused, and the operation stability of a power system is influenced.
Disclosure of Invention
The invention aims to provide a method for synchronously operating a plurality of sub-machines of a local component protection ring network, which aims to solve the technical problem of improving the operation stability of a power system.
The invention adopts the following technical scheme: a method for synchronizing actions of multiple sub-machines of an in-situ component protection ring network comprises the following steps:
firstly, collecting sampling values of the side by each submachine of the protection device: A. b, C three-phase voltage instantaneous value, three-phase current instantaneous value, input quantity state, protection action state data;
secondly, the sub-machine converts the acquired voltage instantaneous value, current instantaneous value and input quantity state of the sub-machine into digital quantity through analog-digital conversion, and forms data message information in an agreed unified format together with the protection action state data of the sub-machine.
Thirdly, the sub machine sends the data message information of the sub machine to the ring network in real time and sends the data message information to other sub machines through the ring network; meanwhile, the submachine acquires data message information sent by other submachines from the ring network;
fourthly, the sub-machines respectively obtain data of sampling voltage instantaneous values, current instantaneous values, switching value states and protection action states of other sub-machines according to the data message information of other sub-machines in the format agreed by the looped network messages, and store the data in the appointed memory of the sub-machine;
fifthly, the sub-machine carries out data synchronization on the data of the voltage and current instantaneous value, the switching value state and the protection action state of other sides and the data of the voltage and current instantaneous value, the switching value state and the protection action state of the sub-machine in real time;
sixthly, protecting synchronous action of submachine
When a fault occurs, the submachine outputs a control signal to the local side switch to control the submachine to trip, and other submachines judge whether protection starting and protection action conditions are met or not according to the synchronized voltage and current sampling data and the collected switching value state data, and the method comprises the following steps:
(1) if the protection starting and protection action conditions are met, the other submachine sends the summarized protection action state data to the ring network;
if the protection of other submachine is not started, entering a protection cooperative action logic judgment step;
(2) for the protection without time delay, directly reducing the protection action threshold to 80% threshold value; for the protection with time delay, the action time delay is reduced to 80% of the original action time delay when the action threshold of the protection is reduced to 80% of the threshold value;
(3) after 40ms, other sub machines still do not synchronously exit, and other sub machines send out an asynchronous protection action alarm signal.
The first side of the step of the invention is the secondary side of the transformer.
In the first step of the invention, each sub-machine of the protection device collects sampling values according to the sampling frequency of 0.833 ms.
A, B, C three-phase voltage instantaneous value, three-phase current instantaneous value and input quantity state of the invention in the first step, the protection action state data is:
the high-voltage side sub-machine acquires A, B, C three-phase voltage instantaneous values, three-phase current instantaneous values, high-voltage side input quantity states and high-voltage side protection action state data of a transformer secondary side high-voltage side;
the medium-voltage side sub-machine acquires A, B, C three-phase voltage instantaneous values, three-phase current instantaneous values, medium-voltage side input quantity states and medium-voltage side protection action state data of a transformer secondary side medium-voltage side;
the low-voltage side sub-machine collects A, B, C three-phase voltage instantaneous values, three-phase current instantaneous values, low-voltage side input quantity states and low-voltage side protection action state data of the secondary side low-voltage side of the transformer.
The submachine sends the data message information of the submachine to the ring network in real time according to the frequency of 0.833 ms.
According to the four-sub-machine, data of voltage instantaneous values, current instantaneous values, switching value states and protection action states sampled by other sub-machines are stored in a specified memory of the sub-machine, and data information of voltage and current instantaneous values, switching value states and protection action states of other sides of the secondary side of the transformer is formed.
And step five, data synchronization, namely caching the voltage and current instantaneous value data of the local side and the received voltage and current instantaneous value data of other sides by the sub-machine, and calculating sampling data of each channel at an appointed moment according to an interpolation synchronization method to obtain the voltage and current sampling data synchronized by the sub-machine.
And step five, synchronizing data, and summarizing and combining the switching value state data by the sub-machines to form the switching value state data after the sub-machines summarize.
And fifthly, synchronizing data, summarizing and combining the protection action state data of other submachine according to logic OR to form the protection action state data after the submachine is summarized.
Before the step six of the invention enters the logic judgment step of the protection cooperative action, the positive and negative codes are checked.
Compared with the prior art, the invention adopts data synchronization and sub-machine protection synchronization, quickly judges that under the condition that any one sub-machine has an action exit, adjusts the logic judgment of other sub-machines, realizes the consistency of the action behaviors of all the sub-machines in the ring network, prevents the action behavior difference of the ring network element protection sub-machines under the action critical state, completes each protection logic, is simple, safe and reliable, ensures the consistency of the protection action behaviors of a plurality of sub-machines in the ring network under the fault condition, improves the operation stability of the power system, and ensures the safe and reliable operation of the power system.
Drawings
Fig. 1 is a schematic diagram of a protection configuration of multiple sub-machines of the ring network transformer.
Fig. 2 is a flow chart of the method of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and examples.
In this embodiment, the method (method) for synchronizing actions of multiple sub-machines of the in-place component protection ring network of the present invention adopts an in-place transformer multiple sub-machine protection device (protection device), as shown in fig. 1, the protection device is provided with a high-voltage side sub-machine, a medium-voltage side sub-machine, a low-voltage side sub-machine and a main body sub-machine, and adopts a distributed structure based on a bidirectional redundant ring network (ring network), and the sub-machines are connected in series through a bidirectional redundant ring network a and a bidirectional redundant ring network B communication network.
The high-voltage side submachine is responsible for acquiring secondary voltage and current analog quantity and switch state information of a secondary high-voltage side of the transformer, controlling a tripping contact of an outlet of a high-voltage side switch and acquiring protection action state data information of the high-voltage side switch.
The medium-voltage side submachine is responsible for acquiring secondary voltage and current analog quantity and switch state information of a medium-voltage side of the secondary side of the transformer, controlling a tripping contact of an outlet of a medium-voltage side switch and acquiring protection action state data information of the medium-voltage side switch.
The low-voltage side sub-machine is responsible for collecting secondary voltage and current analog quantity and switch state information of the secondary low-voltage side of the transformer, controlling a tripping contact of an outlet of a low-voltage side switch and obtaining protection action state data information of the low-voltage side switch.
And each sub-machine transmits the acquired data of the secondary voltage current, the switching state information and the protection action state information to other sub-machines in the ring network through the data message information, and acquires the data of the secondary voltage current, the switching state information and the protection action state information of other sub-machines on other sides of the secondary side of the transformer through the ring network, so that data synchronization and sub-machine protection synchronization are carried out, and the logic of each protection function is completed.
The method of the present invention, as shown in fig. 2, comprises the following steps:
firstly, each sub-machine of the protection device collects sampling values according to a sampling frequency of 0.833 ms:
the high-voltage side sub-machine acquires A, B, C three-phase voltage instantaneous values of the secondary high-voltage side (high-voltage side) of the transformer: uha, Uhb and Uhc, instantaneous values of three-phase currents Iha, Ihb and Ihc on a high-voltage side A, B, C, input state KI _ H on the high-voltage side and protection action state data BHDZ _ H on the high-voltage side.
KI _ H is represented by 8-BIT BIT, each BIT represents an open-close quantity, the BIT BIT is 1 to represent corresponding open-close (close) and 0 to represent open-close (open). BHDZ _ H is expressed by 32-BIT BIT, each BIT represents a protection, such as differential quick-break protection, ratio differential protection, high-voltage side overcurrent protection and medium-voltage side overcurrent protection, the BIT BIT is 1 to indicate that the protection is already operated, namely the judgment result of the protection logic is that the protection logic condition is met, a protection action event is sent out, and the node is opened and closed; 0 indicates that the protection is not active.
The medium-voltage side sub-machine acquires A, B, C three-phase voltage instantaneous values of a secondary side (medium-voltage side) of the transformer: uma, Umb, Umc, instantaneous values of three-phase current of the medium-voltage side A, B, C, namely Ima, Imb and Imc, medium-voltage side input state (switching state and switching value state) KI _ M and medium-voltage side protection action state data BHDZ _ M.
KI _ M is represented by 8 BITs, each BIT represents an input quantity, the BIT of 1 represents corresponding input and output, and 0 represents input and output. BHDZ _ M is represented by 32 BITs, each BIT represents a protected segment, a BIT of 1 indicates the protected segment is active, and a BIT of 0 indicates the protected segment is not active.
The low-voltage side sub-machine acquires A, B, C three-phase voltage instantaneous values of the secondary low-voltage side (low-voltage side) of the transformer: ula, Ulb and Ulc, instantaneous values Ila, Ilb and Ilc of low-voltage side A, B, C three-phase current, low-voltage side input state (switching state and switching state) KI _ L and low-voltage side protection action state data BHDZ _ L.
KI _ L is represented by 8 BITs, each BIT represents an open-close, the BIT of 1 represents a corresponding open-close, and 0 represents an open-close break. BHDZ _ L is represented by 32 BITs, each BIT represents a protection segment, a BIT of 1 indicates the protection segment is active, and a BIT of 0 indicates the protection segment is not active.
Secondly, the sub-machine converts the acquired voltage instantaneous value, current instantaneous value and input quantity state of the sub-machine into digital quantity through analog-digital AD, and forms the agreed data message information with uniform format together with the protection action state data of the sub-machine.
And thirdly, the sub-machine sends the data message information of the sub-machine to the ring network in real time according to the frequency of 0.833ms, and sends the data message information to other sub-machines through the ring network. Meanwhile, the slave unit obtains the data message information sent by other slave units from the ring network.
And fourthly, the sub-machines respectively obtain the data of the sampling voltage instantaneous value, the current instantaneous value, the switching value state and the protection action state of other sub-machines carried in the message according to the data message information of other sub-machines in the format agreed by the looped network message, and the data are stored in a specified memory of the sub-machines to form the data information of the voltage current instantaneous value, the switching value state and the protection action state of other sides of the secondary side of the transformer.
And fifthly, the slave unit synchronizes the data of the other side voltage and current instantaneous value, the switching value state and the protection action state with the data of the side voltage and current instantaneous value, the switching value state and the protection action state in real time (data synchronization).
The submachine caches the voltage and current instantaneous value data of the current side and the received voltage and current instantaneous value data of other sides for N sampling points, wherein N is 8 in the embodiment. And then, calculating sampling data of each channel (sampling point) at the appointed (same) time according to an interpolation synchronization method in the prior art, namely Uha ', Uhb', Uhc ', Uma', Umb ', Umc', Ula ', Ulb', Ulc ', Iha', Ihb ', Ihc', Ima ', Imb', Imc ', Ila', Ilb 'and Ilc', so as to obtain the voltage and current sampling data after the synchronization of the local sub-machine.
And the sub-machines directly phase or collect and combine the switching value state data to form switching value state data KI _ ALL collected by the sub-machines. KI _ ALL uses 32 BIT representations, with KI _ L, KI _ M and KI _ H being logically OR' ed into different BIT BITs of KI _ ALL, such as: KI _ L can be the BIT8 ~ 15 of KI _ ALL, KI _ M can be the BIT8 ~ 15 of KI _ ALL, and KI _ H can be the BIT16 ~ 23 of KI _ ALL.
The sub-machines directly collect and combine the protection action state data of other sub-machines according to the logical OR, and form the protection action state data BHDZ _ AX collected by the sub-machines, wherein X represents the side difference. BHDZ _ AX is represented by 32 BITs, wherein BHDZ _ AH of the high-pressure side submachine is an OR logic result of BHDZ _ M and BHDZ _ L; the BHDZ _ AM of the medium-voltage side submachine is an OR logic result of the BHDZ _ H and the BHDZ _ L; BHDZ _ AL of the low-side submachine is the OR logic result of BHDZ _ H and BHDZ _ M.
Sixthly, protecting synchronous action of submachine
When a fault occurs, the sub-machines output control signals to the side switch to control the side switch to trip, and other sub-machines (the sub-machines) judge whether protection starting and protection action conditions are met or not according to the synchronized voltage and current sampling data and the summarized switching value state data.
(1) And if the protection starting and protection action conditions are met, the submachine sends the summarized protection action state data to the ring network.
Protection starting is entering a protection action logic judgment flow.
The protection action condition is a setting value for implementing protection setting, the protection device carries out logic judgment according to the synchronized voltage and current sampling data and the summarized switching value state data to judge whether the setting value is met, and the judgment result is that the setting value set by the protection logic is met or not.
If the sub-machine protection is started but not operated, the sub-machine forms the sub-machine protection operation state data BHDZ _ AX after the positive and negative code check according to the protection operation state data received in the ring network, and when a BIT in BHDZ _ AX is judged to be not 0, the protection cooperative action is marked as 1 according to the protection logic represented by the BIT, and the protection cooperative action logic judgment step is entered.
The protection cooperative action is that when a certain sub machine protects an actuated outlet, and other sub machines do not actuate the outlet, the action judgment conditions of other sub machines are reduced, so that the other sub machines also meet the action conditions, and the condition that the action behaviors of the sub machines are inconsistent due to errors is avoided.
(2) When other submachine judges the protection logic, if the protection is started and the protection cooperative action mark is 1, entering the protection cooperative action logic step: for the protection without time delay, directly reducing the protection action threshold to 80% threshold value; for the protection with time delay, the action time delay is reduced to 80% of the original action time delay at the same time of reducing the action threshold of the protection to 80% of the threshold value. By reducing the threshold, the time delay is reduced, the action consistency of each submachine is ensured, and the situation that other submachines jump with each other due to the mistaken jumping of certain other submachines is avoided.
(3) After 40ms, other sub machines still do not synchronously exit, and other sub machines send out an asynchronous protection action alarm signal.
The differential quick-break protection is taken as an example to explain the synchronous action of the sub-machine differential quick-break protection. The transformer is assumed to have the same CT transformation ratio of the high current transformer, the medium current transformer and the low current transformer.
(1) The magnitude of each phase difference flow of the high, medium and low voltage side machines is as follows:
Ida＝IHa’+IMa’+ILa’ (1)
Idb＝IHb’+IMb’+ILb’ (2)
Idc＝IHc’+IMc’+ILc’ (3)
in the formulas (1), (2) and (3), Ida, Idb and Idc are respectively the differential flow values of each phase of the high, medium and low voltage side sub-machines.
The submachine respectively judges whether the differential current value meets the differential quick-break protection action condition:
in the formula (4), IcdsdThe differential quick-break protection current setting value is obtained.
(2) If a certain fault occurs, the differential quick-break protection action condition of the high-voltage side submachine is met, at the moment, the submachine at the high-voltage side directly outputs a control signal to a local side switch to control the tripping (outlet high-voltage side switch), and the BIT corresponding to the differential quick-break protection action state of the submachine at the high-voltage side is set to be 1. If the differential quick-break protection action is the first BIT of BHDZ _ H, the first BIT of the high-pressure side protection action state positive code BHDZ _ H is set to 1, 32 BITs of BHDZ _ H are BIT-by-BIT negated to form a high-pressure side protection action state negative code BHDZ _ HF, and then the BHDZ _ H and the BHDZ _ HF are sent to the ring network in real time and transmitted to other submachine through the ring network.
The positive and negative codes of the protection action state are used for ensuring the data accuracy of a data sending party and a data receiving party, and the sending party transmits 32-bit data (positive codes) and simultaneously transmits the 32-bit data with values (negative codes) obtained by bit-by-bit negation. After receiving the positive code and the negative code, the receiver compares the BIT-by-BIT reversed value of the negative code data with the positive code to confirm that all the BIT values are completely consistent.
(3) In the above-described failure situation, if the differential quick-break protection of the medium-voltage-side slave machine has been activated, the medium-voltage-side slave machine directly sets 1 to the first BIT (corresponding to the differential quick-break protection) of the protection activation state flag BHDZ _ AM of the medium-voltage-side slave machine.
Under the fault condition, if the differential quick-break protection of the middle-pressure side submachine does not act, the middle-pressure side submachine checks after acquiring the positive and negative codes BHDZ _ H and BHDZ _ HF of the high-pressure side protection action state from the ring network, compares the BHDZ _ HF with the BHDZ _ H after bit-by-bit negation to determine whether the BHDZ _ HF and the BHDZ _ H are completely consistent, and the consistency indicates correct checking; the inconsistency indicates a check failure and all BITs of the BHDZ _ HF are cleared (zeroed).
After the verification is correct, the BHDZ _ H and the BHDZ _ L (the differential quick-break protection of the medium-voltage side submachine is not operated and is 0) are summarized, a protection cooperative action mark BHDZ _ AM of the medium-voltage side submachine is marked, and the first BIT differential quick-break protection cooperative action state of the BHDZ _ AM is set to be 1.
The medium-voltage side sub-machine carries out differential quick-break protection logic judgment, if the differential quick-break protection is started, namely the protection action logic judgment flow is entered, the differential quick-break current setting value I is directly setcdsdReducing the differential speed to 80 percent, and adjusting the differential speed protection action conditions of the medium-voltage side machine into:
if the formula (5) is satisfied, the medium-voltage side sub-machine performs differential quick-break protection action, and directly outputs a control signal to the local side switch to control the tripping (the outlet jumps to the medium-voltage side switch).
If the formula (5) is not satisfied, and after the time lasts for 40ms, an out-of-synchronization protection action alarm signal is generated.
(4) For differential quick-break protection without delay, if the differential quick-break protection has been activated, the protection action threshold is lowered to 80% of it. By reducing the threshold, the synchronous action outlet of each submachine can be ensured, and the tripping time interval of each submachine outlet is prevented from being too long.
For the differential quick-break protection with time delay, if the differential quick-break protection is started, the protection action threshold is reduced to be fixed to 80% of the threshold fixed value, and the action time delay is shortened to be 80% of the delay set value.
The differential quick-break protection method of high-pressure side → low-pressure side, medium-pressure side → high-pressure side, medium-pressure side → low-pressure side, low-pressure side → medium-pressure side is the same as the above description.
Besides differential quick-break protection, other protection type protection methods are also the same.
In the embodiment, the on-site transformer multi-sub-machine protection device is a Zynq7000 type transformer protection device of Changyuan deep Ray relay protection automation company Limited, the sampling frequency is 1200Hz, the CPU is realized by adopting a Cortex-A9 processor and PRS-778 protection software V1.00.
The method of the invention adopts a multi-submachine element protection device with a distributed structure based on a bidirectional redundant ring network, each submachine is respectively responsible for collecting secondary voltage and current, switching state information and protection action state data of one side or a part of branches, the collected data is transmitted to other submachines in the network through a ring network, each submachine carries out data synchronization and submachine protection synchronization by acquiring the data of other submachines from the ring network, and under the condition of rapidly judging that any submachine has an action exit, the ring network informs other submachines to adjust the logic judgment of other submachines, thereby realizing the consistency of the action behaviors of all the submachines in the ring network and finishing each protection logic. The problem that the actions of the submachine in the in-situ looped network are inconsistent or the action time difference is large is effectively solved, and the protection cooperativity of the multiple submachine of the element is improved.
The method has the advantages that original alternating current sampling of the multiple sub machines of the ring network and the connection of the input and output analog quantity are not required to be changed, too much calculation amount is not required to be increased, consumed CPU resources are less, consistency of protective actions of the multiple sub machines of the ring network is guaranteed under the condition of failure, operation stability of the power system is improved, and safe and reliable operation of the power system is guaranteed.
Claims (10)
1. A method for synchronizing actions of multiple sub-machines of an in-situ component protection ring network comprises the following steps:
firstly, collecting sampling values of the side by each submachine of the protection device: A. b, C three-phase voltage instantaneous value, three-phase current instantaneous value, input quantity state, protection action state data;
secondly, the sub-machine converts the acquired voltage instantaneous value, current instantaneous value and input quantity state of the sub-machine into digital quantity through analog-digital conversion, and forms data message information in an agreed unified format together with the protection action state data of the sub-machine;
thirdly, the sub machine sends the data message information of the sub machine to the ring network in real time and sends the data message information to other sub machines through the ring network; meanwhile, the submachine acquires data message information sent by other submachines from the ring network;
fourthly, the sub-machines respectively obtain data of sampling voltage instantaneous values, current instantaneous values, switching value states and protection action states of other sub-machines according to the data message information of other sub-machines in the format agreed by the looped network messages, and store the data in the appointed memory of the sub-machine;
fifthly, the sub-machine carries out data synchronization on the data of the voltage and current instantaneous value, the switching value state and the protection action state of other sides and the data of the voltage and current instantaneous value, the switching value state and the protection action state of the sub-machine in real time;
sixthly, protecting synchronous action of submachine
When a fault occurs, the submachine outputs a control signal to the local side switch to control the submachine to trip, and other submachines judge whether protection starting and protection action conditions are met or not according to the synchronized voltage and current sampling data and the collected switching value state data, and the method comprises the following steps:
(1) if the protection starting and protection action conditions are met, the other submachine sends the summarized protection action state data to the ring network;
if the protection of other submachine is not started, entering a protection cooperative action logic judgment step;
(2) for the protection without time delay, directly reducing the protection action threshold to 80% threshold value; for the protection with time delay, the action time delay is reduced to 80% of the original action time delay when the action threshold of the protection is reduced to 80% of the threshold value;
(3) after 40ms, other sub machines still do not synchronously exit, and other sub machines send out an asynchronous protection action alarm signal.
2. The method for synchronizing the actions of multiple sub-machines in the in-place component protection ring network according to claim 1, wherein: the first side of the step is the secondary side of the transformer.
3. The method for synchronizing the actions of multiple sub-machines in the in-place component protection ring network according to claim 1, wherein: and (3) collecting sampling values of all the submachine of the protection device according to the sampling frequency of 0.833 ms.
4. The method for synchronizing the actions of multiple sub-machines in the in-place component protection ring network according to claim 1, wherein: a, B, C three-phase voltage instantaneous values, three-phase current instantaneous values and input quantity states in the first step, and the protection action state data are as follows:
the high-voltage side sub-machine acquires A, B, C three-phase voltage instantaneous values, three-phase current instantaneous values, high-voltage side input quantity states and high-voltage side protection action state data of a transformer secondary side high-voltage side;
the medium-voltage side sub-machine acquires A, B, C three-phase voltage instantaneous values, three-phase current instantaneous values, medium-voltage side input quantity states and medium-voltage side protection action state data of a transformer secondary side medium-voltage side;
the low-voltage side sub-machine collects A, B, C three-phase voltage instantaneous values, three-phase current instantaneous values, low-voltage side input quantity states and low-voltage side protection action state data of the secondary side low-voltage side of the transformer.
5. The method for synchronizing the actions of multiple sub-machines in the in-place component protection ring network according to claim 1, wherein: and the submachine sends the data message information of the submachine to the ring network in real time according to the frequency of 0.833 ms.
6. The method for synchronizing the actions of multiple sub-machines in the in-place component protection ring network according to claim 1, wherein: and the fourth sub-machine respectively stores the data of the voltage instantaneous value, the current instantaneous value, the switching value state and the protection action state sampled by other sub-machines into a specified memory of the sub-machine to form data information of the voltage and current instantaneous value, the switching value state and the protection action state of other sides of the secondary side of the transformer.
7. The method for synchronizing the actions of multiple sub-machines in the in-place component protection ring network according to claim 1, wherein: and fifthly, synchronizing data, namely caching the voltage and current instantaneous value data of the slave machine and the received voltage and current instantaneous value data of other sides by the slave machine, calculating sampling data of each channel at a specified time according to an interpolation synchronization method, and obtaining the voltage and current sampling data synchronized by the slave machine.
8. The method for synchronizing the actions of multiple sub-machines in the in-place component protection ring network according to claim 1, wherein: and step five, synchronizing data, and enabling the submachine to sum or summarize the switching value state data to form the summarized switching value state data of the submachine.
9. The method for synchronizing the actions of multiple sub-machines in the in-place component protection ring network according to claim 1, wherein: and fifthly, synchronizing data, and summarizing and combining the protection action state data of other sub-machines by the sub-machines according to logic OR to form the protection action state data summarized by the sub-machine.
10. The method for synchronizing the actions of multiple sub-machines in the in-place component protection ring network according to claim 1, wherein: and before the step six enters the protection cooperative action logic judgment step, positive and negative code verification is carried out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811626204.0A CN109768533B (en) | 2018-12-28 | 2018-12-28 | Method for synchronizing actions of multiple sub-machines of in-situ component protection ring network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811626204.0A CN109768533B (en) | 2018-12-28 | 2018-12-28 | Method for synchronizing actions of multiple sub-machines of in-situ component protection ring network |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109768533A CN109768533A (en) | 2019-05-17 |
| CN109768533B true CN109768533B (en) | 2019-12-24 |
Family
ID=66452199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811626204.0A Active CN109768533B (en) | 2018-12-28 | 2018-12-28 | Method for synchronizing actions of multiple sub-machines of in-situ component protection ring network |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109768533B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111431690B (en) * | 2020-04-03 | 2023-03-28 | 南京南瑞继保电气有限公司 | Sub-machine sampling synchronization method based on in-situ looped network |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102916394B (en) * | 2011-12-24 | 2015-07-15 | 许继电气股份有限公司 | On-site transformer protection system used for intelligent transformer substation |
| CN105896470A (en) * | 2016-06-03 | 2016-08-24 | 南京国电南自电网自动化有限公司 | Double loop network-based protection device free of main in-situ transformer and protection method |
-
2018
- 2018-12-28 CN CN201811626204.0A patent/CN109768533B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109768533A (en) | 2019-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Seyedi et al. | New centralised adaptive load-shedding algorithms to mitigate power system blackouts | |
| US8959393B2 (en) | Centralized and networked protection system and method of a regional distribution network | |
| CN110148930B (en) | Method for fault location and automatic topology identification in power distribution network | |
| Lagos et al. | Microgrid protection against internal faults: Challenges in islanded and interconnected operation | |
| CN107204663B (en) | Backup protection method for distributed intelligent power distribution network | |
| Zin et al. | A review of under-frequency load shedding scheme on TNB system | |
| CN105207178A (en) | Distribution network fault location and islanding method based on DG access | |
| CN113054631A (en) | Power distribution network fault isolation self-healing system and method | |
| Maiola et al. | A multi-agent system for protection coordination of radial systems in the presence of distributed generation | |
| Liu et al. | A simple multi agent system based adaptive relay setting strategy for distribution system with wind generation integration | |
| CN109768533B (en) | Method for synchronizing actions of multiple sub-machines of in-situ component protection ring network | |
| CN108469557B (en) | High voltage direct current transmission device Fault Locating Method based on inverter differential protection | |
| Kim et al. | Active TCC based protection coordination scheme for networked distribution system | |
| CN107039958B (en) | A kind of protection system to earth and method of wind power plant box type transformer low-pressure system | |
| CN104882904A (en) | Novel photovoltaic power station passive anti-islanding protection method | |
| CN114256815B (en) | Simple bus protection method, device, equipment and storage medium | |
| CN113541109B (en) | Feeder fault processing system and method based on power wireless private network | |
| CN115079054A (en) | Method and system for judging power loss of alternating current section of power system | |
| Tan et al. | Intelligent wide area back-up protection and its role in enhancing transmission network reliability | |
| CN114759668A (en) | Low-voltage distribution transformer area fault positioning system and method | |
| CN110932228B (en) | Centralized reclosing method under breaker failure condition | |
| Liu et al. | Multi-agent system based adaptive protection for dispersed generation integrated distribution systems | |
| Chang et al. | An Adaptive Coordinated Wide-Area Backup Protection Algorithm for Network Topology Variability | |
| CN113346462A (en) | Petal type power distribution network contact line protection method based on predicted voltage amplitude | |
| CN112819650A (en) | Data modeling method for safety and stability control device of digital substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Shan Guangzhong Inventor after: Chen Yuansheng Inventor after: Lu Zhaoyan Inventor after: Shi Lei Inventor after: Zhou Hao Inventor after: Ma Qiujie Inventor after: Yuan Lu Inventor after: Wei Shenghua Inventor after: Song Zhiming Inventor after: Xu Gui Inventor after: Han Jianya Inventor after: Li Zhiling Inventor after: Wu Zhanguo Inventor after: Zhang Zhimin Inventor after: Song Haitao Inventor after: Zhang Guangjia Inventor before: Zhang Guangjia Inventor before: Chen Yuansheng Inventor before: Lu Zhaoyan Inventor before: Shi Lei Inventor before: Zhou Hao Inventor before: Ma Qiujie Inventor before: Yuan Lu Inventor before: Wei Shenghua |
|
| CB03 | Change of inventor or designer information | ||
| CP03 | Change of name, title or address |
Address after: 014000 No. 21, Qingshan District, the Inner Mongolia Autonomous Region, Jianshe Road, Baotou Co-patentee after: CYG SUNRI Co.,Ltd. Patentee after: BAOTOU POWER SUPPLY BUREAU OF INNER MONGOLIA POWER (GROUP) Co.,Ltd. Address before: 518057 Guangdong science and Technology Industrial Park, Shenzhen, Nanshan District, north north science and technology 13 North Road Co-patentee before: BAOTOU POWER SUPPLY BUREAU OF INNER MONGOLIA POWER (GROUP) Co.,Ltd. Patentee before: CYG SUNRI Co.,Ltd. |
|
| CP03 | Change of name, title or address |